Cutting knife for machining lathe

Abstract

The utility model relates to the technical field of machining lathes, in particular to a cutting knife for a machining lathe, which comprises a knife handle and a cutting knife head with a detachable end portion, a knife groove used for installing the cutting knife head is arranged on the side wall of one end of the knife handle, and a locking plate body is arranged on one side wall of the knife handle close to the cutting knife head. A rack structure is arranged on the side, close to the locking plate body, of the cutter body part, limiting teeth matched with the rack structure are arranged at the joint of the locking plate body and the cutter body part, the middle of the locking plate body abuts against and presses one side of the cutting knife through a fastener, the limiting teeth are meshed and engaged with the rack part, the locking plate body can evenly limit stress of the cutter body part, and the cutter body part is prevented from being damaged. The locking plate body is arranged on the cutter body part and connected with the cutter through a single fastener, dismounting and mounting are convenient, the connecting position of the locking plate body and the cutter body part is meshed and engaged through the limiting teeth and the rack part, the horizontal position of the cutting cutter head can be effectively limited through the limiting teeth and the rack part, and high positioning precision is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of processing lathes, and particularly relates to a cutting tool for a processing lathe. Background Technique

[0002] A cutting tool, also known as a turning tool, is a tool with a cutting part used for turning processing. The turning tool is one of the most widely used tools in cutting processing. The working part of the turning tool is the part that generates and processes chips, including the cutting edge, the structure for breaking or curling the chips, the space for discharging or storing the chips, the channel for cutting fluid and other structural elements.

[0003] The combination methods of the cutting part and the shank (i.e., the clamping part) of the turning tool mainly include integral type, welding type, mechanical clamping type and welding-mechanical clamping type. The mechanical clamping type turning tool can avoid the generation of stress and cracks in the cemented carbide blade during high-temperature welding, and the tool shank can be used multiple times. The mechanical clamping type turning tool generally clamps the blade with screws and pressure plates. The turning tools on the market are all inserted into the matching tool slots and fixedly connected through multiple bolts.

[0004] Among the above structures, the clamping structure between the cutting part and the shank is relatively cumbersome in the steps of disassembly and installation. It is necessary to completely disassemble multiple bolts, and during assembly, it is necessary to unify the torques of multiple bolts to prevent inconsistent torques from causing the cutting part to fall off. Therefore, in view of these current situations, there is an urgent need to develop a cutting tool for a processing lathe to meet the actual use requirements. Content of the Utility Model

[0005] The purpose of the utility model is to provide a cutting tool for a processing lathe to solve the above-mentioned defects.

[0006] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0007] A cutting tool for a processing lathe includes a tool shank and a cutting tool head with a detachable end. A tool slot for installing the cutting tool head is provided on the side wall of one end of the tool shank. One end of the cutting tool head is the tool head part, and the end of the cutting tool head away from the tool head part is the tool body part. The tool body part is embedded in the internal of the tool slot. A locking plate body is provided on the side wall of the tool shank close to the cutting tool head. A rack structure is provided on the side of the tool body part close to the locking plate body. A limiting tooth matching the rack structure is provided at the connection between the locking plate body and the tool body part. The middle part of the locking plate body is pressed against the cutting tool side through a fastener, and the limiting tooth meshes and bites with the rack part.

[0008] In the above description, as a further solution, one end of the tool groove is a limiting end, the other end of the tool groove is an open end, the tool body part is inserted into the tool groove along the open end, and the tool body part abuts against the limiting end for limiting, and the tool head part extends to the outside of the open end.

[0009] In the above description, as a further solution, the upper edge and the lower edge of the locking plate body are both provided with a fitting protrusion and a pressing protrusion protruding towards the handle side, the limiting teeth are arranged on the side wall of the pressing protrusion, and a travel groove matching with the pressing protrusion is opened on the side wall of the handle. When the locking plate body abuts against the cutting tool side through a fastener, the fitting protrusion is inlaid with the travel groove.

[0010] In the above description, as a further solution, the depth of the travel groove is H1, the height of the fitting protrusion is H2, and H1 is greater than H2.

[0011] In the above description, as a further solution, a clearance hole is opened in the middle of the locking plate body, the clearance hole penetrates through both sides of the locking plate body, the fastener is composed of a fastening bolt, and the fastening bolt passes through the clearance hole to penetrate the locking plate body and is threadedly connected with the handle.

[0012] In the above description, as a further solution, both the rack part and the limiting teeth are ratchet tooth structures, and the rack part is inclined towards the tool head side, and the inclination direction of the limiting teeth is symmetrical to that of the rack part.

[0013] The beneficial effects produced by the present utility model are as follows:

[0014] For a cutting tool for a processing lathe in the present application, on the one hand, by the locking plate body abutting against the surface of the tool groove, and the locking plate body can evenly limit the force on the tool body part, and is connected with the cutting tool through a single fastener, its disassembly and installation are relatively convenient, and the situation of non-uniform application torque can be effectively avoided;

[0015] On the other hand, the cutting tool head can be firmly inlaid inside the tool groove, and the connection part between the locking plate body and the tool body part is meshed and tightened through the limiting teeth and the rack part, and the horizontal position of the cutting tool head can be effectively limited through the limiting teeth and the rack part, with high positioning accuracy. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of a cutting tool for a processing lathe according to the present utility model;

[0017] Figure 2 is an exploded schematic structural diagram of a cutting tool for a processing lathe according to the present utility model;

[0018] Figure 3 is a schematic structural diagram of the locking plate body described in the present utility model;

[0019] In the figure: 1 - tool shank, 11 - tool groove, 111 - limiting end, 112 - open end, 12 - stroke groove, 2 - cutting tool head, 21 - tool body part, 211 - rack part, 22 - tool head part, 3 - locking plate body, 31 - fitting protrusion, 32 - pressing protrusion, 321 - limiting tooth, 33 - clearance hole, 4 - fastener. Detailed implementation mode

[0020] For the convenience of those skilled in the art, the following further describes the present utility model in conjunction with embodiments and the accompanying drawings. The content mentioned in the implementation mode does not limit the present utility model. The following describes the present utility model in detail with reference to the accompanying drawings.

[0021] Please refer to Figures 1-3 , a cutting tool for a processing lathe implemented specifically includes a tool shank 1 and a cutting tool head 2 with a detachable end. A tool groove 11 for installing the cutting tool head 2 is opened on the side wall of one end of the tool shank 1. One end of the tool groove 11 is a limiting end 111, and the other end of the tool groove 11 is an open end 112. The tool body part 21 is inserted into the tool groove 11 along the open end 112, and the tool body part 21 abuts against the limiting end 111 for limiting, and the tool head part 22 extends to the outside of the open end 112;

[0022] One end of the cutting tool head 2 is the tool head part 22, and the end of the cutting tool head 2 far from the tool head part 22 is the tool body part 21. The tool body part 21 is embedded inside the tool groove 11. A locking plate body 3 is provided on one side wall of the tool shank 1 close to the cutting tool head 2. The locking plate body 3 abuts against the surface of the tool groove 11, and the locking plate body 3 can evenly limit the force on the tool body part 21, and is connected to the cutting tool through a single fastener 4. Its disassembly and installation are relatively convenient, and the situation of inconsistent application torque can be effectively avoided;

[0023] A rack structure is provided on the side of the tool body part 21 close to the locking plate body 3. A limiting tooth 321 matching the rack structure is provided at the connection between the locking plate body 3 and the tool body part 21. The middle part of the locking plate body 3 abuts and presses against the cutting tool side through the fastener 4, and the limiting tooth 321 meshes and bites with the rack part 21, so that the cutting tool head 2 can be firmly embedded inside the tool groove 11, and at the connection between the locking plate body 3 and the tool body part 21, the limiting tooth 321 meshes and bites with the rack part 21, and the horizontal position of the cutting tool head 2 can be effectively limited through the limiting tooth 321 and the rack part 21, with relatively high positioning accuracy.

[0024] Specifically, as Figure 3 shown, a clearance hole 33 is opened in the middle part of the locking plate body 3. The clearance hole 33 penetrates both sides of the locking plate body 3. The fastener 4 is composed of a fastening bolt, and the fastening bolt passes through the clearance hole 33 to be threadedly connected with the tool shank 1 through the locking plate body 3.

[0025] Specifically, as Figure 3 shown, fitting protrusions 31 and pressing protrusions 32 protruding towards the tool handle 1 are provided on the upper edge and the lower edge of the locking plate body 3. The limiting teeth 321 are arranged on the side wall of the pressing protrusion 32. A travel groove 12 matching the above is formed in the side wall of the tool handle 1. When the locking plate body 3 is abutted towards the cutting tool by the fastener 4, the fitting protrusion 31 is inserted into the travel groove 12. The depth of the travel groove 12 is H1, and the height of the fitting protrusion 31 is H2, and H1 is greater than H2.

[0026] Preferably, both the rack portion 21 and the limiting teeth 321 are ratchet tooth structures, and the rack portion 21 is inclined towards the tool head portion 22. The inclination direction of the limiting teeth 321 is symmetrical to that of the rack portion 21. After the limiting teeth 321 and the rack portion 21 are meshed and clamped, the meshing of the two ratchet tooth structures has a stronger clamping strength, which can further prevent the cutting tool head 2 from detaching along the open end 112.

[0027] The above are only preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention is disclosed above in preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, when making some changes or modifications using the above-disclosed technical content into equivalent embodiments of equivalent changes, but as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical concept of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. A cutting tool for a machining lathe, comprising a tool handle and a cutting tool head with a detachable end, characterized in that: A knife groove for installing a cutting tool head is provided on the side wall at one end of the tool handle. One end of the cutting tool head is the tool head portion, and the end of the cutting tool head away from the tool head portion is the tool body portion. The tool body portion is embedded inside the knife groove. A locking plate body is provided on the side wall of the tool handle close to the cutting tool head. A rack structure is provided on the side of the tool body portion close to the locking plate body. A limiting tooth matching the rack structure is provided at the connection between the locking plate body and the tool body portion. The middle of the locking plate body is pressed against the cutting tool side by a fastener, and the limiting tooth meshes with the rack portion.

2. The cutting tool for a processing lathe according to claim 1, characterized in that: One end of the knife groove is the limiting end, and the other end of the knife groove is the open end. The tool body portion is inserted into the knife groove along the open end, and the tool body portion abuts against the limiting end for limiting, and the tool head portion extends to the outside of the open end.

3. The cutting tool for a processing lathe according to claim 1, characterized in that: Fitting protrusions and pressing protrusions protruding towards the tool handle side are provided on both the upper edge and the lower edge of the locking plate body. The limiting tooth is provided on the side wall of the pressing protrusion. A travel groove matching the locking plate body is provided on the side wall of the tool handle. When the locking plate body is pressed against the cutting tool side by a fastener, the fitting protrusion is inserted into the travel groove.

4. The cutting tool for a processing lathe according to claim 3, wherein: The depth of the travel groove is H1, and the height of the fitting protrusion is H2, and H1 is greater than H2.

5. The cutting tool for a processing lathe according to claim 3, characterized in that: A clearance hole is provided in the middle of the locking plate body, and the clearance hole penetrates both sides of the locking plate body. The fastener is composed of a fastening bolt, and the fastening bolt passes through the locking plate body through the clearance hole and is threadedly connected to the tool handle.

6. A cutting tool for a machining lathe according to any one of claims 1-5, characterized in that: Both the rack portion and the limiting tooth are ratchet tooth structures, and the rack portion is inclined towards the tool head portion side, and the inclination direction of the limiting tooth is symmetrical to that of the rack portion.

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