JB/T 9936.3-1999 This standard is a revision of ZB J52 005.3-89 "Technical conditions for flat-nose pliers for tilting machines". During the revision, only editorial changes were made according to relevant regulations, and the main technical content remained unchanged. This standard is part of the JB/T 9936 "Flat-nose pliers for tilting machines" series of standards, which includes the following three parts: JB/T 9936.1-1999 Parameters of flat-nose pliers for tilting machines JB/T 9936.2-1999 Accuracy inspection of flat-nose pliers for tilting machines JB/T 9936.3-1999 Technical conditions for flat-nose pliers for tilting machines This standard specifies the technical requirements, test methods, inspection rules, packaging and marking of flat-nose pliers for tilting machines. This standard applies to flat-nose pliers for tilting machines. This standard was first issued in March 1989. JB/T 9936.3-1999 Technical requirements for flat-nose pliers for tilting machines JB/T9936.3-1999 Standard download decompression password: www.bzxz.net

ICS 25.060.20
Mechanical Industry Standard of the People's Republic of China
JB/T9936.1~9936.3-1999
Flat-nose pliers for tilting machines
Published on 1999-05-20
National Urban Construction North Bureau
2000-01-01 Implementation
JB/T9936.3—1999
This standard is a revision of 2B152005.3—89 (Technical Specifications for Flat-nose Pliers for Tilting Machines). The original version was formulated based on the market demand for flat-nose pliers for tilting machines and the user's requirements. Its technical content still meets the current level of science and technology and is suitable for production and use. This standard is consistent with the technical content of 152005.389 in July, and is only re-edited according to relevant regulations. The standard is part of the standard for flat-nose pliers for tilting machines. B door 936 is used in flat-nose pliers for tilting machines. The following parts are included under the general title of "Flat Pliers for Tilting Machines": Part 1 (3B9961): Parameters: Part 2 (ie ID/T9936.2): ​​Test for strength; Part 3 (ie ID/T9936.3) Technical conditions This standard replaces ZB352005.3-1999 from the date of implementation. This standard is proposed by the National Technical Committee for Standardization of Solid Metal Cutting Machines. The National Technical Committee for Standardization of Solid Metal Cutting Machines, Machine Accessories Branch, is responsible for the maintenance of this standard. The responsible unit is Nanjing Machine Tool Accessories Factory. This standard was first issued in March 1989. National Machinery Industry Standard of the People's Republic of China Technical Conditions for Flat Pliers for Tilting Machines FBT9936.3-1999, replacing ZIJ32 005389
This standard specifies the technical requirements, test cavity force, inspection rules, packaging and marking of semi-twisted pliers for wide-angle machines. This standard applies to tilting and twisting pliers!
2 Referenced standards
The provisions contained in the following standards become the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid: All standards will be revised. All parties using this standard should consider the feasibility of using the following new versions. 988
GB/T94391988
JB/T2329J996
JR/T32071991
JR.T 9935-1999
JR.T 9931.2--1999
3 Technical requirements and test methods
Technical conditions for high-quality steel
Iron parts
Machine tool pliers
General technical conditions for machine tool accessory product packaging Abbreviation of random technical documents of machine tool accessories
Machine tool flat-nose pliers
Main parts should be made of materials with performance not lower than that specified in the table. Table!
Parts name
Station office design
FH120) (4T 4434)
H[200 (G8/T 9439)
HT200(GE/T 9439
HR00 (GB 9439
Zero-strength multi-purpose
HT360（GB/T9439)
45 t R:T 690;
3.1 The parts to be treated shall not have cracks, pores, one-eye, sieve holes, clamps, cold spots and other defects: For those that do not affect the quality of use and appearance, the parts shall be repaired according to relevant regulations.
3,3 The sand and adhesive on the casting shall be carefully removed, the roughness shall be removed, the material shall be flat, the bone joints shall be flat, the surface of the special parts shall be flat: no oil filling, no paint on the outer surface, 3.411 gasket, the standard machine head shall not be clean, and the hardness of the parts shall be reduced: the test force is 48.-53H, the support force of the head shall not be less than 40HR and the parts shall be rectified.
3.5 The movable needle mouth is light and flexible, without belt phenomenon. When the cutter moves, the force on the required part shall not be less than 16. 3.6 The reverse upper weight of the end rod shall not exceed 45%. Approved by Industrial Machinery City on May 20, 1999, and implemented on January 20, 2001.
3.7 Small tightening test
JB/T36.31999
3.7.1 When the force shown in Table 2 is applied to the screw head, all parts shall not be damaged, and the clamping force generated between the clamp 1! 1 shall not be less than the value specified in Table 2.
Tightening force F.
Permanent tension force M.
Clamping force…,
Tightening force short M
3.7.2 The tightening force test method shall be in accordance with the provisions of 5.3 in JB23291996. Other equivalent methods may be used. 3.7.3 After the test, the accuracy shall be re-inspected in accordance with JR/T9936.2 and the test shall be qualified. 200
3.7.4, when the quality of batch production is determined, the tightness test is allowed to be sampled, and the inspection quantity shall not be less than 1% of each batch (not less than one unit). 3. The surface of the parts shall not have sharp edges and points (except for special provisions), and shall not have rust, burrs, magnetism, scratches and other defects. 3.9 When the two jaws are fitted, the misalignment of the top surface and the cutting surface shall not be greater than 0.1mm. 3.10 The scale lines, numbers and marks on the parts shall be accurate, evenly hooked and clear. 4 Inspection and polishing
Product inspection is divided into factory inspection and type inspection. 4.1 Factory inspection
Products shall be inspected and qualified before leaving the factory
The factory inspection items shall include: precision inspection, appearance quality, coating and anti-rust, packaging and compatibility, etc. 4.2 Type inspectionbzxZ.net
4.2.1 Type inspection shall be carried out in any of the following cases: a) Trial type identification of new products or products transferred to other factories; b) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; d) During production, within the prescribed period:
When the national quality supervision agency proposes the requirement for type inspection, 4.2.2 In addition to the factory inspection items, the type inspection items shall also include a comprehensive inspection of product materials and heat treatment, etc. 5 Packaging and marking
5.1 The product shall be marked with the scientific name, product type, name and export number JB/T 9936.31999 in a conspicuous position. 5.2 The packaging of the product shall comply with the regulations of B3207. 5.3 Technical documents shall include: instruction manual, certificate of conformity, packing list, and the preparation method shall comply with the provisions of T9935.
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