Cutting control method for waste mulching film roll

Abstract

The invention discloses a waste mulching film roll cutting control method which is applied to a waste mulching film roll cutting machine, the cutting machine comprises a mulching film roll pushing mechanism, a cutting mechanism and a detection system, the mulching film roll pushing mechanism comprises a chain and a plurality of cross rods installed on the chain, and push plates are fixed to the cross rods; the cutting mechanism comprises a cutting knife, a motor and a lifting driving unit; the detection system comprises a position sensor; the method comprises the following steps: acquiring position data of a cross rod on a chain through a position sensor; based on the position data, the lifting driving unit is controlled to operate so that the height of the cutting knife can change regularly. By monitoring the cutting torque, on one hand, the feeding speed can be increased when the cutting torque is low, the cutting speed of the waste mulching film roll can be increased, and on the other hand, the feeding speed can be reduced when the cutting torque is high, so that cutting safety is guaranteed. On the other hand, the situation that hard sundries exist in the mulching film roll, and consequently cutting torque rises instantly can be prevented, and shutdown protection can be conducted in time to prevent a cutting knife from being damaged.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural residual film cutting, and in particular to a cutting control method for a waste mulch film roll. Background Art

[0002] Ground film is a key covering material in northern my country's agriculture, and ground film covering cultivation technology has promoted the increase of agricultural output. However, the recycling and resource utilization of waste ground film has not been effectively solved, resulting in a large amount of residual film left in the fields, causing serious pollution to the environment and attracting great attention from the country. The recycled waste ground film is usually bulky, tangled together, and mixed with sand, soil, straw and other debris, which increases the difficulty of subsequent treatment and reduces the efficiency of residual film resource utilization. In order to improve the recycling efficiency of waste ground film, it needs to be cut in sections. However, existing cutting equipment is mostly used for cutting hard materials such as stone and metal, such as the cutting machine shown in patent CN108247857A. This type of cutting equipment is difficult to adapt to the continuous batch cutting needs of soft, irregular and easily deformed waste ground film rolls. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a cutting control method for a waste ground film roll that can adapt to the characteristics of the waste ground film roll and can effectively cut off the waste ground film roll.

[0004] Technical solution: To achieve the above-mentioned purpose, the waste ground film roll cutting control method of the present invention is applied to a waste ground film roll cutting machine, the waste ground film roll cutting machine includes a table, a ground film roll pushing mechanism, a cutting mechanism and a detection system, the table includes three parts of the table, two gaps are formed between the three parts of the table, the ground film roll pushing mechanism includes a chain and a plurality of cross bars equidistantly installed on the chain, a push plate is fixed on the cross bar, the number of chains is two groups, the upper half segments of the two groups of chains are respectively placed in the two gaps, and the cross bars on the upper half segments of each group of chains are supported by the table. During operation, the waste ground film roll to be cut is placed on the table and placed between two adjacent cross bars. When the cross bar moves with the chain, the push plate pushes the waste ground film roll to translate through the cutting knife; the cutting mechanism includes a cutting knife, a motor and a lifting drive unit that drives the lifting movement of the cutting knife. In this solution, the lifting drive unit is a cylinder; the detection system includes a position sensor;

[0005] The method comprises:

[0006] Acquiring position data of the crossbar on the chain through the position sensor;

[0007] Based on the position data, the lifting drive unit is controlled to operate so that the height of the cutting knife changes regularly; specifically, when the cross bar is placed directly below the cutting knife, the cutting knife as a whole is higher than the cross bar; when the front-to-back offset distance between the rotation axis of the cutting knife and the nearest cross bar is greater than a preset distance, the lowest point of the cutting knife is lower than the highest point of the cross bar.

[0008] Further, based on the position data, controlling the lifting drive unit to operate so that the height of the cutting knife changes regularly includes:

[0009] For each crossbar approaching the cutting knife, the previous crossbar passing directly below the cutting knife is used as the starting point for displacement calculation; when the displacement of the crossbar reaches a first distance, the lifting drive unit is controlled to operate to make the cutting knife move downward;

[0010] When the displacement of the crossbar is between the first distance and the second distance, the lowest point of the cutting knife has a moment lower than the highest point of the crossbar;

[0011] When the displacement of the cross bar reaches a second distance, the lifting drive unit is controlled to operate so that the cutting knife moves upward until the cutting knife is higher than the cross bar as a whole.

[0012] Further, a plurality of different target displacement values ​​are set between the first distance and the second distance; when the displacement of the cross bar is between the first distance and the second distance, the moment when the lowest point of the cutting knife is lower than the highest point of the cross bar specifically includes:

[0013] Whenever the displacement of the crossbar reaches a target displacement value, a preset instruction corresponding to the target displacement value is executed, wherein the preset instruction includes raising the cutting knife, lowering the cutting knife, and maintaining the height of the cutting knife unchanged. The preset instruction also includes the target height of the cutting knife.

[0014] The distance between two adjacent crossbars is the maximum displacement S of each crossbar. The preset instruction corresponding to the target displacement value less than S / 2 is to lower the cutting knife or maintain the height of the cutting knife unchanged. The preset instruction corresponding to the target displacement value greater than S / 2 is to raise the cutting knife or maintain the height of the cutting knife unchanged. In this way, the cutting knife can be gradually lowered in the first half of the stroke of the crossbar, and gradually raised in the second half, so that the control of the cutting knife is reasonable and the cutting effect is improved.

[0015] Furthermore, the position sensor is an inductive sensor, and a plurality of the position sensors are arranged in a linear array. When the crossbar approaches the lower part of the cutting knife, the crossbar passes through each position sensor in turn, and each position sensor generates a trigger signal in turn. The control system determines the target displacement value according to the number of the position sensor that generates the trigger signal, and executes a preset instruction corresponding to the target displacement value, so that the effect of the cutting knife gradually descending and then gradually rising can be achieved, and the control logic is simple and the control cost is low.

[0016] Furthermore, a torque sensor is provided in the transmission mechanism between the cutting knife and the motor; and the method further comprises:

[0017] Collecting cutting torque by means of the torque sensor;

[0018] Determining whether the cutting torque is within a preset torque range;

[0019] When the cutting torque is within the preset torque range, the feeding speed of the chain is adjusted based on the cutting torque; in specific implementation, the values ​​within the preset torque range can be segmented to form multiple torque intervals, each torque interval corresponding to a feeding speed. The larger the cutting torque, the slower the feeding speed.

[0020] When the cutting torque exceeds the preset torque range, the operation of the chain is stopped and the cutting knife is raised.

[0021] Beneficial effects: The cutting control method of the waste mulch film roll of the present invention has the following beneficial effects:

[0022] (1) The control method of the present invention can fully adapt to the irregular and easily deformed characteristics of the waste mulch roll, and can maximize the cutting feed depth of the cutter, so that the cutter can be fed to the bottom of the table to cut the waste mulch roll, and the cutter can avoid the cross bar in time, so that the waste mulch roll is fully cut off, avoiding that part of the mulch is still connected on both sides of the cutting part to affect subsequent processing, and preventing the cutter from colliding with the cross bar and causing damage to the cutter.

[0023] (2) By monitoring the cutting torque, on the one hand, the feed speed can be increased to increase the cutting speed of the waste film roll when the cutting torque is low, and the feed speed can be reduced to ensure cutting safety when the cutting torque is high. On the other hand, it can prevent the cutting torque from increasing suddenly due to hard debris in the film roll, and can stop the machine in time to prevent damage to the cutter. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural diagram of a waste mulch roll cutting machine;

[0025] Figure 2This is a front view structural diagram of a waste mulch roll cutting machine;

[0026] Figure 3 A state diagram for a state of a cutting machine;

[0027] Figure 4 A state diagram for another state of the cutting machine;

[0028] Figure 5 The figure is a flow chart of a cutting control method for waste mulch rolls;

[0029] Figure 6 It is a structural diagram of the crossbar in the preferred embodiment;

[0030] Figure 7 This is a state diagram of the cutting knife when it drops to a low position in a preferred embodiment.

[0031] In the figure: 1-chain; 2-crossbar; 3-lifting drive unit; 4-cutting knife; 5-push plate; 6-table; 7-position sensor; 8-motor; 9-torque sensor. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] like Figure 1 and Figure 2 The waste film roll cutting control method shown is applied to a waste film roll cutting machine, the waste film roll cutting machine includes a table 6, a film roll pushing mechanism, a cutting mechanism and a detection system, the table 6 includes three sub-tables, two gaps are formed between the three sub-tables, the film roll pushing mechanism includes a chain 1 and a plurality of cross bars 2 equidistantly installed on the chain 1, the number of the chain 1 is two groups, and each of the cross bars 2 is fixed with three push plates 5, left, middle and right; the upper half segments of the two groups of chains 1 are respectively placed in the two gaps, the cross bars 2 on the upper half segments of each group of chains 1 are supported by the table 6, and the push plates 5 on the cross bars 2 on the upper half segments are higher than the cross bars 2 on which they are located. The number of cutting mechanisms is also two groups, and the two groups of cutting mechanisms are respectively arranged corresponding to the two gaps.

[0034] During operation, the waste mulch roll to be cut is placed on the table 6 and placed between two adjacent cross bars 2. When the cross bar 2 moves with the chain 1, the push plate 5 pushes the waste mulch roll to move horizontally past the cutting knife 4; the cutting mechanism includes the cutting knife 4, the motor 8 and the lifting drive unit 3 for driving the lifting movement of the cutting knife 4. In this embodiment, the lifting drive unit 3 is an oil cylinder; the detection system includes a position sensor 7.

[0035] like Figure 5 As shown, the method includes the following steps S101-S102:

[0036] Step S101, obtaining position data of the crossbar 2 on the chain 1 through the position sensor 7;

[0037] Step S102, based on the position data, control the lifting drive unit 3 to operate so that the height of the cutting knife 4 changes regularly; specifically, when the cross bar 2 is placed directly below the cutting knife 4, the cutting knife 4 is higher than the cross bar 2 as a whole, such as Figure 3 When the rotation axis of the cutter 4 and the closest crossbar 2 are offset from each other by a distance greater than a preset distance, the lowest point of the cutter 4 is lower than the highest point of the crossbar 2, as shown in FIG. Figure 4 shown.

[0038] By adopting the above-mentioned control method, the cutting feed depth of the cutting knife 4 can be increased as much as possible, and the cutting knife can avoid the cross bar 2 in time, so that the waste mulch roll is fully cut off, avoiding that part of the mulch is still connected on both sides of the cutting part to affect subsequent processing, and preventing the cutting knife 4 from colliding with the cross bar 2 and causing damage to the cutting knife 4.

[0039] Preferably, in the above step S102, based on the position data, controlling the lifting drive unit 3 to operate so that the height of the cutting knife 4 changes regularly includes the following steps S201-S203:

[0040] Step S201, for each cross bar 2 approaching the cutting knife 4, the previous cross bar 2 passing directly below the cutting knife 4 is used as the starting point for displacement calculation; when the displacement of the cross bar 2 reaches a first distance, the lifting drive unit 3 is controlled to operate to make the cutting knife 4 move downward;

[0041] Step S202, when the displacement of the cross bar 2 is between the first distance and the second distance, the lowest point of the cutting knife 4 is lower than the highest point of the cross bar 2;

[0042] Step S203 , when the displacement of the cross bar 2 reaches a second distance, the lifting drive unit 3 is controlled to operate so that the cutting knife 4 moves upward until the cutting knife 4 is higher than the cross bar 2 as a whole.

[0043] Preferably, a plurality of different target displacement values ​​are set between the first distance and the second distance; the moment when the lowest point of the cutting knife 4 is lower than the highest point of the cross bar 2 when the displacement of the cross bar 2 is between the first distance and the second distance in the above step S202 specifically includes:

[0044] Whenever the displacement of the crossbar 2 reaches a target displacement value, a preset instruction corresponding to the target displacement value is executed, and the preset instruction includes raising the cutting knife 4, lowering the cutting knife 4, and maintaining the height of the cutting knife unchanged. The preset instruction also includes the target height of the cutting knife 4.

[0045] The distance between two adjacent crossbars 2 is the maximum displacement S of each crossbar 2. The preset instruction corresponding to the target displacement value less than S / 2 is to lower the cutting knife 4 or maintain the height of the cutting knife unchanged. The preset instruction corresponding to the target displacement value greater than S / 2 is to raise the cutting knife 4 or maintain the height of the cutting knife unchanged. The preset instruction corresponding to the target displacement value equal to S / 2 is to maintain the height of the cutting knife unchanged. In this way, the cutting knife 4 can be gradually lowered in the first half of the stroke of the crossbar 2, and the cutting knife 4 can be gradually raised in the second half, so that the control of the cutting knife 4 is reasonable and the cutting effect is improved.

[0046] Preferably, if Figure 6 As shown, the cross bar 2 includes an intermediate bar 22a and two end bars 22b located at both ends of the intermediate bar 22a. The intermediate bar 22a and each end bar 22b are connected by a U-shaped avoidance member 22c. When the cross bar 22 approaches the cutting knife 4, the top of the avoidance member 22c is located at a side away from the cutting knife 4 relative to the intermediate bar 22a. In this way, when the cutting operation is performed, when the pressure applied by the cutting knife 4 to the residual film roll makes the residual film roll abut against the corner between the table 6 and the push plate 5, as shown in FIG. Figure 7 As shown, the cutter 4 can be fed between the middle rod 22a and the end rod 22b to cut through the residual film roll to ensure that the residual film roll is completely cut off. In the process of cutting the residual film roll, the cutter 4 applies a downward pressure to the residual film roll and also applies a lateral thrust to the residual film roll, so that the residual film roll is against the push plate 5. When calculating the displacement of the cross bar 2, the position of the end rod 22b is determined according to the position sensor 7, and then the position determined by the position sensor 7 is compensated according to the offset distance between the end rod 22b and the bottom of the groove in the avoidance member 22c. The cutter 4 is controlled to move up and down according to the compensated position. In this way, the cutter 4 can partially enter the groove of the avoidance member 22c during the cutting process and avoid the bottom position of the groove of the avoidance member 22c.

[0047] Preferably, the position sensor 7 is an inductive sensor, and a plurality of the position sensors 7 are arranged in a linear array. When the crossbar 2 approaches the lower portion of the cutting knife 4, the crossbar 2 passes through each position sensor 7 in turn, and each position sensor 7 generates a trigger signal in turn. The control system determines the target displacement value according to the number of the position sensor 7 that generates the trigger signal, and executes a preset instruction corresponding to the target displacement value, so that the effect of the cutting knife 4 first gradually descending and then gradually rising can be achieved, and the control logic is simple and the control cost is low.

[0048] Preferably, a torque sensor 9 is provided in the transmission mechanism between the cutting knife 4 and the motor 8; the method further comprises the following steps S301-S304:

[0049] Step S301, collecting cutting torque through the torque sensor 9;

[0050] Step S302, determining whether the cutting torque is within a preset torque range;

[0051] Step S303, when the cutting torque is within the preset torque range, the feed speed of the chain 1 is adjusted based on the cutting torque; in specific implementation, the values ​​within the preset torque range can be segmented to form multiple torque intervals, each torque interval corresponding to a feed speed. The larger the cutting torque, the slower the feed speed.

[0052] Step S304: when the cutting torque exceeds the preset torque range, the operation of the chain 1 is stopped and the cutting knife 4 is raised.

[0053] By monitoring the cutting torque, on the one hand, the feed speed can be increased to increase the speed of cutting the waste film roll when the cutting torque is low, and the feed speed can be reduced to ensure cutting safety when the cutting torque is high. On the other hand, it can prevent the cutting torque from increasing suddenly due to hard debris in the film roll, and can stop the machine in time for protection to prevent the cutter 4 from being damaged.

[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A cutting control method for a waste mulch roll, which is applied to a waste mulch roll cutting machine, characterized in that: The waste mulch roll cutting machine comprises a mulch roll pushing mechanism, a cutting mechanism and a detection system, wherein the mulch roll pushing mechanism comprises a chain (1) and a plurality of cross bars (2) equidistantly mounted on the chain (1), and a push plate (5) is fixed on the cross bar (2); the cutting mechanism comprises a cutting knife (4), a motor (8) and a lifting drive unit (3) for driving the cutting knife (4) to move upward and downward; the detection system comprises a position sensor (7); The method comprises: Acquiring position data of the crossbar (2) on the chain (1) through the position sensor (7); Based on the position data, the lifting drive unit (3) is controlled to operate so that the height of the cutting knife (4) changes regularly; specifically, when the cross bar (2) is placed directly below the cutting knife (4), the cutting knife (4) is higher than the cross bar (2) as a whole; when the front-to-back offset distance between the rotation axis of the cutting knife (4) and the closest cross bar (2) is greater than a preset distance, the lowest point of the cutting knife (4) is lower than the highest point of the cross bar (2).

2. The cutting control method of waste mulch roll according to claim 1 is characterized in that: Based on the position data, controlling the lifting drive unit (3) to operate so that the height of the cutting knife (4) changes regularly comprises: For each cross bar (2) approaching the cutting knife (4), the point where the previous cross bar (2) passes directly below the cutting knife (4) is used as a starting point for displacement calculation; when the displacement of the cross bar (2) reaches a first distance, the lifting drive unit (3) is controlled to operate so that the cutting knife (4) moves downward; When the displacement of the cross bar (2) is between the first distance and the second distance, the lowest point of the cutting knife (4) is lower than the highest point of the cross bar (2); When the displacement of the cross bar (2) reaches a second distance, the lifting drive unit (3) is controlled to operate so that the cutting knife (4) moves upward until the cutting knife (4) is higher than the cross bar (2) as a whole.

3. The cutting control method of waste mulch roll according to claim 1 is characterized in that: A plurality of different target displacement values ​​are set between the first distance and the second distance; when the displacement of the cross bar (2) is between the first distance and the second distance, the moment when the lowest point of the cutting knife (4) is lower than the highest point of the cross bar (2) specifically includes: Whenever the displacement of the crossbar (2) reaches a target displacement value, a preset instruction corresponding to the target displacement value is executed, wherein the preset instruction includes raising the cutting knife (4), lowering the cutting knife (4) and maintaining the height of the cutting knife unchanged.

4. The cutting control method of waste mulch roll according to claim 1 is characterized in that: The position sensor (7) is an inductive sensor, and a plurality of the position sensors (7) are arranged in a linear array.

5. The cutting control method of waste mulch roll according to claim 1 is characterized in that: A torque sensor (9) is provided in the transmission mechanism between the cutting knife (4) and the motor (8); the method further comprises: collecting the cutting torque via the torque sensor (9); Determining whether the cutting torque is within a preset torque range; When the cutting torque is within a preset torque range, adjusting the feed speed of the chain (1) based on the cutting torque; When the cutting torque exceeds the preset torque range, the operation of the chain (1) is stopped and the cutting knife (4) is raised.

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