Numerical control machining device based on rail transit mechanical parts

Abstract

The invention relates to the technical field of part machining, and discloses a numerical control machining device based on rail transit mechanical parts, the numerical control machining device comprises a machining table, supporting plates and a torsion bar, the supporting plates are symmetrically and fixedly connected to the upper surface of the machining table, the torsion bar is arranged at the top of the machining table, and a grinding mechanism is arranged at the top of the machining table; and a cleaning mechanism is arranged at the top of the machining table, the polishing mechanism comprises a driving motor fixedly connected to the outer wall of the supporting plate, fixing plates are symmetrically and fixedly connected to the upper surface of the machining table, and dust collecting boxes are fixedly connected to the upper surfaces of the fixing plates. Dust scraping is conducted on the torsion bar through the rubber plate, dust scraping is conducted on the grinding abrasive belt through the scraping block, the dust is prevented from being attached to the surface of the grinding abrasive belt, the dust is also prevented from being embedded into holes of the grinding abrasive belt and the torsion bar under the action of high temperature and pressure, then the uneven grinding capacity of the torsion bar is prevented, and the grinding effect of the grinding abrasive belt on the torsion bar is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of parts processing, and in particular to a numerical control processing device based on rail transportation machinery parts. Background Art

[0002] Parts processing is a process that uses mechanical, chemical and electronic technologies to transform raw materials into parts that meet design standards. Parts processing plays a vital role in modern industrial production. It not only meets the needs of various industries for parts, but also greatly promotes the development of the manufacturing industry. In today's advanced manufacturing industry, mechanical parts processing provides key support for various fields of manufacturing with its exquisite craftsmanship and rigorous attitude. Through precise processing technology, it is possible to achieve precise control of the size and shape of parts, thereby ensuring the performance and reliability of the product. At the same time, reliable and stable parts processing can also greatly improve production efficiency and reduce production costs, which is particularly important for modern manufacturing.

[0003] A Chinese invention patent with publication number CN118617261A discloses a torsion bar manufacturing and grinding machine for transportation vehicles, comprising: a processing table, which is used to support the processing equipment; a grinding device, which is used to grind the outer surface of the torsion bar; a tightening device, which is used to tighten and fix the two ends of the torsion bar to be polished; the bottom of the grinding device is fixedly connected to the top of the processing table through a bracket, and the bottom of the tightening device is fixedly connected to the top of the processing table; wherein the grinding device comprises: an annular slide rail, the interior of the annular slide rail is slidably connected to the electric slide rail through an electric slider, and the interior of the electric slide rail is slidably connected to a moving plate through an electric slider. This torsion bar manufacturing and grinding machine for transportation vehicles can perform all-round grinding on the outer surface of the torsion bar, and can grind torsion bars of different diameters, thereby improving the adaptability of the device.

[0004] In addition, when the torsion bar is polished by a grinding belt, the dust of the sand belt will exert pressure on the surface of the torsion bar during the polishing process. Some of the powder particles cut off by the dust are embedded in the gaps of the sand belt due to the high temperature and pressure generated by grinding, or are mixed with the grinding materials on the surface of the sand belt and adhered together. Although the suction of the vacuum cleaner can suck away most of the dust on the surface, it is difficult to completely remove it. Therefore, as the polishing proceeds, the dust gradually adheres to the surface of the sand belt, which will make the grinding ability of the sand belt uneven, thereby affecting the polishing effect of the torsion bar surface. At the same time, the invention uses the blowing pipe and the suction pipe to blow air to one end of the torsion bar and suck air to the other end, which is convenient for vacuuming the middle of the torsion bar. In this process, the abrasive is easily lifted and diffused into the air, causing environmental pollution and driving problems. Therefore, the torsion bar manufacturing and grinding machine for transportation vehicles disclosed in the Chinese invention patent CN118617261A cannot clean the dust attached to the torsion bar and the sand belt surface, nor can it ensure that the dust can be completely absorbed after being lifted. Summary of the invention

[0005] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides a CNC machining device based on rail transit machinery parts, which has the advantages of cleaning attached dust and avoiding dust from being raised, and solves the problems of poor grinding effect of torsion rods and dust pollution of the environment.

[0006] (II) Technical solution To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a CNC machining device based on rail transit machinery parts, comprising a machining table, a support plate and a torsion bar, wherein the support plate is symmetrically fixedly connected to the upper surface of the machining table, the torsion bar is arranged on the top of the machining table, a grinding mechanism is arranged on the top of the machining table, and a cleaning mechanism is arranged on the top of the machining table.

[0007] Preferably, the grinding mechanism includes a driving motor fixedly connected to the outer wall of the support plate, a fixed plate is symmetrically fixedly connected to the upper surface of the processing table, a dust box is fixedly connected to the upper surface of the fixed plate, a rotating table is rotatably connected to the middle part of the dust box, a telescopic rod is fixedly connected to the end of the rotating table away from the support plate, an adjusting frame is symmetrically fixedly connected to the outer wall of the dust box on a side away from the support plate, and a sliding groove is symmetrically provided on the side of the adjusting frame away from the dust box.

[0008] Preferably, the grinding mechanism also includes a moving rod slidably connected to the inside of the slide groove, the moving rod is rotatably connected to a roller rod on the outer wall on the side away from the adjusting frame, a grinding belt is transmission-connected between the two roller rods, an air guide pipe 1 is symmetrically rotationally connected to the outer wall on the side of the dust box away from the support plate, a transmission wheel is fixedly connected to the outer wall of the air guide pipe 1 away from one end of the dust box, a conveyor belt is transmission-connected between the transmission wheel and the roller rod, an air guide pipe 2 is fixedly connected to the outer wall on the side of the transmission wheel away from the air guide pipe 1, and a dust collector is fixedly connected between the two air guide pipes 2.

[0009] Preferably, the torsion bar is clamped between two telescopic rods, the moving rod is electrically connected to the driving motor, the roller rod is electrically connected to the driving motor, and the air guide tube is rotatably connected to the adjustment frame.

[0010] Preferably, the vacuum cleaner is connected to the interior of air duct 2, the air duct 1 is connected to the interior of the dust collecting box, the air duct 1 is connected to the interior of air duct 2, and the vacuum cleaner is provided with six air suction holes.

[0011] Preferably, the cleaning mechanism includes a dust collecting trough plate fixedly connected to the upper surface of the processing table, the top of the dust collecting trough plate is symmetrically rotatably connected to a fixed rod 1, a baffle is symmetrically fixedly connected to the outer wall of the fixed rod 1, a torsion spring is symmetrically sleeved on the outer wall of the fixed rod 1, a scraper is fixedly connected to the outer wall of the middle part of the fixed rod 1, and scraper blocks are fixedly connected to the inner wall of the scraper in a linear array.

[0012] Preferably, the cleaning mechanism also includes a second fixed rod symmetrically passing through and slidingly connected to the top of the dust collecting trough plate, a spring is sleeved on the outer wall of the second fixed rod, a resistance plate is fixedly connected to the top of the second fixed rod, a rubber plate is fixedly connected to the upper surface of the resistance plate, a hinge block one is symmetrically fixedly connected to the outer wall of the resistance plate, a hinge block two is symmetrically fixedly connected to the outer wall of the scraper, and a bracket is hinged between the second hinge block and the first hinge block.

[0013] Preferably, the two ends of the torsion spring are respectively fixedly connected to the baffle plate and the dust collecting slot plate, and the two ends of the spring are respectively fixedly connected to the dust collecting slot plate and the contact plate.

[0014] Preferably, the bottom end of the scraper is located inside the dust collecting trough plate, and the scraper is always in contact with the outer wall of the grinding belt, and the rubber plate is always in contact with the outer wall of the torsion bar.

[0015] Preferably, an annular groove is provided on the outer wall of the second air guide tube, and the second hinge block rotates inside the annular groove provided in the second air guide tube.

[0016] Beneficial Effects Compared with the prior art, the present invention provides a CNC machining device based on rail transit machinery parts, which has the following beneficial effects: 1. The torsion bar is scraped by a rubber sheet and the grinding belt is scraped by a scraper block, which prevents dust from adhering to the surface of the grinding belt and embedding into the pores of the grinding belt and the torsion bar under the action of high temperature and pressure, thereby preventing uneven grinding ability of the torsion bar and improving the grinding effect of the grinding belt on the torsion bar.

[0017] 2. The dust around the torsion bar is absorbed by the rotation of the vacuum cleaner, which prevents the dust from being lifted up by the centrifugal force and inertia force generated by the high-speed rotation and reciprocating motion of the sanding belt, and prevents the dust from diffusing into the air. This not only expands the space range of dust collection, but also improves the dust collection efficiency of the vacuum cleaner.

[0018] 3. The rubber plate moves downward to drive the scraper to always contact the sanding belt, so as to scrape the sanding belt with different degrees of tension, improve the flexibility of the equipment, and also improve the efficiency of cleaning the attached dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a CNC machining device based on rail transit machinery parts proposed by the present invention; Figure 2 This is a schematic diagram of the local structure of a grinding mechanism in a numerical control processing device for rail transportation machinery parts proposed by the present invention; Figure 3 This is a schematic diagram of the structure of a fixed plate and a roller rod in a numerical control processing device for rail transportation machinery parts proposed by the present invention; Figure 4 The present invention proposes a numerical control processing device based on rail transportation machinery parts Figure 4 The enlarged structural diagram at A in the middle; Figure 5 This is a schematic diagram of the structure of an air guide pipe and a dust collector in a numerical control processing device for rail transportation machinery parts proposed by the present invention; Figure 6 This is a schematic diagram of the partial structure of a cleaning mechanism in a numerical control processing device for rail transportation machinery parts proposed by the present invention; Figure 7 This is a schematic diagram of the structure of a dust collecting trough plate and a scraper block in a numerical control processing device based on rail transportation machinery parts proposed by the present invention; Figure 8 This is a structural schematic diagram of a fixed rod and an articulated block in a CNC machining device for rail transit machinery parts proposed by the present invention.

[0020] In the figure: 1. processing table; 2. support plate; 3. grinding mechanism; 31. driving motor; 32. fixed plate; 33. dust box; 34. rotating table; 35. telescopic rod; 36. adjustment frame; 37. slide; 38. moving rod; 39. roller rod; 310. grinding belt; 311. air guide pipe 1; 312. transmission wheel; 313. conveyor belt; 314. air guide pipe 2; 315. vacuum cleaner; 4. cleaning mechanism; 41. dust collecting trough plate; 42. fixed rod 1; 43. baffle; 44. torsion spring; 45. scraper; 46. scraper block; 47. fixed rod 2; 48. spring; 49. contact plate; 410. rubber plate; 411. hinge block 1; 412. hinge block 2; 413. bracket; 5. torsion bar. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example: See attached Figures 1 to 8 As shown, a CNC machining device based on rail transit machinery parts includes a machining table 1, a support plate 2 and a torsion bar 5, the support plate 2 is symmetrically fixedly connected to the upper surface of the machining table 1, the torsion bar 5 is arranged on the top of the machining table 1, a grinding mechanism 3 is arranged on the top of the machining table 1, and a cleaning mechanism 4 is arranged on the top of the machining table 1.

[0023] Furthermore, the grinding mechanism 3 includes a driving motor 31 fixedly connected to the outer wall of the support plate 2, a fixed plate 32 is symmetrically fixedly connected to the upper surface of the processing table 1, a dust box 33 is fixedly connected to the upper surface of the fixed plate 32, a rotating table 34 is rotatably connected through the middle of the dust box 33, a telescopic rod 35 is fixedly connected to the end of the rotating table 34 away from the support plate 2, the torsion bar 5 is clamped between the two telescopic rods 35, and an adjusting frame 36 is symmetrically fixedly connected to the outer wall of the dust box 33 on the side away from the support plate 2, and a slide groove 37 is symmetrically opened on the side of the adjusting frame 36 away from the dust box 33.

[0024] Furthermore, the grinding mechanism 3 also includes a moving rod 38 slidably connected to the inside of the slide groove 37, and there is an electrical connection between the moving rod 38 and the drive motor 31. The outer wall of the moving rod 38 on the side away from the adjustment frame 36 is rotatably connected to a roller rod 39, and the roller rod 39 is electrically connected to the drive motor 31. A grinding belt 310 is transmission-connected between the two roller rods 39. An air guide pipe 311 is symmetrically rotatably connected to the outer wall of the dust box 33 on the side away from the support plate 2. The air guide pipe 311 is connected to the inside of the dust box 33, and the air guide pipe 311 is connected to the inside of the dust box 33. The air duct 1 311 is rotatably connected to the adjusting frame 36, a transmission wheel 312 is fixedly connected to the outer wall of the air duct 1 311 away from the dust collecting box 33, a conveyor belt 313 is transmission-connected between the transmission wheel 312 and the roller rod 39, an air duct 2 314 is fixedly connected to the outer wall of the transmission wheel 312 away from the air duct 1 311, the air duct 1 311 is connected to the inside of the air duct 2 314, a dust collector 315 is fixedly connected between the two air duct 2 314, the dust collector 315 is provided with six suction holes, and the dust collector 315 is connected to the inside of the air duct 2 314.

[0025] By sliding the moving rod 38 inside the slide groove 37, the torsion bars 5 of different sizes can be polished. At the same time, the roller rod 39 drives the vacuum cleaner 315 to rotate, so that the vacuum cleaner 315 absorbs the dust around the torsion bar 5, thereby improving the dust collection effect of the vacuum cleaner 315 and preventing dust from being raised into the air.

[0026] It should be noted that the rotation speed of the telescopic rod 35 is lower than the rotation speed of the roller rod 39 , and the conveyor belt 313 can be stretched.

[0027] Furthermore, the cleaning mechanism 4 includes a dust collecting trough plate 41 fixedly connected to the upper surface of the processing table 1, the top of the dust collecting trough plate 41 is symmetrically rotatably connected to a fixing rod 42, a baffle 43 is symmetrically fixedly connected to the outer wall of the fixing rod 42, a torsion spring 44 is symmetrically sleeved on the outer wall of the fixing rod 42, and the two ends of the torsion spring 44 are respectively fixedly connected to the baffle 43 and the dust collecting trough plate 41, a scraper 45 is fixedly connected to the outer wall of the middle part of the fixing rod 42, the bottom end of the scraper 45 is inside the dust collecting trough plate 41, and the scraper 45 always contacts the outer wall of the grinding belt 310, and scraper blocks 46 are fixedly connected in a linear array on the inner wall of the scraper 45.

[0028] Furthermore, the cleaning mechanism 4 also includes a fixed rod 47 symmetrically passing through the top of the dust collecting slot plate 41 and slidingly connected thereto, a spring 48 is sleeved on the outer wall of the fixed rod 47, a contact plate 49 is fixedly connected to the top of the fixed rod 47, two ends of the spring 48 are respectively fixedly connected to the dust collecting slot plate 41 and the contact plate 49, a rubber plate 410 is fixedly connected to the upper surface of the contact plate 49, the rubber plate 410 always contacts the outer wall of the torsion bar 5, a hinge block 411 is symmetrically fixedly connected to the outer wall of the contact plate 49, a hinge block 412 is symmetrically fixedly connected to the outer wall of the scraper 45, an annular groove is provided on the outer wall of the air guide pipe 314, and the hinge block 412 rotates inside the annular groove provided in the air guide pipe 314, and a bracket 413 is hingedly connected between the hinge block 412 and the hinge block 411.

[0029] The rubber sheet 410 is used to scrape off the dust attached to the torsion bars 5 of different sizes, and the scraping block 46 is used to scrape off the dust attached to the surface of the grinding belt 310, thereby avoiding excessive dust on the surface of the grinding belt 310 and the torsion bar 5, and improving the grinding effect of the grinding belt 310 on the torsion bar 5.

[0030] The following is the working process and principle of the above embodiment: The initial state is as follows: the telescopic rod 35 is not fully extended, the fixed rod 47 is not fully compressed, the torsion spring 44 is not fully twisted, the scraper block 46 and the sanding belt 310 are in contact, and the torsion bar 5 and the rubber plate 410 are in full contact.

[0031] The working steps are as follows: The operator puts the torsion bar 5 from the top of the sanding belt 310 between the two sanding belts 310, so that the operator electrically controls the telescopic rod 35 to extend between the two sanding belts 310 through the driving motor 31. At the same time, the operator electrically controls the moving rod 38 to slide inside the slide groove 37 toward the side close to the torsion bar 5 through the driving motor 31, until the torsion bar 5 is clamped by the telescopic rod 35 and remains motionless. At this time, the moving rod 38 drives the roller rod 39 to move synchronously, so that the moving rod 38 drives the roller rod 39 to stretch the conveyor belt 313. The roller rod 39 drives the grinding belt 310 to move to a position in contact with the outer wall of the torsion bar 5. At this time, the operator electrically controls the rotating table 34 through the driving motor 31 to start rotating inside the dust box 33, so that the rotating table 34 drives the telescopic rod 35 to rotate synchronously, and the telescopic rod 35 drives the torsion bar 5 to rotate synchronously. At the same time, the operator electrically controls the roller rod 39 through the driving motor 31 to rotate on the outer wall of the moving rod 38, so that the roller rod 39 drives the grinding belt 310 to rotate synchronously, so that the grinding belt 310 grinds the torsion bar 5.

[0032] During the rotation of the roller rod 39, the roller rod 39 drives the transmission wheel 312 to rotate synchronously through the transmission belt 313 connected thereto, so that the transmission wheel 312 drives the air duct 1 311 to rotate on the outer wall of the dust collecting box 33, and the air duct 1 311 drives the air duct 2 314 to rotate synchronously, and then the air duct 2 314 drives the vacuum cleaner 315 to rotate synchronously at the four corners outside the torsion bar 5. The dust around the torsion bar 5 is absorbed by the rotation of the vacuum cleaner 315, which avoids the dust being lifted up by the centrifugal force and inertia force generated by the high-speed rotation and reciprocating motion of the gauze sanding belt, and prevents the dust from diffusing into the air, which not only expands the spatial range of dust collection, but also improves the dust collection efficiency of the vacuum cleaner 315.

[0033] When the torsion bar 5 is placed between the two grinding belts 310, the torsion bar 5 presses the rubber plate 410 downward, so that the rubber plate 410 presses the plate 49 downward, so that the contact plate 49 drives the spring 48 to slide downward inside the dust collecting slot plate 41, so that the contact plate 49 presses the fixed rod 2 47 downward to shrink, and at the same time, the contact plate 49 drives the top of the bracket 413 hinged thereto to move vertically downward through the hinge block 1 411, so that the bracket 413 drives the hinge block 2 412 to move toward the outside of the dust collecting slot plate 41 under the resistance of the hinge block 1 411, so that the hinge block 2 412 drives the top of the scraper 45 hinged thereto to flip around the fixed rod 1 42 as the axis, so that the top of the scraper 45 flips to the side away from the contact plate 49, so that the scraper 45 drives the scraper block 46 to flip synchronously, and then the scraper 45 drives the fixed rod 1 42 to rotate on the top of the dust collecting slot plate 41, so that the fixed The rod 1 42 drives the baffle 43 to rotate synchronously, so that the baffle 43 drives the torsion spring 44 to rotate, and finally the scraper 45 drives the scraper block 46 to contact the outer wall of the grinding belt 310. When the grinding belt 310 rotates, the grinding belt 310 drives the dust attached to its surface to contact the scraper block 46, so that the scraper block 46 scrapes the dust on the surface of the scraper 45. At the same time, during the rotation of the torsion bar 5, the rubber plate 410 The dust is scraped off, and then the scraped dust slides into the dust collecting trough plate 41 through the scraper 45, and finally the dust collector 315 absorbs the dust inside the dust collecting trough plate 41, thereby preventing the dust from adhering to the surface of the grinding belt 310, and also preventing the dust from being embedded in the pores of the grinding belt 310 and the torsion bar 5 under the action of high temperature and pressure, thereby preventing the uneven grinding ability of the torsion bar 5 and improving the grinding effect of the grinding belt 310 on the torsion bar 5.

[0034] It should be noted that the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A numerical control processing device based on rail transportation machinery parts, comprising a processing table (1), a support plate (2) and a torsion bar (5), wherein the support plate (2) is symmetrically fixedly connected to the upper surface of the processing table (1), and the torsion bar (5) is arranged on the top of the processing table (1), characterized in that: A grinding mechanism (3) is provided on the top of the processing table (1), and a cleaning mechanism (4) is provided on the top of the processing table (1).

2. A CNC machining device based on rail transit machinery parts according to claim 1, characterized in that: The grinding mechanism (3) comprises a driving motor (31) fixedly connected to the outer wall of the support plate (2); a fixing plate (32) is symmetrically fixedly connected to the upper surface of the processing table (1); a dust box (33) is fixedly connected to the upper surface of the fixing plate (32); a rotating table (34) is rotatably connected to the middle of the dust box (33); a telescopic rod (35) is fixedly connected to one end of the rotating table (34) away from the support plate (2); an adjusting frame (36) is symmetrically fixedly connected to the outer wall of the dust box (33) on a side away from the support plate (2); and a sliding groove (37) is symmetrically provided on the side of the adjusting frame (36) away from the dust box (33).

3. A CNC machining device based on rail transit machinery parts according to claim 2, characterized in that: The grinding mechanism (3) further comprises a moving rod (38) slidably connected to the inside of the slide groove (37); a roller rod (39) is rotatably connected to the outer wall of the moving rod (38) on the side away from the adjustment frame (36); a grinding belt (310) is transmission-connected between the two roller rods (39); an air guide pipe 1 (311) is symmetrically rotationally connected to the outer wall of the dust box (33) on the side away from the support plate (2); a transmission wheel (312) is fixedly connected to the outer wall of the air guide pipe 1 (311) at one end away from the dust box (33); a transmission belt (313) is transmission-connected between the transmission wheel (312) and the roller rod (39); an air guide pipe 2 (314) is fixedly connected to the outer wall of the transmission wheel (312) on the side away from the air guide pipe 1 (311); and a dust collector (315) is fixedly connected between the two air guide pipes 2 (314).

4. The CNC machining device for rail transportation machinery parts according to claim 3 is characterized in that: The torsion bar (5) is clamped between two telescopic rods (35), the moving rod (38) is electrically connected to the drive motor (31), the roller rod (39) is electrically connected to the drive motor (31), and the air guide tube 1 (311) is rotatably connected to the adjustment frame (36).

5. The CNC machining device for rail transportation machinery parts according to claim 4 is characterized in that: The vacuum cleaner (315) is connected to the interior of the second air duct (314), the first air duct (311) is connected to the interior of the dust collecting box (33), the first air duct (311) is connected to the interior of the second air duct (314), and the vacuum cleaner (315) is provided with six air suction holes.

6. The CNC machining device for rail transportation machinery parts according to claim 3 is characterized in that: The cleaning mechanism (4) comprises a dust collecting trough plate (41) fixedly connected to the upper surface of the processing table (1); the top end of the dust collecting trough plate (41) is symmetrically rotatably connected to a fixing rod (42); a baffle (43) is symmetrically fixedly connected to the outer wall of the fixing rod (42); a torsion spring (44) is symmetrically sleeved on the outer wall of the fixing rod (42); a scraper (45) is fixedly connected to the outer wall of the middle part of the fixing rod (42); and scraping blocks (46) are fixedly connected to the inner wall of the scraper (45) in a linear array.

7. A CNC machining device based on rail transportation machinery parts according to claim 6, characterized in that: The cleaning mechanism (4) further comprises a second fixing rod (47) symmetrically penetrating the top of the dust collecting trough plate (41) and being slidably connected thereto; a spring (48) is sleeved on the outer wall of the second fixing rod (47); a contact plate (49) is fixedly connected to the top of the second fixing rod (47); a rubber plate (410) is fixedly connected to the upper surface of the contact plate (49); a hinge block (411) is symmetrically fixedly connected to the outer wall of the contact plate (49); a second hinge block (412) is symmetrically fixedly connected to the outer wall of the scraper (45); a bracket (413) is hingedly connected between the second hinge block (412) and the first hinge block (411).

8. The CNC machining device for rail transportation machinery parts according to claim 7 is characterized in that: The two ends of the torsion spring (44) are respectively fixedly connected to the baffle plate (43) and the dust collecting slot plate (41), and the two ends of the spring (48) are respectively fixedly connected to the dust collecting slot plate (41) and the contact plate (49).

9. The CNC machining device for rail transportation machinery parts according to claim 7, characterized in that: The bottom end of the scraper (45) is located inside the dust collecting trough plate (41), and the scraper (45) always contacts the outer wall of the grinding belt (310), and the rubber plate (410) always contacts the outer wall of the torsion bar (5).

10. A numerical control processing device based on rail transportation machinery parts according to claim 9, characterized in that: An annular groove is provided on the outer wall of the second air guide tube (314), and the second hinge block (412) rotates inside the annular groove provided on the second air guide tube (314).

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