A feeding device of a hardware cold-drawing machine

Abstract

The present application relates to the technical field of machining, in particular to a feeding device of hardware cold-drawing machine, which comprises a lower station, a support, a feeding plate, a feeding groove, a pushing machine, a pushing plate and a conversion station, the support is fixedly installed on the lower station, the feeding plate is fixedly installed on the support, three feeding grooves are formed in the feeding plate, the pushing machine is arranged on the feeding plate, and the pushing plate is fixedly installed on the pushing machine, three blanking grooves corresponding to the feeding grooves are arranged in the fixing seat on the feeding plate, the pipe in the blanking groove is screened by the limiting unit, so that the fixing seat can automatically feed the set number of pipes into the feeding groove at the same time when the pushing machine pushes the pipes into the conversion station and resets, the use of manpower is reduced, the production cost is reduced, the pushing work can be immediately carried out after the feeding machine resets, the production time is saved, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical processing, in particular to a feeding device of a hardware cold-drawing machine. BACKGROUND

[0002] Metal pipes can be processed into hardware such as elbows, wire clamps, flanges, etc. In order to improve the quality of hardware, the pipes need to be processed by a cold-drawing machine before being processed into hardware, so as to improve the material properties such as strength, hardness, surface quality, etc.

[0003] The cold-drawing of pipes is the initial step of producing these hardware, in order to speed up the production, three-line cold-drawing machines are usually used in factories, which can process three pipes at a time, and the three-line cold-drawing machine is divided into an upper station, a conversion station and a lower station, the pipes to be processed are transported to the upper station, the upper pipes are transported to the lower station through the conversion station, and the cold-drawing of the pipes is realized.

[0004] One side of the cold-drawing machine is usually provided with a feeding machine, which transports the pipes to one side of the cold-drawing machine, and there are various ways to load the pipes into the cold-drawing machine in the prior art, one of which is to manually put the pipes into the three feeding grooves in the upper station in sequence, the second is to put the pipes into the three feeding grooves in the upper station in sequence by manually controlling the mechanical equipment, and the third is to automatically and synchronously put three pipes into the three feeding grooves, and then the pipes are fed into the conversion station by the pusher in the upper station.

[0005] In the above feeding methods, the first and second feeding methods make the pusher wait for the pipes to be filled after returning to the initial position before working, which reduces the work efficiency, and the third feeding method requires a large investment in equipment cost, which is difficult to popularize in small and medium-sized enterprises.

[0006] Therefore, a feeding device of a hardware cold-drawing machine is proposed. SUMMARY

[0007] The purpose of the present application is to provide a feeding device of a hardware cold-drawing machine, which can automatically and quickly place three pipes in the feeding grooves synchronously, and has a low cost.

[0008] To achieve the above purpose, the present application provides the following technical scheme:

[0009] A feeding device of a hardware cold-drawing machine, comprising: a lower station, a support, a feeding plate, a feeding groove, a pusher, a push plate, a conversion station, the lower station is fixedly installed with a support, the support is fixedly installed with a feeding plate, three feeding grooves are formed in the feeding plate, the feeding plate is provided with a pusher, and the pusher is fixedly installed with a push plate.

[0010] Preferably, the front fixed seat is installed on the support close to the conversion station, the rear fixed seat is installed on the support away from the conversion station, three blanking grooves are formed on the front fixed seat and the rear fixed seat, the blanking grooves in each fixed seat correspond to the feeding grooves one by one, the pipes are accumulated in the blanking grooves, and the blanking grooves can accommodate at most two pipes at one time in the height direction, and the blanking grooves are provided with a limiting unit, which controls the number of pipes falling into the feeding grooves from the blanking grooves by using the power of the pushing machine in the process of pushing the pipes from the feeding grooves.

[0011] The upper side of the feeding plate is provided with a pushing machine, and the pushing machine is a slope plate provided with a stop block to prevent the pipes from falling irregularly on the feeding plate. After the pipes on the feeding plate are pushed into the conversion station by the pushing machine, the worker manually fills the pipes on the slope plate into the feeding grooves on the feeding plate.

[0012] After the application is installed, the stop block on the slope plate can be removed, so that the pipes can freely roll on the fixed seat and fill the blanking grooves. At this time, the two ends of the pipes are located on two fixed seats respectively, and the blanking grooves correspond to the feeding grooves one by one. The fixed seat close to the conversion station is called the front fixed seat, and the fixed seat away from the conversion station is called the rear fixed seat. When the pipes are pushed into the conversion station by the pushing machine, the limiting unit releases the pipes in the front fixed seat first, so that the pipes fall on the pushing plate. Similarly, after the pushing machine is reset, the pipes in the rear fixed seat are released, and finally the pipes fall into the feeding grooves. The automatic filling of the pipes into the feeding grooves is realized, the use of manpower is reduced, the cost is saved, and the labor intensity of the workers is reduced.

[0013] The fixed seat is C-shaped and invertedly buckled on the feeding plate, the height of the fixed seat is greater than the height of the pushing machine, so as to provide space for the movement of the pushing machine. In order to ensure that the pipes on the lower rack fall into the feeding grooves and the pipes are timely supplemented into the lower rack after the pushing machine is reset, the pipes are quickly filled into the feeding grooves, so that the pushing machine can immediately start pushing work and ensure the production efficiency. The depth of the blanking groove is set to accommodate two pipes at one time. This setting not only ensures the production efficiency, but also ensures that the bottom pipe receives the smallest pressure, guarantees the shape of the pipe, and reduces the height of the falling pipes and the impact between the pipes, so as to ensure the surface quality of the pipes.

[0014] Preferably, the limiting unit comprises a gear wheel I rotatably mounted in each of the blanking grooves, two end faces of the gear wheel I being parallel to the side walls of the blanking grooves, an upper rack and a lower rack being slidably mounted in each of the blanking grooves and being in mesh with the gear wheel I, a sliding block being fixedly mounted on the side wall of each of the upper rack and the lower rack, a sliding groove being formed in the fixed seat and being in cooperation with the sliding block, the pipe to be blanked being stored on the lower rack, a releasing block being fixedly mounted on the bottom of the lower rack, a push block being rotatably mounted on the top wall of the push plate by a torsion spring and being in cooperation with the releasing block, a taking unit being arranged on the upper rack and being used to separate the pipe in the blanking groove so that only one pipe is between the upper rack and the lower rack.

[0015] The push block is rotatably mounted on the push plate by the torsion spring, before starting work, the stopper in the feeding machine is removed, the blanking grooves are filled with the pipes, and the pipes on the feeding grooves are manually arranged, at this time, the lower rack is located in the blanking groove, and the upper rack is located outside the blanking groove.

[0016] When the pusher is located at the initial position, the push plate is located behind the lower rack of the rear fixed seat, the lower rack of the rear fixed seat can only move backward, the lower rack of the front fixed block can only move forward, and the upper rack and the lower rack cannot completely separate from the blanking groove.

[0017] In the process of pushing the pipe into the conversion station, the push plate starts from the rear of the rear fixed seat, when the push block contacts the releasing block on the rear fixed seat, the push block rotates clockwise, the pusher passes through the rear fixed seat, the push plate moves to the rear of the front fixed seat, the lower rack of the front fixed seat is pushed out of the blanking groove, as the pusher moves forward, the push block rotates clockwise, the push plate passes through the front fixed seat, one end of the pipe on the lower rack falls on the push plate, at this time, the other end of the pipe is located on the lower rack of the rear fixed seat, the upper rack of the front fixed block separates the pipe in the blanking groove under the action of the taking unit, so that only one pipe is between the upper rack and the lower rack, when the pusher returns to the initial position, the lower rack of the front fixed seat is pushed back into the blanking groove by the push block. Similarly, when the pusher moves to the rear of the rear fixed seat, the lower rack and the upper rack in the rear fixed seat repeat the above actions, except that when the lower rack moves backward, the pipe directly falls on the feeding groove. In this way, the purpose of automatically filling the pipe into the feeding groove is achieved.

[0018] It is worth noting that when the pipe falls on the push plate and the feeding machine moves backward, since one end of the pipe is located in the rear fixed seat, the pipe cannot move backward, and when the push block contacts the pipe, the push block will be flipped, so that the push plate moves backward smoothly.

[0019] Compared with the prior art, the movement of the feeding machine needs to be manually controlled, or the feeding machine needs to move backward by a distance much greater than the length of the pipe and then move forward to meet the time requirement of manually filling the feeding groove. In the present application, while achieving automatic filling of the feeding groove, the feeding machine can push out the pipe again after moving back by a distance of one length of the pipe, thereby saving time and further improving production efficiency.

[0020] Preferably, the material taking unit comprises an inclined groove opened on the side wall of the chute, and the clamping block is mounted on the sliding block through a dovetail groove. The sliding block is provided with a spring between the upper rack.

[0021] During the movement of the upper rack to the pipe, the two clamping blocks gradually converge inward along the inclined groove, cut into the pipe from both sides, and separate the two pipes in the falling groove on the upper and lower sides of the upper rack. With the movement of the upper rack, the pipe falls on the upper rack along the inclined surface of the clamping block.

[0022] The clamping block is connected with the sliding block through the dovetail groove, which can prevent the clamping block from being raised after contacting the inclined surface of the chute without affecting the sliding of the clamping block.

[0023] The side of the clamping block close to the pipe is an inclined surface with an angle of 30°<α<45°. When the angle of the inclined block is greater than 45°, the upward component force on the upper pipe will decrease, and the forward component force will increase when the inclined block cuts into the space between the two pipes in contact, which means that the elastic modulus of the torsional spring connected to the pushing block needs to be greater, and the height of the inclined block will increase too much, which is not conducive to cutting into the space between the two pipes from the side, and will greatly lift the pipe, disturb the pipe on the top wall of the fixing seat, and is not conducive to the pipe entering the falling groove. If the angle is less than 30°, the length of the clamping block will greatly increase to make the height of the clamping block equal to the height of the upper rack, which will excessively occupy the space of the falling groove, increase the length of the falling groove, and increase the width of the fixing seat to ensure the strength of the fixing seat, thereby increasing the cost.

[0024] Preferably, the distance between the upper rack and the lower rack and the distance from the top wall of the lower rack to the feeding groove are and R<c<1.5R, wherein l is the total length of the pipe, x is the length of the pipe in the falling groove, y is the distance from the top wall of the lower rack to the feeding groove, c is the distance between the upper rack and the lower rack, and R is the outer diameter of the pipe.

[0025] Since one end of the pipe falls on the push plate, the pipe will gradually separate from the push plate during the resetting of the pusher, so that the pipe falls into the blanking groove. If the distance between the upper rack and the lower rack is only R, the pipe cannot rotate, and the part of the pipe located in the rear fixed seat needs to bear the bending moment generated by the remaining part, increasing the width of the rear fixed seat can reduce the bending moment of this part, but it will increase the material and increase the cost. If the width of the fixed seat is set too small, the bending moment will increase, causing the pipe to bend.

[0026] Therefore, the distance between the upper rack and the lower rack and the distance from the top wall of the lower rack to the blanking groove should satisfy And R < c < 1.5R, where l is the total length of the pipe, x is the length of the pipe located in the blanking groove, y is the distance from the top wall of the lower rack to the blanking groove, c is the distance between the upper rack and the lower rack, and R is the outer diameter of the pipe. So that after the pipe in the front fixed seat falls on the blanking groove, the pipe in the upper rack and the lower rack in the rear fixed seat has enough space to rotate. While reducing the material of the fixed seat, it avoids bending of the pipe and ensures the processing quality.

[0027] Because the clamping block generates an upward component force on the upper pipe of the two pipes in contact through its inclined surface, the clamping block can be embedded between the two pipes. However, if c is greater than 1.5R, the downward component force generated by the two clamping blocks on the pipe when clamping or separating the two pipes in contact will be greater than the upward component force, making it difficult to embed between the two pipes, and the pipe cannot be separated.

[0028] It is worth mentioning that when one end of the pipe falls on the push plate, due to the inclination of the pipe body and the continuous movement of the pusher away from the front fixed seat, the end located in the rear fixed seat slides out of the blanking groove, so that the blanking groove is filled in advance. This situation does not affect the subsequent storage of the fixed seat and the pushing out of the pusher.

[0029] Preferably, the blanking groove is a vertical groove, the top wall of the fixed seat is an inclined surface, the side of the fixed seat away from the feeder is lower than the side of the fixed seat close to the feeder, and a guardrail is fixedly installed on the top wall of the fixed seat. The height of the guardrail is equal to the diameter of the pipe.

[0030] The two sides of the inclined plate have guide plates, and the distance between the guide plates is the same as the length of the pipe, preventing the pipe from tilting at a large angle during rolling. The pipe in the feeder directly rolls onto the fixed seat, the top wall of the fixed seat is an inclined surface, so that the pipe entering the fixed seat from the inclined plate can automatically fill the blanking groove in the fixed seat, realizing automatic filling. The shape of the blanking groove is a vertical groove, which can prevent the pipe from being stuck in the blanking groove and ensure the smooth entry of the pipe into the blanking groove.

[0031] The height of the guardrail is equal to the diameter of the pipe, so that when the chute is filled, there is only one layer of pipe on the fixed seat, preventing the pipe from accumulating on one side of the fixed seat.

[0032] Preferably, the height of the front fixed seat is less than the height of the rear fixed seat.

[0033] When the steel pipe is placed horizontally, if the bending strain caused by its own weight is not corrected in time, it will cause permanent bending deformation of the steel pipe, because the load received by the steel pipe is dispersed along its entire length, and the material strength is not necessarily uniform, so small bending will occur in places with poor strength, gradually accumulating to cause bending deformation.

[0034] Moreover, when a steel pipe is placed at an angle, it is often supported in the inclined state, which can better maintain its geometric shape and reduce bending deformation. At the same time, the bending moment can be reduced in the inclined state, thereby reducing the stress on the pipe wall and making it less likely to bend.

[0035] Preferably, the rear fixed seat includes a bearing part and an adjusting part, a sliding cylinder is fixedly installed on the inner wall of the adjusting part, a gear two is rotatably installed in the sliding cylinder, a lead screw is rotatably installed in the adjusting part, the lead screw extends into the bearing part, a screw thread is formed in the bearing part and cooperates with the lead screw, a gear three is fixedly installed on the lead screw and cooperates with the gear two, and a fixed rack is fixedly installed on the side wall of the feeding plate and meshes with the gear two.

[0036] Due to production needs, the length of the feeding plate is often greater than the length of the cold-drawn pipe, and the fixed seat is slidingly installed on the feeding plate to adapt to the cold-drawing production of pipes of different lengths, avoiding the disassembly and replacement of a large number of parts, and adapting to various production scenarios.

[0037] In order to save materials, the side wall of the feeding plate is usually provided with a rectangular groove with the same length as the feeding plate, so that the distance between the two fixed blocks can be controlled by providing a sliding cylinder on the fixed seat.

[0038] Generally, when the steel pipe is stored at an angle, the preferred angle of inclination can reduce the bending stress on the steel pipe, reduce the risk of deformation of the pipe wall, and improve the stability of the entire structure. In practice, the angle of inclination is generally controlled between 10 degrees and 15 degrees. Therefore, by cooperating the gear two with the lead screw and other components, the height difference between the front fixed seat and the rear fixed seat can be adjusted while adjusting the position of the front fixed seat and the rear fixed seat. By accurately setting the lead screw pitch and the moving distance of the rear fixed seat, even after adjusting the distance between the two fixed seats, the pipe in the chute is still at an inclination angle of 5° to 15°, thereby maximizing the avoidance of bending of the pipe due to gravity.

[0039] Further, the lead screw has a lead of Where Δb is the moving distance of the rear fixed seat, n1 is the number of teeth of gear two, and n2 is the number of teeth of gear three.

[0040] Using inclined pipes can effectively resist bending deformation. However, the required inclination angle varies depending on the pipe length and material type. 10° is a moderate value that can meet the bending resistance requirements of most pipes under their own weight. Therefore, the lead of the lead screw is set to... Under this guide, when the rear fixed seat moves, the height raised by the bearing part can always maintain 10° with the angle of the front fixed seat, which can meet the needs of most pipes for anti-bending effect.

[0041] The derivation process is as follows: Since the moving distance of the rear fixed seat is determined by the length of the pipe, Δb is a fixed value. Therefore, the height raised by the bearing part is... Where Δb is the moving distance of the rear fixed seat, a is the initial height difference between the front and rear fixed seats, and b is the initial distance between the front and rear fixed seats. Furthermore,

[0042] And Δa = s × n, where s is the lead of the lead screw and n is the number of revolutions of the lead screw. n1 is the number of teeth in gear two, and n2 is the number of teeth in gear three.

[0043] Therefore, we can obtain

[0044] In summary, we can obtain

[0045] Preferably, the push plate has a guide groove.

[0046] The guide groove is V-shaped, with its apex aligned with the apex of the feeding groove on the same vertical line. Its width is greater than the diameter of the pipe. The pipe falls onto the push plate, and as the push plate moves backward, the pipe remains within the guide groove. This prevents the pipe from swinging to the side when the push plate moves, ensuring that the pipe falls precisely onto the feeding groove after the feeder is reset.

[0047] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0048] 1. One pipe is filled into each feeding trough at a time. The limiting unit filters the number of pipes in the dropping trough, so that after the pusher resets, one pipe will fall into each dropping trough at the same time, realizing automatic synchronous filling of the feeding trough, reducing the use of manpower, lowering production costs, and the pusher can immediately start pushing after resetting, saving production time and improving production efficiency.

[0049] 2. The structure is simple and no power source is needed, saving cost. The limiting unit screens the pipe in the falling material groove through the cooperation of the gear and rack, uses the power in the pushing and resetting process of the pushing machine, first peels off a pipe from the falling material groove, and then delivers the peeled pipe to the feeding groove, that is, through the cooperation of the pushing machine and the limiting unit, the automatic feeding of the pipe is realized and the cost is saved.

[0050] 3. It can adapt to the production of pipe cold drawing with different lengths. The fixed seat is slidingly installed on the feeding plate to adjust the distance between the two fixed seats, and the height of the two fixed seats can be self-adaptively increased, so that the pipe is maintained in a certain angle of inclination state, and the bending resistance is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 It is the overall structural diagram of the application;

[0052] Figure 2 It is Figure 1 the enlarged view of the structure at C;

[0053] Figure 3 It is Figure 1 the A-A sectional view of the application;

[0054] Figure 4 It is Figure 3 the enlarged view of the structure at D;

[0055] Figure 5 It is the structure diagram of the taking unit;

[0056] Figure 6 It is Figure 1 the B-B sectional view of the application;

[0057] Figure 7 It is Figure 6 the enlarged view of the structure at F;

[0058] Figure 8 It is Figure 6 the E-E sectional view of the application.

[0059] In the figure: 1, conversion station; 2, support; 3, feeding plate; 301, feeding groove; 4, pushing machine; 401, pushing plate; 402, pushing block; 5, fixed seat; 501, front fixed seat; 502, rear fixed seat; 503, upper rack; 504, lower rack; 505, gear one; 506, release block; 507, clamping block; 508, inclined chute; 509, falling material groove; 510, guide groove; 511, sliding cylinder; 512, spring; 5011, bearing part; 5012, adjusting part; 5013, screw; 5014, gear three; 5015, gear two; 5016, fixed rack; 6, guardrail; 7, sliding block; 8, sliding groove. DETAILED DESCRIPTION

[0060] Aspects and features of the present disclosure, and methods for implementing the aspects and features, will be apparent from the following disclosure, however, the disclosure is not limited to the embodiments disclosed, and can be implemented in various forms. The present embodiments are provided to help those of ordinary skill in the art fully understand the present disclosure, and the present disclosure is only limited in the scope of the appended claims.

[0061] Please refer to Figures 1 to 8 The present application provides a feeding device for a hardware cold drawing machine, and the technical scheme is as follows:

[0062] The diameter of the pipe is 4 cm, and the length is 2 m. Two fixed seats 5 are installed on the feeding plate 3 through sliding rails, which are respectively front fixed seat 501 and rear fixed seat 502. Three blanking grooves 509 are formed in each fixed seat 5. The width of the blanking groove 509 is 4 cm. The three blanking grooves 509 correspond to the feeding grooves 301 on the feeding plate 3 one by one. A gear one 505 is rotatably installed in each blanking groove 509. Two sliding grooves 8 extend into each blanking groove 509. An upper rack 503 and a lower rack 504 are slidingly installed in the blanking groove 509. A release block 506 is embedded on the bottom of each lower rack 504. The upper rack 503 and the lower rack 504 are engaged with the gear one 505 and located on the upper and lower sides of the gear one 505. A sliding block 7 is embedded on the side wall of the upper rack 503 and the lower rack 504. The sliding block 7 is installed in the sliding groove 8, so that the upper rack 503 and the lower rack 504 can move along the sliding groove 8. The sliding groove 8 is blocked by a sealing block, so that the upper rack 503 and the lower rack 504 cannot be separated from the fixed seat 5. In the front fixed seat 501, the sliding block 7 of the lower rack 504 is loaded on the side away from the conversion station 1. In the rear fixed seat 502, the sliding block 7 of the lower rack 504 is loaded on the side close to the conversion station 1. An inclined chute 508 is formed on one side of the blanking groove 509. Two clamping blocks 507 are rotatably installed on the side wall of the blanking groove 509 close to the upper rack 503. The side wall close to the end face of the pipe of the clamping block 507 is inclined.

[0063] Before starting the cold drawing work, remove the blocking block in the feeding machine. The pipe on the inclined plate rolls onto the front fixed seat 501 and the rear fixed seat 502. The top wall of the fixed seat 5 is inclined, and the side away from the inclined plate is lower than the side close to the inclined plate. The pipe rolls on the fixed seat 5 to the lower part until the blanking groove 509 in the front fixed seat 501 and the rear fixed seat 502 is filled. At this time, the two ends of the pipe are located on the lower rack 504.

[0064] The cold-drawing machine is started, and the pushing machine 4 reciprocates on the feeding plate 3 to push the pipes in the feeding groove 301 into the conversion station 1. When the pushing plate 401 moves to the rear fixed seat 502, the slider 7 on the lower rack 504 is arranged close to the conversion station 1, so that the lower rack 504 in the rear fixed seat 502 cannot be pushed forward by the pushing block 402. The pushing block 402 is installed on the pushing plate 401 through a torsion spring, and the pushing block 402 rotates clockwise around the hinge point at this time, so that the pushing plate 401 passes through the rear fixed seat 502.

[0065] When the pushing plate 401 moves to the bottom of the front fixed seat 501, the slider 7 on the lower rack 504 in the front fixed seat 501 is away from the conversion station 1. After the release block 506 on the bottom wall of the lower rack 504 contacts the pushing block 402, the lower rack 504 in the front fixed seat 501 moves forward, and the upper rack 503 moves backward. The clamping block 507 on the side wall of the upper rack 503 contracts along the inclined groove 508, and divides the several pipes in the dropping groove 509 in the front fixed seat 501 into two parts. One pipe is below the upper rack 503, and the rest of the pipes are above the upper rack 503. At this time, the lower rack 504 is not bent to separate from the pipes, and with the continuous advancement of the pushing plate 401, the lower rack 504 separates from the pipes, and the pipes fall on the pushing plate 401. At this time, the pushing plate 401 continues to advance. When the slider 7 on the lower rack 504 moves to the end point of the sliding groove 8, the lower rack 504 cannot move, and the pushing block 402 on the pushing plate 401 rotates clockwise again, so that the pushing block 402 passes through the release block 506, and the pipes in the feeding groove 301 are completely sent into the conversion station 1.

[0066] When the pusher 402 contacts the release block 506 in the front fixed seat 501 again during the resetting of the pusher 4, the lower rack 504 in the front fixed seat 501 is pushed backward, and the upper rack 503 is moved forward, and the pipe falls on the lower rack 504 again. When the lower rack 504 cannot be moved backward any more, the pusher 402 rotates counterclockwise, and the push plate 401 passes through the front fixed seat 501. When the push plate 401 moves backward to the bottom of the rear fixed seat 502, the pusher 402 contacts the release block 506, and pushes the lower rack 504 in the rear fixed seat 502 backward. At this time, the clamping block 507 of the upper rack 503 also divides the pipe in the material falling groove 509 into two parts. When the lower rack 504 in the rear fixed seat 502 moves backward and is completely separated from the pipe, when the lower rack 504 cannot be moved backward any more, the pusher 402 rotates counterclockwise, so that the push plate 401 is completely located behind the material falling groove 509, and the pipe falls in the feeding groove 301 of the feeding plate 3, and the three feeding grooves 301 are automatically filled with pipes. At this time, the feeding machine moves forward again, the pusher 402 contacts the release block 506 of the rear fixed seat 502, the lower rack 504 moves forward, and the upper rack 503 moves backward, and the pipe falls on the lower rack 504. When the feeding machine moves forward, the movement process of each part is the same as described above, and will not be described again.

[0067] When the pipe with a length of 3m is produced, the initial position of the feeding machine is adjusted, the moving distance of the feeding machine can be set in advance, the position of the front fixed seat 501 is kept unchanged, the guard rail 6 on the fixed seat 5 is detachable, the horizontally arranged guard rail 6 is removed, the rear fixed seat 502 is moved backward by 1m, and a guard plate is fixed between the front fixed seat 501 and the rear fixed seat 502, and the original guard rail 6 is filled up.

[0068] In addition, in the above, the two end faces of the gear one 505 are parallel to the side wall of the material falling groove 509, the movement direction of the upper rack 503 and the lower rack 504 is the front-back direction, the pipe can be pushed into the conversion station 1 by the pushing device, the power source drives the two racks to move, and the stacked pipes are separated by the taking device.

[0069] Alternatively, the gear one 505 can be rotated by 90°, so that the end faces of the gear one 505 are perpendicular to the side wall of the material falling groove 509. At this time, the two racks cut into the pipe from the side of the pipe, so that the taking device is not needed, but an additional power source for driving the movement of the racks is needed, and a control unit is needed to cooperate with the pushing and resetting of the pusher 4. Compared with the setting in the present scheme, the pipe is separated by the two racks cutting from the side of the pipe, which is more stable, but the structure is more complex.

[0070] Finally, it should be noted that the above examples are only used to illustrate and facilitate the understanding of the technical solutions of the present application, and are not limiting; the technical solutions described in the above embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the inventive concept of the present application.

Claims

1. A feeding device for a cold drawing machine for hardware parts, comprising: The lower station includes a support (2), a feed plate (3), a feeding trough (301), a pusher (4), a pusher plate (401), and a conversion station (1). The support (2) is set on the ground, and the lower station is located below the support (2). The feed plate (3) is fixedly installed on the support (2). The feed plate (3) has three feeding troughs (301). The feed plate (3) is equipped with a pusher (4), and the pusher (4) is fixedly installed with a pusher plate (401). The characteristic feature is that a front fixed seat (501) is installed on the support (2) near the conversion station (1), and a front fixed seat (501) is installed on the support (2) away from the conversion station (1). The bracket (2) is equipped with a rear fixing seat (502). The front fixing seat (501) and the rear fixing seat (502) are each provided with three dropping slots (509). Each dropping slot (509) corresponds to a feeding slot (301). The pipe is stored in the dropping slot (509). The dropping slot (509) can accommodate a maximum of two pipes at a time in the height direction. The dropping slot (509) is provided with a limiting unit. The limiting unit uses the power of the pusher (4) to push the pipe out of the feeding slot (301) so that only one pipe falls into the feeding slot (301) at the same time. The limiting unit includes a gear (505) rotatably mounted in each material chute (509), the two end faces of which are parallel to the sidewalls of the material chute (509). Each material chute (509) has an upper rack (503) and a lower rack (504) slidably mounted therein, meshing with the gear (505). A slider (7) is mounted on the sidewalls of both the upper rack (503) and the lower rack (504). The front fixed seat (501) and the rear fixed seat (502) constitute a fixed seat (5) for fixing. The seat (5) has a groove (8) that cooperates with the slider (7). The tube to be dropped is stored on the lower rack (504). A release block (506) is fixedly installed at the bottom of the lower rack (504). A push block (402) that cooperates with the release block (506) is installed on the top wall of the push plate (401) with a torsion spring. A material picking unit is provided on the upper rack (503). The material picking unit is used to separate the tube in the dropping groove (509) so that there is only one tube between the upper rack (503) and the lower rack (504). The material handling unit includes an inclined groove (508) opened on the inner wall of the slide (8), a clamping block (507) is installed on the slider (7) through a dovetail groove, a spring (512) is provided between the slider (7) and the upper rack (503), and the side wall of the clamping block (507) near the end face of the pipe is inclined.

2. The feeding device for a cold drawing machine for hardware parts according to claim 1, characterized in that: The material drop chute (509) is a vertical chute, the top wall of the fixed seat (5) is an inclined surface, the side of the fixed seat (5) away from the feeder is lower than the side of the fixed seat (5) close to the feeder, and a guardrail (6) is fixedly installed on the top wall of the fixed seat (5), the height of the guardrail (6) is equal to the diameter of the pipe.

3. The feeding device for a cold drawing machine for hardware parts according to claim 1, characterized in that: The height of the front mounting bracket (501) is less than the height of the rear mounting bracket (502).

4. The feeding device for a cold drawing machine for hardware parts according to claim 1, characterized in that: The distance between the upper rack (503) and the lower rack (504) and the distance between the top wall of the lower rack (504) and the feeding groove (301) are and R < c < 1.5R, where l is the total length of the pipe, x is the length of the pipe located in the blanking chute (509), y is the distance from the bottom wall of the lower rack (504) to the feeding groove (301), c is the distance between the upper rack (503) and the lower rack (504), and R is the outer diameter of the pipe.

5. The feeding device for a cold drawing machine for hardware parts according to claim 3, characterized in that: The rear fixed seat (502) includes a bearing part (5011) and an adjusting part (5012). A sliding cylinder (511) is fixedly installed on the inner wall of the adjusting part (5012). A gear two (5015) is rotatably installed in the sliding cylinder (511). A lead screw (5013) is rotatably installed in the adjusting part (5012). The lead screw (5013) extends into the bearing part (5011). A thread that cooperates with the lead screw (5013) is opened in the bearing part (5011). A gear three (5014) that cooperates with the gear two (5015) is fixedly installed on the lead screw (5013). A fixed rack (5016) that meshes with the gear two (5015) is fixedly installed on the side wall of the feed plate (3).

6. The feeding device for a cold drawing machine for hardware parts according to claim 5, characterized in that: The lead of the lead screw (5013) is Where Δb is the moving distance of the rear fixed seat (502), n1 is the number of teeth of gear two (5015), and n2 is the number of teeth of gear three (5014).

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