Self-adaptive inner wall grinding structure of grinding machine and pipe inside and outside grinding machine

Abstract

The invention discloses a self-adaptive inner wall grinding structure of a grinding machine and a pipe inside and outside grinding machine. According to the self-adaptive inner wall grinding structure, the position of a grinding head is fixed through a positioning hole to prevent threads from being locked, and the inner diameter of a pipe can be self-adaptive through the characteristic that a double-layer rubber sleeve is prone to deformation; and when the inner diameter changes, the self-adaptive pipe inner wall polishing structure can continuously polish pipes with different inner diameters without pausing mechanical operation. The self-adaptive polishing device is characterized by being composed of a fixing assembly and a self-adaptive polishing assembly, the fixing assembly is composed of a connecting shaft, a rubber ring, connecting grooves, fixing grooves, connecting ribs, connecting holes, positioning holes, positioning rods and fixing columns, the fixing grooves are formed in one end of the connecting shaft and are of a cylindrical structure, and the multiple connecting grooves are formed in the side face of each fixing groove. The positioning rod is formed by coaxially overlapping two cylinders with different diameters, connecting ribs are arranged on the side face of the cylinder with the smaller diameter of the positioning rod, and the connecting grooves correspond to the connecting ribs in a one-to-one mode.

Description

Technical Field

[0001] The present invention discloses an adaptive inner wall grinding structure of a grinder and an inner and outer grinder for pipes, which relate to an inner wall grinding structure installed on an inner and outer grinder for pipes and which can autonomously adjust to adapt to different inner diameters. The structure belongs to the field of mechanical equipment, and particularly relates to an adaptive inner wall grinding structure for pipes, which can fix the position of a grinding head through a positioning hole to prevent thread locking, can autonomously adapt to the inner diameter of the pipe through the easily deformable property of a double-layer rubber sleeve, and can continuously grind pipes with different inner diameters without pausing mechanical operation when the inner diameter changes. Background Art

[0002] After mechanical processing, there may be a hardened layer on the surface of the pipe. This hardened layer is brittle and has residual stress. It is easy to crack during the early use of the pipe. It is also very easy to oxidize, rust or accumulate impurities during the storage of the pipe. Therefore, they often need to be polished before use. The surface of the pipe after polishing is smooth, which is conducive to subsequent processing operations, such as painting, plating, etc. These coatings or plating can provide additional protection and extend the service life of the pipe. Therefore, polishing is an important step in pipe pretreatment, which is not only related to the appearance and performance of the pipe, but also directly affects its performance and life in subsequent applications. The existing pipe polishing device can generally only polish the inner wall or outer wall of the pipe alone. When the entire pipe needs to be polished, it is necessary to use a special internal polishing device to polish the inner wall and then use an external polishing device to polish the outer wall. In this process, workers are required to move the pipe many times, which not only has a high processing cost but also increases the workload and reduces work efficiency. Announcement No. CN137863443B discloses a pipe grinder, comprising a workbench, motor frames are installed on both sides of the bottom of the inner cavity of the workbench, a motor is installed on the top of the motor frame, one side of the motor is connected to an output shaft, one side of the output shaft is connected to an operating table, one side of the operating table is connected to an electric telescopic rod, one side of the electric telescopic rod is connected to a grinding sheet, the bottom of the operating table is fixedly connected to a baffle, the bottom of the baffle is connected to a buffer spring, the bottom of the buffer spring is installed with a support plate, the bottom of the support plate is fixedly connected to a pneumatic rod, the bottom of the pneumatic rod is installed with a fixed block, the top of the inner cavity of the workbench is movably connected to a sliding block, the bottom of the sliding block is installed with a fixed seat, the inner cavity of the fixed seat is provided with a clamping ring, both sides of the clamping ring are connected to screws, one side of the screw is connected to a nut, the bottom of the clamping ring is fixedly connected to a clamping block, and both sides of the clamping block are movably connected to pins. This grinder can only grind both sides of the outer wall of the pipe. Grinding the outer wall requires workers to rotate the pipe multiple times, which has extremely low work efficiency and is easy to accidentally injure workers. Announcement No. CN386633696U discloses a pipe inner wall grinder, including a base, a positioning mechanism fixedly arranged on the base, and a grinding mechanism arranged on the base. The positioning mechanism includes a plurality of positioning chucks arranged at one end of the base and a positioning seat arranged on the base. The positioning chuck is used to position one end of the pipe to be polished. The positioning seat is provided with a plurality of positioning grooves. The positioning grooves are used to position the other end of the pipe to be polished. The grinding mechanism is used to grind the inner wall of the pipe after positioning. This grinder can only grind the inner wall of the pipe, and after grinding, it needs to be manually reset and then grind a second time, which increases extra workload.

[0003] In order to improve the above problems, the applicant filed a Chinese invention patent application entitled "A pipe internal and external grinding device", which uses a transmission wheel to drive the pipe to move, and uses a grinding brush to grind the inner and outer walls of the pipe at the same time. However, the above pipe internal and external grinding device can only grind pipes with fixed inner diameters. When the inner diameters of the pipes are different, the robot needs to be stopped to manually replace the grinding head, which not only increases the operation time, but also reduces the overall work efficiency. Frequent replacement of grinding heads can cause wear of threaded connections, thereby causing locking problems and affecting the reliability and stability of the equipment. Summary of the invention

[0004] In order to improve the above situation, the present invention provides an adaptive inner wall grinding structure of a grinder and an inner and outer grinder for pipes, which provides a structure for fixing the grinding head position through a positioning hole to prevent thread locking, and can autonomously adapt to the inner diameter of the pipe through the easy deformation of the double-layer rubber sleeve, and can continuously grind pipes with different inner diameters without pausing the machine operation when the inner diameter changes.

[0005] The invention discloses a grinder self-adaptive inner wall grinding structure and a pipe inner and outer grinding machine, which are realized as follows: the grinder self-adaptive inner wall grinding structure is composed of a fixing assembly and a self-adaptive grinding assembly, wherein the fixing assembly is composed of a connecting shaft, a rubber ring, a connecting groove, a fixing groove, a connecting rib, a connecting hole, a positioning hole, a positioning rod and a fixing column. A fixing groove is provided at one end of the connecting shaft. Preferably, the fixing groove is a cylindrical structure. The side of the fixing groove is provided with a plurality of connecting grooves. The positioning rod is composed of two coaxially stacked cylinders with different diameters. A connecting rib is provided on the side of the cylinder with a smaller diameter of the positioning rod. The connecting groove and the connecting rib correspond to each other one by one. The positioning rod is slidably placed in the fixing groove through the connecting rib and the connecting groove. Preferably, the diameter of the cylinder with the smaller cross-sectional diameter of the positioning rod is less than or equal to the cross-sectional diameter of the fixing groove, and the diameter of the cylinder with the larger cross-sectional diameter of the positioning rod is larger than the cross-sectional diameter of the fixing groove. There are multiple positioning holes on the connecting shaft. Preferably, the plurality of positioning holes are arranged equidistantly along the axial direction of the connecting shaft. There are multiple connection holes on the positioning rod. Preferably, the plurality of connecting holes are arranged equidistantly along the axial direction of the positioning rod. The positioning holes and the connecting holes correspond one to one, The plug-in connection of the fixing column is arranged on the positioning hole, and the plug-in connection of the fixing column is arranged on the connecting hole. Preferably, the fixing column is a cylindrical structure. The rubber ring is placed on the fixed column. Preferably, the rubber ring is in a cylindrical structure and has a relatively large friction force. The adaptive grinding assembly is composed of grinding particles, a limit grinding head, a cylindrical grinding head, a variable spring, a slope grinding head, a supporting rubber ring, a double-layer rubber sleeve and a placement groove. The limit grinding head is fixed on the positioning rod, and the end of the positioning rod with a larger cross-sectional diameter is connected to the limit grinding head. Preferably, the position-limiting grinding head is in a truncated cone-shaped structure, a table with a smaller cross-sectional diameter of the position-limiting grinding head is connected to the positioning rod, and the position-limiting grinding head and the positioning rod are coaxially arranged. One end of the cylindrical grinding head is fixed on the other surface of the limit grinding head. Preferably, the cylindrical grinding head is arranged in a cylindrical shape, the cross-sectional diameter of the cylindrical grinding head is the same as the maximum cross-sectional diameter of the position-limiting grinding head, and the cylindrical grinding head and the position-limiting grinding head are arranged coaxially. The slope grinding head is fixed on the other end of the cylindrical grinding head. Preferably, the slope grinding head is arranged in a truncated cone shape, the larger cross-sectional surface of the slope grinding head is connected to the other end of the cylindrical grinding head, and the maximum cross-sectional diameter of the slope grinding head is the same as the diameter of the cylindrical grinding head. The double-layer rubber sleeve is placed on the cylindrical grinding head and the slope grinding head, and corresponds to the shape of the cylindrical grinding head and the slope grinding head. Preferably, the double-layer rubber sleeve has two layers, a cavity is provided inside the double-layer rubber sleeve to divide the double-layer rubber sleeve into an inner layer and an outer layer, the outer layer of the double-layer rubber sleeve is a heat-insulating material, the cross-sectional diameter at the middle end of the double-layer rubber sleeve is larger than the cross-sectional diameter at both ends, and the cross-sectional diameters at both ends of the double-layer rubber sleeve gradually decrease. The supporting rubber ring is fixed in the double-layer rubber sleeve. Preferably, the supporting rubber ring is arranged in a circular ring shape, and a plurality of the supporting rubber rings are provided, and the plurality of supporting rubber rings are arranged equidistantly along the axial direction of the slope grinding head, and the inner and outer sides of the plurality of supporting rubber rings are connected to the side of the cavity of the double-layer rubber sleeve. The variable spring is fixed in a double-layer rubber sleeve. One end of the variable spring is connected to the inner layer of the double-layer rubber sleeve, and the other end of the variable spring is connected to the outer layer of the double-layer rubber sleeve. Preferably, the variable springs are provided in a plurality of groups, and the plurality of groups of variable springs are arranged equidistantly along the circumference of the cylindrical grinding head. Each group of variable springs is provided with a plurality of variable springs, and the variable springs in each group are arranged equidistantly along the axial direction of the cylindrical grinding head. The outer side of the double-layer rubber sleeve is provided with a plurality of placement grooves. Preferably, the placement grooves are in a spherical segment structure, and the placement grooves are arranged in an annular manner at equal distances on the side of the double-layer rubber sleeve. The grinding particles are placed in the placement grooves, and the grinding particles are provided in plurality, and the grinding particles correspond to the placement grooves one by one; Furthermore, the double-layer rubber sleeve is built with a supporting rubber strip, which is fixed in the double-layer rubber sleeve. The supporting rubber strip is in a rectangular structure, and the two side surfaces of the supporting rubber strip are respectively connected to the inner and outer layers of the double-layer rubber sleeve. The length of the supporting rubber strip is the same as the height of the cylindrical grinding head. There are multiple supporting rubber strips, and the multiple supporting rubber strips are arranged at equal distances along the circumference of the cylindrical grinding head. The supporting rubber strips and each group of variable springs are arranged alternately; Further, the grinding particles are replaced with carbide grinding particles and super-hard abrasive particles, the carbide grinding particles are placed on the placement groove, the number of carbide grinding particles is half of the placement groove, the carbide grinding particles are evenly placed on the placement groove near the positioning rod, the super-hard abrasive particles are placed on the placement groove, the number of super-hard abrasive particles is half of the placement groove, the super-hard abrasive particles are placed on the other part of the placement groove, and the hardness of the super-hard abrasive particles is greater than that of the carbide grinding particles; The present invention also relates to a pipe internal and external grinding device, which comprises a supporting component, a transmission component, an inner wall grinding component and an outer wall grinding component. The invention is characterized in that the transmission component is arranged on the support component, the inner wall grinding component is arranged on the support component, and the outer wall grinding component is arranged on the support component. The transmission component is used to position the pipe to be ground in the up-down and forward-backward directions while driving the pipe to move left and right, and then the grinding component is used to grind the inner wall and the outer wall of the pipe. The support assembly is composed of a grinding box, a placement plate, a connecting plate, a sliding groove, a first limiting groove and a second limiting groove. The placement plate is fixed at one end of the grinding box. Preferably, the polishing box is arranged in a U-shaped configuration. A first limiting groove is provided in the middle of the placement plate, and the cross section of the first limiting groove is a cross-shaped structure. The connecting plate is fixedly placed on the polishing box, the connecting plate and the placing plate are placed in parallel, a second limiting groove is opened in the middle of the connecting plate, and the cross section of the second limiting groove is a cross-shaped structure. Preferably, the central axes of the first limiting groove and the second limiting groove are the same. The sliding groove is placed inside the grinding box. Preferably, there are two sliding grooves, and the two sliding grooves are symmetrical about the polishing box. Preferably, the sliding groove is in an equilateral trapezoidal structure with the shorter side being located inside the polishing box. The transmission assembly is composed of a transmission motor, a main transmission shaft, a secondary transmission shaft and a transmission wheel. Two transmission motors are placed on the grinding box. Preferably, the conveying motor is in an intermittent working state, and the temporary load rate of the conveying motor is 15%. Preferably, the two conveying motors rotate in the same direction and at the same speed at the same time. There are two main transmission shafts, and the two main transmission shafts correspond to the two transmission motors one by one. A transmission wheel is disposed on the main transmission shaft, and the transmission wheel and the main transmission shaft are coaxially arranged. One end of the main transmission shaft is connected to one side of the polishing box through a bearing, and the other end of the main transmission shaft is connected to the motor shaft of the corresponding transmission motor and a supporting bearing is placed between the main transmission shaft and the polishing box. Both ends of the auxiliary transmission shaft are connected to the inner side of the grinding box through bearings. Preferably, the auxiliary transmission shafts are provided in plurality, and the plurality of auxiliary transmission shafts are arranged equidistantly along the length direction of the polishing box. The secondary transmission shaft is located above the primary transmission shaft. A transmission wheel is disposed on the secondary transmission shaft, and the transmission wheel and the secondary transmission shaft are coaxially arranged. Preferably, there is a channel for accommodating the passage of the pipe between the conveying wheel disposed on the main conveying shaft and the conveying wheel disposed on the auxiliary conveying shaft. Preferably, the inner diameter of the transmission wheel increases gradually from the middle to both ends in an arc shape, and an anti-skid pad is arranged on the surface of the transmission wheel. The anti-skid pad has two layers, the inner layer connected to the transmission wheel is a sponge pad, and the outer layer in contact with the pipe is a rubber pad; The inner wall grinding assembly is composed of an inner wall grinding motor, a connecting shaft, a first limiting ring, a second limiting ring, a grinding head and grinding particles. The inner wall grinding motor is placed on the placement plate. One end of the connecting shaft is placed on the motor shaft of the inner wall grinding motor, and the connecting shaft passes through the connecting plate and is coaxially placed with the second limiting groove. The connecting shaft is provided with a first limiting ring and a second limiting ring, the connecting shaft and the first limiting ring and the second limiting ring are coaxially arranged, the first limiting ring is rotatably placed in the first limiting groove, the second limiting ring is rotatably placed in the second limiting groove, the other end of the connecting shaft is provided with a threaded hole, and the thread direction is the same as the rotation direction of the motor when it is working. Preferably, the grinding head is threadedly connected to the connecting shaft. The cross-sectional diameter of the middle section of the grinding head is greater than the width of the two ends, and the cross-sectional diameters of the two ends of the grinding head gradually decrease. The grinding head is provided with reverse threads and rotates in the opposite direction to the inner wall grinding motor when working. The grinding particles are placed on the grinding head. Preferably, the grinding particles are in multiple groups, and the multiple groups of grinding particles are arranged equidistantly along the circumference of the grinding head. A group of the grinding particles has multiple grinding particles, and the multiple grinding particles in the same group are arranged equidistantly along the axial direction of the grinding head. The outer wall grinding assembly is composed of a sliding bar, a support plate, a cavity, a hole, a protective plate, an outer wall grinding motor, a main gear, a grinding bearing, a grinding gear, a fixing ring and outer grinding particles. Sliding bars are fixedly arranged on both sides of the support plate. The outer contour of the sliding bar is the same as that of the sliding groove, and the sliding bar is slidably connected and placed in the sliding groove. Preferably, the cavity is arranged in an 8-shape, and the cavity does not penetrate the support plate. The hole is set through the support plate and is aligned with the central axis of the upper circular ring of the cavity. The protective plate is fixed on the support plate and placed vertically to the support plate. The outer wall grinding motor is placed on the support plate and under the protective plate. One end of the main gear is connected to the support plate through a bearing, and the other end of the main gear is connected to the motor shaft of the outer wall grinding motor and a support bearing is placed between the main gear and the support plate. The grinding gear is rotatably placed in the cavity and meshes with the main gear. A circular groove is opened in the middle of the grinding gear, and the external grinding particles are placed in the circular groove. The grinding gear is provided with fixing rings on both sides. The inner ring of the grinding bearing is connected to the fixed ring, and the outer ring of the grinding bearing is fixedly connected to the hole wall of the hole. There are multiple groups of external grinding particles, and the multiple groups of external grinding particles are arranged at equal distances along the circumferential direction of the inner annular surface of the grinding gear. There are multiple external grinding particles in one group, and the multiple external grinding particles in the same group are arranged at equal distances along the axial direction of the grinding gear. Further, the grinding particles are replaced by grinding rings, and the grinding rings are wound around the annular side surface of the grinding head in a threaded shape; Furthermore, an oblique grinding head is fixed on one side of the grinding head, the bottom surface of one side of the oblique grinding head is the same as the side surface of the grinding head, and the cross-sectional diameter of the side surface of the oblique grinding head gradually decreases; the first grinding column is provided with multiple groups, and the multiple groups of first grinding columns are arranged equidistantly along the axial direction of the oblique grinding head, and one group has multiple first grinding columns, and the multiple first grinding columns in the same group are arranged at equal angles along the circumferential direction of the side surface of the oblique grinding head; the second grinding column is provided with multiple groups, and the multiple groups of second grinding columns are arranged equidistantly along the axial direction of the grinding head, and one group has multiple second grinding columns, and the multiple second grinding columns in the same group are arranged equidistantly along the circumferential direction of the side surface of the grinding head; fixed blocks are fixed on both sides of the first grinding column, the fixed blocks are triangular block structures, and the triangular plane is parallel to the oblique grinding head table surface; fixed blocks are fixed on both sides of the second grinding column, the fixed blocks are triangular block structures, and the triangular plane is parallel to the oblique grinding head table surface. Beneficial Effects

[0006] 1. The easily deformable double-layer rubber sleeve enables the grinding head to adapt to pipes with different inner diameters. Pipes with different inner diameters can be effectively ground without stopping the machine, reducing the downtime due to changing the grinding head and improving overall work efficiency.

[0007] 2. The grinding head is fixed with a non-threaded connection, which can reduce the problem of thread locking caused by vibration or friction, and ensure the stability and reliability of the grinding head.

[0008] 3. The adaptive grinding structure can automatically adjust between different inner diameters of pipes, reducing the intervention of manual replacement of grinding heads, reducing labor intensity and improving the level of automation.

[0009] 4. The grinding particles are easy to replace, which reduces the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a three-dimensional structural diagram of a pipe internal and external grinding device of the present invention; Figure 2 This is a schematic structural diagram of a pipe internal and external grinding device according to the present invention; Figure 3 This is a schematic diagram of the structure of a pipe internal and external grinding device of the present invention, which only shows the top view structure of the pipe internal and external grinding device; Figure 4 This is a schematic structural diagram of a pipe internal and external grinding device according to the present invention; Figure 5 This is a three-dimensional structural diagram of a tube internal and external grinding device for grinding gears according to the present invention; Figure 6 This is a three-dimensional structural diagram of a second embodiment of a tube internal and external grinding device of the present invention, in which only the structure of the grinding head is shown; Figure 7This is a three-dimensional structural diagram of Example 3 of a pipe internal and external grinding device of the present invention, in which only the structure of the grinding head is shown.

[0011] Figure 8 A three-dimensional structural diagram of an adaptive inner wall grinding structure of a grinder according to the present invention; Fig. 9 It is a structural schematic diagram of an adaptive inner wall grinding structure of a grinder of the present invention; Fig.10 This is a three-dimensional structural diagram of an adaptive inner wall grinding structure of a grinder of the present invention, which only shows the structure of the grinding head; Fig.11 It is a structural schematic diagram of an adaptive inner wall grinding structure of a grinder of the present invention; Fig.12 It is a structural schematic diagram of Embodiment 2 of a grinder adaptive inner wall grinding structure of the present invention; Fig.13 This is a three-dimensional structural diagram of Example 3 of an adaptive inner wall grinding structure of a grinder of the present invention, in which only the structure of the grinding head is shown. Attached photos

[0012] The components include: a grinding box (1), a placement plate (2), a connecting plate (3), a sliding groove (4), a sliding bar (5), a supporting plate (6), a transmission motor (7), an inner wall grinding motor (8), a first limiting groove (9), a second limiting groove (10), an outer wall grinding motor (11), a grinding head (12), grinding particles (13), a connecting shaft (14), a second limiting ring (15), a first limiting ring (16), a secondary transmission shaft (17), a main transmission shaft (18), a protective plate (19), a transmission wheel (20), a cavity (21), a hole (22), a main gear (23), a grinding bearing (24), a grinding gear (25), outer grinding particles (26), a fixing ring ( 27), reverse thread (28), grinding ring (29), oblique grinding head (30), first grinding column (31), fixed block (32), second grinding column (33), rubber ring (34), grinding particles (35), fixed column (36), positioning hole (37), connecting hole (38), connecting groove (39), fixed groove (40), connecting rib (41), limit grinding head (42), positioning rod (43), cylindrical grinding head (44), variable spring (45), slope grinding head (46), supporting rubber ring (47), double-layer rubber sleeve (48), placement groove (49), supporting rubber strip (50), carbide grinding particles (51), superhard abrasive particles (52) DETAILED DESCRIPTION Example 1

[0013] The present invention discloses an adaptive inner wall grinding structure of a grinding machine, which comprises a fixing component and an adaptive grinding component. The fixing component comprises a connecting shaft (14), a rubber ring (34), a connecting groove (39), a fixing groove (40), a connecting rib (41), a connecting hole (38), a positioning hole (37), a positioning rod (43) and a fixing column (36). A fixing groove (40) is formed at one end of the connecting shaft (14). Preferably, the fixing groove (40) is in a cylindrical structure. The side of the fixing groove (40) is provided with a plurality of connecting grooves (39). The positioning rod (43) is composed of two cylinders with different diameters coaxially stacked together. The side of the cylinder with a smaller diameter of the positioning rod (43) is provided with a connecting rib (41). The connecting groove (39) and the connecting rib (41) correspond to each other one by one. The positioning rod (43) is slidably placed in the fixing groove (40) through the connecting rib (41) and the connecting groove (39). Preferably, the diameter of the cylinder with the smaller cross-sectional diameter of the positioning rod (43) is less than or equal to the cross-sectional diameter of the fixing groove (40), and the diameter of the cylinder with the larger cross-sectional diameter of the positioning rod (43) is larger than the cross-sectional diameter of the fixing groove (40). The connecting shaft (14) is provided with a plurality of positioning holes (37). Preferably, the plurality of positioning holes (37) are arranged equidistantly along the axial direction of the connecting shaft (14). The positioning rod (43) is provided with a plurality of connection holes (38). Preferably, the plurality of connection holes (38) are arranged equidistantly along the axial direction of the positioning rod (43). The positioning holes (37) and the connecting holes (38) correspond one to one. The fixing column (36) is plug-in-connected and arranged on the positioning hole (37), and the fixing column (36) is plug-in-connected and arranged on the connecting hole (38). Preferably, the fixing column (36) is a cylindrical structure. The rubber ring (34) is placed on the fixed column (36). Preferably, the rubber ring (34) is in a cylindrical structure, and the rubber ring (34) has a relatively large friction force. The adaptive grinding component is composed of grinding particles (35), a limit grinding head (42), a cylindrical grinding head (44), a variable spring (45), a slope grinding head (46), a supporting rubber ring (47), a double-layer rubber sleeve (48) and a placement groove (49). The position-limiting grinding head (42) is fixedly placed on the positioning rod (43), and the end of the positioning rod (43) with a larger cross-sectional diameter is connected to the position-limiting grinding head (42). Preferably, the position-limiting grinding head (42) is in the form of a truncated cone, a table surface with a smaller cross-sectional diameter of the position-limiting grinding head (42) is connected to the positioning rod (43), and the position-limiting grinding head (42) and the positioning rod (43) are coaxially arranged. One end of the cylindrical grinding head (44) is fixedly placed on the other surface of the limit grinding head (42). Preferably, the cylindrical grinding head (44) is arranged in a cylindrical shape, the cross-sectional diameter of the cylindrical grinding head (44) is the same as the maximum cross-sectional diameter of the position-limiting grinding head (42), and the cylindrical grinding head (44) and the position-limiting grinding head (42) are arranged coaxially. The slope grinding head (46) is fixedly placed on the other end of the cylindrical grinding head (44). Preferably, the sloped grinding head (46) is arranged in a truncated cone shape, the larger cross-sectional surface of the sloped grinding head (46) is connected to the other end of the cylindrical grinding head (44), and the maximum cross-sectional diameter of the sloped grinding head (46) is the same as the diameter of the cylindrical grinding head (44). The double-layer rubber sleeve (48) is placed on the cylindrical grinding head (44) and the slope grinding head (46), and corresponds to the shape of the cylindrical grinding head (44) and the slope grinding head (46). Preferably, the double-layer rubber sleeve (48) has two layers, a cavity (21) is provided inside the double-layer rubber sleeve (48) to divide the double-layer rubber sleeve (48) into an inner layer and an outer layer, the outer layer of the double-layer rubber sleeve (48) is a heat-insulating material, the cross-sectional diameter of the middle end of the double-layer rubber sleeve (48) is larger than the cross-sectional diameters of the two ends, and the cross-sectional diameters of the two ends of the double-layer rubber sleeve (48) gradually decrease. The supporting rubber ring (47) is fixedly placed in the double-layer rubber sleeve (48). Preferably, the supporting rubber ring (47) is arranged in a circular ring shape, and a plurality of the supporting rubber rings (47) are provided. The plurality of supporting rubber rings (47) are arranged equidistantly along the axial direction of the slope grinding head (46), and the inner and outer side surfaces of the plurality of supporting rubber rings (47) are connected to the side surface of the cavity (21) of the double-layer rubber sleeve (48). The variable spring (45) is fixedly placed in the double-layer rubber sleeve (48). One end of the variable spring (45) is connected to the inner layer of the double-layer rubber sleeve (48), and the other end of the variable spring (45) is connected to the outer layer of the double-layer rubber sleeve (48). Preferably, the variable springs (45) are provided in a plurality of groups, and the plurality of groups of variable springs (45) are arranged at equal distances along the circumference of the cylindrical grinding head (44); each group of variable springs (45) is provided with a plurality of variable springs, and the variable springs (45) in each group are arranged at equal distances along the axial direction of the cylindrical grinding head (44). The outer side of the double-layer rubber sleeve (48) is provided with a plurality of placement grooves (49). Preferably, the placement grooves (49) are in the shape of a spherical segment, and the placement grooves (49) are arranged in an annular manner at equal distances on the side of the double-layer rubber sleeve (48). The grinding particles (35) are placed in the placement groove (49), a plurality of the grinding particles (35) are provided, and the grinding particles (35) and the placement grooves (49) correspond one to one; When in use, the connection groove (39) and the connection rib (41) are aligned, the positioning column is inserted into the fixing groove (40) to align the positioning hole (37) and the connection hole (38), and the fixing column (36) is inserted into the positioning hole (37), so that the position between the grinding head (12) and the connecting shaft (14) can be fixed. During the grinding process, when the grinding particles (35) are in contact with the inner wall of the pipe, the inner wall of the pipe can be grinded by rotating the entire structure. When grinding pipes with different diameters, the double-layer rubber sleeve (48) is squeezed through the inner wall of the pipe. At the same time, under the action of the variable spring (45), the grinding particles (35) can always be in close contact with the inner wall of the pipe. The inner wall of the pipe can be grinded by rotating the entire structure, and the device can adapt to pipes with different inner diameters. Example 2

[0014] The difference between this embodiment and embodiment 1 is that: the double-layer rubber sleeve (48) has a built-in supporting rubber strip (50), the supporting rubber strip (50) is fixedly placed in the double-layer rubber sleeve (48), the supporting rubber strip (50) is a rectangular parallelepiped structure, the two side surfaces of the supporting rubber strip (50) are respectively connected to the inner and outer layers of the double-layer rubber sleeve (48), the length of the supporting rubber strip (50) is the same as the height of the cylindrical grinding head (44), a plurality of the supporting rubber strips (50) are provided, and the plurality of the supporting rubber strips (50) are equidistant along the circumference of the cylindrical grinding head (44). The supporting rubber strips (50) and each group of variable springs (45) are arranged alternately. When in use, the springs are subjected to uneven extrusion by the inner wall of the tube during high-speed rotation, which may cause problems such as bending and winding, thereby affecting the grinding effect and equipment stability. At the same time, the force on the inner wall by the action of the spring alone is small. The supporting rubber sleeve can increase the grinding force of the grinding particles (35) on the inner wall, ensuring that good contact can be maintained even during high-speed rotation, thereby improving the grinding efficiency and quality, and at the same time reducing the possibility of contact and winding between the springs, thereby increasing the service life; Example 3

[0015] The difference between this embodiment and embodiment 1 is that the grinding particles (35) are replaced by carbide grinding particles (51) and super-hard abrasive particles (52); the carbide grinding particles (51) are placed on the placement groove (49); the number of carbide grinding particles (51) is half of the placement groove (49); the carbide grinding particles (51) are evenly placed on the placement groove (49) near the positioning rod (43); the super-hard abrasive particles (52) are placed on the placement groove (49); the number of super-hard abrasive particles (52) is half of the placement groove (49); the super-hard The abrasive grains (52) are placed on another part of the placement groove (49), and the hardness of the super-hard abrasive grains (52) is greater than that of the carbide abrasive grains (51); when in use, the super-hard grains with greater hardness can perform preliminary grinding on the inner wall of the pipe to remove surface defects such as unevenness and burrs. After grinding, the pipe is moved so that the carbide abrasive grains (51) (35) grind the inner wall of the pipe to make the inner wall of the pipe smoother. The different hardness of the two grinding grains (35) can increase the service life of the grinding grains (35) and improve the grinding quality of the pipe; The design that the diameter of the cylinder with the smaller cross-sectional diameter of the positioning rod (43) is smaller than or equal to the cross-sectional diameter of the fixing groove (40), and the diameter of the cylinder with the larger cross-sectional diameter of the positioning rod (43) is larger than the cross-sectional diameter of the fixing groove (40) can enable the positioning rod (43) to be stably inserted into the fixing groove (40), and at the same time can increase the contact area between the positioning rod (43) and the limiting grinding head (42), thereby improving the stability of the grinding head (12); The rubber ring (34) is of cylindrical structure, and the rubber sleeve is designed with a relatively large friction force, which can prevent the fixing column (36) from falling off during operation, thereby preventing the grinding head (12) from being separated from the connecting shaft (14), thereby improving the safety of the entire device; The double-layer rubber sleeve (48) has two layers, and a cavity (21) is provided inside the double-layer rubber sleeve (48) to divide the double-layer rubber sleeve (48) into an inner layer and an outer layer. The outer layer of the double-layer rubber sleeve (48) is a heat-insulating material. The cross-sectional diameter at the middle end of the double-layer rubber sleeve (48) is larger than the width at both ends. The cross-sectional diameters at both ends of the double-layer rubber sleeve (48) are designed to gradually decrease. The heat-insulating material can prevent the heat generated during grinding from causing damage to the interior. The internal cavity (21) can increase the degree of deformation of the double-layer rubber sleeve (48) so as to adapt to pipes with more inner diameters. At the same time, the double-layer rubber sleeve (48) can be stably mounted on the grinding head (12), thereby improving the adaptability and stability of the device. The supporting rubber ring (47) is arranged in a circular ring shape. A plurality of the supporting rubber rings (47) are provided. The plurality of supporting rubber rings (47) are arranged equidistantly along the axial direction of the slope grinding head (46). The inner and outer side surfaces of the plurality of supporting rubber rings (47) are connected to the side surface of the cavity (21) of the double-layer rubber sleeve (48), so as to support the double-layer rubber sleeve (48), thereby increasing the grinding force on the inside of the pipe; The purpose is to fix the position of the grinding head (12) by the positioning groove to prevent the thread from being locked, to adapt to the inner diameter of the pipe by the easily deformable nature of the double-layer rubber sleeve (48), and to continuously grind pipes with different inner diameters without pausing the machine operation when the inner diameter changes.

[0016] It should be noted that the adaptive inner wall grinding structure is applicable to the following pipe inner and outer grinding machines: The present invention provides a pipe internal and external grinding device which is implemented as follows: The present invention provides a pipe internal and external grinding device which includes a support component, a transmission component, an inner wall grinding component and an outer wall grinding component. The invention is characterized in that the transmission component is arranged on the support component, the inner wall grinding component is arranged on the support component, and the outer wall grinding component is arranged on the support component. The transmission component is used to position the pipe to be ground in the up-down and forward-backward directions while driving the pipe to move left and right, and then the grinding component is used to grind the inner wall and the outer wall of the pipe. The support assembly is composed of a polishing box (1), a placement plate (2), a connecting plate (3), a sliding groove (4), a first limiting groove (9) and a second limiting groove (10). The placement plate (2) is fixedly placed on one end of the grinding box (1). Preferably, the polishing box (1) is arranged in a U-shaped configuration. A first limiting groove (9) is provided in the middle of the placement plate (2), and the cross section of the first limiting groove (9) is a cross-shaped structure. The connecting plate (3) is fixedly placed on the polishing box (1), the connecting plate (3) and the placement plate (2) are placed in parallel, a second limiting groove (10) is opened in the middle of the connecting plate (3), and the cross section of the second limiting groove (10) is a cross-shaped structure. Preferably, the central axis of the first limiting groove (9) and the central axis of the second limiting groove (10) are the same. The sliding groove (4) is placed inside the grinding box (1). Preferably, there are two sliding grooves (4), and the two sliding grooves (4) are symmetrical with respect to the polishing box (1). Preferably, the sliding groove (4) is in an equilateral trapezoidal structure and the shorter side is located inside the polishing box (1). The transmission assembly is composed of a transmission motor (7), a main transmission shaft (18), a secondary transmission shaft (17) and a transmission wheel (20). Two conveying motors (7) are placed on the grinding box (1). Preferably, the conveying motor (7) is in an intermittent working state, and the temporary load rate of the conveying motor (7) is 15%. Preferably, the two conveying motors (7) rotate in the same direction and at the same speed at the same time. The main transmission shafts (18) are provided with two, and the two main transmission shafts (18) correspond to the two transmission motors (7) in a one-to-one manner. A transmission wheel (20) is disposed on the main transmission shaft (18), and the transmission wheel (20) and the main transmission shaft (18) are coaxially arranged. One end of the main transmission shaft (18) is connected to one side of the grinding box (1) via a bearing, and the other end of the main transmission shaft (18) is connected to the motor shaft of the corresponding transmission motor (7) and a support bearing is disposed between the main transmission shaft (18) and the grinding box (1). Both ends of the auxiliary transmission shaft (17) are connected to the inner side of the grinding box (1) through bearings. Preferably, a plurality of auxiliary transmission shafts (17) are provided, and the plurality of auxiliary transmission shafts (17) are arranged equidistantly along the length direction of the polishing box (1). The secondary transmission shaft (17) is located above the primary transmission shaft (18). A transmission wheel (20) is disposed on the auxiliary transmission shaft (17), and the transmission wheel (20) and the auxiliary transmission shaft (17) are coaxially arranged. Preferably, there is a passage for accommodating the passage of the pipe between the conveying wheel (20) disposed on the main conveying shaft (18) and the conveying wheel (20) disposed on the auxiliary conveying shaft (17). Preferably, the inner diameter of the transmission wheel (20) increases gradually in an arc shape from the middle to both ends, and an anti-skid pad is arranged on the surface of the transmission wheel (20), wherein the anti-skid pad has two layers, the inner layer connected to the transmission wheel (20) is a sponge pad, and the outer layer in contact with the pipe is a rubber pad; The inner wall grinding assembly is composed of an inner wall grinding motor (8), a connecting shaft (14), a first limiting ring (16), a second limiting ring (15), a grinding head (12) and grinding particles (13). The inner wall grinding motor (8) is placed on the placement plate (2). One end of the connecting shaft (14) is placed on the motor shaft of the inner wall grinding motor (8), and the connecting shaft (14) passes through the connecting plate (3) and is coaxially placed with the second limiting groove (10). The connecting shaft (14) is provided with a first limiting ring (16) and a second limiting ring (15); the connecting shaft (14) and the first limiting ring (16) and the second limiting ring (15) are coaxially arranged; the first limiting ring (16) is rotatably arranged in the first limiting groove (9); the second limiting ring (15) is rotatably arranged in the second limiting groove (10); the other end of the connecting shaft (14) is provided with a threaded hole, and the direction of the thread is the same as the direction of rotation of the motor when it is working. Preferably, the grinding head (12) is threadedly connected to the connecting shaft (14). The cross-sectional diameter of the middle section of the grinding head (12) is greater than the width of the two ends, and the cross-sectional diameters of the two ends of the grinding head (12) gradually decrease. The grinding head (12) is provided with a reverse thread (28) and rotates in the opposite direction to the inner wall grinding motor (8) when in operation. The grinding particles (13) are placed on the grinding head (12). Preferably, the grinding particles (13) include multiple groups, the multiple groups of grinding particles (13) are arranged equidistantly along the circumference of the grinding head (12), and a group of the grinding particles (13) includes multiple grinding particles (13), and the multiple grinding particles (13) in the same group are arranged equidistantly along the axial direction of the grinding head (12). The outer wall grinding assembly is composed of a sliding bar (5), a support plate (6), a cavity (21), a hole (22), a protective plate (19), an outer wall grinding motor (11), a main gear (23), a grinding bearing (24), a grinding gear (25), a fixing ring (27) and outer grinding particles (26). Sliding bars (5) are fixedly mounted on both sides of the support plate (6). The outer contour of the sliding bar (5) is the same as that of the sliding groove (4), and the sliding bar (5) is slidably connected and placed in the sliding groove (4). Preferably, the cavity (21) is arranged in an 8-shape, and the cavity (21) does not penetrate the support plate (6). The hole (22) is arranged through the support plate (6) and is aligned with the central axis of the upper circular ring of the cavity (21). The protective plate (19) is fixedly placed on the support plate (6) and is placed vertically to the support plate (6). The outer wall grinding motor (11) is placed on the support plate (6) and below the protective plate (19). One end of the main gear (23) is connected to the support plate (6) via a bearing, and the other end of the main gear (23) is connected to the motor shaft of the outer wall grinding motor (11) and a support bearing is disposed between the main gear (23) and the support plate (6). The grinding gear (25) is rotatably disposed in the cavity (21) and meshes with the main gear (23). The grinding gear (25) has a circular groove in the middle, and the external grinding particles (26) are placed in the circular groove. The grinding gear (25) is provided with fixing rings (27) on both sides thereof. The inner ring of the grinding bearing (24) is connected to the fixing ring (27), and the outer ring of the grinding bearing (24) is fixedly connected to the hole wall of the hole (22). The external grinding particles (26) include multiple groups, and the multiple groups of external grinding particles (26) are arranged at equal distances along the circumferential direction of the inner annular surface of the grinding gear (25); a group of external grinding particles (26) includes multiple particles, and the multiple external grinding particles (26) in the same group are arranged at equal distances along the axial direction of the grinding gear (25); When in use, the pipe is placed in the middle of the conveying wheel (20), and the conveying motor (7) drives the conveying shaft to rotate and squeeze the pipe through the conveying wheel (20) to convey the pipe. The conveying motor (7) is in an intermittent working state. When one side of the pipe contacts the grinding head (12), it stops working. The inner wall grinding motor (8) drives the grinding head (12) to rotate, thereby grinding the inner wall of the pipe. At the same time, the outer wall grinding motor (11) drives the slave gear to rotate, so that the outer grinding particles (26) grind the outer surface of the pipe. The two work simultaneously and in opposite directions, so that the pipe can be prevented from rotating during the working process. After grinding is completed, the conveying motor (7) continues to work, driving the pipe to move a certain distance, and the grinding motor continues to work, and then the conveying and grinding work are repeated alternately until the entire pipe is polished once, and the conveying motor (7) works in the reverse direction, so that the pipe can be polished a second time until the pipe is completely away from the support plate (6); Example 2

[0017] The difference between this embodiment and embodiment 1 is that: the grinding particles (13) are replaced by grinding rings (29), and the grinding rings (29) are wound around the annular side surface of the grinding head (12) in a threaded shape; When in use, the grinding ring (29) can grind the inner wall of the pipe within a certain length range, and the cross-section of the grinding ring (29) is a semicircular structure, which is more stable and can avoid the grinding particles (13) from collapsing during the grinding process, thereby helping to improve the uniformity and smoothness of the inner wall of the pipe; Example 3

[0018] The difference between this embodiment and embodiment 1 is that an oblique grinding head (30) is fixedly arranged on one side of the grinding head (12), the bottom surface of one side of the oblique grinding head (30) is the same as the side surface of the grinding head (12), the cross-sectional diameter of the side surface of the oblique grinding head (30) gradually decreases, the first grinding column (31) is provided in a plurality of groups, the plurality of groups of first grinding columns (31) are arranged equidistantly along the axial direction of the oblique grinding head (30), a group of the first grinding columns (31) has a plurality of first grinding columns (31), and the plurality of first grinding columns (31) in the same group are arranged at equal angles along the circumferential direction of the side surface of the oblique grinding head (30), the second grinding column (33) is provided in a plurality of groups, the plurality of groups of second grinding columns (33) are arranged equidistantly along the axial direction of the grinding head (12), a group of the second grinding columns (33) has a plurality of second grinding columns (33), and the plurality of second grinding columns (33) in the same group are arranged equidistantly along the circumferential direction of the grinding head (12) ) are arranged equidistantly in the circumferential direction on the side surface, fixed blocks (32) are fixedly arranged on both sides of the first grinding column (31), the fixed blocks (32) are in a triangular block structure, and the triangular plane and the oblique grinding head (30) table are arranged in parallel, and fixed blocks (32) are fixedly arranged on both sides of the second grinding column (33), the fixed blocks (32) are in a triangular block structure, and the triangular plane and the oblique grinding head (30) table are arranged in parallel; when in use, when the inner wall of the pipe has a large area to be ground, the annular grinding head (12) cross section cannot enter, and the smaller cross-sectional portion of the front side of the oblique grinding head (30) can enter the interior of the pipe, thereby gradually expanding the range that can pass through the interior, and the fixed blocks (32) are in a stable triangular structure that can fix the grinding particles (13) to reduce the risk of breakage, and can effectively grind large pieces of foreign matter inside; The sliding groove (4) cooperates with the sliding bar (5) to limit the support plate (6), which can facilitate the removal of the support plate (6) and the replacement of the grinding head (12) and the grinding gear (25); The two conveying motors (7) have the same rotation speed and direction during the same working time, thereby avoiding squeezing or pulling the pipe and causing unnecessary damage to the pipe; The conveying motor (7) is in an intermittent working state and does not convey during the grinding process, which can effectively avoid the risk of the pipe slipping or bending; The grinding gear (25) and the grinding head (12) rotate at the same speed and in opposite directions, thereby improving the grinding efficiency and preventing the pipe from rotating on the conveying wheel (20); The inner diameter of the transmission wheel (20) increases gradually from the middle to the two ends in an arc shape, and an anti-skid pad is arranged on the surface of the transmission wheel (20). The anti-skid pad has two layers, the inner layer connected to the transmission wheel (20) is a sponge pad, and the outer layer in contact with the pipe is a rubber pad. The inner diameter of the transmission wheel (20) increases gradually from the middle to the two ends in an arc shape, which can better fit the curvature of the pipe and improve the stability during transmission. The sponge pad of the inner layer can buffer the impact of the pipe, and the rubber pad of the outer layer has good friction and can prevent the pipe from slipping during transmission. The cross-sectional diameter of the middle section of the grinding head (12) is greater than the width of the two ends. The cross-sectional diameters of the two ends of the grinding head (12) are designed to gradually decrease. The cross-sectional diameters of the two ends of the grinding head (12) gradually decrease to form a tapered structure, which can be easily inserted into the interior of the pipe and aligned with the center of the pipe. The cross-sectional diameter of the middle section of the grinding head (12) is greater than the width of the two ends. The grinding head (12) can be positioned in the interior of the pipe to ensure that the grinding head (12) remains stable inside the pipe, thereby improving the grinding effect. The purpose of being able to drive the pipe to move by the conveying wheel (20) and simultaneously grinding the inner and outer walls of the pipe by the grinding brush is achieved.

[0019] It should be noted that, unless otherwise clearly specified and limited, the terms "placed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection method such as folding connection, rivet connection, pin connection, adhesive connection and welding connection, it can also be a detachable connection method such as threaded connection, snap connection and hinge connection, or an integral connection, it can also be an electrical connection, or a direct connection, it can also be indirectly connected through an intermediate medium, it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] It should be further pointed out that, when describing the above specific embodiment, for the sake of simplicity and clarity, only the differences between the above specific embodiment and other embodiments are described, but those skilled in the art should know that the above specific embodiment itself is also an independent technical solution.

Claims

1. A self-adaptive inner wall grinding structure of a grinding machine, characterized by: The invention is composed of a fixing component and an adaptive grinding component, wherein the fixing component is composed of a connecting shaft, a rubber ring, a connecting groove, a fixing groove, a connecting rib, a connecting hole, a positioning hole, a positioning rod and a fixing column. A fixing groove is opened at one end of the connecting shaft, and a plurality of connecting grooves are opened on the side of the fixing groove. The positioning rod is composed of two coaxially superimposed cylinders with different diameters. A connecting rib is arranged on the side of the cylinder with a smaller diameter of the positioning rod. The connecting groove and the connecting rib correspond to each other one by one. The positioning rod can be slidably placed in the fixing groove through the connecting rib in cooperation with the connecting groove. A plurality of positioning holes are opened on the connecting shaft, and a plurality of connecting holes are opened on the positioning rod. The positioning holes and the connecting holes correspond to each other one by one. The fixing column is plug-in connected to the positioning hole, and the fixing column is plug-in connected to the connecting hole. The rubber ring is placed on the fixing column. The adaptive grinding component is composed of grinding particles, a limit grinding head, a cylindrical grinding head, The invention is composed of a variable spring, a slope grinding head, a supporting rubber ring, a double-layer rubber sleeve and a placement groove. The limit grinding head is fixedly placed on the positioning rod, and the end of the positioning rod with a larger cross-sectional diameter is connected to the limit grinding head. One end of the cylindrical grinding head is fixedly placed on the other surface of the limit grinding head, and the slope grinding head is fixedly placed on the other end of the cylindrical grinding head. The double-layer rubber sleeve is placed on the cylindrical grinding head and the slope grinding head, and corresponds to the shapes of the cylindrical grinding head and the slope grinding head. The supporting rubber ring is fixedly placed in the double-layer rubber sleeve, and the variable spring is fixedly placed in the double-layer rubber sleeve. One end of the variable spring is connected to the inner layer of the double-layer rubber sleeve, and the other end of the variable spring is connected to the outer layer of the double-layer rubber sleeve. A plurality of placement grooves are opened on the outer side of the double-layer rubber sleeve, and grinding particles are placed in the placement grooves. There are a plurality of grinding particles, and the grinding particles and the placement grooves correspond one to one.

2. The self-adaptive inner wall grinding structure of a grinding machine according to claim 1, characterized in that The double-layer rubber sleeve is equipped with a supporting rubber strip, which is fixed in the double-layer rubber sleeve. The supporting rubber strip is in a rectangular structure. The two side surfaces of the supporting rubber strip are respectively connected to the inner and outer layers of the double-layer rubber sleeve. The length of the supporting rubber strip is the same as the height of the cylindrical grinding head. There are multiple supporting rubber strips, and the multiple supporting rubber strips are arranged at equal distances along the circumference of the cylindrical grinding head. The supporting rubber strips and each group of variable springs are arranged alternately.

3. The self-adaptive inner wall grinding structure of a grinding machine according to claim 1, characterized in that The grinding particles are replaced with carbide grinding particles and super-hard abrasive particles. The carbide grinding particles are placed on the placement grooves, and the number of carbide grinding particles is half of the placement grooves. The carbide grinding particles are evenly placed on the placement grooves close to the positioning rods. The super-hard abrasive particles are placed on the placement grooves, and the number of super-hard abrasive particles is half of the placement grooves. The super-hard abrasive particles are placed on the other part of the placement grooves. The hardness of the super-hard abrasive particles is greater than that of the carbide grinding particles.

4. The self-adaptive inner wall grinding structure of a grinding machine according to claim 1, characterized in that The fixing groove is in a cylindrical structure, the diameter of the cylinder with a smaller cross-sectional diameter of the positioning rod is less than or equal to the cross-sectional diameter of the fixing groove, and the diameter of the cylinder with a larger cross-sectional diameter of the positioning rod is larger than the cross-sectional diameter of the fixing groove.

5. The self-adaptive inner wall grinding structure of a grinding machine according to claim 1, characterized in that The plurality of positioning holes are arranged equidistantly along the axial direction of the connecting shaft, and the plurality of connecting holes are arranged equidistantly along the axial direction of the positioning rod.

6. The self-adaptive inner wall grinding structure of a grinding machine according to claim 1, characterized in that The fixing column is in a cylindrical structure, the rubber ring is in a cylindrical structure, and the rubber ring has a relatively large friction force.

7. The self-adaptive inner wall grinding structure of a grinding machine according to claim 1, characterized in that The position limiting grinding head is in a truncated cone structure, a table with a smaller cross-sectional diameter of the position limiting grinding head is connected to the positioning rod, the position limiting grinding head and the positioning rod are coaxially arranged, the cylindrical grinding head is in a cylindrical arrangement, the cross-sectional diameter of the cylindrical grinding head is the same as the maximum cross-sectional diameter of the position limiting grinding head, and the cylindrical grinding head and the position limiting grinding head are coaxially arranged.

8. The self-adaptive inner wall grinding structure of a grinding machine according to claim 1, characterized in that The slope grinding head is arranged in a truncated cone shape, and the larger cross-sectional table of the slope grinding head is connected to the other end of the cylindrical grinding head. The maximum diameter of the cross-sectional area of ​​the slope grinding head is the same as the diameter of the cylindrical grinding head. The double-layer rubber sleeve is provided with two layers, and a cavity is provided inside the double-layer rubber sleeve to divide the double-layer rubber sleeve into an inner layer and an outer layer. The outer layer of the double-layer rubber sleeve is a heat-insulating material. The cross-sectional diameter of the middle end of the double-layer rubber sleeve is larger than the cross-sectional diameter of the two ends, and the cross-sectional diameter of the two ends of the double-layer rubber sleeve gradually decreases.

9. The self-adaptive inner wall grinding structure of a grinding machine according to claim 1, characterized in that The supporting rubber ring is arranged in a circular ring shape, and there are multiple supporting rubber rings. The multiple supporting rubber rings are arranged equidistantly along the axial direction of the slope grinding head, and the inner and outer side surfaces of the multiple supporting rubber rings are connected to the side surface of the double-layer rubber sleeve cavity. The variable springs are provided in multiple groups, and the multiple groups of variable springs are arranged equidistantly along the circumference of the cylindrical grinding head. Each group of variable springs is provided with multiple variable springs, and the variable springs in each group are arranged equidistantly along the axial direction of the cylindrical grinding head. The placement grooves are in a spherical segment-shaped structure, and the placement grooves are arranged in a ring shape with equal distances on the side of the double-layer rubber sleeve.

10. The self-adaptive inner wall grinding structure of a grinding machine according to claim 1, characterized in that The pipe internal and external grinding machine comprises a supporting assembly, a conveying assembly, an inner wall grinding assembly and an outer wall grinding assembly, wherein the conveying assembly is arranged on the supporting assembly, the inner wall grinding assembly is arranged on the supporting assembly, and the outer wall grinding assembly is arranged on the supporting assembly, and the conveying assembly is used to position the pipe to be ground in the up-down and forward-backward directions while driving the pipe to move left and right, and then the inner wall and the outer wall of the pipe are ground by the grinding assembly, and the supporting assembly is composed of a grinding box, a placing plate, a connecting plate, a sliding groove, a first limiting groove and a second limiting groove, and the placing plate is fixedly placed at one end of the grinding box, and the grinding box is in the shape of a The placing plate is provided with a first limiting groove in the middle, and the cross section of the first limiting groove is a cross-shaped structure. The connecting plate is fixedly placed on the polishing box, and the connecting plate and the placing plate are placed in parallel. The connecting plate is provided with a second limiting groove in the middle, and the cross section of the second limiting groove is a cross-shaped structure. The central axes of the first limiting groove and the second limiting groove are the same. The sliding groove is placed inside the polishing box. There are two sliding grooves, and the two sliding grooves are symmetrical about the polishing box. The sliding groove is an equilateral trapezoidal structure and the shorter side is placed inside the polishing box. The transmission assembly consists of a transmission motor, a main transmission shaft, a secondary transmission shaft and The transmission motor is composed of a transmission wheel, two transmission motors are placed on the polishing box, the transmission motor is in an intermittent working state, the temporary load rate of the transmission motor is 15%, the two transmission motors rotate in the same direction and speed at the same time, the main transmission shaft is provided with two, the two main transmission shafts correspond to the two transmission motors one by one, a transmission wheel is arranged on the main transmission shaft, the transmission wheel and the main transmission shaft are coaxially arranged, one end of the main transmission shaft is connected to one side of the polishing box through a bearing, the other end of the main transmission shaft is connected to the motor shaft of the corresponding transmission motor and a support bearing is arranged between the main transmission shaft and the polishing box, and both ends of the auxiliary transmission shaft They are all connected to the inner side of the grinding box through bearings, and there are multiple auxiliary transmission shafts, which are equidistantly arranged along the length direction of the grinding box. The auxiliary transmission shaft is located above the main transmission shaft, and a transmission wheel is arranged on the auxiliary transmission shaft. The transmission wheel and the auxiliary transmission shaft are coaxially arranged, and there is a channel for accommodating the passage of pipes between the transmission wheel arranged on the main transmission shaft and the transmission wheel arranged on the auxiliary transmission shaft. The inner diameter of the transmission wheel gradually increases in an arc shape from the middle to the two ends, and an anti-skid pad is arranged on the surface of the transmission wheel. The anti-skid pad has two layers, the inner layer connected to the transmission wheel is a sponge pad, and the outer layer in contact with the pipe is a rubber pad;The inner wall grinding assembly consists of an inner wall grinding motor, a connecting shaft, a first limiting ring, a second limiting ring, a grinding head and grinding particles. The inner wall grinding motor is placed on a placement plate, one end of the connecting shaft is placed on the motor shaft of the inner wall grinding motor, the connecting shaft passes through the connecting plate and is coaxially placed with the second limiting groove, a first limiting ring and a second limiting ring are provided on the connecting shaft, the connecting shaft and the first limiting ring and the second limiting ring are coaxially arranged, the first limiting ring is rotatably placed in the first limiting groove, the second limiting ring is rotatably placed in the second limiting groove, the other end of the connecting shaft is provided with a threaded hole and a screw thread is provided. The thread direction is the same as the rotation direction of the motor when working, the grinding head is threadedly connected and placed on the connecting shaft, the cross-sectional diameter of the middle section of the grinding head is greater than the width of the two ends, and the cross-sectional diameters of the two ends of the grinding head gradually decrease. The grinding head is provided with a reverse thread and the rotation direction is opposite to that of the inner wall grinding motor when working. The grinding particles are placed on the grinding head, and the grinding particles have multiple groups, and the multiple groups of grinding particles are arranged equidistantly along the circumference of the grinding head. A group of the grinding particles has multiple grinding particles, and the multiple grinding particles in the same group are arranged equidistantly along the axial direction of the grinding head. The outer wall grinding component consists of a sliding bar, a support plate, a cavity, a hole, a protective The support plate is composed of a plate, an outer wall grinding motor, a main gear, a grinding bearing, a grinding gear, a fixed ring and external grinding particles. Sliding bars are fixedly arranged on both sides of the support plate. The outer contour of the sliding bar is the same as the sliding groove. The sliding bar is slidably connected and placed in the sliding groove. The cavity is arranged in an 8-shape. The cavity does not penetrate the support plate. The hole penetrates the support plate and is the same as the central axis of the circular ring on the upper part of the cavity. The protective plate is fixed on the support plate and placed vertically with the support plate. The outer wall grinding motor is placed on the support plate and placed below the protective plate. One end of the main gear is connected to the support plate through a bearing. The other end of the main gear is connected to the outer wall The motor shaft of the grinding motor is connected and a support bearing is arranged between the motor shaft and the support plate. The grinding gear is rotatably arranged in the cavity and meshes with the main gear. A circular through groove is opened in the middle of the grinding gear, and the external grinding particles are arranged in the circular through groove. Fixed rings are arranged on both sides of the grinding gear respectively. The inner ring of the grinding bearing is connected to the fixed ring. The outer ring of the grinding bearing is fixedly connected to the hole wall of the hole. There are multiple groups of external grinding particles, and the multiple groups of external grinding particles are arranged at equal distances along the circumference of the inner ring surface of the grinding gear. There are multiple external grinding particles in one group, and the multiple external grinding particles in the same group are arranged at equal distances along the axial direction of the grinding gear. ;

Images