CN212822741U

CN212822741U - Centering compound cutter

Info

Publication number: CN212822741U
Application number: CN202021009221.2U
Authority: CN
Inventors: 范恩平; 李建清; 廖柳青; 帅虎
Original assignee: Guangzhou Diesel Engine Factory Co ltd
Current assignee: Guangzhou Diesel Engine Factory Co ltd
Priority date: 2020-06-04
Filing date: 2020-06-04
Publication date: 2021-03-30
Anticipated expiration: 2030-06-04

Abstract

The utility model discloses a centering compound cutter, which comprises a cutter body, wherein the head part of the cutter body is provided with two groups of separating parts, the end parts of the two groups of separating parts are connected, the joint part of the two groups of separating parts is in a cone shape, the cutter body is divided into two cutting spaces by the two groups of separating parts, each cutting space is provided with a cutting part, the cutting part is provided with a cutting edge, the top surface and the outer side surface of the cutting edge are both protruded out of the cutting part, and the vertex of the joint part of the two groups of separating parts; the cutter body is detachably arranged on the cutter bar. The utility model discloses a joint that the head at the cutter body set up the taper is with the centering to set up the big aperture hole in the cutting part in order to process the group hole at the head of cutter body, can guarantee that the cutter body feeds stably at the milling process, also satisfied the straightness requirement that hangs down of the plane degree requirement in big aperture hole and aperture hole, improved machining efficiency.

Description

Centering compound cutter

Technical Field

The utility model relates to a centering compound tool in the machining technical field.

Background

When machining a group of holes phi 28/M18 x 1.5 on a cylinder head of a diesel engine, the general process steps are as follows: firstly, drilling a central hole in the center; secondly, manually changing a tool and drilling a thread bottom hole; thirdly, manually changing the tool, and leveling the counter bore by aligning the key slot tool with the center; and fourthly, manually changing the tool and tapping by a screw tap. Because the machined surface has a blank surface and an inclined surface, the feeding is slow when a common keyway cutter is used for machining, the machined bottom plane of the counter bore is uneven and exceeds the perpendicularity 0.04 of the M18 x 1.5 tooth hole required by a drawing, the center of the hole also needs to be aligned again after the cutter is changed, the cutter changing process needs manual operation, the operation is complex, and the machining efficiency is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a centering compound tool, it can improve machining efficiency.

According to the embodiment of the first aspect of the utility model, a centering compound cutter is provided, which comprises a cutter body, the head of the cutter body is provided with two groups of separating parts, the end parts of the two groups of separating parts are connected and the joint is tapered, the two groups of separating parts divide the cutter body into two cutting spaces, each cutting space is provided with a cutting part, the cutting part is provided with a cutting edge, the top surface and the outer side surface of the cutting edge both protrude out of the cutting part, and the vertex of the joint of the two groups of separating parts protrudes out of the top surfaces of the two cutting edges; the cutter body is detachably arranged on the cutter bar.

According to the utility model discloses in the embodiment of the first aspect, further, each cutting portion is about the central axis symmetry of cutter body, each cutting edge is about the central axis symmetry of cutter body.

According to the utility model discloses first aspect embodiment, furtherly, the top surface of cutting edge sets up surely to one side, the plane that the top surface of cutting edge was located with form the contained angle between the cross section of cutter body.

According to the utility model discloses in the embodiment of the first aspect, further, the contained angle between the plane that the top surface of cutting edge is located and the cross section of cutter body is 14 ~ 20.

According to the utility model discloses first aspect embodiment, furtherly, the lateral surface slope setting of cutting edge, the lateral surface of cutting edge with form the contained angle between the tangential direction of cutter body.

According to the utility model discloses first aspect embodiment, furtherly, the lateral surface of cutting edge with contained angle between the tangential direction of cutter body is greater than 0 and is less than 10.

According to an embodiment of the first aspect of the present invention, further, the junction cone angle is 120 °.

According to the utility model discloses first aspect embodiment, furtherly, the afterbody of cutter body is equipped with the linkage segment, be equipped with the external screw thread on the linkage segment, be equipped with the mounting hole on the cutter arbor, be equipped with the internal thread in the mounting hole, the cutter body with cutter arbor threaded connection.

According to the utility model discloses an embodiment of the first aspect, furtherly, the linkage segment is the echelonment, the external screw thread is located on the path section of linkage segment, the mounting hole is the shoulder hole, the internal thread is located the path section of mounting hole.

The utility model has the advantages that: the utility model discloses a joint that the head at the cutter body set up the taper is with the centering to set up the big aperture hole in the cutting part in order to process the group hole at the head of cutter body, can guarantee that the cutter body feeds stably at the milling process, also satisfied the straightness requirement that hangs down of the plane degree requirement in big aperture hole and aperture hole, improved machining efficiency.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

Fig. 1 is a front view of a cutter body according to the present invention;

fig. 2 is a side view of a cutter body according to the present invention;

fig. 3 is a top view of the cutter body of the present invention;

fig. 4 is a front view of the middle tool bar of the present invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1-2 and 4, the centering combined tool in the embodiment of the present invention includes a tool body 10 and a tool bar 40, wherein the tool body 10 is detachably mounted on the tool bar 40. In the embodiment, the tail portion of the cutter body 10 is provided with a connecting section 50, and the connecting section 50 is provided with an external thread, preferably, the connecting section 50 is in a step shape, and the external thread is located on the small diameter section of the connecting section 50. Correspondingly, the tool bar 40 is provided with a mounting hole 60, and an internal thread is provided in the mounting hole 60, preferably, the mounting hole 60 is a stepped hole, and the internal thread is located at a small diameter section of the mounting hole 60. The cutter body 10 is in threaded connection with the cutter rod 40 so as to be convenient to disassemble and replace; in addition, the shoulder of the connecting section 50 can abut against the shoulder of the mounting hole 60 to play a role in limiting, so that the cutter body 10 and the cutter bar 40 can be reasonably assembled, and the jumping requirement of the cutter body 10 and the cutter bar 40 can be met.

Referring to fig. 1 to 3, the cutter body 10 is provided at the head thereof with two sets of partitions 20, the ends of the two sets of partitions 20 are connected and the joint 21 is tapered, the two sets of partitions 20 divide the cutter body 10 into two cutting spaces, each cutting space is provided with a cutting portion 30, the cutting portion 30 is provided with a cutting edge 31, the top and outer side surfaces of the cutting edge 31 protrude from the cutting portion 30, and the apex of the joint 21 of the two sets of partitions 20 protrudes from the top surfaces of the two cutting edges 31, thereby achieving the centering effect. In the embodiment, each cutting portion 30 is symmetrical about the central axis of the cutter body 10, and each cutting edge 31 is symmetrical about the central axis of the cutter body 10, so as to ensure that the shape of the machined hole is symmetrical and uniform. Preferably, the 21 cone angle of junction is 120 to the centering point also is favorable to the processing of follow-up small bore hole, satisfies the straightness requirement that hangs down of small bore hole.

In the embodiment, in order to improve the cutting quality of the cutting edge 31 to the large-aperture hole, the top surface of the cutting edge 31 is obliquely arranged. Referring to fig. 2, an angle a is formed between a plane on which the top surface of the cutting edge 31 is located and the cross-section of the cutter body 10, and an angle a between a plane on which the top surface of the cutting edge 31 is located and the cross-section of the cutter body 10 is 14 ° to 20 °, preferably, the angle a may be 14 °. Further, the outer side surface of the cutting edge 31 is inclined, and referring to fig. 3, an angle b is formed between the outer side surface of the cutting edge 31 and the tangential direction of the cutter body 10, and an angle b between the outer side surface of the cutting edge 31 and the tangential direction of the cutter body 10 is greater than 0 ° and less than 10 °, and preferably, the angle b is 8 °. The inclination of the top surface and the outer side surface of the cutting edge 31 can better process the blank surface in the hole and meet the requirement of the planeness of the large-aperture hole.

Taking machining of phi 28/M18 x 1.5 groups of holes as an example, the diameter of the large-aperture hole is phi 28, the small-aperture hole is a screw hole with the large diameter of M18, and the large-aperture hole is close to the machining surface. Use the utility model discloses a qualitative combined cutting tool has following process: firstly, feeding a cutter on a processing surface, cutting a large-aperture hole, and simultaneously, centering and drilling a small-aperture hole to form a central hole; secondly, manually changing a tool and drilling a thread bottom hole; and thirdly, manually changing a tool and tapping by a screw tap. The cutter body is centered through the conical connection part, stable feeding in the milling process can be ensured, and the flatness of the bottom surface of the large-aperture hole and the verticality requirement of the small-aperture hole are well ensured.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.

Claims

1. A centering compound tool, comprising:

the cutter body (10), the head of the cutter body (10) is provided with two groups of separating parts (20), the end parts of the two groups of separating parts (20) are connected, a joint (21) is in a cone shape, the cutter body (10) is divided into two cutting spaces by the two groups of separating parts (20), each cutting space is provided with a cutting part (30), the cutting parts (30) are provided with cutting edges (31), the top surfaces and the outer side surfaces of the cutting edges (31) both protrude out of the cutting parts (30), and the top points of the joint (21) of the two groups of separating parts (20) protrude out of the top surfaces of the two cutting edges (31);

the cutter body (10) is detachably arranged on the cutter bar (40).

2. The centering compound tool of claim 1, wherein: each cutting portion (30) is symmetrical about the central axis of the cutter body (10), and each cutting edge (31) is symmetrical about the central axis of the cutter body (10).

3. The centering compound tool according to claim 1 or 2, characterized in that: the top surface of the cutting edge (31) is arranged in an oblique cutting mode, and an included angle is formed between the plane where the top surface of the cutting edge (31) is located and the cross section of the cutter body (10).

4. The centering compound tool of claim 3, wherein: the included angle between the plane of the top surface of the cutting edge (31) and the cross section of the cutter body (10) is 14-20 degrees.

5. The centering compound tool according to claim 1 or 2, characterized in that: the outer side surface of the cutting edge (31) is obliquely arranged, and an included angle is formed between the outer side surface of the cutting edge (31) and the tangential direction of the cutter body (10).

6. The centering compound tool of claim 5, wherein: the included angle between the outer side surface of the cutting edge (31) and the tangential direction of the cutter body (10) is larger than 0 degree and smaller than 10 degrees.

7. The centering compound tool according to claim 1 or 2, characterized in that: the connection (21) has a cone angle of 120 °.

8. The centering compound tool of claim 1, wherein: the cutter body (10) is characterized in that a connecting section (50) is arranged at the tail of the cutter body (10), an external thread is arranged on the connecting section (50), a mounting hole (60) is formed in the cutter rod (40), an internal thread is arranged in the mounting hole (60), and the cutter body (10) is in threaded connection with the cutter rod (40).

9. The centering compound tool of claim 8, wherein: the connecting section (50) is in a step shape, the external threads are located on the small-diameter section of the connecting section (50), the mounting hole (60) is a stepped hole, and the internal threads are located on the small-diameter section of the mounting hole (60).