A modular positioning and machining apparatus for wheelchair accessories

Abstract

The present application relates to pipe cutting positioning technical field, specifically, it is a kind of combined positioning machining equipment for wheelchair accessories.It includes the first sliding seat, second sliding seat and third sliding seat slidingly connected on the top of base, the top of first sliding seat, second sliding seat and third sliding seat is respectively equipped with driving assembly, auxiliary positioning assembly and cutting assembly;The driving assembly includes a revolving part and multiple rotating parts;Through the auxiliary gas spouted by laser head, before reaching the tangent point with pipe, first pass from the vicinity of laser beam focal point, make the molten slag of laser beam focal point rapid cooling solidification.The blowing force of auxiliary gas, hinder molten slag to follow the synchronous rotation of thin-walled metal pipe, prevent molten slag to backfill into cutting seam and make two pipe pieces to stick together again.And, by setting the direction of auxiliary gas spouted by laser head and the axis of pipe perpendicular, prevent auxiliary gas to blow molten slag in molten state to flow along the axis of pipe.

Description

Technical Field

[0001] This invention relates to the field of pipe cutting and positioning technology, and more specifically, to a combined positioning and processing equipment for wheelchair accessories. Background Technology

[0002] When processing wheelchair components, such as thin-walled aluminum alloy / carbon steel tubes (wall thickness 1.2-2.5mm), these tubes are prone to deformation due to their poor rigidity and susceptibility to external pressure. Therefore, non-contact laser cutting is typically used. This method utilizes a focused laser beam to irradiate the workpiece, causing the material at the irradiated area to rapidly melt, vaporize, or reach its ignition point. Simultaneously, an auxiliary airflow is used to blow away the molten or vaporized material, thus completing the cutting process.

[0003] The main steps for fixing the pipes refer to a pipe cutting machine tool disclosed in invention patent CN118218668A: First, multiple pipes are installed into the pipe placement groove, and then the drive structure drives each pipe to rotate. Through the above-mentioned "revolution + rotation" method, the pipes pass through the cutting points in sequence. The cutting process, as described in a laser cutting machine with adaptive fixing disclosed in CN120269185A, involves the laser head cutting the protruding steel pipe with a focused laser beam.

[0004] However, after the laser beam melts the tubing at the focal point to produce slag, and before the tubing is completely cut, the slag tends to rotate along with the uncut portion of the tubing, which can easily cause the following problems:

[0005] 1. When the pipe rotates at high speed, there is friction between the pipe wall and the molten slag in the uncut area. The rotation of the pipe wall will cause the molten slag attached to its surface to move synchronously through friction, forming a pulling force. At this time, the cut is not completely connected, and the pulling force of the rotation will directly "drag" the viscous molten slag back into the cut. After the molten slag cools, it will re-bond the two sections of pipe together.

[0006] 2. When the force applied by the auxiliary airflow to the molten slag has a component force along the axial direction of the pipe (in order to prevent the molten slag from backfilling into the cutting seam), the airflow will push the slag to flow along the outer surface of the pipe, so that slag is adhered to many places on the outer surface of the pipe, which increases the amount of grinding work for subsequent wheelchair parts processing.

[0007] In view of this, we propose a combined positioning and processing equipment for wheelchair parts to improve the above-mentioned shortcomings. Summary of the Invention

[0008] This invention provides a combined positioning and processing device for wheelchair accessories, which solves the problem of molten slag backfilling into the cutting seam and flowing along the outer surface of the pipe.

[0009] To achieve the above objectives, the combined positioning and processing equipment for wheelchair accessories includes a first sliding seat, a second sliding seat, and a third sliding seat slidably connected to the top of the base. The top of the first sliding seat, the second sliding seat, and the third sliding seat are respectively equipped with a drive assembly, an auxiliary positioning assembly, and a cutting assembly.

[0010] The driving assembly includes a revolving component and multiple rotating components. The revolving component drives multiple thin-walled metal tubes to rotate around a common axis, while the rotating components drive the thin-walled metal tubes to rotate around their own axes from their ends. All the thin-walled metal tubes pass through the auxiliary positioning assembly so that each thin-walled metal tube is fixed at least two points in its own axial direction.

[0011] The cutting assembly includes a third mounting base fixedly connected to the top of the third sliding seat. A protective positioning component is fixedly sleeved inside the third mounting base. A positioning hole is opened on the outer side wall of the protective positioning component. An air jet head and a laser head are provided outside the positioning hole. The air jet head is fixedly connected to the third mounting base, and the laser head is fixedly connected to the third sliding seat. The laser head sprays a laser beam in a horizontal direction to melt the thin-walled metal tube passing through the focal point. The air jet direction of the air jet head is perpendicular to the axis of the thin-walled metal tube.

[0012] When the thin-walled metal tube rotates to the positioning hole, and the center of rotation of the thin-walled metal tube and the center of revolution of the thin-walled metal tube are in the same horizontal plane, the focal point of the laser head on the thin-walled metal tube is point M, and the tangent point between the path of the gas blown out by the jet head and the outer wall of the thin-walled metal tube is point N. Along the direction of rotation of the thin-walled metal tube, point N is located upstream of point M, which is used to prevent the slag generated at point M from rotating with the thin-walled metal tube.

[0013] Based on this, the revolution component includes a pair of first mounting seats fixedly connected to the first sliding seat. The two first mounting seats are symmetrically arranged, and the inner rings of the two first mounting seats are slidably connected to rotating arms. The rotating arms have multiple mounting cavities inside, and the multiple mounting cavities are distributed in a ring array around the axis of the rotating arms.

[0014] Based on the above, a driving method for the rotating arm to revolve within two first mounting seats is disclosed. The outer wall of the rotating arm is fixedly connected to an annular rack, and the top of the first mounting seat is rotatably connected to a gear, which meshes with the annular rack.

[0015] The self-rotating component includes a bearing housing and a connector disposed in the mounting cavity. The bearing housing has a fixed part and a movable part. The fixed part is fixedly connected to the inner wall of the mounting cavity, and the movable part is coaxially connected to the connector.

[0016] By employing a composite motion of "revolution + rotation" for thin-walled metal tubing, the high precision requirements of "deformation prevention and high surface quality" in wheelchair parts processing are met, as well as the efficiency of mass production.

[0017] In another technical solution, the rotating arm rotates in the opposite direction to the connector, and the cut in the pipe fitting is located downstream of the uncut position along the direction of the connector's rotation. Because the rotating arm driving the pipe fitting's revolution and rotation rotates in the opposite directions to the connector, the centrifugal force of the pipe fitting's high-speed rotation is opposite to the direction of its revolution's inertia. The combined force of these two forces causes molten slag to splash away from the laser head, preventing high-temperature molten slag from splashing onto the laser head and causing damage.

[0018] The auxiliary positioning component includes a second mounting base fixedly connected to the second sliding seat. A revolution arm is rotatably connected inside the second mounting base. Multiple rotation cavities are rotatably connected to the revolution arm. Each rotation cavity is rotatably connected to the revolution arm and is used to fix the pipe passing through the rotation cavity at at least two points.

[0019] Furthermore, the central angle corresponding to the positioning hole is an acute angle. When the thin-walled metal tube rotates until its own axis is on the same horizontal plane as the focal point of the laser head, point M is tangent to the thin-walled metal tube.

[0020] The blowing direction of the jet head is perpendicular to the axis of the thin-walled metal tube, and the angle between the blowing direction of the jet head and the direction of the laser beam emitted by the laser head is an acute angle. Along the direction parallel to the tube, the height of point N is lower than the height of point M.

[0021] This technical solution prevents the auxiliary gas ejected from the laser head from flowing along the axial direction of the pipe by setting the direction of the auxiliary gas perpendicular to the axis of the pipe. This prevents the auxiliary gas from blowing the molten slag along the axial direction of the pipe, which would otherwise cause the molten slag to form multiple uneven spots on the surface of the pipe after cooling.

[0022] Based on the above description, the beneficial effects of the present invention compared with the prior art are as follows:

[0023] Assist gas is ejected from the laser head, passing near the laser beam's focal point before reaching the tangential point with the pipe. This causes the molten slag generated at the focal point to cool and solidify rapidly. Simultaneously, the force of the assist gas prevents the molten slag from rotating synchronously with the thin-walled metal pipe, thus preventing it from backfilling into the cut and causing the two sections of the pipe to re-bond. Furthermore, by setting the direction of the assist gas ejected from the laser head perpendicular to the pipe's axis, it prevents the assist gas from blowing the molten slag axially along the pipe, which would otherwise create unevenness on the pipe's surface after cooling, thus avoiding increased grinding work. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0025] Figure 1This is a perspective view of the overall structure of the present invention;

[0026] Figure 2 This is a partial cross-sectional left view of the present invention;

[0027] Figure 3 This is a three-dimensional structural diagram of the orbiting component of the present invention;

[0028] Figure 4 This is a three-dimensional structural diagram of the self-rotating component of the present invention;

[0029] Figure 5 This is a side view schematic diagram of the revolution component and the rotation component of the present invention;

[0030] Figure 6 This is a three-dimensional structural view of the cutting assembly of the present invention;

[0031] Figure 7 This is a side view schematic diagram illustrating the principle of air blowing along the axial direction of the pipe by the jet head in this invention;

[0032] Figure 8 This is a side view schematic diagram of the protective positioning component of the present invention;

[0033] Figure 9 For the present invention Figure 8 Enlarged view of point A in the middle.

[0034] The meanings of the labels in the diagram are as follows:

[0035] 100. Base; 101. First sliding seat; 102. Second sliding seat; 103. Third sliding seat;

[0036] 200, Drive assembly; 210, First mounting base; 211, Rotating arm; 212, Ring rack; 213, Gear; 214, Mounting cavity; 220, Bearing housing; 221, Plug-in socket;

[0037] 300. Auxiliary positioning component; 310. Second mounting base; 320. Revolution arm; 330. Rotation cavity;

[0038] 400. Cutting assembly; 410. Third mounting base; 420. Protective positioning component; 421. Outer interlayer; 422. Inner interlayer; 423. Cutting cavity; 430. Air jet head; 440. Laser head; 450. Positioning hole; 460. Feed chute. Detailed Implementation

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] After the laser beam melts the tubing at its focal point, producing slag, but before the tubing is completely cut, the pulling force of the tubing's rotation directly "drags" the viscous slag back into the cut. Once the slag cools, the parts that should have been cut off re-adhere together. To prevent slag from backfilling the cut, an air jet device is usually placed near the laser beam's focal point to blow the slag away from the cutting point using auxiliary airflow. However, if the auxiliary airflow has a component along the tubing's axial direction, the airflow will push the slag along the outer surface of the tubing, resulting in slag adhering to multiple areas on the outer surface, increasing the amount of grinding work required for subsequent wheelchair component processing.

[0041] To address the aforementioned problems in the prior art, the present invention aims to provide a combined positioning and processing device for wheelchair components. (See attached document.) Figure 1 and Figure 2 As shown, the processing equipment includes a first sliding seat 101, a second sliding seat 102 and a third sliding seat 103 slidably connected to the top of the base 100. The top of the first sliding seat 101, the second sliding seat 102 and the third sliding seat 103 are respectively equipped with a drive assembly 200, an auxiliary positioning assembly 300 and a cutting assembly 400.

[0042] The drive assembly 200 includes a revolving component and multiple rotating components. The revolving component is used to drive multiple thin-walled metal tubes to rotate around a common axis, while the rotating components drive the thin-walled metal tubes to rotate around their own axes from the ends. The multiple thin-walled metal tubes all pass through the auxiliary positioning assembly 300 so that each thin-walled metal tube is fixed at least two points in its own axial direction.

[0043] The cutting assembly 400 includes a third mounting base 410 fixedly connected to the top of the third sliding base 103. A protective positioning member 420 is fixedly sleeved inside the third mounting base 410. A positioning hole 450 is opened on the outer side wall of the protective positioning member 420. An air jet head 430 and a laser head 440 are provided on the outer side of the positioning hole 450. The air jet head 430 is fixedly connected to the third mounting base 410, and the laser head 440 is fixedly connected to the third sliding base 103. The laser head 440 sprays a laser beam in a horizontal direction to melt the thin-walled metal tube passing through the focal point. The jet direction of the air jet head 430 is perpendicular to the axis of the thin-walled metal tube.

[0044] When the thin-walled metal tube rotates to the positioning hole 450, and the center of rotation of the thin-walled metal tube and the center of revolution of the thin-walled metal tube are in the same horizontal plane, the focal point of the laser head 440 on the thin-walled metal tube is point M, and the tangent point between the path of the gas blown out by the jet head 430 and the outer wall of the thin-walled metal tube is point N. Along the direction of rotation of the thin-walled metal tube, point N is located upstream of point M, which is used to prevent the slag generated at point M from rotating with the thin-walled metal tube.

[0045] In practice, firstly, one end of each of the multiple thin-walled metal tubes is fixed to a rotating component. Then, the middle portion of each thin-walled metal tube is passed through the auxiliary positioning assembly 300, ensuring that each tube is fixed at least two points axially. Next, the third sliding seat 103 is slid to allow the multiple thin-walled metal tubes to extend into the protective positioning component 420. At this point, the revolving and rotating components are activated, driving the multiple tubes to revolve around a common axis while each tube rotates around its own axis. Then, the laser head 440 sprays a laser beam horizontally, melting the thin-walled metal tube passing through point M. The jet head 430 then sprays auxiliary gas to block the molten slag generated at point M, preventing it from rotating synchronously with the uncut tube and thus preventing the molten slag from backfilling into the cut and causing the two sections of tube to re-adhere.

[0046] Unlike cutting general-purpose tubing, the tubing used for wheelchair parts is usually thin-walled metal tubing. During processing, it is necessary to take into account the high precision requirements of "anti-deformation and high surface quality" while also considering the efficiency of batch processing. Therefore, the thin-walled metal tubing needs to adopt a composite motion of "revolution + rotation".

[0047] Based on the above illustrations, and combined with Figure 3 and Figure 4 As shown, the structural principle of the revolution component and the rotation component is disclosed: The revolution component includes a pair of first mounting seats 210 fixedly connected to the first sliding seat 101. The two first mounting seats 210 are symmetrically arranged. The inner rings of the two first mounting seats 210 are slidably connected to rotating arms 211. Multiple mounting cavities 214 are opened inside the rotating arms 211. The multiple mounting cavities 214 are distributed in a ring array around the axis of the rotating arms 211.

[0048] Based on the above, the driving method of the rotating arm 211 revolving inside the two first mounting seats 210 is disclosed. The outer wall of the rotating arm 211 is fixedly connected to the ring rack 212, and the top of the first mounting seat 210 is rotatably connected to the gear 213, which meshes with the ring rack 212.

[0049] The principle of multiple thin-walled metal tubes revolving around a common axis is disclosed below. When the power to the motor connected to gear 213 is turned on, the motor drives the rotating arm 211 to rotate via gear 213, causing the thin-walled metal tubes in each mounting cavity 214 to revolve. Each array of metal tubes passes sequentially through the laser head 440, and after cutting, slides out of the unloading groove 460, forming a continuous cycle of "loading-cutting-unloading". Compared to the method of cutting a single tube one by one, the revolving method adopted in this application allows multiple thin-walled metal tubes to share the same laser head 440, eliminating the need for an independent laser head 440 for each tube, thereby reducing equipment costs.

[0050] Furthermore, the self-rotating component includes a bearing seat 220 and a connector 221 disposed within the mounting cavity 214. The bearing seat 220 has a fixed part and a movable part. The fixed part is fixedly connected to the inner wall of the mounting cavity 214, and the movable part, the connector 221, is coaxially connected.

[0051] It should be disclosed that the plug-in 221 is coated with a high-friction coefficient coating. After the plug-in 221 is inserted into the thin-walled metal fitting to be cut, the high-friction coefficient coating is used to provide the frictional driving force for the fitting to rotate. In some embodiments, the outer surface of the plug-in 221 may be made of polyurethane elastic coating, which has a high friction coefficient, good elasticity, and adjustable hardness, and can form a flexible fit with the inner wall of the fitting, completely avoiding scratching the inner wall of the thin-walled pipe and compensating for the coaxiality deviation between the plug-in 221 and the inner wall of the fitting.

[0052] Compared with the prior art, the difference in the revolution and rotation of the thin-walled metal pipe used in this application is that the rotation direction of the rotating arm 211 is opposite to that of the plug-in 221. Along the rotation direction of the plug-in 221, the pipe cut is located downstream of the uncut position. Since the rotation directions of the rotating arm 211 and the plug-in 221 that drive the revolution and rotation of the pipe are opposite, the centrifugal force of the high-speed rotation of the pipe is opposite to the inertial direction of its revolution. The combined force of the two will cause the molten slag to splash away from the laser head 440, avoiding damage caused by high-temperature molten slag splashing onto the laser head 440.

[0053] Typically, the metal pipes to be cut are quite long, and are only fixed at the end via the connector 221. During the rotational cutting process, the pipe is prone to skewed cuts due to unstable rotation. Therefore, in Figure 5 In the middle, the auxiliary positioning component 300 includes a second mounting base 310 fixedly connected to the second sliding seat 102. A revolution arm 320 is rotatably connected inside the second mounting base 310. A plurality of rotation cavities 330 are rotatably connected on the revolution arm 320. Each rotation cavity 330 is rotatably connected to the revolution arm 320 and is used to fix the pipe passing through the rotation cavity 330 at least at two points.

[0054] Next, as Figure 6 As shown, the central angle corresponding to the positioning hole 450 is an acute angle. When the thin-walled metal tube rotates until its own axis is on the same horizontal plane as the focal point of the laser head 440, point M is tangent to the thin-walled metal tube.

[0055] The tube will only melt at the focal point when its maximum radius reaches the focal point. Since most tubes are cylindrical, aligning the maximum radius with point M ensures that the laser's highest energy density is fully applied to the tube wall to be cut, rapidly melting or even vaporizing the metal in that area. For thin-walled aluminum alloy and stainless steel tubes commonly used in wheelchair manufacturing, this setup avoids incomplete cutting and the need for secondary processing due to energy dispersion, ensuring a one-time cut while reducing energy waste and improving cutting efficiency.

[0056] As the pipe rotates, its diameter passes through point M sequentially, gradually cutting the thin-walled metal fitting. Therefore, for a certain period of time, the thin-walled metal fitting is in a state of simultaneous cutting and connection. During the pipe's rotation, the pipe wall exerts a frictional driving force on the molten slag, causing the slag to be pulled by the pipe wall and tend to rotate with the fitting. As a result, the molten slag backfills into the cut, and after cooling, it will re-adhere the fitting together.

[0057] Therefore, this application includes a jet nozzle 430 for blowing away molten slag, which blows out auxiliary gas to remove the molten slag from the vicinity of the cut. If the blowing direction of the jet nozzle 430 is arranged parallel to the axis of the thin-walled metal pipe, please refer to [link to relevant documentation] for a clearer understanding of the above. Figure 7 The jet head 430 blows the molten slag generated at point M along the axial direction of the tube. Although it can blow the molten slag away from the vicinity of the cut, it will blow the molten slag to multiple places on the thin-walled metal tube. After it cools, it will cause the surface of the tube to be uneven, which will increase the amount of grinding work for subsequent wheelchair parts processing.

[0058] Based on the above problems, this application improves the position and blowing direction of the jet head 430, such as... Figure 8 and Figure 9 As shown, the blowing direction of the jet head 430 is perpendicular to the axis of the thin-walled metal tube, and the angle between the blowing direction of the jet head 430 and the direction of the laser beam emitted by the laser head 440 is an acute angle. Along the direction parallel to the tube, the height of point N is lower than the height of point M.

[0059] As can be seen from the above, the molten slag generated at point M tends to rotate synchronously with the pipe fitting. Moreover, the gas ejected from the jet nozzle 430 will pass near point M before reaching point N. The driving force of the ejected gas will hinder the synchronous rotation of the molten slag with the pipe fitting, causing the molten slag to fall downwards along the direction of the pipe fitting's revolution, preventing the molten slag from backfilling into the cut along with the pipe fitting's rotation.

[0060] The protective positioning component 420 includes an outer interlayer 421 fixedly connected to the third mounting base 410, an inner interlayer 422 spaced inside the third mounting base 410, and a cutting cavity 423 formed between the outer interlayer 421 and the inner interlayer 422.

[0061] The width of the cutting cavity 423 is adapted to the diameter of the thin-walled metal pipe fitting to prevent molten slag from splashing due to the high-speed rotation of the pipe fitting.

[0062] It should be noted that after the pipe is completely cut, the cut portion slides down the inner wall of the cutting cavity 423 until it slides out of the discharge chute 460. At the same time, the slag generated at point M is blown by the gas ejected from the jet head 430, and the auxiliary gas cools the slag, accelerating its cooling, so that the solidified slag slides down along with the cut thin-walled metal pipe for wheelchair accessories.

[0063] The working principle of the processing equipment will be explained in detail below:

[0064] First, insert one end of multiple thin-walled metal pipes into the periphery of the plug socket 221, and pass the middle part of the thin-walled metal pipes through the rotation cavity 330, so that each thin-walled metal pipe is fixed at least two points in the axial direction.

[0065] Then, the third sliding seat 103 is slid to allow multiple thin-walled metal tubes to extend into the cutting cavity 423. At this time, the starting gear 213 and the plug seat 221 drive multiple tubes to revolve around a common axis, while each tube rotates around its own axis.

[0066] Next, the laser head 440 sprays a laser beam in a horizontal direction to melt the thin-walled metal pipe passing through point M. The jet head 430 then sprays auxiliary gas: on the one hand, it accelerates the cooling of the molten slag and causes it to solidify; on the other hand, the blowing force of the auxiliary gas blocks the molten slag generated at point M, preventing the slag from rotating synchronously with the uncut pipe and blowing the solidified slag into the cutting cavity 423, thereby preventing the two sections of pipe that should be cut from re-adheding due to the molten slag back filling the cut.

[0067] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined positioning and processing device for wheelchair accessories, comprising a first sliding seat (101), a second sliding seat (102), and a third sliding seat (103) slidably connected to the top of a base (100), wherein a drive assembly (200), an auxiliary positioning assembly (300), and a cutting assembly (400) are respectively mounted on the top of the first sliding seat (101), the second sliding seat (102), and the third sliding seat (103), characterized in that: The drive assembly (200) includes a revolution component and multiple rotation components, and multiple pipes pass through the auxiliary positioning assembly (300) to fix at least two points of each pipe in its own axial direction; The cutting assembly (400) includes a third mounting base (410) fixedly connected to the top of the third sliding base (103). A protective positioning member (420) is fixedly sleeved inside the third mounting base (410). A positioning hole (450) is opened on the outer side wall of the protective positioning member (420). An air jet head (430) and a laser head (440) are provided on the outer side of the positioning hole (450). The laser head (440) jets a laser beam in a horizontal direction. When the pipe rotates to the positioning hole (450), and the center of rotation of the pipe and the center of revolution of the pipe are in the same horizontal plane, the focal point of the laser head (440) on the pipe is point M, and the tangent point between the path of the gas blown out by the jet head (430) and the outer wall of the pipe is point N. Along the rotation direction of the pipe, point N is located upstream of point M, which is used to prevent the slag generated at point M from following the rotation of the pipe. The blowing direction of the jet head (430) is perpendicular to the axis of the thin-walled metal tube, and the angle between the blowing direction of the jet head (430) and the direction of the laser beam emitted by the laser head (440) is an acute angle. Along the direction parallel to the tube, the height of point N is lower than the height of point M. The auxiliary positioning component (300) includes a second mounting base (310) fixedly connected to the second sliding seat (102). A revolution arm (320) is rotatably connected inside the second mounting base (310). A plurality of rotation cavities (330) are rotatably connected on the revolution arm (320). Each rotation cavity (330) is rotatably connected to the revolution arm (320) for fixing the pipe passing through the rotation cavity (330) at least at two points. The central angle corresponding to the positioning hole (450) is an acute angle. When the thin-walled metal tube rotates to the point where its own axis is on the same horizontal plane as the focal point of the laser head (440), point M is tangent to the thin-walled metal tube. The protective positioning component (420) includes an outer interlayer (421) fixedly connected to the third mounting base (410), and an inner interlayer (422) is provided inside the third mounting base (410) at intervals. The outer interlayer (421) and the inner interlayer (422) form a cutting cavity (423). The width of the cutting cavity (423) is adapted to the diameter of the thin-walled metal pipe to prevent molten slag from splashing due to the high-speed rotation of the pipe.

2. The combined positioning and processing equipment for wheelchair parts according to claim 1, characterized in that: The orbital component includes a pair of first mounting seats (210) fixedly connected to the first sliding seat (101). The two first mounting seats (210) are symmetrically arranged, and the inner rings of the two first mounting seats (210) are slidably connected to rotating arms (211). The rotating arms (211) have multiple mounting cavities (214) inside, and the multiple mounting cavities (214) are arranged in a ring array around the axis of the rotating arms (211).

3. The combined positioning and processing equipment for wheelchair parts according to claim 2, characterized in that: The outer wall of the rotating arm (211) is fixedly connected to an annular rack (212), and the top of the first mounting base (210) is rotatably connected to a gear (213), which meshes with the annular rack (212).

4. The combined positioning and processing equipment for wheelchair parts according to claim 2, characterized in that: The self-rotating component includes a bearing seat (220) and a plug seat (221) disposed in the mounting cavity (214). The bearing seat (220) has a fixed part and a movable part. The fixed part is fixedly connected to the inner wall of the mounting cavity (214), and the movable part is coaxially connected to the plug seat (221).

5. The combined positioning and processing equipment for wheelchair parts according to claim 4, characterized in that: The rotating arm (211) rotates in the opposite direction to the plug-in seat (221). Along the direction of rotation of the plug-in seat (221), the pipe cut is located downstream of the uncut position.

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