A roughing turning double-end tool bar

Abstract

This utility model discloses a roughing turning double-ended tool holder, relating to the field of machining tool technology. It includes a tool holder body, with a tool head fixedly connected to its front end. A coarse cutting edge and a finish cutting edge are disposed at the end of the tool head furthest from the tool holder body. The vertical distance 'a' from the cutting edge of the coarse cutting edge to the central axis of the tool head is less than the vertical distance 'b' from the cutting edge of the finish cutting edge to the central axis of the tool head. During use, this utility model reduces the number of tool changes, lowers on-site production costs, and reduces efficiency by eliminating the need for two tool holders in the traditional two-tool-holder machining process. It solves the problem of frequent tool holder changes that are necessary for machining the center hole of a workpiece on existing lathes. While two tool holders are typically used—one for roughing and the other for finishing—to ensure the inner diameter of the center hole meets requirements and is relatively smooth, frequent tool holder changes significantly increase the workload for operators and reduce lathe machining efficiency.

Description

Technical Field

[0001] This utility model relates to the field of machining tool technology, and in particular to a roughing double-ended tool holder. Background Technology

[0002] A lathe is a machine tool primarily used to machine rotating workpieces using cutting tools. Drills, reamers, taps, dies, and knurling tools can also be used on a lathe for various machining operations. During machining, the workpiece is machined using a cutting tool, which is typically fixed to the end of a tool holder.

[0003] In existing technology, when machining the center hole of a workpiece, two tool holders are usually used. One tool holder is used for roughing the center hole, and the other tool holder is used for finishing the center hole to make the inner diameter of the center hole meet the requirements and be relatively smooth. Therefore, frequent tool holder changes are required, which brings a lot of workload to the workers and reduces the machining efficiency of the lathe. Therefore, it is necessary to propose a roughing double-ended tool holder to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a roughing double-ended tool holder to solve the problem mentioned in the background art that when existing lathes perform turning of the center hole of a workpiece, they usually use two tool holders, one for roughing and the other for finishing, so that the inner diameter of the center hole meets the requirements and is relatively smooth. However, the frequent tool holder changes bring a lot of workload to the workers and reduce the machining efficiency of the lathe.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a roughing double-headed tool holder, comprising a tool holder body, a tool head fixedly connected to the front end of the tool holder body, a coarse blade and a fine blade disposed at the end of the tool head away from the tool holder body, the vertical distance 'a' from the cutting edge of the coarse blade to the central axis of the tool head is less than the vertical distance 'b' from the cutting edge of the fine blade to the central axis of the tool head, the cutting edge of the coarse blade is located in front of the cutting edge of the fine blade, the cutting edges of both the coarse blade and the fine blade protrude from the side of the tool head, both the coarse blade and the fine blade are inclined at 45° relative to the central axis of the tool head, and the coarse blade and the fine blade are diagonally opposite each other;

[0006] The coarse blade is connected to the cutting head via a first fixing component, and the fine blade is connected to the cutting head via a second fixing component.

[0007] Preferably, the first fixing component includes a first arc surface and a first plane. The first arc surface and the first plane are both disposed on the upper surface of the side of the cutter head. The first plane is connected to the front end of the first arc surface. A protrusion is fixedly disposed at the end of the first plane. A first mounting groove is formed inside the protrusion. A first gasket is attached to the inner wall of the first mounting groove. The coarse blade is engaged inside the first mounting groove, and the coarse blade and the first gasket are attached to each other.

[0008] Preferably, the second fixing component includes a second arc surface and a second plane. Both the second arc surface and the second plane are formed on the lower surface of the side of the cutter head. The second plane is connected to the front end of the second arc surface. A second mounting groove is formed inside the second plane. A second gasket is attached to the inner wall of the second mounting groove. The precision blade is engaged inside the second mounting groove, and the precision blade and the second gasket are attached to each other.

[0009] Preferably, the diameter of the cutter head and the cutter shank body are the same.

[0010] Preferably, pressure heads are rotatably provided on the sides of both the first and second planes, and the pressure heads and the cutting heads are fixedly connected by double-ended studs.

[0011] Preferably, the first plane and the second plane are arranged diagonally opposite each other, and the first arc surface and the second arc surface are arranged diagonally opposite each other.

[0012] Preferably, a positioning pin is fixedly provided inside both the first mounting groove and the second mounting groove, and a through hole adapted to the positioning pin is opened in the middle of the first gasket, the second gasket, the coarse blade and the fine blade.

[0013] Preferably, the tool holder body, the tool head, the first arc surface, the first plane and the protrusion are integrally formed.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] 1. In use, the tool holder body is mounted on a lathe. Compared with the traditional double-ended roughing tool holder, this double-ended roughing tool holder adds an insert on the back. When drilling into the center hole of the workpiece, the coarse insert first performs rough cutting on the inner wall of the center hole, and then the finish insert performs finish cutting on the inner wall of the center hole. This reduces the number of tool changes and lowers on-site production costs. It achieves the processing of a single tool holder instead of two, improving efficiency and reducing costs. This solves the problem that when turning the center hole of a workpiece on a lathe, two tool holders are usually used, one for roughing and the other for finishing, so that the inner diameter of the center hole meets the requirements and is relatively smooth. However, the frequent tool holder changes bring a lot of workload to the workers and reduce the processing efficiency of the lathe.

[0016] 2. Select the diameter of the cutter head and cutter body according to the inner wall diameter of the center hole, while keeping the installation positions of the coarse and fine cutters unchanged. This allows the distances a and b to decrease or increase synchronously, thus catering to different inner wall diameters of the center hole. Furthermore, it eliminates the need to change the cutter type, improving the convenience of the device.

[0017] 3. Taking the first fixing component as an example, the present invention ensures that the end size of the cutter head is gradually reduced by setting the first arc surface, thereby ensuring the connection strength between the first plane and the cutter head, avoiding low strength at the front end of the cutter head. Furthermore, during the rotation of the cutter head, the first arc surface and the second arc surface are diagonally set, allowing the second arc surface to effectively support the torsional force on the first plane, thereby ensuring the stability and strength of the coarse cutting blade. Attached Figure Description

[0018] Figure 1 This is a top-view three-dimensional structural diagram of a roughing double-headed tool holder according to the present invention;

[0019] Figure 2 This is a bottom-view three-dimensional structural diagram of a roughing double-headed tool holder according to the present invention;

[0020] Figure 3 This utility model Figure 1 Enlarged schematic diagram of the structure at point A;

[0021] Figure 4 This utility model Figure 2 Enlarged schematic diagram of the structure at point B;

[0022] Figure 5 This is a schematic diagram of the planar structure of the cutter head of this utility model.

[0023] In the figure: 1. Tool holder body; 2. Tool head; 3. First arc surface; 4. First plane; 5. Protrusion block; 6. Coarse blade; 7. Second arc surface; 8. Second plane; 9. Fine blade; 10. Pressure head. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] This utility model provides, for example Figures 1-5The diagram shows a roughing double-ended tool holder, comprising a tool holder body 1, with a tool head 2 fixedly connected to the front end of the tool holder body 1. A coarse blade 6 and a fine blade 9 are provided at the end of the tool head 2 furthest from the tool holder body 1. The vertical distance a from the cutting edge of the coarse blade 6 to the central axis of the tool head 2 is less than the vertical distance b from the cutting edge of the fine blade 9 to the central axis of the tool head 2. The cutting edge of the coarse blade 6 is located in front of the cutting edge of the fine blade 9. Both the cutting edges of the coarse blade 6 and the fine blade 9 protrude from the side of the tool head 2. Both the coarse blade 6 and the fine blade 9 are inclined at 45° relative to the central axis of the tool head 2, and are diagonally opposite each other.

[0026] In use, the tool holder body 1 is mounted on a lathe. Compared with the traditional double-ended roughing tool holder, this double-ended roughing tool holder adds an insert on the back. When drilling into the center hole of the workpiece, the coarse insert 6 first performs rough cutting on the inner wall of the center hole, and the finish insert 9 then performs finish cutting on the inner wall of the center hole. This reduces the number of tool changes and lowers on-site production costs. It achieves the processing of a single tool holder instead of two, improving efficiency and reducing costs. This solves the problem that when turning the center hole of a workpiece on an existing lathe, two tool holders are usually used, one for roughing and the other for finishing, so that the inner diameter of the center hole meets the requirements and is relatively smooth. However, the frequent tool holder changes bring a lot of workload to the workers and reduce the processing efficiency of the lathe.

[0027] In further implementation, the diameters of the cutter head 2 and the cutter body 1 are the same. The diameters of the cutter head 2 and the cutter body 1 are selected according to the inner wall diameter of the central hole, while the installation positions of the coarse blade 6 and the fine blade 9 remain unchanged. This allows the distances a and b to decrease or increase synchronously, thus catering to different inner wall diameters of the central hole. Furthermore, it eliminates the need to change the blade model, improving the convenience of the device.

[0028] To ensure the stability and strength of the cutting of the coarse blade 6 and the fine blade 9, the coarse blade 6 in this invention is connected to the cutter head 2 through the first fixing component, and the fine blade 9 is connected to the cutter head 2 through the second fixing component.

[0029] Specifically, the first fixing component includes a first arc surface 3 and a first plane 4. Both the first arc surface 3 and the first plane 4 are disposed on the upper surface of the side of the cutter head 2. The front end of the first plane 4 is connected to the front end of the first arc surface 3. A protrusion 5 is fixedly disposed at the end of the first plane 4. A first mounting groove is opened inside the protrusion 5. A first gasket is attached to the inner wall of the first mounting groove. The coarse blade 6 is engaged inside the first mounting groove, and the coarse blade 6 and the first gasket are attached to each other.

[0030] Specifically, the second fixing component includes a second arc surface 7 and a second plane 8. Both the second arc surface 7 and the second plane 8 are opened on the lower surface of the side of the cutter head 2. The front end of the second plane 8 is connected to the second arc surface 7. A second mounting groove is opened inside the second plane 8. A second gasket is attached to the inner wall of the second mounting groove. The precision blade 9 is snapped into the inside of the second mounting groove, and the precision blade 9 and the second gasket are attached to each other.

[0031] Taking the first fixing component as an example, the present invention ensures that the end size of the cutter head 2 is gradually reduced by setting the first arc surface 3, thereby ensuring the connection strength between the first plane 4 and the cutter head 2, avoiding low strength at the front end of the cutter head 2. Furthermore, during the rotation of the cutter head 2, since the first plane 4 and the second plane 8 are diagonally set, and the first arc surface 3 and the second arc surface 7 are diagonally set, the second arc surface 7 can effectively support the torsional force on the first plane 4, thereby ensuring the stability and strength of the cutting of the coarse cutting blade 6.

[0032] In addition, the tool holder body 1, the tool head 2, the first arc surface 3, the first plane 4 and the protrusion block 5 are integrally formed, which further improves the strength of the entire roughing double-ended tool holder and extends its service life.

[0033] Furthermore, pressure heads 10 are rotatably provided on the sides of both the first plane 4 and the second plane 8. The pressure heads 10 and the cutter head 2 are fixedly connected by double-ended studs. The end of the pressure head 10 presses down and fixes the coarse blade 6 and the fine blade 9.

[0034] Furthermore, positioning pins are fixedly provided inside both the first and second mounting slots. Through holes adapted to the positioning pins are opened in the middle of the first shim, the second shim, the coarse blade 6 and the fine blade 9. The positioning pins and through holes further improve the installation accuracy of the coarse blade 6 and the fine blade 9, and facilitate the rapid installation of the coarse blade 6 and the fine blade 9.

[0035] Working principle: Taking the installation of the coarse cutting tool 6 as an example, the first shim is placed inside the first mounting groove, and then the coarse cutting tool 6 is snapped into the first mounting groove, with the coarse cutting tool 6 and the first shim fitting together. At the same time, the positioning pin passes through the through hole of the coarse cutting tool 6 and the first shim. Finally, the end of the pressure head 10 presses and fixes the coarse cutting tool 6, thus completing the installation of the coarse cutting tool 6. Similarly, the installation of the fine cutting tool 9 is completed. The tool holder body 1 is installed on the lathe. When drilling into the center hole of the workpiece, the coarse cutting tool 6 first performs rough cutting on the inner wall of the center hole, and then the fine cutting tool 9 performs fine cutting on the inner wall of the center hole, thereby reducing the number of tool changes and reducing on-site production costs. The original two tool holders are now processed with one tool holder, improving efficiency and reducing costs.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A roughing turning double-ended tool holder, comprising a tool holder body (1), characterized in that: The front end of the blade body (1) is fixedly connected to the blade head (2). The end of the blade head (2) away from the blade body (1) is provided with a coarse blade (6) and a fine blade (9). The vertical distance a from the cutting edge of the coarse blade (6) to the central axis of the blade head (2) is less than the vertical distance b from the cutting edge of the fine blade (9) to the central axis of the blade head (2). The cutting edge of the coarse blade (6) is located in front of the cutting edge of the fine blade (9). The cutting edges of both the coarse blade (6) and the fine blade (9) protrude from the side of the blade head (2). Both the coarse blade (6) and the fine blade (9) are inclined at 45° relative to the central axis of the blade head (2). The coarse blade (6) and the fine blade (9) are diagonally opposite each other. The coarse blade (6) is connected to the cutter head (2) via a first fixing component, and the fine blade (9) is connected to the cutter head (2) via a second fixing component.

2. The roughing turning double-ended tool holder according to claim 1, characterized in that: The first fixing component includes a first arc surface (3) and a first plane (4). The first arc surface (3) and the first plane (4) are both disposed on the upper surface of the side of the cutter head (2). The front end of the first plane (4) is connected to the front end of the first arc surface (3). A protrusion (5) is fixedly disposed at the end of the first plane (4). A first mounting groove is opened inside the protrusion (5). A first gasket is attached to the inner wall of the first mounting groove. The coarse blade (6) is engaged inside the first mounting groove, and the coarse blade (6) and the first gasket are attached to each other.

3. A roughing turning double-ended tool holder according to claim 2, characterized in that: The second fixing component includes a second arc surface (7) and a second plane (8). The second arc surface (7) and the second plane (8) are both opened on the lower surface of the side of the cutter head (2). The second plane (8) is connected to the front end of the second arc surface (7). A second mounting groove is opened inside the second plane (8). A second gasket is attached to the inner wall of the second mounting groove. The precision blade (9) is snapped into the inside of the second mounting groove, and the precision blade (9) and the second gasket are attached to each other.

4. A roughing turning double-ended tool holder according to claim 3, characterized in that: The diameters of the cutter head (2) and the cutter body (1) are the same.

5. A roughing turning double-ended tool holder according to claim 4, characterized in that: The first plane (4) and the second plane (8) are both rotatably provided with pressure heads (10), and the pressure heads (10) and the cutter head (2) are fixedly connected by double-ended studs.

6. A roughing turning double-ended tool holder according to claim 5, characterized in that: The first plane (4) and the second plane (8) are set diagonally opposite each other, and the first arc surface (3) and the second arc surface (7) are set diagonally opposite each other.

7. A roughing turning double-ended tool holder according to claim 3, characterized in that: The first and second mounting slots are both fixedly provided with positioning pins, and the middle of the first gasket, the second gasket, the coarse blade (6) and the fine blade (9) are all provided with through holes that are compatible with the positioning pins.

8. A roughing turning double-ended tool holder according to claim 6, characterized in that: The cutter body (1), cutter head (2), first arc surface (3), first plane (4) and protrusion (5) are integrally formed.

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