Laser device for deburring and shock peening of gear chamber cover

Abstract

The utility model discloses a laser device for deburring and impact strengthening of a gear chamber cover. The laser device comprises a PLC (Programmable Logic Controller) control platform, the PLC control platform displays data through a touch screen, the PLC control platform controls a mechanical arm control cabinet, the mechanical arm control cabinet controls a mechanical arm, and the mechanical arm is connected with a demonstrator and a PC (Personal Computer) offline system through a built-in cable. The laser device is high in machining efficiency, higher in speed and better in effect, and laser deburring treatment and impact strengthening treatment of the gear chamber cover are integrated into one system. A laser deburring technology can be used for deburring a workpiece, and a laser shock peening technology can be used for carrying out shock peening treatment on a key part of a gear chamber cover component by changing technological parameters.

Description

Technical Field

[0001] This utility model relates to a gear chamber cover processing equipment, or more specifically, a laser device for deburring and impact strengthening of gear chamber covers. Background Technology

[0002] The gear chamber cover is a typical example of a complex-shaped, multi-machined, and high-precision aluminum alloy thin-walled housing. As a crucial component of the engine, the gear chamber cover supports other moving parts, while engine oil circulates within it, providing lubrication, sealing, cleaning, cooling, and rust prevention. Due to its irregular shape, the blank is manufactured using die casting. Aluminum alloy die-cast blanks offer high precision, allowing areas with lower dimensional and positional accuracy requirements to be die-cast in a single process, while other surfaces requiring higher machining precision only require finishing allowances. Therefore, after finishing the cover, deburring is necessary.

[0003] On the other hand, during actual use, the gear chamber cover operates in harsh environments, and its components frequently bear significant torques and are sometimes subjected to electrochemical corrosion. Prolonged operation may lead to fatigue cracking and component failure. Surface strengthening treatment of the gear chamber cover can effectively increase the residual compressive stress on the surface and reduce cracks generated during operation. Surface strengthening treatment of the gear chamber cover is of great significance for extending its service life.

[0004] Laser shock peening, also known as laser shot peening, involves applying a high-power-density (GW / cm²) short-pulse (10–30 ns) laser beam through a transparent confinement layer to an energy-absorbing coating on a metal surface. The coating rapidly vaporizes upon absorbing the laser energy, almost simultaneously forming a large amount of dense, high-temperature (10 K), high-pressure (1 GPa) plasma. This plasma continues to absorb laser energy, rapidly heating and expanding before exploding to create a high-intensity shock wave that impacts the metal surface. When the peak pressure of the shock wave exceeds the material's dynamic yield strength, the material undergoes plastic deformation, generating compressive stress perpendicular to the surface. After the laser treatment ends, the reaction force from the surrounding material results in a high residual compressive stress on the surface. This residual compressive stress reduces the tensile stress level under alternating loads, lowering the average stress level and thus increasing the fatigue crack initiation life. Simultaneously, the presence of residual compressive stress can induce crack closure, effectively reducing the driving force for fatigue crack propagation and extending the fatigue crack propagation life. The main function of the coating is to protect the workpiece from laser burns and enhance the absorption of laser energy. Commonly used coating materials include black paint and aluminum foil.

[0005] Laser deburring technology has been widely adopted. Its basic principle is to utilize the high intensity, high energy density, strong focusing, and good directionality of lasers. A laser beam emitted from a laser source is focused into spots of different diameters by an optical device, scanning the burrs on the part and thus melting, vaporizing, and ultimately removing them. It boasts advantages such as high efficiency and wide applicability. However, current laser deburring equipment often only has the single function of deburring workpieces. The main problem with laser deburring technology is that the laser inevitably scans the workpiece itself during the process. The laser causes varying degrees of oxidation to the actual workpiece edges, leading to a decrease in the workpiece's surface corrosion and wear resistance.

[0006] Currently, developed countries have expanded the application of laser shock peening technology to steam turbines, water turbine blades, oil pipelines, and key automotive components. In particular, laser shock peening of key automotive parts can significantly extend their fatigue life. While there has been some research and application of laser shock peening technology in China, it is mainly used in high-end fields such as aerospace, with almost no application in traditional industries. Utility Model Content

[0007] Therefore, it is necessary to provide a laser device for deburring and impact strengthening of gear chamber covers to address the aforementioned technical problems.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0009] A laser device for deburring and impact strengthening of gear chamber covers is characterized in that the laser device for deburring and impact strengthening of gear chamber covers includes a PLC control platform, the PLC control platform displays data through a touch screen, the PLC control platform controls the robotic arm control cabinet, the robotic arm control cabinet controls the robotic arm, and the robotic arm is connected to a teach pendant and a PC offline system through an internal cable.

[0010] In a preferred embodiment of the present invention, the end of the robotic arm is equipped with a pneumatic clamping device for gripping the gear chamber cover.

[0011] In a preferred embodiment of this utility model, the robotic arm has a six-axis linkage structure.

[0012] As a preferred embodiment of the present invention, the laser device for deburring and impact strengthening of the gear chamber cover further includes a laser, a clamping system and a monitoring system, wherein the monitoring system monitors the robotic arm and the clamping system.

[0013] As a preferred embodiment of the present invention, the laser device for deburring and impact strengthening of the gear chamber cover further includes an auxiliary system, which includes a lighting device, a limit protection device, a safety valve and a thermometer, and the PLC control platform controls the lighting device and the limit protection device.

[0014] In a preferred embodiment of the present invention, the robotic arm comprises six joint axes.

[0015] In a preferred embodiment of the present invention, the laser device for deburring and impact strengthening of the gear chamber cover further includes a cleaning system, and the PLC control platform controls the cleaning system.

[0016] In a preferred embodiment of the present invention, the laser device for deburring and impact strengthening of the gear chamber cover further includes a coating spraying system, and the PLC control platform controls the coating spraying system.

[0017] As a preferred embodiment of the present invention, the laser device for deburring and impact strengthening of gear chamber cover further includes a PC offline system.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention provides a laser device for deburring and impact strengthening of gear chamber covers. This device offers high processing efficiency, faster speed, and better results, integrating laser deburring and impact strengthening treatments for gear chamber covers into a single system. It can utilize laser deburring technology to remove burrs from workpieces, and by modifying process parameters, laser impact strengthening technology can be applied to critical parts of the gear chamber cover components for impact strengthening. Beyond gear chamber covers, the processing method can be extended to numerous other parts. By writing corresponding trajectory programs and selecting appropriate laser parameters and feed rates, optimal process parameters can be obtained. Attached Figure Description

[0020] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the laser device for deburring and impact strengthening of gear chamber covers according to the present invention.

[0022] Figure 2 for Figure 1A schematic diagram of the laser device used for deburring and impact strengthening of gear chamber covers;

[0023] Figure 3 for Figure 2 A schematic diagram of the robotic arm used in the laser device for deburring and impact strengthening of gear chamber covers;

[0024] The markings in the diagram are explained as follows: 1. Robotic arm control cabinet; 10. Monitoring system; 11. Teach pendant; 12. PC offline system; 2. Robotic arm; 3. Cleaning system; 4. Coating spraying system; 5. Laser; 6. PLC control platform; 7. Touch screen; 8. Auxiliary system; 9. Clamping system. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0026] like Figure 1 As shown, the laser device for deburring and impact strengthening of gear chamber cover includes a PLC control platform 6. The PLC control platform 6 displays data through a touch screen 7. The PLC control platform 6 controls the robotic arm control cabinet 1. The robotic arm control cabinet 1 controls the robotic arm 2. The robotic arm 2 is connected to the teach pendant 11 and the PC offline system 12 through a built-in cable.

[0027] The end of the robotic arm 2 is equipped with a pneumatic clamping device for gripping the gear chamber cover.

[0028] In addition, the laser device for deburring and impact strengthening of the gear chamber cover also includes a laser 5, a clamping system 9 and a monitoring system 10, which monitors the robotic arm 2 and the clamping system 9.

[0029] The laser device for deburring and impact strengthening of gear chamber covers also includes an auxiliary system 8, which includes a lighting device, a limit protection device, a safety valve, and a thermometer. The PLC control platform 6 controls the lighting device and the limit protection device.

[0030] The laser device for deburring and impact strengthening of gear chamber covers also includes a cleaning system 3. The PLC control platform 6 controls the cleaning system 3. The cleaning system 3 includes cleaning nozzles, a pressure pump, a processing water tank, a filter assembly, a water supply pipe, a water level regulating valve, and a drain pipe regulator. The processing water tank is open at the top. A water inlet is located on the side of the processing water tank, connected to a circulation pump via a water supply pipe. Two drain outlets are located at the bottom of the processing water tank, connected to the filter assembly and the circulation pump respectively via water supply pipes. The opening and closing of the two drain outlets are controlled by the drain pipe regulator. The filter assembly can be a metal filter or a fabric filter, and should have a filtration accuracy of 30-50 to ensure water quality.

[0031] The laser device for deburring and impact strengthening of the gear chamber cover also includes a coating spraying system 4, which is controlled by a PLC control platform 6. The coating spraying system 4 uses a black paint delivery pipe.

[0032] It should be noted that the black paint delivery pipe in the coating spraying system 4 and the water supply pipe in the cleaning system 3 should be kept as short as possible, with fewer bends and joints. High-pressure resistant steel pipes are generally used, and a special high-pressure hose for hydraulic systems is used to connect the pressure pump and the nozzle assembly. During installation, the pipeline is generally sealed using a rigid seal, relying on the tightening force between the joints to ensure the sealing of the contact surfaces.

[0033] The laser device for deburring and impact strengthening of gear chamber covers also includes a PC offline system 12, which programs the blade waterjet deburring and shot peening trajectory. The system can also record position points and program the trajectory via a teach pendant. The blade deburring trajectory program and the blade shot peening trajectory program can be executed independently.

[0034] like Figure 3 As shown, the robotic arm 2 has a six-axis linkage structure, comprising six joint axes: A1, A2, A3, A4, A5, and A6, enabling the gripped workpiece to have linear and rotational motion in the X, Y, and Z directions. The robotic arm 2 employs an integrated enclosed design, with all servo motors, wires, and air pipes located inside the arm, effectively isolating the electrical components from external moisture. The front end of the robotic arm is equipped with a pneumatic clamping device for gripping workpieces, possessing high load capacity and positioning accuracy (≤0.02 mm), ensuring the accuracy of the movement trajectory after gripping the workpiece.

[0035] The following describes the operation of the laser device used for deburring and impact strengthening of gear chamber covers. Figure 2 As shown, the steps include:

[0036] (1) The die-cast gear chamber cover 7S is transported to the laser 5 by the conveyor belt 1S. The pneumatic clamp at the front end of the robotic arm 2 picks up the gear chamber cover 7S to ensure reliable positioning and secure clamping.

[0037] (2) Turn on the PLC control platform 6 and use the teach pendant 11 to drive the robotic arm 2 to position the workpiece at a position 30 cm above the center point of the bottom plane of the gear chamber cover. Set this as the workpiece origin and input the origin coordinate parameters into the teach pendant 11 to achieve workpiece positioning.

[0038] (3) Import the 3D model of the gear chamber cover into the PC offline system 12. Using CAM software, write deburring trajectory programs and laser shot peening trajectory programs for the parts of the gear chamber cover that are prone to burrs after die casting and for the reinforced parts, respectively. After determining the trajectory program, import it into the teach pendant 11, turn on the laser 5, and perform a trial run along the program trajectory. The running speed is 10%~30% of the normal processing speed. After the correction is correct, adjust the machine 2 to the workpiece origin;

[0039] (4) Turn on the laser 5, and under the linkage of the robotic arm 2 and the fixture, make the part of the workpiece that needs to be deburred move along the laser;

[0040] (5) After the deburring process is completed, the robotic arm 2 picks up the workpiece and moves it to the adjacent coating spraying system 4. The spray nozzle is opened with the inner wall of the gear chamber cover facing upwards, and the key parts of the inner wall are sprayed with black paint. Then the spray nozzle is closed. The robotic arm 2 picks up the workpiece again and moves it below the laser 5.

[0041] (6) Adjust the processing parameters of laser 5, turn on laser 5, and begin the impact strengthening treatment. After processing is completed, robotic arm 2 picks up the workpiece and moves it to the side for cleaning;

[0042] (7) Open the cleaning system 3, start the pressure pump, adjust the water pressure regulating valve to make the water pressure 50 MPa, and thoroughly clean the black paint on the inner wall of the gear chamber cover.

[0043] (8) After cleaning, the cleaning system 3 is turned off, the robotic arm 2 sends the gear chamber cover back to the conveyor belt, releases the pneumatic clamp, returns to the workpiece origin, the conveyor belt moves forward, and the PLC control platform 6 remains on, ready for the next processing.

[0044] This laser device for deburring and impact strengthening of gear chamber covers boasts high processing efficiency, faster speed, and better results. It integrates laser deburring and impact strengthening processes for gear chamber covers into a single system. It can utilize laser deburring technology to treat workpieces, and by modifying process parameters, it can apply laser impact strengthening technology to critical parts of the gear chamber cover components. Beyond gear chamber covers, its processing method can be extended to numerous other parts. By writing corresponding trajectory programs and selecting appropriate laser parameters and feed rates, optimal process parameters can be obtained.

[0045] Obviously, the embodiments described above are only some embodiments of this application, and not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application.

Claims

1. A laser device for deburring and impact strengthening of gear chamber covers, characterized in that, The laser device for deburring and impact strengthening of gear chamber cover includes a PLC control platform (6), which displays data via a touch screen (7). The PLC control platform (6) controls the robotic arm control cabinet (1), which controls the robotic arm (2). The robotic arm (2) is connected to a teach pendant (11) and a PC offline system (12) via a built-in cable. The laser device for deburring and impact strengthening of gear chamber cover also includes a laser (5), a clamping system (9), and a monitoring system (10). The monitoring system (10) monitors the robotic arm (2) and the clamping system (9).

2. The laser device for deburring and impact strengthening of gear chamber covers according to claim 1, characterized in that, The end of the robotic arm (2) is equipped with a pneumatic clamping device for gripping the gear chamber cover.

3. The laser device for deburring and impact strengthening of gear chamber covers according to claim 2, characterized in that, The robotic arm (2) is a six-axis linkage structure.

4. The laser device for deburring and impact strengthening of gear chamber covers according to claim 3, characterized in that, The laser device for deburring and impact strengthening of the gear chamber cover also includes an auxiliary system (8), which includes a lighting device, a limit protection device, a safety valve and a thermometer. The PLC control platform (6) controls the lighting device and the limit protection device.

5. The laser device for deburring and impact strengthening of gear chamber covers according to claim 4, characterized in that, The robotic arm (2) comprises six joint axes.

6. The laser device for deburring and impact strengthening of gear chamber covers according to claim 1, characterized in that, The laser device for deburring and impact strengthening of the gear chamber cover also includes a cleaning system (3), and the PLC control platform (6) controls the cleaning system (3).

7. The laser device for deburring and impact strengthening of gear chamber covers according to claim 1, characterized in that, The laser device for deburring and impact strengthening of the gear chamber cover also includes a coating spraying system (4), and the PLC control platform (6) controls the coating spraying system (4).

8. The laser device for deburring and impact strengthening of gear chamber covers according to claim 1, characterized in that, The laser device for deburring and impact strengthening of gear chamber cover also includes a PC offline system (12).

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