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Pre-diverging-wedge pressing precision forming die and disc forming method

A precision forming and pre-splitting technology, applied in the direction of metal extrusion dies, etc., can solve the problems of large forming force, high equipment tonnage requirements, high manufacturing cost, etc., to reduce extrusion forming force, reduce contact area, and wide application range Effect

Inactive Publication Date: 2013-12-18
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the flat-bottomed punch is used for upsetting extrusion, the contact area between the punch and the round cake blank is large, the forming force is large, the tonnage of the equipment is high, and the energy consumption is large; the machining allowance of the disc parts formed by upsetting extrusion is large, and the machining cycle Long, low material utilization rate, high manufacturing cost, and mechanical processing damages the upsetting and extruding metal streamline, which affects the mechanical properties of the part

Method used

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  • Pre-diverging-wedge pressing precision forming die and disc forming method
  • Pre-diverging-wedge pressing precision forming die and disc forming method
  • Pre-diverging-wedge pressing precision forming die and disc forming method

Examples

Experimental program
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Effect test

Embodiment 1

[0033] This embodiment is used to form the outer diameter of 480mm, the inner diameter of 50mm figure 1 The LC4 aluminum alloy disc of the structure shown. The mold includes: a pre-split die, a wedge die, a punch mandrel and a template to form an extrusion punch, and a die.

[0034] Specific steps when using this mold:

[0035] Step 1: Heat the assembled precision extrusion mold to 370°C±5°C and keep it warm for 4-5 hours, then assemble the punch and die on the forming hydraulic press, and place the mold and hydraulic press table and slide Install thermal insulation pads on the block contact surface.

[0036] Step 2: Put the LC4 aluminum alloy ring blank (outer diameter 425±2mm, inner diameter 248±2mm, height 75±2mm) heated to 370°C±5°C and keep warm for 2-3 hours into the die, and start the hydraulic press Perform precision extrusion molding.

[0037] Step 3: Remove the load of the hydraulic press, and after the upper slider of the hydraulic press returns, the formed part...

Embodiment 2

[0039] This embodiment is used to form the outer diameter of 480mm, inner diameter of 50mm figure 1 The AZ80 magnesium alloy disc of the structure shown. The mold includes: the mold includes: a pre-split mold, a wedge die, a punch mandrel and a template to form an extrusion punch, and a die.

[0040] Step 1: Heat the assembled precision extrusion mold to 390°C±5°C and keep it warm for 4-5 hours, then assemble the punch and die on the forming hydraulic press, and place them on the mold and the hydraulic press table and slide Install thermal insulation pads on the block contact surface.

[0041] The second step: put the AZ80 magnesium alloy ring blank (outer diameter 425±2mm, inner diameter 248±2mm, height 75±2mm) heated to 380°C±5°C and held for 2-3 hours into the die, and start the hydraulic press Perform precision extrusion molding.

[0042] Step 3: Remove the load of the hydraulic press, and after the upper slider of the hydraulic press returns, the formed part is ejected...

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Abstract

The invention provides an extruding terrace die which is formed by assembling a pre-diverging die, a wedge pressing die and a terrace die core shaft. Firstly, the pre-diverging die is used for realizing the pre-distribution of metal plastic flow volumes, reducing the remain of forged pieces and increasing the utilization rate of materials; the wedge pressing die compels a metal to plastically flow under the action of the wedge pressing force, and as the plastic flow process of the metal is added, the influence on the mechanical properties of the formed part caused by machining is avoided and the purpose of improving the mechanical properties of the formed part is achieved; the terrace die core shaft and a concave die are combined to form a closed cavity so as to restrain the further radial flow of the deformed metal, as a result, the contact area between the terrace die and the deformed metal is reduced and the extruding forming force is reduced.

Description

technical field [0001] The invention relates to the field of mechanical processing and manufacturing, in particular to a pre-splitting-wedge pressure precision forming mold and a disc forming method. Background technique [0002] The extrusion forming process has the function of shape modification and modification, and is one of the important forming processes in the manufacture of metal structural parts. The structure of the extrusion punch directly determines the size of the extrusion forming force and forming energy consumption, the forming quality and mechanical properties of extrusion parts, the machining allowance of extrusion parts and the processing and forming efficiency. Therefore, labor-saving and efficient forming dies have always been the technical field A goal pursued by researchers and designers. [0003] figure 1 and figure 2 Shown is a schematic diagram of the structure of the disk. In the prior art, the solid bar is formed in three passes of upsetting,...

Claims

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Application Information

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IPC IPC(8): B21C25/02B21C23/02
Inventor 郑顺奇朱秀荣陈刚汤进军国宁周灵展
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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