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Improved process for machining crankshaft oblique oil hole

A processing technology and a technology of oblique oil holes, which are applied in the field of mechanical processing, can solve the problems of difficult grinding, complex blade shape at the tip, waste, etc., and achieve the effect of reducing the difficulty of manufacturing and grinding, easy operation, and increasing costs

Inactive Publication Date: 2013-08-14
李立军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 2. The tip shape of this special gun drill is very complicated, and it is very difficult to grind
[0007] 3. The special gun drill can only be sharpened 4 times, which is a lot of waste

Method used

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  • Improved process for machining crankshaft oblique oil hole
  • Improved process for machining crankshaft oblique oil hole

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Embodiment Construction

[0026] refer to figure 2 As shown, what this figure shows is the original processing technology, first process a deep hole at the upper end of the crankshaft body 3 with a special gun drill 4, and then chamfer the end of the deep hole with a chamfering drill 5. Because the crankshaft body 3 is cylindrical, and the gun drill will also be drilled with an inclination of 50 °, like this, in order to lead the needs of the hole, it must be completed by the special gun drill with sharp angles. Because the edge of this special gun drill is very sharp, it is very easy to wear when drilling, and this special gun drill is also very difficult to sharpen, and the number of repeated grinding is very small. Therefore, there is a lot of waste.

[0027] refer to figure 1 As shown, the figure shows the improved processing technology. Including: stepped centering and chamfering drill 1, crankshaft body 3, ordinary gun drill 2. The specific method is: change the first sequence of the origina...

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Abstract

The invention provides an improved process for machining a crankshaft oblique oil hole. The improved process includes: firstly a stepwise centering chamfering drill is used for machining a tapered blind hole at the corresponding position on a cylindrical surface of a crankshaft, and then an ordinary gun drill performs machining of the crankshaft oblique oil hole through a lead hole provided by the tapered blind hole. The improved process enables a machining method which drills first and then chamfers in a traditional process to be changed, service life of the ordinary gun drill is one time of that of a special gun drill, using effects of the ordinary gun drill and the special gun drill before coping and after coping have no difference, and therefore the improved process for machining the crankshaft oblique oil hole can reduce cost consumption of cutters greatly, is safe and reliable, and has great popularization value.

Description

technical field [0001] The invention belongs to the field of mechanical processing and relates to an improved process for processing inclined oil holes of crankshafts of automobile engines. Background technique [0002] At present, in the process of machining the oblique oil hole of the crankshaft, most of the domestic and foreign professional manufacturers of automobile engine crankshaft use special gun drills. Make a chamfer on the edge, so that the oblique oil hole is finished. Due to the special position of the inclined oil hole, the tip of the gun drill needs to first contact the cylindrical surface of the workpiece during processing, and also form an angle of about 50° with the radial direction of the surface. Therefore, the difficulty is quite large. [0003] In order to complete this very difficult deep hole processing, a special gun drill is used in the traditional process. The drill tip of the gun drill is very tapered, and there is a certain gap in the secondary...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B35/00
Inventor 李立军
Owner 李立军
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