CN215698055U

CN215698055U - Guiding boring cutter

Info

Publication number: CN215698055U
Application number: CN202121911338.4U
Authority: CN
Inventors: 周旭东
Original assignee: Sichuan Leilian Auto Parts Co ltd
Current assignee: Sichuan Leilian Auto Parts Co ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2022-02-01
Anticipated expiration: 2031-08-16

Abstract

The utility model discloses a guide boring cutter, which comprises: the cutter body comprises a first step, a second step and a third step, and the first step, the second step and the third step are sequentially connected and have sequentially increased diameters; the free end of the first step is provided with a cutter groove, and the blade is adjustably arranged in the cutter groove; 3-6 strip-shaped grooves are uniformly distributed at the free end of the first step along the circumferential direction, a diamond guide strip is embedded in each strip, and one diamond guide strip is symmetrical to the cutting edge of the blade along the circumferential direction; the second step and the third step have the same structure as the first step. The utility model solves the problems of insufficient cutting rigidity and lower processing efficiency of the traditional boring cutter.

Description

Guiding boring cutter

Technical Field

The utility model relates to a boring cutter, in particular to a guide boring cutter.

Background

For the processing of the stepped deep hole, the traditional boring cutter has the disadvantages of insufficient rigidity, lower cutting efficiency, serious cutter abrasion and short service life. And each different-specification stepped hole needs to be replaced by a cutter, so that the problem that the coaxiality of the machined stepped hole is low is caused, more cutters and cutter changing time are needed, and the machining cost is increased invisibly.

The person skilled in the art therefore endeavors to develop a guide boring tool.

SUMMERY OF THE UTILITY MODEL

In view of the defects in the prior art, the utility model discloses a guide boring cutter, and aims to solve the technical problems that the traditional boring cutter is insufficient in cutting rigidity and low in machining efficiency.

To achieve the above object, the present invention provides a guide boring cutter, comprising: the cutter body comprises a first step, a second step and a third step, and the first step, the second step and the third step are sequentially connected and have sequentially increased diameters; the free end of the first step is provided with a cutter groove, and the blade is adjustably arranged in the cutter groove; 3-6 strip-shaped grooves are uniformly distributed at the free end of the first step along the circumferential direction, a diamond guide strip is embedded in each strip-shaped groove, and one diamond guide strip is symmetrical to the cutting edge of the blade along the circumferential direction; the second step and the third step have the same structure as the first step.

Preferably, the first step, the second step and the third step are internally provided with internally cooled flushing holes.

Through setting up interior cold flushing hole, rivers are through flushing hole blowout erode the smear metal, reduce smear metal and pore wall scotch, reduce the production of the accumulated bits tumour of knife tip, improve the life of blade.

Preferably, the axial distance between the diamond guide strip and the tool tip of the blade is 0.15-0.35 mm. The blade and the diamond guide strip form a tool bit, and the rigidity of the tool bit can be increased by controlling the size of the overhanging length of the tool tip of the blade, so that the generation of vibration lines is prevented. Meanwhile, the tool nose is provided with a chamfer with the radius of 0.1mm so as to reduce the cutting resistance of the tool, ensure the cutting to be light and fast and prevent the generation of vibration lines.

Preferably, the radial size difference between the diamond guide strip and the tool tip of the blade is 0.002-0.004 mm, and the tool can cut product materials under the condition that the diamond guide strip plays a reliable guiding role. In addition, the radial dimension of the blade edge of the blade at the position of 2mm in the axial direction is smaller than the radial dimension of the blade tip by 0.002mm, so that the blade edge can be reliably ensured to have the function of polishing, the roughness of the hole wall is ensured, and the vibration of the cutter is prevented.

Preferably, the end part, close to each diamond guide strip, of the cutter body is provided with a degassing groove communicated with the strip-shaped groove, and the degassing groove is used for being better attached to the strip-shaped groove when the diamond guide strips are installed.

Preferably, the second step is provided with two groups of strip-shaped grooves and two groups of diamond guide bars, and when a hole with a larger diameter is machined, the strength of the cutter body is increased by increasing the diamond guide bars.

Preferably, an adjusting device corresponding to the blade is arranged in the cutter body, and the adjusting device comprises a pressing block and two adjusting columns; the cutter body is provided with a mounting groove for mounting the pressing block and two cylindrical cavities for mounting the adjusting column, and the two cylindrical cavities are arranged on two sides of the mounting groove; a screw hole is formed in the pressing block, a first screw is rotatably mounted in the screw hole, a first threaded hole which is coaxial and communicated with the screw hole is formed in the cutter body, and the first threaded hole is in threaded connection with the first screw; a second threaded hole which is coaxial and communicated with the cylindrical cavity is formed in the cutter body, and a second screw rod which is abutted against the adjusting column is connected with the second threaded hole in a threaded manner; the pressing block and the two adjusting columns are provided with inclined planes which are abutted to the blades.

Preferably, the blade comprises a mounting surface, a pressing surface and an adjusting surface; the mounting surface and the pressing surface are oppositely arranged, the mounting surface abuts against the side wall of the cutter groove, and the pressing surface abuts against the inclined surface of the pressing block; the adjusting surface is opposite to the cutting edge of the blade and is abutted against the inclined surface of the adjusting column.

Preferably, the two cylindrical cavities are parallel to each other, and the two cylindrical cavities are symmetrically arranged relative to the screw hole.

Preferably, the cylindrical cavities and the screw holes are arranged in a staggered manner.

Through adjusting device's setting, twist and move first screw rod, the blade is compressed tightly or is loosened by the briquetting, and the inclination of blade can be adjusted through the inclined plane of briquetting simultaneously to the dismantlement of the blade of being convenient for to satisfy the processing in different holes that require. By screwing the first screw rod, the two adjusting columns support the blade, and the extension size of the blade in the radial direction is adjusted to meet the processing requirement.

The utility model has the beneficial effects that:

through the tool bit that sets up the three step of different diameters, to the processing of ladder deep hole, can once only all process out each shoulder hole under the condition of not tool changing, but also can guarantee the axiality of each shoulder hole. Therefore, more cutters and cutter changing time are not needed, and the processing cost is reduced. In addition, through the arrangement of the diamond guide strip, the strength of the cutter body and the cutting rigidity of the cutter head are increased, the cylindricity and the precision of the hole are improved, and the requirement of high hole machining roughness is met. The problems of insufficient rigidity, low cutting efficiency, serious tool abrasion and short service life of the traditional boring tool are solved.

Drawings

FIG. 1 is a schematic overall structure diagram of a first embodiment of the present invention;

FIG. 2 is a schematic front view of a first embodiment of the present invention;

FIG. 3 is a schematic view of a diamond-free steering bar according to a first embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 1 at A;

FIG. 5 is an enlarged view of a portion of FIG. 3 at C;

FIG. 6 is a schematic view of the internal structure of FIG. 3 at C;

FIG. 7 is a schematic view of the internal adjustment mechanism of FIG. 6;

FIG. 8 is an enlarged schematic view at B in FIG. 2;

FIG. 9 is a schematic cross-sectional view taken along line D of FIG. 8;

FIG. 10 is a schematic cross-sectional view taken along line E of FIG. 8;

fig. 11 is a front view of a second embodiment of the present invention.

In the above drawings: 1. a cutter body; 11. a first step; 12. a second step; 13. a third step; 14. a cutter groove; 15. a strip-shaped groove; 16. a degassing tank; 17. mounting grooves; 18. a cylindrical cavity; 2. a blade; 21. a mounting surface; 22. a compression surface; 23. adjusting the surface; 3. a diamond guide strip; 4. an adjustment device; 41. briquetting; 411. a screw hole; 42. an adjustment column; 51. a first threaded hole; 52. and a second threaded hole.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples, wherein the terms "upper", "lower", "left", "right", "inner", "outer", and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is for convenience and simplicity of description, and does not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular manner, and thus should not be construed as limiting the present invention. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1 to 4, the present invention provides a guide boring cutter, including: the cutter comprises a cutter body 1 and a blade 2, wherein the cutter body 1 comprises a first step 11, a second step 12 and a third step 13, and the first step 11, the second step 12 and the third step 13 are sequentially connected and have sequentially increased diameters; the free end of the first step 11 is provided with a cutter groove 14, and the blade 2 is adjustably arranged in the cutter groove 14; 3 strip-shaped grooves 15 are uniformly distributed at the free end of the first step 11 along the circumferential direction, a diamond guide strip 3 is embedded in each strip-shaped groove 15, and one diamond guide strip 3 is symmetrical to the cutting edge of the blade 2 along the circumferential direction; the second step 12 and the third step 13 have the same structure as the first step 11. In addition, the first step 11, the second step 12 and the third step 13 are internally provided with inner-cooling flushing holes, and water flow is sprayed out through the flushing holes to wash away chips by arranging the inner-cooling flushing holes, so that the chips and the hole wall are prevented from being scratched, the generation of accumulated chips of a cutter tip is reduced, and the service life of the blade 2 is prolonged.

As shown in fig. 8, the axial distance H between the diamond guide strip 3 and the tip of the insert 2 is 0.2 mm. The blade 2 and the diamond guide strip 3 form a tool bit, and the size of the overhanging length of the tool tip of the blade 2 is controlled, so that the rigidity of the tool bit can be increased, and the generation of vibration lines is prevented. Meanwhile, the tool nose is provided with a chamfer with the radius of 0.1mm so as to reduce the cutting resistance of the tool, ensure the cutting to be light and fast and prevent the generation of vibration lines. In addition, the radial size difference between the diamond guide strip 3 and the tool tip of the blade 2 is 0.002mm, and the tool can cut product materials under the condition that the diamond guide strip 3 plays a reliable guiding role. In addition, the radial dimension of the position of 2mm in the axial direction of the cutting edge of the blade 2 is smaller than the radial dimension of the tool tip by 0.002mm, so that the cutting edge is reliably ensured to have the function of polishing, the roughness of the hole wall is ensured, and the vibration of the tool is prevented.

In this embodiment, through the tool bit that sets up the three step of different diameters, to the processing of ladder deep hole, can all process out each shoulder hole once only under the condition of not tool changing, but also can guarantee the axiality of each shoulder hole. Therefore, more cutters and cutter changing time are not needed, and the processing cost is reduced. In addition, through the arrangement of the diamond guide strip 3, the strength of the cutter body 1 and the cutting rigidity of the cutter head are increased, the hole cylindricity and the hole accuracy are improved, and the requirement of high hole machining roughness is met. The problems of insufficient rigidity, low cutting efficiency, serious tool abrasion and short service life of the traditional boring tool are solved.

As shown in fig. 5, the end of the cutter body 1 close to each diamond guide bar 3 is provided with a degassing groove 16 communicated with the strip-shaped groove 15 for ensuring that the diamond guide bars 3 can be better attached to the strip-shaped groove 15 when being installed.

As shown in fig. 11, the utility model provides a guide boring tool, and the second embodiment is that two groups of strip-shaped grooves 15 and two groups of diamond guide strips 3 are arranged on a second step 12, and when a hole with a larger diameter is machined, the strength of the tool body 1 is increased by increasing the diamond guide strips 3.

As shown in fig. 5 to 10, the cutter body 1 is provided with an adjusting device 4 corresponding to the blade 2, and the adjusting device 4 comprises a pressing block 41 and two adjusting columns 42; the cutter body 1 is provided with a mounting groove 17 for mounting the pressing block 41 and two cylindrical cavities 18 for mounting the adjusting columns 42, and the two cylindrical cavities 18 are arranged at two sides of the mounting groove 17; a screw hole 411 is formed in the pressing block 41, a first screw is rotatably mounted in the screw hole 411, a first threaded hole 51 which is coaxial and communicated with the screw hole 411 is formed in the cutter body 1, and the first threaded hole 51 is in threaded connection with the first screw; a second threaded hole 52 which is coaxial and communicated with the cylindrical cavity 18 is formed in the cutter body 1, and a second screw rod which is abutted to the adjusting column 42 is connected with the second threaded hole 52 in an internal thread manner; the pressing block 41 and the two adjusting columns 42 are provided with inclined planes which are abutted against the blade 2. Meanwhile, the two cylindrical cavities 18 are parallel to each other, the two cylindrical cavities 18 are symmetrically arranged relative to the screw hole 411, and the cylindrical cavities 18 and the screw hole 411 are arranged in a staggered manner. Furthermore, the insert 2 comprises a mounting face 21, a pressing face 22 and an adjusting face 23; the mounting surface 21 and the pressing surface 22 are oppositely arranged, the mounting surface 21 abuts against the side wall of the cutter groove 14, and the pressing surface 22 abuts against the inclined surface of the pressing block 41; the adjusting surface 23 is opposite to the cutting edge of the blade 2, and the adjusting surface 23 is abutted against the inclined surface of the adjusting column 42.

In this embodiment, through the setting of adjusting device 4, twist and move first screw rod, blade 2 is compressed tightly or is loosened by briquetting 41, is convenient for the dismantlement of blade 2, can adjust the inclination of blade 2 through the inclined plane of briquetting 41 simultaneously to satisfy the processing in the hole of different requirements. By screwing the first screw rod, the two adjusting columns 42 are pressed against the blade 2, and the extension size of the blade 2 in the radial direction is adjusted, so that the processing requirement is met.

The foregoing detailed description of the preferred embodiments of the utility model has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. A pilot boring tool, comprising: the cutter comprises a cutter body (1) and a blade (2), wherein the cutter body (1) comprises a first step (11), a second step (12) and a third step (13), and the first step (11), the second step (12) and the third step (13) are sequentially connected and have sequentially increased diameters; a cutter groove (14) is formed in the free end of the first step (11), and the blade (2) is adjustably arranged in the cutter groove (14); 3-6 strip-shaped grooves (15) are uniformly distributed at the free end of the first step (11) along the circumferential direction, a diamond guide strip (3) is embedded in each strip-shaped groove (15), and one diamond guide strip (3) is symmetrical to the cutting edge of the blade (2) along the circumferential direction; the second step (12) and the third step (13) have the same structure as the first step (11).

2. A guide boring tool as claimed in claim 1, wherein:

and inner-cooling flushing holes are formed in the first step (11), the second step (12) and the third step (13).

3. A guide boring tool as claimed in claim 1, wherein:

the axial distance (H) between the diamond guide strip (3) and the tool tip of the blade (2) is 0.15-0.35 mm.

4. A guide boring tool as claimed in claim 1, wherein:

the radial size difference between the diamond guide strip (3) and the tool tip of the blade (2) is 0.002-0.004 mm.

5. A guide boring tool as claimed in claim 1, wherein:

the end part of the cutter body (1) close to each diamond guide strip (3) is provided with a degassing groove (16) communicated with the strip-shaped groove (15).

6. A guide boring tool as claimed in claim 1, wherein:

and two groups of strip-shaped grooves (15) and two groups of diamond guide strips (3) are arranged on the second step (12).

7. A guide boring tool as claimed in claim 1, wherein:

an adjusting device (4) corresponding to the blade (2) is arranged in the cutter body (1), and the adjusting device (4) comprises a pressing block (41) and two adjusting columns (42); the cutter body (1) is provided with an installation groove (17) for installing the pressing block (41) and two cylindrical cavities (18) for installing the adjusting columns (42), and the two cylindrical cavities (18) are arranged on two sides of the installation groove (17); a screw hole (411) is formed in the pressing block (41), a first screw is rotatably mounted in the screw hole (411), a first threaded hole (51) which is coaxial and communicated with the screw hole (411) is formed in the cutter body (1), and the first threaded hole (51) is in threaded connection with the first screw; a second threaded hole (52) which is coaxial and communicated with the cylindrical cavity (18) is formed in the cutter body (1), and a second screw rod which is abutted against the adjusting column (42) is connected with the second threaded hole (52) in an internal thread manner; the pressing block (41) and the two adjusting columns (42) are provided with inclined planes which are abutted against the blade (2).

8. The guide boring tool of claim 7, wherein:

the blade (2) comprises a mounting surface (21), a pressing surface (22) and an adjusting surface (23); the mounting surface (21) and the pressing surface (22) are oppositely arranged, the mounting surface (21) is abutted against the side wall of the cutter groove (14), and the pressing surface (22) is abutted against the inclined surface of the pressing block (41); the adjusting surface (23) is opposite to the cutting edge of the blade (2), and the adjusting surface (23) is abutted to the inclined surface of the adjusting column (42).

9. The guide boring tool of claim 7, wherein:

the two cylindrical cavities (18) are parallel to each other, and the two cylindrical cavities (18) are symmetrically arranged relative to the screw hole (411).

10. A guide boring tool as claimed in claim 9, wherein:

the cylindrical cavities (18) and the screw holes (411) are arranged in a staggered mode.