Replaceable wear-resistant stepped milling cutter for machining automobile crankshaft

Abstract

The utility model belongs to the technical field of stepped milling cutters, particularly relates to a replaceable wear-resistant stepped milling cutter for machining an automobile crankshaft, and solves the problems that a blade part with the outer diameter size is possibly abraded due to long-time use of the milling cutter in the prior art, and the cost of a user is increased when the blade part is replaced due to integral connection between the blade part and a cutter handle. According to the scheme, the tool comprises a first tool bit. According to the milling cutter, the fourth mounting groove, the third mounting groove, the second mounting groove and the first mounting groove are matched with the first cutter block, the second cutter block and the third cutter block which are mounted in the first mounting groove, so that when the cutting edges of the cutter blocks are abraded, a user can only replace the abraded first cutter block, the abraded second cutter block and the abraded third cutter block, and does not need to replace the whole milling cutter; the use cost is greatly reduced, meanwhile, the machining efficiency and the product quality are improved, remarkable economic benefits are brought to enterprises, and the production efficiency, the product quality and the like are improved.

Description

Technical Field

[0001] The utility model relates to a wear-resistant step milling cutter, in particular to a replaceable wear-resistant step milling cutter for machining automobile crankshafts, belonging to the technical field of step milling cutters. Background Art

[0002] The main body of the step milling cutter is made of high-strength and high-wear-resistant alloy steel to ensure that the cutter has sufficient strength and stability during high-speed rotation and cutting. In the process of automobile crankshaft processing, the step milling cutter is a commonly used cutting tool.

[0003] The failure to discharge chips in time during use of existing step milling cutters will increase the friction between the tool and the chips, thereby accelerating the wear of the tool, which will not only reduce the service life of the tool, but may also affect the processing accuracy and surface quality. The chip removal problem may also lead to frequent shutdowns to clean chips, thereby reducing processing efficiency.

[0004] A stepped milling cutter with announcement number CN220259658U includes a shank and a blade. The blade includes a plurality of blade portions which are connected in sequence and whose outer diameters decrease in sequence. The stepped milling cutter of the utility model can solve the problem of inconvenient chip guiding of the stepped milling cutter to a certain extent.

[0005] In the above technical solution, through the tool holder and the blade, the blade includes multiple blade parts connected in sequence and with successively decreasing outer diameters, which can solve the problem of inconvenient chip guiding of the stepped milling cutter to a certain extent. However, long-term use of the milling cutter may cause wear of the blade part with an outer diameter. Since the blade part is integrally connected to the tool holder, the user cost is increased when replacing the blade. For this reason, we provide a replaceable wear-resistant stepped milling cutter for processing automobile crankshafts. Utility Model Content

[0006] The utility model provides a replaceable wear-resistant step milling cutter for machining automobile crankshafts in order to solve the problem that the outer diameter of the blade may be worn out due to long-term use of the milling cutter, and the user cost is increased when replacing the blade due to the integral connection between the blade and the handle.

[0007] The utility model achieves the above-mentioned purpose through the following technical scheme: a replaceable wear-resistant step milling cutter for machining an automobile crankshaft, comprising a first cutter head, a first blade body fixedly connected below the first cutter head, a second blade body fixedly connected below the first blade body, a third blade body fixedly connected below the second blade body, a fourth blade body fixedly connected below the third blade body, and a chip removal groove is further arranged on the outside of the first cutter head, the first blade body, the second blade body, the third blade body, and the fourth blade body;

[0008] The outer periphery of the first blade head and the first blade body is provided with a fourth mounting groove, the outer periphery of the second blade body is provided with a third mounting groove, the outer periphery of the third blade body is provided with a second mounting groove, the outer periphery of the fourth blade body is provided with a first mounting groove, and a handle is fixedly connected to the lower side of the fourth blade body.

[0009] As a further solution of the utility model: first limiting holes are provided on the inner wall surfaces of the first mounting groove, the second mounting groove, the third mounting groove and the fourth mounting groove.

[0010] As a further solution of the utility model: a first limiting block is fixedly installed on the outer wall surface of the first installation groove.

[0011] As a further solution of the utility model: a third blade block is fixedly installed on the outer wall surface of the second installation groove.

[0012] As a further solution of the utility model: the outer wall surface of the third installation groove is fixedly mounted with a second blade block, and the outer wall surface of the fourth installation groove is fixedly mounted with a first blade block.

[0013] As a further solution of the utility model: the right sides of the outer walls of the first knife block, the second knife block, the third knife block and the first limit block are fixedly connected with knife block cutting edges.

[0014] As a further solution of the utility model: the outer wall surfaces of the first knife block, the second knife block, the third knife block and the first limit block are provided with knife block fixing holes, and the internal threads of the knife block fixing holes are provided with fixing screws.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model cooperates with each other through the fourth installation slot, the third installation slot, the second installation slot, the first installation slot and the first blade block, the second blade block and the third blade block installed therein, so that when the cutting edge of the blade block is worn, the user can only replace the worn first blade block, the second blade block and the third blade block without replacing the entire milling cutter, which greatly reduces the use cost and material waste, and improves the processing efficiency and product quality, bringing significant economic benefits to users, including reducing material costs, improving production efficiency, and improving product quality.

[0017] 2. The utility model uses the fourth installation slot, the third installation slot, the second installation slot, the first limiting hole on the inner wall of the first installation slot and the knife block fixing holes on the first knife block, the second knife block and the third knife block in combination with fixing screws, so that the installation and removal of the knife block becomes simple and quick, and the production efficiency is improved. The production efficiency is further improved, and by replacing only the worn knife block, the cumbersome process of frequent replacement due to the wear of the entire milling cutter is avoided, thereby improving the processing efficiency. At the same time, because the replaced knife block can maintain the sharpness of the milling cutter, it is helpful to improve the processing accuracy and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 This is a schematic diagram of the installation slot structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the knife block of the utility model;

[0021] Figure 4 For this utility model Figure 1 Enlarged schematic diagram at point A in the middle.

[0022] In the figure: 1. first blade head; 2. first blade; 3. second blade; 4. third blade; 5. fourth blade; 6. handle; 7. first blade block; 8. second blade block; 9. third blade block; 10. first limiting block; 11. fixing screw; 12. first mounting slot; 13. second mounting slot; 14. third mounting slot; 15. fourth mounting slot; 16. first limiting hole; 17. blade block fixing hole; 18. blade block cutting edge; 19. chip 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 4As shown, a replaceable wear-resistant stepped milling cutter for machining an automobile crankshaft comprises a first cutter head 1, a first blade body 2 is fixedly connected to the lower part of the first cutter head 1, a second blade body 3 is fixedly connected to the lower part of the first blade body 2, a third blade body 4 is fixedly connected to the lower part of the second blade body 3, a fourth blade body 5 is fixedly connected to the lower part of the third blade body 4, a chip withdrawal groove 19 is further provided on the outer parts of the first cutter head 1, the first blade body 2, the second blade body 3, the third blade body 4, and the fourth blade body 5, the chip withdrawal groove 19 facilitates the discharge of cutting chips to the outside, a fourth mounting groove 15 is provided on the outer periphery of the first cutter head 1 and the first blade body 2, a third mounting groove 14 is provided on the outer periphery of the second blade body 3, a second mounting groove 13 is provided on the outer periphery of the third blade body 4, and a first mounting groove is provided on the outer periphery of the fourth blade body 5 12, the handle 6 is fixedly connected to the lower part of the fourth blade body 5, the third blade block 9 is fixedly installed on the outer wall surface of the second installation groove 13, the second blade block 8 is fixedly installed on the outer wall surface of the third installation groove 14, and the first blade block 7 is fixedly installed on the outer wall surface of the fourth installation groove 15. Through the mutual cooperation between the fourth installation groove 15, the third installation groove 14, the second installation groove 13, the first installation groove 12 and the first blade block 7, the second blade block 8, and the third blade block 9 installed inside, when the blade block cutting edge 18 is worn, the user can only replace the worn first blade block 7, the second blade block 8, and the third blade block 9 without replacing the entire milling cutter, which greatly reduces the use cost, improves the processing efficiency and product quality, and brings significant economic benefits to the user. In addition, since the replaced blade block can maintain the sharpness of the milling cutter, it helps to improve the processing accuracy and product quality. Embodiment 2

[0025] In addition to all the technical features of the first embodiment, the present embodiment further includes: a first limiting hole 16 is provided on the inner wall surface of the first mounting groove 12, the second mounting groove 13, the third mounting groove 14, and the fourth mounting groove 15; a first limiting block 10 is fixedly installed on the outer wall surface of the first mounting groove 12; a knife block cutting edge 18 is fixedly connected to the right side of the outer wall of the first knife block 7, the second knife block 8, the third knife block 9, and the first limiting block 10; a knife block fixing hole 17 is provided on the outer wall surface of the first knife block 7, the second knife block 8, the third knife block 9, and the first limiting block 10; The internal thread of the fixing hole 17 is installed with a fixing screw 11. The fourth installation groove 15, the third installation groove 14, the second installation groove 13, the first installation groove 12 inner wall's first limiting hole 16 and the first blade block 7, the second blade block 8, the third blade block 9 are used in conjunction with the fixing screw 11, so that the installation and disassembly of the blade block becomes simple and quick, which improves production efficiency, reduces use cost, reduces material waste, and improves processing efficiency and product quality, achieving multiple benefits such as reducing material cost, improving production efficiency, and improving product quality.

[0026] Working principle:

[0027] First, observe the working condition of the milling cutter to determine which level of the cutter block cutting edge 18 is severely worn and needs to be replaced, unscrew the fixing screw 11, and after unscrewing the screw, the worn cutter block can be removed from the mounting slot, and a new cutter block with the same size and matching performance as the worn cutter block can be selected and placed in the corresponding mounting slot, making the installation and removal of the cutter block simple and quick.

[0028] Secondly, these fixing screws 11 pass through the blade block fixing holes 17 and match with the first limiting holes 16 on the inner walls of the first mounting groove 12, the second mounting groove 13, the third mounting groove 14, and the fourth mounting groove 15 to fix the first blade block 7, the second blade block 8, the third blade block 9, and the first limiting block 10 on the mounting grooves. Ensure that the blade block fixing holes 17 on the first blade block 7, the second blade block 8, the third blade block 9, and the first limiting block 10 are aligned with the first limiting holes 16 on the inner walls of the mounting grooves.

[0029] Then, the fixing screw 11 passes through the knife block fixing hole 17 and is screwed into the first limit hole 16 to fix the new knife block. After the new knife block is installed, the entire milling cutter is checked to ensure that all knife blocks are firmly installed, thereby further improving production efficiency.

[0030] Then, a simple test cutting is performed to verify the cutting effect of the new blade block and the overall performance of the milling cutter. The fourth blade 5 can effectively ensure the stability of the rotation of the first blade head 1, the first blade 2, the second blade 3, and the third blade 4 under the drive of the handle 6, thereby further improving production efficiency and product quality, and the chip groove 19 can discharge the debris to prevent the debris from damaging the entire milling cutter, making it convenient for users to use.

[0031] 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.

[0032] 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 replaceable wear-resistant step milling cutter for machining an automobile crankshaft, comprising a first cutter head (1), characterized in that: A first blade body (2) is fixedly connected below the first blade head (1), a second blade body (3) is fixedly connected below the first blade body (2), a third blade body (4) is fixedly connected below the second blade body (3), a fourth blade body (5) is fixedly connected below the third blade body (4), and chip removal grooves (19) are also provided on the outside of the first blade head (1), the first blade body (2), the second blade body (3), the third blade body (4) and the fourth blade body (5); A fourth mounting groove (15) is formed on the outer periphery of the first blade head (1) and the first blade body (2), a third mounting groove (14) is formed on the outer periphery of the second blade body (3), a second mounting groove (13) is formed on the outer periphery of the third blade body (4), a first mounting groove (12) is formed on the outer periphery of the fourth blade body (5), and a handle (6) is fixedly connected to the lower portion of the fourth blade body (5).

2. A replaceable wear-resistant step milling cutter for machining an automobile crankshaft according to claim 1, characterized in that: First limiting holes (16) are provided on the inner wall surfaces of the first mounting groove (12), the second mounting groove (13), the third mounting groove (14) and the fourth mounting groove (15).

3. The replaceable wear-resistant step milling cutter for machining an automobile crankshaft according to claim 2, characterized in that: A first limiting block (10) is fixedly mounted on the outer wall surface of the first mounting groove (12).

4. The replaceable wear-resistant step milling cutter for machining an automobile crankshaft according to claim 2, characterized in that: A third blade block (9) is fixedly mounted on the outer wall surface of the second mounting groove (13).

5. The replaceable wear-resistant step milling cutter for machining an automobile crankshaft according to claim 2, characterized in that: A second blade block (8) is fixedly mounted on the outer wall surface of the third mounting groove (14), and a first blade block (7) is fixedly mounted on the outer wall surface of the fourth mounting groove (15).

6. A replaceable wear-resistant step milling cutter for machining an automobile crankshaft according to claim 5, characterized in that: A blade block cutting edge (18) is fixedly connected to the right side of the outer wall of the first blade block (7), the second blade block (8) and the third blade block (9).

7. A replaceable wear-resistant step milling cutter for machining an automobile crankshaft according to claim 6, characterized in that: The outer wall surfaces of the first blade block (7), the second blade block (8), the third blade block (9) and the first limit block (10) are provided with blade block fixing holes (17), and the internal threads of the blade block fixing holes (17) are provided with fixing screws (11).

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