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Method for processing threads on ends of stainless steel bar

A technology of stainless steel and thread, which is applied in the field of thread processing at the end of stainless steel bars. It can solve the problems of different strength and performance of stainless steel bars, no thread processing, and thread processing of stainless steel bars. It is easy to popularize and apply, and the steps are simple and reliable.

Active Publication Date: 2017-02-01
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] People hope that stainless steel bars can also be connected by threaded sleeves, but in the prior art, there is only a method for processing threads at the ends of carbon steel bars, but there is no method for processing threads at the ends of stainless steel bars, and the stainless steel bars The strength and performance are different from those of carbon steel bars, so the method of threading the ends of carbon steel bars is not suitable for threading the ends of stainless steel bars, so there is an urgent need for a method of threading the ends of stainless steel bars

Method used

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  • Method for processing threads on ends of stainless steel bar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Materials to be processed: S25 stainless steel bars:

[0022] Preset thread parameters: The major diameter of the preset thread is 27.5mm, the effective length of the preset thread is 25mm, and the height of the preset thread is 2mm

[0023] Calculation formula and related correction knowledge: preset value = major diameter of preset thread - height of preset thread + first correction constant, wherein the first correction constant is 0.7mm; gap between rollers of thread rolling machine = preset The major diameter of the thread - twice the height of the preset thread + a second correction constant, wherein the second correction constant is 0.2mm.

[0024] The method of threading the end of the stainless steel bar of S25 specification is:

[0025] Upsetting step: Calculate the base circle diameter according to the calculation formula of "preset value = major diameter of preset thread - height of preset thread + first correction constant", that is, 27.5-2+0.7=26.2 mm, a...

Embodiment 2

[0029] Materials to be processed: S28 stainless steel bars:

[0030] Preset thread parameters: The major diameter of the preset thread is 30.5mm, the effective length of the preset thread is 28mm, and the height of the preset thread is 2mm

[0031]Calculation formula and related correction knowledge: preset value = major diameter of preset thread - height of preset thread + first correction constant, wherein the first correction constant is 0.7mm; gap between rollers of thread rolling machine = preset The major diameter of the thread - twice the height of the preset thread + the second correction constant, the second correction constant is 0.2 mm.

[0032] The method of threading the end of the stainless steel bar of S28 specification is:

[0033] Upsetting step: Calculate the base circle diameter according to the calculation formula of "preset value = major diameter of preset thread - height of preset thread + first correction constant", that is, 30.5-2+0.7=29.2 mm, and the...

Embodiment 3

[0037] Materials to be processed: S32 stainless steel bars

[0038] Preset thread parameters: The major diameter of the preset thread is 34.5mm, the effective length of the preset thread is 32mm, and the height of the preset thread is 2mm

[0039] Calculation formula and related correction knowledge: preset value = major diameter of preset thread - height of preset thread + first correction constant, wherein the first correction constant is 0.4mm; gap between rollers of thread rolling machine = preset The major diameter of the thread - twice the height of the preset thread + the second correction constant, the second correction constant is 0mm.

[0040] The method of threading the end of the stainless steel bar of S32 specification is:

[0041] Upsetting step: calculate the base circle diameter according to the calculation formula of "preset value = major diameter of preset thread - height of preset thread + first correction constant", that is, 34.5-2+0.4=32.9 mm, and then u...

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Abstract

The invention relates to a method for processing threads on the ends of a stainless steel bar. The method comprises the steps of upsetting: the target end of the stainless steel bar is upset so as to form an upset section of which the base diameter is equal to a preset value and the length is equal to the effective length of preset threads, wherein the preset value is equal to (the large diameter of the preset threads - the height of the preset threads + a first modified constant); stripping: reinforcing ribs on the upset section are stripped so as to form a to-be-rolled section of which the diameter is equal to the preset value and the surface is smooth; and rolling: the to-be-rolled section is rolled by a thread rolling machine so as to form the preset threads on the to-be-rolled section, wherein the clearance between rollers of the thread rolling machine is equal to (the large diameter of the preset threads - two times the height of the preset threads + a second modified constant). The invention provides the method for processing the threads on the ends of the stainless steel bar. According to the method for processing the threads on the ends of the stainless steel bar, qualified threads can be processed, so that the threads of the stainless steel bar can be smoothly connected by adopting a threaded sleeve.

Description

technical field [0001] The invention relates to a method for threading the end of a stainless steel bar. Background technique [0002] In reinforced concrete buildings, carbon steel bars connected by threaded sleeves have been widely used due to their reliability and safety. Among them, the threaded sleeve connection is to process the ends of carbon steel bars into threads, and then the matching threaded sleeve connects two carbon steel bars. [0003] People hope that stainless steel bars can also be connected by threaded sleeves, but in the prior art, there is only a method for processing threads at the ends of carbon steel bars, but there is no method for processing threads at the ends of stainless steel bars, and the stainless steel bars The strength and performance are different from those of carbon steel bars, so the method of threading the ends of carbon steel bars is not suitable for threading the ends of stainless steel bars. Therefore, there is an urgent need for a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 王辉绵乔希琳关英贾永胜
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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