CN218460887U

CN218460887U - Cutter for processing composite stepped hole

Info

Publication number: CN218460887U
Application number: CN202222671055.8U
Authority: CN
Inventors: 魏志勇; 祁宝雷; 高运强; 李新磊
Original assignee: Hebei Henggong Precision Equipment Co ltd
Current assignee: Hebei Henggong Precision Equipment Co ltd
Priority date: 2022-10-11
Filing date: 2022-10-11
Publication date: 2023-02-10
Anticipated expiration: 2032-10-11

Abstract

The utility model relates to the field of machining, in particular to a cutter for machining a composite stepped hole, which mainly comprises a cutter bar, a cutter head arranged below the cutter bar and a blade arranged in the cutter head; the side surface of the cutter head is inwards concavely provided with a chip groove, the cutter head is divided into a tail part connected with the cutter bar and a rod part connected with the tail part, and the rod part is provided with a plurality of cutting edges and chamfer edges; the method is characterized in that: the cutting blade, the chamfer cutting edge and the chip groove are inclined relative to the central axis of the cutter bar, and the radial inclination angle A is 2-3 degrees; the axial inclination angle B is 2-3 degrees. The utility model discloses an optimize cutting edge, chamfer sword, chip groove to and the inclination of blade, design their radial inclination A and axial inclination B for 2-3 degrees, be favorable to discharging iron fillings and can carry out the finish machining with the direct machine-shaping of work piece.

Description

Cutter for processing composite stepped hole

Technical Field

The utility model relates to a machining field, concretely relates to cutter for processing compound shoulder hole.

Background

In the process of processing the workpiece, the efficiency of the straight groove and straight cutter cutting tool for processing the stepped workpiece is low, the processed size is unstable, and the precision is not high.

Chinese patent application No. 201820723074.1 discloses a shoulder hole processing boring cutter, and it includes installation head, handle of a knife, tool bit, boring blade, installation head, handle of a knife and tool bit forming piece as an organic whole, the installation head is used for installing the boring cutter in the milling machine pivot, the tool bit has a plurality ofly, and follows handle of a knife axial evenly distributed, the tool bit has the ladder of at least two ranks, and the ladder height reduces along the direction of feed gradually, and the boring blade is all installed to every ladder side of tool bit, the boring blade is along treating the cutting of machining hole inner wall direction. Although the boring tool disclosed in this patent can form a stepped hole at one time, it is difficult to ensure the accuracy of the stepped hole when machining the stepped hole because the tool bit and the boring blade are easily worn and rigid vibration is generated during machining. And because a plurality of boring blades and a mounting surface have gaps, finishing can not be realized.

SUMMERY OF THE UTILITY MODEL

The problem that the precision is not high when solving the compound shoulder hole of current cutter processing, the utility model provides a cutter for processing compound shoulder hole.

In order to achieve the above object, the present invention provides a technical solution for solving the technical problem:

a cutter for machining a composite stepped hole is used for finish machining of a workpiece and comprises a cutter bar, a cutter head and a blade, wherein the cutter head is arranged below the cutter bar; the side surface of the cutter head is inwards concavely provided with a chip groove, the cutter head is divided into a tail part connected with the cutter bar and a rod part connected with the tail part, and the rod part is provided with a plurality of cutting edges and chamfer edges; the method is characterized in that: the cutting blade, the chamfer cutting edge and the chip groove are inclined relative to the central axis Y of the cutter bar, and the radial inclination angle A is 2-3 degrees; the axial inclination angle B is 2-3 degrees

Furthermore, the cutting edge is divided into a first cutting edge, a second cutting edge, a third cutting edge and a fourth cutting edge from the tool nose to the tool tail.

Further, the chamfering edge is divided into a first chamfering edge, a second chamfering edge and a third chamfering edge; the first chamfer angle edge is arranged at the joint of the first cutting edge and the second cutting edge, the second chamfer angle edge is arranged at the joint of the second cutting edge and the third cutting edge, and the third chamfer angle edge is arranged at the joint of the fourth cutting edge and the tail.

Furthermore, four chip grooves are formed in the cutter head, and are symmetrically distributed along the axis of the cutter head.

Further, the blade is a plate-shaped body and comprises an exposed surface and a binding surface which are oppositely arranged, an arc-shaped surface and a step surface; the arc-shaped face is directly connected with one end of the step face, and the other end of the arc-shaped face is connected with the other end of the step face through an end face.

Furthermore, the arc-shaped surface is attached to the inner portion of the chip groove, and the step surface is consistent with the outer surface of the cutter head in shape and protrudes out of the outer surface of the cutter head.

Furthermore, the blade is built-up welded in the chip groove.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses an optimize cutting edge, chamfer sword, chip groove to and the inclination of blade, design their radial inclination A and axial inclination B for 2-3 degrees, be favorable to discharging iron fillings and can carry out the finish machining with the direct machine-shaping of work piece.

Drawings

Fig. 1 is a schematic perspective view of a cutting tool provided by the present invention;

FIG. 2 is a perspective view of a cutting head;

FIG. 3 is a schematic view of the blade configuration;

FIG. 4 is a schematic view of a radial tilt angle A;

FIG. 5 is an enlarged view of a portion of FIG. 4;

FIG. 6 is a schematic view of an axial tilt angle B;

in the figure: a cutter bar 1; a tool bit 2; a tail portion 21; a stem portion 22; a chip groove 23; a first cutting edge 221; a second cutting edge 222; the third cutting edge 223; a fourth cutting edge 224; a first chamfer edge 225; a second chamfer edge 226; a third chamfer edge 227; a blade 3; a bonding surface 31; an arcuate surface 32; a step surface 33; end face 34.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, the present embodiment provides a tool for machining a composite stepped hole, which includes a tool bar 1, a tool bit 2 disposed below the tool bar 1, and a blade 3 mounted in the tool bit 2. The cutter bar 1 and the cutter head 2 are integrally formed.

As shown in fig. 2, the cutting head 2 is divided into a tail portion 21 connected to the shank 1 and a shank portion 22 connected to the tail portion 21. The shank 22 has a plurality of cutting edges and chamfer edges, and the cutting edges are divided into a first cutting edge 221, a second cutting edge 222, a third cutting edge 223, and a fourth cutting edge 224 in the direction from the tip to the tail. The chamfer edge is divided into a first chamfer edge 225, a second chamfer edge 226, and a third chamfer edge 227. The first chamfer edge 225 is disposed at a joint between the first cutting edge 221 and the second cutting edge 222, the second chamfer edge 226 is disposed at a joint between the second cutting edge 222 and the third cutting edge 223, and the third chamfer edge 227 is disposed at a joint between the fourth cutting edge 224 and the tail 21.

The side surface of the cutter head 2 is inwards provided with a scrap discharge groove 23 for discharging scrap iron. In the embodiment, the four chip discharge grooves 23 are arranged, and the four chip discharge grooves 23 are symmetrically distributed along the axis of the tool bit 2, so that the phenomena of chip winding, chip scratching on the surface of a workpiece and the like in the cutting process are reduced.

As shown in fig. 3, the blade 3 is a plate-shaped body, and includes an exposed surface and a joint surface 31, which are oppositely disposed, and an arc surface 32 and a step surface 33, where the arc surface 32 and the step surface 33 are directly connected at one end and the other end is connected through an end surface 34. The arc-shaped surface 32 is attached to the inner portion of the chip groove 23, the step surface 33 is in the shape consistent with the shape of the outer surface of the cutter head 2, and the blade 3 protrudes out of the outer surface of the cutter head 2.

As shown in fig. 4 to 6, the blade 3 is an alloy tool, and is built in the chip groove 23 after the tool bar 1 and the tool bit 2 are cast, so that rigid vibration generated by the blade 3 during cutting is eliminated, and the machining precision is improved.

The cutting edge, the chamfer edge and the chip groove 23, the blade 3 is inclined relative to the central axis Y of the cutter bar, and the radial inclination angle A is 2-3 degrees; the axial inclination angle B is 2-3 degrees, and the arrangement of the inclination angle structure is more favorable for discharging scrap iron and can directly finish and mold the workpiece.

When the tool is operated, for processing a single blind hole, an operator can firstly drill a blind hole on a workpiece through the first cutting edge 221. For the step hole machining, an operator may first drill a first blind hole in the workpiece through the first cutting edge 221, and then drill a second blind hole in the workpiece through the first chamfer edge 225 and the second cutting edge 222, so that the first blind hole and the second blind hole are machined at one time, and the coaxial precision is high. If more stepped holes need to be machined, the holes are pushed downwards according to the machining method.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made without departing from the gist of the present invention within the scope of knowledge possessed by those skilled in the art.

Claims

1. A cutter for machining a composite stepped hole comprises a cutter bar (1), a cutter head (2) arranged below the cutter bar (1), and a blade (3) arranged in the cutter head (2); the side surface of the cutter head (2) is inwards concavely provided with a chip groove (23), the cutter head (2) is divided into a tail part (21) connected with the cutter bar (1) and a rod part (22) connected with the tail part (21), and the rod part (22) is provided with a plurality of cutting edges and chamfer edges; the method is characterized in that: the cutting edge, the chamfer edge and the chip groove (23), the blade (3) is inclined relative to the central axis Y of the cutter bar (1), and the radial inclination angle A is 2-3 degrees; the axial inclination angle B is 2-3 degrees.

2. The tool for machining a composite stepped hole according to claim 1, wherein: the cutting edge is divided into a first cutting edge (221), a second cutting edge (222), a third cutting edge (223) and a fourth cutting edge (224) from the blade tip to the blade tail.

3. The tool for machining a composite stepped hole according to claim 2, wherein: the chamfering edge is divided into a first chamfering edge (225), a second chamfering edge (226) and a third chamfering edge (227); the first chamfer edge (225) is arranged at the joint of the first cutting edge (221) and the second cutting edge (222), the second chamfer edge (226) is arranged at the joint of the second cutting edge (222) and the third cutting edge (223), and the third chamfer edge (227) is arranged at the joint of the fourth cutting edge (224) and the tail part (21).

4. The tool for machining a composite stepped hole according to claim 1, wherein: four chip grooves (23) are arranged, and the four chip grooves (23) are symmetrically distributed along the axis of the tool bit (2).

5. The tool for machining a composite stepped hole according to claim 1, wherein: the blade (3) is a plate-shaped body and comprises an exposed surface and a binding surface (31) which are oppositely arranged, an arc-shaped surface (32) and a step surface (33); the arc-shaped surface (32) is directly connected with one end of the step surface (33), and the other end of the arc-shaped surface is connected with the other end of the step surface through an end surface (34).

6. The tool for machining a composite stepped hole according to claim 5, wherein: arc face (32) with chip groove (23) inside laminating, the shape of step face (33) with the surface shape of tool bit (2) is unanimous and protrusion in tool bit (2) surface sets up.

7. The tool for machining a composite stepped hole according to claim 1, wherein: the blade (3) is arranged in the chip groove (23) in a surfacing mode.