A fixed tool for piston radial processing

Abstract

The present invention discloses a fixed tool for radial processing of a piston, comprising: a lower mounting seat, a rotating machine table, a height extension seat, a mounting table, and a rotating motor; and further comprising: an internal expansion structure, comprising an expansion seat arranged on the mounting table, the interior of the expansion seat being hollow, a multifunctional hole being opened on the side of the expansion seat, an exhaust hole being opened on the top of the expansion seat, a displacement member being arranged on the inner side of the height extension seat, the top of the displacement member passing through the interior of the expansion seat and being fitted to the top of the expansion seat; an adjustable exhaust structure, comprising a steering member arranged at the lower end of the displacement member, a switching member being arranged on the top of the displacement member, the switching member being movably matched with the steering member, and the steering member being electrically connected to the displacement member. The present invention can avoid internal deformation of the piston or the appearance of a rough surface, thereby ensuring the tolerance of the piston during subsequent use.

Description

Technical Field

[0001] The invention relates to piston processing, in particular to a fixing tool for piston radial processing. Background Art

[0002] The piston is a component that performs reciprocating motion in the cylinder block of a car engine. The entire piston can be mainly divided into three parts: the piston crown, the piston head and the piston skirt. The piston cooperates with the piston pin. The main function of the piston is to withstand the combustion pressure in the cylinder and transmit this force to the crankshaft through the piston pin and the connecting rod. After the piston is stamped and formed, the radial direction of the stamped piston needs to be processed again to make the piston adapt to different machines. Since the interior of the piston needs to cooperate with the piston pin and the connecting rod, the interior of the piston is a hollow structure, which makes it more difficult to fix the piston during the processing stage.

[0003] The traditional piston fixing structure is to set the opening position of the entire piston into a seat body and limit the piston through the bottom seat body. However, the fixing point of this fixing method is only at the lower end, and the bottom seat body is prone to wear against the inner wall of the piston. Moreover, since the processing point is at the upper end, its limiting ability is limited. Therefore, the existing method also applies a limiting force on the top of the piston, so that both the lower and upper ends of the piston are limited. Although the problem of the upper end being easily offset and rotated can be solved, the limiting force applied at the upper end can easily cause the piston to deform, thereby affecting the processing accuracy.

[0004] Therefore, this case aims to provide a fixed tooling for piston radial processing, which can not only provide elastic and multi-segment support to the piston internally, ensure the stability of the upper processing area, avoid internal deformation or rough surface of the piston, and ensure the tolerance of the piston during subsequent use. Summary of the Invention

[0005] The present invention provides a fixing tool for radial processing of a piston, which can effectively solve the above-mentioned problem.

[0006] The present invention is achieved in that:

[0007] A fixing tool for piston radial processing, comprising: a lower mounting seat, a rotary table disposed above the lower mounting seat, a height extension seat disposed at the upper end of the rotary table, a mounting table disposed on the top of the height extension seat, the mounting table being used to accommodate the piston, a rotating motor located within the lower mounting seat disposed at the lower end of the height extension seat, and further comprising:

[0008] The internal expansion structure includes an expansion seat provided on the mounting platform, wherein the interior of the expansion seat is hollow, a multifunctional hole is provided on the side of the expansion seat, an exhaust hole is provided on the top of the expansion seat, a displacement member is provided on the inner side of the height extension seat, the top of the displacement member passes through the interior of the expansion seat and fits against the top of the expansion seat, after the piston is clamped on the expansion seat of the mounting platform, the displacement member moves downward and squeezes the expansion seat, exhausting the air in the expansion seat through the exhaust hole and the multifunctional hole, so that the expansion seat is closely attached to the inner wall of the piston;

[0009] The adjustable exhaust structure includes a steering member arranged at the lower end of the displacement member, a switching member is arranged on the top of the displacement member, the switching member and the steering member are movably coordinated, and the steering member and the displacement member are electrically connected. When the displacement member drops to a preset distance, the steering member turns and drives the displacement member to rotate, so that the switching member closes the displacement member and the exhaust hole, allowing the multi-functional hole to adsorb the inner wall of the piston.

[0010] As a further improvement, the expansion seat is an elastic cylindrical structure, and the expansion seat expands outwards when pressurized.

[0011] As a further improvement, the displacement member includes a push rod motor arranged in the height extension seat, the push rod of the push rod motor passes through the expansion seat, and a pressure plate connected to the push rod motor is provided on the top of the expansion seat, and the pressure plate is always in contact with the top surface of the expansion seat.

[0012] As a further improvement, a guide hole communicating with the exhaust hole is provided on the pressure plate.

[0013] As a further improvement, the guide hole includes a small accommodating hole and a large accommodating hole opened on the top of the pressure plate, the small accommodating hole and the large accommodating hole are connected by a cross-section, and the switching member is embedded in the large accommodating hole after the steering member rotates.

[0014] As a further improvement, the outer edge of the bottom surface of the pressure plate is sleeved with a circle of sliding pads, and the top surface of the expansion seat is provided with an annular groove that fits with the sliding pads.

[0015] As a further improvement, the steering member includes a set of guide cylinders arranged at the bottom of the displacement member, and the bottom of the guide cylinders is connected to a direction-changing motor.

[0016] As a further improvement, a plug-in column head is provided in the middle of the pressure plate, the switching member includes a switching plate larger than the diameter of the pressure plate, a plug-in sleeve is fixedly provided at the center of the bottom of the switching plate, and the plug-in column head rotates in the plug-in sleeve when the steering member drives the pressure plate to rotate.

[0017] As a further improvement, a closing column is provided on one side of the switching plate facing the pressure plate, and the diameter of the closing column is the same as that of the large accommodating hole and larger than that of the small accommodating hole.

[0018] As a further improvement, the outer circumference of the switching plate is recessed inward to form an inner cavity, the inner cavity is filled with an air-blocking airbag, a micro motor is provided in the air-blocking airbag, and the micro motor is controlled by an external wireless switch.

[0019] The beneficial effects of the present invention are:

[0020] The existing multi-point fixing method not only makes it easy for the bottom seat to wear against the inner wall of the piston, but also the limiting force applied at the upper end can easily cause the piston to deform, thereby affecting the processing accuracy and the quality of the piston. Therefore, the present invention provides an internal expansion structure, sets an expansion seat on the mounting table, and moves the displacement member penetrating the expansion seat downward to squeeze the expansion seat, so as to squeeze the gas in the expansion seat outward, expand the expansion seat outward and fit tightly to the inner wall of the piston, thereby ensuring the restriction of the inner wall of the piston, and because the expansion seat itself has a certain elasticity and height, it will not affect the inner wall of the piston, and there is no need to apply pressure on the top, which makes the piston more accurate.

[0021] Since the piston is a hollow cylindrical structure, the corresponding expansion seat is also a cylindrical structure. In order to allow it to expand outward after being pressurized, the expansion seat is elastically set and hollow inside, so that the gas inside can be discharged when under pressure, providing a basis for the subsequent suction cup effect.

[0022] Since the space between the piston and the expansion seat is very small, it is impossible to set up any structure. Therefore, the present invention uses a displacement member to drive the expansion seat. The displacement member is set on the inner side of the height extension seat and extends through the expansion seat, so that the deformation degree of the expansion seat can be controlled through the pressure plate by extending and retracting the push rod motor, thereby controlling the pressing force between the expansion seat and the piston.

[0023] Although the deformation state of the expansion seat is controlled by the pressure plate, in fact the pressure plate still needs to allow the gas in the expansion seat to overflow. Therefore, a guide hole connected to the exhaust hole is provided on the pressure plate of the present invention, so that the exhaust phenomenon is not affected when the pressure plate acts on the expansion seat.

[0024] There are actually two states of the guide hole, one is the normal exhaust state, and the other is the blocked state. When in the normal exhaust state, the large accommodating hole on the guide hole is connected to the exhaust hole. At this time, the switching part is located at the position of the small accommodating hole. When it needs to be switched to the blocked state, that is, when the gas inside the expansion seat no longer leaks out through the top, the large accommodating hole is closed so that the exhaust hole cannot communicate with the outside, thereby ensuring that the gas in the expansion seat will only flow from the side.

[0025] Although the pressure plate tightly presses the expansion seat, it needs to change its own rotation angle when cooperating with the switching part. Therefore, a circle of sliding pads is provided on the outer edge of the bottom surface of the pressure plate of the present invention. When the pressure plate rotates, the sliding pad cooperates with the annular groove to achieve the purpose of both pressure application and rotation without affecting the sealing of local corner positions.

[0026] Although the expansion seat can expand outward and fix the bottom side of the piston tightly, in fact, the fixing effect of the piston is limited if it is only through the pressing force. Therefore, the present invention provides an adjustable exhaust structure based on the internal expansion structure, and changes the orientation of the switching member through the steering member, so that the switching member can close the displacement member and the exhaust hole, and thus the gas can no longer be discharged from the position of the displacement member and the exhaust hole, so that negative pressure can be generated at the position of the multi-functional hole, and the expansion seat can tightly adsorb the inner wall of the piston, which can not only produce abutment effect, but also negative pressure adsorption effect, thereby ensuring the fixing effect of the tooling on the piston.

[0027] The relative position between the switching member and the pressure plate needs to be changed. Therefore, a closing column is installed on the switching member of the present invention, so that the position can be switched between the large accommodating hole and the small accommodating hole when switching the position, thereby achieving the effect of closing the pressure plate and / or opening the pressure plate, allowing the expansion seat to switch freely between extrusion and suction.

[0028] When the steering member changes its position, the position of the switching member is actually stationary. The reason why the switching member can remain stationary is that its outer side is concave inward and is provided with an air-blocking airbag, so that the air-blocking airbag can expand outward and fit tightly against the inner wall of the piston before the steering member turns. Due to the cooperation between the plug-in column head and the plug-in sleeve, the state of the switching member will not be affected in the process of the steering member driving the pressure plate to rotate, thereby achieving the top sealing effect of the expansion seat, and the air-blocking airbag itself provides a part of the inward limiting force on the inner wall of the piston. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0031] Figure 2 It is a schematic diagram of the top structure of the present invention.

[0032] Figure 3 This invention Figure 2 Cross-section view at AA in the middle.

[0033] Figure 4 This invention Figure 3 Magnified view of area A in center.

[0034] Figure 5 It is a structural schematic diagram of the guide hole of the present invention.

[0035] Figure 6 It is a structural schematic diagram of the present invention installed on milling equipment.

[0036] Figure 7 This invention Figure 6 Top view of .

[0037] Figure 8 This invention Figure 7 Cross-section of the BB.

[0038] In the picture:

[0039] Lower mounting seat 10, rotating machine table 20, height extension seat 30, mounting platform 40, rotating motor 50, internal expansion structure 60, expansion seat 61, multi-function hole 62, exhaust hole 63, displacement member 64, push rod motor 641, pressure plate 642, sliding pad 6421, plug-in column head 6422, guide hole 643, small accommodating hole 6431, large accommodating hole 6432, cross-section 6433, adjustable drainage structure 70, steering member 71, guide cylinder 711, direction-changing motor 712, switching member 72, switching plate 721, plug-in sleeve 722, closing column 723, air-sealing airbag 724. DETAILED DESCRIPTION

[0040] All embodiments of the present invention are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0041] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as referring to the purpose, technical solutions and advantages of the methods. To be clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work indicate or imply relative importance or implicitly indicate the number of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0042] Reference Figures 1 to 8As shown, a fixing tool for piston radial processing is installed in a milling device, including: a lower mounting seat 10, a rotating machine table 20 is provided above the lower mounting seat 10, a height extension seat 30 is provided at the upper end of the rotating machine table 20, a mounting platform 40 is provided on the top of the height extension seat 30, the mounting platform 40 is used to accommodate the piston, and a rotating motor 50 located in the lower mounting seat 10 is provided at the lower end of the height extension seat 30. It also includes: an internal expansion structure 60, including an expansion seat 61 provided on the mounting platform 40, the interior of the expansion seat 61 is hollow, a multifunctional hole 62 is opened on the side of the expansion seat 61, an exhaust hole 63 is opened on the top of the expansion seat 61, a displacement member 64 is provided on the inner side of the height extension seat 30, and the top of the displacement member 64 passes through the expansion seat 6 1 and fits on the top of the expansion seat 61. After the piston is clamped on the expansion seat 61 of the mounting platform 40, the displacement member 64 moves downward and squeezes the expansion seat 61, and the air in the expansion seat 61 is discharged through the exhaust hole 63 and the multi-function hole 62, so that the expansion seat 61 is tightly attached to the inner wall of the piston; the adjustable exhaust structure 70 includes a steering member 71 arranged at the lower end of the displacement member 64, and a switching member 72 is provided on the top of the displacement member 64. The switching member 72 is movably matched with the steering member 71, and the steering member 71 is electrically connected to the displacement member 64. When the displacement member 64 drops to a preset distance, the steering member 71 turns and drives the displacement member 64 to rotate, so that the switching member 72 closes the displacement member 64 and the exhaust hole 63, allowing the multi-function hole 62 to adsorb the inner wall of the piston.

[0043] When fixing the piston, the piston is moved to the top of the expansion seat 61 by a manipulator in the form of a crane movement, so that the inner wall of the piston is nested in the outer side of the expansion seat 61.

[0044] The existing multi-point fixing method not only makes it easy for the bottom seat to wear against the inner wall of the piston, but also the limiting force applied at the upper end can easily cause the piston to deform, thereby affecting the processing accuracy and the quality of the piston. Therefore, the present invention sets an internal expansion structure 60, sets an expansion seat 61 on the mounting table 40, and moves the displacement member 64 that passes through the expansion seat 61 downward to squeeze the expansion seat 61, so as to squeeze the gas in the expansion seat 61 outward, expand the expansion seat 61 outward and fit tightly to the inner wall of the piston, thereby ensuring the restriction of the inner wall of the piston, and because the expansion seat 61 itself has a certain elasticity and height, it will not affect the inner wall of the piston, and there is no need to apply pressure on the top, which makes the piston more accurate.

[0045] Since the piston is a hollow cylindrical structure, the corresponding expansion seat 61 of this embodiment is an elastic cylindrical structure. The expansion seat 61 expands outward after being compressed. In order to allow it to expand outward after being compressed, the expansion seat 61 is elastically set and hollow inside, so that the gas inside can be discharged when under pressure, providing a basis for the subsequent suction cup effect.

[0046] Since the space between the piston and the expansion seat 61 is very small, it is impossible to set up any structure. Therefore, the method used in this embodiment to drive the expansion seat 61 is through the displacement member 64. Specifically, the displacement member 64 includes a push rod motor 641 arranged in the height extension seat 30. The push rod of the push rod motor 641 passes through the expansion seat 61. The top of the expansion seat 61 is provided with a pressure plate 642 connected to the push rod motor 641. The pressure plate 642 is always in contact with the top surface of the expansion seat 61. The displacement member 64 is arranged on the inner side of the height extension seat 30 and extends through the expansion seat 61, so that the deformation degree of the expansion seat 61 can be controlled through the pressure plate 642 by the extension and contraction of the push rod motor 641, thereby controlling the tightening force between the expansion seat 61 and the piston.

[0047] Although the deformation state of the expansion seat 61 is controlled by the pressure plate 642, in fact the pressure plate 642 still needs to allow the gas in the expansion seat 61 to overflow. Therefore, the pressure plate 642 of this embodiment is provided with a guide hole 643 connected to the exhaust hole 63, so that the exhaust phenomenon is not affected when the pressure plate 642 acts on the expansion seat 61.

[0048] The guide hole 643 actually has two states, specifically, one is a normal exhaust state, and the other is a blocked state, and the structure supporting its switching between the two states is specifically as follows: the guide hole 643 includes a small accommodating hole 6431 and a large accommodating hole 6432 opened on the top of the pressure plate 642, and the small accommodating hole 6431 and the large accommodating hole 6432 are connected by a cross-section 6433, and the switching member 72 is embedded in the large accommodating hole 6432 after the steering member 71 rotates. When in the normal exhaust state, the large accommodating hole 6432 on the guide hole 643 is connected to the exhaust hole 63, and the switching member 72 is located at the position of the small accommodating hole 6431. When it is necessary to switch to the blocked state, that is, to prevent the gas inside the expansion seat 61 from leaking out through the top, the large accommodating hole 6432 is closed, so that the exhaust hole 63 cannot communicate with the outside, thereby ensuring that the gas in the expansion seat 61 only flows from the side.

[0049] Although the pressure plate 642 tightly presses the expansion seat 61, it needs to change its own rotation angle when cooperating with the switching member 72. Therefore, the outer edge of the bottom surface of the pressure plate 642 of this embodiment is provided with a circle of sliding pads 6421, and the top surface of the expansion seat 61 is provided with an annular groove that fits with the sliding pads 6421. The outer edge of the bottom surface of the pressure plate 642 is provided with a circle of sliding pads 6421. When the pressure plate 642 rotates, the sliding pads 6421 cooperate with the annular groove, thereby achieving the purpose of both pressure application and rotation without affecting the sealing of local corner positions.

[0050] Although the expansion seat 61 can expand outward and press the bottom side of the piston tightly and fix it, in fact, the fixing effect of the piston is limited if it is only through the pressing force. Therefore, the present invention provides an adjustable exhaust structure 70 based on the internal expansion structure 60, and changes the orientation of the switching member 72 through the steering member 71, so that the switching member 72 can close the displacement member 64 and the exhaust hole 63, so that the gas can no longer be discharged from the position of the displacement member 64 and the exhaust hole 63, so that negative pressure can be generated at the position of the multi-functional hole 62, and the expansion seat 61 can tightly adsorb the inner wall of the piston, which can not only produce abutment effect, but also negative pressure adsorption effect, thereby ensuring the fixing effect of the tooling on the piston.

[0051] In order to enable the steering member 71 to achieve steering, specifically, the steering member 71 includes a set of guide cylinders 711 arranged at the bottom of the displacement member 64, and the bottom of the guide cylinder 711 is connected to a direction-changing motor 712, which drives the guide cylinder 711 and then drives the displacement member 64 to rotate.

[0052] The relative position between the switching member 72 and the pressure plate 642 needs to be changed. Therefore, the switching plate 721 of this embodiment is provided with a closing column 723 on the side facing the pressure plate 642. The diameter of the closing column 723 is the same as the large accommodating hole 6432 and is larger than the small accommodating hole 6431. By installing the closing column 723 on the switching member 72, the position can be switched between the large accommodating hole 6432 and the small accommodating hole 6431 when switching the position, thereby achieving the effect of closing the pressure plate 642 or opening the pressure plate 642, allowing the expansion seat 61 to switch freely between extrusion and suction.

[0053] When the steering member 71 changes its position, the position of the switching member 72 is actually stationary. The reason why the switching member 72 can remain stationary is that the outer circumference of the switching plate 721 is recessed inward to form an inner concave cavity, and the inner concave cavity is filled with an air-blocking airbag 724. A micro motor is provided in the air-blocking airbag 724, and the micro motor is controlled by an external wireless switch. The outer side of the micro motor is recessed inward and is provided with an air-blocking airbag 724, so that the air-blocking airbag 724 can expand outward and adhere to the inner wall of the piston before the steering member 71 turns. There is a plug-in column head 6422, and the switching member 72 includes a switching plate 721 that is larger than the diameter of the pressure plate 642. A plug-in sleeve 722 is fixedly provided at the center of the bottom of the switching plate 721. When the steering member 71 drives the pressure plate 642 to rotate, the plug-in column head 6422 rotates in the plug-in sleeve 722. The plug-in column head 6422 cooperates with the plug-in sleeve 722, so that the state of the switching member 72 is not affected during the process of the steering member 71 driving the pressure plate 642 to rotate, thereby realizing the top sealing effect of the expansion seat 61, and the air-blocking airbag 724 itself provides a part of the inward limiting force on the inner wall of the piston.

[0054] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A fixing tool for piston radial processing, characterized in that: include: A lower mounting seat (10) is provided with a rotating machine (20) above the lower mounting seat (10), a height extension seat (30) is provided at the upper end of the rotating machine (20), a mounting platform (40) is provided on the top of the height extension seat (30), the mounting platform (40) is used to accommodate a piston, and a rotating motor (50) located in the lower mounting seat (10) is provided at the lower end of the height extension seat (30), and further includes: An internal expansion structure (60) includes an expansion seat (61) disposed on a mounting platform (40), wherein the interior of the expansion seat (61) is hollow, a multifunctional hole (62) is provided on the side of the expansion seat (61), an exhaust hole (63) is provided on the top of the expansion seat (61), a displacement member (64) is provided on the inner side of the height extension seat (30), the top of the displacement member (64) passes through the interior of the expansion seat (61) and fits on the top of the expansion seat (61), and after the piston is clamped on the expansion seat (61) of the mounting platform (40), the displacement member (64) moves downward and squeezes the expansion seat (61), and the air in the expansion seat (61) is discharged through the exhaust hole (63) and the multifunctional hole (62), so that the expansion seat (61) is closely attached to the inner wall of the piston; The adjustable exhaust structure (70) includes a steering member (71) arranged at the lower end of the displacement member (64), a switching member (72) is arranged on the top of the displacement member (64), the switching member (72) and the steering member (71) are movably matched, and the steering member (71) and the displacement member (64) are electrically connected. When the displacement member (64) descends to a preset distance, the steering member (71) turns and drives the displacement member (64) to rotate, so that the switching member (72) closes the displacement member (64) and the exhaust hole (63), allowing the multifunctional hole (62) to adsorb the inner wall of the piston.

2. A fixing tool for piston radial processing according to claim 1, characterized in that: The expansion seat (61) is a cylindrical structure with elasticity, and the expansion seat (61) expands outwards when pressurized.

3. A fixing tool for piston radial processing according to claim 1, characterized in that: The displacement member (64) includes a push rod motor (641) arranged in the height extension seat (30), a push rod of the push rod motor (641) passes through the expansion seat (61), and a pressure plate (642) connected to the push rod motor (641) is provided on the top of the expansion seat (61), and the pressure plate (642) is always in contact with the top surface of the expansion seat (61).

4. A fixing fixture for piston radial processing according to claim 3, characterized in that: The pressure plate (642) is provided with a guide hole (643) communicating with the exhaust hole (63).

5. A fixing tool for piston radial processing according to claim 4, characterized in that: The guide hole (643) includes a small accommodating hole (6431) and a large accommodating hole (6432) opened on the top of the pressure plate (642). The small accommodating hole (6431) and the large accommodating hole (6432) are connected via a cross-section (6433). The switching member (72) is embedded in the large accommodating hole (6432) after the steering member (71) rotates.

6. A fixing tool for piston radial processing according to claim 4, characterized in that: The outer edge of the bottom surface of the pressure plate (642) is sleeved with a circle of sliding pads (6421), and the top surface of the expansion seat (61) is provided with an annular groove that fits with the sliding pads (6421).

7. A fixing tool for piston radial processing according to claim 1, characterized in that: The steering member (71) includes a guide cylinder (711) disposed at the bottom of the displacement member (64), and the bottom of the guide cylinder (711) is connected to a direction-changing motor (712).

8. The fixing tool for piston radial processing according to claim 6, characterized in that: A plug-in column head (6422) is provided in the middle of the pressure plate (642), the switching member (72) includes a switching plate (721) having a diameter larger than that of the pressure plate (642), a plug-in sleeve (722) is fixedly provided at the center of the bottom of the switching plate (721), and when the steering member (71) drives the pressure plate (642) to rotate, the plug-in column head (6422) rotates in the plug-in sleeve (722).

9. A fixing tool for piston radial processing according to claim 8, characterized in that: A closing column (723) is provided on one side of the switching plate (721) facing the pressure plate (642). The diameter of the closing column (723) is the same as that of the large accommodating hole (6432) and is larger than that of the small accommodating hole (6431).

10. A fixing tool for piston radial processing according to claim 9, characterized in that: The outer circumference of the switching plate (721) is recessed inward to form an inner concave cavity, and the inner concave cavity is filled with an air-blocking airbag (724). A micro motor is provided in the air-blocking airbag (724), and the micro motor is controlled by an external wireless switch.

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