Cam surface laser texture machining device based on profiling method and using method

Abstract

The invention provides a cam surface laser texture machining device based on a profiling method and a using method, a positioning unit comprises a base, a limiting column and an elastic assembly, the limiting column and the elastic assembly are both fixed to the base, the limiting column is connected with a synchronous plate of a transmission unit in an inserted mode, and the top end of the elastic assembly is fixedly connected with the synchronous plate; a stepping motor is fixed on the synchronous plate, an output shaft of the stepping motor is connected with a limiting cam transmission shaft, a limiting cam is arranged on the limiting cam transmission shaft, a driven shaft is arranged on one side of the limiting cam transmission shaft and arranged on the synchronous plate through a supporting device, a transmission wheel is arranged at one end of the driven shaft, and a cam to be machined is installed at the other end of the driven shaft; a driving wheel on an output shaft of the stepping motor drives a transmission wheel to rotate synchronously through a transmission piece, and the limiting cam and the cam to be machined are the same in structure. The limiting unit makes contact with the edge of the limiting cam. The problem that laser texturing on the surface of a cam is high in machining cost in a traditional mode is solved, and the problem that cams of different forms cannot be machined through the same equipment is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of laser texturing processing equipment, and particularly relates to a cam surface laser texturing processing device and a using method based on a profiling method. Background Technique

[0002] The statements in this part only provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] The cam-tappet contact pair is an important friction pair in the engine valve train. However, due to the high-temperature environment, severe wear is likely to occur on the surface of the friction pair, affecting the working accuracy of the entire valve train and the performance of the engine. To solve this problem, the prior art provides a surface texturing technology that can effectively reduce friction and wear, and a technology that can store lubricating oil and absorb abrasive debris. The existing surface texturing treatment methods mainly include: mechanical etching, electrical discharge machining, chemical etching, laser surface texturing, etc. Due to the irregular structure of the cam, chemical corrosion has become a common method for cam texturing processing. Compared with laser processing, chemical corrosion will spend a lot of time studying the composition, concentration, and corrosion time of the corrosion solution. The prior art provides a three-dimensional laser processing technology, but the three-dimensional laser processing has a higher cost compared to planar laser processing. If planar laser is used for cam outer peripheral surface texturing processing, the cam needs to be installed on a three-dimensional coordinate table, but the price of the three-dimensional coordinate table equipment is also high, thus increasing the processing cost. Therefore, currently, the existing laser processing technology for cam surface texturing can often only process structures of a single shape, resulting in a low processing and application ability of the equipment for different workpieces. Therefore, there is an urgent need to develop a processing device that simplifies the operation of cam surface texturing and increases the types of cams that can be processed. Summary of the Invention

[0004] In view of the above problems, the present invention provides a cam surface laser texturing processing device and a using method based on a profiling method, which solve the problem of high cost in processing cam surface laser texturing by traditional methods. At the same time, through the form of planar processing, the processing of cam surface laser texturing is realized, ensuring the overall stability of the device and solving the problem that it is difficult to improve the processing accuracy caused by this; ensuring that the laser focus is always on the cam surface to achieve uniform processing; solving the problem that the same device cannot process cams of different shapes and improving the application ability of the device.

[0005] To achieve the above object, the present invention is realized through the following technical solutions:

[0006] In a first aspect, the present invention provides a cam surface laser texturing processing device based on a profiling method, including: a positioning unit, a limiting unit, and a transmission unit; the limiting unit and the transmission unit are both arranged on the positioning unit, and the limiting unit is located on one side of the transmission unit;

[0007] The positioning unit includes a base, a limit post and an elastic component. The limit post and the elastic component are both fixedly arranged on the base. The limit post is inserted into the synchronous plate of the transmission unit, and the top end of the elastic component is fixedly connected to the synchronous plate;

[0008] The transmission unit further includes a stepper motor, a limit cam transmission shaft, a driven shaft, a support device and a transmission wheel; the stepper motor is fixedly arranged on the synchronous plate, the output shaft of the stepper motor is connected to the limit cam transmission shaft, a limit cam is arranged on the limit cam transmission shaft, the driven shaft is arranged on one side of the limit cam transmission shaft, the driven shaft is arranged on the synchronous plate through the support device, a transmission wheel is arranged at one end of the driven shaft, and a cam to be processed is detachably installed at the other end; the drive wheel on the output shaft of the stepper motor drives the transmission wheel through a transmission member, the limit cam rotates synchronously with the cam to be processed, and the limit cam has the same structure as the cam to be processed;

[0009] The positioning unit is in edge contact with the limit cam. When the limit cam rotates, the height of the positioning unit remains unchanged, and the synchronous plate floats up and down, facilitating laser processing from above the gear to be processed.

[0010] Further, the elastic component is a spring; a plurality of the springs are arranged between the base and the synchronous plate for controlling the synchronous plate to float along the limit post.

[0011] Further, at least four limit posts are provided and arranged near the four corners of the base; for guiding the synchronous plate and ensuring the stability of the synchronous plate when it floats up and down.

[0012] Further, the stepper motor is fixed on the synchronous plate through a stepper motor fixing plate. Both ends of the stepper motor fixing plate are fixedly connected to the synchronous plate through connecting pieces, and the stepper motor fixing plate is a strip-shaped flat iron or stainless steel belt.

[0013] Further, a bearing is arranged between the driven shaft and the support device, and the support device is fixedly connected to the synchronous plate through a support fixing piece.

[0014] Further, the transmission member is a chain or a synchronous toothed belt; when the transmission member is a chain, both the drive wheel and the transmission wheel are sprockets; when the transmission member is a synchronous toothed belt, both the drive wheel and the transmission wheel are synchronous belt wheels.

[0015] Further, the limiting unit is composed of a telescopic positioning rod and a horizontal limiting rod. The bottom of the telescopic positioning rod is connected to the base through a limiting fixing piece, the top of the telescopic positioning rod is connected to the horizontal limiting rod, and a positioning knob is arranged on the telescopic positioning rod for controlling the telescopic movement and fixing of the telescopic positioning rod.

[0016] Further, the base is fixed through a device positioning piece to prevent the base from jumping during operation.

[0017] In a second aspect, the present invention also provides a usage method of a cam surface laser texturing processing device based on the profiling method, including the following steps:

[0018] S1. Use the positioning knob to extend the telescopic rod so that the limiting cam is not in contact with the limiting rod;

[0019] S2. Prepare two identical cams, one as the limiting cam is installed on the transmission shaft, and the other as the processing cam is installed on the transmission shaft, and their placement orientations are the same;

[0020] S3. Lower the limiting rod so that the limiting rod is always in contact with the limiting cam;

[0021] S4. When the laser focus is on the surface of the processing cam, the control program adjusts the rotation speed of the stepping motor to process the cam to be processed.

[0022] Further, the laser processing method includes but is not limited to pulsed laser processing and continuous laser processing, and a suitable laser processing method can be selected according to the material of the cam, the processing accuracy requirements, etc.

[0023] Compared with the prior art, the advantages and positive effects of the present invention are:

[0024] The present invention realizes the processing of the cam surface laser texture through the form of plane processing, solves the problem of high cost in processing the cam surface laser texture by the traditional method. The positioning unit ensures the stability of the synchronous plate during horizontal fixing and up-and-down floating through the limiting column and multiple elastic components, avoids the inclination of the synchronous plate caused by different elastic forces of the elastic components, fixes the horizontal positions of the various components in the device, and provides a stable basis for processing; the transmission unit enables the limiting cam transmission shaft and the driven shaft to rotate synchronously through the transmission parts, and the limiting cam and the cam to be processed have the same structure and speed, ensuring that the laser processing device can uniformly process the cam to be processed; the limiting unit can control the height of the contact position between the limiting cam and the limiting rod through the telescopic positioning rod and the horizontal limiting rod, and then adjust the height of the components on the synchronous plate, so that the laser focus is always at a suitable position on the cam surface, ensuring the processing accuracy.

[0025] The processing method of the present invention is a profiling processing method, which can be applied to the processing of cams in various forms. By selecting cams with the same shape as the limit cams and using the contact path of the limit rods to simulate the shape of the limit cams, multiple cams with the same shape can be processed, improving the applicability of the device; the device structure and working principle are relatively simple, and it is convenient to clean and maintain the equipment after processing; it can be applied to various laser processing methods, including pulsed laser processing, continuous laser processing, etc., and the appropriate processing method can be selected according to the material of the cam, the processing accuracy requirements, etc., increasing the flexibility of processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings forming a part of this specification are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0027] Figure 1 It is a structural diagram of the laser texturing processing device for the cam surface of the present invention;

[0028] Figure 2 It is an axonometric view of the laser texturing processing device for the cam surface of the present invention;

[0029] Figure 3 It is a side view of the laser texturing processing device for the cam surface of the present invention;

[0030] Figure 4 It is a front view of the laser texturing processing device for the cam surface of the present invention;

[0031] Figure 5 It is a top view of the laser texturing processing device for the cam surface of the present invention.

[0032] In the figure: 1, synchronous plate; 2, elastic component; 3, device positioning member; 4, base; 5, limit column; 6, transmission wheel; 7, support and fixing member; 8, positioning knob; 9, support device; 10, bearing; 11, limit fixing member; 12, driven shaft; 13, cam to be processed; 14, telescopic positioning rod; 15, horizontal limit rod; 16, limit cam; 17, limit cam transmission shaft; 18, transmission member; 19, stepping motor; 20, stepping motor fixing plate; 21, connecting member. DETAILED DESCRIPTION OF THE INVENTION

[0033] It should be noted that the following detailed description is exemplary 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 of ordinary skill in the technical field to which the present invention belongs.

[0034] It should be noted that the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the present invention clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof;

[0035] In the traditional three-dimensional laser processing technology, when directly using three-dimensional laser processing or using planar laser to process the texture on the outer peripheral surface of the cam, the cam needs to be installed on a three-dimensional coordinate table. However, the price of the three-dimensional coordinate table equipment is also relatively high, thus increasing the processing cost. Moreover, the existing laser processing technology for processing the texture on the cam surface can often only process structures of a single shape, resulting in a low processing and application ability of the equipment for different workpieces. To address these problems, the present invention provides a cam surface laser texture processing device and a usage method based on the profiling method, which solve the problem of relatively high cost in processing the cam surface laser texture in the traditional way, and at the same time realize the processing of the cam surface laser texture through the form of planar processing; solve the problem that the same equipment cannot process cams of different shapes, and improve the applicability of the device; the present invention is described below in conjunction with the accompanying drawings through the following technical solutions.

[0036] Embodiment 1

[0037] This embodiment provides a cam surface laser texture processing device based on the profiling method, as Figures 1-5 shown, including: a positioning unit, a limiting unit, and a transmission unit; the limiting unit and the transmission unit are both arranged on the positioning unit, and the limiting unit is located on one side of the transmission unit;

[0038] The positioning unit includes a base 4, a limiting column 5, and an elastic component 2. The limiting column 5 and the elastic component 2 are both fixedly arranged on the base 4. The limiting column 5 is inserted into the synchronous plate 1 of the transmission unit, and the top end of the elastic component 2 is fixedly connected to the synchronous plate 1; the positioning unit is a mechanism for keeping the entire device horizontal, and by using the horizontal position of the fixed synchronous plate 1, the horizontal positions of each component in the device are fixed.

[0039] The transmission unit further includes a stepper motor 19, a limit cam transmission shaft 17, a driven shaft 12, a support device 9, and a transmission wheel 6; the stepper motor 19 is fixedly arranged on the synchronous plate 1, the output shaft of the stepper motor 19 is connected to the limit cam transmission shaft 17, a limit cam 16 is arranged on the limit cam transmission shaft 17, the driven shaft 12 is arranged on one side of the limit cam transmission shaft 17, the driven shaft 12 is arranged on the synchronous plate 1 through the support device 9, a transmission wheel 6 is arranged at one end of the driven shaft 12, and a cam to be processed 13 is detachably installed at the other end; a driving wheel on the output shaft of the stepper motor 19 drives the transmission wheel 6 through a transmission member 18, the limit cam 16 rotates synchronously with the cam to be processed 13, and the limit cam 16 and the cam to be processed 13 have the same structure; the transmission unit can use a transmission belt to make the limit cam transmission shaft 17 and the driven shaft 12 rotate synchronously, so that the processing cam and the limit cam 16 rotate at the same speed; the support device 9 is responsible for fixing the position of the transmission shaft on the synchronous plate 1.

[0040] The limit unit is in edge contact with the limit cam 16. When the limit cam 16 rotates, the height of the limit unit remains unchanged, and the synchronous plate 1 floats up and down, facilitating laser processing from above the gear to be processed.

[0041] Specifically, the limit cam 16 and the cam to be processed 13 have exactly the same shape. The height of the contact position between the limit cam 16 and the limit rod is restricted by the limit rod, thereby affecting the height of each component on the synchronous plate 1; when installing the cam, the direction of the cam is made the same as that of the limit cam 16, so that the two can rotate synchronously, thus meeting the requirement that the laser focus is always on the surface of the cam.

[0042] Further, the elastic component 2 is a spring; a plurality of the springs are arranged between the base 4 and the synchronous plate 1 for controlling the synchronous plate 1 to float along the limit posts 5. At least four limit posts 5 are arranged and are arranged near the four corners of the base 4; for guiding the synchronous plate 1 and ensuring the stability of the synchronous plate 1 when it floats up and down.

[0043] Specifically, a plurality of springs are arranged in the limit unit, and an upward thrust is provided to the synchronous plate 1 through the springs; the limit posts 5 ensure the up and down movement of the synchronous plate 1 in the vertical direction, and at the same time, at least four limit posts 5 prevent the synchronous plate 1 from tilting due to different spring elastic forces when the synchronous plate 1 floats up and down; the limit rod controls the height of the synchronous plate 1 by controlling the height of the cam.

[0044] Further, the stepping motor 19 is fixed on the synchronization plate 1 through a stepping motor fixing plate 20. Both ends of the stepping motor fixing plate 20 are fixedly connected to the synchronization plate 1 through connecting members 21. The stepping motor fixing plate 20 is a strip-shaped flat iron or stainless steel strip. These two methods can ensure that the limiting cam 16 and the cam to be processed 13 rotate synchronously. Since the limiting cam 16 and the cam to be processed 13 have the same structure, the transmission unit can use a transmission belt to make the limiting cam transmission shaft 17 and the driven shaft 12 rotate synchronously, so that the processing cam and the limiting cam 16 rotate at the same speed, and further enable the laser processing device to uniformly process the cam to be processed 13.

[0045] The above content belongs to a profiling machining method, which can be applied to machining cams of various shapes. A cam with the same shape is selected as the limiting cam 16, and the shape of the limiting cam 16 can be simulated through the contact path of the limiting rod, and then multiple cams with the same shape as it can be machined, thereby further improving the applicability of the device of the present invention.

[0046] Further, a bearing 10 is provided between the driven shaft 12 and the support device 9, and the support device 9 is fixedly connected to the synchronization plate 1 through a support fixing member 7.

[0047] Further, the transmission member 18 is a chain or a synchronous toothed belt; when the transmission member 18 is a chain, both the driving wheel and the transmission wheel 6 are sprockets; when the transmission member 18 is a synchronous toothed belt, both the driving wheel and the transmission wheel 6 are synchronous pulleys.

[0048] Further, the limiting unit is composed of a telescopic positioning rod 14 and a horizontal limiting rod 15. The bottom of the telescopic positioning rod 14 is connected to the base 4 through a limiting fixing member 11. The top of the telescopic positioning rod 14 is connected to the horizontal limiting rod 15. A positioning knob 8 is provided on the telescopic positioning rod 14 for controlling the telescopic movement and fixation of the telescopic positioning rod 14.

[0049] Further, the base 4 is fixed through a device positioning member 3 to prevent the base 4 from jumping during operation.

[0050] Embodiment 2

[0051] This embodiment also provides a usage method of a cam surface laser texturing processing device based on the profiling method, including the following steps:

[0052] S1. Use the positioning knob 8 to extend the telescopic rod so that the limiting cam 16 is not in contact with the limiting rod;

[0053] S2. Prepare two identical cams. One is installed on the transmission shaft as the limit cam 16, and the other is installed on the transmission shaft as the machining cam, and their placement orientations are the same;

[0054] S3. Lower the limit rod so that the limit rod is always in contact with the limit cam 16; specifically, by adjusting the height of the telescopic positioning rod 14 in the limit unit, the height of the contact position between the limit cam 16 and the limit rod is restricted by the limit rod, and then the heights of the various components on the synchronous plate 1 are adjusted to ensure that the laser focus can be at a suitable position on the cam surface;

[0055] S4. When the laser focus is on the surface of the machining cam, the control program adjusts the rotation speed of the stepping motor 19 to machine the cam 13 to be machined; specifically, check whether the components of the stepping motor 19 and the transmission unit are normal to ensure that the limit cam 16 and the cam 13 to be machined can rotate synchronously; start the stepping motor 19, the stepping motor 19 drives the limit cam transmission shaft 17 to rotate, and through the transmission member 18, the driven shaft 12 rotates synchronously, thereby driving the cam 13 to be machined and the limit cam 16 to rotate at the same speed; during the rotation, the limit cam 16 contacts the limit unit. Since the height of the limit unit remains unchanged when the limit cam 16 rotates, the synchronous plate 1 floats up and down. At this time, the laser processes from above the cam 13 to be machined, and the shape of the limit cam 16 and the contact path of the limit rod are used to simulate the machining shape, realizing the laser texturing processing of the cam surface; after the processing is completed, turn off the equipment such as the stepping motor 19, remove the cam 13 to be machined, and clean and maintain the equipment for the next use. Further, the laser processing method includes but is not limited to pulsed laser processing and continuous laser processing, and a suitable laser processing method can be selected according to the material of the cam, the processing accuracy requirements, etc.

[0056] Although the specific implementation manners of the present invention are described above in conjunction with the accompanying drawings, it is not a limitation to the protection scope of the present invention. Those skilled in the art should understand that based on the technical solutions of the present invention, various modifications or deformations that can be made by those skilled in the art without creative efforts are still within the protection scope of the present invention.

Claims

1. A cam surface laser texturing processing device based on profiling method, characterized in that: The invention comprises: a positioning unit, a limiting unit and a transmission unit; the limiting unit and the transmission unit are both arranged on the positioning unit, and the limiting unit is located on one side of the transmission unit; The positioning unit includes a base, a limiting column and an elastic component, the limiting column and the elastic component are both fixedly arranged on the base, the limiting column is plugged into the synchronous plate of the transmission unit, and the top end of the elastic component is fixedly connected to the synchronous plate; The transmission unit further comprises a stepper motor, a limit cam transmission shaft, a driven shaft, a supporting device and a transmission wheel; the stepper motor is fixedly arranged on the synchronous plate, the output shaft of the stepper motor is connected to the limit cam transmission shaft, a limit cam is arranged on the limit cam transmission shaft, the limit cam transmission shaft is provided with the driven shaft on one side of the limit cam transmission shaft, the driven shaft is arranged on the synchronous plate through the supporting device, a transmission wheel is arranged at one end of the driven shaft, and a cam to be processed is detachably installed at the other end; the driving wheel on the output shaft of the stepper motor drives the transmission wheel through a transmission member, the limit cam rotates synchronously with the cam to be processed, and the limit cam has the same structure as the cam to be processed; The limiting unit contacts the edge of the limiting cam. When the limiting cam rotates, the height of the limiting unit remains unchanged, and the synchronous plate floats up and down, which facilitates the laser to process the gear to be processed from above.

2. The cam surface laser texturing processing device based on the profiling method according to claim 1, characterized in that: The elastic component is a spring; a plurality of the springs are arranged between the base and the synchronous plate, and are used to control the synchronous plate to float along the limiting column.

3. The cam surface laser texturing processing device based on the profiling method as claimed in claim 2, characterized in that: At least four limit columns are provided and arranged near the four corners of the base; they are used to guide the synchronous plate and ensure the stability of the synchronous plate when floating up and down.

4. The cam surface laser texturing processing device based on the profiling method according to claim 1, characterized in that: The stepper motor is fixed to the synchronous plate via a stepper motor fixing plate, both ends of the stepper motor fixing plate are fixedly connected to the synchronous plate via connecting pieces, and the stepper motor fixing plate is a strip of flat iron or a stainless steel belt.

5. The cam surface laser texturing processing device based on the profiling method according to claim 1, characterized in that: A bearing is arranged between the driven shaft and the supporting device, and the supporting device is fixedly connected to the synchronous plate via a supporting fixing member.

6. The cam surface laser texturing processing device based on the profiling method according to claim 1, characterized in that: The transmission member is a chain or a synchronous toothed belt; when the transmission member is a chain, the driving wheel and the transmission wheel are both sprockets; when the transmission member is a synchronous toothed belt, the driving wheel and the transmission wheel are both synchronous pulleys.

7. The cam surface laser texturing processing device based on the profiling method according to claim 1, characterized in that: The limiting unit consists of a telescopic positioning rod and a horizontal limiting rod. The bottom of the telescopic positioning rod is connected to the base through a limiting fixing piece, and the top of the telescopic positioning rod is connected to the horizontal limiting rod. A positioning knob is provided on the telescopic positioning rod for controlling the telescopic movement and fixation of the telescopic positioning rod.

8. The cam surface laser texturing processing device based on the profiling method as claimed in claim 1, characterized in that: The base is fixed by means of a device positioning piece to prevent the base from jumping during operation.

9. A method for using a cam surface laser texturing processing device based on a profiling method as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Use the positioning knob to extend the telescopic rod so that the limit cam does not contact the limit rod; S2. Prepare two identical cams, one as a limit cam mounted on the transmission shaft, and the other as a processing cam mounted on the transmission shaft, and the two are placed in the same orientation; S3. Lower the limit rod so that the limit rod is always in contact with the limit cam; S4. When the laser focus is on the surface of the processing cam, the control program adjusts the speed of the stepper motor to process the cam to be processed.

10. The method for using the cam surface laser texturing processing device based on the profiling method as claimed in claim 9, characterized in that: The laser processing method includes but is not limited to pulse laser processing and continuous laser processing, and a suitable laser processing method can be selected according to the material of the cam, processing accuracy requirements, etc.

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