Composite machining and forming device for surface strengthening coating of hydraulic oil cylinder

Abstract

The invention relates to the technical field of composite machining forming devices, in particular to a hydraulic oil cylinder surface strengthening coating composite machining forming device which comprises a base, and a workpiece storage table is slidably connected to the base; the micro-groove machining assembly is arranged above the workpiece, the micro-groove machining assembly comprises a buckling cover, the buckling cover is located over the workpiece and forms half wrapping on the workpiece, a sliding groove is formed in the buckling cover, a mounting base is slidably connected into the sliding groove, and a first laser head is mounted in the mounting base. And on the basis, the microgroove machining treatment step is added, a microcosmic groove structure is machined in the surface of the workpiece in advance through the first laser head, the microgroove is filled with spraying powder to form preliminary anchoring, mechanical locking of ceramic spraying and the workpiece is facilitated, the bonding strength of the coating and the workpiece is improved, and the risk that the coating is peeled off in a large area is reduced.

Description

Technical Field

[0001] This invention relates to the field of composite processing and molding equipment, and in particular to a composite processing and molding equipment for a surface strengthening coating of a hydraulic cylinder. Background Technology

[0002] Large hydraulic equipment is widely used in key fields such as marine engineering equipment, metallurgical continuous casting ingot internal guide hydraulic lifting system, water conservancy project large gate hoist, and mechanical precision forming. When hydraulic equipment is in service under harsh working conditions (such as high load, corrosive media, dust erosion, etc.), the surface is very prone to cracks, rust, coating peeling and other damage, which seriously affects the stability of equipment operation and service life.

[0003] Traditional ceramic spraying technology suffers from a significant difference in the coefficients of thermal expansion between ceramic materials and steel substrates, resulting in weak adhesion between the coating and the substrate, making it prone to peeling. In addition, pores are easily formed inside the coating during the spraying process, resulting in high porosity. This not only reduces the density of the coating but may also lead to hydraulic oil penetration, causing problems such as coating blistering and failure. Summary of the Invention

[0004] The purpose of this invention is to provide a hydraulic cylinder surface strengthening coating composite processing and forming device, which improves the bonding strength between the coating and the surface of the hydraulic cylinder.

[0005] This invention provides a composite processing and forming device for surface strengthening coating of hydraulic cylinders, including a base, a microgroove processing component, a connecting shell, a laser cladding component, a drive mechanism, a workpiece clamping component, and a ceramic spraying joint, wherein a workpiece placement platform is slidably connected to the base; The microgroove processing component is disposed above the workpiece. The microgroove processing component includes a cover, which is located directly above the workpiece and forms a semi-enclosed area around the workpiece. A sliding groove is provided in the cover, and a mounting base is slidably connected in the sliding groove. A first laser head is mounted in the mounting base. A reciprocating component is disposed on the surface of the cover for driving the mounting base and the first laser head to reciprocate along the workpiece axis. The bottom end of the connecting shell is fixedly connected to the base. The connecting shell has a U-shaped structure, and its side is fixedly connected to the cover. The laser cladding assembly is disposed on the connecting shell for laser cladding treatment of the workpiece surface. The driving mechanism is disposed in the connecting shell for driving the workpiece platform to move along the workpiece axis. The workpiece clamping assembly is disposed on the upper surface of the workpiece platform for fixing and driving the workpiece to rotate. The ceramic spraying joint is disposed at the end of the cover away from the connecting shell.

[0006] Preferably, the laser cladding assembly includes: a support arm fixed to the top of the connecting shell; an adjusting arm rotatably connected to the extension end of the support arm via a pin; a second laser head fixed to the other end of the adjusting arm; and a clamping plate fixed to the top of the pin, the clamping plate being selectively connected to a plurality of threaded holes on the support arm via bolts.

[0007] Preferably, the reciprocating assembly includes: a motor support frame fixed to the cover; a rotating shaft rotatably connected inside the motor support frame; a cam fixed to the bottom end of the rotating shaft, the outer edge of the cam abutting against the mounting base; and a drive motor disposed at the top end of the rotating shaft. The guide and reset mechanism includes two guide rods symmetrically sleeved inside the mounting base. One end of each guide rod is fixed with a stop block, and the other end is fixed with a baffle plate. The bottom end of the baffle plate is fixedly connected to the cover. A spring is sleeved on each guide rod. The spring is located between the baffle plate and the mounting base and abuts against both of them.

[0008] Preferably, the driving mechanism includes: a drive shaft rotatably connected inside the connecting shell; a motor connected to the top end of the drive shaft; a gear fixed to the bottom end of the drive shaft; and a rack meshing with the gear, the side wall of the rack being fixedly connected to the workpiece placement platform.

[0009] Preferably, the base has a strip groove, and the bottom end of the workpiece placement platform is fixed with a strip plate, which is embedded in the strip groove; two sliding rods fixedly connected to the base are inserted into the strip plate.

[0010] Preferably, the workpiece clamping assembly includes a U-shaped frame fixed to the upper surface of the workpiece platform, one end of the U-shaped frame is provided with a locking drive component, and the other end of the U-shaped frame is provided with a rotation auxiliary component.

[0011] Preferably, the locking drive component includes: a drive shaft laterally rotatably connected in the U-shaped frame; a rotary motor connected to one end of the drive shaft; a first retainer fixed to the other end of the drive shaft, wherein the first retainer has a positioning groove adapted to the shape of the workpiece end; and a locking bolt passing through the first retainer.

[0012] Preferably, the rotating auxiliary component includes: a threaded rod threadedly connected to the other end of the U-shaped frame; a handwheel fixed to one end of the threaded rod; a fixed plate rotatably connected to the other end of the threaded rod via a bearing; and a second retainer rotatably connected to the fixed plate, wherein the second retainer has a groove adapted to the shape of the workpiece end.

[0013] Preferably, the first laser head is a pulsed laser with adjustable output parameters, used to process microgroove structures of different depths and widths on the surface of the workpiece.

[0014] Preferably, the microgroove structure includes one or more combinations of spiral grooves, annular grooves, mesh-like grooves, or dot matrix pits.

[0015] The hydraulic cylinder surface strengthening coating composite processing and forming device provided by the present invention has the following beneficial effects: 1. This device employs a composite process of microgroove machining, ceramic spraying, and laser cladding. A pulsed first laser head pre-machines a micro-groove structure on the surface of the hydraulic cylinder. Ceramic spraying powder fills the microgroove to form preliminary mechanical anchoring, achieving initial bonding between the ceramic coating and the workpiece. During subsequent laser cladding, the molten pool penetrates deep into the microgroove, allowing the coating material and the steel substrate to fully mix and melt in the microgroove area. This fundamentally solves the problem of weak bonding caused by the large difference in thermal expansion coefficients between the ceramic material and the steel substrate in traditional ceramic spraying, significantly reducing the risk of large-area coating peeling. Simultaneously, the rapid scanning and melting effect of laser cladding reduces internal porosity and pores in the coating, preventing blistering and failure caused by hydraulic oil penetration. This improves the coating's density, corrosion resistance, and erosion resistance, extending the service life of the hydraulic cylinder under harsh conditions such as high loads, corrosive media, and dust erosion.

[0016] 2. This device integrates the microgroove processing component, ceramic spraying joint, and laser cladding component into a single unit. Combined with the linkage between the workpiece clamping component and the drive mechanism, the hydraulic cylinder workpiece can complete the entire surface strengthening process—microgroove processing, ceramic spraying, and laser cladding—in a single clamping operation, eliminating the need for secondary clamping and station transfer. On one hand, this fundamentally eliminates the cumulative positioning errors caused by multiple clamping operations in traditional separate spraying and cladding processes, ensuring the accuracy and consistency of the coating formation. The overall coating quality is significantly superior to traditional processes. On the other hand, it eliminates the time required for workpiece transfer and re-clamping between processes, greatly improving the overall processing efficiency of hydraulic cylinder surface strengthening and reducing the complexity of the production process.

[0017] 3. The first laser head in this device is a pulsed laser with adjustable output parameters. It can process microgroove structures such as spiral grooves, annular grooves, grid-like grooves, dot matrix pits, or combinations thereof on the surface of the workpiece according to the actual service conditions of the hydraulic cylinder. It can also flexibly adjust the depth and width of the microgroove to achieve customized surface strengthening design and specifically improve the wear resistance and impact resistance of the cylinder surface. At the same time, the reciprocating component of the microgroove processing component can drive the first laser head to reciprocate along the workpiece axis. In conjunction with the rotation and axial feed motion of the workpiece, regular and uniform microgrooves with predetermined morphology can be processed on the outer surface of the cylinder to meet the microgroove processing requirements of cylinders of different specifications.

[0018] 4. The laser cladding assembly, through the cooperation of the pin, clamping plate, and support arm, allows the adjusting arm to rotate around the pin at multiple angles, thereby adjusting the laser incident angle of the second laser head. This not only adapts to hydraulic cylinder workpieces of different diameters but also optimizes the laser incident angle according to the cladding process requirements, ensuring the cladding effect. The locking drive component of the workpiece clamping assembly cooperates with the rotating auxiliary component. The rotating auxiliary component can adjust the distance between the second clamping seat and the first clamping seat through the threaded rod, adapting to hydraulic cylinders of different lengths. Furthermore, the first and second clamping seats are respectively provided with positioning grooves and slots that adapt to the shape of the workpiece end, which can meet the clamping and fixing requirements of cylinders with different end shapes, greatly improving the versatility and applicability of the equipment.

[0019] 5. The drive mechanism of this device adopts a gear and rack transmission pair, which converts the rotational motion of the motor into the linear motion of the workpiece stage. With the precise control of the servo motor, the speed and position of the workpiece axial feed can be precisely adjusted. The base is provided with a strip groove, and the workpiece stage is equipped with a strip plate and a parallel slide bar, which provides double guidance and limit for the axial movement of the workpiece stage, preventing lateral deviation and rotation, and ensuring smooth movement. The reciprocating component of the microgroove processing component is equipped with a symmetrical guide rod and a spring-based guide and reset mechanism, which ensures that the reciprocating motion of the mounting base and the first laser head always proceeds precisely along the slide groove, avoiding uneven microgroove processing caused by motion deviation. The high-precision design and coordination of each moving part ensures the processing accuracy of the entire process of microgroove processing, spraying, and cladding, resulting in uniform coating formation without local defects.

[0020] 6. The locking drive of the workpiece clamping assembly fixes the end of the workpiece in the positioning groove with locking bolts to prevent the workpiece from sliding during high-speed rotation. The second chuck of the rotating auxiliary component is rotatably connected to the fixed plate and can rotate synchronously with the workpiece. It only plays a supporting role and does not transmit torque, so that the workpiece always maintains good coaxiality during the rotational processing. At the same time, the central axis of the locking drive and the rotating auxiliary component coincides, ensuring the coaxiality accuracy of the workpiece after clamping. This avoids problems such as uneven microgroove processing and inconsistent coating thickness caused by workpiece wobble, and further improves the quality of coating curing and forming.

[0021] In summary, this invention employs a composite process of spraying and cladding, and adds a microgroove processing step on this basis. A micro-groove structure is pre-processed on the workpiece surface using a first laser head. Sprayed powder is filled into the microgroove to form a preliminary anchor, which facilitates the mechanical locking of ceramic spraying (base coating) with the workpiece, increases the bonding strength between the coating and the workpiece, and reduces the risk of large-area peeling of the coating. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the microgroove processing component in this invention; Figure 3 This is a schematic diagram of the connection structure of the drive mechanism in this invention; Figure 4 This is a schematic diagram of the workpiece clamping assembly in this invention; Figure 5 This is a schematic diagram of the rotating auxiliary component in this invention; Figure 6 This is a schematic diagram of the laser cladding assembly in this invention; Figure 7 This is a schematic diagram of the structure of the cover, slide, mounting base, and first laser head in this invention; Figure 8 This is a schematic diagram of the locking drive component in this invention.

[0024] Explanation of reference numerals in the attached drawings: 1. Base; 11. Strip groove; 2. Workpiece placement stage; 21. Strip plate; 22. Slide rod; 3. Microgroove processing assembly; 31. Cover; 32. Slide groove; 33. Mounting base; 34. First laser head; 35. Reciprocating assembly; 351. Motor support frame; 352. Rotating shaft; 353. Cam; 354. Drive motor; 355. Guide rod; 356. Stop; 357. Baffle; 358. Spring; 4. Connecting shell; 5. Laser cladding assembly; 51. Support arm; 52. Pin; 53. 54. Adjusting arm; 55. Second laser head; 6. Clamping plate; 7. Drive mechanism; 61. Drive shaft; 62. Motor; 63. Gear; 64. Rack; 7. Workpiece clamping assembly; 71. U-shaped frame; 72. Locking drive component; 721. Drive shaft; 722. Rotary motor; 723. First clamping seat; 724. Positioning groove; 725. Locking bolt; 73. Rotation auxiliary component; 731. Threaded rod; 732. Handwheel; 733. Fixing plate; 734. Second clamping seat; 735. Slot; 8. Ceramic spraying joint. Detailed Implementation

[0025] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In this embodiment, as Figure 1 and Figure 2 As shown, a composite processing and forming device for surface strengthening coating of hydraulic cylinder includes a base 1, on which a workpiece placement platform 2 is slidably connected; a microgroove processing component 3 is disposed above the workpiece, the microgroove processing component 3 includes a cover 31, the cover 31 is located directly above the workpiece and forms a semi-enclosed area on the workpiece, a sliding groove 32 is formed in the cover 31, a mounting base 33 is slidably connected in the sliding groove 32, a first laser head 34 is mounted in the mounting base 33, and the surface of the cover 31 is configured with a mechanism for driving the mounting base 33 and the first laser head 34 to reciprocate along the workpiece axis. The reciprocating assembly 35 is movable; the connecting shell 4 is fixedly connected to the base 1 at its bottom end and has a U-shaped structure, with its side fixedly connected to the cover 31; the laser cladding assembly 5 is disposed on the connecting shell 4 and is used to perform laser cladding treatment on the surface of the workpiece; the drive mechanism 6 is disposed in the connecting shell 4 and is used to drive the workpiece stage 2 to move along the workpiece axis; the workpiece clamping assembly 7 is disposed on the upper surface of the workpiece stage 2 and is used to fix and drive the workpiece to rotate; and the ceramic spraying joint 8 is disposed on the end of the cover 31 away from the connecting shell 4.

[0027] Therefore, by machining microgrooves on the surface of the hydraulic cylinder, the adhesion between the base coating and the hydraulic cylinder workpiece is increased; the integrated design of microgrooving, ceramic spraying and laser cladding allows the hydraulic cylinder workpiece to complete the entire surface strengthening process in a single clamping state.

[0028] In some embodiments, such as Figure 1 and Figure 6 As shown, the laser cladding assembly 5 includes a support arm 51 fixed to the top of the connecting shell 4; an adjusting arm 53 rotatably connected to the extension end of the support arm 51 via a pin 52; a second laser head 54 fixed to the other end of the adjusting arm 53; and a clamping plate 55 fixed to the top of the pin 52. The clamping plate 55 is selectively connected to multiple threaded holes on the support arm 51 via bolts.

[0029] Specifically, the support arm 51 extends outward from the top of the connecting shell 4; the adjusting arm 53 can rotate around the pin 52, thereby adjusting the angle of the second laser head 54 relative to the workpiece surface; the clamping plate 55 cooperates with multiple threaded holes on the support arm 51 to lock the adjusting arm 53 at multiple angles. By adjusting the second laser head 54 at multiple angles, the second laser head 54 can adapt to hydraulic cylinder workpieces of different diameters, and the laser incident angle can be optimized according to the requirements of the cladding process.

[0030] In some embodiments, such as Figure 2 and Figure 7 As shown, the reciprocating assembly 35 includes a motor support frame 351 fixed to the cover 31; a rotating shaft 352 rotatably connected inside the motor support frame 351; a cam 353 fixed to the bottom end of the rotating shaft 352, the outer edge of the cam 353 abutting against the mounting base 33; and a drive motor 354 disposed at the top end of the rotating shaft 352. The guide reset mechanism includes two guide rods 355 symmetrically sleeved inside the mounting base 33. One end of the guide rod 355 is fixed with a stop block 356, and the other end is fixed with a baffle 357. The bottom end of the baffle 357 is fixedly connected to the cover 31. A spring 358 is sleeved on the guide rod 355. The spring 358 is located between the baffle 357 and the mounting base 33 and abuts against both of them.

[0031] Specifically, the drive motor 354 drives the cam 353 to rotate at a constant speed through the rotating shaft 352; when the protruding part of the cam 353 rotates to contact the mounting seat 33, it pushes the mounting seat 33 to slide to one side along the slide groove 32; when the protruding part of the cam 353 rotates past and the cam 353 disengages from the mounting seat 33, the elastic restoring force of the spring 358 pushes the mounting seat 33 to slide back to its original position.

[0032] The guide rods 355 are symmetrically arranged on both sides of the mounting base 33, pass through the mounting base 33 and slide in cooperation with the mounting base 33, serving as guides and limiters; the stop block 356 is fixed to one end of the guide rod 355 to prevent the mounting base 33 from coming out of the end of the guide rod 355; the baffle 357 is fixed to the other end of the guide rod 355 and provides a support surface for the spring 358.

[0033] In some embodiments, such as Figure 3 As shown, the drive mechanism 6 includes a drive shaft 61 rotatably connected inside the connecting shell 4; a motor 62 connected to the top end of the drive shaft 61; a gear 63 fixed to the bottom end of the drive shaft 61; and a rack 64 meshing with the gear 63. The side wall of the rack 64 is fixedly connected to the workpiece platform 2. Specifically, the motor 62 transmits rotational motion to the gear 63 via the drive shaft 61. The gear 63 and the rack 64 form a rack and pinion transmission pair, converting rotational motion into linear motion.

[0034] Since the rack 64 is fixedly connected to the workpiece platform 2, the rotation of the gear 63 drives the rack 64 to move linearly, thereby driving the workpiece platform 2 to move along the workpiece axis; the motor 62 is preferably a servo motor, which can realize precise speed control and position control.

[0035] In some embodiments, such as Figure 1 and Figure 4 As shown, a strip groove 11 is provided on the base 1, and a strip plate 21 is fixed at the bottom end of the workpiece placement platform 2. The strip plate 21 is embedded in the strip groove 11; two sliding rods 22 that are fixedly connected to the base 1 are inserted into the strip plate 21. Specifically, the strip groove 11 is formed on the base 1 along the workpiece axis, providing a guide track for the movement of the workpiece platform 2; the strip plate 21 is embedded in the strip groove 11 and forms a sliding fit with the side wall of the strip groove 11, which restricts the lateral movement and rotational freedom of the workpiece platform 2, ensuring that the workpiece platform 2 can only move along the axial direction; the two slide rods 22 are arranged in parallel, pass through the strip plate 21 and slide in fit with the strip plate 21, further improving the guiding accuracy and movement stability.

[0036] In some embodiments, such as Figure 4 As shown, the workpiece clamping assembly 7 includes a U-shaped frame 71 fixed to the upper surface of the workpiece stage 2. One end of the U-shaped frame 71 is provided with a locking drive component 72, and the other end of the U-shaped frame 71 is provided with a rotation auxiliary component 73.

[0037] Specifically, the U-shaped frame 71 is located above the workpiece placement platform 2, providing a mounting base for the locking drive component 72 and the rotating auxiliary component 73; the locking drive component 72 and the rotating auxiliary component 73 are arranged opposite each other, with their central axes coinciding, and together they clamp both ends of the workpiece.

[0038] In some embodiments, such as Figure 8 As shown, the locking drive component 72 includes a drive shaft 721 that is laterally rotatably connected to the U-shaped frame 71; a rotary motor 722 connected to one end of the drive shaft 721; a first retainer 723 fixed to the other end of the drive shaft 721, wherein the first retainer 723 has a positioning groove 724 adapted to the shape of the end of the workpiece; and a locking bolt 725 passing through the first retainer 723.

[0039] Specifically, the rotary motor 722 is installed on the outside of the U-shaped frame 71 and transmits torque to the first locator 723 through the drive shaft 721. The positioning groove 724 of the first locator 723 is designed according to the shape of the workpiece end (such as a common conical surface, spherical surface or flat groove). After the workpiece end is inserted into the positioning groove 724, the locking bolt 725 is tightened. The bolt end abuts against the workpiece surface and fixes the workpiece end in the positioning groove 724, thereby preventing the workpiece from sliding when rotating at high speed.

[0040] In some embodiments, such as Figure 5As shown, the rotating auxiliary component 73 includes a threaded rod 731 that is threaded to the other end of the U-shaped frame 71; a handwheel 732 fixed to one end of the threaded rod 731; a fixed plate 733 that is rotatably connected to the other end of the threaded rod 731 via a bearing; and a second card holder 734 that is rotatably connected to the fixed plate 733, wherein the second card holder 734 has a slot 735 that is adapted to the shape of the end of the workpiece.

[0041] It should be noted that the threaded rod 731 engages with the threaded hole of the U-shaped bracket 71. The operator rotates the handwheel 732, driving the threaded rod 731 to rotate and move axially, thereby adjusting the distance between the second chuck 734 and the first chuck 723 to accommodate workpieces of different lengths. The fixed plate 733 is connected to the threaded rod 731 via bearings, ensuring that the fixed plate 733 does not rotate with the threaded rod 731, but only moves axially. The second chuck 734 is rotatably connected to the fixed plate 733 and can rotate freely. This rotatable connection between the second chuck 734 and the fixed plate 733 ensures that when the rotary motor 722 drives the workpiece to rotate, the second chuck 734 rotates synchronously with the workpiece, serving only a supporting function without transmitting torque.

[0042] In some embodiments, the first laser head 34 is a pulsed laser with adjustable output parameters, used to process microgroove structures of different depths and widths on the surface of a workpiece. The microgroove structures include one or more combinations of spiral grooves, annular grooves, mesh-like grooves, or dot matrix pits.

[0043] Specifically, pulsed lasers can achieve high-precision material removal on the surface of workpieces. Spiral grooves, annular grooves, grid-like grooves, or dot matrix pits can all increase the surface roughness of the workpiece, thereby strengthening the bonding strength between the base coating and the workpiece surface.

[0044] The working principle of this application is illustrated below with a preferred embodiment: First, the hydraulic cylinder workpiece to be processed is installed on the workpiece clamping assembly 7: one end of the workpiece is inserted into the positioning groove 724 of the first locator 723 and fixed by the locking bolt 725; at the same time, the handwheel 732 is turned to drive the threaded rod 731 to rotate, so that the slot 735 of the second locator 734 abuts against the other end of the workpiece. Thus, the workpiece is coaxially fixed on the U-shaped frame 71. Start the motor 62. The motor 62 drives the gear 63 to rotate through the drive shaft 61. The gear 63 drives the rack 64 that meshes with it to move horizontally, thereby driving the workpiece platform 2 to move axially along the slide bar 22, so that the workpiece moves to below the cover 31. Then, the rotary motor 722 is started, which drives the workpiece to rotate at a constant speed. At the same time, the drive motor 354 is started, which drives the rotating shaft 352 and the cam 353 to rotate at a constant speed. The outer edge of the cam 353 periodically pushes the mounting seat 33 to slide in the slide groove 32. When the protruding part of the cam 353 rotates, the spring 358 pushes the mounting seat 33 to return to its original position. Under the action of the cam 353 and the spring 358, the mounting seat 33 and the first laser head 34 reciprocate along the workpiece axis. At the same time, the drive mechanism 6 drives the workpiece stage 2 to slowly feed the workpiece along the axial direction. Under the combined action of reciprocating motion and workpiece rotation, the first laser head 34 processes a micro-groove structure with a predetermined shape on the outer surface of the workpiece. After the microgroove is processed, the drive mechanism 6 reverses the drive to move the workpiece stage 2, so that the workpiece exits the cover 31 and returns to the initial position. Next, the ceramic spraying connector 8 is connected to an external powder supply system and an air source. The ceramic spraying connector 8 is used to spray ceramic material powder onto the workpiece surface. The drive mechanism 6 drives the workpiece stage 2 to move the workpiece axially, while the workpiece clamping assembly 7 drives the workpiece to rotate at a constant speed. The ceramic spraying connector 8 sprays ceramic powder onto the rotating workpiece surface, forming a pre-fabricated wear-resistant coating base layer covering the microgroove structure. Due to the presence of the microgrooves, the sprayed powder fills into the interior of the microgrooves, forming a preliminary mechanical locking structure. After the spraying is completed, the drive mechanism 6 drives the workpiece platform 2 to move in the reverse direction, so that the workpiece is reset to the initial position; After the ceramic spraying stage is completed, laser cladding is performed. The bolts on the clamping plate 55 are loosened, and the adjusting arm 53 is rotated around the pin 52 so that the second laser head 54 fixed at the end of the adjusting arm 53 is aligned with the workpiece surface. After adjusting to the required angle, the bolts are tightened so that the clamping plate 55 is fixed with the corresponding threaded hole on the support arm 51, thereby locking the working position of the second laser head 54. The rotary motor 722 of the workpiece clamping assembly 7 is started, driving the workpiece to rotate at a uniform speed. At the same time, the drive mechanism 6 is started, driving the workpiece stage 2 to move the workpiece along the axial direction. The second laser head 54 is started, outputting a high-energy laser beam to irradiate the surface of the sprayed ceramic coating. The laser beam rapidly scans and melts the coating, causing the ceramic material and the workpiece substrate to form a deep molten pool in the microgroove.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A composite processing and forming device for reinforcing coating on the surface of a hydraulic cylinder, characterized in that, include: A base (1) is slidably connected to a workpiece placement platform (2); The microgroove processing assembly (3) is located above the workpiece. The microgroove processing assembly (3) includes a cover (31), which is located directly above the workpiece and forms a semi-enclosed area around the workpiece. A sliding groove (32) is provided in the cover (31), and a mounting base (33) is slidably connected in the sliding groove (32). A first laser head (34) is installed in the mounting base (33). A reciprocating assembly (35) is provided on the surface of the cover (31) for driving the mounting base (33) and the first laser head (34) to reciprocate along the workpiece axis. Connecting shell (4), the bottom end of the connecting shell (4) is fixedly connected to the base (1), the connecting shell (4) has a U-shaped structure, and its side is fixedly connected to the buckle cover (31); A laser cladding assembly (5) is disposed on the connecting shell (4) and is used to perform laser cladding on the surface of the workpiece; The drive mechanism (6) is disposed in the connecting shell (4) and is used to drive the workpiece platform (2) to move along the workpiece axis; The workpiece clamping assembly (7) is disposed on the upper surface of the workpiece stage (2) and is used to fix and drive the workpiece to rotate. And a ceramic spraying connector (8) disposed at the end of the cover (31) away from the connecting shell (4).

2. The hydraulic cylinder surface strengthening coating composite processing and forming device according to claim 1, characterized in that, The laser cladding assembly (5) includes: Support arm (51) fixed to the top of the connecting shell (4); The adjusting arm (53) is rotatably connected to the extension end of the support arm (51) via a pin (52). A second laser head (54) is fixed to the other end of the adjusting arm (53); A clamping plate (55) is fixed to the top of the pin (52), and the clamping plate (55) is selectively connected to a plurality of threaded holes on the support arm (51) by bolts.

3. The hydraulic cylinder surface strengthening coating composite processing and forming device according to claim 2, characterized in that, The reciprocating component (35) includes: Motor support frame (351) fixed to the cover (31); Rotary shaft (352) is rotatably connected inside the motor support frame (351). A cam (353) is fixed to the bottom end of the rotating shaft (352), and the outer edge of the cam (353) abuts against the mounting base (33); A drive motor (354) is configured at the top of the rotating shaft (352); And a guide reset mechanism, the guide reset mechanism includes two guide rods (355) symmetrically sleeved inside the mounting base (33), one end of the guide rod (355) is fixed with a stop (356), and the other end is fixed with a baffle (357). The bottom end of the baffle (357) is fixedly connected to the cover (31). A spring (358) is sleeved on the guide rod (355). The spring (358) is located between the baffle (357) and the mounting base (33) and abuts against both of them respectively.

4. The hydraulic cylinder surface strengthening coating composite processing and forming device according to claim 3, characterized in that, The drive mechanism (6) includes: Rotary drive shaft (61) connected inside the connecting shell (4); A motor (62) connected to the top end of the drive shaft (61); Gear (63) fixed to the bottom end of the drive shaft (61); A rack (64) meshes with the gear (63), and the side wall of the rack (64) is fixedly connected to the workpiece platform (2).

5. The hydraulic cylinder surface strengthening coating composite processing and forming device according to claim 4, characterized in that, The base (1) has a strip groove (11) and the bottom of the workpiece platform (2) is fixed with a strip plate (21). The strip plate (21) is embedded in the strip groove (11). Two sliding rods (22) that are fixedly connected to the base (1) are inserted into the strip plate (21).

6. The hydraulic cylinder surface strengthening coating composite processing and forming device according to claim 5, characterized in that, The workpiece clamping assembly (7) includes a U-shaped frame (71) fixed to the upper surface of the workpiece platform (2). One end of the U-shaped frame (71) is provided with a locking drive (72), and the other end of the U-shaped frame (71) is provided with a rotation auxiliary (73).

7. The hydraulic cylinder surface strengthening coating composite processing and forming device according to claim 6, characterized in that, The locking drive (72) includes: The drive shaft (721) is laterally rotatably connected to the U-shaped frame (71). A rotary motor (722) is connected to one end of the drive shaft (721); A first bracket (723) is fixed to the other end of the drive shaft (721), and a positioning groove (724) adapted to the shape of the workpiece end is provided in the first bracket (723). Locking bolts (725) are inserted into the first card holder (723).

8. The hydraulic cylinder surface strengthening coating composite processing and forming device according to claim 7, characterized in that, The rotating auxiliary component (73) includes: A threaded rod (731) is threaded to the other end of the U-shaped frame (71). A handwheel (732) is fixed to one end of the threaded rod (731); The fixed plate (733) is rotatably connected to the other end of the threaded rod (731) via a bearing. A second card holder (734) is rotatably connected to the fixed plate (733), and a card slot (735) adapted to the shape of the end of the workpiece is provided in the second card holder (734).

9. The hydraulic cylinder surface strengthening coating composite processing and forming device according to claim 8, characterized in that, The first laser head (34) is a pulsed laser with adjustable output parameters, used to process microgroove structures of different depths and widths on the surface of the workpiece.

10. The hydraulic cylinder surface strengthening coating composite processing and forming device according to claim 9, characterized in that, The microgroove structure includes one or more combinations of spiral grooves, annular grooves, mesh-like grooves, or lattice pits.

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