Assembling equipment for adjusting gear of triangular musical instrument

Abstract

According to the assembly equipment for the adjusting gear of the triangular musical instrument, after a twist nail is planted in a wood strip, twist buckles are rotated one by one and vertically assembled on the twist nail through the equipment, and automatic twist buckle installation of the adjusting gear is achieved. The equipment comprises a directional feeding mechanism, a circumferential positioning mechanism and an assembling mechanism, the directional feeding mechanism is used for outputting buttons one by one in the state that assembling holes of the buttons face downwards, the circumferential positioning mechanism is used for straightening the circumferential angles of tuning holes of the buttons, and the assembling mechanism is used for pre-pressing the buttons on twist nails and then screwing the buttons into the twist nails; material directional feeding, pre-pressing and material clamping and rotating assembly of automatic button feeding of the adjusting gear are achieved, so that it is guaranteed that all button heights in the adjusting gear are uniform, and the circumferential angles of tone tuning holes are uniform.

Description

Technical Field

[0001] The invention relates to the technical field of piano manufacturing and processing, in particular to an assembly device for adjusting gears of a grand piano. Background Art

[0002] like Figure 1 As shown, the piano adjustment device is a component of the piano, which includes a wooden strip 5, a twist nail 6 and a twist buckle 4. First, one end of a plurality of twist nails is planted on the wooden strip at intervals along the length direction of the wooden strip, and the other end of the twist nail has a thread, and then the twist nail is assembled on the other end of the twist nail; specifically, an assembly hole 41 is provided on the axis of the twist nail to match the twist nail, and one end face through which the assembly hole passes is defined as the positive face, and the other end face is defined as the negative face; two radially arranged tuning holes 42 are provided on the side close to the direction face, and the axes of the two tuning holes intersect and are perpendicular, and the tuning holes are used for the later tuning operation of the piano. In order to better assemble the piano and ensure the product quality of the piano, in terms of the adjustment gear, the height of all the twist buckles needs to be kept consistent, and the circumferential angles of the tuning holes of all the twist buckles need to be kept consistent.

[0003] In the existing processing technology, the process of assembling the twist nail on the twist nail can basically be mechanized, but it can only ensure the uniformity of the height of the twist buckle, and it is difficult to keep the circumferential angle of the tuning hole of the twist buckle consistent.

[0004] In addition, for cylindrical products such as twist nails, during the feeding process, only the twist nails can be output one by one. However, it is difficult to unify the end face on the front side of the twist nail output direction into a positive face. Generally, manual adjustment or the use of visual inspection equipment in conjunction with a fixture that drives the twist buckle to turn can be achieved, which undoubtedly increases the labor cost of production or the equipment manufacturing cost. Summary of the invention

[0005] In order to overcome the deficiencies of the above-mentioned prior art, the object of the present invention is to provide an assembly device for a grand piano adjustment gear, which can realize the directional feeding, pre-pressing, and material clamping and rotating assembly of the automatic buckles on the adjustment gear, so as to ensure that the height of all the buckles in the adjustment gear is uniform and the circumferential angle of the tuning holes is uniform.

[0006] The technical solution of the present invention is as follows: An assembly device for adjusting the gears of a grand piano, comprising a directional feeding mechanism, a circumferential positioning mechanism and an assembly mechanism; The directional feeding mechanism includes a vibrating plate, a material hooking rod, a material distribution guide, and a conveying track; the material hooking rod is used to identify the buttons with different front ends and guide them into two motion states, the material distribution guide is arranged below the output end of the vibrating plate, the material distribution guide has a fork, the conveying track is arranged below the material distribution guide, the conveying track has a first channel and a second channel connected to the fork, the first channel extends to the circumferential positioning mechanism, and the second channel extends back to the vibrating plate; The circumferential positioning mechanism includes a material moving assembly and a material transfer assembly; the material moving assembly is used to receive the buckle and transfer the buckle to the material transfer assembly, and the material transfer assembly is used to adjust the circumferential angle of the buckle; The assembly mechanism includes a feeding tool, a pre-pressing component, and a spinning component; the feeding tool has a first station and a second station, the first station is located below the pre-pressing component, and the second station is located below the spinning component; the spinning component is used to take out the buckle from the circumferential positioning mechanism, place it on the twist nail on the wooden strip in turn and pre-press it; the spinning component is used to drive the buckle to rotate and press down to screw the buckle onto the twist nail.

[0007] Furthermore, one end of the hooking rod is rotatably arranged above the output end of the vibration plate, and the other end of the hooking rod has a cone head, which is adapted to the assembly hole of the buckle.

[0008] Furthermore, the material dividing guide includes a first guide plate and a second guide plate, one end of the first guide plate is connected to the second guide plate, the other end of the first guide plate is inclined downward along the rear direction of the conveying direction, and the other end of the second guide plate is inclined downward along the front direction of the conveying direction to form the fork.

[0009] Furthermore, the conveying track includes a first track plate, a second track plate and a side baffle; the second track plate is spaced above the first track plate, the side baffle is located between the first track plate and the second track plate, and connects the side surfaces of the first track plate and the second track plate, forming the first channel above the first track plate, and forming the second channel above the second track plate; the output end of the first track plate extends relative to the second track plate, so that the first guide plate avoids the second track plate and extends above the first track plate, and the second guide plate extends to the second track plate.

[0010] Furthermore, a side where the first rail plate and the second rail plate are connected to the side baffle plate is tilted downward.

[0011] Furthermore, the conveying track also includes a guide tube, one end of which is connected to the first track plate, and the other end is connected to the circumferential positioning mechanism, and the conveying route of the guide tube is bent downward from horizontal to vertical.

[0012] Furthermore, the material transfer assembly includes a rotating seat and an optical detection module; the rotating seat is used to drive the button to rotate around its axis, and the optical detection module is arranged on one side of the rotating seat to detect the circumferential angle of the button on the rotating seat.

[0013] Furthermore, the optical detection module is a light ray sensing module, which includes a transmitter and a receiver, and the transmitter and the receiver are arranged on two sides of the rotating base relative to each other.

[0014] Furthermore, the spinning assembly includes a push-down cylinder, a motor and a third clamping member; the motor is arranged at the output end of the push-down cylinder, and the third clamping member is arranged at the output end of the motor.

[0015] Furthermore, the third clamping includes a pair of clamping blocks, a support column and a pair of transmission columns; the two clamping blocks are arranged relative to each other and slidingly, the support column is fixedly arranged on the axis of the clamping area of ​​the two clamping blocks, and the two transmission columns are arranged relative to each other on the two clamping blocks, and the transmission columns are adapted to the tuning holes of the buckle.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The directional feeding mechanism can output the buttons one by one, and the front end faces of the output buttons are unified, and then combined with the circumferential positioning mechanism, the circumferential angle of the buttons can be adjusted to achieve directional feeding of cylindrical workpieces; 2. The assembly mechanism first pre-presses the buttons on the twist nail to pre-tighten the buttons and the twist nail, and then screws the buttons onto the twist nail to ensure that the heights of all buttons in the adjustment gear are unified and the circumferential angles of the tuning holes are unified. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the adjustment gear and the buckle in the background technology of the present invention; Figure 2 is a top view of the assembly device of the present invention; Figure 3 is a front view of the assembly device of the present invention; Figure 4 It is a partial schematic diagram of the output end of the vibration plate in the present invention; Figure 5 is a schematic diagram of a process in which a button in a first state enters a first channel in the present invention; Figure 6 is a schematic diagram of the process of the button in the second state entering the second channel in the present invention; Figure 7 It is a partial schematic diagram of the circumferential positioning mechanism in the present invention; Figure 8 It is a partial schematic diagram of the assembly mechanism in the present invention; Fig. 9 is a partial schematic diagram of the third clamping member in the present invention; Description of Figure Numbers: 1-directional feeding mechanism; 11-vibrating plate; 12-hook rod; 13-material distribution guide; 131-first guide plate; 132-second guide plate; 14-conveying track; 141-first track plate; 142-second track plate; 143-side baffle; 144-guide tube; 15-guide frame; 2-circumferential positioning mechanism; 21-material moving assembly; 211-material receiving seat; 212-first clamping member; 22-material transfer assembly; 221-rotating seat; 222-optical detection module; 3-assembly mechanism; 31-feeding tool; 311-bottom plate; 312-limiting plate; 313-reference plate; 314-side pressure cylinder; 32-pre-pressing assembly; 321-second clamping member; 33-spinning assembly; 331-push-down cylinder; 332-motor; 333-third clamping member; 3331-clamping block; 3332-support column; 3333-transmission column; 4-twist buckle; 41-assembly hole; 42-tuning hole; 5-wooden strip; 6-twist nail. DETAILED DESCRIPTION

[0019] In order to better understand the purpose, structure, features and effects of the present invention, the present invention is further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that the features shown in the drawings are not necessarily drawn to scale. In addition, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", "front", "back" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. In addition, in the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0021] like Figure 2-3 As shown, this embodiment provides an assembly device for the adjustment gear of a grand piano. After the wooden strip 5 is planted with the twist nail 6, the twist buckles 4 are rotated and vertically assembled onto the twist nail 6 one by one through the device, so as to realize the automatic installation of the twist buckles 4 on the adjustment gear. The device comprises a directional feeding mechanism 1, a circumferential positioning mechanism 2 and an assembly mechanism 3. The directional feeding mechanism 1 is used to output the twist buckles 4 one by one with their assembly holes 41 facing downward, the circumferential positioning mechanism 2 is used to adjust the circumferential angle of the tuning hole 42 of the twist buckle 4, and the assembly mechanism 3 is used to pre-press the twist buckle 4 on the twist nail 6 before screwing the twist buckle 4 in; the material directional feeding, pre-pressing and rotational assembly of the automatic installation of the twist buckle 4 on the adjustment gear are realized to ensure that all the twist buckles 4 in the adjustment gear after assembly have uniform height and uniform circumferential angle of the tuning hole 42.

[0022] like Figure 4 As shown, as a preferred solution, the directional feeding mechanism 1 includes a vibration plate 11, a hooking rod 12, a material distribution guide 13, and a conveying track 14; the vibration plate 11 is used to output the buttons 4 one by one in a horizontal state; Since the vibration disk 11 can only output the buckles 4 one by one, and cannot uniformly control whether the front end face of the buckle 4 is the positive face or the negative face when the buckle 4 is output, the hook rod 12 is used to identify the buckles 4 with different front end faces and guide them into two motion states; one end of the hook rod 12 is rotatably arranged above the output end of the vibration disk 11, and the other end of the hook rod 12 has a cone head, which is adapted to the assembly hole 41 of the buckle 4, and the cone head is aligned with the assembly hole 41 of the buckle 4 under normal conditions; Specifically, Figure 5As shown, when the positive surface of the buckle 4 is at the front side, the assembly hole 41 of the buckle 4 will be sleeved on the outside of the cone head. Under the action of the horizontal thrust and upward supporting force of the vibrating plate 11, the buckle 4 pushes the hook rod 12 to rotate upward. In the process, the cone head and the buckle 4 will be stuck to each other, so that the front end of the buckle 4 is hooked up, and it keeps moving forward with the trend of changing from the horizontal state to the vertical state, forming the first state; Figure 5 As shown, when the reverse side of the buckle 4 is on the front side, the cone head abuts against the end face of the buckle 4 to form an inclined wedge structure, and the cone head rotates upward along the end face of the buckle 4, while the buckle 4 maintains a horizontal state and moves forward to form a second state; in this way, based on the different front end faces of the buckle 4, the hook rod 12 divides the buckle 4 on the output end of the vibration disk 11 into two movement states with two trends.

[0023] like Figure 4 As shown, the material distribution guide 13 is arranged below the output end of the vibration plate 11, and the material distribution guide 13 has a bifurcation. When the button 4 falls from the output end of the vibration plate 11 onto the material distribution guide 13, it is separated and guided out from the bifurcation based on the different movement states of the button 4; the material distribution guide 13 is in an inverted V shape, and includes a first guide plate 131 and a second guide plate 132. One end of the first guide plate 131 and the second guide plate 132 are connected, and the other end of the first guide plate 131 is tilted downward along the rear direction of the conveying direction, and the other end of the second guide plate 132 is tilted downward along the front direction of the conveying direction to form the bifurcation. Specifically, Figure 5 As shown, when the button 4 in the first state leaves the output end of the vibration plate 11, the tail end of the button 4 falls downward first. Since the button 4 loses the horizontal thrust and upward support force of the vibration plate 11, the cone head and the button 4 are no longer stuck to each other, and the hook rod 12 pushes the button 4 to fall onto the first guide plate 131 during the resetting process, so that the button 4 slides along the first guide plate 131; Figure 6 As shown, when the button 4 in the second state leaves the output end of the vibration plate 11, the front end of the button 4 first falls downward, and with the movement trend of forward translation, falls onto the second guide plate 132, and slides along the second guide plate 132; in this way, the button 4 in the two movement states is separately guided out.

[0024] like Figure 4As shown, the conveying track 14 is arranged below the material distribution guide 13, and the conveying track 14 has a first channel and a second channel connected to the bifurcation, which are used to output the buttons 4 in two states separately, the first channel extends to the circumferential positioning mechanism 2, and the second channel extends back to the vibration plate 11; the conveying track 14 is connected to the power source of the vibration plate 11, so that the conveying track 14 can drive the button 4 to move forward; the conveying track 14 includes a first track plate 141, a second track plate 142 and a side baffle 143; the second track plate 142 is arranged above the first track plate 141 at intervals, and the side baffle 143 is located between the first track plate 141 and the second track plate 142, and is connected to the first track plate 1 41 and the side of the second track plate 142; the first track plate 141 and the second track plate 142 are connected to the side baffle plate 143 at a side that is inclined downward, the first track plate 141 is located above the vertical area of ​​the hopper of the vibration plate 11, the first channel is formed above the first track plate 141, and the second channel is formed above the second track plate 142; the output end of the first track plate 141 extends relative to the second track plate 142, so that the first guide plate 131 avoids the second track plate 142 and extends to the top of the first track plate 141, the distance between the bottom end of the first guide plate 131 and the first track plate 141 is greater than the diameter of the button 4, and the second guide plate 132 extends to the second track plate 142; Specifically, the button 4 in the first state slides along the first guide plate 131 to the first track plate 141, and the button 4 abuts against the side plate, so that the button 4 in the first state is driven by the power source of the vibration disk 11 and transported to the circumferential positioning mechanism 2 on the first channel to wait for subsequent processing; the button 4 in the second state slides along the second guide plate 132 to the second track plate 142, and under the vibration of the power source of the vibration disk 11, falls from both sides of the second track plate 142 to the hopper of the vibration disk 11 to wait for re-output.

[0025] like Figure 7 As shown, further, the conveying track 14 also includes a guide tube 144, one end of the guide tube 144 is connected to the first track plate 141, and the other end is connected to the circumferential positioning mechanism 2. The conveying route of the guide tube 144 is bent downward from horizontal to vertical, so that the buckle 4 is transferred from a horizontal state to an upright state during the process of being conveyed to the circumferential positioning mechanism 2.

[0026] like Figure 4As shown, preferably, the first guide plate 131 includes a receiving portion and a guiding portion, the receiving portion is used to receive the twist buckle 4, and the guiding portion is used to limit the axial position of the twist buckle 4, so as to prevent displacement during transportation; specifically, the receiving portion is a structure with a wide contact area to facilitate the entry of the twist buckle 4, and the guiding portion is a structure with a narrow contact area to facilitate limiting the outer side of the twist buckle 4, so that the twist buckle 4 can accurately slide onto the first track plate 141; as in this embodiment, the receiving portion is a flat plate, and the guiding portion is a pipe.

[0027] like Figure 4 As shown, preferably, it also includes a guide frame 15, which is arranged above the output end of the vibration plate 11 and below the pivot end of the hook rod 12. The guide frame 15 has a limit groove, which extends along the conveying direction. The hook rod 12 moves in the limit groove to limit the two sides of the hook rod 12 to prevent the hook rod 12 from swinging on both sides of the conveying direction when resetting, which is beneficial for the cone head to align with the assembly hole 41 of the buckle 4.

[0028] like Figure 7 As shown, as a preferred solution, the circumferential positioning mechanism 2 includes a material moving component 21 and a material transfer component 22; the material moving component 21 is connected to the guide tube 144 to receive the buckle 4 and transfer the buckle 4 to the material transfer component 22, and the material transfer component 22 is used to adjust the circumferential angle of the buckle 4 so that the buckle 4 is transferred to the assembly mechanism 3 at a uniform circumferential angle.

[0029] like Figure 7 As shown, the material transfer assembly 22 includes a rotating seat 221 and an optical detection module 222; the rotating seat 221 is used to drive the button 4 to rotate around its axis, and the optical detection module 222 is arranged on one side of the rotating seat 221, and is used to detect the circumferential angle of the button 4 on the rotating seat 221; specifically, during the rotation of the button 4, the optical detection module 222 detects the circumferential surface of the button 4, and when the button 4 rotates to the set circumferential angle, the rotating seat 221 stops driving.

[0030] In this embodiment, the optical detection module 222 is a light ray sensing module, which includes a transmitter and a receiver, and the transmitter and the receiver are relatively arranged on both sides of the rotating seat 221; specifically, when the axis of the tuning hole 42 of the button 4 is aligned with the direction of the light ray, the light ray emitted by the transmitter can pass through a tuning hole 42 and irradiate the receiver, so as to determine the circumferential angle of the button 4; the infrared ray can pass through any of the tuning holes 42 of the button 4.

[0031] like Figure 7As shown, the material moving assembly 21 is provided with a material receiving seat 211 and a first clamping member 212; the material receiving seat 211 is located below the guide tube 144 and is slidably disposed on one side of the rotating seat 221, and the first clamping member 212 is slidably disposed above the material receiving seat 211 and the rotating seat 221; specifically, after the material receiving seat 211 receives the buckle 4 from below the guide tube 144, it slides toward the rotating seat 221 to leave the vertical area of ​​the guide tube 144, and the first clamping member 212 transfers the buckle 4 from the material receiving seat 211 to the rotating seat 221.

[0032] like Figure 8 As shown, as a preferred scheme, the assembly mechanism 3 includes a feeding tool 31, a pre-stressing component 32, and a spinning component 33; the pre-stressing component 32 and the spinning component 33 are arranged on both sides of the feeding tool 31, and the spinning component 33 is located on the side close to the circumferential positioning mechanism 2; the spinning component 33 takes the buckle 4 out of the circumferential positioning mechanism 2 and places it on the twist nail 6 and pre-stresses it; the spinning component 33 drives the buckle 4 to rotate and press down to screw the buckle 4 onto the twist nail 6; the purpose of setting the pre-stressing process is to pre-tighten the buckle 4 and the twist nail 6, so that when the buckle 4 is subsequently spun, after pressing down to the same height and rotating the same number of times (that is, the height of the buckle 4 is unified and the circumferential angle of the tuning hole 42 is unified), all the buckles 4 are naturally and firmly erected and tightly assembled to ensure product quality.

[0033] like Figure 8 As shown, further, the feeding tool 31 has a first station and a second station, the first station is located below the pre-pressing component 32, and is used to fix and feed the wooden strips 5 installed with the twist nails 6, and the second station is located below the spinning component 33; further, the feeding tool 31 includes a bottom plate 311, two limit plates 312, a reference plate 313, and two groups of side pressure cylinders 314; the bottom plate 311 can be translated along its length direction, the two limit plates 312 are arranged on the top surface of the bottom plate 311, and are located at the edges on both sides of its length direction, the reference plate 313 is arranged between the two limit plates 312, and is located at the front side of the length direction of the bottom plate 311, the two groups of side pressure cylinders 314 are arranged in the middle position of the bottom plate 311, and are respectively arranged opposite to the corresponding limit plates 312, so that the two limit plates 312 and the two groups of side pressure cylinders 314 respectively form the first station and the second station.

[0034] In this embodiment, the worker needs to manually place the wooden strip 5 into the corresponding work station; specifically, one end of the wooden strip 5 is abutted against the reference plate 313 , and then the wooden strip 5 is pushed onto the corresponding limit plate 312 by the side pressure cylinder 314 .

[0035] like Figure 8 As shown, further, the pre-pressing assembly 32 is provided with a second clamping member 321, and the first clamping member 212 is slidably arranged above the rotating seat 221 and the first station, for clamping the buckle 4 on the rotating seat 221 and pre-pressing it on the corresponding twist nail 6 in the first station.

[0036] In this embodiment, the driving devices of the second clamping member 321 and the first clamping member 212 can realize the synchronous operation of the second clamping member 321 and the first clamping member 212, thereby ensuring the uniformity of the process rhythm in the same driving direction.

[0037] like Figure 8 As shown, further, the spinning assembly 33 includes a push-down cylinder 331, a motor 332 and a third clamping member 333; the motor 332 is arranged at the output end of the push-down cylinder 331, and the third clamping member 333 is arranged at the output end of the motor 332; the third clamping member 333 clamps the buckle 4, and through the cooperation of the push-down cylinder 331 and the motor 332, the buckle 4 is screwed into the twist nail 6, thereby realizing the threaded cooperation of the buckle 4 and the twist nail 6.

[0038] like Fig. 9 As shown, in this embodiment, the third clamping member 333 module includes a pair of clamping blocks 3331, a support column 3332 and a pair of transmission columns 3333; the two clamping blocks 3331 are arranged relative to each other and slidingly, and are used to clamp the button 4 from the outside; the support column 3332 is fixedly arranged on the axis of the clamping area of ​​the two clamping blocks 3331, and is used to provide support for the upper end surface of the button 4, which is conducive to pressing the button 4 downward; the two transmission columns 3333 are arranged relative to the two clamping blocks 3331 The transmission column 3333 is adapted to the tuning hole 42 of the button 4 and is used to drive the button 4 to rotate; specifically, the support column 3332 abuts against the upper end surface of the button 4, and when the two clamping blocks 3331 clamp the button 4, the two transmission columns 3333 are inserted into the tuning hole 42 of the button 4; in this way, the support column 3332 and the transmission column 3333 can solve the quality problem of the outer surface being worn and scratched when the clamping block 3331 slips on the surface of the button 4 when the button 4 is pressed down and rotated. Preferably, one end of the transmission column 3333 is tapered to facilitate insertion into the tuning hole 42.

[0039] In this embodiment, the difference between the second clamping member 321 and the third clamping member 333 is that the second clamping member 321 is not provided with a transmission column 3333 ; the difference between the first clamping member 212 and the third clamping member 333 is that the first clamping member 212 is not provided with a transmission column 3333 and a support column 3332 .

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An assembly device for adjusting the gear of a grand piano, characterized in that: It comprises a directional feeding mechanism (1), a circumferential positioning mechanism (2) and an assembly mechanism (3); the directional feeding mechanism (1) comprises a vibrating plate (11), a material hooking rod (12), a material distribution guide (13) and a conveying track (14); the material hooking rod (12) is used to identify and guide the buttons (4) with different front end surfaces into two motion states, the material distribution guide (13) is arranged below the output end of the vibrating plate (11), the material distribution guide (13) has a fork, the conveying track (14) is arranged below the material distribution guide (13), the conveying track (14) has a first channel and a second channel connected to the fork, the first channel extends to the circumferential positioning mechanism (2), and the second channel extends back to the vibrating plate (11); The circumferential positioning mechanism (2) comprises a material moving component (21) and a material transfer component (22); the material moving component (21) is used to receive the button (4) and transfer the button (4) to the material transfer component (22), and the material transfer component (22) is used to adjust the circumferential angle of the button (4); the assembly mechanism (3) comprises a feeding tool (31), a pre-pressing component (32), and a spinning component (33); the feeding tool (31) has a first station and a second station, the first station is located below the pre-pressing component (32), and the second station is located below the spinning component (33); the spinning component (33) is used to take the button (4) out of the circumferential positioning mechanism (2), place it on the twist nail (6) on the wooden strip (5) in turn and pre-press it; the spinning component (33) is used to drive the button (4) to rotate and press down so as to screw the button (4) onto the twist nail (6).

2. The assembly equipment for adjusting the grand piano according to claim 1, characterized in that: One end of the hooking rod (12) is rotatably arranged above the output end of the vibration plate (11), and the other end of the hooking rod (12) has a cone head, which is adapted to the assembly hole (41) of the buckle (4).

3. The assembly equipment for adjusting the grand piano according to claim 2, characterized in that: The material distribution guide (13) includes a first guide plate (131) and a second guide plate (132), one end of the first guide plate (131) and the second guide plate (132) are connected, the other end of the first guide plate (131) is tilted downward along the rear direction of the conveying direction, and the other end of the second guide plate (132) is tilted downward along the front direction of the conveying direction to form the fork.

4. The assembly equipment for adjusting the grand piano according to claim 3, characterized in that: The conveying track (14) comprises a first track plate (141), a second track plate (142) and a side baffle (143); the second track plate (142) is arranged above the first track plate (141) at intervals, the side baffle (143) is located between the first track plate (141) and the second track plate (142), and connects the side surfaces of the first track plate (141) and the second track plate (142), so that the first channel is formed above the first track plate (141), and the second channel is formed above the second track plate (142); the output end of the first track plate (141) extends relative to the second track plate (142), so that the first guide plate (131) avoids the second track plate (142) and extends to the top of the first track plate (141), and the second guide plate (132) extends to the second track plate (142).

5. The assembly equipment for adjusting the grand piano according to claim 4, characterized in that: The first track plate (141) and the second track plate (142) are connected to the side baffle plate (143) on a side that is inclined downward.

6. The assembly equipment for adjusting the grand piano according to claim 4, characterized in that: The conveying track (14) further comprises a guide tube (144), one end of which is connected to the first track plate (141) and the other end of which is connected to the circumferential positioning mechanism (2), and the conveying route of the guide tube (144) is bent downward from horizontal to vertical.

7. The assembly equipment for adjusting the grand piano according to claim 1, characterized in that: The material transfer assembly (22) comprises a rotating seat (221) and an optical detection module (222); the rotating seat (221) is used to drive the button (4) to rotate around its axis, and the optical detection module (222) is arranged on one side of the rotating seat (221) and is used to detect the circumferential angle of the button (4) on the rotating seat (221).

8. The assembly equipment for adjusting the grand piano according to claim 7, characterized in that: The optical detection module (222) is a light ray sensing module, comprising a transmitter and a receiver, wherein the transmitter and the receiver are arranged oppositely on two sides of the rotating seat (221).

9. The assembly equipment for adjusting the grand piano according to claim 1, characterized in that: The spinning assembly (33) comprises a push-down cylinder (331), a motor (332) and a third clamping member (333); the motor (332) is arranged at the output end of the push-down cylinder (331), and the third clamping member (333) is arranged at the output end of the motor (332).

10. The assembly equipment for adjusting the grand piano according to claim 9, characterized in that: The third clamping comprises a pair of clamping blocks (3331), a support column (3332) and a pair of transmission columns (3333); the two clamping blocks (3331) are arranged relative to each other and slidably, the support column (3332) is fixedly arranged on the axis of the clamping area of ​​the two clamping blocks (3331), and the two transmission columns (3333) are arranged relative to each other on the two clamping blocks (3331), and the transmission columns (3333) are adapted to the tuning holes (42) of the buckle (4).

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