CN218926478U

CN218926478U - Composite cutter for processing screw thread and screw thread tool withdrawal groove

Info

Publication number: CN218926478U
Application number: CN202120638679.2U
Authority: CN
Inventors: 赵正强; 李府; 赵正国
Original assignee: Sichuan Daoqin Cutting Tools Co ltd
Current assignee: Sichuan Daoqin Cutting Tools Co ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2023-04-28
Anticipated expiration: 2031-03-30

Abstract

The utility model discloses a composite cutter for machining threads and thread relief grooves, relates to the field of machining cutters, and provides a composite cutter capable of machining threads and thread relief grooves. The composite cutter for machining the thread and the thread withdrawal groove comprises a cutter bar, a thread machining blade and a groove machining blade, wherein the front part of the cutter bar is provided with a workpiece passing groove, and the thread machining blade and the groove machining blade are respectively positioned on two sides of the workpiece passing groove and are connected with the cutter bar. When the thread is turned, the workpiece passes through the groove from the workpiece, the cutter is moved to enable the groove processing blade to be close to the workpiece, the cutter withdrawal groove can be processed, and then the cutter is moved to enable the thread processing blade to be close to the workpiece, and the thread can be processed. When the tool retracting groove and the thread are machined, only the machine tool is operated or the compound tool is moved by a set program, and the tool does not need to be switched. The utility model is mainly suitable for the thread turning processing of shaft parts with smaller diameters.

Description

Composite cutter for processing screw thread and screw thread tool withdrawal groove

Technical Field

The utility model relates to the field of machining tools, in particular to a composite tool for machining threads and thread relief grooves.

Background

The threaded shaft type part shown in fig. 1 is widely used in various machines, such as a common hydraulic cylinder piston rod. The shaft parts are generally machined by a lathe, and the root of the turning thread is provided with a tool withdrawal groove due to the process requirement.

At present, two types of cutters, namely a thread machining cutter and a groove machining cutter, are required to be adopted for machining the thread and the relief groove, and the relief groove is machined by the groove machining cutter firstly and then the thread is machined by the thread machining cutter. This machining method is not simple because of the need to switch tools.

Many patents, such as ZL201120238810.2 and ZL202020105989.3, have been searched for groove cutting tools, and many patents, such as ZL202020700083.6, ZL201922184325.0 and ZL201920719176.0, have disclosed threading tools, but no tools are searched for which both the thread and the thread relief groove can be machined.

Disclosure of Invention

The utility model aims to solve the technical problems that: a composite tool is provided in which both threads and thread relief grooves are machined.

The technical scheme adopted for solving the problems is as follows: the composite cutter for machining the thread and the thread withdrawal groove comprises a cutter bar, a thread machining blade and a groove machining blade, wherein the front part of the cutter bar is provided with a workpiece passing groove, and the thread machining blade and the groove machining blade are respectively positioned on two sides of the workpiece passing groove and are connected with the cutter bar.

Further is: the edge of the groove working blade is oriented opposite to the edge of the thread working blade.

Further is: the cutting edge of the groove processing blade is the same as the cutting edge of the thread processing blade.

Further is: the thread machining blade is positioned behind the workpiece passing groove, and the groove machining blade is positioned in front of the workpiece passing groove.

Further is: the workpiece passes through the groove and extends downwards from the upper surface of the cutter bar, the cutting edge of the groove processing blade faces upwards, and the cutting edge of the thread processing blade faces downwards.

The beneficial effects of the utility model are as follows: as shown in fig. 4 and 5, during thread turning, a workpiece passes through a groove from the workpiece, a tool is moved to bring a groove processing blade close to the workpiece to process a relief groove, and then the tool is moved to bring the thread processing blade close to the workpiece to process threads. When the tool retracting groove and the thread are machined, only the machine tool is required to be operated or the compound tool is required to be moved by a set program, the tool does not need to be switched, the machining of the thread and the tool retracting groove is simplified, and the machining efficiency is improved.

Drawings

FIG. 1 is a block diagram of a workpiece for a composite tool for thread and thread relief machining;

FIG. 2 is a perspective view of a composite tool for thread and thread relief machining;

FIG. 3 is a front view of a composite tool for thread and thread relief machining;

fig. 4 is a state diagram of a thread and a thread relief groove for a compound tool;

FIG. 5 is a view showing a state of a thread being formed by a composite tool for thread and thread relief machining;

marked in the figure as: the tool bar 1, the workpiece passing groove 11, the thread processing blade 2, the groove processing blade 3, the workpiece 4, the thread 41 and the tool withdrawal groove 42.

Detailed Description

The utility model is further described below with reference to the drawings and the detailed description.

As shown in fig. 2 and 3, the composite tool for thread and thread relief groove machining includes a tool bar 1, a thread machining blade 2 and a groove machining blade 3, the front portion of the tool bar 1 having a workpiece passing groove 11, the thread machining blade 2 and the groove machining blade 3 being located on both sides of the workpiece passing groove 11 and both being connected to the tool bar 1.

As shown in fig. 4 and 5, during thread turning, the workpiece 4 passes through the workpiece passing groove 11, the tool is moved to bring the groove processing blade 3 close to the workpiece 4, and then the tool is moved to bring the thread processing blade 3 close to the workpiece 4, and the thread 41 is processed. When the tool retracting groove 42 and the thread 41 are machined, only the machine tool is required to be operated or a program is required to be set to move the compound tool, and the tool is not required to be switched, so that the machining of the thread 41 and the tool retracting groove 42 is simplified, and the machining efficiency is improved.

Further, it is preferable that the edge orientation of the groove working blade 3 is opposite to the edge orientation of the thread working blade 2. As shown in fig. 4 and 5, the groove processing blade 3 and the thread processing blade 2 are located on both sides of the workpiece 4, and the workpiece 4 is rotated clockwise when the relief groove 42 and the thread 41 are processed. Whereas if the edge orientation of the slot-machining blade 3 is the same as the edge orientation of the thread-machining blade 2, the direction of rotation of the workpiece 4 when machining the relief slot 42 and the thread 41 needs to be different. Therefore, the arrangement is also beneficial to simplifying processing and improving processing efficiency.

Further, it is preferable that the cutting edge of the groove processing blade 3 is the same height as the cutting edge of the thread processing blade 2. In turning, the tool is generally mounted horizontally, so that the present arrangement is specifically such that the cutting edge of the groove machining blade 3 is at the same height as the cutting edge of the thread machining blade 2 when the tool is mounted horizontally. The cutting edges of the groove cutting blade 3 and the thread cutting blade 2 should be flush with the center of the workpiece 4 at the time of machining. The height of the cutting edge of the grooving blade 3 is the same as that of the threading blade 2, and the tool is moved horizontally when the relief groove 42 and the thread 41 are machined, and the height does not need to be adjusted.

When the cutter is used, the rear part of the cutter bar 1 is clamped on a machine tool, and when the cutter is processed, the vibration amplitude of the point at the position where the cutter is away from the clamping point is larger. The relief groove 42 is required to have low machining accuracy, and therefore, it is preferable that the threading insert 2 is located behind the workpiece passing groove 11 and the groove machining insert 3 is located in front of the workpiece passing groove 11. So that the thread processing blade 2 is close to the clamping point, which is beneficial to ensuring the processing precision of the thread 41; the processing precision requirement of the tool retracting groove 42 is low, so that the groove processing blade 3 is far away from the clamping point without obvious adverse effect.

Specifically, the workpiece preferably extends downward from the upper surface of the shank 1 through the slot 11, with the edge of the slot-making blade 3 facing upward and the edge of the thread-making blade 2 facing downward. The threading blade 2 and the grooving blade 3 can be existing blades, such as a grooving blade disclosed in ZL202021002776.4 and a threading blade disclosed in ZL 201220247398.5, preferably a vertical triangular blade is selected and installed on one side of the cutter bar 1.

The utility model is mainly suitable for the thread turning processing of shaft parts with smaller diameters.

Claims

1. The compound cutter for processing the screw thread and the screw thread withdrawal groove is characterized in that: the novel thread cutting tool comprises a tool bar (1), a thread machining blade (2) and a groove machining blade (3), wherein a workpiece passing groove (11) is formed in the front portion of the tool bar (1), and the thread machining blade (2) and the groove machining blade (3) are respectively located on two sides of the workpiece passing groove (11) and are connected with the tool bar (1).

2. The composite tool for machining a thread and a thread relief groove according to claim 1, wherein: the edge orientation of the groove processing blade (3) is opposite to the edge orientation of the thread processing blade (2).

3. The composite tool for machining a thread and a thread relief groove according to claim 2, wherein: the blade height of the groove processing blade (3) is the same as the blade height of the thread processing blade (2).

4. A composite tool for thread and thread relief machining according to claim 3, wherein: the thread processing blade (2) is positioned behind the workpiece passing groove (11), and the groove processing blade (3) is positioned in front of the workpiece passing groove (11).

5. The composite tool for machining a thread and a thread relief groove according to claim 4, wherein: the workpiece passes through the groove (11) and extends downwards from the upper surface of the cutter bar (1), the cutting edge of the groove processing blade (3) faces upwards, and the cutting edge of the thread processing blade (2) faces downwards.