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Nut processing technology

A processing technology and nut technology, which is applied in the field of nut fastener processing and nut processing technology, can solve the problems of easily damaged tooth shape and affect the nut precision, and achieve the effect of not easy to damage the tooth shape, stable size and high product precision

Inactive Publication Date: 2015-04-29
HAIYAN SANMA STANDARD HARDWARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem existing in the existing production process is that tapping is performed first and then heat treatment is carried out, and the tooth shape is easily damaged during heat treatment, which affects the precision of the nut

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Material preparation: Prepare alloy materials, each component includes carbon 0.6%, copper 15%, manganese 0.8%, silicon 1.3%, magnesium 0.3%, phosphorus less than 0.08%, sulfur less than 0.08%, boron less than 0.005%, and the balance is iron . According to the specifications of the nuts in the processing drawings, select the disc material with a diameter of 16mm, segment the selected disc material, and divide it into small sections with an average length of 12.5mm to obtain the nut pre-blank;

[0031] Spheroidization treatment: Spheroidize the nut pre-blank, heat the pre-blank to 740°C, keep it warm for 2 hours, then cool it to 680°C and keep it for 4 hours, then take it out of the furnace and air cool it to room temperature;

[0032] Cold heading forming: place the spheroidized nut pre-blank on the cold heading machine for cold heading plastic processing, and obtain the nut blank after cold heading forming, and inspect the formed nut blank;

[0033] Heat treatment: pu...

Embodiment 2

[0037] Material preparation: Prepare alloy materials, each component includes carbon 0.65%, copper 10%, manganese 1.2%, silicon 1.5%, magnesium 0.4%, phosphorus less than 0.08%, sulfur less than 0.08%, boron less than 0.005%, and the balance is iron . According to the specifications of the nuts in the processing drawings, select the disc material with a diameter of 12mm, segment the selected disc material, and divide it into small sections with an average length of 12.5mm to obtain the nut pre-blank;

[0038] Spheroidization treatment: Spheroidize the nut pre-blank, heat the pre-blank to 740°C, keep it warm for 2 hours, then cool it to 680°C and keep it for 4 hours, then take it out of the furnace and air cool it to room temperature;

[0039] Cold heading forming: place the spheroidized nut pre-blank on the cold heading machine for cold heading plastic processing, and obtain the nut blank after cold heading forming, and inspect the formed nut blank;

[0040]Heat treatment: Pu...

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Abstract

The invention discloses a nut processing technology. The nut processing technology comprises the following steps of material preparation, spheroidizing, cold upsetting and forming, heat treatment, thread tapping and surface treatment; (a) material preparation: preparing alloy material, separating into uniform small sections, and obtaining a nut pre-blank; (b) spheroidizing: spheroidizing and annealing the nut pre-blank; (3) cold upsetting and forming: performing cold upsetting and plasticizing, and performing cold upsetting and forming to obtain a nut blank; (d) heat treatment: preheating, quenching and tempering; (e) thread tapping: automatically tapping threads by a thread tapping machine to process internal threads; (f) surface treatment: performing anti-rust treatment on the surface of the finished nut. The nut processing technology has the advantages that the heat treatment and the thread tapping are interchanged, the processed nut needs to obtain the shape specified by the standard, and more importantly, the thread accuracy needs to be guaranteed, so as to match with other parts; by adopting the improved processing method, the easiness in damage to thread shape is avoided, the product accuracy is high, the size is stable, and the mechanical property is good.

Description

【Technical field】 [0001] The invention relates to the technical field of nut fastener processing, in particular to the technical field of nut processing technology. 【Background technique】 [0002] There are three main production processes for ordinary nuts: cold heading, hot heading and machining. Machining is the one with the slowest efficiency and is used less in special cases. Hot heading is suitable for larger specifications, generally M16 ~ M160, or even larger, the material is generally round steel, without cold drawing and pickling, the production process is mainly: blanking, punching, tapping, If there are specific requirements, the two sides of the nut can be chamfered, then heat treated and surface treated. [0003] The specifications of cold heading are usually M3~M30. The main production process is: select the wire, pickling and cold drawing, according to the mold in the cold heading machine, a hexagonal blank of the corresponding size will be punched, poured in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00C21D1/32C21D9/00C21D1/18
CPCB23P15/00C21D1/18C21D1/32C21D9/0093
Inventor 沈海波马为民冯峰凌叶清龚上标蔡林超
Owner HAIYAN SANMA STANDARD HARDWARE
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