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Positioning lattice frame spring punching method

A positioning grid and manufacturing method technology, applied in the field of spring manufacturing, can solve problems such as difficult cleaning and aging treatment, large positioning error, and low work efficiency, so as to facilitate cleaning and aging treatment, reduce punching steps, and avoid strain Effect

Active Publication Date: 2012-05-30
CNNC JIANZHONG NUCLEAR FUEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the invention is to solve the technical problems of large positioning errors, low work efficiency, difficult cleaning and aging treatment in the positioning grid spring punching method

Method used

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  • Positioning lattice frame spring punching method
  • Positioning lattice frame spring punching method
  • Positioning lattice frame spring punching method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Such as image 3 As shown, the punching method of the positioning grid spring in this embodiment includes three steps: Punching a spring single product 1: punching a spring single product 1 in a progressive die mode, and the lower end of the spring single product 1 is connected with a connecting bridge 2 ;Counting judgment: when the punching quantity of spring single product 1 is less than n, return to step 1, and when the punching quantity of spring single product 1 is equal to n, go to step 3, wherein, 1<n≤100; cut off the spring row: cut A punched spring row composed of n spring single products 1 connected by connecting bridges 2 .

Embodiment 2

[0062] The spacer grid single spring punching method of the present embodiment comprises the following steps:

[0063] Step 1. Punch single spring product 1 by progressive die.

[0064] First of all, use the punching machine to punch the guide hole and side edge to determine the feeding standard of the strip, and then punch down the guide hole, as shown in the attached Figure 4 As shown, the lower pilot hole and the upper pilot hole are symmetrical to each other, with a distance of 53.3 mm.

[0065] Then, the waste material is punched vertically to determine the outline of the spring single product 1, and the waste material is punched horizontally to determine the width of the spring single product 1. In this embodiment, the width of the spring single product 1 is 3.05mm.

[0066] Next, bend the strips that have been processed by flushing waste in the order from both ends to the middle: as attached Figure 5 As shown, firstly, the upper arc and the lower arc of the spring a...

Embodiment 3

[0075] The difference between the spacer grid single spring punching method of this embodiment and embodiment 2 is:

[0076] In step 1, bend the strips that have been processed by flushing waste in a bottom-up order: first, bend to form the lower arc of the spring; then, correct and shape the lower arc of the spring; next, bend the spring The middle part is bent to form the turning point 5; finally, the upper arc of the spring is formed by bending.

[0077] The spring single product 1 is punched in a bottom-up sequence. This step-by-step forming method allows the material to flow from top to bottom to replenish the forming part, thereby avoiding the phenomenon of spring surface strain and increased material thinning; And when forming section by section, the material replenishment in the forming area is always compensated by the material in the unformed area, which avoids the mutual influence of different parts when forming at the same time, makes the positioning more accurate,...

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Abstract

The invention relates to a positioning lattice frame spring punching method, which belongs to the technical field of spring manufacture. According to the method, a progressive die mode is firstly adopted for punching single spring products; and further, spring rows are obtained through cutting via counting judgment. In the spring punching process, strip materials can be adopted to be punched into single spring products in a sequence from two ends to the middle, and the strip materials can also be adopted to be punched into single spring products in a sequence from bottom to top; and single springs can be punched, and double springs can also be punched. The positioning lattice frame spring punching method solves the technical problems of great positioning error, low work efficiency and difficulty in cleaning and ageing treatment in the positioning lattice frame spring punching method. The positioning lattice frame spring punching method reaches the technical effects that the positioning error is reduced, the work efficiency is improved, and the cleaning and the aging treatment are convenient.

Description

technical field [0001] The invention belongs to the technical field of spring manufacturing and relates to a punching method for a positioning grid spring. Background technique [0002] The spacer grid spring mainly fixes the fuel rods and provides a suitable clamping force, which is an important part of the spacer grid. There are 40 single springs and 244 double springs in a spacer. [0003] The single spring is an asymmetric structure, such as figure 1 As shown, the large arc on one side is the effective working area, and the three small arcs on the other side are the auxiliary working area; the double spring is a symmetrical structure, such as figure 2 As shown, there are one large circular arc and two small circular arcs on both sides, and the two symmetrical large circular arcs are the effective working area. figure 1 , figure 2 The two ends of the single spring and the double spring are shown respectively when they are spot welded and closed. In actual operation,...

Claims

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Application Information

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IPC IPC(8): B21D53/00B21D35/00
Inventor 叶远东任宇宏胡万伦谢志刚郭翔于小焱徐庆盛建中
Owner CNNC JIANZHONG NUCLEAR FUEL