Caliper piston coaxiality detection equipment and control method thereof

Abstract

The invention discloses coaxiality detection equipment for a caliper piston, and belongs to the technical field of piston detection. The clamping device is arranged on the workbench, and the clamping device is used for clamping a workpiece; the detection device is arranged on the workbench, the detection device is used for detecting a workpiece, and the detection device comprises an inner side detection end and an outer side detection end; wherein the inner side detection end and the outer side detection end are both provided with a plurality of sensors, and the sensors are used for detecting the distance between the sensors and the corresponding position of a workpiece. According to the invention, coaxiality detection can be carried out on the welded caliper piston with an inner and outer double-layer structure, and the product quality is ensured.

Description

Technical Field

[0001] The present application belongs to the field of piston detection technology, and in particular relates to a coaxiality detection device for a caliper piston and a control method thereof. Background Art

[0002] A brake piston is typically displaceably housed within a cylindrical bore. For fluid-actuated brakes, this bore typically forms a fluid cylinder and a pressure chamber that can be loaded with pressurized fluid. Thus, by pressurizing the pressure chamber, the brake piston can be moved in the direction of the brake pad, which is thereby pressed against the associated brake disc and brakes it. The pressurized fluid is typically a hydraulic fluid, so in this case, the brake piston can be described as hydraulically actuated.

[0003] The existing Chinese patent with publication number CN116066488A discloses a brake piston having a first tubular piston body portion and a second tubular piston body portion radially arranged within a first piston body portion, wherein both portions extend along the longitudinal axis of the piston. The first piston body portion and the second piston body portion are connected together via an annular end wall at the first axial end of the brake piston, so that an annular cavity is formed between the first piston body portion and the second piston body portion. At the second axial end of the brake piston, the second piston body portion is closed by a bottom plate, so that the second piston body portion forms a receiving portion. The first piston body portion has a bottom plate area pointing radially inward. The end wall is axially stepped toward the outside and has a radially outer portion and a radially inner portion, each portion having an end face axially away from the brake piston, wherein the end face of the radially inner portion is axially offset relative to the end face of the radially outer portion in the direction toward the second axial end of the brake piston.

[0004] The above-mentioned piston has a double-layer structure and can be controlled by hydraulic and motor drive at the same time. The double-layer structure of the piston is connected by welding. During the installation process, it is necessary to ensure that the inner and outer layers of the piston have high coaxiality. Therefore, coaxiality testing is required after welding, and improvements are made to this. Summary of the Invention

[0005] The purpose of this application is to address the above-mentioned technical problems and provide a caliper piston coaxiality detection device and its control method, which can perform coaxiality detection on the welded inner and outer double-layer structure caliper piston to ensure product quality.

[0006] The present application provides a caliper piston coaxiality detection device, comprising: Workbench; A clamping device is placed on the workbench, and is used to clamp the workpiece; A detection device is placed on the workbench, and is used to detect the workpiece. The detection device includes an inner detection end and an outer detection end; Wherein, the inner detection end and the outer detection end are both provided with a plurality of sensors, and the sensors are used to detect the distance between the corresponding positions of the workpiece.

[0007] The clamping device and the detection device are both installed on the workbench. The clamping device is used to clamp the piston, and then the inner and outer sides of the piston are detected by the detection device. The inner and outer detection ends use infrared sensors for high-precision distance measurement. The detection result data is analyzed to calculate the coaxiality of the inner and outer sides of the piston.

[0008] Furthermore, the clamping device includes: A placement seat, movable along the axial direction and placed at the bottom of the clamping device, wherein the placement seat is connected to the driving device; A plurality of clamping seats are provided and are placed on the clamping device, wherein the clamping seats correspond to the piston ring grooves of the caliper piston; The first electromagnet is respectively placed between the clamping seat and the clamping device.

[0009] The caliper piston workpiece is first placed on the placement seat, and then the clamping seat is controlled to move by the first electromagnet. The workpiece is clamped by the clamping seat to improve the detection stability of the detection device. The first electromagnet is connected to the power supply, and by controlling the power-on state, the first electromagnet is controlled to produce mutual attraction or mutual repulsion to realize the movement control of the clamping seat. The placement seat is driven and controlled by a driving device such as a motor screw or a cylinder.

[0010] Furthermore, the clamping seat includes: There are two clamping blocks, wherein the upper clamping block is fixedly connected to the clamping seat, and the lower clamping block is movably connected to the clamping seat; second electromagnets, respectively disposed on the two clamping blocks and corresponding to each other; Sliding sleeve, mounted on the clamping block on the lower side; A sliding post is mounted on the upper clamping block, and is slidably connected to the sliding sleeve; A first spring is sleeved on the sliding column and acts to move the two clamping blocks closer to each other; Wherein, the clamping block is provided with an arc-shaped abutting surface.

[0011] The clamping block is installed on the clamping seat. The clamping block abuts against the workpiece through the arc-shaped abutting surface and abuts against the piston ring groove. The movement of the movable clamping block is controlled by the second electromagnet, so that the two clamping blocks can abut against the two side walls of the piston ring groove respectively. The sliding sleeve and the sliding column are respectively installed on the two corresponding clamping blocks. The sliding sleeve and the sliding column improve the stability of the movable clamping block during movement. The first spring acts on the clamping block, so that the two movable blocks tend to approach each other. The two clamping blocks correspond to the two side walls of the piston ring groove respectively, so as to improve the accuracy and stability of the piston clamping.

[0012] Furthermore, the clamping device further comprises: A limiting member, movably placed on the clamping device; a second spring, disposed between the limiting member and the clamping device; The third electromagnet is respectively placed on the limiting member and the clamping device and corresponds to each other.

[0013] The clamping seat is provided with a limiting groove that cooperates with the limiting piece. The limiting piece limits the clamping seat from continuing to move toward the workpiece, so that the clamping block can limit the movement of the workpiece in the axial direction, but the workpiece can move in the circumferential direction. When the limiting piece moves and contracts under the action of the third electromagnet, the clamping block continues to move toward the workpiece under the action of the second electromagnet to clamp the workpiece. The limiting piece is controlled by the second spring to have a tendency to move toward the clamping seat. When the clamping block moves from an unclamped state to a clamped state, it is restricted by the limiting piece, which facilitates other adjustments.

[0014] Furthermore, the detection device further includes: The cylinder is placed on the detection device, and the outer detection end is placed on the cylinder; The rod body is placed on the detection device, and the inner detection end is placed on the rod body; A moving device, used for controlling the detection device to move in horizontal and vertical directions; The cylinder and the rod have the same axis, and the cylinder is connected to the rod.

[0015] The inner diameter of the cylinder is larger than the outer diameter of the thickness, so that the piston can enter the cylinder. The outer detection end is installed on the inner wall of the cylinder, and the inner detection end is installed on the outer wall of the rod, corresponding to the detection of the outer and inner sides of the piston respectively. The moving device adopts two sets of vertically intersecting screws, motors and other components to control the movement and adjustment of the cylinder in the horizontal direction, and adopts cylinders, hydraulic cylinders and other driving rods to control the movement and adjustment of the cylinder in the vertical direction. The cylinder and the rod are integrally connected or installed.

[0016] Furthermore, the detection device further includes: An abutment seat, movably disposed in the cylinder; A hinged member, wherein two hinged members are hingedly arranged into a group, and a plurality of groups are placed between the abutment seat and the cylinder and are evenly distributed around the axis of the cylinder; The third spring is placed between the abutting seat and the cylinder body and is sleeved on the rod body.

[0017] At least three groups of hinges are provided, and the hinges are respectively hinged to the abutment seat and the cylinder body to improve the stability of the abutment seat when moving, and the abutment seat is abutted against the upper end face of the piston, and the abutment seat ensures that the piston axis is parallel to the direction of gravity, thereby ensuring the detection accuracy of the outer detection end and the inner detection end, and the hinge member improves the structure of the abutment seat so that the abutment seat moves along the axis direction when moving, and the abutment seat is acted on by the third spring so that the abutment seat has a tendency to move toward the workpiece direction, and the stability of the abutment seat and the workpiece when abutting is improved by the third spring, and after the abutment seat abuts the workpiece, the limit member is controlled to contract to realize the clamping block to clamp the workpiece, and after the clamping is completed, the abutment seat is separated from the workpiece, and then the outer side surface of the workpiece is detected by the outer detection end, and the axis position is calculated, and then the axis of the cylinder is adjusted to be the same as the outer axis of the workpiece by the moving device, and then the workpiece is continued to be abutted against the abutment seat, and the inner and outer sides of the piston are continued to be detected by the outer detection end and the inner detection end.

[0018] Furthermore, the detection device further includes: A mounting seat, movably mounted on the cylinder, wherein the mounting seat and the cylinder are connected via a driving device; The inner detection end and the outer detection end are both connected to the mounting seat, the cylinder is provided with a first sliding groove for the outer detection end to move, and the rod is provided with a second sliding groove for the inner detection end to move.

[0019] The mounting seat is movably connected to the cylinder. By controlling the relative movement between the mounting seat and the cylinder, the inner detection end and the outer detection end are controlled to move along the axial direction of the cylinder. At the same time, the different heights of the inner and outer side walls of the piston are detected, further improving the accuracy of the final detection results.

[0020] The present application also provides a method for controlling a caliper piston coaxiality detection device, the specific steps of which include: S1, place the caliper piston workpiece on the placement seat of the clamping device, move the clamping seat into the piston ring groove and be restricted by the limiter, move the placement seat downward to separate it from the workpiece, and place the upper side wall of the piston ring groove on the clamping block on the upper side of the clamping seat; S2, the detection device is controlled to move toward the workpiece through the moving device, so that the abutment seat abuts against the workpiece, and then the two clamping blocks are controlled to separate from each other, so that the clamping blocks abut against the two side walls of the piston ring groove, and the limiter is controlled to move and contract, so that the clamping seat continues to move into the piston ring groove, and the workpiece is clamped by the clamping blocks and the clamping seat; S3, detecting through the outer detection end, analyzing and calculating the detection data, and then separating the detection device from the workpiece through the control of the moving device, and adjusting the detection device in a horizontal position through the control of the moving device so that the axis of the cylinder is aligned with the axis of the outer side of the piston; S4, continue to control the detection device to move toward the workpiece through the moving device, so that the abutment seat and the workpiece are in contact, and at the same time, detection is performed through the outer detection end and the inner detection end. At the same time, the mounting seat is controlled to rise and fall to detect the coaxiality of the piston at different heights. The detection results are analyzed and calculated to obtain the coaxiality of the inner and outer layers of the caliper piston.

[0021] The inner and outer side walls of the piston are inspected by the detection device to realize the coaxiality detection of the inner and outer layers of the piston after welding to ensure the welding quality.

[0022] The beneficial effects of this application are: 1. The caliper piston workpiece is first placed on the placement seat, and then the clamping seat is controlled to move by the first electromagnet to clamp the workpiece through the clamping seat to improve the detection stability of the detection device.

[0023] 2. The two clamping blocks correspond to the two side walls of the piston ring groove respectively, further improving the accuracy and stability of piston clamping.

[0024] 3. The inner and outer side walls of the piston are inspected by the detection device, with high detection accuracy.

[0025] 4. The abutment seat is abutted against the upper end surface of the workpiece to ensure that the piston axis is parallel to the direction of gravity, thereby ensuring the detection accuracy of the outer detection end and the inner detection end. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 An isometric view of the detection device of the present application; Figure 2 This is a schematic diagram of the structure of the detection equipment of this application; Figure 3 For this application Figure 2 A magnified view of point A; Figure 4 For this application Figure 2 An enlarged view of point B; Reference numerals in the figure are: 100, workbench; 200, clamping device; 210, placement seat; 220, clamping seat; 221, clamping block; 222, second electromagnet; 223, sliding sleeve; 224, sliding column; 225, first spring; 230, first electromagnet; 240, limit member; 241, second spring; 242, third electromagnet; 300, detection device; 310, inner detection end; 320, outer detection end; 330, cylinder; 331, first slide groove; 340, rod; 341, second slide groove; 350, moving device; 360, abutment seat; 361, hinge; 362, third spring; 370, mounting seat. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0028] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0029] The following provides a detailed description of the embodiments of the present application through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0030] Example 1: like Figures 1-4 As shown, an embodiment of the present application provides a caliper piston coaxiality detection device, comprising: Workbench 100; A clamping device 200 is placed on the workbench 100 and is used to clamp a workpiece; A detection device 300 is placed on the workbench 100 and is used to detect a workpiece. The detection device 300 includes an inner detection end 310 and an outer detection end 320 . The inner detection end 310 and the outer detection end 320 are both provided with a plurality of sensors, and the sensors are used to detect the distance between the corresponding positions of the workpiece.

[0031] The clamping device 200 and the detection device 300 are both installed on the workbench 100. The clamping device 200 is used to clamp the piston, and then the inner and outer sides of the piston are detected by the detection device 300. The inner detection end 310 and the outer detection end 320 use infrared sensors for high-precision distance measurement. The detection result data is analyzed to calculate the coaxiality of the inner and outer sides of the piston.

[0032] Example 2: like Figure 2 、 Figure 3 As shown, the embodiment of the present application provides a coaxiality detection device for a caliper piston. In addition to the above technical features, the clamping device 200 further includes: A placement seat 210 is movable along the axis and is placed at the bottom of the clamping device 200 , wherein the placement seat 210 is connected to the driving device; A plurality of clamping seats 220 are provided and are placed on the clamping device 200 , wherein the clamping seats 220 correspond to the piston ring grooves of the caliper pistons; The first electromagnet 230 is disposed between the clamping seat 220 and the clamping device 200 .

[0033] The caliper piston workpiece is first placed on the placement seat 210, and then the clamping seat 220 is controlled to move by the first electromagnet 230. The workpiece is clamped by the clamping seat 220 to improve the detection stability of the detection device 300. The first electromagnet 230 is connected to the power supply. By controlling the power-on state, the first electromagnet 230 is controlled to produce mutual attraction or mutual repulsion to realize the movement control of the clamping seat 220. The placement seat 210 is driven and controlled by a driving device such as a motor screw or a cylinder.

[0034] Furthermore, the clamping seat 220 includes: There are two clamping blocks 221, wherein the upper clamping block 221 is fixedly connected to the clamping seat 220, and the lower clamping block 221 is movably connected to the clamping seat 220; The second electromagnets 222 are respectively placed on the two clamping blocks 221 and correspond to each other; The sliding sleeve 223 is mounted on the lower clamping block 221; A sliding post 224 is mounted on the upper clamping block 221 and is slidably connected to the sliding sleeve 223; The first spring 225 is sleeved on the sliding post 224 and acts on the two clamping blocks 221 to move closer to each other; The clamping block 221 is provided with an arc-shaped abutting surface.

[0035] The clamping block 221 is installed on the clamping seat 220. The clamping block 221 is abutted against the workpiece through the arc-shaped abutting surface and abutted in the piston ring groove. The movement of the movable clamping block 221 is controlled by the second electromagnet 222, so that the two clamping blocks 221 can be respectively abutted against the two side walls of the piston ring groove. The sliding sleeve 223 and the sliding column 224 are respectively installed on the two corresponding clamping blocks 221. The sliding sleeve 223 and the sliding column 224 are used to improve the stability of the movable clamping block 221 during movement. The first spring 225 acts on the clamping block 221, so that the two movable blocks tend to approach each other. The two clamping blocks 221 correspond to the two side walls of the piston ring groove respectively, thereby improving the accuracy and stability of the piston clamping.

[0036] Furthermore, the clamping device 200 further includes: The limiting member 240 is movably placed on the clamping device 200; The second spring 241 is placed between the limiting member 240 and the clamping device 200; The third electromagnet 242 is respectively disposed on the limiting member 240 and the clamping device 200 and corresponds to each other.

[0037] The clamping seat 220 is provided with a limiting groove that cooperates with the limiting member 240. The limiting member 240 limits the clamping seat 220 from continuing to move toward the workpiece, so that the clamping block 221 can limit the workpiece from moving in the axial direction, but the workpiece can move in the circumferential direction. When the limiting member 240 moves and contracts under the action of the third electromagnet 242, the clamping block 221 continues to move toward the workpiece under the action of the second electromagnet 222, thereby clamping the workpiece. The limiting member 240 is controlled by the second spring 241 to have a tendency to move toward the clamping seat 220. When the clamping block 221 moves from an unclamped state to a clamped state, the limitation of the limiting member 240 facilitates other adjustments.

[0038] Example 3: like Figure 2 、 Figure 4 As shown, the embodiment of the present application provides a caliper piston coaxiality detection device. In addition to the above technical features, the detection device 300 further includes: The cylinder 330 is placed on the detection device 300, and the outer detection end 320 is placed on the cylinder 330; The rod body 340 is placed on the detection device 300, and the inner detection end 310 is placed on the rod body 340; The moving device 350 is used to control the detection device 300 to move in the horizontal direction and the vertical direction; The cylinder 330 and the rod 340 have the same axis, and the cylinder 330 is connected to the rod 340 .

[0039] The inner diameter of the cylinder 330 is larger than the outer diameter of the thickness, so that the piston can enter the cylinder 330. The outer detection end 320 is installed on the inner wall of the cylinder 330, and the inner detection end 310 is installed on the outer wall of the rod body 340, corresponding to the detection of the outer and inner sides of the piston respectively. The moving device 350 uses two sets of vertically intersecting screws, motors and other components to control the horizontal movement and adjustment of the cylinder 330, and uses a cylinder, hydraulic cylinder or the like to drive the rod body 340 to control the vertical movement and adjustment of the cylinder 330. The cylinder 330 and the rod body 340 are integrally connected or installed.

[0040] Furthermore, the detection device 300 further includes: The abutment seat 360 is movably disposed in the cylinder 330; The hinge members 361 are hingedly connected to form a group of two hinge members 361, and several groups are placed between the abutment seat 360 and the cylinder 330 and are evenly distributed around the axis of the cylinder 330; The third spring 362 is disposed between the abutting seat 360 and the cylinder 330 , and is sleeved on the rod 340 .

[0041] At least three groups of hinges 361 are provided, and the hinges 361 are hinged to the abutment seat 360 and the cylinder 330 respectively, so as to improve the stability of the abutment seat 360 when it moves. The abutment seat 360 abuts against the upper end face of the piston, and the abutment seat 360 ensures that the piston axis is parallel to the direction of gravity, thereby ensuring the detection accuracy of the outer detection end 320 and the inner detection end 310. The hinge 361 improves the stability of the abutment seat 360, so that the abutment seat 360 moves along the axial direction when it moves. The third spring 362 acts on the abutment seat 360, so that the abutment seat 360 has a tendency to move toward the workpiece. The third spring 362 is used to improve the stability of the abutment seat 360 when it abuts against the workpiece. After the abutment seat 360 abuts against the workpiece, the limit member 240 is controlled to contract, so that the clamping block 221 clamps the workpiece. After clamping is completed, the abutment seat 360 is separated from the workpiece, and then the outer side surface of the workpiece is detected by the outer detection end 320, and the axis position is calculated. Then, the axis of the cylinder 330 is adjusted to be the same as the outer axis of the workpiece through the moving device 350, and then the workpiece continues to be abutted against the abutment seat 360, and the inner and outer side surfaces of the piston continue to be detected through the outer detection end 320 and the inner detection end 310.

[0042] Furthermore, the detection device 300 further includes: The mounting base 370 is movably mounted on the cylinder 330, and the mounting base 370 and the cylinder 330 are connected via a driving device; The inner detection end 310 and the outer detection end 320 are both installed and connected to the mounting seat 370 , the cylinder 330 is provided with a first slide groove 331 for the outer detection end 320 to move, and the rod body 340 is provided with a second slide groove 341 for the inner detection end 310 to move.

[0043] The mounting seat 370 is movably connected to the cylinder 330. By controlling the relative movement between the mounting seat 370 and the cylinder 330, the inner detection end 310 and the outer detection end 320 are controlled to move along the axial direction of the cylinder 330. At the same time, the different heights of the inner and outer side walls of the piston are detected, thereby further improving the accuracy of the final detection result.

[0044] Example 4: The present application also provides a method for controlling a caliper piston coaxiality detection device, the specific steps of which include: S1, place the caliper piston workpiece on the placement seat 210 of the clamping device 200, and move the clamping seat 220 into the piston ring groove and be restricted by the limiter 240. Move the placement seat 210 downward to separate it from the workpiece, so that the upper side wall of the piston ring groove is placed on the clamping block 221 on the upper side of the clamping seat 220; S2, the detection device 300 is controlled by the moving device 350 to move toward the workpiece, so that the abutment seat 360 abuts against the workpiece, and then the two clamping blocks 221 are controlled to separate from each other, so that the clamping blocks 221 abut against the two side walls of the piston ring groove, and the limit member 240 is controlled to move and contract, so that the clamping seat 220 continues to move into the piston ring groove, and the workpiece is clamped by the clamping blocks 221 and the clamping seat 220; S3, performing detection through the outer detection end 320, analyzing and calculating the detection data, and then controlling the detection device 300 to separate from the workpiece through the moving device 350, and controlling the detection device 300 to adjust its horizontal position through the moving device 350 so that the axis of the cylinder 330 is aligned with the axis of the outer side of the piston; S4, continue to control the detection device 300 to move toward the workpiece through the moving device 350, so that the abutment seat 360 abuts against the workpiece, and at the same time perform detection through the outer detection end 320 and the inner detection end 310, and at the same time control the lifting and lowering of the mounting seat 370 to detect the coaxiality of the piston at different heights, analyze and calculate the detection results, and obtain the coaxiality of the inner and outer layers of the caliper piston.

[0045] The inner and outer side walls of the piston are inspected by the inspection device 300 to realize the coaxiality inspection of the inner and outer layers of the piston after welding, thereby ensuring the welding quality.

[0046] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0047] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A caliper piston coaxiality detection device, characterized in that: include: Workbench (100); A clamping device (200) is placed on the workbench (100), and the clamping device (200) is used to clamp a workpiece; A detection device (300) is placed on the workbench (100), the detection device (300) is used to detect a workpiece, and the detection device (300) includes an inner detection end (310) and an outer detection end (320); The inner detection end (310) and the outer detection end (320) are both provided with a plurality of sensors, and the sensors are used to detect the distance between the corresponding positions of the workpiece.

2. The caliper piston coaxiality detection device according to claim 1, characterized in that: The clamping device (200) comprises: A placement seat (210) capable of moving along the axial direction and placed at the bottom of the clamping device (200), wherein the placement seat (210) is connected to the driving device; A plurality of clamping seats (220) are provided and are placed on the clamping device (200), wherein the clamping seats (220) correspond to the piston ring groove of the caliper piston; The first electromagnet (230) is respectively placed between the clamping seat (220) and the clamping device (200).

3. The caliper piston coaxiality detection device according to claim 2, characterized in that: The clamping seat (220) comprises: Two clamping blocks (221) are provided, wherein the upper clamping block (221) is fixedly connected to the clamping seat (220), and the lower clamping block (221) is movably connected to the clamping seat (220); Second electromagnets (222) are respectively placed on the two clamping blocks (221) and correspond to each other; A sliding sleeve (223) is mounted on the lower clamping block (221); A sliding post (224) is mounted on the upper clamping block (221), wherein the sliding post (224) is slidably connected to the sliding sleeve (223); A first spring (225) is sleeved on the sliding post (224) and acts on the two clamping blocks (221) to move closer to each other; Wherein, the clamping block (221) is provided with an arc-shaped abutting surface.

4. The caliper piston coaxiality detection device according to claim 3, characterized in that: The clamping device (200) further comprises: A limiting member (240) is movably placed on the clamping device (200); A second spring (241) is disposed between the limiting member (240) and the clamping device (200); The third electromagnet (242) is respectively placed on the limiting member (240) and the clamping device (200) and corresponds to each other.

5. The caliper piston coaxiality detection device according to claim 4, characterized in that: The detection device (300) further includes: The cylinder (330) is placed on the detection device (300), and the outer detection end (320) is placed on the cylinder (330); The rod body (340) is placed on the detection device (300), and the inner detection end (310) is placed on the rod body (340); A moving device (350) is used to control the detection device (300) to move in the horizontal direction and the vertical direction; The cylinder (330) and the rod (340) have the same axis, and the cylinder (330) is connected to the rod (340).

6. The caliper piston coaxiality detection device according to claim 5, characterized in that: The detection device (300) further includes: An abutment seat (360) is movably disposed in the cylinder (330); A hinge member (361), wherein two hinge members (361) are hingedly connected to form a group, and a plurality of groups are placed between the abutment seat (360) and the cylinder (330) and are evenly distributed around the axis of the cylinder (330); The third spring (362) is placed between the abutment seat (360) and the cylinder (330), and is sleeved on the rod (340).

7. The caliper piston coaxiality detection device according to claim 6, characterized in that: The detection device (300) further includes: A mounting seat (370) is movably mounted on the cylinder (330), wherein the mounting seat (370) and the cylinder (330) are connected via a driving device; The inner detection end (310) and the outer detection end (320) are both mounted and connected to the mounting seat (370), the cylinder (330) is provided with a first sliding groove (331) for the outer detection end (320) to move, and the rod (340) is provided with a second sliding groove (341) for the inner detection end (310) to move.

8. A control method for the caliper piston coaxiality detection device according to claim 7, characterized in that: The specific steps include: S1, placing the caliper piston workpiece on the placement seat (210) of the clamping device (200), moving the clamping seat (220) into the piston ring groove and being limited by the limit member (240), moving the placement seat (210) downward to separate it from the workpiece, and placing the upper side wall of the piston ring groove on the clamping block (221) on the upper side of the clamping seat (220); S2, controlling the detection device (300) to move toward the workpiece by the moving device (350), so that the abutting seat (360) abuts against the workpiece, and then controlling the two clamping blocks (221) to separate from each other, so that the clamping blocks (221) abut against the two side walls of the piston ring groove, controlling the limiter (240) to move and contract, so that the clamping seat (220) continues to move into the piston ring groove, and clamping the workpiece by the clamping blocks (221) and the clamping seat (220); S3, performing detection through the outer detection end (320), analyzing and calculating the detection data, and then controlling the detection device (300) to separate from the workpiece through the moving device (350), and controlling the detection device (300) to adjust the horizontal position through the moving device (350) so that the axis of the cylinder (330) is aligned with the axis of the outer side surface of the piston; S4, continue to control the detection device (300) to move toward the workpiece through the moving device (350), so that the abutment seat (360) abuts against the workpiece, and at the same time, perform detection through the outer detection end (320) and the inner detection end (310), and at the same time control the mounting seat (370) to rise and fall to detect the coaxiality of the piston at different heights, analyze and calculate the detection results, and obtain the coaxiality of the inner and outer layers of the caliper piston.

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