A turning tool self-rotating device

Abstract

The invention discloses a turning tool self-rotation device, comprising a tool holder, a vertical shaft and a turning tool, wherein the vertical shaft is arranged on the tool holder, and the turning tool is rotatably mounted on the vertical shaft; the turning tool is a columnar structure, and at least one end of the turning tool is a circular end face, and a circular ring-shaped blade is arranged around the circular end face, and the blade extends along the axis direction of the turning tool. Since a cylindrical tool is adopted and is mounted on a machine tool and can rotate, especially as a turning tool, the annular blade can rotate automatically during operation, and the cutting point of the blade can be changed uninterruptedly, so that each annular segment of the blade can participate in cutting, reducing the frequency of tool replacement, and it can significantly improve the tool durability, increase the service life of the tool, and improve the processing accuracy and processing efficiency.

Description

Technical Field

[0001] The invention relates to a turning tool, in particular to a turning tool self-rotating device. Background Art

[0002] In metal cutting, turning is a very common processing method. Traditional turning tools are fixed on the tool body. During the turning process, the tool and the surface being processed repeatedly rub against each other to generate high temperature, which aggravates the wear of the tool. The tool must be replaced after a period of processing, which affects the tool life and processing efficiency. Existing turning tools come in various shapes and are fixed on the tool body by means of pressure plates. During processing, a fixed cutting edge is used to process the workpiece, which causes the cutting edge to wear quickly, requires a high replacement frequency, and reduces processing efficiency.

[0003] The existing solution to the above problem is to use an indexable turning tool. For example, the State Intellectual Property Office published a patent document with a publication number of 202951881U on May 29, 2013. A lathe with switchable tools, characterized in that it includes: a rotating chuck, which is connected to a first rotating drive mechanism and driven to rotate by the first rotating drive mechanism; a tool turntable, on which multiple tools are detachably connected and radially distributed along the radial direction of the tool turntable, and the center position of the tool turntable is fixedly connected to a fixed shaft; a second rotating drive mechanism, which is connected to the fixed shaft, drives the tool turntable to rotate a certain angle so that any tool on the tool turntable is in a usable state; a feeding mechanism, which is connected to the tool turntable, drives the tool turntable to move in the axial direction of the rotating chuck; a horizontal displacement power mechanism, which is connected to the tool turntable, drives the tool turntable to move along the axis of the rotating chuck. An indexable turning tool is a turning tool that clamps a pre-processed polygonal turning blade with several cutting edges on a tool bar or a tool holder by a mechanical clamping method. Although this type of turning tool has multiple cutting edges available for use, each part involved in cutting still has only one cutting edge. When the cutting edge is worn, it needs to be manually replaced many times, which affects the processing efficiency. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings, an object of the present invention is to provide a self-rotating turning tool device which can reduce the tool replacement frequency and improve the processing efficiency.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A turning tool self-rotation device, characterized in that it includes a tool holder, a vertical shaft and a turning tool, the vertical shaft is arranged on the tool holder, and the turning tool is rotatably mounted on the vertical shaft; the turning tool is a columnar structure, at least one end of the turning tool is a circular end face, and a circular ring-shaped blade is arranged around the circular end face, and the blade extends along the axial direction of the turning tool.

[0007] Furthermore, the vertical axis is a fixed vertical axis, and the turning tool is mounted on the fixed vertical axis via a bearing.

[0008] Furthermore, a through hole is opened in the center of the end surface of the turning tool along the axial direction.

[0009] Furthermore, a screw hole is provided on the surface of the tool seat, and the fixed vertical axis is adopted by a bolt. The upper end surface of the turning tool is a concave arc groove. Two bearings are provided, one is a thrust ball bearing, and the other is a thrust bearing. The thrust ball bearing is placed on the tool seat, and the lower end of the turning tool is supported on the rolling ball of the thrust ball bearing. The outer ring of the thrust bearing is tightly pressed on the arc groove of the turning tool, and the inner ring of the thrust bearing does not contact the arc groove. The lower end of the bolt passes through the thrust bearing, the through hole of the turning tool, and the thrust ball bearing and is threadedly connected with the screw hole in sequence. The bolt head at the upper end of the bolt is tightly pressed on the inner ring of the thrust bearing, and there is a clearance fit between the bolt and the through hole of the turning tool.

[0010] Furthermore, a notch is provided on the tool holder, the side wall of the notch is arc-shaped, the bottom surface is a plane, the screw hole is arranged on the bottom surface, and the depth of the notch is greater than the thickness of the turning tool.

[0011] Furthermore, the vertical axis is a rotatable vertical axis.

[0012] Furthermore, the cross-sectional width of the blade gradually changes from narrow to wide.

[0013] The beneficial effects of the present invention are:

[0014] Because a cylindrical tool is used and is installed on a machine tool and can rotate, especially as a turning tool, the annular blade can rotate by itself during operation, and the cutting point of the blade can be changed continuously, so that each annular segment of the blade can participate in the cutting, reducing the frequency of tool replacement. It can significantly improve the durability of the tool, increase the service life of the tool, and improve processing accuracy and processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described with the aid of the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other accompanying drawings according to the following drawings without creative work:

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the installation of embodiment 1 of the present patent;

[0018] Figure 3 for Figure 2 The cross-sectional view along line AA is shown;

[0019] Figure 4 for Figure 2 Exploded view shown;

[0020] Figure 5 for Figure 4 The structural schematic diagram of the thrust bearing shown;

[0021] Figure 6 It is a schematic diagram of the structure of the knife pad;

[0022] Figure 7 for Figure 6 The cross-sectional view along the CC line is shown;

[0023] Figure 8 This is the installation diagram of Example 2 of this patent.

[0024] In the figure: 1, turning tool; 2, blade; 3, through hole; 4, tool holder; 5, notch; 6, side wall; 7, bottom surface; 8, screw hole; 9, bolt; 10, arc groove; 11, thrust ball bearing; 12, thrust bearing; 13, rolling ball; 14, outer ring; 15, inner ring; 16, bolt head; 17, rotatable vertical axis; 18, tool pad; 19, annular groove; 20, rolling ball; 21, mounting hole. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0026] like Figure 1 As shown, a turning tool, the turning tool 1 is a cylindrical structure, and a circular blade 2 is arranged around one end of the turning tool 1, and the blade 2 extends along the axis direction of the turning tool 1, and the cross-sectional width of the blade 2 gradually changes from narrow to wide, and the blade 2 can be set to different front and rear angles, and a through hole 3 is opened in the center of the end face of the turning tool 1 along the axis direction. The through hole 3 is a mounting hole. The upper end face of the turning tool 1 is a concave arc groove 10.

[0027] Among them, the rake angle is generally between -5° and 25°, and the back angle is generally 6 to 12 degrees. The size of the rake angle mainly solves the contradiction between the firmness and sharpness of the cutter head. Therefore, the rake angle should be selected first according to the hardness of the processed material. The hardness of the processed material is high, and the rake angle should be small, otherwise it should be large. Secondly, the size of the rake angle should be considered according to the processing properties. The rake angle should be small during rough processing and large during fine processing. It is more appropriate. The rake angle is generally selected between -5° and 25°.

[0028] The size of the back angle must first be considered according to the processing properties. During fine processing, the back angle takes a large value, and during rough processing, the back angle takes a small value. Secondly, the hardness of the processing material must be considered. If the hardness of the processing material is high, the back angle takes a small value to enhance the firmness of the tool head; otherwise, the back angle takes a large value. The back angle cannot be zero or negative. The optimal back angle is generally selected between 6° and 12°.

[0029] The turning tool 1 and the blade 2 are integrally formed. Specifically, a blade 2 is machined on the end face of the cylindrical turning tool 1 .

[0030] Example 1: Figure 2 , 3 As shown in Figures 4 and 5, the turning tool 1 of the present invention is installed on the machine tool and can rotate. The tool holder 4 is provided with a notch 5, and the side wall surface 6 of the notch 5 is in an arc shape, so as to match the tool with a cylindrical structure. The bottom surface 7 of the notch 5 is a plane, and a screw hole 8 is provided on the bottom surface 7. The depth of the notch 5 is greater than the thickness of the turning tool 1. The turning tool 1 is installed at the notch 5. The notch can act as a protective cover for the turning tool 1, so that the staff can avoid contact with the tool during operation, so as to improve the safety of operation.

[0031] The tool holder 4 is provided with a fixed vertical shaft, and the tool is mounted on the fixed vertical shaft through a bearing. The specific installation of the tool is as follows: the fixed vertical shaft adopts a bolt 9, and two bearings are provided, one is a thrust ball bearing 11, and the other is a thrust bearing 12. The thrust ball bearing 11 is placed at the notch 5 of the tool holder 4, and the lower end of the turning tool 1 is supported on the rolling ball 13 of the thrust ball bearing 11. The outer ring 14 of the thrust bearing 12 is pressed tightly on the arc groove 10 of the turning tool 1. Since the center of the arc groove 10 is the lowest and the edge is high, this design can make the thrust shaft The outer ring 14 of the bearing 12 contacts the arc groove 10, so that the inner ring 15 of the thrust bearing 12 does not contact the arc groove 10. The lower end of the bolt 9 passes through the thrust bearing 12, the turning tool 1, and the thrust ball bearing 11 in sequence and is threadedly connected to the screw hole 8. The bolt head 16 at the upper end of the bolt 9 is pressed tightly on the inner ring 15 of the thrust bearing 12. There is a gap between the bolt 9 and the through hole 3 of the tool. The inner ring 15 of the thrust bearing 12 does not contact the arc groove 10, ensuring that the bolt 9 does not rotate with the tool. The bolt 9 cooperates with the thrust bearing 12 and the thrust ball bearing 11 to fix the turning tool 1, so that the tool can only rotate but cannot move axially. The outer ring 14 of the thrust bearing 12 is pressed tightly on the arc groove 10 of the turning tool 1. The pressure of the outer ring 14 of the thrust bearing 12 on the turning tool 1 can prevent the turning tool 1 from shaking during cutting and ensure processing accuracy.

[0032] Embodiment 1 of the present invention is the best solution. When the turning tool is performing cutting work, since the thrust ball bearing 11 and the thrust bearing 12 can slide relative to the bolt 9, the cutting load of the tool is applied to the tool holder 4 through the thrust ball bearing 11, and the fixed vertical axis using the bolt 9 does not bear the cutting load. Therefore, this solution can fully meet the cutting load requirement.

[0033] In addition, it should be noted that the thrust ball bearing 11 plays the role of a knife pad, so other technical solutions equivalent to the thrust ball bearing 11 can also be used, such as Figure 6 , 7 As shown, the thrust ball bearing 11 is replaced by a knife pad 18, and a mounting hole 21 is provided at the center of the knife pad 18, and the mounting hole 21 is used for the bolt 9 to pass through. An annular groove 19 is opened on the upper surface of the knife pad 18, and a plurality of rolling balls 20 are distributed in the annular groove 19, and the rolling balls 20 are exposed from the annular groove 19. The lower end surface of the turning tool 1 can contact the rolling balls 20 to ensure that the tool is supported on the rolling balls. When the tool rotates, the rolling balls in contact with the tool can roll along the annular groove to reduce the friction between the lower end surface of the tool and the knife pad. The structure of the above-mentioned knife pad 18 is substantially the same as that of the thrust ball bearing.

[0034] Example 2: Figure 8 As shown, the turning tool 1 of the present invention is mounted on a machine tool and can rotate. The turning tool is mounted on a tool holder 4 of the lathe. A rotatable vertical shaft 17 is provided on the tool holder 4, and the tool of the present invention is fixedly mounted on the rotatable vertical shaft 17. The tool cutting bearing capacity of the present embodiment needs to be carried by the rotatable vertical shaft 17.

[0035] In the above two embodiments for lathes, the rotation of the tool is passive, not driven by a motor, but follows the rotation of the workpiece. During turning, the workpiece is mounted between the tool holder and the center at the end of the output shaft of the lathe, and the workpiece rotates. When the tool of this patent turns the workpiece, the tool can follow the workpiece under the action of the workpiece.

[0036] It is worth mentioning that, in addition to the above two embodiments, the tool of this patent can also be installed on a milling machine and used as a milling cutter or installed on a planing machine and used as a planing cutter. And the tool can also be rotated by a motor drive. When in use, the tool of this patent can be installed on the rotating shaft of a milling machine or a planing machine, the rotating shaft is driven by a motor, and the workpiece is fixed and does not rotate, so as to perform milling and planing processing on the workpiece. Since the tool of this patent is not commonly used on a milling machine or a planing machine, it will not be described in detail.

[0037] The above description is only a preferred implementation mode of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. It should be pointed out that for ordinary technicians in this technical field, modifications or equivalent substitutions of the technical solution of the present invention do not depart from the protection scope of the technical solution of the present invention.

Claims

1. A turning tool self-rotation device, characterized in that: The utility model comprises a tool holder, a vertical shaft and a turning tool, wherein the vertical shaft is arranged on the tool holder, and the turning tool is rotatably mounted on the vertical shaft; the turning tool is a columnar structure, and at least one end of the turning tool is a circular end face, and a circular blade is arranged around the circular end face, and the blade extends along the axis direction of the turning tool; the vertical shaft is a fixed vertical shaft, and the turning tool is mounted on the fixed vertical shaft through a bearing; a screw hole is arranged on the surface of the tool holder, and the fixed vertical shaft adopts a bolt, and the upper end face of the turning tool is a concave arc groove, and the bearing There are two, one is a thrust ball bearing and the other is a thrust bearing. The thrust ball bearing is placed on the tool holder, and the lower end of the turning tool is supported on the rolling ball of the thrust ball bearing. The outer ring of the thrust bearing is pressed tightly on the arc groove of the turning tool, and the inner ring of the thrust bearing does not contact the arc groove. The lower end of the bolt passes through the thrust bearing, the through hole of the turning tool, the thrust ball bearing and the screw hole in sequence, and is threadedly connected. The bolt head at the upper end of the bolt is pressed tightly on the inner ring of the thrust bearing, and there is a clearance fit between the bolt and the through hole of the turning tool.

2. The turning tool self-rotation device according to claim 1, characterized in that: A through hole is opened at the center of the end surface of the turning tool along the axis direction.

3. The turning tool self-rotation device according to claim 1, characterized in that: The tool holder is provided with a notch, the side wall of the notch is in an arc shape, the bottom surface is a plane, the screw hole is arranged on the bottom surface, and the depth of the notch is greater than the thickness of the turning tool.

4. The turning tool self-rotation device according to claim 1, characterized in that: The vertical axis is a rotatable vertical axis.

5. The turning tool self-rotation device according to claim 1, characterized in that: The cross-sectional width of the blade gradually changes from narrow to wide.

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