Some standard content:
Light Industry Standard of the People's Republic of China
Mechanical Pendulum Clock
1 Subject Content and Scope of Application
QB/T 1536 1992
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of mechanical pendulum clocks. This standard is applicable to mechanical pendulum clocks with mechanical energy as the original power (hereinafter referred to as "pendulum clocks"). 2 Reference Standards
GB/T2828 Batch Inspection Count Sampling Procedure and Sampling Table (Applicable to Inspection of Continuous Batch) GB/T2829 Periodic Inspection Count Sampling Procedure and Sampling Table (Applicable to Inspection of Stability of Production Process) GB/T6875 Clock Mechanical Calendar Mechanism
QB/T1535 Mechanical Alarm Clock
Product Classification
Product classification, grade and basic parameters shall comply with the requirements of Table 1. Table 1
Winding (hammer)
Technical requirements
Continued working time after full winding (hammer)
Spring type
Heavy hammer type
Spring type
Heavy hammer type
Spring type
Heavy hammer type
4.1 The continued working time, average daily difference, daily deviation and time interval after full winding (hammer) shall comply with the provisions of Table 1. 4.2 Reliability in use
After the pendulum clock is fully wound (hammer), it shall operate normally within the winding cycle specified in Table 1, and shall not stop running or stop reporting. 4.3 Working temperature
Ministry of Light Industry of the People's Republic of China approved 228 on July 6, 1992
Quasi-thermal network
American standard thief room
Time
1,1/A;
No time
1993-03-01 implementation
QB/T15361992
Pendulum clocks should not stop running within a temperature range of 10 to 45°C. 4.4 Daily adjustment
The adjustable range of the daily adjustment shall not be less than 10 minutes, and the two-way adjustment capacity of the daily adjustment shall not be less than 4 minutes. 4.5 Hour and minute hand coordination difference
The indication positions of the hour and minute hands shall be coordinated with each other. When the center position of the hour mark on the push clock face is at the hour mark, the deviation between the minute hand and the center position of the 12" hour mark is ±6 minutes.
4.6 Time signal deviation
When the hour mark is at the hour mark, the deviation between the minute hand and the center position of the 12" hour mark is ±1/2 minutes. The number of time signaled by the dot should be consistent with the time indicated by the hour hand. 4.7 Time interval of dot signal
When signaling, the time interval between two adjacent dot signals should meet the following requirements: a. Small pendulum clock: 1~2s;
b. Large pendulum clock and floor clock: 1.5~2.5s. 4.8 Time signal sound quality
The time signal volume should be moderate and the sound quality should be harmonious. No mute is allowed. The time signal melody should be accurate. 4.9 Fixation of movement and clock case
The fixation of the movement and clock case should be reliable. The winding shaft and hole should be concentric and no obvious deviation is allowed. 4.10 Appearance requirements
4.10.1 The surface of the clock shell should be flat and smooth. At room temperature, the paint layer should be firmly bonded. No bubbling, cracking, peeling, obvious scratches, spots and gaps are allowed. The clock shell structure should not have obvious deformation and cracking at room temperature. 4.10.2 The clock face should be clear, and the trademark and various symbols should be obvious and complete, meeting the design requirements. No obvious appearance defects are allowed, and the clock face should not be obviously skewed.
4.10.3 The clock glass should be clean and transparent, and there should be no obvious defects that hinder reading and affect the appearance. 4.10.4 The surface plating and coating should have good anti-corrosion performance and bonding strength. 4.11 Pendulum clocks with calendar mechanisms should comply with the provisions of GB/T6875 in addition to complying with this standard. 5 Test method
5.1 Test environment and instruments
5.1.1 The pendulum clock must be tested in the working position, the test temperature is 20±5℃, and the relative humidity is 60%~80%. 5.1.2 The standard push clock used in the average daily difference and daily deviation test is a quartz clock of not less than 0.5s level, and the stopwatch of the first-class quality level is used in the time interval test.
5.1.3 The temperature error of the high and low temperature box is not more than ±2℃. 5.2 Reliability of use and continued working time after full stroke After the pendulum clock is fully stroked (hammered), it is placed firmly in its working position, and the pendulum is pushed to make it run. During the continued working time, it should be able to tell time normally. From the start of operation to automatic stop, the results should comply with the provisions of Article 4.2 and Table 1. 5.3 Average daily difference and daily deviation
5.3.1 According to the level and stroke (hammer) cycle in Table 1. 5.3.2 After the pendulum clock is fully wound (hammered), place it firmly in its working position, push the pendulum to make it run, and record the correction value of the pendulum clock and the standard clock after 2 hours. 5.3.3 During the winding (hammering) cycle, record the daily difference of the pendulum clock every 24 hours, and then calculate the average daily difference and daily deviation according to the following formula. The result should meet the requirements in Table 1.
The average daily difference (M) is calculated according to formula (1): a.
Quasi-net
QB/T 1536—1992
Where: ML—The accumulated error is the error value of n days minus the correction value, s/d; the number of days of travel during the winding cycle, d.
Daily deviation (M,) is calculated according to formula (2):
Ma = Ma: - M
i= 1,2.3,..m
Where: Mr—daily deviation on the ith day, s/d; Mai——daily deviation on the ith day, s/d.
5.3.4 Daily deviations M,~M shall all comply with the provisions in Table 1. 5.3.5 When the average daily deviation (M) exceeds the grade specified in Table 1, it may be adjusted according to the method specified in Article 5.5. 5.4 Working temperature
Put the pendulum clock in a test box at a temperature of 45℃ and keep it warm for 6 hours, then take it out and place it at room temperature for more than 2 hours, then put it in a test box at a temperature of -10℃ and keep it warm for 6 hours before taking it out. The result shall comply with the provisions of Article 4.3. 5.5 Daily difference adjustment
Adjust by adjusting the pendulum adjustment nut. After the average daily difference (M) is measured, adjust the pendulum adjustment nut to the upper and lower limit positions, and then measure the daily difference (Mup, M), and calculate the adjustment range and adjustment capacity according to the following formula. The calculation result should meet the requirements of Article 4.4. Adjustment range:
IMup|+[Mr|≥10 min
Adjustment capacity:
IM-MI≥4 min
jM-Mr/≥4 min
5.6 Hour and minute hand coordination error
Indicate the hour hand at the center of "6" and "12" respectively, and visually observe the deviation of the minute hand at the center of the \12\ hour symbol. The result should meet the requirements of Article 4.5.
5.7 Timing Deviation
Turn the minute hand around any number of times, then turn the minute hand forward in sections according to the time interval of the hourly time, and start visually inspecting the indicated time and listening to the number of time indications from the second turn. The result should comply with the provisions of Article 4.6. 5.8 Time Interval of Dotting
Use a stopwatch to measure the time interval of 10 consecutive dottings, and thereby obtain the average time interval between two adjacent dottings. The result should comply with the provisions of Article 4.7.
5.9 Sound Quality of Time
Use human hearing to inspect the sound quality and melody of the time indication, and it should comply with the provisions of Article 4.8. 5.10 Fixation of Movement and Clock Housing
Wind the clock with a key, check the reliability of the fixation of the movement and clock housing by hand, and visually inspect the axis and hole of the winding shaft. The result should comply with the provisions of Articles 4 and 9.
5.11 Appearance
Use normal natural light indoors (use 40W fluorescent lamps for lighting in dark weather), with a viewing distance of 0.4m, and normal vision for visual inspection. The results should comply with the provisions of 4.10.1, 4.10.2, and 4.10.3. 5.12 Surface plating and coating
The corrosion resistance and bonding strength tests of surface plating and coating in appearance shall be carried out in accordance with the provisions of 5.8.3 to 5.8.8 of QB/T1535, and the test results shall comply with the provisions of 4.10.4. 5.13 For pendulum clocks with calendar mechanisms, the test method for the performance of the calendar mechanism shall be in accordance with the provisions of 3.1 to 3.6 of GB/T6875. 230
Responsibilities
6 Inspection rules
6.1 Factory inspection
QB/T 1536-1992
6.1.1 Factory inspection shall be carried out in accordance with GB/T2828, and the classification of non-conformities, inspection items, sampling plan, inspection level and acceptable quality level (AQL) are shown in Table 2.
Non-conformities
Continued running time
Continued time telling
Average daily difference
Daily deviation
Coordination difference between hour and minute hands
Time telling sound quality
Time telling deviation
Strike time interval
Fixation of movement and clock case
Clock glass
Inspection items
Applicable clauses
4. 10. 1,5.11
4. 10. 2,5. 11
4.10.3.5.11
6.1.2 According to the specified inspection items, check the samples one by one, and allow the ordering party to inspect the continuous running time, continuous time reporting, average daily difference and daily deviation during the product manufacturing process.
6.1.3 According to the sample inspection results, if the number of unqualified products in the sample is less than or equal to the qualified judgment number A., then the batch is judged to be a qualified batch; if the number of unqualified products in the sample is greater than or equal to the unqualified judgment number R., then the batch is judged to be an unqualified batch. 6.1.4 Batches that fail the factory inspection should be returned to the manufacturer for processing. 6.2 Type inspection
6.2.1 Samples for type inspection shall be taken from qualified batches of factory inspection. Type inspection shall be carried out in accordance with GB/T2829. The unqualified classification, inspection items, sampling plan, discrimination level and unqualified quality level are shown in Table 3. Table 3
Unqualified
Continued running time
Continued time telling
Average daily difference
Daily error
Inspection items
Applicable terms
Unqualified
Coordination difference between hour and minute hands
Time telling sound quality
Time telling deviation
Time interval
Daily error adjustment
Inspection items
Fixation of movement and housing
Working temperature
Bonding strength of plating and coating
Corrosion resistance of plating and coating
QB/ T15361992
Continued Table 3
「Judgment
Applicable clauses
4.10,5.11
4.10,5.12
6.2.2 If the type inspection fails, the product shall be stopped from delivery and shall be delivered only after rectification until the type inspection passes. The type inspection cycle is generally once a year. Type inspection shall be carried out in any of the following circumstances. 6.2.3bzxz.net
When a new product is put into production or an old product is switched to another product;
When there are major changes in the design, structure, process, or material of the product: Stop production of the product for one year. c.
When the national quality supervision agency proposes a type inspection. d.
Marking, packaging, transportation, storage
7.1 Marking
7.1.1 Product marking
The basic content of product marking includes:
Manufacturer name or place of origin;
b. Product code:
Trademark:
Winding (hammer) cycle;
Manufacturing date or production batch number.
7.1.2 Packaging marking
7.1.2.1 Packaging box marking
|tt||The basic content of the packaging box mark is the same as the basic content of the product mark, and should also include: production license number;
b. Product standard name and code.
7.1.2.2 Packaging box mark
The basic content of the packaging box mark includes:
Manufacturer name or place of origin;
b. Product name or product code;
c. Receiving and shipping marks;
d. Words or marks such as "fragile" and "afraid of moisture". 7.2 Packaging
Standard search network
Standard materials and labor costs
QB/T 1536--1992
Each pendulum clock and all accessories should be packed in a box with reliable positioning and anti-trap measures, and the following documents should be carried in the box: a product certificate, the content of which should include the product name, manufacturer name, standard code and name, inspector code, inspection date, etc.
b. A product instruction manual.
Several boxes should be packed in a packing box with moisture-proof and anti-corrosion measures, and the gross weight of the packing box shall not exceed 50kg (except for containers, large clocks and special requirements of foreign merchants).
7.3 Transportation
The product should be handled with care during transportation, avoiding rain and severe vibration. 7.4 Storage
Storage place: warehouse;
b. Storage conditions: temperature is 0-40, relative humidity is not more than 75%, and the warehouse should be ventilated and dry. The product is not allowed to be stored together with items that produce corrosive gases;
c. Storage requirements: Can be placed alone or in stacks, but other heavy objects are not allowed to be piled on top of the packaging box. Additional notes:
This standard was proposed by the Quality Standards Promotion Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Clock and Watch Standardization Center. This standard was drafted by the Shanghai China Clock Factory. The main drafters of this standard are Chen Maoli, Zhou Weihua, and Qian Lianying. This standard refers to the former Soviet national standard r0CT703-1976 General Technical Requirements for Pendulum-Type Mechanical Wall Clocks (August 1987 edition, valid until January 1, 1993). 233
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Road Source Device4 Storage
Storage place: Inventory;
b. Storage conditions: Temperature 0 ~ 40, relative humidity not more than 75%, the warehouse should be ventilated and dry. The product is not allowed to be stored together with items that produce corrosive gases;
c. Storage requirements: It can be placed alone or stacked, but other heavy objects are not allowed to be stacked on the packaging box. Additional instructions:
This standard is proposed by the Quality Standards Promotion Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Clock and Watch Standardization Center. This standard is drafted by Shanghai China Clock Factory. The main drafters of this standard are Chen Maoli, Zhou Weihua, and Qian Lianying. This standard refers to the former Soviet national standard r0CT703-1976 General Technical Requirements for Pendulum Mechanical Wall Clocks (August 1987 edition, valid until January 1, 1993). 233
Standard Network Changer
Road Source Device4 Storage
Storage place: Inventory;
b. Storage conditions: Temperature 0 ~ 40, relative humidity not more than 75%, the warehouse should be ventilated and dry. The product is not allowed to be stored together with items that produce corrosive gases;
c. Storage requirements: It can be placed alone or stacked, but other heavy objects are not allowed to be stacked on the packaging box. Additional instructions:
This standard is proposed by the Quality Standards Promotion Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Clock and Watch Standardization Center. This standard is drafted by Shanghai China Clock Factory. The main drafters of this standard are Chen Maoli, Zhou Weihua, and Qian Lianying. This standard refers to the former Soviet national standard r0CT703-1976 General Technical Requirements for Pendulum Mechanical Wall Clocks (August 1987 edition, valid until January 1, 1993). 233
Standard Network Changer
Road Source Device
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