Device and method for machining texture on cam surface through plane laser

Abstract

The invention relates to the technical field of laser micro-texture machining, and discloses a device and method for machining a texture on the surface of a cam through plane lasers, the device comprises a plurality of vertically-arranged telescopic parts, the top end positions of the telescopic parts are adjustable in height and provided with glass plates, and the bottom faces of the glass plates are used for making contact with the peripheral face of the cam all the time. The plane laser focus position is indicated; the output end of the driving mechanism is connected with the cam, the cam is located below the glass plate, the driving mechanism is installed on the movable supporting plate, the movable supporting plate is arranged on the base, one side of the movable supporting plate is rotationally matched with the base, and the other side of the movable supporting plate is connected with the base through the spring. The cam is always in contact with the bottom surface of the glass plate in the rotating process; a three-dimensional coordinate table is replaced by a low-cost structure of the simple spring, the movable supporting plate and the height-adjustable glass plate, texture machining on the peripheral face of the cam through plane laser is achieved, and the machining mode is lower in cost, simple in structure and small in occupied space.

Description

Technical Field

[0001] The invention relates to the technical field of laser micro-texturing processing, in particular to a device and method for processing texture on a cam surface by using a plane laser. Background Art

[0002] Exploring the synergistic effect of texture and lubricant has gradually become one of the important directions of research on reducing friction loss. Friction loss is one of the main reasons for energy waste and limiting the service life of components. For example, as an important pair of friction pairs in the engine valve mechanism: the cam-tappet contact pair, due to the harsh working conditions such as high temperature, high speed, and alternating pressure, the friction pair surface is prone to severe wear, affecting the working accuracy of the entire valve mechanism and the performance of the engine.

[0003] It's known that texture can significantly reduce friction between objects, extending component life and reducing frictional losses. Lubricants can also reduce friction between objects. However, using both lubricants and texture simultaneously presents the potential for cavitation, potentially making them less effective than using either texture or lubricant alone. Therefore, it's essential to study the synergistic effects of texture and lubricant, so that they can combine their strengths under certain conditions. Quantitative measurements are essential when studying the synergistic effects of texture and lubricant. However, existing cam-tappet contact lubricant film measuring instruments are unable to investigate the synergistic effects of texture and lubricant, as the cam surface is smooth. Adding texture to the cam surface would allow for the study of the synergistic effects of texture and lubricant.

[0004] Laser can be used to texture the outer surface of the cam, but since the outer surface of the cam is not a planar structure, three-dimensional laser is required to texture the outer surface of the cam. However, the cost of three-dimensional laser processing is higher than that of planar laser processing. If you want to use planar laser to texture the outer surface of the cam, you need to set the cam on a three-dimensional coordinate table. However, the price of the three-dimensional coordinate table equipment is also relatively expensive, and the processing cost is also high; and the method of using chemical etching to process texture on the curved surface has the problems of complex operation and safety hazards. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the purpose of the present invention is to provide a device and method for processing texture on the surface of a cam using a planar laser. By using a low-cost structure such as a simple spring, a movable support plate and a height-adjustable glass plate, the three-dimensional coordinate table is replaced, and the texture processing of the outer surface of the cam using a planar laser is realized. This processing method has lower cost, simple structure, and takes up less space.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] In a first aspect, a device for processing a texture on a cam surface using a planar laser comprises:

[0008] The limiting unit includes a plurality of vertically arranged telescopic members, the top positions of the telescopic members are height-adjustable and are provided with glass plates, the bottom surface of the glass plates is used to always contact the outer peripheral surface of the cam and indicate the laser focus position;

[0009] The driving mechanism has an output end connected to a cam, which is located below the glass plate. The driving mechanism is installed on a movable support plate, which is arranged on a base. One side of the movable support plate rotates with the base, and the other side is connected to the base through a spring. The spring pushes up one side of the movable support plate, thereby ensuring that the cam is always in contact with the bottom surface of the glass plate during rotation.

[0010] As a further implementation method, the movable support plate has two sides along the length direction, and the first side is rotatably matched with the base through a rotating shaft; multiple springs are arranged between the bottom surface of the movable support plate at the second side and the base, and the springs are always in a compressed state.

[0011] As a further implementation, the driving mechanism includes a stepping motor, and the stepping motor is fixed on the movable supporting plate through a motor fixing plate.

[0012] As a further implementation, the stepper motor is connected to the cam via a transmission shaft to drive the cam to rotate, and the cam axis direction is parallel to the transmission shaft.

[0013] As a further implementation method, the bottom end of the telescopic member is fixed on the base, and multiple telescopic members are arranged along the four corners of the rectangle. The telescopic member includes a sleeve, a telescopic rod is provided in the sleeve, and a locking knob for locking the telescopic rod is provided on the sleeve.

[0014] As a further implementation, the top end of the telescopic rod is connected to the glass plate frame, and the four corners of the glass plate frame are used to be fixedly connected to the top end of the telescopic rod through plate frame fixing pieces.

[0015] As a further implementation, the glass plate frame is a frame structure with a rectangular opening on the inner side and a circle of inner support plates provided at the inner side edge for supporting the glass plate.

[0016] As a further implementation, a pressing plate is further included. The pressing plate is a long strip structure with a through hole provided at the end thereof. The pressing plate is used to press the glass plate and is connected to the glass plate frame as a whole through a plate frame fixing piece.

[0017] As a further implementation method, the rectangular opening is large enough for the cam to pass through, so as to ensure that the plane laser can process any position on the outer peripheral surface of the cam.

[0018] In a second aspect, a method for processing a texture on a cam surface using a planar laser is provided, using any of the above-described apparatuses for processing a texture on a cam surface using a planar laser, comprising the following steps:

[0019] After installing the cam, adjust the telescopic part to adjust the height of the glass plate, so that when the cam rotates to any position, the top of the cam is always in contact with the glass plate and the spring is always in a compressed state. According to the height of the glass plate, the focal length of the plane laser can be adjusted, so that the plane laser can always pass through the glass plate and focus at the position where the cam contacts the bottom surface of the glass plate; the driving mechanism drives the cam to rotate, and under the action of the spring, movable support plate and glass plate, the outer peripheral surface of the cam is always in contact with the glass plate, and the outer peripheral surface of the cam is textured using the plane laser.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. The device of the present invention replaces the three-dimensional coordinate table with a low-cost structure consisting of a simple spring, a movable support plate, and a height-adjustable glass plate, thereby realizing the texturing of the cam outer surface using a planar laser. This processing method has lower costs, a simple structure, and occupies less space.

[0022] 2. The present invention uses a spring to push up a movable support plate, causing one side of the plate to tend to rise, thereby achieving a tendency for the cam to be lifted. The height of the glass plate is limited by adjusting the height of the telescopic rod. When the spring is compressed and the driving mechanism drives the cam to rotate, the bottom surface of the glass plate can always remain in contact with the outer peripheral surface of the cam. The height of the bottom surface of the glass plate can be used as an adjustment indicator point for the focal length of the plane laser, so that the focus of the focused plane laser can always act on the outer peripheral surface of the cam, realizing continuous texturing of the outer peripheral surface of the cam using a plane laser without the aid of a three-dimensional coordinate platform.

[0023] 3. The glass plate of the present invention is arranged at the top of the telescopic rod. The glass plate can serve as a limit plate for the high position of the cam, ensuring that the cam can always contact the glass plate under the action of the spring. The glass plate can also indicate the focal length adjustment of the plane laser, so that the glass plate and the cam are accurately contacted under the action of the focused plane laser. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0025] Figure 1 Schematic diagram of the overall structure of the device in an embodiment of the present invention;

[0026] Figure 2 is a side structural schematic diagram of the device in an embodiment of the present invention;

[0027] Figure 3 1 is a schematic diagram of the main structure of the device in an embodiment of the present invention;

[0028] Figure 4 1 is a schematic diagram of a top view of the structure of the device in an embodiment of the present invention;

[0029] Figure 5 2 is a schematic structural diagram of a glass plate frame according to an embodiment of the present invention;

[0030] Figure 6 Schematic diagram of the axonometric structure of the device in an embodiment of the present invention.

[0031] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0032] Among them: 1. Plate frame fixing, 2. Glass plate frame, 3. Telescopic rod, 4. Locking knob, 5. Base fixing, 6. Cam, 7. Drive shaft, 8. Motor fixing plate, 9. Stepper motor, 10. Motor fixing, 11. Spring, 12. Glass plate, 13. Threaded hole, 14. Movable support plate, 15. Rotating shaft, 16. Plane laser, 17. Base; 21. Press plate, 22. Inner support plate. DETAILED DESCRIPTION

[0033] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0034] Example 1

[0035] In a typical embodiment of the present invention, referring to Figures 1-6 As shown, a device for processing texture on the surface of a cam using a plane laser includes a base 17, a movable support plate 14, a driving mechanism, a spring 11, a glass plate 12, and a limiting unit. The limiting unit includes several vertically arranged telescopic parts, the top position of the telescopic parts is height-adjustable and is provided with a glass plate. The bottom surface of the glass plate 12 is used to always be in contact with the outer peripheral surface of the cam 6, thereby indicating the focal position of the plane laser 16.

[0036] The output end of the driving mechanism is connected to the cam 6, which is located below the glass plate 12. The driving mechanism is installed on a movable support plate 14, which is arranged on a base 17. One side of the movable support plate 14 rotates with the base 17, and the other side is connected to the base 17 through a spring 11. The spring 11 pushes up one side of the movable support plate 14, thereby ensuring that the cam 6 is always in contact with the bottom surface of the glass plate 12 during the rotation process.

[0037] The base 17 can be fixed on a corresponding workbench via the base fixing member 5 .

[0038] like Figure 1 and Figure 6 As shown, the movable support plate 14 is located above the base 17 and extends along the length direction of the base 17. The two side edges of the movable support plate 14 along the length direction are the first side edge and the second side edge. A rotating shaft 15 passes through the first side edge, and ear plates can be set at the two ends of the base corresponding to the first side edge. The end of the rotating shaft 15 passes through the first side edge and is connected to the ear plate, so that the movable support plate 14 can rotate relative to the base 17 through the rotating shaft 15.

[0039] A plurality of springs 11 are arranged between the bottom surface of the movable support plate 14 and the base 17 at the second side of the movable support plate 14 along the length direction. In this embodiment, two springs 11 are arranged. The two springs 11 are arranged near the ends of the movable support plate 14 and are always in a compressed state.

[0040] The driving mechanism includes a stepper motor 9, which is fixed to the movable support plate through a motor fixing plate 8. The axis of the stepper motor 9 extends along the length direction of the movable support plate 14. Figure 1 shown.

[0041] The motor fixing plate 8 is a U-shaped plate structure, which is buckled on the stepper motor 9 and fixedly connected to the movable support plate 14 through the motor fixing part 10. The number of motor fixing plates 8 is selected according to the size of the stepper motor 9 to ensure that the stepper motor 9 and the movable support plate 14 are relatively fixed. The movement of the movable support plate 14 can enable the stepper motor 9 to move accordingly.

[0042] like Figure 3 As shown, the stepper motor 9 is connected to the cam 6 via the transmission shaft 7, thereby driving the cam 6 to rotate, and the axis direction of the cam 6 is parallel to the transmission shaft.

[0043] like Figure 2 As shown, under the action of the spring 11, the spring 11 can push up the second side of the movable support plate, so that the second side of the movable support plate 14 has a tendency to rise, and the stepper motor 9 is fixed on the movable support plate 14, so that the cam 6 at its output end can have a tendency to be lifted.

[0044] like Figure 1 As shown, a telescopic member is provided at the position of the cam 6 , and the top end of the telescopic member is connected via a glass plate 12 . The glass plate is located above the cam 6 and can limit the cam 6 from being continuously lifted.

[0045] Specifically, such as Figure 1 As shown, there are four telescopic members arranged along the four corners of the rectangle. The telescopic members are vertically arranged with their bottom ends fixed on the base 17 , and the top ends of the telescopic members are telescopic ends.

[0046] The telescopic member includes a sleeve, the bottom end of the sleeve is vertically fixed to the end of the base 17, a telescopic rod 3 is provided in the sleeve, the telescopic rod 3 can be telescoped up and down along the sleeve, and a locking knob 4 for locking the telescopic rod is provided on the sleeve, which can lock the telescopic rod 3 after adjusting the telescopic distance of the telescopic rod.

[0047] A threaded hole is provided on the sleeve, and the locking knob 4 can be a bolt structure. The locking knob 4 cooperates with the threaded hole, and the front end can be inserted into the sleeve to tighten the telescopic rod 3 to achieve locking.

[0048] like Figure 3-Figure 4 As shown, the top ends of four telescopic rods 3 are connected to a glass plate frame 2 , and the four corners of the glass plate frame 2 are used to be fixedly connected to the top ends of the telescopic rods 3 through plate frame fixing members 1 .

[0049] like Figure 5 As shown, the glass plate frame 2 is a rectangular frame structure with a rectangular opening on the inside. Through holes or threaded holes 13 are provided at the four corners of the glass plate frame 2, preferably through holes. Threaded holes can be provided at the top surface of the telescopic rod 3. A circle of inner support plates 22 are provided at the inner side edge of the glass plate frame 2, and the inner support plates 22 are used to support the glass plate 12.

[0050] The glass plate 12 is installed at the inner opening of the glass plate frame 2 and supported by the inner support plate 22 to achieve the installation of the glass plate.

[0051] The plate frame fixing part 1 is a bolt. Four bolts pass through the through holes at the four corners of the glass plate frame 2 and cooperate with the threaded holes on the top surface of the telescopic rod 3, so that the glass plate 12 can be set on the top of the telescopic rod 3 through the glass plate frame 2. The telescopic rod 3 can be extended and retracted up and down to adjust the height of the glass plate 12.

[0052] The glass plate 12 of this embodiment is used to always maintain an abutment state with the outer peripheral surface of the cam below it through its bottom surface, and press the cam 6 to prevent the cam 6 from continuing to rise, thereby achieving the purpose of limiting the height of the cam 6.

[0053] Considering that the cam 6 will push up the glass plate 12 to separate it from the glass plate frame 2, the pressing plate 21 can be used to press the glass plate 12.

[0054] like Figure 4 As shown, the pressing plate 21 is a long plate structure with through holes at both ends. The pressing plate 21 is used to press the glass plate 12 and is connected to the glass plate 12 frame as a whole through the plate frame fixing member 1. Specifically, after the glass plate 12 is placed on the inner support plate 22 inside the glass plate frame 2, the two long pressing plates 21 are placed on top of the glass plate, with the pressing plates 21 located on the side edges of the glass plate 12 in the longitudinal direction. The through holes on the pressing plates 21 are aligned with the corresponding through holes on the glass plate frame 2. The plate frame fixing member 1 is passed through the through holes of the pressing plates 21 and the glass plate frame 2 and is engaged with the threaded hole at the top of the telescopic rod 3 to achieve the fixing of the glass plate 12.

[0055] When the glass plate 12 needs to be replaced, the pressing plate 21 is removed and replaced with a new glass plate 12 .

[0056] The rectangular opening inside the glass plate frame 2 of this embodiment is large enough for the cam 6 to pass through, so as to ensure that the planar laser 16 can process any position on the outer peripheral surface of the cam 6.

[0057] During texturing, stepper motor 9 rotates the cam intermittently, using the rotation intervals for laser texturing. When the stepper motor rotates cam 6 at a constant speed, the extension trajectory of the planar laser texture can be linearly distributed along the outer circumference of cam 6. It is understood that the form of texture is beyond the scope of this solution. The purpose of this solution is to achieve planar laser texturing of the cam's outer surface without the use of a three-dimensional coordinate platform.

[0058] Compared with the traditional method of using chemical corrosion to process textures on curved surfaces, which is time-consuming and labor-intensive, as well as facing the dangers brought by chemical reagents, laser processing textures is simpler, safer and more efficient.

[0059] In this embodiment, the spring pushes up the movable support plate 14 so that one side of it has a tendency to rise, so that the cam 6 at the output end of the driving mechanism has a tendency to be lifted, and then the height of the glass plate 12 is limited by adjusting the height of the telescopic rod 3, so that when the spring 11 is compressed, the driving mechanism drives the cam 6 to rotate, and the bottom surface of the glass plate can always maintain abutment with the outer peripheral surface of the cam 6. The height of the bottom surface of the glass plate 12 can be used as an adjustment indicator point for the focal length of the plane laser 16, so that the focus of the focused plane laser can always act on the outer peripheral surface of the cam 6. As the cam 6 rotates, the highest position of the outer peripheral surface of the cam 6 is always in line contact with the bottom surface of the glass plate 12, and the plane laser 16 can continuously perform texture processing on the outer peripheral surface of the cam 6 at the line contact position.

[0060] The apparatus of this embodiment, comprising a telescopic member, a spring 11, a stepper motor 9, and several plate and fixing components, achieves low-cost texturing of the outer surface of the cam 6 using a planar laser 16. Compared to prior art methods that use a three-dimensional laser or a three-dimensional coordinate platform in combination with a planar laser 16 to texture the outer surface of the cam 6, this embodiment offers lower costs, a simpler structure, and a smaller footprint, thereby improving research efficiency.

[0061] Example 2

[0062] In a typical embodiment of the present invention, referring to Figures 1-6 As shown, a method for processing texture on a cam surface using a planar laser, using the device described in Example 1, includes the following steps:

[0063] First, install cam 6 so that the stepper motor 9 can drive it. Next, mount glass sheet 12 on glass frame 2 and secure it to the top of telescopic rod 3 using pressure plate 21 and frame fixture 1. Adjust the height of telescopic rod 3 to ensure that the top of cam 6 always contacts the glass sheet 12 and the spring 11 remains compressed at all times, regardless of the cam's rotation position. The height of glass sheet 12 also controls the focal length of laser beam 16, ensuring it consistently passes through the glass sheet and focuses on the cam's outer surface.

[0064] The speed of the stepper motor 9 and the texture of the laser texturing are set by the program. The stepper motor 9 drives the cam to rotate. Under the action of the spring, the movable support plate and the glass plate, the outer surface of the cam 6 is always in contact with the glass plate, and the outer surface of the cam is textured using a planar laser.

[0065] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A device for processing texture on a cam surface using a planar laser, characterized in that: include: The limiting unit includes a plurality of vertically arranged telescopic members, the top position of the telescopic members is height-adjustable and is provided with a glass plate, the bottom surface of the glass plate is used to always contact with the outer peripheral surface of the cam and indicate the focus position of the plane laser; The driving mechanism has an output end connected to a cam, which is located below the glass plate. The driving mechanism is mounted on a movable support plate, which is arranged on a base. One side of the movable support plate is rotatably matched with the base, and the other side is connected to the base through a spring. The spring pushes up one side of the movable support plate, thereby ensuring that the cam is always in contact with the bottom surface of the glass plate during rotation.

2. The device for processing texture on cam surface by using planar laser according to claim 1, characterized in that: The movable support plate has two side edges along the length direction, and the first side edge is rotatably matched with the base through a rotating shaft; a plurality of springs are arranged between the bottom surface of the movable support plate at the second side edge and the base, and the springs are always in a compressed state.

3. The device for processing texture on cam surface by using planar laser according to claim 1 or 2, characterized in that: The driving mechanism comprises a stepping motor, and the stepping motor is fixed on the movable supporting plate through a motor fixing plate.

4. The device for processing texture on cam surface by using planar laser according to claim 3, characterized in that: The stepper motor is connected to the cam via a transmission shaft to drive the cam to rotate, and the cam axis direction is parallel to the transmission shaft.

5. The device for processing texture on cam surface by using planar laser according to claim 1, characterized in that: The bottom end of the telescopic member is fixed on the base, and a plurality of telescopic members are arranged along the four corners of a rectangle. The telescopic member comprises a sleeve, a telescopic rod is arranged in the sleeve, and a locking knob for locking the telescopic rod is arranged on the sleeve.

6. The device for processing texture on cam surface by using planar laser according to claim 5, characterized in that: The top end of the telescopic rod is connected to the glass plate frame, and the four corners of the glass plate frame are used to be fixedly connected to the top end of the telescopic rod through plate frame fixing pieces.

7. The device for processing texture on cam surface by using planar laser according to claim 6, characterized in that: The glass plate frame is a frame structure with a rectangular opening on the inner side and a circle of inner support plates on the inner side edge for supporting the glass plate.

8. The device for processing texture on cam surface by using planar laser according to claim 7, characterized in that: It also includes a pressing plate, which is a long strip structure with a through hole at the end of the pressing plate. The pressing plate is used to press the glass plate and is connected to the glass plate frame as a whole through the plate frame fixing piece.

9. The device for processing texture on cam surface by using planar laser according to claim 7, characterized in that: The rectangular opening is large enough for the cam to pass through.

10. A method for processing texture on a cam surface using a planar laser, characterized in that: The device as claimed in claim 4 comprises the following steps: After the cam is installed, the telescopic part is adjusted to adjust the height of the glass plate, so that when the cam is rotated to any position, the top of the cam is always in contact with the glass plate and the spring is always in a compressed state. The plane laser focal length adjustment can be indicated according to the height of the glass plate, so that the plane laser can always pass through the glass plate and focus on the position where the cam contacts the bottom of the glass plate; the driving mechanism drives the cam to rotate, and under the action of the spring, the movable support plate and the glass plate, the outer peripheral surface of the cam is always in contact with the glass plate, and the outer peripheral surface of the cam is textured by using a plane laser.

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