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Internal thread machining improved process

An internal thread processing and internal thread technology is applied in the field of internal thread processing and improvement of sheet materials, which can solve the problems of affecting processing quality, serious thread cracks, and high product rejection rate, so as to reduce the rejection rate, improve serious cracks, and improve product quality. quality effect

Inactive Publication Date: 2012-07-11
KUNSHAN JIAHUA ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the internal thread processing technology commonly used for plates, the steps are generally: pre-punching, flanging, and tapping. The disadvantage is that the cracks at the thread are serious, which affects the processing quality and makes the product scrap rate high.

Method used

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  • Internal thread machining improved process
  • Internal thread machining improved process

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Embodiment

[0014] Embodiment: A kind of internal thread machining improvement process, concrete steps are as follows:

[0015] Step 1: Stretching pretreatment A: Stretch to a set depth on the place where the internal thread needs to be processed on the sub-processed plate, so that the tensile deformation of the plate will form a pit at the place where the internal thread needs to be processed;

[0016] Step 2: Pre-punching B: Punching to form a coaxial pre-punching hole at the stretching position;

[0017] Step 3: Germination C: Use a punch to perform germination on the pre-punched hole (that is, flanging, further stretching and deformation of the material) to form a columnar through hole without internal threads;

[0018] Step 4: Tapping: Use a tap to tap in the germinated columnar through-hole to form a threaded hole.

[0019] After the above steps, the material is stretched and deformed twice, the stress concentration inside the material is relatively small, and the wall thickness is...

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Abstract

The invention discloses an internal thread machining improved process, which specifically comprises the following steps of: performing drawing pretreatment: drawing for a set depth at a place, where internal thread is required to be machined, on a plate to be machined; pre-punching a hole: punching a coaxial pre-punched hole at the drawing position; sprouting: sprouting on the pre-punched hole to form a columnar through hole without internal thread by using a punch; and finally tapping: tapping thread in the sprouted columnar through hole to form a threaded hole by using a thread tap. According to the internal thread machining improved process, by increasing a one-step drawing process, a material deforms through two drawing processes to reach the required flanging height, so that stress concentration of the material can be greatly reduced, the situation of serious crack at the thread can be effectively improved, the product quality is improved, the reject rate is reduced, the cost is saved, and a product is safer and more reliable in use.

Description

technical field [0001] The invention relates to a thread processing technology, in particular to an improved internal thread processing technology of a plate. Background technique [0002] At present, in the internal thread processing technology commonly used for plates, the steps are generally: pre-punching, flanging, and tapping. The disadvantage is that the cracks at the thread are serious, which affects the processing quality and makes the product scrap rate high. Contents of the invention [0003] In order to overcome the above defects, the present invention provides an improved internal thread processing technology, which can effectively improve the serious cracks at the thread, improve product quality, and reduce costs. [0004] The technical scheme that the present invention adopts in order to solve its technical problem is: a kind of internal thread processing improvement process, concrete steps are as follows: [0005] Step 1: Stretching pretreatment: Stretch th...

Claims

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Application Information

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IPC IPC(8): B23P17/00B21D22/20
Inventor 殷黎明李学军沈帅灵邬金声
Owner KUNSHAN JIAHUA ELECTRONICS
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