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Machining method of shallow inclined hole of cylinder block

A processing method and cylinder technology, which is applied to the processing of shallow oblique holes in cylinders and the field of hole processing, can solve the problems of large fluctuations in position and dimension accuracy, inconvenient tool management, and low processing efficiency, and achieve stable processing quality and reduce Machining time, auxiliary tool change time, and machining efficiency improvement effect

Inactive Publication Date: 2020-09-01
KUNMING YUNNEI POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the above two methods have low processing efficiency, the position of the hole is generally Φ0.3 ~ Φ0.8, the position and dimension accuracy of the hole fluctuates greatly, and the number of tools is large, the tool management is inconvenient, and the tool cost is high

Method used

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  • Machining method of shallow inclined hole of cylinder block
  • Machining method of shallow inclined hole of cylinder block
  • Machining method of shallow inclined hole of cylinder block

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The processing method of the cylinder shallow oblique hole of the present embodiment, the processed cylinder material HT250, such as figure 1 shown.

[0031] The cylinder is placed on the fixture of the horizontal machining center with the upper and bottom facing down, and the positioning is performed by two pins on one side of the bottom of the cylinder, and the fixture pressure plate is pressed on the top of the cylinder for clamping, which is carried out by rotating the B axis of the machine tool to the angle of the hole to be processed. processing.

[0032] Positioning and clamping of the workpiece: the workpiece is positioned with the bottom face down, and two pins on one side of the bottom are used for positioning, and the clamping plate is pressed on the top surface of the cylinder body for clamping.

[0033] The cutting tool adopts a straight-fluted flat-bottomed drill with a large chip removal groove, and the drill bit has internal cooling holes, such as ima...

Embodiment 2

[0057] The processing method of the cylinder shallow oblique hole of the present embodiment, the processed cylinder material HT250, such as Figure 4 shown.

[0058] The cylinder is placed on the fixture of the horizontal machining center with the front end facing down, positioned with two pins on one side of the bottom of the cylinder, the clamp pressure plate is pressed against the bottom plate of the cylinder for clamping, and the machine tool B-axis rotates to the angle of the hole to be processed. processing.

[0059] Positioning and clamping of the workpiece: The front end of the workpiece faces downward, and the positioning is performed with two pins on one side of the bottom, and the clamping plate is pressed on the bottom plate of the cylinder body for clamping.

[0060] The cutting tool adopts a straight-fluted flat-bottomed drill with a large chip removal groove, and the drill bit has internal cooling holes, such as Image 6 As shown, the tool has 2 teeth, the spind...

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Abstract

The invention relates to a machining method of a shallow inclined hole of a cylinder block. The method comprises the steps that a pre-drilled hole is adopted as a guiding hole for subsequent machining, fast moving to a safety plane is performed, pre-drilling is conducted, then fast retreating to the safety plane is performed, and then machining is performed with given cutting parameters of the tool design, wherein the depth of the pre-drilled hole is controlled at about 2 times of the hole diameter of the machined hole, a tool adopts small feed during pre-drilling, the hole diameter of the machined hole is small, the hole is shallow, the orifice surface is irregular, and a certain included angle is formed between the axis of the hole and the orifice surface. By adopting the machining method for machining, the advantages of high machining efficiency, low tool cost and high dimensional precision of the hole are achieved.

Description

technical field [0001] The invention relates to a processing method for a hole, in particular to a processing method for a shallow oblique hole in a cylinder body, and belongs to the field of engine processing. Background technique [0002] For the oblique hole with small diameter, irregular orifice surface, and certain angle with the orifice surface of the engine block, the existing technology generally adopts two processing techniques: one is the oblique hole with a relatively large length and diameter, and the horizontal The machining center adopts the processing method of "counter-counter→lead drill→deep hole drilling"; the other is the oblique hole with a relatively small long diameter, and the horizontal machining center adopts the processing method of "counter-counter→deep hole drill". [0003] However, the above two methods have low processing efficiency, the position of the hole is generally Φ0.3-Φ0.8, the position and dimension accuracy of the hole fluctuates great...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B35/00
CPCB23B35/00
Inventor 周涛王金财卢兴辉
Owner KUNMING YUNNEI POWER
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