Flange plate polishing device

Abstract

The flange plate grinding device solves the problem of double-face grinding of welding slag at a gap of a flange plate, a grinding table is arranged on a grinding frame in a sliding mode, an upper motor is movably arranged on the grinding frame, the upper motor is located in the vertical direction of a lower motor, an upper grinding head is arranged at the driving end of the upper motor, and a lower grinding head is arranged at the driving end of the lower motor. A third pressing block is arranged at the driving end of the first air cylinder, a second pressing block is arranged at the driving end of the second air cylinder, a lower grinding head is arranged at the driving end of the lower motor, the upper grinding head and the lower grinding head are opposite and arranged in a spaced mode, a fourth pressing block is arranged at the driving end of the sixth air cylinder, and the grinding table is located on the moving path of the third pressing block and the fourth pressing block. Welding slag at the gap of the flange plate is located between the upper grinding head and the lower grinding head, the upper grinding head and the lower grinding head abut against the welding slag on the upper face and the lower face of the flange plate, the upper grinding head and the lower grinding head are rotated, and therefore the welding slag on the two faces of the flange plate is ground, production efficiency is improved, and the double-face grinding problem of the welding slag at the gap of the flange plate is solved.

Description

Technical Field

[0001] The utility model relates to the field of polishing and grinding, in particular to a flange grinding device. Background Art

[0002] After the gap on the flange is welded, welding slag will be generated at the gap, and the welding slag needs to be polished. The usual flange grinding can only polish the welding slag on one side. After the grinding is completed, the flange is turned over and the welding slag on the other side is polished. Such a grinding device cannot polish the welding slag on two surfaces at the same time. The grinding efficiency is relatively low, resulting in lagging flange production capacity.

[0003] With regard to the shortcomings of the prior art, how to grind the welding slag on two surfaces at the same time is a problem that needs to be solved. Utility Model Content

[0004] The utility model aims to provide a flange grinding device, which solves the problem of double-sided grinding of welding slag at the gap of the flange.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The utility model provides a flange grinding device, comprising a grinding frame, on which a grinding table is slidably arranged, and characterized in that an upper motor and a lower motor are arranged on the grinding frame at intervals, the upper motor is movably arranged on the grinding frame, the upper motor is located in the vertical direction of the lower motor, an upper grinding head is arranged at the driving end of the upper motor, a lower grinding head is arranged at the driving end of the lower motor, the upper grinding head is opposite to the lower grinding head and arranged at an interval, a first positioning block and a second positioning block are respectively slidably arranged on both sides of the grinding frame, a fifth cylinder is arranged on the first positioning block, a third pressure block is arranged on the driving end of the fifth cylinder, a sixth cylinder is arranged on the second positioning block, a fourth pressure block is arranged at the driving end of the sixth cylinder, and the grinding table is located on the moving path of the third pressure block and the fourth pressure block.

[0007] Optionally, a third motor is provided on the grinding frame, a second screw rod is provided at the driving end of the third motor, and the grinding table is slidably provided on the second screw rod.

[0008] Optionally, a first guide rail and a second guide rail are respectively provided on both sides of the grinding frame, and the grinding table is slidably provided on the first guide rail and the second guide rail.

[0009] Optionally, the grinding table is provided with a first avoidance groove and a second avoidance groove, the first avoidance groove is provided with a first avoidance rail, the second avoidance groove is provided with a second avoidance rail, and the first positioning block is slidably provided on the first avoidance rail and the second avoidance rail.

[0010] Further, the grinding table includes a first extension portion and a second extension portion, the first avoidance rail and the second avoidance rail extend to the first extension portion, a thirteenth cylinder is disposed on the first extension portion, and a driving end of the thirteenth cylinder is connected to the first positioning block.

[0011] Furthermore, the grinding table is provided with a third avoidance groove and a fourth avoidance groove, the third avoidance groove is provided with a third avoidance rail, the fourth avoidance groove is provided with a fourth avoidance rail, and the third avoidance rail and the fourth avoidance rail both extend to the second extension portion.

[0012] Furthermore, a fourteenth cylinder is disposed on the second extension portion, the second positioning block is disposed at a driving end of the fourteenth cylinder, and the second positioning block is slidably disposed on the third avoidance rail and the fourth avoidance rail.

[0013] Optionally, a stretching mechanism is provided on the grinding frame, and the stretching mechanism and the grinding table are respectively located on both sides of the lower grinding head, and the stretching mechanism includes a fifteenth cylinder, a hook and a suspension plate, the hook is arranged at the driving end of the fifteenth cylinder, the fifteenth cylinder is arranged at the bottom of the suspension plate, and the suspension plate is arranged on the grinding frame.

[0014] Furthermore, a push plate is provided at the driving end of the fifteenth cylinder, and the push plate is slidably arranged on the bottom of the suspension plate through a slider and a slide rail. A rotating shaft is provided on the push plate, and the hook is movably arranged on the rotating shaft. A rounded corner is provided at the bottom of the hook, and the rounded corner is close to the upper grinding head.

[0015] Optionally, a third screw rod is rotatably arranged on the grinding frame, a handle is arranged on the top end of the third screw rod, a slide plate is slidably arranged on the third screw rod, a scale is arranged on the grinding frame, a pointer is arranged on the slide plate, the pointer points to the scale on the scale, a sixteenth cylinder is arranged on the slide plate, a bottom block is arranged at the driving end of the sixteenth cylinder, and the upper motor is slidably arranged on the bottom block.

[0016] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0017] The utility model discloses a flange grinding device. As the upper grinding head and the lower grinding head cooperate for grinding, the welding slag at the gap on the flange is located between the upper grinding head and the lower grinding head. The upper grinding head and the lower grinding head both press against the welding slag on the upper and lower surfaces of the flange. The upper grinding head and the lower grinding head are rotated to grind the welding slag on the two surfaces of the flange, thereby improving the production efficiency. Therefore, the problem of double-sided grinding of welding slag at the gap of the flange is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0019] Figure 1 It is a three-dimensional view of a flange grinding device according to a preferred embodiment of the utility model;

[0020] Figure 2 yes Figure 1 Right side view shown;

[0021] Figure 3 yes Figure 1 Rear view shown;

[0022] Figure 4 is a bottom view of the stretching mechanism;

[0023] Figure 5 yes Figure 1 The front view shown;

[0024] Figure 6 yes Figure 2 The top view shown;

[0025] Figure 7 This is an enlarged view of the flange.

[0026] The reference numerals are described as follows:

[0027] 8. Flange; 10. Gap; 41. Upper grinding head; 42. Lower grinding head; 43. Grinding table; 44. Grinding frame; 45. Third motor; 46. Second screw rod; 47. Welding seam avoidance groove; 48. Roller; 70. Stretching mechanism; 103. Third screw rod; 104. Handle; 105. Slide plate; 106. Scale; 107. Pointer; 108. Bottom block; 116. Sixteenth cylinder; 411. Upper motor; 422. Lower motor; 431. First positioning block; 432. Second positioning block; 433. Third pressing block; 434. Fourth pressing block; 435. Fifth cylinder; 436. Sixth cylinder; 441. First guide rail; 442, second guide rail; 443, first support portion; 444, second support portion; 445, first inclined surface; 446, second inclined surface; 451, first extension portion; 452, second extension portion; 461, first avoidance groove; 462, second avoidance groove; 463, third avoidance groove; 464, fourth avoidance groove; 471, first avoidance rail; 472, second avoidance rail; 473, third avoidance rail; 474, fourth avoidance rail; 481, thirteenth cylinder; 482, fourteenth cylinder; 701, fifteenth cylinder; 702, hook; 703, suspension plate; 704, push plate; 705, rotating shaft; 706, rounded corner. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] like Figure 1 and Figure 2 and Figure 3 As shown, it includes a grinding frame 44, on which a grinding table 43 is slidably arranged, an upper motor 411 and a lower motor 422 are arranged on the grinding frame 44 at intervals, the upper motor 411 is located in the vertical direction of the lower motor 422, the upper motor 411 is movably arranged on the grinding frame 44, and the distance between the upper motor 411 and the lower motor 422 is adjustable.

[0032] The driving end of the upper motor 411 is provided with an upper grinding head 41, and the driving end of the lower motor 422 is provided with a lower grinding head 42. The upper grinding head 41 and the lower grinding head 42 are opposite to each other and are arranged at a distance from each other. The flange is placed on the grinding table 43, and the welding position or welding slag position on the flange is located at the outer edge of the flange. The surface of the grinding table 43 is flush with the top of the lower grinding head 42. When the flange is placed on the grinding table 43, when the welding position or welding slag position on the flange moves under the movement of the grinding table 43, the welding position or welding slag position is between the upper grinding head 41 and the lower grinding head 42, and the lower grinding head 42 abuts the bottom of the welding position or welding slag position. According to the thickness of the flange 8, the upper motor 411 is adjusted to achieve the upper grinding head 41 abutting the top of the welding position or welding slag position.

[0033] A first positioning block 431 and a second positioning block 432 are slidingly provided on both sides of the grinding frame 44, and the first positioning block 431 is arranged opposite to the second positioning block 432. A fifth cylinder 435 is arranged on the first positioning block 431, and a third pressure block 433 is arranged on the driving end of the fifth cylinder 435. A sixth cylinder 436 is arranged on the second positioning block 432, and a fourth pressure block 434 is arranged on the driving end of the sixth cylinder 436. The grinding table 43 is located on the moving path of the third pressure block 433 and the fourth pressure block 434. When the flange 8 is placed on the grinding table 43, the flange is pressed together by the third pressure block 433 and the fourth pressure block 434. In this way, when the upper grinding head 41 and the lower grinding head 42 grind the welding position or the welding slag position from the upper and lower surfaces, the flange 8 is fixed and will not be displaced due to vibration.

[0034] The grinding mechanism 4 also includes a grinding frame 44, on which a third motor 45 is provided, and a second screw rod 46 is provided at the driving end of the third motor 45. The grinding table 43 is slidably provided on the second screw rod 46. Driven by the third motor 45, the grinding table 43 moves on the second screw rod 46, and the grinding table 43 approaches or moves away from the third motor 45. A first guide rail 441 and a second guide rail 442 are respectively provided on both sides of the grinding frame 44. The grinding table 43 is slidably provided on the first guide rail 441 and the second guide rail 442 to ensure the stability of the grinding table 43. The first guide rail 441 and the second guide rail 442 are both provided with protective covers, and the second screw rod 46 is also provided with a protective cover. The third motor 45 is connected to the PLC controller signal.

[0035] The grinding table 43 is provided with a first positioning block 431 and a second positioning block 432 relatively, and the first positioning block 431 and the second positioning block 432 can be relatively close to or far away from each other. The first positioning block 431 is provided with a fifth cylinder 435, and a third pressing block 433 is provided on the driving end of the fifth cylinder 435. The second positioning block 432 is provided with a sixth cylinder 436, and a fourth pressing block 434 is provided on the driving end of the sixth cylinder 436. The grinding table 43 is located on the moving path of the third pressing block 433 and the fourth pressing block 434, that is, the flange 8 is placed on the grinding table 43. Then the third motor 45 drives the grinding table 43 to move to the set position, and under the drive of the fifth cylinder 435 and the sixth cylinder 436 respectively, the third pressure block 433 and the fourth pressure block 434 respectively press the two sides of the flange 8, and the welded gap 10 is located between the upper grinding head 41 and the lower grinding head 42. When the flange 8 moves, the welded gap 10 has welding slag, and the upper grinding head 41 and the lower grinding head 42 grind the weld on the gap 10, that is, the gap 10 is grinded while moving, and the fifth cylinder 435 and the sixth cylinder 436 are both connected to the PLC controller signal.

[0036] An upper motor 411 and a lower motor 422 are provided on the grinding frame 44, the driving end of the upper motor 411 is connected to the upper grinding head 41, and the driving end of the lower motor 422 is connected to the lower grinding head 42. The upper motor 411 and the lower motor 422 are both connected to the PLC controller signal, the upper motor 411 drives the upper grinding head 41 to rotate, and the lower motor 422 drives the lower grinding head 42 to rotate. There is welding slag left on the gap 10 after welding, and the welding slag on the upper and lower surfaces of the gap 10 are rotated and ground by the upper grinding head 41 and the lower grinding head 42 respectively. Because the welding slag left by the welding is around the gap 10, the remaining welding slag is close to a straight line, so that the flange 8 can be ground while moving. According to the length of the gap 10, the progress time of the flange 8 and the grinding time of the upper grinding head 41 and the lower grinding head 42 are set. The progress time of the flange 8 refers to the speed at which the third motor 45 drives the second screw rod 46 and the grinding table 43 moves, that is, the speed at which the gap 10 passes between the upper grinding head 41 and the lower grinding head 42.

[0037] The grinding table 43 includes a first extension portion 451 and a second extension portion 452. The first extension portion 451 is provided with a thirteenth cylinder 481, and the second extension portion 452 is provided with a fourteenth cylinder 482. The driving end of the thirteenth cylinder 481 is arranged opposite to the driving end of the fourteenth cylinder 482. The grinding table 43 is provided with a first avoidance groove 461 and a second avoidance groove 462. The first avoidance groove 461 and the second avoidance groove 462 are arranged in parallel. The first avoidance groove 461 is provided with a first avoidance rail 471, and the second avoidance groove 462 is provided with a first avoidance rail 472. A second avoidance rail 472 is provided, and the first avoidance rail 471 and the second avoidance rail 472 both extend to the first extension portion 451. The first positioning block 431 is slidably arranged on the first avoidance rail 471 and the second avoidance rail 472 through a slide rail. The upper surfaces of the first avoidance rail 471 and the second avoidance rail 472 are both lower than the surface of the grinding table 43, so that the first avoidance rail 471 and the second avoidance rail 472 do not contact the flange 8. When the flange 8 moves, the first avoidance rail 471 and the second avoidance rail 472 are prevented from rubbing against the flange 8.

[0038] The driving end of the thirteenth cylinder 481 is connected to the first positioning block 431, and the driving end of the fourteenth cylinder 482 is connected to the second positioning block 432. The grinding table 43 is also provided with a third avoidance groove 463 and a fourth avoidance groove 464. The third avoidance rail 473 is provided in the third avoidance groove 463, and the fourth avoidance rail 474 is provided in the fourth avoidance groove 464. The third avoidance rail 473 and the fourth avoidance rail 474 both extend to the second extension portion 452. The fourteenth cylinder 482 drives the second positioning block 432 to move on the third avoidance rail 473 and the fourth avoidance rail 474. The third avoidance rail 473 and the fourth avoidance rail 474 are arranged in parallel, and the third avoidance rail 473 and the fourth avoidance rail 474 are both lower than the surface of the grinding table 43. The third avoidance rail 473 and the fourth avoidance rail 474 avoid contact with the flange 8. The thirteenth cylinder 481 and the fourteenth cylinder 482 are both connected to the PLC controller signal.

[0039] A weld avoidance groove 47 is arranged on the grinding table 43. The grinding table 43 also has a first support portion 443 and a second support portion 444. The first support portion 443 and the second support portion 444 are arranged at an interval. The gap 10 after welding is located between the first support portion 443 and the second support portion 444. The lower grinding head 422 is located between the first support portion 443 and the second support portion 444. The first support portion 443 and the second support portion 444 respectively support the two sides of the gap 10 after welding, that is, the first support portion 443 and the second support portion 444 are both used to support the flange 10. The weld avoidance groove 47 extends to the outer edges of both ends of the grinding table 43.

[0040] The weld avoidance groove 47 is located in the middle of the grinding table 43. When the robot arm 1 adsorbs the flange 8 onto the grinding table 43 through the first electromagnet 51 and the second electromagnet 52, there is welding slag on the gap 10 after welding. If the welding slag accumulates too much, the excessive welding slag is located in the weld avoidance groove 47, so that the flange 8 can be kept flat on the grinding table 43. If the gap 10 is too long, the welding slag is located in the weld avoidance groove 47. At this time, neither the lower grinding head 422 nor the upper grinding head 42 can grind the remaining welding slag. Manual assistance is used to move the flange 8 forward and the grinding table 43 retreats. The grinding table 43 moves so that the remaining welding slag is ground by the upper grinding head 41 and the lower grinding head 422.

[0041] After grinding is completed, a stretching mechanism 70 is set up. The stretching mechanism 70 includes a fifteenth cylinder 701 and a hook 702. The hook 702 is set at the driving end of the fifteenth cylinder 701. The fifteenth cylinder 701 is connected to the PLC controller signal. The fifteenth cylinder 701 drives the hook 702 to move. The hook 702 pulls the flange 8 to move a set distance, so that the ground flange enters the next process. The stretching mechanism 70 is set on the grinding frame 44.

[0042] like Figure 4As shown, the fifteenth cylinder 701 is arranged at the bottom of the hanging plate 703, the hanging plate 703 is arranged on the grinding frame 44, the driving end of the fifteenth cylinder 701 is provided with a push plate 704, the push plate 704 is slidably arranged at the bottom of the hanging plate 703 through the slider and the slide rail, the push plate 704 is provided with a rotating shaft 705, the hook 702 is arranged on the rotating shaft 705, the fifteenth cylinder 701 is connected to the PLC controller signal, the fifteenth cylinder 701 drives the push plate 704 to move, and the push plate 70 4 moves toward the flange 8, so the hook 702 touches the flange 8 first, then the hook 702 and the rotating shaft 705 rotate a certain angle, the hook 702 is in contact with the flange 8, and when the hook 702 falls and is pulled to the center of the flange 8, the hook 702 and the rotating shaft 705 are reset, that is, the hook 702 and the rotating shaft 705 can only rotate back in one direction under the action of external force, and when the hook 702 and the rotating shaft 705 are not subjected to external force, the hook 702 and the rotating shaft 705 are reset.

[0043] Then the fifteenth cylinder 701 drives the hook 702 and the rotating shaft 705 to reset, and at the same time the hook 702 pulls out the flange 8, so that the polished flange 8 leaves the polishing mechanism 4. In order to reduce the friction between the hook 702 and the flange 8, a rounded corner 706 is provided at the bottom of the hook 702, and the rounded corner 706 is close to the flange 8. When the hook 702 contacts the flange 8, the rounded corner 706 contacts the flange 8 first, so that the surface of the flange 8 is not easily scratched. The number of hooks 702 is set according to needs.

[0044] like Figure 5 and Figure 6 As shown, a plurality of rollers 48 are arranged on the grinding frame 44, and the plurality of rollers 48 are connected to the first supporting portion 443 and the second supporting portion 444. When the hook 702 connects the flange 8, the flange 8 moves from the grinding table 43, and then the flange 8 enters into the plurality of rollers 48 from the first supporting portion 443 and the second supporting portion 444, and the flange 8 moves away from the plurality of rollers 48. The first supporting portion 443 has a first inclined surface 445, and the second supporting portion 444 has a second inclined surface 446. Both the first inclined surface 445 and the second inclined surface 446 are aligned with the rollers 48, so that when the grinding table 43 is moved, the first supporting portion 443 and the second supporting portion 444 can be closer to the rollers 48, and the first inclined surface 445 and the second inclined surface 446 have the function of avoiding space.

[0045] A third screw rod 103 is rotatably arranged on the grinding frame 44, a handle 104 is arranged on the top of the third screw rod 103, a slide plate 105 is slidably arranged on the third screw rod 103, the handle 104 is manually rotated, the third screw rod 103 rotates, and the slide plate 105 can rise or fall. In order to keep the slide plate 105 stable, the slide plate 105 is arranged on the grinding frame 44 through a slider and a slide rail, a scale 106 is arranged on the grinding frame 44, and a pointer 107 is arranged on the slide plate 105. The moving range of the pointer 107 is within the scale range of the scale 106, and the pointer 107 points to the scale on the scale 106.

[0046] Furthermore, a sixteenth cylinder 116 is provided on the slide plate 105, a bottom block 108 is provided at the driving end of the sixteenth cylinder 116, an upper motor 411 is slidably provided on the bottom block 108, the bottom block 108 is provided on the slide plate 105 through a slider and a slide rail, the sixteenth cylinder 116 is connected to the PLC controller signal, and the height of the upper grinding head 42 is adjusted according to the thickness of the flange 8.

[0047] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A flange grinding device, comprising a grinding frame (44), on which a grinding table (43) is slidably arranged, characterized in that: An upper motor (411) and a lower motor (422) are arranged on the grinding frame (44) at a distance from each other. The upper motor (411) is movably arranged on the grinding frame (44). The upper motor (411) is located in the vertical direction of the lower motor (422). An upper grinding head (41) is arranged at the driving end of the upper motor (411). A lower grinding head (42) is arranged at the driving end of the lower motor (422). The upper grinding head (41) and the lower grinding head (42) are arranged opposite to each other and at a distance from each other. A first positioning block (431) and a second positioning block (432) are slidingly arranged, a fifth cylinder (435) is arranged on the first positioning block (431), a third pressing block (433) is arranged on the driving end of the fifth cylinder (435), a sixth cylinder (436) is arranged on the second positioning block (432), a fourth pressing block (434) is arranged on the driving end of the sixth cylinder (436), and the grinding table (43) is located on the moving path of the third pressing block (433) and the fourth pressing block (434).

2. The flange grinding device according to claim 1, characterized in that: The grinding frame (44) is provided with a third motor (45), a driving end of the third motor (45) is provided with a second screw rod (46), and the grinding table (43) is slidably provided on the second screw rod (46).

3. The flange grinding device according to claim 1, characterized in that: A first guide rail (441) and a second guide rail (442) are respectively arranged on both sides of the grinding frame (44), and the grinding table (43) is slidably arranged on the first guide rail (441) and the second guide rail (442).

4. The flange grinding device according to claim 1, characterized in that: The grinding table (43) is provided with a first avoidance groove (461) and a second avoidance groove (462); a first avoidance rail (471) is provided in the first avoidance groove (461); a second avoidance rail (472) is provided in the second avoidance groove (462); and the first positioning block (431) is slidably provided on the first avoidance rail (471) and the second avoidance rail (472).

5. The flange grinding device according to claim 4, characterized in that: The grinding table (43) comprises a first extension portion (451) and a second extension portion (452); the first avoidance rail (471) and the second avoidance rail (472) extend to the first extension portion (451); a thirteenth cylinder (481) is provided on the first extension portion (451); a driving end of the thirteenth cylinder (481) is connected to the first positioning block (431).

6. The flange grinding device according to claim 5, characterized in that: The grinding table (43) is provided with a third avoidance groove (463) and a fourth avoidance groove (464); a third avoidance rail (473) is provided in the third avoidance groove (463); a fourth avoidance rail (474) is provided in the fourth avoidance groove (464); and both the third avoidance rail (473) and the fourth avoidance rail (474) extend to the second extension portion (452).

7. The flange grinding device according to claim 6, characterized in that: A fourteenth cylinder (482) is arranged on the second extension portion (452), the second positioning block (432) is arranged at the driving end of the fourteenth cylinder (482), and the second positioning block (432) is slidably arranged on the third avoidance rail (473) and the fourth avoidance rail (474).

8. The flange grinding device according to claim 1, characterized in that: A stretching mechanism (70) is arranged on the grinding frame (44); the stretching mechanism (70) and the grinding table (43) are respectively located on both sides of the lower grinding head (42); the stretching mechanism (70) comprises a fifteenth cylinder (701), a hook (702) and a suspension plate (703); the hook (702) is arranged at the driving end of the fifteenth cylinder (701); the fifteenth cylinder (701) is arranged at the bottom of the suspension plate (703); and the suspension plate (703) is arranged on the grinding frame (44).

9. The flange grinding device according to claim 8, characterized in that: The driving end of the fifteenth cylinder (701) is provided with a push plate (704), and the push plate (704) is slidably arranged at the bottom of the suspension plate (703) through a slider and a slide rail. A rotating shaft (705) is arranged on the push plate (704), and the hook (702) is movably arranged on the rotating shaft (705). A rounded corner (706) is arranged at the bottom of the hook (702), and the rounded corner (706) is close to the upper grinding head (41).

10. The flange grinding device according to claim 1, characterized in that: A third screw rod (103) is rotatably arranged on the grinding frame (44), a handle (104) is arranged at the top end of the third screw rod (103), a slide plate (105) is slidably arranged on the third screw rod (103), a scale (106) is arranged on the grinding frame (44), a pointer (107) is arranged on the slide plate (105), the pointer (107) points to the scale on the scale (106), a sixteenth cylinder (116) is arranged on the slide plate (105), a bottom block (108) is arranged at the driving end of the sixteenth cylinder (116), and the upper motor (411) is slidably arranged on the bottom block (108).

Images