Fine grinding device for finish degree of cambered surface of welded pipe mold

Abstract

The invention belongs to the technical field of grinding equipment, and particularly relates to a welded pipe mold cambered surface smoothness accurate grinding device which comprises a workbench, a fixing assembly is arranged on one side of the upper end of the workbench and comprises two first circular plates arranged at the upper end of the workbench in a sliding mode, and an accurate grinding assembly is arranged on one side of the fixing assembly. The accurate grinding assembly comprises an arc-shaped plate slidably arranged at the upper end of the workbench, the side, close to the first circular plate, of the arc-shaped plate is wrapped with abrasive paper, second rectangular strips are rotatably arranged at the two ends of the side, away from the abrasive paper, of the arc-shaped plate, and a third rectangular strip is arranged between the second rectangular strips. A fourth rectangular strip is fixedly connected to the end, away from the arc-shaped plate, of the third rectangular strip, a second rectangular hole is formed in the position, corresponding to the third rectangular strip, of the fourth rectangular strip, and the third rectangular strip is slidably arranged in the second rectangular hole. And the practicability is low.

Description

Technical Field

[0001] The present invention belongs to the technical field of grinding equipment, and specifically relates to a fine grinding device for the arc surface finish of a welded pipe die. Background Art

[0002] The welded pipe die positions the preliminarily formed steel pipe during the welding process of the steel pipe. The middle arc surface of the welded pipe die positions and forms the outer wall of the steel pipe. The roughness grade requirements of the middle arc surface of the existing welded pipe die are relatively high, and fine grinding processing is often required.

[0003] A patent application with the publication number CN115008275B discloses a fine grinding device for the arc surface finish of a welded pipe die. The outer surface of the grinding disc matches the middle arc surface of the welded pipe die, and the rotating grinding disc drives the welded pipe die to rotate relative to the machine frame under the frictional force between the grinding disc and the welded pipe die, and the rotating speed of the welded pipe die is less than the rotating speed of the grinding disc relative to the machine frame, thereby realizing the grinding processing of the annular middle arc surface and improving the processing efficiency. Further, the grinding accuracy is increased through the setting of the pressure detection component.

[0004] When fine grinding the arc surface of the welded pipe die in the prior art, due to the different depths and lengths of the arc surfaces of different welding dies, it is impossible to adjust the shape of the grinding tool according to the arc surface of different depths during grinding, and the practicability is relatively low.

[0005] Therefore, the present invention provides a fine grinding device for the arc surface finish of a welded pipe die. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: A fine grinding device for the arc surface finish of a welded pipe die according to the present invention includes a workbench. One side of the upper end of the workbench is provided with a fixing component. The fixing component includes two first circular plates slidably arranged on the upper end of the workbench. One side of the fixing component is provided with a fine grinding component. The fine grinding component includes an arc-shaped plate slidably arranged on the upper end of the workbench. The side of the arc-shaped plate close to the first circular plate is wrapped with sandpaper. Two ends of the side of the arc-shaped plate away from the sandpaper are rotatably provided with second rectangular bars. A third rectangular bar is arranged between the second rectangular bars. The third rectangular bar is fixedly connected to the middle of the arc-shaped plate. One end of the third rectangular bar away from the arc-shaped plate is fixedly connected to a fourth rectangular bar. A second rectangular hole is arranged at the position of the fourth rectangular bar corresponding to the third rectangular bar. The third rectangular bar is slidably arranged in the second rectangular hole.

[0008] Preferably, rectangular cylinders are fixedly connected to both sides of the second rectangular strip. First rectangular strips are respectively arranged at the upper and lower ends of the rectangular cylinder. A first cylindrical rod is rotatably arranged between two opposite first rectangular strips. A roll of sandpaper is installed on the outer side of the first cylindrical rod at the upper end. The end of the roll of sandpaper is pulled out and installed on the outer side of the first cylindrical rod at the lower end.

[0009] Preferably, the first rectangular strips are respectively slidably arranged inside the two ends of the rectangular cylinder, and the first rectangular strips are respectively fixedly connected to the inside of the rectangular cylinder through first springs.

[0010] Preferably, two groups of cylindrical wheels are respectively rotatably arranged at both ends of the arc-shaped plate. One group of cylindrical wheels includes cylindrical wheels respectively arranged on both sides of the sandpaper, and the cylindrical wheels clamp the sandpaper.

[0011] Preferably, third cylindrical rods are respectively fixedly connected to one side of the fourth rectangular strips, second cylindrical rods are respectively fixedly connected to one side of the rectangular cylinders. A support plate is fixedly connected to the lower ends of the third cylindrical rod and the second cylindrical rod. A fourth electric slide rail is fixedly connected to the upper end of the workbench corresponding to the position of the support plate. A third electric slide rail is slidably arranged on the upper end of the fourth electric slide rail. The support plate is slidably arranged on the upper end of the third electric slide rail.

[0012] Preferably, first rectangular holes are respectively formed in the middle parts of the third rectangular strips. Third rectangular holes are respectively formed in the fourth rectangular strips corresponding to the positions of the first rectangular holes. The third rectangular holes are perpendicular to the second rectangular holes. First rectangular sliders are jointly slidably arranged inside the adjacent first rectangular holes and third rectangular holes. Fixing components are respectively arranged in the middle parts of two adjacent first rectangular sliders. The fixing component includes a first special-shaped rod fixedly connected between the two first rectangular sliders. Screws are slidably arranged on the outer sides of both ends of the first special-shaped rod. Rings are respectively fixedly connected to one ends of the screws close to the fourth rectangular strip. A first cylindrical tube is commonly threadedly connected to the outer sides of the opposite ends of the screws.

[0013] Preferably, first sprockets are respectively fixedly connected to the outer sides of the middle parts of the first cylindrical tubes. Rectangular grooves are respectively formed in the opposite sides of the second rectangular strips. A fourth cylindrical rod is arranged between the second rectangular strips. Both ends of the fourth cylindrical rod are slidably arranged in the rectangular grooves through second rectangular sliders. The second rectangular sliders are fixedly connected to one side of the inside of the rectangular grooves through second springs. A second sprocket is fixedly connected to the outer side of the middle part of the fourth cylindrical rod. The first sprocket and the second sprocket are driven by a chain.

[0014] Preferably, fixing rods are respectively fixedly connected to the upper and lower ends of the two fourth rectangular strips. A rectangular plate is slidably arranged on the outer sides of two opposite third rectangular strips. A first electric slide rail is arranged on one side of the two rectangular plates. The first electric slide rail is fixedly connected to the fixing rod through a fixing block. The rectangular plate is slidably arranged on one side of the first electric slide rail.

[0015] Preferably, a number of clamping blocks are slidably arranged around the opposite sides of the first circular plate. A second circular plate is rotatably arranged on the side of the first circular plate away from the clamping blocks. A first rectangular block is fixedly connected to one side of the second circular plate. A second electric slide rail is arranged on one side of the first rectangular block, and the second electric slide rail is fixedly connected to the upper end of the workbench. The first rectangular block is slidably arranged on one side of the second electric slide rail.

[0016] Preferably, second rectangular blocks are fixedly connected to the upper and lower ends of the second electric slide rail close to the first circular plate. Second cylinders are rotatably penetrated through the middle parts of the second circular plates respectively, and the second cylinders are fixedly connected to the first circular plate respectively. A second special-shaped rod is slidably arranged inside one end of the second cylinder away from the first circular plate, and one end of the second special-shaped rod away from the second cylinder is rotatably arranged on one side of the second rectangular block. The second special-shaped rod at the lower end penetrates through the second rectangular block and is fixedly connected to the output end of the motor, and the motor is installed inside the workbench.

[0017] The beneficial effects of the present invention are as follows: 1. For the arc surface finish fine grinding device of a welded pipe mold of the present invention, by driving the third rectangular strip to slide in the second rectangular hole, and at the same time driving the first rectangular slider to slide inside the first rectangular hole and the third rectangular hole, the arc-shaped plate can be adjusted to completely fit the arc surface of the welding mold. Subsequently, sandpaper is wrapped on the surface of the arc-shaped plate, and then the arc surface of the welding mold can be polished. It can be adjusted according to the welding mold with arc surfaces of different depths, solving the problem that the shape of the grinding tool cannot be adjusted for welding molds with arc surfaces of different depths during grinding, and the practicality is relatively low. It can be applied to welding molds of different sizes, improving the practicality.

[0018] 2. For the arc surface finish fine grinding device of a welded pipe mold of the present invention, by installing a roll of sandpaper on the outer side of the first cylindrical rod, and then pulling out the end of the sandpaper and fixing it on the outer side of the lower first cylindrical rod, so that the sandpaper is wrapped on the outer side of the arc-shaped plate. When the sandpaper needs to be replaced, drive the lower first cylindrical rod to rotate to wind the used sandpaper on the outer side of the first cylindrical rod, and at the same time pull out the roll of sandpaper, so that the new sandpaper is wrapped on the outer side of the arc-shaped plate, and the replacement of the sandpaper is relatively convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 is a perspective view of Embodiment 1 of the present invention; Figure 2 is a schematic diagram of the position of the arc-shaped plate; Figure 3 is a schematic diagram of the structure of the fixing component; Figure 4 is a schematic diagram of the position of the sandpaper; Figure 5 It is a schematic diagram of the position of the cylindrical wheel; Figure 6 It is a schematic diagram of the structure of the fourth rectangular bar; Figure 7 It is a schematic diagram of the structure of the third rectangular bar; Figure 8 It is a schematic diagram of the position of the first rectangular slider; Figure 9 It is a schematic diagram of the position of the first cylinder; In the figure: 1. Arc-shaped plate; 11. Sandpaper; 111. First cylindrical rod; 112. First rectangular bar; 113. Rectangular cylinder; 114. First spring; 115. Second cylindrical rod; 12. Second rectangular bar; 121. Rectangular groove; 13. Third rectangular bar; 131. First rectangular hole; 14. Fourth rectangular bar; 141. Second rectangular hole; 142. Third rectangular hole; 143. Fixed rod; 144. Third cylindrical rod; 15. Cylindrical wheel; 16. First rectangular slider; 161. First special-shaped rod; 162. Lead screw; 1621. Ring; 163. First cylinder; 17. First sprocket; 171. Chain; 18. Fourth cylindrical rod; 181. Second sprocket; 182. Second rectangular slider; 183. Second spring; 19. Rectangular plate; 191. First electric slide rail; 192. Fixed block; 2. First circular plate; 21. Clamping block; 22. Second circular plate; 221. First rectangular block; 23. Second electric slide rail; 24. Second cylinder; 241. Second special-shaped rod; 25. Second rectangular block; 26. Motor; 3. Support plate; 31. Third electric slide rail; 32. Fourth electric slide rail; 4. Workbench. Specific embodiments

[0021] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0022] Embodiment 1: As Figures 1-4 shown, a device for precisely grinding the arc surface finish of a welded pipe mold according to an embodiment of the present invention includes a workbench 4. One side of the upper end of the workbench 4 is provided with a fixing assembly. The fixing assembly includes two first circular plates 2 slidably arranged on the upper end of the workbench 4. One side of the fixing assembly is provided with a precision grinding assembly. The precision grinding assembly includes an arc-shaped plate 1 slidably arranged on the upper end of the workbench 4. The side of the arc-shaped plate 1 close to the first circular plate 2 is wrapped with sandpaper 11. At both ends of the side of the arc-shaped plate 1 away from the sandpaper 11, second rectangular bars 12 are rotatably arranged. A third rectangular bar 13 is arranged between the second rectangular bars 12. The third rectangular bar 13 is fixedly connected to the middle of the arc-shaped plate 1. One end of the third rectangular bar 13 away from the arc-shaped plate 1 is fixedly connected to a fourth rectangular bar 14. The fourth rectangular bar 14 is provided with a second rectangular hole 141 at a position corresponding to the third rectangular bar 13. The third rectangular bar 13 is slidably arranged in the second rectangular hole 141.

[0023] Specifically, when the prior art performs fine grinding on the arc surface of the welded pipe die, due to the different depths and lengths of the arc surfaces of different welding dies, it is impossible to adjust the shape of the grinding tool for welding dies with arc surfaces of different depths during grinding, and the practicability is relatively low. When using this fine grinding device, place the welding die between the two first circular plates 2. The arc-shaped plate 1 is made of flexible metal material. Then, drive the third rectangular bar 13 to slide in the second rectangular hole 141, thereby adjusting the shape of the arc-shaped plate 1 to make the arc-shaped plate 1 conform to the shape of the arc surface of the welding die. After the adjustment is completed, wrap the sandpaper 11 around the outside of the arc-shaped plate 1. Then, drive the arc-shaped plate 1 to drive the sandpaper 11 to slide to one side of the arc surface of the welding die, so that the sandpaper 11 is closely attached to one side of the arc surface of the welding die. Then, drive the first circular plate 2 to drive the welding die to rotate, and the periphery of the arc surface of the welding die can be ground. By driving the third rectangular bar 13 to slide in the second rectangular hole 141, the shape of the arc-shaped plate 1 is adjusted to make the arc-shaped plate 1 conform to the shape of the arc surface of the welding die, solving the problem that it is impossible to adjust the shape of the grinding tool for welding dies with arc surfaces of different depths during grinding and the relatively low practicability. It can be applied to welding dies of different sizes and improves the practicability.

[0024] As Figure 4 shown, rectangular cylinders 113 are fixedly connected to both sides of the second rectangular bar 12. First rectangular bars 112 are respectively arranged at the upper and lower ends of the rectangular cylinder 113. A first cylindrical rod 111 is rotatably arranged between the two opposite first rectangular bars 112. A roll of sandpaper 11 is installed on the outside of the first cylindrical rod 111 at the upper end, and the end of the roll of sandpaper 11 is pulled out and installed on the outside of the first cylindrical rod 111 at the lower end.

[0025] Specifically, by installing a roll of sandpaper 11 on the outside of the first cylindrical rod 111, and then pulling out the end of the sandpaper 11 and fixing it on the outside of the first cylindrical rod 111 at the lower end, the sandpaper 11 is wrapped around the outside of the arc-shaped plate 1. When the sandpaper 11 needs to be replaced, drive the first cylindrical rod 111 at the lower end to rotate to wind the used sandpaper 11 around the outside of the first cylindrical rod 111, and at the same time pull out the roll of sandpaper 11, so that the new sandpaper 11 is wrapped around the outside of the arc-shaped plate 1, and the replacement of the sandpaper 11 is relatively convenient.

[0026] As Figure 4 shown, the first rectangular bars 112 are respectively slidably arranged inside the two ends of the rectangular cylinder 113, and the first rectangular bars 112 are respectively fixedly connected to the inside of the rectangular cylinder 113 through first springs 114.

[0027] Specifically, when adjusting the radian of the arc-shaped plate 1, the arc-shaped plate 1 simultaneously drives the sandpaper 11 to be adjusted. When the sandpaper 11 is adjusted, the distance between the two first cylindrical rods 111 is adjusted at the same time. When adjusting the distance between the two first cylindrical rods 111, the sandpaper 11 wrapped on one side of the arc-shaped plate 1 will become loose and cannot be tightly attached to one side of the arc-shaped plate 1. By arranging the first rectangular strip 112 in the rectangular cylinder 113, when adjusting the radian of the arc-shaped plate 1 and the sandpaper 11, the first cylindrical rod 111 slides inside the rectangular cylinder 113 through the first rectangular strip 112, and the elastic force of the first spring 114 supports the first rectangular strip 112 to keep the first cylindrical rod 111 stationary, preventing the sandpaper 11 on one side of the arc-shaped plate 1 from becoming loose.

[0028] As Figure 5 shown, two groups of cylindrical wheels 15 are respectively rotatably arranged at both ends of the arc-shaped plate 1. One group of cylindrical wheels 15 includes cylindrical wheels 15 respectively arranged on both sides of the sandpaper 11, and the cylindrical wheels 15 clamp the sandpaper 11.

[0029] Specifically, by arranging the cylindrical wheels 15 at both ends of the arc-shaped plate 1 to clamp the sandpaper 11, when adjusting the arc shape of the arc-shaped plate 1, the sandpaper 11 is always tightly attached to one side of the arc-shaped plate 1.

[0030] As Figure 2 shown, third cylindrical rods 144 are respectively fixedly connected to one side of the fourth rectangular strip 14, second cylindrical rods 115 are respectively fixedly connected to one side of the rectangular cylinder 113, a support plate 3 is fixedly connected to the lower ends of the third cylindrical rods 144 and the second cylindrical rods 115 together, and a fourth electric slide rail 32 is fixedly connected to the upper end of the workbench 4 corresponding to the position of the support plate 3. A third electric slide rail 31 is slidably arranged on the upper end of the fourth electric slide rail 32, and the support plate 3 is slidably arranged on the upper end of the third electric slide rail 31.

[0031] Specifically, by driving the third electric slide rail 31 to slide on the upper end of the fourth electric slide rail 32 towards the side close to the first circular plate 2, the arc-shaped plate 1 drives the sandpaper 11 to contact the arc surface side of the welding die. Subsequently, by driving the first circular plate 2 to drive the welding die to rotate, the arc surface of the welding die can be polished. By driving the support plate 3 to slide on the upper end of the third electric slide rail 31 and driving the sandpaper 11 to move through the arc-shaped plate 1, the utilization rate of the sandpaper 11 can be increased.

[0032] As Figure 8As shown, first rectangular holes 131 are respectively formed in the middle parts of the third rectangular strips 13. Third rectangular holes 142 are respectively formed in the fourth rectangular strips 14 at positions corresponding to the first rectangular holes 131. The third rectangular holes 142 are vertically arranged with respect to the second rectangular holes 141. First rectangular sliders 16 are slidably arranged inside the adjacent first rectangular holes 131 and third rectangular holes 142. Fixing components are respectively arranged in the middle parts of two adjacent first rectangular sliders 16. The fixing components include first special-shaped rods 161 fixedly connected between the two first rectangular sliders 16. Lead screws 162 are slidably arranged on the outer sides of the two ends of the first special-shaped rods 161. Rings 1621 are respectively fixedly connected to one ends of the lead screws 162 close to the fourth rectangular strips 14. A first cylinder 163 is commonly threadedly connected to the outer sides of the opposite ends of the lead screws 162.

[0033] Specifically, when adjusting the shape of the arc-shaped plate 1, the arc-shaped plate 1 can be first moved to one side of the arc surface of the welding mold, so that the arc-shaped plate 1 is completely attached to one side of the arc surface of the welding mold. At the same time, the third rectangular strip 13 slides in the second rectangular hole 141, and at the same time, the first rectangular slider 16 slides inside the first rectangular hole 131 and the third rectangular hole 142. After the arc-shaped plate 1 is adjusted to be completely attached to the arc surface of the welding mold, then drive the first cylinder 163 to rotate. When the first cylinder 163 rotates, it drives the lead screws 162 to move towards one side close to the fourth rectangular strip 14. The lead screws 162 drive the rings 1621 to closely adhere to one side of the fourth rectangular strip 14, fixing the third rectangular strip 13 and the fourth rectangular strip 14, so that the shape of the arc-shaped plate 1 is kept fixed, making the force on each contact point between the sandpaper 11 and the arc surface of the welding mold uniform during grinding. When replacing the sandpaper 11, the shape of the arc-shaped plate 1 remains unchanged without repeated adjustment.

[0034] As Figure 8 shown, first sprockets 17 are respectively fixedly connected to the outer sides of the middle parts of the first cylinders 163. Rectangular grooves 121 are respectively formed in the opposite sides of the second rectangular strips 12. A fourth cylindrical rod 18 is arranged between the second rectangular strips 12. Both ends of the fourth cylindrical rod 18 are slidably arranged in the rectangular grooves 121 through second rectangular sliders 182. The second rectangular sliders 182 are fixedly connected to one side inside the rectangular grooves 121 through second springs 183. A second sprocket 181 is fixedly connected to the outer side of the middle part of the fourth cylindrical rod 18. The first sprockets 17 and the second sprockets 181 are driven by a chain 171.

[0035] Specifically, by driving the second sprocket 181 to rotate, the second sprocket 181 drives the two first sprockets 17 to rotate through the transmission of the chain 171. The first sprockets 17 can drive the two first cylinders 163 to rotate simultaneously. By simultaneously driving the two first cylinders 163 to rotate, the first cylinders 163 drive the lead screws 162 to move towards the side of the fourth rectangular bar 14 when rotating. The lead screws 162 drive the rings 1621 to closely adhere to one side of the fourth rectangular bar 14, and can fix multiple third rectangular bars 13 and the fourth rectangular bar 14 simultaneously. When adjusting the radian of the arc-shaped plate 1, the third rectangular bar 13 drives the first rectangular slider 16 to slide. The first rectangular slider 16 drives the first sprocket 17 to move through the first cylinder 163. When the distance between the two first sprockets 17 changes, due to the elastic force of the second spring 183, the second sprocket 181 drives the fourth cylindrical rod 18 to slide through the second rectangular slider 182 in the rectangular groove 121, so that the chain 171 always remains in a tensioned state.

[0036] As Figures 6-7 As shown in the figure, fixed rods 143 are fixedly connected to the upper and lower ends of the two fourth rectangular bars 14 respectively. A rectangular plate 19 is slidably arranged on the outer sides of the two opposite third rectangular bars 13. A first electric slide rail 191 is arranged on one side of the two rectangular plates 19. The first electric slide rail 191 is fixedly connected to the fixed rod 143 through a fixed block 192. The rectangular plate 19 is slidably arranged on one side of the first electric slide rail 191.

[0037] Specifically, by driving the rectangular plate 19 to slide on one side of the first electric slide rail 191, the rectangular plate 19 drives the third rectangular bar 13 to slide in the second rectangular hole 141, and the arc surface length of the arc-shaped plate 1 can be adjusted.

[0038] Embodiment 2: As Figure 3 As shown in the figure, compared with Embodiment 1, another implementation manner of the present invention is: a plurality of clamping blocks 21 are slidably arranged around the opposite sides of the first circular plate 2. A second circular plate 22 is rotatably arranged on the side of the first circular plate 2 away from the clamping blocks 21. First rectangular blocks 221 are fixedly connected to one side of the second circular plate 22. A second electric slide rail 23 is arranged on one side of the first rectangular block 221. The second electric slide rail 23 is fixedly connected to the upper end of the workbench 4. The first rectangular block 221 is slidably arranged on one side of the second electric slide rail 23.

[0039] Specifically, by placing the welding mold between the first circular plates 2, then driving the first rectangular block 221 to slide on one side of the second electric slide rail 23, the first rectangular block 221 drives the first circular plates 2 to approach each other through the second circular plate 22 until the upper and lower ends of the welding mold are clamped by the first circular plates 2. Then drive the clamping blocks 21 to slide towards the side of the arc-shaped mold, so that the clamping blocks 21 closely adhere to the side of the welding mold, making the welding mold fixed more firmly.

[0040] AsFigure 3 As shown, at the upper and lower ends of the second electric slide rail 23 near the first circular plate 2, second rectangular blocks 25 are fixedly connected respectively. Second cylinders 24 are rotatably penetrated through the middle of the second circular plate 22. The second cylinders 24 are fixedly connected to the first circular plate 2 respectively. Inside the end of the second cylinder 24 away from the first circular plate 2, a second special-shaped rod 241 is slidably arranged. One end of the second special-shaped rod 241 away from the second cylinder 24 is rotatably arranged on one side of the second rectangular block 25. The second special-shaped rod 241 at the lower end penetrates through the second rectangular block 25 and is fixedly connected to the output end of the motor 26. The motor 26 is installed inside the workbench 4.

[0041] Specifically, by driving the motor 26 to drive the second special-shaped rod 241 to rotate, the second special-shaped rod 241 drives the first circular plate 2 to rotate through the second cylinder 24, and the first circular plate 2 drives the welding mold clamped in the middle to rotate. When clamping the welding mold, the second circular plate 22 drives the first circular plates 2 to approach each other to clamp the welding mold, and at the same time, the second special-shaped rod 241 slides inside the second cylinder 24.

[0042] Working principle: Place the welding mold between the first circular plates 2, and then drive the first rectangular block 221 to slide on one side of the second electric slide rail 23. The first rectangular block 221 drives the first circular plates 2 to approach each other through the second circular plate 22 until the upper and lower ends of the welding mold are clamped by the first circular plates 2. Then drive the clamping block 21 to slide towards the side of the arc-shaped mold, so that the clamping block 21 is closely attached to the side of the welding mold to fix the welding mold. Then drive the end of the sandpaper 11 to be pulled out and fixed on the outer side of the first cylindrical rod 111 at the lower end, so that the sandpaper 11 wraps around the outer side of the arc-shaped plate 1. Then drive the third electric slide rail 31 to slide on the upper end of the fourth electric slide rail 32 towards the side close to the first circular plate 2, so that the arc-shaped plate 1 contacts the arc surface side of the welding mold. At the same time, the third rectangular strip 13 slides in the second rectangular hole 141, and at the same time, the first rectangular slider 16 slides inside the first rectangular hole 131 and the third rectangular hole 142. When the arc-shaped plate 1 is adjusted to be completely attached to the arc surface of the welding mold, by driving the second sprocket 181 to rotate, the second sprocket 181 drives the two first sprockets 17 to rotate through the transmission of the chain 171. The first sprockets 17 can drive the two first cylinders 163 to rotate at the same time. By driving the two first cylinders 163 to rotate at the same time, the first cylinder 163 drives the lead screw 162 to move towards the side close to the fourth rectangular strip 14 when rotating. The lead screw 162 drives the ring 1621 to closely adhere to one side of the fourth rectangular strip 14, and can fix a plurality of third rectangular strips 13 and fourth rectangular strips 14 at the same time, making the force on each contact point between the sandpaper 11 and the arc surface of the welding mold uniform during grinding, and keeping the shape of the arc-shaped plate 1 unchanged when replacing the sandpaper 11, without repeated adjustment; The driving motor 26 drives the second special-shaped rod 241 to rotate. The second special-shaped rod 241 drives the first circular plate 2 to rotate through the second cylinder 24. The first circular plate 2 drives the welding die clamped in the middle to rotate, and the arc surface of the welding die can be polished.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A fine grinding device for the arc surface finish of a welded pipe die, comprising a workbench (4). One side of the upper end of the workbench (4) is provided with a fixing component. The fixing component includes two first circular plates (2) slidably arranged on the upper end of the workbench (4). A fine grinding component is arranged on one side of the fixing component, and it is characterized in that: The fine grinding assembly includes an arc-shaped plate (1) slidably arranged on the upper end of a workbench (4). A sandpaper (11) is wrapped on one side of the arc-shaped plate (1) close to the first circular plate (2). At both ends of the arc-shaped plate (1) on the side away from the sandpaper (11), second rectangular bars (12) are rotatably arranged. A third rectangular bar (13) is arranged between the second rectangular bars (12). The third rectangular bar (13) is fixedly connected to the middle of the arc-shaped plate (1). One end of the third rectangular bar (13) away from the arc-shaped plate (1) is fixedly connected to a fourth rectangular bar (14). A second rectangular hole (141) is arranged at the position of the fourth rectangular bar (14) corresponding to the third rectangular bar (13). The third rectangular bar (13) is slidably arranged in the second rectangular hole (141).

2. The fine grinding device for the arc surface finish of a welded pipe die according to claim 1, wherein: Rectangular cylinders (113) are fixedly connected to both sides of the second rectangular bar (12). First rectangular bars (112) are respectively arranged at the upper and lower ends of the rectangular cylinder (113). A first cylindrical rod (111) is rotatably arranged between two opposite first rectangular bars (112). A roll of sandpaper (11) is installed on the outer side of the first cylindrical rod (111) at the upper end. The end of the roll of sandpaper (11) is pulled out and installed on the outer side of the first cylindrical rod (111) at the lower end.

3. The fine grinding device for the arc surface finish of a welded pipe mold according to claim 2, characterized in that: The first rectangular bars (112) are respectively slidably arranged inside both ends of the rectangular cylinder (113). The first rectangular bars (112) are respectively fixedly connected to the inside of the rectangular cylinder (113) through first springs (114).

4. A finishing grinding device for the arc surface finish of a welded pipe die according to claim 3, characterized in that: Two groups of cylindrical wheels (15) are respectively rotatably arranged at both ends of the arc-shaped plate (1). One group of the cylindrical wheels (15) includes cylindrical wheels (15) respectively arranged on both sides of the sandpaper (11). The sandpaper (11) is clamped by the cylindrical wheels (15).

5. The precision grinding device for the arc surface finish of a welded pipe die according to claim 4, characterized in that: Third cylindrical rods (144) are respectively fixedly connected to one side of the fourth rectangular bar (14). Second cylindrical rods (115) are respectively fixedly connected to one side of the rectangular cylinder (113). A support plate (3) is fixedly connected to the lower ends of the third cylindrical rod (144) and the second cylindrical rod (115). A fourth electric slide rail (32) is fixedly connected to the upper end of the workbench (4) corresponding to the position of the support plate (3). A third electric slide rail (31) is slidably arranged on the upper end of the fourth electric slide rail (32). The support plate (3) is slidably arranged on the upper end of the third electric slide rail (31).

6. The fine grinding device for the arc surface finish of a welded pipe die according to claim 5, wherein: The middle parts of the third rectangular bars (13) are respectively provided with first rectangular holes (131), the positions of the fourth rectangular bars (14) corresponding to the first rectangular holes (131) are respectively provided with third rectangular holes (142), the third rectangular holes (142) are perpendicular to the second rectangular holes (141), and first rectangular sliders (16) are jointly and slidably arranged inside the adjacent first rectangular holes (131) and third rectangular holes (142). Fixing components are respectively arranged in the middle parts of two adjacent first rectangular sliders (16). The fixing components include first special-shaped rods (161) fixedly connected between the two first rectangular sliders (16). The outer sides of the two ends of the first special-shaped rods (161) are slidably provided with lead screws (162). Rings (1621) are respectively fixedly connected to one ends of the lead screws (162) close to the fourth rectangular bars (14). A first cylinder (163) is commonly and threadedly connected to the outer sides of the opposite ends of the lead screws (162).

7. The fine grinding device for the arc surface finish of a welded pipe die according to claim 6, characterized in that: First sprockets (17) are respectively fixedly connected to the outer sides of the middles of the first cylinders (163). Rectangular grooves (121) are respectively provided on the opposite sides of the second rectangular bars (12). A fourth cylindrical rod (18) is arranged between the second rectangular bars (12). The two ends of the fourth cylindrical rod (18) are slidably arranged in the rectangular grooves (121) through second rectangular sliders (182). The second rectangular sliders (182) are fixedly connected to one sides of the interiors of the rectangular grooves (121) through second springs (183). A second sprocket (181) is fixedly connected to the outer side of the middle of the fourth cylindrical rod (18). The first sprockets (17) and the second sprockets (181) are driven by a chain (171).

8. An apparatus for precisely grinding the arc surface finish of a welded pipe die according to claim 7, characterized in that: Fixing rods (143) are respectively and jointly fixedly connected to the upper and lower ends of the two fourth rectangular bars (14). A rectangular plate (19) is slidably arranged on the outer sides of the opposite two third rectangular bars (13). A first electric slide rail (191) is arranged on one side of the two rectangular plates (19). The first electric slide rail (191) is fixedly connected to the fixing rod (143) through a fixing block (192). The rectangular plate (19) is slidably arranged on one side of the first electric slide rail (191).

9. The fine grinding device for the arc surface finish of a welded pipe die according to claim 1, wherein: A plurality of clamping blocks (21) are slidably arranged around the opposite sides of the first circular plate (2). A second circular plate (22) is rotatably arranged on the side of the first circular plate (2) away from the clamping blocks (21). First rectangular blocks (221) are respectively fixedly connected to one side of the second circular plate (22). A second electric slide rail (23) is arranged on one side of the first rectangular block (221). The second electric slide rail (23) is fixedly connected to the upper end of the workbench (4). The first rectangular block (221) is slidably arranged on one side of the second electric slide rail (23).

10. The fine grinding device for the arc surface finish of a welded pipe die according to claim 9, characterized in that: On the upper and lower ends of the second electric slide rail (23) close to one side of the first circular plate (2), second rectangular blocks (25) are fixedly connected respectively. The middle parts of the second circular plates (22) are respectively penetrated by second cylinders (24) in a rotatable manner. The second cylinders (24) are fixedly connected with the first circular plate (2) respectively. Inside one end of the second cylinder (24) away from the first circular plate (2), a second special-shaped rod (241) is slidably arranged. One end of the second special-shaped rod (241) away from the second cylinder (24) is rotatably arranged on one side of the second rectangular block (25). The second special-shaped rod (241) located at the lower end penetrates through the second rectangular block (25) and is fixedly connected with the output end of a motor (26). The motor (26) is installed inside the workbench (4).

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