Adjustable combined milling cutter with large cutting depth for machining automobile crankshaft

Abstract

The utility model belongs to the technical field of machining, particularly relates to an adjustable combined milling cutter with large cutting depth for machining an automobile crankshaft, and provides the following scheme aiming at the problems that the length of a cutter bar of an existing milling cutter is fixed, so that drill handles with various lengths need to be arranged frequently, replacement and disassembly are troublesome, and the milling efficiency is influenced. Comprising a combined milling cutter head, a self-centering replacement mounting assembly located at the bottom of the combined milling cutter head and a cutting depth adjusting assembly located at the top of the combined milling cutter head. Through the cutting depth adjusting assembly and the guide groove, the extending cutter handle is subjected to extending or retracting adjustment, and the problems that the length of a cutter bar of an existing milling cutter is fixed, different milling depths are needed for different machining positions of a crankshaft, drilling handles of various lengths need to be arranged frequently, and the machining efficiency is high are solved. And replacement and disassembly are troublesome, the milling efficiency is affected, and the requirements of various milling depths cannot be met.

Description

Technical Field

[0001] The utility model relates to a combined milling cutter, in particular to a combined milling cutter with an adjustable large cutting depth for machining automobile crankshafts, belonging to the technical field of mechanical machining. Background Art

[0002] The crankshaft is the most important component in a car engine. It bears the force from the connecting rod and converts it into torque, which is output through the crankshaft and drives other accessories on the engine. When processing the crankshaft of a car, a combination milling cutter is needed. The combination milling cutter is a cutting tool widely used in mechanical processing. It is usually composed of two or more separate milling cutter heads and can be used to process various features on the crankshaft, such as journals, oil holes, balance blocks, etc.

[0003] In the prior art, a high-speed internal milling cutter for crankshaft processing disclosed in announcement number CN216882123U includes a shank, a cutter head and a blade. The shank has a clamping groove fixedly arranged on one side, which is convenient for installation on a machine tool; the cutter head is arranged on the lower side of the shank, and a connecting seat is fixedly installed on the upper side. When milling, the cutter head rotates at high speed so that the coolant enters each cooling tube, thereby realizing rapid cooling of the cutter head and playing a certain protective role. In addition, a heat insulation board is fixedly arranged at the connection between the shank and the cutter head, which can effectively block the heat generated by the cutter head from being transferred to the shank, thereby improving the protection of the shank. The surfaces of the shank, the cutter head and the blade are all provided with an anti-rust coating, which can prevent the internal milling cutter from rusting and affecting its service life.

[0004] However, in actual use, the length of the milling cutter rod of the above-mentioned patent is fixed. Since different processing positions of the crankshaft require different milling depths, drill shanks of various lengths are often required. Replacement and disassembly are troublesome, which affects the milling efficiency and cannot meet the needs of various milling depths. Utility Model Content

[0005] The utility model aims to solve the problem that the length of the above-mentioned milling cutter shank is fixed, and different milling depths are required for different processing positions of the crankshaft, so drill shanks of various lengths are often needed, which is troublesome to replace and disassemble, affecting the milling efficiency and failing to meet the needs of various milling depths. A combined milling cutter with an adjustable large cutting depth for automobile crankshaft processing is provided to solve the problem that the length of the above-mentioned milling cutter shank is fixed, and different milling depths are required for different processing positions of the crankshaft, so drill shanks of various lengths are often needed, which is troublesome to replace and disassemble, affecting the milling efficiency and failing to meet the needs of various milling depths.

[0006] The utility model achieves the above-mentioned purpose through the following technical solutions: a combined milling cutter with adjustable large cutting depth for machining automobile crankshafts, comprising a combined milling cutter head, a self-centering replacement and installation assembly located at the bottom of the combined milling cutter head, and a cutting depth adjustment assembly located at the top of the combined milling cutter head;

[0007] The cutting depth adjustment assembly includes an adjustment block, one end of which is fixedly connected to a second bevel gear, a first bevel gear is meshed below the second bevel gear, a screw is fixedly connected to the bottom of the first bevel gear, and an extended tool handle is threadedly connected to the surface of the screw.

[0008] As a further solution of the utility model: two groups of guide grooves are provided on the surface of the extended knife handle.

[0009] As a further solution of the utility model: the extended tool handle and the combined milling cutter head are fixedly connected, and a file shaft is provided at the connection between the combined milling cutter head and the extended tool handle.

[0010] As a further solution of the utility model: the self-centering replacement installation assembly includes a self-centering head, one end of the self-centering head is welded with a threaded installation block, and the top of the threaded installation block is fixedly installed with a first magnetic attraction ring.

[0011] As a further solution of the utility model: a self-centering installation groove is provided at the bottom of the combined milling cutter head, and a second magnetic attraction ring is fixedly installed inside the self-centering installation groove.

[0012] As a further solution of the utility model: a plurality of groups of chip removal grooves are provided on the surface of the combined milling cutter head, and chip breaking blades are fixedly installed on the surface of the chip removal grooves.

[0013] As a further solution of the utility model: a combined milling cutter handle is sleeved on the outside of the extended handle, and the adjustment block is rotatably installed on one side of the combined milling cutter handle.

[0014] The beneficial effects of the utility model are:

[0015] 1. The self-centering replacement installation assembly is provided to improve the problem that the existing self-centering head is difficult to disassemble and difficult to repair after being worn. Once the wear is serious, the combined milling cutter head needs to be replaced, which increases the processing cost. The first magnetic attraction ring and the second magnetic attraction ring are provided to help enhance the connection strength between the self-centering head and the combined milling cutter head and improve the problem of looseness at the threaded connection.

[0016] 2. Through the chip groove and chip breaker, the chip breaker can effectively split the long chips in the chip groove into multiple shorter chips, so that the chips will not accumulate, which is conducive to the heat dissipation of the combined milling cutter head, reduces the cutting resistance and prolongs the tool life; through the set shaft file, the burrs at the cutting tail of the automobile crankshaft can be removed to prevent the residual burrs at the tail of the automobile crankshaft, and effectively improve the processing quality of the automobile crankshaft;

[0017] 3. Through the setting of the cutting depth adjustment component and the setting of the guide groove, the extended tool handle can be extended or retracted for adjustment. This setting improves the problem that the length of the existing milling cutter rod is fixed. Since different processing positions of the crankshaft require different milling depths, it is often necessary to equip drill handles of various lengths. Replacement and disassembly are troublesome, which affects the milling efficiency and cannot meet the needs of various milling depths. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 For this utility model Figure 1 A schematic diagram of the structure with a partial enlargement at the center;

[0020] Figure 3 This is a structural schematic diagram of the self-centering replacement installation assembly of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the cutting depth adjustment component of the utility model.

[0022] In the figure: 1. Combined milling cutter handle; 2. File shaft; 3. Combined milling cutter head; 4. Self-centering replacement installation assembly; 401. Self-centering head; 402. Threaded mounting block; 403. First magnetic ring; 404. Self-centering mounting groove; 405. Second magnetic ring; 5. Cutting depth adjustment assembly; 501. Extended shank; 502. Adjustment block; 503. Guide groove; 504. Screw; 505. First bevel gear; 506. Second bevel gear; 6. Chip breaker; 7. Chip removal groove. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Embodiment 1

[0024] like Figures 1 to 4 As shown, a combined milling cutter with an adjustable large cutting depth for machining an automobile crankshaft comprises a combined milling cutter head 3, a self-centering replacement and installation assembly 4 located at the bottom of the combined milling cutter head 3, and a cutting depth adjustment assembly 5 located at the top of the combined milling cutter head 3;

[0025] The cutting depth adjustment assembly 5 includes an adjustment block 502, one end of which is fixedly connected to a second bevel gear 506, a first bevel gear 505 is meshed below the second bevel gear 506, a screw rod 504 is fixedly connected to the bottom of the first bevel gear 505, and an extended tool handle 501 is threadedly connected to the surface of the screw rod 504; when the cutting depth needs to be adjusted, the rotatable adjustment block 502 drives the second bevel gear 506 to rotate, thereby driving the first bevel gear 505 and the screw rod 504 to rotate, and the guide groove 503 is provided to make the extended tool handle 501 extend or retract for adjustment. Embodiment 2

[0026] In addition to all the technical features of the first embodiment, this embodiment also includes:

[0027] Two sets of guide grooves 503 are formed on the surface of the extended handle 501 , and the guide grooves 503 can play a guiding role.

[0028] The extended tool handle 501 and the combined milling cutter head 3 are fixedly connected, and a filing shaft 2 is provided at the connection between the combined milling cutter head 3 and the extended tool handle 501; the filing shaft 2 can be used to remove burrs at the cutting tail of the automobile crankshaft to prevent residual burrs at the tail of the automobile crankshaft, thereby effectively improving the processing quality of the automobile crankshaft.

[0029] The self-centering replacement installation component 4 includes a self-centering head 401, one end of which is welded with a threaded mounting block 402, and the top of the threaded mounting block 402 is fixedly installed with a first magnetic ring 403; when the self-centering head 401 is worn, the self-centering head 401 can be rotated counterclockwise to drive the threaded mounting block 402 out of the self-centering mounting groove 404, and the self-centering head 401 can be replaced. Embodiment 3

[0030] In addition to all the technical features of the first embodiment, this embodiment also includes:

[0031] A self-centering mounting groove 404 is provided at the bottom of the combination milling cutter head 3, and a second magnetic ring 405 is fixedly installed inside the self-centering mounting groove 404. The first magnetic ring 403 and the second magnetic ring 405 are arranged in coordination, which helps to enhance the connection strength between the self-centering head 401 and the combination milling cutter head 3 and improve the problem of looseness at the threaded connection.

[0032] The surface of the combined milling cutter head 3 is provided with a plurality of groups of chip grooves 7, and the surface of the chip groove 7 is fixedly provided with a chip breaking blade 6, which can effectively split the longer chips in the chip groove 7 into a plurality of shorter chips, so that the chips will not accumulate, which is beneficial to the heat dissipation of the combined milling cutter head 3, reduces the cutting resistance and prolongs the tool life.

[0033] The outer part of the extended tool handle 501 is sleeved with the combined milling cutter handle 1, and the adjustment block 502 is rotatably installed on one side of the combined milling cutter handle 1. The combined milling cutter handle 1 cooperates with the extended tool handle 501 to improve the existing milling cutter rod with a fixed length. Since different processing positions of the crankshaft require different milling depths, drill handles of various lengths are often required. Replacement and disassembly are troublesome, which affects the milling efficiency and cannot meet the needs of various milling depths.

[0034] Working principle: When using the combination milling cutter with adjustable large cutting depth for processing automobile crankshafts, the self-centering replacement installation component 4 is set. When the self-centering head 401 is worn, the self-centering head 401 can be rotated counterclockwise to drive the threaded mounting block 402 to disengage from the self-centering mounting groove 404, and the self-centering head 401 can be replaced. This arrangement improves the problem that the existing self-centering head 401 is not easy to disassemble, and the self-centering head 401 is not easy to repair after wear. Once the wear is serious, the combination milling cutter head 3 needs to be replaced, which increases the processing cost. The first magnetic ring 403 and the second magnetic ring 405 are set together, which helps to enhance the connection strength between the self-centering head 401 and the combination milling cutter head 3 and improve the problem of looseness at the threaded connection; the chip groove 7 and the chip breaker 6 are set, wherein the chip breaker 6 can effectively split the longer chips in the chip groove 7 into multiple shorter chips. The chips are not accumulated, which is beneficial to the heat dissipation of the combined milling cutter head 3, reduces the cutting resistance, and prolongs the tool life; the burrs at the cutting tail of the automobile crankshaft can be removed by the set file shaft 2, so as to prevent the residual burrs at the tail of the automobile crankshaft and effectively improve the processing quality of the automobile crankshaft; through the set cutting depth adjustment component 5, when the cutting depth needs to be adjusted, the adjusting block 502 can be rotated to drive the second bevel gear 506 to rotate, and then drive the first bevel gear 505 and the screw rod 504 to rotate, and cooperate with the set guide groove 503 to make the extended tool handle 501 extend or retract for adjustment. This setting improves the existing milling cutter arbor with a fixed length. Since different processing positions of the crankshaft require different milling depths, it is often necessary to equip drill handles of various lengths, which are troublesome to replace and disassemble, affecting the milling efficiency and failing to meet the needs of various milling depths.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A combined milling cutter with an adjustable large cutting depth for machining an automobile crankshaft, characterized in that: It comprises a combined milling cutter head (3), a self-centering replacement installation component (4) located at the bottom of the combined milling cutter head (3), and a cutting depth adjustment component (5) located at the top of the combined milling cutter head (3); The cutting depth adjustment assembly (5) comprises an adjustment block (502), one end of the adjustment block (502) being fixedly connected to a second bevel gear (506), a first bevel gear (505) being meshed below the second bevel gear (506), a screw rod (504) being fixedly connected to the bottom of the first bevel gear (505), and an extended tool handle (501) being threadedly connected to the surface of the screw rod (504).

2. The combination milling cutter with adjustable large cutting depth for machining automobile crankshafts according to claim 1, characterized in that: Two groups of guide grooves (503) are formed on the surface of the extended knife handle (501).

3. The combination milling cutter with adjustable large cutting depth for machining automobile crankshafts according to claim 1, characterized in that: The extended tool handle (501) and the combined milling cutter head (3) are fixedly connected, and a file shaft (2) is provided at the connection between the combined milling cutter head (3) and the extended tool handle (501).

4. The combination milling cutter with adjustable large cutting depth for machining automobile crankshafts according to claim 1, characterized in that: The self-centering replacement installation assembly (4) comprises a self-centering head (401), one end of the self-centering head (401) is welded with a threaded installation block (402), and the top of the threaded installation block (402) is fixedly mounted with a first magnetic attraction ring (403).

5. The combination milling cutter with adjustable large cutting depth for machining automobile crankshafts according to claim 1, characterized in that: A self-centering installation groove (404) is provided at the bottom of the combined milling cutter head (3), and a second magnetic attraction ring (405) is fixedly installed inside the self-centering installation groove (404).

6. The combination milling cutter with adjustable large cutting depth for machining automobile crankshafts according to claim 1, characterized in that: The surface of the combined milling cutter head (3) is provided with a plurality of groups of chip removal grooves (7), and the surface of the chip removal grooves (7) is fixedly mounted with chip breaking blades (6).

7. The combination milling cutter with adjustable large cutting depth for machining automobile crankshafts according to claim 1, characterized in that: The combined milling cutter handle (1) is sleeved on the outside of the extended handle (501), and the adjustment block (502) is rotatably mounted on one side of the combined milling cutter handle (1).

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