Roll shaft knife line cladding processing system based on roll shaft fitting positioning

Abstract

The invention provides a roll shaft knife line cladding processing system based on roll shaft fitting positioning, the roll shaft knife line cladding processing system comprises a central processor, a measuring module, a cladding head and a four-axis laser cladding machine tool, the measuring module and the cladding head are connected to the four-axis laser cladding machine tool, and the four-axis laser cladding machine tool is provided with a roll shaft clamping device. The measuring module, the cladding head and the four-axis laser cladding machine tool are all connected with the central processing unit, the measuring module is used for collecting position information of a measuring point on the surface of a roll shaft and transmitting the position information to the central processing unit, and the central processing unit is used for transmitting the processed position information to the four-axis laser cladding machine tool and the cladding head; the four-axis laser cladding machine tool and the cladding head receive the signal and then carry out cutter line cladding processing on the roll shaft, and the central processing unit comprises a target measuring unit, an error eliminating unit, an actual position positioning unit and a cladding control unit.

Description

Technical Field

[0001] The present invention relates to the field of roll cutter processing by laser cladding, and particularly to a roll cutter blade cladding processing system based on roll shaft fitting and positioning. Background Art

[0002] As an advanced surface modification and additive manufacturing technology, laser cladding has received extensive attention and application in industrial production in recent years. Laser cladding uses a high-energy laser beam as a heat source to rapidly melt the pre-placed or synchronously fed cladding material and form a metallurgical bond with the surface of the substrate metal, thereby forming a cladding layer with specific properties on the substrate surface.

[0003] Compared with traditional surface modification technologies such as thermal spraying and electroplating, laser cladding technology has advantages such as small dilution rate, small heat input, and metallurgical bond at the interface. Laser cladding can achieve a high-strength metallurgical bond between the coating and the substrate. The cladding layer has a dense and uniform structure, and its composition and properties can be precisely controlled, which can significantly improve the hardness, wear resistance, corrosion resistance, and high-temperature performance of the material surface. It shows great application potential in many key fields such as aerospace, automotive manufacturing, energy and power, and mold repair, providing an effective technical means for the surface strengthening and repair of high-end components and can be widely applied in different industries.

[0004] A roll cutter is a tool used for cutting, slitting, or processing materials, and its main feature is that the cutter is cylindrical or roller-shaped. It generally consists of two parts: a cutter body and a cutting edge. The cutter body is the main part of the roll cutter, usually made of metal materials such as steel or cemented carbide, etc., to provide sufficient strength and support. The cutting edge is the part that directly contacts the material to be processed, and its shape, sharpness, and material quality directly affect the cutting effect. Roll cutters are important tools for material cutting, forming, and indentation in the manufacturing industry and are widely used in industries such as packaging, printing, and electronic component manufacturing.

[0005] Laser cladding technology has been applied to the processing of roll cutter blade lines. The patent with the publication number CN104647474B discloses a method for forming a die roller and its cutting edge of a rotary die-cutting device. This patent uses laser cladding technology to manufacture the cutting edge part of the die roller of the rotary die-cutting device. The processed die roller achieves metallurgical bonding of different materials, has a small dilution rate, maintains the hardness and wear resistance of the cutting edge material, as well as the toughness of the substrate material, and the combination between the two is good. However, the positioning method used in this processing process is not clear. Most traditional laser cladding shaft parts use a dial indicator to correct and position the clamping position, which takes a long time and results in low processing efficiency.

[0006] In order to improve the cladding efficiency and automation level of roll cutters and reduce the time for correcting and clamping positions, the present invention proposes a new type of four-axis roll cutter blade laser cladding processing equipment. Summary of the Invention

[0007] Based on this, it is necessary to provide a roller blade cladding processing system based on roller fitting and positioning.

[0008] To solve the above technical problems, the present invention provides a roller blade cladding processing system based on roller fitting and positioning, including a central processor, a measurement module, a cladding head, and a four-axis laser cladding machine tool. The measurement module and the cladding head are connected to the four-axis laser cladding machine tool. A roller clamping device is provided on the four-axis laser cladding machine tool. The measurement module, the cladding head, and the four-axis laser cladding machine tool are all connected to the central processor. The measurement module is used to collect the position information of the measurement points on the surface of the roller and transmit the position information to the central processor. The central processor is used to transmit the processed position information to the four-axis laser cladding machine tool and the cladding head. After receiving the signal, the four-axis laser cladding machine tool and the cladding head perform blade cladding processing on the roller. The central processor includes:

[0009] Target measurement unit: used to receive the position information of the measurement points collected by the measurement module, and use the position information of the measurement points to fit the geometric information of the roller;

[0010] Fitting and positioning unit: used to receive the measurement positions of the measurement points detected by the target measurement unit, and execute a fitting and positioning algorithm to calculate the actual clamping position of the roller. The actual clamping position refers to the first contact position between the roller clamping device and the first end of the roller, and the second contact position with the second end of the roller;

[0011] Coordinate conversion unit: used to receive the coordinates of the actual position of the roller in the original coordinate system, use the actual central axis of the fitted roller as the Z-axis to generate a new coordinate axis, convert the coordinate data of the original coordinate system into the coordinate data of the new coordinate system, and obtain the coordinates of the actual clamping position;

[0012] Cladding control unit: used to control the start and stop of the cladding head, and synchronously control the four-axis laser cladding machine tool.

[0013] Preferably, the measurement module is a measurement probe.

[0014] Preferably, the head of the measurement probe is a ruby ball with a diameter of 2.0 mm. The ruby measurement probe mainly includes a ruby ball head, a probe rod, and a connection interface. The ruby measurement probe contacts the surface of the roller through the ruby ball head to measure the geometric dimensions, shape, and position tolerance of the roller.

[0015] Preferably, the four-axis laser cladding machine tool includes a base and a gantry. The gantry is located above the base. The roller clamping device is slidably arranged on the base. The roller clamping device includes a turntable slidably arranged on the base in a first direction. A chuck and a center drill for fixing the roller are rotatably arranged on the turntable. The chuck and the center drill are respectively located at both ends of the turntable.

[0016] Preferably, the gantry is provided with a lifting slide table through a reciprocating lifting device. A translation slide table is arranged on the lifting slide table through a reciprocating translation device. The cladding head is connected to the translation slide table. The cladding head is located above the turntable.

[0017] Preferably, the chuck is a three-jaw chuck and the center drill is a rotary center drill.

[0018] Preferably, the roller is a cylindrical roller.

[0019] Preferably, the roller blade line cladding processing system further includes a laser generator, a power voltage stabilizer, an automatic powder feeder, and a water cooling system. The laser generator, the power voltage stabilizer, the automatic powder feeder, and the water cooling system are all electrically connected to the central processor.

[0020] Advantages of the present invention: The present invention proposes a novel four-axis roller cutter blade line processing system based on laser cladding technology. By adding a ruby measurement probe and a system, geometric information of the roller and three-dimensional coordinates of measurement points on the roller surface can be obtained. Through the measured coordinates, cylindrical fitting and coordinate transformation can be performed to obtain coordinate information of the actual clamping position of the roller. This system does not require the use of a dial indicator to correct and position the clamping position, thereby greatly improving the cladding efficiency of the roller cutter blade line, ensuring the cladding effect at the same time, making the processing cost of the roller cutter blade line lower, and having higher automation and processing efficiency. Description of the Drawings

[0021] Specifically illustrated by the preferred embodiments of the present invention shown in the drawings, the above-mentioned and other objects, features, and advantages of the present invention will become clearer. The same reference numerals indicate the same parts in all the drawings, and the drawings are not deliberately drawn to scale in actual size, with the emphasis on showing the gist of the present invention.

[0022] Figure 1 It is a schematic structural diagram of the system of the preferred embodiment of the present invention;

[0023] Figure 2 It is a schematic structural diagram of the four-axis laser cladding machine tool of the preferred embodiment of the present invention from the front perspective;

[0024] Figure 3 It is a schematic diagram of the ruby probe measurement when the roller is clamped in the preferred embodiment of the present invention;

[0025] Figure 4 It is a schematic diagram of the principle for fitting the actual positions of the measuring device and the roller shaft in the original coordinate system;

[0026] Figure 5 It is a schematic diagram of the ruby measuring probe in the preferred embodiment of the present invention;

[0027] In the figure: laser generator 1; power stabilizer 2; automatic powder feeder 3; four-axis laser cladding machine tool 4; water cooling system 5; control computer 6; laser cladding head 7; powder feeding head 8; measuring module 9; roller shaft 10; gantry 12; translation slide 13; lifting slide 15; base 16; turntable 17; chuck 20; rotary center 21. Detailed implementation manners

[0028] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.

[0029] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element and integrated with it, or there may be an intermediate element at the same time. The terms "installed", "one end", "the other end" and similar expressions used herein are only for the purpose of illustration.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this technology belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0031] Reference Figures 1 - 5 , the present invention provides a roller shaft tool line cladding processing system based on roller shaft fitting and positioning, including a central processor, a measuring module, a cladding head and a four-axis laser cladding machine tool. The measuring module and the cladding head are connected to the four-axis laser cladding machine tool. A roller shaft clamping device is provided on the four-axis laser cladding machine tool. The measuring module, the cladding head and the four-axis laser cladding machine tool are all connected to the central processor. The measuring module is used to collect the position information of the measuring points on the surface of the roller shaft and transmit the position information to the central processor. The central processor is used to transmit the processed position information to the four-axis laser cladding machine tool and the cladding head. After receiving the signal, the four-axis laser cladding machine tool and the cladding head perform tool line cladding processing on the roller shaft. The central processor includes:

[0032] Target measurement unit: used to receive the position information of the measurement points collected by the measurement module, and fit the geometric information of the roller shaft by using the position information of the measurement points;

[0033] Fitting and positioning unit: It is used to receive the measured positions of the measurement points detected by the target measurement unit, and execute a fitting and positioning algorithm to calculate the actual clamping position of the roller shaft. The actual clamping position refers to the first contact position between the roller shaft clamping device and the first end of the roller shaft, and the second contact position with the second end of the roller shaft. The first contact position is the contact position between the chuck 20 and the roller shaft, and the second contact position is the contact position between the rotary center drill 21 and the roller shaft. The first contact position and the second contact position form the actual rotation center axis of the roller shaft clamping.

[0034] Receive the measured positions of the measurement points detected by the target measurement unit, construct an error function based on the error value existing between the measured positions of the measurement points and the actual radius of the roller shaft, perform iterative calculations on the error function, solve for the equation parameter values when the error value is the smallest, so as to obtain the coordinates of the actual position of the roller shaft in the original coordinate system after eliminating the measurement error;

[0035] Coordinate conversion unit: It is used to receive the coordinates of the actual position of the roller shaft in the original coordinate system, use the actually fitted center axis of the roller shaft as the Z-axis to generate a new coordinate axis, convert the original coordinate system coordinate data into the coordinate data of the new coordinate system, and obtain the coordinates of the actual clamping position;

[0036] Cladding control unit: It is used to control the start and stop of the cladding head, and synchronously control the four-axis laser cladding machine tool.

[0037] In a preferred embodiment, the measurement module 9 is a measurement probe.

[0038] In a preferred embodiment, the head of the measurement probe is a ruby ball with a diameter of 2.0 mm. The ruby measurement probe mainly includes a ruby ball head, a probe rod and a connection interface. The ruby measurement probe contacts the surface of the roller shaft through the ruby ball head to measure the geometric dimensions, shape and position tolerances of the roller shaft.

[0039] In a preferred embodiment, the four-axis laser cladding machine tool includes a base 16 and a gantry 12. The gantry is located above the base. The roller shaft clamping device is slidably arranged on the base 16. The roller shaft clamping device includes a turntable 17 slidably arranged on the base 16 in a first direction. A chuck and a center drill for fixing the roller shaft are rotatably arranged on the turntable. The chuck and the center drill are respectively located at both ends of the turntable.

[0040] In a preferred embodiment, the gantry is provided with a lifting slide 15 through a reciprocating lifting device. A translation slide 13 is arranged on the lifting slide through a reciprocating translation device. The cladding head is connected to the translation slide, and the cladding head is located above the turntable.

[0041] In a preferred embodiment, the chuck is a three-jaw chuck, and the center drill is a rotary center drill.

[0042] In a preferred embodiment, the roller shaft is a cylindrical roller shaft.

[0043] In a preferred embodiment, the roller shaft tool line cladding processing system further includes a laser generator, a power stabilizer, an automatic powder feeder, and a water cooling system. The laser generator, the power stabilizer, the automatic powder feeder, and the water cooling system are all electrically connected to the central processor.

[0044] The present invention reduces the calibration time of the clamping position of the roller cutter: By using a ruby measurement probe and combining the technologies of cylinder fitting and coordinate transformation, the actual clamping position of the roller shaft can be accurately fitted, and compared with the traditional use of a dial indicator, the calibration time of the clamping position of the roller cutter is significantly reduced.

[0045] The present invention improves the production efficiency and automation level: Compared with the traditional laser cladding technology, the laser cladding technology combined with a ruby measurement probe can reduce the processing time of the tool line of the roller cutter, improve the production efficiency and automation level of the tool line of the roller cutter, and thus reduce the production cost.

[0046] The present invention proposes a new type of four-axis roller cutter tool line processing equipment based on laser cladding technology. This equipment does not need to use a dial indicator to calibrate and position the clamping position. By adding a ruby measurement probe and equipment, the geometric information of the roller shaft and the three-dimensional coordinates of the measurement points on the surface of the roller shaft can be obtained. Through the measurement coordinates, cylinder fitting and coordinate transformation can be carried out to obtain the coordinate information of the actual clamping position of the roller shaft. Coupled with the independently developed path planning system, a cladding path with path compensation can be automatically generated, and a tool line pattern with a complex design can be cladded on the surface of the roller cutter. Through the optimization of materials and processes, the cladding efficiency of the tool line of the roller cutter can be improved, while ensuring the cladding effect, making the processing cost of the tool line of the roller cutter lower, and the automation level and processing efficiency higher.

[0047] Preferably, the roller shaft tool line cladding processing system of the present invention includes: a laser generator 1, a power stabilizer 2, an automatic powder feeder 3, a four-axis laser cladding machine tool 4, a water cooling system 5, and a control computer 6.

[0048] Among them, the laser generator 1 mainly provides a high-power and high-stability laser source for the whole equipment, and can output a laser beam suitable for powder material cladding. Its power is adjusted according to different cladding powder materials and process requirements to ensure stable and accurate energy input during the cladding process.

[0049] The function of the power stabilizer 2 is to stabilize the power supply voltage with large fluctuations and not meeting the requirements of the whole set of equipment within the set value range, so that the whole set of equipment can work normally under the rated working voltage.

[0050] The main function of the automatic powder feeder 3 is to supply the powder material required during the laser cladding process. Based on the principle of gas dynamics, due to its own gravity, the powder falls from the powder cylinder through the powder inlet block into the grooves of the turntable. The motor drives the powder tray to rotate, and a protective gas is filled through the inlet pipe. The powder is sent to the surface of the sample through gas pressure and is melted by the laser and then cladded on the surface of the sample.

[0051] The four-axis laser cladding machine tool 4 includes a laser cladding head 7, a powder feeding head 8, a measurement module 9, and a four-axis motion platform.

[0052] Among them, the laser cladding head 7 usually consists of a collimating mirror and a focusing mirror. The collimating mirror converts the divergent beam output by the laser into a parallel beam, and the focusing mirror focuses the parallel beam onto the surface of the workpiece to be cladded, making the laser energy highly concentrated to form a tiny molten pool, so as to achieve the precise melting and solidification of the cladding material.

[0053] The powder feeding head 8 ensures that the powder can enter the molten pool evenly and stably, avoiding powder agglomeration, blockage, or uneven distribution. The powder feeding method used is coaxial powder feeding. Coaxial powder feeding sends the powder through the powder feeding channel surrounding the laser beam, so that the powder can be more evenly distributed in the molten pool under the action of the laser. This method is widely used in most laser cladding processes, especially suitable for cladding processing of complex shapes.

[0054] The schematic diagram of the ruby measurement module 9 is shown in the figure. The ruby measurement probe mainly includes a ruby ball head 91, a probe rod 92, and a connection interface 93. The ruby measurement probe contacts the surface of the workpiece through the ruby ball head to measure its geometric dimensions, shape, and position tolerance. During measurement, the probe rod transmits the contact force to the sensor, and the sensor converts the displacement signal into an electrical signal, and finally generates a measurement result through the data processing system. In this equipment, it is mainly used to measure the geometric information of the roller shaft and the three-dimensional coordinate information of the measurement points on the surface, so as to generate a compensated planning path in the software. Compared with the traditional method of using a dial indicator to adjust the clamping position of the roller shaft, using the measurement probe saves a lot of time and improves the efficiency of roller cutter cladding.

[0055] The four-axis motion platform has the motion ability of four degrees of freedom, including the X-axis, Y-axis, Z-axis, and rotation axis (B-axis). Specifically, referring to Figure 2 , the translation guide rail 11 (i.e., the guide rail in the X-axis direction) is arranged on the cross beam of the gantry 12. A translation slide 13 is arranged on the translation guide rail 11. Both the laser cladding head 7 and the measurement probe 8 are arranged on the translation slide 13, and the laser cladding head 7 and the measurement probe 8 can move along the X-axis direction simultaneously with the translation slide 13.

[0056] The translation stage 13 is provided with a lifting guide rail 14 (i.e., the guide rail in the Z-axis direction) and a lifting stage 15. The lifting stage 15 is provided with a laser cladding head 7 and a measuring probe 8. The laser cladding head 7 and the measuring probe 8 can simultaneously move along the Z-axis direction with the translation stage 13.

[0057] A turntable 17 is arranged on the base 16. The turntable 17 can move along the Y-axis direction on the base 16 through the cooperation of a telescopic stage 18 and a telescopic guide rail 19. Refer to Figure 3 , a three-jaw chuck 20 and a corresponding rotary center 21 are arranged on the turntable to clamp and fix the roller shaft 10. The turntable 17 is used to drive the roller cutter to rotate around its own axis, realizing stable and precise rotation control of the roller cutter, and can adjust the angle of the roller cutter according to the design requirements of the tool path during the cladding process to ensure uniform cladding and high-quality forming of the tool path.

[0058] The water cooling system 5 mainly sets water cooling channels in the laser generator 1, the laser cladding head 7 and the powder feeding head 8 to control the working temperature during laser cladding, prevent equipment failures or safety accidents caused by overheating, and ensure the safe and stable operation of the system.

[0059] The control computer 6 is mainly used to generate measurement programs for the probe and G-codes for the machine tool. Using the developed special roller cutter path planning software, the cladding path of the tool path can be automatically planned according to the input laser cladding parameters, and the corresponding G-codes can be generated to achieve precise and stable cladding of the tool path.

[0060] Among them, the central processing unit is located on the control computer 6. For a better understanding of the application of the present invention, the following is a specific application example:

[0061] 1). Before the equipment runs, the operator preprocesses the tool path pattern through the operation computer 6 according to the requirements of the roller cutter tool path pattern to make the pattern meet the requirements of the path planning software.

[0062] 2). Input the corresponding parameters in the roller cutter tool path planning software, including information such as the starting position of the tool path, the thickness of the cladding layer, etc., and the process parameters of laser cladding, such as laser power, scanning speed, powder feeding rate, etc.

[0063] 3). Turn on the switches of the power voltage stabilizer 2, the laser generator 1, the automatic powder feeder 3, the four-axis laser cladding machine tool 4 and the water cooling system 5 respectively to ensure the normal operation of the whole system.

[0064] 4). Feed the dried powder into the automatic powder feeder 3. After grinding and cleaning the surface of the roller shaft 10 to be clad, use the three-jaw chuck 20 and the corresponding rotary center 21 to fix the roller shaft 10.

[0065] 5). Select the corresponding measurement program in the laser cladding machine tool 4 to measure the radius of the roller shaft 10 and the three-dimensional coordinate information of the measurement points on the surface of the roller shaft.

[0066] 6). Read the corresponding measurement data in the roller cutter tool path planning software, perform cylindrical fitting and coordinate transformation for the actual clamping position of the roller shaft, perform motion trajectory planning after obtaining the coordinates of the actual clamping position of the roller shaft, calculate the motion paths and speeds of each axis of the four-axis motion system, and add the working parameters of the laser cladding system to generate the G code for the corresponding path of the pattern.

[0067] 7). Select and execute the corresponding G code in the laser cladding machine tool 4, and wait for the completion of the laser cladding process according to the program control. After the cladding process is completed, remove the roller shaft 10 from the three-jaw chuck 20 and the rotary center 21, and perform subsequent finishing of the cutting edge of the tool path and subsequent performance testing.

[0068] Through the above specific application examples, it is shown that the four-axis roller cutter tool path laser cladding equipment of the present invention improves the efficiency of roller cutter tool path cladding and reduces the time of roller cutter tool path cladding by combining a ruby probe. The generated roller cutter tool path can achieve good metallurgical bonding with the base material, ensuring the quality of the cladded tool path. Generally speaking, the present invention provides an improved and innovative production equipment for the roller cutter manufacturing industry, which can improve the manufacturing accuracy and production efficiency of roller cutter tools and provide solutions for the processing of roller cutters made of various materials, having broad application prospects.

[0069] Appendix Figure 4 It is a schematic diagram of the principle of the fitting positioning algorithm. After the three-jaw chuck 22 and the rotary center 23 fix the roller shaft 10, select the corresponding measurement program in the laser cladding machine tool, use the measurement probe 9 to measure the circumferential surface information of the roller shaft 10, and fix the roller shaft 10 on the turntable using the three-jaw chuck 22 and the rotary center 23. The measurement points in the circumferential direction are evenly distributed to accurately fit the circular cross-section of the cylinder. The positions of 4 circumferences are evenly distributed in the axial direction of the roller shaft, and each circumferential surface is provided with 12 measurement points, with a total of 48 measurement point data. Set a point C(x0, y0, z0) on the central axis of the cylinder, the radius r of the cylinder, and any point P(x, y, z) in space. The cylindrical surface of the roller shaft can be regarded as a set of points in space whose distance to the central axis of the cylinder is equal to the radius r of the cylinder. There will be an error value between the distance L from the point P(x, y, z) to the central axis of the cylinder and the radius of the cylinder. Then the error between the distance from the i-th measurement point to the central axis of the cylinder and the radius of the cylinder is d i = L - r.

[0070] Read the data of the measurement points on the circumference of the reading roller. Using the initial radius value r of the roller, the center coordinates of the bottom surface of the roller, and the Z-axis direction vector as the initial values of the error function, substitute the data and coordinates of the measurement points into the error function respectively. Use the Levenberg-Marquardt algorithm to solve the equation parameter values of the fitted cylindrical surface. The initial values used in the iterative calculation are the initial radius value r of the roller, the center coordinates of the bottom surface of the roller, and the Z-axis direction vector. Iterate until the convergence threshold or the number of iterations is met, optimize r, C, vρ, so that the error function has a minimum value, and obtain the optimal solution of the parameters. When the error function has a minimum value, the data fitted according to the measurement data is closest to the actual value. At this time, the central axis of the roller is the actual clamping position.

[0071] In this application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0072] In the description of this specification, the descriptions referring to terms such as "preferred embodiment", "another embodiment", "other embodiments" or "specific examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0073] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A roll cutter line cladding processing system based on roll fitting positioning, characterized in that It includes a central processing unit, a measurement module, a cladding head and a four-axis laser cladding machine tool. The measurement module and the cladding head are connected to the four-axis laser cladding machine tool. A roller clamping device is provided on the four-axis laser cladding machine tool. The measurement module, the cladding head and the four-axis laser cladding machine tool are all connected to the central processing unit. The measurement module is used to collect the position information of the measurement points on the surface of the roller and transmit the position information to the central processing unit. The central processing unit is used to transmit the processed position information to the four-axis laser cladding machine tool and the cladding head. After receiving the signal, the four-axis laser cladding machine tool and the cladding head perform knife-line cladding processing on the roller. The central processing unit includes: A target measurement unit: used to receive the position information of the measurement points collected by the measurement module, and fit the geometric information of the roller using the position information of the measurement points; A fitting and positioning unit: used to receive the measurement positions of the measurement points detected by the target measurement unit, and execute a fitting and positioning algorithm to calculate the actual clamping position of the roller. The actual clamping position refers to the first contact position between the roller clamping device and the first end of the roller, and the second contact position with the second end of the roller. A coordinate conversion unit: used to receive the coordinates of the actual position of the roller in the original coordinate system, generate a new coordinate axis using the actual central axis of the fitted roller as the Z axis, and convert the coordinate data of the original coordinate system into the coordinate data of the new coordinate system to obtain the coordinates of the actual clamping position; A cladding control unit: used to control the start and stop of the cladding head and synchronously control the four-axis laser cladding machine tool.

2. The roll cutter wire cladding processing system according to claim 1, characterized in that The measurement module is a measurement probe.

3. The roller cutter wire cladding processing system according to claim 2, wherein, The head of the measurement probe is a ruby ball with a diameter of 2.0 mm. The ruby measurement probe mainly includes a ruby ball head, a probe rod and a connection interface. The ruby measurement probe contacts the surface of the roller through the ruby ball head to measure the geometric dimensions, shape and position tolerance of the roller.

4. The roll cutter wire cladding processing system according to claim 1, characterized in that The four-axis laser cladding machine tool includes a base and a gantry. The gantry is located above the base. The roller clamping device is slidably arranged on the base. The roller clamping device includes a turntable slidably arranged on the base in a first direction. A chuck and a center drill for fixing the roller are rotatably arranged on the turntable. The chuck and the center drill are respectively located at both ends of the turntable.

5. The roller cutter wire cladding processing system according to claim 4, characterized in that, The gantry is provided with a lifting slide through a reciprocating lifting device. A translation slide is arranged on the lifting slide through a reciprocating translation device. The cladding head is connected to the translation slide. The cladding head is located above the turntable.

6. The roller cutter wire cladding processing system according to claim 4, characterized in that, The chuck is a three-jaw chuck, and the center drill is a rotary center drill.

7. The roll cutter wire cladding processing system according to claim 1, characterized in that, The roller is a cylindrical roller.

8. The roll cutter line cladding processing system according to claim 1, characterized in that, The roller knife-line cladding processing system further includes a laser generator, a power voltage stabilizer, an automatic powder feeder and a water cooling system. The laser generator, the power voltage stabilizer, the automatic powder feeder and the water cooling system are all electrically connected to the central processing unit.

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