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Machining method of drilled hole of HT250 material

A processing method and material technology, applied in metal processing equipment, drilling/drilling equipment, boring machine/drilling machine parts, etc., can solve the problems of easy broken drills, large influence of hole chamfering, fast tool wear, etc.

Inactive Publication Date: 2017-04-26
王爱民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In industrial production, the drilling method of HT250 castings is usually processed by high-speed drills, but the tool wears faster, which has a greater impact on the chamfering of the hole, and sometimes C0.5 chamfers appear, and high-speed steel The cutting speed of the drill bit is slow, and it is easy to break the drill bit. If there are special requirements for the drill hole size, it is necessary to use different specifications and types of drill bits for two processing

Method used

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Embodiment Construction

[0007] A processing method for HT250 material drilling, the drilling requires the processed through hole to be ￠15 (0~+0.25), the chamfer of the hole is C0.1~0.2, and the drilling is made of hard alloy step drill, which is drilled first Go to the positioning center hole that is twice as deep as the hole diameter, and then continue to apply axial and radial force until the hole is pierced.

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Abstract

The invention discloses a machining method of a drilled hole of an HT250 material. According to a through hole required by the drilled hole to be machined, the diameter is 15(0-+0.25), and an orifice chamfer is C0.1-0.2; and a hard alloy step drill is adopted for hole drilling, a locating center hole with the depth being double hole diameter is firstly drilled, axial and radial force continues to be applied, and the process is stopped till hole punching is achieved. Through the adoption of the above method, one-time machining can be achieved without replacing a drill bit, the hard alloy drill bit is not prone to being worn, and chamfer consistency is stable.

Description

technical field [0001] The invention relates to a processing method for drilling holes made of HT250 material, and particularly requires that the processed through hole is ￠15 (0~+0.25), and the hole chamfer is C0.1~0.2. Background technique [0002] In industrial production, the drilling method of HT250 castings is usually processed by high-speed drills, but the tool wears faster, which has a greater impact on the chamfering of the hole, and sometimes C0.5 chamfers appear, and high-speed steel The cutting speed of the drill bit is slow, and it is easy to break the drill bit. If there are special requirements for the size of the drilled hole, it is necessary to use drill bits of different specifications and types for two processing. [0003] Here, the present invention adopts a cemented carbide step drill for drilling processing, which can realize one-time processing without replacing the drill bit, and the cemented carbide drill bit is not easy to wear, and the chamfering c...

Claims

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Application Information

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IPC IPC(8): B23B35/00B23B51/00
CPCB23B35/00B23B51/009B23B2222/14
Inventor 王爱民
Owner 王爱民