CN217749387U

CN217749387U - Cutter for machining inner hole corrugations of cylinder sleeve of MAN marine diesel engine

Info

Publication number: CN217749387U
Application number: CN202221338877.8U
Authority: CN
Inventors: 张彦宁; 刘文化; 谭玉华; 王舒亚
Original assignee: Yichang Marine Diesel Engine Co ltd
Current assignee: Yichang Marine Diesel Engine Co ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-11-08
Anticipated expiration: 2032-05-31

Abstract

The utility model provides a cutter for MAN marine diesel engine cylinder jacket hole ripple processing, including the cutter body, the upside of cutter body one end is equipped with the installation face, be equipped with positioning groove on the installation face, the blade setting is fixed a position in positioning groove, the cutting edge of blade is the circular arc structure, the cutting edge place face of blade is not coplane with the locating surface of blade lateral part, be equipped with corresponding mounting hole on positioning groove and the blade, the blade compresses tightly through housing screw, mounting hole and housing screw adaptation, the tip of the cutting edge protrusion cutter body of blade front end. The cutter and the machining method can improve and stabilize the machining quality, replace the traditional welding type cutter, reduce the production cost and improve the machining efficiency.

Description

Cutter for machining inner hole corrugations of cylinder sleeve of MAN marine diesel engine

Technical Field

The utility model relates to a machinery skilled worker field, in particular to a cutter that is used for MAN series marine diesel engine cylinder jacket hole ripple to process.

Background

The MAN series low-speed high-power diesel engine is mainly used in marine ship transportation and land power station, and features high power, low oil consumption, high reliability and low cost. The processing requirement of the inner hole corrugation before honing is high, the quality of the inner hole corrugation not only relates to the quality of a cylinder sleeve, but also influences the life cycle of a piston ring, and directly influences the use performance and economic effect of a diesel engine.

The inner hole corrugation processing of the cylinder sleeve needs to apply a special cutter on a special turning and boring machine or a special boring machine, which is a major difficulty in product processing. In the past, a welded turning tool is sharpened into a formed tool for final finish machining, the risk of 'one-time setting failure' exists, when the size deviation of inner hole corrugation occurs or the surface roughness does not reach the standard and needs to return, the whole tool needs to be disassembled and then a new tool needs to be clamped when the tool is replaced, the new tool edge is difficult to accurately control to be matched with the previous tool edge in machining, the phenomenon of corrugation dislocation or disorder occurs, and the quality risk is very high.

At present, a manufacturer for processing the cylinder liner in China uses a welding type forming R lathe tool to process corrugations, but with the improvement of performance indexes of MAN series marine diesel engines, the requirement for processing the inner hole of the cylinder liner after the upgrade of drawings is higher and higher, and the welding type forming R lathe tool is not suitable for the processing requirement (such as G60 and G80 types) of the inner hole corrugations of the cylinder liner in the aspect of processing quality. The CN203401101U discloses a horizontal machine tool for machining an inner hole of a cylinder sleeve of a low-speed diesel engine, which improves a machine tool for machining the inner hole of the cylinder sleeve, but does not improve a cutter for machining the inner hole, and still does not meet the machining of the corrugation of the inner hole of an oil cylinder of a marine diesel engine.

Disclosure of Invention

The utility model aims to solve the technical problem that a cutter for MAN marine diesel engine cylinder jacket hole ripple processing is provided, improves and stabilizes processingquality, replaces traditional welded type cutter, reduction in production cost, improvement machining efficiency.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the utility model provides a cutter that is used for MAN marine diesel engine cylinder jacket hole ripple to process, including the cutter body, the upside of cutter body one end is equipped with the installation face, be equipped with positioning groove on the installation face, the blade setting is fixed a position in positioning groove, the cutting edge of blade is the circular arc structure, the cutting edge place face of blade is not coplane with the locating surface of blade lateral part, be equipped with corresponding mounting hole on positioning groove and the blade, the blade compresses tightly through housing screw, mounting hole and housing screw adaptation, the tip of the protruding cutter body of cutting edge of blade front end.

In a preferred scheme, the positioning surface of the blade is a trapezoidal surface, and the trapezoidal surface is matched with the positioning groove.

Preferably, the top surface of the insert is inclined in the front-rear direction and the left-right direction, and the cutting edge at the front end of the insert is higher than the cutting edge at the rear end.

In a preferred embodiment, the upper surface of the blade has an inclination angle of 15 ± 0.5 ° in the front-rear direction and an inclination angle of 5 ± 0.5 ° in the left-right direction.

In a preferred scheme, a chip guide groove is formed in one side, far away from the blade, of the mounting surface.

In a preferred scheme, the arc radius of the cutting edge of the blade is 60mm-100mm.

In a preferred scheme, a chip reeling groove is formed in the position, close to the cutting edge, of the upper cutter face of the cutter blade.

In a preferred embodiment, the blade is made of YG3X.

In a preferable scheme, the end part of one end of the cutter body, on which the blade is installed, is obliquely arranged, and the end part of the cutter body is obliquely inclined from top to bottom.

The utility model provides a pair of a cutter that is used for MAN marine diesel engine cylinder jacket hole ripple to process has following beneficial effect:

1. the cutter is beneficial to accurate positioning of the blade through the matching of the positioning groove and the positioning surface, the positioning surface and the surface where the cutting edge is located are not interfered with each other, the arc radius of the cutting edge can be polished according to different product sizes, and the positioning and installation of the blade cannot be influenced.

2. This cutter can improve and stabilize processingquality, and the roughness value in surface of cylinder jacket hole reduces, has promoted the surface quality of work piece, better satisfying the processing requirement of MAN diesel engine cylinder jacket upgrade version drawing to the ripple hole.

3. The cutting speed of the cutter can be higher, the cutting time is shortened, and the processing efficiency is obviously improved.

4. When the traditional welding tool is replaced, the whole tool needs to be disassembled and then a new tool needs to be clamped; however, the cutter only needs to replace the blade, so that the use is more convenient, the auxiliary time is shortened, and the production cost is reduced.

Drawings

The invention will be further described with reference to the following drawings and examples:

fig. 1 is a top view of the present invention;

fig. 2 is a left side view of the present invention;

FIG. 3 isbase:Sub>A cross-sectional view taken along plane A-A of FIG. 1;

FIG. 4 is a schematic view of the blade configuration;

FIG. 5 is a right side view of the blade;

FIG. 6 is a schematic view of a compression screw;

FIG. 7 is a top view of a preferred blade;

FIG. 8 is a cross-sectional view taken along plane B-B of FIG. 7;

in the figure: the cutting tool comprises a tool body 1, an insert 2, a mounting hole 3, a compression screw 4, a mounting surface 101, a positioning groove 102, a chip guide groove 103, a cutting edge 201, a surface 202 where the cutting edge is located, a positioning surface 203 and a chip rolling groove 204.

Detailed Description

As shown in fig. 1~6, the tool for machining the inner hole corrugation of the cylinder sleeve of the MAN marine diesel engine comprises a tool body 1, wherein the tool body 1 is made of 45-grade steel, the heat treatment hardness is more than HRC36, the external dimension is 150mm × 32mm × 32mm, the upper side of one end of the tool body 1 is provided with a mounting surface 101, the mounting surface 101 is an inclined surface, and the angle of a cutting edge 201 is controlled by controlling the inclination angle of the mounting surface 101 and combining the structure of a blade 2. The mounting surface 101 is provided with a positioning groove 102, the blade 2 is arranged in the positioning groove 102 for positioning, the blade 2 is made of YG3X, the surface can be coated, the cutting edge 201 of the blade 2 is of an arc structure, the arc radius of the cutting edge 201 of the blade 2 is 60mm-100mm, and the specific arc size of the cutting edge 201 is determined according to the model of the diesel engine cylinder sleeve to be processed.

The surface 202 of the cutting edge of the blade 2 is not coplanar with the positioning surface 203 of the side part of the blade 2, and the positioning surface 203 is matched with the positioning groove 102, so that the installation and the positioning of the blade 2 are realized.

Preferably, the positioning surface 203 of the insert 2 is a trapezoidal surface, the trapezoidal surface is matched with the positioning groove 102, and an included angle between two oppositely arranged positioning surfaces 203 is 50 °. The section of the blade 2 is of an isosceles trapezoid structure, the top plane is 19.05mm multiplied by 19.05mm, and the bottom plane is 13.41mm multiplied by 13.41mm. The included angle between the surfaces 202 of the two opposite cutting edges is 50 degrees, the surface 202 of the cutting edge and the positioning surface 203 are not coplanar, and the positioning of the blade 2 is realized by matching the bottom of the blade 2 with the bottom plane of the positioning groove 102 and the positioning surface 203 with the inner wall of the positioning groove 102.

The positioning groove 102 and the blade 2 are provided with corresponding mounting holes 3, the blade 2 is pressed by a compression screw 4, the mounting holes 3 are matched with the compression screw 4, and a cutting edge 201 at the front end of the blade 2 protrudes out of the end part of the cutter body 1. In the present embodiment, the compression screw 4 is a countersunk screw as shown in fig. 6, the mounting hole 3 of the blade 2 is a counter bore matched with the compression screw 4, and the mounting hole 3 in the positioning groove 102 is matched with the screw rod of the compression screw 4.

The cutter has the advantages that the surface 202 where the cutting edge is located and the positioning surface 203 on the side part of the blade 2 are not coplanar and do not interfere with each other, the arc radius of the cutting edge can be ground according to different product sizes, the positioning and installation of the blade 2 cannot be influenced, two integrated and multi-purpose functions are realized, namely, the substrate of the same blade 2 can grind blades with various arc R values; the same cutter body 1 can be matched with blades 2 with various R values, and is applied to the production of cylinder liners with different specifications.

Preferably, the top surface of the insert 2 is inclined in the front-rear direction and the left-right direction, and the cutting edge 201 at the front end of the insert 2 is higher than the cutting edge 201 at the rear end. The rake face of the individual insert 2 itself is a complete plane without the chip flute 204, i.e. the rake angle is 0 °; the cutter body is designed according to the front angle of 15 degrees of the cutter, and the front angle of the cutter is 15 degrees after the blade 2 is installed, so that the common requirement for finish machining can be met; when the cutting edge 201 is generally worn, the cutting edge can be repeatedly used only by properly grinding the front cutter face (plane), so that the method is simple and convenient, and the grinding quality is ensured, thereby reducing the cost of the cutter.

In the present embodiment, the rake face of the insert 2 is inclined at an angle of 15 ± 0.5 ° in the front-rear direction and at an angle of 5 ± 0.5 ° in the left-right direction. The edge inclination angle is mainly beneficial to the chip to rapidly slide away from the rake face, the arc radius R value of the cutting edge 201 can be influenced when the angle is too large, and the effect is not realized when the angle is too small.

Preferably, as shown in fig. 3, a side of the mounting surface 101 away from the blade 2 is provided with a chip guide groove 103. The chip guide slots 103 are inclined toward the rear end of the cutter body 1. The chip guide groove 103 is an arc-shaped mechanism, and the arc-shaped chip guide groove 103 of the cutter body 1 inclines towards the rear end of the cutter body 1, so that chips (cylinder sleeves are processed into short chips) can flow out quickly towards the direction far away from the workpiece and the cutting edge 201.

As shown in fig. 3, the end of the cutter body 1 where the blade 2 is mounted is inclined, and the end of the cutter body 1 is inclined backward from top to bottom.

By providing the end of the cutter body 1 obliquely, interference of the insert 2 during the corrugating process of the insert 2 can be reduced.

Preferably, as shown in fig. 7 and 8, the upper face of the insert 2 is provided with a chip flute 204 at a position close to the cutting edge 201. The chip flutes 204 mainly serve to increase the rake angle, make the cutting edge 201 sharper, improve the quality of the machined surface, and have a disadvantage of reduced durability. Therefore, for machining with a surface roughness value equal to or greater than ra6.3, the chip flutes 204 are typically not provided; for machining with surface roughness values equal to or less than ra3.2, the chip flutes 204 are applied.

When the tool for corrugation machining of the inner hole of the cylinder sleeve of the MAN marine diesel engine is used, a blade 2 is placed in a positioning groove 102 and is pressed by a compression screw 4, and the whole tool is mounted on a tool mounting seat of a machine tool. When the blade 2 needs to be replaced, the corresponding blade 2 can be replaced by retracting the cutter.

Compare with traditional welding cutter, have the repeated positioning advantage, even change blade 2 also can be relaxed prevent that the hole ripple from appearing with the dislocation of semi-finishing ripple or disorderly phenomenon, the guarantee ripple is even.

The machining test verifies the validity, convenience, stability and universality of the cutter for machining the inner hole corrugation of the cylinder sleeve, and compared with a welding type cutter, the cutter can improve and stabilize the machining quality, the surface roughness value of the inner hole of the cylinder sleeve is reduced, the cutter is lifted to Ra1.6 from Ra6.3, the surface quality of a workpiece is improved, and the machining requirement of the MAN diesel engine cylinder sleeve upgrade version drawing on the inner hole corrugation is better met. The method not only completely meets the processing requirements of the corrugated groove Ra6.3 in the old-version drawing, but also is suitable for the production of the upgraded cylinder sleeve.

The cutting speed of the cutter can be higher, the cutting time is shortened, and the processing efficiency is obviously improved.

The blade has high durability, and compared with the original welding turning tool, the consumption of the cutter is reduced, and the stock of the cutter can be reduced.

When the welding tool is replaced, the whole tool needs to be disassembled and then a new tool needs to be clamped; however, the cutter only needs to replace the blade 2, so that the use is more convenient, the auxiliary time is shortened, and the production cost is reduced.

The cutter successfully processes multi-batch corrugated inner holes of new versions G60 and G80 cylinder sleeves, and has good economic and social benefits.

Claims

1. The utility model provides a cutter that is used for MAN marine diesel engine cylinder liner hole ripple to process, a serial communication port, including cutter body (1), the upside of cutter body (1) one end is equipped with installation face (101), be equipped with positioning groove (102) on installation face (101), blade (2) set up and fix a position in positioning groove (102), cutting edge (201) of blade (2) are the circular arc structure, cutting edge place face (202) of blade (2) and positioning surface (203) of blade (2) lateral part are not coplane, be equipped with corresponding mounting hole (3) on positioning groove (102) and blade (2), blade (2) compress tightly through housing screw (4), mounting hole (3) and housing screw (4) adaptation, cutting edge (201) the protrusion of blade (2) front end tip of cutter body (1).

2. The tool for corrugation machining of the inner bore of the cylinder liner of the MAN marine diesel engine according to claim 1, wherein the locating surface (203) of the insert (2) is a trapezoidal surface, which is adapted to the locating groove (102).

3. The tool for machining the inner hole corrugation of the cylinder liner of the MAN marine diesel engine according to claim 1, wherein the upper tool surface of the insert (2) is inclined in the front-rear direction and the left-right direction, and the cutting edge (201) at the front end of the insert (2) is higher than the cutting edge (201) at the rear end.

4. The tool for corrugation machining of the inner bore of the cylinder liner of the MAN marine diesel engine according to claim 1, wherein the upper rake surface of the insert (2) is inclined at an angle of 15 ± 0.5 ° in the front-rear direction and at an angle of 5 ± 0.5 ° in the left-right direction.

5. Tool for the corrugation machining of the inner bore of the cylinder liner of the MAN marine diesel engine according to claim 1, characterized in that the side of the mounting surface (101) facing away from the insert (2) is provided with chip flutes (103).

6. The tool for corrugating the inner hole of the cylinder liner of the MAN marine diesel engine as claimed in claim 1, wherein the cutting edge (201) of the blade (2) has a radius of 60mm-100mm.

7. The tool for corrugation machining of the inner bore of the cylinder liner of the MAN marine diesel engine according to claim 1, wherein the upper tool face of the insert (2) is provided with chip flutes (204) at a position close to the cutting edge (201).

8. The tool for corrugation machining of the inner holes of the cylinder liners of the MAN marine diesel engine according to claim 1, wherein the blades (2) are made of YG3X.

9. The tool for corrugation machining of the inner hole of the cylinder liner of the MAN marine diesel engine according to claim 1, wherein the end of the tool body (1) where the blade (2) is mounted is arranged obliquely, and the end of the tool body (1) is arranged obliquely backwards from top to bottom.