CN217551186U

CN217551186U - Crankshaft hole fine boring cutter

Info

Publication number: CN217551186U
Application number: CN202221713478.5U
Authority: CN
Inventors: 肖勇
Original assignee: Chongqing Chuannan Electromechanical Co ltd
Current assignee: Chongqing Chuannan Electromechanical Co ltd
Priority date: 2022-07-05
Filing date: 2022-07-05
Publication date: 2022-10-11
Anticipated expiration: 2032-07-05

Abstract

The application relates to a bent axle hole finish boring sword includes: the cutter body comprises a first cutter body, a second cutter body and a third cutter body, the first cutter body is used for machining a shaft hole, the second cutter body comprises a first blade and a second blade, the first blade is used for machining a ring groove, the second blade is provided with two obliquely arranged knife faces, the two knife faces of the second blade are different in inclination angle and used for respectively machining a first chamfer and a second chamfer, and the third cutter body is used for machining a protruding part; the first cutter body is arranged at one end of the cutter shaft, and the second cutter body and the third cutter body are both arranged at the side part of the cutter shaft; and one end of the cutter shaft, which is far away from the first cutter body, is arranged on the clamping disc. This application improves among the prior art processing bent axle hole part and needs the tool changing many times, reduces production efficiency's problem.

Description

Finish boring cutter for crankshaft hole

Technical Field

The application relates to the technical field of shaft hole processing, in particular to a crankshaft hole fine boring cutter.

Background

The boring cutter is a boring cutter, is mainly applied to operations such as inner hole machining, hole expanding, profiling and the like of a machined part, and is also divided into a rough boring cutter and a fine boring cutter according to the machining process, wherein the rough boring cutter is used for preprocessing the part to remove metal allowance and improve later-stage boring efficiency; the fine boring tool is used for ensuring the machining precision, the roughness of the surface of a component and the like.

As shown in fig. 1, the crankshaft hole member includes a shaft hole 11, a ring groove 12, a protruding portion 13, a first chamfer 14, and a second chamfer 15, the ring groove 12 surrounds an opening opened in the shaft hole 11, the first chamfer 14 and the second chamfer 15 are respectively opened on both sides of an opening edge of the ring groove 12, the first chamfer 14 and the second chamfer 15 are inclined at different degrees, and an upper end plane height of the protruding portion 13 is lower than an upper end plane height of a peripheral side of the crankshaft hole member.

The finish boring cutter in the prior art needs four steps for processing the crankshaft hole part, wherein the first step is the processing of the shaft hole 11; the second step is the processing of the ring groove 12; the third step is the height processing of the convex part 13; the fourth step is the processing of the first chamfer 14 and the second chamfer 15; therefore, the tool needs to be changed continuously in the machining process, and the efficiency of machining and producing the crankshaft hole part is reduced.

Disclosure of Invention

Based on this, provide a bent axle hole finish boring sword, improve among the prior art processing bent axle hole part and need the tool changing many times, reduce production efficiency's problem.

A crankshaft hole fine boring cutter, comprising:

the cutter body comprises a first cutter body, a second cutter body and a third cutter body, the first cutter body is used for machining a shaft hole, the second cutter body comprises a first blade and a second blade, the first blade is used for machining a ring groove, the second blade is provided with two obliquely arranged cutter faces, the two cutter faces of the second blade are different in inclination angle and used for respectively machining a first chamfer and a second chamfer, and the third cutter body is used for machining a protruding part;

the first cutter body is arranged at one end of the cutter shaft, and the second cutter body and the third cutter body are both arranged at the side part of the cutter shaft;

and one end of the cutter shaft, which is far away from the first cutter body, is arranged on the clamping disc.

In one embodiment, the first cutter body is fixed at the end part of the cutter shaft through a screw, and the cutter head of the first cutter body is obliquely arranged and exceeds the end part of the cutter shaft.

In one embodiment, the second tool body further comprises a second tool holder fixed to a side wall of the arbor, and the first insert and the second insert are both fixed to an end of the second tool holder facing the first tool body.

In one embodiment, the inclination angle of one side tool face of the second insert close to the central axis of the cutter shaft is larger than that of the other side tool face.

In one embodiment, the second blade is a diamond tip.

In one embodiment, the third cutter body includes a third insert and a third cutter holder, the third cutter holder is fixed to a side wall of the cutter shaft, the third cutter holder is provided with a groove, and the third insert is fixed to the groove.

To sum up, the bent axle hole finish boring sword of this application possesses following effect: the first cutter body can carry out direct processing to the bent axle hole, and the size of the first blade precision finishing annular on the second cutter body, blade two can carry out the finish machining to first chamfer and second chamfer respectively, and the height of the workable bellying of third cutter body is integrated a plurality of cutter bodies on same arbor for the course of working need not frequently the tool changing, improves the machining efficiency of bent axle hole part.

Drawings

FIG. 1 is a schematic view of a crankshaft bore feature of the present application;

FIG. 2 is a schematic structural diagram of a crankshaft hole fine boring cutter in an embodiment of the present application;

FIG. 3 is a top view of a crankshaft hole fine boring tool in an embodiment of the present application;

fig. 4 is a schematic structural view of a second cutter body in the embodiment of the present application;

fig. 5 is a schematic structural view of the third cutter body in the embodiment of the present application.

Reference numerals: 11. a shaft hole; 12. a ring groove; 13. a protrusion portion; 14. a first chamfer; 15. a second chamfer; 2. a cutter body; 21. a first cutter body; 22. a second cutter body; 221. a first blade; 222. a second blade; 223. a second tool holder; 23. a third blade body; 231. a third blade; 232. a third tool holder; 3. a cutter shaft; 31. a knife handle; 4. and (7) installing a chuck.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.

It should be noted that the illustrations provided in the present embodiments are only schematic illustrations of the basic idea of the present invention.

The drawings in the present specification illustrate only the structures, proportions, and dimensions of the invention, and are therefore not to be considered limiting, for the understanding and appreciation of those skilled in the art, but are not intended to limit the scope of the invention.

References in this specification to "upper", "lower", "left", "right", "middle", "longitudinal", "lateral", "horizontal", "inner", "outer", "radial", "circumferential", etc., indicate orientations and positional relationships based on those shown in the drawings, and are for convenience only to simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to fig. 2 and 3, the crankshaft hole finish boring cutter comprises a cutter body 2, a cutter shaft 3 and a clamping disc 4, wherein the cutter shaft 3 is installed on the clamping disc 4, and the clamping disc 4 is connected with a numerical control machine tool, so that the crankshaft hole finish boring cutter can be installed on the numerical control machine tool through the clamping disc 4.

Specifically, referring to fig. 1, 2 and 3, the cutter shaft 3 is of a cylindrical structure, one end of the cutter shaft is fixedly connected to the clamping plate 4, a cutter handle 31 is fixed to a side wall of one end, close to the clamping plate 4, of the cutter shaft 3, the cutter shaft 3 penetrates through and is fixed to the cutter handle 31, the cutter handle 31 is fixedly connected to the clamping plate 4, and the diameter of the cutter handle 31 is larger than that of the cutter shaft 3. The clamping plate 4 is of a disc-shaped structure and is provided with a plurality of bolt holes, and when the clamping plate is used, the clamping plate can be fixed on a numerical control machine tool through bolts.

It should be noted that the cutter shaft 3 is made of alloy bar YG6X, the cutter handle 31 is made of 40Cr alloy steel, and the front end of the cutter shaft 3 is made of 40Cr alloy steel, so as to ensure the stability during machining and improve the service life of the fine boring cutter.

Referring to fig. 2, 3, 4 and 5, the cutter body 2 includes a first cutter body 21, a second cutter body 22 and a third cutter body 23, the first cutter body 21 is used for machining the shaft hole 11, the second cutter body 22 includes a first blade 221 and a second blade 222, the first blade 221 is used for machining the ring groove 12, the second blade 222 is provided with two obliquely arranged blade surfaces, the two blade surfaces of the second blade 222 are inclined at different angles so as to be used for respectively machining the first chamfer 14 and the second chamfer 15, and the third cutter body 23 is used for machining the protrusion 13.

Specifically, an inclined hole is formed in one end of the cutter shaft 3, which is far away from the clamping disc 4, the first cutter body 21 is arranged in the inclined hole, the first cutter body 21 is fixedly connected to the end portion of the cutter shaft 3 through a locking screw, and a cutter head of the first cutter body 21 is obliquely arranged and exceeds the end portion of the cutter shaft 3. More specifically, the cutting head of the first cutter body 21 exceeds the end of the cutter shaft 3 by 0.5-0.6mm.

The second cutter body 22 further comprises a second cutter holder 223, the second cutter holder 223 is provided with a fixing hole, a locking screw is arranged in the fixing hole, and the second cutter holder 223 is fixedly mounted on the cutter handle 31 through the locking screw. The first insert 221 and the second insert 222 are both fixedly connected to one end of the second tool holder 223 facing the first tool body 21, the second insert 222 is a diamond tool bit, so that the surfaces of the first chamfer 14 and the second chamfer 15 after the boring operation are smooth, the roughness meets the requirement, the inclination angle of the tool face on one side of the second insert 222 close to the central axis of the arbor 3 is larger than that of the tool face on the other side, more specifically, the inclination angle of the tool face on one side of the second insert 222 close to the central axis of the arbor 3 is 60 °, and the inclination angle of the tool face on one side of the second insert 222 away from the central axis of the arbor 3 is 45 °.

Further, the second tool holder 223 is further provided with an adjusting screw, the adjusting screw of the second tool holder 223 is screwed to the second tool holder 223, and the angle and position of the second tool holder 223 can be finely adjusted by using the adjusting screw, so that the machining accuracy of the first insert 221 and the second insert 222 is higher. The manufacturing specification of the second holder 223 requires heat treatment HRC38-42, surface roughness 0.8R and blackening treatment.

The third cutter body 23 includes a third blade 231 and a third cutter holder 232, the third cutter holder 232 is fixed on the side wall of the cutter shaft 3, the third cutter holder 232 is also provided with a fixing hole and a locking screw, the third cutter holder 232 is fixedly mounted on the cutter handle 31 through the locking screw, a groove body is formed in one end of the third cutter holder 232 facing the first cutter body 21, the third blade 231 is fixedly mounted on the groove body, and the cutter face of the third blade 231 exceeds the end of the third cutter holder 232 for boring the protruding part 13, so that the height of the protruding part 13 meets the requirement.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent application shall be subject to the appended claims.

Claims

1. The utility model provides a bent axle hole finish boring sword which characterized in that includes:

the cutter body (2) comprises a first cutter body (21), a second cutter body (22) and a third cutter body (23), the first cutter body (21) is used for machining a shaft hole (11), the second cutter body (22) comprises a first blade (221) and a second blade (222), the first blade (221) is used for machining a ring groove (12), the second blade (222) is provided with two obliquely arranged blade surfaces, the two blade surfaces of the second blade (222) have different inclination angles so as to be used for respectively machining a first chamfer (14) and a second chamfer (15), and the third cutter body (23) is used for machining a protrusion (13);

the cutter shaft (3), the first cutter body (21) is installed at one end of the cutter shaft (3), and the second cutter body (22) and the third cutter body (23) are installed at the side part of the cutter shaft (3);

the cutter shaft (3) is far away from one end of the first cutter body (21) and is arranged on the clamping disc (4).

2. The crankshaft bore finishing tool of claim 1, wherein: the first cutter body (21) is fixed at the end part of the cutter shaft (3) through screws, and a cutter head of the first cutter body (21) is obliquely arranged and exceeds the end part of the cutter shaft (3).

3. The crankshaft bore finishing tool of claim 1, wherein: the second cutter body (22) further comprises a second cutter holder (223), the second cutter holder (223) is fixed on the side wall of the cutter shaft (3), and the first blade (221) and the second blade (222) are both fixed on one end, facing the first cutter body (21), of the second cutter holder (223).

4. The crankshaft bore finishing tool of claim 3, wherein: the inclined angle of the knife face of one side of the second blade (222), which is close to the central axis of the knife shaft (3), is larger than that of the other side.

5. The crankshaft bore finishing tool of claim 3, wherein: the second blade (222) is a diamond tool bit.

6. The crankshaft bore finishing tool of claim 1, wherein: the third cutter body (23) comprises a third blade (231) and a third cutter holder (232), the third cutter holder (232) is fixed on the side wall of the cutter shaft (3), a groove body is formed in the third cutter holder (232), and the third blade (231) is fixedly installed on the groove body.