A grinding device for automotive parts processing

Abstract

This utility model relates to a grinding device for automotive parts processing, belonging to the technical field of grinding machine equipment. The device includes a frame, which is equipped with a loading and unloading assembly with a grinding box, a three-dimensional adjustable grinding assembly, a bidirectional clamping fixture assembly, and a water circulation assembly. The water circulation assembly uses nozzles for cooling and dust reduction, and wastewater is filtered and recycled after passing through a filter box. The wastewater also drives a cleaning brush to automatically clean the filter holes. This device achieves automated, precise grinding and green recycling processing, providing stable grinding quality, high efficiency, convenient maintenance, and compatibility with various parts, significantly reducing costs and pollution.

Description

Technical Field

[0001] This utility model belongs to the technical field of grinding machine equipment, specifically relating to a grinding device for automotive parts processing. Background Technology

[0002] Surface polishing of automotive parts (such as engine mounts, transmission housings, and precision bolts) is a crucial process for ensuring assembly accuracy, performance, and lifespan. Its processing quality directly impacts the overall reliability of the vehicle. As the automotive industry moves towards lightweighting and precision manufacturing, higher demands are being placed on the precision, efficiency, and environmental friendliness of parts polishing. However, existing automotive parts polishing equipment, limited by traditional design concepts and structures, suffers from numerous significant technical shortcomings in actual production, making it difficult to meet the high-quality requirements of modern mass production.

[0003] Metal dust (such as steel and aluminum alloy shavings) generated during the grinding process lacks effective collection and suppression measures, directly spreading into the workshop environment. This not only pollutes the production site but is also easily inhaled by operators, causing occupational health problems such as respiratory diseases. This does not comply with environmental protection regulations such as the "Integrated Emission Standard for Air Pollutants". To cool the grinding head and suppress dust, most equipment adopts an open water spray design, with clean water being discharged directly after single use. This results in insufficient water resource utilization and high operating costs. The few pieces of equipment equipped with filtration functions have filter plates that are easily clogged by metal shavings, requiring frequent manual disassembly and cleaning. Maintenance is required more than three times a week, with each maintenance taking more than one hour, seriously affecting production continuity. Utility Model Content

[0004] The purpose of this utility model is to provide a simple and reasonably designed grinding device for automotive parts processing in order to solve the above problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A grinding device for processing automotive parts includes a loading and unloading assembly, a grinding component movably mounted on the loading and unloading assembly, a clamping assembly that cooperates with the grinding component on the loading and unloading assembly, a water circulation assembly that cooperates with the grinding component and the clamping assembly respectively on the loading and unloading assembly, and a frame for mounting the grinding component.

[0007] The grinding assembly includes a grinding head movably mounted above the frame. The water circulation assembly includes a sewage circulation filter box. The bottom of the sewage circulation filter box is connected to a water storage tank. The top of the sewage circulation filter box is connected to a sewage pipe. The other end of the sewage pipe is connected to a grinding box slidably connected above the frame. The bottom of the inner wall of the grinding box is inclined.

[0008] The inner wall of the sewage circulation filter box is rotatably connected to a water wheel located below the sewage pipe. A filter plate is fixedly installed at the bottom of the inner wall of the sewage circulation filter box. Rotating rods located below the sewage pipe and above the filter plate are rotatably connected to the inner wall of the sewage circulation filter box. Pulleys are fixedly sleeved on the outer walls of the two rotating rods. A belt is sleeved between the two pulleys. The water wheel is sleeved on the outer wall of the rotating rod near the bottom of the sewage pipe. A reciprocating screw is fixedly connected to the other end of the other rotating rod. A slider is threaded on the outer wall of the reciprocating screw. A cleaning brush that mates with the filter holes of the filter plate is rotatably connected to the front and rear sides of the bottom of the slider.

[0009] As a further optimization of this utility model, the water circulation assembly includes a nozzle located on one side of the grinding head. The inlet end of the nozzle is connected to a liquid delivery pipe, and the other end of the liquid delivery pipe is connected to a liquid delivery pump. The input end of the liquid delivery pump is connected to a sewage circulation filter box through a liquid extraction pipe, and the liquid extraction pipe extends into the bottom of the sewage circulation filter box after filtration.

[0010] As a further optimization of this utility model, a feeding platform is fixedly installed on the top of the frame, and an adjusting block is fixedly installed in the middle of the top of the feeding platform. A first lead screw is rotatably connected to the inner side wall of the adjusting block, and a grinding box that is slidably connected to the adjusting block is threaded onto the outer side wall of the first lead screw. Limiting blocks are fixedly installed on both sides of the top of the feeding platform, and the bottom of the grinding box is slidably connected to the inner side wall of the two limiting blocks. A door is rotatably connected to the front side wall of the grinding box, and a first servo motor for driving the first lead screw to rotate is fixedly installed on the rear side wall of the adjusting block.

[0011] As a further optimization of this utility model, the clamping assembly includes a processing table fixedly installed at the bottom of the inner side wall of the grinding box, and a second cylinder is fixedly installed on both side walls of the grinding box. The output ends of the two second cylinders slide through the side walls of the grinding box and are fixedly connected to a clamping plate located above the processing table.

[0012] As a further optimization of this utility model, a gantry frame is fixedly installed on the top of the frame, a first electric slide assembly is fixedly installed on the top of the gantry frame, a second electric slide assembly is slidably connected to the first electric slide assembly, and a lifting assembly for driving the grinding head to rise and fall is slidably connected to the second electric slide assembly.

[0013] As a further optimization of this utility model, the first electric slide assembly includes a first adjusting seat fixedly installed on the top of the gantry frame, a second lead screw rotatably connected to the inner side wall of the first adjusting seat, a second servo motor for driving the second lead screw to rotate fixedly installed on the side wall of the first adjusting seat, and the second electric slide assembly threadedly sleeved on the outer side wall of the second lead screw.

[0014] As a further optimization of this utility model, the second electric slide assembly includes a second adjusting seat threadedly sleeved on the outer wall of the second lead screw, a third lead screw rotatably connected to the inner wall of the second adjusting seat, a third servo motor for driving the third lead screw to rotate fixedly installed on the rear wall of the second adjusting seat, and the lifting assembly threadedly sleeved on the outer wall of the third lead screw.

[0015] As a further optimization of this utility model, the lifting assembly includes a lifting adjustment seat with a third lead screw threaded onto the outer wall and slidably connected to the side wall of the second adjustment seat. A first cylinder is fixedly installed on the top of the lifting adjustment seat. The output end of the first cylinder slides through the inner wall of the lifting adjustment seat and is fixedly connected to a lifting seat that slides on the side wall of the lifting adjustment seat. A fourth servo motor is fixedly installed on the top of the lifting seat. The output end of the fourth servo motor rotates through the bottom of the lifting seat. The grinding head is fixedly connected to the bottom of the output end of the fourth servo motor. A mounting plate for mounting a nozzle is fixedly installed on the side wall of the lifting seat.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. In this invention, the nozzle of the liquid circulation component moves synchronously with the grinding head, precisely spraying clean water onto the grinding area. This cools the grinding head and accessories in real time while suppressing dust at its source, reducing dust concentration in the workshop and meeting occupational health and environmental protection standards. Secondly, wastewater is collected at the inclined bottom of the grinding box and flows into the wastewater circulation filter box through a wastewater pipe. After filtration by the filter plate, it is recycled, significantly saving water resources. Thirdly, during wastewater circulation, the water wheel uses the impact force of the wastewater to drive the cleaning brush to automatically clean the filter plate holes, preventing debris blockage and ensuring stable filtration. The filtered clean water can be reused for cooling and dust suppression, achieving a closed-loop cycle of "water use – wastewater – filtration – reuse," with no wastewater discharge, completely solving environmental problems.

[0018] 2. In this utility model, the first servo motor of the loading and unloading assembly drives the first lead screw, which drives the grinding box to slide precisely along the limit block, realizing the automatic transportation of the workpiece to the grinding station and reset unloading. No manual handling is required. The three-dimensional electric slide assembly can preset the grinding path and automatically complete the grinding of each part of the accessory without manual intervention or adjustment. The entire process of "loading-clamping-grinding-cooling-unloading" is integrated and linked, with seamless connection between each link and stable production rhythm. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This utility model Figure 1 A schematic diagram of the side view structure;

[0021] Figure 3 This is a schematic diagram of the first partial structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the second partial structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the internal structure of the wastewater circulation filter box of this utility model.

[0024] In the diagram: 1. Loading / unloading assembly; 101. Frame; 102. Feeding table; 103. Adjusting block; 104. Limit block; 105. Grinding box; 106. First servo motor; 107. First lead screw; 108. Box door; 2. Grinding assembly; 201. Gantry frame; 202. First adjusting seat; 203. Second servo motor; 204. Second lead screw; 205. Second adjusting seat; 206. Third servo motor; 207. Lifting adjusting seat; 208. First cylinder; 209. Third lead screw; 210. Lifting seat; 211. Fourth servo motor; 212. Grinding head; 3. Water circulation assembly; 301. Sewage pipe; 302. Sewage circulation filter box; 3021. Water wheel; 3022. Belt; 3023. Pulley; 3024. Reciprocating screw; 3025. Slider; 3026. Hole cleaning brush; 3027. Filter plate; 303. Liquid delivery pipe; 304. Liquid delivery pump; 305. Water storage tank; 306. Nozzle; 307. Mounting plate; 4. Fixture assembly; 401. Machining table; 402. Second cylinder; 403. Clamping plate. Detailed Implementation

[0025] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0026] Example 1: As Figure 1 - Figure 4 As shown, a grinding device for automotive parts processing includes a loading and unloading assembly 1, a grinding assembly 2, a water circulation assembly 3, and a clamping assembly 4. The loading and unloading assembly 1 serves as the overall load-bearing and workpiece conveying foundation, the grinding assembly 2 enables multi-dimensional precision grinding of parts, the clamping assembly 4 completes the positioning and clamping of workpieces, and the water circulation assembly 3 provides grinding cooling, dust reduction, and wastewater recycling and filtration, forming a complete operation system of "loading - clamping - grinding - cooling - wastewater circulation".

[0027] like Figure 1 and Figure 3As shown, the loading and unloading assembly 1 includes a frame 101, a feeding table 102, an adjusting block 103, a limiting block 104, a grinding box 105, a first servo motor 106, a first lead screw 107, and a door 108. The frame 101 is an integral load-bearing structure, with the feeding table 102 fixedly installed on the top. The adjusting block 103 is fixedly installed in the middle of the top of the feeding table 102, the first lead screw 107 is rotatably connected to its inner side wall, and the first servo motor 106 is fixedly installed on its rear side wall. The output end of the first servo motor 106 is connected to the first lead screw 107. The grinding box 105 is threaded onto the outer side wall of the first lead screw 107 and slidably connected to the bottom of the grinding box 105. The inner walls of the limiting blocks 104 on both sides of the top of the feeding table 102; the front wall of the grinding box 105 is rotatably connected to the box door 108, and the bottom of the inner wall is inclined. When the box door 108 is opened, the car parts are placed into the grinding box 105. After the box door is closed, the first servo motor 106 drives the first lead screw 107 to rotate, which drives the grinding box 105 to slide along the inner wall of the limiting blocks 104, accurately conveying the workpiece to the bottom of the grinding assembly 2. After grinding, the first servo motor 106 drives the grinding box 105 to reset, which is convenient for picking up and putting down the workpiece. The inclined bottom of the grinding box facilitates the collection of sewage and its flow to the sewage pipe 301, avoiding liquid residue.

[0028] like Figure 1 and Figure 4 As shown, the fixture assembly 4 includes a processing table 401, a second cylinder 402, and a clamping plate 403. The processing table 401 is fixedly installed on the bottom of the inner side wall of the grinding box 105. The second cylinder 402 is fixedly installed on both side walls of the grinding box 105. The output end of the second cylinder 402 passes through the side wall of the grinding box 105 and is fixedly connected to the clamping plate 403. The clamping plate 403 is located above the processing table 401. After the automotive parts are placed on the processing table 401, the second cylinder 402 is activated, and the output end pushes the clamping plates 403 on both sides to move relative to each other, applying clamping force from both sides of the parts to achieve precise positioning and fixation of the workpiece, avoiding grinding deviation caused by workpiece displacement during grinding. After grinding is completed, the second cylinder 402 drives the clamping plate 403 to reset and release the workpiece.

[0029] like Figure 1 - Figure 3As shown, the grinding assembly 2 includes a gantry frame 201, a first electric slide assembly, a second electric slide assembly, a lifting assembly, and a grinding head 212. The gantry frame 201 is fixedly installed on the top of the frame 101. The first electric slide assembly includes a first adjusting seat 202, a second lead screw 204, and a second servo motor 203. The first adjusting seat 202 is fixed to the top of the gantry frame 201, and the second lead screw 204 is rotatably connected to its inner side wall. The second servo motor 203 is fixedly installed on its side wall, and its output end is connected to the second lead screw 204. The second electric slide... The components include a second adjusting seat 205, a third lead screw 209, and a third servo motor 206. The second adjusting seat 205 is threaded onto the outer wall of the second lead screw 204, and the inner wall is rotatably connected to the third lead screw 209. The third servo motor 206 is fixedly installed on the rear wall, and its output end is connected to the third lead screw 209. The lifting assembly includes a lifting adjusting seat 207, a first cylinder 208, a lifting seat 210, and a fourth servo motor 211. The lifting adjusting seat 207 is threaded onto and slidably connected to the side wall of the second adjusting seat 205, and its top is fixed. A first cylinder 208 is installed, with its output end passing through a lifting adjustment seat 207 and fixedly connected to a lifting seat 210. A fourth servo motor 211 is fixedly installed on the top of the lifting seat 210, with its output end passing through the bottom of the lifting seat 210 and fixedly connected to a grinding head 212. A mounting plate 307 is fixedly installed on the side wall of the lifting seat 210. A second servo motor 203 drives a second lead screw 204 to rotate, causing a second adjustment seat 205 to slide laterally along the first adjustment seat 202. A third servo motor 206 drives a third lead screw 209 to rotate. The lifting adjustment seat 207 slides longitudinally along the second adjustment seat 205; the first cylinder 208 drives the lifting seat 210 to move up and down, realizing the precise position adjustment of the grinding head 212 in three-dimensional space, adapting to the grinding needs of automotive parts of different sizes and shapes; the fourth servo motor 211 starts, driving the grinding head 212 to rotate at high speed, and through the contact friction between the rotating grinding head and the surface of the part, the grinding operations such as burr removal and surface polishing are realized; the three-dimensional adjustment combined with the rotational grinding ensures that all parts of the part are ground evenly, improving the grinding accuracy.

[0030] like Figure 1 , Figure 4 and Figure 5As shown, the water circulation assembly 3 includes a sewage pipe 301, a sewage circulation filter box 302, a liquid delivery pipe 303, a liquid delivery pump 304, a water storage tank 305, a nozzle 306, a mounting plate 307, a water wheel 3021, a belt 3022, a pulley 3023, a reciprocating screw 3024, a slider 3025, a cleaning brush 3026, and a filter plate 3027. The sewage circulation filter box 302 is fixedly installed on the frame 101, with its top connected to the grinding box 105 via the sewage pipe 301, and its bottom connected to the water storage tank 305. The inner wall is rotatably connected to the water wheel 3021, located below the sewage pipe 301, with two... Rotating rods are respectively located below the sewage pipe and above the filter plate. A pulley 3023 is fitted onto the outer wall of the rotating rod, and a belt 3022 is fitted onto the outside of the two pulleys 3023. A water wheel 3021 is fixedly fitted onto the rotating rod near the sewage pipe. The other end of the other rotating rod is fixedly connected to a reciprocating screw 3024, and a slider 3025 is threaded onto the outside of the reciprocating screw 3024. A cleaning brush 3026 is rotatably connected to the bottom front and rear sides. The filter plate 3027 is fixed to the bottom of the inner wall of the sewage circulation filter box 302, and the cleaning brush 3026 mates with the filter holes of the filter plate 3027. A nozzle 306 is mounted on the mounting plate 307. The inlet end is connected to the delivery pump 304 via the delivery pipe 303. The input end of the delivery pump 304 is connected to the bottom of the wastewater circulation filter box 302 via the suction pipe. The suction pipe extends into the bottom of the filtered end of the wastewater circulation filter box 302. When the delivery pump 304 starts, it draws out the clean water from the wastewater circulation filter box 302 and delivers it to the nozzle 306 via the delivery pipe 303. The nozzle 306 sprays clean water onto the grinding head 212 and the grinding parts of the accessories, which cools the grinding head and accessories, suppresses dust, and washes away the grinding debris. The wastewater carrying the debris collects at the bottom of the grinding box 105. The wastewater flows into the wastewater circulation filter box 302 through the wastewater pipe 301. The water wheel 3021 is eccentrically positioned on the wastewater pipe 301 to ensure that the wastewater can impact the blades of the water wheel 3021 to make it rotate. The water wheel 3021 drives the reciprocating screw 3024 to rotate through the rotating rod, pulley 3023 and belt 3022, which drives the slider 3025 to move laterally. The cleaning brush 3026 moves and rotates with the slider to clean the filter holes of the filter plate 3027 to prevent debris from clogging. The filter plate 3027 filters debris from the wastewater, and the filtered clean water flows into the water storage tank 305, realizing water recycling and saving water resources.

[0031] It should be noted that, in use, the grinding device for processing automotive parts is operated by opening the door 108 of the grinding box 105, placing the automotive parts on the processing table 401, starting the second cylinder 402, and driving the clamping plate 403 to clamp the workpiece; closing the door 108, the first servo motor 106 drives the grinding box 105 to move to the grinding station.

[0032] Multi-dimensional positioning grinding: Start the second and third servo motors 203 and 206 and the first cylinder 208, and adjust the grinding head 212 to the position of the part to be ground; start the fourth servo motor 211 to drive the grinding head 212 to rotate and grind, and at the same time, achieve uniform grinding of the entire surface of the part through multi-dimensional adjustment.

[0033] Cooling and wastewater circulation: During the grinding process, the liquid delivery pump 304 is started, and the nozzle 306 sprays clean water to cool and reduce dust; wastewater flows into the wastewater circulation filter box 302 through the wastewater pipe 301, and after being filtered by the filter plate 3027 and cleaned by the hole cleaning brush 3026, the clean water is recycled.

[0034] Material unloading and resetting: After grinding is completed, the grinding head 212 and the nozzle 306 stop working, the second cylinder 402 drives the clamping plate 403 to reset; the first servo motor 106 drives the grinding box 105 to reset, the box door 108 is opened to take out the parts, and the next round of operation begins.

[0035] The above-described embodiments are merely examples of several implementations of this utility model. The descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. An automobile accessory machining accessory polishing device, comprising a feeding and discharging assembly (1), a polishing assembly (2) is movably arranged on the feeding and discharging assembly (1), characterized in that: The loading and unloading assembly (1) is provided with a clamp assembly (4) that cooperates with the grinding assembly (2). The loading and unloading assembly (1) is provided with a water circulation assembly (3) that cooperates with the grinding assembly (2) and the clamp assembly (4) respectively. The loading and unloading assembly (1) includes a frame (101) for mounting the grinding assembly (2). The grinding assembly (2) includes a grinding head (212) movably mounted above the frame (101). The water circulation assembly (3) includes a sewage circulation filter box (302). The bottom of the sewage circulation filter box (302) is connected to a water storage tank (305). The top of the sewage circulation filter box (302) is connected to a sewage pipe (301). The other end of the sewage pipe (301) is connected to a grinding box (105) slidably connected above the frame (101). The bottom of the inner wall of the grinding box (105) is inclined. The inner wall of the wastewater circulation filter box (302) is rotatably connected to a water wheel (3021) located below the wastewater pipe (301). A filter plate (3027) is fixedly installed at the bottom of the inner wall of the wastewater circulation filter box (302). Rotating rods are rotatably connected to the inner wall of the wastewater circulation filter box (302), respectively located below the wastewater pipe (301) and above the filter plate (3027). Pulleys (3023) are fixedly fitted onto the outer walls of both rotating rods. A belt (3022) is fitted between the pulleys (3023). The water wheel (3021) is fixedly fitted on the outer wall of the rotating rod below the sewage pipe (301). The other end of the rotating rod is fixedly connected to a reciprocating screw (3024). A slider (3025) is threadedly fitted on the outer wall of the reciprocating screw (3024). A cleaning brush (3026) that cooperates with the filter holes of the filter plate (3027) is rotatably connected to the front and rear sides of the bottom of the slider (3025).

2. The accessory polishing device for processing of automobile accessories as claimed in claim 1, wherein: The water circulation assembly (3) includes a nozzle (306) located on one side of the grinding head (212). The inlet end of the nozzle (306) is connected to a liquid delivery pipe (303), and the other end of the liquid delivery pipe (303) is connected to a liquid delivery pump (304). The input end of the liquid delivery pump (304) is connected to a sewage circulation filter box (302) through a liquid extraction pipe. The liquid extraction pipe extends into the bottom of the sewage circulation filter box (302) after filtration.

3. The device as claimed in claim 1, wherein: A feeding platform (102) is fixedly installed on the top of the frame (101). An adjusting block (103) is fixedly installed in the middle of the top of the feeding platform (102). A first lead screw (107) is rotatably connected to the inner side wall of the adjusting block (103). A grinding box (105) is threadedly fitted on the outer side wall of the first lead screw (107) and slidably connected to the adjusting block (103). Limiting blocks (104) are fixedly installed on both sides of the top of the feeding platform (102). The bottom of the grinding box (105) is slidably connected to the inner side wall of the two limiting blocks (104). A box door (108) is rotatably connected to the front side wall of the grinding box (105). A first servo motor (106) for driving the first lead screw (107) to rotate is fixedly installed on the rear side wall of the adjusting block (103).

4. The device as claimed in claim 3, wherein: The fixture assembly (4) includes a processing table (401) fixedly installed on the bottom of the inner side wall of the grinding box (105). A second cylinder (402) is fixedly installed on both sides of the grinding box (105). The output ends of the two second cylinders (402) slide through the two sides of the grinding box (105) and are fixedly connected to a clamping plate (403) located above the processing table (401).

5. The grinding device for automotive parts processing according to claim 2, characterized in that: A gantry frame (201) is fixedly installed on the top of the frame (101), and a first electric slide assembly is fixedly installed on the top of the gantry frame (201). A second electric slide assembly is slidably connected to the first electric slide assembly, and a lifting assembly for driving the grinding head (212) to rise and fall is slidably connected to the second electric slide assembly.

6. The grinding device for automotive parts processing according to claim 5, characterized in that: The first electric slide assembly includes a first adjusting seat (202) fixedly installed on the top of the gantry (201), a second lead screw (204) rotatably connected to the inner side wall of the first adjusting seat (202), a second servo motor (203) for driving the second lead screw (204) to rotate fixedly installed on the side wall of the first adjusting seat (202), and the second electric slide assembly is threaded onto the outer side wall of the second lead screw (204).

7. The grinding device for automotive parts processing according to claim 6, characterized in that: The second electric slide assembly includes a second adjusting seat (205) threadedly sleeved on the outer side wall of the second lead screw (204), a third lead screw (209) rotatably connected to the inner side wall of the second adjusting seat (205), and a third servo motor (206) for driving the third lead screw (209) to rotate is fixedly installed on the rear side wall of the second adjusting seat (205). The lifting assembly is threadedly sleeved on the outer side wall of the third lead screw (209).

8. The grinding device for automotive parts processing according to claim 7, characterized in that: The lifting assembly includes a lifting adjustment seat (207) with a threaded sleeve on the outer wall of the third lead screw (209) and slidably connected to the side wall of the second adjustment seat (205). A first cylinder (208) is fixedly installed on the top of the lifting adjustment seat (207). The output end of the first cylinder (208) slides through the inner wall of the lifting adjustment seat (207) and is fixedly connected to a lifting seat (210) that slides on the side wall of the lifting adjustment seat (207). A fourth servo motor (211) is fixedly installed on the top of the lifting seat (210). The output end of the fourth servo motor (211) rotates through the bottom of the lifting seat (210). The grinding head (212) is fixedly connected to the bottom of the output end of the fourth servo motor (211). A mounting plate (307) for mounting a nozzle (306) is fixedly installed on the side wall of the lifting seat (210).

Images