Positioning device of plasma cutting machine
By designing the positioning device of the hoop, pressure sensor, roller and camera on the plasma cutting machine, the insufficient accuracy and adjustment difficulties in positioning and dynamic cutting are solved, and high-precision and efficient cutting effects are achieved.
Patent Information
- Application Number
- CN202421739905.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-23
AI Technical Summary
Existing plasma cutting machines have problems of insufficient accuracy and difficulty in locating and dynamic cutting, especially when dealing with irregular workpiece surfaces, it is difficult to achieve high-precision and efficient cutting.
A positioning device including a clamping hoop, a pressure sensor, a roller and a camera is designed. Through the cooperation of the pressure sensor and the roller, the precise positioning and dynamic adjustment of the nozzle are achieved. The camera is used to collect and cut situations in real time.
It improves the positioning accuracy and dynamic cutting control capability of plasma cutting machines, reduces the error of manual adjustment, is suitable for workpieces of various types and shapes, and improves cutting quality and efficiency.
Smart Images
Figure CN222790855U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of positioning of a plasma cutting machine, in particular to a positioning device for a plasma cutting machine. Background Art
[0002] Plasma cutting equipment is widely used in the field of industrial thermal processing due to its excellent processing effect, efficient operation speed, wide cutting capacity and low cost. The cutting principle of plasma cutting machine is to decompose or ionize the mixed gas into a high-temperature and high-speed plasma arc, and process the plasma arc through the nozzle to form a compressed high-temperature plasma flow, so that the plasma flow is blown to the incision of the workpiece with the help of high-pressure gas, and then the part of the workpiece incision is melted or evaporated, and at the same time, the melted or evaporated part of the workpiece incision is blown away with high-pressure gas, so that a narrow incision is quickly formed at the incision of the workpiece. Since plasma cutting does not rely on oxidation reaction, but relies on melting to cut the workpiece, plasma cutting has a wide range of applications and can cut almost all types of metals, non-metals, multi-layers and composite materials. In addition, plasma cutting has the characteristics of narrow incision, good cutting surface quality, fast cutting speed, and no deformation when using plasma to cut thin plates, which makes plasma cutting machines suitable for cutting, opening holes, digging and beveling of thin plates. Therefore, plasma cutting is widely used in automobiles, pressure vessels, chemical machinery, nuclear industry, general machinery, engineering machinery, steel structures and other fields.
[0003] Before starting to use a plasma cutting machine to cut a workpiece, the plasma cutting machine must first accurately position the incision of the workpiece, which means that the nozzle of the plasma cutting machine needs to be accurately aligned with the top of the incision of the workpiece so that the cutting operation can be performed. This positioning process will directly affect the accuracy and precision of the subsequent cutting operation. The vertical distance positioning between the nozzle and the incision of the workpiece is an important part of the positioning process. If the vertical distance positioning between the nozzle and the incision of the workpiece is too large or too small, it may cause the incision of the workpiece to be incompletely cut or the incision is too large, thereby affecting the cutting quality. At present, the positioning of the incision of the workpiece is mainly based on manual experience to achieve this goal. However, this adjustment method produces a large error, which easily affects the quality and accuracy of subsequent processing procedures. In addition, if the surface of the workpiece presents an irregular structure such as an arc, in order to ensure that the plasma cutting machine can effectively cut the workpiece, it is necessary to dynamically adjust the height of the nozzle according to the change of the vertical distance between the nozzle and the metal plate processing surface during the cutting operation. However, the manually adjusted nozzle height is time-consuming and laborious, and the adjustment method has a large error, which is difficult to meet the needs of dynamic cutting control. Therefore, the plasma cutting machine is optimized and improved in terms of positioning and dynamic cutting in order to improve the accuracy of cutting positioning and the effect of cutting workpieces. Summary of the invention
[0004] In view of the deficiencies in the prior art, the utility model provides a positioning device for a plasma cutting machine which can accurately position a cutting gun body and facilitate dynamic cutting management, so as to overcome the defects in the prior art.
[0005] The technical solution adopted by the utility model is: a positioning device for a plasma cutting machine, comprising a clamp, a fixing plate is horizontally arranged on the clamp, a fixing groove is opened on the fixing plate, a first screw is sleeved in the fixing groove, a pressure sensor is arranged at the bottom end of the first screw, a first nut is sleeved on the top thread of the first screw, the pressure sensor is clamped on the fixing plate by the first nut, a fixing rod is arranged below the pressure sensor, a spring is arranged between the fixing rod and the pressure sensor, two ends of the spring are respectively mounted on the pressure-sensing end of the pressure sensor and the top of the fixing rod, a fixing tube is sleeved on the spring, the pressure-sensing end of the pressure sensor, the spring and the top of the fixing rod are all movably sleeved in the fixing tube, the top of the fixing tube is mounted on the pressure sensor, and a roller is arranged at the bottom end of the fixing rod.
[0006] Preferably, a fixing ring is provided at the top of the clamp, and the bottom end of the fixing ring is installed on the clamp, and a circular groove and a cross groove are respectively provided on the top of the fixing ring, the circular groove is located in the middle of the cross groove, the cross groove is connected with the circular groove, a supporting ring is sleeved in the circular groove, the end of the fixing plate away from the first screw is installed on the supporting ring, the fixing plate is sleeved in the cross groove, a limiting ring is movably sleeved in the supporting ring, the limiting ring and the fixing ring are an integral structure, the limiting ring passes through the part of the support ring that is threadedly sleeved with a fixing cover with an opening facing downwards, the support ring is pressed and fixed in the circular groove through the fixing cover, a fixing hole is provided on the fixing cover, and the center line of the fixing hole, the center line of the support ring, the center line of the limiting ring, the center line of the circular groove, the center line of the fixing ring and the center line of the clamp are all located on the same axis.
[0007] Preferably, a support plate is provided on the side of the support ring away from the fixed plate, the support plate and the support ring are an integral structure, the support plate is sleeved in the cross groove, and a camera is provided on the side of the support plate away from the support ring, the camera is located below the support plate, and the camera's collection direction is towards the direction away from the support plate.
[0008] Preferably, a support groove is provided on the support plate, and the support groove is provided on the support plate along a direction from close to the clamp to away from the clamp, a second screw is installed in the support groove, the camera is arranged on the bottom end of the second screw, the top thread of the second screw is installed with a second nut, and the camera is clamped on the support plate by the second nut.
[0009] Preferably, a bracket is arranged between the second screw and the camera, and the bracket adopts an L-shaped plate structure. The horizontal plate of the bracket is installed on the bottom end of the second screw, and the width of the horizontal plate of the bracket is not less than the width of the support groove. An adjustment groove is provided on the vertical plate of the bracket, and the adjustment groove is provided on the vertical plate of the bracket along the vertical direction. A third screw is installed in the adjustment groove, and a rack is provided at the end of the third screw close to the camera. The rack is respectively installed on the camera and the third screw, and a third nut is threadedly installed on the side of the third screw away from the rack, and the rack is clamped on the vertical plate of the bracket by the third nut.
[0010] Preferably, the fixing groove is opened on the fixing plate along the direction from close to the clamp to away from the clamp, and scale layers are opened on both sides of the fixing plate respectively. The scale layers are opened on the side walls of the fixing plate, and the scale layers extend along the direction from close to the clamp to away from the clamp. An arrow groove is opened on the side wall of the pressure sensor, and the arrow of the arrow groove points to the scale layer.
[0011] Preferably, the roller includes a fixed shell with an opening at the top and a ball movably mounted in the fixed shell, an arc groove is provided at the bottom of the fixed rod, the middle and upper part of the ball of the roller is movably mounted in the arc groove, the inner cavity structure of the arc groove and the middle and upper structure of the ball of the roller are consistent, the fixed shell of the roller is threadedly mounted on the fixed rod, a through hole is provided at the bottom of the fixed shell of the roller, the bottom of the ball of the roller passes through the through hole, and the ball of the roller is in contact with the fixed shell of the roller.
[0012] The beneficial effects of the utility model are as follows: first, the utility model clamps the utility model on the cutting gun body of the plasma cutting machine through the clamp, so that the cutting gun body moves with the utility model. By controlling the cutting gun body to move toward the workpiece, the carrying roller is pressed on the surface of the workpiece to be cut, and the pressure on the roller is transmitted by the fixing rod and the spring, so that the pressure sensor is squeezed, thereby changing the pressure parameter of the pressure sensor. When the pressure parameter of the pressure sensor reaches the predetermined cutting value, the movement of the cutting gun body is stopped, and the precise positioning of the cutting gun body is completed. Moreover, as the cutting gun body moves toward the direction close to the roller, the roller is driven to roll along the surface of the workpiece. If the surface of the workpiece presents an irregular structure such as an arc surface, the pressure parameter of the pressure sensor changes as the roller rises or falls. According to the change information of the pressure parameter of the pressure sensor, the cutting gun body is adjusted to rise or fall, so as to facilitate the realization of the requirements of dynamic cutting control. In addition, the utility model can adjust the installation position of the pressure sensor on the fixed plate by opening a fixing groove on the fixed plate, and setting a first screw and a first nut, thereby facilitating the adjustment of the distance between the pressure sensor and the clamp, so as to facilitate the adjustment of the distance between the pressure sensor and the clamp according to the movement efficiency of the cutting gun body.
[0013] Secondly, the utility model can press and fix the fixing plate and the support ring on the fixing ring by setting a fixing cover. By unscrewing the fixing cover, the position of the fixing plate placed in the cross groove can be changed, and the installation position of the fixing plate on the fixing ring can be adjusted; therefore, if the moving direction of the cutting gun body of the plasma cutting machine is changed, by adjusting the installation position of the fixing plate on the fixing ring, the roller and the pressure sensor are located in the moving direction of the cutting gun body, so as to meet the needs of positioning in multiple cutting directions and dynamic cutting control.
[0014] Thirdly, the utility model installs the camera on the support ring by means of a support plate, so as to facilitate the use of the camera to collect the cutting conditions at the incision of the workpiece. The support plate is provided with a support groove, and the second screw and the second nut are provided, so that the installation position of the camera on the support plate can be adjusted, that is, the distance between the camera and the clamp can be conveniently adjusted; similarly, the vertical plate of the bracket is provided with an adjustment groove, and the third screw and the third nut are provided, so that the vertical position of the camera on the bracket can be adjusted, so as to facilitate the use of the camera to collect the cutting conditions at the incision of the workpiece.
[0015] In addition, the utility model provides a scale layer on the fixed plate and an arrow groove on the side wall of the pressure sensor, and can conveniently judge the horizontal distance between the pressure sensor and the roller and the cutting gun body of the plasma cutting machine in the clamp by observing the position of the arrow groove on the scale layer, so as to adjust the position of the pressure sensor. Moreover, the utility model can limit the ball of the roller through the fixed shell of the roller, so that the ball of the roller is set between the fixed shell of the roller and the fixed rod, so as to facilitate the rolling of the ball of the roller in multiple directions, so that the roller and the surface of the workpiece are stably in contact. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a three-dimensional schematic diagram of the utility model.
[0017] Figure 2 This is an assembly cross-sectional view of the roller, fixing rod, spring and fixing tube of the utility model.
[0018] Figure 3 It is an exploded view of the assembly between the clamp, the fixing ring, the support ring and the fixing cover in the utility model.
[0019] Figure 4 This is an exploded view of the assembly between the roller, the fixing rod, the camera and the support ring in the utility model.
[0020] Figure 5 It is a schematic diagram of the assembly between the utility model and the cutting gun body of a plasma cutting machine. DETAILED DESCRIPTION
[0021] like Figures 1 to 5 As shown, a positioning device for a plasma cutting machine comprises a clamp 1, a fixing plate 2 is horizontally arranged on the clamp 1, a fixing groove 3 is opened on the fixing plate 2, a first screw 4 is sleeved in the fixing groove 3, a pressure sensor 5 is arranged at the bottom end of the first screw 4, the pressure sensor 5 is located below the fixing groove 3, a first nut 6 is sleeved on the top thread of the first screw 4, the pressure sensor 5 is clamped on the fixing plate 2 by the first nut 6, so as to adjust the installation position of the pressure sensor 5 on the fixing plate 2, a fixing rod 7 is arranged below the pressure sensor 5, a spring 8 is arranged between the fixing rod 7 and the pressure sensor 5, two ends of the spring 8 are respectively installed on the pressure-sensing end of the pressure sensor 5 and the top of the fixing rod 7, a fixing tube 9 is sleeved on the spring 8, the pressure-sensing end of the pressure sensor 5, the spring 8 and the top of the fixing rod 7 are all movably sleeved in the fixing tube 9, the top of the fixing tube 9 is installed on the pressure sensor 5, and a roller 10 is arranged at the bottom end of the fixing rod 7. By clamping the clamp 1 on the cutting gun body of the plasma cutting machine, the utility model is fixed to the cutting gun body, so when the cutting gun body of the plasma cutting machine moves up and down, the utility model can be driven to move together. By controlling the movement of the cutting gun body, the roller 10 is located above the incision of the workpiece to be cut, and then the cutting gun body is controlled to move toward the incision of the workpiece to be cut. After the roller 10 contacts the surface of the workpiece to be cut, the roller 10 and the fixed rod 7 are squeezed, so that the fixed rod 7 moves upward relative to the fixed tube 9, driving the spring 8 to squeeze the pressure-sensitive end of the pressure sensor 5, thereby changing the pressure-sensitive parameter of the pressure sensor 5. When the pressure-sensitive parameter of the pressure sensor 5 reaches the predetermined cutting value, the downward movement of the cutting gun body is stopped to accurately complete the positioning operation of the cutting gun body. As the cutting gun body moves toward the direction close to the roller 10, if the surface of the workpiece presents an irregular structure such as an arc surface, the pressure-sensitive parameter of the pressure sensor 5 changes with the rise or fall of the roller 10. According to the change information of the pressure-sensitive parameter of the pressure sensor 5, the cutting gun body is adjusted to rise or fall, thereby realizing the requirements of dynamic cutting control.
[0022] Please refer again Figure 3The top of the hoop 1 is provided with a fixing ring 11, the bottom end of the fixing ring 11 is installed on the hoop 1, the top of the fixing ring 11 is respectively provided with a circular groove 12 and a cross groove 13, the circular groove 12 is located in the middle of the cross groove 13, the cross groove 13 is connected to the circular groove 12, a supporting ring 14 is sleeved in the circular groove 12, the end of the fixing plate 2 away from the first screw 4 is installed on the supporting ring 14, the fixing plate 2 is sleeved in the cross groove 13, and a limiting ring is movably sleeved in the supporting ring 14, the limiting ring and the fixing ring 11 are an integral structure, the limiting ring The part of the position ring that passes through the support ring 14 is threadedly sleeved with a fixing cover 15 with an opening facing downwards, and the support ring 14 is pressed and fixed in the circular groove 12 through the fixing cover 15. The fixing cover 15 is provided with a fixing hole 16. The center line of the fixing hole 16, the center line of the support ring 14, the center line of the limiting ring, the center line of the circular groove 12, the center line of the fixing ring 11 and the center line of the clamp 1 are all located on the same axis, so that it is convenient to put the fixing cover 15, the support ring 14, the limiting ring, the fixing ring 11 and the clamp 1 into the cutting gun body of the plasma cutting machine. The groove width of the cross groove 13 is consistent with the width of the fixing plate 2, and the groove diameter of the circular groove 12 is consistent with the outer wall diameter of the support ring 14, so that the cross groove 13 is used to limit the fixing plate 2, and the circular groove 12 is used to limit the support ring 14, and then the support ring 14 is pressed and fixed into the fixing ring 11 with the help of the fixing cover 15 to meet the fixing needs of the fixing plate 2 and the support ring 14. By unscrewing the fixing cover 15, the position of the fixing plate 2 in the cross groove 13 can be changed, thereby adjusting the installation position of the fixing plate 2 on the fixing ring 11; for this reason, if the moving direction of the cutting gun body of the plasma cutting machine changes, by adjusting the installation position of the fixing plate 2 on the fixing ring 11, the roller 10 and the pressure sensor 5 are located in the moving direction of the cutting gun body to meet the needs of positioning in multiple cutting directions and dynamic cutting control.
[0023] In this embodiment, a support plate 17 is provided on the side of the support ring 14 away from the fixed plate 2. The support plate 17 and the support ring 14 are an integral structure. The support plate 17 is inserted into the cross groove 13. A camera 18 is provided on the side of the support plate 17 away from the support ring 14. The camera 18 is located below the support plate 17. The collecting direction of the camera 18 is toward the direction away from the support plate 17, so that the collecting direction of the camera 18 is toward the incision of the workpiece, thereby facilitating the collection of the cutting condition of the workpiece.
[0024] Specifically, a support groove 19 is provided on the support plate 17, and the support groove 19 is provided on the support plate 17 along a direction from close to the clamp 1 to away from the clamp 1. A second screw 20 is installed in the support groove 19, and the camera 18 is arranged on the bottom end of the second screw 20. A second nut 21 is installed on the top thread of the second screw 20. The camera 18 is clamped on the support plate 17 by the second nut 21 to adjust the installation position of the camera 18 on the support plate 17.
[0025] Please refer again Figure 1 and 4 A bracket 22 is arranged between the second screw rod 20 and the camera 18. The bracket 22 adopts an L-shaped plate structure. The horizontal plate of the bracket 22 is installed on the bottom end of the second screw rod 20. The width of the horizontal plate of the bracket 22 is not less than the width of the support groove 19. An adjustment groove 23 is provided on the vertical plate of the bracket 22. The adjustment groove 23 is arranged on the vertical plate of the bracket 22 along the vertical direction. A third screw rod 24 is installed in the adjustment groove 23. A frame 25 is provided at one end of the third screw rod 24 close to the camera 18. The frame 25 is respectively installed on the camera 18 and the third screw rod 24. A third nut 26 is threadedly installed on the side of the third screw rod 24 away from the frame 25. The frame 25 is clamped on the vertical plate of the bracket 22 by the third nut 26 to facilitate the adjustment of the vertical installation position of the camera 18.
[0026] In this embodiment, the fixing groove 3 is opened on the fixing plate 2 along the direction from close to the clamp 1 to away from the clamp 1, and scale layers 27 are opened on both sides of the fixing plate 2 respectively. The scale layer 27 is opened on the side wall of the fixing plate 2, and the scale layer 27 extends along the direction from close to the clamp 1 to away from the clamp 1. An arrow groove 28 is opened on the side wall of the pressure sensor 5, and the arrow of the arrow groove 28 points to the scale layer 27. By observing the position of the arrow groove 28 in the scale layer 27, it is convenient to grasp the horizontal distance between the pressure sensor 5 and the clamp 1, so as to facilitate the judgment of the horizontal distance between the pressure sensor 5 and the roller 10 and the cutting gun body of the plasma cutting machine installed in the clamp 1, and then adjust the reaction interval of the cutting gun body of the cutting machine moving up and down.
[0027] Please refer to 1, 2 and 4 again. The roller 10 includes a fixed shell with an opening at the top and a ball movably mounted in the fixed shell. An arc groove 29 is provided at the bottom of the fixed rod 7. The middle and upper parts of the ball of the roller 10 are movably mounted in the arc groove 29. The inner cavity structure of the arc groove 29 is consistent with the middle and upper structure of the ball of the roller 10. The fixed shell of the roller 10 is threadedly mounted on the fixed rod 7. A through hole is provided at the bottom of the fixed shell of the roller 10. The bottom of the ball of the roller 10 passes through the through hole. The ball of the roller 10 contacts the fixed shell of the roller 10, so that the ball of the roller 10 is rolled and arranged between the fixed shell of the roller 10 and the fixed rod 7, so that the roller 10 can roll in multiple directions. By twisting the fixed shell of the roller 10, the fixed shell of the roller 10 can be removed from the support rod, thereby facilitating the removal of the ball of the roller 10 and facilitating the maintenance of the roller 10.
[0028] The assembly method of this product is as follows: Figures 1 to 5As shown, first, the fixing cover 15, the support ring 14, the fixing ring 11 and the clamp 1 are sequentially mounted on the cutting gun body of the plasma cutting machine, the cross slot 13 is adjusted to be parallel to the moving direction of the cutting gun body, and the fixing height of the clamp 1 is adjusted so that the roller 10 can contact the surface of the workpiece, thereby clamping the clamp 1 on the cutting gun body. Next, the ball of the roller 10 is placed in the arc groove 29, the fixing shell of the roller 10 is screwed onto the fixing rod 7, and then the first screw 4 is inserted into the fixing groove 3, and the first nut 6 is used to screw onto the first screw 4, so that the pressure sensor 5 is clamped on the fixing plate 2. Then, the bracket 22 is clamped to the support plate 17 using the second screw 20 and the second nut 21 in the above manner, and the frame 25 with the camera 18 installed is clamped to the bracket 22 using the third screw 24 and the third nut 26. Finally, the power-on ends of the camera 18 and the pressure sensor 5 are connected to the numerical control terminal of the plasma cutting machine respectively by using wires, so as to facilitate the completion of precise positioning, dynamic cutting management and cutting collection operations.
[0029] Through the embodiment, the product is clamped on the cutting gun body of the plasma cutting machine by the clamp 1, so that the cutting gun body moves with the product. By controlling the cutting gun body to move toward the workpiece, the roller 10 is pressed on the surface of the workpiece to be cut, and the pressure on the roller 10 is transmitted by the fixing rod 7 and the spring 8, so that the pressure sensor 5 is squeezed, thereby changing the pressure parameter of the pressure sensor 5. When the pressure parameter of the pressure sensor 5 reaches the predetermined cutting value, the movement of the cutting gun body is stopped, and the precise positioning of the cutting gun body is completed. Moreover, as the cutting gun body moves toward the direction close to the roller 10, the roller 10 is driven to roll along the surface of the workpiece. If the surface of the workpiece presents an irregular structure such as an arc surface, the pressure parameter of the pressure sensor 5 changes with the rise or fall of the roller 10. According to the change information of the pressure parameter of the pressure sensor 5, the cutting gun body is adjusted to rise or fall, so as to facilitate the realization of the requirements of dynamic cutting control. In addition, the utility model can adjust the installation position of the pressure sensor 5 on the fixing plate 2 by opening a fixing groove 3 on the fixing plate 2, and setting a first screw 4 and a first nut 6, so as to facilitate the adjustment of the distance between the pressure sensor 5 and the clamp 1, so as to facilitate the adjustment of the distance between the pressure sensor 5 and the clamp 1 according to the moving efficiency of the cutting gun body.
[0030] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.
Claims
1. A positioning device for a plasma cutting machine, comprising a clamp (1), characterized in that: A fixing plate (2) is horizontally arranged on the clamp (1), a fixing groove (3) is provided on the fixing plate (2), a first screw rod (4) is sleeved in the fixing groove (3), a pressure sensor (5) is arranged at the bottom end of the first screw rod (4), a first nut (6) is sleeved on the top thread of the first screw rod (4), the pressure sensor (5) is clamped on the fixing plate (2) by the first nut (6), a fixing rod (7) is arranged below the pressure sensor (5), a spring (8) is arranged between the fixing rod (7) and the pressure sensor (5), two ends of the spring (8) are respectively mounted on the pressure sensing end of the pressure sensor (5) and the top of the fixing rod (7), a fixing tube (9) is sleeved on the spring (8), the pressure sensing end of the pressure sensor (5), the spring (8) and the top of the fixing rod (7) are all movably sleeved in the fixing tube (9), the top of the fixing tube (9) is mounted on the pressure sensor (5), and a roller (10) is arranged at the bottom end of the fixing rod (7).
2. The positioning device for a plasma cutting machine according to claim 1, characterized in that: The top of the clamp (1) is provided with a fixing ring (11), the bottom of the fixing ring (11) is mounted on the clamp (1), the top of the fixing ring (11) is provided with a circular groove (12) and a cross groove (13), the circular groove (12) is located in the middle of the cross groove (13), the cross groove (13) is connected to the circular groove (12), a support ring (14) is sleeved in the circular groove (12), an end of the fixing plate (2) away from the first screw rod (4) is mounted on the support ring (14), the fixing plate (2) is sleeved in the cross groove (13), and the support ring (14) The inner movable sleeve has a limit ring, the limit ring and the fixed ring (11) are an integral structure, the threaded sleeve of the limit ring that passes through the support ring (14) is provided with a fixed cover (15) with an opening facing downwards, the support ring (14) is pressed into the circular groove (12) by the fixed cover (15), the fixed cover (15) is provided with a fixing hole (16), the center line of the fixing hole (16), the center line of the support ring (14), the center line of the limit ring, the center line of the circular groove (12), the center line of the fixed ring (11) and the center line of the clamp (1) are all located on the same axis.
3. The positioning device for a plasma cutting machine according to claim 2, characterized in that: A support plate (17) is provided on the side of the support ring (14) away from the fixed plate (2); the support plate (17) and the support ring (14) are an integral structure; the support plate (17) is sleeved in the cross groove (13); a camera (18) is provided on the side of the support plate (17) away from the support ring (14); the camera (18) is located below the support plate (17); and the collection direction of the camera (18) is towards a direction away from the support plate (17).
4. The positioning device for a plasma cutting machine according to claim 3, characterized in that: The support plate (17) is provided with a support groove (19), the support groove (19) being provided on the support plate (17) along a direction from close to the clamp (1) to far away from the clamp (1), a second screw rod (20) being sleeved in the support groove (19), the camera (18) being arranged on the bottom end of the second screw rod (20), a second nut (21) being sleeved on the top thread of the second screw rod (20), and the camera (18) being clamped on the support plate (17) by the second nut (21).
5. The positioning device for a plasma cutting machine according to claim 4, characterized in that: A bracket (22) is arranged between the second screw rod (20) and the camera (18). The bracket (22) adopts an L-shaped plate structure. The horizontal plate of the bracket (22) is mounted on the bottom end of the second screw rod (20). The width of the horizontal plate of the bracket (22) is not less than the width of the support groove (19). An adjustment groove (23) is provided on the vertical plate of the bracket (22). The adjustment groove (23) is arranged on the vertical plate of the bracket (22) along the vertical direction. A third screw rod (24) is sleeved in the adjustment groove (23). A frame (25) is arranged at one end of the third screw rod (24) close to the camera (18). The frame (25) is respectively mounted on the camera (18) and the third screw rod (24). A third nut (26) is threadedly sleeved on one side of the third screw rod (24) away from the frame (25). The frame (25) is clamped on the vertical plate of the bracket (22) by the third nut (26).
6. The positioning device for a plasma cutting machine according to claim 1, characterized in that: The fixing groove (3) is formed on the fixing plate (2) along a direction from close to the clamp (1) to far away from the clamp (1), and scale layers (27) are formed on both sides of the fixing plate (2). The scale layers (27) are formed on the side walls of the fixing plate (2), and the scale layers (27) extend along a direction from close to the clamp (1) to far away from the clamp (1). An arrow groove (28) is formed on the side wall of the pressure sensor (5), and an arrow of the arrow groove (28) points toward the scale layer (27).
7. The positioning device for a plasma cutting machine according to claim 1, characterized in that: The roller (10) comprises a fixed shell with an opening at the top and a ball movably mounted in the fixed shell. A circular arc groove (29) is provided at the bottom of the fixed rod (7). The middle and upper parts of the ball of the roller (10) are movably mounted in the circular arc groove (29). The inner cavity structure of the circular arc groove (29) matches the middle and upper structure of the ball of the roller (10). The fixed shell of the roller (10) is threadedly mounted on the fixed rod (7). A through hole is provided at the bottom of the fixed shell of the roller (10). The bottom of the ball of the roller (10) passes through the through hole. The ball of the roller (10) contacts the fixed shell of the roller (10).