Elbow inner wall polisher

Abstract

The application provides a bend inner wall polisher, a polishing head of a polisher of the bend inner wall polisher comprises a grinding head mounting base, a polishing assembly and an abutting assembly mounted on the grinding head mounting base, the polishing assembly comprises a grinding belt, a driving wheel and a driven wheel rotatably mounted on the grinding head mounting base, the driving wheel is connected with a transmission assembly on the grinding head mounting base, the abutting assembly comprises a first swing rod and a second swing rod rotatably connected with the grinding head mounting base, a free end of the first swing rod and a free end of the second swing rod are both provided with an abutting pressure roller, a first connecting column of the first swing rod and a second connecting column of the second swing rod are connected through a spring, the abutting pressure roller protrudes outward relative to the edge of the grinding head mounting base, the grinding belt is tightly wound between the driving wheel, the driven wheel and the abutting pressure roller, compared with the existing bend polishing head, the polishing head can always closely adhere to the inner wall of the bend, has less bounce, and guarantees polishing efficiency and polishing quality.

Description

Technical Field

[0001] This invention relates to the field of manufacturing technology of pipe bending inner wall grinding machines, and in particular to a pipe bending inner wall grinding machine. Background Technology

[0002] Existing bending pipe inner wall grinding devices are generally assembled from a bending pipe position controller and a grinder. After the bending pipe to be ground is placed and fixed on the bending pipe position controller, the bending pipe position controller adjusts the bending pipe position so that the bending pipe fits around the grinding head of the grinder and causes the bending pipe to move relative to the grinding head. The grinder then drives the grinding head to grind the inner wall of the bending pipe. In order to facilitate the grinding head to enter the inner wall of the bending pipe and prevent the grinding head from getting stuck at the bending position of the bending pipe, the outer dimension of the grinding head is generally designed to be smaller than the inner diameter of the bending pipe, so that there is a gap between the grinding head and the inner wall of the bending pipe, which is conducive to the smooth movement of the grinding head at the bending position of the bending pipe.

[0003] However, the grinding head rotates at a high speed and is prone to jumping during rotation, which causes the grinding belt or grinding wheel to not be in constant contact with the area to be ground, greatly reducing grinding efficiency and affecting grinding quality. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this invention is to provide a bending inner wall grinding machine that can both suppress grinding head vibration, make the grinding head fit tightly against the inner wall of the bent pipe, and ensure grinding quality and grinding efficiency.

[0005] The present invention achieves the above objectives as follows: This invention discloses a bend inner wall grinding machine, comprising a grinder and a bend clamp mounted on a machine base. The grinder includes a grinding head and a connecting crank rod connected to a second power unit. The grinding head includes a grinding head mounting base, and a grinding assembly and abutment assembly mounted on the grinding head mounting base. The grinding assembly includes a sanding belt and a driving wheel and a driven wheel rotatably mounted on the grinding head mounting base. The driving wheel is connected to the connecting crank rod via a transmission assembly on the grinding head mounting base. The abutment assembly includes a first swing arm and a second swing arm rotatably connected to the grinding head mounting base. Abutment pressure roller is mounted on the free end of both the first and second swing arms. A first connecting column of the first swing arm and a second connecting column of the second swing arm are connected by a spring. The abutment pressure roller protrudes outward relative to the edge of the grinding head mounting base. The sanding belt is tensioned and wrapped around the driving wheel, the driven wheel, and the abutment pressure roller.

[0006] Furthermore, the grinding head mounting base is also equipped with two limiting posts and a limiting block, the first swing arm is located between the two limiting posts, and the limiting block is located on one side of the second swing arm.

[0007] Furthermore, a connecting crankshaft and an output connecting shaft are rotatably installed inside the connecting crank. The connecting crankshaft is composed of several universal joints. The connecting crankshaft is connected to the output end of the second power unit through the output connecting shaft. A grinding head connecting assembly is installed at the free end of the connecting crank. The grinding head connecting assembly includes a grinding head connecting seat, a connecting shaft, and a connecting sleeve. The grinding head connecting seat is fixedly connected to the connecting crank. The grinding head connecting seat has an upper connecting countersunk hole and a lower connecting countersunk hole that communicate with the inner cavity of the grinding head connecting seat. The lower end of the connecting shaft is fixedly connected to the connecting crank and rotatably connected to the connecting crank. The upper end of the connecting shaft extends out of the connecting crank and is fixedly connected to the connecting sleeve. The connecting sleeve passes through the lower connecting countersunk hole of the grinding head connecting seat to extend into the inner cavity of the grinding head connecting seat. A connecting protrusion is also provided at the top of the grinding head connecting seat. The connecting protrusion has a connecting groove that communicates with the upper connecting countersunk hole.

[0008] Furthermore, the transmission assembly includes a connecting screw, a driving gear, a speed-increasing gear pair, and a driven gear. The grinding head mounting base has an inner cavity, and also has a mounting countersunk hole and several mounting upper countersunk holes communicating with the inner cavity. The speed-increasing gear pair, the driven gear, and the driving gear are all installed in the inner cavity. The connecting protrusion of the grinding head connecting seat passes through the mounting countersunk hole of the grinding head mounting base to extend into the inner cavity of the grinding head mounting base. The connecting screw passes through the connecting countersunk groove and the upper connecting countersunk hole in sequence and is fixedly connected to the connecting sleeve. The lower end of the connecting screw is also connected to a limit clamping block through an external thread section. The clamping block is rotatably connected to the upper connecting countersunk hole. The connecting screw shaft is also rotatably connected to the connecting countersunk hole via a bearing. A nut is fixed to the top of the connecting screw shaft. The driving gear is fixedly connected to the connecting screw shaft and is located between the nut and the connecting protrusion. The driving gear meshes with the speed-increasing gear pair. The driven gear meshes with the speed-increasing gear pair. The driven wheel is connected to the screw shaft via a bearing and is connected to the screw hole on the grinding head mounting seat via the screw shaft. The connecting rod of the driving wheel is fixedly connected to the driven gear. The connecting rod of the driving wheel is also sealed to the upper mounting countersunk hole via a sealing ring.

[0009] Furthermore, the second power unit includes a servo motor and a reducer, the output end of the servo motor is connected to the reducer, and the output end of the reducer is connected to the output connecting shaft.

[0010] Furthermore, the pipe bending clamp includes a first power unit, a pipe bending support, a pipe bending block installed in the pipe bending support, and two pipe bending clamps that cooperate with each other. The output end of the first power unit is fixedly connected to a mounting plate, and a pulley is installed at the bottom of the mounting plate. The pipe bending support is fixedly installed on the mounting plate. The pipe bending block has a groove that matches the outer contour of the pipe bending. The pipe bending clamp includes a push-clamp cylinder and a clamping plate. The clamping plate is fixedly connected to the push rod of the push-clamp cylinder. The clamping plate has slots on both sides that match the outer contour of the pipe bending.

[0011] Furthermore, the machine base is also equipped with a first horizontal position adjuster, a second horizontal position adjuster, and a height position adjuster. The first horizontal position adjuster includes a first slide rail mounted on the machine base, a first slide block slidably connected to the first slide rail, a first lead screw mounted between the two first slide rails, and a first motor connected to the first lead screw. The bottom of the first slide block is connected to the first lead screw via a first nut. The height position adjuster is mounted on the first slide block. The height position adjuster includes a longitudinal mounting base, a third motor and a third slide rail mounted on the longitudinal mounting base, and a third slide block slidably connected to the third slide rail. The output end of the three motors is connected to a third lead screw, which is located between the two third slide rails. The bottom of the third slide block is connected to the third lead screw via a third nut. The grinder is mounted on the third slide block. The second horizontal position adjuster is located on one side of the first horizontal position adjuster. The second horizontal position adjuster includes a second motor and a second slide rail slidably connected to a second slide block. The pipe bending clamp is mounted on the second slide block. The output end of the second motor is connected to a second lead screw, which is located between the two second slide rails. The bottom of the second slide block is connected to the second lead screw via a second nut.

[0012] The beneficial effects of this invention are: The present invention provides a bend inner wall grinding machine, which adds a backing assembly including a first swing arm and a second swing arm to the grinding head mounting seat. The first and second swing arms are rotatably connected to the grinding head mounting seat, and a backing pressure roller for abutting against the inner wall of the bend is installed at the free ends of the first and second swing arms. A spring connects the first linkage column of the first swing arm and the second linkage column of the second swing arm together, and a grinding belt is wrapped and tensioned around the driving wheel, driven wheel, and backing pressure roller. In this way, after the grinding head enters the bend, the first and second swing arms can cooperate to rotate counterclockwise around their axis and clockwise around their axis, or the first swing arm... The first rocker arm rotates clockwise around its axis, while the second rocker arm rotates counterclockwise around its axis, adjusting the position of the two pressure rollers relative to the inner wall of the bend. The cooperation of the first and second rocker arms supports the two pressure rollers, ensuring they remain firmly against the inner wall of the bend. This close contact between the two pressure rollers and the inner wall suppresses vibrations during operation and keeps the abrasive belt in close contact with the bend, guaranteeing grinding quality and efficiency. Furthermore, the two pressure rollers protrude from the edge of the grinding head mounting base, creating a gap between the inner wall of the bend and the grinding head mounting base, facilitating smooth movement of the grinding head within the bend's curve. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of a bend inner wall grinding machine according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the back structure of a bend inner wall grinding machine according to an embodiment of the present invention; Figure 3 This is a schematic diagram showing the positional relationship between the grinder and the pipe bending clamp in one embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the inner support block connecting plate of the bend pipe support in one embodiment of the present invention; Figure 5 This is a partial structural diagram of the grinder in one embodiment of the present invention; Figure 6 for Figure 5 Enlarged diagram of A in the middle; Figure 7 This is a schematic diagram showing the connection relationship between the connecting crank and the grinding head in one embodiment of the present invention; Figure 8 This is a schematic diagram showing the connection relationship between the grinding head connecting seat and the grinding head in one embodiment of the present invention; Figure 9This is a schematic diagram showing the connection relationship between the connecting shaft, the connecting sleeve, and the grinding head in one embodiment of the present invention; Figure 10 This is a schematic diagram of the connection relationship of the transmission components inside the grinding head mounting base in one embodiment of the present invention; Figure 11 This is a schematic diagram showing the connection relationship between the connecting screw and the grinding head connecting seat in one embodiment of the present invention; Figure 12 This is a schematic diagram of the internal cavity structure of the grinding head connecting seat in one embodiment of the present invention.

[0014] In the diagram, 1 is the grinder, 2 is the pipe bending clamp, 11 is the grinding head, 12 is the second power unit, 13 is the connecting crank, 111 is the grinding head mounting base, 112 is the grinding assembly, 113 is the abutment assembly, 1122 is the driving wheel, 1121 is the driven wheel, 1131 is the first rocker arm, 1132 is the second rocker arm, 1133 is the abutment pressure roller, 1134 is the spring, 11311 is the first connecting column, 11321 is the second connecting column, 1135 is the limiting column, 1135 is the limiting block, 131 is the connecting crankshaft, 132 is the output connecting shaft, 14 is the grinding head connecting assembly, 141 is the grinding head connecting seat, 142 is the connecting shaft, 143 is the connecting sleeve, 1411 is the lower connecting countersunk hole, 1412 is the upper connecting countersunk hole, 1413 is the connecting groove, 1414 is the connecting protrusion, 1111 is the mounting countersunk hole, 1141 is the connecting screw, 1142 is the bearing, and 1143 is the... Limiting and tightening block, 1144 driving gear, 1145 speed-increasing gear pair, 1146 driven gear, 1147 sealing ring, 11411 nut, 121 servo motor, 122 reducer, 21 first power unit, 22 bend pipe support, 23 bend pipe block, 24 bend pipe clamp, 25 mounting plate, 26 pulley, 231 support groove, 241 push clamp cylinder, 242 clamping plate, 2421 slot, 3 first horizontal position adjuster, 4 second horizontal position adjuster, 5 height position adjuster, 31 first slide rail, 32 first slide block, 33 first lead screw, 34 first motor, 51 longitudinal mounting base, 52 third motor, 53 third slide rail, 54 third slide block, 41 second motor, 42 second slide block, 43 second slide rail, 44 second lead screw, 27 support block connecting plate, 271 mounting slot. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this invention are only used to explain this invention and are not intended to limit this invention.

[0016] Figures 3-10The diagram illustrates the specific structure of a bend inner wall grinding machine according to an embodiment of the present invention. The bend inner wall grinding machine includes a grinder 1 and a bend clamp 2 mounted on a base. The grinder 1 includes a grinding head 11 and a connecting crank 13 connected to a second power unit 12. The grinding head 11 includes a grinding head mounting base 111, and a grinding assembly 112 and abutment assembly 113 mounted on the grinding head mounting base 111. The grinding assembly 112 includes a sanding belt (not shown), and a driving wheel 1122 and a driven wheel 1121 rotatably mounted on the grinding head mounting base 111. The driving wheel 1122 is connected to the driven wheel 1121 via a transmission assembly on the grinding head mounting base 111. The connecting crank 13 is connected, and the abutting assembly 113 includes a first rocker arm 1131 and a second rocker arm 1132 rotatably connected to the grinding head mounting base 111. The free ends of the first rocker arm 1131 and the free ends of the second rocker arm 1132 are each equipped with an abutting pressure roller 1133. The first connecting column 11311 of the first rocker arm 1131 and the second connecting column 11321 of the second rocker arm 1132 are connected by a spring 1134. The abutting pressure roller 1133 protrudes outward relative to the edge of the grinding head mounting base 111. The abrasive belt is tensioned and wrapped around the driving wheel 1122, the driven wheel 1121 and the abutting pressure roller 1133.

[0017] The present invention provides a bend inner wall grinding machine, which adds a backing assembly 113 including a first swing arm 1131 and a second swing arm 1132 to the grinding head mounting seat 111 of the grinding head 11. The first swing arm 1131 and the second swing arm 1132 are rotatably connected to the grinding head mounting seat 1111, and the backing pressure roller 1133 for abutting against and closely adhering to the inner wall of the bend is installed at the free end of the first swing arm 1131 and the free end of the second swing arm 1132, and the backing assembly is connected by a spring. 1134 connects the first linkage column 11311 of the first rocker arm 1131 and the second linkage column 11321 of the second rocker arm 1132 together, and the abrasive belt is wrapped and tensioned around the driving wheel 1122, the driven wheel 1121 and the pressure roller 1133. Thus, after the grinding head 11 enters the curved tube, it can be driven by the interaction of the first rocker arm 1131 and the second rocker arm 1132, including the first rocker arm 1131 rotating counterclockwise around its axis. The second rocker arm 1132 rotates clockwise around its axis, or the first rocker arm 1131 rotates clockwise around its axis and the second rocker arm 1132 rotates counterclockwise around its axis, to adjust the position of the two pressure rollers 1133 relative to the inner wall of the bend. The cooperation of the first rocker arm 1131 and the second rocker arm 1132 supports the two pressure rollers 1133, ensuring that the two pressure rollers 1133 always remain pressed against the inner wall of the bend. Thus, the grinding head 11 can be driven by the two... The pressure rollers 1133 are kept in close contact with the inner wall of the bend, thereby suppressing the vibration generated during the operation and ensuring that the abrasive belt remains in close contact with the inner wall of the bend, thus guaranteeing the grinding quality and efficiency. Furthermore, the two pressure rollers 1133 protrude from the edge of the grinding head mounting seat 1111, which allows for a certain gap between the inner wall of the bend and the grinding head mounting seat 1111 of the grinding head 11, facilitating the smooth movement of the grinding head 11 at the bending position of the bend.

[0018] Furthermore, in this embodiment, as Figure 6As shown, the grinding head mounting base 111 is also equipped with two limiting posts 1135 and a limiting block 1136. The first swing arm 1131 is located between the two limiting posts 1135, and the limiting block 1136 is located on one side of the second swing arm 1132. The two limiting posts 1135 limit the swing amplitude of the first swing arm 1131. The first swing arm 1131 and the second swing arm 1132 are interconnected by the spring 1134. By using the two limiting posts 1135 to limit the swing amplitude of the first swing arm 1131, the swing arm 1131 is effectively controlled. The swing amplitude is limited by the first swing arm 1131 through the spring 1134 to limit the swing amplitude of the second swing arm 1132. This can prevent the first swing arm 1131 and the second swing arm 1132 from colliding with other components on the grinding head mounting base 111, including the grinding assembly, and damaging other components. It can also ensure that a certain gap is always maintained between the grinding head mounting base 111 and the inner wall of the bend, preventing the grinding head 11 from getting stuck between the grinding head 11 and the inner wall of the bend, and ensuring that the grinding head 11 can move smoothly on the inner wall of the bend.

[0019] Furthermore, in this embodiment, as Figure 7 , Figure 8 , Figure 9 , Figure 11 as well as Figure 12 As shown, a connecting crankshaft 131 and an output connecting shaft 132 are rotatably mounted inside the connecting crank 13. The connecting crankshaft 131 is composed of several universal joints. The connecting crankshaft 131 is connected to the output end of the second power unit 12 through the output connecting shaft 132. A grinding head connecting assembly 14 is installed at the free end of the connecting crank 13. The grinding head connecting assembly 14 includes a grinding head connecting seat 141, a connecting shaft 142, and a connecting sleeve 143. The grinding head connecting seat 141 is fixedly connected to the connecting crank 13. The grinding head connecting seat 141 has an upper connecting... The grinding head connecting seat 141 has a lower connecting countersunk hole 1412 and a lower connecting countersunk hole 1411. The lower end of the connecting shaft 142 is fixedly connected to the connecting crankshaft 131 and rotatably connected to the connecting crank rod 13. The upper end of the connecting shaft 142 extends out of the connecting crank rod 13 and is fixedly connected to the connecting sleeve 143. The connecting sleeve 143 passes through the lower connecting countersunk hole 1411 of the grinding head connecting seat 141 to extend into the inner cavity of the grinding head connecting seat 141. The top of the grinding head connecting seat 141 is also provided with a connecting protrusion 1414. The connecting protrusion 1414 has a connecting groove 1413 that communicates with the upper connecting countersunk hole 1412.

[0020] Furthermore, in this embodiment, as Figures 8-12As shown, the transmission assembly on the grinding head mounting base 111 includes a connecting screw 1141, a driving gear 1144, a speed-increasing gear pair 1145, and a driven gear 1146. The grinding head mounting base 111 has an inner cavity, and also has a mounting recess 1111 and several mounting upper recesses communicating with the inner cavity. The speed-increasing gear pair 1145, the driven gear 1146, and the driving gear 1144 are all installed in the inner cavity. The connecting protrusion 1414 of the grinding head connecting seat 141 passes through the mounting recess 111 of the grinding head mounting base 111 to extend into the inner cavity of the grinding head mounting base 111. The connecting screw 1141 passes through the connecting groove 1413 and the upper connecting recess 1412 in sequence and is fixedly connected to the connecting sleeve 143. The lower end of the connecting screw 1141 is also connected to a limit clamping block 1143 through an external thread section. The fastening block 1143 is rotatably connected to the upper connecting countersunk hole 1412. The connecting screw shaft 1141 is also rotatably connected to the connecting countersunk groove 1413 via a bearing 1142. A nut 11411 is fixed to the top of the connecting screw shaft 1141. The driving gear 1144 is fixedly connected to the connecting screw shaft 1141 and is located between the nut 11411 and the connecting protrusion 1414. The driving gear 1144 meshes with the speed-increasing gear pair 1145. The driven gear 1146 meshes with the speed-increasing gear pair 1145. The driven wheel 1121 is connected to a screw shaft via a bearing and is connected to a screw hole on the grinding head mounting seat 111 via the screw shaft. The connecting rod of the driving wheel 1122 is fixedly connected to the driven gear 1146. The connecting rod of the driving wheel 1122 is also rotatably connected to the upper mounting countersunk hole via a sealing ring 1147.

[0021] The output end of the second power unit 12 transmits power to the output connecting shaft 132. The output connecting shaft 132 drives the connecting sleeve 143 to rotate via the connecting crankshaft 131 and the connecting rotating shaft 142. In turn, the connecting sleeve 143 drives the connecting screw shaft 1141 to rotate. The connecting screw shaft 1141 drives the driven gear 116 to rotate via the driving gear 1144 and the speed-increasing gear pair 1145. This causes the driving wheel 1122 to rotate, and the driving wheel 1122 drives the abrasive belt to roll. The second power unit 12 connects the driving gear 1144 and the driven gear 1146 via the speed-increasing gear pair 1145. The speed-increasing gear pair 1145 can amplify and increase the power transmitted by the driving gear 1144, thereby improving and accelerating the rotation of the driven gear 1146. In this way, the second power unit 12 can drive the driving wheel 1122 to rotate at the required speed by outputting a smaller power, thereby reducing the energy consumption of the second power unit 12 and reducing its losses.

[0022] Furthermore, in this embodiment, as Figure 3 As shown, the second power unit 12 includes a servo motor 121 and a reducer 122. The output end of the servo motor 121 is connected to the reducer 122, and the output end of the reducer 122 is connected to the output connecting shaft 132.

[0023] Furthermore, in this embodiment, as Figures 1-3 As shown, the pipe bending clamp 2 includes a first power unit 21, a pipe bending support 22, a pipe bending block 23 installed in the pipe bending support 22, and two pipe bending clamps 24 that cooperate with each other. The output end of the first power unit 21 is fixedly connected to a mounting plate 25. A pulley 26 is installed at the bottom of the mounting plate 25. The pipe bending support 22 is fixedly installed on the mounting plate 25. The pipe bending block 23 has a groove 231 that matches the outer contour of the pipe bending. The pipe bending clamps 24 include a push-clamp cylinder 241 and a clamping plate 242. The clamping plate 242 is fixedly connected to the push rod of the push-clamping cylinder 241. The clamping plate 242 has slots 2421 on both sides that are adapted to the outer contour of the bent pipe. Driven by the output end of the first power unit 21, the mounting plate 25 rotates around the axis of the output end of the first power unit 21, and drives the bent pipe support 22 to rotate around the axis of the output end of the first power unit 21. During the rotation, the bent pipe support 22 drives the bent pipe to move towards the grinding head 11, so that the grinding head 11 enters the inside of the bent pipe.

[0024] Furthermore, to facilitate the replacement of pipe bend supports of different sizes to accommodate pipe bends of varying dimensions, in this embodiment, as shown... Figure 3 and Figure 4 As shown, a support block connecting plate 27 is also installed inside the bent pipe support 22. The support block connecting plate 27 has an installation slot 271. The bottom of the bent pipe support block 23 has a protrusion that cooperates with the installation slot 271. The bent pipe support block 23 and the support block connecting plate 27 are interlocked.

[0025] Furthermore, in this embodiment, as Figure 1 and Figure 2As shown, the machine base is also equipped with a first horizontal position adjuster 3, a second horizontal position adjuster 4, and a height position adjuster 5. The first horizontal position adjuster 3 includes a first slide rail 31 mounted on the machine base, a first slide block 32 slidably connected to the first slide rail 31, a first lead screw 33 mounted between the two first slide rails, and a first motor 34 connected to the first lead screw 33. The bottom of the first slide block 32 is connected to the first lead screw 33 by a first nut. The height position adjuster 5 is mounted on the first slide block 32. The height position adjuster 5 includes a longitudinal mounting base 51, a third motor 52 and a third slide rail 53 mounted on the longitudinal mounting base 51, and a third slide block 54 slidably connected to the third slide rail 53. The output end of the third motor 52 is connected to a third lead screw, which is located between the two third slide rails 53. The bottom of the third slide block 54 is connected to the third lead screw via a third nut. The grinder 1 is mounted on the third slide block 54. The second horizontal position adjuster 4 is located on one side of the first horizontal position adjuster 3. The second horizontal position adjuster 4 includes a second motor 41 and a second slide rail 43 slidably connected to a second slide block 42. The pipe bending clamp 2 is mounted on the second slide block 42. The output end of the second motor 41 is connected to a second lead screw 44, which is located between the two second slide rails 43. The bottom of the second slide block 42 is connected to the second lead screw 44 via a second nut.

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this invention are only used to explain this invention and are not intended to limit this invention.

[0027] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made with respect to the claims and scope of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A bend inner wall grinding machine, comprising a grinder (1) and a bend clamp (2) mounted on a machine base, characterized in that: The grinder (1) includes a grinding head (11) and a connecting crank (13) connected to a second power unit (12). The grinding head (11) includes a grinding head mounting base (111), a grinding assembly (112) and a retaining assembly (113) mounted on the grinding head mounting base (111). The grinding assembly (112) includes a grinding belt, a drive wheel (1122) and a driven wheel (1121) rotatably mounted on the grinding head mounting base (111). The drive wheel (1122) is connected to the connecting crank (13) through a transmission assembly on the grinding head mounting base (111). The retaining assembly (113) includes a grinding belt rotatably connected to the grinding head mounting base (111). The head mounting base (111) has a first swing arm (1131) and a second swing arm (1132). The free ends of the first swing arm (1131) and the second swing arm (1132) are both equipped with abutting rollers (1133). The first connecting column (11311) of the first swing arm (1131) and the second connecting column (11321) of the second swing arm (1132) are connected by a spring (1134). The abutting rollers (1133) protrude outward relative to the edge of the grinding head mounting base (111). The abrasive belt is tensioned and wrapped around the driving wheel (1122), the driven wheel (1121) and the abutting rollers (1133).

2. The elbow inner wall grinding machine according to claim 1, characterized in that: The grinding head mounting base (111) is also equipped with two limiting posts (1135) and a limiting block (1136). The first swing rod (1131) is located between the two limiting posts (1135), and the limiting block (1136) is located on one side of the second swing rod (1132).

3. A bend inner wall grinding machine according to claim 1 or 2, characterized in that: A connecting crankshaft (131) and an output connecting shaft (132) are rotatably mounted inside the connecting crank (13). The connecting crankshaft (131) is composed of several universal joints. The connecting crankshaft (131) is connected to the output end of the second power unit (12) through the output connecting shaft (132). A grinding head connecting assembly (14) is installed on the free end of the connecting crank (13). The grinding head connecting assembly (14) includes a grinding head connecting seat (141), a connecting shaft (142), and a connecting sleeve (143). The grinding head connecting seat (141) is fixedly connected to the connecting crank (13). The grinding head connecting seat (141) has an upper connecting recess that communicates with the inner cavity of the grinding head connecting seat (141). The lower end of the connecting shaft (142) is fixedly connected to the connecting crankshaft (131) and rotatably connected to the connecting crank (13). The upper end of the connecting shaft (142) passes through the connecting crank (13) and is fixedly connected to the connecting sleeve (143). The connecting sleeve (143) passes through the lower connecting countersunk hole (1411) of the grinding head connecting seat (141) to extend into the inner cavity of the grinding head connecting seat (141). The top of the grinding head connecting seat (141) is also provided with a connecting protrusion (1414). The connecting protrusion (1414) has a connecting groove (1413) that communicates with the upper connecting countersunk hole (1412).

4. The elbow inner wall grinding machine according to claim 3, characterized in that: The transmission assembly includes a connecting screw (1141), a driving gear (1144), a speed-increasing gear pair (1145), and a driven gear (1146). The grinding head mounting base (111) has an inner cavity, and also has a mounting countersunk hole (1111) communicating with the inner cavity and several mounting countersunk holes. The speed-increasing gear pair (1145), the driven gear (1146), and the driving gear (1144) are all installed in the inner cavity; the connecting protrusion of the grinding head connecting base (141) The column (1414) passes through the mounting countersunk hole (1111) of the grinding head mounting base (111) to extend into the inner cavity of the grinding head mounting base (111). The connecting screw (1141) passes through the connecting countersunk groove (1413) and the upper connecting countersunk hole (1412) in sequence and is fixedly connected to the connecting sleeve (143). The lower end of the connecting screw (1141) is also connected to a limiting clamping block (1143) through an external thread section. The limiting clamping block (1143) The connecting screw shaft (1141) is rotatably connected to the upper connecting countersunk hole (1412) and is also rotatably connected to the connecting groove (1413) via a bearing (1142). A nut (11411) is fixed to the top of the connecting screw shaft (1141). The driving gear (1144) is fixedly connected to the connecting screw shaft (1141) and is located between the nut (11411) and the connecting protrusion (1414). The driving gear (1144) is connected to the connecting groove (1413). The speed-increasing gear pair (1145) is meshed with the driven gear (1146), and the speed-increasing gear pair (1145) is meshed with the driven wheel (1121). The driven wheel (1121) is connected to a screw shaft through a bearing and is connected to a screw hole on the grinding head mounting seat (111) through the screw shaft. The connecting rod of the driving wheel (1122) is fixedly connected to the driven gear (1146). The connecting rod of the driving wheel (1122) is also sealed to the upper mounting countersunk hole through a sealing ring (1147).

5. The elbow inner wall grinding machine according to claim 3, characterized in that: The second power unit (12) includes a servo motor (121) and a reducer (122). The output end of the servo motor (121) is connected to the reducer (122), and the output end of the reducer (122) is connected to the output connecting shaft (132).

6. The elbow inner wall grinding machine according to claim 3, characterized in that: The pipe bending clamp (2) includes a first power unit (21), a pipe bending support (22), a pipe bending block (23) installed in the pipe bending support (22), and two pipe bending clamps (24) that cooperate with each other. The output end of the first power unit (21) is fixedly connected to a mounting plate (25). A pulley (26) is installed at the bottom of the mounting plate (25). The pipe bending support (22) is fixedly installed on the mounting plate (25). The pipe bending block (23) has a groove (231) that matches the outer contour of the pipe bending. The pipe bending clamp (24) includes a push-clamp cylinder (241) and a clamping plate (242). The clamping plate (242) is fixedly connected to the push rod of the push-clamp cylinder (241). The clamping plate (242) has slots (2421) on both sides that match the outer contour of the pipe bending.

7. The elbow inner wall grinding machine according to claim 3, characterized in that: The base is also equipped with a first horizontal position adjuster (3), a second horizontal position adjuster (4), and a height position adjuster (5). The first horizontal position adjuster (3) includes a first slide rail (31) mounted on the base, a first slide block (32) slidably connected to the first slide rail (31), a first lead screw (33) mounted between the two first slide rails (31), and a first motor (34) connected to the first lead screw (33). The bottom of the first slide block (32) is connected to the first lead screw (33) by a first nut. The height position adjuster (5) is mounted on the first slide block (32). The height position adjuster (5) includes a longitudinal mounting base (51), a third motor (52) and a third slide rail (53) mounted on the longitudinal mounting base (51), and a third slide block (54) slidably connected to the third slide rail (53). The output end of the third motor (52) is connected to the third lead screw, which is located between the two third slide rails (53). The bottom of the third slide block (54) is connected to the third lead screw through the third nut. The grinder (1) is installed on the third slide block (54). The second horizontal position adjuster (4) is located on one side of the first horizontal position adjuster (3). The second horizontal position adjuster (4) includes a second motor (41) and a second slide rail (43) slidably connected to the second slide block (42). The pipe bending clamp (2) is installed on the second slide block (42). The output end of the second motor (41) is connected to the second lead screw (44). The second lead screw (44) is located between the two second slide rails (43). The bottom of the second slide block (42) is connected to the second lead screw (44) through the second nut.

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