Clamping tool and wandering star wheel forming carving machine

Abstract

The invention relates to the technical field of wandering star wheel machining equipment, in particular to a clamping tool and a wandering star wheel forming engraving machine, comprising: a positioning disc, a mounting column vertically connected to the positioning disc, the mounting column being capable of passing through a center hole in a wandering star wheel; the supporting strips are connected with the mounting column, the top walls of the supporting strips form a supporting plane, and a receding notch is formed between every two adjacent supporting strips; the mounting ring is coaxially arranged on the mounting column in a sleeving mode, a plurality of pressure applying strips are connected to the mounting ring, and the bottom walls of the pressure applying strips form a pressure applying plane; the locking nut is in threaded connection with the mounting column, and the locking nut is located on the side, away from the supporting strip, of the mounting ring; the polishing device has the beneficial effects that the supporting strips and the pressing strips are matched to abut against and fix the polishing star wheel, machining of the clamping cavity of the polishing star wheel is facilitated, the influence of adhesive tape fixing on the machining quality of the polishing star wheel is avoided, subsequent adhesive tape cleaning is not needed, and the machining efficiency of the polishing star wheel is improved.

Description

Technical Field

[0001] The present application relates to the technical field of planetary gear processing equipment, and in particular to a clamping tool and a planetary gear forming engraving machine. Background Art

[0002] A planetary wheel is a fixture used in various flat polishing processes such as glass, lenses, silicon wafers, hard drives, etc. It is also called a polishing jig or polishing pad. Depending on the material, the planetary wheel can be divided into many types, such as blue steel planetary wheels, stainless steel planetary wheels, epoxy resin planetary wheels, and fiberglass planetary wheels. Currently, the main material of the planetary wheel is FR-4 fiberglass board, which is wear-resistant and easy to process. The processing procedure is simple and does not damage the polished workpiece. It also has stable electrical insulation performance, good flatness, a smooth surface, no pits, and a standard thickness tolerance. It is suitable for products with high-performance electronic insulation requirements.

[0003] In the prior art, when a planetary wheel is made of fiberglass board, the fiberglass board is usually bonded and fixed to a base plate with the help of adhesive strips, and then the fiberglass board is further processed by a CNC machine tool. Since the planetary wheel is mainly used as a fixture for precision polishing and grinding of glass, lenses, etc., the surface flatness of the planetary wheel is very important. However, when the adhesive strips are used for bonding and fixing, the adhesive strips themselves may have ups and downs, which affects the processing quality of the planetary wheel. After the processing is completed, an additional process is required to remove the adhesive strips adhered to the bottom wall of the planetary wheel, which is cumbersome and time-consuming, affecting the processing efficiency of the planetary wheel. Summary of the invention

[0004] In order to avoid the influence of rubber strip fixation on the processing quality of the planetary wheel and improve the processing efficiency of the planetary wheel, the present application provides a clamping tool and a planetary wheel forming engraving machine.

[0005] In a first aspect, the present application provides a clamping tool.

[0006] The present application provides a clamping tool that adopts the following technical solution: A clamping tool, comprising: A positioning plate, to which a mounting post is vertically connected, and the mounting post can pass through a center hole on the planetary wheel; A plurality of support bars, wherein the support bars are connected to the mounting posts, the top walls of the plurality of support bars form a support plane, and a clearance gap is formed between two adjacent support bars; A mounting ring, wherein the mounting ring is coaxially sleeved on the mounting column, and a plurality of pressure strips are connected to the mounting ring, and the bottom walls of the plurality of pressure strips form a pressure plane parallel to the supporting plane; A locking nut is threadedly connected to the mounting column, and the locking nut is located on a side of the mounting ring away from the support bar.

[0007] By adopting the above technical scheme, the positioning plate and the workbench of the planetary wheel forming engraving machine are first fixed by a vise or bolts, and the mounting column is vertically arranged at this time, and then the planetary wheel that has been preliminarily processed is installed on the positioning plate, and the mounting column passes through the center hole of the planetary wheel, and the bottom wall of the planetary wheel is in contact with the supporting plane formed by the support strip, and then force is applied to the mounting ring, and the mounting ring drives the pressure strip to move toward the planetary wheel, and then the locking nut is screwed until the pressure strip and the support strip clamp and fix the planetary wheel, wherein, before completely clamping and fixing, it is necessary to adjust the relative position of the support strip and the pressure strip according to the opening position of the clamping cavity on the planetary wheel; the designed clamping tooling can fix the mounting column through the positioning plate, and the mounting column can be used as the installation base of the support strip and limit the movement range of the mounting ring, and the planetary wheel can be tightly fixed by the cooperation of the support strip and the pressure strip, so as to facilitate the processing of the clamping cavity of the planetary wheel, avoid the influence of the rubber strip fixation on the processing quality of the planetary wheel, and do not need to perform subsequent rubber strip cleaning work, thereby improving the processing efficiency of the planetary wheel.

[0008] In a specific possible implementation manner, the support bar is rotatably connected to the mounting column, and the rotation axis of the support bar is coaxially arranged with the mounting column.

[0009] By adopting the above technical solution, the rotatable support bar is designed, and after the planetary wheel is temporarily clamped by other clamping and fixing tools, the relative position of the support bar and the planetary wheel can be rotated to achieve the correspondence between the clearance gap and the clamping cavity on the planetary wheel, without the need to reposition the planetary wheel.

[0010] In a specific possible implementation scheme, a plurality of accommodating cavities are opened on the top wall of the support bar, a sliding block is slidably connected in the accommodating cavity, and a transposition ball is rollingly embedded in the sliding block close to the pressure bar, and a telescopic spring is connected to the side of the sliding block away from the pressure bar.

[0011] By adopting the above technical solution, the designed sliding block, transposition ball and telescopic spring can facilitate the position rotation of the support bar.

[0012] In a specific implementation scheme, a sliding support column is connected to the side of the support bar away from the mounting column, an annular groove is provided on the positioning plate, and the sliding support column slides in the annular groove at one end away from the support bar.

[0013] By adopting the above technical solution, the designed sliding support column can support the side of the support bar away from the mounting column, and then when the support bar is subjected to the gravity from the planetary wheel and the indirect pressure from the pressure bar, the deformation degree of the support bar can be reduced, thereby achieving effective support for the planetary wheel.

[0014] In a specific possible implementation scheme, a linkage column is connected to the support bar, a linkage hole is opened on the pressure bar, the linkage column passes through the center hole on the planetary wheel and extends into the linkage hole, and the pressure bar is slidably connected to the mounting ring, and the pressure bar rotates around the axis of the mounting column.

[0015] By adopting the above technical solution, the designed linkage column can realize the linkage of the support bar and the pressure bar, thereby facilitating the simultaneous change of the relative position of the upper and lower clamping and fixing structures of the planetary wheel and the planetary wheel, thereby improving the processing efficiency of the planetary wheel.

[0016] In a specific possible implementation scheme, the linkage column is slidably connected to the support bar, the linkage column slides horizontally along the radial direction of the mounting column, and the linkage hole is configured in a strip shape.

[0017] By adopting the above technical solution, the linkage column designed to slide with the support bar can achieve the linkage between the support bar and the pressure bar while abutting the side wall of the center hole of the planetary wheel, thereby realizing the position control of the planetary wheel along the radial direction of the installation column.

[0018] In a specific embodiment, a radial fixing unit is further included, and the radial fixing unit includes: An annular airbag, the annular airbag is sleeved on the mounting column, and the annular airbag is located between the plurality of linkage columns; An air delivery pipe extends into the inner cavity of the mounting column, and one end of the air delivery pipe extends out and is connected to the annular airbag.

[0019] By adopting the above technical solution, the designed radial fixing unit can control the expansion and contraction of the annular airbag through the air pipe and the external air pressure control device, thereby pushing the linkage column to press against the inner side wall of the center hole of the planetary wheel.

[0020] In a specific possible implementation manner, the supporting strip and the pressure strip are both connected with triangular reinforcing ribs on the sides away from each other.

[0021] By adopting the above technical solution, the designed triangular reinforcing ribs can improve the structural strength of the support bars and the pressure bars, reduce their own deformation when tightening and fixing the planetary wheel, and ensure the stability of the planetary wheel fixation.

[0022] In a second aspect, the present application provides a planetary wheel forming and engraving machine.

[0023] A planetary wheel forming engraving machine comprises an engraving machine body and a clamping tool, wherein the positioning plate is detachably and fixedly connected to the engraving machine body.

[0024] By adopting the above technical scheme, the positioning plate and the workbench of the planetary wheel forming engraving machine are first fixed by a vise or bolts, and the mounting column is vertically arranged at this time, and then the planetary wheel that has been preliminarily processed is installed on the positioning plate, and at this time the mounting column passes through the center hole of the planetary wheel, and the bottom wall of the planetary wheel is in contact with the supporting plane formed by the support strip, and then force is applied to the mounting ring, and the mounting ring drives the pressure strip to move toward the planetary wheel, and then the locking nut is screwed until the pressure strip and the support strip clamp and fix the planetary wheel. Before completely clamping and fixing, it is necessary to adjust the relative position of the support strip and the pressure strip according to the opening position of the clamping cavity on the planetary wheel; the mounting column can be fixed by the positioning plate, and the mounting column can be used as the installation base of the support strip and limit the movement range of the mounting ring. The planetary wheel can be tightly fixed by the cooperation of the support strip and the pressure strip, so as to facilitate the processing of the clamping cavity of the planetary wheel, avoid the influence of the rubber strip fixation on the processing quality of the planetary wheel, and do not need to carry out subsequent rubber strip cleaning work, thereby improving the processing efficiency of the planetary wheel.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The designed clamping fixture can fix the mounting column through the positioning plate, and the mounting column can be used as the installation basis of the support bar and limit the movement range of the mounting ring. The support bar and the pressure bar can cooperate to achieve the tight fixation of the planetary wheel, which is convenient for the processing of the clamping cavity of the planetary wheel, avoiding the influence of the rubber strip fixation on the processing quality of the planetary wheel, and eliminating the need for subsequent rubber strip cleaning work, thereby improving the processing efficiency of the planetary wheel.

[0026] 2. The designed clamping fixture can support the side of the support bar away from the mounting column, and then when the support bar is subjected to the gravity from the planetary wheel and the indirect pressure from the pressure bar, the deformation degree of the support bar can be reduced, thereby achieving effective support for the planetary wheel.

[0027] 3. The designed clamping fixture can control the expansion and contraction of the annular airbag through the air pipe and the external air pressure control device, thereby pushing the linkage column to press against the inner wall of the center hole of the planetary wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the clamping tooling according to an embodiment of the present application.

[0029] Figure 2 is Figure 1 Schematic diagram of the structure after adding triangular reinforcing ribs on the basis of.

[0030] Figure 3 is Figure 2 Schematic diagram of the structure after adding sliding blocks, transposition balls and telescopic springs to the foundation.

[0031] Figure 4 yes Figure 3 Sectional view in .

[0032] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure of part A in FIG.

[0033] Figure 6 is Figure 4 Schematic diagram of the structure after sliding support columns and annular grooves are added to the foundation.

[0034] Figure 7 is Figure 6 Schematic diagram of the structure after adding linkage columns and radial fixing units to the foundation.

[0035] Figure 8 yes Figure 7 sectional view of .

[0036] Fig. 9 It is a schematic diagram of the use status of the clamping tool in the embodiment of the present application.

[0037] Explanation of the accompanying drawings: 1. Positioning plate; 11. Annular groove; 2. Mounting column; 3. Support bar; 31. Sliding block; 32. Transposition ball; 33. Telescopic spring; 34. Linkage column; 4. Mounting ring; 5. Pressure bar; 51. Linkage hole; 6. Locking nut; 7. Sliding support column; 8. Radial fixing unit; 81. Annular airbag; 82. Air pipe; 9. Triangular reinforcement rib. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-9 This application is described in further detail.

[0039] The embodiment of the present application discloses a clamping tool and a planetary wheel forming engraving machine.

[0040] In a first aspect, an embodiment of the present application discloses a clamping tool.

[0041] Reference Figure 1 A clamping tool includes a positioning plate 1, a mounting column 2 and a plurality of support bars 3. The positioning plate 1 is provided with a plurality of countersunk bolt holes or a clamping portion that can cooperate with a vise, so as to achieve fixation with the worktable of a planetary wheel forming engraving machine. The mounting column 2 is welded and fixed to the positioning plate 1, and the axis of the mounting column 2 is perpendicular to the plane where the top wall of the positioning plate 1 is located, and the mounting column 2 can pass through the center hole on the planetary wheel; the support bar 3 is connected to the mounting column 2, and the top walls of the plurality of support bars 3 constitute a support plane, the bottom wall of the planetary wheel is in contact with the support plane, and a clearance gap corresponding to the position of the clamping cavity on the planetary wheel is formed between two adjacent support bars 3.

[0042] Reference Figure 1Furthermore, the clamping tool also includes a mounting ring 4 and a plurality of pressure strips 5. The mounting ring 4 is coaxially sleeved on the mounting column 2, and the mounting ring 4 can rotate with the central axis of the mounting column 2 as the rotation axis. The pressure strips 5 are connected to the circumferential side of the mounting ring 4, and the bottom walls of the plurality of pressure strips 5 constitute a pressure plane parallel to the supporting plane. The pressure plane abuts against the top wall of the planetary wheel. The clamping structure for clamping and fixing the planetary wheel can be formed by the pressure strips 5 and the support strips 3.

[0043] Reference Figure 1 In order to make the pressure bar 5 move toward the support bar 3, a locking nut 6 is threadedly connected to the mounting column 2. The locking nut 6 is located on the side of the mounting ring 4 away from the support bar 3. By turning the locking nut 6, the pressure bar 5 can be driven to move toward the planetary wheel until the planetary wheel is clamped and fixed.

[0044] Reference Figure 2 In order to improve the structural strength of the support bar 3 and the pressure bar 5, reduce their own deformation when tightening and fixing the planetary wheel, and ensure the stability of the planetary wheel fixation, the support bar 3 and the pressure bar 5 are welded and fixed on the side away from each other with triangular reinforcing ribs 9, and the height of the triangular reinforcing ribs 9 decreases toward the side away from the mounting column 2.

[0045] Reference Figure 2 The number of support bars 3 can be two, three, four, or any other number. In this embodiment, the number of support bars 3 and pressure bars 5 are both four, and the support bar 3 is rotatably connected to the mounting column 2. The rotation axis of the support bar 3 is coaxially arranged with the mounting column 2. Through the rotatable support bar 3, after the planetary wheel is temporarily clamped by other clamping and fixing tools, the relative position of the support bar 3 and the planetary wheel can be rotated to achieve the correspondence between the position of the clearance gap and the clamping cavity on the planetary wheel, and there is no need to reposition the planetary wheel.

[0046] Reference Figures 3 to 5 Furthermore, a plurality of accommodating cavities are provided on the top wall of the support bar 3, in which a sliding block 31 is slidably connected, a transposition ball 32 is rollingly embedded on the side of the sliding block 31 close to the pressure bar 5, and a telescopic spring 33 is abutted on the side of the sliding block away from the pressure bar 5, and the other end of the telescopic spring 33 is welded and fixed to the bottom wall of the accommodating cavity; through the sliding block 31, the transposition ball 32 and the telescopic spring 33, the position rotation of the support bar 3 can be easily realized.

[0047] Reference Figure 6In order to support the side of the support bar 3 away from the mounting column 2, and then reduce the deformation of the support bar 3 when the support bar 3 is subjected to the gravity from the planetary wheel and the indirect pressure of the pressure bar 5, thereby achieving effective support for the planetary wheel, a sliding support column 7 is welded and fixed to the end of the support bar 3 away from the mounting column 2, and an annular groove 11 is formed on the positioning plate 1, the annular groove 11 is coaxially arranged with the mounting column 2, and the end of the sliding support column 7 away from the support bar 3 slides in the annular groove 11.

[0048] Reference Figure 7 and Figure 8 Specifically, a linkage column 34 is connected to the side of the support bar 3 away from the sliding support column 7, and a linkage hole 51 is opened on the pressure bar 5. The linkage column 34 is arranged through the center hole on the planetary wheel, and the end of the linkage column 34 away from the support bar 3 can be extended into the linkage hole 51 to realize the connection between the linkage column 34 and the pressure bar 5, and the pressure bar 5 is slidably connected to the mounting ring 4, and the pressure bar 5 rotates horizontally around the axis of the mounting column 2; the linkage between the support bar 3 and the pressure bar 5 can be realized, and then it is convenient to simultaneously realize the relative position change of the upper and lower clamping and fixing structure of the planetary wheel and the planetary wheel, thereby improving the processing efficiency of the planetary wheel.

[0049] Reference Figure 7 and Figure 8 Furthermore, the linkage column 34 is slidably connected to the support bar 3, and the linkage column 34 slides horizontally along the radial direction of the mounting column 2. The linkage hole 51 is adaptively set to a strip shape, so that the linkage column 34 can slide radially along the mounting column 2 while realizing the linkage between the support bar 3 and the pressure bar 5; through the linkage column 34 sliding with the support bar 3, it is possible to realize the abutment against the side wall of the center hole of the planetary wheel while realizing the linkage between the support bar 3 and the pressure bar 5, thereby realizing the position control of the planetary wheel along the radial direction of the mounting column 2.

[0050] Reference Figures 7 to 9 In order to achieve the tight contact between the linkage column 34 and the inner circumference of the center hole of the planetary wheel, a radial fixing unit 8 is also included. The radial fixing unit 8 includes an annular airbag 81 and an air pipe 82. The annular airbag 81 is sleeved on the mounting column 2, and the annular airbag 81 is located between multiple linkage columns 34. The air pipe 82 extends into the inner cavity of the mounting column 2, and one end of the air pipe 82 extends to the outside of the mounting column 2 and is connected to the annular airbag 81, and the other end of the air pipe 82 is connected to an external air pressure control device such as an air pump; the air pipe 82 cooperates with the external air pressure control device to control the expansion and contraction of the annular airbag 81, thereby pushing the linkage column 34 to contact the inner side wall of the center hole of the planetary wheel.

[0051] The implementation principle of a clamping tool in an embodiment of the present application is: first fix the positioning plate 1 and the workbench of the planetary wheel forming engraving machine by a vise or bolts, at this time, the mounting column 2 is set vertically, and then the planetary wheel that has been preliminarily processed is installed on the positioning plate 1, at this time, the mounting column 2 passes through the center hole of the planetary wheel, and the bottom wall of the planetary wheel is in contact with the supporting plane formed by the support bar 3, and then force is applied to the mounting ring 4, and the mounting ring 4 drives the pressure bar 5 to move toward the planetary wheel, and then the locking nut 6 is turned until the pressure bar 5 and the support bar 3 clamp the planetary wheel and fix it. Before completely clamping and fixing, it is necessary to adjust the relative position of the support bar 3 and the pressure bar 5 according to the opening position of the clamping cavity on the planetary wheel.

[0052] After the current clamping cavity on the planetary wheel is processed, it is necessary to change the relative positions of the support strip 3 and the pressure strip 5 and the planetary wheel, so that the position of the next clamping cavity corresponds to the position of the clearance gap, so as to achieve the support of the planetary wheel to the greatest extent. At this time, the locking nut 6 is turned and the gas pressure in the annular airbag 81 is reduced until the planetary wheel can move axially along the mounting column 2. The telescopic spring 33 applies force to the planetary wheel through the sliding block 31 and the transposition ball 32, so that the planetary wheel moves upward along the axial direction of the mounting column 2. At this time, force is applied to the pressure strip 5, and the pressure strip 5 drives the support strip 3 to move through the linkage column 34 until the clearance gap The opening can correspond to the processing position of the next clamping cavity, and then the locking nut 6 can be re-tightened until the planetary wheel abuts against the support bar 3, and then the annular airbag 81 expands to achieve radial fixation of the planetary wheel; the mounting column 2 can be fixed by the positioning plate 1, and the mounting column 2 can be used as the installation basis of the support bar 3 and limit the movement range of the mounting ring 4. The support bar 3 and the pressure bar 5 cooperate to achieve the tight fixation of the planetary wheel, which is convenient for the processing of the clamping cavity of the planetary wheel, avoiding the influence of the rubber strip fixation on the processing quality of the planetary wheel, and there is no need for subsequent rubber strip cleaning work, thereby improving the processing efficiency of the planetary wheel.

[0053] In a second aspect, an embodiment of the present application discloses a planetary wheel forming and engraving machine.

[0054] Reference Figure 1-Figure 9 A planetary wheel forming engraving machine comprises an engraving machine body and a clamping tool as disclosed in the first aspect of the embodiment of the present application, wherein a positioning plate 1 is detachably fixedly connected to the engraving machine body by bolts or a vise.

[0055] First, fix the positioning plate 1 and the workbench of the planetary wheel forming engraving machine with a vise or bolts. At this time, the mounting column 2 is set vertically, and then the planetary wheel that has been preliminarily processed is installed on the positioning plate 1. At this time, the mounting column 2 passes through the center hole of the planetary wheel, and the bottom wall of the planetary wheel is in contact with the supporting plane formed by the support bar 3. Then, force is applied to the mounting ring 4, and the mounting ring 4 drives the pressure bar 5 to move toward the planetary wheel. Then, the locking nut 6 is turned until the pressure bar 5 and the support bar 3 clamp the planetary wheel. Before completely clamping and fixing, it is necessary to adjust the relative position of the support bar 3 and the pressure bar 5 according to the opening position of the clamping cavity on the planetary wheel.

[0056] After the current clamping cavity on the planetary wheel is processed, it is necessary to change the relative positions of the support strip 3 and the pressure strip 5 and the planetary wheel, so that the position of the next clamping cavity corresponds to the position of the clearance gap, so as to achieve the support of the planetary wheel to the greatest extent. At this time, the locking nut 6 is turned and the gas pressure in the annular airbag 81 is reduced until the planetary wheel can move axially along the mounting column 2. The telescopic spring 33 applies force to the planetary wheel through the sliding block 31 and the transposition ball 32, so that the planetary wheel moves upward along the axial direction of the mounting column 2. At this time, force is applied to the pressure strip 5, and the pressure strip 5 drives the support strip 3 to move through the linkage column 34 until the clearance gap The opening can correspond to the processing position of the next clamping cavity, and then the locking nut 6 can be re-tightened until the planetary wheel abuts against the support bar 3, and then the annular airbag 81 expands to achieve radial fixation of the planetary wheel; the mounting column 2 can be fixed by the positioning plate 1, and the mounting column 2 can be used as the installation basis of the support bar 3 and limit the movement range of the mounting ring 4. The support bar 3 and the pressure bar 5 cooperate to achieve the tight fixation of the planetary wheel, which is convenient for the processing of the clamping cavity of the planetary wheel, avoiding the influence of the rubber strip fixation on the processing quality of the planetary wheel, and there is no need for subsequent rubber strip cleaning work, thereby improving the processing efficiency of the planetary wheel.

[0057] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A clamping tool, characterized in that: include: A positioning plate (1), wherein a mounting column (2) is vertically connected to the positioning plate (1), and the mounting column (2) is capable of passing through a center hole on the planetary wheel; A plurality of support bars (3), wherein the support bars (3) are connected to the mounting column (2), the top walls of the plurality of support bars (3) form a support plane, and a clearance gap is formed between two adjacent support bars (3); A mounting ring (4), wherein the mounting ring (4) is coaxially sleeved on the mounting column (2), and a plurality of pressure strips (5) are connected to the mounting ring (4), and the bottom walls of the plurality of pressure strips (5) form a pressure plane parallel to the supporting plane; A locking nut (6), wherein the locking nut (6) is threadedly connected to the mounting column (2), and the locking nut (6) is located on a side of the mounting ring (4) away from the support bar (3).

2. The clamping tool according to claim 1, characterized in that: The support bar (3) is rotatably connected to the mounting column (2), and the rotation axis of the support bar (3) is coaxially arranged with the mounting column (2).

3. The clamping tool according to claim 2, characterized in that: A plurality of accommodating cavities are provided on the top wall of the support bar (3), and a sliding block (31) is slidably connected in the accommodating cavity. A transposition ball (32) is rollingly embedded in the side of the sliding block (31) close to the pressure bar (5), and a telescopic spring (33) is connected to the side of the sliding block (31) away from the pressure bar (5).

4. The clamping tool according to claim 2, characterized in that: The side of the support bar (3) away from the mounting column (2) is connected to a sliding support column (7), an annular groove (11) is provided on the positioning plate (1), and the end of the sliding support column (7) away from the support bar (3) slides in the annular groove (11).

5. The clamping tool according to claim 2, characterized in that: The support bar (3) is connected to a linkage column (34), and the pressure bar (5) is provided with a linkage hole (51). The linkage column (34) passes through the center hole on the planetary wheel and extends into the linkage hole (51). The pressure bar (5) is slidably connected to the mounting ring (4), and the pressure bar (5) rotates around the axis of the mounting column (2).

6. The clamping tool according to claim 5, characterized in that: The linkage column (34) is slidably connected to the support bar (3), the linkage column (34) slides horizontally along the radial direction of the installation column (2), and the linkage hole (51) is configured in a strip shape.

7. The clamping tool according to claim 6, characterized in that: It also includes a radial fixing unit (8), wherein the radial fixing unit (8) includes: an annular airbag (81), the annular airbag (81) being sleeved on the mounting column (2), and the annular airbag (81) being located between a plurality of the linkage columns (34); An air delivery pipe (82), the air delivery pipe (82) extends into the inner cavity of the mounting column (2), and one end of the air delivery pipe (82) extends out and is connected to the annular air bag (81).

8. The clamping tool according to claim 1, characterized in that: The supporting strip (3) and the pressure strip (5) are both connected to triangular reinforcing ribs (9) on the sides away from each other.

9. A planetary wheel forming engraving machine, characterized in that: It comprises an engraving machine body and a clamping tool as described in any one of claims 1 to 8, wherein the positioning plate (1) is detachably fixedly connected to the engraving machine body.

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