Slitting equipment for piano hammer head

Abstract

The invention discloses slitting equipment for piano hammer heads, which is used for cutting and separating felts wrapped on a plurality of wood cores to form hammer heads which are independent one by one, and comprises a feeding mechanism, a slitting mechanism and a discharging mechanism which are arranged in sequence, the material pushing assembly drives the whole hammer head to advance along the first track, the material pressing assembly presses the hammer head arranged at the second position, the material clamping assembly clamps the top end of the wood core arranged at the first position, the material clamping assembly slightly pulls the corresponding wood core firstly, so that a gap is formed between the wood core at the first position and the wood core at the second position, and then the material clamping assembly clamps the top end of the wood core at the second position. When the hammer head is pushed down, the cutting assembly cuts down along the gap so as to cut and separate the felt between the two wood cores, the clamping assembly drives the hammer head to retreat from the cutting assembly and then enables the hammer head to fall on the second track, the first pushing assembly pushes the hammer head down to one side, and the second pushing assembly pushes the hammer head down to the other side. And the second material pushing device pushes the hammer heads to advance along the second track, so that the hammer heads are output on the second track in a unified arrangement state.

Description

Technical Field

[0001] The invention relates to the technical field of piano manufacturing and processing, in particular to a cutting device for piano hammers. Background Art

[0002] like Figure 1 As shown, the manufacturing process of the hammer is to first manufacture multiple wood cores, then use a jig to arrange and compact the multiple wood cores into strips, then press a whole strip of felt onto the whole strip of wood cores to form a whole hammer, and finally cut the felt on the two wood cores to form a single hammer.

[0003] The current method of slitting the hammer is: a manually assisted foot-operated slitting machine is used to cut the hammer. The operator places the entire hammer in the mold groove of the slitting machine with the white felt at the bottom and the wooden core at the top. The left hand holds the hammer steady to make it vertical, and the right hand pulls the front end of the hammer to be cut to the right to open a small slit, and then uses the foot to step on the cutter to cut the white felt part of the hammer downward along the opened slit to separate the hammer.

[0004] This slitting method has the following disadvantages: 1. Disadvantages in processing quality: When cutting the hammer, the operator has to manually pull the hammer open to form a thin slit cut by the cutter. Different forces can be pulled apart to different distances, and the positioning of the workpiece is unstable, resulting in the cutter and the hammer cutting surface not being perpendicular. In addition to cutting the wood core, the quality problem will also cause the felt to have an uneven cut surface with rough edges, and sometimes it will be concave or convex; 2. Disadvantages of the processing method: Since the positioning depends on manual movement and the position needs to be manually positioned visually, the processing quality is unstable and prone to quality problems. The right hand is near the position where the cutter cuts, and there is a safety hazard of cutting the hand. Summary of the invention

[0005] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a slitting device for piano hammers, eliminate the quality problems and safety hazards of manual slitting, ensure the consistency and stability of product processing quality, and realize the automation of the product processing method of this process. The technical solution of the present invention is as follows: A cutting device for piano hammers, comprising: The feeding mechanism comprises: a first track, a material pushing assembly and a material pressing assembly; the first track has an axially extending guide groove, the shape of the guide groove is adapted to the shape of the bottom end of the felt, the material pushing assembly is movably arranged on the first track, and the material pressing assembly is arranged above the output end position of the first track; The slitting mechanism comprises: a bracket, a cutting assembly, and a material clamping assembly; the bracket is located on one side of the first track; the cutting assembly is arranged on the bracket and is located above the output end side of the first track, and the material clamping assembly is arranged on the side of the cutting assembly away from the first track; The discharging mechanism includes: a second track, a first pushing device and a second pushing device; the second track is located below the clamping assembly, the axes of the first track and the second track are on the same vertical plane, and the height of the second track is lower than the first track; the first pushing device is arranged on one side of the input end of the second track, the driving direction of the first pushing device is horizontal and perpendicular to the axis of the second track, the second pushing device is arranged at the input end of the second track, and the driving direction of the second pushing device is parallel to the axis direction of the second track.

[0006] Furthermore, the feeding mechanism also includes a pair of limit blocks, and the limit blocks are arranged on both sides of the top surface of the output end of the first track.

[0007] Furthermore, the pushing assembly includes a first pushing block, a traction rope, a pulley and a counterweight block; the first pushing block is slidably arranged on the first track, one end of the traction rope is connected to the first pushing block, and the other end is connected to the counterweight block, the pulley is arranged on the output end side of the first track, and the traction rope is wound around the pulley.

[0008] Furthermore, the slitting mechanism also includes a contact feedback device, which is arranged above the clamping assembly and located in the axial direction of the first track.

[0009] Furthermore, the pressing assembly includes a second cylinder and a pressing block, the second cylinder is arranged on the bracket, and the pressing block and the second cylinder are drivingly connected.

[0010] Furthermore, the pressing assembly also includes a support block, which is arranged on the first track and located on one side of the first track close to its output end. The pressing block is in the shape of an elongated strip, one end of the pressing block is rotatably connected to the output end of the second cylinder, and the other end of the pressing block is rotatably connected to the support block.

[0011] Furthermore, a top surface of the pressing block on a side close to the slitting mechanism is inclined downward.

[0012] Furthermore, the material clamping assembly includes: a clamping hand, a third cylinder, a fourth cylinder and a fifth cylinder, the clamping hand is connected to the third cylinder, the third cylinder is connected to the fourth cylinder, and the fourth cylinder is connected to the fifth cylinder.

[0013] Furthermore, the second pushing device includes a seventh cylinder and a third pushing block, and the third pushing block is arranged at the output end of the seventh cylinder.

[0014] Furthermore, the third pushing block has a guide surface, and the guide surface is inclined from top to bottom toward one side of the output end of the second track.

[0015] Compared with the prior art, the present invention has the following beneficial effects: Automatic hammer cutting can replace manual processing, and can automatically complete the cutting of the entire hammer one by one, so that the cutting surface can be smooth and without burrs, eliminating the quality problems and safety hazards of manual cutting, improving the safety of hammer cutting, ensuring the consistency and stability of product processing quality, and realizing the automation of the product processing method of this process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 It is a stereogram of a whole string hammer and a single string hammer in the background art; Figure 2 is a front view of the slitting device of the present invention; Figure 3 It is a partial schematic diagram of the feeding mechanism in the present invention (including the bracket and cutting assembly of the slitting mechanism); Figure 4 It is a partial schematic diagram of the discharging mechanism in the present invention (including the gripper assembly and contact feedback device of the slitting mechanism); Description of Figure Numbers: 11-first track; 12-pushing assembly; 121-first pushing block; 122-traction rope; 123-pulley; 124-counterweight block; 13-pressing assembly; 131-second cylinder; 132-pressing block; 133-supporting block; 14-limiting block; 21-bracket; 22-cutting assembly; 221-first cylinder; 222-cutter; 23-gripping assembly; 231-gripping hand; 232-third cylinder; 233-fourth cylinder; 234-fifth cylinder; 24-contact feedback device; 31-second track; 32-first pusher; 321-sixth cylinder; 322-second pusher; 33-second pusher; 331-seventh cylinder; 332-third pusher; 4-hammer; 41-wood core; 42-felt. DETAILED DESCRIPTION

[0018] In order to better understand the purpose, structure, features and effects of the present invention, the present invention is further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that the features shown in the drawings are not necessarily drawn to scale. In addition, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", "front", "back" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. In addition, in the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0020] like Figure 2 As shown, the present embodiment is a slitting device for piano hammers, which is used to cut and separate the felt 42 wrapped on a plurality of wood cores 41 one by one to form independent hammers 4 one by one, and the slitting device includes a feeding mechanism, a slitting mechanism and a discharging mechanism which are sequentially arranged along the transmission direction; The feeding mechanism comprises: a first track 11, a pusher assembly 12 and a presser assembly 13; the first track 11 has an axially extending guide groove, the shape of which is adapted to the shape of the bottom end of the felt 42, and the string hammers 4 are placed on the first track 11 so that the string hammers 4 remain in an upright state; the pusher assembly 12 is movably arranged on the first track 11, and is used to drive the entire string hammer 4 to feed to the slitting mechanism; the presser assembly 13 is arranged above the output end position of the first track 11, and is used to press the string hammers 4 arranged in the second position and behind it; The slitting mechanism includes: a bracket 21, a cutting assembly 22, and a clamping assembly 23; the bracket 21 is located at one side of the first track 11; the cutting assembly 22 is arranged on the bracket 21 and is located above the output end side of the first track 11, and the cutting assembly 22 is used to cut the felt 42 between two wood cores 41; the clamping assembly 23 is arranged at a side of the cutting assembly 22 away from the first track 11, and the clamping assembly 23 is used to clamp the wood core 41 arranged in the first position, and realize the functions of pulling and withdrawing the material; The discharging mechanism includes: a second track 31, a first pushing device 32 and a second pushing device 33; the second track 31 is located below the clamping assembly 23, the axes of the first track 11 and the second track 31 are in the same vertical plane, and the height of the second track 31 is lower than the first track 11; the first pushing device 32 is arranged on one side of the input end of the second track 31, the driving direction of the first pushing device 32 is horizontal and perpendicular to the axis of the second track 31, and the first pushing device 32 is used to push the hammer 4 on the second track 31 to one side; the second pushing device 33 is arranged at the input end of the second track 31, the driving direction of the second pushing device 33 is parallel to the axis direction of the second track 31, and the second pushing device 33 is used to push the hammer 4 forward along the second track 31.

[0021] The pusher assembly 12 drives the entire string hammer 4 to move forward along the first track 11; Among them, because the workpiece is pressed in the previous process, the wooden core 41 of a single string hammer 4 is squeezed and then glued together with the whole felt 42. When manually cutting, the wooden core 41 of the string hammer 4 is pulled to both sides with both hands to facilitate the cutting of the string hammer 4 so that the cutter 222 will not cut the wooden core 41 when cutting the felt 42 downward. Therefore, in the design of the action of pulling the slit, the pressing component 13 presses the string hammer 4 arranged at the second position and the hammer 4 behind it, and the clamping component 23 clamps the top of the wooden core 41 arranged at the first position. The clamping component 23 first gently pulls the corresponding wooden core 41 to make a gap between the first and second wooden cores 41, and the cutting component 22 cuts down along the gap to cut and separate the felt 42 between the two wooden cores 41; Since the string hammer 4 is in a single state after being cut, the string hammer 4 cannot maintain a vertical upright state on the second track 31, which will cause inconsistent material discharge. Therefore, a correcting position cylinder action is performed on the second track 31, and the clamping assembly 23 then drives the string hammer 4 to withdraw from the cutting assembly 22, and then releases the string hammer 4 to make it fall on the second track 31. The string hammer 4 is pushed to one side by the first pushing assembly 12, and the second pushing device 33 pushes the string hammer 4 to move forward along the second track 31, so that the string hammer 4 is output on the second track 31 in a uniform arrangement state.

[0022] like Figure 3 As shown, as a preferred solution, the feeding mechanism also includes a pair of limit blocks 14, and the limit blocks 14 are arranged on both sides of the top surface of the output end of the first track 11. The limit blocks 14 are used to horizontally limit the top end of the wooden core 41 to keep the hammer 4 in an upright state.

[0023] like Figure 3As shown, as a preferred solution, the pushing assembly 12 includes a first pushing block 121, a traction rope 122, a pulley 123 and a counterweight 124; the first pushing block 121 is slidably arranged on the first track 11, one end of the traction rope 122 is connected to the first pushing block 121, and the other end is connected to the counterweight 124, the pulley 123 is arranged on the output end side of the first track 11, and the traction rope 122 is wound around the pulley 123; the gravity exerted on the counterweight 124 is converted into a horizontal thrust of the first pushing block 121 through the pulley 123, so as to push the hammer 4 on the first track 11 to feed toward the slitting mechanism.

[0024] like Figure 4 As shown, further, the slitting mechanism also includes a contact feedback device 24, which is arranged above the clamping assembly 23 and located in the axial direction of the first track 11; specifically, under the advancement of the pushing assembly 12, the hammer 4 abuts against the contact feedback device 24, and the contact feedback device 24 feeds back information to the clamping assembly 23, cutting assembly 22 and other components to continue the subsequent slitting process.

[0025] like Figure 3 As shown, as a preferred solution, the pressing assembly 13 includes a second cylinder 131 and a pressing block 132 . The second cylinder 131 is disposed on the bracket 21 , and the pressing block 132 and the second cylinder 131 are drivingly connected.

[0026] like Figure 3 As shown, further, the pressing assembly 13 also includes a support block 133, and the support block 133 is arranged on the first track 11 and is located on the side of the first track 11 close to its output end. The pressing block 132 is in the shape of an elongated strip, and one end of the pressing block 132 is rotatably connected to the output end of the second cylinder 131, and the other end of the pressing block 132 is rotatably connected to the support block 133; in this way, when using one cylinder, the contact area of ​​the pressing block 132 can be increased, ensuring that the second hammer 4 can be pressed tightly, and the hammer 4 behind it can also be pressed down to prevent the occurrence of arching and the like.

[0027] like Figure 3 As shown, preferably, the top surface of the pressing block 132 on one side close to the slitting mechanism is tilted downward, so that the rigidity of the pressing block 132 can be ensured while avoiding the vertical movement space of the slitting mechanism to avoid interference.

[0028] like Figure 3As shown, as a preferred solution, the cutting assembly 22 includes a first cylinder 221 and a cutter 222; the first cylinder 221 is arranged on the bracket 21, and the cutter 222 can be slidably arranged on the bracket 21 up and down, and the first cylinder 221 and the cutter 222 are driven and connected to drive the cutter 222 to move downward to cut the felt 42.

[0029] like Figure 4 As shown, since the pulling distance is greater than the thickness of the bottom end of the cutter 222, the felt 42 can be cut along the gap between the two wood cores 41 when cutting; at the same time, the pulling distance cannot be too large, otherwise the bottom end of the felt 42 will be deformed and stretched too much, and the felt 42 will have burrs and depressions when cutting, causing quality problems. As a preferred solution, the material clamping assembly 23 includes: a clamping hand 231, a third cylinder 232, a fourth cylinder 233 and a fifth cylinder 234, the clamping hand 231 is connected to the third cylinder 232, the third cylinder 232 is connected to the fourth cylinder 233, and the fourth cylinder 233 is connected to the fifth cylinder 234; specifically, the third cylinder 232 is used to drive the clamping hand 231 to clamp and release the wood core 41, the fourth cylinder 233 is used to drive the clamping hand 231 to pull the material, and the fifth cylinder 234 is used to drive the clamping hand 231 to withdraw the material; by setting three different types of cylinders, different functions are realized respectively, so as to achieve precise operation.

[0030] like Figure 4 As shown, as a preferred solution, the first pushing device 32 includes a sixth cylinder 321 and a second pushing block 322 , the sixth cylinder 321 is arranged on one side of the second track 31 , and the second pushing block 322 is arranged at the output end of the sixth cylinder 321 .

[0031] like Figure 4 As shown, further, the second pushing device 33 includes a seventh cylinder 331 and a third pushing block 332, and the third pushing block 332 is arranged at the output end of the seventh cylinder 331; like Figure 4 As shown, further, the third push block 332 has a guide surface, and the guide surface is inclined from top to bottom toward one side of the output end of the second track 31, and the hammer 4 is guided to fall to the second track 31 through the guide surface.

[0032] Specifically, the working process of the slitting equipment is as follows: (1) placing the entire hammer 4 on the first rail 11, and pulling the first push block 121 to the side of the hammer 4 close to the input end of the first rail 11; (2) When the first push block 121 drives the hammer 4 to abut against the contact feedback device 24, the third cylinder 232 drives the clamping hand 231 to clamp the top of the wood core 41 arranged in the first position, and the pressing assembly 13 presses the hammer 4 arranged in the second position and behind it; (3) The fourth cylinder 233 drives the gripper 231 to gently pull the top of the first wood core 41, so that a gap appears between the first and second wood cores 41; (4) The first cylinder 221 drives the cutter 222 to move downward, cut along the above-mentioned gap, and separate the felt 42 between the first and second wood cores 41; (5) The fifth cylinder 234 drives the clamping hand 231 to move the cut hammer 4 backward, and the third cylinder 232 drives the clamping hand 231 to release the hammer 4, so that the hammer 4 falls onto the second track 31; (6) The first pushing device 32 pushes the hammers 4 to tilt to one side, and the second pushing device 33 pushes the hammers 4 to move along the output end of the second track 31. Under the push of the hammers 4 cut out subsequently, the formed hammers 4 are arranged on the second track 31 for output.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cutting device for piano hammers, characterized in that: include: The feeding mechanism comprises: a first track (11), a material pushing assembly (12) and a material pressing assembly (13); the first track (11) has an axially extending guide groove, the shape of the guide groove is adapted to the shape of the bottom end of the felt (42), the material pushing assembly (12) is movably arranged on the first track (11), and the material pressing assembly (13) is arranged above the output end position of the first track (11); The slitting mechanism comprises: a bracket (21), a cutting assembly (22), and a material clamping assembly (23); the bracket (21) is located on one side of the first track (11); the cutting assembly (22) is arranged on the bracket (21) and is located above the output end side of the first track (11); the material clamping assembly (23) is arranged on a side of the cutting assembly (22) away from the first track (11); The discharging mechanism comprises: a second track (31), a first pushing device (32) and a second pushing device (33); the second track (31) is located below the clamping assembly (23); the axes of the first track (11) and the second track (31) are on the same vertical plane, and the height of the second track (31) is lower than that of the first track (11); the first pushing device (32) is arranged on one side of the input end of the second track (31); the driving direction of the first pushing device (32) is horizontal and perpendicular to the axis of the second track (31); the second pushing device (33) is arranged at the input end of the second track (31); the driving direction of the second pushing device (33) is parallel to the axis of the second track (31).

2. A cutting device for piano hammers according to claim 1, characterized in that: The feeding mechanism further comprises a pair of limit blocks (14), wherein the limit blocks (14) are arranged at two sides of the top surface of the output end of the first track (11).

3. A cutting device for piano hammers according to claim 1, characterized in that: The pushing assembly (12) comprises a first pushing block (121), a traction rope (122), a pulley (123) and a counterweight (124); the first pushing block (121) is slidably arranged on the first track (11); one end of the traction rope (122) is connected to the first pushing block (121) and the other end is connected to the counterweight (124); the pulley (123) is arranged on the output end side of the first track (11), and the traction rope (122) is wound around the pulley (123).

4. A cutting device for piano hammers according to claim 3, characterized in that: The slitting mechanism further comprises a contact feedback device (24), wherein the contact feedback device (24) is arranged above the material clamping assembly (23) and is located in the axial direction of the first track (11).

5. The piano hammer cutting device according to claim 1, characterized in that: The material pressing assembly (13) comprises a second cylinder (131) and a pressing block (132); the second cylinder (131) is arranged on the bracket (21); and the pressing block (132) and the second cylinder (131) are drivingly connected.

6. A cutting device for piano hammers according to claim 5, characterized in that: The pressing assembly (13) further comprises a support block (133), wherein the support block (133) is arranged on the first track (11) and is located on a side of the first track (11) close to its output end, and the pressing block (132) is in the shape of an elongated strip, one end of the pressing block (132) is rotatably connected to the output end of the second cylinder (131), and the other end of the pressing block (132) is rotatably connected to the support block (133).

7. A cutting device for piano hammers according to claim 6, characterized in that: The top surface of the pressing block (132) on one side close to the slitting mechanism is inclined downward.

8. The piano hammer cutting device according to claim 1, characterized in that: The material clamping assembly (23) comprises: a clamping hand (231), a third cylinder (232), a fourth cylinder (233) and a fifth cylinder (234); the clamping hand (231) is connected to the third cylinder (232), the third cylinder (232) is connected to the fourth cylinder (233), and the fourth cylinder (233) is connected to the fifth cylinder (234).

9. The piano hammer cutting device according to claim 1, characterized in that: The second pushing device (33) comprises a seventh cylinder (331) and a third pushing block (332), and the third pushing block (332) is arranged at the output end of the seventh cylinder (331).

10. The piano hammer cutting device according to claim 9, characterized in that: The third push block (332) has a guide surface, and the guide surface is inclined from top to bottom toward one side of the output end of the second track (31).

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