Mirror surface steel plate mirror surface polishing equipment

Abstract

The application discloses a mirror surface steel plate mirror polishing equipment and relates to the technical field of polishing equipment. The mirror surface steel plate mirror polishing equipment comprises a polishing box body, a working bearing mechanism, an in-out material conveying mechanism, a sand belt pre-polishing mechanism and a flexible fine polishing mechanism. The sand belt pre-polishing mechanism performs pre-polishing on the surface of the steel plate through pre-polishing sand belts. The flexible fine polishing mechanism drives a floating seat to axially swing slightly through a cam abutting guide seat, and makes the flexible polishing roller perform fine polishing on the surface of the pre-polished steel plate in a rotating state, so that the pre-polishing track of the sand belt and the fine polishing track of the flexible polishing roller form cross coverage, sand belt line residues are reduced, and the polishing uniformity of the surface of the mirror surface steel plate is improved.

Description

Technical Field

[0001] This invention relates to the field of polishing equipment technology, and in particular to a mirror polishing equipment for mirror steel plates. Background Technology

[0002] Mirror-finish steel plates typically undergo processes such as conveying, surface pretreatment, polishing, and cleaning during processing. Existing steel plate polishing equipment often uses abrasive belts, polishing rollers, or polishing wheels to process the surface of the steel plate in order to remove surface textures and improve the smoothness of the steel plate surface.

[0003] When polishing mirror steel plates with existing equipment, single abrasive belt polishing can easily form directional patterns on the steel plate surface that extend along the direction of abrasive belt movement. If the abrasive belt pressure is directly increased to pursue a mirror effect, it can easily cause local indentations, wear debris re-carrying, and secondary scratches on the steel plate surface, affecting the quality of subsequent mirror polishing.

[0004] Therefore, it is necessary to invent a mirror polishing equipment for mirror steel plates to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a mirror polishing device for mirror steel plates to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a mirror polishing equipment for steel plates, comprising a polishing box, a working bearing mechanism, and an infeed and discharge conveying mechanism. The working bearing mechanism is located at the lower part of the polishing box, and the two infeed and discharge conveying mechanisms are respectively located on the infeed side and the discharge side of the working bearing mechanism. A sand belt pre-polishing mechanism and a flexible fine polishing mechanism are sequentially arranged above the working bearing mechanism.

[0007] The pre-polishing mechanism includes a pre-polishing bracket, a drive roller, a driven roller, and a pre-polishing belt. The pre-polishing bracket is fixedly installed inside the polishing box. The drive roller and the driven roller are rotatably disposed at both ends of the pre-polishing bracket, and the pre-polishing belt is wrapped around the outside of the drive roller and the driven roller.

[0008] The flexible fine polishing mechanism includes a fine polishing bracket, a floating seat, a splined shaft, a flexible polishing roller, a guide seat, a cam, and a motor. The fine polishing bracket is ellipsably mounted inside the polishing box and located on the discharge side of the sand belt pre-polishing mechanism. The floating seat is slidably mounted below the fine polishing bracket. The flexible polishing roller is rotatably mounted below the floating seat. The splined shaft is fixed to one end of the flexible polishing roller and rotatably mounted below the fine polishing bracket. The guide seat is located at the end of the floating seat. The motor is located above the fine polishing bracket. The cam is located at the output end of the motor and abuts against the guide seat. The cam presses against the guide seat to drive the floating seat to oscillate slightly axially.

[0009] Preferably, the belt pre-polishing mechanism further includes a drive shaft, which passes through the pre-polishing bracket and is coaxially and fixedly engaged with the drive roller.

[0010] Preferably, the pre-polishing belt mechanism further includes a polishing liquid guide cover and a polishing liquid outlet. The polishing liquid guide cover is fixedly disposed on the outside of the pre-polishing bracket and located on the outside of the pre-polishing belt. The polishing liquid outlet is fixedly disposed at the bottom end of the polishing liquid guide cover.

[0011] Preferably, the longitudinal section of the polishing liquid guide cover has a tapered structure that is wider at the top and narrower at the bottom, the outlet direction of the polishing liquid outlet extends along the tangent direction of the outer peripheral surface of the drive roller, and the outlet direction is consistent with the movement direction of the pre-polishing belt around the drive roller.

[0012] Preferably, the flexible fine polishing mechanism further includes a lifting guide frame, a lifting slide, a lead screw, and a lifting drive shaft. The lifting guide frame is fixedly installed inside the polishing box. The lifting slide is slidably installed inside the lifting guide frame. The lead screw is rotatably installed inside the lifting guide frame. A lead screw groove adapted to the lead screw is opened in the middle of the lifting slide. The lifting drive shaft is installed at the top of the lifting guide frame and is connected to the lead screw for transmission. The fine polishing bracket is fixedly installed on the lifting slide.

[0013] Preferably, the floating seat is provided with a guide sleeve, a guide rod and a fixed seat. The fixed seat is fixedly disposed at the lower part of the fine polishing bracket. The guide rod is fixedly disposed on the inner side of the fixed seat along the axial direction of the flexible polishing roller. The guide sleeve is fixedly disposed on the inner side of the floating seat and sleeved on the outer side of the guide rod.

[0014] Preferably, a return spring is provided between the floating seat and the fixed seat. The return spring is sleeved on the outside of the guide rod, and the two ends of the return spring abut against the floating seat and the fixed seat, respectively.

[0015] Preferably, the flexible fine polishing mechanism further includes a bushing and a fine polishing motor. The bushing is rotatably mounted on the fine polishing bracket and is sleeved on the outside of the spline shaft and engages with the spline of the spline shaft. The fine polishing motor is fixedly mounted on one side of the fine polishing bracket and is in transmission engagement with the bushing.

[0016] Preferably, the flexible polishing mechanism further includes a polishing liquid spray pipe and a liquid blocking and scraping assembly. The polishing liquid spray pipe is fixedly installed on the polishing support and located at the tangent of the flexible polishing roller. Multiple nozzles are fixedly installed in the middle of the polishing liquid spray pipe. The spraying direction of the nozzles is towards the tangent of the outer peripheral surface of the flexible polishing roller. The liquid blocking and scraping assembly is fixedly installed at the lower part of the polishing support and located on the side of the flexible polishing roller close to the working support mechanism.

[0017] Preferably, the working support mechanism includes a support frame, a supporting conveyor belt, a lower support box, and a lifting support component. The supporting conveyor belt is disposed above the support frame and below the sand belt pre-polishing mechanism and the flexible fine polishing mechanism. The lower support box is disposed below the support frame, and the lifting support component is supported between the support frame and the lower support box.

[0018] The technical effects and advantages of this invention are as follows:

[0019] 1. This invention sets up a sanding belt pre-polishing mechanism and a flexible fine polishing mechanism, so that the mirror steel plate is first pre-polished by the pre-polishing sanding belt during the conveying process, and then fine polished by the flexible polishing roller. The cam abuts against the guide seat and drives the floating seat to swing slightly axially, so that the flexible polishing roller forms a reciprocating covering path along the axial direction while rotating for fine polishing. This makes the flexible fine polishing trajectory intersect with the directional texture formed by the pre-polishing sanding belt, reducing sanding belt texture residue and improving the uniformity of the brightness of the mirror steel plate surface.

[0020] 2. By setting up a splined shaft, bushing, and fine polishing motor, the present invention enables the flexible polishing roller to maintain a stable rotational transmission path when it axially swings slightly with the floating seat, avoiding interference between the lateral swinging motion of the flexible polishing roller and the rotational polishing motion, thereby ensuring the continuous contact state of the roller surface during the fine polishing process, which is beneficial to improving the processing consistency when continuously polishing mirror steel plates.

[0021] 3. This invention, by setting up a polishing liquid guide cover, a polishing liquid outlet, a fine polishing liquid spray pipe, and a liquid blocking and scraping assembly, allows the polishing liquid containing abrasive debris generated in the pre-polishing stage to be discharged directionally along the polishing liquid guide cover and the polishing liquid outlet, and allows the fine polishing liquid to enter the fine polishing contact area from the nozzle along the tangent position of the flexible polishing roller, thereby reducing the backflow of coarse abrasive debris to the subsequent fine polishing area, reducing the risk of secondary scratches on the surface of the mirror steel plate, and improving the stability of the fine polishing liquid utilization. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the overall front view of the present invention.

[0024] Figure 3This is a schematic diagram of the working bearing mechanism of the present invention.

[0025] Figure 4 This is a schematic diagram of the internal structure of the polishing box of the present invention.

[0026] Figure 5 This is a schematic diagram of the pre-polishing mechanism for sand belts according to the present invention.

[0027] Figure 6 This is a schematic diagram of the pre-polishing mechanism for abrasive belts from another perspective.

[0028] Figure 7 This is a partial structural diagram of the flexible precision polishing mechanism of the present invention. Figure 1 .

[0029] Figure 8 This is a schematic diagram of the flexible precision polishing mechanism of the present invention. Figure 2 .

[0030] Figure 9 This is a schematic diagram of the flexible precision polishing mechanism of the present invention. Figure 3 .

[0031] Figure 10 This is a schematic diagram of the flexible polishing roller, floating seat, and splined shaft assembly structure of the present invention.

[0032] In the diagram: 1. Polishing box; 2. Working bearing mechanism; 21. Bearing frame; 22. Conveyor belt support; 23. Lower support box; 24. Lifting support component; 3. Sand belt pre-polishing mechanism; 31. Pre-polishing bracket; 32. Drive roller; 321. Drive shaft; 33. Driven roller; 34. Pre-polishing sand belt; 35. Polishing liquid guide cover; 36. Polishing liquid outlet; 4. Flexible fine polishing mechanism; 41. Fine polishing bracket; 411. Lifting guide frame; 412. Lifting slide; 413. Lead screw; 414. Lifting drive shaft; 42. Floating seat; 421. Guide sleeve; 422. Guide rod; 423. Fixed seat; 424. Guide seat; 425. Cam; 426. Motor; 43. Splined shaft; 44. Flexible polishing roller; 45. Bushing; 451. Fine polishing motor; 46. Fine polishing liquid spray pipe; 461. Nozzle; 47. Liquid blocking and scraping assembly; 5. Feeding and discharging conveying mechanism. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] like Figures 1 to 10As shown, the mirror polishing equipment for mirror steel plates provided by the present invention essentially consists of a sand belt pre-polishing mechanism 3 and a flexible fine polishing mechanism 4 sequentially arranged on the same steel plate conveying path, and a floating seat 42 being driven by a cam 425 to oscillate slightly in the axial direction, so that the flexible polishing roller 44 performs cross-coverage fine polishing on the surface of the pre-polished steel plate.

[0035] In terms of specific structural installation, the structural body can be constructed according to the inventive concept of this embodiment. In this embodiment, no special limitations are imposed.

[0036] In this embodiment, a mirror polishing equipment for a mirror steel plate includes a polishing box 1, a working bearing mechanism 2, and an infeed and outfeed conveying mechanism 5. The working bearing mechanism 2 is located at the lower part of the polishing box 1, and the two infeed and outfeed conveying mechanisms 5 are respectively located on the infeed side and the outfeed side of the working bearing mechanism 2, so that the mirror steel plate can enter the working bearing mechanism 2 from the infeed side and be output from the outfeed side after polishing is completed.

[0037] The working support mechanism 2 includes a support frame 21, a support conveyor belt 22, a lower support box 23, and a lifting support component 24. The support conveyor belt 22 is located above the support frame 21 and below the sand belt pre-polishing mechanism 3 and the flexible fine polishing mechanism 4. The lower support box 23 is located below the support frame 21. The lifting support component 24 is supported between the support frame 21 and the lower support box 23, so that the support conveyor belt 22 can support the lower side of the steel plate during the steel plate polishing process.

[0038] The sanding belt pre-polishing mechanism 3 is located above the working bearing mechanism 2. The sanding belt pre-polishing mechanism 3 includes a pre-polishing bracket 31, a drive roller 32, a driven roller 33, and a pre-polishing sanding belt 34. The pre-polishing bracket 31 is fixedly installed inside the polishing box 1. The drive roller 32 and the driven roller 33 are rotatably located at both ends of the pre-polishing bracket 31. The pre-polishing sanding belt 34 is wrapped around the outside of the drive roller 32 and the driven roller 33, so that the drive roller 32 and the driven roller 33 can jointly support the pre-polishing sanding belt 34 to form a circular motion path.

[0039] The pre-polishing belt mechanism 3 also includes a drive shaft 321, which passes through the pre-polishing bracket 31 and is coaxially fixed with the drive roller 32, so that external power can drive the drive roller 32 to rotate through the drive shaft 321, and the drive roller 32 drives the pre-polishing belt 34 to circulate around the drive roller 32 and the driven roller 33.

[0040] The belt pre-polishing mechanism 3 also includes a polishing liquid guide cover 35 and a polishing liquid outlet 36. The polishing liquid guide cover 35 is fixedly installed on the outside of the pre-polishing bracket 31 and is located on the outside of the pre-polishing belt 34. The polishing liquid outlet 36 is fixedly installed at the bottom end of the polishing liquid guide cover 35, so that the polishing liquid and abrasive debris generated when the pre-polishing belt 34 is working can be restricted by the polishing liquid guide cover 35 and discharged through the polishing liquid outlet 36.

[0041] In this embodiment, the longitudinal section of the polishing slurry guide cover 35 has a tapered structure that is wider at the top and narrower at the bottom. The outlet direction of the polishing slurry outlet 36 extends along the tangent direction of the outer peripheral surface of the drive roller 32, and the outlet direction is consistent with the movement direction of the pre-polishing belt 34 around the drive roller 32. This allows the polishing slurry containing abrasive debris to be concentrated and guided out along the movement trend of the pre-polishing belt 34, reducing the backflow of abrasive debris in the pre-polishing area.

[0042] The flexible fine polishing mechanism 4 is located on the discharge side of the sand belt pre-polishing mechanism 3. The flexible fine polishing mechanism 4 includes a fine polishing bracket 41, a floating seat 42, a splined shaft 43, a flexible polishing roller 44, a guide seat 424, a cam 425, and a motor 426. The fine polishing bracket 41 is lifted and installed in the polishing box 1 and located on the discharge side of the sand belt pre-polishing mechanism 3. The floating seat 42 is slidably installed below the fine polishing bracket 41. The flexible polishing roller 44 is rotatably located at the lower part of the floating seat 42, so that the flexible polishing roller 44 can approach the surface of the steel plate under the support of the floating seat 42 and perform fine polishing on the surface of the pre-polished steel plate.

[0043] Spline shaft 43 is fixedly mounted at one end of flexible polishing roller 44, and rotatably mounted below fine polishing bracket 41. Guide seat 424 is located at the end of floating seat 42. Motor 426 is located above fine polishing bracket 41. Cam 425 is located at the output end of motor 426 and abuts against guide seat 424. When motor 426 drives cam 425 to rotate, cam 425 can periodically squeeze guide seat 424 and drive floating seat 42 to swing slightly along the axial direction of flexible polishing roller 44 through guide seat 424.

[0044] The flexible fine polishing mechanism 4 also includes a lifting guide frame 411, a lifting slide 412, a lead screw 413, and a lifting drive shaft 414. The lifting guide frame 411 is fixedly installed inside the polishing box 1. The lifting slide 412 is slidably installed inside the lifting guide frame 411. The lead screw 413 is rotatably installed inside the lifting guide frame 411. A lead screw groove adapted to the lead screw 413 is opened in the middle of the lifting slide 412. The lifting drive shaft 414 is installed at the top of the lifting guide frame 411 and is connected to the lead screw 413 for transmission. The fine polishing bracket 41 is fixedly installed on the lifting slide 412, so that the lifting drive shaft 414 can drive the lifting slide 412 to move up and down through the lead screw 413 and synchronously adjust the height of the fine polishing bracket 41 and the flexible polishing roller 44.

[0045] The floating seat 42 is provided with a guide sleeve 421, a guide rod 422 and a fixed seat 423. The fixed seat 423 is fixedly disposed on the lower part of the fine polishing bracket 41. The guide rod 422 is fixedly disposed on the inner side of the fixed seat 423 along the axial direction of the flexible polishing roller 44. The guide sleeve 421 is fixedly disposed on the inner side of the floating seat 42 and sleeved on the outer side of the guide rod 422, so that the floating seat 42 can slide along the axial path defined by the guide rod 422 when pushed by the cam 425.

[0046] A return spring is provided between the floating seat 42 and the fixed seat 423. The return spring is sleeved on the outside of the guide rod 422. The two ends of the return spring abut against the floating seat 42 and the fixed seat 423 respectively. After the cam 425 releases the pressure on the guide seat 424, the return spring can push the floating seat 42 back to the initial position and cooperate with the cam 425 to form a continuous axial micro-oscillation motion.

[0047] The flexible fine polishing mechanism 4 also includes a bushing 45 and a fine polishing motor 451. The bushing 45 is rotatably mounted on the fine polishing bracket 41 and is sleeved on the outside of the spline shaft 43 and splinedly engaged with the spline shaft 43. The fine polishing motor 451 is fixedly mounted on one side of the fine polishing bracket 41 and is driven by the bushing 45, so that the fine polishing motor 451 can drive the flexible polishing roller 44 to rotate through the bushing 45 and the spline shaft 43, and maintain continuous transmission when the flexible polishing roller 44 swings slightly axially with the floating seat 42.

[0048] The flexible polishing mechanism 4 also includes a polishing liquid spray pipe 46 and a liquid blocking and scraping assembly 47. The polishing liquid spray pipe 46 is fixedly installed on the polishing support 41 and located at the tangent of the flexible polishing roller 44. Multiple nozzles 461 are fixedly installed in the middle of the polishing liquid spray pipe 46. The spraying direction of the nozzles 461 is towards the tangent position of the outer peripheral surface of the flexible polishing roller 44. The liquid blocking and scraping assembly 47 is fixedly installed at the lower part of the polishing support 41 and located on the side of the flexible polishing roller 44 close to the working support mechanism 2, so that the polishing liquid can enter the polishing contact area with the flexible polishing roller 44 and be restricted from splashing by the liquid blocking and scraping assembly 47.

[0049] When using the mirror polishing equipment for mirror steel plates according to the present invention, before the equipment is put into operation, the positions of the working bearing mechanism 2 and the flexible fine polishing mechanism 4 are adjusted according to the thickness of the mirror steel plate and the polishing pressure requirements. The support height of the bearing frame 21 and the supporting conveyor belt 22 is adjusted by the lifting support 24 so that the supporting conveyor belt 22 corresponds to the conveying surface of the feeding and discharging conveying mechanism 5 on both sides. At the same time, the lifting drive shaft 414 drives the lead screw 413 to rotate. The lead screw 413 drives the lifting slide 412 to slide up and down along the lifting guide frame 411. The lifting slide 412 synchronously drives the fine polishing bracket 41 to adjust its height so that the flexible polishing roller 44 is in a fine polishing position suitable for contacting the surface of the steel plate.

[0050] After the equipment is started, the feeding and discharging conveyor 5 on the feeding side sends the mirror steel plate into the polishing box 1. After the steel plate enters the working bearing mechanism 2, it is supported by the supporting conveyor belt 22 and continues to be conveyed forward. The steel plate first enters the area below the sand belt pre-polishing mechanism 3. The drive shaft 321 drives the drive roller 32 to rotate. The drive roller 32 drives the pre-polishing sand belt 34, which is arranged around the outside of the drive roller 32 and the driven roller 33, to circulate. The pre-polishing sand belt 34 contacts the upper surface of the steel plate and performs pre-polishing treatment on the surface of the steel plate.

[0051] During the pre-polishing process, the pre-polishing belt 34 continuously rubs and polishes the surface of the steel plate. The initial texture, attached particles, and local rough areas on the surface of the steel plate are treated by the pre-polishing belt 34 to form the base polishing surface. The polishing liquid guide cover 35 is located outside the pre-polishing belt 34 and restricts the polishing liquid and abrasive debris scattered during the pre-polishing process. The polishing liquid containing abrasive debris is concentrated downward along the upper-wide and lower-narrow contraction channel of the polishing liquid guide cover 35 and discharged through the polishing liquid outlet 36 along the tangential direction of the outer peripheral surface of the drive roller 32, thereby reducing the return of pre-polishing abrasive debris on the surface of the steel plate.

[0052] After the steel plate completes the pre-polishing, it continues to move along the working bearing mechanism 2 toward the discharge side and enters below the flexible fine polishing mechanism 4. The fine polishing motor 451 drives the bushing 45 to rotate. The bushing 45 drives the spline shaft 43 to rotate through the spline engagement with the spline shaft 43. The spline shaft 43 then drives the flexible polishing roller 44 to rotate, so that the flexible polishing roller 44 acts on the surface of the steel plate after pre-polishing in a flexible contact manner.

[0053] During the flexible fine polishing process, the motor 426 drives the cam 425 to rotate. The outer circumferential surface of the cam 425 periodically abuts against and presses the guide seat 424. The guide seat 424 transmits the pressing force to the floating seat 42, causing the floating seat 42 to slide relative to the fixed seat 423 along the axial direction of the guide rod 422. The floating seat 42 drives the flexible polishing roller 44 to swing slightly along its axial direction. When the cam 425 releases the pressure, the return spring pushes the floating seat 42 back to its original position, so that the flexible polishing roller 44 forms a continuous axial reciprocating micro-swinging motion.

[0054] The flexible polishing roller 44 is driven by the fine polishing motor 451 to keep rotating, and at the same time, it is driven by the floating seat 42 to perform axial micro-oscillation. The rotational action makes the flexible polishing roller 44 continuously perform fine polishing on the steel plate surface. The axial micro-oscillation action makes the fine polishing trajectory of the flexible polishing roller 44 laterally cover the directional texture formed by the pre-polishing sand belt 34. The splined engagement between the spline shaft 43 and the bushing 45 ensures that the flexible polishing roller 44 maintains a stable rotational transmission path during axial micro-oscillation, thereby ensuring the continuity of the fine polishing process.

[0055] During the flexible fine polishing process, the fine polishing liquid spray pipe 46 sprays fine polishing liquid through multiple nozzles 461 to the tangential position of the outer peripheral surface of the flexible polishing roller 44. As the flexible polishing roller 44 rotates, the fine polishing liquid is carried into the contact area between the flexible polishing roller 44 and the steel plate surface, so that the fine polishing liquid can participate in the polishing contact process of the flexible polishing roller 44. The liquid blocking and scraping assembly 47 is located on the side of the flexible polishing roller 44 close to the working bearing mechanism 2 and restricts the fine polishing liquid from flying outward, so that the fine polishing liquid and fine abrasive are constrained within the fine polishing area.

[0056] After the steel plate passes through the pre-polishing mechanism 3 and the flexible fine polishing mechanism 4 in sequence, the surface is first formed by the pre-polishing sand belt 34 to form a basic polishing surface, and then the flexible polishing roller 44 performs cross-covering fine polishing under the combined action of rotation and axial micro-oscillation. After the fine polishing is completed, the steel plate is continued to be sent to the discharge side by the working bearing mechanism 2, and is output to the polishing box 1 through the inlet and outlet conveying mechanism 5 on the discharge side, thus completing one mirror polishing operation of the mirror steel plate.

[0057] Finally, it should be noted that the above description 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 foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mirror polishing equipment for steel plates, comprising a polishing box (1), a working bearing mechanism (2), and an infeed / outfeed conveying mechanism (5), characterized in that: The working bearing mechanism (2) is located at the lower part of the polishing box (1), and the two feeding and discharging conveying mechanisms (5) are respectively located on the feeding side and the discharging side of the working bearing mechanism (2). The sand belt pre-polishing mechanism (3) and the flexible fine polishing mechanism (4) are arranged in sequence above the working bearing mechanism (2). The pre-polishing belt mechanism (3) includes a pre-polishing bracket (31), a drive roller (32), a driven roller (33), and a pre-polishing belt (34). The pre-polishing bracket (31) is fixedly installed inside the polishing box (1). The drive roller (32) and the driven roller (33) are rotatably disposed at both ends of the pre-polishing bracket (31). The pre-polishing belt (34) is wrapped around the outside of the drive roller (32) and the driven roller (33). The flexible polishing mechanism (4) includes a polishing bracket (41), a floating seat (42), a splined shaft (43), a flexible polishing roller (44), a guide seat (424), a cam (425), and a motor (426). The polishing bracket (41) is vertically mounted inside the polishing box (1) and located on the discharge side of the belt pre-polishing mechanism (3). The floating seat (42) is slidably mounted below the polishing bracket (41). The flexible polishing roller (44) is rotatably mounted on the lower part of the floating seat (42). The spline shaft (43) is fixedly disposed at one end of the flexible polishing roller (44), and the spline shaft (43) is rotatably mounted below the fine polishing bracket (41). The guide seat (424) is disposed at the end of the floating seat (42). The motor (426) is disposed above the fine polishing bracket (41). The cam (425) is disposed at the output end of the motor (426) and abuts against the guide seat (424). The cam (425) presses the guide seat (424) to drive the floating seat (42) to swing slightly axially. The flexible fine polishing mechanism (4) further includes a lifting guide frame (411), a lifting slide (412), a lead screw (413), and a lifting drive shaft (414). The lifting guide frame (411) is fixedly installed inside the polishing box (1). The lifting slide (412) is slidably installed inside the lifting guide frame (411). The lead screw (413) is rotatably installed inside the lifting guide frame (411). A lead screw groove adapted to the lead screw (413) is opened in the middle of the lifting slide (412). The lifting drive shaft (414) is installed at the top of the lifting guide frame (411) and is connected to the lead screw (413) in a transmission connection. The fine polishing bracket (41) is fixedly installed on the lifting slide (412). The floating seat (42) is provided with a guide sleeve (421), a guide rod (422) and a fixed seat (423). The fixed seat (423) is fixedly disposed on the lower part of the fine polishing bracket (41). The guide rod (422) is fixedly disposed on the inner side of the fixed seat (423) along the axial direction of the flexible polishing roller (44). The guide sleeve (421) is fixedly disposed on the inner side of the floating seat (42) and sleeved on the outer side of the guide rod (422).

2. The mirror polishing equipment for mirror-finished steel plates according to claim 1, characterized in that: The pre-polishing belt mechanism (3) also includes a drive shaft (321), which passes through the pre-polishing bracket (31) and is coaxially fixed with the drive roller (32).

3. The mirror polishing equipment for mirror-finished steel plates according to claim 1, characterized in that: The pre-polishing belt mechanism (3) further includes a polishing liquid guide cover (35) and a polishing liquid outlet (36). The polishing liquid guide cover (35) is fixedly disposed on the outside of the pre-polishing bracket (31) and the polishing liquid guide cover (35) is located on the outside of the pre-polishing belt (34). The polishing liquid outlet (36) is fixedly disposed at the bottom end of the polishing liquid guide cover (35).

4. The mirror polishing equipment for mirror steel plates according to claim 3, characterized in that: The longitudinal section of the polishing liquid guide cover (35) has a tapered structure that is wider at the top and narrower at the bottom. The outlet direction of the polishing liquid outlet (36) extends along the tangent direction of the outer peripheral surface of the drive roller (32), and the outlet direction is consistent with the movement direction of the pre-polishing belt (34) around the drive roller (32).

5. The mirror polishing equipment for mirror steel plates according to claim 1, characterized in that: A return spring is provided between the floating seat (42) and the fixed seat (423). The return spring is sleeved on the outside of the guide rod (422), and the two ends of the return spring abut against the floating seat (42) and the fixed seat (423) respectively.

6. The mirror polishing equipment for mirror steel plates according to claim 1, characterized in that: The flexible fine polishing mechanism (4) further includes a bushing (45) and a fine polishing motor (451). The bushing (45) is rotatably mounted on the fine polishing bracket (41). The bushing (45) is sleeved on the outside of the spline shaft (43) and splines with the spline shaft (43). The fine polishing motor (451) is fixedly mounted on one side of the fine polishing bracket (41) and drives the bushing (45).

7. The mirror polishing equipment for mirror steel plates according to claim 1, characterized in that: The flexible polishing mechanism (4) further includes a polishing liquid spray pipe (46) and a liquid blocking and scraping assembly (47). The polishing liquid spray pipe (46) is fixedly installed on the polishing bracket (41) and located at the tangent of the flexible polishing roller (44). A plurality of nozzles (461) are fixedly installed in the middle of the polishing liquid spray pipe (46). The spraying direction of the nozzles (461) is towards the tangent of the outer peripheral surface of the flexible polishing roller (44). The liquid blocking and scraping assembly (47) is fixedly installed at the lower part of the polishing bracket (41) and located on the side of the flexible polishing roller (44) close to the working support mechanism (2).

8. The mirror polishing equipment for mirror steel plates according to claim 1, characterized in that: The working support mechanism (2) includes a support frame (21), a support conveyor belt (22), a lower support box (23), and a lifting support (24). The support conveyor belt (22) is located above the support frame (21) and below the sand belt pre-polishing mechanism (3) and the flexible fine polishing mechanism (4). The lower support box (23) is located below the support frame (21). The lifting support (24) is supported between the support frame (21) and the lower support box (23).

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