Automatic frequency modulation system of gong plate

Abstract

The invention discloses an automatic frequency modulation system for a gong plate, which comprises a storage device, a feeding device, a transfer device, a sounding support device, a pickup module, a grinding device, an air blowing and dust collecting device, a discharging device, a qualified product receiving device, an unqualified product receiving device and a PLC (Programmable Logic Controller) control module, the PLC control module controls the storage device, the feeding device, the transfer device, the sound production supporting device, the pickup module, the grinding device, the air blowing and dust suction device, the discharging device, the qualified product receiving device and the unqualified product receiving device to work cooperatively, and automatic frequency modulation of the gong plate is achieved. The invention has the advantages that the frequency modulation precision does not depend on the professional quality of a worker, is not influenced by the professional quality of the worker, can reach + / -1 tone score, can ensure the accuracy and stability of the sound production of the sound reed, improves the consistency of the sound reed plate, and has low requirements on operators, low labor intensity and high efficiency.

Description

Technical Field

[0001] The present invention relates to an automatic frequency modulation system, and more particularly to an automatic frequency modulation system for a reed plate. Background Art

[0002] The reed plate is an important component for a harmonica to produce sound. The reed plate consists of a base plate and a plurality of reed pieces mounted on the base plate. The plurality of reed pieces are arranged at intervals. One end of each reed piece is riveted to the base plate, and the other end is suspended. The quality of the reed piece determines the quality of the reed plate, and thus determines the accuracy and stability of the sound produced by the harmonica.

[0003] The existing frequency modulation of the reed plate is mainly completed manually. The pipeline is evacuated to the rated pressure by a vacuum pump. Using the pressure difference between the pipeline and the atmosphere, an air flow is formed on the tool at the outlet of the pipeline. The worker places the reed plate on the tool at the outlet of the pipeline, so that the reed piece deforms under the action of air and starts to vibrate and produce sound. The microphone converts the sound information into an electrical signal, and the oscilloscope converts the electrical signal into a visible graph. The worker compares the real-time graph with the standard graph to judge the grinding position and grinding depth of the reed piece, and grinds the reed piece with an electric grinding head. Repeat the above operations until all the reed pieces on the reed plate produce the correct sound. For the reed piece frequency modulated by this method, the accuracy is within ±5 cents.

[0004] However, the existing frequency modulation method of the reed plate has relatively high requirements for the professional quality of workers. The frequency modulation accuracy mainly depends on the professional quality of workers. Affected by the level of workers' professional quality, it is difficult to ensure the accuracy and stability of the sound produced by the reed piece, resulting in low consistency of the reed plate. Moreover, during the manual grinding process, it is easy to repeatedly grind and damage the reed piece, and it requires workers to concentrate for a long time, with a large labor intensity and low efficiency. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an automatic frequency modulation system for a reed plate that can ensure the accuracy and stability of the sound produced by the reed piece, improve the consistency of the reed plate, and has low requirements for operators, small labor intensity, and high efficiency.

[0006] The technical solution adopted by the present invention to solve the above technical problems is as follows: An automatic frequency modulation system for a sound reed board, comprising a material storage device, a feeding device, a transfer device, a sound emission support device, a sound pickup module, a grinding device, a blowing and dust suction device, a blanking device, a qualified product collection device, a non-conforming product collection device, and a PLC control module; the PLC control module prestores the equipment frequency modulation range and the tolerance range of the standard pitch value of each sound reed of the sound reed board; the material storage device is used to store the sound reed board to be frequency modulated and push the sound reed board to be frequency modulated, so that one sound reed board moves to a preset feeding and grasping position each time; the feeding device is used to transfer the sound reed board at the feeding and grasping position to a preset feeding position at the transfer device; the transfer device is used to move the sound reed board at the feeding position, so that the sound reeds on the sound reed board move to a preset frequency modulation position in sequence, and transfer the sound reed board after frequency modulation to a preset cleaning position first, and then transfer it from the cleaning position to a preset blanking position; the grinding device is used to grind the sound reeds judged to have non-standard sound emission at the frequency modulation position; the sound emission support device is used to drive the sound reeds at the frequency modulation position to vibrate and emit sound and provide support for the sound reeds during the grinding process of the grinding device on the sound reeds; the sound pickup module is used to capture the pitch of each sound reed vibrating and emitting sound at the frequency modulation position and output it to the PLC control module; when the PLC control module receives the pitch of a certain sound reed output to it by the sound pickup module, it first judges whether the pitch of the sound reed is within the tolerance range of the standard pitch value of the sound reed. If it is within the tolerance range of the standard pitch value of the sound reed, it is considered that the sound reed has standard sound emission. If it is not within the tolerance range of the standard pitch value of the sound reed, it continues to judge whether the pitch of the sound reed is within the equipment frequency modulation range. If it is within the equipment frequency modulation range, it is considered that the sound reed has non-standard sound emission. If it is not within the equipment frequency modulation range, it is considered that the sound reed has unqualified sound emission; when the sound reed has standard sound emission and the sound reed is not the last sound reed of the sound reed board, the PLC control module first controls the transfer device to move the sound reed board at its position, so that the sound reed leaves the frequency modulation position while the next sound reed enters the frequency modulation position; when the sound reed has standard sound emission and the sound reed is the last sound reed of the sound reed board, the PLC control module judges the sound reed board as a qualified product, the frequency modulation of the sound reed board ends, and controls the transfer device to move the sound reed board to a preset cleaning position; when the sound reed has unqualified sound emission, the PLC control module judges the sound reed board as a non-conforming product, the frequency modulation of the sound reed board ends, and controls the transfer device to move the sound reed board to a preset cleaning position;When the pronunciation of the reed is not standard, the PLC control module first controls the pronunciation support device to support the suspended part of the reed, and then controls the grinding device to grind the reed once according to a preset grinding amount. After this grinding is completed, the PLC control module first controls the pronunciation support device to reset and separate from the reed, and then controls the pronunciation support device to drive the reed to vibrate and pronounce again. The sound pickup module captures the pronunciation pitch of the reed again and sends it to the PLC control module. The PLC control module makes a judgment again, and this cycle continues until the pronunciation of the reed is standard or unqualified; the air blowing and dust suction device is used to blow air and suck dust from the reed board at the cleaning position to collect the dust generated after the grinding device grinds the reed; the blanking device is used to transport the qualified reed board to the preset qualified product blanking position at the qualified product receiving device or transport the unqualified reed board to the preset unqualified product blanking position at the unqualified product receiving device after the air blowing and dust suction device blows air and sucks dust from the reed board at the cleaning position; the qualified product receiving device is used for collecting and storing qualified products; the unqualified product receiving device is used for collecting and storing unqualified products; the PLC control module is used to control the storage device, the feeding device, the transfer device, the pronunciation support device, the sound pickup module, the grinding device, the air blowing and dust suction device, the blanking device, the qualified product receiving device and the unqualified product receiving device to work together.

[0007] Compared with the prior art, the advantages of the present invention are that an automatic frequency modulation system for a sound reed board is constructed by a material storage device, a feeding device, a transfer device, a sounding support device, a sound pickup module, a grinding device, a blowing and dust suction device, a discharging device, a qualified product collecting device, a non-qualified product collecting device and a PLC control module. The PLC control module pre-stores the equipment frequency modulation range and the tolerance range of the standard pitch value of each sound reed of the sound reed board. The PLC control module controls the material storage device, the feeding device, the transfer device, the sounding support device, the sound pickup module, the grinding device, the blowing and dust suction device, the discharging device, the qualified product collecting device and the non-qualified product collecting device to work together. The sound reed board to be frequency modulated is placed at the material storage device in sequence. The material storage device pushes the sound reed board to be frequency modulated under the control of the PLC control module, so that each time one sound reed board moves to a preset feeding and grasping position. When a sound reed board moves to the preset feeding and grasping position, the feeding device transfers the sound reed board at the feeding and grasping position to a preset feeding position at the transfer device. The transfer device moves the sound reed board at the feeding position under the control of the PLC control module, so that the sound reeds on the sound reed board move to the preset frequency modulation position in sequence. When a certain sound reed moves to the preset frequency modulation position, the sounding support device drives the sound reed at the frequency modulation position to vibrate and sound under the control of the PLC control module. The sound pickup module captures the pitch of the sound reed vibrating and sounding at the frequency modulation position under the control of the PLC control module and outputs it to the PLC control module. The PLC control module first judges whether the pitch of the sound reed is within the tolerance range of the standard pitch value of the sound reed. If it is within the tolerance range of the standard pitch value of the sound reed, it is considered that the sound reed sounds standard. If it is not within the tolerance range of the standard pitch value of the sound reed, it continues to judge whether the pitch of the sound reed is within the equipment frequency modulation range. If it is within the equipment frequency modulation range, it is considered that the sound reed sounds non-standard. If it is not within the equipment frequency modulation range, it is considered that the sound reed sounds unqualified. When the sound reed sounds standard and the sound reed is not the last sound reed of the sound reed board, the PLC control module first controls the transfer device to move the sound reed board at its place, so that the sound reed leaves the frequency modulation position while the next sound reed enters the frequency modulation position. When the sound reed sounds standard and the sound reed is the last sound reed of the sound reed board, the PLC control module judges the sound reed board as a qualified product, the frequency modulation of the sound reed board ends, and controls the transfer device to move the sound reed board to a preset cleaning position. When the sound reed sounds unqualified, the PLC control module judges the sound reed board as a non-qualified product, the frequency modulation of the sound reed board ends, and controls the transfer device to move the sound reed board to a preset cleaning position;When the pronunciation of the reed is not standard, the PLC control module first controls the pronunciation support device to support the suspended part of the reed, and then controls the grinding device to grind the reed once according to the preset grinding amount. After this grinding is completed, the PLC control module first controls the pronunciation support device to reset and separate from the reed, and then controls the pronunciation support device to drive the reed to vibrate and pronounce again. The sound pickup module captures the pronunciation pitch of the reed again and sends it to the PLC control module, and the PLC control module makes a judgment again. This cycle continues until the pronunciation of the reed is standard or unqualified; when the reed board is moved to the preset cleaning position, the air blowing and dust suction device blows air and sucks dust from the reed board at the cleaning position under the control of the PLC control module to collect the dust generated after the grinding device grinds the reed. After the air blowing and dust suction device finishes blowing air and sucking dust from the reed board at the cleaning position, the blanking device transports the qualified reed board to the preset qualified product blanking position at the qualified product receiving device or transports the unqualified reed board to the preset unqualified product blanking position at the unqualified product receiving device under the control of the PLC control module. When the qualified product is transported to the preset qualified product blanking position at the qualified product receiving device, the qualified product receiving device collects and stores the qualified product under the control of the PLC control module. When the unqualified product is transported to the preset unqualified product blanking position at the unqualified product receiving device, the unqualified product receiving device collects and stores the unqualified product. Thus, the present invention realizes the automatic frequency modulation of the reed board. Its frequency modulation accuracy does not depend on the professional quality of workers and is not affected by the high or low professional quality of workers. The frequency modulation accuracy can reach ±1 pitch, which can ensure the accuracy and stability of the pronunciation of the reed, improve the consistency of the reed board, and has low requirements for operators, small labor intensity, and high efficiency.;

[0008] Further, the material storage device includes a material storage platform, a blocking block, a photoelectric sensor, two guiding bars, and a feeding mechanism. The two guiding bars are referred to as two first guiding bars, and the photoelectric sensor is referred to as the first photoelectric sensor; the first photoelectric sensor is connected to the PLC control module; the feeding mechanism is located below the material storage platform. The feeding mechanism includes a first single-axis servo module, a first lower connecting plate, a first upper connecting plate, four first product pressing blocks, a first buffer spring, a first limiting block, two first linear guide rails, a first baffle, and a photoelectric sensor, which is referred to as the second photoelectric sensor; the first single-axis servo module and the second photoelectric sensor are both connected to the PLC control module; the first single-axis servo module is located below the material storage platform, the first single-axis servo module is installed on the material storage platform, the first lower connecting plate is installed on the first single-axis servo module, and the first single-axis servo module is used to drive the first lower connecting plate to move back and forth. The two first linear guide rails are distributed left and right at intervals above the first lower connecting plate and are respectively fixed on the first lower connecting plate. Each first linear guide rail is provided with a slider that can move back and forth along it. The first upper connecting plate is located above the two first linear guide rails and is fixed on the sliders of the two first linear guide rails; the first buffer spring is located behind the first upper connecting plate, and the front end of the first buffer spring is connected to the first upper connecting plate; the first limiting block is located behind the first lower connecting plate and is fixed on the first lower connecting plate; the rear end of the first buffer spring is connected to the first limiting block; the first baffle is located between the first upper connecting plate and the first lower connecting plate and is fixed on the first upper connecting plate; the second photoelectric sensor is installed on the first lower connecting plate and is used to determine whether the tone spring plate at the feeding and grasping position is clamped by sensing the first baffle. When the second photoelectric sensor senses the first baffle, it indicates that the tone spring plate at the feeding and grasping position is clamped. At this time, the second photoelectric sensor generates a trigger signal and sends it to the PLC control module, and the PLC control module controls the feeding device to enter the working state;Four first product pressing blocks are distributed at intervals on the left and right above the first upper connecting plate. The bottoms of the four first product pressing blocks are respectively fixed on the first upper connecting plate. The upper parts of the four first product pressing blocks extend above the material storage platform. The blocking block is located above the material storage platform and is fixed on the material storage platform. Two first guiding strips are fixed in parallel at intervals on the left and right on the material storage platform. The front parts of the two first guiding strips are respectively located on the left and right sides of the blocking block. A sound spring plate storage area is formed among the blocking block, the two first guiding strips and the four first product pressing blocks. The area near the blocking block in the sound spring plate storage area is the loading and grasping position. When the sound spring plate is at the loading and grasping position, it will be blocked by the blocking block and cannot move forward. The first photoelectric sensor is installed on the blocking block and is used to sense whether a sound spring plate reaches the loading and grasping position. When it senses that a sound spring plate reaches the loading and grasping position, it generates a trigger signal and sends it to the PLC control module.;

[0009] Further, the loading device includes a loading YZ two-axis servo module, a loading flipping and sucking mechanism, a vacuum generator and a pressure sensor. This pressure sensor is called the first pressure sensor, and this vacuum generator is called the first vacuum generator. The loading YZ two-axis servo module, the first vacuum generator and the first pressure sensor are all connected to the PLC control module; the first pressure sensor is connected to the first vacuum generator through an air pipe. The loading flipping and sucking mechanism is used to suck the sound spring plate. The loading YZ two-axis servo module is used to drive the loading flipping and sucking mechanism to move between the loading and grasping position and the transfer device, suck the sound spring plate at the loading and grasping position and transfer it to the transfer device; the loading flipping and sucking mechanism includes a flipping cylinder and two suction cups. This flipping cylinder is called the first flipping cylinder, and these two suction cups are called two first suction cups. The first flipping cylinder is connected to the PLC control mechanism. The first flipping cylinder is installed on the loading YZ two-axis servo module. The two first suction cups are installed at intervals on the first flipping cylinder. The first flipping cylinder is used to drive the two first suction cups to rotate. Each first suction cup is respectively connected to the first vacuum generator through an air pipe. The first vacuum generator is used to make the two first suction cups generate negative pressure. The first pressure sensor is used to monitor whether the pressure value provided by the first vacuum generator reaches a preset value. When it monitors that the pressure value provided by the first vacuum generator reaches the preset value, it generates a trigger signal and sends it to the PLC control module.

[0010] Further, the transfer device includes an X-axis servo module and a reed board fixing mechanism. The X-axis servo module is connected to the PLC control module. The reed board fixing mechanism includes a reed board fixing tooling, two groups of pneumatic grippers, and a fiber optic sensor. Each group of pneumatic grippers includes three pneumatic grippers. The six pneumatic grippers and the fiber optic sensor are all connected to the PLC control module. The reed board fixing tooling is installed on the X-axis servo module and is used to receive the reed board transported by the feeding device. The X-axis servo module is used to drive the reed board fixing tooling to move linearly. The two groups of pneumatic grippers are respectively installed on both sides of the reed board fixing tooling and are symmetrically arranged. An upper feeding position is formed between the two groups of pneumatic grippers. The fiber optic sensor is installed on the reed board fixing tooling and is used to detect whether a reed board reaches the upper feeding position. After the reed board reaches the upper feeding position, a trigger signal is generated and sent to the PLC control module.

[0011] Further, the sounding support device includes a vacuum pump, an air chamber, an air chamber connecting plate, a Z-axis servo module, a Y-axis servo module, and a support rod. The Z-axis servo module and the Y-axis servo module are both connected to the PLC control module. The air chamber connecting plate is installed on the Z-axis servo module. The Y-axis servo module and the air chamber are respectively installed on the air chamber connecting plate. The vacuum pump is connected to the air chamber through an air pipe. The vacuum pump is used to provide negative pressure to form an air flow inside the air chamber. When an air flow is formed inside the air chamber, the air chamber can cause the reed piece located above it to vibrate and sound. The support rod is installed on the Y-axis servo module and is used to support the suspended part of the reed piece during the grinding process by the grinding device. The Y-axis servo module is used to drive the support rod to move back and forth. The Z-axis servo module is used to drive the air chamber connecting plate, the air chamber, the Y-axis servo module, and the support rod to move up and down.

[0012] Further, the grinding device includes an XYZ three-axis servo module and an electric grinding head. The XYZ three-axis servo module and the electric grinding head are respectively connected to the PLC control module. The electric grinding head is installed on the XYZ three-axis servo module. The XYZ three-axis servo module is used to drive the electric grinding head to move forward, backward, left, right, up, and down. The electric grinding head is used for the grinding treatment of the reed piece.

[0013] Further, the air blowing and dust suction device includes a cylinder, a dust collector, two solenoid valves, two air nozzles and a protective cover. The two solenoid valves, the dust collector and the cylinder are all connected to the PLC control module. The two solenoid valves are used to control the connection of the two air nozzles to the external air source one by one. The protective cover is installed on the output rod of the cylinder. The cylinder is used to drive the lifting of the protective cover. The protective cover is used to prevent dust from leaking during the air blowing and dust suction process. The air blowing and dust suction device is connected to the protective cover and is used for dust absorption. The air nozzles are installed on both sides of the protective cover and are symmetrically arranged for blowing the dust away.

[0014] Further, the blanking device includes a blanking YZ two-axis servo module, a blanking turning and sucking mechanism, a vacuum generator and a pressure sensor. This pressure sensor is called the second pressure sensor, and this vacuum generator is called the second vacuum generator. The blanking YZ two-axis servo module, the second vacuum generator and the second pressure sensor are all connected to the PLC control module. The second pressure sensor is connected to the second vacuum generator through an air pipe. The blanking turning and sucking mechanism is used to suck the sound spring plate. The blanking YZ two-axis servo module is used to drive the blanking turning and sucking mechanism to move between the blanking position and the qualified product receiving device, or between the blanking position and the unqualified product receiving device, and transfer the sound spring plate at the blanking position to the qualified product blanking position of the qualified product receiving device or the unqualified product blanking position of the unqualified product receiving device. The blanking turning and sucking mechanism includes a turning cylinder and two suction cups. This turning cylinder is called the second turning cylinder, and these two suction cups are called two second suction cups. The second turning cylinder is connected to the PLC control mechanism. The second turning cylinder is installed on the blanking YZ two-axis servo module. The two second suction cups are installed on the second turning cylinder at intervals. The second turning cylinder is used to drive the two second suction cups to rotate. Each second suction cup is respectively connected to the second vacuum generator through an air pipe. The second vacuum generator is used to make the two second suction cups generate negative pressure. The second pressure sensor is used to monitor whether the pressure value provided by the second vacuum generator reaches the preset value, and when it monitors that the pressure value provided by the second vacuum generator reaches the preset value, it generates a trigger signal and sends it to the PLC control module.

[0015] Further, the qualified product receiving device includes a receiving platform, a fixed block, a proximity sensor, two guiding bars, two blanking and pushing mechanisms, and a blanking feeding mechanism. The two guiding bars are referred to as two second guiding bars, and the proximity sensor is referred to as the first proximity sensor. The first proximity sensor is connected to the PLC control module. The fixed block is located above the receiving platform and fixed on the receiving platform. The blanking feeding mechanism is located below the receiving platform. The blanking feeding mechanism includes a second single-axis servo module, a second lower connecting plate, a second upper connecting plate, four second product pressing blocks, a second buffer spring, a second limiting block, two second linear guide rails, a second baffle plate, and a photoelectric sensor. The photoelectric sensor is referred to as the third photoelectric sensor. The second single-axis servo module and the third photoelectric sensor are both connected to the PLC control module. The second single-axis servo module is located below the receiving platform and installed on the receiving platform. The second lower connecting plate is installed on the second single-axis servo module. The second single-axis servo module is used to drive the second lower connecting plate to move back and forth. The two second linear guide rails are distributed left and right at intervals above the second lower connecting plate and are respectively fixed on the second lower connecting plate. Each second linear guide rail is provided with a slider that can move back and forth along it. The second upper connecting plate is located above the two second linear guide rails and fixed on the sliders of the two second linear guide rails. The second buffer spring is located behind the second upper connecting plate, and the front end of the second buffer spring is connected to the second upper connecting plate. The second limiting block is located behind the second lower connecting plate and fixed on the second lower connecting plate. The rear end of the second buffer spring is connected to the second limiting block. The second baffle plate is located between the second upper connecting plate and the second lower connecting plate and fixed on the second upper connecting plate. The third photoelectric sensor is installed on the second lower connecting plate and is used to judge whether the tone spring plate at the qualified product blanking position has been removed by sensing the second baffle plate. When the qualified product blanking position is empty, when the third photoelectric sensor senses the second baffle plate, it indicates that the qualified product blanking position is empty. At this time, the third photoelectric sensor generates a trigger signal and sends it to the PLC control module.Four second product compressing blocks are distributed at intervals on the left and right above the second upper connecting plate. The bottoms of the four second product compressing blocks are respectively fixed on the second upper connecting plate, and the upper parts of the four second product compressing blocks extend above the material receiving platform. Two second guiding bars are fixedly arranged in parallel at intervals on the left and right on the material receiving platform. The rear parts of the two second guiding bars are respectively located on the left and right sides of the first proximity sensor, and the front parts are respectively located on the left and right sides of the fixed block. A qualified product collection area is formed among the fixed block, the two second guiding bars and the four second product compressing blocks. The position near the fixed block in the qualified product collection area is the qualified product discharging position. When the first proximity sensor senses the sound reed plate, it indicates that the qualified products in the qualified product collection area are full, and a trigger signal is generated and sent to the PLC control module. Two blanking pushing mechanisms are respectively arranged on the left and right sides of the blanking feeding mechanism and are symmetrically distributed. Each blanking pushing mechanism includes a pushing cylinder, a lifting cylinder and a sound reed plate pusher. The pushing cylinder is installed on the material receiving platform, the lifting cylinder is installed on the output shaft of the pushing cylinder, the pushing cylinder is used to drive the lifting cylinder to move back and forth, the sound reed plate pusher is installed on the output shaft of the lifting cylinder, the lifting cylinder is used to drive the sound reed plate pusher to move up and down, and the sound reed plate pusher can move from below the material receiving platform to above it.

[0016] Further, the unqualified product receiving device includes a waste box, a sensor bracket, a photoelectric sensor, and a proximity sensor. This photoelectric sensor is called the fourth photoelectric sensor, and this proximity sensor is called the second proximity sensor. Both the fourth photoelectric sensor and the second proximity sensor are connected to the PLC control module. The fourth photoelectric sensor is located above the waste box and is installed on the sensor bracket. The second proximity sensor is located below the waste box and is installed on the sensor bracket. The unqualified product discharging position is arranged in the waste box. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the automatic frequency modulation system of the sound reed plate of the present invention;

[0018] Figure 2(a) is a schematic diagram of the storage device of the automatic frequency modulation system of the sound reed plate of the present invention;

[0019] Figure 2(b) is a schematic diagram of the feeding mechanism of the storage device of the automatic frequency modulation system of the sound reed plate of the present invention;

[0020] Figure 3(a) is a schematic diagram of the feeding device of the automatic frequency modulation system of the sound reed plate of the present invention;

[0021] Figure 3(b) is a schematic diagram of the loading and flipping suction mechanism of the loading device of the automatic frequency modulation system of the sound reed board of the present invention;

[0022] Figure 4(a) is a schematic diagram of the transfer device of the automatic frequency modulation system of the sound reed board of the present invention;

[0023] Figure 4(b) is a schematic diagram of the sound reed board fixing mechanism of the transfer device of the automatic frequency modulation system of the sound reed board of the present invention;

[0024] Figure 5 is a schematic diagram of the grinding device of the automatic frequency modulation system of the sound reed board of the present invention;

[0025] Figure 6 is a schematic diagram of the pronunciation support device of the automatic frequency modulation system of the sound reed board of the present invention;

[0026] Figure 7 is a schematic diagram of the air blowing and dust suction device of the automatic frequency modulation system of the sound reed board of the present invention;

[0027] Figure 8(a) is a schematic diagram of the unloading device of the automatic frequency modulation system of the sound reed board of the present invention;

[0028] Figure 8(b) is a schematic diagram of the unloading and flipping suction mechanism of the unloading device of the automatic frequency modulation system of the sound reed board of the present invention;

[0029] Figure 9(a) is a schematic diagram of the qualified product receiving device of the automatic frequency modulation system of the sound reed board of the present invention;

[0030] Figure 9(b) is a schematic diagram of the unloading feeding mechanism of the qualified product receiving device of the automatic frequency modulation system of the sound reed board of the present invention;

[0031] Figure 9(c) is a schematic diagram of the unloading pushing mechanism of the qualified product receiving device of the automatic frequency modulation system of the sound reed board of the present invention;

[0032] Figure 10 is a schematic diagram of the unqualified product receiving device of the automatic frequency modulation system of the sound reed board of the present invention. Detailed implementation manners

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0034] Embodiment 1: As Figure 1As shown in the figure, an automatic frequency modulation system for a sound reed board includes a material storage device 1, a feeding device 2, a transfer device 3, a sounding support device 4, a sound pickup module, a grinding device 5, a blowing and dust suction device, a blanking device 6, a qualified product collection device 7, a non - qualified product collection device 8, and a PLC control module; the PLC control module pre - stores the equipment frequency modulation range and the tolerance range of the standard pitch value of each sound reed of the sound reed board; the material storage device 1 is used to store the sound reed board to be frequency - modulated and push the sound reed board to be frequency - modulated so that one sound reed board moves to a preset feeding grasping position each time; the feeding device 2 is used to transfer the sound reed board at the feeding grasping position to a preset feeding position at the transfer device 3; the transfer device 3 is used to move the sound reed board at the feeding position so that the sound reeds on the sound reed board move to a preset frequency modulation position in sequence, and to transfer the sound reed board after frequency modulation to a preset cleaning position first, and then from the cleaning position to a preset blanking position; the grinding device 5 is used to grind the sound reeds judged to have non - standard sounding at the frequency modulation position; the sounding support device 4 is used to drive the sound reeds at the frequency modulation position to vibrate and sound and provide support for the sound reeds during the grinding process of the grinding device 5 on the sound reeds; the sound pickup module is used to capture the pitch of each sound reed vibrating and sounding at the frequency modulation position and output it to the PLC control module; when the PLC control module receives the pitch of a certain sound reed output to it by the sound pickup module, it first judges whether the pitch of the sound reed is within the tolerance range of the standard pitch value of the sound reed. If it is within the tolerance range of the standard pitch value of the sound reed, it is considered that the sound reed sounds standard. If it is not within the tolerance range of the standard pitch value of the sound reed, it continues to judge whether the pitch of the sound reed is within the equipment frequency modulation range. If it is within the equipment frequency modulation range, it is considered that the sound reed sounds non - standard. If it is not within the equipment frequency modulation range, it is considered that the sound reed sounds unqualified; when the sound reed sounds standard and the sound reed is not the last sound reed of the sound reed board, the PLC control module first controls the transfer device 3 to move the sound reed board at its position so that the sound reed leaves the frequency modulation position while the next sound reed enters the frequency modulation position; when the sound reed sounds standard and the sound reed is the last sound reed of the sound reed board, the PLC control module judges the sound reed board as a qualified product, the frequency modulation of the sound reed board ends, and controls the transfer device 3 to move the sound reed board to a preset cleaning position; when the sound reed sounds unqualified, the PLC control module judges the sound reed board as a non - qualified product, the frequency modulation of the sound reed board ends, and controls the transfer device 3 to move the sound reed board to a preset cleaning position;When the pronunciation of the reed is not standard, the PLC control module first controls the pronunciation support device 4 to support the suspended part of the reed, and then controls the grinding device 5 to grind the reed once according to the preset grinding amount. After this grinding is completed, the PLC control module first controls the pronunciation support device 4 to reset and separate from the reed, and then controls the pronunciation support device 4 to drive the reed to vibrate and pronounce again. The sound pickup module captures the pronunciation pitch of the reed again and sends it to the PLC control module, and the PLC control module makes a judgment again. This cycle continues until the pronunciation of the reed is standard or unqualified; the air blowing and dust suction device is used to blow air and suck dust from the reed board at the cleaning position to collect the dust generated after the grinding device 5 grinds the reed; the blanking device 6 is used to move the qualified reed board to the preset qualified product blanking position at the qualified product receiving device 7 or move the unqualified reed board to the preset unqualified product blanking position at the unqualified product receiving device 8 after the air blowing and dust suction device blows air and sucks dust from the reed board at the cleaning position; the qualified product receiving device 7 is used for collecting and storing qualified products; the unqualified product receiving device 8 is used for collecting and storing unqualified products; the PLC control module is used to control the storage device 1, the feeding device 2, the transfer device 3, the pronunciation support device 4, the sound pickup module, the grinding device 5, the air blowing and dust suction device, the blanking device 6, the qualified product receiving device 7 and the unqualified product receiving device 8 to work together.

[0035] In this embodiment, the tuning fork plates to be frequency-tuned are sequentially placed at the storage device 1. The storage device 1 pushes the tuning fork plates to be frequency-tuned under the control of the PLC control module, so that each time one tuning fork plate moves to the preset feeding and grasping position. When a tuning fork plate moves to the preset feeding and grasping position, the feeding device 2 transfers the tuning fork plate at the feeding and grasping position to the preset feeding position at the transfer device 3. The transfer device 3 moves the tuning fork plate at the feeding position under the control of the PLC control module, so that the tuning fork pieces on the tuning fork plate move to the preset frequency-tuning position in sequence. When a certain tuning fork piece moves to the preset frequency-tuning position, the sounding support device 4 drives the tuning fork piece at the frequency-tuning position to vibrate and sound under the control of the PLC control module. The sound pickup module captures the sounding cents when the tuning fork piece at the frequency-tuning position vibrates and sounds under the control of the PLC control module and outputs them to the PLC control module; the PLC control module first judges whether the sounding cents of the tuning fork piece are within the tolerance range of the standard sounding cent value of the tuning fork piece. If they are within the tolerance range of the standard sounding cent value of the tuning fork piece, it is considered that the tuning fork piece sounds standard. If they are not within the tolerance range of the standard sounding cent value of the tuning fork piece, it continues to judge whether the sounding cents of the tuning fork piece are within the equipment frequency-tuning range. If they are within the equipment frequency-tuning range, it is considered that the tuning fork piece sounds non-standard. If they are not within the equipment frequency-tuning range, it is considered that the tuning fork piece sounds unqualified; when the tuning fork piece sounds standard and the tuning fork piece is not the last tuning fork piece of the tuning fork plate, the PLC control module first controls the transfer device 3 to move the tuning fork plate at its position, so that the tuning fork piece leaves the frequency-tuning position while the next tuning fork piece enters the frequency-tuning position; when the tuning fork piece sounds standard and the tuning fork piece is the last tuning fork piece of the tuning fork plate, the PLC control module judges the tuning fork plate as a qualified product, the frequency tuning of the tuning fork plate is completed, and controls the transfer device 3 to move the tuning fork plate to the preset cleaning position; when the tuning fork piece sounds unqualified, the PLC control module judges the tuning fork plate as an unqualified product, the frequency tuning of the tuning fork plate is completed, and controls the transfer device 3 to move the tuning fork plate to the preset cleaning position; when the tuning fork piece sounds non-standard, the PLC control module first controls the sounding support device 4 to support the suspended part of the tuning fork piece, and then controls the grinding device 5 to perform a grinding on the tuning fork piece according to the preset grinding amount. After this grinding is completed, the PLC control module first controls the sounding support device 4 to reset and separate from the tuning fork piece, and then controls the sounding support device 4 to drive the tuning fork piece to vibrate and sound again. The sound pickup module captures the sounding cents of the tuning fork piece again and sends them to the PLC control module, and the PLC control module makes a judgment again, and so on in a loop until the tuning fork piece sounds standard or sounds unqualified;When the reed board is moved to the preset cleaning position, the air blowing and dust suction device blows air and sucks dust from the reed board at the cleaning position under the control of the PLC control module to collect the dust generated after the grinding device 5 grinds the reed piece. After the air blowing and dust suction device finishes blowing air and sucking dust from the reed board at the cleaning position, the blanking device 6 transports the qualified reed board to the preset qualified product blanking position at the qualified product receiving device 7 or transports the unqualified reed board to the preset unqualified product blanking position at the unqualified product receiving device 8 under the control of the PLC control module. When the qualified product is transported to the preset qualified product blanking position at the qualified product receiving device 7, the qualified product receiving device 7 collects and stores the qualified product under the control of the PLC control module. When the unqualified product is transported to the preset unqualified product blanking position at the unqualified product receiving device 8, the unqualified product receiving device 8 collects and stores the unqualified product, thus realizing the automatic frequency modulation of the reed board.;

[0036] Embodiment 2: This embodiment is basically the same as Embodiment 1, except that: in this embodiment, as shown in FIGS. 2(a) and 2(b), the storage device 1 includes a storage platform 9, a blocking block 10, a photoelectric sensor, two guiding bars, and a loading and feeding mechanism 12. The two guiding bars are referred to as two first guiding bars 13, and the photoelectric sensor is referred to as the first photoelectric sensor 11; the first photoelectric sensor 11 is connected to the PLC control module; the loading and feeding mechanism 12 is located below the storage platform 9. The loading and feeding mechanism 12 includes a first single-axis servo module 14, a first lower connecting plate 15, a first upper connecting plate 16, four first product pressing blocks 17, a first buffer spring 18, a first limiting block 19, two first linear guide rails 20, a first baffle 21, and a photoelectric sensor, which is referred to as the second photoelectric sensor 22; both the first single-axis servo module 14 and the second photoelectric sensor 22 are connected to the PLC control module; the first single-axis servo module 14 is located below the storage platform 9, the first single-axis servo module 14 is installed on the storage platform 9, the first lower connecting plate 15 is installed on the first single-axis servo module 14, and the first single-axis servo module 14 is used to drive the first lower connecting plate 15 to move back and forth. The two first linear guide rails 20 are distributed at intervals left and right above the first lower connecting plate 15 and are respectively fixed on the first lower connecting plate 15. Each first linear guide rail 20 is provided with a slider that can move back and forth along it. The first upper connecting plate 16 is located above the two first linear guide rails 20 and is fixed on the sliders of the two first linear guide rails 20; the first buffer spring 18 is located behind the first upper connecting plate 16, and the front end of the first buffer spring 18 is connected to the first upper connecting plate 16; the first limiting block 19 is located behind the first lower connecting plate 15 and is fixed on the first lower connecting plate 15; the rear end of the first buffer spring 18 is connected to the first limiting block 19; the first baffle 21 is located between the first upper connecting plate 16 and the first lower connecting plate 15 and is fixed on the first upper connecting plate 16; the second photoelectric sensor 22 is installed on the first lower connecting plate 15 and is used to determine whether the tone spring plate at the loading and grasping position is clamped by sensing the first baffle 21. When the second photoelectric sensor 22 senses the first baffle 21, it indicates that the tone spring plate at the loading and grasping position is clamped. At this time, the second photoelectric sensor 22 generates a trigger signal and sends it to the PLC control module, and the PLC control module controls the loading device 2 to enter the working state;Four first product compressing blocks 17 are distributed at intervals on the left and right above the first upper connecting plate 16. The bottoms of the four first product compressing blocks 17 are respectively fixed on the first upper connecting plate 16. The upper parts of the four first product compressing blocks 17 extend above the material storage platform 9. The blocking block 10 is located above the material storage platform 9 and is fixed on the material storage platform 9. Two first guiding strips 13 are fixed in parallel at intervals on the left and right on the material storage platform 9. The front parts of the two first guiding strips 13 are respectively located on the left and right sides of the blocking block 10. A sound reed plate storage area 23 is formed among the blocking block 10, the two first guiding strips 13 and the four first product compressing blocks 17. The area near the blocking block 10 in the sound reed plate storage area 23 is the loading and grasping position. When the sound reed plate is at the loading and grasping position, it will be blocked by the blocking block 10 and cannot move forward. The first photoelectric sensor 11 is installed on the blocking block 10 and is used to sense whether a sound reed plate reaches the loading and grasping position, and when it senses that a sound reed plate reaches the loading and grasping position, it generates a trigger signal and sends it to the PLC control module.;

[0037] In this embodiment, when frequency modulation is performed on the reed board, first, the automatic frequency modulation system is turned off. Manually arrange a number of reed boards in sequence in the reed board storage area 23. The frontmost reed board is located at the loading and grasping position, close to the blocking block 10, and the rearmost reed board is close to the four first product pressing blocks 17. A number of reed boards are in a relaxed state. Manually press the start button to turn on the automatic frequency modulation system. The first photoelectric sensor 11 senses that there is a reed board and generates a trigger signal to send to the PLC control module. The PLC control module controls the first single-axis servo module 14 to drive the first lower connecting plate 15 to move forward. At this time, the first lower connecting plate 15 drives the second photoelectric sensor 22, two first linear guide rails 20, the first limit block 19, the four first product pressing blocks 17, the first upper connecting plate 16, the first baffle 21, and the first buffer spring 18 to move forward synchronously until the four first product pressing blocks 17 touch the rearmost reed board in the reed board storage area 23. At this time, the four first product pressing blocks 17 are blocked by the reed board and cannot move forward. Since the first upper connecting plate 16 is fixed to the four first product pressing blocks 17 and the first baffle 21 is fixed to the first upper connecting plate 16, the first upper connecting plate 16 and the first baffle 21 cannot move forward either. The first single-axis servo module 14 continues to drive the first lower connecting plate 15 to move forward, and the first lower connecting plate 15 drives the second photoelectric sensor 22, two first linear guide rails 20, and the first limit block 19 to continue to move forward. During this process, the four first product pressing blocks 17 gradually clamp the reed board, and the first buffer spring 18 is compressed by the first limit block 19. When the second photoelectric sensor 22 senses the first baffle 21, a number of reed boards are clamped by the blocking block 10 and the four first product pressing blocks 17. The second photoelectric sensor 22 generates a trigger signal to send to the PLC control module. The PLC control module first controls the first single-axis servo module 14 to stop working, then controls the loading device 2 to suck the reed board located at the loading and grasping position, and then controls the first single-axis servo module 14 to drive the first lower connecting plate 15 to move backward a preset distance. The first lower connecting plate 15 drives the second photoelectric sensor 22, two first linear guide rails 20, the first limit block 19, the four first product pressing blocks 17, the first upper connecting plate 16, the first baffle 21, and the first buffer spring 18 to move backward synchronously, so that the reed board at the loading and grasping position returns from the clamped state to the relaxed state. The PLC control module controls the loading device 2 to move the sucked reed board to the transfer device 3. After a preset delay time, the PLC control module controls the servo module to drive the first lower connecting plate 15 to move forward again, repeating the above actions until the loading device 2 completes the loading of all reed boards.

[0038] Embodiment 3: This embodiment is basically the same as Embodiment 2, with the difference being that: in this embodiment, as shown in FIGS. 3(a) and 3(b), the loading device 2 includes a loading YZ two-axis servo module 24, a loading flipping and sucking mechanism 25, a vacuum generator, and a pressure sensor. This pressure sensor is referred to as the first pressure sensor 26, and this vacuum generator is referred to as the first vacuum generator 27. The loading YZ two-axis servo module 24, the first vacuum generator 27, and the first pressure sensor 26 are all connected to the PLC control module; the first pressure sensor 26 is connected to the first vacuum generator 27 through an air pipe. The loading flipping and sucking mechanism 25 is used to suck the sound spring plate, and the loading YZ two-axis servo module 24 is used to drive the loading flipping and sucking mechanism 25 to move between the loading grasping position and the transfer device 3, suck the sound spring plate at the loading grasping position, and transfer it to the transfer device 3; the loading flipping and sucking mechanism 25 includes a flipping cylinder and two suction cups. This flipping cylinder is referred to as the first flipping cylinder 28, and these two suction cups are referred to as two first suction cups 29. The first flipping cylinder 28 is connected to the PLC control mechanism. The first flipping cylinder 28 is installed on the loading YZ two-axis servo module 24. The two first suction cups 29 are spaced apart and installed on the first flipping cylinder 28. The first flipping cylinder 28 is used to drive the two first suction cups 29 to rotate. Each first suction cup 29 is respectively connected to the first vacuum generator 27 through an air pipe. The first vacuum generator 27 is used to make the two first suction cups 29 generate negative pressure. The first pressure sensor 26 is used to monitor whether the pressure value provided by the first vacuum generator 27 reaches a preset value, and when it monitors that the pressure value provided by the first vacuum generator 27 reaches the preset value, it generates a trigger signal and sends it to the PLC control module.

[0039] In this embodiment, in the initial state, the two first suction cups 29 are in the horizontal direction. When the PLC control module controls the feeding device 2 to enter the working state, the PLC control module first controls the feeding YZ two-axis servo module 24 to drive the feeding turning and sucking mechanism 25 to move to the sound spring board at the feeding grasping position. At this time, the two first suction cups 29 are located on the front side of the sound spring board at the feeding grasping position and are in contact with it. Then, the PLC control module controls the first vacuum generator 27 to start pumping vacuum for the two first suction cups 29, so that the two first suction cups 29 generate negative pressure and suck the sound spring board. After the first pressure sensor 26 detects that the pressure value reaches the preset value, it generates a trigger signal and sends it to the PLC control module. At this time, the PLC control module first controls the feeding YZ two-axis servo module 24 to drive the feeding turning and sucking mechanism 25 to rise by a preset distance, and controls the first turning cylinder 28 to turn 90°, so that the two first suction cups 29 rotate 90° and face downward. At this time, the sound spring board is located below the two first suction cups 29. Then, it controls the feeding YZ two-axis servo module 24 to drive the feeding turning and sucking mechanism 25 to move, and transports the sound spring board sucked by the feeding turning and sucking mechanism 25 to the preset feeding position on the transfer device 3. After a preset delay time, the PLC control module controls the first vacuum generator 27 to stop working. At this time, the suction force of the two first suction cups 29 on the sound spring board disappears, and the sound spring board is supported by the transfer device 3. Then, the PLC control module controls the feeding YZ two-axis servo module 24 and the feeding turning and sucking mechanism 25 to return to the initial position, completing one feeding operation.

[0040] Embodiment 4: This embodiment is basically the same as Embodiment 3, except that: in this embodiment, as shown in FIGS. 4(a) and 4(b), the transfer device 3 includes an X-axis servo module 30 and a sound spring board fixing mechanism 31. The X-axis servo module 30 is connected to the PLC control module. The sound spring board fixing mechanism 31 includes a sound spring board fixing tooling 32, two groups of pneumatic grippers, and an optical fiber sensor 33. Each group of pneumatic grippers includes three pneumatic grippers 34. The six pneumatic grippers 34 and the optical fiber sensor 33 are all connected to the PLC control module. The sound spring board fixing tooling 32 is installed on the X-axis servo module 30 and is used to receive the sound spring board transported by the feeding device 2. The X-axis servo module 30 is used to drive the sound spring board fixing tooling 32 to move linearly. The two groups of pneumatic grippers are respectively installed on both sides of the sound spring board fixing tooling 32 and are symmetrically arranged. An upper feeding position is formed between the two groups of pneumatic grippers. The optical fiber sensor 33 is installed on the sound spring board fixing tooling 32 and is used to detect whether a sound spring board reaches the upper feeding position, and after the sound spring board reaches the upper feeding position, it generates a trigger signal and sends it to the PLC control module.

[0041] In this embodiment, when the feeding device 2 transports the reed board to the feeding position, the fiber optic sensor 33 senses the reed board and generates a trigger signal to send to the PLC control module. The PLC control module first controls the six pneumatic grippers 34 to clamp the reed board to fix it, and then controls the X-axis servo module 30 to drive the reed board fixing tooling 32 to move the reed board so that the first reed piece of the reed board enters the frequency modulation position. Then, the frequency modulation of the reed piece entering the frequency modulation position is carried out. The specific process of the frequency modulation of the reed piece entering the frequency modulation position is as follows: The PLC control module first controls the sounding support device 4 to make the reed piece vibrate and sound. The sound pickup module captures the sounding pitch of the reed piece when it vibrates and sounds and outputs it to the PLC control module. The PLC control module first judges whether the sounding pitch of the reed piece is within the tolerance range of the standard pitch value of the reed piece. If it is within the tolerance range of the standard pitch value of the reed piece, it is considered that the reed piece sounds standard. At this time, the PLC control module controls the X-axis servo module 30 to drive the reed board fixing tooling 32 to move, so that while the reed piece leaves the frequency modulation position, the next reed piece enters the frequency modulation position, and the frequency modulation of the reed piece in the frequency modulation position continues; if it is not within the tolerance range of the standard pitch value of the reed piece, it continues to judge whether the sounding pitch of the reed piece is within the equipment frequency modulation range. If it is within the equipment frequency modulation range, it is considered that the reed piece sounds non-standard. At this time, the PLC control module first controls the sounding support device 4 to support the suspended part of the reed piece, and then controls the grinding device 5 to grind the reed piece once according to the preset grinding amount. After this grinding is completed, the PLC control module first controls the sounding support device 4 to reset and separate from the reed piece, and continues to carry out the frequency modulation of the reed piece in the frequency modulation position; if it is not within the equipment frequency modulation range, it is considered that the reed piece sounds unqualified; when all the reed pieces of the reed board are judged to sound standard or a certain reed piece is judged to sound unqualified, the frequency modulation of the reed board ends. At this time, the PLC control module first controls the X-axis servo module 30 to drive the reed board fixing tooling 32 to move, moves the reed board to the preset cleaning position, and then controls the air blowing and dust suction device to blow and suck the dust of the reed board at the cleaning position. After the air blowing and dust suction device completes the air blowing and dust suction, it first controls the six pneumatic grippers 34 to release the reed board, and then controls the discharging device 6 to transport the qualified reed board to the qualified product discharging position of the qualified product receiving device 7 or transport the unqualified reed board to the unqualified product discharging position of the unqualified product receiving device 8. Finally, it controls the X-axis servo module 30 to drive the reed board fixing tooling 32 to return to the initial position. At this time, the transfer device 3 completes the transfer work of one reed board.

[0042] Embodiment 5: This embodiment is basically the same as Embodiment 4, the difference being that: in this embodiment, as Figure 5As shown in the figure, the pronunciation support device 4 includes a vacuum pump 40, an air chamber 35, an air chamber connection plate 36, a Z-axis servo module 37, a Y-axis servo module 38, and a support rod 39. Both the Z-axis servo module 37 and the Y-axis servo module 38 are connected to the PLC control module. The air chamber connection plate 36 is installed on the Z-axis servo module 37. The Y-axis servo module 38 and the air chamber 35 are respectively installed on the air chamber connection plate 36. The vacuum pump 40 is connected to the air chamber 35 through an air pipe 41. The vacuum pump 40 is used to provide negative pressure to form an air flow inside the air chamber 35. When an air flow is formed inside the air chamber 35, the air chamber 35 can cause the reed piece located above it to vibrate and produce sound. The support rod 39 is installed on the Y-axis servo module 38 and is used to support the suspended part of the reed piece during the grinding process of the grinding device 5. The Y-axis servo module 38 is used to drive the support rod 39 to move back and forth. The Z-axis servo module 37 is used to drive the air chamber connection plate 36, the air chamber 35, the Y-axis servo module 38, and the support rod 39 to move up and down.

[0043] In this embodiment, the sound pickup module includes a microphone and an industrial computer. The microphone is connected to the industrial computer, and the industrial computer is connected to the PLC control module. The microphone is used to collect sound signals and send them to the industrial computer. The industrial computer is used to obtain the pronunciation pitch of the sound signals and send them to the PLC control module.

[0044] In this embodiment, the frequency modulation position is set above the air chamber 35. When a reed piece on the reed board on the transfer device 3 reaches the frequency modulation position, the PLC control system controls the Z-axis servo module 37 to drive the air chamber connection plate 36, the air chamber 35, the Y-axis servo module 38, and the support rod 39 to rise a preset distance, so that the air chamber 35 contacts the reed board fixing tooling 32. At this time, the air flowing inside the air chamber 35 passes through the reed piece at the frequency modulation position, driving it to produce sound. The sound pickup module identifies its pronunciation pitch and sends it to the PLC control system. If the pronunciation of this reed piece is not standard, the PLC control system first controls the Z-axis servo module 37 to drive the air chamber connection plate 36, the air chamber 35, the Y-axis servo module 38, and the support rod 39 to descend and return to the initial state, then controls the Y-axis servo module 38 to drive the support rod 39 to move a preset distance, and then controls the X-axis servo module 30 of the transfer device 3 to drive the reed board fixing tooling 32 to move a preset distance, so that the support rod 39 and the reed piece are in a straight line. Then, it controls the Z-axis servo module 37 to drive the air chamber connection plate 36, the air chamber 35, the Y-axis servo module 38, and the support rod 39 to rise a preset distance, so that the support rod 39 supports the suspended part of this reed piece. Then, it controls the grinding mechanism to perform a grinding operation. After the grinding is completed, the PLC control module controls the Z-axis servo module 37 and the Y-axis servo module 38 to reset; repeat the above operations until all the reed pieces on the reed board in the reed board fixing tooling 32 produce standard pronunciation or the reed board in the reed board fixing tooling 32 is a defective product.

[0045] Example 6: This example is basically the same as Example 1, except that: in this example, as Figure 6 shown, the grinding device 5 includes an XYZ three-axis servo module 42 and an electric grinding head 43. The XYZ three-axis servo module 42 and the electric grinding head 43 are respectively connected to the PLC control module. The electric grinding head 43 is installed on the XYZ three-axis servo module 42. The XYZ three-axis servo module 42 is used to drive the electric grinding head 43 to move forward, backward, left, right, up, and down; the electric grinding head 43 is used for grinding the tone reed plate.

[0046] In this example, when the tone reed plate at the frequency modulation position is judged to have an abnormal pronunciation, the PLC control module first controls the pronunciation support device 4 to support the tone reed plate, then controls the XYZ three-axis servo module 42 to drive the electric grinding head 43 to move to the preset grinding position, and then controls the electric grinding head 43 to rotate and perform grinding processing according to the preset trajectory and depth. After the grinding is completed, the PLC control module controls the electric grinding head 43 to stop rotating, and the XYZ three-axis servo module 42 returns to the initial position to complete one grinding.

[0047] Example 7: This example is basically the same as Example 5, except that: in this example, as Figure 7 shown, the air blowing and dust suction device includes a cylinder 44, a vacuum cleaner 45, two solenoid valves, two air nozzles 46 and a protective cover 47. The two solenoid valves, the vacuum cleaner 45, and the cylinder 44 are all connected to the PLC control module. The two solenoid valves are used to control the two air nozzles 46 to access the external air source one by one; the protective cover 47 is installed on the output rod of the cylinder. The cylinder is used to drive the lifting of the protective cover 47. The protective cover 47 is used to prevent dust from leaking during the air blowing and dust suction process. The air blowing and dust suction device 45 is connected to the protective cover 47 and is used for dust absorption. The air nozzles 46 are installed on both sides of the protective cover 47 and are symmetrically arranged for blowing dust.

[0048] In this example, when the tone reed plate moves to the cleaning position, the PLC control module controls the cylinder 44 to move downwards to make the protective cover 47 cover the tone reed plate fixing tooling 32, and controls the two solenoid valves to conduct, so that the two air nozzles 46 blow the tone reed plate fixing tooling 32, and at the same time controls the vacuum cleaner 45 to perform dust suction on the tone reed plate fixing tooling 32. After a preset time, the PLC control module controls the two solenoid valves to cut off, the vacuum cleaner 45 to stop working, and the cylinder 44 to drive the protective cover 47 to return to the initial position to complete one air blowing and dust suction.

[0049] Example 8: This example is basically the same as Example 1, except that: in this example, as Figure 8(a) and 8(b)As shown, the blanking device 6 includes a blanking YZ two-axis servo module 48, a blanking flipping and sucking mechanism 49, a vacuum generator, and a pressure sensor. This pressure sensor is referred to as the second pressure sensor 50, and this vacuum generator is referred to as the second vacuum generator 51. The blanking YZ two-axis servo module 48, the second vacuum generator 51, and the second pressure sensor 50 are all connected to the PLC control module; the second pressure sensor 50 is connected to the second vacuum generator 51 through an air pipe. The blanking flipping and sucking mechanism 49 is used to suck the sound spring plate. The blanking YZ two-axis servo module 48 is used to drive the blanking flipping and sucking mechanism 49 to move between the blanking position and the qualified product receiving device 7, or between the blanking position and the unqualified product receiving device 8, suck the sound spring plate at the blanking position and transfer it to the qualified product blanking position of the qualified product receiving device 7 or the unqualified product blanking position of the unqualified product receiving device 8; the blanking flipping and sucking mechanism 49 includes a flipping cylinder and two suction cups. This flipping cylinder is referred to as the second flipping cylinder 52, and these two suction cups are referred to as two second suction cups 53; the second flipping cylinder 52 is connected to the PLC control mechanism, the second flipping cylinder 52 is installed on the blanking YZ two-axis servo module 48, the two second suction cups 53 are installed at intervals on the second flipping cylinder 52, and the second flipping cylinder 52 is used to drive the two second suction cups 53 to rotate. Each second suction cup 53 is respectively connected to the second vacuum generator 51 through an air pipe. The second vacuum generator 51 is used to make the two second suction cups 53 generate negative pressure. The second pressure sensor 50 is used to monitor whether the pressure value provided by the second vacuum generator 51 reaches the preset value, and when it monitors that the pressure value provided by the second vacuum generator 51 reaches the preset value, it generates a trigger signal and sends it to the PLC control module.

[0050] In this embodiment, in the initial state, the two second suction cups 53 are in the vertical direction. When the PLC control module controls the blanking device 6 to enter the working state, the PLC control module first controls the blanking YZ two-axis servo module 48 to drive the blanking turning and sucking mechanism 49 to move to the tone spring plate at the blanking position. At this time, the two second suction cups 53 are located above and in contact with the tone spring plate at the blanking position. Then the PLC control module controls the second vacuum generator 51 to start evacuating the two second suction cups 53 to generate negative pressure to suck the tone spring plate. After the second pressure sensor 50 detects that the pressure value reaches the preset value, it generates a trigger signal and sends it to the PLC control module. At this time, the PLC control module first controls the blanking YZ two-axis servo module 48 to drive the blanking turning and sucking mechanism 49 to rise a preset distance, and controls the second turning cylinder 52 to turn 90°, so that the two second suction cups 53 rotate 90° and are in the horizontal direction. At this time, the tone spring plate is located on one side of the two second suction cups 53. If the tone spring plate is a qualified product, the PLC control module controls the blanking YZ two-axis servo module 48 to drive the blanking turning and sucking mechanism 49 to move to the qualified product blanking position of the qualified product receiving device 7. After a preset delay time, the PLC control module controls the second vacuum generator 51 to stop working. At this time, the suction force of the two second suction cups 53 on the tone spring plate disappears, and the tone spring plate is supported by the qualified product receiving device 7. Then the PLC control module controls the blanking YZ two-axis servo module 48 and the blanking turning and sucking mechanism 49 to return to the initial position, completing a qualified product blanking operation. If the tone spring plate is a non-qualified product, the PLC control module controls the blanking YZ two-axis servo module 48 to drive the blanking turning and sucking mechanism 49 to move to the non-qualified product blanking position of the non-qualified product receiving device 8. After a preset delay time, the PLC control module controls the second vacuum generator 51 to stop working. At this time, the suction force of the two second suction cups 53 on the tone spring plate disappears, and the tone spring plate is supported by the non-qualified product receiving device 8. Then the PLC control module controls the blanking YZ two-axis servo module 48 and the blanking turning and sucking mechanism 49 to return to the initial position, completing a non-qualified product blanking operation.

[0051] Embodiment Nine: This embodiment is basically the same as Embodiment One, except that: in this embodiment, as Figure 9(a) , 9(b)As shown in FIGS. 9(c), the qualified product receiving device 7 includes a receiving platform 54, a fixed block 55, a proximity sensor, two guiding bars, two blanking and pushing mechanisms 56, and a blanking feeding mechanism 57. The two guiding bars are referred to as two second guiding bars 58, and the proximity sensor is referred to as a first proximity sensor 59. The first proximity sensor 59 is connected to the PLC control module. The fixed block 55 is located above the receiving platform 54 and is fixed to the receiving platform 54. The blanking feeding mechanism 57 is located below the receiving platform 54. The blanking feeding mechanism 57 includes a second single-axis servo module 60, a second lower connecting plate 61, a second upper connecting plate 62, four second product pressing blocks 63, a second buffer spring 64, a second limiting block 65, two second linear guide rails 66, a second baffle 67, and a photoelectric sensor. The photoelectric sensor is referred to as a third photoelectric sensor 68. Both the second single-axis servo module 60 and the third photoelectric sensor 68 are connected to the PLC control module. The second single-axis servo module 60 is located below the receiving platform 54. The second single-axis servo module 60 is installed on the receiving platform 54. The second lower connecting plate 61 is installed on the second single-axis servo module 60. The second single-axis servo module 60 is used to drive the second lower connecting plate 61 to move back and forth. The two second linear guide rails 66 are distributed at intervals left and right above the second lower connecting plate 61 and are respectively fixed to the second lower connecting plate 61. Each second linear guide rail 66 is provided with a slider that can move back and forth along it. The second upper connecting plate 62 is located above the two second linear guide rails 66 and is fixed to the sliders of the two second linear guide rails 66. The second buffer spring 64 is located behind the second upper connecting plate 62. The front end of the second buffer spring 64 is connected to the second upper connecting plate 62. The second limiting block 65 is located behind the second lower connecting plate 61 and is fixed to the second lower connecting plate 61. The rear end of the second buffer spring 64 is connected to the second limiting block 65. The second baffle 67 is located between the second upper connecting plate 62 and the second lower connecting plate 61 and is fixed to the second upper connecting plate 62. The third photoelectric sensor 68 is installed on the second lower connecting plate 61 and is used to determine whether the tone spring plate at the qualified product blanking position has been removed by sensing the second baffle 67. When the qualified product blanking position is empty, when the third photoelectric sensor 68 senses the second baffle 67, it indicates that the qualified product blanking position is empty. At this time, the third photoelectric sensor 68 generates a trigger signal and sends it to the PLC control module;Four second product pressing blocks 63 are distributed at intervals around the upper second connecting plate 62. The bottoms of the four second product pressing blocks 63 are respectively fixed on the upper second connecting plate 62, and the upper parts of the four second product pressing blocks 63 extend above the material receiving platform 54. Two second guiding bars 58 are fixed in parallel at intervals around the material receiving platform 54. The rear parts of the two second guiding bars 58 are respectively located on the left and right sides of the first proximity sensor 59, and the front parts are respectively located on the left and right sides of the fixing block 55. A qualified product collection area is formed among the fixing block 55, the two second guiding bars 58 and the four second product pressing blocks 63. The qualified product discharging position is near the fixing block 55 in the qualified product collection area. When the first proximity sensor 59 senses the tone spring plate, it indicates that the qualified products in the qualified product collection area are full, and a trigger signal is generated and sent to the PLC control module. Two blanking pushing mechanisms 56 are respectively arranged on the left and right sides of the blanking feeding mechanism 57 and are symmetrically distributed. Each blanking pushing mechanism 56 includes a pushing cylinder 69, a lifting cylinder 70 and a tone spring plate dial block 71. The pushing cylinder 69 is installed on the material receiving platform 54, the lifting cylinder 70 is installed on the output shaft of the pushing cylinder 69. The pushing cylinder 69 is used to drive the lifting cylinder 70 to move back and forth. The tone spring plate dial block 71 is installed on the output shaft of the lifting cylinder 70. The lifting cylinder 70 is used to drive the tone spring plate dial block 71 to move up and down. The tone spring plate dial block 71 can move from below the material receiving platform 54 to above it.;

[0052] In this embodiment, in the initial state, the reed board pusher block 71 extends above the blanking platform 54. After the blanking device 6 places the reed board at the qualified product blanking position of the qualified product receiving device 7, after a preset time, the blanking device 6 resets. The PLC control module first controls the lifting cylinders 70 of the two blanking and pushing mechanisms 56 to drive the lifting cylinders 70 and the reed board pusher block 71 to descend, so that the reed board pusher block 71 descends below the blanking platform 54. Then it controls the pushing cylinders 69 of the two blanking and pushing mechanisms 56 to drive the lifting cylinders 70 and the reed board pusher block 71 to move forward. After that, it controls the lifting cylinders 70 of the two blanking and pushing mechanisms 56 to drive the reed board pusher block 71 to rise to the initial height. Then it controls the pushing cylinders 69 of the two blanking and pushing mechanisms 56 to drive the lifting cylinders 70 and the reed board pusher block 71 to move backward. At this time, the reed board pusher block 71 pushes the qualified products at the qualified product blanking position backward. The qualified products contact the four second product pressing blocks 63, driving the four second product pressing blocks 63, the second upper connecting plate 62, and the second baffle 67 to also move backward. The second buffer spring 64 is compressed until the third photoelectric sensor 68 senses the second baffle 67. The third photoelectric sensor 68 sends a trigger signal to the PLC control module. The PLC control module controls the second single-axis servo module 60 to drive the second lower connecting plate 61 to move backward a preset distance. At this time, the second lower connecting plate 61 drives the third photoelectric sensor 68 and the two second linear guide rails 66 to move backward a preset distance. The PLC control module controls the blanking feeding mechanism 57 to stop moving. At this time, the qualified product blanking position is vacated.

[0053] Embodiment Ten: This embodiment is basically the same as Embodiment One, except that: In this embodiment, as Figure 10 shown, the unqualified product receiving device 8 includes a waste box 72, a sensor bracket 73, a photoelectric sensor, and a proximity sensor. This photoelectric sensor is called the fourth photoelectric sensor 74, and this proximity sensor is called the second proximity sensor 75. Both the fourth photoelectric sensor 74 and the second proximity sensor 75 are connected to the PLC control module. The fourth photoelectric sensor 74 is located above the waste box 72 and is installed on the sensor bracket 73. The second proximity sensor 75 is located below the waste box 72 and is installed on the sensor bracket 73. The unqualified product blanking position is set in the waste box 72.

[0054] In this embodiment, when the blanking device 6 places the unqualified products into the waste box 72, the third photoelectric sensor 68 detects the unqualified products and sends a trigger signal to the PLC control module. The PLC control module starts counting. When the quantity reaches the preset value, the PLC control module issues an alarm message. At this time, it is necessary for the operator to remove the full waste box 72 and put in an empty waste box 72. When the second proximity sensor 75 detects the waste box 72 again, it generates a signal and sends it to the PLC control module. The PLC control module cancels the alarm.

[0055] In summary, the automatic frequency modulation system of the sound reed board of the present invention controls the storage device 1, the feeding device 2, the transfer device 3, the pronunciation support device 4, the sound pickup module, the grinding device 5, the air blowing and dust suction device, the blanking device 6, the qualified product receiving device 7 and the unqualified product receiving device 8 to work together through the PLC control module, realizing the automatic frequency modulation of the sound reed board. Its frequency modulation accuracy does not depend on the professional quality of workers and is not affected by the high or low professional quality of workers. The frequency modulation accuracy can reach ±1 cent, which can ensure the accuracy and stability of the sound emission of the sound reed piece, improve the consistency of the sound reed board, and has low requirements for operators, small labor intensity and high efficiency.

Claims

1. An automatic frequency tuning system for a reed plate, characterized in that The invention comprises a storage device, a feeding device, a transfer device, a sound support device, a sound pickup module, a grinding device, an air blowing and dust suction device, a feeding device, a qualified product receiving device, a unqualified product receiving device and a PLC control module; the PLC control module pre-stores the frequency modulation range of the equipment and the tolerance range of the standard cent value of each reed plate of the reed plate; the storage device is used to store the reed plates to be frequency modulated and push the reed plates to be frequency modulated so that one reed plate is moved to the preset feeding grabbing position at a time; the feeding device is used to transfer the reed plates at the feeding grabbing position to the preset feeding position of the transfer device; the transfer device is used to The reed plate at the moving loading position is used to move the reed pieces on the reed plate to the preset frequency tuning position in sequence, and the frequency tuned reed plate is first transferred to the preset cleaning position, and then transferred from the cleaning position to the preset unloading position; the grinding device is used to grind the reed pieces at the frequency tuning position that are judged to have non-standard pronunciation; the pronunciation support device is used to drive the reed pieces at the frequency tuning position to vibrate and pronounce, and to provide support for the reed pieces during the grinding process of the grinding device; the pickup module is used to capture the pronunciation sound cents of each reed piece at the frequency tuning position when it vibrates and pronounces, and output them to the PLC control module; when the When the PLC control module receives the pronunciation cents of a certain reed piece outputted by the pickup module, it first determines whether the pronunciation cents of the reed piece are within the tolerance range of the standard cent value of the reed piece. If they are within the tolerance range of the standard cent value of the reed piece, it is considered that the pronunciation of the reed piece is standard. If they are not within the tolerance range of the standard cent value of the reed piece, it is further determined whether the pronunciation cents of the reed piece are within the frequency tuning range of the device. If they are within the frequency tuning range of the device, it is considered that the pronunciation of the reed piece is not standard. If they are not within the frequency tuning range of the device, it is considered that the pronunciation of the reed piece is unqualified. When the pronunciation of the reed piece is standard and the reed piece is not a reed plate, When the last reed piece is played, the PLC control module first controls the transfer device to move the reed plate at the location, so that the reed piece leaves the frequency tuning position while the next reed piece enters the frequency tuning position; when the reed piece has a standard pronunciation and the reed piece is the last reed piece of the reed plate, the PLC control module determines the reed plate as a qualified product, the frequency tuning of the reed plate ends, and controls the transfer device to move the reed plate to a preset cleaning position; when the reed piece has an unqualified pronunciation, the PLC control module determines the reed plate as an unqualified product, the frequency tuning of the reed plate ends, and controls the transfer device to move the reed plate to a preset cleaning position;When the pronunciation of the reed piece is not standard, the PLC control module first controls the pronunciation support device to support the suspended part of the reed piece, and then controls the grinding device to grind the reed piece according to the preset grinding amount. After the grinding, the PLC control module first controls the pronunciation support device to reset and separate from the reed piece, and then controls the pronunciation support device to drive the reed piece to vibrate and pronounce again. The pickup module captures the pronunciation sound of the reed piece again and sends it to the PLC control module. The PLC control module makes a judgment again, and the cycle continues until the reed piece pronounces standardly. or the pronunciation is unqualified; the air-blowing and dust-collecting device is used to blow and dust the reed plate in the cleaning position to collect the dust generated by the grinding device grinding the reed plate; the unloading device is used to transport the reed plate that is a qualified product to the qualified product unloading position preset at the qualified product receiving device or to transport the reed plate that is a unqualified product to the unqualified product unloading position preset at the unqualified product receiving device after the air-blowing and dust-collecting device blows and dusts the reed plate in the cleaning position; the qualified product receiving device is used to collect and store qualified products; the unqualified product receiving device is used to collect and store unqualified products; The PLC control module is used to control the storage device, the loading device, the transfer device, the pronunciation support device, the sound pickup module, the grinding device, the air blowing and dust suction device, the unloading device, the qualified product receiving device and the unqualified product receiving device to work in coordination.

2. An automatic frequency tuning system for a reed plate according to claim 1, characterized in that The material storage device includes a material storage platform, a blocking block, a photoelectric sensor, two guide bars and a loading and feeding mechanism, the two guide bars are called two first guide bars, and the photoelectric sensor is called the first photoelectric sensor; the first photoelectric sensor is connected to the PLC control module; the loading and feeding mechanism is located below the material storage platform, and the loading and feeding mechanism includes a first single-axis servo module, a first lower connecting plate, a first upper connecting plate, four first product pressing blocks, a first buffer spring, a first limit block, two first linear guides, a first baffle and a photoelectric sensor, and the photoelectric sensor is called the second photoelectric sensor; the first single-axis servo module and the second photoelectric sensor are both connected to the PLC control module; the first single-axis servo module is located below the material storage platform, the first single-axis servo module is installed on the material storage platform, the first lower connecting plate is installed on the first single-axis servo module, the first single-axis servo module is used to drive the first lower connecting plate to move forward and backward, and the two first linear guides are distributed above the first lower connecting plate at intervals on the left and right, and The first linear guide rails are respectively fixed on the first lower connecting plate, and each first linear guide rail is provided with a slider that can move forward and backward along the first linear guide rails. The first upper connecting plate is located above the two first linear guide rails and is fixed on the sliders of the two first linear guide rails. The first buffer spring is located behind the first upper connecting plate, and the front end of the first buffer spring is connected to the first upper connecting plate. The first limit block is located behind the first lower connecting plate and is fixed on the first lower connecting plate. The rear end of the first buffer spring is connected to the first limit block. The first baffle is located between the first upper connecting plate and the first lower connecting plate and is fixed on the first upper connecting plate. The second photoelectric sensor is installed on the first lower connecting plate, and is used to determine whether the reed plate at the feeding grabbing position is clamped by sensing the first baffle. When the second photoelectric sensor senses the first baffle, it indicates that the reed plate at the feeding grabbing position is clamped. At this time, the second photoelectric sensor generates a trigger signal and sends it to the PLC control module, and the PLC control module controls the feeding device to enter the working state.Four first product pressing blocks are distributed above the first upper connecting plate at intervals on the left and right, the bottoms of the four first product pressing blocks are fixed on the first upper connecting plate respectively, the upper parts of the four first product pressing blocks extend above the material storage platform, the blocking block is located above the material storage platform and fixed on the material storage platform, two first guide bars are fixed on the material storage platform at intervals on the left and right, the front parts of the two first guide bars are located on the left and right sides of the blocking block respectively, a reed plate storage area is formed between the blocking block, the two first guide bars and the four first product pressing blocks, the reed plate storage area near the blocking block is the material loading grabbing position, when the reed plate is located at the material loading grabbing position, it will be blocked by the blocking block and cannot move forward, the first photoelectric sensor is installed on the blocking block, used to sense whether a reed plate has reached the material loading grabbing position, and when sensing that a reed plate has reached the material loading grabbing position, a trigger signal is generated and sent to the PLC control module. ; 3. According to claim 1, an automatic frequency tuning system for a reed plate, characterized in that The feeding device includes a feeding YZ two-axis servo module, a feeding flipping and suction mechanism, a vacuum generator and a pressure sensor. The pressure sensor is called a first pressure sensor, and the vacuum generator is called a first vacuum generator. The feeding YZ two-axis servo module, the first vacuum generator and the first pressure sensor are all connected to the PLC control module; the first pressure sensor is connected to the first vacuum generator through an air pipe, the feeding flipping and suction mechanism is used to suck the reed plate, and the feeding YZ two-axis servo module is used to drive the feeding flipping and suction mechanism to move between the feeding grabbing position and the transfer device, and transfer the reed plate at the feeding grabbing position to the transfer device after sucking it; the feeding flipping and suction mechanism includes a flip The first flip cylinder and the two suction cups are called the first flip cylinder, and the two suction cups are called the two first suction cups. The first flip cylinder is connected to the PLC control mechanism, and the first flip cylinder is installed on the YZ two-axis servo module for feeding. The two first suction cups are installed on the first flip cylinder at intervals. The first flip cylinder is used to drive the two first suction cups to rotate, and each first suction cup is connected to the first vacuum generator through an air pipe. The first vacuum generator is used to generate negative pressure for the two first suction cups. The first pressure sensor is used to monitor whether the pressure value provided by the first vacuum generator reaches a preset value, and when it is monitored that the pressure value provided by the first vacuum generator reaches the preset value, a trigger signal is generated and sent to the PLC control module.

4. The automatic frequency tuning system of a reed plate according to claim 1, characterized in that The transfer device includes an X-axis servo module and a reed plate fixing mechanism, the X-axis servo module is connected to the PLC control module, the reed plate fixing mechanism includes a reed plate fixing tool, two groups of pneumatic clamps and an optical fiber sensor, each group of pneumatic clamps includes three pneumatic clamps, six pneumatic clamps and the optical fiber sensor are connected to the PLC control module, the reed plate fixing tool is installed on the X-axis servo module, and is used to receive the reed plate transported by the feeding device, and the X-axis servo module is used to drive the reed plate fixing tool to move linearly; the two groups of pneumatic clamps are respectively installed on both sides of the reed plate fixing tool, and are symmetrically arranged, and the feeding position is formed between the two groups of pneumatic clamps. The optical fiber sensor is installed on the reed plate fixing tool, and is used to detect whether a reed plate has reached the feeding position, and after the reed plate reaches the feeding position, a trigger signal is generated and sent to the PLC control module.

5. The automatic frequency tuning system of a reed plate according to claim 1, characterized in that The pronunciation support device includes a vacuum pump, an air cavity, an air cavity connecting plate, a Z-axis servo module, a Y-axis servo module and a support rod. The Z-axis servo module and the Y-axis servo module are both connected to the PLC control module. The air cavity connecting plate is installed on the Z-axis servo module. The Y-axis servo module and the air cavity are respectively installed on the air cavity connecting plate. The vacuum pump is connected to the air cavity through an air pipe. The vacuum pump is used to provide negative pressure to form air flow inside the air cavity. When air flow is formed inside the air cavity, the air cavity can make the reed piece located above it vibrate and produce sound. The support rod is installed on the Y-axis servo module and is used for the grinding device to support the suspended part of the reed piece during the grinding process. The Y-axis servo module is used to drive the support rod to move forward and backward. The Z-axis servo module is used to drive the air cavity connecting plate, the air cavity, the Y-axis servo module and the support rod to move up and down.

6. The automatic frequency tuning system of a reed plate according to claim 1, characterized in that The grinding device includes an XYZ three-axis servo module and an electric grinding head. The XYZ three-axis servo module and the electric grinding head are respectively connected to the PLC control module. The electric grinding head is installed on the XYZ three-axis servo module. The XYZ three-axis servo module is used to drive the electric grinding head to move forward, backward, left, right, up and down; the electric grinding head is used for grinding reed pieces.

7. The automatic frequency tuning system of a reed plate according to claim 1, characterized in that The air blowing and dust suction device includes a cylinder, a vacuum cleaner, two solenoid valves, two air nozzles and a protective cover. The two solenoid valves, the vacuum cleaner and the cylinder are all connected to the PLC control module. The two solenoid valves are used to control the two air nozzles to access the external air source in a one-to-one correspondence; the protective cover is installed on the output rod of the cylinder, the cylinder is used to drive the lifting of the protective cover, and the protective cover is used to prevent dust leakage during the air blowing and dust suction process. The air blowing vacuum cleaner is connected to the protective cover for absorbing dust. The air nozzles are installed on both sides of the protective cover and are arranged symmetrically for blowing away dust.

8. The automatic frequency tuning system of a reed plate according to claim 1, characterized in that The unloading device includes a unloading YZ two-axis servo module, a unloading flipping suction mechanism, a vacuum generator and a pressure sensor. The pressure sensor is called a second pressure sensor, and the vacuum generator is called a second vacuum generator. The unloading YZ two-axis servo module, the second vacuum generator and the second pressure sensor are all connected to the PLC control module; the second pressure sensor is connected to the second vacuum generator through an air pipe, the unloading flipping suction mechanism is used to suck the reed plate, and the unloading YZ two-axis servo module is used to drive the unloading flipping suction mechanism to move between the unloading position and the qualified product receiving device, or between the unloading position and the unqualified product receiving device, and transfer the reed plate at the unloading position to the qualified product unloading position of the qualified product receiving device or the unqualified product receiving device after sucking it. The unqualified products are unloaded at the device; the unloading flipping and suction mechanism includes a flip cylinder and two suction cups, the flip cylinder is called the second flip cylinder, and the two suction cups are called two second suction cups; the second flip cylinder is connected to the PLC control mechanism, the second flip cylinder is installed on the unloading YZ two-axis servo module, and the two second suction cups are installed on the second flip cylinder at intervals, the second flip cylinder is used to drive the two second suction cups to rotate, each second suction cup is connected to the second vacuum generator through an air pipe, the second vacuum generator is used to make the two second suction cups generate negative pressure, and the second pressure sensor is used to monitor whether the pressure value provided by the second vacuum generator reaches a preset value, and when it is monitored that the pressure value provided by the second vacuum generator reaches the preset value, a trigger signal is generated and sent to the PLC control module.

9. The automatic frequency tuning system of a reed plate according to claim 1, characterized in that The qualified product receiving device includes a receiving platform, a fixed block, a proximity sensor, two guide bars, two material feeding mechanisms and a material feeding mechanism, the two guide bars are called two second guide bars, the proximity sensor is called a first proximity sensor, and the first proximity sensor is connected to the PLC control module; the fixed block is located above the receiving platform and fixed on the receiving platform, the material feeding mechanism is located below the receiving platform, the material feeding mechanism includes a second single-axis servo module, a second lower connecting plate, a second upper connecting plate, four second product pressing blocks, a second buffer spring, a second limit block, two second linear guides, a second baffle and a photoelectric sensor, the photoelectric sensor is called a third photoelectric sensor; the second single-axis servo module and the third photoelectric sensor are both connected to the PLC control module; the second single-axis servo module is located below the receiving platform, the second single-axis servo module is installed on the receiving platform, the second lower connecting plate is installed on the second single-axis servo module, and the second single-axis servo module is used to drive the second lower connecting plate Move forward and backward, two second linear guides are spaced apart on the left and right sides above the second lower connecting plate, and are respectively fixed on the second lower connecting plate, each second linear guide is provided with a slider that can move forward and backward along it, the second upper connecting plate is located above the two second linear guides, and is fixed on the sliders of the two second linear guides; the second buffer spring is located behind the second upper connecting plate, and the front end of the second buffer spring is connected to the second upper connecting plate; the second limit block is located behind the second lower connecting plate and is fixed on the second lower connecting plate; the rear end of the second buffer spring is connected to the second limit block; the second baffle is located between the second upper connecting plate and the second lower connecting plate, and is fixed on the second upper connecting plate; the third photoelectric sensor is installed on the second lower connecting plate, and is used to judge whether the reed plate at the qualified product unloading position is removed by sensing the second baffle, and the qualified product unloading position is vacant. When the third photoelectric sensor senses the second baffle, it indicates that the qualified product unloading position is vacant, and at this time, the third photoelectric sensor generates a trigger signal and sends it to the PLC control module;Four second product pressing blocks are distributed above the second upper connecting plate at intervals on the left and right, the bottoms of the four second product pressing blocks are fixed on the second upper connecting plate respectively, the upper parts of the four second product pressing blocks extend above the material receiving platform, two second guide bars are fixed on the material receiving platform at intervals on the left and right, the rear parts of the two second guide bars are respectively located on the left and right sides of the first proximity sensor, and the front parts are respectively located on the left and right sides of the fixed block, a qualified product collection area is formed between the fixed block, the two second guide bars and the four second product pressing blocks, the qualified product collection area is close to the fixed block as the qualified product unloading position, and when the first proximity sensor senses the reed plate, it indicates that the qualified product When the collection area is full of qualified products, a trigger signal is generated and sent to the PLC control module; two material feeding mechanisms are respectively arranged on the left and right sides of the material feeding mechanism, and are symmetrically distributed. Each material feeding mechanism includes a material pushing cylinder, a lifting cylinder and a reed plate block. The material pushing cylinder is installed on the material receiving platform, and the lifting cylinder is installed on the output shaft of the material pushing cylinder. The material pushing cylinder is used to drive the lifting cylinder to move forward and backward. The reed plate block is installed on the output shaft of the lifting cylinder. The lifting cylinder is used to drive the reed plate block to move up and down. The reed plate block can move from below the material receiving platform to above it. ; 10. The automatic frequency tuning system of a reed plate according to claim 1, characterized in that The defective product receiving device includes a waste box, a sensor bracket, a photoelectric sensor, and a proximity sensor. The photoelectric sensor is called the fourth photoelectric sensor, and the proximity sensor is called the second proximity sensor. The fourth photoelectric sensor and the second proximity sensor are both connected to the PLC control module. The fourth photoelectric sensor is located above the waste box and is installed on the sensor bracket. The second proximity sensor is located below the waste box and is installed on the sensor bracket. The defective product unloading position is set in the waste box.

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