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Method for manufacturing beryllium bronze explosion-proof hammer

A beryllium bronze and beryllium manufacturing technology, which is applied in the field of explosion-proof tool manufacturing, can solve the problems of coarse structure, high rejection rate and low density, and achieve the effects of uniform and fine grains, high production efficiency and high density.

Active Publication Date: 2020-05-08
HEBEI BOTOU SAFETY TOOLS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention is to provide a kind of manufacturing method of the metal mold of making beryllium bronze explosion-proof hammer and beryllium bronze explosion-proof hammer head, to solve the low density, coarse structure and easy use in the production of beryllium bronze explosion-proof hammer head existing casting technology. The problem of jumping blocks, and at the same time solve the problem that the beryllium bronze explosion-proof hammer head produced by the existing forging or casting and forging technology is easy to crack and lead to high scrap rate

Method used

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  • Method for manufacturing beryllium bronze explosion-proof hammer

Examples

Experimental program
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Effect test

Embodiment 1

[0040] A metal mold for manufacturing a beryllium bronze explosion-proof hammer, which includes a horizontally divided upper mold 1 and a lower mold 2; the upper mold 1 is provided with an upper mold half cavity 3, and the lower half mold 2 The upper part is provided with a lower mold half cavity 4 corresponding to the upper mold half cavity 3, and the upper mold half cavity 3 and the lower mold half cavity 4 are closed to form an explosion-proof hammer head cavity.

[0041] The metal mold is made of hot-worked abrasive steel and has a horizontal parting surface. The upper and lower parting surfaces are located on the horizontal center surface of the beryllium bronze explosion-proof hammer head.

[0042] The center of the top surface of the upper mold half cavity 3 is provided with an upper half core 5, and the center of the bottom surface of the lower mold half cavity 4 is provided with a lower half core 6, and the upper half core 5 and the lower half core 6 are cones. The cone-sh...

Embodiment 2

[0050] A method for manufacturing a beryllium bronze explosion-proof hammer using the metal mold in Example 1, which includes the following steps:

[0051] (1) The beryllium bronze alloy is smelted to obtain a beryllium bronze alloy liquid; the beryllium bronze alloy includes the following components by mass percentage: Be 1.80% and the balance of Cu, without Ni; the melting temperature is 1200°C.

[0052] (2) Mold clamping: Pour the beryllium bronze alloy liquid into the storage cavity of the lower half by gravity for 2~5 seconds, close the upper half and the lower half, press and lock, the pouring temperature It is 1200°C. Applied pressure (N) ≥ the horizontal projection area of ​​the entire cavity (mm 2 )×100 (MPa); The pressure lock mold clamping is to use pressure equipment to directly compress the upper and lower molds. The pressurizing equipment is a hydraulic press, the nominal force of the main cylinder is 6000 kN, the upper extrusion cylinder is 3500 kN, and the lower ex...

Embodiment 3

[0057] A method for manufacturing a beryllium bronze explosion-proof hammer using the metal mold in Example 1, which includes the following steps:

[0058] (1) The beryllium bronze alloy is smelted to obtain a beryllium bronze alloy liquid; the beryllium bronze alloy includes the following components by mass percentage: Be 2.00% and the remainder of Cu, without Ni; the melting temperature is 1300°C.

[0059] (2) Mold clamping: Pour the beryllium bronze alloy liquid into the storage cavity of the lower half by gravity for 2~5 seconds, close the upper half and the lower half, press and lock, the pouring temperature It is 1200°C. Applied pressure (N) ≥ the horizontal projection area of ​​the entire cavity (mm 2 )×160 (MPa).

[0060] (3) Pressurized solidification: within 1 to 3 seconds after the clamping pressure is added to the set value, the lower pressure head is used to push the beryllium bronze alloy liquid in the storage cavity to make the alloy liquid enter the explosion-proof h...

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Abstract

The invention relates to a method for manufacturing a beryllium bronze explosion-proof hammer. The method is characterized in that a metal casting mold is used for forming, and a metal column comprises an upper half mold and a lower half mold which are horizontally split; an upper casting mold half cavity is formed in the upper half mold, a lower casting mold half cavity corresponding to the uppercasting mold half cavity is correspondingly formed in the lower half mold, an upper half core is arranged in the center of the top surface of the upper casting mold half cavity, and a lower half coreis arranged in the center of the bottom surface of the lower casting mold half cavity; an exhaust channel is formed in the position, positioned on the parting surface of the upper half mold and the parting surface of the lower half mold, of the outer side of an explosion-proof hammer head cavity; an upper pressing head is arranged on the upper half mold; a material storage cavity is formed in thecenter of the lower half mold, and a lower pressing head is arranged at the bottom of the material storage cavity; and a flow channel is formed between the material storage cavity and the lower casting mold half cavity. The invention further relates to the method for manufacturing the beryllium bronze explosion-proof hammer by utilizing the metal casting mold, so that the problems that the density is low, the structure is thick and large, and blocks are prone to jumping in the using process in the process of producing the beryllium bronze explosion-proof hammer by an existing casting technology are solved.

Description

Technical field [0001] The invention relates to the manufacturing field of explosion-proof tools, in particular to a method for manufacturing beryllium bronze explosion-proof hammers. Background technique [0002] The beryllium bronze explosion-proof hammer is a safety tool used in flammable and explosive special occasions. Its hammer head does not produce sparks when impacted. The beryllium bronze explosion-proof hammer head has anti-magnetic performance in places with a magnetic field. It is currently considered to be Ideal explosion-proof tool. [0003] The traditional manufacturing methods of beryllium bronze explosion-proof hammers include casting, forging, and combination of casting and forging. Among them, the casting of beryllium bronze explosion-proof hammers uses sand casting and solidification under gravity conditions, which generally have low density, rough surface, and size. The problem of large volatility. The forging method of the beryllium bronze explosion-proof h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/02C22C9/00
CPCB22D18/02C22C9/00
Inventor 邢书明高文静杨景华韩亮
Owner HEBEI BOTOU SAFETY TOOLS CO LTD
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