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Forming process of chipping scrapping slot bolt

A forming process and bolt technology, which is applied in the direction of bolts, threaded fasteners, connecting components, etc., can solve problems affecting thread accuracy, missing processes, and low production efficiency, so as to solve capacity bottlenecks, ensure product quality, and improve production efficiency. Effect

Inactive Publication Date: 2019-05-21
CHANGSHU CITY NO 2 STANDARD PARTS FACTORY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The processing method of the scraping groove is to use a milling machine for single milling, which has low production efficiency, poor product consistency, and prone to missing processes. The burrs generated during the milling process affect the thread accuracy, and the product quality is difficult to be effectively guaranteed.

Method used

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  • Forming process of chipping scrapping slot bolt
  • Forming process of chipping scrapping slot bolt
  • Forming process of chipping scrapping slot bolt

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Embodiment Construction

[0023] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0024] see Figure 1-6 , the embodiment of the present invention includes:

[0025] A forming process for scraper groove bolts, specifically comprising the following steps:

[0026] a. Cutting material: Calculate the cutting length (2) according to the bolt weight and material diameter (1);

[0027] b. Pre-upsetting: Pre-upsetting the required diameter (3) and height (6) of the head, and obtaining the first billet diameter (4) and first length (5) of the thread through one extrusion;

[0028] c. Upsetting ball: Upsetting the pre-upsetting head according to the required diameter (7) and height (8) to obtain a spherical head, and obtain the secon...

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Abstract

The invention discloses a forming process of a chipping scrapping slot bolt. The forming process comprises the specific steps that the length of a cutting material is calculated according to the weight of the bolt and the diameter of the material, pre-upsetting is carried out on the head to obtain the required diameter and height, once extruding is carried out to obtain the thread first blank diameter and the thread first length, the pre-upset head is subjected to ball upsetting according to the diameter and the height needing to be machined, and pre-upsetting is carried out to obtain the thread second blank diameter and the thread second length; meanwhile, extruding is carried out to obtain the chamfering initial diameter and the chamfering initial length; re-extruding is carried out to obtain the thread second blank diameter and the thread second length, the thread third blank diameter and the thread third length are obtained, then the chamfering initial diameter and the chamfering initial length are extruded into the chamfering final diameter and the chamfering final length, and meanwhile, extruding is carried out at the tail end of the bolt to form a chipping scrapping slot; and a formed blank is shaped again to remove burrs at the tail end. By means of the above manner, the chipping scrapping slot can be directly completed by extruding in the cold upsetting process, and the product consistency is effectively ensured.

Description

technical field [0001] The invention relates to a bolt processing technology, in particular to a forming technology of scraping groove bolts. Background technique [0002] The scraper groove bolt matches the internal thread parts after electrophoresis and painting. The function of the scraper groove bolt is to pass through the scraper groove at the end of the bolt. When the bolt is screwed into the inner thread hole, it will accumulate in the inner thread of the screw hole. The electrophoretic paint is scraped off, which facilitates the assembly of parts after painting. [0003] The processing method of the scraping groove is to use a milling machine for single milling, which has low production efficiency, poor product consistency, and prone to missing processes. The burrs generated during the milling process affect the thread accuracy, and the product quality is difficult to be effectively guaranteed. Contents of the invention [0004] The main technical problem to be so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/08B21K1/44
Inventor 何旭初包正芳
Owner CHANGSHU CITY NO 2 STANDARD PARTS FACTORY
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