Polishing device for U-shaped bent pipe

Abstract

The utility model discloses a U-shaped bent pipe polishing device which comprises a rotating arm, a first shaft rod, a second shaft rod and a polishing device. The first driving mechanism is arranged in the rotating arm; the transmission mechanism is arranged at one end of the rotating arm and is in transmission connection with the first shaft rod, and a second shaft rod is arranged on the transmission mechanism; the expansion clamp is fixedly connected with the transmission mechanism; the locking mechanism is arranged on one side of the transmission mechanism; and the second driving mechanism is arranged at one end of the rotating arm. According to the grinding device, the turning radius can be switched according to grinding of different parts of the U-shaped bent pipe, automatic grinding is achieved, the grinding efficiency is high, the grinding quality is good, and the machining quality of the U-shaped bent pipe is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of parts grinding, in particular to a U-shaped elbow grinding device. Background Art

[0002] Many trumpet instruments have U-shaped bends. During the processing of the U-shaped bends, the outer wall needs to be polished. Manual polishing is inefficient and the polishing uniformity is poor. Figure 1 and Figure 2 As shown, since the radius R1 of the large bending section of the U-shaped bend is different from the radius R2 of the small bending section, it is necessary to solve the switching of the U-shaped bend radius during the grinding process to meet the needs of automatic grinding of the large bending section and the small bending section. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a U-shaped bend pipe grinding device that can switch the turning radius for grinding different parts of the U-shaped bend pipe, thereby realizing automatic grinding with high grinding efficiency and ensuring the processing quality of the U-shaped bend pipe.

[0004] The utility model provides a U-shaped bend pipe grinding device, comprising:

[0005] A rotating arm, one end of which is rotatably connected to the first shaft via a bearing;

[0006] a first driving mechanism, disposed in the rotating arm, for driving the first shaft to rotate;

[0007] a transmission mechanism, disposed at one end of the rotating arm with the first shaft, and in transmission connection with the first shaft, wherein the transmission mechanism is provided with a second shaft parallel to the first shaft;

[0008] An expansion clamp, fixedly connected to the transmission mechanism, for expanding and clamping the U-shaped elbow through the two end holes;

[0009] a locking mechanism, disposed on one side of the transmission mechanism, for locking the transmission mechanism so that the expansion clamp rotates about the first shaft, and unlocking the transmission mechanism so that the expansion clamp rotates about the second shaft;

[0010] The second driving mechanism is provided at one end of the rotating arm away from the first shaft, and is used to drive the rotating arm to reciprocate within a range of 140°-160° around the X-axis, and the rotating arm is parallel to the X-axis.

[0011] Furthermore, the first driving mechanism includes a main synchronous pulley arranged at one end of the rotating arm and a slave synchronous pulley arranged at the other end of the rotating arm. The slave synchronous pulley is fixedly mounted on the first shaft and is connected to the main synchronous pulley through a synchronous belt. A servo motor that drives the main synchronous pulley to rotate is fixedly arranged at the bottom of the rotating arm.

[0012] Furthermore, the transmission mechanism includes a first support plate and a second support plate;

[0013] The first support plate is arranged below the rotating arm, one end of the first support plate is rotatably connected to the first shaft via a bearing, and the other end is fixedly connected to the second shaft;

[0014] The second support plate is arranged below the first support plate, one end of which is rotatably connected to the second shaft rod through a bearing, and the other end is provided with a through slot, the bottom end of the first shaft rod extends into the through slot and is fixedly sleeved with a gear, and an arc-shaped rack is fixedly provided on the side of the through slot away from the second shaft rod, the gear is meshed with the rack, and the arc where the rack is located is coaxial with the second shaft rod.

[0015] Furthermore, the locking mechanism includes a driving cylinder fixedly arranged on one side of the first support plate, the telescopic end of the driving cylinder is fixedly provided with a connecting seat, the connecting seat is rotatably connected to a positioning key through a first pin shaft, the positioning key is rotatably connected to the first pin shaft through a long hole, the positioning key is fixedly connected to a clamping column at one end away from the first pin shaft, the positioning key is located between the first pin shaft and the clamping column and is rotatably connected to the first support plate through a second pin shaft, and a clamping groove is provided on one side of the second support plate corresponding to the clamping column.

[0016] Furthermore, the expansion clamp includes a bracket, the top of the bracket is fixedly connected to the transmission mechanism at one end of the second shaft away from the first shaft, and two groups of parallel expansion cylinders are fixedly provided at the bottom of the bracket, the axes of the two groups of expansion cylinders are perpendicular to the first shaft and are located on the same plane as the X-axis, the telescopic ends of the expansion cylinders are fixedly connected to the inner expanding core, and an expanding core sleeve is fixedly provided on the outer periphery of the inner expanding core on the bracket, and outer expanding cores are symmetrically provided on both sides of the inner expanding core passing through the expanding core sleeve, and the outer expanding core is fixedly connected to the expanding core sleeve at one end close to the expanding core sleeve.

[0017] Furthermore, the second driving mechanism includes a turntable, the axis of which is located on the X-axis, the rotating arm is fixedly connected to the turntable near the edge, and a driving motor is provided on one side of the turntable to drive it to rotate back and forth within the range of 140°-160°.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The grinding device of the present invention is provided with a rotating arm, a first driving mechanism, a transmission mechanism, a locking mechanism and an expansion clamp. The transmission mechanism and the rotating arm are connected through a first shaft, and the transmission mechanism is provided with a second shaft; after the expansion clamp clamps the U-shaped bend pipe, the locking mechanism locks the transmission mechanism, and the driving mechanism drives the U-shaped bend pipe to rotate with the first shaft as the axis; after the locking mechanism is released, the first driving mechanism drives the U-shaped bend pipe to rotate with the second shaft as the axis; the grinding device of the present application can switch the turning radius for grinding different parts of the U-shaped bend pipe, realizes automatic grinding, has high grinding efficiency and good quality, and ensures the processing quality of the U-shaped bend pipe.

[0020] It should be understood that the contents described in the summary of the utility model are not intended to limit the key or important features of the embodiments of the utility model, nor are they intended to limit the scope of the utility model. Other features of the utility model will become easier to understand through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments made with reference to the following drawings:

[0022] Figure 1 It is a structural diagram of a U-shaped elbow;

[0023] Figure 2 Schematic diagram of the top view of the U-shaped elbow;

[0024] Figure 3 It is a structural schematic diagram of the U-shaped bend grinding device;

[0025] Figure 4 It is a schematic diagram of the cross-sectional structure of the U-shaped bend grinding device;

[0026] Figure 5 is a structural schematic diagram of the second support plate;

[0027] Figure 6 It is a structural diagram of the transmission mechanism and the locking mechanism;

[0028] Figure 7 It is a structural diagram of the positioning key;

[0029] Figure 8 It is a structural diagram of the expansion clamp;

[0030] Figure 9 Schematic diagram of the cross-sectional structure of the expansion clamp.

[0031] Reference numerals in the figure: 1, rotating arm; 2, first driving mechanism; 3, transmission mechanism; 4, expansion clamp; 5, locking mechanism; 6, U-shaped bend;

[0032] 11. First shaft;

[0033] 21. Main synchronous pulley; 22. Slave synchronous pulley; 23. Synchronous belt; 24. Servo motor;

[0034] 31. Second shaft; 32. First support plate; 33. Second support plate; 34. Through slot; 35. Gear; 36. Rack; 37. Slot;

[0035] 41. Bracket; 42. Expansion cylinder; 43. Inner expansion core; 44. Expansion core sleeve; 45. Outer expansion core;

[0036] 51. Driving cylinder; 52. Connecting seat; 53. First pin; 54. Positioning key; 55. Long hole; 56. Clamping column; 57. Second pin;

[0037] 61. End hole; 62. Large curved section; 63. First small curved section; 64. Second small curved section. DETAILED DESCRIPTION

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are intended only to illustrate the relevant utility model and are not intended to limit the scope of the utility model. It should also be noted that, for ease of description, only the portions relevant to the utility model are shown in the accompanying drawings.

[0039] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] Please refer to Figures 1 to 9 The embodiment of the present utility model provides a U-shaped bend pipe grinding device, comprising:

[0041] A rotating arm 1, one end of which is rotatably connected to a first shaft 11 via a bearing;

[0042] The first driving mechanism 2 is provided in the rotating arm 1 and is used to drive the first shaft 11 to rotate;

[0043] The transmission mechanism 3 is provided at one end of the rotating arm 1 with the first shaft 11 and is in transmission connection with the first shaft 11. The transmission mechanism 3 is provided with a second shaft 31 parallel to the first shaft 11;

[0044] The expansion clamp 4 is fixedly connected to the transmission mechanism 3 and is used to expand and clamp the U-shaped bend 6 through the two end holes 71;

[0045] The locking mechanism 5 is provided on one side of the transmission mechanism 3 and is used to lock the transmission mechanism 3 so that the expansion clamp 4 rotates about the first shaft 11 and unlock the transmission mechanism 3 so that the expansion clamp 4 rotates about the second shaft 31;

[0046] The second driving mechanism is provided at one end of the rotating arm 1 away from the first shaft 11 and is used to drive the rotating arm 1 to reciprocate within a range of 140°-160° around the X-axis, and the rotating arm 1 is parallel to the X-axis.

[0047] In this embodiment, Figure 1 and Figure 2 When the outer wall of the U-shaped bend 6 shown is being polished, the U-shaped bend 6 is first grabbed by a robot and moved to the expansion clamp 4, and the U-shaped bend 6 is expanded and clamped by the expansion clamp 4. At this time, polishing sandpaper belts are arranged on the inner and outer sides of the U-shaped bend 6, and the polishing sandpaper belts are driven to rotate to polish the U-shaped bend 6.

[0048] During initial grinding, the first small curved section 63 is located between the grinding sandpaper belts. At this time, the locking mechanism 5 is in the unlocked state. The first driving mechanism 2 drives the first shaft 11 to rotate, which is then driven by the transmission mechanism 3 to drive the expansion clamp 4 to rotate about the second shaft 31 as the axis, thereby driving the U-shaped bend 6 to rotate about the second shaft 31 as the axis. At this time, the U-shaped bend 6 rotates at a small radius through the two grinding sandpaper belts, meeting the grinding requirements of the first small curved section 63.

[0049] When the connection between the first small curved section 63 and the large curved section 62 rotates to the grinding sandpaper belt, the locking mechanism 5 locks the transmission mechanism 3. At this time, the first driving mechanism 2 drives the first shaft 11 to rotate, which is then driven by the transmission mechanism 3 to drive the expansion clamp 4 to rotate around the first shaft 11 as the axis, thereby driving the U-shaped bend 6 to rotate around the first shaft 11 as the axis; at this time, the U-shaped bend 6 rotates at a large radius through the two grinding sandpaper belts to meet the grinding requirements of the large curved section 62;

[0050] When the connection between the large bending section 62 and the second small bending section 64 is rotated to the grinding sandpaper belt, the locking mechanism 5 is unlocked, and the U-shaped bend 6 is rotated again with the second shaft 31 as the axis. The U-shaped bend 6 rotates with a small radius through the two grinding sandpaper belts to meet the grinding requirements of the second small bending section 64.

[0051] The grinding device of the present application can switch the rotation radius for grinding different parts of the U-shaped bend pipe 6, realizing automatic grinding with high grinding efficiency and good quality, thereby ensuring the processing quality of the U-shaped bend pipe 6.

[0052] In a preferred embodiment, if Figure 3 and Figure 4As shown, the first driving mechanism 2 includes a main synchronous pulley 21 arranged at one end of the rotating arm 1 and a slave synchronous pulley 22 arranged at the other end of the rotating arm 1. The slave synchronous pulley 22 is fixedly mounted on the first shaft 11 and is connected to the main synchronous pulley 21 through a synchronous belt 23. A servo motor 24 is fixedly arranged at the bottom of the rotating arm 1 to drive the main synchronous pulley 21 to rotate.

[0053] In this embodiment, the servo motor 24 drives the main synchronous pulley 21 to rotate, and drives the slave synchronous pulley 22 to rotate through the synchronous belt 23, thereby realizing the driving of the first shaft 11 with high driving precision, ensuring the precise grinding of various parts of the U-shaped bend pipe 6.

[0054] In a preferred embodiment, if Figure 5 and Figure 6 As shown, the transmission mechanism 3 includes a first support plate 32 and a second support plate 33;

[0055] The first support plate 32 is disposed below the rotating arm 1, one end of which is rotatably connected to the first shaft 11 via a bearing, and the other end of which is fixedly connected to the second shaft 31;

[0056] The second support plate 33 is arranged below the first support plate 32. One end of the second support plate is rotatably connected to the second shaft 31 through a bearing, and the other end is provided with a through slot 34. The bottom end of the first shaft 11 extends into the through slot 34 and is fixedly sleeved with a gear 35. An arc-shaped rack 36 is fixedly provided on the side of the through slot 34 away from the second shaft 31. The gear 35 is engaged with the rack 36, and the arc where the rack 36 is located is coaxial with the second shaft 31.

[0057] In this embodiment, when transmission is performed by the transmission mechanism 3, the locking mechanism 5 is in the unlocked state, the first driving mechanism 2 drives the gear 35 to rotate via the first shaft 11, and with the cooperation of the rack 36, the second support plate 33 rotates around the second shaft 31 as the axis, and the second support plate 4 drives the expansion clamp 6 to rotate, thereby driving the U-shaped bend 6 to rotate around the second shaft 31 as the axis;

[0058] The locking mechanism 5 locks the second support plate 33 with the first support plate 32. At this time, the gear 35 and the rack 36 cannot rotate relative to each other. The first shaft 11 drives the first support plate 32 and the second support plate 33 to rotate with the first shaft 11 as the axis at the same time, thereby driving the U-shaped bend 6 to rotate with the first shaft 11 as the axis; the switching of the grinding turning radius is realized through the transmission switching of the transmission mechanism 3, thereby meeting the requirements of automatic grinding processing of the U-shaped bend 6.

[0059] In a preferred embodiment, if Figure 6 and Figure 7As shown, the locking mechanism 5 includes a driving cylinder 51 fixedly arranged on one side of the first support plate 32, and a connecting seat 52 is fixedly provided at the telescopic end of the driving cylinder 51. The connecting seat 52 is rotatably connected to a positioning key 54 through a first pin shaft 53. The positioning key 54 is rotatably connected to the first pin shaft 53 through a long hole 55. The end of the positioning key 54 away from the first pin shaft 53 is fixedly connected to a clamping column 56. The positioning key 54 is located between the first pin shaft 53 and the clamping column 56 and is rotatably connected to the first support plate 32 through a second pin shaft 57. A clamping slot 37 is provided on one side of the second support plate 33 corresponding to the clamping column 56.

[0060] In this embodiment, the telescopic control of the telescopic end of the driving cylinder 51 can drive the positioning key 54 to rotate with the second pin shaft 57 as the axis, so that the clamping column 56 is embedded in the clamping groove 37 to lock the second support plate 33 and the first support plate 32, or the clamping column 56 is disengaged from the clamping groove 37 to release the lock of the second support plate 33 and the first support plate 32. The locking effect is good, ensuring the switching of the rotation radius during the grinding process of the U-shaped bend pipe 6, and meeting the grinding requirements of the U-shaped bend pipe 6.

[0061] In a preferred embodiment, if Figure 3 、 Figure 8 、 Figure 9 As shown, the expansion clamp 4 includes a bracket 41, the top of the bracket 41 is fixedly connected to the transmission mechanism 3 at one end of the second shaft 31 away from the first shaft 11, and two groups of parallel expansion cylinders 42 are fixedly provided at the bottom of the bracket 41. The axes of the two groups of expansion cylinders 42 are perpendicular to the first shaft 11 and are located on the same plane as the X-axis. The telescopic ends of the expansion cylinders 42 are fixedly connected to the inner expansion core 43, and an expansion core sleeve 44 is fixedly provided on the outer periphery of the inner expansion core 43 on the bracket 41. Outer expansion cores 45 are symmetrically provided on both sides of the inner expansion core 43 passing through the expansion core sleeve 44, and the outer expansion core 45 is fixedly connected to the expansion core sleeve 44 at one end close to the expansion core sleeve 44.

[0062] In this embodiment, the inner expansion core 43 is provided with an extrusion portion whose thickness gradually decreases as it moves away from the expansion cylinder 42. A matching extrusion slope is provided on the inner side of the outer expansion core 45. To securely clamp the U-bend 6, the robot first grasps the U-bend 6 and places its two end holes 71 over the outer expansion cores 45 of the two sets of expansion cylinders 42. The telescopic ends of the expansion cylinders 42 then extend, driving the inner expansion core 43 to squeeze the outer expansion core 45, causing it to expand outward. This expands and clamps the U-bend 6 securely, without affecting the polishing of the outer wall of the U-bend 6 and achieving an effective clamping effect.

[0063] In a preferred embodiment, if Figure 3As shown, the second drive mechanism includes a turntable, the axis of which is located on the X axis, the rotating arm 1 is fixedly connected to the turntable near the edge, and a drive motor is provided on one side of the turntable to drive it to reciprocate within the range of 140°-160°

[0064] In this embodiment, the axis of the turntable is located on the X-axis, and the two sets of grinding sandpaper belts are symmetrically distributed on both sides of the X-axis. While the first driving mechanism 2 drives the U-shaped bend 6 to rotate, the driving motor drives the turntable to rotate, so that the part of the U-shaped bend 6 between the two sets of grinding sandpaper belts rotates around the X-axis, ensuring that the outer wall of the U-shaped bend 6 is fully polished.

[0065] Since sandpaper belts are provided on both the inner and outer sides of the U-bend 6, the portion of the U-bend 6 between the two sets of sandpaper belts can be fully sanded by rotating the portion of the U-bend 6 between the two sets of sandpaper belts about the X-axis within a range of 140°-160°. The sandpaper belts are flexible enough to wrap around a portion of the outer wall of the U-bend 6, so a portion of the U-bend 6 exceeding 180° can be sanded without rotating the sandpaper belts on one side 180°.

[0066] In this specification, the terms "connect," "install," and "fix" should be understood broadly. For example, "connect" can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0067] Throughout this specification, terms such as "one embodiment" or "some embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0068] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A U-shaped bend grinding device, characterized in that: include: A rotating arm (1), one end of which is rotatably connected to a first shaft (11) via a bearing; A first driving mechanism (2) is disposed in the rotating arm (1) and is used to drive the first shaft (11) to rotate; A transmission mechanism (3) is provided at one end of the rotating arm (1) having a first shaft (11) and is in transmission connection with the first shaft (11); a second shaft (31) parallel to the first shaft (11) is provided on the transmission mechanism (3); An expansion clamp (4) is fixedly connected to the transmission mechanism (3) and is used to expand and clamp the U-shaped elbow (6) through the two end holes (61); A locking mechanism (5) is provided on one side of the transmission mechanism (3), and is used for locking the transmission mechanism (3) so that the expansion clamp (4) rotates around the first shaft (11) as an axis, and for unlocking the transmission mechanism (3) so that the expansion clamp (4) rotates around the second shaft (31) as an axis; A second driving mechanism is provided at one end of the rotating arm (1) away from the first shaft (11), and is used to drive the rotating arm (1) to reciprocate within a range of 140°-160° around the X-axis, wherein the rotating arm (1) is parallel to the X-axis.

2. The U-shaped bend grinding device according to claim 1, characterized in that: The first driving mechanism (2) comprises a main synchronous pulley (21) arranged at one end of the rotating arm (1) and a slave synchronous pulley (22) arranged at the other end of the rotating arm (1); the slave synchronous pulley (22) is fixedly sleeved on the first shaft (11) and is connected to the main synchronous pulley (21) through a synchronous belt (23); and a servo motor (24) for driving the main synchronous pulley (21) to rotate is fixedly arranged at the bottom of the rotating arm (1).

3. The U-shaped bend grinding device according to claim 1, characterized in that: The transmission mechanism (3) comprises a first support plate (32) and a second support plate (33); The first support plate (32) is arranged below the rotating arm (1), one end of which is rotatably connected to the first shaft (11) via a bearing, and the other end of which is fixedly connected to the second shaft (31); The second support plate (33) is arranged below the first support plate (32), one end of which is rotatably connected to the second shaft (31) through a bearing, and the other end is provided with a through slot (34), the bottom end of the first shaft (11) extends into the through slot (34) and is fixedly sleeved with a gear (35), and a circular arc-shaped rack (36) is fixedly provided on the side of the through slot (34) away from the second shaft (31), the gear (35) is meshed with the rack (36), and the arc on which the rack (36) is located is coaxial with the second shaft (31).

4. The U-shaped bend grinding device according to claim 3, characterized in that: The locking mechanism (5) comprises a driving cylinder (51) fixedly arranged on one side of the first support plate (32); a connecting seat (52) is fixedly arranged at the telescopic end of the driving cylinder (51); the connecting seat (52) is rotatably connected to a positioning key (54) via a first pin shaft (53); the positioning key (54) is rotatably connected to the first pin shaft (53) via a long hole (55); a clamping column (56) is fixedly connected to one end of the positioning key (54) away from the first pin shaft (53); the positioning key (54) is located between the first pin shaft (53) and the clamping column (56) and is rotatably connected to the first support plate (32) via a second pin shaft (57); a clamping groove (37) is provided on one side of the second support plate (33) corresponding to the clamping column (56).

5. The U-shaped bend grinding device according to claim 1, characterized in that: The expansion clamp (4) includes a bracket (41), the top of the bracket (41) is fixedly connected to the transmission mechanism (3) at one end of the second shaft (31) away from the first shaft (11), and the bottom of the bracket (41) is fixedly provided with two groups of parallel expansion cylinders (42), the axes of the two groups of expansion cylinders (42) are perpendicular to the first shaft (11) and are located on the same plane as the X-axis, the telescopic ends of the expansion cylinders (42) are fixedly connected to the inner expansion core (43), and the bracket (41) is fixedly provided with an expansion core sleeve (44) at the outer periphery of the inner expansion core (43), and outer expansion cores (45) are symmetrically provided on both sides of the inner expansion core (43) passing through the expansion core sleeve (44), and the outer expansion core (45) is fixedly connected to the expansion core sleeve (44) at one end close to the expansion core sleeve (44).

6. The U-shaped bend grinding device according to claim 5, characterized in that: The second driving mechanism comprises a turntable, the axis of which is located on the X-axis, the rotating arm (1) is fixedly connected to the turntable near the edge, and a driving motor is provided on one side of the turntable for driving the turntable to rotate back and forth within a range of 140°-160°.

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