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A Local Thixotropic Extrusion Method for Axle Sleeve Parts

An extrusion method and part technology, applied in the field of semi-solid forming, can solve the problems of long production cycle, poor mechanical properties, low material utilization rate, etc., and achieve the effect of high material utilization rate, good performance and improved mechanical properties

Active Publication Date: 2020-05-15
重庆大江杰信锻造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a local thixotropic extrusion method for bushing parts in order to solve the problems of low material utilization rate, poor mechanical properties and long production cycle in the existing bushing preparation method. Local thixotropic deformation prepares shaft sleeve parts with high material utilization rate, high production efficiency and excellent mechanical properties, which specifically includes the following steps:

Method used

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  • A Local Thixotropic Extrusion Method for Axle Sleeve Parts
  • A Local Thixotropic Extrusion Method for Axle Sleeve Parts
  • A Local Thixotropic Extrusion Method for Axle Sleeve Parts

Examples

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Embodiment 1

[0033] A kind of local thixotropic deformation method of copper alloy bushing part described in this embodiment, technological process is as follows figure 1 As shown, the mold structure is as Figure 2-3 As shown, the specific steps are as follows:

[0034] (1) The material of this example is ZCuSn10P1 copper alloy, and the measured solidus temperature of ZCuSn10P1 copper alloy is 876.1°C, and the liquidus temperature is 1024.2°C.

[0035] (2) Locally heat the extruded ZCuSn10P1 copper alloy tube with an inner diameter of 26mm, a wall thickness of 7mm, and a height of 52mm. The heating height is 12mm, and the heating temperature is 886°C and kept for 5 minutes; at the same time, the cavity of the concave mold is preheated to 450°C .

[0036] (3) Put the heated ZCuSn10P1 copper alloy tube into the preheated die cavity, then drive the punch to extrude the metal tube at a speed of 10mm / s, and hold the pressure for 4s after extrusion.

[0037] (4) Rapid water quenching of the ...

Embodiment 2

[0041] A local thixotropic deformation method of a 7075 aluminum alloy bushing part described in this embodiment, the preparation process is as follows figure 1 As shown, the specific steps are as follows:

[0042] (1) The material of this example is 7075 aluminum alloy, and the measured solid-liquidus temperature range of 7075 aluminum alloy is 540-638°C.

[0043] (2) Partially heat the extruded 7075 aluminum alloy tube with an inner diameter of 26mm, a wall thickness of 7mm, and a height of 52mm. The heating height is 12mm, and the heating temperature is 545°C and kept for 10 minutes; at the same time, the concave mold cavity is preheated to 400°C .

[0044] (3) Put the heated 7075 aluminum alloy tube into the preheated concave mold cavity, then drive the punch to squeeze the metal tube at a speed of 15mm / s, and keep the pressure for 10s after extrusion.

[0045] (4) Rapid water quenching of the extruded shaft sleeve parts, then heating to 380°C and holding for 30 minutes, a...

Embodiment 3

[0048] A local thixotropic deformation method of an AZ91D magnesium alloy shaft sleeve part described in this embodiment, the preparation process is as follows figure 1 As shown, the specific steps are as follows:

[0049] (1) The material of this example is AZ91D magnesium alloy, and the measured solid-liquidus temperature range of AZ91D magnesium alloy is 470-595°C.

[0050] (2) Locally heat the AZ91D magnesium alloy tube with an inner diameter of 26mm, a wall thickness of 7mm, and a height of 52mm. The heating height is 12mm, and the heating temperature is 478°C and kept for 8 minutes; at the same time, the concave mold cavity is preheated to 350°C.

[0051] (3) Put the heated AZ91D magnesium alloy tube into the preheated concave mold cavity, and then drive the punch to squeeze the metal tube at a movement speed of 13mm / s, and keep the pressure for 7s after extrusion.

[0052] (4) Rapid water quenching of the extruded shaft sleeve parts, then heating to 320°C and holding f...

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Abstract

The invention discloses a local contact extrusion method of a shaft sleeve part, and belongs to the field of semi-solid forming. The method comprises the following steps that firstly, a metal pipe isconducted local induction heating to the temperature of a solidus temperature or above, and heat preservation is carried out; then the metal pipe is put into a preheated mold to carry out extrusion deformation and pressure maintaining is carried out, rapid water quenching is carried out on an extruded shaft sleeve part, and finally T6 heat treatment is carried out. According to the method, a localsemi-solid forming technology is adopted, the production efficiency is high, energy consumption is low, product quality is high, a material utilization rate is high and mechanization and automatic production are realized conveniently.

Description

technical field [0001] The invention relates to a partial thixotropic extrusion method for shaft sleeve parts, which belongs to the field of semi-solid forming. Background technique [0002] Metal bushing parts have the functions of supporting the rotary shaft, positioning and guiding, and are often used in automobiles, high-speed rail, aerospace and other fields. The traditional bushing parts production method generally adopts liquid forming tubular blanks such as centrifugal casting, and then through machining, the tubular blanks are turned into the required shape of the bushing parts. The bushing parts formed by this method, on the one hand, due to the liquid forming The blank has a coarse dendrite structure, which leads to low comprehensive mechanical properties of the bushing parts and affects the service life of the parts; on the other hand, the blank has undergone a lot of machining, resulting in low material utilization and long production cycle. Another production ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D22/02B21D37/10B21D37/16B21D45/04
CPCB21D22/022B21D37/10B21D37/16B21D45/04
Inventor 肖寒熊迟段志科周荣锋卢德宏蒋业华
Owner 重庆大江杰信锻造有限公司
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