Double-head automatic steel pipe inner wall grinding machine

Abstract

The application relates to a double-grinding-head automatic steel pipe inner wall grinding machine, which comprises a left grinding head mechanism, a right grinding head mechanism and a workpiece rotating mechanism, the left grinding head mechanism and the right grinding head mechanism are symmetrically arranged relative to the center of the workpiece rotating mechanism, walking motors are installed on the left grinding head mechanism and the right grinding head mechanism and located on frames, circulating belts are in transmission connection with the walking motors, guide rails connected with bottom plates are arranged at the bottom ends of the circulating belts, grinding head lifting motors are fixedly installed on the frames, a worm is fixedly connected with the grinding head lifting motors through a transmission shaft, a turbine is in transmission connection with one end of the worm, a lead screw is integrally connected with the turbine through the turbine, and a supporting plate connected with a guide sleeve is arranged on the outer wall of the lead screw through balls. The application can adaptively adjust the distance and clamping area of the grinding mechanism, uniformly grind the inner wall of an object, accurately adjust the grinding angle of a sand belt and a contact wheel, and improve the grinding precision and product quality.

Description

TECHNICAL FIELD

[0001] The steel pipe inner wall polishing device technical field relates to a double-head automatic steel pipe inner wall polishing machine. BACKGROUND

[0002] The automatic polishing machine realizes full-automatic surface polishing treatment, is suitable for small workpieces, and removes burrs and improves surface gloss of metal workpieces.

[0003] The automatic polishing machine handles physical characteristics of workpieces, and according to data, can be simply divided into: a plane automatic polishing machine, a spherical surface automatic polishing machine, a curved surface automatic polishing machine, a steel belt automatic polishing machine, a profiling automatic polishing machine, a rotary body automatic polishing machine, a plastic automatic polishing machine, an acrylic automatic polishing machine and the like. SUMMARY

[0004] The double-head automatic steel pipe inner wall polishing machine can adaptively adjust the distance and clamping area of the polishing mechanism, uniformly polish the inner wall of an object, accurately adjust the polishing angle of a sand belt and a contact wheel, and improve polishing precision and product quality.

[0005] To achieve the above object, the technical scheme adopted by the present application is as follows: a double-head automatic steel pipe inner wall polishing machine comprises a left polishing head mechanism, a right polishing head mechanism and a workpiece rotating mechanism, and the left polishing head mechanism and the right polishing head mechanism are symmetrically arranged relative to the center of the workpiece rotating mechanism.

[0006] Both the left and right grinding head mechanisms are equipped with a traveling motor mounted on the frame. The traveling motor is driven by a circulating belt, the bottom of which has a guide rail connected to the base plate. A grinding head lifting motor is fixedly mounted on the frame. This motor is fixedly connected to a worm gear via a transmission shaft. One end of the worm gear meshes with a turbine, which is integrally connected to a lead screw. The outer wall of the lead screw has a support plate connected to a guide sleeve via ball bearings. The outer wall of the support plate rests on a counterweight box. Both ends of the support plate have grooves that are positioned on the inner wall of the counterweight box. One end of the counterweight box has a mounting rod connected to the first cylinder, and the bottom of the counterweight box also has... A lifting motor connected to the frame is provided on one side. A grinding head motor connected to a fixed bearing is provided on the support plate. A vertical gear connected to a rotating shaft is provided between the grinding head motor and the fixed bearing. A horizontal gear connected to the grinding head throwing rod is meshed and driven on the outer wall of the vertical gear. A grinding head adapted to the grinding head throwing rod is fixedly connected to one end. A rolling groove placed on the side plate is connected to the outer wall of the grinding head. The sanding belt on the first rolling wheel and the sanding belt on the second rolling wheel on the side plate are cyclically connected through the rotating shaft on the grinding head motor. A support plate is fixedly connected to the bottom end of the second rolling wheel. A second cylinder is fixedly connected to the bottom end of the support plate through an L-shaped connecting rod.

[0007] The workpiece rotation mechanism includes a first workpiece rotation motor and a second workpiece rotation motor. The first workpiece rotation motor and the second workpiece rotation motor are symmetrically arranged with respect to the center of the base plate, and both are connected to a drive wheel placed on the roller frame. The drive wheels rotate in the same direction and form a placement cavity connected to the steel pipe between them. The drive wheels and the driven wheels on the bracket are at the same height and the Y-axis center line is on the same axis. The bottom end of the roller frame is provided with a pulley connected to the base plate, and a fastening bolt is fixedly connected to the center of the pulley through a mounting hole.

[0008] Furthermore, the first rolling wheel and the second rolling wheel are respectively symmetrically arranged with respect to the side plate and the support plate, and the second rolling wheel is movably connected to the strip groove on the support plate, and the bottom end of the second rolling wheel is provided with an abutting part connected to the strip groove.

[0009] Furthermore, guide brackets placed outside the counterweight box are connected to both sides of the top of the frame.

[0010] Furthermore, the cover plate at the bottom of the roller frame is connected to the bracket via a transverse guide rail. Both sides of the top of the bracket are provided with anti-detachment plates connected to the cover plate. The bracket and the cover plate are provided with equidistant positioning holes of the same diameter. The two are locked together by positioning pins.

[0011] Furthermore, the motors in both the left and right grinding head mechanisms are connected to the power control cabinet.

[0012] Further, the grinding head is provided with a U-shaped plate connected with the counterweight box, and a transition wheel connected with the abrasive belt is fixedly installed at the top end of the U-shaped plate.

[0013] The technical effect of the present application is that the machine is divided into three parts: the left grinding head part, the workpiece rotating part, and the right grinding head part. The mechanical mechanisms of the left and right grinding head parts are the same. The grinding head frame is made of steel plate by welding. The frame has a sand belt grinding head tensioning mechanism, a grinding head floating mechanism, and a grinding head lifting mechanism. The grinding head support has a counterweight box inside for balancing the weight of the grinding head. The grinding head lifting mechanism uses an electric screw rod lifter as a power transmission medium. The front end of the lifter is connected with the floating mechanism, and the rear end of the screw rod lifter is connected with the floating limiting mechanism (i.e. the first cylinder connected with the counterweight box). At the same time, the lifting rear end protects and limits the position of the grinding head. The support has guide supports on both sides for restraining the grinding head and preventing it from moving erratically. The workpiece rotating position has paper bag filters at both ends, which can provide cutting fluid during polishing and filter the polishing fluid. This double-grinding-head steel pipe inner wall automatic grinding machine greatly improves the performance of the device, can adaptively adjust the distance and clamping area of the polishing mechanism, uniformly polish the inner wall of the object, accurately adjust the polishing angle of the abrasive belt and contact wheel, and improve the polishing precision and product quality. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The figure is a structural diagram of the present application.

[0015] Figure 2 The figure is an enlarged view of A of the present application. Figure 1

[0016] Figure 3 The figure is an enlarged view of B of the present application. Figure 1

[0017] Figure 4 The figure is an enlarged view of C of the present application. Figure 1

[0018] Figure 5 The figure is a connection diagram of the worm and the worm gear of the present application.

[0019] Figure 6 The figure is a top view of the present application.

[0020] Figure 7 The figure is a front view of the present application.

[0021] ​​​Reference numerals: 1-Left grinding head mechanism; 2-Right grinding head mechanism; 3-Workpiece rotation mechanism; 4-Frame; 5-Traveling motor; 6-Circulating belt; 7-Base plate; 8-Guide rail; 9-Grinding head lifting motor; 10-Worm gear; 11-Turbine; 12-Screw; 13-Support plate; 14-Counterweight box; 15-First cylinder; 16-Mounting rod; 17-Lifting motor; 18-Grinding head motor; 19-Grinding head throwing rod; 20-Grinding head; 21-First rolling wheel; 22-Second rolling wheel; 23-Support plate; 24-L-shaped connecting rod; 25-Second cylinder; 26-First workpiece rotation motor; 27-Second workpiece rotation motor; 28-Roller frame; 29-Driving wheel; 30-Driven wheel; 31-Pulley; 32-Guide bracket; 33-Bracket; 34-U-shaped plate; 35-Transition wheel. Detailed Implementation

[0022] See attached document Figures 1-7 An automatic grinding machine for the inner wall of a steel pipe with two grinding heads includes a left grinding head mechanism 1, a right grinding head mechanism 2 and a workpiece rotation mechanism 3, wherein the left grinding head mechanism 1 and the right grinding head mechanism 2 are arranged symmetrically with respect to the workpiece rotation mechanism 3.

[0023] Both the left grinding head mechanism 1 and the right grinding head mechanism 2 are equipped with a traveling motor 5 located on the frame 4. The traveling motor 5 is driven by a circulating belt 6. The bottom end of the circulating belt 6 is provided with a guide rail 8 connected to the base plate 7. A grinding head lifting motor 9 is fixedly installed on the frame 4. The grinding head lifting motor 9 is fixedly connected to a worm gear 10 through a transmission shaft. One end of the worm gear 10 is engaged with a turbine 11 and is integrally connected to a lead screw 12. The outer wall of the lead screw 12 is provided with a support plate 13 connected to a guide sleeve through ball bearings. The outer wall of the support plate 13 is placed on a counterweight box 14. Both ends of the support plate 13 are provided with sliding grooves placed on the inner wall of the counterweight box 14. One end of the counterweight box 14 is provided with a mounting rod 16 connected to the first cylinder 15. A lifting motor 17 connected to the frame 4 is provided on the other side of the bottom end of 14. A grinding head motor 18 connected to the fixed bearing is provided on the support plate 13. A vertical gear connected to the rotating shaft is provided between the grinding head motor 18 and the fixed bearing. A horizontal gear connected to the grinding head throwing rod 19 is meshed on the outer wall of the vertical gear. A grinding head 20 adapted to it is fixedly connected to one end of the grinding head throwing rod 19. A rolling groove placed on the side plate is connected to the outer wall of the grinding head 20. The sanding belt on the first rolling wheel 21 and the sanding belt on the second rolling wheel 22 are circulated and connected through the rotating shaft on the grinding head motor 18. A support plate 23 is fixedly connected to the bottom end of the second rolling wheel 22. A second cylinder 25 is fixedly connected to the bottom end of the support plate 23 through an L-shaped connecting rod 24.

[0024] The workpiece rotation mechanism 3 includes a first workpiece rotation motor 26 and a second workpiece rotation motor 27. The first workpiece rotation motor 26 and the second workpiece rotation motor 27 are symmetrically arranged with respect to the center of the base plate 7, and both are connected to a drive wheel 29 placed on a roller frame 28. The drive wheels 29 rotate in the same direction and form a placement cavity connected to a steel pipe between them. The drive wheels 29 and the driven wheels 30 on the bracket are at the same height and their Y-axis centerlines are on the same axis. The bottom end of the roller frame 28 is provided with a pulley 31 connected to the base plate 7, and a fastening bolt is fixedly connected to the center of the pulley 31 through a mounting hole. First, the workpiece rotation mechanism 3 causes the first rotating motor 26 and the second rotating motor 27 to move in opposite directions simultaneously. This allows the steel pipe to rotate in the same direction, facilitating the subsequent grinding of its inner wall by the sanding belt. In addition, the driving wheel 29 and the driven wheel 30 on the support are kept at the same height and the Y-axis center line is kept on the same axis. This is to ensure the consistency of the support height, thereby ensuring the levelness of the material when it is placed, which is beneficial to improving stability. At the same time, the roller 31 on the roller frame 28 rolls on the base plate 7, thereby changing the distance between the driving wheel 29 and the driven wheel 30, and thus adaptably adjusting the support length of different steel pipes.

[0025] In a specific embodiment of this solution, the cover plate at the bottom of the roller frame 28 is connected to the bracket 33 via a transverse guide rail. Both sides of the top of the bracket 33 are provided with anti-detachment plates connected to the cover plate. Both the bracket 33 and the cover plate are provided with equidistantly distributed positioning holes of the same diameter. The two are locked together by positioning pins. The bracket 33 moves laterally on the transverse guide rail. When it moves to the corresponding position, it can be locked together by positioning pins. In addition, the bracket on the driven wheel 30 is also set in the same way. This can change the distance between the driving wheels 29 or between the driven wheels 30, so as to adapt to the support and fixation of different steel pipe sizes.

[0026] In a specific embodiment of this solution, the first rolling wheel 21 and the second rolling wheel 22 are respectively symmetrically arranged with respect to the side plate and the support plate 23, and the second rolling wheel 22 is movably connected to the strip groove on the support plate 23. The bottom end of the second rolling wheel 22 is provided with an abutting part connected to the strip groove.

[0027] In a specific embodiment of this solution, guide brackets 32, located outside the counterweight box 14, are connected to both sides of the top of the frame 4. The motors in the left grinding head mechanism 1 and the right grinding head mechanism 2 are both connected to the power control cabinet. A U-shaped plate 34, connected to the counterweight box 14, is located directly above the grinding head throwing rod 19. A transition wheel 35, connected to the sanding belt, is fixedly installed at the top of the U-shaped plate 34. The transition wheel 35 connected to the U-shaped plate 34 provides an intermediate transition for the long-distance sanding belt, preventing the normal tension of the sanding belt from being affected due to the lack of support over a long distance, thus affecting the grinding quality.

[0028] The specific implementation of this solution is as follows, as shown in the appendix to the instruction manual. Figure 1 It can be seen that the left grinding head mechanism 1 and the right grinding head mechanism 2 can simultaneously grind both ends of the steel pipe. The grinding head mechanism first moves the frame through the walking motor 5, thereby driving the grinding head to move into the inner wall of the steel pipe for extended grinding. Then, the grinding head lifting motor 9 transmits power to the grinding head mechanism connected to the support plate 13 through the worm gear. When the grinding head motor 18 on the grinding head mechanism starts, it transmits power to the grinding head 20 connected to the grinding head throwing rod 19 through the horizontal gear connected to the vertical gear. When the grinding head 20 rotates and grinds, it can be adjusted in height to a certain extent, thereby grinding the steel pipe. The unevenness of the inner wall is effectively polished. In addition, the rotation of the grinding head can be coordinated with the rotation of the workpiece, so more effective and uniform polishing can be performed. When the grinding head motor 18 is working, its rotating shaft can simultaneously drive the rotation of the sanding belt. When the sanding belt is rotating, the second cylinder 25 pushes the support plate 23, which can make the second rolling wheel 22 be in the inclined strip groove at different positions. Therefore, the tension of the sanding belt is changed. That is, the second rolling wheel 22 moves in the inclined strip groove, thereby changing the gap between the second rolling wheels 22, thus changing the tension of the sanding belt on the rolling wheel, and realizing tension adjustment.

[0029] In a specific embodiment of this solution, one end of the counterweight box 14 is provided with an installation rod 16 connected to the first cylinder 15, and the other side of the bottom of the counterweight box 14 is provided with a lifting motor 17 connected to the frame 4. The counterweight box 14 can be further adjusted in height by the first cylinder 15, thereby driving the grinding mechanism to rise and fall. During the lifting process, the lifting motor 17 on the other side of the bottom of the counterweight box 14 can achieve synchronous lifting and falling, ensuring stable support while rising and falling together.

[0030] The specific implementation of this solution is as follows: the technical solution implemented by this patent is to perform uniform and effective grinding operations on the workpiece by rotating the workpiece itself, rotating the grinding belt and contact wheel, and adjusting the lifting of the grinding mechanism. In conjunction with the walking motor of the frame 4, it can perform extended grinding operations on the inner wall of the steel pipe.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. An automatic grinding machine for the inner wall of a double-headed steel pipe, characterized in that, It includes a left grinding head mechanism (1), a right grinding head mechanism (2) and a workpiece rotation mechanism (3), wherein the left grinding head mechanism (1) and the right grinding head mechanism (2) are arranged symmetrically with respect to the workpiece rotation mechanism (3); Both the left grinding head mechanism (1) and the right grinding head mechanism (2) are equipped with a walking motor (5) located on the frame (4). The walking motor (5) is connected to a circulating belt (6). The bottom end of the circulating belt (6) is provided with a guide rail (8) connected to the base plate (7). The grinding head lifting motor (9) is fixedly installed on the frame (4). The grinding head lifting motor (9) is fixedly connected to a worm gear (10) through a transmission shaft. One end of the worm gear (10) is engaged with a turbine (11) and is integrally connected to a lead screw (12) through the turbine (11). The outer wall of the lead screw (12) is provided with a support plate (13) connected to a guide sleeve through ball bearings. The outer wall of the support plate (13) is placed on a counterweight box (14). Both ends of the support plate (13) are provided with sliding grooves placed on the inner wall of the counterweight box (14). One end of the counterweight box (14) is provided with an mounting rod connected to the first cylinder (15). 16), and the other side of the bottom of the counterweight box (14) is provided with a lifting motor (17) connected to the frame (4), the pallet (13) is provided with a grinding head motor (18) connected to the fixed bearing, the grinding head motor (18) and the fixed bearing are provided with a vertical gear connected to the rotating shaft, the outer wall of the vertical gear meshes with a horizontal gear connected to the grinding head throwing rod (19), one end of the grinding head throwing rod (19) is fixedly connected with a grinding head (20) that is compatible with it, the outer wall of the grinding head (20) is connected with a rolling groove placed on the side plate, and the sand belt on the first rolling wheel (21) and the sand belt on the second rolling wheel (22) on the side plate are cyclically connected through the rotating shaft on the grinding head motor (18), the bottom end of the second rolling wheel (22) is fixedly connected with a support plate (23), the bottom end of the support plate (23) is fixedly connected with a second cylinder (25) through an L-shaped connecting rod (24); The workpiece rotation mechanism (3) includes a first workpiece rotation motor (26) and a second workpiece rotation motor (27). The first workpiece rotation motor (26) and the second workpiece rotation motor (27) are symmetrically arranged with respect to the center of the base plate (7), and both are connected to a drive wheel (29) placed on the roller frame (28). The drive wheels (29) rotate in the same direction and form a placement cavity connected to the steel pipe between them. The drive wheel (29) and the driven wheel (30) on the bracket are at the same height and the Y-axis center line is on the same axis. The bottom end of the roller frame (28) is provided with a pulley (31) connected to the base plate (7), and a fastening bolt is fixedly connected to the center of the pulley (31) through a mounting hole. The cover plate at the bottom of the roller frame (28) is connected to the bracket (33) via a transverse guide rail. The bracket (33) has anti-detachment plates on both sides of its top end that are connected to the cover plate. The bracket (33) and the cover plate are provided with equidistant positioning holes of the same diameter. The two are locked together by positioning pins.

2. The automatic grinding machine for the inner wall of a double-headed steel pipe according to claim 1, characterized in that, The first rolling wheel (21) and the second rolling wheel (22) are respectively symmetrically arranged with respect to the side plate and the support plate (23), and the second rolling wheel (22) is movably connected to the strip groove on the support plate (23). The bottom end of the second rolling wheel (22) is provided with an abutting part connected to the strip groove.

3. The automatic grinding machine for the inner wall of a double-headed steel pipe according to claim 1, characterized in that, The top two sides of the frame (4) are connected to guide brackets (32) placed outside the counterweight box (14).

4. The automatic grinding machine for the inner wall of a double-headed steel pipe according to claim 1, characterized in that, The motors in the left grinding head mechanism (1) and the right grinding head mechanism (2) are both connected to the power cabinet for control.

5. The automatic grinding machine for the inner wall of a double-headed steel pipe according to claim 1, characterized in that, A U-shaped plate (34) connected to a counterweight box (14) is provided directly above the grinding head throwing rod (19), and a transition wheel (35) connected to a sanding belt is fixedly installed at the top of the U-shaped plate (34).

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