CN109493833B

CN109493833B - Automatic woolen yarn machine of wearing of piano pedestal

Info

Publication number: CN109493833B
Application number: CN201811232341.6A
Authority: CN
Inventors: 张开峰; 岑迪锋; 胡央丹; 胡建迪; 罗迪
Original assignee: Ningbo Luo Music Corp
Current assignee: Ningbo Luo Music Corp
Priority date: 2018-10-22
Filing date: 2018-10-22
Publication date: 2021-09-07
Anticipated expiration: 2038-10-22
Also published as: CN109493833A

Abstract

The invention discloses an automatic tweezing machine for a piano shaft bracket, which solves the problems of low production efficiency and low automation degree of a tweezing process for the piano shaft bracket at the present stage. Its technical scheme main points are automatic wearing machine of piano pedestal, including wearing the platform and wearing the device, wear the platform and have and wear the woollen station, wear the device including supplying band mechanism, clitellum module, cutting band mechanism and wearing band mechanism, supply band mechanism to carry the woollen area for the clitellum module, cut band mechanism and cut off the woollen area and make and form the bush woollen in the clitellum module, clitellum module cunning moves to one side of wearing the woollen station, wear the band mechanism with the bush woollen top go into wear the lining woollen hole of piano pedestal on the woollen station, realize the process of wearing the woollen to the piano pedestal, the automatic wearing machine degree of piano pedestal is higher, has reduced staff's intensity of labour, has promoted the efficiency of wearing the woollen of piano pedestal.

Description

Automatic woolen yarn machine of wearing of piano pedestal

Technical Field

The invention relates to the technical field of manufacturing of piano parts, in particular to an automatic nylon thread putting-in machine for a piano shaft bracket.

Background

The piano shaft bracket is a core part of the upright piano, is a key part for connecting each lever in the action machine and directly influences whether the action of the action machine part is smooth or not. Referring to fig. 18, a piano shaft bracket 9 includes a shaft bracket body 91, where the left and right sides of the shaft bracket body 91 are symmetrically provided with bushing holes 92 and bushing materials 93 installed in the bushing holes 92, and the bushing materials 93 are formed with shaft holes for installing rotating shafts.

The existing tweezing procedure is to manually insert the bushing tweezing 93 into the bushing hole 92 of the piano pedestal 9, and the tweezing operation needs certain proficiency of operators, and has lower automation degree and low production efficiency, so that the automatic tweezing machine for the piano pedestal with high production efficiency and higher automation degree needs to be developed.

Disclosure of Invention

The invention aims to provide an automatic tweezer for a piano shaft bracket, which has high automation degree and high production efficiency.

The technical purpose of the invention is realized by the following technical scheme:

an automatic tweezer for a piano shaft bracket is characterized by comprising a tweezing platform and two tweezing devices symmetrically arranged at two sides of the tweezing platform; the tweezing platform is provided with a tweezing station for placing a piano shaft bracket;

the tweezing device comprises a belt supply mechanism, an endless belt module, a belt cutting mechanism and a tweezing mechanism, wherein the belt supply mechanism is transversely staggered with the tweezing station, the endless belt module transversely slides between the belt supply mechanism and the tweezing station, the belt cutting mechanism is positioned on one side of the belt supply mechanism, and the belt threading mechanism is positioned on one side of the tweezing station;

the belt supply mechanism comprises a belt supply platform for placing a woolen belt, a belt pressing mechanism which is arranged on the belt supply platform and used for pressing the woolen belt, and a belt supply cylinder for controlling the longitudinal sliding of the belt supply platform;

the ring belt module comprises a sliding platform, a clamping mould arranged on the sliding platform, a first driving assembly for controlling the mould opening/closing of the clamping mould and a sliding cylinder for driving the sliding platform to slide transversely, wherein the clamping mould is provided with a clamping through hole for placing the shaft bushing;

the belt cutting mechanism comprises a belt cutting blade and a belt cutting cylinder for driving the belt cutting blade to vertically slide;

the belt threading mechanism is located on one side of the woolen cloth threading station and comprises a woolen cloth threading thimble opposite to a woolen cloth threading hole of the shaft frame on the woolen cloth threading station and a woolen cloth threading cylinder for driving the woolen cloth threading thimble to longitudinally slide.

By adopting the technical scheme, the step of the automatic tweezing machine for the piano shaft bracket is as follows: 1. the girdle module moves to one side of the belt supply mechanism under the action of the sliding cylinder, and at the moment, a clamping mould in the girdle module is in an open state; 2. the belt supply platform slides towards the clamping mould under the action of the belt supply cylinder, so that the belts at the end part of the belt supply platform are inserted into the clamping mould; 3. the clamping die is matched under the action of the first driving assembly, and the end part of the woolen belt is clamped; 4. the belt supply platform resets under the action of the belt supply cylinder, and the end part of the belt is clamped by the clamping die, so that the belt is pulled out, and the length of the belt inserted into the clamping die next time is ensured; 5. the belt cutting mechanism operates, the belt cutting cylinder drives the belt cutting blade to descend, the end part of the woolen belt is cut off and reset, and at the moment, bushing woolen cloth is formed in the clamping through hole of the clamping die; 6. the clamping die moves to one side of the tweezing station under the action of the sliding cylinder, and the clamping through hole is opposite to a tweezing hole of a piano shaft bracket on the tweezing station; 7. the tweezing cylinder drives the tweezing thimble to eject out, and the bushing tweezer in the clamping through hole is ejected into the bushing hole of the piano shaft bracket.

Above-mentioned automatic machine of wearing of piano pedestal has realized that the degree of automation of wearing the process is higher, only need place the piano pedestal and can be in order to realize automatic wearing the process on work platform's the wearing woollen station. Compared with the traditional manual tweezing mode, the automatic tweezing machine for the piano shaft bracket disclosed by the invention has higher tweezing efficiency.

As a further improvement of the invention, the clamping mold comprises a left mold and a right mold, the first driving assembly comprises a left air cylinder for controlling the left mold to slide transversely and a right air cylinder for controlling the right mold to slide transversely, a positioning column is arranged at the top of the sliding platform, and positioning grooves matched with the positioning column are symmetrically arranged on the left mold and the right mold; and the top of the pressing die is provided with a cutting groove for the belt cutting blade to extend into.

By adopting the technical scheme, the left cylinder controls the left die to slide, and the right cylinder drives the right die to slide, so that the die opening/closing of the clamping die is realized. Meanwhile, the positioning column and the positioning groove are matched with each other, so that the mold closing precision of the clamping mold is improved; the setting of cutting off the groove for the end of cutting off the ribbon in the clamping die of cutting off the tape cutter piece helps the tape cutter piece to cut off the end of ribbon, and the promotion is kept in the axle bush woolen cloth shape in the clamping through-hole after cutting off complete.

As a further improvement of the invention, the belt pressing mechanism comprises a belt pressing bracket, a belt pressing plate and a rotary torsion spring, wherein the belt pressing plate is rotatably arranged on the belt pressing bracket, the belt pressing bracket is provided with a belt pressing base for placing the end part of the belt at one end close to the belt ring module, the rotary torsion spring drives the belt pressing plate to have the tendency of pressing the belt on the supporting base at first and last, and the top of the belt pressing base is provided with a forming arc groove which is concave downwards and through which the belt passes.

Through adopting above-mentioned technical scheme, the cooperation of rotatory torsional spring and pinch plate on the above-mentioned pinch mechanism can make the tip of woollen band compress tightly on pressing the belt base all the time. Simultaneously, because press the setting of taking the shaping arc groove on the base for the ribbon end forms an cambered surface, has helped whole ribbon end to form the ring form when the clamping die presss from both sides tightly, and above-mentioned structure has promoted the shaping quality of bushing.

As a further improvement of the invention, a forming cylinder for driving the belt pressing mechanism to longitudinally slide is also arranged on the belt supplying platform.

Through adopting above-mentioned technical scheme, when moving cylinder shifts clamping die to supplying and takes mechanism one side, supply to take the cylinder to take platform, hold-down mechanism and the woolen cloth area to move towards the mould direction that compresses tightly, then, the setting up of shaping cylinder can further push belt pressing mechanism and woolen cloth area to the mould that compresses tightly, helps the tip of woolen cloth area to keep the arc to stretch into between the mould that compresses tightly, has promoted the shaping rate of bushing woolen cloth and the shaping quality of bushing woolen cloth.

As a further improvement of the invention, the tweezing platform is a working slideway for sliding of the piano shaft bracket, and the working slideway is provided with tweezing through holes opposite to the tweezing holes of the piano shaft bracket on the tweezing station at two sides of the tweezing station; the automatic tweezing machine for the piano shaft bracket further comprises a feeding device, a pushing device and a pressing device; the feeding device comprises a vibrating disk and a feeding slideway for conveying the piano shaft bracket in the vibrating disk to the working slideway; the pushing assembly comprises a pushing rod and a driving assembly for driving the pushing rod to push the piano shaft frame to the tweezing station; the material pressing device can be pushed to the piano shaft bracket on the nylon wearing station by the pushing assembly to be compressed.

Through adopting above-mentioned technical scheme, material feeding unit, pusher and press device have further promoted the degree of automation of the automatic worsted machine of piano pedestal. The feeding device consisting of the vibrating disk and the feeding slideway can feed the piano shaft bracket to the working slideway; drive assembly releases the ejector pin in the propelling movement subassembly, pushes away the piano pedestal to wearing on the woollen station to compress tightly fixedly the piano pedestal through press device, reduced and worn out the probability that the in-process piano pedestal takes place to deviate.

As a further improvement of the invention, the working slideway is further provided with a glue injection station for placing the piano shaft frame between the feeding slideway and the nylon insertion station, the working slideway is provided with glue injection through holes at two sides of the glue injection station, which are opposite to the nylon lining holes of the piano shaft frame on the glue injection station, the automatic nylon insertion machine for the piano shaft frame is symmetrically provided with glue injection devices and glue supply devices for supplying glue to the glue injection devices at two sides of the glue injection station, and the driving devices can drive the driving rods to push the piano shaft frame to the glue injection station.

Through adopting above-mentioned technical scheme, set up the injecting glue station on the work slide to set the injecting glue device in the both sides of injecting glue station, can realize injecting the one deck in advance and glue in the lining woolen cloth hole of piano pedestal, will annotate again and glue the piano pedestal that glues and carry out the injecting glue, can increase the fixed strength of lining woolen cloth in the lining woolen cloth hole in the piano pedestal after the process of wearing, reduced the probability that lining woolen cloth drops from lining the woolen cloth hole. Meanwhile, the structure can realize the automation of the functions.

As a further improvement of the invention, the glue injection device comprises a glue injection bracket, a glue injection outer pipe arranged on the glue injection bracket, a glue injection inner pipe which is slidably arranged on the glue injection outer pipe and connected with the glue supply device, a first glue injection cylinder for driving the glue injection bracket to longitudinally slide, and a second glue injection cylinder for driving the glue injection inner pipe to longitudinally slide in the glue injection outer pipe, wherein the glue injection inner pipe is provided with a glue injection needle pipe inserted into the glue injection through hole.

Through adopting above-mentioned technical scheme, the injecting glue function of injecting glue device can be realized to above-mentioned structure, and the injecting glue process of above-mentioned injecting glue device is as follows: 1. the first glue injection cylinder drives the glue injection support to slide towards the direction of the working slideway; 2. the second glue injection cylinder drives the glue injection inner pipe to further slide towards the direction of the working slideway, so that the glue injection needle pipe penetrates through the glue injection through hole and is inserted into the lining hole of the piano shaft bracket; 3. and resetting after the glue injection process is finished. Compared with other modes of directly driving the glue injection needle tube by one air cylinder, the glue injection device adopted by the invention has a compact structure and is not easy to interfere with other parts of the automatic tweezer of the piano shaft bracket.

As a further improvement of the invention, the glue injection support is provided with a glue cutting mechanism for cutting off residual glue at the end part of the glue injection needle tube, the glue cutting mechanism comprises a glue cutting support arranged on the glue injection support, a glue cutting air cylinder arranged on the glue cutting support and a glue cutting blade driven by the glue cutting air cylinder and vertically translating, and the glue cutting support is also provided with a residual glue groove corresponding to the glue cutting blade and allowing the residual glue to fall off.

Through adopting above-mentioned technical scheme, the setting of surely gluing the framework can be with the surplus of injecting glue needle tubing tip amputate, and it is unusual to prevent that there is the injecting glue device injecting glue that the surplus of sclerosis caused in the tip of injecting glue needle tubing, consequently cuts the mucilage binding device and can help improving the injecting glue stability of injecting glue device to a certain extent, helps guaranteeing to be injected into the glue quality in the lining woolen cloth hole of piano pedestal.

As a further improvement of the present invention, the glue supply device includes a glue supply gun and a glue outlet control valve, the glue supply gun includes a gun barrel and a glue supply piston hermetically slidably mounted in the gun barrel, an air inlet head and a glue outlet head are respectively disposed at two ends of the gun barrel, the glue outlet control valve is a two-way control valve, an air inlet of the gun barrel is connected with an air supply system, the glue outlet head of the gun barrel is connected with an inlet of the glue outlet control valve, and an outlet of the glue outlet control valve is connected with the glue injection device.

Through adopting above-mentioned technical scheme, because the air inlet of barrel links to each other with the air supply system of mill always for supply to glue the rifle and have all the time with the glue of inside from its pressure that goes out the first extrusion of gluing, through go out glue overhead setting up out glue control valve and be used for controlling supply to glue rifle and injecting glue device and switch on.

In conclusion, the invention has the following beneficial effects:

1. the automatic tweezer for the piano shaft bracket is provided with a tweezing platform with a tweezing station and a tweezing device, wherein the tweezing device comprises a lendering mechanism, an annular belt module, a belt cutting mechanism and a belt threading mechanism, so that the automatic tweezer for the piano shaft bracket has higher automation degree and more ideal processing efficiency;

2. the clamping die comprises a left die and a right die, a left air cylinder and a right air cylinder are respectively arranged to drive the die opening and die closing of the left die and the right die, and a belt pressing base with a forming arc groove of the belt pressing mechanism is combined to facilitate the ring formation of the end part of the belt and improve the forming quality of the bushing woolen cloth penetrating into the bushing hole of the piano shaft bracket;

3. by arranging the feeding device, the pushing device and the pressing device, the automation degree of the whole piano shaft frame automatic tweeng machine is further improved, and the processing efficiency is improved;

4. the injecting glue process has been added before wearing the woollen process to adopt the setting of injecting glue device and confession mucilage binding to put, realized the automated production of injecting glue process, promoted the joint strength between bushing woollen and the piano pedestal body in the piano pedestal, reduced the probability that bushing woollen drops from the piano pedestal body.

Drawings

FIG. 1 is a schematic structural diagram of an automatic tweezer for a piano shaft bracket;

FIG. 2 is a schematic structural diagram of a feeding device, a tweezing device, a pressing device, a glue injection device, a pushing device and a discharging device on one side of a working slideway;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is an enlarged view at B in FIG. 2;

FIG. 5 is an enlarged view at C of FIG. 2;

FIG. 6 is an enlarged view taken at D in FIG. 2;

FIG. 7 is a schematic structural view of a pressing device;

FIG. 8 is a schematic structural view of a console, a glue supply device and a glue injection device;

FIG. 9 is a schematic structural view of the glue injection apparatus;

FIG. 10 is an exploded view of the inner and outer plastic injection tubes;

FIG. 11 is a schematic view of a glue gun;

FIG. 12 is a schematic view of a structure of a tape supply mechanism;

FIG. 13 is a schematic view of a press belt construction and a forming cylinder;

FIG. 14 is a schematic structural view of the cuff module;

FIG. 15 is a schematic view of a clamping die;

FIG. 16 is a schematic structural view of a tape cutting mechanism;

FIG. 17 is a schematic structural view of a threading mechanism;

fig. 18 is a schematic structural view of a piano boss.

In the figure: 1. a work table; 11. a console; 21. rotating the feeding table; 22. a feeding chute; 3. a working slideway; 31. a feed station; 32. a glue injection station; 321. injecting glue through holes; 33. a woolen cloth threading station; 331. a woolen cloth penetrating through hole; 34. a discharging section; 35. a feed opening; 4. a tweezing device; 41. a tape supply mechanism; 411. a tape supply platform; 412. a belt pressing mechanism; 412a, a pinch belt holder; 412b, a pinch plate; 412c, a rotating torsion spring; 412d, a push belt base; 412d1, shaped arc groove; 413. a forming cylinder; 414. a belt supply cylinder; 42. an endless belt module; 421. a sliding platform; 421a, a positioning column; 422. clamping the mold; 422a and a left die; 422b and a right mould; 422c, clamping through holes; 422d, cutting off the groove; 423. a slipping cylinder; 424a, left cylinder; 424b, right cylinder; 43. a belt cutting mechanism; 431. cutting a belt bracket; 432. a belt cutting cylinder; 433. a blade holder; 434. a tape cutting blade; 44. a threading mechanism; 441. a tweezing cylinder; 442. threading a thimble; 5. a pushing device; 51. pushing the slide rail; 52. pushing the sliding block; 53. a first push cylinder; 54. a second push cylinder; 55. a material pushing rod; 6. a pressing device; 61. a material pressing bracket; 62. a material pressing cylinder; 71. a glue injection device; 711. a glue injection bracket; 712. injecting an outer tube; 712a, a first via; 713. injecting an inner tube; 713a, injecting glue needle tubing; 713a1, glue outlet; 713b, glue injection joint; 714. a first glue injection cylinder; 715. a second glue injection cylinder; 716. injecting glue and pushing blocks; 72. a glue supply device; 721. a glue supplying gun; 721a, barrel; 721b, a glue supply piston; 721c, an intake head; 721d, a glue outlet head; 722. a glue outlet control valve; 73. a glue cutting mechanism; 731. cutting a rubber support; 732. a rubber cutting cylinder; 733. a rubber cutting blade; 734. a residual glue groove; 8. a discharging device; 81. a discharge chute; 811. a discharge station; 82. a discharging cylinder; 9. a piano pedestal; 91. a pedestal body; 92. lining wool holes; 93. bushing.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Participate in fig. 1 and fig. 2, an automatic tweezer of piano pedestal, including workstation 1, material feeding unit, install the platform of wearing on workstation 1, symmetrically set up in wearing and woolen platform both sides and wear woolen device 4, pusher 5, press device 6, injecting glue device 71, supply mucilage binding device 72, discharging device 8 and control cabinet 11.

Participate in fig. 3 to fig. 6, the tweezing platform is a working slideway 3, the width of the working slideway 3 is 2 mm-3 mm greater than that of the piano shaft bracket 9 (refer to fig. 18), so that the sliding of the piano shaft bracket 9 on the working slideway 3 is stable, and a feeding station 31, a glue injection station 32, a tweezing station 33 and a discharging section 34 behind the tweezing station 33 are sequentially arranged along the sliding direction of the piano shaft bracket 9 for placing the piano shaft bracket 9.

The working slide 3 is arranged transversely, and glue injection through holes 321 are symmetrically formed in the working slide 3 on two sides of the glue injection station 32; the two sides of the tweezing station 33 are symmetrically provided with tweezing through holes 331. When the piano shaft frame 9 is positioned at the glue injection station 32/tweezing station 33, the lining holes 92 of the piano shaft frame 9 are opposite to the glue injection through holes 321/tweezing through holes 331.

Referring to fig. 1, 2 and 3, the feeding device comprises a rotary feeding table 21 and a feeding chute 22 connecting the rotary feeding table 21 and the working chute 3. Wherein, the junction of the feeding slideway 22 and the working slideway 3 is provided with a feeding opening 35, and the feeding opening 35 is positioned at one side of the feeding station 31.

The pushing device 5 comprises a pushing slide rail 51, a pushing slide block 52 adapted to the pushing slide rail 51, a first pushing cylinder 53 for sliding the pushing slide block 52 on the pushing slide rail 51, a second pushing cylinder 54 mounted on the pushing slide block 52, and a pushing rod 55 mounted on a piston rod of the second pushing cylinder 54. Wherein, the ejector beam 55 is square rod and width and work slide 3 looks adaptation, and after the ejector beam 55 was ejecting, can seal the feed opening 35 of work slide rail.

Wherein, the work slide rail is horizontal setting, and pusher 5 promotes piano pedestal 9 (refer to fig. 18) to injecting glue station 32 from feeding station 31, and the step of promoting to wearing out station 33 from injecting glue station 32 again is as follows: firstly, the first pushing cylinder 53 and the second pushing cylinder 54 are both in a contraction state, and the front end of the pushing rod 55 is abutted against the tail part of the piano shaft bracket 9 on the feeding station 31; secondly, the first pushing cylinder 53 drives the pushing slide block 52 to slide towards the direction of the working slide way 3, and simultaneously drives the piano shaft bracket 9 to be transferred from the feeding station 31 to the glue injection station 32; after the piano shaft frame 9 finishes the glue injection process, a piston rod of a second pushing cylinder extends out, and the piano shaft frame 9 is pushed to a tweezing station 33 from the glue injection station 32; waiting for the piano pedestal 9 to be pushed to the tweezing station 33, and ejecting the piano pedestal 9 originally on the tweezing station 33 out of the tweezing station 33, the first push cylinder and the second push cylinder reset.

Referring to fig. 7, the pressing device 6 includes a pressing bracket 61 and a pressing cylinder 62 mounted on the pressing bracket 61, the pressing cylinder 62 is vertically disposed, and the ejection direction of the piston rod is vertically downward. The working slide 3 is provided with a pressing device 6 on the glue injection station 32 (see the attached drawing 4) and the tweezing station 33 (see the attached drawing 5), and the pressing device 6 can press the piano shaft frame 9 on the glue injection station 32/tweezing station 33, so that the deviation of the piano shaft frame 9 in the glue injection/tweezing process is reduced.

Referring to fig. 1 and 2, the automatic lining machine for piano shaft frames comprises two glue injection devices 71 and glue supply devices 72 which are matched with the glue injection devices 71 one by one. Wherein, two injecting glue devices 71 are symmetrically arranged at two sides of the injecting glue station 32 in the working slideway 3.

Referring to fig. 8, 9 and 10, the glue injection device 71 includes a glue injection bracket 711, a glue injection outer tube 712 mounted on the glue injection bracket 711, a glue injection inner tube 713 slidably mounted on the glue injection outer tube 712, a first glue injection cylinder 714 driving the glue injection bracket 711 to slide longitudinally, and a second glue injection cylinder 715 driving the glue injection inner tube 713 to slide longitudinally.

The top of the glue injection support 711 is slidably provided with a glue injection push block 716 capable of sliding transversely, one end of the glue injection inner pipe 713, which is far away from the glue injection station 32, extends out of the glue injection outer pipe 712 and is fixed on the glue injection push block 716, and a piston rod of the second glue injection cylinder 715 is connected and fixed with the glue injection push block 716, so that the second glue injection cylinder 715 pushes the glue injection inner pipe 713.

One end of the glue injection outer pipe 712 facing the glue injection station 32 is provided with a first through hole 712a with a smaller aperture than the glue injection inner pipe 713. One end of the glue injection inner pipe 713, which faces the glue injection station 32, is provided with a glue injection needle tube 713a which can sequentially penetrate through the first through hole 712a of the glue injection outer pipe 712 and the glue injection through hole 321 of the working slide way 3, and the end part of the glue injection needle tube is uniformly provided with a plurality of glue outlet holes 713a1 in the circumferential direction; the other end of the glue injection inner tube 713 is fixed on the glue injection pushing block 716, and is provided with a glue injection joint 713b communicated with the glue supply device 72.

The glue injection bracket 711 is provided with a glue cutting mechanism 73 for cutting off the residual glue at the end part of the glue injection needle tube. The glue cutting mechanism 73 comprises a glue cutting bracket 731 arranged on the glue injection bracket 711, a glue cutting cylinder 732 arranged on the glue cutting bracket 731, and a glue cutting blade 733 driven by the glue cutting cylinder 732 and vertically translated. The glue cutting bracket 731 is further provided with a glue residue groove 734 corresponding to the glue cutting blade 733 and allowing glue residue to fall. The arrangement of the glue cutting mechanism 73 can prevent the end of the glue injection needle tube 713a from forming residual glue, and is beneficial to ensuring the normal glue injection next time.

Referring to fig. 8 and 11, the glue supply device 72 mainly includes a glue supply gun 721 and a glue discharge control valve 722. The glue supplying gun 721 comprises a barrel 721a and a glue supplying piston 721b hermetically and slidably mounted in the barrel 721a, wherein an air inlet 721c and a glue outlet 721d are respectively disposed at two ends of the barrel 721 a. Wherein, the glue outlet control valve 722 is an electric control two-way control valve. The air inlet of the gun tube 721a is communicated with an air supply system of a factory, the glue outlet head 721d of the gun tube 721a is connected with the inlet of the glue outlet control valve 722, the outlet of the glue outlet control valve 722 is communicated with the glue injection connector 713b of the glue injection inner tube 713, and the control end of the glue outlet control valve 722 is connected with the console 11 and controlled by the console 11.

The working steps of the glue injection device 71 and the glue supply device 72 are as follows: the glue injection control valve is in a closed state in a normal state, so that the inlet and the outlet of the glue outlet control valve 722 are not communicated, and the glue outlet inner pipe has no glue outlet pressure; when glue needs to be injected, the first glue injection cylinder 714 drives the glue injection support 711 to slide towards the working slideway 3, the second glue injection cylinder 715 drives the glue injection inner pipe 713 to slide towards the working slideway 3, and the glue injection needle pipes penetrate through the glue injection through holes 321 of the working slideway 3 and are inserted into the lining holes 92 of the piano shaft frame 9, at the moment, the console 11 controls the glue outlet control valve 722 to be opened, the pressure in the glue injection gun is transmitted to the glue injection inner pipe 713, so that the pressure of the glue injection inner pipe 713 is increased, and glue is extruded from the glue injection needle pipes and attached to the inner wall of the lining holes 92 of the piano shaft frame 9; finally, the console 11 controls the glue outlet control valve 722 to close, the first glue injection cylinder 714 and the second glue injection cylinder 715 are reset, and the glue cutting mechanism 73 operates to cut off the residual glue at the end of the glue injection needle tube.

Referring to fig. 2, the tweezing device 4 includes a tape supply mechanism 41, an endless belt module 42, a tape cutting mechanism 43, and a tape threading mechanism 44.

Referring to fig. 12, the tape supply mechanism 41 is located laterally offset from the donning station 33 (see fig. 5) and on a side adjacent to the glue injection device 71 (see fig. 2). The belt supplying mechanism 41 includes a belt supplying platform 411 for placing the belts, a belt pressing mechanism 412 installed on the belt supplying platform 411 and pressing the belts, a forming cylinder 413 for driving the belt pressing mechanism 412 to longitudinally slide, and a belt supplying cylinder 414 for controlling the belt supplying platform 411 to longitudinally slide.

Referring to fig. 13, the belt pressing mechanism 412 includes a belt pressing bracket 412a, a belt pressing plate 412b rotatably mounted on the belt pressing bracket 412a, and a rotating torsion spring 412c, the belt pressing bracket 412a is further provided with a belt pressing base 412d at a side close to the working chute 3, and the rotating torsion spring 412c drives the belt pressing plate 412b to have a tendency to press the belt against the belt pressing base 412d at all times. The top of the pressing belt base 412d is provided with a downward-concave forming arc groove 412d1 for the belt to pass through, and the forming arc groove 412d1 enables the end of the belt to be arc-shaped, which facilitates the later forming of the annular bushing 93 (see fig. 18).

Referring to fig. 14 and 15, the endless belt module 42 includes a sliding platform 421, a clamping mold 422 mounted on the sliding platform 421, a first driving assembly for controlling opening/closing of the clamping mold 422, and a sliding cylinder 423 for driving the sliding platform 421 to slide laterally. The clamping die 422 includes a left die 422a and a right die 422b having arc grooves on opposite end surfaces thereof, and when the dies are closed, the two arc grooves of the left die 422a and the right die 422b form a clamping through-hole 422c for shaping the bushing 93. Wherein the first drive assembly includes a left cylinder 424a coupled to the left die 422a and a right cylinder 424b coupled to the right die 422 b. .

In order to improve the mold closing precision of the left mold 422a and the right mold 422b, a positioning column 421a is arranged at the top of the sliding platform 421, and positioning grooves matched with the positioning column 421a are symmetrically arranged on the left mold 422a and the right mold 422 b. In the present embodiment, the clamping mold 422 is a metal mold having an L-shaped longitudinal section.

The sliding cylinder 423 can control the sliding platform 421 to slide laterally, so that the sliding platform 421 can slide from one side of the tweezing station 33 to one side of the belt supply mechanism 41 (see fig. 2). When the sliding platform 421 is located at one side of the tweezing station 33, the clamping through hole 422c of the clamping mold 422 is opposite to the tweezing through hole 331 (see fig. 5); when the sliding platform 421 is located at one side of the tape supply mechanism 41, the clamping mold 422 is opposite to the arc-shaped end of the tape supply mechanism 41.

Referring to fig. 16, the tape cutting mechanism 43 includes a tape cutting blade 434 and a tape cutting cylinder 432 for driving the tape cutting blade 434 to vertically slide. In this embodiment, the automatic threading machine for a piano shaft bracket is provided with a tape cutting bracket 431 and a tape cutting cylinder 432 mounted on the tape cutting bracket 431 at one side of the tape supplying mechanism 41. Wherein, the vertical setting of cutting belting cylinder 432 and the vertical downward setting of piston rod of cutting belting cylinder 432, and the piston rod bottom of cutting belting cylinder 432 is provided with a blade support 433, and the both sides of blade support 433 are provided with one respectively and are had a cutting belting blade 434 that corresponds with two clitellum modules 42.

Referring to fig. 15 again, in order to improve the cutting capability of the belt cutting device to the end of the belt, the thickness of the clamping mold 422 is larger than the width of the bushing 93, and the top of the clamping mold 422 is provided with a cutting groove 422d for inserting the belt cutting blade 434, wherein the thickness from the cutting groove 422d to the end surface of the clamping mold 422 on the side close to the threading station 33 is equal to the width of the bushing 93.

Referring to fig. 17, the threading mechanism 44 includes a threading thimble 442 facing the threading through hole 331 of the threading station 33, and a threading cylinder 441 driving the threading thimble 442 to slide longitudinally.

Referring to fig. 2 and 6, the discharging device 8 includes a discharging chute 81 and a discharging cylinder 82. The discharging slide 81 is perpendicular to the working slide 3 and is communicated with the working slide 3, the discharging slide 81 is provided with a discharging station 811 at a position communicated with the working slide 3, and the discharging cylinder 82 is arranged at one side of the discharging station 811 and ejects the piano shaft bracket 9 (refer to fig. 18) on the discharging station 811 along the length direction of the discharging slide 81.

The tweezing step of the tweezing device 4 is as follows:

1. after the piano shaft frame 9 is pressed by the pressing device 6 of the tweezing station 33, the sliding cylinder 423 acts to move the sliding platform 421, the clamping mold 422 and the first driving component to one side of the belt supply mechanism 41, and the clamping mold 422 in the endless belt module 42 is in a mold opening state;

2. the tape supplying platform 411 slides towards the clamping die 422 under the action of the tape supplying cylinder 414, and then the forming cylinder 413 drives the tape pressing mechanism 412 to further slide towards the clamping die 422;

3. the left cylinder 424a and the right cylinder 424b respectively drive the left die 422a and the right die 422b, and the clamping die 422 is closed, so that the end part of the woolen belt is pressed in the clamping through hole 422c by the clamping die 422, and the end part of the woolen belt forms an annular bushing woolen 93;

4. the belt supply cylinder 414 and the forming cylinder 413 are reset respectively, and the end part of the woolen belt is clamped by the clamping mold 422, so that the woolen belt is pulled out, and the length of the woolen belt inserted into the clamping mold 422 next time is ensured;

5. the belt cutting mechanism 43 operates, the belt cutting cylinder 432 drives the belt cutting blade 434 to descend, the end of the belt is cut off, and the belt is reset, and at the moment, the shaft bushing nylon 93 is formed in the clamping through hole 422c of the clamping die 422;

6. the sliding cylinder 423 moves the sliding platform 421, the clamping mold 422 and the first driving component to one side of the tweezing station 33, and the magnet clamping through hole 422c is opposite to the tweezing through hole 331;

7. the tweezing cylinder drives the tweezing thimble to eject out, and the bushing tweezer 93 in the clamping through hole 422c is ejected into the bushing hole 92 of the shaft bracket;

8. the tweezing cylinder resets to complete the tweezing process of the piano shaft bracket 9.

The processing steps of the automatic nylon threading machine for the piano shaft bracket are as follows:

1. the piano shaft bracket 9 is conveyed to a feeding station 31 of the working slide way 3 by the rotary feeding table 21 through a feeding slide way 22;

2. the first pushing cylinder 53 of the pushing device 5 acts to synchronously push out the pushing slide block, the second pushing cylinder 54 and the pushing rod 55, and push the piano shaft bracket 9 at the feeding station 31 to the glue injection station 32;

3. the pressing device 6 at the glue injection station 32 presses the piano shaft frame 9, and the glue injection device 71 and the glue supply device 72 operate to realize glue injection on the piano shaft frame 9;

4. after the pressing device 6 of the glue injection station 32 is reset, the second pushing cylinder 54 of the pushing device 5 acts to further push out the pushing rod 55, push the piano shaft bracket 9 at the glue injection station 32 to the tweezing station 33, and push out the piano shaft bracket 9 originally positioned on the tweezing station 33, so that the piano shaft brackets 9 of the discharging section 34 all move forward by one station, the piano shaft bracket 9 at the tail of the discharging section 34 enters the discharging station 811 of the discharging slide way 81, the discharging cylinder 82 of the discharging device 8 is pushed out, and the piano shaft bracket 9 positioned on the discharging station 811 is pushed out;

5. after the piano shaft bracket 9 is tightly pressed on the tweezing station 33 by the pressing device 6 of the tweezing station 33, the tweezing device 4 starts to act to complete the tweezing process;

6. and the material pressing device 6 of the tweezing station 33 is reset to wait for the next process.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. An automatic tweezer for a piano shaft bracket is characterized by comprising a tweezing platform and two tweezing devices (4) symmetrically arranged at two sides of the tweezing platform;

the tweezing platform is provided with a tweezing station (33) for placing the piano shaft bracket (9);

the tweezing device (4) comprises a belt supply mechanism (41) which is transversely staggered with the tweezing station (33), a ring belt module (42) which transversely slides between the belt supply mechanism (41) and the tweezing station (33), a belt cutting mechanism (43) positioned on one side of the belt supply mechanism (41) and a tweezing mechanism (44) positioned on one side of the tweezing station (33);

the belt supply mechanism (41) comprises a belt supply platform (411) for placing a woolen belt, a belt pressing mechanism (412) which is arranged on the belt supply platform (411) and presses the woolen belt, and a belt supply cylinder (414) for controlling the longitudinal sliding of the belt supply platform (411);

the ring belt module (42) comprises a sliding platform (421), a clamping mould (422) arranged on the sliding platform (421), a first driving component for controlling the mould opening/closing of the clamping mould (422) and a sliding cylinder (423) for driving the sliding platform (421) to transversely slide, wherein the clamping mould (422) is provided with a clamping through hole (422c) for placing the bushing (93);

the belt cutting mechanism (43) comprises a belt cutting blade (434) and a belt cutting cylinder (432) for driving the belt cutting blade (434) to vertically slide;

the threading mechanism (44) is positioned on one side of the tweezing station (33) and comprises a tweezing thimble (442) opposite to the tweezing hole (92) of the shaft frame on the tweezing station (33) and a tweezing cylinder (441) for driving the tweezing thimble (442) to longitudinally slide.

2. The automatic tweezer for piano shaft brackets according to claim 1, wherein the clamping mold (422) comprises a left mold (422a) and a right mold (422b), the first driving assembly comprises a left air cylinder (424a) for controlling the left mold (422a) to slide transversely and a right air cylinder (424b) for controlling the right mold (422b) to slide transversely, positioning columns (421a) are arranged at the top of the sliding platform (421), and positioning grooves matched with the positioning columns (421a) are symmetrically arranged on the left mold (422a) and the right mold (422 b); and a cutting groove (422d) for a belt cutting blade (434) to extend into is formed in the top of the clamping die (422).

3. The automatic threading machine of piano shaft bracket of claim 1, characterized in that, the belt-pressing mechanism (412) comprises a belt-pressing bracket (412a), a belt-pressing plate (412b) rotatably mounted on the belt-pressing bracket (412a), and a rotary torsion spring (412c), the belt-pressing bracket (412a) has a belt-pressing base (412d) for placing the end of the belt at one end near the belt module (42), the rotary torsion spring (412c) drives the belt-pressing plate (412b) to have the tendency of pressing the belt on the supporting base at all times, and the top of the belt-pressing base (412d) has a shaped arc groove (412d1) which is concave downwards and through which the belt passes.

4. The automatic threading machine of piano shaft bracket of claim 3, characterized in that, the belt feeding platform (411) is further provided with a forming cylinder (413) for driving the belt pressing mechanism (412) to slide longitudinally.

5. The automatic tweezer for the piano shaft bracket according to any one of claims 1 to 4, characterized in that the tweezing platform is a working slideway (3) for sliding the piano shaft bracket (9), and the working slideway (3) is provided with through holes (331) opposite to the tweezing holes (92) of the piano shaft bracket (9) on the tweezing station (33) at two sides of the tweezing station (33); the automatic tweezer for the piano shaft bracket further comprises a feeding device, a pushing device (5) and a pressing device (6); the feeding device comprises a vibrating disk and a feeding slideway (22) for conveying the piano shaft bracket (9) in the vibrating disk to the working slideway (3); the pushing device (5) comprises a pushing rod (55) and a driving assembly for driving the pushing rod (55) to push the piano shaft frame (9) to the tweezing station (33); the pressing device (6) can be used for pressing the piano shaft bracket (9) pushed to the tweezing station (33) by the pushing device (5).

6. The automatic nylon thread penetrating machine for the piano shaft bracket according to claim 5, wherein a glue injection station (32) for placing the piano shaft bracket (9) is further arranged between the feeding slide way (22) and the nylon thread penetrating station (33) of the working slide way (3), glue injection through holes (321) which are right opposite to glue lining holes (92) of the shaft bracket on the glue injection station (32) are formed in two sides of the glue injection station (32) of the working slide way (3), glue injection devices (71) and glue supply devices (72) for supplying glue to the glue injection devices (71) are symmetrically arranged on two sides of the glue injection station (32) of the automatic nylon thread penetrating machine for the piano shaft bracket, and the driving devices can drive the material pushing rods (55) to push the piano shaft bracket (9) to the glue injection station (32).

7. The automatic nylon threading machine of the piano shaft bracket as claimed in claim 6, wherein the glue injection device (71) comprises a glue injection bracket (711), a glue injection outer pipe (712) arranged on the glue injection bracket (711), a glue injection inner pipe (713) slidably arranged on the glue injection outer pipe (712) and connected with the glue supply device (72), a first glue injection cylinder (714) for driving the glue injection bracket (711) to longitudinally slide, and a second glue injection cylinder (715) for driving the glue injection inner pipe (713) to longitudinally slide in the glue injection outer pipe (712), wherein the glue injection inner pipe (713) is provided with a glue injection needle tube inserted into the glue injection through hole (321).

8. The automatic threading machine of the piano shaft bracket of claim 7, wherein the glue injection support (711) is provided with a glue cutting mechanism (73) for cutting off residual glue at the end of the glue injection needle tube (713 a), the glue cutting mechanism (73) comprises a glue cutting support (731) arranged on the glue injection support (711), a glue cutting cylinder (732) arranged on the glue cutting support (731) and a glue cutting blade (733) driven by the glue cutting cylinder (732) and vertically translated, and the glue cutting support (731) is further provided with a residual glue groove (734) corresponding to the glue cutting blade (733) and allowing the residual glue to fall off.

9. The automatic lining machine of a piano shaft bracket of claim 6, wherein the glue supply device (72) comprises a glue supply gun (721) and a glue discharge control valve (722), the glue supply gun (721) comprises a gun tube (721a) and a glue supply piston (721b) which is arranged in the gun tube (721a) in a sealing and sliding manner, an air inlet head (721c) and a glue discharge head (721d) are respectively arranged at two ends of the gun tube (721a), the glue discharge control valve (722) is a two-way control valve, an air inlet of the gun tube (721a) is connected with an air supply system, the glue discharge head (721d) of the gun tube (721a) is connected with an inlet of the glue discharge control valve (722), and an outlet of the glue discharge control valve (722) is connected with the glue injection device (71).