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Mold and method for pressing hard alloy formed press blanks with double inclined holes

A hard alloy and oblique hole technology, applied in the field of molds, can solve the problems of high price of alloy products and limit the mass adoption of ordinary users, and achieve the effect of improving work efficiency and reducing production costs

Active Publication Date: 2015-07-22
江西江钨硬质合金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the high price of alloy products limits the mass adoption of ordinary users.

Method used

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  • Mold and method for pressing hard alloy formed press blanks with double inclined holes
  • Mold and method for pressing hard alloy formed press blanks with double inclined holes
  • Mold and method for pressing hard alloy formed press blanks with double inclined holes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1 Such as Figure 1-9 Shown: a mold for pressing a cemented carbide compact with two symmetrical oblique holes inside, including a base, a die, and a core rod; The taper of the cavity is matched, the inner wall of the lower part of the female mold 4 is set on the upper part of the lower punch 3, and the inner wall of the lower part of the female mold 4 is also set on the upper part of the groove core insert 10 located on the top surface of the base 1; The oblique hole fits, and the ends of the straight core rod 8 and the inclined core rod 2 are threaded; the upper punch 6 sets are inserted between the inner wall of the die 4 and the straight core rod 8, and the stopper 7 is placed on the top surface of the upper punch 6 , the pressure sleeve 9 sleeves are pressed on the top surface of the upper punch 6 and the stopper 7.

[0040] The lower end surface of the inclined mandrel 2 is located on the press table, the height of the inclined mandrel 2 protruding from...

Embodiment 2

[0041] Example 2 Such as Figure 1-9 Shown: adopt the method for mold pressing described in embodiment 1 to have two symmetric hard alloy forming compacts with oblique holes inside, including:

[0042] [1], Place the base 1 on the press table;

[0043] [2] Install the lower punch 3 on the base 1 through taper fit;

[0044] [3] Install the two inclined mandrels 2 into the matching inclined holes in the lower punch 3, and the lower end surface of the inclined mandrels 2 is located on the press table ， The height of the inclined core rod 2 protruding from the top surface of the lower punch 3 should be equal to the thickness of the formed compact 5, and the diameter and inclination of the oblique hole of the lower punch 3 are equal to the diameter and inclination required for the oblique hole of the formed compact 5;

[0045] [4] Install two straight mandrels 8 on the inclined mandrel 2. The diameter of the straight mandrel 8 is equal to the major axis of the horizontal ellips...

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Abstract

The invention relates to a mold and a method for pressing hard alloy formed press blanks with double inclined holes. The lower part of a lower punch arranged at the top surface of a base is in taper fit with an inner cavity of the base, the inner wall of the lower part of a female mold is sheathed at the upper part of the lower punch, the inner wall of the lower part of the female mold is simultaneously sheathed at the upper part of a groove core embedding block arranged at the top surface of the base, an inclined core rod is matched with an inclined hole in the lower punch, the end parts of the inclined core rod and a straight core rod are connected through screw threads, an upper punch is sheathed and inserted between the inner wall of the female mold and the straight core rod, a position limiter is arranged on the top surface of the upper punch, and a press sleeve is sheathed and pressed on the top surface of the position limiter and the upper punch. The mold is placed on a work table of a press machine, quantitative hard alloy powder is added into the female mold, the press machine exerts pressure, and the formed press blanks are pressed. The method is adopted for replacing the traditional process for processing hard alloy formed press blanks with double inclined holes by adopting the precise fast wire feeding processing, the addition of a precise fast wire feeding processing lathe is not needed, the work efficiency can be improved, and the production cost is reduced by more than 50 percent.

Description

technical field [0001] The invention relates to a mold, in particular to a mold for pressing a cemented carbide compact with two symmetrical oblique holes inside and a pressing method thereof. Background technique [0002] The common production process of cemented carbide products is powder pressing and high-temperature sintering to form alloy products with high hardness, high wear resistance and difficult processing. Due to the limitations of powder compaction, many special-shaped alloy products cannot be directly formed by molds, and need to be pre-fired and then half-processed or sintered and then finished to size. Due to the high hardness of the alloy, it usually requires modern advanced processing methods, such as wire cutting, EDM and other processing methods. These processing methods have a great impact on product costs: high machine tool costs, high processing costs, and high technical requirements for workers. Therefore, for special-shaped products, if the innova...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F5/10
Inventor 江启军
Owner 江西江钨硬质合金有限公司