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Super-long deep hole machining method for 4145H drill collar steel

A processing method and drill collar technology, which is applied in the field of ultra-long deep hole processing of 4145H drill collar steel, can solve the problems of not being able to directly observe the cutting state, cutting condition and wear degree of deep hole tools, inconvenient chip discharge, and drill chipping. , to achieve the effect of excellent quality, short molding time and high tool durability

Inactive Publication Date: 2015-04-29
青岛齐力铸钢有限公司
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AI Technical Summary

Problems solved by technology

Deep hole drilling is in a fully closed or semi-closed processing state, and the operator cannot directly observe the cutting state, tool movement and wear degree of the deep hole tool. Since the hole is relatively deep, the path of chips passing through the deep hole is relatively small. Long, not easy to discharge chips, prone to chip blocking, resulting in drill chipping

Method used

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Embodiment

[0017] The 4145H drill collar steel ultra-long deep hole processing method of the present embodiment includes the following requirements:

[0018] (1) Equipment: deep hole drilling machine transformed from C630 ordinary lathe, BTA deep hole drilling system;

[0019] (2) Instruments: dial indicator, pressure gauge, diameter gauge, vernier caliper, ultrasonic thickness gauge

[0020] (3) Workpiece: The material of the workpiece is 4145H drill collar steel bar, the quenched and tempered hardness is HB280~320, and the diameter of the workpiece is Φ121mm. Processing length L=7500mm, aperture is Φ71 0 +0.05 mm, hole surface roughness Ra1.6μm, straightness 0.5mm / 1000mm, belongs to super long deep hole processing;

[0021] (4) Tool: Self-made Φ65mm deep hole drill with staggered teeth and internal chip removal, blade material YG8;

[0022] (5) Process route: flatten both ends on the lathe; drill a hole of Φ65mm, and use an ultrasonic thickness gauge to detect the thickness during ...

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Abstract

The invention discloses a super-long deep hole machining method for 4145H drill collar steel. A super-long deep hole drilling technology for a typical difficult-to-machine material, namely, the 4145H drill collar steel, is researched by taking the difficult-to-machine material as a research object. On the basis of the research on the cutting performance of the typical difficult-to-machine material, a theoretical model for super-long deep hole drilling is established. Aiming at the characteristics of the material, a blade material and geometric parameters of a cutter are reasonably selected; the super-long deep hole machining method for the typical difficult-to-machine material is designed, and has a practical guiding significance to the machining of a super-long deep hole; a technical difficult problem is solved.

Description

[0001] technical field [0002] The invention belongs to the technical field of casting, and in particular relates to a method for processing super-long deep holes of 4145H drill collar steel. [0003] Background technique [0004] In the machinery manufacturing industry, holes with an aspect ratio L / d>50 (L is the depth of the hole and d is the diameter of the hole) are generally called ultra-long and deep holes. Deep hole processing is an important branch of mechanical processing, and the theory of deep hole processing technology is also an important subject of mechanical processing research. Deep hole drilling is in a fully closed or semi-closed processing state, and the operator cannot directly observe the cutting state, tool movement and wear degree of the deep hole tool. Because the hole is relatively deep, the path of chips passing through the deep hole is relatively small. Long, it is not easy to discharge chips, and it is easy to cause chip blocking, result...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B23B41/02
CPCB23B41/02B23B35/00B23B2222/84
Inventor 刘占向
Owner 青岛齐力铸钢有限公司
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