Floating polishing head and pressure control device for stone sculpture polishing procedure

Abstract

The invention relates to the technical field of polishing, in particular to a floating polishing head and pressure control device for stone sculpture polishing procedure, which comprises a polishing seat, a fixed seat fixed on one side of the polishing seat and a hollow shaft vertically penetrating and rotatably mounted on one side of the polishing seat through a bearing, and a turntable is arranged at the bottom end of the hollow shaft. And a plurality of connecting frames are fixedly installed at the edge of the top end of the rotating disc in a surrounding mode at equal angles, and through arrangement of a switching assembly and a compression assembly, when the floating polishing head is used, after a current polishing block completes polishing, a control module controls a driving motor to stop running, an air cylinder lifts an abutting column, and then the current polishing block is compressed; indexing of the abutting column is achieved through the worm gear, the worm, the ratchet wheel and the driving rack, then the abutting column is inserted into the lower limiting base, polishing block switching is automatically completed, the defects that an existing device is long in shutdown time and depends on manpower are overcome, the shutdown time is shortened, operation continuity is improved, and operation errors are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the polishing technical field, and in particular to a floating polishing head and pressure control device for stone carving polishing process. BACKGROUND

[0002] The existing polishing device is usually fixedly connected with a mechanical arm during use, and the polishing head is moved to the area to be processed of the stone carving plate by the mechanical arm, and the polishing head is gradually close to the surface of the stone carving plate and reaches the preset polishing distance through the position adjustment of the mechanical arm. Then the driving motor of the device is started, and the driving motor drives the polishing head to rotate as a whole through gear transmission structure, and the polishing block on the polishing head rotates with the polishing head and produces friction contact with the surface of the stone carving plate, so as to polish the surface of the stone. When the polishing of the current stage is completed and different mesh polishing blocks need to be switched to adapt to the subsequent processing requirements, the driving motor and the mechanical arm need to be stopped, and then the current polishing block is manually disassembled, the new polishing block corresponding to the mesh is installed on the polishing head, and after installation, the relative position of the polishing head and the stone carving plate needs to be calibrated again. After confirming that there is no error, the driving motor and the mechanical arm are restarted, and the next stage of polishing operation can be continued.

[0003] The polishing head of the existing polishing device has many use defects, which seriously affects the polishing efficiency and quality: first, the polishing block switching depends on manual operation and is low in efficiency. The polishing block needs to be stopped during switching, manually disassembled and installed, which not only consumes a lot of time, but also easily causes the installation position of the polishing block to deviate due to manual operation error, and then the polishing block and the stone are not in uniform contact during the subsequent polishing process, which affects the polishing precision and flatness of the surface of the stone carving plate. SUMMARY

[0004] The present application aims to provide a floating polishing head and pressure control device for stone carving polishing process to solve the problems in the background art.

[0005] In order to achieve the above object, the present application provides the following technical scheme: a floating polishing head for stone carving polishing process, comprising a polishing seat, a fixed seat fixed on one side of the polishing seat, and a hollow shaft vertically penetrating and rotatingly installed on one side of the polishing seat through a bearing, the bottom end of the hollow shaft is provided with a rotating disc, the top end edge of the rotating disc is fixedly installed with a plurality of connecting frames at equal angles, the one end of the plurality of connecting frames away from the rotating disc is fixedly installed on the outside of one side of the hollow shaft, the bottom end of the rotating disc is provided with a plurality of polishing assemblies of different mesh around, the inside of the bottom end of the hollow shaft is provided with a switching assembly, the top end of the polishing seat is provided with a driving motor, and the middle part of the rotating disc is provided with a circular hole penetratingly formed. Each polishing assembly comprises two symmetrically arranged limiting seats, the two symmetrically arranged limiting seats are attached to the bottom surface of the rotating disc, the inside of the bottom end of each limiting seat is provided with a limiting sliding groove, the inside of the limiting sliding groove is slidingly and clampingly installed with a polishing block, the top end of the rotating disc near each limiting seat is provided with a compression assembly and a liquid spraying assembly; the switching assembly comprises a cylinder and a rotating frame, the cylinder is vertically arranged in the inside of the hollow shaft, the rotating frame is transversely arranged at the bottom end of the output end of the cylinder, the top end of the cylinder is fixedly installed with a supporting frame, the both ends of the supporting frame are fixedly installed on the inner wall of the hollow shaft, and the bottom end output end of the cylinder is fixedly installed with a positioning seat; the compression assembly comprises two limiting rods and an auxiliary frame, the both ends of the two limiting rods are symmetrically fixedly installed on the top end outside of the limiting seat, the top end of the two limiting rods is slidingly installed on the top end outside of the rotating disc, the both ends of the auxiliary frame are fixedly installed on the top end of the limiting rod on the corresponding side, the outside of each limiting rod is sleeved with a compression spring, and the both ends of the compression spring are fixedly installed on the top end of the rotating disc and the bottom end of the auxiliary frame respectively.

[0006] Further, the side of the polishing seat near the driving motor is fixedly installed with a mounting seat, the driving motor is fixedly installed on the top end of the mounting seat, the output end of the driving motor is fixedly installed with a driving gear, the outside of the hollow shaft near the driving gear is fixedly installed with a gear ring penetratingly, and the gear ring is meshingly connected with the driving gear.

[0007] Further, the inside of the side of the limiting seat near the opening end of the limiting sliding groove is penetratingly and threadedly installed with a limiting bolt, and the side outside of the limiting bolt is abuttingly attached to one end of the polishing block.

[0008] Further, the bottom end middle part of the positioning seat is vertically and rotatingly clampingly installed with a rotating rod, the bottom end of the rotating rod is fixedly connected with the top end middle part of the rotating frame, the both ends of the bottom part of the rotating frame are vertically fixed with abutting columns, the outside of the abutting column near the top end is sleeved and fixedly installed with a limiting ring, the outside of the rotating rod near the top end is penetratingly fixed with a worm gear, the inside of the side of the limiting seat near the abutting column is penetratingly provided with an abutting hole, and the abutting hole is insertingly matched with the abutting column.

[0009] Further, two positioning frames are symmetrically fixed on one side of the positioning seat close to the worm wheel, a worm is rotatably and claspingly installed between the two positioning frames, the worm is meshingly connected with the worm wheel, a ratchet wheel is fixedly installed on one end of the worm, and a driving rack is vertically and fixedly installed on the inner wall of one side of the hollow shaft close to the ratchet wheel.

[0010] Further, the liquid spraying assembly comprises a piston rod and a liquid collecting cylinder, the piston rod is vertically fixed at the middle of the bottom end of the auxiliary frame, the liquid collecting cylinder is vertically fixed at the top end of the rotating disc, the piston end of the piston rod is slidingly and sealingly installed in the liquid collecting cylinder, and two one-way liquid discharge valve pipes are symmetrically and fixedly installed at the bottom end of the liquid collecting cylinder.

[0011] Further, the output end of each one-way liquid discharge valve pipe is fixedly and communicatively connected with the first stretching pipe, and the bottom end of the limiting seat is fixedly and sealingly connected with the nozzle pipe.

[0012] Further, a one-way liquid inlet valve pipe is fixedly and penetratively installed at one side of the bottom end of the liquid collecting cylinder, the input end of the one-way liquid inlet valve pipe is fixedly and communicatively connected with the second stretching pipe, one end of the second stretching pipe is fixedly and penetratively installed in the bottom end of the liquid storage tank, the liquid storage tank is fixedly and sealingly installed at one side of the connecting frame, and the top end of the liquid storage tank is threadedly connected with a sealing cover.

[0013] The application also provides a pressure control device for the floating polishing head for the stone polishing process, which comprises a distance sensor, and the distance sensor is fixedly and embededly installed in the bottom end of the resisting column.

[0014] Compared with the prior art, the application has the following beneficial effects: Through the arrangement of the switching assembly and the compression assembly, when the floating polishing head is used, the control module can control the driving motor to stop running after the current polishing block is finished polishing, the cylinder can lift the resisting column, the resisting column can be transposed through the worm wheel, the worm, the ratchet wheel and the driving rack, and the next set of limiting seats can be inserted, so that the polishing block switching is automatically completed, the defects of long downtime and dependence on manual operation of the existing device are solved, the downtime is shortened, the operation continuity is improved, and the operation error is reduced.

[0015] Through the arrangement of the compression assembly and the liquid spraying assembly, when the floating polishing head is used, the corresponding set of liquid storage tanks can be filled with the polishing agent suitable for the mesh number of the polishing block at the bottom end of the rotating disc, the polishing agent can be prevented from being polluted or evaporated by means of the sealing cover at the top end of the liquid storage tank, the polishing quality instability problem of the existing device caused by the mismatch of the polishing agent is solved through the independent liquid storage and the mesh number corresponding design, meanwhile, the synchronous effect of liquid supply when the polishing is started can be realized, and the overall polishing effect is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the bottom view of the rotating disc and the limiting seat of the present application; Figure 3 is a schematic diagram of the three-dimensional structure of the limiting seat and the polishing block of the present application; Figure 4 is a schematic diagram of the partial cross-sectional view of the rotating disc and the circular hole of the present application; Figure 5 is a schematic diagram of the three-dimensional structure of the limiting seat and the limiting bolt of the present application; Figure 4 is a schematic diagram of the enlarged structure at position A; Figure 6 is a schematic diagram of the bottom view of the positioning seat and the rotating rod of the present application; Figure 7 is a schematic diagram of the three-dimensional structure of the limiting seat and the limiting bolt of the present application; Figure 8 is a schematic diagram of the partial cross-sectional view of the rotating disc and the limiting rod of the present application; Figure 9 is a schematic diagram of the bottom view of the piston rod and the liquid collecting cylinder of the present application; Figure 10 is a schematic diagram of the three-dimensional structure of the limiting seat and the first stretching pipe of the present application; Figure 9 is a schematic diagram of the enlarged structure at position B; Figure 11 is a schematic diagram of the three-dimensional structure of the limiting seat and the first stretching pipe of the present application; Figure 12 is a schematic diagram of the top view of the rotating disc and the liquid storage tank of the present application.

[0017] In the drawings, the components represented by each reference numeral are listed as follows: 1, polishing seat; 2, fixed seat; 3, hollow shaft; 4, connecting frame; 5, rotating disc; 6, mounting seat; 7, driving motor; 8, driving gear; 9, gear ring; 10, limiting seat; 11, limiting sliding groove; 12, polishing block; 13, limiting bolt; 14, limiting rod; 15, auxiliary frame; 16, compression spring; 17, support frame; 18, air cylinder; 19, positioning seat; 20, rotating rod; 21, rotating frame; 22, abutting column; 23, limiting ring; 24, positioning frame; 25, worm; 26, ratchet wheel; 27, driving rack; 28, worm wheel; 29, distance sensor; 30, piston rod; 31, liquid collecting cylinder; 32, one-way liquid discharge valve pipe; 33, first stretching pipe; 34, nozzle pipe; 35, one-way liquid inlet valve pipe; 36, second stretching pipe; 37, liquid storage tank; 38, circular hole; 39, abutting hole; 40, sealing cover. DETAILED DESCRIPTION

[0018] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present application.

[0019] Embodiment one: please refer to Figure 1 Figure 8 A floating polishing head for stone carving polishing process, comprising a polishing seat 1, a fixed seat 2 fixed on one side of the polishing seat 1, and a hollow shaft 3 vertically penetrating and rotatingly installed on one side of the polishing seat 1 through bearings, the bottom end of the hollow shaft 3 is provided with a turntable 5, a plurality of connecting frames 4 are fixedly installed at equal angles around the top edge of the turntable 5, the ends of the plurality of connecting frames 4 away from the turntable 5 are fixedly installed on the outside of one side of the hollow shaft 3, a plurality of polishing assemblies with different mesh numbers are arranged around the bottom end of the turntable 5, a switching assembly is arranged inside the bottom end of the hollow shaft 3, a driving motor 7 is arranged on one side of the top end of the polishing seat 1, and a circular hole 38 is formed in the middle of the turntable 5.

[0020] The polishing seat 1 is fixedly installed with a mounting seat 6 on one side close to the driving motor 7, the driving motor 7 is fixedly installed on the top end of the mounting seat 6, a driving gear 8 is fixedly installed on the output end of the driving motor 7, a gear ring 9 is fixedly installed on the outside of the hollow shaft 3 close to the driving gear 8, and the gear ring 9 is in meshing connection with the driving gear 8.

[0021] A limiting bolt 13 is threadedly installed in the inside of the limiting seat 10 close to the opening end of the limiting sliding groove 11, and one side of the limiting bolt 13 is in abutting contact with one end of the polishing block 12.

[0022] The switching assembly comprises a cylinder 18 and a rotating frame 21, the cylinder 18 is vertically arranged in the inside of the hollow shaft 3, the rotating frame 21 is horizontally arranged at the bottom end of the output end of the cylinder 18, a supporting frame 17 is fixedly installed on the top end of the cylinder 18, the two ends of the supporting frame 17 are fixedly installed on the inner wall of the hollow shaft 3, and a positioning seat 19 is fixedly installed on the bottom end output end of the cylinder 18.

[0023] ​The middle part of the bottom end of the positioning seat 19 is vertically rotatably clamped and installed with a rotating rod 20, the bottom end of the rotating rod 20 is fixedly connected with the middle part of the top end of a rotating frame 21, the bottom ends of the two ends of the rotating frame 21 are both vertically fixed with a resisting column 22, the outer part of the top end of the resisting column 22 is both fixedly sleeved with a limiting ring 23, the outer part of the top end of the rotating rod 20 is fixedly penetrated with a worm wheel 28, the inner part of the side of the limiting seat 10 close to the resisting column 22 is fixedly penetrated with a resisting hole 39, and the resisting hole 39 can be inserted and matched with the resisting column 22.

[0024] The side of the positioning seat 19 close to the worm wheel 28 is fixedly provided with two positioning frames 24 in symmetry, the worm 25 is rotatably clamped and installed between the two positioning frames 24, the worm 25 is meshingly connected with the worm wheel 28, one end of the worm 25 is fixedly installed with a ratchet wheel 26, and the inner wall of the side of the hollow shaft 3 close to the ratchet wheel 26 is vertically fixedly installed with a driving rack 27.

[0025] The compression assembly comprises two limiting rods 14 and an auxiliary frame 15, the two limiting rods 14 are fixedly installed on the top end of the limiting seat 10 in symmetry, the top ends of the two limiting rods 14 are slidably installed on the top end of the rotating disc 5, and the two ends of the auxiliary frame 15 are fixedly installed on the top ends of the limiting rods 14 on the corresponding sides.

[0026] The application also provides a pressure control device for a floating polishing head used in a stone polishing process, which comprises a distance sensor, and the distance sensor is fixedly embedded on the inner bottom end of the resisting column.

[0027] In the embodiment, when the polishing head device is used, first, the fixed seat 2 is fixed on an existing mechanical arm, the mechanical arm drives the polishing head and the pressure control device to move to a stone plate to be processed. The driving motor 7 on the top end mounting seat 6 of the polishing seat 1 is started, the output end of the driving motor 7 drives the driving gear 8 to rotate, so that the driving gear 8 drives the meshing gear ring 9 to rotate, the hollow shaft 3 is driven to rotate through the rotation of the gear ring 9, and then the rotating disc 5 is synchronously rotated through the equiangularly fixed connecting frame 4 on the top end edge of the rotating disc 5, so as to provide stable rotating power for subsequent polishing operation.

[0028] When the polishing operation starts, the mechanical arm drives the device to descend as a whole, so that the polishing assembly at the bottom end of the turntable 5 gradually approaches the surface of the stone carving plate. The switching assembly starts to work: the cylinder 18 is fixed in the hollow shaft 3 inner wall through the support frame 17 at the top end, and the bottom end output end pushes the positioning seat 19 to move downward, and the rotating rod 20 at the bottom end of the positioning seat 19 rotates and engages, thereby driving the transversely arranged rotating frame 21 to move downward, the two ends of the rotating frame 21 are vertically fixed, and the abutting column 22 at the bottom is synchronously moved downward, passes through the round hole 38, and finally is inserted into the abutting hole 39 of the limiting seat 10 in the corresponding polishing assembly. During the continuous moving process, the abutting column 22 pushes the limiting seat 10 and the polishing block 12 to descend through the abutting hole 39, and as the polishing block 12 descends, the compression assembly acts synchronously: the limiting rod 14 fixed symmetrically at the top end of the limiting seat 10 moves downward with the limiting seat 10, the auxiliary frame 15 fixed at the top end of the limiting rod 14 is compressed and sleeved outside the limiting rod 14, and the compression spring 16 is compressed until the polishing block 12 of this group protrudes from other polishing assemblies and contacts the surface of the stone carving plate and starts polishing.

[0029] During polishing, the distance sensor 29 embedded at the bottom end of the abutting column 22 detects the distance between the polishing block 12 and the stone carving plate in real time: if the distance is too small (indicating that the polishing pressure is too large, which is easy to cause over-polishing or stone damage), the distance sensor 29 feeds back the signal to the control module, the control module reduces the internal gas pressure of the cylinder 18, the rotating frame 21 is slightly lifted, the compression spring 16 rebounds to drive the auxiliary frame 15, the limiting rod 14 and the limiting seat 10 to move upward, and the polishing block 12 moves upward synchronously, and the polishing pressure is reduced accordingly; if the distance is too large (indicating that the polishing pressure is insufficient, which is easy to cause missed polishing), the control module increases the gas pressure of the cylinder 18, drives the rotating frame 21 to move downward, and the polishing block 12 protrudes again, the pressure increases, and through this dynamic adjustment, the polishing pressure is always adapted to the surface condition of the stone carving plate, the pressure floating control is realized, and the polishing precision and surface gloss are ensured.

[0030] After the polishing block 12 of the current group of mesh completes the corresponding stage of polishing, the control module first controls the driving motor 7 to stop running, so that the driving gear 8 and the gear ring 9 stop meshing and transmitting, and the hollow shaft 3 and the turntable 5 are stationary, avoiding the interference of the rotation of the turntable 5 on the switching positioning.

[0031] Subsequently, the existing external control module reduces the internal gas pressure of the cylinder 18, the cylinder 18 output end drives the positioning seat 19, the rotating rod 20 and the rotating frame 21 to lift upward, the abutting column 22 at both ends of the rotating frame 21 moves upward synchronously, gradually leaves the abutting hole 39 of the current limiting seat 10, until completely exits the abutting hole 39 and rises above the round hole 38 of the turntable 5, and completely separates from the current group of polishing assemblies, reserving space for subsequent rotation switching.

[0032] At this time, the control module controls the cylinder 18 to continue to lift, and the positioning seat 19 and the positioning frames 24 on both sides move upward synchronously with the output end of the cylinder 18, and the worm 25 between the positioning frames 24 and the ratchet wheel 26 at one end also rise. Since the driving rack 27 on the inner wall of the hollow shaft 3 is in a fixed state, when the ratchet wheel 26 rises to mesh with the driving rack 27 along with the positioning seat 19, the teeth of the driving rack 27 will drive the ratchet wheel 26 to rotate around its own axis, thereby driving the worm 25 fixedly connected with the ratchet wheel 26 to rotate between the positioning frames 24. Since the worm 25 meshes with the worm wheel 28 at the top end of the rotating rod 20, the rotation of the worm 25 will drive the worm wheel 28 and the rotating rod 20 to rotate synchronously, and the bottom end of the rotating rod 20 is fixedly connected with the rotating frame 21, so the rotating frame 21 and the abutting columns 22 at both ends will rotate synchronously with the rotating rod 20, and the rotation angle matches the interval angle of the adjacent two groups of polishing assemblies at the bottom end of the rotating disc 5, until the abutting columns 22 are aligned above the abutting holes 39 of the next group of limiting seats 10.

[0033] After the abutting columns 22 complete positioning, the control module controls the output end of the cylinder 18 to move downward, drives the rotating frame 21 and the abutting columns 22 to pass through the circular hole 38, and accurately inserts into the abutting hole 39 of the next group of limiting seats 10. The abutting columns 22 continue to move downward and push the limiting seat 10 and the polishing block 12 to descend along the limiting sliding groove 11, and the limiting rod 14 drives the auxiliary frame 15 to compress the compression spring 16, so that the next group of polishing blocks 12 protrude from other components, and the automatic switching is completed. Then restart the driving motor 7, and the polishing work of the next group of mesh can be started, thereby solving the defects that the existing polishing device has a long downtime when switching the polishing block 12 and relies on manual intervention. The polishing block 12 does not need to be disassembled throughout the process, the switching is automatically completed, the downtime is greatly shortened, the continuity of the polishing work is improved, manual operation errors are reduced, device components are protected, and the switching efficiency and operation reliability are considered.

[0034] When it is necessary to replace the polishing block 12, the structural advantages of the limiting sliding groove 11 can be used to quickly complete the operation: first, stop the device from running, and the mechanical arm lifts the whole device to make all the polishing blocks 12 separate from the stone carving plate; then, the limiting bolt 13 close to the opening end of the limiting sliding groove 11 is loosened, and the abutting state of one end of the limiting bolt 13 and the polishing block 12 is released. At this time, since the limiting sliding groove 11 provides a complete sliding channel for the polishing block 12, the old polishing block 12 can be directly pulled out from the opening end of the limiting sliding groove 11. A new polishing block 12 with an appropriate mesh is taken, and is slid along the channel of the limiting sliding groove 11 until one end of the polishing block 12 is attached to the inner wall of the limiting sliding groove 11. Finally, the limiting bolt 13 is tightened to make one end of the limiting bolt 13 abut and attach to the new polishing block 12, and the positioning and fixing of the polishing block 12 are completed. The whole replacement process does not need to disassemble the limiting seat 10, solves the problem that the traditional polishing device needs to disassemble components and is complicated to operate when replacing the polishing block 12, and greatly shortens the replacement time.

[0035] Example two: please refer toFigure 8 Figure 12 The embodiment further illustrates the first embodiment. The liquid spraying assembly includes a piston rod 30 and a liquid collecting cylinder 31. The piston rod 30 is vertically fixed at the middle of the bottom end of the auxiliary frame 15, and the liquid collecting cylinder 31 is vertically fixed at the top end of the rotary disc 5. The piston end of the piston rod 30 is slidingly and sealingly installed in the interior of the liquid collecting cylinder 31. Two one-way liquid discharging valve pipes 32 are symmetrically and fixedly penetrated through the bottom end of the liquid collecting cylinder 31.

[0036] The output end of each one-way liquid discharging valve pipe 32 is fixedly and conductively connected with a first stretching pipe 33. The bottom end of the limiting seat 10 is fixedly and sealingly installed with a spraying head pipe 34 on each side. The output end of the first stretching pipe 33 is fixedly and conductively connected with the input end of the corresponding spraying head pipe 34.

[0037] A one-way liquid inlet valve pipe 35 is fixedly and penetrated through one side of the bottom end of the liquid collecting cylinder 31. The input end of the one-way liquid inlet valve pipe 35 is fixedly and conductively connected with a second stretching pipe 36. One end of the second stretching pipe 36 is fixedly and penetrated through the interior of the bottom end of a liquid storage tank 37. The liquid storage tank 37 is fixedly and sealingly installed on one side of the connecting frame 4. A sealing cover 40 is threadedly connected with the top end of the liquid storage tank 37.

[0038] In the embodiment, before the floating polishing head and the pressure control device are used, the polishing agent suitable for each group of polishing blocks 12 is filled in the corresponding liquid storage tank 37 according to the mesh number of the polishing blocks 12 at the bottom end of the rotary disc 5. When the polishing agent is filled, the sealing cover 40 at the top end of the liquid storage tank 37 is opened, the polishing agent matching the mesh number of the polishing blocks 12 is injected into the tank, and then the sealing cover 40 is screwed to prevent the polishing agent from being contaminated or evaporated.

[0039] The polishing agent suitable for different mesh numbers of polishing blocks 12 has obvious differences in functions. For low-mesh polishing blocks 12, the corresponding liquid storage tank 37 needs to be filled with cutting-type polishing liquid containing corundum particles. The high-hardness particles can help the low-mesh polishing blocks 12 quickly remove the scratches and burrs on the surface of the stone carving plate. If a high-mesh polishing agent is used by mistake, the cutting force will be insufficient, which will greatly reduce the efficiency of rough grinding. For medium-mesh polishing blocks 12, lubricating-type polishing liquid containing micron-level aluminum oxide needs to be filled. The polishing liquid can further eliminate the grinding marks left by rough grinding and reduce the frictional resistance between the polishing blocks 12 and the stone, so as to avoid new scratches in the transition polishing stage. If a low-mesh cutting-type polishing agent is mixedly used, the surface roughness of the stone will be too high, which will increase the difficulty of subsequent fine grinding. For high-mesh polishing blocks 12, polishing-type polishing liquid containing nano-level chromium oxide needs to be filled. The fine particles can gradually improve the gloss of the stone carving surface through micro-cutting and surface filling. If a low-mesh coarse-particle polishing agent is used by mistake, fine scratches will be left on the surface of the stone, which cannot achieve the mirror effect. The device solves the problem of unstable polishing quality caused by mismatching of the polishing agent in the existing device through independent liquid storage and mesh number matching design.

[0040] ​When the device enters the polishing stage, and the switching assembly drives the target group of polishing blocks 12 to descend, the liquid spraying assembly will start synchronously with the polishing action: as the contact column 22 pushes the limiting seat 10 and the polishing block 12 to descend along the limiting sliding groove 11, the limiting rod 14 fixed symmetrically at the top of the limiting seat 10 will synchronously drive the auxiliary frame 15 to move downward; the piston rod 30 fixed vertically at the bottom of the auxiliary frame 15 moves downward with the auxiliary frame 15, and the piston end slides in the liquid collecting cylinder 31 and compresses the space in the cylinder, so that the pressure in the liquid collecting cylinder 31 rises, thereby the polishing agent suitable for the current polishing block 12 is flowed into the first stretchable pipe 33 through the one-way liquid outlet valve pipe 32 in the liquid collecting cylinder 31; the first stretchable pipe 33 has the telescopic feature, which can flexibly adjust the length according to the movement of the auxiliary frame 15, so as to avoid the pipeline from being pulled and broken, and finally the polishing agent is sprayed out through the nozzle pipe 34 connected with the first stretchable pipe 33, and is accurately sprayed on the surface of the current working polishing block 12, so as to realize the synchronous effect of polishing start and liquid supply, and the overall polishing effect is better.

[0041] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0042] Although the embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A floating polishing head for stone carving polishing process, comprising a polishing seat (1), a fixing seat (2) fixed to one side of the polishing seat (1), and a hollow shaft (3) vertically penetrating and rotatably mounted on one side of the polishing seat (1) via a bearing, characterized in that: The bottom end of the hollow shaft (3) is provided with a turntable (5). Several connecting brackets (4) are fixedly installed around the top edge of the turntable (5) at equal angles. The ends of the connecting brackets (4) away from the turntable (5) are fixedly installed on the outside of one side of the hollow shaft (3). Several sets of polishing components with different mesh sizes are arranged around the bottom end of the turntable (5). A switching component is provided inside the bottom end of the hollow shaft (3). A drive motor (7) is provided on one side of the top of the polishing seat (1). A circular hole (38) is opened through the middle of the turntable (5). Each polishing assembly includes two symmetrically arranged limiting seats (10), both of which are attached to the bottom surface of the turntable (5). Each limiting seat (10) has a limiting groove (11) inside its bottom end. A polishing block (12) is installed inside the limiting groove (11). A compression assembly and a liquid spraying assembly are provided on the turntable (5) near the top of each limiting seat (10). The switching assembly includes a cylinder (18) and a rotating frame (21). The cylinder (18) is vertically arranged inside the hollow shaft (3). The rotating frame (21) is horizontally arranged at the bottom of the output end of the cylinder (18). A support frame (17) is fixedly installed at the top of the cylinder (18). Both ends of the support frame (17) are fixedly installed on the inner wall of the hollow shaft (3). A positioning seat (19) is fixedly installed at the bottom output end of the cylinder (18). The compression assembly includes two limiting rods (14) and an auxiliary frame (15). The two limiting rods (14) are symmetrically fixedly installed on the outside of the top of the limiting seat (10). The tops of the two limiting rods (14) are slidably installed on the outside of the top of the turntable (5). The two ends of the auxiliary frame (15) are fixedly installed on the top of the limiting rods (14) on the corresponding sides. Each limiting rod (14) is fitted with a compression spring (16). The two ends of the compression spring (16) are fixedly installed on the top of the turntable (5) and the bottom of the auxiliary frame (15) respectively.

2. The floating polishing head for stone carving polishing process according to claim 1, characterized in that: The polishing seat (1) is fixedly mounted with a mounting base (6) on the side near the drive motor (7). The drive motor (7) is fixedly mounted on the top of the mounting base (6). The output end of the drive motor (7) is fixedly mounted with a drive gear (8). The hollow shaft (3) is fixedly mounted with a gear ring (9) through the outside of the drive gear (8). The gear ring (9) meshes with the drive gear (8).

3. A floating polishing head for stone carving polishing process according to claim 1, characterized in that: The limiting seat (10) has a limiting bolt (13) installed inside the side near the opening end of the limiting groove (11) with a through thread. The outer side of the limiting bolt (13) is in contact with one end of the polishing block (12).

4. A floating polishing head for stone carving polishing process according to claim 1, characterized in that: A rotating rod (20) is vertically and rotatably mounted on the bottom center of the positioning seat (19). The bottom end of the rotating rod (20) is fixedly connected to the top center of the rotating frame (21). Both ends of the rotating frame (21) are vertically fixed with abutting posts (22). Limiting rings (23) are fixedly fitted on the outer side of the abutting posts (22) near the top. A worm gear (28) is fixedly inserted through the outer side of the rotating rod (20) near the top. An abutting hole (39) is opened through the inner side of the limiting seat (10) near the abutting post (22), and the abutting hole (39) can be inserted and cooperated with the abutting post (22).

5. A floating polishing head for stone carving polishing process according to claim 4, characterized in that: Two positioning frames (24) are symmetrically fixed on the side of the positioning seat (19) near the worm wheel (28). A worm (25) is installed between the two positioning frames (24) and rotates through it. The worm (25) is meshed with the worm wheel (28). A ratchet (26) is fixedly installed at one end of the worm (25). A drive rack (27) is vertically fixed on the inner wall of the hollow shaft (3) near the ratchet (26).

6. A floating polishing head for stone carving polishing process according to claim 1, characterized in that: The spraying assembly includes a piston rod (30) and a collection cylinder (31). The piston rod (30) is vertically fixed at the bottom center of the auxiliary frame (15), and the collection cylinder (31) is vertically fixed at the top outside of the turntable (5). The piston end of the piston rod (30) is slidably sealed inside the collection cylinder (31), and two one-way drain valve pipes (32) are symmetrically fixed through the bottom of the collection cylinder (31).

7. A floating polishing head for stone carving polishing process according to claim 6, characterized in that: Each of the one-way drain valve pipes (32) has a first tension pipe (33) fixedly connected to its output end. Both sides of the bottom end of the limiting seat (10) are fixedly installed with nozzle pipes (34). The output end of the first tension pipe (33) is connected and fixedly connected to the input end of the nozzle pipe (34) on the corresponding side.

8. A floating polishing head for stone carving polishing process according to claim 6, characterized in that: One-way inlet valve pipe (35) is fixed through one side of the bottom end of the liquid collection cylinder (31). A second tension pipe (36) is fixed through the input end of the one-way inlet valve pipe (35). One end of the second tension pipe (36) is fixed through the bottom end of the liquid storage tank (37). The liquid storage tank (37) is fixedly installed on the outside of one side of the connecting frame (4). A sealing cap (40) is threadedly connected to the top of the liquid storage tank (37).

9. A pressure control device for a floating polishing head used in a stone carving polishing process as described in any one of claims 1-8, characterized in that, Includes a distance sensor (29), which is embedded and fixedly installed inside the bottom end of the contact post (22).

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