Multifunctional full-automatic stretching device and control method thereof

Abstract

The invention discloses a multifunctional full-automatic stretching device and a control method thereof, the multifunctional full-automatic stretching device comprises a material storage device, a stretching device and a material taking device, and the material storage device has an automatic compensation function. When a sheet is sucked, a downward pressing cylinder presses a guide cylinder, the guide cylinder slides downwards along a sliding guide column, the guide column ascends to a guide inclined plane from a downward concave part at the bottom and is clamped at a downward concave part at the top, and in the process, a rotating column rotates under the guidance of the guide inclined plane to drive a rotating sleeve to rotate; the adjusting cylinder and the pedestal drive the pedestal to ascend for compensation under the action of threads, the guide column is clamped at the downward concave part of the top when compensation is completed, the time point is the time point of sheet suction, after suction is completed, downward pressure disappears, at the moment, the guide cylinder ascends under the action of an elastic spring, and the sheet is sucked. The guide column is separated from the downward concave part at the top, moves to the guide inclined surface at the bottom and continuously rotates under the action of elastic force, in the rotating process, the outer gear and the transmission gear are separated from meshing, the pedestal is located at the original height, after the rotating process is finished, the outer gear and the transmission gear are switched to be in a meshing state, and the steps are repeated, so that automatic compensation is realized when the sheets are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to a wheel hub manufacturing device, in particular to a multifunctional full-automatic stretching device and a control method thereof. BACKGROUND

[0002] In the manufacturing process of the wheel spoke, a stretching device is needed to stretch the sheet.

[0003] At present, the feeding during stretching is often carried out by using a pneumatic suction cup. When the suction cup is used for suction, the lifting amplitude of the stretching station is certain, and the lifting amplitude at this place will gradually increase with the suction of the stacked sheets. The existing technology often uses the following scheme to solve this problem: first, the first suction cup is independently arranged, and second, a spring support structure is arranged on the first suction cup to support the first suction cup. When pressed down, the first suction cup will contract to compensate.

[0004] The above method has two defects: 1. The spring support structure will change the spring force during the pressing process due to the change in the thickness of the sheet, which will affect the pressing force of the suction cup; 2. The upper limit of the structure is low, that is, the thickness of the sheet stack will affect the stroke of the first suction cup, causing the first suction cup and each suction cup in the stretching stage to be unable to be uniformly driven. If the driving is not uniform, it will lead to the need for two sets of power units and the need for controller to coordinate control, which will greatly increase the cost. SUMMARY

[0005] The present application aims to solve the problems mentioned in the background art. The technical problem to be solved by the present application is to provide a multifunctional full-automatic stretching device and a control method thereof.

[0006] The technical scheme adopted by the present application to solve the above technical problem is: The multifunctional full-automatic stretching device comprises: a storage device for storing sheets and automatically rising to compensate for the reduction in the thickness of the sheets when pressed; a stretching device comprising a lower machine table, a lifting guide column arranged on the lower machine table, an upper machine table vertically sliding with the lifting guide column, and a plurality of groups of stretching molds arranged on the machine table and the upper machine table, each group of molds being opposite to each other and being used for multi-stage stretching; a material taking device comprising a material taking frame that can be translated and lifted, and a plurality of material taking suction cups arranged on the material taking frame; wherein each group of molds is arranged at equal intervals and the number of groups of molds is one less than the number of groups of material taking suction cups, and each material taking suction cup is arranged at equal intervals and is arranged in a staggered manner with each group of molds when not in suction.

[0007] As a preferred embodiment, the storage device comprises: a storage machine table; An adjusting cylinder is rotatably arranged on the storage machine base and has an inner ring gear and an inner thread; A transmission gear is rotatably arranged on the storage machine base and is engaged with the inner ring gear; A rotating sleeve is rotatably arranged on the storage machine base and is located at the center of the adjusting cylinder, and has an outer gear with multiple sections of spaced outer teeth and is intermittently engaged with the transmission gear during rotation, and has a non-circular insertion hole at the top; A base seat includes an annular seat body and a threaded cylinder at the bottom of the annular seat body, and the annular seat body is provided with vertically extending sliding guide columns, and the guide columns have limiting nuts, and the threaded cylinder has an outer thread and is threadedly connected with the adjusting cylinder; A guide cylinder has a side wall with an annularly extending guide opening, and the guide opening has a plurality of alternating convex portions and concave portions at the top and bottom, and the concave portion at the top and the convex portion at the bottom are arranged in a staggered manner, and the convex portion at the top and the concave portion at the bottom are arranged in a staggered manner, and the convex portions and the concave portions adjacent in the circumferential direction are transitioned by guide slopes; A resilient spring is sleeved on the sliding guide column and abuts against the base seat and the guide cylinder at both ends to apply an upward resilient force to the guide cylinder to move the guide cylinder upward in a natural state and abut against the limiting nut; A rotating column is rotatably arranged inside the guide cylinder, and the bottom penetrates through the base seat and is inserted into the insertion hole and abuts against the side wall of the insertion hole, and at least one guide column is arranged at the side wall of the rotating column and extends into the guide opening, and the height of the top of the rotating column is lower than the height of the top of the guide cylinder, and the sheet is placed on the top of the rotating column and is limited inside by the guide cylinder; The first material taking suction cup has a pressing cylinder for pressing the guide cylinder, and when the sheet is sucked, the pressing cylinder presses the guide cylinder, the guide cylinder slides downward along the sliding guide column, the guide column rises from the concave portion at the bottom to the guide slope and is clamped at the concave portion at the top in the process, and in this process, the rotating column rotates under the guidance of the guide slope, drives the rotating sleeve to rotate, and drives the transmission gear and the adjusting cylinder to rotate, the adjusting cylinder and the base seat drive the base seat to rise for compensation under the action of the thread, and when the compensation is completed, the guide column is clamped at the concave portion at the top, and this time point is also the time point of sucking the sheet, and after the sucking is completed, the pressing force disappears, and at this time, the guide cylinder rises under the action of the resilient spring, the guide column is separated from the concave portion at the top and moves to the guide slope at the bottom, and continues to rotate under the action of the resilient force, and in this rotating process, the outer gear is disengaged from the transmission gear, the base seat is located at the original height, and after the rotating process is completed, the outer gear is switched to the engaged state with the transmission gear, and the cycle is repeated.

[0008] As preferred, the sliding guide posts are provided with two, the adjusting cylinder comprises an upper cylinder body and a lower cylinder body, the top side of the upper cylinder body is provided with an annular upper connecting disc, the side wall of the lower cylinder body is provided with an annular lower connecting disc, the upper connecting disc and the lower connecting disc are fixed as a whole through a screw rod and a nut; the sliding guide posts are provided with two and all penetrate through the upper connecting disc and the lower connecting disc, the sliding guide posts are alternated with the screw rod and are circularly arranged and distributed.

[0009] As preferred, a stand is further provided on the storage machine table, a reset motor is provided on the stand, a reset cylinder with teeth is provided on the output shaft of the reset motor, reset teeth are provided on the side wall of the lower connecting disc, the reset teeth are engaged with the reset cylinder, and when rising to the highest position, the reset motor drives the lower connecting disc in reverse, thereby driving the guide cylinder to reverse, until the pedestal is lowered to the initial position.

[0010] As preferred, the intermittent sections of the external gear and the rebound sections of the adjusting cylinder correspond in number and angle.

[0011] As preferred, the first end of the lower machine table is further provided with a temporary storage table, four positioning columns forming a rectangle are provided on the temporary storage table, two of the four positioning columns are driven to move horizontally through an extension cylinder, a cross-shaped placement plate is provided on the inner side of the four positioning columns, and a pressure sensor for detecting whether there is a sheet placed on the bottom of the placement plate; a material taking suction cup is additionally provided on the material taking frame for transferring the sheet on the temporary storage table.

[0012] As preferred, the material taking frame is provided with a lifting frame through a sliding rail and a sliding block, the lifting frame is sleeved on the two columns, the material taking frame and the lifting frame support can be driven to translate through the setting of a gear and rack mechanism and the cooperation of a driving motor, and the lifting frame is driven to lift through an extension cylinder.

[0013] As preferred, a bearing is provided between the pedestal and the rotating column.

[0014] As preferred, a discharging guide groove or a discharging conveyor is provided at the tail end of the lower machine table.

[0015] The control method of the multifunctional full-automatic stretching device is characterized in that, S1, position relationship control, each group of stretching molds is arranged at equal intervals, and each material taking suction cup is arranged at equal intervals and is arranged in a staggered manner with each group of stretching molds; S2, compensation rhythm control, the downward taking of the material is divided into three steps: downward pressing, material taking, and upward lifting, the transmission gear is engaged with the external gear during downward pressing, the material taking suction cup takes the material when the downward pressing is completed, and the transmission gear is disengaged from the external gear during upward lifting; S3, compensation height control, the height of the compensation is ensured to be the same as the thickness of the sheet during the downward pressing process of S2; S4, reset control, the pedestal is reset to the initial position through the reverse rotation of the reset motor by a set number of turns.

[0016] The guide cylinder is lifted up by the spring and the guide cylinder is disengaged from the top recess and moves to the guide slope at the bottom, and continues to rotate under the action of the elastic force. During the rotation process, the outer gear and the transmission gear are disengaged and the base is at the original height. After the rotation process is completed, the outer gear and the transmission gear are switched to the meshing state. This cycle is repeated to realize automatic compensation when the sheet is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are only drawn for the purpose of explaining the preferred embodiments and therefore should not be regarded as limiting the scope of the present invention. Furthermore, unless otherwise specified, the drawings only conceptually represent the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 This is the main view of this application; Figure 2 A perspective view of this application; Figure 3 It is a three-dimensional diagram of the reclaiming device; Figure 4 It is a three-dimensional diagram of the reclaiming device; Figure 5 It is a three-dimensional diagram of the storage device; Figure 6 This is an exploded view of the storage device; Figure 7 This is an exploded view of the storage device; Figure 8 is a cross-sectional view of the storage device; In the figure: 10, stretching device; 101, lower machine table; 102, upper machine table; 103, stretching mold; 30, storage device; 300, storage machine table; 301, guide cylinder; 3011, guide port; 30111, lower concave part; 30112, convex part; 30113, guide slope; 3012, upper connecting disc; 3013, lower connecting disc; 3014, screw rod; 3015, sliding guide column; 3016, stand; 302, pedestal; 3020, annular seat body; 3021, threaded cylinder; 303, adjusting cylinder; 3031, internal thread; 3032, internal gear ring; 304, rotating sleeve; 3041, external gear; 3042, insertion hole; 305, transmission gear; 306, rotating column; 3061, guide column; 3062, insertion head; 307, reset motor; 3071, reset cylinder; 40, material taking device; 401, lifting frame; 402, material taking frame; 403, sliding rail; 404, sliding block; 405, material taking suction cup; 406, pressing cylinder; 407, rack; 408, driving motor. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present application will be described in detail below with reference to the attached drawings, which should be considered in conjunction with the description below, and it will be appreciated by those skilled in the art that these descriptions are only illustrative and exemplary, and should not be construed as limiting the scope of protection of the present application.

[0020] It should be noted that similar reference numerals represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it can not be further defined and explained in subsequent drawings. EMBODIMENT

[0021] The present embodiment mainly describes the title of the multifunctional full-automatic stretching device and its control method, which is as follows: As shown in Figures 1-8 , the multifunctional full-automatic stretching device comprises: a storage device 30 for storing sheet materials and automatically rising to compensate for the thickness reduction of the taken sheet materials under pressure; a stretching device 10 comprising a lower machine table 101, a lifting guide column arranged on the lower machine table 101, an upper machine table 102 vertically slidingly matched with the lifting guide column, and a plurality of groups of stretching molds 103 arranged on the machine table and the upper machine table 102, each group of molds being oppositely arranged for multi-stage stretching; a material taking device 40 comprising a translatable and liftable material taking frame 402 and a plurality of material taking suction cups 405 arranged on the material taking frame 402; Among them, each group of molds are arranged at equal intervals and the number of groups of molds is one less than the number of groups of material taking suction cups 405, and each material taking suction cup 405 is arranged at equal intervals and is arranged out of position with each group of molds when not sucking.

[0022] As preferred, the storage device 30 comprises: a storage platform 300; an adjusting cylinder 303 rotatably arranged on the storage platform 300, which has an inner ring gear 3032 and an inner thread 3031; a transmission gear 305 rotatably arranged on the storage platform 300 and engaged with the inner ring gear 3032; a rotating sleeve 304 rotatably arranged on the storage platform 300 and located at the center of the adjusting cylinder 303, which has an outer gear 3041 with multiple sections of spaced outer teeth and intermittently engaged with the transmission gear 305 during rotation, and a non-circular insertion hole 3042 at the top thereof; a pedestal 302 comprising an annular seat body 3020 and a threaded cylinder 3021 at the bottom of the annular seat body 3020, the annular seat body 3020 is provided with vertically extending sliding guide posts 3015 with limiting nuts thereon, and the threaded cylinder 3021 has an outer thread and is threadedly connected with the adjusting cylinder 303; a guide cylinder 301, the sidewall of which has an annularly extending guide opening 3011, the guide opening 3011 has a plurality of alternating convex portions 30112 and concave portions 30111 at the top and the bottom, the concave portions 30111 at the top and the convex portions 30112 at the bottom are arranged in a staggered manner, and the convex portions 30112 at the top and the concave portions 30111 at the bottom are arranged in a staggered manner, and the convex portions 30112 and the concave portions 30111 between the circumferentially adjacent convex portions 30112 and the concave portions 30111 are transitioned by guide inclined surfaces 30113; a resilient spring, which is sleeved on the sliding guide post 3015 and has two ends respectively abutting against the pedestal 302 and the guide cylinder 301 to apply an upward resilient force to the guide cylinder 301 so that the guide cylinder 301 moves upward in a natural state and abuts against the limiting nut; a rotating column 306 rotatably arranged inside the guide cylinder 301, the bottom of which is an insertion head 3062 penetrating through the pedestal 302, the insertion head 3062 is inserted into the insertion hole 3042 and abuts against the sidewall of the insertion hole 3042, at least one guide column 3061 is arranged at the sidewall of the rotating column 3061, the guide column 3061 extends into the guide opening 3011, the height of the top of the rotating column 306 is lower than the height of the top of the guide cylinder 301, and the sheet is placed on the top of the rotating column 306 and is limited inside by the guide cylinder 301; The first material taking suction cup 405 has a lower pressing cylinder 406 which presses the guide cylinder 301, when taking the sheet, the lower pressing cylinder 406 presses the guide cylinder 301, the guide cylinder 301 slides downward along the sliding guide column 3015, the guide column 3061 rises from the bottom recessed part 30111 to the guide inclined surface 30113 and is clamped at the top recessed part 30111, in this process, the rotating column 306 rotates under the guidance of the guide inclined surface 30113, drives the rotating sleeve 304 to rotate, thereby driving the transmission gear 305 and the adjusting cylinder 303 to rotate, the adjusting cylinder 303 and the pedestal 302 drive the pedestal 302 to rise for compensation under the action of the thread, when the compensation is completed, the guide column 3061 is clamped at the top recessed part 30111, and the time point is also the time point of taking the sheet, after taking, the pressing force disappears, at this time, the guide cylinder 301 rises under the action of the elastic spring, the guide column 3061 is separated from the top recessed part 30111 and moves to the bottom guide inclined surface 30113, and continues to rotate under the action of the elastic force, in the rotating process, the outer gear 3041 is disengaged from the transmission gear 305, and the pedestal 302 is located at the original height, after the rotating process is completed, the outer gear 3041 is switched to the meshing state with the transmission gear 305, and the cycle is repeated.

[0023] As preferred, the sliding guide column 3015 is provided with two, the adjusting cylinder 303 includes an upper cylinder body and a lower cylinder body, the top side of the upper cylinder body is provided with an annular upper connecting disc 3012, the side wall of the lower cylinder body is provided with an annular lower connecting disc 3013, the upper connecting disc 3012 and the lower connecting disc 3013 are fixed as a whole by a screw rod 3014 and a nut, the sliding guide column 3015 is provided with two and penetrates the upper connecting disc 3012 and the lower connecting disc 3013, and the sliding guide column 3015 is alternately distributed in a circular array with the screw rod 3014.

[0024] As preferred, the storage machine table 300 is further provided with a stand 3016, the stand 3016 is provided with a reset motor 307, the output shaft of the reset motor 307 is provided with a reset cylinder 3071 with teeth, the side wall of the lower connecting disc 3013 is provided with a reset tooth, the reset tooth is meshed with the reset cylinder 3071, and when rising to the highest position, the reset motor 307 drives the lower connecting disc 3013 in reverse, thereby driving the guide cylinder 301 to reverse, until the pedestal 302 descends to the initial position.

[0025] As preferred, the intermittent section of the outer gear 3041 and the rebound section of the adjusting cylinder 303 correspond one by one in quantity and angle. After one-to-one correspondence, it can be guaranteed that each time the lower pressing is performed, the rising compensation can be performed, and when the elastic return is performed, the rising compensation is not performed, because the force required in the compensation process is larger, and the force provided by the elastic spring cannot support the compensation.

[0026] As preferred, the head end of the lower machine table 101 is also provided with a temporary storage table, which is provided with four positioning columns forming a rectangle, two of which are driven to move horizontally by telescopic cylinders, and the inside of the four positioning columns is provided with a cross-shaped placement plate, and the bottom of the placement plate is provided with a pressure sensor for detecting whether there is a sheet placed.

[0027] As preferred, the material taking frame 402 is provided with a lifting frame 401 through a sliding rail 403 and a sliding block 404, the lifting frame 401 is sleeved on two columns, the material taking frame 402 and the lifting frame 401 support can be driven to translate by setting a gear and rack mechanism and cooperating with a driving motor 408, and the lifting frame 401 is driven to lift by a telescopic cylinder. The rack 407 is arranged on the material taking frame 402, and the driving motor 408 is arranged on the lifting frame 401, and the output end of the driving motor 408 is provided with a gear engaged with the rack 407.

[0028] As preferred, a bearing is arranged between the pedestal 302 and the rotating column 306. The bearing can ensure the position degree between the rotating column 306 and the guide cylinder 301.

[0029] As preferred, the tail end of the lower machine table 101 is provided with a discharging guide groove or a discharging conveyor. The discharging guide groove or the discharging conveyor is arranged to enable the last suction disc to suck the finished workpiece and place it on the discharging guide groove or the discharging conveyor for unified conveying.

[0030] Control method of multifunctional full-automatic stretching device, S1, position relationship control, each group of stretching molds 103 are arranged at equal intervals, and each material taking suction disc 405 is arranged at equal intervals and is arranged in a staggered manner with each group of stretching molds 103; S2, compensation rhythm control, the downward taking of the material is divided into three steps: downward pressing, material taking and upward lifting, the transmission gear 305 is engaged with the outer gear 3041 during downward pressing, the material taking suction disc 405 sucks the material during downward pressing, and the transmission gear 305 is disengaged from the outer gear 3041 during upward lifting; S3, compensation height control, during the downward pressing process of S2, the compensation height is ensured to be the same as the thickness of the sheet; S4, reset control, the pedestal 302 is reset to the initial position by the reverse rotation of the reset motor 307 by a set number of turns.

[0031] In the description of the application, it should be noted that the terms "upper", "lower", "front", "back", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the application is used, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

Claims

1. Multifunctional fully automatic stretching device, characterized by: include: A storage device for storing sheets and automatically rising when pressed to compensate for the reduced thickness of the removed sheets; The stretching device includes a lower platform, a lifting guide column arranged on the lower platform, an upper platform vertically slidingly matched with the lifting guide column, and a plurality of sets of stretching dies arranged on the platform and the upper platform, each set of dies facing each other up and down and used for multi-stage stretching; The material taking device comprises a material taking frame which can be moved horizontally and lifted and a plurality of material taking suction cups arranged on the material taking frame; The groups of molds are arranged at equal intervals and the number of groups of molds is one less than the number of groups of material-retrieving suction cups. The material-retrieving suction cups are arranged at equal intervals and are staggered with the groups of molds when not absorbing.

2. The multifunctional fully automatic stretching device according to claim 1, characterized in that: The storage device includes: Storage machine; An adjusting cylinder is rotatably mounted on the material storage machine platform and has an inner gear ring and an inner thread; A transmission gear is rotatably mounted on the accumulator table and meshes with the inner gear ring; The rotating sleeve is rotatably mounted on the material storage machine and is located at the center of the adjusting cylinder. The rotating sleeve has an external gear with multiple-stage spaced external teeth and is intermittently meshed with the transmission gear during rotation. A non-circular socket is provided on the top of the rotating sleeve. The pedestal comprises an annular base and a threaded barrel located at the bottom of the annular base. The annular base is provided with a vertically extending sliding guide post, the guide post is provided with a limit nut, and the threaded barrel has an external thread and is threadedly connected to the adjustment barrel. The guide cylinder has a side wall with an annularly extending guide opening, the guide opening having a plurality of alternating raised portions and recessed portions at the top and bottom, the recessed portions at the top and the raised portions at the bottom being staggered, and the raised portions at the top and the recessed portions at the bottom being staggered, with circumferentially adjacent raised portions and recessed portions transitioned by guide slopes; An elastic spring is sleeved on the sliding guide post and has two ends respectively abutting against the pedestal and the guide cylinder to exert an upward elastic force on the guide cylinder so that the guide cylinder moves upward in a natural state and abuts against the limit nut; The rotating column is rotatably arranged inside the guide cylinder, and its bottom passes through the base and is inserted into the socket and fits into the side wall of the socket. At least one guide column is provided on the side wall, and the guide column extends into the guide opening. The height of the top of the rotating column is lower than the height of the top of the guide cylinder. The sheet is placed on the top of the rotating column and is confined inside by the guide cylinder. The first material picking suction cup has a pressing cylinder that presses down the guide cylinder. When sucking the sheet, the pressing cylinder presses the guide cylinder, and the guide cylinder slides downward along the sliding guide column, and the guide column rises from the lower recess at the bottom to the guide inclined surface and is stuck in the lower recess at the top. In this process, the rotating column rotates under the guidance of the guide inclined surface, driving the rotating sleeve to rotate, thereby driving the transmission gear and the adjusting cylinder to rotate. The adjusting cylinder and the pedestal drive the pedestal to rise for compensation under the action of the thread. When the compensation is completed, the guide column is stuck in the lower recess at the top. This time point is also the time point of sucking the sheet. After the suction is completed, the downward pressure disappears. At this time, the guide cylinder rises under the action of the elastic spring, and the guide column disengages from the lower recess at the top and moves to the guide inclined surface at the bottom, and continues to rotate under the action of the elastic force. During this rotation process, the outer gear and the transmission gear disengage, and the pedestal is at its original height. After the rotation process is completed, the outer gear and the transmission gear switch to the meshing state, and the cycle is repeated.

3. The multifunctional fully automatic stretching device according to claim 2, characterized in that: There are two sliding guide pillars, and the adjusting cylinder includes an upper cylinder and a lower cylinder. An annular upper connecting plate is provided on the top side of the upper cylinder, and an annular lower connecting plate is provided on the side wall of the lower cylinder. The upper connecting plate and the lower connecting plate are fixed as a whole by screws and nuts; there are two sliding guide pillars and both pass through the upper connecting plate and the lower connecting plate. The sliding guide pillars and the screws are alternated and evenly distributed in a circular array.

4. The multifunctional fully automatic stretching device according to claim 3, characterized in that: The storage machine platform is also provided with a vertical frame, on which a reset motor is provided, and an output shaft of the reset motor is provided with a reset cylinder with teeth, and the side wall of the lower connecting plate is provided with reset teeth, which engage with the reset cylinder. When it rises to the highest position, the reset motor drives the lower connecting plate in reverse, thereby driving the guide cylinder to reverse until the base drops to its initial position.

5. The multifunctional fully automatic stretching device according to claim 2, characterized in that: The intermittent sections of the external gear correspond to the rebound sections of the regulating cylinder in terms of number and angle.

6. The multifunctional fully automatic stretching device according to claim 1, characterized in that: There is also a temporary storage table at the head end of the lower machine. There are four rectangular positioning columns on the temporary storage table. Two of the positioning columns are driven horizontally by telescopic cylinders. A cross-shaped placement plate is provided on the inner side of the four positioning guide columns. A pressure sensor is provided at the bottom of the placement plate for detecting whether there is a sheet placed. A material suction cup is added to the material picking rack for transferring the sheets on the temporary storage table.

7. The multifunctional fully automatic stretching device according to claim 1, characterized in that: The material reclaimer is provided with a lifting frame through a slide rail and a slider. The lifting frame is sleeved on two columns. The material reclaimer and the lifting frame bracket can be translated by setting a gear rack mechanism and cooperating with a drive motor. The lifting frame is driven up and down by a telescopic cylinder.

8. The multifunctional fully automatic stretching device according to claim 2, characterized in that: A bearing is provided between the pedestal and the rotating column.

9. The multifunctional fully automatic stretching device according to claim 1, characterized in that: A material unloading guide trough or a material unloading conveyor is provided at the tail end of the unloading platform.

10. A control method for a multifunctional fully automatic stretching device, which is performed on the multifunctional fully automatic stretching device according to any one of claims 2 to 5, characterized in that: S1, position relationship control, setting the spacing between each group of stretching dies at equal intervals, and setting the material suction cups at equal intervals and staggered between each group of stretching dies; S2, compensation rhythm control, divides the pressing and picking up materials into three steps: pressing down, picking up materials and rising. When pressing down, the transmission gear is ensured to be engaged with the external gear. When pressing down is completed, the picking up suction cup sucks up the materials. When rising, the transmission gear is ensured to be disengaged from the external gear. S3, compensation height control, during the pressing process of S2, ensure that the compensation height is the same as the thickness of the sheet; S4, reset control, resets the pedestal to its initial position by resetting the motor to reverse the set number of revolutions.

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