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Production method for improving thread ring gauge manufacturing efficiency

A technology of manufacturing efficiency and thread ring gauge, which is applied in the field of thread measuring tool manufacturing technology, can solve the problems of many grinding hours, complicated process, high scrap rate, etc., and achieve the effects of reducing manufacturing cost, reducing heat load, and moderate cutting force

Inactive Publication Date: 2014-12-03
CHENGDU HENGTONG ZHAOYE PRECISION MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to consideration of the deformation of the thread after quenching, a certain amount of grinding must be reserved for the size of the thread in the step of turning the thread. In the prior art, the grinding after quenching is mostly completed by the fitter using multi-stage grinding rods. In the above operations , complex process, many tooling, many grinding hours, high scrap rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The production method that is beneficial to the manufacturing efficiency of the threaded ring gauge includes the steps of blank blanking, thread turning, quenching and grinding, the quenching step is arranged before the thread turning step, and the turning tool used in the thread turning step is a 726 hard alloy turning tool, said The rake angle of the 726 carbide turning tool is between 0° and -8°, the back angle of the tool is between 8° and 10°, and the arc range of the tool nose is between R0.06-R0.12mm , the turning speed of the turning tool in the thread turning step is 15-20m / min, and the feeding of the turning tool is repeated multi-step step-by-step feeding, and each step-by-step feeding includes multiple times where the amount of cutting tool gradually decreases. Infeed, and the amount of infeed of the first knife for multiple infeeds is not greater than 0.03mm.

[0018] In the prior art, there are many cutters for cutting hardened steel or high-hardness steel...

Embodiment 2

[0021] This embodiment is further limited on the basis of Example 1: in order to ensure that the metallographic structure of the tool after quenching can be transformed into martensite or lower bainite structure, which is beneficial to the hardness and wear resistance of the tool, the quenching is After heating the blank to 1025-1050°C and keeping it warm for not less than 10 minutes, it is completed by oil cooling.

[0022] In order to uniform the particle size and dispersion of carbides, a spheroidizing annealing step is also included between the quenching and thread turning steps.

[0023] Further, the spheroidizing annealing step is cyclic spheroidizing annealing at 760-780°C and 650-670°C. Using the above spheroidizing annealing steps, the morphology and distribution of carbides can be improved when the number of cycles is generally not more than 4 times. Compared with the isothermal spheroidizing annealing used in the prior art, the cyclic spheroidizing annealing tim...

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Abstract

The invention discloses a production method for improving thread ring gauge manufacturing efficiency, which includes the steps of blank feeding, thread cutting, quenching and grinding. Quenching is followed by thread cutting; a 726 hard alloy turning tool is adopted for thread cutting; the angle of the cutting edge of the 726 hard alloy turning tool ranges from 0 degree to 8 degrees; the tool clearance of the 726 hard alloy turning tool ranges from 8 degrees to 10 degrees; the circular profile of the knife point of the 726 hard alloy turning tool ranges from R0.06 to R0.12 mm; in the step of thread cutting, the turning speed of the turning tool ranges from 15 to 20 m / min; the feeding of the turning tool is performed repetitively in a step-by-step manner; each substep of feeding includes multiple feedings with a gradually decreased feed amount; the first feed amount in multiple feedings is no larger than 0.03 mm. The production method for improving thread ring gauge manufacturing efficiency is simple in process, not only improves the thread ring gauge manufacturing efficiency and reduces the manufacturing cost, but also is conductive to improving the product quality of thread ring gauges and extending the service life of the turning tool.

Description

technical field [0001] The invention relates to the field of thread measuring tool manufacturing technology, in particular to a production method that is beneficial to the manufacturing efficiency of thread ring gauges. Background technique [0002] The manufacturing method of the threaded ring gauge in the prior art adopts the production process of first turning the thread and then quenching, followed by thread grinding after quenching. Due to consideration of the deformation of the thread after quenching, a certain amount of grinding must be reserved for the size of the thread in the step of turning the thread. In the prior art, the grinding after quenching is mostly completed by the fitter using multi-stage grinding rods. In the above operations , complex process, many tooling, many grinding hours, high scrap rate. [0003] Reversing the steps of quenching and thread turning can effectively reduce the above-mentioned size reserved parameters, that is, to reduce the proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00G01B3/34
Inventor 吴光武
Owner CHENGDU HENGTONG ZHAOYE PRECISION MACHINERY