CN214601988U

CN214601988U - Boring cutter grain and boring cutter

Info

Publication number: CN214601988U
Application number: CN202120730446.5U
Authority: CN
Inventors: 段斌虎
Original assignee: Wuxi Lantian Diamond Co ltd
Current assignee: Wuxi Lantian Diamond Co ltd
Priority date: 2021-04-12
Filing date: 2021-04-12
Publication date: 2021-11-05
Anticipated expiration: 2031-04-12

Abstract

The utility model discloses a boring cutter grain and boring cutter, boring cutter grain wherein includes: the tool comprises a rod-shaped base body tool handle, wherein a chip groove is processed at one end of the base body tool handle, and a composite sheet mounting groove is processed at the end part of the chip groove; the composite sheet is fixed in the composite sheet mounting groove in a brazing mode. The utility model provides a boring cutter grain, it is small, shaft-like structure. The boring cutter adopting the boring cutter particles as the cutter head is suitable for machining deep holes with small apertures.

Description

Boring cutter grain and boring cutter

Technical Field

The utility model relates to a cutter field, concretely relates to boring cutter grain and boring cutter.

Background

A boring tool is a commonly used hole machining tool, and includes a boring tool bar and a blade mounted on the tool bar. The blade comprises a substrate made of hard alloy and a cutter head sintered and brazed on the substrate, wherein the cutter head is made of superhard and wear-resistant materials such as polycrystalline diamond and the like.

Fig. 1 shows an insert 100 comprising a triangular base 101, the base 101 being brazed at three corners with a cutting tip 102. The boring cutter using the cutter head has the following defects: on one hand, the boring cutter is difficult to machine deep holes with relatively small apertures due to the relatively large volume of the cutter head; on the other hand, the blade is fixedly arranged on the boring cutter rod through the mounting hole in the middle of the blade, and the blade cannot be repeatedly polished for use after being worn.

In order to solve the above technical problems of the existing boring cutter, it is necessary to modify the structure of the blade to reduce the volume thereof. Of course, correspondingly, the structure of the boring cutter rod matched with the boring cutter rod also needs to be modified.

In addition, related processing tools for processing the boring cutter particles and the boring cutter rod also need to be designed, and for example, when a cutter handle of the boring cutter particles is processed, a special cutter handle processing clamp needs to be used to clamp the cutter handle.

SUMMERY OF THE UTILITY MODEL

For solving at least one among the above-mentioned technical problem, the utility model provides a boring cutter grain, its technical scheme as follows:

a boring cutter granule, comprising:

the tool comprises a rod-shaped base body tool handle, wherein a chip groove is processed at one end of the base body tool handle, and a composite sheet mounting groove is processed at the end part of the chip groove;

the composite sheet is fixed in the composite sheet mounting groove in a brazing mode.

In some embodiments, the chip groove with compound piece mounting groove takes shape through the cutting mode, the chip groove with the bottom of compound piece mounting groove is the cutting surface structure, compound piece's upper surface with the bottom of chip groove is located the coplanar.

In some embodiments, an included angle between a connecting surface of the chip discharge groove and the composite sheet mounting groove and an axis of the base tool shank is less than 90 °.

In some embodiments, the composite sheet comprises a primary cutting edge, a secondary cutting edge, and a nose arc, the primary and secondary cutting edges forming a nose tangent to the nose arc.

In some embodiments, the base shank has a cross-sectional diameter of 3-8 mm.

In some embodiments, the base shank is cemented carbide.

In some embodiments, the compact is a polycrystalline diamond compact or a cubic boron oxide compact.

The utility model discloses another aspect provides a boring cutter, it includes: the boring cutter bar comprises a boring cutter bar body, and a cutter particle mounting hole is formed at one end of the boring cutter bar body; the hole boring cutter grain is any one of the hole boring cutter grains, and the hole boring cutter grain is assembled in the cutter grain mounting hole.

The utility model provides a boring cutter grain, it is small, shaft-like structure. The boring cutter adopting the boring cutter particles as the cutter head is suitable for machining deep holes with small apertures.

Drawings

FIG. 1 is a schematic view of a prior art blade;

fig. 2 is a schematic structural view of a boring cutter of the present invention at a first viewing angle;

fig. 3 is a schematic structural view of a boring cutter of the present invention at a second viewing angle;

fig. 4 is a schematic structural view of the boring bar of the present invention at a first viewing angle;

fig. 5 is a schematic view of a partial cross-sectional structure of the boring bar according to the present invention at a first view angle;

fig. 6 is a schematic structural view of the boring bar of the present invention at a second viewing angle;

fig. 7 is a schematic structural view of the boring tool according to the present invention at a viewing angle;

FIG. 8 is a schematic structural view of the shank after chip groove machining is completed;

FIG. 9 is a schematic structural view of the tool shank after the machining of the composite sheet mounting groove is completed;

fig. 10 is a schematic structural view of a tool shank machining fixture for a boring tool in an embodiment of the present invention;

FIG. 11 is a top view of the base of the tool shank machining fixture of the embodiment of FIG. 10;

FIG. 12 is a partial enlarged view of the middle shank processing fixture of the present invention shown in FIG. 10;

fig. 13 is a schematic structural view of a pressing block in the tool shank processing fixture of the boring tool grain of the present invention;

fig. 14 is a top view of a base of a tool shank machining fixture according to another embodiment of the present invention.

Detailed Description

In order to make the objects and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Summary of the application

The existing boring cutter has the defects that: on one hand, the boring cutter is difficult to machine deep holes with relatively small apertures due to the large volume of the used blade; on the other hand, the blade is fixedly arranged on the boring cutter rod through the mounting hole in the middle of the blade, and the blade cannot be repeatedly polished for use after being worn.

In order to solve the above technical problems of the existing boring cutter, it is necessary to modify the structure of the blade to reduce the volume thereof. Correspondingly, the structure of the boring cutter rod matched with the boring cutter rod needs to be modified.

In addition, a related processing tool for processing the modified boring cutter particles and boring cutter bars also needs to be designed, for example, when a tool shank of the boring cutter particles is processed, a special tool shank processing clamp needs to be used to clamp the tool shank.

Embodiments of boring inserts

The embodiment provides a small-volume rod-shaped boring cutter particle. The boring cutter adopting the boring cutter particles as the cutter head is suitable for machining deep holes with small apertures.

As shown in fig. 2 to 3, the boring cutter insert 10 provided in this embodiment includes a rod-shaped substrate holder 11 and a composite sheet 12, wherein:

a chip groove 111 is formed in one end of the base tool shank 11, and a composite sheet installation groove 112 is formed in the end portion of the chip groove 111. The base body handle of a knife 11 is the carbide material, and its cross-sectional diameter can set up according to specific spot facing work demand, if in some embodiments, the cross-sectional diameter of base body handle of a knife 11 is 3 ~ 8 mm. The composite sheet 12 is fixed in the composite sheet mounting groove 112 by brazing, and the composite sheet 12 may be a polycrystalline diamond composite sheet, a cubic boron nitride composite sheet, or the like.

It can be seen that the boring cutter particle 10 in the present embodiment has a rod shape as a whole, and the volume thereof is significantly reduced as compared with the block-shaped cutter blade 100 in the related art, so that it is suitable for machining a deep hole having a small bore diameter.

In addition, the rod-shaped boring cutter grain 10 can be conveniently inserted into the mounting hole of the cutter bar.

Optionally, in order to facilitate the machining and forming of the chip discharge groove 111 and the composite sheet installation groove 112, the chip discharge groove 111 and the composite sheet installation groove 112 are formed in a cutting manner, that is, the bottoms of the chip discharge groove 111 and the composite sheet installation groove 112 are both cut surfaces. As shown in fig. 2, the chip discharge groove 111 and the composite sheet installation groove 112 integrally form a stepped cutting structure. The upper surface of the composite sheet 12 is in the same plane as the bottom of the flutes 111.

Alternatively, as shown in fig. 3, the composite sheet 12 includes a main cutting edge 121, a secondary cutting edge 122 and a corner arc 123, and the main cutting edge 121 and the secondary cutting edge 122 form a corner by being tangent to the corner arc 123. Namely: the composite sheet 12 is generally triangular in cross-section. To ensure effective contact of the cutting edges with the workpiece, the major cutting edge 121 and the minor cutting edge 122 extend outwardly of the compact mounting slot 112. Optionally, the length of the primary cutting edge is longer than the length of the secondary cutting edge.

The boring cutter particle provided by the embodiment is of a small-volume rod-shaped structure. The boring cutter adopting the boring cutter particles as the cutter head is suitable for machining deep holes with small aperture and can improve the machining precision.

Boring bar embodiment

The embodiment provides a boring cutter rod, which can realize the installation and fixation of the rod-shaped boring cutter particles in the above embodiments to form a complete set of boring cutters.

As shown in fig. 4 to 7, the boring bar 20 provided in the present embodiment includes a boring bar body 21, and a first end of the boring bar body 21 is formed with a insert mounting hole 211 extending in a first direction and an insert locking hole 212 extending in a second direction and communicating with the insert mounting hole 211, wherein the second direction is perpendicular to the first direction.

As shown in fig. 7, the boring cutter bit 10 is first inserted into the bit mounting hole 211 and the composite sheet 12 of the boring cutter bit 10 is partially exposed outside the bit mounting hole 211. And then the locking piece is arranged in the cutter particle locking hole 212, so that the locking piece tightly presses the boring cutter particle 10, and the boring cutter particle 10 is locked and fixed. At this time, the boring cutter bar 10 and the boring cutter bar 20 are assembled into a complete boring cutter.

Optionally, a first internal thread is formed in the blade locking hole 212. Correspondingly, the locking piece is a knife grain locking screw, and a first external thread matched with the first internal thread is formed on the knife grain locking screw. After the boring cutter 10 is inserted into the cutter mounting hole 211 and the position of the boring cutter 10 is adjusted, the cutter locking screw is screwed into the cutter locking hole 212, and the top end of the locking screw can press the boring cutter 10.

With continued reference to fig. 4-7, the insert mounting hole 211 extends through the boring bar body 21 in a first direction, the insert mounting hole 211 including an insert receiving hole section 211a having a first bore diameter and an insert adjusting hole section 211b having a second bore diameter, wherein: the first aperture is matched with the outer diameter of the boring cutter particle 10 to be installed, and the second aperture is smaller than the outer diameter of the boring cutter particle 10 to be installed.

Optionally, a second internal thread is formed in the insert adjusting hole section 211 b. Correspondingly, the boring cutter bar in the embodiment further comprises a cutter particle adjusting screw, and a second external thread matched with the second internal thread is formed on the cutter particle adjusting screw. After the installation of the boring cutter particle 10 is completed, the cutter particle adjusting screw is screwed in the cutter particle adjusting hole section 211b, so that the top end of the cutter particle adjusting screw abuts against the bottom of the boring cutter particle 10.

After a certain period of use, the boring cutter particles 10 are worn away, and the cutting edge of the composite sheet 12 cannot effectively contact the workpiece. At this time, the insert locking screw is screwed outwards to loosen the boring insert 10, and then the insert adjusting screw is screwed inwards continuously, so that the boring insert 10 moves outwards under the pushing of the insert adjusting screw, and the composite sheet 12 is exposed out of the insert mounting hole 211 again, and finally the cutting edge of the composite sheet 12 is in effective contact with the workpiece again.

It can be seen that, by setting the insert mounting hole 211 as an insert receiving hole section 211a and an insert adjusting hole section 211b, and setting an insert adjusting screw in the insert adjusting hole section 211b, the position adjustment of the boring insert can be achieved, thereby prolonging the service life of the boring insert. In addition, the composite sheet 12 may be polished for reuse.

With continued reference to fig. 4-7, the angle a between the direction of extension of the insert mounting hole 211 (the first direction) and the axis of the boring bar body 21 is less than 90 °, such as 30 °. Namely: the cutting insert mounting hole 211 is arranged obliquely relative to the axial direction of the cutter bar body 21, and the cutting insert mounting hole 211 penetrates through the first end of the cutter bar body 21 obliquely. In a specific embodiment, the included angle a is specifically selected, so that the included angle between the main cutting edge of the composite sheet 12 and the axial direction of the cutter bar body 21 can be adjusted, and the machining roughness of the surface of the workpiece can be controlled.

Optionally, in order to mount the boring bar 20 in the present embodiment on the machine table, the mounting head 22 is connected to the second end of the boring bar 20, and the mounting head 22 is provided with a mounting hole 221. The boring bar 20 can be mounted to the rotary machine table through the mounting hole 221 of the mounting head 22. The rotary machine table drives the boring cutter to rotate at a high speed, so that the workpiece is cut.

Tool shank machining clamp for boring tool grains

Referring to fig. 8 and 9, in the manufacturing process of the boring cutter granule 10, first, the machining of the tool shank 11 is completed, that is, the chip grooves 111 and the composite sheet installation grooves 112 are sequentially cut on the tool shank 11.

The purpose of this embodiment is to provide a handle machining fixture 30 for a boring cutter, where the handle machining fixture 30 can clamp a rod-shaped handle 11, so that a machining device (such as a laser cutting device) can sequentially cut out a chip groove 111, a composite sheet installation groove 112, and other structures on a handle 11 to be machined.

As shown in fig. 10 to 13, the shank processing jig 30 for a boring cutter in the present embodiment includes a base 31, a mounting boss 34, a pressing block 36, and the like. Wherein:

a plurality of first stoppers 32 are arranged at a first edge of the base 31 along a first horizontal direction (arrow M direction in the figure), an accommodating groove 33 for accommodating the tool holder 11 to be processed is formed between every two adjacent first stoppers 32, and the width of the accommodating groove 33 in the first horizontal direction is greater than the outer diameter of the tool holder 11 to be processed. Namely: after placing the to-be-processed tool holder 11 to the accommodating groove 33, a gap exists between the to-be-processed tool holder 11 and the side wall of the accommodating groove 33.

The mounting boss 34 is disposed on the base 31 and extends along the first horizontal direction, and a plurality of first mounting holes 35 corresponding to the receiving grooves 33 one to one are disposed on the mounting boss 34 along the first horizontal direction.

The pressing block 36 is provided with a second mounting hole 361 which penetrates through the pressing block 36 from top to bottom and is matched with the first mounting hole 35, and the bottom of the first end of the pressing block 36 is provided with a pressing tongue 362 extending downwards.

The utility model discloses a handle of a knife adds clamping apparatus 30's application method as follows:

firstly, placing a tool shank 11 to be processed into the accommodating groove 33; then, the pressing block 36 is placed on the mounting boss 34, the angle of the pressing block 36 is adjusted, so that the second mounting hole 361 on the pressing block 36 is vertically communicated with the first mounting hole 35, and the pressing tongue 362 on the pressing block 36 is clamped into the gap between the to-be-machined tool shank 11 and the accommodating groove 33, so that the to-be-machined tool shank 11 is pressed tightly; finally, the pressing block locking member is inserted into the second mounting hole 361 and the first mounting hole 35, thereby fixing the pressing block 36.

Optionally, the first mounting hole 35 is a threaded hole, the second mounting hole 361 is a through hole with a smooth inner wall, and correspondingly, the pressing block locking member includes an inner hexagonal screw, the inner hexagonal screw is matched with the first mounting hole 35 and the second mounting hole 361, and the inner hexagonal screw is screwed into the second mounting hole 361 and the first mounting hole 35 from top to bottom, so that the pressing block 36 can be fixed.

Of course, in order to compress the to-be-machined tool shank 11, the corresponding pressing block needs to be replaced according to the outer diameter of the to-be-machined tool shank 11. It is thereby ensured that the tongue 362 can be inserted into and clamped in the gap between the shank 11 to be machined and the receiving groove 33.

In a specific embodiment, the width of the receiving groove 33 is fixed. Therefore, only the pressing blocks 36 having the pressing tongues 362 with different widths need to be provided for the tool shanks 11 to be machined with different outer diameters, so that the tool shank machining fixture 30 of the present embodiment can clamp the tool shanks 11 to be machined with different sizes.

Optionally, as shown in fig. 12 and 13, the pressing tongue 362 is provided with a pressing curved surface matching the outer contour of the tool holder 11 to be processed. When the pressing block 36 presses the tool shank 11 to be machined, the pressing curved surface on the pressing tongue 362 is tightly attached to the tool shank 11 to be machined. Therefore, the clamping stability of the pressing block 36 on the to-be-processed tool shank 11 can be improved, and the to-be-processed tool shank 11 is prevented from sliding accidentally.

Optionally, as shown in fig. 10, a plurality of second stoppers 37 corresponding to the first stoppers 32 one to one are disposed along the first horizontal direction at a second edge of the base 31 opposite to the first edge, a pressing block fixing groove 38 is formed between two adjacent second stoppers 37, and a width of the pressing block fixing groove 38 in the first horizontal direction matches a width of the pressing block 36. Specifically, as shown in fig. 11, the press piece fixing groove 38 and the corresponding first mounting hole 35 and the receiving groove 33 are on the same axis L in the second horizontal direction (the N direction in the drawing). When the pressing block 36 presses the tool shank 11 to be processed, the second end of the pressing block 36 is clamped into the corresponding pressing block fixing groove 38. Through setting up briquetting fixed slot 38, can realize fixed, spacing to briquetting 36, prevent that briquetting 36 from rotating by accident, influencing the centre gripping effect.

As shown in fig. 11, in one embodiment, the second horizontal direction (N direction in the figure) and the first horizontal direction (arrow M direction in the figure) are perpendicular to each other. That is, the axis L of the compact fixing groove 38, the first mounting hole 35 and the receiving groove 33 is perpendicular to the first horizontal direction. The tool shank machining jig 30 in this embodiment is suitable for clamping a tool shank 11 to be machined, which requires machining of the chip grooves 111.

In another embodiment, as shown in fig. 14, the angle between the second horizontal direction (the direction of N in the figure) and the first horizontal direction (the direction of arrow M in the figure) is less than 90 °. That is, the included angle between the axis L where the briquette fixing groove 38, the first mounting hole 35 and the receiving groove 33 are located and the first horizontal direction is less than 90 °. The tool shank machining clamp 30 in the embodiment is suitable for clamping a tool shank 11 to be machined, which needs to be machined with the composite sheet installation groove 112.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A boring cutter grain, characterized in that, the boring cutter grain includes:

2. The boring cutter particle as claimed in claim 1, wherein the chip groove and the composite particle mounting groove are formed by cutting, the chip groove and the bottom of the composite particle mounting groove are both of a cut surface structure, and the upper surface of the composite sheet and the bottom of the chip groove are located on the same plane.

3. The boring cutter particle of claim 2, wherein an included angle between a connecting surface of the chip groove and the composite sheet mounting groove and an axis of the base shank is less than 90 °.

4. The boring tool grain of claim 2, wherein the composite sheet comprises a main cutting edge, a secondary cutting edge and a nose arc, and the main cutting edge and the secondary cutting edge form a nose tangent to the nose arc.

5. The boring cutter particle as claimed in claim 1, wherein the cross-sectional diameter of the base shank is 3 to 8 mm.

6. The boring tool insert of claim 1, wherein the substrate shank is cemented carbide.

7. The boring tool particle of claim 1, wherein the compact is a polycrystalline diamond compact or a cubic boron oxide compact.

8. A boring tool, characterized in that the boring tool comprises:

the boring cutter bar comprises a boring cutter bar body, and a cutter particle mounting hole is formed at one end of the boring cutter bar body;

the hole boring cutter grain is the hole boring cutter grain as claimed in any one of claims 1 to 7, and the hole boring cutter grain is assembled in the cutter grain mounting hole.