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Processing method of precision aluminium alloy mold

A processing method and aluminum alloy technology, which is applied in the processing of precision aluminum alloy molds and the field of mold processing, can solve problems such as matching accuracy, difficulty in controlling processing accuracy, and large extrusion ratio, so as to avoid low processing accuracy and high production efficiency. High, operable effect

Inactive Publication Date: 2014-07-02
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a processing method of a precision aluminum alloy mould, which avoids the problems of matching precision and processing precision control in the traditional mold processing method. The processing of a large split mold that requires more than one mold

Method used

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  • Processing method of precision aluminium alloy mold
  • Processing method of precision aluminium alloy mold
  • Processing method of precision aluminium alloy mold

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] To process 6063 aluminum alloy thick-walled round tube products, the product structure is as follows figure 1 As shown, the dimensional accuracy requires 0 mm~0.05 mm. This product is formed by hot extrusion with a split-flow combination die. The mold material is H13 steel (4Cr5MoSiV1). The mold structure is designed to be 6 out of one mold (extrusion coefficient is 49.2). The mold structure diagram is shown in Figure 2. The specific processing technology is as follows:

[0029] First of all, select the annealed mold blank for rough machining, including: the processing of the upper mold shape, split hole, screw hole, pin hole, seam, core transition zone, and wire hole; the lower mold welding chamber, empty Processing of knives, pin holes, screw holes, threading holes, etc.;

[0030] Vacuum quenching heat treatment is carried out on the mold blank processed by rough turning. The heat treatment process is as follows: heating to 1020 ℃ ~ 1050 ℃, oil quenching (oil tempera...

Embodiment 2

[0036] Want to process 1070 aluminum alloy single-hole channel pipe products, the product structure is as follows image 3 As shown, the mold material is 3Cr2W8V, and the mold structure is designed as a single mold. The mold structure diagram is shown in Figure 4. The specific mold processing technology is as follows:

[0037] First of all, the rough turning process is carried out on the selected mold blank, which mainly includes: the processing of the upper mold split hole, tapping, pin hole, and thread hole; the lower mold screw hole, pin hole, welding chamber, empty knife, and thread hole. Processing of wire holes;

[0038] After the rough turning process is completed, the mold is subjected to vacuum quenching treatment. The specific process is: heating to 1050 ℃ ~ 1100 ℃, after the mold is fully heated, put it into quenching oil at 40 ℃ ~ 60 ℃ for oil quenching, in order to eliminate stress and stabilize the structure and Size, the mold after quenching should be tempered ...

Embodiment 3

[0044] Want to process 6061 aluminum alloy three-hole channel pipe products, the product structure is as follows Figure 5 As shown, the mold material is 3Cr2W8V, and the mold structure is designed as a single mold. The mold structure is shown in Figure 6. The specific processing method is as follows:

[0045] First of all, the selected mold blank is subjected to rough turning processing including the shape, split holes, pins, bolts, process holes, threading holes, etc.; the number of threading holes in the mold core is 3, and the corresponding threading holes of the lower die The number should also be 3;

[0046] Carry out quenching heat treatment to the mold blank after rough machining; Heat treatment process is the same as embodiment 2;

[0047] Complete the processing and matching of the stopper, pins and bolts of the mold after quenching;

[0048] Use slow wire cutting equipment to cut the reference hole of the mated mold. The processing of the reference hole should ens...

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Abstract

The invention relates to a processing method of mold, particularly a processing method of a precision aluminum alloy mold, and belongs to the technical field of mold processing. The method provided by the invention conducts rough machining on the mold material to complete process of fabrication hole, pin hole, screw tap and bolt hole; then quenching and heat treatment is carried out; then an upper mold and a lower mold are assembled to complete cooperation of a seam allowance and a positioning pin, and fastening bolt is used for tightening; a positioning basic hole is processed, wherein the surface roughness of the hole should be higher than of Ra0.8; the core of the upper mold is processed in an inlaying welding mode; a core rod of the mold core is processed in a cylindrical grinding mode, a core head of the mold core is processed by line cutting, and the processed mold core is inserted into an upper mold inlay hole and welded and fixed by argon arc on the back end; the mold hole of the lower mold is processed by wire cutting, and position of the mold hole is determined by the positioning basic hole; and detection of size, shape and surface quality is carried out. The mold provided by the invention has the advanategs of high machining precision, strong operability, short process flow and low cost, and is suitable for small batch supply production.

Description

technical field [0001] The invention relates to a processing method of a mold, in particular to a processing method of a precision aluminum alloy mold, and belongs to the technical field of mold processing. Background technique [0002] Precision aluminum alloy split mold is one of the more difficult mold processing. It has high requirements on the surface quality of the die hole, the dimensional accuracy of the die hole and the assembly accuracy of the upper and lower dies, and the processing difficulty is particularly high. [0003] The traditional processing flow of the combined split mold: blank processing → quenching and tempering → matching of upper and lower dies → EDM sleeve machining (rough and fine) → honing and polishing → surface hardening → finished product inspection. This processing method is more suitable for split-flow composite molds with simple structures, but it is difficult to guarantee molds with complex cross-sectional structures and fine dimensions. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C25/10B23H9/12
Inventor 杜鹏李德富郭胜利王国辉吕长浩
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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