A polishing machine tool for polishing the surface of a casting

Abstract

The present invention relates to the technical field of polishing machine tools, and discloses a polishing machine tool for polishing the surface of a casting, wherein a conveyor is fixedly connected inside the fixed table, a polishing push mechanism is arranged in the middle of the top of the fixed table, a clamping mechanism is arranged on the top of the conveyor, a limiting mechanism is fixedly connected to the left side of the front of the conveyor, and the polishing push mechanism includes a polishing assembly and a push assembly, and the polishing assembly is arranged on the top of the fixed table. The hydraulic cylinder is turned on to drive the polisher to move downward, so that the bottom of the polisher and the top of the casting contact each other, the polisher is turned on to enable the polisher to polish the surface of the casting, and when the polisher needs to be moved, the first motor is turned on to enable the first motor to drive the third threaded block to move through the first threaded rod, so that the third threaded block drives the hollow cylinder to move, so that the hollow cylinder can drive the polisher to move forward and backward through the hydraulic cylinder, so that the polisher can polish the top of the casting forward and backward.

Description

Technical Field

[0001] The invention relates to the technical field of polishing machine tools, in particular to a polishing machine tool for polishing the surface of a casting. Background Art

[0002] Casting is a manufacturing process that injects liquid metal into a pre-prepared mold, waits for it to cool and solidify, and then obtains an object with a certain shape, size and performance. Castings can be made of metal materials, such as cast steel, cast iron, etc., or ceramics, sand molds, and castings are widely used. Almost all metal products can be produced by casting. Such as cars, airplanes, home appliances, tools, and mechanical equipment. The shape and size of castings can be designed according to needs, and the products produced are of stable quality and excellent performance.

[0003] A polishing machine for polishing and discharging the surface of a casting with announcement number CN 216327480 U can realize reciprocating movement of a cross-shaped slider through the movement of a connecting rod, reciprocating movement of a moving plate through the movement of a cross-shaped slider, reciprocating movement of a polishing machine through the movement of a moving plate, and reciprocating movement of a polishing machine through the reciprocating movement of a polishing machine. The surface of the casting can be polished better through the reciprocating movement of the polishing machine, which can solve the problem in the prior art that excess material will appear at the feed inlet after the casting is formed, and the excess material will affect the use of the casting, so the excess material needs to be removed, and the problem that removing the excess material will cause an uneven incision.

[0004] The casting surface is polished and discharged by a polishing machine. The casting to be polished is placed on the top of a base plate. After the casting is clamped by a first clamping block and a second clamping block, the casting can be polished by a polishing machine. However, after the device clamps the casting, there is no device for adjusting the position of the casting inside. When the casting is large in size and the polishing machine can only polish a small area on the top of the casting, the staff is required to manually adjust the position of the casting, which affects the work efficiency. Therefore, improvement is needed. Summary of the invention

[0005] The object of the present invention is to provide a polishing machine tool for polishing the surface of a casting to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a polishing machine for polishing the surface of a casting, comprising a fixed table, a conveyor is fixedly connected inside the fixed table, a polishing pushing mechanism is arranged in the middle of the top of the fixed table, a clamping mechanism is arranged on the top of the conveyor, and a limiting mechanism is fixedly connected to the left side of the front of the conveyor;

[0007] The polishing pushing mechanism comprises a polishing component and a pushing component, wherein the polishing component is arranged on the top of the fixed platform, and the pushing component is arranged on the bottom of the fixed platform;

[0008] The polishing assembly includes a support frame, the support frame is fixedly connected to the top of the fixed platform, the front of the support frame is fixedly connected to a first motor, the back end of the first motor is fixedly connected to a first threaded rod, the back end of the first threaded rod is rotatably connected to the inner back end of the support frame, the outer periphery of the first threaded rod is threadedly connected to a third threaded block, the bottom of the third threaded block is fixedly connected to a hollow cylinder, the bottom of the hollow cylinder is fixedly connected to a hydraulic cylinder, the bottom of the hydraulic cylinder is fixedly connected to a fixed plate, the bottom of the fixed plate is fixedly connected to a polishing machine, and the front and rear sides of the hollow cylinder are fixedly connected to push plates;

[0009] The pushing assembly includes a connecting frame, the connecting frame is fixedly connected to the middle of the bottom of the fixed platform, the top of the connecting frame is rotatably connected to a rotating rod, the top of the rotating rod is rotatably connected to the bottom of the fixed platform, the outer periphery of the rotating rod is fixedly connected to a first gear, the left and right sides of the first gear are meshed with racks, the left side of the rack is fixedly connected to a sliding block, the inside of the sliding block is slidably connected to a connecting rod, the front and rear sides of the connecting rod are fixedly connected to an arc plate, the arc plate is fixedly connected to the bottom of the fixed platform, the outer periphery of the connecting rod is slidably connected to a first spring, the top of the rack is fixedly connected to a support block, and the front side of the rack is fixedly connected to a pushing plate;

[0010] The limiting mechanism includes a fixing frame, the fixing frame is fixedly connected to the left side of the front face of the fixing platform, a second motor is fixedly connected to the front face of the inner side of the fixing frame, a rotating shaft is fixedly connected to the back end of the second motor, the rotating shaft is fixedly connected to the inside of the conveyor, a second gear is fixedly connected to the periphery of the rotating shaft, a limiting block is fixedly connected to the back end of the second gear, the right side of the second gear is engaged with the limiting gear, a slide is fixedly connected to the right side of the limiting gear, a fixing rod is slidably connected to the inside of the slide, the fixing rod is fixedly connected to the inside of the fixing platform, and a second spring is sleeved on the periphery of the fixing rod;

[0011] The clamping mechanism includes a first threaded block, which is fixedly connected to the right side of the top of the conveyor, a short rod is rotatably connected to the inner side of the first threaded block, a second threaded block is fixedly connected to the inner side of the short rod, a pulling plate is fixedly connected to the right side of the top of the second threaded block, a second threaded rod is threadedly connected to the inside of the second threaded block, a rotating disk is fixedly connected to the right side of the second threaded rod, a clamping plate is rotatably connected to the left side of the second threaded rod, a fixed plate is provided on the left side of the clamping plate, the left side of the clamping plate and the right side of the fixed plate are fitted together, and the fixed plate is fixedly connected to the left side of the top of the conveyor.

[0012] According to the above technical solution, a fixing groove corresponding to the movement trajectory of the third threaded block is opened inside the support frame, and the third threaded block is slidably connected inside the fixing groove. The opening of the fixing groove makes the third threaded block more stable during movement.

[0013] According to the above technical solution, the back end of the first spring is fixedly connected to the front of the support block 422, and the front of the first spring is fixedly connected to the back end of the inner side of the arc plate. When the push plate does not push the push plate, the first spring can drive the push plate to return to its original position, so that the push plate can squeeze the slide plate, and the slide plate can drive the limiting gear to limit the second gear.

[0014] According to the above technical solution, a slide groove corresponding to the movement trajectory of the support block is opened at the bottom of the fixed platform, and the support block is slidably connected to the inside of the slide groove. The support block can support the rack, making the rack more stable during movement.

[0015] According to the above technical solution, the left side of the second spring is fixedly connected to the right side of the slide plate, and the right side of the second spring is fixedly connected to the right side inside the fixed platform. When the pushing plate moves away from the front and rear sides of the fixed platform, the second spring can drive the slide plate to move, so that the slide plate can drive the limiting gear away from the second gear, so that the second motor can drive the conveyor to move through the rotating shaft.

[0016] According to the above technical solution, the outer bottom of the second threaded rod is threadedly connected to the first threaded block and the inside of the second threaded block. When the bottom of the first threaded block and the top of the second threaded block contact each other, the second threaded rod is rotated by external force, which can drive the clamping plate to move, so that the clamping plate can clamp the casting.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0018] The polishing machine for polishing the surface of a casting has a polishing pushing mechanism. When it is necessary to polish the surface of the casting, the hydraulic cylinder is turned on to drive the polishing machine to move downward so that the bottom of the polishing machine contacts the top of the casting. The polishing machine is turned on to enable the polishing machine to polish the surface of the casting. When it is necessary to move the polishing machine, the first motor is turned on to drive the third threaded block to move through the first threaded rod, so that the third threaded block drives the hollow cylinder to move, so that the hollow cylinder can drive the polishing machine to move forward and backward through the hydraulic cylinder, so that the polishing machine can polish the top of the casting forward and backward. When the hollow cylinder moves forward and backward, it drives the push plate to move forward and backward, so that the push plate can push the push plate, so that the push plate drives the rack to move, so that the rack drives the first gear to rotate, and when the rack moves, it can drive the sliding block to move, so that the sliding block can squeeze the first spring, so that the push plate is away from the front and back sides of the fixed platform.

[0019] The polishing machine for polishing the surface of a casting has a limiting mechanism. When the push plate is away from the front and rear sides of the fixed platform, the second spring can drive the slide plate to move, so that the slide plate can drive the limiting gear away from the second gear, so that the second motor can drive the conveyor to move through the rotating shaft, so that the casting fixed on the top of the conveyor can move; when the push plate does not push the push plate, the first spring can drive the push plate to return to its original position, so that the push plate can squeeze the slide plate, so that the slide plate can drive the limiting gear to limit the second gear, so that the second motor cannot drive the conveyor to move through the rotating shaft, so that the casting stops after moving an end distance, and the polishing machine can polish different positions of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a three-dimensional diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the polishing driving mechanism structure;

[0023] Figure 3 is a schematic diagram of the polishing component structure;

[0024] Figure 4 To promote the schematic diagram of the component structure;

[0025] Figure 5 It is a schematic diagram of the limit mechanism structure;

[0026] Figure 6 It is a schematic diagram of the clamping mechanism structure;

[0027] Figure 7 It is a schematic diagram of the structure of the second threaded block and the short rod;

[0028] Figure 8 for Figure 5 Enlarged structural diagram at A in the middle.

[0029] In the figure: 1, conveyor; 2, clamping mechanism; 21, rotating disk; 22, second threaded block; 23, first threaded block; 24, second threaded rod; 25, clamping plate; 26, fixed plate; 27, short rod; 28, pull plate; 3, fixed table; 4, polishing push mechanism; 41, polishing assembly; 411, first motor; 412, third threaded block; 413, hydraulic cylinder; 414, hollow cylinder; 415, push plate; 416, first threaded rod; 417, polishing machine; 418, fixed disk; 4 19. Support frame; 42. Pushing assembly; 421. Pushing plate; 422. Supporting block; 423. Rack; 424. Connecting frame; 425. Rotating rod; 426. First gear; 427. First spring; 428. Connecting rod; 429. Sliding block; 4291. Arc plate; 5. Limiting mechanism; 51. Slide plate; 52. Limiting gear; 53. Rotating shaft; 54. Second motor; 55. Second gear; 56. Fixed frame; 57. Limiting block; 58. Fixed rod; 59. Second spring. DETAILED DESCRIPTION

[0030] 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.

[0031] The present invention provides the following technical solutions: Example 1

[0032] Please combine Figure 1-8 A polishing machine for polishing the surface of a casting, comprising a fixed table 3, a conveyor 1 is fixedly connected inside the fixed table 3, a polishing pushing mechanism 4 is arranged in the middle of the top of the fixed table 3, a clamping mechanism 2 is arranged on the top of the conveyor 1, and a limiting mechanism 5 is fixedly connected to the left side of the front of the conveyor 1;

[0033] The polishing pushing mechanism 4 includes a polishing component 41 and a pushing component 42. The polishing component 41 is arranged on the top of the fixed platform 3, and the pushing component 42 is arranged on the bottom of the fixed platform 3.

[0034] The polishing assembly 41 includes a support frame 419, which is fixedly connected to the top of the fixed table 3. The front of the support frame 419 is fixedly connected to a first motor 411, the back end of the first motor 411 is fixedly connected to a first threaded rod 416, the back end of the first threaded rod 416 is rotatably connected to the inner back end of the support frame 419, the outer periphery of the first threaded rod 416 is threadedly connected to a third threaded block 412, the bottom of the third threaded block 412 is fixedly connected to a hollow cylinder 414, the bottom of the hollow cylinder 414 is fixedly connected to a hydraulic cylinder 413, the bottom of the hydraulic cylinder 413 is fixedly connected to a fixed plate 418, the bottom of the fixed plate 418 is fixedly connected to a polishing machine 417, and the front and rear sides of the hollow cylinder 414 are fixedly connected to push plates 415.

[0035] Furthermore, a fixing groove corresponding to the movement trajectory of the third threaded block 412 is opened inside the support frame 419, and the third threaded block 412 is slidably connected inside the fixing groove. The opening of the fixing groove makes the third threaded block 412 more stable during the movement. Example 2

[0036] See also Figure 1-8 On the basis of the first embodiment, the pushing assembly 42 further comprises a connecting frame 424, the connecting frame 424 is fixedly connected to the middle of the bottom of the fixed platform 3, the top of the connecting frame 424 is rotatably connected to a rotating rod 425, the top of the rotating rod 425 is rotatably connected to the bottom of the fixed platform 3, the outer periphery of the rotating rod 425 is fixedly connected to a first gear 426, the left and right sides of the first gear 426 are meshed with racks 423, the left side of the rack 423 is fixedly connected to a sliding block 429, the sliding block 429 is slidably connected to a connecting rod 428, the front and rear sides of the connecting rod 428 are fixedly connected to an arc plate 4291, the arc plate 4291 is fixedly connected to the bottom of the fixed platform 3, the outer periphery of the connecting rod 428 is slidably connected to a first spring 427, the top of the rack 423 is fixedly connected to a support block 422, and the front side of the rack 423 is fixedly connected to a pushing plate 421.

[0037] Furthermore, the back end of the first spring 427 is fixedly connected to the front side of the support block 422, and the front side of the first spring 427 is fixedly connected to the inner back end of the arc plate 4291. When the push plate 415 does not push the push plate 421, the first spring 427 can drive the push plate 421 to return to its original position, so that the push plate 421 can squeeze the slide plate 51, so that the slide plate 51 can drive the limiting gear 52 to limit the second gear 55.

[0038] Furthermore, a slide groove corresponding to the movement trajectory of the support block 422 is opened at the bottom of the fixed platform 3, and the support block 422 is slidably connected to the inside of the slide groove. The support block 422 can support the rack 423, making the rack 423 more stable during movement. Example 3

[0039] See also Figure 1-8 On the basis of the first embodiment, the limiting mechanism 5 further comprises a fixing frame 56, the fixing frame 56 is fixedly connected to the left front side of the fixing platform 3, a second motor 54 is fixedly connected to the front side of the fixing frame 56, a rotating shaft 53 is fixedly connected to the back end of the second motor 54, the rotating shaft 53 is fixedly connected to the inside of the conveyor 1, a second gear 55 is fixedly connected to the periphery of the rotating shaft 53, a limiting block 57 is fixedly connected to the back end of the second gear 55, the right side of the second gear 55 is meshed with the limiting gear 52, the right side of the limiting gear 52 is fixedly connected to the slide plate 51, a fixing rod 58 is slidably connected to the inside of the slide plate 51, the fixing rod 58 is fixedly connected to the inside of the fixing platform 3, and a second spring 59 is sleeved on the periphery of the fixing rod 58.

[0040] Furthermore, the left side of the second spring 59 is fixedly connected to the right side of the slide plate 51, and the right side of the second spring 59 is fixedly connected to the right side inside the fixed platform 3. When the pushing plate 421 moves away from the front and rear sides of the fixed platform 3, the second spring 59 can drive the slide plate 51 to move, so that the slide plate 51 can drive the limiting gear 52 away from the second gear 55, so that the second motor 54 can drive the conveyor 1 to move through the rotating shaft 53. Example 4

[0041] See also Figure 1-8 On the basis of the first embodiment, the clamping mechanism 2 further comprises a first threaded block 23, the first threaded block 23 is fixedly connected to the top right side of the conveyor 1, a short rod 27 is rotatably connected to the inner side of the first threaded block 23, a second threaded block 22 is fixedly connected to the inner side of the short rod 27, a pull plate 28 is fixedly connected to the top right side of the second threaded block 22, a second threaded rod 24 is threadedly connected to the inner side of the second threaded block 22, a rotating disk 21 is fixedly connected to the right side of the second threaded rod 24, a clamping plate 25 is rotatably connected to the left side of the second threaded rod 24, a fixing plate 26 is arranged on the left side of the clamping plate 25, the left side of the clamping plate 25 and the right side of the fixing plate 26 are fitted together, and the fixing plate 26 is fixedly connected to the top left side of the conveyor 1.

[0042] Furthermore, the outer bottom of the second threaded rod 24 is threadedly connected to the first threaded block 23 and the second threaded block 22. When the bottom of the first threaded block 23 and the top of the second threaded block 22 contact each other, the second threaded rod 24 is rotated by an external force, which can drive the clamping plate 25 to move, so that the clamping plate 25 can clamp the casting.

[0043] In actual operation, when the device is used, when it is necessary to clamp the casting, the casting is placed on the top of the conveyor 1, and the pull plate 28 is pressed to rotate the second threaded block 22 through the short rod 27, pushing the second threaded rod 24, so that the second threaded rod 24 can drive the clamping plate 25 to move a long distance. After the second threaded rod 24 moves a long distance, the second threaded block 22 is rotated so that the outer periphery of the second threaded rod 24 can be threadedly connected with the second threaded block 22 and the first threaded block 23. When it is necessary to fine-tune the position of the clamping plate 25, the second threaded rod 24 is driven to rotate by the rotating disk 21, so that the second threaded rod 24 can drive the clamping plate 25 to move, so that the clamping plate 25 can clamp the casting;

[0044] When the surface of the casting needs to be polished, the hydraulic cylinder 413 is turned on, so that the hydraulic cylinder 413 drives the polishing machine 417 to move downward, so that the bottom of the polishing machine 417 contacts the top of the casting, and the polishing machine 417 is turned on so that the polishing machine 417 can polish the surface of the casting. When the polishing machine 417 needs to be moved, the first motor 411 is turned on, so that the first motor 411 drives the third threaded block 412 to move through the first threaded rod 416, so that the third threaded block 412 drives the hollow cylinder 414 to move, so that the hollow cylinder 414 can pass through the hydraulic cylinder 413 drives the polishing machine 417 to move forward and backward, so that the polishing machine 417 can polish the top of the casting forward and backward. When the hollow cylinder 414 moves forward and backward, it drives the push plate 415 to move forward and backward, so that the push plate 415 can push the push plate 421, so that the push plate 421 drives the rack 423 to move, so that the rack 423 drives the first gear 426 to rotate. When the rack 423 moves, it can drive the sliding block 429 to move, so that the sliding block 429 can squeeze the first spring 427, so that the pushing plate 421 is away from the front and rear sides of the fixed platform 3;

[0045] When the pushing plate 421 is away from the front and rear sides of the fixed platform 3, the second spring 59 can drive the slide plate 51 to move, so that the slide plate 51 can drive the limiting gear 52 away from the second gear 55, so that the second motor 54 can drive the conveyor 1 to move through the rotating shaft 53, so that the casting fixed on the top of the conveyor 1 can move; when the pushing plate 415 does not push the pushing plate 421, the first spring 427 can drive the pushing plate 421 to return to its original position, so that the pushing plate 421 can squeeze the slide plate 51, so that the slide plate 51 can drive the limiting gear 52 to limit the second gear 55, so that the second motor 54 cannot drive the conveyor 1 to move through the rotating shaft 53, so that the casting stops after moving one end distance, so that the polishing machine 417 can polish different positions of the casting.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A polishing machine for polishing the surface of a casting, comprising a fixed table (3), Features: The fixed platform (3) is fixedly connected to a conveyor (1) inside, a polishing pushing mechanism (4) is arranged in the middle of the top of the fixed platform (3), a clamping mechanism (2) is arranged on the top of the conveyor (1), and a limiting mechanism (5) is fixedly connected to the left side of the front of the conveyor (1); The polishing pushing mechanism (4) comprises a polishing component (41) and a pushing component (42); the polishing component (41) is arranged on the top of the fixed platform (3), and the pushing component (42) is arranged on the bottom of the fixed platform (3); The polishing assembly (41) comprises a support frame (419), wherein the support frame (419) is fixedly connected to the top of the fixed platform (3), the front of the support frame (419) is fixedly connected to a first motor (411), the back end of the first motor (411) is fixedly connected to a first threaded rod (416), the back end of the first threaded rod (416) is rotatably connected to the inner back end of the support frame (419), the outer periphery of the first threaded rod (416) is threadedly connected to a third threaded block (412), the bottom of the third threaded block (412) is fixedly connected to a hollow cylinder (414), the bottom of the hollow cylinder (414) is fixedly connected to a hydraulic cylinder (413), the bottom of the hydraulic cylinder (413) is fixedly connected to a fixed disk (418), the bottom of the fixed disk (418) is fixedly connected to a polishing machine (417), and the front and rear sides of the hollow cylinder (414) are fixedly connected to push plates (415); The pushing assembly (42) comprises a connecting frame (424), the connecting frame (424) being fixedly connected to the middle of the bottom of the fixed platform (3), the top of the connecting frame (424) being rotatably connected to a rotating rod (425), the top of the rotating rod (425) being rotatably connected to the bottom of the fixed platform (3), the outer periphery of the rotating rod (425) being fixedly connected to a first gear (426), the left and right sides of the first gear (426) being meshed with racks (423), the left side of the rack (423) being fixedly connected to connected to a sliding block (429), the sliding block (429) is internally slidably connected to a connecting rod (428), the connecting rod (428) is fixedly connected to arc plates (4291) on both sides, the arc plates (4291) are fixedly connected to the bottom of a fixed platform (3), the connecting rod (428) is slidably connected to a first spring (427) on the periphery, the top of the rack (423) is fixedly connected to a support block (422), and the front of the rack (423) is fixedly connected to a push plate (421); The limiting mechanism (5) comprises a fixing frame (56), the fixing frame (56) being fixedly connected to the left side of the front face of the fixing platform (3), a second motor (54) being fixedly connected to the front face of the inner side of the fixing frame (56), a rotating shaft (53) being fixedly connected to the back end of the second motor (54), the rotating shaft (53) being fixedly connected to the inside of the conveyor (1), a second gear (55) being fixedly connected to the periphery of the rotating shaft (53), a limiting block (57) being fixedly connected to the back end of the second gear (55), the right side of the second gear (55) being meshed with a limiting gear (52), the right side of the limiting gear (52) being fixedly connected to a slide plate (51), a fixing rod (58) being slidably connected to the inside of the sliding plate (51), the fixing rod (58) being fixedly connected to the inside of the fixing platform (3), and a second spring (59) being sleeved to the periphery of the fixing rod (58); The clamping mechanism (2) comprises a first threaded block (23), the first threaded block (23) being fixedly connected to the right side of the top of the conveyor (1), a short rod (27) being rotatably connected inside the first threaded block (23), a second threaded block (22) being fixedly connected inside the short rod (27), a pull plate (28) being fixedly connected to the right side of the top of the second threaded block (22), a second threaded rod (24) being internally threadedly connected to the second threaded block (22), a rotating disk (21) being fixedly connected to the right side of the second threaded rod (24), a clamping plate (25) being rotatably connected to the left side of the second threaded rod (24), a fixed plate (26) being arranged on the left side of the clamping plate (25), the left side of the clamping plate (25) and the right side of the fixed plate (26) being in contact with each other, and the fixed plate (26) being fixedly connected to the left side of the top of the conveyor (1); The back end of the first spring (427) is fixedly connected to the front of the support block (422), and the front of the first spring (427) is fixedly connected to the back end of the inner side of the arc plate (4291); The left side of the second spring (59) is fixedly connected to the right side of the slide plate (51), and the right side of the second spring (59) is fixedly connected to the right side inside the fixed platform (3).

2. A polishing machine for polishing the surface of a casting according to claim 1, Features: A fixing groove corresponding to the movement track of the third threaded block (412) is provided inside the support frame (419), and the third threaded block (412) is slidably connected inside the fixing groove.

3. A polishing machine for polishing the surface of a casting according to claim 2, Features: The inner bottom of the fixed platform (3) is provided with a slide groove corresponding to the movement track of the support block (422), and the support block (422) is slidably connected inside the slide groove.

4. A polishing machine for polishing the surface of a casting according to claim 3, Features: The outer bottom of the second threaded rod (24) is threadedly connected to the inside of the first threaded block (23).

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