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Method and tool for machining step deep holes

A processing method and a technology for processing cutting tools, which are applied in the direction of manufacturing tools, metal processing equipment, and cutting tools for lathes, etc., can solve the problems of dimensional accuracy, two-hole coaxiality and surface quality that cannot meet product performance requirements, vibration, tool holder, etc. Cantilever is too long and other problems, to eliminate multiple positioning and clamping errors, improve dimensional accuracy, and improve the effect of smoothness

Active Publication Date: 2009-09-23
CHINA COAL ZHANGJIAKOU COAL MINING MACHINERY
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  • Abstract
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  • Application Information

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Problems solved by technology

During turning, the cantilever of the tool bar is too long, the rigidity is poor, and the vibration is severe, resulting in dimensional accuracy, two-hole coaxiality and surface quality that cannot meet the product performance requirements, and the production efficiency is extremely low; during boring, the stepped hole workpiece is installed twice. Clamping, resulting in uncontrollable coaxiality of the two holes, unable to meet product performance requirements
At the same time, neither of the two processing methods can provide a satisfactory positioning reference for the next process.

Method used

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  • Method and tool for machining step deep holes
  • Method and tool for machining step deep holes
  • Method and tool for machining step deep holes

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Embodiment Construction

[0016] The step hole processing method is to use the large and small holes for one positioning and one clamping, and the positive boring combined boring head ( figure 1 , 2 ) Feed the tool from the tail side of the machine once to form the small hole; then, directly remove the front-boring combined boring head on the machine head side, and replace it with the reverse-boring combined boring head; ( image 3 , 4 ) The design size of the back-boring combined boring head forms a transition fit with the size of the guide hole. The small hole becomes the datum of back-boring machining, that is, the machining guiding support surface. For semi-finishing large holes, retract the tool directly to the side of the machine head and replace it with a single rolling head ( Figure 5 ), finishing the large hole in one pass.

[0017] The appearance of the anti-boring combined boring head is very similar to that of the rolling and positive-boring combined boring head, and the installation f...

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Abstract

The invention relates to the technical field of deep hole machining in the machining industry, is used for step deep hole machining processes requiring coaxiality, and particularly provides a method for machining step deep holes. The prior methods for machining step deep holes comprise turning and boring, wherein during turning, an overlong suspension arm of a tool bar, low rigidity and serious vibration lead to not only a failure in meeting product performance requirements in terms of dimension precision, coaxiality between two holes and surface quality, but also extremely low production efficiency; and during the boring, two-time step hole workpiece clamping leads to uneasy control of the coaxiality between two holes and consequently a failure in meeting product performance requirements. In the invention, normal boring is used for machining small holes at once, reverse boring is used for machining big holes by using the small holes as guide surfaces, and a rolling head is used to perform the finishing of the big holes.

Description

1. Technical fields; [0001] The invention relates to the technical field of deep hole processing in the mechanical processing industry, and is used for machining step deep holes requiring coaxiality, in particular to a step deep hole processing method. 2. Background technology: [0002] The traditional step deep hole processing methods include turning and boring. During turning, the cantilever of the tool bar is too long, the rigidity is poor, and the vibration is severe, resulting in dimensional accuracy, two-hole coaxiality and surface quality that cannot meet the product performance requirements, and the production efficiency is extremely low; during boring, the stepped hole workpiece is installed twice. Clamping, resulting in the uncontrollable coaxiality of the two holes, which cannot meet the product performance requirements. At the same time, neither of the two processing methods can provide a satisfactory positioning reference for the next process. 3. Contents of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B41/02B23B27/00B23B27/16
Inventor 高建炯刘国良刘文科张学工张彦斌张发吴兴奎
Owner CHINA COAL ZHANGJIAKOU COAL MINING MACHINERY
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