Tool setting mechanism

Abstract

The tool setting mechanism comprises a tool apron, a tool arm and a cutting tool bit, the tool apron is of a disc-shaped structure, a plurality of adjusting grooves are formed in the tool apron, the groove directions of the adjusting grooves are of a regular polygon structure, one end of each adjusting groove extends to the side wall of the tool apron to form an extending opening, and the other end of each adjusting groove extends to the side wall of the tool apron. The cutting tool bit is arranged at one end of the tool arm, the end, away from the cutting tool bit, of the tool arm is a main body part, the main body part is movably embedded in the adjusting groove, a rotatable adjusting nut is further arranged in the adjusting groove, and the end of the main body part is in threaded connection with the adjusting nut. According to the tool setting mechanism, the compensation amount between a workpiece coordinate system and a machine tool coordinate system can be obtained by adjusting the rotation amount of the nut or the stroke amount of the tool arm located in the adjusting groove.

Description

Technical Field

[0001] The utility model relates to the technical field of processing lathes, and specifically relates to a tool setting mechanism. Background Art

[0002] The purpose of tool setting in a lathe is to determine the position of the program origin in the machine coordinate system, and the tool setting point should coincide with the tool tip point during tool setting. In numerical control turning, the machining origin of the part should be determined first to establish an accurate machining coordinate system, and at the same time, the influence of different tool sizes on machining should be considered. All these need to be solved through tool setting.

[0003] In existing ordinary lathes, tool setting is generally carried out manually. After the workpiece is clamped on the three-jaw chuck, for trial cutting tool setting, first use the selected tool to turn the outer circle surface of the workpiece once, keep the X-axis dimension unchanged, retract the tool in the Z-axis direction, and press the set programming zero point key. The X and Z coordinate values displayed on the CRT screen are cleared to zero (i.e., X0, Z0); then, stop the spindle and measure the outer diameter D of the workpiece. Then turn the end face of the workpiece once. When the X coordinate value displayed on the CRT is -(D / 2), press the set programming zero point key, and the X and Z coordinate values displayed on the CRT screen are cleared to zero (i.e., X0, Z0), and the system internally completes the function of setting the programming zero point, and the current position of the tool tip (the tool tip point of the turning tool) is at the programming zero point (i.e., the workpiece origin).

[0004] Among them, a corresponding tool setter is also used for measurement. As disclosed in a Chinese utility model with the publication number CN 212329670U, a numerical control lathe tool setter is applicable to economy numerical control lathes and numerical control lathes without an in-machine tool setter; in this structure, by rotating the dial indicator head to make the probe parallel to the spindle, after the position of the probe is adjusted, tighten the adjusting screw to fix the positions of the dial indicator head and the probe, move the tool to make the tool tip contact the probe and squeeze the probe along the direction parallel to the spindle, the pointer on the dial indicator head shows the value, and after manual reading and recording, the tool setting in the X-axis and Z-axis directions can be completed.

[0005] However, the essence is still the tool setting method of an off-machine tool setter, and its accuracy is still affected by the tool setter. Therefore, in view of these current situations, there is an urgent need to develop a tool setting mechanism to meet the actual use requirements. Summary of the Utility Model

[0006] The purpose of the present utility model is to provide a tool setting mechanism that can complete the measurement of tool setting data in the machine without the aid of a tool setter.

[0007] To solve the above technical problems, the present utility model adopts the following technical solutions:

[0008] A tool setting mechanism includes a tool holder, a tool arm, and a cutting tool head. The tool holder is a disc-shaped structure, and there are several adjustment grooves inside the tool holder. The groove directions of the several adjustment grooves form a regular polygon structure. One end of each adjustment groove extends to the side wall of the tool holder as an extended opening. The cutting tool head is arranged at one end of the tool arm. The end of the tool arm away from the cutting tool head is the main body part, and the main body part is movably embedded in the adjustment groove. There is also a rotatable adjustment nut inside the adjustment groove, and the end of the main body part is threadedly connected to the adjustment nut.

[0009] In the above description, as a further solution, there is a rotating rod inside the adjustment groove. The axial direction of the rotating rod is parallel to the groove direction of the adjustment groove, and the center of the adjustment nut is rotatably sleeved outside the rotating rod.

[0010] In the above description, as a further solution, an adjustment threaded hole is opened at the end of the main body part away from the cutting tool head, and the main body part is threadedly connected to the adjustment nut through the adjustment threaded hole.

[0011] In the above description, as a further solution, there is an adjustment scale on the side wall of the end of the adjustment nut away from the tool arm, and there is a scale pointer on one end face of the adjustment groove.

[0012] In the above description, as a further solution, there are adjustment scales on both side faces of the adjustment groove, and there is a scale pointer on the end of the tool arm close to the adjustment nut.

[0013] In the above description, as a further solution, the end of the tool arm close to the cutting tool head is a bent part, and the axis of the bent part is perpendicular to the tangent of the tool holder.

[0014] In the above description, as a further solution, there is a strip-shaped limit groove in the middle of the main body part. There is a limit nut inside the limit groove. One end of the limit nut passes through the limit groove and is threadedly fixed to the tool holder, and the other end of the limit nut is in limit abutment with the top end face of the main body part.

[0015] The beneficial effects produced by the present utility model are as follows:

[0016] For the tool setting mechanism of the present application, since there are several adjustment grooves with a regular polygon structure of groove directions inside the tool holder, the tool arm loaded with the cutting tool head can move along the direction of the adjustment groove. At the same time, the tool setting mechanism can obtain the compensation amount between the workpiece coordinate system and the machine tool coordinate system through the rotation amount of the adjustment nut or the travel amount of the tool arm in the adjustment groove. Description of the Drawings

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the tool setting mechanism described in the present utility model;

[0018] Figure 2Schematic diagram of the structural decomposition of a tool setting mechanism according to the present utility model;

[0019] Figure 3 Schematic diagram of the structure of a tool setting mechanism according to the present utility model from a top view;

[0020] Figure 4 is Figure 3 Schematic cross-sectional structure diagram in the A-A direction in;

[0021] In the figure: 1 - tool holder, 11 - adjustment groove, 12 - extension opening, 13 - rotating rod, 2 - tool arm, 21 - bending part, 22 - main body part, 221 - limiting groove, 222 - adjustment threaded hole, 3 - limiting nut, 4 - adjustment nut, 5 - cutting tool head. Specific embodiments

[0022] For the convenience of understanding by those skilled in the art, the present utility model will be further described below in conjunction with embodiments and the accompanying drawings. The content mentioned in the embodiments does not limit the present utility model. The present utility model will be described in detail below with reference to the accompanying drawings.

[0023] Please refer to Figures 1-4 , a specific tool setting mechanism implemented therein includes a tool holder 1, a tool arm 2, and a cutting tool head 5. The tool holder 1 is of a disc-shaped structure, and a plurality of adjustment grooves 11 are provided inside the tool holder 1. The groove directions of the plurality of adjustment grooves 11 are of a regular polygon structure. One end of each adjustment groove 11 extends to the side wall of the tool holder 1 as an extension opening 12. The cutting tool head 5 is arranged at one end of the tool arm 2. The end of the tool arm 2 far from the cutting tool head 5 is the main body part 22. The main body part 22 is movably embedded in the adjustment groove 11. An adjustable adjustment nut 4 is also provided inside the adjustment groove 11. The end of the main body part 22 is threadedly connected to the adjustment nut 4. The end of the tool arm 2 close to the cutting tool head 5 is a bending part 21. The axis of the bending part 21 is perpendicular to the tangent of the tool holder 1. A strip-shaped limiting groove 221 is provided in the middle of the main body part 22. A limiting nut 3 is provided inside the limiting groove 221. One end of the limiting nut 3 passes through the limiting groove 221 and is threadedly fixed to the tool holder 1. The other end of the limiting nut 3 is in limiting abutment with the top surface of the main body part 22.

[0024] Measurement principle of a tool setting mechanism: Since a plurality of adjustment grooves 11 with a regular polygon structure in the groove direction are provided inside the tool holder 1, the tool arm 2 loaded with the cutting tool head 5 can move along the direction of the adjustment groove 11. At the same time, the tool setting mechanism can obtain the compensation amount between the workpiece coordinate system and the machine tool coordinate system through the rotation amount of the adjustment nut 4 or the travel amount of the tool arm 2 in the adjustment groove 11.

[0025] Specifically, a rotating rod 13 is provided inside the adjusting groove 11. The axial direction of the rotating rod 13 is parallel to the groove direction of the adjusting groove 11. The center of the adjusting nut 4 is rotatably sleeved outside the rotating rod 13. An adjusting threaded hole 222 is formed at one end of the main body portion 22 away from the cutting tool head 5. The main body portion 22 is threadedly connected to the adjusting nut 4 through the adjusting threaded hole 222. Through the threaded connection structure between the adjusting nut 4 and the tool arm 2, when measuring the compensation amount, the tool arm 2 can move along the direction of the adjusting groove 11. When the cutting tool head 5 contacts the workpiece to be machined and can successfully perform cutting on the surface of the workpiece to be machined, the moving amount of the tool arm 2 can be determined as the compensation amount.

[0026] In a preferred solution, an adjusting scale is provided on the side wall of one end of the adjusting nut 4 away from the tool arm 2, and a scale pointer is provided on one end face of the adjusting groove 11. Or, adjusting scales are provided on both side faces of the adjusting groove 11, and a scale pointer is provided on one end of the tool arm 2 close to the adjusting nut 4. Both can reflect the moving amount of the tool arm 2.

[0027] The above is only a preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention. Although the present invention is disclosed above in a preferred embodiment, 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 meaning of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. A tool setting mechanism, characterized in that: include: The knife seat is a disc-shaped structure, and a plurality of adjustment grooves are arranged inside the knife seat, and the grooves of the plurality of adjustment grooves are in a regular polygonal structure, and one end of the adjustment groove extends to the side wall of the knife seat to form an extended opening; A knife arm and a cutting head, wherein the cutting head is arranged at one end of the knife arm, and the end of the knife arm away from the cutting head is a main body, which is movably embedded in an adjusting groove, and a rotatable adjusting nut is also arranged in the adjusting groove, and the end of the main body is threadedly connected to the adjusting nut.

2. A tool setting mechanism according to claim 1, characterized in that: A rotating rod is arranged inside the adjusting groove, the axial direction of the rotating rod is kept parallel to the groove direction of the adjusting groove, and the center of the adjusting nut is rotatably sleeved on the outside of the rotating rod.

3. The tool setting mechanism according to claim 1, characterized in that: An adjusting threaded hole is provided at one end of the main body away from the cutting head, and the main body is threadedly connected with the adjusting nut through the adjusting threaded hole.

4. The tool setting mechanism according to claim 1, characterized in that: An adjustment scale is arranged on a side wall of one end of the adjustment nut away from the knife arm, and a scale pointer is arranged on one end surface of the adjustment slot.

5. The tool setting mechanism according to claim 1, characterized in that: Adjustment scales are arranged on the two side surfaces of the adjustment slot, and a scale pointer is arranged on one end of the knife arm close to the adjustment nut.

6. A tool setting mechanism according to any one of claims 1 to 5, characterized in that: One end of the knife arm close to the cutting head is a bending portion, and the axis of the bending portion and the tangent line of the knife seat are in a mutually perpendicular structure.

7. A tool setting mechanism according to any one of claims 1 to 5, characterized in that: A strip limiting groove is provided in the middle of the main body, a limiting nut is provided inside the limiting groove, one end of the limiting nut passes through the limiting groove and is threadedly fixed to the knife seat, and the other end of the limiting nut is limitedly abutted against the top surface of the main body.

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