Pipe bending inner wall polishing machine

Abstract

The application provides a bent pipe inner wall polishing machine, which comprises a polishing mechanism and a workpiece clamping mechanism which cooperate with each other, the polishing mechanism comprises a connecting rod 13 connected with a first driving motor and a polishing head connected to the free end of the connecting rod, and the workpiece clamping mechanism comprises at least one self-rotating clamping part installed on a base, the self-rotating clamping part comprises a bent pipe accommodating groove and a clamping jaw which are fixed on a rotating disc and cooperate with each other, when the rotating disc drives the bent pipe accommodating groove and the clamping jaw to rotate, the polishing head penetrates along the inner wall of the bent pipe through the free end of the connecting rod; compared with the prior art, the bent pipe inner wall polishing machine can automatically penetrate into the inner wall of the bent pipe, and the production efficiency is improved.

Description

Technical Field

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

[0002] Currently, most pipe fitting inner wall grinding machines use a straight rod to connect the grinding head and the power take-off unit. The power take-off unit drives the grinding head to penetrate deep into the pipe fitting to grind the inner wall. However, if the pipe fitting has a curved section, the grinding head connected to the straight rod is generally difficult to penetrate into the curved section of the inner wall to grind it. In this case, manual grinding is necessary, which is time-consuming and leads to a lag in production efficiency. Summary of the Invention

[0003] To address the shortcomings of the existing technology, the purpose of this invention is to provide a pipe inner wall grinding machine that can automatically grind the inner wall of bent pipes, thereby improving production efficiency.

[0004] The present invention achieves the above objectives as follows:

[0005] This invention discloses a grinding machine for the inner wall of a bent pipe, comprising a grinding mechanism and a workpiece clamping mechanism that cooperate with each other. The grinding mechanism includes a connecting rod connected to a first drive motor and a grinding head, the grinding head being connected to the free end of the connecting rod. The workpiece clamping mechanism includes at least one rotating clamping part mounted on a base. The rotating clamping part includes a bent pipe receiving groove and a gripper fixed on a turntable and cooperating with each other. When the turntable drives the bent pipe receiving groove and the gripper to rotate, the grinding head penetrates deeper into the inner wall of the bent pipe through the free end of the connecting rod.

[0006] Furthermore, the connecting rod is a detachable connecting rod, and the free end of the connecting rod can be a straight rod structure or a curved rod structure; the grinding mechanism also includes a mounting bracket, and a fixing block is provided on one side of the mounting bracket. The fixing block has an opening through which the connecting rod can pass, and the first drive motor is mounted on the mounting bracket; when the free end of the connecting rod is a curved rod structure, the connecting rod includes a connecting post, a bushing, and a connecting flexible shaft installed in the bushing and passing through the bushing. One end of the connecting flexible shaft is connected to the grinding head, and the other end of the connecting flexible shaft is connected to the output end of the first drive motor through the connecting post. One end of the connecting post has a first insertion hole adapted to the connecting flexible shaft, and the other end of the connecting post is inserted into the output end of the first drive motor.

[0007] Furthermore, the grinding head includes a grinding wheel, a connecting sleeve, a limiting ring, and a plug-in post. The connecting sleeve has a large countersunk hole and a small countersunk hole that communicate with each other. The inner contour of the small countersunk hole is fitted with the outer contour of the bushing. A bearing is connected to the large countersunk hole. The connecting sleeve is connected to the plug-in post through the bearing and to one end of the connecting rod through the small countersunk hole. One end of the plug-in post has a second insertion hole for connecting to the connecting flexible shaft. The other end of the plug-in post is fitted with the grinding wheel. The limiting ring is fitted to the plug-in post and is located between the grinding wheel and the connecting sleeve.

[0008] Furthermore, the self-rotating clamping part also includes a self-rotating seat, which includes a turntable, a turntable connecting block, and a turntable driver. The turntable connecting block is screwed to the bottom of the turntable, and a protruding post that mates with the inner hole of the turntable is fixedly connected to the top of the turntable connecting block. A countersunk hole is provided at the bottom of the turntable connecting block.

[0009] Furthermore, the turntable driver is movably connected to a drive shaft and a connecting disk. The drive shaft passes through the turntable driver and is also drivenly connected to the connecting disk. The connecting disk is inserted into the countersunk hole of the turntable connecting block and screwed to the turntable connecting block.

[0010] Furthermore, the workpiece clamping mechanism also includes a second drive motor. A mounting box is connected to one side of the base. The second drive motor is connected to the mounting box and located on one side of the rotating clamping part. The power output end of the second drive motor extends into the mounting box and is connected to a drive wheel. One end of the transmission shaft of the turntable driver extends into the mounting box and is also connected to a driven wheel. The drive wheel and the driven wheel are located inside the mounting box, and the drive wheel and the driven wheel are connected by a transmission belt.

[0011] Furthermore, the pressure claw includes a fixed base screwed to the turntable and a movable clamping arm rotatably connected to the fixed base. One end of the movable clamping arm is equipped with a pressure pin, and the other end of the movable clamping arm extends downward to form a rotating shaft, which is movably connected to the fixed base.

[0012] Furthermore, the drive shafts of two adjacent turntable drives are fixedly connected by a shaft connecting sleeve.

[0013] Furthermore, it also includes a stepping mechanism and a machine base, with the grinding mechanism disposed on the stepping mechanism and the workpiece clamping mechanism disposed on the machine base.

[0014] The beneficial effects of this invention are:

[0015] This invention provides a grinding machine for the inner wall of bent pipes. It features a rotatable turntable on the workpiece clamping part, and a bent pipe receiving groove and grippers that cooperate with each other on the turntable. The turntable drives the bent pipe receiving groove and grippers to rotate around its axis, causing the bent pipe located in the receiving groove to rotate as well. During rotation, the grinding head penetrates deep into the inner wall of the bent pipe through the free end of the connecting rod, thereby grinding the inner wall of the bent pipe. Compared to existing technologies, this invention, through the rotation of the self-rotating clamping part and the cooperation of the free end of the connecting rod, allows the grinding head to automatically penetrate deep into the inner wall of the bent pipe for grinding, replacing traditional manual grinding and improving the production efficiency of bent pipes. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a schematic diagram of a pipe inner wall grinding machine according to one embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the connection between the first drive motor and the connecting column in one embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the connecting rod in one embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the connection between the connecting rod and the grinding head in one embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the connection between the flexible shaft and the plug pin in one embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the inner wall of the connecting sleeve in one embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram showing the connection between the second drive motor and the turntable driver in one embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of the structure of a turntable driver in one embodiment of the present invention;

[0025] Figure 9 This is a schematic diagram of the structure of the turntable connecting block in one embodiment of the present invention;

[0026] Figure 10 This is a schematic diagram showing the connection between the turntable, the gripper, and the curved pipe receiving groove in one embodiment of the present invention.

[0027] In the diagram, 1-grinding mechanism, 2-workpiece clamping mechanism, 11-first drive motor, 12-grinding head, 13-connecting rod, 21-base, 22-second drive motor, 23-rotating clamping part, 231-gripper, 232-bent tube receiving groove, 14-mounting bracket, 15-fixing block, 151-opening, 131-connecting column, 132-shaft sleeve, 133-connecting flexible shaft, 1311-first insertion hole, 121-grinding wheel, 122-connecting sleeve, 123-limiting ring, 1 24-Plug-in pin, 1221-Large countersunk hole, 1222-Small countersunk hole, 233-Rotating seat, 2331-Turntable, 2332-Turntable connecting block, 2333-Turntable driver, 23321-Protruding post, 23322-Connecting countersunk hole, 23331-Drive shaft, 23332-Connecting disc, 24-Mounting box, 25-Drive wheel, 26-Driven wheel, 27-Drive belt, 2311-Fixed seat, 2312-Modible clamping arm, 2313-Pressure pin, 28-Shaft connecting sleeve. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this invention are only used to explain this invention and are not intended to limit this invention.

[0029] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made with respect to the claims and scope of the present invention should fall within the scope of the claims of the present invention.

[0030] Figures 1-10 The present invention illustrates the specific structure of a pipe bending inner wall grinding machine according to an embodiment of the present invention. The pipe bending inner wall grinding machine includes a grinding mechanism 1 and a workpiece clamping mechanism 2 that cooperate with each other. The grinding mechanism 1 includes a connecting rod 13 connected to a first drive motor 11 and a grinding head 12. The grinding head 12 is connected to the free end of the connecting rod 13. The workpiece clamping mechanism 2 includes at least one self-rotating clamping part 23 mounted on a base 21. The self-rotating clamping part 23 includes a pipe bending receiving groove 232 and a gripper 231 fixed on a turntable 2331 and cooperating with each other. When rotating, the grinding head 12 penetrates into the inner wall of the pipe through the free end of the connecting rod 13.

[0031] By providing a rotatable turntable 2331 on the workpiece clamping part 23, and providing a bend accommodating groove 232 and a gripper 231 that cooperate with each other on the turntable 2331, the turntable 2331 drives the bend accommodating groove 232 and the gripper 231 to rotate around the axis of the turntable 2331, causing the bend located in the bend accommodating groove 232 to rotate together. During the rotation, the grinding head 12 penetrates into the bend through the free end of the connecting rod 13 along the inner wall of the bend, thereby grinding the inner wall of the bend. Compared with the prior art, the present invention, through the rotation of the rotating clamping part 23 and the cooperation of the free end of the connecting rod 13, enables the grinding head 12 to automatically penetrate into the inner wall of the bend for grinding, replacing the traditional manual grinding and improving the production efficiency of bends.

[0032] Furthermore, the connecting rod 13 is a detachable connecting rod, which can be detachably connected to both the first drive motor 11 and the grinding head 12. The free end of the connecting rod 13 can be a straight rod structure or a curved rod structure. In this embodiment, for example... Figure 1 , Figure 2 ,as well as Figure 3 As shown, the free end of the connecting rod 13 is a curved rod structure; the grinding mechanism 1 also includes a mounting bracket 14, a fixing block 15 is provided on one side of the mounting bracket 14, and the fixing block 15 has an opening 151 through which the connecting rod 13 can pass. The first drive motor 11 is mounted on the mounting bracket 14; when the free end of the connecting rod 13 is a curved rod structure, the connecting rod 13 specifically includes a connecting post 131, a bushing 132, and a connecting flexible shaft 133 installed in the bushing 132 and passing through the bushing 132. One end of the connecting flexible shaft 133 is connected to the grinding head 12, and the other end of the connecting flexible shaft 133 is connected to the output end of the first drive motor 11 through the connecting post 131. One end of the connecting post 131 has a first insertion hole 1311 adapted to the connecting flexible shaft 133, and the other end of the connecting post 131 is inserted and connected to the output end of the first drive motor 11.

[0033] Furthermore, in this embodiment, as Figure 4 , Figure 5 as well as Figure 6As shown, the grinding head 12 includes a grinding wheel 121, a connecting sleeve 122, a limiting ring 123, and a plug-in post 124. The connecting sleeve 122 has a large countersunk hole 1221 and a small countersunk hole 1222 that are interconnected. The inner contour of the small countersunk hole 1222 is fitted with the outer contour of the bushing 132. A bearing is connected to the large countersunk hole 1221. The connecting sleeve 122 is connected to the plug-in post 124 through the bearing and to one end of the connecting rod 13 through the small countersunk hole 1222. One end of the plug-in post 124 has a second insertion hole for connecting to the connecting flexible shaft 133. The other end of the plug-in post 124 is sleeved with the grinding wheel 121. The limiting ring 123 is fitted with the plug-in post 124 and is located between the grinding wheel 121 and the connecting sleeve 122.

[0034] In this embodiment, the connecting flexible shaft 133 rotates within the bushing 132 under the drive of the first drive motor 11, thereby rotating the insertion post 124 and the grinding wheel 121. The insertion post 124 is connected to the connecting sleeve 122 via a bearing. Due to the bearing constraint, the connecting sleeve 122 and the bushing 132 connected to it cannot rotate, ensuring that the free end of the connecting rod 13 can penetrate deep into the inner wall of the bent pipe. Further, in this embodiment, as... Figure 1 , Figure 8 , Figure 9 as well as Figure 10 As shown, the rotating clamping part 23 also includes a rotating seat 233, which includes a turntable 2331, a turntable connecting block 2332, and a turntable driver 2333. The turntable connecting block 2332 is located at the bottom of the turntable 2331, and a protrusion 23321 that mates with the inner hole of the turntable 2331 is fixedly connected to the top of the turntable connecting block 2332. A connecting countersunk hole 23322 is provided at the bottom of the turntable connecting block 2332.

[0035] Furthermore, in this embodiment, as Figure 8 As shown, the turntable driver 2333 is movably connected to a drive shaft 23331 and a connecting disk 23332. The drive shaft 23331 passes through the turntable driver 2333 and is also drivenly connected to the connecting disk 23332. The connecting disk 23332 is inserted into the countersunk hole 23322 of the turntable connecting block 2332 and screwed to the turntable connecting block 2332.

[0036] Furthermore, in this embodiment, as Figure 7As shown, the workpiece clamping mechanism 2 further includes a second drive motor 22. A mounting box 24 is connected to one side of the base 21. The second drive motor 22 is connected to the mounting box 24 and is located on one side of the self-rotating clamping part 23. The power output end of the second drive motor 22 extends into the mounting box 24 and is connected to a drive wheel 25. One end of the transmission shaft 23331 of the turntable driver 2333 extends into the mounting box 24 and is also connected to a driven wheel 26. The drive wheel 25 and the driven wheel 26 are located inside the mounting box 24. The drive wheel 25 and the driven wheel 26 are connected by a transmission belt 27.

[0037] Furthermore, in this embodiment, as Figure 10 As shown, the pressure claw 231 includes a fixed base 2311 screwed to the turntable 2331 and a movable clamping arm 2312 rotatably connected to the fixed base 2311. One end of the movable clamping arm 2312 is equipped with a pressure pin 2313, and the other end of the movable clamping arm 2312 extends downward to form a rotating shaft, which is rotatably connected to the fixed base 2311.

[0038] Furthermore, in this embodiment, as Figure 8 As shown, a plurality of self-rotating clamping parts 23 are installed on the base 21 to achieve batch grinding. The transmission shafts 23331 on two adjacent turntable drivers 2333 are connected by a shaft connecting sleeve 28 to transmit the driving force output by the first drive motor 11 to each self-rotating clamping part 23.

[0039] Furthermore, the pipe bending inner wall grinding machine also includes a stepping mechanism and a base (not shown in the figure). The workpiece clamping mechanism 2 is mounted on the base, and the grinding mechanism 1 is actually mounted on the stepping mechanism, which drives the grinding mechanism 1 to move horizontally. When processing the pipe bending, a connecting rod 13 with a bent rod-shaped free end can be used to connect the first drive motor 11 to the grinding head 12, and the grinding head 12 can be mounted at the free end of the mesh installation. The pipe to be processed is clamped in the pipe bending receiving groove, and the stepping mechanism drives the grinding mechanism 1 to approach the workpiece clamping mechanism 2. Then, the second drive motor 21 is started, causing the self-rotating clamping part 23 to rotate, driving the pipe bending on the pipe bending receiving groove 232 to rotate around the turntable 2331. Thanks to the bent rod-shaped structure of the free end of the connecting rod 13, the grinding head 12 can penetrate deep into the inner wall of the pipe bending when the pipe bending rotates, thus grinding the inner wall of the pipe bending in one go. Of course, a free rod with a straight rod structure can also be used. The connecting rod at one end connects the first drive motor 11 and the grinding head 12. When a connecting rod 13 with a straight rod structure at the free end is used, the grinding head 12 is installed at the straight rod structure at the free end of the connecting rod 13. Similarly, the stepping mechanism is first controlled to move the grinding mechanism 1 to one side of the workpiece clamping part 23. Then, the second drive motor 22 is activated, and the turntable 2331 drives the bent tube receiving groove 232 and the gripper 231 to rotate. During rotation, the grinding head 12 extends into... The inner wall of the bent pipe is polished. The turntable 2331 continues to rotate until the polishing head 12 can no longer penetrate. Then, the polishing head 12 is controlled to separate from the bent pipe, and the polishing mechanism 1 is controlled to move horizontally using the stepping mechanism. At the same time, the self-rotating clamping part 23 is controlled to rotate in the opposite direction so that the polishing head 12 connects with the other end of the bent pipe. After that, the self-rotating clamping part 23 is controlled to continue rotating in the opposite direction, and the polishing head 12 penetrates into the inner wall of the bent pipe from the other end of the bent pipe to continue polishing the remaining part of the inner wall of the bent pipe.

Claims

1. A grinding machine for the inner wall of a bent pipe, characterized in that: The system includes a grinding mechanism (1) and a workpiece clamping mechanism (2) that cooperate with each other. The grinding mechanism (1) includes a connecting rod (13) connected to a first drive motor (11) and a grinding head (12), which is connected to the free end of the connecting rod (13). The workpiece clamping mechanism (2) includes at least one self-rotating clamping part (23) mounted on a base (21). The self-rotating clamping part (23) includes a bent tube receiving groove (232) and a clamping jaw (231) fixed on a turntable (2331) and cooperating with each other. When the turntable (2331) drives the bent tube receiving groove (232) and the clamping jaw (231) to rotate, the grinding head (12) passes through the... The free end of the connecting rod (13) extends deep into the inner wall of the bent pipe; the connecting rod (13) is a detachable connecting rod, and the free end of the connecting rod (13) is a straight rod structure or a curved rod structure; the grinding mechanism (1) also includes a mounting bracket (14), and a fixing block (15) is provided on one side of the mounting bracket (14). The fixing block (15) has an opening (151) through which the connecting rod (13) can pass. The first drive motor (11) is mounted on the mounting bracket (14); when the free end of the connecting rod (13) is a curved rod structure, the connecting rod (13) includes a connecting post (131), a bushing (132), and a rod installed in the bushing (132) and passing through the bushing (13). 2) A connecting flexible shaft (133) is connected at one end to the grinding head (12), and at the other end to the output end of the first drive motor (11) via a connecting post (131). One end of the connecting post (131) is provided with a first insertion hole (1311) adapted to the connecting flexible shaft (133), and the other end of the connecting post (131) is inserted into the output end of the first drive motor (11). The grinding head (12) includes a grinding wheel (121), a connecting sleeve (122), a limiting ring (123), and an insertion post (124). The connecting sleeve (122) has a large countersunk hole that is interconnected with each other. The bushing (132) has a large countersunk hole (1221) and a small countersunk hole (1222). The inner contour of the small countersunk hole (1222) is fitted with the outer contour of the bushing (132). The large countersunk hole (1221) is connected to a bearing. The connecting sleeve (122) is connected to the plug-in post (124) through the bearing and to one end of the connecting rod (13) through the small countersunk hole (1222). One end of the plug-in post (124) has a second insertion hole for connecting to the connecting flexible shaft (133). The other end of the plug-in post is fitted with the grinding wheel (121). The limiting ring (123) is fitted and connected to the plug-in post (124) and is located between the grinding wheel (121) and the connecting sleeve (122).The rotating clamping part (23) further includes a rotating base (233), which includes a turntable (2331), a turntable connecting block (2332), and a turntable driver (2333). The turntable connecting block (2332) is screwed to the bottom of the turntable (2331), and a protruding post (23321) that mates with the inner hole of the turntable (2331) is fixedly connected to the top of the turntable connecting block (2332). A countersunk hole (23322) is provided at the bottom of the turntable connecting block (2332).

2. The pipe bending inner wall grinding machine according to claim 1, characterized in that: The turntable driver (2333) is movably connected to a drive shaft (23331) and a connecting disk (23332). The drive shaft (23331) passes through the turntable driver (2333) and is also drivenly connected to the connecting disk (23332). The connecting disk (23332) is inserted into the countersunk hole (23322) of the turntable connecting block (2332) and screwed to the turntable connecting block (2332).

3. The pipe bending inner wall grinding machine according to claim 2, characterized in that: The workpiece clamping mechanism (2) further includes a second drive motor (22). A mounting box (24) is connected to one side of the base (21). The second drive motor (22) is connected to the mounting box (24) and located on one side of the self-rotating clamping part (23). The power output end of the second drive motor (22) extends into the mounting box (24) and is connected to a drive wheel (25). One end of the drive shaft (23331) of the turntable driver (2333) extends into the mounting box (24) and is also connected to a driven wheel (26). The drive wheel (25) and the driven wheel (26) are located in the mounting box (24). The drive wheel (25) and the driven wheel (26) are connected by a transmission belt (27).

4. The pipe bending inner wall grinding machine according to claim 3, characterized in that: The clamping claw (231) includes a fixed base (2311) screwed to the turntable (2331) and a movable clamping arm (2312) rotatably connected to the fixed base (2311). One end of the movable clamping arm (2312) is equipped with a clamping pin (2313), and the other end of the movable clamping arm (2312) extends downward to form a rotating shaft, which is movably connected to the fixed base (2311).

5. The pipe bending inner wall grinding machine according to claim 4, characterized in that: The drive shafts (23331) of two adjacent turntable drives (2333) are fixedly connected by a shaft connecting sleeve (28).

6. A pipe bending inner wall grinding machine according to any one of claims 1-5, characterized in that: It also includes a stepping mechanism and a base, wherein the grinding mechanism (1) is disposed on the stepping mechanism and the workpiece clamping mechanism (2) is disposed on the base.

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