Inner cooling type cutter structure

Abstract

An inner cooling type cutter structure comprises a cutter handle and a cutter head, a plurality of side blades are spirally arranged on the outer side face of the cutter head, chip grooves are formed between the side blades, an end blade is arranged at the end of the cutter head, a connecting part is arranged between the cutter handle and the cutter head, and the connecting part is of a hollow structure. An annular partition plate is arranged in the connecting part and divides an inner cavity of the connecting part into an air cooling cavity and a liquid cooling cavity, an air inlet is formed in the outer side of the air cooling cavity, a plurality of air cooling pipes are arranged at the end, close to the cutter head, of the air cooling cavity, a liquid inlet pipe is coaxially arranged in the cutter handle, and the liquid outlet end of the liquid inlet pipe is communicated with the liquid cooling cavity. A liquid outlet pipe is coaxially arranged in the tool bit, the liquid inlet end of the liquid outlet pipe is communicated with the liquid cooling cavity, a plurality of liquid cooling pipes are arranged on the outer side face of the tool bit, and liquid cooling grooves are formed between the end edges of the end of the tool bit. The tool is cooled by liquid cooling and air cooling at the same time, so that the cooling efficiency is improved, the machining is convenient, and the machining cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical processing tool technical field, concretely relates to an internal cooling type tool structure. BACKGROUND

[0002] In metal cutting, the severe friction and plastic deformation of the tool and the workpiece will generate a large amount of cutting heat, which will cause the tool material to soften, the coating to peel off, and the thermal cracks to expand, severely shortening the tool life and reducing the machining accuracy. Traditional external cooling (such as spray cooling) cannot effectively reach the cutting area due to the cooling medium, especially in the machining of deep cavities, narrow gaps or difficult-to-machine materials, resulting in cooling lag, insufficient lubrication and other problems. The internal cooling tool directly delivers the cooling medium to the cutting area through the internal channel, which can remove a large amount of cutting heat and cool the cutting edge, significantly improving the thermal management efficiency.

[0003] Currently, the mainstream internal cooling tool mainly has a single straight or spiral channel inside the tool handle and tool head, which delivers the cooling liquid to the vicinity of the tool tip through a high-pressure pump, and sprays it to the cutting area through the front end nozzle for cooling. Some tools have a multi-hole structure on the bottom edge or rake face, which achieves local cooling through jet impact. The cooling medium is concentrated on the rake face or bottom edge, and the side edge and end edge cannot be effectively covered due to structural limitations, resulting in local thermal deformation and blade edge collapse. Moreover, the traditional solution only relies on cooling liquid or gas, which cannot meet the cooling and chip removal requirements. The pure liquid cooling system is prone to channel blockage due to chip adhesion during machining, and the pure gas cooling system has insufficient heat dissipation capacity.

[0004] In addition, the spiral channel of the current internal cooling tool is difficult to machine, and requires separate mold manufacturing and processing tools, which is high in manufacturing cost and low in processing efficiency. Some tools have a multi-hole structure on the bottom edge or rake face, which is machined on the structure of the cutting edge itself, destroying the completeness and rigidity, and greatly reducing the service life of the tool.

[0005] To solve the above problems, the utility model provides an internal cooling tool structure cooled by dual medium. UTILITY MODEL CONTENT

[0006] The utility model aims at providing an internal cooling tool structure, which is cooled and cooled by liquid cooling and gas cooling at the same time, improving the cooling efficiency, and being easy to process and reducing the processing cost.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme:

[0008] The utility model provides a kind of inner cooling type cutter structure, including handle and tool head, the helical side edge of the outer side of the tool head is equipped with several side edges, and the side edge is equipped with chip flute, and the end of the tool head is equipped with end edge, and the handle and tool head are provided with connecting part, the connecting part is hollow structure, and the connecting part is equipped with annular baffle, and the baffle separates the cavity in connecting part into outside gas cooling cavity and inside liquid cooling cavity, and the outside of the gas cooling cavity is equipped with air inlet, and the gas cooling cavity is equipped with several gas cooling pipes near tool head one end, and the handle is coaxially provided with liquid inlet pipe, and the liquid outlet end of the liquid inlet pipe is communicated with liquid cooling cavity, and the tool head is coaxially provided with liquid outlet pipe, and the liquid inlet end of the liquid outlet pipe is communicated with liquid cooling cavity, and the outer side of the tool head is equipped with several liquid cooling pipes, and the liquid cooling pipe is communicated with liquid outlet pipe, and the end edge between the end of the tool head is equipped with liquid cooling groove, and the liquid cooling groove is communicated with the liquid outlet end of liquid outlet pipe.

[0009] As a preferred technical solution, the end edge corresponds to the side edge one by one, and the end edge is arranged at the end of the side edge.

[0010] As a preferred technical solution, the air inlet is arranged on the outer wall of the gas cooling cavity through a rotating ring, the air inlet is communicated with the gas cooling cavity through the rotating ring, and the rotating ring is rotatably connected with the side wall of the gas cooling cavity through bearings at both ends.

[0011] As a preferred technical solution, the gas inlet end of the gas cooling pipe is communicated with the gas cooling cavity, the gas outlet end of the gas cooling pipe is located in the chip flute after penetrating through the connecting part, the gas cooling pipe is inclined, and the gas outlet end of the gas cooling pipe is inclined to the groove bottom of the chip flute.

[0012] As a preferred technical solution, the liquid cooling groove is communicated with the chip flute.

[0013] As a preferred technical solution, the liquid outlet end of the liquid cooling pipe is located in the chip flute.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. In the utility model, the cutting tool is cooled and cooled by liquid cooling and gas cooling at the same time, the cooling liquid flows out from the liquid cooling pipe and the liquid cooling groove, and the side edge and the end edge are cooled respectively, the cooling efficiency is improved, the cooling dead angle is reduced, the local temperature of the cutting tool is avoided, the gas cooling pipe is inclined, the gas is sprayed into the chip flute, the gas is sprayed along the shape of the chip flute to form a certain airflow direction and pressure, the side edge is cooled, and the cutting chips generated in the cutting process are rapidly blown away from the cutting area.

[0016] 2、The utility model discloses, liquid cooling pipe is arranged in the chip removal groove between side blade, liquid cooling groove is arranged between end blade, and is not processed on the structure of side blade or end blade itself, guarantees the completeness and rigidity of side blade and end blade, and liquid cooling pipe and liquid cooling groove can be used with conventional trepanning and grooving tool, need not carry out complex special hole processing, the area between chip removal groove and end blade is relatively open, also facilitate drilling and other processing operations. BRIEF DESCRIPTION OF DRAWINGS

[0017] The specific embodiments of the utility model will be further described in detail below with reference to the drawings:

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

[0019] Figure 2 It is front view of the utility model;

[0020] Figure 3 It is sectional of the utility model Figure 1 ;

[0021] Figure 4 It is side view of the utility model;

[0022] Figure 5 It is sectional of the utility model Figure 2 ;

[0023] Figure 6 It is sectional view of the utility model connecting portion;

[0024] Among them, the reference signs are as follows:

[0025] 1-shank, 2-connection, 21-gas cooling cavity, 22-baffle, 23-liquid cooling cavity, 24-gas inlet, 25 gas cooling pipe, 3-head, 31-side blade, 32-chip removal groove, 33-end blade, 4-liquid cooling mechanism, 41-liquid inlet pipe, 42-liquid outlet pipe, 43-liquid cooling pipe, 44-liquid cooling groove. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0027] Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the application. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0028] In the description of the present application, it should be noted that if the orientation or position relationship indicated by the terms "center", "upper", "lower", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product of the application is used, it is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, if the terms "arrangement", "installation", "connection" appear, they should be understood broadly, for example, they can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be connected inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] Embodiments

[0030] As shown in Figures 1-6 , an internal cooling tool structure includes a tool handle 1 and a tool head 3, and a connecting portion 2 is arranged between the tool handle 1 and the tool head 3.

[0031] A plurality of side edges 31 are spirally arranged on the outer side surface of the tool head 3, and a chip removal groove 32 is arranged between the side edges 31. An end edge 33 is arranged at the end of the tool head 3, and the end edge 33 corresponds to the side edge 31 one by one. The side edge 31 and the end edge 33 cut the side surface of the workpiece through the rotation or linear motion of the tool head 3. The chip removal groove 32 is mainly used for discharging chips to prevent the chips from blocking or scratching the surface of the workpiece.

[0032] The connecting portion 2 is a hollow structure, and a ring-shaped partition plate 22 is arranged in the connecting portion 2. The partition plate 22 divides the inner cavity of the connecting portion 2 into an air cooling cavity 21 on the outer side and a liquid cooling cavity 23 on the inner side. The air cooling cavity 21 is used for storing cooling gas, and the liquid cooling cavity 23 is used for storing cooling liquid.

[0033] An air inlet 24 is provided on the outside of the air-cooled chamber 21. The air inlet 24 is connected to an external high-pressure air tank through an air pipe. The high-pressure air tank supplies cooling gas into the air-cooled chamber 21 through the air pipe. Several air-cooling pipes 25 are provided on one end of the air-cooled chamber 21 near the cutter head 3. The cooling gas in the air-cooled chamber 21 is sprayed out through several air-cooling pipes 25. The cooling gas carries heat and cools down several side cutting edges 31, reducing thermal deformation and thermal wear, and extending the service life of the tool.

[0034] The air inlet 24 is mounted on the air-cooled cavity 21 via a rotating ring, and the air inlet 24 passes through the rotating ring and communicates with the air-cooled cavity 21. Both ends of the rotating ring are rotatably connected to the side walls of the air-cooled cavity 21 via bearings. The bearings are sealed with self-compensating seals to prevent air leakage from the cooling cavity 21. In this embodiment, a wave spring-compensated O-ring seal is preferred. The rotating ring can rotate relative to the air-cooled cavity 21, and the connecting part 2 has an annular partition 22 inside. The two ends of the partition 22 are connected to the side walls of both ends of the connecting part 2, providing support and ensuring the stability of the connecting part 2. When the tool is working, the machine tool clamps and drives the tool to rotate, fixing the air pipe connected to the high-pressure air tank. This allows the air inlet 24 on the rotating ring to rotate relative to the air-cooled cavity 21, preventing the air pipe from becoming entangled and affecting the cutting operation.

[0035] A liquid inlet pipe 41 is coaxially provided inside the tool holder 1. The liquid inlet end of the liquid inlet pipe 41 is located at the end of the tool holder 1 and is connected to an external coolant storage tank. The liquid outlet end of the liquid inlet pipe 41 is connected to the liquid cooling chamber 23, and the liquid inlet pipe 41 delivers coolant into the liquid cooling chamber 23. A liquid outlet pipe 42 is coaxially provided inside the tool head 3. The liquid inlet end of the liquid outlet pipe 42 is connected to the liquid cooling chamber 23, and the liquid outlet pipe 42 delivers coolant from the liquid cooling chamber 23 into the tool head 3. Several liquid cooling pipes 43 are provided on the outer surface of the tool head 3, and the liquid cooling pipes 43 are connected to the liquid outlet pipes 43. The pipe 42 is connected, and part of the coolant in the outlet pipe 42 flows out through the liquid cooling pipe 43 to cool the side edge 31. The other part flows out through the outlet end of the outlet pipe 42 to cool the end edge 33. A liquid cooling groove 44 is provided between the end edges 33 at the end of the cutter head 3. The liquid cooling groove 44 is connected to the outlet end of the outlet pipe 42. The coolant flows out from several liquid cooling grooves 44 to distribute the coolant, so that the coolant can cool each end edge 33, reduce thermal deformation and thermal wear, and extend the service life of the tool.

[0036] Specifically, the machine tool fixes the cutting tool with a tool holder, and then drives the tool to rotate by rotating the tool holder. Since the end of the tool holder 1 is the inlet end of the liquid inlet pipe 41, when selecting the tool holder, it is necessary to ensure that the end of the tool holder 1 is not obstructed after the tool holder clamps the tool holder, such as with HSK100. This allows the liquid inlet pipe 41 to be connected to an external coolant storage tank through a water pipe. A rotary joint is provided at the connection point, allowing the water pipe to be rotatably connected to the liquid inlet pipe 41, thus fixing the water pipe and preventing damage to the water pipe caused by the rotation of the tool holder 1.

[0037] Further, the liquid cooling pipe 43 is arranged in the chip removal groove 32 between the side edges 31, and the liquid cooling groove 44 is arranged between the end edges 33, without machining the structure of the side edges 31 or the end edges 33 itself, so that the integrity and rigidity of the side edges 31 and the end edges 33 are ensured, and the liquid cooling pipe 43 and the liquid cooling groove 44 can be machined by conventional drilling and grooving tools without complex special hole machining, and the area between the chip removal groove 32 and the end edges 33 is relatively open, which is also convenient for drilling and other machining operations.

[0038] In some feasible embodiments, the gas inlet end of the gas cooling pipe 25 is in communication with the gas cooling cavity 21, the gas outlet end of the gas cooling pipe 25 is located in the chip removal groove 32 after penetrating through the connecting part 2, the gas cooling pipe 25 is arranged obliquely, the gas outlet end of the gas cooling pipe 25 is inclined to the groove bottom of the chip removal groove 32, the cooling gas in the gas cooling pipe 25 is inclinedly sprayed into the chip removal groove 32, the cooling gas can spread along the chip removal groove 32 to cool and lower the temperature of the side edges 31, reduce thermal deformation and thermal wear, and prolong the service life of the tool, at the same time, the cooling gas forms a certain airflow direction and pressure along the shape of the chip removal groove 32, rapidly blows the chips generated in the cutting process away from the cutting area, prevents the chips from accumulating and blocking in the chip removal groove 32, reduces tool wear and workpiece surface scratches caused by the chips, and improves the machining surface quality.

[0039] In some feasible embodiments, the liquid cooling groove 44 is in communication with the chip removal groove 32, and the cooling liquid enters the chip removal groove 32 through the liquid cooling groove 44, which can quickly absorb and take away a large amount of cutting heat, prolong the service life of the side edges 31, and when the cooling liquid flows in the chip removal groove 32, a certain pressure and scouring force can be generated to forcibly push the chips generated in the cutting process out of the cutting area.

[0040] In some feasible embodiments, the liquid outlet end of the liquid cooling pipe 43 is located in the chip removal groove 32, and after the cooling liquid is sprayed out of the liquid cooling pipe 43, it can directly contact the side edges 31 to quickly absorb the cutting heat generated by the side edges 31, lower the temperature of the side edges 31, and at the same time, the cooling liquid can also flush the chips generated in the cutting process away from the cutting area, preventing the chips from accumulating and blocking in the chip removal groove 32.

[0041] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand. The embodiments of the present disclosure have been described in detail. In order not to obscure the concept of the present disclosure, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description. The scope of the present disclosure is defined by the appended claims.

Claims

1. An internal cooling type cutting tool structure comprising a shank (1) and a head (3), characterized in that, The outer side of the tool bit (3) is spirally provided with a plurality of side edges (31), and a chip groove (32) is arranged between the side edges (31); the end of the tool bit (3) is provided with an end edge (33); a connecting part (2) is arranged between the tool handle (1) and the tool bit (3); the connecting part (2) is a hollow structure; a ring-shaped partition plate (22) is arranged in the connecting part (2); the partition plate (22) divides the inner cavity of the connecting part (2) into an air cooling cavity (21) on the outer side and a liquid cooling cavity (23) on the inner side; the air cooling cavity (21) is provided with an air inlet (24) on the outer side; a plurality of air cooling pipes (25) are arranged on the end of the air cooling cavity (21) close to the tool bit (3); a liquid inlet pipe (41) is coaxially arranged in the tool handle (1); the liquid outlet end of the liquid inlet pipe (41) is communicated with the liquid cooling cavity (23); a liquid outlet pipe (42) is coaxially arranged in the tool bit (3); the liquid inlet end of the liquid outlet pipe (42) is communicated with the liquid cooling cavity (23); a plurality of liquid cooling pipes (43) are arranged on the outer side of the tool bit (3); the liquid cooling pipes (43) are communicated with the liquid outlet pipe (42); a liquid cooling groove (44) is arranged between the end edges (33) on the end of the tool bit (3); the liquid cooling groove (44) is communicated with the liquid outlet end of the liquid outlet pipe (42).

2. The internal cooling tool structure according to claim 1, wherein The end edge (33) corresponds to the side edge (31) one by one, and the end edge (33) is arranged on the end of the side edge (31).

3. The internal cooling tool structure according to claim 1, wherein The air inlet (24) is arranged on the outer side wall of the air cooling cavity (21) through a rotating ring; the air inlet (24) is communicated with the air cooling cavity (21) through the rotating ring; the rotating ring is rotatably connected with the side wall of the air cooling cavity (21) through bearings at both ends.

4. The internal cooling tool structure according to Claim 1, wherein The air inlet end of the air cooling pipe (25) is communicated with the air cooling cavity (21); the air outlet end of the air cooling pipe (25) is located in the chip groove (32) after penetrating through the connecting part (2); the air cooling pipe (25) is arranged obliquely; the air outlet end of the air cooling pipe (25) is inclined to the groove bottom of the chip groove (32).

5. The internal cooling tool structure according to Claim 1, wherein The liquid cooling groove (44) is communicated with the chip groove (32).

6. The internal cooling tool structure according to Claim 1, wherein The liquid outlet end of the liquid cooling pipe (43) is located in the chip groove (32).

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