Some standard content:
Light Industry Standard of the People's Republic of China
Mechanical Alarm Clocks
Subject Content and Scope of Application
QB/T1535-
—1992
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of mechanical alarm clocks. This standard applies to mechanical alarm clocks with spring as power source and balance spring oscillation system that can sound the alarm at a predetermined time. 2 Reference standards
GB/T2828 Count sampling procedure and sampling table for batch inspection (applicable to inspection of continuous batches) GB/T2829 Count sampling procedure and sampling table for periodic inspection (applicable to inspection of production process stability) Corrosion resistance test method for metal coating and chemical treatment layer of light industrial products Neutral salt spray test (NSS) method GB 5938
GB5944
Evaluation of corrosion test results of metal coating of light industrial products GB/T6875 Clock mechanical calendar mechanism
ZBY11011 General technical conditions for coating of appearance parts of timekeeping instruments Spicy coating of metal appearance parts of clock 3 Product classification
3.1 Mechanical alarm clocks are divided into precision type and ordinary type according to their function, number of drills, escapement mechanism, product structure and manufacturing accuracy. 3.2 The basic parameters and main characteristics of precision type and ordinary type are specified in Table 1. Table 1
Precision type
Ordinary type
4Technical requirements
Winding cycle
Continuous running time
≥220
≥216
With box
With box or
Without box
Number of functional drills
≥15 drills
≥ drills
5 drills or
Manipulation mechanism|| tt||Fork-tile type catching
Pin type picking
Structural type
With periodic adjustment
With periodic adjustment
With periodic adjustment
With or without periodic adjustment
4.1 The alarm clock can work normally by adjusting the fast and slow needle within the external temperature range of 5 to 40℃, and shall not stop at -5℃. 4.2 The alarm clock is in the normal working position. The running time error, alarm time deviation and alarm lock range shall meet the requirements of Table 2 according to different types and grades. At the same time, the alarm spring should be relaxed after 12 hours. Table 2
Precision
Ordinary
Winding cycle
Daily error
Cumulative error
min/8d
Alarm deviation
Lock alarm range
10h30min
10h20min
10h30min
4.3 The center of the speed needle is from the center scale of the back bell, back cover or clock case to the end of the scale. The adjustment range of its daily error is: precision type ≥6 min: ordinary type ≥8 min.
4.4 The deviation of the center of the speed needle from the center line of the scale shall not exceed half of its limit position. 4.5 After winding the spring once, each type of alarm clock must sound at the specified time of alarm. According to different structures, the duration of the alarm is: double spring alarm clock ≥10 s; single spring alarm clock ≥7s. 4.6 During the duration of the alarm, the alarm stop device should be flexible and reliable. 4.7 The alarm must be of appropriate loudness.
4.8 The devices for winding, setting the hands, adjusting the alarm and adjusting the speed hand should be stable and reliable, and the tightness should be appropriate. 4.9 The hour and minute hand indications should be coordinated with each other. When the minute hand coincides with the scale 12 on the clock face, the deviation of the hour hand from the scale shall not exceed half a grid. When there is no minute scale on the clock face, the deviation of the hour hand shall not exceed the angle value equivalent to half a grid. 4.10 The movement and the shell should be fixed reliably, and no parts damage or missing are allowed in the whole machine. 4.11 Appearance parts
4.11.1 The clock face should be clear and have obvious and complete symbols. No obvious embossing and cracking are allowed, and there should be no obvious tilt and offset relative to the rotation center of the pointer during installation. 4.11.2 The clock glass must be clear and transparent, and no breakage or obvious looseness is allowed. Plastic appearance parts and wooden shells are not allowed to break, and the main surfaces should not have obvious defects that affect the appearance. 4.11.3
4.11.4 The outer surface should not have obvious defects that affect the appearance, and the plating and coating should have good corrosion resistance and bonding strength. 4.11.4.1 The plating should meet the 8th level of anti-corrosion specified in GB5944 (using the simple 10-level grading method) after the corrosion resistance test. The coating should meet the requirements of Article 1.4.1 of ZBY11011 after the corrosion resistance test. 4.11.4.2
4.11.4.3 The plating should not have peeling phenomenon at the edge of the plating after the grinding test. 4.11.4.4 The coating should not have peeling phenomenon after the blade cutting test. 4.11.4.5 The surface plating and coating of metal imitation gold parts should have good corrosion resistance and bonding strength. 4.11.4.6 The surface plating and coating of plastic imitation gold parts should have good bonding strength and coating hardness. 4.12 For alarm clocks with calendar mechanism, the technical requirements of the calendar mechanism shall comply with the provisions of Articles 2.2 to 2.5 of GB/T6875. 5 Test method
5.1 Test conditions and instrument accuracy
5.1.1 The alarm clock shall be tested at the working position, the test temperature shall be 18~25℃, and the relative humidity shall be 55%~75%. 219
Standard dialing network NAV
Use one way, etc.
QB/T1535---1992
5.1.2 The standard push clock used in the alarm clock daily error test is a 0.5s grade quartz clock, and the alarm clock alarm test uses a mechanical stopwatch with a first-class quality grade and a second hand jump value of 0.1s.
5.1.3 The temperature error of the high temperature and low temperature test chambers shall not exceed ±2℃. 5.2 Test of time error and deviation of the speed hand from the center After the alarm clock is wound up and tested for 24 hours, it is rewound to test the time error. The alarm clock with one-day winding is checked for 24 hours, and the alarm clock with eight-day winding is checked for 192 hours. The reading of the alarm time is compared with the reading of the standard clock time. The inspection result shall comply with the provisions of Article 4.2. During this period, visually check the deviation of the speed hand from the center position. The result shall comply with the provisions of Article 4.4. 5.3 Alarm time test
Set the alarm hand or the alarm dial to any two points among 3, 6, 9, and 12, turn the pointer to make it alarm once each, and observe the deviation of the alarm time. At the same time, check the flexibility of the alarm stop device, the range of locking the alarm and the loudness of the alarm. The inspection result shall comply with the provisions of Articles 4.2.4.6.4.7. 5.4 Duration of time and alarm
5.4.1 Test from the moment of winding up the speed hand. The inspection result shall comply with the provisions of Article 3.2. 5.4.2 For a double-spring alarm clock, wind up the alarm spring while winding up the running spring. Check the alarm spring after 12 hours. The result should comply with the provisions of Article 4.2. 5.4.3 When testing a single-spring alarm clock, first put the alarm stop device in the alarm start position, then set the alarm start time to 1 hour after the hand time, then wind up the spring. Check that the alarm should sound after 1 hour. The result should comply with the provisions of Article 4.5. If necessary, the rear bell can be disassembled to observe the displacement of the alarm limit mechanism in the winding mechanism.
5.5 Alarm duration
Wind up the alarm spring for the second time, and use a stopwatch to measure the time period from alarm start to alarm stop. The result should comply with the provisions of Article 4.5. 5.6 Coordination error between hour hand and minute hand
When the hour hand indicates 6.12 o'clock, the deviation of the minute hand from 12 is not greater than 6 divisions. 5.7 Adjustment range of the speed needle
Move the speed needle so that its center moves from the center line of the scale to the left and right ends of the scale, measure the daily difference value, and check IM.-M" and "M.-Ml. The results should meet the requirements of Article 4.3. Among them, M. is the daily difference value when the center of the speed needle is at the center line of the scale (min); Mi is the daily difference value when the center of the speed needle is at the left end of the scale (min); M, is the daily difference value when the center of the speed needle is at the right end of the scale (min). 5.8 Appearance parts
5.8.1 Use normal natural light indoors (use indoor 40W fluorescent lighting in dark weather) and a distance of about 0.4m for visual inspection with normal vision. The results shall comply with the provisions of 4.11.1, 4.11.2, 4.11.3 and A2. 5.8.2 Shake the alarm clock by hand, the results shall comply with the provisions of 4.11.2. 5.8.3 The corrosion resistance test of the external surface coating shall be carried out in accordance with the test method specified in GB5938 and A3, the test cycle is 6h, and the test results shall comply with the provisions of 4.11.4.1.
5.8.4 The corrosion resistance test of the external surface coating (paint layer) shall be carried out in accordance with 2.2. The test method specified in Article 4 shall be used, and the results shall comply with Article 4 and Article 11.4.2.
5.8.5 Electroplated parts bonding strength test Use an aluminum oxide grinding wheel with a grit of 100 to 120, grind off part of the electroplated layer of the test piece at a grinding speed of 800 to 1000 m/min, and visually inspect the edge of the coating with normal vision. The results shall comply with Article 4.11.4.3. 5.8.6 The external surface coating (paint layer) bonding strength test shall be carried out according to the method specified in Article 2.3 of ZBY11011, and the results shall comply with Article 4.11.4.4.
5.8.7 The corrosion resistance and bonding strength test of metal imitation gold parts can be carried out according to Appendix B (supplement), and the results shall comply with Article 4.11.4.5.
5.8.8 The bonding strength and coating hardness test of plastic imitation gold parts can be carried out according to Appendix C (supplement), and the results shall comply with the provisions of 4.11.4.6.
5.9 Working temperature
Wound up the alarm clock, put it in a 40℃ test box for 4 hours after comparing it with the standard clock, take it out to measure the running time error, and place it at room temperature for at least 2 hours, then wind up the alarm clock again, put it in a 5℃ test box for 4 hours after comparing it with the standard clock, take it out to measure the running time error, and the result shall meet the requirements of 4.1.
QB/T1535-1992
Put the alarm clock in a room temperature for at least 2 hours, and then put it in a 5℃ test box for 4 hours after it is fully charged, and the result shall meet the requirements of 4.1. 5.10 Calendar mechanism
For alarm clocks with calendar mechanism, the test method for calendar mechanism performance shall be carried out in accordance with the provisions of Chapter 3 of GB6875. 5.11 Winding, hand setting and movement fixation are reliable. While carrying out the tests of 5.2, 5.3 and 5.7, check the winding, hand setting, alarm, speed hand adjustment devices and movement fixation are reliable. The results should comply with the provisions of 4.8 and 4.10.
6 Inspection rules
6.1 Finished alarm clocks shall be inspected by the technical supervision department of the manufacturer. 6.2 Factory inspection
6.2.1 Factory inspection shall be carried out in accordance with GB/T2828. When the commercial department accepts the finished clock, the temperature at the time of calibration at the place of production shall be used. Sampling inspection shall be carried out in accordance with Articles 3.2, 4.2, 4.4, 4.6 to 4.11.3 and A1.A2 of this standard. The unqualified categories, inspection items, inspection levels, sampling plans and qualified quality levels (AQL) are shown in Table 3.
Unqualified
No alarm
Inspection items
Broken and severely deformed exterior parts
Reliable fixing of movement, missing parts and damage Timing error
Alarm deviation
Poor coordination between hour and minute hands
Fast and slow hands deviate from the center
Alarm volume is appropriate
【Alarm lock range
Alarm stop is flexible and reliable
Winding, shuttle needle and alarm device are stable and reliable Clock glass is clear and no looseness is allowed
Surface quality of exterior parts
Applicable terms
4. 11.1,4. 11. 3,
4.11.4,A2
Qualified quality level
10,Single item 4.0
6.2.2 The formation of the inspection batch shall be carried out in accordance with Article 4.5 of GB/T2828. 6.2.3 After the samples are drawn, the samples shall be inspected one by one according to the specified inspection items. According to the inspection results, if the number of unqualified products in each test item is less than or equal to the qualified judgment number A., then the item is judged to be qualified. If the number of unqualified products found in the sample is greater than or equal to the unqualified judgment number R., then the test item is judged to be unqualified. When judging the entire batch of products, only if all the test items in Table 3 are qualified, the batch of products is qualified, otherwise the batch of products is unqualified.
6.2.4 The disposal of the inspection batch after the factory inspection shall be carried out in accordance with Article 4.12 of GB/T2828. 6.3 Type inspection
6.3.1 Type inspection shall be carried out in accordance with GB/T2829. The unqualified categories, inspection items, discrimination levels, sample insertion schemes and unqualified quality levels (RQL) are shown in Table 4.
UnqualifiedbZxz.net
No alarm
Inspection items
Broken and severely deformed exterior parts
Reliable fixing of movement, missing parts or damage Timing error
Alarm deviation
Poor coordination between hour and minute hands
Fast and slow hands deviate from the center
Appropriate alarm volume
Alarm locking range
Alarm stopping is flexible and reliable
Winding, setting and alarm devices are stable and reliable. Clock glass is clear and not allowed to be loose
Surface quality of exterior parts
Continued running time
Fast and slow hands adjustment range
Alarm duration
Working temperature
Plating, coating, metal damage Metal parts corrosion resistance QB/T1535—1992
Applicable clauses
4.1,4. 2,A1.1
Binding strength of inlay, coating, metal imitation gold parts and plastic imitation gold parts
Coating hardness of plastic imitation gold parts
4.11. 4. 6
Number of samples
Unqualified quality level
40 Single item 25
6.3.2 Samples for type inspection shall be drawn from a batch or batches manufactured in this cycle and qualified after factory inspection. 6.3.3 According to the results of sample inspection, for each test item, if the number of unqualified products in the sample is less than or equal to the qualified judgment number A., the item is judged to be qualified; if the number of unqualified products in the sample is greater than or equal to the unqualified judgment number R., the item is judged to be unqualified. When judging the entire batch of products, only if all the items in Table 4 are qualified can the product be judged to have passed the type inspection; otherwise, the product is judged to have passed the type inspection. If the product fails the type inspection,
6.3.4 The disposal after the type inspection shall be carried out in accordance with Article 4.12 of GB/T2829. 6.3.5 Samples that have passed the type inspection shall not be shipped as qualified products. 6.3.6 The type inspection cycle is generally one year, and type inspection should be carried out in any of the following situations. Trial production and identification of new products or old products transferred to the factory for production; a.
After the formal production, if there are major changes in structure, materials, and processes that may affect production; b.
Qualified technical network, dynamic name qualified porcelain material distribution room c. When resuming production after a long-term suspension of the product; QB/T 1535 — 1992
d. When the national quality supervision agency proposes a requirement for type inspection. 6.4 For mechanical alarm clocks with calendar mechanisms, the inspection rules for calendar mechanisms shall be in accordance with Chapter 4 of GB/T6875. The acceptable quality level (AQL) and unacceptable quality level (RQL) of each inspection item shall be agreed upon by the supply and demand parties. 7 Marking, packaging, transportation and storage
7.1 The clock face must have the manufacturer's trademark, and the alarm clock should have the manufacturer's place of origin or factory name, which can be marked in Chinese or foreign languages. Note: The marking of export branded products can be agreed upon by both parties. 7.2 The manufacturer's code or mark should be marked at an appropriate position on the movement: 7.3 For alarm clocks marked with the number of jewels, the actual number of working jewels used in the clock movement should be consistent with the number marked. 7.4 The direction of rotation of the hands, alarm and winding must be indicated by an arrow on the back bell, back cover or back of the clock case. The symbols of "10" (fast) and "1" (slow) should be marked at both ends of the notch of the speed adjustment device (speed needle). 7.5 Each alarm clock must be packed in a box, and the box should indicate the color of the clock shell and the specified article number. 7.6 The alarm clocks shipped out of the factory must have a product manual and inspection certificate issued by the manufacturer. The certificate should include the product name, manufacturer name, production license number, product standard number, inspector code, inspection date, etc. 7.7 The packaged alarm clocks must be packed in a box with moisture-proof and shock-proof measures. 7.8 Each box should be printed with the "fragile" and "moisture-proof" signs or words that cannot be erased according to national standards and the words specified by the commercial department.
7.9 During the transportation of products, they should be handled with care to avoid rain, moisture and squeezing. 7.10 The warehouse should be ventilated and dry to prevent the influence of rain, snow, moisture and corrosive gases. It is not allowed to be stored together with corrosive substances and materials. 7.11 The temperature of the storage warehouse is 0~～40℃, and the relative humidity should not be higher than 75%. 7.12 Special requirements for marking, packaging and transportation can be agreed upon by the supply and demand parties. 223
A Supplementary provisions for technical requirements of finished clocks
QB/T1535—1992
Appendix A
Supplementary provisions for technical requirements
(Supplement)
According to Article 6.2 of this standard, when the commercial department accepts and accepts, the following provisions shall be supplemented for the finished clocks. A1.1 Stopping provisions
a.If the running time is less than 24 hours, it will be treated as stopped. b. If the daily running time difference exceeds ±45 minutes, it will be treated as stopped. A1.2 Provisions for non-alarm
A1.2.1 According to the test method of Article 5.4.2 of this standard, the alarm spring of a double-spring alarm clock must be relaxed after 12 hours, otherwise it will be treated as non-alarm. A1.2.2 According to the test method of Article 5.4.3 of this standard, the alarm limit mechanism in the winding mechanism must be displaced, otherwise it will be treated as non-alarm. A2 Supplementary provisions for technical requirements of appearance parts
According to Article 6.2 of this standard, when the commercial department accepts and inspects, the appearance parts shall be carried out in accordance with the following requirements. A2.1 Clock glass
No cracks, blisters, scars, poison spots, ripples and handprints on the inner surface that obviously affect the appearance are allowed. A2.2 Clock face
No mold, oxidation, pitting, scars, stains, or discoloration that obviously affect the appearance are allowed. A2.3 Paint layer
It is not allowed to have exposed primer, paint peeling, blistering, and obvious scratches, pitting, and paint flow on the main surface. Note: The main surface refers to the visible parts of the front, top, left and right sides of the clock. A2.4 Electroplating layer
It is not allowed to have oxidation, peeling, blistering, and exposed primer. It is not allowed to have obvious scratches, pitting, discoloration, and cracks on the main surface. A2.5 Imitation gold parts
It is not allowed to have blistering, peeling, rust spots, and blackening on the surface. It is not allowed to have dust particles, paint particles, paint flow, burrs, pitting, discoloration, clouding, and serious scratches, discoloration, and roughness that obviously affect the appearance on the main surface. A2.6 Plastic shell
It is not allowed to have obvious cracks, bubbles, deformation, and burrs. It is not allowed to have miscellaneous spots, scars, and discoloration that obviously affect the appearance on the main surface. A2.7 Shell
Scars, scabs, and cracks that obviously affect the appearance are not allowed on the main surface (cracks are not counted at the interface on the back). The base should be stable. A3 Supplementary provisions for metal coating
A3.1 After the corrosion resistance test, the coating is not evaluated within 2mm of the punched edge. A3.2 The discoloration of the coating after the corrosion resistance test is not rated as rust points. A3.3 The counting method of the corrosion level adopts the simple 10-level grading method. The relationship between the number of rust points on the 1dm2 assessment area and the corrosion resistance level is shown in Table A1.
A3.3.1 If the assessment area is less than 1dm, it can be calculated based on the actual area or calculated by adding multiple parts to 1dm2. If the actual area is greater than 1dm2, the grade can be determined based on the number of rust points allowed per square decimeter. A3.3.2 When calculating rust points, rust points within 5mm apart should not be counted. A3.3.3 If any corrosion spot larger than 2.5 mm square appears in any area within the test area or more than 10224
行科执责任
corrosion spots appear within an area of 5 mm square, the specimen cannot be rated. Rust point number
>8～16
>16～32
>32～64
>64～128
>128~256
QB/T 1535 - 1992
Appendix B
Description of the test on the brain corrosion resistance and bonding strength of the metal imitation gold plating (coating) layer
(Supplement)
Test on the tumor corrosion resistance
B1.1 Artificial sweat corrosion resistance test
Corrosion resistance grade
a. Solution composition: 1000mL of distilled water, 5g of sodium chloride, 5mL of ammonia water, 6mL of glacial acetic acidb. Test steps: Dissolve sodium chloride in distilled water and heat it to 40±5℃, then add nitrogen water and keep it warm at 40±5℃. Immerse part (half) of the test piece in this solution and take it out after 1 hour. Then add glacial acetic acid and stir evenly. Keep it warm at 40±5℃. Continue to immerse the previous test piece in this solution and take it out after 1 hour. Wash and dry it, and visually inspect it with normal vision. B2 Bonding strength test
B2.1 Electroplating bonding strength test
Grinding test method: Use an aluminum oxide grinding wheel with a grit size of 100~120 to grind the plated piece at a speed of 800~～1000m/min, and visually inspect the edge of the coating with normal vision.
B2.2 Paint film bonding strength test
The test environment temperature should be higher than 10℃ when using the blade cutting method. Use a sharp blade to vertically cut 6 parallel cuts with a net length of 15~~20mm and a spacing of 1mm on the test piece, and then cut 6 parallel cuts with a length of 15~20mm and a spacing of 1mm perpendicular to it. The cuts must cut through the paint film layer. Finally, use a No. 1 brush to brush the cut part three times and visually inspect with normal vision. 225
Standard authorized search network wA.kzscso.com Name Category Standard Industry Information Wide. Free Download C1 Paint film bonding strength test
QB/T1535-1992
Appendix C
Test method for bonding strength of plastic imitation gold parts
and coating hardness
(Supplement)
Use a sharp blade to vertically cut 6 parallel cuts with a length of 15~20mm and a spacing of 2mm on the test piece, and then cut 6 parallel cuts with a length of 15~20mm and a spacing of 2mm perpendicular to it. The cuts must cut through the paint film layer. After cutting, stick it flat with a 24 mm wide transparent tape. Pull the tape once with your hand. The paint layer should not fall off with normal vision. C2 Hardness test of paint film
C2.1 Test instrument
Crimson pen scratch on film hardness (Figure C1).
Figure C1 Schematic diagram of pencil scratch tester for film hardness C2.2 Test method
Sharpen a 2H hardness pencil. The pencil core circle should not be damaged. The flattened end surface should be perpendicular to the axis of the pencil core. The test load is 500g. a.
10mm.
Scratch.
The sample should be flat and fixed. The pencil should be light when touching the surface (the pencil fixing position is shown in Figure C1). The sample should be moved steadily and slowly. The moving distance should be checked with a 3x magnifying glass using indoor natural light (in dark weather, use indoor 40W fluorescent lighting). The paint film layer is not allowed to be replaced by a standard screen
accuracy
Additional instructions:
This standard is proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Clock and Watch Standardization Center. QB/T1535
5—1992
This standard was drafted by Shanghai Clock Factory and Tianjin Clock and Watch Factory, and Guangzhou Clock and Watch Industry Science Research Institute of the Ministry of Light Industry participated. The main drafters of this standard are Sang Maoxing, Yang Yuwei, Shi Huizhu, Zhang Guoying, Ding Huiqun, Zhang Ping, Liu Naiquan, and Zhao Yanyu. This standard refers to the Soviet standard FOCT3145~-1989 "Technical Conditions for Mechanical Clocks with Signal Devices".
Standard authorization search network initial
Including standard industry material actual fee1 If the test area is less than 1dm2, it can be calculated based on the actual area or by adding multiple parts to 1dm2. If the actual area is greater than 1dm2, the grade can be determined based on the number of rust spots allowed per square decimeter. A3.3.2 When calculating rust spots, rust spots within 5mm apart should not be counted. A3.3.3 If any area within the test area has corrosion spots larger than 2.5mm square or more than 10224
行科执执
corrosion spots appear within a 5mm square area, the sample cannot be rated. Rust point number
>8～16
>16～32
>32～64
>64～128
>128~256
QB/T 1535 - 1992
Appendix B
Description of the test on the brain corrosion resistance and bonding strength of the metal imitation gold plating (coating) layer
(Supplement)
Test on the tumor corrosion resistance
B1.1 Artificial sweat corrosion resistance test
Corrosion resistance grade
a. Solution composition: 1000mL of distilled water, 5g of sodium chloride, 5mL of ammonia water, 6mL of glacial acetic acidb. Test steps: Dissolve sodium chloride in distilled water and heat it to 40±5℃, then add nitrogen water and keep it warm at 40±5℃. Immerse part (half) of the test piece in this solution and take it out after 1 hour. Then add glacial acetic acid and stir evenly. Keep it warm at 40±5℃. Continue to immerse the previous test piece in this solution and take it out after 1 hour. Wash and dry it, and visually inspect it with normal vision. B2 Bonding strength test
B2.1 Electroplating bonding strength test
Grinding test method: Use an aluminum oxide grinding wheel with a grit size of 100~120 to grind the plated piece at a speed of 800~～1000m/min, and visually inspect the edge of the coating with normal vision.
B2.2 Paint film bonding strength test
The test environment temperature should be higher than 10℃ when using the blade cutting method. Use a sharp blade to vertically cut 6 parallel cuts with a net length of 15~~20mm and a spacing of 1mm on the test piece, and then cut 6 parallel cuts with a length of 15~20mm and a spacing of 1mm perpendicular to it. The cuts must cut through the paint film layer. Finally, use a No. 1 brush to brush the cut part three times and visually inspect with normal vision. 225
Standard authorized search network wA.kzscso.com Name Category Standard Industry Information Wide. Free Download C1 Paint film bonding strength test
QB/T1535-1992
Appendix C
Test method for bonding strength of plastic imitation gold parts
and coating hardness
(Supplement)
Use a sharp blade to vertically cut 6 parallel cuts with a length of 15~20mm and a spacing of 2mm on the test piece, and then cut 6 parallel cuts with a length of 15~20mm and a spacing of 2mm perpendicular to it. The cuts must cut through the paint film layer. After cutting, stick it flat with a 24 mm wide transparent tape. Pull the tape once with your hand. The paint layer should not fall off with normal vision. C2 Hardness test of paint film
C2.1 Test instrument
Crimson pen scratch on film hardness (Figure C1).
Figure C1 Schematic diagram of pencil scratch tester for film hardness C2.2 Test method
Sharpen a 2H hardness pencil. The pencil core circle should not be damaged. The flattened end surface should be perpendicular to the axis of the pencil core. The test load is 500g. a.
10mm.
Scratch.
The sample should be flat and fixed. The pencil should be light when touching the surface (the pencil fixing position is shown in Figure C1). The sample should be moved steadily and slowly. The moving distance should be checked with a 3x magnifying glass using indoor natural light (in dark weather, use indoor 40W fluorescent lighting). The paint film layer is not allowed to be replaced by a standard screen
accuracy
Additional instructions:
This standard is proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Clock and Watch Standardization Center. QB/T1535
5—1992
This standard was drafted by Shanghai Clock Factory and Tianjin Clock and Watch Factory, and Guangzhou Clock and Watch Industry Science Research Institute of the Ministry of Light Industry participated. The main drafters of this standard are Sang Maoxing, Yang Yuwei, Shi Huizhu, Zhang Guoying, Ding Huiqun, Zhang Ping, Liu Naiquan, and Zhao Yanyu. This standard refers to the Soviet standard FOCT3145~-1989 "Technical Conditions for Mechanical Clocks with Signal Devices".
Standard authorization search network initial
Including standard industry material actual fee1 If the test area is less than 1dm2, it can be calculated based on the actual area or by adding multiple parts to 1dm2. If the actual area is greater than 1dm2, the grade can be determined based on the number of rust spots allowed per square decimeter. A3.3.2 When calculating rust spots, rust spots within 5mm apart should not be counted. A3.3.3 If any area within the test area has corrosion spots larger than 2.5mm square or more than 10224
行科执执
corrosion spots appear within a 5mm square area, the sample cannot be rated. Rust point number
>8～16
>16～32
>32～64
>64～128
>128~256
QB/T 1535 - 1992
Appendix B
Description of the test on the brain corrosion resistance and bonding strength of the metal imitation gold plating (coating) layer
(Supplement)
Test on the tumor corrosion resistance
B1.1 Artificial sweat corrosion resistance test
Corrosion resistance grade
a. Solution composition: 1000mL of distilled water, 5g of sodium chloride, 5mL of ammonia water, 6mL of glacial acetic acidb. Test steps: Dissolve sodium chloride in distilled water and heat it to 40±5℃, then add nitrogen water and keep it warm at 40±5℃. Immerse part (half) of the test piece in this solution and take it out after 1 hour. Then add glacial acetic acid and stir evenly. Keep it warm at 40±5℃. Continue to immerse the previous test piece in this solution and take it out after 1 hour. Wash and dry it, and visually inspect it with normal vision. B2 Bonding strength test
B2.1 Electroplating bonding strength test
Grinding test method: Use an aluminum oxide grinding wheel with a grit size of 100~120 to grind the plated piece at a speed of 800~～1000m/min, and visually inspect the edge of the coating with normal vision.
B2.2 Paint film bonding strength test
The test environment temperature should be higher than 10℃ when using the blade cutting method. Use a sharp blade to vertically cut 6 parallel cuts with a net length of 15~~20mm and a spacing of 1mm on the test piece, and then cut 6 parallel cuts with a length of 15~20mm and a spacing of 1mm perpendicular to it. The cuts must cut through the paint film layer. Finally, use a No. 1 brush to brush the cut part three times and visually inspect with normal vision. 225
Standard authorized search network wA.kzscso.com Name Category Standard Industry Information Wide. Free Download C1 Paint film bonding strength test
QB/T1535-1992
Appendix C
Test method for bonding strength of plastic imitation gold parts
and coating hardness
(Supplement)
Use a sharp blade to vertically cut 6 parallel cuts with a length of 15~20mm and a spacing of 2mm on the test piece, and then cut 6 parallel cuts with a length of 15~20mm and a spacing of 2mm perpendicular to it. The cuts must cut through the paint film layer. After cutting, stick it flat with a 24 mm wide transparent tape. Pull the tape once with your hand. The paint layer should not fall off with normal vision. C2 Hardness test of paint film
C2.1 Test instrument
Crimson pen scratch on film hardness (Figure C1).
Figure C1 Schematic diagram of pencil scratch tester for film hardness C2.2 Test method
Sharpen a 2H hardness pencil. The pencil core circle should not be damaged. The flattened end surface should be perpendicular to the axis of the pencil core. The test load is 500g. a.
10mm.
Scratch.
The sample should be flat and fixed. The pencil should be light when touching the surface (the pencil fixing position is shown in Figure C1). The sample should be moved steadily and slowly. The moving distance should be checked with a 3x magnifying glass using indoor natural light (in dark weather, use indoor 40W fluorescent lighting). The paint film layer is not allowed to be replaced by a standard screen
accuracy
Additional instructions:
This standard is proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Clock and Watch Standardization Center. QB/T1535
5—1992
This standard was drafted by Shanghai Clock Factory and Tianjin Clock and Watch Factory, and Guangzhou Clock and Watch Industry Science Research Institute of the Ministry of Light Industry participated. The main drafters of this standard are Sang Maoxing, Yang Yuwei, Shi Huizhu, Zhang Guoying, Ding Huiqun, Zhang Ping, Liu Naiquan, and Zhao Yanyu. This standard refers to the Soviet standard FOCT3145~-1989 "Technical Conditions for Mechanical Clocks with Signal Devices".
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