Automatic centering device for piston blank

Abstract

The present invention discloses an automatic centering device for piston blanks, which relates to the technical field of laser beam processing accessories. The device comprises a base plate, on which a steel sheet centering assembly is mounted. The steel sheet centering assembly comprises four third slide grooves, in each of which a first drive servo motor is slidably mounted. Two first drive servo motors of the same axis are rigidly connected by a movable plate, and the output end of each motor drives a clamping cam to rotate. The first elastic steel sheet and the second elastic steel sheet are respectively hinged to two sets of oppositely arranged clamping cam convex tops, and together with the two movable plates, form a quadrilateral adaptive deformation clamping area. The invention utilizes two elastic steel sheets to gradually close the piston skirt placed therebetween. Subsequently, the four clamping cams firmly clamp the piston skirt, thereby completing the centering operation of the piston skirt. The orientation of the clamping cam can be flexibly adjusted to avoid thermal expansion compensation cuts, thereby ensuring stable and reliable clamping of the piston skirt.

Description

Technical Field

[0001] The invention relates to the technical field of laser beam processing accessories, in particular to an automatic centering device for a piston blank. Background Art

[0002] In the field of contemporary diesel engine piston manufacturing, split casting combined with friction welding and laser beam processing technology has become an important process path to improve product performance. This process adopts differentiated material design: the piston head uses heat-resistant alloy to optimize mass distribution and resist high-pressure impact, and the skirt uses lightweight aluminum alloy to enable smooth sliding in the piston cylinder and reduce lateral force impact. After the rough-ground piston split component blanks are welded together by friction welding, the welds are then trimmed by a high-precision laser beam to make the welds smoother.

[0003] To cope with the thermal expansion effect under high-temperature working conditions, the piston skirt design innovatively adopts a thermal expansion compensation cutout structure. This characteristic structure is formed by laser cutting, and the cutout spacing is optimized through finite element thermodynamic simulation. It can provide a certain amount of dynamic compensation space under the working environment, effectively preventing piston sticking.

[0004] However, the above-mentioned thermal expansion compensation incision structure brings two production problems: the first is the clamping positioning problem. The traditional three / four-jaw centering device is limited by the 6-8mm clamping jaw length and cannot effectively cross the thermal expansion compensation incision with a depth of 12-15mm, resulting in clamping failure. At this time, manual secondary positioning must be performed; the second is the laser processing interference problem. Although the extended clamping jaw (12-15mm) can achieve stable clamping, its extended section will block the oil return hole processing area, causing spatial interference with the laser beam perforation path. Summary of the Invention

[0005] In order to solve the problems in the above background technology that the piston skirt is inconvenient to clamp and the clamping jaws block the laser perforation, the purpose of the present invention is to provide an automatic centering device for a piston blank.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a piston blank automatic centering device, comprising a base plate, on which a steel sheet centering assembly is mounted;

[0007] The steel sheet centering assembly includes:

[0008] Four third chutes are symmetrically arranged on the upper surface of the base plate. A first drive servo motor is slidably mounted in each third chute. Two first drive servo motors on the same axis are rigidly connected through a movable plate, and the output end of each motor drives the clamping cam to rotate.

[0009] The first elastic steel sheet and the second elastic steel sheet are respectively hinged to the convex tops of two sets of oppositely arranged clamping cams, and together with the two movable plates, they form a quadrilateral adaptive deformation clamping area; wherein the inner surface of the first elastic steel sheet is covered with a low-friction coating, and the inner surface of the second elastic steel sheet is covered with a high-friction coating;

[0010] The second slide groove is opened on the upper side of the base plate, and two groups of second sliders arranged opposite to each other are slidably assembled therein, and the second sliders are fixedly connected to the movable plate; a second mounting slot is provided at the bottom of the second slide groove, and a second lead screw with double-headed reverse threads is built in, and the second slider cooperates with both ends of the second lead screw through a thread pair.

[0011] The laser alignment module includes a laser transmitter and a receiver, which are respectively installed on the second slide block through a second hydraulic cylinder. The top end of the driving rod of the second hydraulic cylinder is fixed with the corresponding transmitter and receiver.

[0012] Preferably, the inner surface of the first elastic steel sheet is covered with a low-friction coating, and the inner surface of the second elastic steel sheet is covered with a high-friction coating. Both the first elastic steel sheet and the second elastic steel sheet are bent toward a position away from the movable plate.

[0013] Preferably, a second limiting groove is provided on the second lead screw, and a mounting groove is provided on the lower side of the base plate. A limiting tube is fixedly installed in the mounting groove, and the limiting tube is arranged in cooperation with the second lead screw.

[0014] Preferably, a position pre-adjustment component is also mounted on the base plate;

[0015] The position pre-adjustment components include:

[0016] A first slide groove is located on the upper side of the base plate. A first mounting slot is provided below the first slide groove. A first slider is slidably mounted in the first slide groove. A first lead screw is cooperatively mounted in the first mounting slot. The first slider is threadedly engaged with the first lead screw.

[0017] The plugboard is fixed on one side of the first slider, and a plug hole is provided on the base plate. The plugboard and the plug hole are slidably matched;

[0018] The first hydraulic cylinder is mounted on the inserting plate, a support rod is fixedly mounted on the piston rod of the first hydraulic cylinder, and a plurality of laser damping bases are matched and mounted on the support rod.

[0019] Preferably, a first limiting groove is provided on the first lead screw, a positioning pin hole is provided on the lower side of the base plate, a limiting block is fitted in the positioning pin hole, and the limiting block is fitted in conjunction with the first limiting groove.

[0020] Preferably, the laser damping base is in a truncated cone shape and has a porous topology structure.

[0021] Preferably, a plurality of second drive servo motors are mounted on the base plate and are respectively connected to the first lead screw and the second lead screw through couplings.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention utilizes two elastic steel sheets to progressively retract the piston skirt, guiding it to gradually align with the vertical center line. Subsequently, through the precise control of the second lead screw, the four clamping cams are synchronously driven to the horizontal center target position to complete the rigid clamping of the piston skirt. During this process, the piston skirt is precisely positioned at the geometric center of the clamping cam, and the intersection of its horizontal center line and vertical center line coincides with the piston axis, realizing a centering closed loop. It is worth noting that the clamping cam can avoid the thermal expansion compensation cutout of the piston skirt through dynamic angle adjustment during movement to ensure clamping stability. This design combines high-precision positioning and adaptive obstacle avoidance functions, significantly improving processing safety and efficiency.

[0024] 2. In the present invention, a low-friction coating is carefully applied to the inner surface of the first elastic steel sheet, while the inner surface of the second elastic steel sheet is deliberately covered with a coating with high friction performance. When the two elastic steel sheets clamp the skirt of the piston blank, the second elastic steel sheet is driven to move upward through the rotation of the two corresponding clamping cams. Thanks to the low-friction characteristics of the inner surface of the first elastic steel sheet, the piston skirt will naturally respond to this action and rotate counterclockwise. The above steps can control the rotation of the piston skirt, thereby greatly facilitating the need for the clamping cam to avoid the thermal expansion compensation cut during operation. More importantly, it effectively solves the problem in the traditional method that the long clamping jaws may block the laser beam used for perforation when clamping the piston skirt, significantly improving processing efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The figure is a basic structural diagram of an automatic centering device for a piston blank according to the present invention.

[0026] Figure 2 The present invention is a piston blank automatic centering device Figure 1 Top view of .

[0027] Figure 3 This is a structural exploded view of a position pre-adjustment assembly of an automatic centering device for a piston blank according to the present invention.

[0028] Figure 4 This is a basic structural diagram of a position pre-adjustment assembly of an automatic centering device for a piston blank of the present invention.

[0029] Figure 5 The present invention is a piston blank automatic centering device Figure 4 main view.

[0030] Figure 6 This is a basic structural diagram of a laser damping base of an automatic centering device for a piston blank of the present invention.

[0031] Figure 7 This is a thread position diagram of the second slider of the automatic centering device for a piston blank of the present invention.

[0032] Figure 8 This is a cross-sectional view of a piston skirt of an automatic centering device for a piston blank according to the present invention, buckled onto a position pre-adjusting assembly.

[0033] Figure 9 This is an exploded view of the structure of a steel sheet centering assembly of an automatic centering device for a piston blank according to the present invention.

[0034] Figure 10 This is a basic structural diagram of a steel sheet centering assembly of an automatic centering device for a piston blank according to the present invention.

[0035] Figure 11 The present invention is a piston blank automatic centering device Figure 10 main view.

[0036] Figure 12 This is a schematic diagram of the positions of the first elastic steel sheet and the second elastic steel sheet when the steel sheet centering assembly of the automatic centering device for piston blank of the present invention is waiting to place the piston skirt.

[0037] Figure 13 This is a schematic diagram of the positions of the first elastic steel sheet and the second elastic steel sheet in the third step of centering the steel sheet centering assembly of the automatic centering device for piston blanks of the present invention.

[0038] Figure 14 This is a schematic diagram of the positions of the first elastic steel sheet and the second elastic steel sheet in the fourth step of centering the steel sheet centering assembly of the automatic centering device for piston blanks of the present invention.

[0039] Figure 15 The present invention is a piston blank automatic centering device Figure 14 A schematic diagram of the positions of the first elastic steel sheet and the second elastic steel sheet.

[0040] Figure 16 This is a schematic diagram of the positions of the first elastic steel sheet and the second elastic steel sheet in the fourth step of centering the steel sheet centering assembly of the automatic centering device for piston blanks of the present invention.

[0041] Figure 17 This is a schematic diagram of the positions of the first elastic steel sheet and the second elastic steel sheet in the fifth step of centering the steel sheet centering assembly of the automatic centering device for piston blanks of the present invention.

[0042] Figure 18 A schematic diagram of the positions of the first elastic steel sheet and the second elastic steel sheet in the sixth step of centering a steel sheet centering assembly of an automatic centering device for a piston blank of the present invention.

[0043] Figure 19 This is a basic structural diagram of the sixth step of centering a steel sheet centering assembly of an automatic centering device for a piston blank according to the present invention.

[0044] Figure 20 This is a schematic diagram of the basic structure of the current split diesel piston.

[0045] Figure 21 for Figure 20 Assembly drawing.

[0046] Figure 22 for Figure 21 AA cross-sectional view.

[0047] Figure 23 Schematic diagram of the fit between the piston skirt and the short clamping claws.

[0048] Figure 24 Schematic diagram of the fit between the piston skirt and the long clamping claws.

[0049] Figure 25 This is a schematic diagram of the coordination between the short clamping jaws of the four-jaw type and the piston skirt.

[0050] Figure 26 Schematic diagram of the cooperation between the short clamping claws of the three-jaw type and the piston skirt.

[0051] In the figure: 100, base plate; 102, second drive servo motor; 200, position pre-adjustment assembly; 201, first slide; 202, first slider; 203, first mounting slot; 204, first lead screw; 2041, first limiting slot; 205, positioning pin hole; 206, limiting block; 207, socket; 208, first hydraulic cylinder; 209, support rod; 210, laser damping base; 211, plug plate; 300, steel sheet centering assembly; 301, second mounting slot; 302, second lead screw; 3021, second limiting Positioning slot; 303, second slide; 304, second slider; 305, third slide; 306, first drive servo motor; 307, moving plate; 308, clamping cam; 3091, first elastic steel sheet; 3092, second elastic steel sheet; 310, mounting slot; 311, limiting tube; 313, second hydraulic cylinder; 314, laser alignment module; 401, piston skirt; 402, piston head; 403, thermal expansion compensation notch; 404, weld; 405, piston pin hole; 406, oil return hole; 407, clamping claw. DETAILED DESCRIPTION

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 making creative efforts are within the scope of protection of the present invention.

[0053] like Figure 1 - Figure 19 As shown, the present embodiment provides a piston blank automatic centering device, comprising a base plate 100, which is coated with a low friction coating to effectively prevent the parts above it from tipping over when adjusting the position. A set of steel sheet centering components 300 (such as Figure 9 (As shown in the figure). The steel sheet centering assembly 300 is designed with four third chutes 305, symmetrically arranged on the upper surface of the base plate 100. The four third chutes 305 are divided into two groups, with the two third chutes 305 in each group arranged in parallel. Each third chute 305 is slidably mounted within a first drive servo motor 306. To ensure smooth and precise sliding, the first drive servo motor 306 is equipped with a corresponding slide rail, forming a tight sliding fit with the third chutes 305.

[0054] The two first drive servo motors 306 are rigidly connected through a sturdy moving plate 307 to ensure that the two work together. The output end of each first drive servo motor 306 drives the clamping cam 308 to rotate. The surface of the clamping cam 308 is covered with a high-friction anti-slip sleeve, which is made of high-quality nitrile rubber. This design not only increases the friction between the clamping cam 308 and the material, and plays an anti-slip role, but also prevents the clamping cam 308 from scratching the skirt of the piston blank during operation, thereby ensuring the safety and efficiency of the processing process. In this embodiment, the first drive servo motors 306 all have a braking function. This design can effectively prevent the clamping cam 308 from rotating unnecessary when clamping the material, thereby greatly improving the stability of the system.

[0055] When this embodiment is used, the contact position between the clamping cam 308 and the surface of the piston blank skirt can be adjusted by the first drive servo motor 306, which can effectively bypass the thermal expansion compensation cut 403 of the piston blank skirt, thereby accurately completing the clamping operation of the piston blank skirt, significantly reducing the risk of clamping failure, and ensuring the efficiency and accuracy of the operation.

[0056] Reference Figure 12-19As shown, in this embodiment, the first elastic steel sheet 3091 and the second elastic steel sheet 3092 are respectively hinged to the convex tops of two sets of oppositely arranged clamping cams 308. These two elastic steel sheets (i.e., the first elastic steel sheet 3091 and the second elastic steel sheet 3092) work together with the two movable plates 307 to jointly construct a quadrilateral adaptive deformation clamping area. Both elastic steel sheets are designed to bend away from the movable plates 307 to ensure flexible and adaptable clamping. It is particularly important to ensure that the minimum curvature radius of the first elastic steel sheet 3091 and the second elastic steel sheet 3092 reaches 1000R when no external force is applied before installing this embodiment. This design detail effectively prevents the two elastic steel sheets from bending in opposite directions, thereby ensuring the stability and reliability of the clamping.

[0057] Furthermore, in this embodiment, the inner surfaces of the first elastic steel sheet 3091 and the second elastic steel sheet 3092 are specially treated: the inner surface of the first elastic steel sheet 3091 is covered with a PTFE low-friction coating to reduce friction resistance; and the inner surface of the second elastic steel sheet 3092 is covered with a nitrile rubber high-friction coating to enhance friction. Figure 16 As shown, when the first and second elastic steel sheets 3091 and 3092 tightly wrap around the piston skirt, the clamping cams 308 at positions n and m rotate clockwise. During this process, if the first elastic steel sheet 3091 remains stationary, the second elastic steel sheet 3092 is pulled upward. Due to the low-friction properties of the inner surface of the first elastic steel sheet 3091, the piston skirt 401 rotates counterclockwise accordingly. This design allows for precise rotation of the piston skirt 401, further enhancing flexibility and accuracy.

[0058] The second slide 303 is provided on the upper side of the base plate 100, and two second sliders 304 are slidably mounted therein. The second sliders 304 are fixedly connected to the movable plate 307. The bottom of the second slide 303 is provided with a second mounting slot 301 (such as Figure 9 and Figure 10 As shown), the second lead screw 302 with double-head reverse threads is built in. The two second sliders 304 are threadedly matched with both ends of the second lead screw 302. A second limiting groove 3021 is provided on the second lead screw 302. A mounting groove 310 is provided on the lower side of the base plate 100, and a limiting tube 311 is fixedly installed in the mounting groove 310. The limiting tube 311 is arranged in cooperation with the second lead screw 302. When the second lead screw 302 rotates, the two second sliders 304 will translate in opposite directions, and the moving distances of the two are equal. A plurality of second drive servo motors 102 (refer to Figure 1 ), wherein a second driving servo motor 102 is connected to the second lead screw 302 through a coupling and a gear.

[0059] The second slider 304 is equipped with a laser alignment module 314, which includes a laser emitter and a receiver. The laser emitter and receiver are respectively mounted on the second slider 304 via corresponding second hydraulic cylinders 313. The top of the driving rod of the second hydraulic cylinder 313 is fixed with the corresponding emitter and receiver.

[0060] Reference Figure 20-22 Current diesel pistons are typically friction-welded together by a piston head 402 and a piston skirt 401. Lasers are then used to trim the friction weld seam 404 and pierce the oil return hole 406. A piston pin hole 405 is also defined in the piston skirt 401. In this embodiment, the height of the transmitter and receiver can be adjusted via the second hydraulic cylinder 313 to meet the production requirements of different pistons, ensuring that the laser light emitted by the laser transmitter is coaxial with the axis of the piston pin hole 405.

[0061] Reference Figure 24 Although the clamping claws 407 can clamp the piston skirt 401, they will cause spatial obstruction to the oil return hole 406 to be laser-perforated in the next step.

[0062] Reference Figure 23 、 Figure 25 and Figure 26 Due to the thermal expansion compensation notch 403 on the lower side of the piston skirt 401, two of the four clamping claws 407 cannot clamp the piston skirt 401 (e.g. Figure 26 As shown, even one of the three clamping claws 407 cannot clamp the piston skirt 401). Figure 25 and Figure 26 The length of the clamping claw 407 is as follows Figure 23 length.

[0063] The steps for centering the steel sheet centering assembly 300 are as follows:

[0064] The first step is to adjust the shape of the first elastic steel sheet 3091 and the second elastic steel sheet 3092 before placing the piston skirt 401 on the base plate 100 to ensure that they are as Figure 12 As shown, the area of the quadrilateral adaptive deformation clamping region is maximized, thereby facilitating the placement of the piston skirt 401.

[0065] In the second step, after the piston skirt 401 is securely placed on the substrate 100, the first drive servo motor 306 is immediately started to precisely control the four clamping cams 308 to Figure 13 The state shown ensures that the convex tops of the clamping cams 308 are opposite to each other in pairs, preparing for the subsequent deformation clamping.

[0066] In the third step, the two movable plates 307 are directed to move smoothly in opposite directions by the corresponding second driving servo motor 102. This action will cause the quadrilateral adaptive deformation clamping area between the first elastic steel sheet 3091 and the second elastic steel sheet 3092 to gradually become narrower and longer (see Figure 14 ), during this deformation process, the center line of the piston skirt 401 will be effectively stretched to coincide with the vertical center line Y on the base plate 100, achieving preliminary centering.

[0067] The fourth step is to maintain the position of the first elastic steel sheet 3091 fixed, and then manipulate the corresponding two clamping cams 308 to rotate. This rotation will drive the second elastic steel sheet 3092 to rise. Thanks to the low friction characteristics of the inner surface of the first elastic steel sheet 3091, the piston skirt 401 will rotate counterclockwise accordingly (refer to Figure 16 ), and further approach the exact position.

[0068] Step 5: Once the receiver of the laser alignment module 314 successfully receives the signal from the transmitter, the corresponding control mechanism is immediately activated to rotate the four clamping cams 308 to a state where they are no longer in contact with the piston skirt 401 (e.g. Figure 17 As shown), although the piston skirt 401 may still be slightly tilted at this time, the conditions for the clamping operation have been met. At this time, the third step can be repeated several times to ensure that the piston skirt 401 is completely positioned on the vertical center line Y.

[0069] In the sixth step, the positions of the four clamping cams 308 are adjusted again so that they are all facing the piston skirt 401. Subsequently, the two movable plates 307 are driven by the second drive servo motor 102 to gradually move closer to the center of the base plate 100. When the clamping cams 308 tightly clamp the piston skirt 401, the piston skirt 401 will be accurately positioned on the horizontal center line X. Since the piston skirt 401 has been accurately positioned on the vertical center line Y in the third step, the intersection O of the horizontal center line X and the vertical center line Y will accurately fall on the axis of the piston skirt 401, indicating that the centering operation of the piston skirt 401 is successfully completed (refer to Figure 18 ).

[0070] A position pre-adjustment component 200 is also mounted on the base plate 100 .

[0071] Reference Figure 2-Figure 6The position pre-adjustment component 200 includes a first slide 201, which is provided on the upper side of the base plate 100. A first mounting slot 203 is provided below the first slide 201. A first slider 202 is slidably installed in the first slide 201. A first lead screw 204 is installed in the first mounting slot 203. The first slider 202 is threadedly engaged with the first lead screw 204. The insert plate 211 is fixed to one side of the first slider 202. A plurality of second drive servo motors 102 (see FIG. 1 ) are installed on the base plate 100. Figure 1 ), wherein a second driving servo motor 102 is connected to the first lead screw 204 through a coupling and a gear.

[0072] The base plate 100 is provided with a socket 207, and the plug plate 211 is provided to slide in cooperation with the socket 207. The first hydraulic cylinder 208 is mounted on the plug plate 211, and a support rod 209 is fixedly mounted on the piston rod of the first hydraulic cylinder 208. A plurality of laser damping bases 210 are mounted on the support rod 209. In this embodiment, the first hydraulic cylinder 208 can be controlled by the second drive servo motor 102 to move linearly, thereby causing the support rod 209 and the laser damping base 210 to move linearly horizontally (in the fourth step of centering the steel sheet centering assembly 300, it should be ensured that the intersection o of the horizontal center line X and the vertical center line Y does not contact the support rod 209) (refer to Figure 18 ), the support rod 209 can play a stabilizing role on the one hand, preventing the piston skirt 401 from tipping over, and on the other hand, the linear movement of the support rod 209 can pull the piston skirt 401 buckled above it to move a certain amount, such as when the steel sheet centering assembly 300 performs the third step of centering (refer to Figure 14 ), the support rod 209 can move back and forth, and each movement distance is smaller than the previous one. At this time, the piston skirt 401 will also be close to the vertical center line Y.

[0073] A first limiting groove 2041 is defined on the first lead screw 204 , a positioning pin hole 205 is defined on the lower side of the base plate 100 , a limiting block 206 is fitted in the positioning pin hole 205 , and the limiting block 206 is fitted in conjunction with the first limiting groove 2041 .

[0074] The laser damping base 210 is in the shape of a truncated cone and has a porous topological structure (e.g. Figure 6 shown), refer to Figure 8 After the centering of the piston skirt 401 is completed, when the predetermined position of the oil return hole 406 is punched by laser, the laser damping base 210 can block and absorb the laser to prevent the laser from continuing to act on the inner wall of the piston skirt 401, further reducing the defective rate.

[0075] It should be further noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0076] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A piston blank automatic centering device, characterized in that: It comprises a base plate (100), on which a steel sheet centering assembly (300) is mounted; The steel sheet centering assembly (300) comprises: Four third chutes (305) are symmetrically arranged on the upper surface of the base plate (100), and a first driving servo motor (306) is slidably mounted in each third chute (305). Two first driving servo motors (306) in the same axial direction are rigidly connected via a movable plate (307), and the output end of each motor drives the clamping cam (308) to rotate; The first elastic steel sheet (3091) and the second elastic steel sheet (3092) are respectively hinged to the convex tops of two sets of oppositely arranged clamping cams (308), and together with the two movable plates (307) enclose a quadrilateral adaptive deformation clamping area; The second slide groove (303) is provided on the upper side of the base plate (100), and two second sliders (304) are slidably mounted therein, and the second sliders (304) are fixedly connected to the movable plate (307); a second mounting slot (301) is provided at the bottom of the second slide groove (303), and a second lead screw (302) with double-ended reverse threads is built in, and both ends of the two second sliders (304) are threadedly engaged with the second lead screw (302); The laser alignment module (314) includes a laser transmitter and a receiver, which are respectively mounted on the second slider (304) via a second hydraulic cylinder (313), and the top end of the driving rod of the second hydraulic cylinder (313) is fixed with the corresponding transmitter and receiver.

2. The automatic centering device for piston blank according to claim 1, characterized in that: The inner surface of the first elastic steel sheet (3091) is covered with a low-friction coating, and the inner surface of the second elastic steel sheet (3092) is covered with a high-friction coating. Both the first elastic steel sheet (3091) and the second elastic steel sheet (3092) are bent toward a position away from the movable plate (307).

3. The automatic centering device for piston blank according to claim 2, characterized in that: A second limiting groove (3021) is provided on the second lead screw (302), and a mounting groove (310) is provided on the lower side of the base plate (100). A limiting tube (311) is fixedly installed in the mounting groove (310), and the limiting tube (311) is arranged in cooperation with the second lead screw (302).

4. The automatic centering device for piston blank according to claim 1, characterized in that: A position pre-adjustment component (200) is also mounted on the base plate (100); The position pre-adjustment component (200) comprises: A first slide groove (201), the first slide groove (201) is located on the upper side of the base plate (100), a first installation slot (203) is further provided below the first slide groove (201), a first slider (202) is slidably installed in the first slide groove (201), a first lead screw (204) is cooperatively installed in the first installation slot (203), and the first slider (202) is threadedly engaged with the first lead screw (204); An inserting plate (211), the inserting plate (211) is fixed to one side of the first slider (202), a plug hole (207) is provided on the base plate (100), and the inserting plate (211) and the plug hole (207) are slidably matched; A first hydraulic cylinder (208) is mounted on the insert plate (211), a support rod (209) is fixedly mounted on the piston rod of the first hydraulic cylinder (208), and a plurality of laser damping bases (210) are mounted on the support rod (209).

5. The automatic centering device for piston blank according to claim 4, characterized in that: A first limiting groove (2041) is provided on the first lead screw (204), a positioning pin hole (205) is provided on the lower side of the base plate (100), a limiting block (206) is installed in the positioning pin hole (205), and the limiting block (206) is arranged in cooperation with the first limiting groove (2041).

6. The automatic centering device for piston blank according to claim 4, characterized in that: The laser damping base (210) is in a truncated cone shape and has a porous topological structure.

7. The automatic centering device for piston blank according to claim 4, characterized in that: A plurality of second drive servo motors (102) are mounted on the base plate (100) and are respectively connected to the first lead screw (204) and the second lead screw (302) via couplings.

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