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Double-headed tapping clamp

A tapping and fixture technology, which is applied in the field of tapping fixtures, can solve the problem of low repeat positioning accuracy of blanks, and achieve the effects of decentralized processing, overcoming processing errors, and simple equipment structure

Active Publication Date: 2012-07-04
JIANGSU ZUZEM VALVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This technology overcomes the problem of low repeated positioning accuracy of blanks caused by scattered processes, and provides a reasonable valve body double-head tapping fixture to ensure product accuracy and processing efficiency during tapping processing

Method used

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Embodiment Construction

[0016] The working principle of this technology will be further described below with the accompanying drawings.

[0017] see figure 1 , 2 The shown double-head tapping fixture includes a clamp body 10, a pressing plate device arranged on the clamp body for clamping a workpiece to be tapped on the clamp body, and an up-down and horizontal driving device.

[0018] The pressing plate device comprises a pressing plate 1, a pressing screw 3 and a spring 2 sleeved on the pressing screw. Have lower through hole 101 on clamp body, have upper through hole 11 on pressing plate, the diameter of upper through hole is all greater than the major diameter of the screw tap 51 of tapping the upper inner hole of workpiece, the diameter of lower through hole is greater than that of workpiece. The major diameter of the screw tap 52 of the lower inner hole tapping. When the workpiece 4 is clamped on the clamp body by the clamping plate device, the upper inner hole 41 of the upper end of the wor...

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Abstract

The invention provides a reasonable double-headed tapping clamp for a valve, which solves the problem of low repeated positioning precision of blanks due to scattered working procedures, and ensures product precision and processing efficiency in tapping. The double-headed tapping clamp comprises a clamp body and a pressing plate device which is arranged on the clamp body and used for clamping a workpiece needing tapping on the clamp body, and the pressing plate device comprises a pressing plate and a clamping screw rod. A lower through hole is arranged on the clamp body, an upper through holeis arranged on the pressing plate, and both the diameter of the upper through hole and the diameter of the lower through are larger than the major diameter of a screw tap for tapping. When the workpiece is clamped on the clamp body by the pressing plate device, an upper inner hole at the upper end of the workpiece needing tapping is coaxial with the upper through hole, a lower inner hole at the lower end of the workpiece needing tapping is coaxial with the lower through hole, and a cylindrical mandrel matched with the lower inner hole is coaxial with the lower through hole and is connected with a vertical movement driving device for driving the cylindrical mandrel to vertically move along the axis.

Description

technical field [0001] The technology belongs to the field of mechanical processing and relates to a clamp for thread tapping. Background technique [0002] For a large number of mass-produced products, according to the principle of dispersed processes, the small diameter of the small-diameter valve body (lower inner hole), chamfering and tapping processes at both ends are processed separately. The advantage of this is that the processes are dispersed and then processed. The efficiency is high and the fixture structure is simple, but since the valve body is a casting, the blank must be used for positioning when tapping the thread. Defects such as large coaxiality error between the middle diameter (upper inner hole) axis and the minor diameter (lower inner hole) axis, non-coaxial threads at both ends, and short tap life. The method to solve the above defects is to expand the small diameter of the thread and tap the thread at the same time in one clamping of the valve body. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23G1/20B23G1/44B23Q3/00
Inventor 夏同华肖朋曾翔许建东史军
Owner JIANGSU ZUZEM VALVES
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