Variable-cutting-thickness turning chip breaking servo tool rest

Abstract

A variable-cutting-thickness turning chip breaking servo tool rest comprises a mounting base, a turning tool clamping sleeve and a turning tool mounted in the turning tool clamping sleeve, a mounting groove is formed in the mounting base, the turning tool clamping sleeve is located in the mounting groove, and a rotating disc used for adjusting the cutting angle of the turning tool is arranged between the turning tool clamping sleeve and the mounting base; piezoelectric ceramic drivers abutting against the outer wall of the turning tool clamping sleeve are arranged at the four corners of the mounting groove correspondingly, the two piezoelectric ceramic drivers arranged at the first opposite corners apply equal voltage with the same polarity, and the two piezoelectric ceramic drivers arranged at the second opposite corners apply equal voltage with the polarity opposite to that of the piezoelectric ceramic drivers arranged at the first opposite corners. The turning tool can be driven by the two diagonal piezoelectric ceramic drivers to periodically move, the turning tool is matched with the rotating disc to stably break chips, the surface quality of a machined workpiece cannot be reduced, and the machining quality of the workpiece and the service life of the turning tool are guaranteed.

Description

Technical Field

[0001] The utility model relates to a variable-cut thickness turning and chip-breaking servo tool holder, belonging to the field of machining tools. Background Art

[0002] In metal cutting, turning is one of the most common processing methods. In turning, due to the different toughness of the materials being turned and the different cutting amounts, chip entanglement is easy to occur during the cutting process. Chips entangled on the tool will increase tool wear, and chips entangled on the workpiece will easily scratch the processed surface, causing the surface quality of the processed parts to deteriorate, and even entangled chips are easy to be thrown out and hurt people. In addition, chip entanglement will cause the operator to stop the lathe for manual cleaning, resulting in a decrease in lathe processing efficiency.

[0003] In order to solve the chip entanglement phenomenon during turning, the mainstream method now is to open a chip breaker groove or set a chip breaker block on the front cutting edge of the turning tool, and increase the bending angle of the chips when they flow out from the front cutting edge to break the chips. However, this method cannot ensure chip breaking for materials with high toughness. The China Patent Gazette published a servo tool holder for chip breaking and its cutting method. The patent authorization announcement number is CN111215642B. This invention patent adopts a variable feed method for cutting. By applying high-frequency reciprocating linear motion in the feed direction, the width of the chips changes. When the chip width is zero, the chips fall off, thereby achieving the purpose of chip breaking. Although this method can achieve the effect of chip breaking, applying high-frequency reciprocating linear motion in the feed direction will cause the turning tool to impact the workpiece, resulting in damage to the turning tool and the generation of turning chatter. In addition, when processing conical workpieces, it will cause gnawing, which will reduce the surface quality of the processed workpiece. Utility Model Content

[0004] The utility model aims to overcome the shortcomings and deficiencies of the prior art and to provide a variable-thickness turning chip-breaking servo tool holder.

[0005] A variable-cut thickness turning chip-breaking servo tool holder comprises a mounting seat, a turning tool clamping sleeve and a turning tool mounted inside the turning tool clamping sleeve, the mounting seat being provided with a mounting groove, the turning tool clamping sleeve being located in the mounting groove, and a rotating disk for adjusting the cutting angle of the turning tool being provided between the turning tool clamping sleeve and the mounting seat; piezoelectric ceramic drivers abutting against the outer wall of the turning tool clamping sleeve are respectively provided at the four corners of the mounting groove, two piezoelectric ceramic drivers arranged at the first diagonal corners apply equal voltages with the same polarity, and two piezoelectric ceramic drivers arranged at the second diagonal corners apply equal voltages with opposite polarity to the piezoelectric ceramic drivers at the first diagonal corners, so that the turning tool can move periodically under the drive of the piezoelectric ceramic drivers at the two diagonals, and can stably break chips in cooperation with the rotating disk without reducing the surface quality of the processed workpiece, thereby ensuring the processing quality of the workpiece and the service life of the turning tool.

[0006] Preferably, the tool tip of the turning tool and the rotation center of the rotating disk are located on the same axis. During processing, the turning tool rotates around the axis formed by the tool tip and the center of the rotating disk. At this time, the cutting edge of the turning tool changes, and the thickness of the chips turned changes. When the chip thickness is zero, the chips are broken.

[0007] Furthermore, a pre-tightening bolt corresponding to the piezoelectric ceramic driver is rotatably provided on the installation groove, and the piezoelectric ceramic driver is pre-tightened by abutting against the turning tool mounting sleeve through the pre-tightening bolt. After the piezoelectric ceramic driver is installed, the piezoelectric ceramic driver and the turning tool mounting sleeve are pre-tightened by rotating the pre-tightening bolt.

[0008] Preferably, the turning tool mounting sleeve is provided with an opening, and the turning tool is installed in the opening and fixed by a locking bolt. When a different tool needs to be replaced, it is only necessary to remove the pre-tightening bolt.

[0009] Preferably, the mounting seat includes a connecting plate and a mounting block fixed to the bottom of the connecting plate, and the mounting groove is arranged on the connecting plate.

[0010] Furthermore, the mounting block is T-shaped and can be mounted on a fixed tool holder.

[0011] Furthermore, the turning tool is provided with a turning tool clamping block for clamping the turning tool for cutting.

[0012] The beneficial effects of the utility model are as follows: the turning tool can be driven by two diagonal piezoelectric ceramic drivers to perform periodic motion, and the rotating disk can stably break chips without reducing the surface quality of the processed workpiece, thereby ensuring the processing quality of the workpiece and the service life of the turning tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0014] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0015] Figure 2 This is a schematic diagram of a turning process in which the utility model is installed on a square tool holder;

[0016] Figure 3 It is a front view of the utility model;

[0017] Figure 4 This is a perspective diagram of the turning tool being driven by a piezoelectric ceramic actuator;

[0018] Figure 5 It is a schematic diagram of chip formation in variable thickness turning, the solid line is the chip formation line in normal machining, and the dotted line is the chip formation line in variable thickness machining;

[0019] In the figure, 1. mounting seat; 11. connecting plate; 12. mounting block; 13. mounting groove; 2. piezoelectric ceramic driver; 21. pre-tightening bolt; 3. turning tool mounting sleeve; 31. locking bolt; 4. turning tool; 41. turning tool clamping block; 5. rotating disk; 6. square tool holder; 7. workpiece to be processed. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0021] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0022] The directions and positions mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only for reference to the directions or positions of the drawings. Therefore, the directions and positions used are used to explain and understand the present invention, but not to limit the scope of protection of the present invention.

[0023] like Figure 1-5 As shown, an embodiment of a variable-cut thickness turning chip-breaking servo tool holder of the utility model comprises a mounting seat 1, a turning tool clamping sleeve 3 and a turning tool 4 mounted inside the turning tool clamping sleeve 3, the mounting seat 1 is provided with a mounting groove 13, the turning tool clamping sleeve 3 is located in the mounting groove 13, a rotating disk 5 for adjusting the cutting angle of the turning tool 4 is provided between the turning tool clamping sleeve 3 and the mounting seat 1; piezoelectric ceramic drivers 2 abutting against the outer wall of the turning tool clamping sleeve 3 are respectively provided at the four corners of the mounting groove 13, the two piezoelectric ceramic drivers 2 arranged at the first diagonal angle apply equal voltages with the same polarity, and the two piezoelectric ceramic drivers 2 arranged at the second diagonal angle apply equal voltages with opposite polarity to the piezoelectric ceramic drivers 2 at the first diagonal angle, so that the turning tool 4 can be driven by the piezoelectric ceramic drivers 2 at the two diagonals to perform periodic motion, and can stably break chips without reducing the surface quality of the workpiece in cooperation with the rotating disk 5, thereby ensuring the processing quality of the workpiece and the service life of the turning tool 4.

[0024] The tool tip of the turning tool 4 and the rotation center of the rotating disk 5 are located on the same axis. During processing, the turning tool 4 rotates around the axis formed by the tool tip and the center of the rotating disk 5. At this time, the cutting edge of the turning tool 4 changes, and the thickness of the chips turned changes. When the chip thickness is zero, the chips are broken.

[0025] A pre-tightening bolt 21 corresponding to the piezoelectric ceramic driver 2 is rotatably provided on the mounting groove 13. The piezoelectric ceramic driver 2 is pre-tightened by abutting against the turning tool clamping sleeve 3 through the pre-tightening bolt 21. After the piezoelectric ceramic driver 2 is installed, the piezoelectric ceramic driver 2 is pre-tightened by rotating the pre-tightening bolt 21 to bring the piezoelectric ceramic driver 2 into close contact with the turning tool clamping sleeve 3.

[0026] The turning tool mounting sleeve 3 is provided with an opening, and the turning tool 4 is installed in the opening and fixed by a locking bolt 31. When a different tool needs to be replaced, it is only necessary to remove the pre-tightening bolt 21.

[0027] The mounting seat 1 comprises a connecting plate 11 and a mounting block 12 fixed to the bottom of the connecting plate 11, and the mounting groove 13 is provided on the connecting plate 11. The mounting block 12 is T-shaped and can be mounted on a fixed tool holder.

[0028] The turning tool 4 is provided with a turning tool pressing block for pressing the turning tool 4 for cutting.

[0029] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

[0030] Although the present invention has been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the specific embodiments disclosed. The present invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A variable thickness turning chip breaking servo tool holder, characterized in that: It comprises a mounting seat, a turning tool clamping sleeve and a turning tool installed inside the turning tool clamping sleeve, wherein the mounting seat is provided with a mounting groove, the turning tool clamping sleeve is located in the mounting groove, and a rotating disk for adjusting the cutting angle of the turning tool is provided between the turning tool clamping sleeve and the mounting seat; The four corners of the mounting groove are respectively provided with piezoelectric ceramic drivers that abut against the outer wall of the turning tool clamping sleeve. The two piezoelectric ceramic drivers arranged at the first diagonal apply equal voltages with the same polarity, and the two piezoelectric ceramic drivers arranged at the second diagonal apply equal voltages with opposite polarity to the piezoelectric ceramic drivers at the first diagonal.

2. The variable thickness turning chip breaking servo tool holder according to claim 1, characterized in that: The tool tip of the turning tool and the rotation center of the rotating disk are located on the same axis.

3. The variable thickness turning chip breaking servo tool holder according to claim 1, characterized in that: A pre-tightening bolt corresponding to the piezoelectric ceramic driver is rotatably arranged on the installation groove, and the piezoelectric ceramic driver is pre-tightened by abutting against the tool clamping sleeve through the pre-tightening bolt.

4. The variable thickness turning chip breaking servo tool holder according to claim 1 or 3, characterized in that: The turning tool clamping sleeve is provided with an opening, and the turning tool is installed in the opening and fixed by a locking bolt.

5. The variable thickness turning chip breaking servo tool holder according to claim 1, characterized in that: The mounting seat comprises a connecting plate and a mounting block fixed on the bottom of the connecting plate, and the mounting groove is arranged on the connecting plate.

6. The variable thickness turning chip breaking servo tool holder according to claim 5, characterized in that: The mounting block is T-shaped.

7. The variable thickness turning chip breaking servo tool holder according to claim 1, characterized in that: A turning tool pressing block is provided on the turning tool.

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