Pay attention to whether the marks meet the requirements, whether there is bad printing and so on.
Does the packing method meet the requirements
2) check color boxes and accessories
Pay special attention to missing relevant accessories (including fan blade, mesh bundle, screw bag, etc.)
Pay special attention to all packaging materials (including instructions, warranty CARDS, etc.)
3) installation instructions shall include:
The type and type of lighting appliance installed on the fan shall be specified
Whether partition fans can be installed outside Windows or walls;
For fans installed at higher locations, the blades shall be 2.3m above the ground;
For duct fans and partition fans, care must be taken to prevent gas from returning into the room through open air passages or other open flame devices
2. Security inspection and testing
1) whether the product has sharp edges and corners (especially the metal nose and mesh cover)
2) whether the power cord has broken skin or exposed copper (pay special attention to the outlet of the power cord)
3) high voltage test and grounding test
International standard: iec60335-1 & iec60335-2-80
American standard: ul-507
4) special reminder: high pressure danger, pay attention to safety
Validity of instrument
The normal function of the instrument
Set parameters according to standard requirements (test voltage, test current, test time)
3.Appearance inspection
1) check whether the products are consistent with the samples, specifications, orders, pictures and contents of color boxes and instructions provided by the customer.
2) are there any missing product labels
3) there is no omission or wrong printing of product trademarks, there is no poor silk screen printing.
4) appearance should not have some bad defects (such as dirt, scratch, deformation, rust, oxidation, poor spraying, poor electroplating, mixed color, etc., pay special attention to the motor rust)
Special note: make sure you have enough light
(1) nameplate
Use the letter “T” for fans used in tropical climates.
When the ambient temperature is higher than 40, the fan must indicate the ambient temperature
(2) ceiling fan: pay special attention to the fact that the LNE label cannot be inverted
4. Mechanical assembly inspection
1) whether all parts are well coordinated, and whether there is significant gap and segment difference.
2) pat the machine by hand and shake it. Check whether there are any foreign bodies (such as screws and muons) or loose assembly in the product.
3) check whether the base is uneven (put the product on the glass to see if it is shaking, use a stopper) (except ceiling fan)
4) whether the front and rear mesh covers are well matched.
5. Function check
1) check the function of switch keys
2) check the performance of operation and speed regulation
3) input power test
4) check the function of lifting head and swinging head (table fan, floor fan)
5) check the performance of operation and speed regulation
6) positive and negative rotation function check (ceiling fan)
1.1 During the injection molding production process, the operator must make a self-inspection record to check the appearance of the product. The inspector should make the first signed seal of the product and fill in the “first inspection record card”. Product sampling inspections are required. Each inspection item must be complete. At the same time, the three links of packaged products, workbench products and machine random products must be verified at the same time. If problems are found, they should be corrected and coordinated in a timely manner. recording”;
1.2 The inspection requires the operator to rework the products that fail the self-inspection, and record, mark and review the reworked products until the product quality requirements are met, otherwise it is not allowed to stamp into the warehouse, and to ensure that the unqualified products are handed over during the shift The information is completely transmitted to the next inspection staff to prevent the accidental production and misuse of parts and materials;
1.3 The quality supervisor shall collect the inspection report every day and check the inspection records. If the records are inaccurate or in doubt, ask the relevant inspectors to understand and confirm. If it is careless, wrong, and inadequate, ask for notification and criticism. And the performance deduction will be assessed and deducted on the same day. Inspectors who have failed to implement the inspection work guidance for many times will consider changing posts or dismissing them;
1.4 After the finished products of each injection molding section are qualified, the inspection shall be stamped on the “Product Production Process Card” before entering the warehouse or transferring to the next process. The injection molded finished products, semi-finished products, qualified and unqualified products, etc. shall be in accordance with the specified area. Neatly placed and labeled in accordance with the principles of identification and traceability management, inspectors have the right to control and coordinate the process, and have the right to order employees to rectify or shut down for erratic identification.
2.1 Product inspection and confirmation after refueling During the inspection process, when the machine is refueled or refilled, the inspection must confirm the quality parameters of the product’s appearance, engineering dimensions, performance strength and component assembly according to the first item inspection standard, and investigate and understand the materials used. Whether the batch has changed, which is convenient for recording and preventing the occurrence of badness;
2.2 Inspection and confirmation of products after mold repair When the mold is abnormally repaired and the sample is finished, the inspection must confirm the quality parameters such as the appearance, engineering size, performance strength, and assembly degree of the product one by one according to the first item inspection standard, and check the previous samples to confirm that they are correct. Only after the mass production can be put into production, if the mold is a major maintenance issue, the quality engineer can pass the inspection according to the above items before mass production, and if necessary, a long-term verification and tracking is required;
2.3 Inspection and confirmation of products by newcomers When the machine is replaced, newcomers work, etc., the foreman and inspection must strengthen the number of inspections, clearly inform the product attention and ensure that all employees understand, repeatedly check the proficiency of novice operations in the process, and correct any abnormalities in time. Change the operation of skilled employees at times to ensure the stability of quality;
2.4 Inspection and confirmation of products after water and power failure During the production process, due to external reasons such as water outages and power outages, the machine was restarted for production. At this time, the machine’s work was in an unstable state. The inspectors should confirm the products one by one according to the first inspection standard. Appearance quality, engineering size, performance strength and component assembly degree, etc., and comparing with the previous samples, confirm that the product is qualified before mass production, and continue to follow up until the machine runs and the product quality stabilizes;
2.5 Inspection and confirmation of products after process adjustment During the production process, the product mutates, and the workshop foreman or production supervisor readjusts the machine. After the original problem is overcome by changing the molding parameters of the machine, the inspection must reconfirm whether the quality of other inspection items has changed and whether various performances meet the requirements. For example, by increasing the temperature to overcome whether the poor appearance of the product will affect the physical properties of the plastic and make the product brittle, etc., to avoid new bad problems causing batch quality accidents;
2.6 Inspection and confirmation of products during shift During the shifting process of the workshop, due to personnel changes, new material replacement has not been confirmed, the shift time has not been confirmed, the shift inspection has forgotten to complete the handover, or other reasons, etc., hidden quality risks for the production of the machine, which may cause the risk of batch quality accidents. In addition to the strict implementation of inspections, the successor inspectors must confirm the inspections and self-inspection forms of the shifts, understand the use of materials, etc., be familiar with the quality of the shifts in time, and take measures to ensure that changes in the ability to affect the process are timely done. Out reaction.
3.1 Concessions When the production is urgently needed and the mold has problems, the process cannot be modified or the process control is negligent, and the batch problem caused the product to occur, the release review process should be strictly implemented. When the evaluation can be released, the workshop will apply for the release. After inspection and confirmation, engineering review Concessions will be released after approval by the relevant leaders. Relevant supervisors will implement their responsibilities and deduct penalties. Inspections of unprocessed products that have not gone through the approval procedures shall not be stamped, and warehouse management shall not be entered or reversed.
3.2 Rework Retest When the process control is negligent or the employee fails to process the product according to the inspection requirements, resulting in defective batches that need to be processed, the workshop shall arrange employees to rework the product outside normal working hours in accordance with the “Regulations for the Management of Injection Molding Workshops”. The employees will be deducted and assessed. After rework, they will pass the inspection and re-inspection before passing the seal and entering the warehouse or reordering.
3.3 Disposal The relevant provisions of the review and implementation process for the release of products. If they cannot be reused after review, they must be scrapped. The scrap should be scrapped by the production workshop, signed and confirmed by the relevant quality supervisor, and scrapped only after approval by the leader. Major general accidents must be referred to the general manager for decision. , Scrapped or abandoned privately, once found triple penalty.
4.1 The quality control personnel should promptly correct the problems found, analyze them, find out how to improve them, implement the control according to the corrective and preventive measures control procedures, contact the workshop for processing, and have the right to implement shutdown rectification for the unimproved machines and molds until the problem Can not be produced until it is resolved;
4.2 The handling of defective products must implement responsibilities, implement penalties, and implement corrective and preventive measures through investigation reports, order relevant departments and personnel to improve, and pass the quality department to verify that they are deemed to be closed. The follow-up process and feedback are handled by the quality department. Arrange implementation, other departments must cooperate to implement;
4.3 The improvement of the injection molding process involves modifying process documents or quality management documents in accordance with the requirements of document and data management procedures, and exploring the deficiencies and missing items in inspection specifications and operating instructions for the causes of abnormalities and out-of-control processes. To gradually improve process control documents and improve process control capabilities.
5. Quoting standards: ISO9001: 2000 version of the relevant provisions of the “Quality Manual”, each program file.
Distance: The distance between the human eye and the surface of the measured object is 250mm-350mm
Time: each side inspection time does not exceed 5-10S
Position: The viewing surface is 45 ° from the desktop, turned 15 ° up, down, left and right, flipped back and forth
Light source: D65-CLE standard light source (light source must be directly above the tester)
Temperature: 23 +/- 3 celsius
Humidity: 30% -85%
Light intensity: 1000 ± 200LUX
Vision: The inspector’s vision needs to be above 1.0
Detection tools: caliper, tape measure, ruler
2. Summary of bad defects
Shell cracking: caused by external force or material factors
Deformation: caused by external force interference
Scratches: caused by sharp objects
Shrinkage: molding cooling time is too short
Smudge: environmental factors or grease on the work surface
Oxidation: Blackening of hardware
Thread burns: caused by improper workmanship or operation
The nameplate is affixed: the nameplate is not correctly affixed
Nameplate down: nameplate down
Missing nameplate: Missing nameplate when employees operate
The nameplate is tilted: the nameplate is not in place and not tight
Can’t download: Can’t download songs or videos after connecting to a computer
Not charging: internal device is damaged or other reasons
3. Packaging inspection
Check whether the packaging method meets the requirements and whether there is a PASS label or seal affixed by the supplier
Confirm whether the outer packaging specification model, material code, quantity, production date, production batch number are correct
Whether the outer box marking is correct, there must be no incomplete marking and incorrect marking
The outer packing box must not have obvious folds, breakage, dirt, deformation, moisture, etc.
The changed materials must be conspicuously marked, and three batches of markings must be made in succession. If there are special needs, communication and written notification are the main
1. The nameplate is curled. When inspecting the goods, it is found that the nameplate with the curled corner is very easy to stick to the plastic packaging bag and tear off when opening the package
2.The design temperature is different from the actual adjustable temperature
3. Temperature conversion between Celsius and Fahrenheit. The product and instruction manual lack instructions on how to convert.
4. Button failure, disassembly inspection found that the button height of the micro switch is not consistent with the design height.
5. Panel corner crack.
6. The sealing strip blocks the rollers of the curtain.
The One Belt One Road strategy is built on the ancient and maritime silk road. It is a major strategy proposed by China for the transformation of the national economy in recent years. It is conducive to promoting the rapid development of the Chinese economy, effectively solving the problem of excess production capacity, promoting GDP growth and domestic employment, and reducing the gap between different regions This gap provides favorable guarantees for building a harmonious society. The challenges brought by the Belt and Road Initiative to China’s economic development are:
1. The positive impact of the Belt and Road Strategy on China’s economic development (1) Promote the regional economy in the central and western regions and consolidate the coastal economy in the east. Under the new situation, the Silk Road economy is rich in natural resources. However, due to subjective and objective factors in various aspects, there are certain problems, such as inconvenient transportation, Economic development is slow, and there is an urgent need to revive the ancient Silk Road, give full play to all aspects of the advantages of the central and western regions, and promote the comprehensive development of the central and western regions. Under the role of the Belt and Road Initiative, traditional and characteristic industries in the central and western regions have developed rapidly, and a brand-new industrial chain has emerged. Together with the implementation of the western development strategy, China’s central and western regions have ushered in new development opportunities and greatly accelerated the central and western regions. The speed of regional development is conducive to improving the overall economic benefits of the region. At the same time, under the role of the Belt and Road Initiative, the eastern coastal economy has been further consolidated. As far as the eastern region is concerned, it has convenient water transportation and superior natural conditions, but the social market space is gradually saturated, and the lack of consumer demand is widespread. With the help of the One Belt One Road strategy, the eastern coastal areas have new development opportunities, further expansion of foreign markets, the implementation of the One Belt One Road strategy, effectively consolidating the economy of the eastern coastal areas, and promoting the development of the region in a better and faster way. Be prepared for comprehensive strength. (2) Effectively solving the problem of overcapacity In the process of China’s economic development, the importance of the implementation of the Belt and Road Initiative is self-evident. In the context of the social market economy, China’s economic growth is already in a new normal, which is conducive to the effective solution of the problem of excess capacity. Many areas have ushered in new development opportunities, such as real estate, cement, and steel, which are conducive to the implementation of the global strategy. Under the One Belt One Road strategy, the relevant industries have been effectively integrated. For example, in 2016, Baosteel’s internal planning and reorganization effectively disposed of zombies and so on, and improved energy efficiency in various aspects. At the same time, since the reform and opening up, China has been developing labor-intensive manufacturing industries with the help of developed country markets, such as the United States and Europe. However, as labor costs are increasing, China ’s manufacturing industries are in trouble. Some industries with excess capacity are not saturated in many less developed countries, and demand is particularly high. In this context, with the help of the Belt and Road Initiative, China is better positioned on the road of international capacity cooperation. The output of industries and capabilities has become the key, not just commodity trade and various products.
(3) Conducive to industrial transformation and upgrading, and embark on the road of brand autonomy. From an objective perspective, the One Belt One Road strategy meets the objective requirements of the new normal development of the Chinese economy, conforms to the objective laws of the development of the times, and promotes the overall development of the Chinese economy. Important Guarantee. In the past, in terms of foreign trade, China was at the bottom of the industrial chain, with processing trade as its center. The added value of the industry was not high, and it did not have a high return on investment, which seriously affected the sustainable development of the Chinese economy. Under the Belt and Road Initiative, China’s industrial structure can be better transformed and upgraded. Enterprises in related industries can optimize the use of a series of advanced technologies and experience, optimize the traditional extensive industrial structure, and transform to an intensive industry, which will help strengthen their innovation awareness and optimize utilization. All aspects of resources, build independent brands, effectively respond to the rapidly changing international market, and better respond to challenges from various aspects. For example, in 2014, Chery Automobile has appeared in the Iranian market. This is a Chinese company’s overseas investment and development of independent brands. A major breakthrough in this regard has far-reaching significance. Under the role of the Belt and Road Initiative, China’s domestic demand has further expanded, exports have increased sharply, the surplus labor force has been improved, more platforms have been provided for individual employment, entrepreneurship and even innovation, and a harmonious and stable energy supply environment has benefited China. Industries and fields develop better.
2. Challenges brought by the Belt and Road Strategy to China’s economic development While promoting the economic development of China, the Belt and Road Initiative has brought new challenges, which are reflected in different aspects. (1) The economic development is in an unbalanced state, and the market is difficult to expand. Developed and emerging economies are included along the Belt and Road, and economic development is not balanced, which is not conducive for Chinese companies to better enter relevant markets, mainly because in the new situation, market access standards are not the same, and business cooperation In the process, it is difficult for Chinese companies to accurately grasp the corresponding scales in accordance with specific conditions, resulting in more uncertain factors in economic and trade exchanges. At the same time, along the Belt and Road, most of them belong to developing countries. The overall economic level needs to be improved. To achieve a win-win situation, we need multiple efforts.
(2) The political instability of the countries along the route is not conducive to the overall development of China’s economy. As far as the Belt and Road is concerned, there are particularly many countries involved. Some of them have conflicts in various aspects, such as territories, races, religions, and are threatened by terrorist forces. They are not conducive to social stability and hinder the pace of economic development. . In other words, in the course of trade, the investment risk coefficient of imports and exports will definitely increase. In addition, some countries’ politics is in turmoil. China’s expansion theory and China’s threat theory will affect the implementation of the Belt and Road Strategy and hinder China. Comprehensive economic development.
3. Concluding Remarks In the context of the social market economy, the proposal of the Belt and Road Initiative has had varying degrees of impact on the overall development of the Chinese economy. The advantages outweigh the disadvantages, and are conducive to promoting the comprehensive economic development of the central and western regions of China. Solving the problem of excess capacity is conducive to the transformation and upgrading of the industrial structure, but there are also certain risks, large cultural differences, and political instability. Chinese enterprises must integrate their own operating conditions, base on the basic national conditions, implement the Belt and Road development concept, give full play to their advantages in various aspects, promote the comprehensive development of China’s economy, continuously enhance China’s comprehensive strength, and embark on a long-term development path. China occupies an important position.
Metal stamping is the use of punch press and mold stainless steel, iron, aluminum, copper and other plates and the opposite material deformation or fracture, to achieve a certain shape and size of a process. Usually metal stamping technology using plate, thin wall tube, thin profile as raw materials, with easy operation, high stamping precision, easy to achieve mechanization and automation and other advantages. What are the methods to improve the metal stamping process:
One, the rational development of stamping processing technology
1, hardware stamping parts in the design of the structural shape of parts, it is best to use a simple and reasonable structure of the surface and its combination, but also should try to make the minimum number of processing surfaces and processing area.
2, metal stamping materials, not only to meet the technical requirements of product design, but also to meet the requirements of stamping process and stamping after cutting, electroplating, cleaning and other processing requirements.
3, metal stamping forming performance requirements for the forming process, in order to facilitate the stamping deformation and improve the quality of the parts, the material should have a good plasticity, small flexural strength ratio, plate thickness directional coefficient, plate plane directional coefficient, material yield strength and elastic modulus ratio is small. For the separation process, the material does not need to have a good plasticity, but should have a certain plasticity, the better the plasticity of the material, the more difficult to separate.
4. Select the method of blank preparation in reasonable mechanical manufacturing, which can directly use profile, casting, forging, stamping and welding, etc. The selection of blank is related to the specific production technical conditions, generally depends on the production volume, material properties and processing possibilities.
5. Specify the processing cost of parts with appropriate manufacturing accuracy and surface roughness. The processing cost of hardware stamping parts will increase with the improvement of accuracy, so the surface roughness of hardware stamping parts should be made appropriate provisions according to the actual needs of the surface.
6, the selection of stamping oil should meet the technical requirements, the stamping oil with excellent performance can significantly improve the processing environment, improve the accuracy of the workpiece.
Two, the principle of stamping hardware processing
1. Precision principle: the number of working procedures of drawing parts is related to the properties of materials, drawing height, number of drawing steps, drawing diameter, material thickness and other conditions, which can only be determined by drawing process calculation.
2. Principle of refinement: the number of working procedures of bending parts mainly depends on the complexity of their structural shapes, which shall be determined according to the number of bending angles, relative positions and bending directions.
3, fine principle: when the requirements for the section quality and dimensional accuracy of the stamping workpiece is higher, you can consider adding the finishing process after the blanking process or directly using the precision blanking process.
4, precise principle: blanking the shape of the workpiece is simple, the use of a single process mold can be completed, and in blanking the shape of the workpiece is complex, because the structure or strength of the mold is limited, its internal and external contour should be divided into several parts blanking, need to use multiple processes of hardware stamping processing. If necessary, a continuous die can be used. For the workpiece with higher flatness requirements, a leveling process can be added after the blanking process, the characteristics of each product accurate into the production process.
5, quality principle: in order to ensure the quality of precision metal stamping parts, improve the stability of metal stamping processing technology sometimes need to increase the number of procedures. Such as additional positioning process of the bending hole punching, forming process to increase the deformation to reduce the hole blanking to transfer the deformation area, to ensure that each product to achieve precision, fine, fine quality.
The above is the method to improve the quality of metal stamping parts, the system of reasonable processing technology is to improve the workpiece accuracy of the most effective method
First. Integrated Process 1. Inspect the frame for damage and lens scratches. 2. Check whether the lens film layer is consistent and whether the color depth of the tinted lens is the same. 3. According to the order of the glasses, whether the corresponding frames and lens brand models match. 4. Adjust the frame to the standard level. 5. Measure the lens power (including astigmatism power and astigmatism axis), and punch out the optical center point. 6. Determine whether the lens power is consistent with the data (including astigmatism power and astigmatism axis). 7. Measure the interpupillary distance to see if it matches the data. 8. Determine and calculate the mutual difference between the upper and lower levels of the lens and the mutual difference between the left and right interpupillary distance. 9. According to the data showing near or far use, determine whether the position of the optical center point is correct (the distance of the optical center point should be in the upper center of the lens. The contrary is used for near use). 10. Check the remarks column of the optician order to see if there are special requirements for processing (such as modification, chamfering, polishing, etc.). 11. After cleaning the glasses, wrap them in a mirror cloth and put them in the mirror box. Sign the name and seal of the quality control officer on the data card, and put them into the pick-up cabinet.
Second, the full frame matters needing attention: 1. Check whether the closing is locked. If the lock is not tight, the lens is too large. (The joint is not more than 0.5mm) 2. Turn the lens after tightening the screw. If it is loose, the lens is too small. 3. Check if there are pads in the mirror ring. If there are pads or glue, it is unqualified. 4. Check whether the lens ring is deformed, whether the size of the two lens rings is the same, and whether there is a gap between the lens of the frame.
Third, half-frame notes: 1. Check whether the grooves are even and whether there are double or multiple grooves. 2. Whether the lens size is the same, whether the lens will be loose, and whether there is a phenomenon of jumping. If it is low, pay special attention to the nose. 3. Whether the lens has been polished and whether both sides are polished.
Fourth, borderless matters needing attention: 1. Whether the punch position is on a horizontal line. 2. Whether the size of the hole is appropriate, whether the lens will be loose, and whether the frame blade and the lens are compliant. 3. Whether the shape and size of the lenses are the same, have they been polished? 4. Whether there is a split in the punched position.
1. Switch performance detection: An umbrella is in your hand. First, you need to open the umbrella flexibly. Once you open it to the top, it is unobstructed and does not fall. It is just a matter of closing it. The switch parts do not malfunction or fall off. When using an automatic umbrella, good opening and closing is the standard, and the automatic button will not fail. The button must not be actuated by itself. Press the button lightly with your hand. The self-opening speed should be fast but not fierce, even and strong, and the pulling force should not be excessive when retracting.
2. Umbrella bone inspection: The umbrella bone should not be easy to rust, the electroplated surface should be smooth, and the spring should be elastic. After the umbrella bone is retracted, it should be close to the umbrella pole. The upper, middle, and lower nest ties must be flattened so that they are level and without thorns. When the switch is used for recycling, the medium rod electroplating will not be surrounded by flowers and make metal noise.
3. Umbrella surface inspection: Umbrella cloth should be a special umbrella cloth with twill weave, and it should be flat and tight, no rain, no pollution, no holes, no jumping yarn, uniform color, similar flower shape and striped stitching. The surface of the nylon cloth umbrella should have a rain-proof resin glue, it should not leak during the rainstorm, there should be no obvious weaving defects and leaking pulp, and there must be no star light transmission. When the umbrella surface is opened, the umbrella shape should be full and beautiful, and should not be “pot-shaped” or “deep bowl-shaped”. The testing standard of rainbow umbrellas must be cleaned and cut off. The umbrella cloth must not have any thread ends.
4. Inspection of other parts: Umbrella should be round and bright, no burrs, no shelling, weld seam cracking, etc. The exposed end face should be flat without sharp, light and empty. The shape of the umbrella handle should be beautiful, firm, and comfortable, etc. In addition, after the umbrella is opened, the joints should not feel loose and fluttering when shaking.
5. Open umbrella test: A. Remove the umbrella cover, open the buckle, and shake the umbrella surface to make it open evenly. B. Push up on the button of the umbrella handle (be careful not to hold down the button) until the top of the umbrella is locked. After it is opened, shake the umbrella to see if it is firm.
6. Umbrella test: A, Automatic umbrella hand at the button of the umbrella handle, gently press, the umbrella is closed. Press the switch button of the manual umbrella, and pull the umbrella gently to snap the umbrella to the switch position.
B. After folding, close the umbrella bone to the umbrella holder, then straighten the leaves one by one along the crease, and close the umbrella page in the same direction to find the umbrella buckle. The strap on the umbrella buckle can be tightened and rotated around the umbrella leaf once to buckle. When putting the umbrella cover, turn it clockwise downwards, and then you can easily insert the umbrella cover.
(1) cartons and cartons (or color boxes) clean, neat, no damp, extrusion deformation, dirty, marked clearly;
(2) foam packaging size appropriate, clean, and no deformation, moisture, damage and other defects;
(3) the production date of the carton is clearly marked;
(4) whether the packaging method is reasonable and firm;
(5) whether the bar code is clear;
(6) whether the machine installed in the box is consistent with the packaging; Instruction manual, certificate of conformity and legible print.
2. Check the product sticker
(1) all the stickers are in the right position, no wrong paste, paste, no bubble, warped edge. (the test can be wiped with a cloth soaked in alcohol.)
(2) all the stickers printed word is clear and neat, the design, logo, color is clear and correct;
(3) whether the product name, power, voltage and frequency on the nameplate are correct;
(4) product components whether there are scratches, black spots, burrs, watermarks, stains and other bad phenomena, color is correct;
(5) the position of each accessory is close, leaving a gap of no more than 1mm; Whether the switch button is flexible, whether the handlebar assembly is firm, the position is appropriate.
3. Product performance testing
(1) high voltage test: AC 110/220v 3.1kv /1MIN 0.5ma;
(2) switch test: power test, continuous switch more than 10 times, should be able to work normally;
(3) power test: under standard voltage, +5% ~ -10% of rated power is the normal operating range, otherwise, it is unqualified product;
(4) start the test: start the test from the low position first, and start the machine immediately after the switch;
(5) wind blockage test (prevent fan from stopping)
(6) test of electric heating wire: under normal operation, the heating wire should not redness obviously (wind blocking for 1-2 seconds). When working at 15% above the rated power, it should work normally for at least 30 minutes. Protection switch can not be premature protection, plastic shell deformation;
(7) noise testing: use the noise tester (A) to measure the weight.
(8) life test: under normal voltage, it can work continuously for at least 200 hours (factory standard). During 4-6 hours of aging test, the power cord shall not be obviously hot, the plastic shall not be deformed, and the protection switch shall not take off (except under special circumstances);
(9) cold wind test
(10) hot air test
(11) drop test
(12) power cord test: pull the power cord with a force of 15 kilograms (KG) without loosening or disconnecting the power cord. The power cord should be normally energized without any bad contact
(13) appearance test (visual test): all switches are flexible, not stuck or scratched. No burr, scratch, crack, release, etc. The heating wire should not be too close to the net cover;
