This standard specifies the test method for the starting torque of sewing machine heads. This standard applies to the starting torque test of household sewing machines and GC, GN, GK industrial sewing machine heads (hereinafter referred to as "heads"). Other types of heads can also be used as a reference. QB/T 2252-1996 Sewing machine head starting torque test method QB/T2252-1996 Standard download decompression password: www.bzxz.net

Light Industry Industry Standard of the People's Republic of China
QB/T 2251 ~2257--96
Sewing machine
1996-11-15 Issued
China Light Industry Federation Issued
1997-07-01 Implementation
Light Industry Industry Standard of the People's Republic of China
Sewing machine
Test method of grinding torque of machine head
QB/T:2252--96
This standard is a revision of BY7023--6S
The following are the main technical changes in this version: First, the dynamic torque is the dynamic torque:
! GK type industrial sewing machine head:
-2 Add new content in the test instrument:
3, 1 Normal cutting load state is changed to empty test start state: 3.3 Remove the wheel that is hooked on the cloth, otherwise it will not be removed and replaced by the wheel that falls on the main body. 4 Add new content in the test method,
This standard is proposed by the Quality and Standards Department of China Light Industry Association. This standard is under the jurisdiction of the National Sewing Machine Standardization Center. The drafting units of this standard are Shanghai Sewing Machine Research Institute, Shanghai Key Correction Machine Factory No. 1, and Shanghai Xiemu Sewing Machine Factory. The main drafters of this standard are: Nulashu, Li Meimei, and Chen Jialian. Since the implementation of this standard, the professional standard B17-Method for optimizing the automatic torque control of the sewing machine head 3 issued by the former Ministry of Light Industry will be invalid.
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Light Industry Standard of the People's Republic of China
Sewing Machine
Test Method of Machine Head Starting Torque
This standard specifies the test method of the starting torque of the sewing machine head. QR/T 225z—96
This standard is not applicable to + flow sewing machine heads and, K-type industrial warp machine heads (hereinafter referred to as "or" for starting torque test, and its type of batch heads can also be used for reference. 2 Reference standards
A standard contains provisions that have become the text of this standard through the use of this standard center: At the time of publication of the standard, the release shown is valid, and in the international process you will set it, and the service party of this standard should explore the new version of the car section with the lower ring elasticity.
Q21/30.4-94 Sewing technology
The standard adopts the following definition
The torque when the starter or machine starts.
4 Test speed
41 adopts the degree of reduction G1 . Product, the output pin speed is ?/m above % of the whole machine starting torque tester or other instruments.
4.2 White start recording section,
4, & tester calibration code machine calibration (scale) disk, 5 test pain parts
5.1 Xie peach head is in the empty test makeup state (according to the mouth/T$4 in! .1): There is green, feeding negative price installation time should be time.
5.2 Each moving matching part is lubricated (take the lubricant brand received with the factory): and dial the product standard to set the high speed continuous running, the home machine is, the industrial sewing machine is min, the running table is it. 6.8 Remove the pulley or the standard installed on the main shaft. China Light Industry General Association 1996-11-15 approved 1890701 actual sharing
6 test party
OA/1 2262. -*6
6.1 Use the control code and the stop (ratio measuring scale) to test the automatic recorder. 8,2 Adjust the output of the microcomputer to the shaft, and use the precision shaft to clean the shaft. 6,3 The test is taken as the starting point of the test. 6.4! Dynamic torque tester, 32r/1 mouth rotation, continuous rotation of 4 revolutions is a test cycle, a total of one cycle. The arithmetic average value of the maximum cycle in the three fixed periods is the starting test result value. The time between each test period is the calculation unit of the test result. The test result is calculated in units of
1 and
T. 2 The test result is then calculated as
T=Timax Tamx+Tamas
Where T-
Start converter test result:
The maximum indication of the first test cycle:
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. Test result record
The maximum indication of the second test cycle:
The maximum indication of the first test cycle.
? Test head and:
b) Manufacturer name;bzxZ.net
e) Name and model of German mouse instrument:
d: Start distance test result value (attach the recorder record data if necessary): Date:
Thank the tester's name.
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