Milling technology with obstructed sealing surface

A sealing surface and barrier-free technology, applied in the direction of milling machine equipment, manufacturing tools, milling machine equipment details, etc., can solve problems such as oil leakage, product qualification rate is only 20%, air leakage, etc.

Active Publication Date: 2010-08-04
DONGFENG AUTOMOBILE COMPANY
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AI Technical Summary

Problems solved by technology

In the final step of finishing milling, milling without cutting in the plane will inevitably produce tool marks on the processing surface around the obstacle position (see Figure 4 ), when the processing surface is a sealing surface that requires high machining accuracy, if the above method is used for the final step of fine milling, the sealing surface after installation is prone to "three leaks" (water leakage, air leakage, oil leakage) problems
For example, there are tool marks on the joint surface of the oil cooler when it is processed by the existing milling technology, and there are often quality accidents of water leakage after installation, and the qualified rate of the product is only 20%.

Method used

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  • Milling technology with obstructed sealing surface
  • Milling technology with obstructed sealing surface
  • Milling technology with obstructed sealing surface

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Embodiment Construction

[0014] The process of the present invention will be described in detail below in conjunction with the accompanying drawing 0 by taking the milling finishing of the engine cylinder block sealing surface 1 as an example.

[0015] The cylinder block sealing surface 2 of the engine cylinder block 1 has an oil passage support 3 protruding from the plane, and the oil passage support 3 acts as an obstacle and cannot be processed by ordinary pass-through milling process.

[0016] The processing technology is as follows:

[0017] 1. Start the milling machine, first perform conventional rough milling and semi-finish milling on the sealing surface 2 of the engine cylinder block, the operation method is: after the milling cutter 4 (a CBN cutter) touches the workpiece, start from point a and cut into the workpiece with asymmetrical down milling , before the milling reaches the point b before the oil passage support 2 (that is, before the oil passage support 3), the milling ends, and the sp...

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Abstract

The invention discloses a milling technology with an obstructed sealing surface and solves the problem that when the conventional milling technology processes the obstructed sealing surface, the processing precision is low, tool marks are left, and the problem of the 'three leakages' easily happens after the obstructed sealing surface is arranged. The technical scheme comprises rough milling, half accurate milling and accurate milling; in the accurate milling process, after a milling cutter contacts with a workpiece, the milling cutter is milled into the workpiece in an asymmetrical way till reaching the position of an obstacle; the technical scheme is characterized in that the milling cutter is reversely milled out of the workpiece in an asymmetric way after the milling cutter reaches the position of the obstacle; and the milling cutter is a CBN cutter. The milling technology has high processing precision, no tool marks on a processing plane, simple technology and no 'three leakages'appearing after the obstructed sealing surface is arranged.

Description

technical field [0001] The invention relates to a milling process, in particular to a milling process with an obstacle sealing surface. Background technique [0002] Milling can obtain high metal removal rate, processing accuracy and good surface quality. Therefore, it has been widely valued in modern manufacturing and has developed rapidly. Compared with the traditional cutting process, the cutting speed and feed rate in the milling process have been greatly improved. For the ordinary continuous passable milling plane, the existing milling process can effectively guarantee the machining accuracy. However, for some special milling planes, such as some planes on the engine block, such as the joint surface of the oil cooler mainly used for cooling high-temperature engine oil, since it needs to be sealed by hard contact between the surface and the surface during assembly, this surface is the sealing surface. The quality of milling directly affects the effect of cooling oil. H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23C3/00
Inventor 阮涛柱史鸿勋宋新旺张鹏曹军
Owner DONGFENG AUTOMOBILE COMPANY
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