Composite thread milling cutter with self-cooling structure

Abstract

The utility model belongs to the technical field of cutting tools, particularly relates to a milling cutter, and provides the following scheme aiming at the problem that a cutter head and a cutting edge cannot be automatically cooled in the operation process of the existing cutter: the milling cutter comprises a cutter bar, and the cutter head is fixed at one end of the cutter bar. The cutter head of the composite thread milling cutter is pressed downwards, so that a moving part moves towards the interior of the cutter head through a sliding groove III, a connecting plate and a telescopic spring, and a circulating hole corresponds to a cooling hole after movement; the cooling channel I and the cooling channel II are arranged in the cooling hole, so that cooling liquid in the cooling channel I and the cooling channel II can automatically flow into the cooling hole through the circulating hole when the composite thread milling cutter runs, the cutter head and the blade are automatically cooled according to the running state, the service life of the cutter is prolonged, and the service life of the cutter is prolonged when the composite thread milling cutter is not used. Part of the moving part is moved out of the interior of the tool bit, so that the inner wall of the tool bit seals the circulation hole, and the cooling liquid is prevented from flowing out infinitely to cause waste of the cooling liquid.

Description

Technical Field

[0001] The utility model relates to a milling cutter, in particular to a composite thread milling cutter with a self-cooling structure, belonging to the technical field of cutting. Background Art

[0002] A milling cutter is a rotary tool with one or more teeth used for milling. Each tooth cuts off the excess of the workpiece intermittently in sequence during operation. Milling cutters are mainly used to process planes, steps, grooves, forming surfaces and cut off workpieces on milling machines.

[0003] In the prior art, a vertical milling cutter disclosed in the announcement number CN209998438U includes a shank and a cutter head. The shank includes a body and a transition portion formed at one end of the shank. In the axial direction of the shank, a blind hole is formed on the end face of the transition portion away from the body. The cutter head is inserted into the blind hole with its coupling area and connected to the transition portion by welding. The welding point of the vertical milling cutter is at the connection between the coupling area of ​​the cutter head and the blind hole of the transition portion. Since the coupling area at this point is more sufficient, the welding strength is higher, the cutter is not easy to break, and the service life is effectively improved.

[0004] When the above technical solution is in use, the cutter head and the cutter handle are welded through a blind hole so that the cutter head and the cutter handle form an integrated structure, and the workpiece is processed by multiple cutting edges. However, since the cutter head and the cutter handle are an integrated fixed structure, and the cutter head cannot dissipate heat and cool down by itself during operation, when the end mill runs at high speed for a long time, a large amount of heat is generated, causing the temperature of the cutter head to rise rapidly, and when the blade is deformed and worn, the cutter head cannot be replaced and maintained, which shortens the service life of the tool. As a result, there is a problem that the tool cannot cool the cutter head and the blade by itself during operation. In view of this, a composite thread milling cutter with a self-cooling structure is provided to overcome the above defects. Utility Model Content

[0005] The utility model provides a composite thread milling cutter with a self-cooling structure in order to solve the problem that the above-mentioned cutter cannot cool the cutter head and the cutter edge by itself during operation.

[0006] The utility model achieves the above-mentioned purpose through the following technical scheme: a composite thread milling cutter with a self-cooling structure, comprising a tool rod, a tool head is fixed at one end of the tool rod, a cooling hole is opened on the outer surface of one end of the tool head, a clamping groove is opened at the other end of the tool rod, and a cooling channel is opened inside the tool rod;

[0007] A slide groove 1 is provided inside the cutter head, a telescopic spring is fixed inside the slide groove 1, a connecting plate is fixed to one end of the telescopic spring, a moving part is fixedly connected to one side of the connecting plate, a cooling channel 2 is provided inside one end of the moving part, and a circulation hole is provided on the outer side of one end of the cooling channel 2.

[0008] As a further solution of the utility model: a sliding structure is formed between the moving part and the cutter head, and a telescopic structure is formed between the connecting plate and the slide groove 1 through a telescopic spring.

[0009] As a further solution of the utility model: a fixing head is arranged on the outer surface of the other end of the knife rod, and a mounting hole is opened at one end of the fixing head.

[0010] As a further solution of the utility model: a contraction groove is opened on the inner wall of the fixed head, a return spring 1 is fixed on the inner wall of the contraction groove, and one end of the return spring 1 is fixedly connected to a clamping block.

[0011] As a further solution of the utility model: a moving rod is fixedly connected to one side of the clamping block, a second return spring is fixedly connected to the top of the moving rod, and a third slide groove is fixedly connected to one end of the second return spring.

[0012] As a further solution of the utility model: a second slide groove is provided on the outer surface of the other end of the fixed head, and a sealing plate is slidably connected inside the second slide groove.

[0013] As a further solution of the utility model: a coolant storage tank is provided inside the other end of the fixed head, an infusion hole is provided at one end of the coolant storage tank, and a positioning rod is fixed at one end of the infusion hole.

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

[0015] When the composite thread milling cutter is used to process a workpiece, the composite thread milling cutter head can be pressed downward to allow the movable part to move toward the interior of the cutter head through the slide groove three, the connecting plate and the telescopic spring. After the movement, the flow hole corresponds to the cooling hole, so that when the composite thread milling cutter is running, the coolant in the cooling channel one and the cooling channel two can automatically flow into the cooling hole through the flow hole, and the cutter head and the cutting edge can be cooled automatically according to the running state, thereby improving the service life of the tool. When the composite thread milling cutter is not in use, the movable part can be partially moved out of the cutter head, so that the inner wall of the cutter head can seal the flow hole to prevent the coolant from flowing out uncontrollably and causing waste of coolant. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the knife body of the utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the fixed head of the utility model;

[0019] Figure 4It is a schematic diagram of the internal structure of the knife body of the utility model.

[0020] In the figure: 1. knife bar; 2. clamping groove; 3. knife head; 4. reset spring 2; 5. moving rod; 6. cooling hole; 7. cooling channel 1; 8. slide 1; 9. telescopic spring; 10. moving part; 11. cooling channel 2; 12. circulation hole; 13. connecting plate; 14. fixed head; 15. mounting hole; 16. coolant storage tank; 17. slide 2; 18. sealing plate; 19. infusion hole; 20. positioning rod; 21. contraction groove; 22. reset spring 1; 23. clamping block; 24. slide 3. DETAILED DESCRIPTION

[0021] 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

[0022] like Figures 1 to 4 As shown, a composite thread milling cutter with a self-cooling structure comprises a tool bar 1, a tool head 3 is fixed at one end of the tool bar 1, a cooling hole 6 is provided on the outer surface of one end of the tool head 3, a clamping groove 2 is provided at the other end of the tool bar 1, and a cooling channel 7 is provided inside the tool bar 1. Through the cooling hole 6 and the cooling channel 7, the coolant can be easily transported and discharged to cool the composite thread milling cutter in operation;

[0023] A slide groove 8 is provided inside the cutter head 3, a telescopic spring 9 is fixed inside the slide groove 8, a connecting plate 13 is fixed at one end of the telescopic spring 9, a moving part 10 is fixedly connected to one side of the connecting plate 13, a cooling channel 2 11 is provided inside one end of the moving part 10, a flow hole 12 is provided on the outer side of one end of the cooling channel 2 11, when the composite thread milling cutter is used to process the workpiece, the composite thread milling cutter head 3 is pressed downward to make the moving part 10 move to the inside of the cutter head 3 through the slide groove 3 24, the connecting plate 13 and the telescopic spring 9, and the flow hole 12 corresponds to the cooling hole 6 after the movement, so that when the composite thread milling cutter is running, the coolant in the cooling channel 1 7 and the cooling channel 2 11 can automatically flow into the cooling hole 6 through the flow hole 12, and the cutter head 3 and the blade can be cooled automatically according to the operating state. Embodiment 2

[0024] In addition to all the technical features of the first embodiment, this embodiment also includes:

[0025] A sliding structure is formed between the moving part 10 and the cutter head 3, and a telescopic structure is formed between the connecting plate 13 and the slide groove 8 through the telescopic spring 9. When the composite thread milling cutter is used to process the workpiece, the composite thread milling cutter head 3 is pressed downward to make the moving part 10 move toward the inside of the cutter head 3 through the slide groove 3 24, the connecting plate 13 and the telescopic spring 9. After the movement, the flow hole 12 corresponds to the cooling hole 6, so that when the composite thread milling cutter is running, the coolant in the cooling channel 1 7 and the cooling channel 2 11 can automatically flow into the cooling hole 6 through the flow hole 12, and the cutter head 3 and the blade can be cooled automatically according to the operating status to improve the service life of the tool. When the composite thread milling cutter is not in use, the moving part 10 can be partially moved out of the cutter head 3 to seal the flow hole 12 on the inner wall of the cutter head 3 to prevent the coolant from flowing out uncontrollably and causing waste of coolant.

[0026] A fixing head 14 is disposed on the outer surface of the other end of the tool rod 1 , and a mounting hole 15 is opened at one end of the fixing head 14 . The composite thread milling cutter can be installed in the fixing head 14 through the mounting hole 15 , so that the clamping block 23 clamps the tool rod 1 .

[0027] A contraction groove 21 is provided on the inner wall of the fixed head 14, and a return spring 22 is fixed to the inner wall of the contraction groove 21. One end of the return spring 22 is fixedly connected to a clamping block 23. The clamping block 23 can be contracted into the contraction groove 21 through the return spring 22, so that the tool rod 1 can be installed inside the fixed head 14, and then the tool rod 1 can be clamped and fixed by the rebound of the clamping block 23.

[0028] A moving rod 5 is fixedly connected to one side of the clamping block 23, and a return spring 24 is fixedly connected to the top of the moving rod 5. One end of the return spring 24 is fixedly connected to a slide groove 3. The moving rod 5 can drive the clamping block 23 to move, so that the clamping block 23 can be extended and retracted in the contraction groove 21 to facilitate clamping the knife rod 1. The moving rod 5 can be rebounded by the return spring 24, and the clamping block 23 can be driven to rebound.

[0029] A second slide groove 17 is formed on the outer surface of the other end of the fixed head 14 , and a sealing plate 18 is slidably connected inside the second slide groove 17 . The sealing plate 18 slides in the second slide groove 17 , so that the coolant in the coolant storage tank 16 can be easily replenished.

[0030] A coolant storage tank 16 is provided inside the other end of the fixed head 14, an infusion hole 19 is provided at one end of the coolant storage tank 16, a positioning rod 20 is fixed at one end of the infusion hole 19, and the coolant can be conveniently input into the cooling channel 7 inside the tool rod 1 through the infusion hole 19 and the positioning rod 20.

[0031] Working principle: the moving rod 5 in the moving slide groove three 24 allows the clamping block 23 to shrink into the shrinking groove 21 through the return spring two 4 and the return spring one 22, and then the tool rod 1 of the composite thread milling cutter is installed into the interior of the fixed head 14 through the mounting hole 15, so that the cooling channel one 7 at one end of the tool rod 1 is plugged into the positioning rod 20, and then the moving rod 5 is loosened to allow the clamping block 23 to clamp the clamping groove 2 of the tool rod 1, and before using the composite thread milling cutter to process the workpiece, the coolant can be input into the coolant storage groove 16 through the sealing plate 18 in the sliding slide groove two 17, and then the coolant is input into the cooling channel one 7 and the cooling channel two 11 of the moving part 10 through the infusion hole 19 at the bottom of the coolant storage groove 16 and the hollow positioning rod 20, and when the milling cutter stops processing the workpiece, the moving part 10 can be moved through the telescopic spring 9 in the slide groove one 8 and the connecting plate 13 on the moving part 10. One end of the moving part 10 moves out of the interior of the cutter head 3, so that the flow hole 12 on the side of the cooling channel 2 11 on the moving part 10 is offset from the cooling hole 6, and the flow hole 12 is sealed by the inner wall of the cutter head 3 while being offset, so that the coolant cannot flow out. This can prevent the coolant from automatically flowing out of the cooling hole 6 to cool the cutter head 3 and the blade when the composite thread milling cutter stops processing the workpiece, thereby reducing the waste of coolant. When the composite thread milling cutter is used to process the workpiece, the composite thread milling cutter head 3 can be pressed downward to move the moving part 10 to the interior of the cutter head 3 through the slide groove 3 24, the connecting plate 13 and the telescopic spring 9. After the movement, the flow hole 12 corresponds to the cooling hole 6, so that when the composite thread milling cutter is running, the coolant in the cooling channel 1 7 and the cooling channel 2 11 can automatically flow into the cooling hole 6 through the flow hole 12, thereby automatically cooling the running cutter head 3 and the blade.

[0032] 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.

[0033] 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 thread milling cutter with a self-cooling structure, comprising a cutter bar (1), characterized in that: A cutter head (3) is fixed to one end of the cutter rod (1), a cooling hole (6) is provided on the outer surface of one end of the cutter head (3), a clamping groove (2) is provided at the other end of the cutter rod (1), and a cooling channel (7) is provided inside the cutter rod (1); A slide groove (8) is provided inside the cutter head (3), a telescopic spring (9) is fixed inside the slide groove (8), a connecting plate (13) is fixed to one end of the telescopic spring (9), a moving part (10) is fixedly connected to one side of the connecting plate (13), a cooling channel (11) is provided inside one end of the moving part (10), and a circulation hole (12) is provided on the outer side of one end of the cooling channel (11).

2. The composite thread milling cutter with a self-cooling structure according to claim 1, characterized in that: A sliding structure is formed between the moving member (10) and the cutter head (3), and a telescopic structure is formed between the connecting plate (13) and the slide groove 1 (8) via a telescopic spring (9).

3. The composite thread milling cutter with a self-cooling structure according to claim 1, characterized in that: A fixing head (14) is provided on the outer surface of the other end of the knife rod (1), and a mounting hole (15) is provided at one end of the fixing head (14).

4. The composite thread milling cutter with a self-cooling structure according to claim 3, characterized in that: The inner wall of the fixed head (14) is provided with a contraction groove (21), the inner wall of the contraction groove (21) is fixed with a return spring 1 (22), and one end of the return spring 1 (22) is fixedly connected with a clamping block (23).

5. The composite thread milling cutter with a self-cooling structure according to claim 4, characterized in that: A moving rod (5) is fixedly connected to one side of the clamping block (23), a second return spring (4) is fixedly connected to the top of the moving rod (5), and a third slide groove (24) is fixedly connected to one end of the second return spring (4).

6. The composite thread milling cutter with a self-cooling structure according to claim 5, characterized in that: A second slide groove (17) is provided on the outer surface of the other end of the fixed head (14), and a sealing plate (18) is slidably connected inside the second slide groove (17).

7. The composite thread milling cutter with a self-cooling structure according to claim 6, characterized in that: A coolant storage tank (16) is provided inside the other end of the fixed head (14), an infusion hole (19) is provided at one end of the coolant storage tank (16), and a positioning rod (20) is fixed at one end of the infusion hole (19).

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