CN218927509U

CN218927509U - Centering clamping and positioning mechanism

Info

Publication number: CN218927509U
Application number: CN202222714418.1U
Authority: CN
Inventors: 张瑞波; 刘浩
Original assignee: Fuxiang Precision Industrial Kunshan Co Ltd
Current assignee: Fuxiang Precision Industrial Kunshan Co Ltd
Priority date: 2022-10-14
Filing date: 2022-10-14
Publication date: 2023-04-28
Anticipated expiration: 2032-10-14

Abstract

The application relates to a gauge, aims at solving the problems that a detection mechanism is complex in structure, large in size and large in accumulated error when detecting the position degree of a part symmetry center, and provides a centering clamping and positioning mechanism. The centering clamping and positioning mechanism comprises a main body, a first clamping piece, a second clamping piece, a fixing pin and a transmission pin. The length direction of the first strip hole is arranged at a first angle with the length direction of the first connecting part. The length direction of the second strip hole is at a second angle with the length direction of the second connecting part. The fixing pin passes through the first through hole and the second through hole and is matched with the main body. The transmission pin passes through the first strip hole and the second strip hole and moves along the first strip hole and the second strip hole under the pushing of external force, so that the first connecting part and the second connecting part rotate around the fixed pin as the center to drive the first clamping block and the second clamping block to open and close relative to the workpiece. The centering clamping and positioning mechanism is simple in structure, small in size and small in accumulated error.

Description

Centering clamping and positioning mechanism

Technical Field

The application relates to a gauge, in particular to a centering clamping and positioning mechanism.

Background

In the process of machining and manufacturing the workpiece, the position degree of the symmetry center of the workpiece needs to be detected rapidly. The detection mechanism in the prior art uses a unilateral positioning method for real matching to detect the position degree of the symmetry center of the workpiece.

The detection result of the method is affected by the dimensional tolerance of the positioning surface of the detection mechanism, and the obtained detection result is inaccurate. In addition, the symmetry center position detection mechanism in the prior art has the advantages of complex structure, large volume and large accumulated error, and is not beneficial to the size positioning detection of small-size workpieces.

Disclosure of Invention

The application provides a clamp positioning mechanism placed in middle to solve detection mechanism when detecting the position degree of part symmetry center, detection mechanism's structure complicacy, bulky, the big problem of accumulated error.

Embodiments of the present application are implemented such that a centering clamp positioning mechanism includes a body, a first clamp, a second clamp, a fixed pin, and a drive pin. The main body is used for placing a workpiece. The first clamping piece comprises a first connecting portion and a first clamping block connected with the first connecting portion, a first through hole and a first strip hole are formed in the first connecting portion at intervals, and the length direction of the first strip hole and the length direction of the first connecting portion are arranged at a first angle. The second clamping piece comprises a second connecting portion and a second clamping block connected with the second connecting portion, a second through hole and a second strip hole are formed in the second connecting portion at intervals, and the length direction of the second strip hole and the length direction of the second connecting portion are arranged at a second angle. The fixing pin penetrates through the first through hole of the first clamping piece and the second through hole of the second clamping piece and is matched with the main body, so that the first clamping piece and the second clamping piece are fixed on the main body, and the first clamping block and the second clamping block are respectively located on two opposite sides of the workpiece. The transmission pin passes through the first strip hole and the second strip hole simultaneously and moves along the first strip hole and the second strip hole under the pushing of external force, so that the first connecting part and the second connecting part rotate with the fixing pin as the center to drive the first clamping block and the second clamping block to open and close relative to the workpiece.

Compared with the prior art, the centering clamping and positioning mechanism passes through the first strip hole and the second strip hole simultaneously through the transmission pin, and moves along the first strip hole and the second strip hole under the pushing of external force, and the transmission pin can enable the first connecting portion and the second connecting portion to rotate with the fixed pin as the center so as to drive the first clamping block and the second clamping block to open and close relative to the workpiece. Therefore, the centering clamping and positioning mechanism centers and positions the small-size workpiece, the center line of the workpiece is positioned in the middle of the first clamping block and the second clamping block, and the centering clamping and positioning mechanism detects the position of the center line of the workpiece. The centering clamping and positioning mechanism has the advantages of simple structure, small volume and small accumulated error.

In one possible embodiment, the first angle and the second angle are oriented in different directions, respectively, when the first clamping member and the second clamping member are assembled, and the first angle and the second angle have a value ranging between 25 ° and 35 °.

In one possible embodiment, the length of the first elongated hole is the same as the length of the second elongated hole, so that the driving pin can drive the first clamping block and the second clamping block to move by the same distance.

In one possible implementation manner, the centering clamping and positioning mechanism further comprises an elastic piece and a clamping pin, one end of the clamping pin is fixedly connected with the transmission pin, the other end of the clamping pin is connected with the elastic piece, and the elastic piece is elastically supported on the clamping pin so that the clamping pin can drive the transmission pin to move.

In one possible embodiment, the driving pin includes an integral ring portion and a connecting rod, the connecting rod is fixedly connected with the clamping pin, the diameter of the ring portion is larger than the diameters of the first elongated hole and the second elongated hole, and the ring portion is pressed against the second clamping piece and the first clamping piece.

In one possible embodiment, the body is provided with a first channel provided in the body in the direction of the connection of the securing pin to the driving pin. The main body is provided with a second channel, the second channel is communicated with the first channel, the transmission pin penetrates through the second channel and the first channel, the clamping pin is arranged on the first channel and extends from the first channel to the outer side of the main body, and the elastic piece is arranged at one end, close to the outer side of the main body, of the clamping pin.

In one possible embodiment, the first clamping member and the second clamping member have the same structure, and are symmetrically arranged with an axis as a symmetry axis, wherein the axis is a connecting line of the fixing pin and the transmission pin.

In one possible embodiment, the end portions of the first and second clamping blocks are cylindrical in shape, and the circumferential outer surface of the cylindrical body is in contact with the workpiece.

In one possible embodiment, the centering and clamping positioning mechanism further comprises a detection pin movably connected to the main body, the detection pin extending from the main body toward between the first clamping block and the second clamping block, the detection pin being for detecting a workpiece.

In one possible embodiment, the centering and clamping positioning mechanism further includes a stopper disposed opposite to the detection pin and fixedly connected to the main body, and protruding from a surface of the main body to abut against the workpiece.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly describe the drawings in the embodiments, it being understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a centering clamp positioning mechanism according to one embodiment of the present application;

FIG. 2 is a schematic view of the centering clamp positioning mechanism of FIG. 1;

FIG. 3 is a top view of the centering clamp positioning mechanism of FIG. 1;

FIG. 4 is a schematic view of the centering clamp positioning mechanism of FIG. 3 in an open state;

fig. 5 is an exploded view of the centering clamp positioning mechanism of fig. 1.

Description of main reference numerals:

centering clamping and positioning mechanism 1

Body 11

First channel 111

Second channel 112

Detection pin 113

Pin 114

Second spring 115

Holding piece 116

Limiting block 117

Workbench 118

Detection table 119

Work piece 12

First clamping member 13

First connecting portion 131

First clamping block 132

First through hole 133

First elongated hole 134

First angle 135

Second clamping member 14

Second connecting portion 141

Second clamping block 142

Second through hole 143

Second elongated hole 144

Second angle 145

Fixing pin 15

Pin 151

Drive pin 16

Annular ring portion 161

Connecting rod 162

Elastic member 17

First spring 171

Clamping pin 18

Gasket 181

Pin 182

Axis 19

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.

Some embodiments of the present application are described in detail. The following embodiments and features of the embodiments may be combined with each other without collision.

Referring to fig. 1 to 5, the present embodiment provides a centering and clamping positioning mechanism 1, which includes a main body 11, a first clamping member 13, a second clamping member 14, a fixing pin 15, and a driving pin 16. The body 11 is used for placing a workpiece 12. The first clamping member 13 includes a first connecting portion 131 and a first clamping block 132 connected to the first connecting portion 131, wherein a first through hole 133 and a first elongated hole 134 are formed in the first connecting portion 131 at intervals, and a length direction of the first elongated hole 134 is disposed at a first angle 135 with a length direction of the first connecting portion 131. The second clamping member 14 includes a second connecting portion 141 and a second clamping block 142 connected to the second connecting portion 141, and the second connecting portion 141 is provided with a second through hole 143 and a second elongated hole 144 at intervals, and a length direction of the second elongated hole 144 is set at a second angle 145 with a length direction of the second connecting portion 141. The fixing pin 15 passes through the first through hole 133 of the first clamping member 13, the second through hole 143 of the second clamping member 14 and cooperates with the main body 11, thereby fixing the first clamping member 13 and the second clamping member 14 to the main body 11, and the first clamping block 132 and the second clamping block 142 are respectively located at opposite sides of the workpiece 12. The driving pin 16 passes through the first elongated hole 134 and the second elongated hole 144 at the same time, and is pushed by an external force to move along the first elongated hole 134 and the second elongated hole 144, so that the first connecting portion 131 and the second connecting portion 141 rotate around the fixing pin 15 as a center to drive the first clamping block 132 and the second clamping block 142 to open and close relative to the workpiece 12.

The centering clamping and positioning mechanism 1 of the present embodiment passes through the first elongated hole 134 and the second elongated hole 144 simultaneously through the driving pin 16, and is pushed by an external force to move along the first elongated hole 134 and the second elongated hole 144, and the driving pin 16 can make the first connecting portion 131 and the second connecting portion 141 rotate around the fixing pin 15 as a center so as to drive the first clamping block 132 and the second clamping block 142 to open and close relative to the workpiece 12. Thus, the centering and clamping mechanism 1 centers the small-sized workpiece 12 so that the center line of the workpiece 12 is positioned at the middle position of the first clamping block 132 and the second clamping block 142, and the centering and clamping mechanism 1 detects the position of the center line of the workpiece 12. The centering clamping and positioning mechanism 1 of the embodiment has the advantages of simple structure, small volume and small accumulated error.

Referring to fig. 1 and 2, the main body 11 has a substantially L-shaped outline, and the main body 11 includes a transversely disposed table 118 and a vertically disposed detecting table 119, and the table 118 is integrally connected with the detecting table 119. The workpiece 12 is placed on a table 118.

The first clamping piece 13 and the second clamping piece 14 are arranged in a crossing way, the fixed pin 15 is arranged at the crossing part of the first clamping piece 13 and the second clamping piece 14, the first clamping piece 13, the second clamping piece 14 and the fixed pin 15 are positioned in a similar way to scissors, and the first clamping piece 13 and the second clamping piece 14 rotate relative to the fixed pin 15 by taking the fixed pin 15 as the center.

Referring to fig. 3 and 4, when the first clamping member 13 and the second clamping member 14 are assembled, the first angle 135 and the second angle 145 face different directions, respectively, and the first angle 135 and the second angle 145 range from 25 ° to 35 °. In this embodiment, the length direction of the first elongated hole 134 forms an angle of 30 ° with the length direction of the first connecting portion 131, and according to the trigonometric function relationship, the length of the long side is 2 times the length of the short side corresponding to the angle of 30 °, and the first elongated hole 134 is disposed at the position of the long side, which is beneficial to calculating and adjusting the length of the first elongated hole 134. When the driving pin 16 slides in the first elongated hole 134, the position of the first connecting portion 131 where the driving pin 16 is located correspondingly moves, and the first connecting portion 131 moves to drive the first clamping block 132 to rotate around the fixing pin 15 for a corresponding distance. Similarly, the length direction of the second elongated hole 144 and the length direction of the second connecting portion 141 also form an included angle of 30 °, which is beneficial to simultaneously calculating and adjusting the lengths of the first elongated hole 134 and the second elongated hole 144.

In this embodiment, the length of the first elongated hole 134 is the same as the length of the second elongated hole 144, so that the driving pin 16 can drive the first clamping block 132 and the second clamping block 142 to move by the same distance. The first angle 135 and the second angle 145 have the same value, and the lengths of the first elongated hole 134 and the second elongated hole 144 are the same, so that the distance moved between the first clamping block 132 and the second clamping block 142 and the distance moved by the driving pin 16 can be calculated, and the distances can be calculated through a trigonometric function relationship.

Preferably, when the length direction of the first elongated hole 134 forms an included angle of 30 ° with the length direction of the first connecting portion 131, the distance moved by the first clamping block 132 is 1/2 of the distance moved by the driving pin 16; when the length direction of the second elongated hole 144 and the length direction of the second connecting portion 141 also form an included angle of 30 °, the distance that the second clamping block 142 moves is 1/2 of the distance that the driving pin 16 moves. So that the sum of the distances traveled by the first clamping block 132 and the second clamping block 142 is equal to the distance traveled by the drive pin 16.

In other embodiments, the first angle 135 and the second angle 145 may be set to other angles as well.

In one embodiment, the driving pin 16 includes an integral ring portion 161 and a connecting rod 162, the connecting rod 162 is fixedly connected to the clamping pin 18, the diameter of the ring portion 161 is larger than the diameters of the first elongated hole 134 and the second elongated hole 144, and the ring portion 161 is pressed against the second clamping member 14 and the first clamping member 13.

Specifically, in the present embodiment, the first connecting portion 131 of the first clamping member 13 is a sheet, one end of the first connecting portion 131 is provided with a first through hole 133, and the other end is provided with a first elongated hole 134. The first clamping block 132 is formed to extend outwardly along one end of the first connection portion 131 where the first through hole 133 is formed.

The second connecting portion 141 of the second clamping member 14 is a sheet, one end of the second connecting portion 141 is provided with a second through hole 143, and the other end is provided with a second elongated hole 144. The second clamping block 142 is formed to extend outwardly along one end of the second connection portion 141 where the second through hole 143 is formed.

The centering clamping and positioning mechanism 1 further comprises an elastic piece 17 and a clamping pin 18, one end of the clamping pin 18 is fixedly connected with the transmission pin 16, the other end of the clamping pin is connected with the elastic piece 17, and the elastic piece 17 is elastically supported on the clamping pin 18 so that the clamping pin 18 can drive the transmission pin 16 to move.

The clamping pin 18 comprises a gasket 181 and a pin member 182, wherein one end of the pin member 182 is provided with the gasket 181, and the gasket 181 is fixedly connected with the pin member 182. The elastic member 17 is disposed through the pin member 182 and abuts against the spacer 181, so that the spacer 181 provides a supporting force to the elastic member 17. The other end of the pin member 182 is connected to the driving pin 16 such that the elastic member 17 is elastically supported between the spacer 181 and the driving pin 16.

The elastic member 17 may be a first spring 171, the first spring 171 elastically supporting the driving pin 16, the driving pin 16 converting a lateral elastic supporting force into a rotational torque force by the fixing pin 15, the rotational torque force causing the first clamping block 132 and the second clamping block 142 to simultaneously clamp the workpiece 12. At this time, the workpiece 12 is centered by the centering clamp positioning mechanism 1, and the center line of the workpiece 12 is located at the intermediate position of the first clamp block 132 and the second clamp block 142. By pressing the spacer 181 by an external force, the spacer 181 compresses the first spring 171, and the first clamping block 132 and the second clamping block 142 simultaneously unclamp the workpiece 12, at which time the workpiece 12 can be removed and replaced with another workpiece 12 for inspection.

In one embodiment, the main body 11 is provided with a first channel 111, and the first channel 111 is disposed on the main body 11 along the connecting line direction of the fixing pin 15 and the driving pin 16. The main body 11 is provided with a second channel 112, the second channel 112 is communicated with the first channel 111, the driving pin 16 penetrates through the second channel 112 and the first channel 111, the clamping pin 18 is arranged in the first channel 111 and extends to the outer side of the main body 11 from the first channel 111, and the elastic piece 17 is arranged at one end, close to the outer side of the main body 11, of the clamping pin 18.

The first channel 111 is open laterally inside the table 118 so that the clamp pin 18 can be positioned within the table 118. The second channel 112 is vertically arranged on the workbench 118, so that the transmission pin 16 can be partially arranged in the workbench 118, the structure of the centering clamping and positioning mechanism 1 is more compact, and the centering clamping and positioning mechanism 1 is beneficial to reducing the volume.

One end of the elastic piece 17 abuts against the gasket 181, the other end of the elastic piece 17 abuts against the surface of the workbench 118, and the elastic piece 17 is arranged on the outer side of the main body 11, so that replacement of the elastic piece 17 is facilitated.

In an embodiment, the first clamping member 13 and the second clamping member 14 have the same structure, and are symmetrically disposed with an axis 19 as a symmetry axis, and the axis 19 is a connection line between the fixing pin 15 and the driving pin 16.

In this embodiment, the driving pin 16 moves on the axis 19 to rotate the first clamping member 13 and the second clamping member 14 about the fixing pin 15 as a rotation center. Since the first clamping member 13 and the second clamping member 14 have the same structure, the first elongated hole 134 and the second elongated hole 144 are also symmetrical about the axis 19 as a symmetry axis, so that the rotation angles of the first clamping member 13 and the second clamping member 14 are the same. So configured, when the first clamping member 13 and the second clamping member 14 clamp the workpiece 12, the intermediate position of the workpiece 12 is at the axis 19, so that the centering clamp positioning mechanism 1 centers the workpiece 12.

Optionally, the ends of the first clamping block 132 and the second clamping block 142 contacting the workpiece 12 have protrusions, and the protrusions extend towards the inner sides of the first clamping block 132 and the second clamping block 142 and are disposed opposite to each other, so that when the workpiece 12 is clamped by the centering clamping and positioning mechanism 1, the first clamping block 132 and the second clamping block 142 are respectively contacted with the workpiece 12, which is beneficial to improving the clamping position precision of the first clamping block 132 and the second clamping block 142.

Alternatively, the end portions of the first and second clamping blocks 132 and 142 may be cylindrical in shape, and the circumferential outer surfaces of the cylindrical bodies are in contact with the workpiece 12, so that the first and second clamping blocks 132 and 142 are in line contact with the workpiece 12, respectively, to improve the accuracy of the clamping positions of the first and second clamping blocks 132 and 142. In other embodiments, the end portions of the first clamping block 132 and the second clamping block 142 may be spherical, so that the first clamping block 132 and the second clamping block 142 are respectively in point contact with the surface of the workpiece 12, so that the accuracy of the clamping positions of the first clamping block 132 and the second clamping block 142 can be further improved. In view of manufacturing cost, it is preferable to use the first clamping block 132 and the second clamping block 142 in this embodiment to have cylindrical end shapes, so as to facilitate the machining and manufacturing of the centering and clamping positioning mechanism 1.

Referring to fig. 5, in an embodiment, the centering and clamping positioning mechanism 1 further includes a detection pin 113, the detection pin 113 is movably connected to the main body 11, the detection pin 113 extends from the main body 11 toward between the first clamping block 132 and the second clamping block 142, and the detection pin 113 is used for detecting the workpiece 12.

The detection pin 113 includes a pin lever 114, an abutment piece 116, and a second spring 115. The pin 114 is inserted into the detection table 119 of the main body 11, the pin 114 extends toward the workpiece 12 through the detection table 119, and the pin 114 is movably connected with the detection table 119. The pin 114 is disposed in a plane passing through the axis 19, and the pin 114 is capable of abutting against an intermediate position of the workpiece 12 when the pin 114 is moved.

The pin 114 has a holding piece 116 at an end thereof away from the workpiece 12, and the second spring 115 is elastically supported between the holding piece 116 and the detecting table 119. When an external force is applied to one end of the pin 114 away from the workpiece 12, the second spring 115 is compressed, and the other end of the pin 114 approaches the workpiece 12 and abuts against the intermediate position of the workpiece 12, thereby detecting the deviation of both sides of the workpiece 12 from the intermediate position. When the pin 114 is released, the second spring 115 returns to its elastic deformation to support the pin 114 away from the workpiece 12. The first clamping member 13 and the second clamping member 14 are then opened so that the workpiece 12 can be removed.

The centering and clamping positioning mechanism 1 further comprises a limiting block 117, wherein the limiting block 117 is arranged opposite to the detection pin 113 and fixedly connected with the main body 11, and the limiting block 117 protrudes from the surface of the main body 11 to support the workpiece 12. The limiting block 117 is used for supporting the workpiece 12 and preventing the workpiece 12 from being moved due to overlarge propping force of the pin 114 in the detection process of the centering clamping and positioning mechanism 1. The limiting block 117 supports the workpiece 12, so that the position accuracy of the workpiece 12 on the workbench 118 is improved, and the detection accuracy of the centering clamping and positioning mechanism 1 is improved.

The above embodiments are only for illustrating the technical solution of the present application and not for limiting, and although the present application has been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A centering clamp positioning mechanism, comprising:

a main body for placing a workpiece;

the first clamping piece comprises a first connecting part and a first clamping block connected with the first connecting part, wherein the first connecting part is provided with a first through hole and a first strip hole at intervals, and the length direction of the first strip hole and the length direction of the first connecting part are arranged at a first angle;

the second clamping piece comprises a second connecting part and a second clamping block connected with the second connecting part, a second through hole and a second strip hole are formed in the second connecting part at intervals, and the length direction of the second strip hole and the length direction of the second connecting part are arranged at a second angle;

the fixing pin penetrates through the first through hole of the first clamping piece and the second through hole of the second clamping piece and is matched with the main body, so that the first clamping piece and the second clamping piece are fixed on the main body, and the first clamping block and the second clamping block are respectively positioned on two opposite sides of the workpiece;

the transmission pin passes through the first strip hole and the second strip hole simultaneously and moves along the first strip hole and the second strip hole under the pushing of external force, so that the first connecting part and the second connecting part rotate with the fixing pin as the center to drive the first clamping block and the second clamping block to open and close relative to the workpiece.

2. The centering clamp positioning mechanism of claim 1, wherein:

when the first clamping piece and the second clamping piece are assembled, the first angle and the second angle face different directions respectively, and the numerical range of the first angle and the second angle is between 25 degrees and 35 degrees.

3. The centering clamp positioning mechanism of claim 2, wherein:

the length of the first strip hole is the same as that of the second strip hole, so that the transmission pin can drive the first clamping block and the second clamping block to move by the same distance.

4. The centering clamp positioning mechanism of claim 1, wherein:

the centering clamping and positioning mechanism further comprises an elastic piece and a clamping pin, one end of the clamping pin is fixedly connected with the transmission pin, the other end of the clamping pin is connected with the elastic piece, and the elastic piece is elastically supported on the clamping pin so that the clamping pin can drive the transmission pin to move.

5. The centering clamp positioning mechanism of claim 4, wherein:

the transmission pin comprises an integrated annular part and a connecting rod, the connecting rod is fixedly connected with the clamping pin, the diameter of the annular part is larger than the aperture of the first strip-shaped hole and the aperture of the second strip-shaped hole, and the annular part is pressed against the second clamping piece and the first clamping piece.

6. The centering clamp positioning mechanism of claim 4, wherein:

the main body is provided with a first channel, and the first channel is arranged on the main body along the connecting line direction of the fixing pin and the transmission pin;

the main body is provided with a second channel, the second channel is communicated with the first channel, the transmission pin penetrates through the second channel and the first channel, the clamping pin is arranged on the first channel and extends from the first channel to the outer side of the main body, and the elastic piece is arranged at one end, close to the outer side of the main body, of the clamping pin.

7. The centering clamp positioning mechanism of claim 1, wherein:

the first clamping piece and the second clamping piece are identical in structure, and are symmetrically arranged by taking an axis as a symmetrical axis, and the axis is a connecting line of the fixing pin and the transmission pin.

8. The centering clamp positioning mechanism of claim 1, wherein:

the end parts of the first clamping block and the second clamping block are cylindrical, and the circumferential outer surfaces of the cylinders are in contact with the workpiece.

9. The centering clamp positioning mechanism of claim 1, wherein:

the centering clamping and positioning mechanism further comprises a detection pin movably connected with the main body, the detection pin extends from the main body towards the position between the first clamping block and the second clamping block, and the detection pin is used for detecting a workpiece.

10. The centering clamp positioning mechanism of claim 9, wherein:

the centering clamping and positioning mechanism further comprises a limiting block, wherein the limiting block is arranged opposite to the detection pin and fixedly connected with the main body, and the limiting block protrudes out of the surface of the main body to prop against the workpiece.