A fixed-length feeding device for materials and a control method thereof

Abstract

The present invention discloses a fixed-length feeding device for materials and a control method thereof. The fixed-length feeding device includes a fixed-length device, a secondary fixed-length device and a picking device. The fixed-length device is arranged on the output side of the cutting device and is provided with a first position detection component; the secondary fixed-length device is provided with a second position detection component; the conveying line is provided with a picking position, the picking device is provided above the picking position, the picking device includes a transverse track and a suction mechanism slidingly arranged on the transverse track, the transverse track is consistent with the material conveying direction, and the suction mechanism is provided with a liftable suction component. According to the present invention, the length of the material can be corrected within two distances before the tail of the material reaches the picking position and before reaching the upper drum position, and dynamic adjustment is supported; after the head or tail of the material reaches the picking position, the suction component falls and absorbs the material, and the material does not leave the conveyor belt, and moves to the upper drum position under the joint positioning of the conveyor belt and the suction component. The speed of the head of the material and the tail of the material after the drum is controllable, effectively ensuring the overlap accuracy of the head of the material and the tail of the material.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic feeding, and in particular to a fixed-length feeding device for materials and a control method thereof. Background Art

[0002] During the tire building process, various raw materials are first processed into materials, and subsequent processing often involves laminating the various materials. With increasing automation, automated feeding and laminating are increasingly in line with the need for improved overall machine efficiency. Due to the material's inherent physical properties, such as elasticity, it may not fully adhere to the conveyor belt, causing stretching or shortening during conveyance. Therefore, existing solutions to compensate for material length errors involve controlling the ratio of the conveying speed to the laminating speed after the beginning of the material to be laminated is placed on the drum, until the tail of the material is laminated.

[0003] However, during the lamination process, the head and rear portion of the material are laminarized on the drum, while the tail is still being conveyed and moves with the conveyor belt, in a free state. This makes precision control difficult and occasionally requires manual intervention. For example, in the technical solution of the "shoulder pad feeding device" provided by Chinese invention patent CN107089021B, the second transmission mechanism 3 feeds the cut shoulder pad. That is, under the action of the mobile drive mechanism 8, the mobile frame 7 extends and moves on the frame 1, transporting the shoulder pad in the second transmission mechanism 3 to the designated position; when the shoulder pad feeding on the second transmission mechanism 3 is completed, the mobile frame 7 is reset. For example, in the technical solution of "A device for automatically cutting and laminating wire bead wraps to a fixed length" provided by Chinese invention patent CN113696530B, the wire bead wraps on the first conveying mechanism are cut by a cutting device according to a preset wire bead wrap length. Then, the telescopic cylinder 30 is extended to push the conveying bracket 29 to slide until the head of the wire bead wrap on the second conveying mechanism moves to the tire drum. The pressing cylinder 38 is then activated to drive the rubber pressure roller 37 to press down and laminar the wire bead wrap. It can be seen that in the prior art, the materials are generally aligned at the upper drum position, but in the subsequent laminating process, the conveying accuracy of the conveyor belt is relied upon to achieve automatic laminating. However, the overlap accuracy of the head and tail of the material is very critical to the physical parameters of the tire, so there will still be laminating errors that affect tire performance.

[0004] It can be seen from this that the existing material feeding device has inconsistent conveying accuracy between the material head and the material tail, which easily leads to the problem of fitting error. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the current fixed-length material feeding device has inconsistent conveying accuracy between the material head and the material tail, which easily leads to fitting errors.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is to provide a fixed-length feeding device for materials, including a conveyor line and a loading position, a cutting device and a drum position arranged on the conveyor line, the conveyor line is provided with a conveyor belt, and the fixed-length feeding device further includes:

[0007] A length fixing device is provided on the output side of the cutting device, and the length fixing device is provided with a first position detecting member;

[0008] A secondary length fixing device is provided with a second position detecting member; and

[0009] The material taking device is provided with a material taking position on the conveyor line, and the material taking device is provided above the conveyor belt. The material taking device includes a transverse track and a suction mechanism slidably provided on the transverse track, and the transverse track is consistent with the material conveying direction. The suction mechanism is provided with a liftable suction member, and the suction member is provided with a push-out cylinder and a suction cup. The push-out end of the push-out cylinder is provided with a square frame, and the width of the square frame is consistent with the width of the conveyor belt; the suction cup is independently provided in the square frame, and the height of the suction cup is set as follows: when the push-out end of the push-out cylinder is retracted, the suction cup is lower than the square frame; when the push-out end of the push-out cylinder is actuated, the square frame descends and is lower than the suction cup;

[0010] The material is cut by the cutting device to form a tail, and the head or tail of the material passes through the fixed length device and the secondary fixed length device. The first position detection part and the second position detection part issue prompts and record the moving distance of the conveyor belt respectively. After the head of the material is put on the drum, at least two measured material lengths are obtained according to the moving distances of multiple conveyor belts. The ratio of the conveying speed of the conveyor belt and the tire drum fitting speed is adjusted to make the measured material length consistent with the predetermined material length. The head or tail of the material reaches the material picking position, the suction part falls, and the suction cup absorbs the head or tail of the material. The material moves to the upper drum position along with the conveyor belt and the suction mechanism. The pushing end of the pushing cylinder moves, and the square frame pushes the head or tail of the material out so that it fits on the tire drum.

[0011] In a preferred embodiment, the suction mechanism is provided with:

[0012] Vertical guide rails,

[0013] a telescopic cylinder, slidably mounted on the vertical guide rail, the telescopic cylinder being provided with a telescopic rod; and

[0014] The suction member is connected to the telescopic rod.

[0015] Furthermore, in the above embodiment, the telescopic rod is arranged on the vertical guide rail through a guide rail lock, and is configured as follows:

[0016] The telescopic rod is retracted, and the suction member is in a waiting position;

[0017] The telescopic rod is extended to a predetermined length, the guide rail lock is actuated to lock the telescopic rod, and the suction member is in the suction position;

[0018] The telescopic rod is fully extended and the suction member is in the upper bulge position.

[0019] Alternatively, in the above embodiment, the suction mechanism includes:

[0020] a translation guide rail, provided on a side of the telescopic rod facing away from the vertical guide rail, the translation guide rail being perpendicular to a material conveying direction; and

[0021] The driving member is arranged on the translation guide rail, and the two suction members are arranged as two. The driving member drives the two suction members to translate toward or away from each other along the translation guide rail through the left and right rotating screws.

[0022] In another preferred embodiment, the conveyor belts are arranged in two parallel rows, the length-fixing device and the secondary length-fixing device span the two conveyor belts, and the first position detecting member and the second position detecting member are respectively arranged in two rows.

[0023] In another preferred embodiment, the material picking device includes a material picking rack, which includes a top plate and multiple side plates, the side plates are fixed to both sides of the conveyor line, the transverse track is fixed to the top plate, and the top plate is provided with multiple observation ports.

[0024] In another preferred embodiment, the length fixing device comprises:

[0025] A fixed-length frame is fixed on both sides of the conveyor line; and

[0026] A detection plate is rotatably arranged on one side of the fixed-length frame, the detection plate includes a first arm and a second arm, the first arm is provided with a roller, the roller is in contact with the conveyor belt, the second arm is connected to the fixed-length frame through an elastic member, and the end of the second arm is opposite to the first position detection member;

[0027] When the head or tail of the material passes through the roller, the height of the roller changes, the second arm rotates and drives the detection plate to move as a whole, the movement of the second arm triggers the first position detection part, the elastic part drives the second arm to return to its position, and the roller maintains contact with the conveyor belt or material.

[0028] The present invention also provides a control method for a fixed-length feeding device based on the above-mentioned material, comprising the following steps:

[0029] S1. According to the predetermined material length L, the material head passes through the fixed length device and moves along the conveyor belt for a certain distance, and is cut by the cutting device to form a material tail;

[0030] S2, the material head passes through the length-fixing device and reaches the secondary length-fixing device. The second position detection component issues a prompt, and the control system records the material head position P A2 ;

[0031] S3, the material head continues to move to the material taking position, and the material head stops conveying after reaching the material taking position;

[0032] At the same time, the tail of the material passes through the fixed length device, the first position detection part issues a prompt, and the control system records the first tail position P B1 ;

[0033] S4, the suction piece falls and sucks the material head, and the material head moves to the front of the upper drum position along with the conveyor belt and the suction mechanism;

[0034] At the same time, the tail of the material continues to pass through the secondary length-fixing device, the second position detection component issues a prompt, and the control system records the second tail position P B2 ;

[0035] S5, the material head bulges and fits, the suction mechanism returns to the material taking position, and the material tail continues to move to the material taking position;

[0036] At the same time, according to the first tail position P B1 and the material head position P A2 Get the first measured material length L1, adjust the ratio of the conveyor belt speed and the carcass drum laminating speed, and make the first measured material length L1 consistent with the predetermined material length L before the tail of the material reaches the material taking position;

[0037] S6, the tail of the material reaches the material taking position, the carcass drum and the conveyor belt stop moving synchronously, the suction piece falls and sucks the tail of the material, and then the carcass drum and the conveyor belt start, according to the second tail position P B2 and the material head position P A2 Obtain the second measured material length L2, adjust the ratio of the conveyor belt speed and the carcass drum fitting speed, and make the second measured material length L2 consistent with the predetermined material length L before the tail of the material reaches the upper drum position. The tail of the material moves to the upper drum position and is mounted on the drum along with the conveyor belt and the suction mechanism, and then the material head and the tail of the material are overlapped.

[0038] Furthermore, in the above embodiment, the materials are conveyed in two rows synchronously, and the first position detection element, the second position detection element, and the suction element are each provided with two, and in step S3, the following specific steps are also included:

[0039] S31, the first material head arrives at the material taking position, and the conveyor belt where it is located stops;

[0040] S32, the second material head arrives at the material taking position, the conveyor belt where it is located stops, and the timing starts;

[0041] S33. After the second conveyor belt stops transporting for a predetermined time, the two suction parts fall synchronously and the suction cups suck the material head.

[0042] It can be seen from the above technical solution that the advantages and positive effects of the fixed-length feeding device for materials and the control method thereof of the present application are: compared with the existing technology, the present invention adds a fixed-length device, a secondary fixed-length device and a material-taking device, which significantly improves the accuracy of material transportation and positioning. First: when the material head and the material tail pass through the fixed-length device and the secondary fixed-length device, the first position detection part and the second position detection part issue a prompt, and the control system detects the moving distance of the conveyor belt to obtain the moving distance of multiple conveyor belts. At least two independent measured material length values ​​can be obtained by the difference in the moving distance of the conveyor belt. The conveyor belt can compare these two values ​​with the predetermined material length. The length of the material can be corrected within two distances before the tail reaches the material-taking position and before reaching the upper drum position. Dynamic adjustment is supported to ensure that the material length of the upper drum is finally consistent with the predetermined material length. Second: The suction piece falls after the material head or tail reaches the material taking position, and the suction cup absorbs the material. The material does not leave the conveyor belt and moves to the upper drum position under the joint positioning of the conveyor belt and the suction cup, avoiding the length stretching or shortening of the material between the material taking position and the upper drum position, and realizing high-precision drumming of the material head and tail. Moreover, after the material head is drummed, the material tail is positioned by the suction cup, so that the speed of the material tail and the conveyor belt is completely synchronized, so that the speed of the material tail is still controllable, thereby ensuring the overlap accuracy of the material head and tail on the carcass drum, ensuring the fitting accuracy, effectively reducing errors, and improving overall work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0045] Figure 1 It is a structural schematic diagram of the present invention;

[0046] Figure 2 A top view of the present invention;

[0047] Figure 3 It is a structural schematic diagram of the material taking device in the present invention;

[0048] Figure 4It is a side view of the suction mechanism of the present invention;

[0049] Figure 5 It is an oblique view of the suction mechanism of the present invention;

[0050] Figure 6 It is a front view of the suction mechanism of the present invention;

[0051] Figure 7 Schematic diagram of the structure of the length-fixing device in the present invention;

[0052] Figure 8 Schematic diagram of the distance between the various components of the present invention;

[0053] Figure 9 Schematic diagram of material position at the end of step S1 in the control method of the present invention;

[0054] Figure 10 Schematic diagram of material position at the end of step S2 in the control method of the present invention;

[0055] Figure 11 Schematic diagram of material position at the end of step S3 in the control method of the present invention;

[0056] Figure 12 Schematic diagram of material position at the end of step S4 in the control method of the present invention;

[0057] Figure 13 Schematic diagram of material position at the end of step S5 in the control method of the present invention;

[0058] Figure 14 Schematic diagram of material position at the end of step S6 in the control method of the present invention;

[0059] Figure 15 Schematic diagram of the material moving distance of L1 in the control method of the present invention;

[0060] Figure 16 Schematic diagram of the material movement distance of L2 in the control method of the present invention.

[0061] Note: The corresponding relationship between the parts and numbers in the figure is:

[0062] Conveyor line 100, conveyor belt 110, loading point 10, cutting device 20, fixed length device 30, first position detection part 31, fixed length frame 32, detection plate 33, first arm 331, roller 3311, second arm 332, elastic part 3321, secondary fixed length device 40, material picking position 50, material picking device 60, transverse track 61, suction mechanism 62, vertical guide rail 621, telescopic cylinder 622, suction part 623, ejection cylinder 6231, square frame 62311, suction cup 6232, guide rail lock 624, translation guide rail 625, left and right rotating screw 626, material picking frame 63, top plate 631, side plate 632, observation port 633, upper drum position 70, carcass drum 80, material 90.

[0063] Figure 9-16 In the figure, the arrows represent the direction of material movement. DETAILED DESCRIPTION

[0064] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The fixed-length feeding device for materials and the control method thereof provided by the present invention ensure fitting accuracy, effectively reduce errors, and improve overall work efficiency. The present invention is described in detail below in conjunction with the drawings and specific implementation methods of the specification.

[0065] In order to overcome the problem that the delivery accuracy of the material head and the material tail in the fixed length feeding device of the prior art is inconsistent and easily leads to fitting errors, refer to Figure 1 and Figure 2 The present invention provides a fixed-length feeding device for materials, including a conveyor line 100 and a loading position 10, a cutting device 20 and an upper drum position 70 arranged on the conveyor line 100. The conveyor line 100 is provided with a conveyor belt 110. The device also includes a fixed-length device 30, a secondary fixed-length device 40 and a material taking device 60 arranged in sequence along the material conveying direction.

[0066] See Figure 1 、 Figure 2 and Figure 7 The length fixing device 30 is provided at the output side of the cutting device 20, and the length fixing device 30 is provided with a first position detecting member 31. The secondary length fixing device 40 is provided with a second position detecting member.

[0067] See Figure 1 、 Figure 2 and Figure 3The conveyor line 100 is provided with a material taking position 50, and the material taking device 60 is arranged above the conveyor belt 110, see Figure 4 and Figure 5 The material taking device 60 includes a transverse track 61 and a suction mechanism 62 slidingly arranged on the transverse track 61. The transverse track 61 is consistent with the material conveying direction. The suction mechanism 62 is provided with a liftable suction member 623.

[0068] See Figure 4 、 Figure 5 and Figure 6 The suction member 623 is provided with a push-out cylinder 6231 and a suction cup 6232. A square frame 62311 is provided at the push-out end of the push-out cylinder 6231. The width of the square frame 62311 is the same as the width of the conveyor belt 110. The purpose of the square frame 62311 is to push out the beginning or end of the material at the upper drum position 70 so that it fits on the carcass drum 80. Therefore, the square frame 62311 is the same width as the conveyor belt 110, so that the beginning or end of the material is evenly covered on the carcass drum 80. Suction cup 6232 is independently mounted within square frame 62311. Its height is set so that when the ejection end of ejection cylinder 6231 retracts, suction cup 6232 is lower than square frame 62311, allowing suction cup 6232 to hold the beginning or end of the material. When ejection cylinder 6231 actuates, square frame 62311 descends and becomes lower than suction cup 6232, eliminating suction from suction cup 6232 and pushing the material off of suction cup 6232. Square frame 62311 utilizes a frame structure, providing space for suction cup 6232 and ensuring uniform movement of the beginning or end of the material. Suction cup 6232 rises and falls with the movement of suction element 623, without any additional movement of its own. Once the beginning or end of the material reaches the upper drum position 70, ejection cylinder 6231 securely presses it against carcass drum 80, at which point suction cup 6232 should simultaneously release its suction force.

[0069] The layered material enters the conveyor line 100 from the loading station 10 and is then cut into a tail by the cutting device 20. The head or tail of the material passes through the length-fixing device 30 and the secondary length-fixing device 40. The length-fixing device 30 and the secondary length-fixing device 40 issue prompts and respectively record the travel distance of the conveyor belt 110. After the head of the material is on the drum, at least two measured material lengths are obtained based on multiple conveyor belt distances. The ratio of the conveying speed of the conveyor belt 110 and the bonding speed of the carcass drum 80 is adjusted to ensure that the measured material length is consistent with the predetermined material length. The head or tail of the material reaches the material removal position 50, the suction member 623 falls, and the suction cup 6232 absorbs the head or tail of the material. The material moves to the upper drum position 70 along with the conveyor belt 110 and the suction mechanism 62. The pushing end of the pushing cylinder 6231 is actuated, and the square frame 62311 pushes the head or tail of the material so that it is bonded to the carcass drum 80.

[0070] Compared with the prior art, the present invention adds a fixed-length device 30, a secondary fixed-length device 40 and a material-taking device 60, which significantly improves the accuracy of material transportation and positioning. First: when the head and tail of the material pass through the fixed-length device 30 and the secondary fixed-length device 40, the first position detection part 31 and the second position detection part issue a prompt, and the control system detects the moving distance of the conveyor belt to obtain the moving distance of multiple conveyor belts. At least two independent measured material length values ​​can be obtained by the difference in the moving distance of the conveyor belt. The conveyor belt 110 can compare these two values ​​with the predetermined material length. The length of the material can be corrected within two distances before the tail of the material reaches the material-taking position 50 and before it reaches the upper drum position 70. Dynamic adjustment is supported to ensure that the length of the material on the upper drum is finally consistent with the predetermined material length. Second: the suction member 623 falls after the material head or tail reaches the material taking position 50, and the suction cup 6232 absorbs the material, so that the material does not leave the conveyor belt 110 and moves to the upper drum position 70 under the joint positioning of the conveyor belt 110 and the suction member 623, thereby avoiding the length stretching and shortening of the material between the material taking position 50 and the upper drum position 70, and realizing high-precision drumming of the material head and the material tail. Moreover, after the material head is drummed up, the material tail is positioned by the suction cup 6232, so that the speed of the material tail and the conveyor belt 110 is completely synchronized, so that the speed of the material tail is still controllable, thereby ensuring the overlap accuracy of the material head and the material tail on the carcass drum 80, ensuring the fitting accuracy, effectively reducing errors, and improving overall work efficiency.

[0071] Specifically, the first position detection member 31 and the second position detection member can use photoelectric switches to facilitate real-time observation and adjustment by staff. In addition, the suction member 623 uses vacuum adsorption to ensure uniform adsorption force and avoid material damage. The overall system is controlled by PLC to achieve automated operation, reduce manual intervention, and improve production efficiency and product quality. Preferably, the conveyor belt 110 extends outward beyond the conveyor line 100 in order to avoid interference from the frame of the conveyor line 100 and to be closer to the carcass drum 80, so that the transfer distance of the material from the conveyor belt 110 to the carcass drum 80 is shorter, thereby reducing deformation errors.

[0072] See Figure 4 and Figure 5 In a preferred embodiment, the suction mechanism 62 is provided with a vertical guide rail 621, a telescopic cylinder 622 and a suction member 623. The telescopic cylinder 622 is slidably arranged on the vertical guide rail 621, and the telescopic cylinder 622 is provided with a telescopic rod. The suction member 623 is connected to the telescopic rod. The vertical guide rail 621 is used to guide the telescopic rod of the telescopic cylinder 622. The suction member 623 is raised and lowered as the telescopic rod is extended and retracted, so that the load on the telescopic rod is increased. The vertical guide rail 621 is provided to make the lifting and lowering of the suction member 623 more stable.

[0073] See Figure 4 、 Figure 5 and Figure 6Furthermore, in the above embodiment, the telescopic rod is mounted on the vertical guide rail 621 via a guide rail lock 624, and is configured such that: when the telescopic rod is retracted, the suction member 623 is in the waiting position; when the telescopic rod is extended to a predetermined length, the guide rail lock 624 is actuated to lock the telescopic rod, placing the suction member 623 in the suction position; and when the telescopic rod is fully extended, the suction member 623 is in the upper drum position 70. Considering that the suction member 623 needs to maintain contact with the material in the suction position to prevent it from stretching or wrinkling before reaching the carcass drum 80, the guide rail lock 624 ensures that the height of the suction member 623 remains stable. Specifically, the suction component 623 is in a waiting position when the material head or tail has not reached the material picking position 50; when the material head or tail reaches the material picking position 50, the suction component 623 descends to the adsorption position along with the telescopic rod, accurately adsorbs the material head or tail, and the guide rail lock 624 locks the position of the telescopic rod to ensure that the material is limited by the suction component 623 during the transportation process and remains stable, avoiding length errors caused by height changes; after the suction component 623 adsorbs the material head or tail, it moves to the upper drum position 70 along the transverse track 61, and then the suction component 623 descends to the upper drum position 70 along the telescopic rod, ready to attach the material head or tail to the tire drum 80.

[0074] Continue reading Figure 4 、 Figure 5 and Figure 6 , or further, in the above embodiment, the suction mechanism 62 includes a translation guide rail 625 and a driving member. The translation guide rail 625 is arranged on the side of the telescopic rod away from the vertical guide rail 621, and the translation guide rail 625 is perpendicular to the material transmission direction. The driving member is arranged in the middle of the translation guide rail 625, and the suction member 623 is set as two. The driving member drives the two suction members 623 to translate toward or away from each other along the translation guide rail 625 through the left and right rotating screws 626. The suction member 623 can translate in the vertical direction of the conveyor line 100, so that the spacing between the two suction members 623 can adapt to the material bonding position required by different types of tires. There are two suction members 623, which can simultaneously adsorb and position double rows of materials, ensure that the double rows of materials move synchronously, and avoid misalignment. The driving member adjusts the spacing between the two suction members 623 by precisely controlling the left and right rotating screws 626 to adapt to the specifications of different tires, further improving the bonding accuracy and work efficiency.

[0075] See again Figure 2In another preferred embodiment, the conveyor belts 110 are arranged in two parallel rows, the length-fixing device 30 and the secondary length-fixing device 40 span the two conveyor belts 110, and the first position detection member 31 and the second position detection member are respectively arranged in two rows. During the tire bonding process, it is necessary to bond materials on both sides of the tire body, such as shoulder pads, etc. Therefore, this embodiment can simultaneously convey two side-by-side materials to ensure synchronous bonding of materials on both sides and improve production efficiency. The length-fixing device 30 accurately controls the length of the material, and the first position detection member 31 and the second position detection member monitor the position of the material in real time to ensure bonding accuracy. Through the design of double conveyor belts 110, an efficient and accurate dual-material bonding process is achieved.

[0076] See Figure 3 In another preferred embodiment, the material picking device 60 includes a material picking rack 63, and the material picking rack 63 includes a top plate 631 and multiple side plates 632. The side plates 632 are fixed to both sides of the conveyor line 100, and the transverse track 61 is fixed to the top plate 631. The top plate 631 is provided with multiple observation ports 633. The multiple side plates 632 can be fixed to the conveyor line 100 at multiple locations. The spacing between the side plates 632 facilitates the installation of other components such as the secondary length-fixing device 40. The observation window on the top plate 631 facilitates the operator to monitor the material status in real time to ensure that the production process is safe and controllable. The transverse track 61 is fixed to the top plate 631 and is parallel to the conveying direction of the conveyor belt 110, so that the suction mechanism 62 and the layered material can move synchronously.

[0077] See Figure 7In another preferred embodiment, the fixed-length device 30 includes a fixed-length frame 32 and a detection plate 33. The fixed-length frame 32 is fixed on both sides of the conveyor line 100. Since the structures of the fixed-length frame 32 on both sides of the conveyor line 100 are basically the same, the accompanying drawings only show the structure on one side. The detection plate 33 is rotatably arranged on one side of the fixed-length frame 32, and the detection plate 33 includes a first arm 331 and a second arm 332. The first arm 331 is provided with a roller 3311, and the roller 3311 is in contact with the conveyor belt 110. The second arm 332 is connected to the fixed-length frame 32 by an elastic member 3321, and the end of the second arm 332 is opposite to the first position detection member 31. When the head or tail of the material passes through the roller 3311, the height of the roller 3311 changes, and the second arm 332 rotates to drive the detection plate 33 to move as a whole. The movement of the second arm 332 triggers the first position detection part 31, and the elastic part 3321 drives the second arm 332 to return, so that the roller 3311 remains in contact with the conveyor belt 110 or the material. The structure of the second position detection part is basically the same as that of the first position detection part 31, and will not be repeated here. The connection of the elastic part 3321 can ensure that the detection plate 33 rotates flexibly and returns to its position in time, so that the roller 3311 is in close contact with the conveyor belt 110. When the head or tail of the material passes through, the height of the roller 3311 changes, and the detection plate 33 moves. The first position detection part 31 can provide real-time feedback on the material position, accurately control the length, and improve the fitting accuracy. The linkage mechanism between the first arm 331 and the second arm 332 ensures that the detection plate 33 always maintains stable contact during the material transportation process, thereby improving the reliability and stability of the overall process.

[0078] See Figure 1 、 Figure 2 and Figure 8 The present invention also provides a control method for a fixed-length feeding device based on the above-mentioned material, comprising the following steps:

[0079] See Figure 9 S1. According to the predetermined material length L, the head of the material 90 passes through the fixed length device 30 and moves a distance along the conveyor belt 110, and is cut by the cutting device 20 to form a tail of the material 90.

[0080] Specifically, the distance between the cutting device 20 and the length-fixing device 30 is set to a, and the required material length is L. After the head of the material 90 reaches the length-fixing device 30, it continues to travel a distance S = La, and the cutting device 20 is activated to cut the material 90, forming a tail. It should be noted that the predetermined length L should be greater than a.

[0081] See Figure 10 S2, the material head passes through the length-fixing device 30 and reaches the secondary length-fixing device 40, the second position detection component issues a prompt, and the control system records the material head position P A2 Specifically, the distance between the length fixing device 30 and the secondary length fixing device 40 is predetermined to be b.

[0082] Note: The material head position P of different sections of material 90 A2 This is because different sections of material 90 will be stretched or wrinkled to different degrees during the conveying process after being cut, so the lengths covered by different sections of material 90 on the conveyor belt 110 will also be different. For example, the length of the stretched material 90 covering the conveyor belt 110 will be longer than the predetermined length L, and the length of the wrinkled material 90 covering the conveyor belt 110 will be shorter than the predetermined length L. Therefore, the time for each section of material 90 to pass through the fixed length device 30 and the secondary fixed length device 40 after cutting is not the same, and the material head position P A2 different.

[0083] Since different materials 90 undergo different deformations, the position and length of the material on the conveyor belt 110 are also different. The material length of each section of material 90 on the conveyor belt 110 can be measured by using the covering position of the material head and the material tail on the conveyor belt 110. In actual operation, the material head position P A2 The recording method is as follows: the conveyor belt 110 is generally driven by a servo motor, and the moving distance of the conveyor belt 110 in a specific time period is positively correlated with the number of revolutions of the servo motor, and can be directly obtained from the number of revolutions of the motor.

[0084] The distance the conveyor belt 110 moves in a certain period of time = n πD,n represents the number of revolutions of the drum during this time period, and D represents the drum diameter. The conveyor belt 110 is directly wound around the outer circumference of the drum, and the output end of the servo motor drives the conveyor belt 110 through the drum. If the output end of the servo motor is directly connected to the drum, without deceleration, and the reduction ratio i=1, then n=N, where N represents the number of motor revolutions. πD is the outer circumference of the drum, and the running distance of the conveyor belt 110 is the number of revolutions. The outer circumference of the roller. If the servo motor has a differential, the reduction ratio i must also be considered, n = N / i, where N represents the motor speed. The following is an example of calculating the running distance of conveyor belt 110: Given motor speed N = 1500 rpm, reduction ratio i = 15, and roller diameter D = 0.2 meters, the calculation steps are: 1. Actual roller speed: n = 1500 / 15 = 100 rpm; 2. Roller circumference = π 0.2≈0.628m; 3. Conveyor belt running distance L=100 0.628=62.8 meters.

[0085] In actual operation, considering that the material head is detected first and the material tail is detected later, the material head position P A2It is set to 0 point, that is, when the head of each new material reaches the secondary length-fixing device 40, the second position detection component prompts, triggering the control system to reset the previously accumulated number of revolutions to zero, and restart the cumulative recording of the number of revolutions of the servo motor. As the material 90 is conveyed, the number of revolutions continues to accumulate. During the conveying process, when the control system receives a prompt from the first position detection component 31 or the second position detection component, it calculates the required position value.

[0086] See Figure 11 , S3, the material head continues to move to the material taking position 50, and the material head stops conveying after reaching the material taking position 50;

[0087] At the same time, the tail of the material passes through the length fixing device 30, the first position detection part 31 issues a prompt, and the control system records the first tail position P B1 .

[0088] Note: The material taking position 50 is a fixed position, which is opposite to the initial position of the suction member 623 and does not change with the position of the conveyor belt 110. The first tail position P of the material 90 in different sections B1 There will be differences, the reasons for the differences are related to the above-mentioned material head position P A2 Same. If the material head position P A2 Set to 0 point, the first tail position P B1 That is, the distance that the conveyor belt 110 moves during the period from when the second position detection component prompts the material head to pass and when the first position detection component 31 prompts the material tail to pass. According to the above calculation formula, the first material tail position P can be obtained by the number of motor revolutions during this period. B1 .

[0089] See Figure 12 , S4, the suction member 623 falls, the suction cup 6232 sucks the material head, and the material head moves to the front of the upper drum position 70 along with the conveyor belt 110 and the suction mechanism 62;

[0090] At the same time, the tail of the material continues to pass through the secondary length fixing device 40, the second position detection part sends a prompt, and the control system records the second tail position P B2 .

[0091] Note: The upper drum position 70 is a fixed position and does not change with the change of the conveyor belt 110. The second tail position P of the material 90 of different sections B2 There will be differences, the reasons for the differences and the material head position P A2 Same. If the material head position P A2 Set to 0 point, the second tail position P B2 That is, the distance that the conveyor belt 110 moves during the period from when the second position detection component prompts the material head to pass and when the second position detection component prompts the material tail to pass. Therefore, according to the above calculation formula, the second material tail position P can be obtained by the number of motor revolutions during this period.B2 .

[0092] See Figure 13 , S5, the material head is bulged and fitted, the suction mechanism 62 returns to the material taking position 50, and the material tail continues to move to the material taking position 50;

[0093] At the same time, according to the first tail position P B1 and the material head position P A2 The first measured material length L1 is obtained, and the ratio of the speed of the conveyor belt 110 and the laminating speed of the carcass drum 80 is adjusted so that the first measured material length L1 is consistent with the predetermined material length L before the tail of the material reaches the material taking position 50.

[0094] Specifically, see Figure 15 , record the moving distance D1=P of the conveyor belt 110 B1 -P A2 , the first measured length of material 90 is L1 = D1 + b. It should be noted that the predetermined length L should be greater than b. If L1>L, the difference m is calculated. Before reaching the material dispensing position 50, the conveyor belt 110 is accelerated to a speed greater than the linear velocity of the carcass drum 80. Before the material 90 moves the distance to the dispensing position 50, the material 90 is retracted by an amount m. If L1<L, the difference n is calculated. Before reaching the material dispensing position 50, the conveyor belt 110 is reduced to a speed less than the linear velocity of the carcass drum 80, causing the material 90 to stretch by an amount n.

[0095] In actual operation, considering the material head position P A2 , the first tail position P B1 , the second tail position P B2 The measurement order of these three positions can be used to A2 Set to 0 point, that is, when the material head reaches the secondary length fixing device 40, the second position detection component prompts, triggering the control system to reset the previously accumulated number of revolutions to zero, and restart the cumulative recording of the number of revolutions of the servo motor. As the material 90 is conveyed, when the tail of the material reaches the length fixing device 30, the control system automatically calculates the moving distance of the conveyor belt 110 according to the accumulated number of revolutions, that is, the first tail position P B1 , the material 90 continues to be conveyed, the number of revolutions continues to accumulate, and when the tail reaches the secondary fixed length device 40, the control system automatically calculates the moving distance of the conveyor belt 110 according to the accumulated number of revolutions, which is the second tail position P B2 .

[0096] See Figure 14 , S6, the tail of the material reaches the material taking position 50, the carcass drum 80 and the conveyor belt 110 stop moving synchronously, the suction piece 623 falls, the suction cup 6232 sucks the tail of the material, and then the carcass drum 80 and the conveyor belt 110 start, according to the second tail position P B2 and the material head position P A2Obtain the second measured material length L2, adjust the ratio of the speed of the conveyor belt 110 and the fitting speed of the carcass drum 80, and make the second measured material length L2 consistent with the predetermined material length L before the tail of the material reaches the upper drum position 70. The tail of the material moves to the upper drum position 70 along with the conveyor belt 110 and the suction mechanism 62 and is put on the drum, so that the head and tail of the material are overlapped.

[0097] Specifically, see Figure 16 , record the second measured length of material 90 as L2=P B2 -P A2 If L2>L, the difference m is calculated. Before reaching the upper drum position 70, the conveyor belt 110 and the suction mechanism 62 accelerate the moving speed, which is greater than the linear speed of the carcass drum 80, that is, the material 90 produces a retraction amount m; if L2<L, the difference n is calculated. Before reaching the upper drum position 70, the conveyor belt 110 and the suction mechanism 62 reduce the moving speed, which is less than the linear speed of the carcass drum 80, causing the material 90 to produce a stretching amount n.

[0098] The present invention realizes two length measurements by using the cutting device 20 to perform one-time length determination, and uses the length determination device 30 and the secondary length determination device 40 to perform one detection of the material head and two detections of the material tail, totaling three positioning detections, and adjusts the conveying speed of the material 90 twice according to the results of the two length measurements. The material picking device 60 is used to fully control the material head and the material tail before the drum is put on, thereby eliminating the error caused by the expansion and contraction deformation of the material 90 during the conveying and bonding process, ensuring the accuracy of the overlap of the material head and the material tail, avoiding manual intervention, and realizing automatic production.

[0099] Specifically, the distance between the secondary length-fixing device 40 and the material-picking position 50 is set to c, and the conveyor belt 110 is controlled to move forward synchronously for a distance c before reaching the material-picking position 50. Since there is a position detection prompt in the secondary length-fixing device 40 and a suction mechanism 62 at the material-picking position 50 to adsorb the material 90 for positioning, the distance c should be minimized to prevent errors caused by deformation of the material 90 in this distance.

[0100] Furthermore, in the above embodiment, the material 90 is conveyed in two rows synchronously, and the first position detection member 31, the second position detection member, and the suction member 623 are each provided with two. In step S3, the following specific steps are also included:

[0101] S31, the first material head arrives at the material taking position 50, and the conveyor belt 110 where it is located stops;

[0102] S32, the second material head arrives at the material taking position 50, the conveyor belt 110 where it is located stops, and the timing starts;

[0103] S33. After the second conveyor belt 110 stops transporting for a predetermined time, the two suction members 623 fall synchronously, and the suction cup 6232 sucks the material head.

[0104] In this embodiment, the two materials 90 are arranged side by side. At this time, the material heads of the two materials 90 may no longer be aligned due to their own stretching and deformation. The conveyor belts 110 on both sides are controlled separately. The material heads of the two materials 90 arrive at the material extraction position 50 synchronously or asynchronously via their respective conveyor belts 110. It is necessary to wait until both material heads stop before starting the timer to synchronize the suction and transportation of the subsequent material heads. This design controls the position of the two material heads to be flush, ensuring that the starting point of the two material heads' adhesion to the carcass drum 80 is consistent. Similarly, in step S4, when the material tail reaches the material extraction position 50, after the two material tails are in place according to the above steps, the two suction members 623 fall synchronously, and the suction cup 6232 absorbs the material tail.

[0105] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0106] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A fixed-length feeding device for materials, comprising a conveyor line and a loading position, a cutting device and a drum position arranged on the conveyor line, wherein the conveyor line is provided with a conveyor belt, characterized in that: The fixed-length feeding device further includes: A length fixing device is provided on the output side of the cutting device, and the length fixing device is provided with a first position detecting member; A secondary length fixing device is provided with a second position detecting member; and The material taking device is provided with a material taking position on the conveyor line, and the material taking device is provided above the conveyor belt. The material taking device includes a transverse track and a suction mechanism slidably provided on the transverse track, and the transverse track is consistent with the material conveying direction. The suction mechanism is provided with a liftable suction member, and the suction member is provided with a push-out cylinder and a suction cup. The push-out end of the push-out cylinder is provided with a square frame, and the width of the square frame is consistent with the width of the conveyor belt; the suction cup is independently provided in the square frame, and the height of the suction cup is set as follows: when the push-out end of the push-out cylinder is retracted, the suction cup is lower than the square frame; when the push-out end of the push-out cylinder is actuated, the square frame descends and is lower than the suction cup; The material is cut by the cutting device to form a tail, and the head or tail of the material passes through the fixed length device and the secondary fixed length device. The first position detection part and the second position detection part issue prompts and record the moving distance of the conveyor belt respectively. After the head of the material is put on the drum, at least two measured material lengths are obtained according to the moving distances of multiple conveyor belts. The ratio of the conveying speed of the conveyor belt and the tire drum fitting speed is adjusted to make the measured material length consistent with the predetermined material length. The head or tail of the material reaches the material picking position, the suction part falls, and the suction cup absorbs the head or tail of the material. The material moves to the upper drum position along with the conveyor belt and the suction mechanism. The pushing end of the pushing cylinder moves, and the square frame pushes the head or tail of the material out so that it fits on the tire drum.

2. The fixed-length feeding device for materials according to claim 1, characterized in that: The suction mechanism includes: vertical guide rails; a telescopic cylinder, slidably mounted on the vertical guide rail, the telescopic cylinder being provided with a telescopic rod; and The suction member is connected to the telescopic rod.

3. The fixed-length feeding device for materials according to claim 2, characterized in that: The telescopic rod is arranged on the vertical guide rail through a guide rail lock and is configured as follows: The telescopic rod is retracted, and the suction member is in a waiting position; The telescopic rod is extended to a predetermined length, the guide rail lock is actuated to lock the telescopic rod, and the suction member is in the suction position; The telescopic rod is fully extended and the suction member is in the upper bulge position.

4. The fixed-length feeding device for materials according to claim 2, characterized in that: The suction mechanism comprises: a translation guide rail, provided on a side of the telescopic rod facing away from the vertical guide rail, the translation guide rail being perpendicular to a material conveying direction; and The driving member is arranged on the translation guide rail, and the two suction members are arranged as two. The driving member drives the two suction members to translate toward or away from each other along the translation guide rail through the left and right rotating screws.

5. The fixed-length feeding device for materials according to claim 1, characterized in that: The conveyor belts are arranged in two parallel rows, the length-fixing device and the secondary length-fixing device span the two conveyor belts, and the first position detecting member and the second position detecting member are respectively arranged in two rows.

6. The fixed-length feeding device for materials according to claim 1, characterized in that: The material taking device includes a material taking frame, and the material taking frame includes a top plate and multiple side plates. The side plates are fixed to both sides of the conveyor line, and the transverse track is fixed to the top plate. The top plate is provided with multiple observation ports.

7. The fixed-length feeding device for materials according to claim 1, characterized in that: The length fixing device comprises: A fixed-length frame is fixed on both sides of the conveyor line; and A detection plate is rotatably arranged on one side of the fixed-length frame, the detection plate includes a first arm and a second arm, the first arm is provided with a roller, the roller is in contact with the conveyor belt, the second arm is connected to the fixed-length frame through an elastic member, and the end of the second arm is opposite to the first position detection member; When the head or tail of the material passes through the roller, the height of the roller changes, the second arm rotates and drives the detection plate to move as a whole, the movement of the second arm triggers the first position detection part, the elastic part drives the second arm to return to its position, and the roller maintains contact with the conveyor belt or material.

8. A control method for the fixed-length material feeding device according to claim 1, characterized in that: The following steps are involved: S1. According to the predetermined material length L, the material head passes through the fixed length device and moves along the conveyor belt for a certain distance, and is cut by the cutting device to form a material tail; S2, the material head passes through the length-fixing device and reaches the secondary length-fixing device. The second position detection component issues a prompt, and the control system records the material head position P A2 ; S3, the material head continues to move to the material taking position, and the material head stops conveying after reaching the material taking position; At the same time, the tail of the material passes through the fixed length device, the first position detection part issues a prompt, and the control system records the first tail position P B1 ; S4, the suction piece falls, the suction cup sucks the material head, and the material head moves to the front of the upper drum position along with the conveyor belt and the suction mechanism; At the same time, the tail of the material continues to pass through the secondary length-fixing device, the second position detection component issues a prompt, and the control system records the second tail position P B2 ; S5, the material head bulges and fits, the suction mechanism returns to the material taking position, and the material tail continues to move to the material taking position; At the same time, according to the first tail position P B1 and the material head position P A2 Get the first measured material length L1, adjust the ratio of the conveyor belt speed and the carcass drum laminating speed, and make the first measured material length L1 consistent with the predetermined material length L before the tail of the material reaches the material taking position; S6, the tail of the material reaches the material taking position, the carcass drum and the conveyor belt stop moving synchronously, the suction piece falls, the suction cup sucks the tail of the material, and then the carcass drum and the conveyor belt start, according to the second tail position P B2 and the material head position P A2 Obtain the second measured material length L2, adjust the ratio of the conveyor belt speed and the carcass drum fitting speed, and make the second measured material length L2 consistent with the predetermined material length L before the tail of the material reaches the upper drum position. The tail of the material moves to the upper drum position and is mounted on the drum along with the conveyor belt and the suction mechanism, and then the material head and the tail of the material are overlapped.

9. The control method of the fixed-length material feeding device according to claim 8, characterized in that: The materials are conveyed in two rows synchronously, and two first position detection members, two second position detection members, and two suction members are provided. In step S3, the following specific steps are also included: S31, the first material head arrives at the material taking position, and the conveyor belt where it is located stops; S32, the second material head arrives at the material taking position, the conveyor belt where it is located stops, and the timing starts; S33. After the second conveyor belt stops transporting for a predetermined time, the two suction parts fall synchronously and the suction cups suck the material head.

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