Reducing thread cutter

Abstract

The utility model is applicable to the field of machining cutters, and provides a variable-diameter threaded cutter which comprises a mounting rod, one end of the mounting rod is fixedly connected with a cutter bar used for mounting a blade, a blade groove is arranged on the cutter bar, the blade is mounted in the blade groove through a bolt, a limiting hole is arranged on the cutter bar, and a limiting groove is arranged on the inner side wall of the limiting hole. A pressing head is installed in the limiting hole, a clamping end matched with the limiting groove is arranged on the pressing head, and an abutting end corresponding to the blade in position is installed at the clamping end. And the pressure head is mounted on the cutter bar through a stud. Therefore, the pressing head can provide stable reverse jacking force when the tool is installed, and the tool is effectively prevented from being loosened due to the fact that the tool is subjected to workpiece shaking and the counter-acting force of cutting force in the machining process; the clamping end is matched with the limiting groove, so that the abutting point of the pressing head and the blade can be quickly positioned, the operation time is greatly shortened, and the labor intensity is greatly reduced.

Description

Technical Field

[0001] This utility model applies to the field of machining tools and provides a variable diameter threading tool. Background Technology

[0002] In the field of machining, specialized threading tools are typically used to machine internal threads on workpieces. Internal threads are helical grooves machined onto the inner surface of a workpiece. During machining, the tool, driven by the machine tool spindle, contacts the workpiece through rotation and feed motions, gradually shaping the thread. Common methods for machining internal threads include tapping and turning.

[0003] Currently, internal threading tools are typically mounted on machine tools using special tool holders and tool shanks. The tool mounting process generally relies on a fixing device to connect the tool holder to the machine tool spindle or tool shank, thereby ensuring stable operation or fixation of the tool during machining. To meet the machining requirements of different workpieces, machine tools are usually equipped with various types of tools, which operators need to change according to actual machining requirements.

[0004] During tool installation, a counter-clamping force is required to ensure tool stability. During machining, the tool is subjected to reaction forces from the workpiece and cutting forces, thus necessitating a counter-clamping force to prevent loosening and ensure machining accuracy and stability. However, current market structures providing this clamping force present certain inconveniences when changing tool heads. Especially in scenarios where tool head wear is severe and frequent replacements are necessary, the installation and disassembly processes of existing structures are cumbersome, increasing operation time and labor intensity, and impacting production efficiency. Utility Model Content

[0005] To address the aforementioned deficiencies, the present invention aims to provide a variable diameter threading tool to solve the problems mentioned in the background art. The device includes a mounting rod, one end of which is fixedly connected to a tool holder for mounting a cutting blade. The tool holder has a cutting blade groove, and the cutting blade is mounted in the cutting blade groove by bolts. The tool holder has a limiting hole, and the inner wall of the limiting hole has a limiting groove. A pressure head is installed in the limiting hole, and the pressure head has a snap-fit ​​end that matches the limiting groove. The snap-fit ​​end has an abutment end that corresponds to the position of the cutting blade. The pressure head is mounted on the tool holder by studs.

[0006] Furthermore, the mounting rod is provided with a locking groove.

[0007] Furthermore, a positioning part is installed between the mounting rod and the tool bar.

[0008] Furthermore, the tool holder is provided with a chip groove, and the pressure head and the blade are both installed inside the chip groove.

[0009] Furthermore, the projection of the pressure head and the blade, except for the portion of the blade being used, onto the cross-section of the tool holder does not exceed the cross-sectional area of ​​the tool holder.

[0010] Furthermore, the blade groove is provided with a blade head groove.

[0011] Furthermore, the tool holder is provided with a support body corresponding to the blade.

[0012] This invention provides a stable reverse clamping force during tool installation via a pressure head, effectively preventing the tool from loosening due to workpiece vibration and the reaction force of cutting forces during machining, thus ensuring machining accuracy and stability. Simultaneously, its snap-fit ​​end and limiting groove design eliminates the need for complete disassembly of the pressure head when changing tool heads. This is particularly useful when tool head wear is severe and frequent replacements are necessary. The snap-fit ​​end and limiting groove quickly position the pressure head and tool insert at their contact points, significantly reducing operation time and labor intensity, and meeting the demands for efficient and precise machining. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the tool structure;

[0014] Figure 2 This is a schematic diagram of the tool holder structure;

[0015] Figure 3 for Figure 2 Enlarged view of the A-section structure;

[0016] Figure 4 This is a schematic diagram of the installation structure of the connector and stud.

[0017] In the diagram: 01-blade; 1-mounting rod; 11-locking groove; 2-positioning part; 3-blade bar; 31-chip groove; 32-limiting hole; 321-limiting groove; 33-blade groove; 331-blade head groove; 34-first screw hole; 35-support body; 4-pressure head; 41-insertion part; 42-locking end; 43-abutting end; 5-stud. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] Furthermore, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0022] See Figure 1-4 The purpose of this utility model is to provide a variable diameter thread cutting tool, including a mounting rod 1 that can be installed with a machine tool. One end of the mounting rod 1 is fixedly connected to a tool holder 3, and the end of the tool holder 3 away from the mounting rod 1 is detachably connected to a cutting insert 01 for machining the internal thread of a workpiece. The cutting insert 01 is a 60-degree stainless steel IR (counterclockwise) internal thread lathe cutting insert. The cutting insert 01 has three cutting tips, and only one cutting tip is used to machine the internal thread of the workpiece during operation.

[0023] The tool holder 3 has a blade groove 33 for accommodating the blade 01. The blade 01 is bolted and installed inside the blade groove 33. The tool holder 3 also has a limiting hole 32, and the inner wall of the limiting hole 32 has a vertical limiting groove 321. A pressure head 4 is installed inside the limiting hole 32. The pressure head 4 has a snap-fit ​​end 42 that matches the limiting groove 321. The snap-fit ​​end 42 is fixedly connected to an abutment end 43 corresponding to the position of the blade 01. The snap-fit ​​end 42 can be inserted into the limiting groove 321 and can slide within the limiting groove 321. The pressure head 4 is detachably connected to the tool holder 3 via a stud 5. Specifically, the blade groove 33 has a first screw hole 34 for installing the blade 33. The blade 01 is detachably connected to the blade groove 33 by bolting into the first screw hole 34.

[0024] When installing the blade 01, first place the blade 01 inside the blade groove 33 and secure it to the tool shank 3 using bolts. Then, place the pressure head 4 into the limiting hole 32, with the snap-fit ​​end 42 on the pressure head 4 inserting into the limiting groove 321, thus fixing and positioning the blade 01 with the abutment end 43 on the pressure head 4. When the blade 01 needs to be replaced, the operator can loosen the stud 5 to lift the abutment end 43 of the pressure head 4. At this time, the snap-fit ​​end 42 on the pressure head disengages from the limiting groove 321, allowing the pressure head 4 to be rotated to remove the blade. When reinstalling the blade, the pressure head 4 and blade 01 can be easily and quickly aligned using the snap-fit ​​end 42 and the limiting groove 321, and the pressure head 4 can be tightened again by rotating the stud 5 with a tool.

[0025] Preferably, the mounting rod 1 is provided with a locking groove 11. The locking groove 11 can match the clamping mechanism on the machine tool to fix the tool as a whole.

[0026] Preferably, a positioning part 2 is installed between the mounting rod 1 and the tool holder 3. The positioning part 2 can position the installation depth of the tool on the machine tool.

[0027] Preferably, the tool holder 3 is provided with a chip groove 31, and the pressure head 4 and the blade 01 are both installed inside the chip groove 31; specifically, the orthographic projection of the pressure head 4 and the blade 01, except for the part of the tool head that is in use, onto the cross-section of the tool holder 3 does not exceed the cross-sectional area of ​​the tool holder 3.

[0028] Preferably, the blade groove 33 is provided with a cutting head groove 331. The cutting head groove 331 can accommodate another cutting head of the blade 01 besides the one currently in use, preventing other spare cutting heads from being damaged during use.

[0029] Preferably, the tool holder 3 is provided with a support body 35 corresponding to the blade 01. The support body 35 is located at the bottom of the tool holder 3 in the direction of force applied to the blade 01 during cutting, which can better support the blade 01 and ensure the strength of the blade 01 during cutting.

[0030] In summary, during actual use, the operator first matches the engaging groove 11 on the mounting rod 1 with the clamping mechanism on the machine tool to fix the entire tool on the machine tool. Next, the positioning part 2 between the mounting rod 1 and the tool holder 3 is used to determine the installation depth of the tool on the machine tool. Then, a suitable insert 01 is placed inside the insert groove 33 of the tool holder 3, and a bolt is used to fix the insert 01 to the tool holder 3 through the first threaded hole 34. The pressure head 4 is placed in the limiting hole 32, so that the engaging end 42 on the pressure head 4 is inserted into the limiting groove 321, ensuring that the abutting end 43 on the pressure head 4 is fixed and accurately positions the insert 01, preventing the insert 01 from vibrating or shifting during processing. When it is necessary to replace the insert 01, the operator only needs to loosen the stud 5, causing the abutting end 43 of the pressure head 4 to lift, the engaging end 42 to disengage from the limiting groove 321, and then rotate the pressure head 4 to easily remove the insert 01. After reinstalling the new blade 01, the clamping end 42 and the limiting groove 321 can be used to quickly match the fixed abutment position of the pressure head 4 with the new blade 01, and the pressure head 4 can be tightened again by rotating the stud 5 with a tool to ensure the stable installation of the blade 01.

[0031] Therefore, this device can provide a stable reverse clamping force during tool installation via the pressure head 4, effectively preventing the tool from loosening due to workpiece vibration and the reaction force of cutting force during machining, thus ensuring machining accuracy and stability. Simultaneously, the structural design of its locking end 42 and limiting groove 321 allows for tool head replacement without completely disassembling the pressure head 4. Especially in cases of severe tool head wear requiring frequent replacement, the engagement of the locking end 42 and limiting groove 321 quickly positions the pressure head 4 and the cutting tool 01 at their contact points, significantly reducing operation time and labor intensity, and meeting the demands for efficient and precise machining.

[0032] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A variable diameter thread cutting tool, characterized in that, The device includes a mounting rod (1), one end of which is fixedly connected to a tool holder (3) for mounting a blade (01). The tool holder (3) has a blade groove (33), and the blade (01) is mounted in the blade groove (33) by bolts. The tool holder (3) has a limiting hole (32), and the inner wall of the limiting hole (32) has a limiting groove (321). A pressure head (4) is installed in the limiting hole (32), and the pressure head (4) has a snap-fit ​​end (42) that matches the limiting groove (321). The snap-fit ​​end (42) has an abutment end (43) that corresponds to the position of the blade (01). The pressure head (4) is mounted on the tool holder (3) by studs (5).

2. The variable diameter thread cutting tool according to claim 1, characterized in that, The mounting rod (1) is provided with a locking groove (11).

3. The variable diameter thread cutting tool according to claim 1, characterized in that, A positioning part (2) is installed between the mounting rod (1) and the tool bar (3).

4. The variable diameter thread cutting tool according to claim 1, characterized in that, The cutter bar (3) is provided with a chip groove (31), and the pressure head (4) and the blade (01) are both installed inside the chip groove (31).

5. The variable diameter thread cutting tool according to claim 4, characterized in that, Except for the part of the blade in use, the orthographic projection of the pressure head (4) and the blade (01) onto the cross-section of the blade bar (3) does not exceed the cross-sectional range of the blade bar (3).

6. The variable diameter thread cutting tool according to claim 1, characterized in that, The blade groove (33) is provided with a blade head groove (331).

7. The variable diameter thread cutting tool according to claim 1, characterized in that, The tool holder (3) is provided with a support (35) corresponding to the blade (01).

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