A specimen shear with a servo tail-pushing device and its control method

Abstract

The present invention discloses a specimen shear with a servo tail-pushing device and its control method, which includes a bracket, a tail-pushing mechanism and a sensor mechanism; the bracket is arranged at the inlet end of the specimen shear; the tail-pushing mechanism is arranged on the bracket and is connected to the PLC of the specimen shear; the sensor mechanism is arranged at the inlet end and the outlet end of the specimen shear for detecting the position of the steel plate. The present invention realizes the functions of precise sizing for end sampling and removing short-length steel plates at the tail from the lower shear blade table surface.

Description

Technical Field

[0001] The invention relates to shearing machine equipment, and more particularly to a sample shear with a servo tail pushing device and a control method thereof. Background Art

[0002] Conventional shearing machines use conveyor rollers or pinch rollers to feed steel plates into the shearing machine when shearing steel plates. However, after shearing the tail, a small section of steel plate may remain. At this time, the small section of steel plate that remains is completely separated from the conveyor roller or pinch roller. This small section of steel plate will stay on the lower shear blade. If it is not removed in time, the steel plates that are transported behind will be superimposed on this small section of steel plate, which will cause the accident of overlapping plate shearing. In another case, if the steel plate sampling position is at the rear end of the sample plate, the steel plate falls on the lower shear blade table, and the tail of the steel plate has left the conveyor roller. At this time, the steel plate can no longer be transported forward, because it needs to be sized according to the sample requirements, and the steel plate cannot be directly pushed out of the shear blade table. It needs to stop at any position according to the sizing requirements, so a device and intelligent control are needed to realize the above functions.

[0003] In existing patent applications, such as Chinese patent 201810823531.9, an integral tail-pushing device for rolling shears and a rolling shear are disclosed. The integral tail-pushing device for rolling shears includes a first lifting and pushing mechanism, a second lifting and pushing mechanism and a push plate. The first lifting and pushing mechanism and the second lifting and pushing mechanism are symmetrically arranged. The first lifting and pushing mechanism and the second lifting and pushing mechanism can move the push plate in the vertical direction, and the first lifting and pushing mechanism and the second lifting and pushing mechanism can also move the push plate in the horizontal direction. The integral tail-pushing device for rolling shears can ideally push irregular steel plate tails (regardless of the length and shape of the tail) away from the rolling shears at one time, avoiding the occurrence of uncertain faults such as steel jamming. The rolling shear has high overall working efficiency, stable and reliable performance.

[0004] The above technology pushes the steel plate away from the shearing machine by moving two lifting mechanisms. The structure is complex, but the thrust is large. One of the two lifting mechanisms drives the connecting rod to move, that is, the movement curve is an arc, not a straight line, so when pushing the tail, the front distance is not close to the bottom surface, but there is a certain gap. Some steel plates may not be pushed, and may ride on the top of the steel plate. It needs to be pushed repeatedly several times. Summary of the invention

[0005] In view of the above-mentioned defects existing in the prior art, the purpose of the present invention is to provide a sample shear with a servo tail pushing device and a control method thereof, so as to realize the functions of accurately sizing the tail end sampling and clearing the lower shear blade table of the short tail steel plate.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] On the one hand, a specimen shear with a servo tail-pushing device includes a bracket, a tail-pushing mechanism, and a sensor mechanism;

[0008] The bracket is arranged at the inlet end of the specimen shear;

[0009] The tail-pushing mechanism is arranged on the bracket and is connected to the PLC of the specimen shear;

[0010] The sensor mechanism is arranged at the inlet end and the outlet end of the specimen shear for detecting the position of the steel plate.

[0011] Preferably, the tail-pushing mechanism includes an upper fixing seat, a connecting rod structure, a lower swing seat, a support seat, a linear guide, a push rod, a push head, a first servo electric cylinder, and a second servo electric cylinder;

[0012] The upper fixing seat is arranged on the bracket;

[0013] One end of the connecting rod structure is connected to the upper fixing seat, and the other end is connected to the lower swing seat;

[0014] The support seat is arranged at the end of the bracket, the second servo electric cylinder is arranged on the support seat, and the piston of the second servo electric cylinder is connected to the lower swing seat;

[0015] The linear guide is arranged below the lower swing seat, the push rod is arranged on the linear guide, the first servo electric cylinder is arranged inside the lower swing seat, and the piston of the first servo electric cylinder is connected to the push rod;

[0016] The push head is arranged at the end of the push rod facing the specimen shear.

[0017] Preferably, the connecting rod structure includes a first connecting rod and a second connecting rod;

[0018] The upper ends of the first connecting rod and the second connecting rod are connected to the upper fixing seat, and the lower ends are connected to the lower swing seat.

[0019] Preferably, between the upper fixing seat, the connecting rod structure and the lower swing seat, between the piston of the second servo electric cylinder and the lower swing seat, between the piston of the first servo electric cylinder and the push rod, and between the push head and the push rod are all connected by pin shafts.

[0020] Preferably, the sensor mechanism includes a first laser sensor and a second laser sensor;

[0021] The first laser sensor is arranged on the bracket;

[0022] The second laser sensor is arranged on the sizing machine of the receiving table at the outlet end of the sample shear.

[0023] An adjusting bolt is provided on the pusher head.

[0024] On the other hand, a control method for a sample shear includes the following steps:

[0025] 1) Place the pusher tail mechanism in the sample shear in a waiting working state;

[0026] 2) When preparing to cut the last cut, start timing when the conveying roller table starts to operate, and determine whether the second laser sensor is triggered. If so, perform normal cutting. If not, go to step 3);

[0027] 3) Determine whether the timing is overdue. If so, go to step 4). If not, return to step 2)

[0028] 4) Determine whether the first laser sensor is in a zero state. If so, go to step 5). If not, give an alarm and wait for manual intervention;

[0029] 5) Start the pusher tail mechanism;

[0030] 6) Determine whether the steel plate has reached the sizing position. If so, retract the push rod and perform normal cutting. If not, return to step 5).

[0031] Preferably, in step 3), the formula for timing is the shearing sizing length / the linear speed of the conveying roller table operation.

[0032] Preferably, in step 5), starting the pusher tail mechanism specifically means:

[0033] The second servo electric cylinder extends to lower the push rod, and the first servo electric cylinder extends to push the steel plate forward by the pusher head until the second laser sensor is triggered. At this time, the first servo electric cylinder retracts, and after reaching the position, a command is sent to the sample shear. The sample shear performs normal cutting. After completion, the steel plate in the receiving table is grabbed. At this time, a command is sent to the pusher tail mechanism again. The pusher tail mechanism retracts and rises to return to the zero position and waits in the waiting state.

[0034] A sample shear with a servo pusher tail device and its control method provided by the present invention can easily push the last section of the sheared steel plate that falls on the lower shear blade onto the receiving device, and can also intelligently push the sample at the tail end of the sampling position to the required position for sizing and positioning, greatly reducing the labor intensity. Description of the Drawings

[0035] Figure 1 It is a schematic structural diagram of the sample shear of the present invention;

[0036] Figure 2 is Figure 1 the right view schematic diagram of

[0037] Figure 3 the schematic diagram of the downward movement of the tail-pushing mechanism in the specimen shear of the present invention;

[0038] Figure 4 is the schematic flow diagram of the control method of the specimen shear of the present invention. Detailed implementation manners

[0039] In order to better understand the above technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the drawings and embodiments.

[0040] In conjunction with Figures 1 to 3 as shown, a specimen shear with a servo tail-pushing device provided by the present invention includes a bracket 1, a tail-pushing mechanism and a sensor mechanism.

[0041] The bracket 1 is arranged on the entrance-end housing 2 of the specimen shear.

[0042] The tail-pushing mechanism is arranged on the bracket 1 and is connected to the PLC of the specimen shear.

[0043] The tail-pushing mechanism includes an upper fixed seat 3, a first connecting rod 4, a second connecting rod 5, a lower swing seat 6, a support seat 7, a linear guide 8, a push rod 9, a push head 10, a first servo electric cylinder 11 and a second servo electric cylinder 12.

[0044] The upper fixed seat is arranged on the bracket 1 through two pin shafts 13, 14.

[0045] The upper end of the first connecting rod 4 is connected to the pin shaft 13, and the lower end is connected to the lower swing seat 6 through the pin shaft 15. The upper end of the second connecting rod 5 is connected to the pin shaft 14, and the lower end is connected to the lower swing seat 6 through the pin shaft 16, forming a double-link mechanism.

[0046] The support seat 7 is arranged at the end of the bracket 1. The second servo electric cylinder 12 is arranged on the support seat 7. The piston of the second servo electric cylinder 12 is connected to the lower swing seat 6 through the pin shaft 16. Starting the telescoping of the second servo electric cylinder 12 can move the lower swing seat 6 up and down through the double-link mechanism. Because a servo electric cylinder is adopted, it can stay at any height and can be adjusted arbitrarily through the corresponding control program.

[0047] The linear guide 8 is arranged below the lower swing seat 6. The push rod 9 is fixedly arranged on the linear guide 8. The first servo electric cylinder 11 is arranged inside the lower swing seat 6. The piston of the first servo electric cylinder 11 is connected to the push rod 9 through the pin shaft 17. Starting the telescoping of the first servo electric cylinder 11 can move the push rod 9 horizontally. Because a servo electric cylinder is adopted, it can stay at any horizontal position.

[0048] The pusher head 10 is arranged at the end of the push rod 9 facing the direction of the sample shear through the pin shaft 18. Due to gravity, the head of the pusher head 10 is buckled downward, and the height position of the pusher head 10 can be adjusted by the adjusting bolt 19. When the push rod 9 is pushed forward, the position of the pusher head 10 can swing slightly up and down along with the surface of the conveying roller table 20 to ensure that the steel plate will not be inserted under the pusher head 10 when pushing the thin plate.

[0049] The sensor mechanism is arranged at the inlet end and the outlet end of the sample shear to detect the position of the steel plate.

[0050] The sensor mechanism includes a first laser sensor 21 and a second laser sensor 22. The first laser sensor 21 is arranged on the bracket 1, and the second laser sensor 22 is arranged on the length measuring machine 24 of the receiving table 23 at the outlet end of the sample shear.

[0051] Combined Figure 4 As shown, the present invention also provides a control method for a sample shear, including the following steps:

[0052] 1) Put the pusher tail mechanism in the sample shear in a waiting working state;

[0053] 2) When preparing to cut the last cut, start timing when the conveying roller table 20 starts to run, and judge whether the second laser sensor 22 is triggered. If so, cut normally; if not, enter step 3);

[0054] 3) Judge whether the timing is overtime. If so, enter step 4); if not, return to step 2)

[0055] 4) Judge whether the first laser sensor 21 is in a zero state (i.e., there is no steel plate). If so, enter step 5); if not, give an alarm and wait for manual intervention;

[0056] 5) Start the pusher tail mechanism, and judge whether the steel plate reaches the fixed length position. If so, cut normally; if not, continue to wait.

[0057] In step 3), the formula for timing is the shear fixed length / the linear speed of the conveying roller table running.

[0058] In step 5), starting the pusher tail mechanism specifically means:

[0059] The second servo electric cylinder 12 extends to lower the push rod 9, and the first servo electric cylinder 11 extends to make the pusher head 10 push the steel plate forward until the second laser sensor 22 is triggered. At this time, the first servo electric cylinder 11 retracts. After reaching the position, send a command to the sample shear, and the sample shear cuts normally. After completion, the steel plate in the receiving table 23 is grabbed. At this time, send a command to the pusher tail mechanism again, and the pusher tail mechanism retracts and rises to return to the zero position and waits in the waiting state.

[0060] Embodiment

[0061] The tail pushing mechanism is always in a waiting state for operation and is only awakened when the sample shear is about to cut the last cut. When preparing to cut the last cut, the conveying roller table 20 starts timing when it rotates. Is the second laser sensor 22 triggered (that is, whether the steel plate has moved to the fixed-length position)? If it is not triggered, does the timing exceed the time limit? The calculation formula for this timing is (the fixed-length of shearing / the linear speed of the conveying roller table). If the timing exceeds the limit, is the state of the first laser sensor 21 in the zero state (that is, there is no steel plate)? If there is a steel plate, an alarm is issued and manual intervention is required; if there is no steel plate, the tail pushing mechanism is started to work. The second servo electric cylinder 12 extends to lower the push rod 9, and the first servo electric cylinder 11 extends to push the steel plate forward until the second laser sensor 22 is triggered, that is, the steel plate reaches the fixed-length position. At this time, the first servo electric cylinder 11 retracts. After retracting to the position, it sends a command to the sample shear, and the sample shear cuts normally. After cutting is completed, the steel plate in the receiving table 23 is grabbed. At this time, a command is sent to the tail pushing mechanism, and the first servo electric cylinder 11 extends to push the tail waste to the receiving table 23 over the full stroke. The tail pushing mechanism retracts and rises to return to the zero position and waits in the standby state.

[0062] If when preparing to cut the last cut, the conveying roller table starts timing when it rotates, is the second laser sensor 22 triggered (that is, whether the steel plate has moved to the fixed-length position)? If it is triggered, the normal cutting is carried out. After cutting is completed, the steel plate in the receiving table 23 is grabbed. At this time, a command is sent to the tail pushing mechanism, and the first servo electric cylinder 11 extends to push the tail waste to the receiving table 23 over the full stroke. The tail pushing mechanism retracts and rises to return to the zero position and waits in the standby state.

[0063] Those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present invention and are not used to limit the present invention. As long as it is within the scope of the spirit of the present invention, changes and modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A specimen shear with a servo tail-pushing device, characterized in that: It includes a bracket, a tail-pushing mechanism and a sensor mechanism; The bracket is arranged at the inlet end of the sample shear; The tail-pushing mechanism is arranged on the bracket and is connected to the PLC of the sample shear; The sensor mechanism is arranged at the inlet end and the outlet end of the sample shear to detect the position of the steel plate. The tail-pushing mechanism includes an upper fixed seat, a connecting rod structure, a lower swing seat, a support seat, a linear guide, a push rod, a push head, a first servo electric cylinder and a second servo electric cylinder; The upper fixed seat is arranged on the bracket; An adjusting bolt is provided on the push head; One end of the connecting rod structure is connected to the upper fixed seat, and the other end is connected to the lower swing seat; The connecting rod structure includes a first connecting rod and a second connecting rod; The upper ends of the first connecting rod and the second connecting rod are connected to the upper fixed seat, and the lower ends are connected to the lower swing seat, forming a double connecting rod mechanism. The support seat is arranged at the end of the bracket, the second servo electric cylinder is arranged on the support seat, and the piston of the second servo electric cylinder is connected to the lower swing seat. By controlling the telescopic movement of the second servo electric cylinder, the lower swing seat is moved up and down through the double connecting rod mechanism and stays at any height; The linear guide is arranged below the lower swing seat, the push rod is arranged on the linear guide, the first servo electric cylinder is arranged inside the lower swing seat, and the piston of the first servo electric cylinder is connected to the push rod. By controlling the telescopic movement of the first servo electric cylinder, the push rod is moved horizontally and stays at any horizontal position; The push head is arranged at the end of the push rod facing the sample shear. Due to gravity, the head of the push head is buckled downwards, and the height position of the push head is adjusted by the adjusting bolt; when the push rod is pushed forward, the position of the push head swings slightly up and down along with the conveying roller table surface to ensure that the steel plate will not be inserted under the push head when pushing the thin plate. The sensor mechanism includes a first laser sensor and a second laser sensor; The first laser sensor is arranged on the bracket; The second laser sensor is arranged on the length measuring machine of the receiving table at the outlet end of the sample shear.

2. The specimen shear with a servo tail-pushing device according to claim 1, wherein: Between the upper fixed seat, the connecting rod structure and the lower swing seat, between the piston of the second servo electric cylinder and the lower swing seat, between the piston of the first servo electric cylinder and the push rod, and between the push head and the push rod are all connected by pin shafts.

3. A control method for a specimen shear, characterized in that, It includes the following steps: 1) Make the tail-pushing mechanism in the sample shear with a servo tail-pushing device as described in any one of claims 1-2 be in a waiting working state; 2) When preparing to cut the last cut, start timing when the conveying roller table runs, and judge whether the second laser sensor is triggered. If so, cut normally; if not, enter step 3); 3) Judge whether the timing is overtime. If so, enter step 4); if not, return to step 2); 4) Judge whether the first laser sensor is in a zero state. If so, enter step 5); if not, give an alarm and wait for manual intervention; 5) Start the tail-pushing mechanism to work; 6) Judge whether the steel plate has reached the fixed length position. If so, control the push rod to retract and cut normally; if not, return to step 5). In step 5), starting the tail-pushing mechanism specifically is: The second servo electric cylinder extends to lower the push rod, and the first servo electric cylinder extends to push the push head to move the steel plate forward until the second laser sensor is triggered. At this time, the first servo electric cylinder retracts, and after reaching the position, it sends a command to the sample shear. The sample shear shears normally. After completion, the steel plate in the receiving table is grabbed. At this time, a command is sent to the tail pushing mechanism again. The tail pushing mechanism retracts and rises to return to the zero position and is in a waiting state.

4. The control method of the specimen shear according to claim 3, characterized in that: In the step 3), the formula for timing is the shearing fixed length / the linear speed of the conveying roller table operation.

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