A round tube end grinding device

Abstract

The present invention discloses a round tube end grinding device, which belongs to the technical field of grinding equipment, and comprises a frame and two support frames, on which a pipe clamping assembly is installed, and the pipe clamping assembly comprises a base, and a rotating cavity is arranged inside the base; two rotating wheels are arranged inside the rotating cavity, and an elongated groove is arranged on the side wall of the rotating wheel; the present invention can clamp the round tube during the rotation process through two synchronous but reversely rotating rotating wheels to ensure its stable fixation. When the two elongated grooves are just rotated to the same horizontal line and the openings are opposite, the end of the round tube is positioned between the two grooves, and automatic positioning and clamping are realized. At this time, the grinding assembly performs a grinding operation on the end of the round tube, which reduces the complexity and error rate of manual operation. Subsequently, the rotating wheel continues to rotate, and the two elongated grooves completely overlap under the rotating wheel. The round tube that has been polished can slide smoothly along the elongated groove, and the automation and continuity of the grinding process are realized.

Description

Technical Field

[0001] The invention relates to a round tube end grinding device, belonging to the technical field of grinding equipment. Background Art

[0002] In the round tube processing industry, the end grinding of the round tube is a crucial link, which is directly related to the appearance quality, sealing performance and convenience of subsequent assembly of the product. Traditionally, this process relies on manual operation, which is not only inefficient, but also prone to problems such as uneven grinding and dimensional deviation due to human factors, increasing production costs and scrap rates. Therefore, a round tube end grinding device is proposed. Summary of the invention

[0003] The purpose of the present invention is to provide a round tube end grinding device to solve the problems raised in the above background technology.

[0004] In order to achieve the above object, the present invention adopts the following technical solution: a round tube end grinding device, comprising:

[0005] frame;

[0006] Two support frames, the two support frames are symmetrically mounted on the frame, and the distance between the two support frames is adjustable;

[0007] A pipe clamping assembly is installed on each of the two support frames, and is used to support and clamp the two ends of the round pipe respectively;

[0008] A grinding assembly, which is fixed on the side wall of the support frame and is used to grind the end of the round tube;

[0009] Wherein, the tube clamping assembly comprises:

[0010] A base, the base is fixed on the support frame, and a rotating cavity is arranged inside the base;

[0011] Rotating wheel, two rotating wheels are arranged inside the rotating cavity, the two rotating wheels are arranged coaxially, and the two rotating wheels rotate in opposite directions, a U-shaped long groove is opened on the side wall of the rotating wheel along its radius, and the cross section of one end of the long groove close to the axis of the rotating wheel is semicircular, and the center of the semicircle coincides with the axis of the rotating wheel;

[0012] A plurality of support rollers are circumferentially distributed around the rotating wheel, and ends of the support rollers are rotatably connected to the side walls of the base.

[0013] Preferably, among the multiple support rollers in the same rotating chamber, two support rollers are used as active rollers to respectively drive the corresponding rotating wheels to rotate;

[0014] A driving gear is fixedly sleeved on each of the two driving rollers, and a tooth wall is fixed in the middle of each rotating wheel, and the driving gears on the two driving rollers are respectively meshed and connected with the tooth walls on the corresponding rotating wheels;

[0015] Two corresponding active rollers located in different rotating chambers are connected through a joint rotating assembly.

[0016] Preferably, the coupling assembly comprises:

[0017] A first sleeve and a second sleeve, wherein the first sleeve and the second sleeve are coaxially connected to corresponding support rollers respectively, and one end of the second sleeve is slidably sleeved inside the first sleeve;

[0018] A rotation limiting groove is provided on the side wall of the second sleeve along the axis of the second sleeve.

[0019] A rotation-limiting bolt is arranged on the side wall of the first sleeve, and a threaded end of the rotation-limiting bolt penetrates the side wall of the first sleeve and extends to the interior of the rotation-limiting groove.

[0020] Preferably, the coupling assembly further comprises two mutually meshing connecting gears, the two connecting gears being arranged on the side walls of the support frame, one connecting gear being connected to the end of an active roller, and the other connecting gear being connected to the other active roller via a chain.

[0021] Preferably, a sink is provided at the bottom of the elongated groove, and a slider is slidably connected to the inside of the sink through a spring, and the end of the slider close to the elongated groove is a pressing surface for pressing the side wall of the circular tube, and a rolling groove is provided on the outer ring side wall of the rotating wheel, and a protrusion extending to the inside of the rolling groove is provided on the slider, and a pressure wheel is sleeved on the support roller, and the pressure wheel is rollingly connected to the inside of the rolling groove, and when the elongated groove rotates to a horizontal state, the pressure wheel presses the slider toward the elongated groove through the protrusion, so that the pressing surface of the slider presses against the side wall of the circular tube.

[0022] Preferably, a rubber pad is fixedly connected to the top pressure surface of the sliding block.

[0023] Preferably, a plurality of limiting wheels are rotatably sleeved on the supporting roller, limiting grooves are provided on both sides of the outer ring of the rotating wheel, and the limiting wheels are rollingly connected to the inside of the corresponding limiting grooves.

[0024] Preferably, the grinding assembly includes a cylinder fixed on a support frame, a movable seat is fixed on the output shaft of the cylinder, a grinder is fixed on the movable seat, and a grinding head is fixed on the output shaft of the grinder. When the cylinder drives the movable seat to move, the grinding head on the grinder moves closer to or away from the end of the round tube.

[0025] Compared with existing technologies:

[0026] The present invention can clamp the round tube during the rotation process by means of two rotating wheels that rotate synchronously but in opposite directions, thereby ensuring that the round tube is stably fixed. When the two elongated grooves are rotated to the same horizontal line and their openings are opposite to each other, the end of the round tube is positioned between the two grooves, thereby achieving automatic positioning and clamping. At this time, the grinding component starts grinding the end of the round tube, thereby reducing the complexity and error rate of manual operation. Subsequently, with the continuous rotation of the rotating wheel, the openings of the two elongated grooves gradually deviate until they completely overlap under the rotating wheel. At this time, the round tube that has been polished can smoothly slide off along the elongated groove, thereby achieving the automation and continuity of the polishing process.

[0027] The two elongated grooves of the present invention rotate to a horizontal state, that is, they are exactly in the same straight line in the same rotating cavity and their openings are opposite to each other. At this time, the pressure wheel uses the protrusion on the slider to push the slider toward the elongated groove, and the top pressure surface of the slider gradually slides out from the inside of the sink groove and fits tightly on the side wall of the round tube clamped by the elongated groove, further realizing effective top pressure and firm clamping of the side wall of the round tube, and improving the stability of the grinding operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention.

[0029] Figure 2 It is a structural schematic diagram of the rotating wheel and the joint rotating assembly of the present invention.

[0030] Figure 3 It is an exploded view of the pipe clamping assembly of the present invention.

[0031] Figure 4 It is a schematic diagram of the structure of the rotating wheel and the supporting roller of the present invention.

[0032] Figure 5 It is a top view of the base and the rotating wheel of the present invention.

[0033] Figure 6 For the present invention Figure 5 Sectional view at AA.

[0034] Figure 7 It is a cross-sectional view of the rotating wheel, the sliding block, the protrusion, the rolling groove and the pressure wheel of the present invention.

[0035] Figure 8 It is a three-dimensional schematic diagram of a single rotating wheel of the present invention.

[0036] Fig. 9 It is a schematic diagram of the state of the present invention when clamping a round tube.

[0037] Fig.10 It is a cross-sectional view of the rotating wheel, the elongated groove, the sliding block, the protrusion, the rolling groove and the pressure wheel of the present invention.

[0038] Fig.11 It is a schematic diagram of the state when the elongated groove of the present invention clamps a round tube.

[0039] Fig.12 It is a schematic diagram of the state when the elongated slot of the present invention releases the round tube.

[0040] Fig.13 It is a cross-sectional view of the placement of the bucket, electric push rod, drive arm and V-shaped baffle rod of the present invention.

[0041] In the figure:

[0042] 1. frame, 2. support frame, 201. placing bucket, 202. discharge port;

[0043] 3. Tube clamping assembly, 301. base, 302. rotating wheel, 303. elongated groove, 304. supporting roller, 305. driving gear, 306. tooth wall, 307. limiting wheel, 308. limiting groove;

[0044] 4. grinding assembly, 401, oil cylinder, 402, moving seat, 403, grinding machine;

[0045] 5. Joint rotation assembly, 501. first sleeve, 502. second sleeve, 503. rotation limiting groove, 504. rotation limiting bolt, 505. connecting gear, 506. chain, 507. protective cover;

[0046] 6. spring, 7. slider, 701. protrusion, 702. rubber pad, 8. rolling groove, 9. pressure wheel;

[0047] 10. Electric push rod, 11. Driving arm, 12. V-shaped stop rod. DETAILED DESCRIPTION

[0048] The present invention is described below with specific embodiments, but they are not intended to be limiting of the invention.

[0049] Embodiment 1

[0050] like Figure 1-Figure 13 As shown, in this embodiment, a round tube end grinding device is provided, including a frame 1; two support frames 2 are symmetrically installed on the frame 1, one support frame 2 is fixed to one end of the frame 1, a slide rail is provided on the frame 1, and the bottom of the other support frame 2 is slidably installed on the slide rail, so that the distance between the two support frames 2 can be adjusted. After the distance is adjusted, it is fixed by a locking bolt to achieve the fixation of the distance between the two support frames 2; a pipe clamping assembly 3 is installed on each of the two support frames 2, which is used to support and clamp the two ends of the round tube respectively; a grinding assembly 4 is fixed on the side wall of the support frame 2, which is used to grind the end of the round tube;

[0051] Among them, a tube clamping assembly 3 includes a base 301, which is fixed on the support frame 2. A rotating chamber is arranged inside the base 301, and two rotating wheels 302 are arranged inside the rotating chamber. The two rotating wheels 302 are coaxially arranged, each rotating wheel 302 rotates at a constant speed, and the two rotating wheels 302 rotate in opposite directions. A U-shaped elongated groove 303 is opened on the side wall of the rotating wheel 302 along its radius. The cross-section of one end of the elongated groove 303 close to the axis of the rotating wheel 302 is semicircular, and the center of the semicircle coincides with the axis of the rotating wheel 302; a plurality of support rollers 304 are circumferentially distributed around the rotating wheel 302, and the ends of the support rollers 304 are rotatably connected to the side wall of the base 301.

[0052] The four rotating wheels 302 in the two clamping tube assemblies 3 are coaxially arranged, each rotating wheel 302 rotates at the same speed, and the two rotating wheels 302 in the same rotating chamber rotate in opposite directions.

[0053] like Figure 2 As shown, when the rotating wheel 302 is rotated, the four elongated slots 303 overlap and the openings are in an upward state, and the round tube can be inserted from the opening position of the elongated slots 303. The elongated slots 303 opened by the two rotating wheels 302 in the same rotating cavity jointly support one end of the round tube.

[0054] For the two rotating wheels 302 in the same rotating chamber, the two rotating wheels 302 rotate in opposite directions at the same speed, so that the two elongated grooves 303 rotate in opposite directions, and the two staggered elongated grooves 303 clamp the round tube. When the two elongated grooves 303 are in the same straight line and the openings are opposite to each other (such as Fig.11 As shown in the figure, the end of the round tube is clamped in the two elongated grooves 303. In this state, the end of the round tube can be polished using the polishing assembly 4. The two rotating wheels 302 are continuously rotated. At this time, the openings of the two elongated grooves 303 slowly deflect downward. When the two elongated grooves 303 overlap below the rotating wheel 302, the round tube can slide down along the elongated grooves 303 to complete the polishing operation on the end of the round tube. Then, the rotating wheel 302 is rotated in the opposite direction to reset the elongated grooves 303 to the state with the opening facing upward so as to perform the polishing of the next end of the round tube.

[0055] Combination Figure 1 and Fig.13As shown, the two support frames 2 are each provided with a placing bucket 201, and a plurality of round tubes can be suspended above the tube clamping assembly 3 by using the two placing buckets 201, and a channel for discharging the round tubes is provided below the placing bucket 201, and when the mouth of the elongated slot 303 is rotated to the top, the mouth of the elongated slot 303 is opposite to the channel, and the round tubes in the channel can automatically fall into the elongated slot 303 at this time, and in addition, an electric push rod 10, a driving arm 11 and a V-shaped baffle 12 are provided on the channel, and the round tubes in the channel can be discharged one by one, and the principle is as follows: the rear end of the electric push rod 10 is rotatably connected to the middle part of the V-shaped baffle 12 on the side wall of the channel, one end of the driving arm 11 is fixed to the middle part of the V-shaped baffle 12, and the other end is rotatably connected to the output shaft of the electric push rod 10, and the upper and lower ends of the V-shaped baffle 12 are alternately turned into the channel; as shown in FIG. Fig.13 As shown, it is assumed that there are round tubes a and b in the channel. After the lower end of the V-shaped blocking rod 12 is turned into the channel, its lower end blocks the round tube a to limit the falling of the round tubes a and b.

[0056] exist Fig.13 In the state shown, the electric push rod 10 pulls the driving arm 11 in the direction of the arrow, causing the V-shaped baffle 12 to rotate, and the lower end of the V-shaped baffle 12 rotates out of the channel, and the blocked round tube a falls freely. At the same time, the upper end of the V-shaped baffle 12 rotates into the channel to support the round tube b. At this time, the round tube a enters the elongated groove 303. Then, after the electric push rod 10 is reset, the upper end of the V-shaped baffle 12 rotates out of the channel, and the lower end thereof rotates into the channel. At this time, the round tube b in the channel falls a certain distance and is supported by the lower end of the V-shaped baffle 12, so that the round tube b can fall into the elongated groove 303 individually next time.

[0057] like Figure 1 As shown, a discharge port 202 is provided on the support frame 2. When the two elongated grooves 303 overlap below the rotating wheel 302, the round tube can slide down along the elongated grooves 303 to the discharge port 202 so that the polished round tube can be automatically discharged.

[0058] like Figure 1 , Figure 2 As shown, in order to drive the rotating wheel 302 to rotate, two supporting rollers 304 in the same rotating chamber are used as active rollers to respectively drive the corresponding rotating wheels 302 to rotate;

[0059] A driving gear 305 is fixedly sleeved on each of the two driving rollers, and a tooth wall 306 is fixed in the middle of each rotating wheel 302. The driving gears 305 on the two driving rollers are meshed and connected with the tooth walls 306 on the corresponding rotating wheels 302 respectively;

[0060] Two corresponding active rollers located in different rotating chambers are connected via a coupling assembly 5 .

[0061] The coupling assembly 5 includes a first sleeve 501 and a second sleeve 502. Figure 2 As shown, two corresponding active rollers located in different rotating chambers are coaxially arranged, and the first sleeve 501 and the second sleeve 502 are coaxially arranged between the two active rollers, wherein the first sleeve 501 is fixedly connected to the end of one active roller, and the second sleeve 502 is fixedly connected to the end of the other active roller, and the second sleeve 502 is slidably sleeved inside the first sleeve 501, and a limited rotation groove 503 is provided on the side wall of the second sleeve 502 along the axis of the second sleeve 502, and a limited rotation bolt 504 is provided on the side wall of the first sleeve 501 to limit The threaded end of the rotation bolt 504 passes through the side wall of the first sleeve 501 and extends to the inside of the rotation limiting groove 503. Under the cooperation of the rotation limiting groove 503 and the rotation limiting bolt 504, the two active rollers can be relatively moved axially, and the first sleeve 501, the second sleeve 502 and the two corresponding active rollers can always be kept rotating synchronously to adapt to the adjustment of the distance between the two clamping tube assemblies 3 so as to clamp round tubes of different lengths. In addition, the number of the rotation limiting bolts 504 can be multiple, which can enhance the connection stability of the rotation limiting bolts 504 and the rotation limiting groove 503.

[0062] like Figure 2 As shown, the coupling assembly 5 also includes two connecting gears 505 that mesh with each other. The two connecting gears 505 are arranged on the side walls of the support frame 2, wherein one connecting gear 505 is connected to the end of an active roller, and the other connecting gear 505 is connected to the other active roller through a chain 506. A protective cover 507 for covering the connecting gears 505 and the chain 506 is provided on the support frame 2, and a motor for driving the connecting gears 505 to rotate is also provided in the protective cover 507. The motor is an existing product, so it is not described in detail and is not shown in the figure.

[0063] like Figure 2 As shown, when the connecting gear 505 rotates, the two connecting gears 505 rotate in opposite directions at the same speed, thereby controlling the two active rollers in the same rotating cavity to rotate in opposite directions at the same speed. At this time, the active gears 305 on the two active rollers rotate in opposite directions at the same speed. Under the cooperation of the active gears 305 and the tooth wall 306, the two rotating wheels 302 in the same rotating cavity can be driven to rotate in opposite directions at the same speed.

[0064] A plurality of limiting wheels 307 are rotatably sleeved on the support roller 304. The limiting wheels 307 rotate along the axis of the corresponding support roller 304 and cannot move along the axis of the support roller 304. Limiting grooves 308 are provided on both sides of the outer ring of the rotating wheel 302. The limiting wheels 307 are rollingly connected to the inside of the corresponding limiting grooves 308. Under the cooperation of the limiting grooves 308 and the limiting wheels 307, the position of the rotating wheel 302 in the rotating cavity can be limited to prevent the rotating wheel 302 from axial movement.

[0065] The grinding assembly 4 includes an oil cylinder 401 fixed on the support frame 2, a movable seat 402 is fixed on the output shaft of the oil cylinder 401, a grinder 403 is fixed on the movable seat 402, a grinding head is fixed on the output shaft of the grinder 403, after the grinder 403 is started, the output shaft of the grinder 403 rotates with the grinding head, after the long groove 303 fixes the round tube, the end of the round tube is directly opposite to the grinding head, and a through hole for the grinding head to contact the end of the round tube is also provided on the support frame 2, when the oil cylinder 401 drives the movable seat 402 to move, the grinding head on the grinder 403 moves close to or away from the end of the round tube;

[0066] When the round tube is clamped, the oil cylinder 401 is started, and the oil cylinder 401 drives the rotating grinding head on the grinding machine 403 to move toward the round tube. At this time, the grinding head will contact the end of the round tube to achieve the grinding operation on the end of the round tube. After the grinding is completed, the oil cylinder 401 drives the grinding machine 403 and the grinding head to reset;

[0067] In addition, in order to facilitate the contact between the grinding head and the end of the round tube, a groove is provided on the central side wall of the rotating wheel 302 near the grinding end of the round tube, so that after the round tube is clamped, the end of the round tube will protrude from the elongated groove 303, so that the end of the round tube can fully contact with the grinding head;

[0068] In order to further improve the grinding efficiency of the ends of the round tube, two grinding assemblies 4 can be provided, and the two grinding assemblies 4 are respectively arranged on two support frames 2, so as to grind both ends of the round tube at the same time.

[0069] Embodiment 2

[0070] like Figure 5-Figure 10 As shown, in this embodiment, when the two elongated grooves 303 are in the same straight line and the openings are opposite to each other in the clamping state, in order to further improve the stability of clamping the round tube, a sink groove is provided at the bottom of the elongated groove 303, and the sink groove is connected to the elongated groove 303. The inside of the sink groove is slidably connected with a slider 7 through a spring 6. The end of the slider 7 close to the elongated groove 303 is a top pressure surface for pressing the side wall of the round tube. A rubber pad 702 is fixedly connected to the top pressure surface of the slider 7; combined with Figure 5-Figure 6 As shown, the slider 7 is installed into the sink groove from the elongated groove 303. Ear blocks are provided on both sides of the slider 7. Through holes for passing bolts are provided on the ear blocks. When installing, the spring 6 is first sleeved on the bolt, and then the threaded end of the bolt is passed through the through hole. At this time, the spring 6 is between the ear block and the big head end of the bolt. In this state, the slider 7, the bolt, and the spring 6 are installed into the sink groove, and then the threaded end of the bolt is engaged with the sink groove wall. At this time, the slider 7 is installed inside the sink groove. Under the elastic pressure of the spring 6, the slider 7 is completely sunk into the sink groove. At the same time, combined with Figure 7-10As shown, the protrusion 701 is located inside the rolling groove 8. The outer ring side wall of the rotating wheel 302 is provided with a rolling groove 8, and the slider 7 is provided with a protrusion 701 extending into the rolling groove 8. The support roller 304 is sleeved with a pressing wheel 9, and the pressing wheel 9 is rollingly connected to the inside of the rolling groove 8. When the elongated groove 303 rotates to a horizontal state, as shown in FIG. Figure 9-10 As shown, when the two elongated grooves 303 in the same rotating cavity are in a clamping state with their openings facing each other, the pressure wheel 9 presses the protrusion 701 to move the slider 7 toward the inside of the elongated groove 303, and the ear block moves with the slider 7 to compress the spring 6. At this time, the pressing surface of the slider 7 slides from the sink groove toward the side wall of the circular tube clamped in the elongated groove 303, so that the pressing surface of the slider 7 presses on the side wall of the circular tube.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A round tube end grinding device, characterized in that: include: Rack(1); Two support frames (2), the two support frames (2) being symmetrically mounted on the frame (1), and the distance between the two support frames (2) being adjustable; A pipe clamping assembly (3), each of the two support frames (2) is provided with a pipe clamping assembly (3), which is used to support and clamp the two ends of the round pipe respectively; A grinding assembly (4), the grinding assembly (4) being fixed on the side wall of the support frame (2) and being used for grinding the end of the circular tube; Wherein, the tube clamping assembly (3) comprises: A base (301), the base (301) being fixed on the support frame (2), and a rotating cavity being arranged inside the base (301); A rotating wheel (302), wherein two rotating wheels (302) are arranged inside the rotating chamber, the two rotating wheels (302) are coaxially arranged, and the two rotating wheels (302) rotate in opposite directions, a U-shaped elongated groove (303) is opened on the side wall of the rotating wheel (302) along its radius, and the cross section of one end of the elongated groove (303) close to the axis of the rotating wheel (302) is semicircular, and the center of the semicircle coincides with the axis of the rotating wheel (302); A plurality of support rollers (304), wherein the plurality of support rollers (304) are circumferentially distributed around the rotating wheel (302), and ends of the support rollers (304) are rotatably connected to the side wall of the base (301); Among the multiple support rollers (304) in the same rotating chamber, two support rollers (304) are used as active rollers to respectively drive the corresponding rotating wheels (302) to rotate; A driving gear (305) is fixedly sleeved on each of the two driving rollers, and a tooth wall (306) is fixed at the middle of each rotating wheel (302), and the driving gears (305) on the two driving rollers are respectively meshed and connected with the tooth walls (306) on the corresponding rotating wheels (302); Two corresponding active rollers located in different rotating chambers are connected via a joint rotating assembly (5); The coupling assembly (5) comprises: A first sleeve (501) and a second sleeve (502), wherein the first sleeve (501) and the second sleeve (502) are coaxially connected to corresponding support rollers (304), and one end of the second sleeve (502) is slidably sleeved inside the first sleeve (501); A rotation limiting groove (503), wherein the rotation limiting groove (503) is formed on a side wall of the second sleeve (502) along the axis of the second sleeve (502); a rotation-limiting bolt (504), the rotation-limiting bolt (504) being arranged on the side wall of the first sleeve (501), the threaded end of the rotation-limiting bolt (504) penetrating the side wall of the first sleeve (501) and extending to the interior of the rotation-limiting groove (503); The coupling assembly (5) further comprises two mutually meshing connecting gears (505), the two connecting gears (505) being arranged on the side wall of the support frame (2), one connecting gear (505) being connected to the end of an active roller, and the other connecting gear (505) being connected to the other active roller via a chain (506); The bottom of the elongated groove (303) is provided with a sink groove, the interior of the sink groove is slidably connected with a slider (7) via a spring (6), one end of the slider (7) close to the elongated groove (303) is a pressing surface for pressing the side wall of the circular tube, a rolling groove (8) is provided on the outer ring side wall of the rotating wheel (302), the slider (7) is provided with a protrusion (701) extending into the inside of the rolling groove (8), a pressing wheel (9) is sleeved on the support roller (304), and the pressing wheel (9) is rollingly connected to the inside of the rolling groove (8), when the elongated groove (303) rotates to a horizontal state, the pressing wheel (9) presses the slider (7) toward the elongated groove (303) via the protrusion (701), so that the pressing surface of the slider (7) presses against the side wall of the circular tube; A rubber pad (702) is fixedly connected to the top pressure surface of the slider (7); A plurality of limiting wheels (307) are rotatably sleeved on the support roller (304), limiting grooves (308) are provided on both sides of the outer ring of the rotating wheel (302), and the limiting wheels (307) are rollingly connected inside the corresponding limiting grooves (308).

2. A round tube end grinding device according to claim 1, characterized in that: The grinding assembly (4) comprises an oil cylinder (401) fixed on the support frame (2); a movable seat (402) is fixed on the output shaft of the oil cylinder (401); a grinder (403) is fixed on the movable seat (402); a grinding head is fixed on the output shaft of the grinder (403); when the oil cylinder (401) drives the movable seat (402) to move, the grinding head on the grinder (403) moves closer to or farther from the end of the circular tube.

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