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Tool setting method for repairing thread by using numerically controlled lathe

A CNC lathe and thread technology, which is applied in the field of thread processing of parts, can solve the problems that the thread accuracy is difficult to meet the design standard requirements, the labor intensity of operators is high, and the efficiency of ordinary lathes is low. The effect of service life

Active Publication Date: 2012-02-15
SOUTHWEST GASOLINEEUM BUREAU TOOLS OF SINOPEC GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the inherent mechanical error of ordinary lathes and the manual observation of tools during tool setting, the thread accuracy after maintenance is difficult to meet the design standard requirements, the product quality is not high, and even the drilling tools are scrapped in advance; in addition, the maintenance efficiency of ordinary lathes is relatively low. Low, high labor intensity of operators and other defects

Method used

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Effect test

Embodiment Construction

[0029] The invention is based on the thread trajectory of the first processed thread, and measures the error between the thread trajectory of the thread to be repaired and the reference trajectory. By changing the zero phase pulse phase of the spindle encoder or changing the Z coordinate of the tool tip starting position Adjust the initial position of the tool tip to make the machined thread track coincide with the thread track to be repaired. The present invention includes the following specific steps:

[0030] (1). Before tool setting, place a fixed plane board in front of the lathe spindle. The plane board faces the spindle, and a straight line section perpendicular to the spindle axis is drawn on the plane board; the aforementioned plane board can also be used in front of the lathe spindle The lathe itself is flat instead,

[0031] (2). Clamp the part on the lathe, align it, and process a part that is consistent with the thread design standard on the part to be repaired. After...

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PUM

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Abstract

The invention discloses a tool setting method for repairing thread by using a numerically controlled lathe. The method comprises the following steps of: measuring the error of a thread track line of thread to be repaired and a reference track line by taking the thread track line of firstly processed thread as a reference; and adjusting an initial position of a tool nose to enable a processed thread track to be overlapped with the thread track to be repaired by changing the pulse phase of a zero phase of a main shaft encoder or changing a Z coordinate of the initial position of the tool nose. The method is specially designed for repairing the thread of a drilling tool by using the numerically controlled lathe, and has the characteristics of easiness in operation, accuracy in tool setting, high efficiency, quickness, light labor intensity of operating personnel, high practicability and the like; large-scale repair processing is facilitated; the thread of the drilling tool repaired through tool setting by using the method has higher quality; the repair frequency of a drilling tool joint is increased; and the service life of the drilling tool is prolonged. The method can be used for repairing the thread of the drilling tool joint under numerical control, and can also be applied to thread repair of all other parts of which the thread repair track is required to be overlapped with the original thread track in numerical control.

Description

Technical field [0001] The invention relates to thread processing of parts, in particular to a tool setting method for repairing threads on a numerical control lathe. It is suitable for thread repairing of various parts, especially for the threads of drilling tools, tubing and casing joints used in oil and gas production. repair. Background technique [0002] During the use of the drilling tool, due to the impact of bumps, abrasion, corrosion and multiple times of buckling, the thread parameters are likely to exceed the design standard requirements, which will affect the connection effect between the drilling tools, resulting in the entire drilling tool in use. In order to ensure the normal use of the drill tool, the threaded part of the drill tool needs to be repaired. [0003] The thread repair of the drilling tool is generally completed by an ordinary lathe. The thread repair process is to manually place the tool tip into the groove of the thread to complete the tool setting, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23G3/04
Inventor 廖凌崔顺贤陈柏兵叶顶鹏袁中华张相国吴俞辛杨翊杨碧玉刘涛刘遵平汤红
Owner SOUTHWEST GASOLINEEUM BUREAU TOOLS OF SINOPEC GROUP
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