Musical instrument metal piece polishing device

Abstract

The invention relates to the technical field of musical instrument grinding and polishing, in particular to a musical instrument metal part polishing device. The polishing device comprises a mounting frame, a polishing and grinding belt, two supporting rollers, two adjusting arms, a driving roller and a self-adaptive tensioning roller, the two adjusting arms and the two supporting rollers are symmetrically arranged along the vertical center face of the mounting frame, the adjusting arms are rotationally connected with the mounting frame through rotating shafts, a center mounting plate is fixedly mounted on the mounting frame, and the rotating shafts are sleeved with torsional springs; the driving roller, the self-adaptive tensioning roller and the two supporting rollers are sequentially sleeved with the polishing and grinding belt, an elastic tensioning device is arranged between the self-adaptive tensioning roller and the mounting frame, a tension adjusting device is arranged on the self-adaptive tensioning roller, a mounting support is arranged beside the mounting frame, and an inserting rod connected with the rotating shaft in a clamped mode is arranged on the mounting support. The full-working-condition self-adaptive polishing device has the full-working-condition self-adaptive polishing function, the contact area and the grinding and polishing area can be enlarged, the tension can be controlled in a self-adaptive mode, and the quick locking function can meet the precise grinding operation requirements of different positions.

Description

Technical Field

[0001] The invention relates to the technical field of musical instrument grinding and polishing, and in particular to a musical instrument metal part polishing device. Background Art

[0002] In the field of polishing metal parts for musical instruments, traditional rigid-support polishing devices have the following problems: insufficient surface adaptability, making it difficult to automatically adapt to metal parts with complex contours such as arcs and saddles, resulting in insufficient contact area and uneven pressure, which easily leads to polishing blind spots and surface scratches; tension control lags, relies on manual adjustment, and cannot respond in real time to tension fluctuations caused by polishing belt wear or changes in metal part contours, resulting in unstable polishing accuracy and the risk of polishing belt breakage; low changeover efficiency, requiring frequent manual adjustment of support roller position and tension parameters for different types of metal parts, resulting in low equipment utilization; high maintenance costs, the rigid structure lacks vibration buffering, the polishing belt has a short life, and the traditional locking method is prone to loosening, requiring frequent maintenance. It is difficult to meet the flexible needs of small-batch, multi-model production. Summary of the Invention

[0003] Based on this, it is necessary to provide a musical instrument metal parts polishing device to address the existing technical problems.

[0004] In order to solve the problems of the prior art, the technical solution adopted by the present invention is: The present invention provides a polishing device for musical instrument metal parts, which is arranged on a polishing manipulator. The polishing device comprises: Mounting frame, the mounting frame is mounted on the polishing robot; An amorphous polishing assembly is installed on a mounting frame. The amorphous polishing assembly includes a polishing belt, a support roller, an adjusting arm, a driving roller, and an adaptive tensioning roller. Two adjusting arms and two supporting rollers are provided and are symmetrically arranged along the vertical center plane of the mounting frame. The adjusting arm is rotatably connected to the mounting frame through a rotating shaft. A central mounting plate is fixedly installed on the mounting frame. A torsion spring is sleeved on the rotating shaft. One end of the torsion spring is fixedly connected to the central mounting plate, and the other end of the torsion spring is fixedly connected to the rotating shaft. The rotating shaft is fixedly connected to the adjusting arm. A rotatable driving roller is installed at one end of the mounting frame. The adaptive tensioning roller is slidably arranged on the mounting frame. The polishing belt is sequentially sleeved on the driving roller, the adaptive tensioning roller, and the two supporting rollers. The elastic tensioning device is arranged between the adaptive tensioning roller and the mounting frame, and is used to automatically adjust the position of the adaptive tensioning roller through its own elastic deformation; The tension regulating device is arranged on the adaptive tensioning roller and cooperates with the elastic tensioning device to realize dynamic compensation of the tension of the polishing belt.

[0005] Preferably, the adaptive tensioning roller is provided with a tension adjusting device, a mounting bracket is provided next to the mounting frame, a sliding rod is provided on the mounting bracket, a polygonal locking groove is provided at one end of the rotating shaft close to the rod, and a polygonal locking pin is provided at the end of the rod 1 to match it, and the sliding direction of the rod is consistent with the axial direction of the rotating shaft.

[0006] Preferably, the elastic tensioning device includes a horizontal slider, a first adjusting plate, a second adjusting plate, a horizontal telescopic rod and a first spring. Horizontal sliders are provided at both ends of the adaptive tensioning roller. The horizontal sliders are connected to the adaptive tensioning roller shaft. A horizontal adjustment groove for the sliding of the horizontal slider is opened in the horizontal direction on the mounting frame. Both ends of the second adjusting plate are fixedly connected to the two horizontal sliders. The first adjusting plate is located on the side of the second adjusting plate away from the adaptive tensioning roller. One end of the horizontal telescopic rod is fixedly connected to the center mounting plate, and the other end of the horizontal telescopic rod is fixedly connected to the side wall of the first adjusting plate. The first spring is sleeved on the horizontal telescopic rod, and the two ends of the first spring are fixedly connected to the center mounting plate and the first adjusting plate respectively. The first adjusting plate is transmission-connected to the second adjusting plate. The tension adjusting device is installed on the first adjusting plate, and the tension adjusting device is transmission-connected to the second adjusting plate. Preferably, the tension adjustment device includes a first linear drive, a first push plate, a pressure sensor and a horizontal limit rod, the first linear drive is fixedly mounted on the first adjustment plate, the first push plate is located on the side of the second adjustment plate close to the first adjustment plate, the first push plate is connected to the second adjustment plate, the pressure sensor is arranged at the connection between the first push plate and the second adjustment plate, the horizontal limit rod is fixedly mounted on the second adjustment plate, and the horizontal limit rod is slidably fitted with the first adjustment plate.

[0007] Preferably, it also includes a limiting roller, which is installed at one end of the adjusting arm close to the supporting roller, and limiting rings are provided on both sides of the limiting roller. The polishing belt passes through the area between the limiting roller and the supporting roller, and a detachable mounting seat is provided at the top of the adjusting arm, and the supporting roller is installed on the detachable mounting seat.

[0008] Preferably, the mounting frame is composed of a fixing frame, a side plate and a bottom mounting plate, the side plate is located beside the fixing frame and is vertically arranged, and the bottom mounting plate is detachably installed between the fixing frame and the side plate.

[0009] Preferably, a pressing roller and a pressing support device are provided in the middle of the mounting frame, the pressing roller is arranged between two support rollers and can move in the vertical direction, the pressing support device is installed on the central mounting plate, and the pressing roller is arranged at the top of the pressing support device.

[0010] Preferably, the pressing support device includes a pressing support frame, a first lifting frame, a lifting slider, a second spring and a lifting limit rod. The pressing support frame is fixedly mounted on the central mounting plate, the first lifting frame is vertically slidably arranged above the pressing support frame, the pressing roller is rotatably mounted on the first lifting frame, the lifting slider is slidably arranged on the pressing support frame, the lifting slider is fixedly connected to the first lifting frame, the second spring is vertically arranged, and both ends of the second spring are respectively fixedly connected to the central mounting plate and the lifting slider, one end of the lifting limit rod is fixedly connected to the first lifting frame, and the other end of the lifting limit rod is slidably connected to the pressing support frame.

[0011] Preferably, a second linear drive and a second push plate are also installed on the mounting bracket, the second linear drive is fixedly mounted on the mounting bracket, the output end of the second linear drive is fixedly connected to the second push plate, the insertion rod is fixedly mounted on the second push plate, a horizontal slide groove is provided on the insertion rod along its length direction, a first friction ring is slidingly provided on the insertion rod, a limiting slider that slides in cooperation with the horizontal slide groove is fixedly mounted on the first friction ring, a third spring is provided between the first friction ring and the second push plate, and a second friction ring is fixedly mounted on the end of the rotating shaft near one end of the insertion rod.

[0012] Preferably, a contact pressure plate is fixedly mounted on the adjusting arm, and a contact transmission plate is fixedly mounted on the first lifting frame, and the contact pressure plate and the contact transmission plate are in contact and transmission.

[0013] Preferably, the amorphous polishing assembly further includes a rotary driver, which is fixedly mounted on the mounting frame, and an output end of the rotary driver is connected to the driving roller via a synchronous belt.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention has an adaptive polishing function under all working conditions. The adjusting arm and the torsion spring are linked to realize automatic adjustment of the support roller angle, thereby expanding the contact and polishing area, which is beneficial to improving the polishing yield of the curved surface; the elastic tensioning and tension adjustment device cooperate to control the tension to avoid scratches and belt breakage; the quick locking structure can adapt to the precise polishing operation requirements of different positions, and the pressing roller and the elastic support device ensure uniform contact of the polishing belt. The modular design supports quick replacement and maintenance, and the versatility and maintainability of the equipment are significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the three-dimensional structure of a musical instrument metal part polishing device Figure 1 ; Figure 2 A schematic diagram of the three-dimensional structure of a musical instrument metal part polishing device Figure 2 ; Figure 3 It is a top view of a polishing device for metal parts of musical instruments; Figure 4A schematic diagram of the partial three-dimensional structure of a polishing device for musical instrument metal parts Figure 1 ; Figure 5 It is a partial front view of a polishing device for metal parts of musical instruments; Figure 6 A schematic diagram of the partial three-dimensional structure of a polishing device for musical instrument metal parts Figure 2 ; Figure 7 It is a three-dimensional exploded view of a polishing device for metal parts of musical instruments; Figure 8 The present invention is a schematic diagram of the three-dimensional structure of a pressing roller and a pressing support device in a polishing device for a metal part of a musical instrument.

[0016] The numbers in the figure are: 1. Mounting frame; 2. Polishing belt; 3. Support roller; 4. Adjustment arm; 5. Drive roller; 6. Adaptive tensioning roller; 7. Rotating shaft; 8. Center mounting plate; 9. Torsion spring; 10. Elastic tensioning device; 11. Tension adjustment device; 12. Mounting bracket; 13. Insertion rod; 14. Polygonal locking groove; 15. Polygonal locking pin; 16. Horizontal slider; 17. First adjustment plate; 18. Second adjustment plate; 19. Horizontal telescopic rod; 20. First spring; 21. Horizontal adjustment groove; 22. First linear actuator; 23. First push plate; 24. Pressure sensor; 2 5. Horizontal limit rod; 26. Limit roller; 27. Limit ring; 28. Removable mounting seat; 29. ​​Fixed frame; 30. Side plate; 31. Bottom mounting plate; 32. Clamping roller; 33. Clamping support device; 34. Clamping support frame; 35. First lifting frame; 36. Lifting slider; 37. Second spring; 38. Lifting limit rod; 39. Second linear drive; 40. Second push plate; 41. Horizontal slide; 42. First friction ring; 43. Third spring; 44. Second friction ring; 45. Contact pressure plate; 46. Contact transmission plate; 47. Rotary drive. DETAILED DESCRIPTION

[0017] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] like Figures 1-8The polishing device for musical instrument metal parts shown is arranged on a polishing manipulator. The polishing device includes a mounting frame 1 mounted on the polishing manipulator and an amorphous polishing assembly mounted on the mounting frame 1. The length direction of the mounting frame 1 is recorded as a first direction, which is a horizontal direction. The amorphous polishing assembly includes a polishing belt 2, a supporting roller 3, an adjusting arm 4, a driving roller 5 and an adaptive tensioning roller 6. The supporting roller 3, the driving roller 5 and the adaptive tensioning roller 6 all extend along a second direction, which is a horizontal direction perpendicular to the first direction. The adjusting arm 4 and the supporting roller 3 are each provided with two and are symmetrically arranged along the vertical center plane of the mounting frame 1. The adjusting arm 4 is rotatably connected to the mounting frame 1 through a rotating shaft 7. The rotation axis direction of the rotating shaft 7 is the second direction. A central mounting plate 8 (combined with Figure 1 and Figure 6 ), a torsion spring 9 is sleeved on the rotating shaft 7, one end of the torsion spring 9 is fixedly connected to the central mounting plate 8, the other end of the torsion spring 9 is fixedly connected to the rotating shaft 7, the rotating shaft 7 is fixedly connected to the adjusting arm 4, the rotatable driving roller 5 is mounted on one end of the mounting frame 1, the adaptive tensioning roller 6 is slidably set on the mounting frame 1, and its sliding direction is the first direction, the polishing and grinding belt 2 is sequentially sleeved on the driving roller 5, the adaptive tensioning roller 6 and the two supporting rollers 3, an elastic tensioning device 10 is provided between the adaptive tensioning roller 6 and the mounting frame 1, and a tension adjusting device 11 is provided on the adaptive tensioning roller 6.

[0019] The drive roller 5 is driven by an external power unit, forming a closed loop transmission structure through the polishing belt 2, which is mounted on the drive roller 5, the adaptive tensioning roller 6, and the two support rollers 3. The rotation of the drive roller 5 drives the polishing belt 2 in a circular motion, so that the polishing surface of the polishing belt 2 (the polishing surface points outward) continuously acts on the surface of the metal component of the instrument, achieving a continuous polishing operation.

[0020] The present invention has an adaptive fitting adjustment process. When the mounting frame 1 moves to the processing position with the polishing robot, the two support rollers 3 contact the outer wall of the metal part of the musical instrument through the polishing belt 2. The squeezing force of the metal part on the support roller 3 pushes the adjustment arm 4 to deflect to both sides around the rotating shaft 7. At this time, the torsion spring 9 on the rotating shaft 7 undergoes elastic deformation and generates a restoring force. The deflection of the adjustment arm 4 causes the support roller 3 to drive the polishing belt 2 to expand, increasing the contact length and contact area between the polishing belt 2 and the outer wall of the metal part, forming an amorphous adaptive fitting state. The continuous clamping force of the torsion spring 9 ensures that the support roller 3 always fits tightly to the surface of the metal part through the polishing belt 2. Even if the size or contour of the metal part changes, it can automatically adapt through the swing of the adjustment arm 4 to maintain a stable contact pressure.

[0021] The adaptive tensioning roller 6 is slidably mounted on the mounting frame 1 via an elastic tensioning device 10. When the polishing belt 2 experiences tension fluctuations due to wear, stretching, or changes in contact pressure, the elastic deformation of the elastic tensioning device 10 automatically adjusts the position of the adaptive tensioning roller 6. Simultaneously, a tension adjustment device 11 allows for manual or automatic fine-tuning of the tension based on actual processing requirements. These two mechanisms work together to dynamically compensate for the tension of the polishing belt 2, preventing deviations in polishing accuracy or belt breakage caused by uneven tension.

[0022] Furthermore, a mounting bracket 12 is fixedly provided on the side of the mounting frame 1, and a sliding rod 13 is provided on the mounting bracket 12. A polygonal locking groove 14 is provided on the end of the rotating shaft 7 close to the rod 13, and a polygonal locking pin 15 is provided on the end of the rod 13 close to the rotating shaft 7 to match it. The sliding direction of the rod 13 is consistent with the axial direction of the rotating shaft 7.

[0023] When it is necessary to fix the specific working angle of the adjustment arm 4, for example, to provide contact pressure between the polishing belt 2 and the metal surface and to prevent the adjustment arm 4 from further displacement, the adjustment arm 4 is locked in its initial state to meet the needs of polishing smaller metal parts. The operator slides the insertion rod 13 on the mounting bracket 12 along the axis of the rotating shaft 7, so that the polygonal locking pin 15 at the top of the insertion rod 13 precisely fits into the polygonal locking groove 14 at the end of the rotating shaft 7. This polygonal matching structure geometrically restricts the rotational freedom of the rotating shaft 7, achieving instant locking of the position of the adjustment arm 4, ensuring the stable position of the support roller 3 during the polishing process, and meeting the rigid support requirements of different processing scenarios.

[0024] The equipment significantly improves its adaptability to different metal parts, reducing changeover and commissioning time. The contact area of ​​the polishing belt 2 automatically expands as the metal part is squeezed, increasing the single-pass polishing coverage at the same polishing pressure. Combined with dynamic tension control, this eliminates the edge polishing blind spots common with traditional rigid support structures.

[0025] The combination of the elastic tensioning device 10 and the tension adjustment device 11 enables adaptive adjustment of the tension of the polishing belt 2 under all operating conditions, significantly reducing the rate of surface scratch defects caused by tension fluctuations. The quick-locking structure of the polygonal locking groove 14 and the polygonal locking pin 15 significantly shortens the time it takes to secure the adjustment arm 4 in position. Once locked, the structural rigidity is significantly enhanced, effectively suppressing polishing vibration and ensuring high-precision processing.

[0026] The elastic tensioning device 10 includes a horizontal slider 16, a first adjustment plate 17, a second adjustment plate 18, a horizontal telescopic rod 19 and a first spring 20. Both ends of the adaptive tensioning roller 6 are provided with a horizontal slider 16, and the horizontal slider 16 is axially connected to the adaptive tensioning roller 6, that is, the horizontal slider 16 is rotatably connected to the adaptive tensioning roller 6. A horizontal adjustment slot 21 for sliding the horizontal slider 16 is opened on the mounting frame 1 in the horizontal direction. Both ends of the second adjustment plate 18 are fixedly connected to the two horizontal sliders 16. The second adjustment plate 18 is located on one side of the adaptive tensioning roller 6. The first adjustment plate 18 is located on the side of the adaptive tensioning roller 6. The section plate 17 is located on the side of the second adjustment plate 18 away from the adaptive tensioning roller 6, one end of the horizontal telescopic rod 19 is fixedly connected to the central mounting plate 8, and the other end of the horizontal telescopic rod 19 is fixedly connected to the side wall of the first adjustment plate 17. The first spring 20 is sleeved on the horizontal telescopic rod 19, and the two ends of the first spring 20 are respectively fixedly connected to the central mounting plate 8 and the first adjustment plate 17. The first adjustment plate 17 is transmission-connected to the second adjustment plate 18, and the tension adjustment device 11 is installed on the first adjustment plate 17, and the tension adjustment device 11 is transmission-connected to the second adjustment plate 18.

[0027] When the support roller 3 mounted on the adjustment arm 4 contacts the outer wall of the metal part and deflects, the wrap angle and tension path of the polishing belt 2 on the support roller 3 change, causing real-time tension changes. At this point, the horizontal sliders 16 at each end of the adaptive tensioning roller 6 slide within the horizontal adjustment slots 21 of the mounting frame 1, displacing the second adjustment plate 18. This in turn drives the first adjustment plate 17 along the horizontal telescopic rod 19, causing the first spring 20 mounted on the horizontal telescopic rod 19 to elastically deform. The elastic force of the first spring 20 is transmitted to the adaptive tensioning roller 6 via the second adjustment plate 18, creating a compensating force opposite to the tension change. If the deflection of the support roller 3 causes the tension of the polishing belt 2 to increase, the first spring 20 compresses to absorb the excess tension. If the tension decreases, the first spring 20 resets the adaptive tensioning roller 6, tightening the polishing belt 2, thus achieving real-time compensation for tension fluctuations. The tension adjustment device 11 is mounted on the first adjustment plate 17 and is in transmission connection with the second adjustment plate 18. It actively adjusts the initial preload of the first spring 20 based on the deflection angle of the support roller 3 (corresponding to different metal part profiles). When the polishing belt 2 needs to be replaced, the tension adjustment device 11 drives the second adjustment plate 18 toward the first spring 20, reducing the support for the polishing belt 2. This allows the polishing belt 2 to relax, making replacement easier. The provision of the tension adjustment device 11 not only facilitates the installation of the polishing belt 2 but also allows for compensation for subsequent tension fluctuations. The elastic tensioning device 10 works in conjunction with the tension adjustment device 11, passively compensating for dynamic tension changes while meeting the static tension requirements of different processing scenarios.

[0028] The mechanical linkage between the support roller 3's deflection and the elastic tensioning device 10 enables the system to automatically trigger tension compensation when the support roller 3 experiences even a slight deflection. This ensures that tension fluctuations in the polishing belt 2 respond synchronously to changes in contact pressure, avoiding the adjustment lag associated with traditional independent tensioning mechanisms and significantly improving polishing contact pressure stability. When the metal part's outer wall contour causes significant deflection of the support roller 3, the tension adjustment device 11, in conjunction with the elastic tensioning device 10, keeps tension fluctuations extremely low, ensuring uniform contact pressure during machining of complex curved surfaces and significantly improving the surface polishing yield. Tension changes caused by support roller 3 deflection are automatically compensated by the device, eliminating the need for manual tension adjustment based on the part's contour. This significantly reduces changeover time and improves equipment utilization, especially in mixed-line machining scenarios with multiple models. The elastic tensioning device 10 cushions the instantaneous tension shock caused by support roller 3 deflection, reducing the probability of breakage of the polishing belt 2 due to sudden tensioning. Combined with the optimized preload of the tension adjustment device 11, this effectively extends the service life of the polishing belt 2 and reduces consumable costs.

[0029] The tension adjustment device 11 includes a first linear drive 22, a first push plate 23, a pressure sensor 24 and a horizontal limit rod 25. The first linear drive 22 is fixedly mounted on the first adjustment plate 17. The first push plate 23 is located on the side of the second adjustment plate 18 close to the first adjustment plate 17. The first push plate 23 is connected to the second adjustment plate 18. The pressure sensor 24 is arranged at the connection between the first push plate 23 and the second adjustment plate 18. The horizontal limit rod 25 is fixedly mounted on the second adjustment plate 18. The horizontal limit rod 25 slides with the first adjustment plate 17.

[0030] The first adjustment plate 17 and the second adjustment plate 18 are connected by transmission through the tension adjustment device 11. The tension adjustment device 11 realizes precise tension control and efficient processing through the coordinated action of the first linear drive 22, the first push plate 23, the pressure sensor 24 and the horizontal limit rod 25: the first linear drive 22 is, for example, an electric push rod, which is fixed to the first adjustment plate 17. By driving the first push plate 23, the second adjustment plate 18 and the adaptive tensioning roller 6 are driven to move horizontally, thereby realizing active stepless adjustment of the tension of the polishing belt 2. The tension force is increased when the drive is extended and reduced when the drive is contracted. The pressure sensor 24 monitors the contact pressure at the connection between the first push plate 23 and the second adjustment plate 18 in real time and feeds back to the control system to form a tension closed-loop control to ensure that the actual tension is consistent with the preset value; the horizontal limit rod 25 is movable through the first adjustment plate 17. The horizontal limit rod 25 provides a rigid guide for the movement of the second adjustment plate 18 to avoid tilting or jamming, and ensure that the adjustment process is smooth and accurate. It can suppress vibration or slippage of the polishing belt, greatly reducing the maintenance frequency; after the 24-way pressure sensor signal is connected to the CNC system, the tension curve of different metal parts models can be preset to achieve "one-click model change", combining the advantages of high-precision control, dynamic load adaptation, high reliability and intelligent processing adaptation, meeting the stringent requirements of polishing high-end musical instrument metal parts.

[0031] The polishing device also includes a limiting roller 26, which is installed at one end of the adjustment arm 4 close to the support roller 3, and a limiting ring 27 (such as Figure 7 As shown), the polishing belt 2 passes through the area between the limiting roller 26 and the supporting roller 3. The top end of the adjusting arm 4 is provided with a detachable mounting seat 28, and the supporting roller 3 is mounted on the detachable mounting seat 28.

[0032] The limiting roller 26 and the limiting ring 27 are used to guide and limit the polishing belt 2. The polishing belt 2 passes through the area between the limiting roller 26 and the supporting roller 3. This installation method can not only ensure the good contact state between the polishing belt 2 and the supporting roller 3, but also ensure that it will not be offset. The detachable mounting seat 28 is used to disassemble and assemble the supporting roller 3, which is convenient for replacing the polishing belt 2.

[0033] The mounting frame 1 is composed of a fixing frame 29 , a side plate 30 and a bottom mounting plate 31 . The side plate 30 is located beside the fixing frame 29 and is vertically arranged. The bottom mounting plate 31 is detachably installed between the fixing frame 29 and the side plate 30 .

[0034] When replacing the polishing belt 2, the bottom mounting plate 31 is removed to thereby put the replaced polishing belt 2 on the support roller 3, the drive roller 5 and the adaptive tensioning roller 6. After the replacement is completed, the bottom mounting plate 31 is installed.

[0035] A pressing roller 32 and a pressing support device 33 are provided in the middle of the mounting frame 1. The pressing roller 32 can be vertically slidably arranged between the two support rollers 3. The pressing support device 33 is installed on the central mounting plate 8, and the pressing roller 32 is arranged at the top of the pressing support device 33.

[0036] The pressing roller 32 is used to press the polishing belt 2 between the two support rollers 3 against the outer wall of the metal part to prevent the polishing belt 2 in this area from loosening or deviating. The pressing support device 33 is used to elastically lift the pressing roller 32 upward to provide elastic resistance force.

[0037] The pressing support device 33 includes a pressing support frame 34, a first lifting frame 35, a lifting slider 36, a second spring 37 and a lifting limit rod 38. The pressing support frame 34 is fixedly mounted on the central mounting plate 8, the first lifting frame 35 is vertically slidably arranged above the pressing support frame 34, the pressing roller 32 is rotatably mounted on the first lifting frame 35, the lifting slider 36 is slidably arranged on the pressing support frame 34, the lifting slider 36 is fixedly connected to the first lifting frame 35, the second spring 37 is vertically arranged, and the two ends of the second spring 37 are respectively fixedly connected to the central mounting plate 8 and the lifting slider 36, one end of the lifting limit rod 38 is fixedly connected to the first lifting frame 35, and the other end of the lifting limit rod 38 is slidably connected to the pressing support frame 34.

[0038] The pressing roller 32 corresponds to two pressing support devices 33, and the two pressing support devices 33 are respectively arranged below the two ends of the pressing roller 32. The two first lifting frames 35 are respectively rotatably connected to the two ends of the pressing roller 32, and the two pressing support devices 33 are used to realize the upward or downward movement of the pressing roller 32 in the vertical direction.

[0039] When the pressing support device 33 is working, the elastic force provided by the second spring 37 pushes the lifting slider 36 upward, thereby driving the first lifting frame 35 fixedly connected to it to move upward. The pressing roller 32 installed on the first lifting frame 35 presses the polishing belt 2 against the outer surface of the metal part. The lifting limit rod 38 guides and limits the displacement of the first lifting frame 35. The pressing support frame 34 is used to install the pressing support device 33 on the central mounting plate 8.

[0040] A second linear drive 39 and a second push plate 40 are also installed on the mounting bracket 12. The second linear drive 39 is fixedly mounted on the mounting bracket 12. The output end of the second linear drive 39 is fixedly connected to the second push plate 40. The insertion rod 13 is fixedly mounted on the second push plate 40. A horizontal slide groove 41 is provided on the insertion rod 13 along its length direction. A first friction ring 42 is slidingly provided on the insertion rod 13. A limiting slider that slides with the horizontal slide groove 41 is fixedly mounted on the first friction ring 42. A third spring 43 is provided between the first friction ring 42 and the second push plate 40. A second friction ring 44 is fixedly mounted on the end of the rotating shaft 7 near one end of the insertion rod 13.

[0041] The second linear drive 39 is, for example, an electric push rod. The output end of the second linear drive 39 drives the second push plate 40 to move, and then drives the insertion rod 13 installed on the second push plate 40 to move synchronously. During the process, the third spring 43 provides elastic force to push the first friction ring 42 to move outward on the insertion rod 13, and the first friction ring 42 conflicts with the second friction ring 44 on the rotating shaft 7. During the continuous advancement process, the conflicting friction between the two is gradually increased until the rotating shaft 7 and the adjustment arm 4 installed thereon can be locked. Compared with the method of directly inserting into the interior of the rotating shaft 7, this method has a more flexible angle and can achieve stepless adjustment. It continues to apply thrust. When the third spring 43 is compressed into place, the polygonal locking pin 15 on the insertion rod 13 can be inserted into the polygonal locking groove 14 to achieve secondary locking, further ensuring the locking effect and preventing the adjustment arm 4 from offsetting during grinding.

[0042] A resisting pressure plate 45 is fixedly mounted on the regulating arm 4 , and a resisting transmission plate 46 is fixedly mounted on the first lifting frame 35 . The resisting pressure plate 45 and the resisting transmission plate 46 are in contact and transmission with each other.

[0043] When the two adjustment arms 4 are in their initial position at the center, the contact pressure plate 45 presses against the contact transmission plate 46 and pushes it downward, causing the first lifting frame 35 to move downward a certain distance. This causes the contact roller 32 mounted on the first lifting frame 35 to disengage from the polishing belt 2. In this state, the distance between the two support rollers 3 is sufficiently small that the contact roller 32 is no longer required, and the lowering of the contact roller 32 avoids interference. When the adjustment arms 4 deflect outward, the contact pressure plate 45 simultaneously deflects, releasing the downward pressure on the contact transmission plate 46. This allows the first lifting frame 35 to move upward under the elastic force of the second spring 37, thus achieving the contact function.

[0044] The amorphous polishing assembly further includes a rotary driver 47 (i.e., the external power device described above), which is fixedly mounted on the mounting frame 1. The output end of the rotary driver 47 is connected to the drive roller 5 via a synchronous belt. The rotary driver 47 is, for example, a rotary motor.

[0045] The above embodiments merely represent one or several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A polishing device for musical instrument metal parts, provided on a polishing manipulator, characterized in that: The polishing device includes: A mounting frame, wherein the mounting frame is mounted on the polishing robot; An amorphous polishing assembly is installed on a mounting frame, and the amorphous polishing assembly includes a polishing belt, a supporting roller, an adjusting arm, a driving roller and an adaptive tensioning roller, and the adjusting arm and the supporting roller are each provided with two and are symmetrically arranged along the vertical center plane of the mounting frame, the adjusting arm is rotatably connected to the mounting frame through a rotating shaft, a center mounting plate is fixedly installed on the mounting frame, a torsion spring is sleeved on the rotating shaft, one end of the torsion spring is fixedly connected to the center mounting plate, and the other end of the torsion spring is fixedly connected to the rotating shaft, and the rotating shaft is fixedly connected to the adjusting arm, the rotatable driving roller is installed at one end of the mounting frame, and the adaptive tensioning roller is slidably arranged on the mounting frame, and the polishing belt is sequentially sleeved on the driving roller, the adaptive tensioning roller and the two supporting rollers; an elastic tensioning device, the elastic tensioning device being arranged between the adaptive tensioning roller and the mounting frame, the elastic tensioning device being used to automatically adjust the position of the adaptive tensioning roller through its own elastic deformation; A tension regulating device is provided on the adaptive tensioning roller and cooperates with the elastic tensioning device to achieve dynamic compensation of the tension of the polishing and grinding belt.

2. A musical instrument metal parts polishing device according to claim 1, characterized in that: A mounting bracket is provided on the side of the mounting frame, and a sliding rod is provided on the mounting bracket. A polygonal locking groove is provided at one end of the rotating shaft close to the rod, and a polygonal locking pin is provided at the end of the rod to match it. The sliding direction of the rod is consistent with the axial direction of the rotating shaft.

3. The musical instrument metal part polishing device according to claim 1, characterized in that: The elastic tensioning device includes a horizontal slider, a first adjusting plate, a second adjusting plate, a horizontal telescopic rod and a first spring, and horizontal sliders are provided at both ends of the adaptive tensioning roller, and the horizontal slider is connected to the adaptive tensioning roller shaft, and a horizontal adjustment slot for the horizontal slider to slide is opened on the mounting frame along the horizontal direction, and the two ends of the second adjusting plate are fixedly connected to the two horizontal sliders, the first adjusting plate is located on the side of the second adjusting plate away from the adaptive tensioning roller, one end of the horizontal telescopic rod is fixedly connected to the center mounting plate, and the other end of the horizontal telescopic rod is fixedly connected to the side wall of the first adjusting plate, the first spring is sleeved on the horizontal telescopic rod, and the two ends of the first spring are fixedly connected to the center mounting plate and the first adjusting plate respectively, the first adjusting plate is transmission-connected to the second adjusting plate, the tension adjusting device is mounted on the first adjusting plate, and the tension adjusting device is transmission-connected to the second adjusting plate.

4. A musical instrument metal parts polishing device according to claim 3, characterized in that: The tension adjustment device includes a first linear drive, a first push plate, a pressure sensor and a horizontal limit rod. The first linear drive is fixedly mounted on the first adjustment plate. The first push plate is located on the side of the second adjustment plate close to the first adjustment plate. The first push plate is connected to the second adjustment plate. The pressure sensor is arranged at the connection between the first push plate and the second adjustment plate. The horizontal limit rod is fixedly mounted on the second adjustment plate. The horizontal limit rod is slidably fitted with the first adjustment plate.

5. The musical instrument metal part polishing device according to claim 1, characterized in that: It also includes a limiting roller, which is installed at one end of the adjusting arm close to the supporting roller, and limiting rings are provided on both sides of the limiting roller. The polishing belt passes through the area between the limiting roller and the supporting roller, and a detachable mounting seat is provided at the top of the adjusting arm, and the supporting roller is installed on the detachable mounting seat.

6. The musical instrument metal part polishing device according to claim 2, characterized in that: A pressing roller and a pressing support device are provided in the middle of the mounting frame. The pressing roller is arranged between two support rollers and can move in the vertical direction. The pressing support device is installed on the central mounting plate. The pressing roller is arranged at the top end of the pressing support device.

7. A musical instrument metal part polishing device according to claim 6, characterized in that: The pressing support device includes a pressing support frame, a first lifting frame, a lifting slider, a second spring and a lifting limit rod, the pressing support frame is fixedly mounted on the central mounting plate, the first lifting frame is vertically slidably arranged above the pressing support frame, the pressing roller is rotatably mounted on the first lifting frame, the lifting slider is slidably arranged on the pressing support frame, the lifting slider is fixedly connected to the first lifting frame, the second spring is vertically arranged, and the two ends of the second spring are respectively fixedly connected to the central mounting plate and the lifting slider, one end of the lifting limit rod is fixedly connected to the first lifting frame, and the other end of the lifting limit rod is slidably connected to the pressing support frame.

8. The musical instrument metal part polishing device according to claim 7, characterized in that: The mounting bracket is also provided with a second linear drive and a second push plate, the second linear drive is fixedly mounted on the mounting bracket, the output end of the second linear drive is fixedly connected to the second push plate, the insertion rod is fixedly mounted on the second push plate, a horizontal slide groove is provided on the insertion rod along its length direction, a first friction ring is slidably provided on the insertion rod, a limiting slider which slides with the horizontal slide groove is fixedly mounted on the first friction ring, a third spring is provided between the first friction ring and the second push plate, and a second friction ring is fixedly mounted on the end of the rotating shaft near one end of the insertion rod.

9. The musical instrument metal part polishing device according to claim 8, characterized in that: A contact pressure plate is fixedly mounted on the adjusting arm, a contact transmission plate is fixedly mounted on the first lifting frame, and the contact pressure plate contacts and transmits power to the contact transmission plate.

10. The musical instrument metal part polishing device according to claim 1, characterized in that: The amorphous polishing assembly further includes a rotary driver, which is fixedly mounted on the mounting frame, and an output end of the rotary driver is connected to the driving roller via a synchronous belt.

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