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Automotive pattern nut and forming method thereof

A pattern and nut technology, applied in the direction of nuts, threaded fasteners, connecting components, etc., can solve the problems of low yield and short service life of molds, and achieve the effect of improving service life, increasing mold life, and reducing folding

Pending Publication Date: 2022-03-18
DONGFENG MOTOR FASTENER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a flower-shaped nut for vehicles and a forming method thereof, which can realize the weight reduction of the nut under the condition of satisfying the safety performance of the nut and the service performance of the full load, and solve the problem of low yield and mold usage in the existing technology. The problem of short life

Method used

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  • Automotive pattern nut and forming method thereof
  • Automotive pattern nut and forming method thereof
  • Automotive pattern nut and forming method thereof

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Embodiment Construction

[0021] Such as figure 1 , figure 2 with image 3 As shown, a flower nut for vehicles includes an integral structure composed of a main body 1 and a flange part 2. The main body has six sides 3 in total. The sides on the main body are all concave arc-shaped surfaces. The threaded hole 4; the diagonal part 5 of the main body and the transition part 6 between the main body and the flange part are all arc structures, which can increase the structural strength of the nut.

[0022] A method for forming a flower nut for a vehicle, the specific steps are as follows:

[0023] The first step: blanking is a cylindrical blank;

[0024] The second step: Pre-upsetting cylindrical process parts with rounded corners;

[0025] Step 3: Upsetting the flower-shaped main body. The flower-shaped main body has six sides, and the six sides are all concave arc-shaped surfaces. The arc length of each side is 10% smaller than the arc length of the final flower-shaped nut. The arc radius is 48% lar...

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Abstract

The pattern nut for the vehicle comprises an integral structure composed of a main body and a flange part, the main body is provided with six side faces, and the side faces on the main body are all inwards-concave arc-shaped faces; the production method comprises the following steps of blanking in the first step, pre-upsetting in the second step, primarily upsetting the pattern main body in the third step, and cold-upsetting the flange part and the inner hole of the pattern main body in the fourth step. 5, finish upsetting the pattern main body; 6, finish upsetting the pattern main body and deepening an inner hole of the pattern main body; and 7, punching a through hole. Compared with a standard nut of the same specification, the weight of the pattern nut is reduced by 10%-18%; compared with a standard hexagon nut of the same specification, the flower type nut can bear tightening load better, and the service life of the nut can be prolonged; the pattern shape is formed in a step-by-step cold forming mode, the arc length of each side face is gradually increased, the arc radius is gradually reduced, and the percent of pass can be increased through the forming method.

Description

technical field [0001] The invention belongs to the field of fasteners, in particular to a flower nut for vehicles and a forming method thereof. Background technique [0002] At present, nuts with flanges are steel parts, which are mostly used on automobile chassis, engines, and axles. Products are required to have high dimensional accuracy, good mechanical properties, large load bearing and good appearance quality. At present, the main structure of nuts with flanges is hex nuts with flanges. The production process of parts is: blank → cold heading forming → tapping → heat treatment → surface treatment. [0003] With the requirements of environmental protection and energy saving and emission reduction, the lightweight design of automobiles is very meaningful. Hex nuts with flanges are standard fasteners. At present, lightweight designs are rarely carried out on them. It is necessary to meet the safety performance of the nuts, The weight of the nut is realized under the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B37/00B21K1/68B21K1/70
CPCF16B37/00B21K1/68B21K1/70
Inventor 王宗广周泓宇唐正群何利武
Owner DONGFENG MOTOR FASTENER CO LTD
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