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Method for fast and correctly drilling decussation hole of center pin

A criss-cross and accurate technology, which is applied in the field of fast and accurate drilling of center pin cross holes, can solve the problems of easy running of the drill bit and unguaranteed position, and achieve the effect of improving production efficiency and ensuring precision

Inactive Publication Date: 2010-06-16
CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This drilling method is easy to run the drill bit, and the position cannot be guaranteed

Method used

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  • Method for fast and correctly drilling decussation hole of center pin
  • Method for fast and correctly drilling decussation hole of center pin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] refer to figure 1 , the present invention directly drills two φ8 holes on the M58 thread of the central pin 1, including the following steps:

[0012] (1) First, screw the drilling mold 2 onto the thread M56×4-6h of the center pin 1, and then put the drill sleeve 3 on the drilling mold, so that the end face 4 of the drill sleeve is closely attached to the stepped surface 5 of the center pin;

[0013] (2) Draw a cross line on the end face of the drilling jig, turn the center pin on the V-shaped iron 6, use the marking plate to find the level at points A and B, then clamp the workpiece, and drill the φ8 hole at the position of 67.5;

[0014] (3) Rotate the center pin 90 degrees on the V-shaped iron, find the level at points D and E with the marking disc, then clamp the workpiece, and drill the φ8 hole at the position of 77.5.

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Abstract

The invention discloses a method for fast and correctly drilling a decussation hole of a center pin, which is characterized in that a drill jig is firstly screwed on threads of the center pin, a drill sleeve is sleeved on the drill jig, and the end surface of the drill sleeve is tightly adhered to the step surface of the center pin; a cross line is scribed on the end surface of the drill jig, the center pin is rotated on a V-shaped iron, a scribing block is used for leveling, a work piece is clamped, and the hole is drilled; the center pin is rotated for 90 degrees on the V-shaped iron, the scribing block is used for leveling again, the work piece is clamped, and another hole is drilled. In the invention, because the hole is drilled on the drill sleeve and leveling is carried out by scribing the cross line and a drill bit is not easy to deviate, the accuracy of a part can be ensured and the production efficiency can also be enhanced.

Description

technical field [0001] The invention relates to a method for drilling a cross hole on a center pin thread, Background technique [0002] At present, the method of drilling a cross hole on the center pin thread is to first draw a cross line on the root or tip of the thread, and then drill the hole. In this drilling method, the drill bit is easy to run, and the position accuracy cannot be guaranteed. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for quickly and accurately drilling the center pin cross hole. This method can not only ensure the position accuracy of the two holes, but also ensure the dimensional accuracy of each part, and it is very convenient to operate. . [0004] In order to solve the above technical problems, the present invention provides a method for quickly and accurately drilling a center pin cross hole, which is characterized in that it includes the following steps: [0005] (1)...

Claims

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Application Information

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IPC IPC(8): B23B35/00
Inventor 徐剑鑫赵德顺
Owner CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
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