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Stretch molding technology for copper alloy damping sleeve

A technology of stretch forming and copper alloy, which is applied in the field of stretch forming technology, can solve problems such as troublesome connection, prone to cracking, indentation, and unfavorable yield, so as to avoid cracking and indentation, improve production efficiency and The stability of product quality and the effect of improving the qualified rate

Active Publication Date: 2018-03-09
广东吕华集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The design of the molding process is unreasonable, and it is easy to have defective products such as cracks and indentations, which is not conducive to the improvement of the yield;
[0004] 2. Each process has its own mold forming, and the connection between each process is troublesome, which takes up a lot of manpower and material resources, which is not conducive to cost control and production efficiency improvement;
[0005] 3. Low mold precision and unstable product quality

Method used

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  • Stretch molding technology for copper alloy damping sleeve
  • Stretch molding technology for copper alloy damping sleeve
  • Stretch molding technology for copper alloy damping sleeve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 2 As shown, this embodiment includes a stretch forming process of a copper alloy shock absorbing sleeve. A copper alloy sheet with a thickness of D is used to make a stretched original sheet, and then stretched and formed. Said D∈[0.48,0.5], in actual production, the copper alloy with a thickness of 0.5 in the domestic market is purchased, and its tolerance control is within 0.48-0.5. The diameter φy∈[38.10, 42.00] of the stretched original sheet, and the stretch forming includes the following three stretching processes:

[0044] For the first stretch, stretch according to the following parameters: stretch coefficient m1∈[55%, 60%], stretch height h1∈[14.0, 16.0], punch fillet radius r1∈[3.9, 5.0], concave Die fillet radius R1∈[1.5, 2.7];

[0045] For the second stretch, stretch according to the following parameters: stretch coefficient m2∈[70%, 80%], stretch height h2∈[21.0, 23.0], punch fillet radius r2∈[4.5, 5.7], concave Die fillet radius R2∈[1.0,...

Embodiment 2

[0070] The diameter φy=38.10 of stretching original sheet in the present embodiment, the setting of each parameter of stretching process is as shown in the table below:

[0071]

[0072]

[0073] Other technical features of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

Embodiment 3

[0075] The diameter φy=40.00 of stretching original sheet in the present embodiment, the setting of each parameter of stretching process is shown in the table below:

[0076]

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Abstract

The invention provides a stretch molding technology for a copper alloy damping sleeve. A stretch molding original sheet with diameter phi(y) belonging to [38.10,42.00] is made of a copper alloy sheetwith thickness D belonging to [0.48,0.5], and then stretch molding is performed and comprises following three-time stretch processes: in the first stretch process, stretch coefficient m1 belongs to [55%,60%], punch corner radius r1 belongs to [3.9,5.0], and die profile radius R1 belongs to [1.5,2.7]; in the second stretch process, stretch coefficient m2 belongs to [70%,80%], punch corner radius r2belongs to [4.5,5.7], and die profile radius R2 belongs to [1.0,2.2]; for the third stretch process, stretch coefficient m3 belongs to [75%,85%], punch corner radius r3 belongs to [5.0,6.0], and dieprofile radius R3 belongs to [0.6,1.7]; the processes of top punching, side punching and flange edge cutting are sequentially performed after the stretch molding. The novel stretch molding technologyfor the copper alloy damping sleeve is determined finally by reasonably increasing the stretch times and combining accurate calculation and repeat experiments, so that bad products with tension fractures, indentation and the like are effectively prevented, and the qualification rate of finished products is remarkably increased.

Description

technical field [0001] The invention belongs to the technical field of stretch forming technology, and in particular relates to a stretch forming process of a copper alloy shock absorbing sleeve. Background technique [0002] At present, copper alloy is widely used to make various shock absorbers because of its high strength, superior friction reduction and wear resistance. These shock absorbers come in a variety of constructions, one such as figure 1 Shown is a shock-absorbing sleeve with a top, with a large circular hole on the top of the shock-absorbing sleeve, and four circular holes evenly distributed in the circumferential direction on the side wall of the shock-absorbing sleeve. The main parameters of the shock-absorbing sleeve include: Height h, aperture φ and inner top fillet radius r need to satisfy h=25±0.5, φ∈[13.45, 13.50], r∈[5.0, 6.0], where aperture φ and inner top fillet radius r are high precision The required parameters. This copper alloy shock absorber...

Claims

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Application Information

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IPC IPC(8): B21D35/00B21D22/28
CPCB21D22/28B21D35/001B21D35/002
Inventor 吕华
Owner 广东吕华集团有限公司