A U-bend pipe polishing device

Abstract

The application discloses a U-shaped bent pipe polishing device, which comprises a rotating arm, a driving mechanism, a first supporting plate, a second supporting plate and a locking mechanism. One end of the rotating arm is connected with a first shaft rod. The driving mechanism is arranged in the rotating arm. One end of the first supporting plate is rotationally connected with the first shaft rod, and the other end of the first supporting plate is connected with a second shaft rod. One end of the second supporting plate is rotationally connected with the second shaft rod, and the other end of the second supporting plate is provided with a through slot. The bottom end of the first shaft rod is inserted into the through slot and fixedly sleeved with a gear. A gear rack is fixedly arranged on one side of the through slot. The locking mechanism is fixedly arranged on one side of the first supporting plate. The expansion clamp is fixedly connected with the second supporting plate. The polishing device can switch the rotary radius according to the polishing of different parts of the U-shaped bent pipe, realizes automatic polishing, has high polishing efficiency and good quality, and ensures the machining quality of the U-shaped bent pipe.

Description

Technical Field

[0001] This invention relates to the field of parts grinding technology, and in particular to a U-shaped bend grinding device. Background Technology

[0002] Many horn-type musical instruments feature U-shaped bends. The outer wall of these bends needs to be sanded during manufacturing. Manual sanding is inefficient and produces uneven results. Mechanical sanding, on the other hand, is much more efficient. 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 problem of switching the turning radius of the U-shaped bend during the grinding process in order to meet the needs of automatic grinding of the large bending section and the small bending section. Summary of the Invention

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

[0004] The present invention provides a U-shaped pipe grinding device, comprising:

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

[0006] A drive mechanism, disposed within the rotating arm, is used to drive the first shaft to rotate;

[0007] A first support plate is disposed below the rotating arm. One end of the plate is rotatably connected to the first shaft via a bearing, and the other end is fixedly connected to a second shaft, which is parallel to the first shaft.

[0008] The second support plate is located below the first support plate. One end of the plate is rotatably connected to the second shaft via a bearing, and the other end is provided with a through groove. The bottom end of the first shaft extends into the through groove and is fixedly sleeved with a gear. An arc-shaped rack is fixedly provided on the side of the through groove away from the second shaft. The gear meshes with the rack, and the arc of the rack is coaxial with the second shaft.

[0009] A locking mechanism is fixedly disposed on one side of the first support plate, used to lock the second support plate to the first support plate, and to release the lock between the second support plate and the first support plate;

[0010] An expansion clamp is located below the second support plate and is fixedly connected to the second support plate. It is used to expand and clamp the U-shaped bend through the two end holes.

[0011] Furthermore, the drive mechanism includes a main synchronous pulley disposed at one end of the rotating arm and a secondary synchronous pulley disposed at the other end of the rotating arm. The secondary synchronous pulley is fixedly sleeved on the first shaft and is connected to the main synchronous pulley via a synchronous belt. A servo motor for driving the main synchronous pulley to rotate is fixedly disposed at the bottom of the rotating arm.

[0012] Furthermore, the locking mechanism includes a drive cylinder fixedly disposed on one side of the first support plate. A connecting seat is fixedly disposed on the telescopic end of the drive cylinder. A positioning key is rotatably connected to the connecting seat through a first pin. The positioning key is rotatably connected to the first pin through an elongated hole. A locking pin is fixedly connected to the end of the positioning key away from the first pin. The positioning key is rotatably connected to the first support plate through a second pin located between the first pin and the locking pin. A locking groove is opened on one side of the second support plate corresponding to the locking pin.

[0013] Furthermore, the expansion clamp includes a bracket, the top of which is fixedly connected to the second support plate at the end of the second shaft away from the first shaft. Two sets of parallel expansion cylinders are fixedly arranged at the bottom of the bracket. The axis of the expansion cylinder is perpendicular to the first shaft. An inner expansion core is fixedly connected to the telescopic end of the expansion cylinder. An expansion core sleeve is fixedly arranged on the bracket at the outer periphery of the inner expansion core. Outer expansion cores are symmetrically arranged on both sides of the inner expansion core passing through the expansion core sleeve. The end of the outer expansion core near the expansion core sleeve is fixedly connected to the expansion core sleeve.

[0014] Furthermore, a turntable is provided at the end of the rotating arm away from the first shaft. The rotating arm is fixedly connected to the turntable near its edge. The rotating arm is parallel to the axis of the turntable. The axes of the two sets of tensioning cylinders are located on the same plane as the axis of the turntable. A drive motor is provided on one side of the turntable to drive it to reciprocate within the range of 140°-160°.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The grinding device of this invention includes a rotating arm, a driving mechanism, a first support plate, a second support plate, a locking mechanism, and a tightening clamp. The first support plate is rotatably connected to the rotating arm via a first shaft, and the second support plate is rotatably connected to the first support plate via a second shaft. A gear and rack structure is provided between the first shaft and the second support plate. After the tightening clamp holds the U-shaped bend, the locking mechanism locks the first and second support plates, and the driving mechanism drives the U-shaped bend to rotate around the first shaft. After the locking mechanism is released, the driving mechanism drives the U-shaped bend to rotate around the second shaft. The grinding device of this application can switch the rotation radius for grinding different parts of the U-shaped bend, realizing automatic grinding with high efficiency and good quality, ensuring the processing quality of the U-shaped bend.

[0017] It should be understood that the description in the Summary of the Invention is not intended to limit the key or essential features of the embodiments of the present invention, nor is it intended to restrict the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0018] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the U-shaped bend.

[0020] Figure 2 This is a top view of the U-shaped bend.

[0021] Figure 3 A schematic diagram of a U-shaped pipe grinding device;

[0022] Figure 4 A cross-sectional structural diagram of a U-shaped pipe grinding device;

[0023] Figure 5 This is a schematic diagram of the second support plate.

[0024] Figure 6 This is a schematic diagram of the locking mechanism;

[0025] Figure 7 This is a schematic diagram of the locating key structure;

[0026] Figure 8 This is a schematic diagram of the expansion clamp.

[0027] Figure 9 This is a cross-sectional schematic diagram of the expansion clamp.

[0028] The following are the labels in the diagram: 1. Rotating arm; 2. Drive mechanism; 3. First support plate; 4. Second support plate; 5. Locking mechanism; 6. Tension clamp; 7. U-shaped bend.

[0029] 11. First shaft;

[0030] 21. Main synchronous pulley; 22. Driven synchronous pulley; 23. Synchronous belt; 24. Servo motor;

[0031] 31. Second shaft;

[0032] 41. Through groove; 42. Gear; 43. Rack; 44. Slot;

[0033] 51. Drive cylinder; 52. Connecting seat; 53. First pin; 54. Positioning key; 55. Long hole; 56. Locking pin; 57. Second pin;

[0034] 61. Bracket; 62. Expansion cylinder; 63. Inner expansion core; 64. Expansion core sleeve; 65. Outer expansion core;

[0035] 71. End hole; 72. Large bend section; 73. First small bend section; 74. Second small bend section. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] Please refer to Figures 1-9 An embodiment of the present invention provides a U-shaped pipe grinding device, comprising:

[0039] Rotating arm 1, one end of which is rotatably connected to the first shaft 11 via a bearing;

[0040] Drive mechanism 2 is located inside rotating arm 1 and is used to drive the first shaft 11 to rotate;

[0041] The first support plate 3 is located below the rotating arm 1. One end of the plate is rotatably connected to the first shaft 11 via a bearing, and the other end is fixedly connected to the second shaft 31, which is parallel to the first shaft 11.

[0042] The second support plate 4 is located below the first support plate 3. One end of the plate is rotatably connected to the second shaft 31 via a bearing, and the other end is provided with a through groove 41. The bottom end of the first shaft 11 extends into the through groove 41 and is fixedly sleeved with a gear 42. An arc-shaped rack 43 is fixedly provided on the side of the through groove 41 away from the second shaft 31. The gear 42 meshes with the rack 43, and the arc of the rack 43 is coaxial with the second shaft 31.

[0043] The locking mechanism 5 is fixedly installed on one side of the first support plate 3, and is used to lock the second support plate 4 to the first support plate 3, and to release the lock between the second support plate 4 and the first support plate 3.

[0044] The expansion clamp 6 is located below the second support plate 4 and is fixedly connected to the second support plate 4. It is used to expand and clamp the U-shaped bend 7 through the two end holes 71.

[0045] In this embodiment, for example Figure 1 and Figure 2 When the outer wall of the U-shaped bend 7 shown is being polished, the robot first grabs the U-shaped bend 7 and moves it to the expansion clamp 6. The expansion clamp 6 then expands and clamps the U-shaped bend 7. At this time, sandpaper belts are arranged on both the inner and outer sides of the U-shaped bend 7. The sandpaper belts are driven to rotate to polish the U-shaped bend 7.

[0046] During the initial polishing, the first small curved section 73 is located between the sanding sandpaper strips. At this time, the locking mechanism 5 is in the unlocked state. The drive mechanism 2 drives the gear 42 to rotate through the first shaft 11. With the cooperation of the rack 43, the second support plate 4 rotates around the second shaft 31. The second support plate 4 drives the expansion clamp 6 to rotate, thereby driving the U-shaped bend 7 to rotate around the second shaft 31. The U-shaped bend 7 rotates with a small radius and passes through the two sanding sandpaper strips to meet the polishing requirements of the first small curved section 73.

[0047] When the connection between the first small bending section 73 and the large bending section 72 rotates to the sanding sandpaper belt, the locking mechanism 5 locks the second support plate 4 and the first support plate 3. At this time, the gear 42 and the rack 43 cannot rotate relative to each other. The first shaft 11 drives the first support plate 3 and the second support plate 4 to rotate simultaneously around the first shaft 11, thereby driving the U-shaped bend 7 to rotate around the first shaft 11. The U-shaped bend 7 rotates with a large radius and passes through the two sanding sandpaper belts to meet the sanding requirements of the large bending section 72.

[0048] When the connection between the large curved section 72 and the second small curved section 74 rotates to the sanding paper belt, the locking mechanism 5 is unlocked, and the U-shaped bend 7 rotates again around the second shaft 31. The U-shaped bend 7 rotates with a small radius to pass through the two sanding paper belts, satisfying the sanding requirements of the second small curved section 74.

[0049] The grinding device of this application has a switchable rotation radius for grinding different parts of the U-shaped bend 7, realizing automatic grinding with high efficiency and good quality, thus ensuring the processing quality of the U-shaped bend 7.

[0050] In a preferred embodiment, such as Figure 3 and Figure 4 As shown, the drive mechanism 2 includes a main synchronous pulley 21 disposed at one end of the rotating arm 1 and a secondary synchronous pulley 22 disposed at the other end of the rotating arm 1. The secondary 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. A servo motor 24 for driving the main synchronous pulley 21 to rotate is fixedly disposed at the bottom of the rotating arm 1.

[0051] In this embodiment, the servo motor 24 drives the main synchronous pulley 21 to rotate, and drives the secondary synchronous pulley 22 to rotate through the synchronous belt 23, thereby realizing the driving of the first shaft 11. The driving precision is high, ensuring the accurate grinding of each part of the U-shaped bend 7.

[0052] In a preferred embodiment, such as Figure 6 and Figure 7 As shown, the locking mechanism 5 includes a drive cylinder 51 fixedly mounted on one side of the first support plate 3. A connecting seat 52 is fixedly mounted on the telescopic end of the drive cylinder 51. A positioning key 54 is rotatably connected to the connecting seat 52 via a first pin 53. The positioning key 54 is rotatably connected to the first pin 53 via an elongated hole 55. A locking pin 56 is fixedly connected to the end of the positioning key 54 away from the first pin 53. The positioning key 54 is rotatably connected to the first support plate 3 via a second pin 57 located between the first pin 53 and the locking pin 56. A locking groove 44 is provided on one side of the second support plate 4 corresponding to the locking pin 56.

[0053] In this embodiment, the extension and retraction control of the extension and retraction end of the drive cylinder 51 can drive the positioning key 54 to rotate around the second pin 57, thereby causing the locking post 56 to be inserted into the locking groove 44 to lock the second support plate 4 and the first support plate 3, or to disengage the locking post 56 from the locking groove 44 to release the locking between the second support plate 4 and the first support plate 3. The locking effect is good, ensuring the switching of the turning radius during the grinding of the U-shaped bend 7 and meeting the grinding requirements of the U-shaped bend 7.

[0054] In a preferred embodiment, such as Figure 3 , Figure 8 , Figure 9As shown, the expansion clamp 6 includes a bracket 61. The top of the bracket 61 is fixedly connected to the second support plate 4 at the end of the second shaft 31 away from the first shaft 11. Two sets of parallel expansion cylinders 62 are fixedly installed at the bottom of the bracket 61. The axis of the expansion cylinder 62 is perpendicular to the first shaft 11. An inner expansion core 63 is fixedly connected to the telescopic end of the expansion cylinder 62. An expansion core sleeve 64 is fixedly installed on the bracket 61 on the outer periphery of the inner expansion core 63. Outer expansion cores 65 are symmetrically arranged on both sides of the inner expansion core 63 passing through the expansion core sleeve 64. The end of the outer expansion core 65 near the expansion core sleeve 64 is fixedly connected to the expansion core sleeve 64.

[0055] In this embodiment, the inner expansion core 63 is provided with a pressing part whose thickness gradually decreases in the direction away from the tensioning cylinder 62, and the inner side of the outer expansion core 65 is provided with a matching pressing slope. When fixing and clamping the U-shaped bend 7, the robot first grasps the U-shaped bend 7 and puts its two end holes 71 onto the outer expansion cores 65 of the two sets of tensioning cylinders 62 respectively. Then, the telescopic end of the tensioning cylinder 62 extends, causing the inner expansion core 63 to press the outer expansion core 65, causing the outer expansion core 65 to expand outward, thereby tightening and clamping the U-shaped bend 7, fixing it firmly, and not affecting the grinding process of the outer wall of the U-shaped bend 7, with good clamping effect.

[0056] In a preferred embodiment, such as Figure 3 As shown, a turntable is provided at the end of the rotating arm 1 away from the first shaft 11. The rotating arm 1 is fixedly connected to the turntable near the edge. The rotating arm 1 is parallel to the axis of the turntable. The axes of the two sets of tensioning cylinders 62 are on the same plane as the axis of the turntable. A drive motor is provided on one side of the turntable to drive it to reciprocate within the range of 140°-160°.

[0057] In this embodiment, the axis of the turntable is the X-axis, and two sets of sanding paper belts are symmetrically distributed on both sides of the X-axis. While the drive mechanism 2 drives the U-shaped bend 7 to rotate, the drive motor drives the turntable to rotate, so that the U-shaped bend 7, located between the two sets of sanding paper belts, rotates around the X-axis, ensuring that the outer wall of the U-shaped bend 7 is fully sanded.

[0058] Because sandpaper strips are installed on both the inner and outer sides of the U-shaped bend 7, the portion of the U-shaped bend 7 between the two sets of sandpaper strips can be rotated back and forth within a range of 140°-160° around the X-axis to achieve full sanding of the U-shaped bend 7. The sandpaper strips have a certain degree of flexibility and can wrap around a portion of the outer wall of the U-shaped bend 7, so it is not necessary to rotate the sandpaper strip on the 180° side to sand the area of ​​the U-shaped bend 7 beyond 180°.

[0059] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0060] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions 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 one or more embodiments or examples.

[0061] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A U-shaped pipe grinding device, characterized in that, include: A rotating arm (1) has a first shaft (11) rotatably connected to one end via a bearing; A drive mechanism (2) is disposed inside the rotating arm (1) and is used to drive the first shaft (11) to rotate; The first support plate (3) is located below the rotating arm (1). One end of the plate is rotatably connected to the first shaft (11) via a bearing, and the other end is fixedly connected to the second shaft (31). The second shaft (31) is parallel to the first shaft (11). The second support plate (4) is located below the first support plate (3). One end of the plate is rotatably connected to the second shaft (31) via a bearing, and the other end is provided with a through groove (41). The bottom end of the first shaft (11) extends into the through groove (41) and is fixedly fitted with a gear (42). An arc-shaped rack (43) is fixedly provided on the side of the through groove (41) away from the second shaft (31). The gear (42) meshes with the rack (43), and the arc of the rack (43) is coaxial with the second shaft (31). The locking mechanism (5) is fixedly disposed on one side of the first support plate (3) for locking the second support plate (4) to the first support plate (3) and for releasing the locking between the second support plate (4) and the first support plate (3); An expansion clamp (6) is located below the second support plate (4) and is fixedly connected to the second support plate (4) for expansion clamping through the two end holes (71) of the U-shaped bend (7).

2. The U-shaped pipe grinding device according to claim 1, characterized in that, The drive mechanism (2) includes a main synchronous pulley (21) disposed at one end of the rotating arm (1) and a secondary synchronous pulley (22) disposed at the other end of the rotating arm (1). The secondary synchronous pulley (22) is fixedly sleeved on the first shaft (11) and is connected to the main synchronous pulley (21) via a synchronous belt (23). A servo motor (24) for driving the main synchronous pulley (21) to rotate is fixedly disposed at the bottom of the rotating arm (1).

3. The U-shaped pipe grinding device according to claim 1, characterized in that, The locking mechanism (5) includes a drive cylinder (51) fixedly disposed on one side of the first support plate (3). A connecting seat (52) is fixedly disposed on the telescopic end of the drive cylinder (51). A positioning key (54) is rotatably connected to the connecting seat (52) through a first pin (53). The positioning key (54) is rotatably connected to the first pin (53) through an elongated hole (55). A locking pin (56) is fixedly connected to one end of the positioning key (54) away from the first pin (53). The positioning key (54) located between the first pin (53) and the locking pin (56) is rotatably connected to the first support plate (3) through a second pin (57). A locking groove (44) is opened on one side of the second support plate (4) corresponding to the locking pin (56).

4. The U-shaped pipe grinding device according to claim 1, characterized in that, The expansion clamp (6) includes a bracket (61). The top of the bracket (61) is fixedly connected to the second support plate (4) at the end of the second shaft (31) away from the first shaft (11). Two sets of parallel expansion cylinders (62) are fixedly arranged at the bottom of the bracket (61). The axis of the expansion cylinder (62) is perpendicular to the first shaft (11). An inner expansion core (63) is fixedly connected to the telescopic end of the expansion cylinder (62). An expansion core sleeve (64) is fixedly arranged on the bracket (61) at the outer periphery of the inner expansion core (63). An outer expansion core (65) is symmetrically arranged on both sides of the inner expansion core (63) passing through the expansion core sleeve (64). The end of the outer expansion core (65) close to the expansion core sleeve (64) is fixedly connected to the expansion core sleeve (64).

5. The U-shaped pipe grinding device according to claim 4, characterized in that, A turntable is provided at one end of the rotating arm (1) away from the first shaft (11). The rotating arm (1) is fixedly connected to the turntable near its edge. The rotating arm (1) is parallel to the axis of the turntable. The axes of the two sets of expansion cylinders (62) are on the same plane as the axis of the turntable. A drive motor is provided on one side of the turntable to drive it to reciprocate within the range of 140°-160°.

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