Composite-edge deep hole milling cutter for machining automobile crankshaft

Abstract

The utility model belongs to the technical field of deep-hole milling cutters, particularly relates to a composite-edge deep-hole milling cutter for machining an automobile crankshaft, and solves the problems that a cutting edge is abraded in a long-time use process, and the cutting edge, a tool bit and a tool bar are of an integrated connecting structure, so that the tool bit and the tool bar need to be replaced together when the cutting edge is replaced, and the machining cost is reduced. According to the technical scheme, the cutter comprises a cutter root base, a first cutter root is fixedly installed at the upper end of the cutter root base, a first cutter bar is fixedly connected to the upper portion of the first cutter root, a center shaft is fixedly arranged in the center of the first cutter root, and a cutting tool bit is installed at the upper end of the first cutter bar in a threaded mode; a tool bit mounting groove is formed in the connecting position of the first tool bar and the cutting tool bit, the tool bit mounting groove is located in the center of the first tool bar, and a tool bit connecting block is fixedly connected to the connecting position of the cutting tool bit and the first tool bar. The whole tool bit and the whole tool bar do not need to be replaced, so that the cost of a user is greatly reduced.

Description

Technical Field

[0001] The utility model relates to a metal cutting tool, in particular to a composite blade deep hole milling cutter for machining automobile crankshafts, belonging to the technical field of deep hole milling cutters. Background Art

[0002] In the automobile manufacturing industry, the crankshaft is a key component of the engine, and its processing accuracy directly affects the performance and life of the engine.

[0003] Some existing deep hole drilling and milling cutters lack the necessary positioning base when connected to the machine tool, resulting in low docking efficiency. In addition, during use, the cutter head is prone to loosening and damage the tool. In addition, some deep hole drilling and milling cutters cannot quickly position the workpiece during use, resulting in the milling position deviating during milling, affecting the milling accuracy.

[0004] The utility model discloses a deep hole drilling milling cutter with a positioning base, which includes a cutter bar and a cutter head. The utility model sets a positioning base and a positioning rod. During the positioning and installation process with a machine tool, as the positioning rod is continuously inserted into the positioning hole of the machine tool, the machine tool continuously squeezes the movable rod to move downward until the buffer pad contacts the upper surface of the positioning base. The elastic force of the spring is used to make the connection between the machine tool and the cutter more secure. By fixing a centering device at the center of the lower end of the cutter head, the milling position can be quickly positioned to avoid deviation of the position during milling and improve the milling accuracy.

[0005] In the above technical solution, the elastic force of the spring is utilized to make the connection between the machine tool and the tool more secure, and by fixing a centering device at the center position of the lower end of the cutter head, the milling position can be quickly positioned to avoid position deviation during milling and improve the milling accuracy. However, during long-term use, the cutting edge will wear out, and the cutting edge, the cutter head and the tool rod are an integrated connection structure. Therefore, when replacing the cutting edge, the cutter head and the tool rod need to be replaced together, which will increase the user cost. For this reason, we provide a composite blade deep hole milling cutter for automobile crankshaft processing. Utility Model Content

[0006] The utility model aims to solve the problem that the cutting edge will wear out during long-term use, and the cutting edge, the cutter head and the cutter rod are an integrated connection structure. Therefore, when replacing the cutting edge, the cutter head and the cutter rod need to be replaced together, which increases the user cost. A composite blade deep hole milling cutter for automobile crankshaft processing is provided to solve the problem that the cutting edge will wear out during long-term use, and the cutting edge, the cutter head and the cutter rod are an integrated connection structure. Therefore, when replacing the cutting edge, the cutter head and the cutter rod need to be replaced together, which increases the user cost.

[0007] The utility model achieves the above-mentioned purpose through the following technical scheme: a composite blade deep hole milling cutter for machining an automobile crankshaft, comprising a root base, a first root is fixedly installed on the upper end of the root base, a first tool rod is fixedly connected above the first root, a central axis is fixedly arranged at the center position of the first root, and a cutting tool head is threadedly installed on the upper end of the first tool rod;

[0008] A bit installation groove is provided at the connection between the first tool rod and the cutting bit, and the bit installation groove is located in the center of the first tool rod. A bit connection block is fixedly connected at the connection between the cutting bit and the first tool rod, and the bit connection block is located at the lower end of the cutting bit.

[0009] As a further solution of the utility model: a base clamping surface is provided on the lower outer wall of the knife base, and a second limiting hole is provided on the outer wall of the knife base, and the second limiting hole is located above the base clamping surface.

[0010] As a further solution of the utility model: a chip removal groove is provided on the outer periphery of the first tool rod, and a chip withdrawal groove is provided on the outer periphery of the cutting tool head.

[0011] As a further solution of the utility model: a cutting edge is arranged at the top of the cutting bit, and the outer wall of the cutting edge is covered with a cutting coating.

[0012] As a further solution of the utility model: a limiting pin is movably installed inside the second limiting hole, and a limiting block is arranged outside the center of the limiting pin.

[0013] As a further solution of the utility model: a knife bar installation groove is provided at the connection between the knife root base and the first knife root, and the knife bar installation groove is located inside the upper end surface of the knife root base.

[0014] As a further solution of the utility model: a knife bar connecting block is fixedly provided at the connection between the first knife root and the knife root base, and a limiting groove is provided inside the knife bar connecting block.

[0015] As a further solution of the utility model: a first limiting hole is arranged at the upper end of the limiting groove, the first limiting hole is located inside the tool rod connecting block, and the limiting groove and the first limiting hole penetrate the inside of the tool rod connecting block.

[0016] The beneficial effects of the utility model are:

[0017] 1. In the utility model, the cutting head and the first tool rod can be disassembled and replaced by a threaded connection. When the cutting edge is worn due to long-term use, the user only needs to replace the cutting head, without replacing the entire cutting head and tool rod, thereby greatly reducing the user's cost. In addition, the cutting coating covering the outer wall of the cutting edge can reduce friction and heat during cutting, thereby improving cutting efficiency and tool life.

[0018] 2. The lower outer wall of the tool root base of the utility model is provided with a base clamping surface, which is convenient for the user to fix the tool on a machine tool or other processing equipment, and the outer periphery of the first tool rod is provided with a chip removal groove, and the outer periphery of the cutting head is provided with a chip withdrawal groove, which matches each other and can quickly remove chips, which helps to remove chips in time during the cutting process and prevent chips from accumulating in the cutting area, affecting the cutting effect and tool life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the cutter head connecting block and the cutter head mounting groove of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the tool bar installation groove and the tool bar connecting block of the utility model;

[0022] Figure 4 It is a schematic diagram of the internal structure of the knife root base and the first knife root of the utility model.

[0023] In the figure: 1. blade base; 2. first blade base; 3. first arbor; 4. center axis; 5. chip groove; 6. cutting bit; 7. chip groove; 8. cutting edge; 9. cutting coating; 10. base clamping surface; 11. bit connecting block; 12. bit mounting groove; 13. limit block; 14. limit pin; 15. second limit hole; 16. arbor mounting groove; 17. arbor connecting block; 18. limit groove; 19. first limit hole. DETAILED DESCRIPTION

[0024] 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

[0025] like Figures 1 to 4As shown, a composite blade deep hole milling cutter for machining an automobile crankshaft comprises a root base 1, a first root 2 is fixedly mounted on the upper end of the root base 1, a first tool rod 3 is fixedly connected to the upper part of the first root 2, a center axis 4 is fixedly arranged at the center position of the first root 2, a cutting bit 6 is threadedly mounted on the upper end of the first tool rod 3, a bit mounting groove 12 is provided at the connection between the first tool rod 3 and the cutting bit 6, the bit mounting groove 12 is located in the center of the first tool rod 3, a bit connecting block 11 is fixedly connected at the connection between the cutting bit 6 and the first tool rod 3, the bit connecting block 11 is located at the lower end of the cutting bit 6, the cutting bit 6 and the first tool rod 3 can be disassembled and replaced by a threaded connection, when the cutting edge 8 is worn due to long-term use, the user only needs to replace the cutting bit 6 without replacing the entire cutter head and tool rod, thereby greatly reducing the cost for the user. Embodiment 2

[0026] In addition to all the technical features of the first embodiment, the present embodiment also includes: a base clamping surface 10 is provided on the lower outer wall of the blade base 1, a second limiting hole 15 is provided on the outer wall of the blade base 1, and the second limiting hole 15 is located above the base clamping surface 10; a base clamping surface 10 is provided on the lower outer wall of the blade base 1, which is convenient for users to fix the tool on a machine tool or other processing equipment; a chip removal groove 5 is provided on the periphery of the first tool rod 3, and a chip withdrawal groove 7 is provided on the periphery of the cutting head 6; the chip removal groove 5 is provided on the periphery of the first tool rod 3, and the chip withdrawal groove 7 is provided on the periphery of the cutting head 6, which cooperate with each other to quickly remove chips, help to remove chips in time during the cutting process, prevent chips from accumulating in the cutting area, and affect the cutting effect and tool life; a cutting edge is provided on the top of the cutting head 6 8. The outer wall of the cutting edge 8 is covered with a cutting coating 9. The cutting coating 9 covering the outer wall of the cutting edge 8 can reduce friction and heat during cutting, improve cutting efficiency and tool life, a limiting pin 14 is movably installed inside the second limiting hole 15, and a limiting block 13 is arranged outside the center of the limiting pin 14. A shank mounting groove 16 is provided at the connection between the blade root base 1 and the first blade root 2. The shank mounting groove 16 is located inside the upper end surface of the blade root base 1, and a shank connecting block 17 is fixedly arranged at the connection between the first blade root 2 and the blade root base 1. A limiting groove 18 is provided inside the shank connecting block 17, and a first limiting hole 19 is arranged at the upper end of the limiting groove 18. The first limiting hole 19 is located inside the shank connecting block 17, and the limiting groove 18 and the first limiting hole 19 pass through the inside of the shank connecting block 17.

[0027] Working principle:

[0028] First, the user fixes the tool on the machine tool through the base clamping surface 10, and then the tool bar connecting block 17 fixed under the first tool root 2 cooperates with the tool bar mounting groove 16 opened at the upper end of the tool root base 1 to achieve a stable connection. At the same time, the limit pin 14 and the limit block 13 are inserted into the second limit hole 15 and the first limit hole 19, and then the limit pin 14 is twisted to form a buckle between the limit block 13 and the limit groove 18, which can further increase the stability of the connection;

[0029] Secondly, when the cutting edge 8 on the cutting head 6 performs cutting work, the cutting coating 9 reduces the friction and heat during cutting, thereby improving the cutting efficiency and the tool life. In addition, during the cutting process, the chip removal groove 5 and the chip removal groove 7 cooperate with each other to quickly remove the chips and prevent the chips from accumulating in the cutting area, thereby ensuring the smoothness of the cutting process and the durability of the tool. The center shaft 4 can improve the stability of the tool during the milling process, and the surface vibrates, thereby avoiding damage to the tool during cutting.

[0030] Then, the threaded connection between the bit connecting block 11 at the lower end of the cutting bit 6 and the bit mounting groove 12 inside the first tool rod 3 provides convenience for the replacement of the cutting bit 6. When the cutting edge 8 is worn due to long-term use, the user can easily disassemble and replace the cutting head 6 through the threaded connection without replacing the entire bit and tool rod, thereby reducing the cost of 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 composite blade deep hole milling cutter for machining an automobile crankshaft, comprising a cutter root base (1), characterized in that: A first blade root (2) is fixedly mounted on the upper end of the blade root base (1); a first blade rod (3) is fixedly connected above the first blade root (2); a central axis (4) is fixedly arranged at the center position of the first blade root (2); and a cutting head (6) is threadedly mounted on the upper end of the first blade rod (3); A cutter head mounting groove (12) is provided at the connection between the first cutter bar (3) and the cutting cutter head (6), the cutter head mounting groove (12) being located in the center of the first cutter bar (3), and a cutter head connecting block (11) is fixedly connected at the connection between the cutting cutter head (6) and the first cutter bar (3), the cutter head connecting block (11) being located at the lower end of the cutting cutter head (6).

2. The composite blade deep hole milling cutter for machining an automobile crankshaft according to claim 1, characterized in that: A base clamping surface (10) is provided on the lower outer wall of the blade base (1), and a second limiting hole (15) is provided on the outer wall of the blade base (1), wherein the second limiting hole (15) is located above the base clamping surface (10).

3. The composite blade deep hole milling cutter for machining an automobile crankshaft according to claim 1, characterized in that: The outer circumference of the first tool rod (3) is provided with a chip removal groove (5), and the outer circumference of the cutting tool head (6) is provided with a chip withdrawal groove (7).

4. The composite blade deep hole milling cutter for machining an automobile crankshaft according to claim 3, characterized in that: The top end of the cutting bit (6) is provided with a cutting edge (8), and the outer wall of the cutting edge (8) is covered with a cutting coating (9).

5. The composite blade deep hole milling cutter for machining an automobile crankshaft according to claim 2, characterized in that: A limiting pin (14) is movably mounted inside the second limiting hole (15), and a limiting block (13) is arranged outside the center of the limiting pin (14).

6. The composite blade deep hole milling cutter for machining an automobile crankshaft according to claim 1, characterized in that: A knife bar installation groove (16) is provided at the connection between the knife base (1) and the first knife base (2), and the knife bar installation groove (16) is located inside the upper end surface of the knife base (1).

7. A composite blade deep hole milling cutter for machining an automobile crankshaft according to claim 6, characterized in that: A knife bar connecting block (17) is fixedly provided at the connection between the first knife root (2) and the knife root base (1), and a limiting groove (18) is provided inside the knife bar connecting block (17).

8. The composite blade deep hole milling cutter for machining an automobile crankshaft according to claim 7, characterized in that: A first limiting hole (19) is provided at the upper end of the limiting groove (18), the first limiting hole (19) is located inside the knife bar connecting block (17), and the limiting groove (18) and the first limiting hole (19) penetrate the inside of the knife bar connecting block (17).

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