Method and system for controlling deviation correction and fitting of belt drum

Abstract

The invention discloses a belt drum deviation rectifying and attaching control method. The method comprises the steps that S1, an image containing rubber and a feeding conveying belt below the rubber is collected; s2, determining the actual length of the sizing material, the length of a head triangular area, the length of a tail triangular area and the center offset value of the sizing material on the feeding conveying belt; s3, adjusting the axial displacement change of the belt drum according to the result of the step 2, so that the belt drum is always centered with the sizing material; s4, according to the result of the step 2, determining the rotating speed change mode of the belt drum, so that the rubber material can surround the belt drum by a circle, and a complete and uniform annular belt body is formed in a mode that the head and tail triangular areas are spliced; according to the control method and the control system, the axial moving mode and the rotating speed of the belt drum are controlled by combining the real-time characteristics of the feeding conveying belt and the rubber material conveyed on the feeding conveying belt, the purpose of deviation correction on the drum is achieved, and the quality of a subsequently-formed tire is guaranteed and improved.

Description

Technical Field

[0001] The invention relates to the technical field of three-drum forming machines, and in particular to a belt-drum deviation-correcting and laminating control method and a control system thereof. Background Art

[0002] The existing three-drum forming machines have two structural forms: three-drum two-chassis and three-drum three-chassis. In the three-drum two-chassis forming machine, the belt drum and the forming drum share a chassis in the structural design to realize the action drive of the two; compared with the three-drum three-chassis forming machine, this model has higher production efficiency due to the characteristics of in-line lamination without radial movement; however, in terms of structural layout, the forming drum is installed at a position far away from the chassis through its drive shaft, resulting in large deflection during production and cannot be adjusted separately.

[0003] In view of the technical problems existing in the existing three-drum two-chassis forming machine, the applicant uses the original chassis as the forming drum drive control chassis, and designs an in-line belt drum chassis for the belt drum separately, so as to realize independent drive control of the rotation and expansion and contraction of the belt drum. At the same time, the in-line belt drum chassis is slidably assembled on the slide rail of the original forming machine base through a slider located at the bottom of the chassis. Not only can the original three-drum two-chassis machine structure layout be still adopted to maintain the in-line bonding without radial movement, but also in the actual production operation process, the belt drum can be moved separately according to the actual feeding position of the feeding system to achieve the purpose of correcting the deviation on the drum. However, according to the above-mentioned structural improvement, how to realize the corresponding axial movement of the belt drum combined with the feeding situation of the feeding system still lacks the corresponding control mechanism. Therefore, it is necessary to design a belt drum correction and bonding control system and a supporting control method to further achieve the purpose of improving the operating accuracy of the equipment. Summary of the invention

[0004] The object of the present invention is to provide a belt drum deviation correction and fitting control method that solves the above-mentioned technical problems.

[0005] The object of the present invention is to provide a control system for realizing the above-mentioned belt drum deviation correction and fitting control method.

[0006] To this end, the technical solution of the present invention is as follows:

[0007] A belt drum deviation correction and lamination control method, the steps are as follows:

[0008] S1, collecting images including the rubber material and the feeding conveyor belt thereunder;

[0009] S2, determining the actual length of the rubber material, the length of the head triangle area and the length of the tail triangle area, and the center offset change of the rubber material on the feeding conveyor belt according to the image collected in step S1;

[0010] S3. According to the change of the center offset value of the rubber material on the feeding conveyor belt, the axial displacement change of the belt drum is adjusted so that the belt drum always receives the falling rubber material in a manner that is aligned with the rubber material;

[0011] S4. Determine the speed change mode of the belt drum according to the length of the rubber material, the circumference of the belt drum, and the conveying speed of the feed conveyor belt, so that the rubber material can wrap around the belt drum and form a complete and uniform annular belt body by splicing the head and tail triangle areas.

[0012] Furthermore, in step S3, the start time of adjusting the axial displacement of the belt drum is determined according to the distance from the front end of the rubber material to the front end of the feeding conveyor belt and the conveying speed of the feeding conveyor belt at the time of image acquisition in step S1.

[0013] Furthermore, in step S4, the speed v of the belt drum is B And the change mode of the rotation duration t is set as:

[0014]

[0015] In the formula, v B is the real-time speed of the belt drum, v 0 is the conveying speed of the feeding conveyor belt, t 1 The length of time that the belt drum maintains the rotation speed of the first stage, l head l is the length of the head triangle area of ​​the rubber; mid is the length of the middle area, Δl is the difference between the length of the rubber and the circumference of the belt drum, Δl = L B -L real , t 2 The length of time that the belt drum maintains the rotation speed of stage II, l tail is the length of the tail triangle area, t 3 The length of time the belt drum is kept at the stage III rotation speed.

[0016] A control system for implementing the belt drum deviation correction and lamination control method, comprising:

[0017] An image acquisition system is arranged just above the feed conveyor belt to acquire images of the rubber material and the feed conveyor belt thereunder;

[0018] An image processing system connected to the image acquisition system to analyze images of the rubber material and the feeding conveyor belt thereunder to obtain the actual length of the rubber material, the length of the head triangle area, the length of the middle area and the length of the tail triangle area, and the center offset value of the rubber material relative to the feeding conveyor belt in the length direction;

[0019] A belt drum displacement controller, which is connected to the image processing system and the mobile drive mechanism in the belt drum chassis respectively, so as to output a displacement adjustment parameter to the mobile drive mechanism according to the acquisition result of the image processing system;

[0020] The belt drum speed controller is respectively connected to the image processing system and the rotation driving mechanism in the belt drum chassis to output rotation control parameters to the rotation driving mechanism according to the acquisition results of the image processing system.

[0021] Furthermore, the image acquisition system includes a camera and a fill light, and the camera is arranged with the lens facing vertically downward.

[0022] Compared with the prior art, the belt drum deviation correction and fitting control method and control system can control the axial movement mode and rotation speed of the belt drum based on the structural characteristics that the belt drum has an independent control chassis and can slide freely in the axial direction on the base, and combined with the real-time characteristics of the feeding conveyor belt and the rubber material transported thereon, to achieve the purpose of deviation correction on the drum, so that the rubber material in any conveying state on the feeding conveyor belt can be wound centrally on the belt drum, and the head and tail triangle areas are spliced ​​together to form a complete and uniform annular belt body, thereby ensuring and improving the quality of the subsequent tire molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a three-drum three-chassis forming machine applicable to the present invention;

[0024] Figure 2 It is a schematic diagram of the structural arrangement of the three-drum three-chassis forming machine and the feeding conveyor belt of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the rubber material;

[0026] Figure 4 It is a structural schematic diagram of the rubber material being conveyed on the feeding conveyor belt;

[0027] Figure 5 The present invention is a flow chart of the belt drum deviation correction and lamination control method. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the following embodiments are by no means intended to limit the present invention in any way.

[0029] like Figure 1The figure shows a three-drum three-chassis forming machine assembled after structural improvement based on the existing three-drum two-chassis forming machine, which includes a forming drum chassis 1, a belt drum chassis 2, two forming drums 3, a belt ring 4 and a belt drum 5 arranged on a base 6; wherein, a slide rail is provided on the base 6, and the forming drum chassis 1 is rotatably arranged with a forming drum mounting shaft thereon, and is driven to rotate by a rotating motor; the belt drum chassis 2 is slidably arranged on the slide rail through a slider arranged at the bottom, and is located at the front side of the forming drum chassis 1; the belt drum 5 is mounted on the belt drum mounting seat located at the front end of the belt drum chassis 2, and the forming drum mounting shaft is passed from the central channel of the belt drum chassis 2 to the front side of the belt drum 5, so that the two forming drums 3 are installed on the forming drum mounting shaft at intervals; the belt ring 4 is slidably arranged on the slide rail through a slider arranged at the bottom, and can slide to the setting position of the forming drum 3 or the belt drum 5 through the slide rail.

[0030] A rotation drive mechanism, an expansion and contraction drive mechanism and a movement drive mechanism are provided on the belt drum chassis 2; wherein the rotation drive mechanism controls the rotation direction and rotation speed of the belt drum 5, the expansion and contraction drive mechanism controls the expansion and contraction state and expansion and contraction speed of the belt drum 5; the movement drive mechanism controls the axial movement direction and axial movement distance of the belt drum 5 on the base 6.

[0031] In the production operation state, a feeding conveyor belt 7 is installed on the adjacent side of the belt drum 5, and the conveying direction of the feeding conveyor belt 7 is perpendicular to the setting direction of the slide rail on the base of the molding machine, so that when the feeding conveyor belt 7 conveys the rubber 8 to the belt drum 5, the belt drum 5 rotates synchronously and makes the rubber 8 wrap around the belt drum 5 for one circle, so that the rubber 8 finally wraps around the belt drum 5 and forms an annular belt body; in the above process, 1) since the actual conveying position of the rubber 8 on the feeding conveyor belt 7 is uncertain, in order to achieve the ideal state that the rubber 8 is wound in the center of the belt drum 5, the belt drum 5 needs to be axially moved and adjusted according to the conveying position of the rubber 8; 2) in the cutting process of the rubber 8 before conveying, there is often a cutting length error, that is, the actual length of the rubber 8 is slightly greater than or slightly less than the circumference of the belt drum 5, resulting in it being unable to form a complete and uniform annular belt body on the belt drum 5, affecting the quality of the final tire product.

[0032] Based on this, in this embodiment, a belt drum deviation correction and lamination control system is arranged at the belt drum and its feeding conveyor belt 7 to realize deviation correction and lamination control of the belt drum during the production operation.

[0033] like Figure 2 As shown, the belt drum deviation correction and lamination control system includes:

[0034] An image acquisition system is arranged just above the feeding conveyor belt 7 to acquire images of the rubber material 8 and the feeding conveyor belt 7 thereunder; specifically, the image acquisition system comprises a camera and a fill light, the camera is arranged with the lens facing vertically downward, and the fill light is arranged on the adjacent side of the camera to ensure the clarity of the acquired image;

[0035] The image processing system is connected to the image acquisition system to obtain and analyze the image of the rubber material 8 and the feeding conveyor belt 7 below it. The analysis and acquisition include: Figure 3 The actual length L of the rubber material 8 is shown real , length of the head triangle area l head , length of the middle zone l mid and the length of the tail triangle area l tail , and the center offset change of the rubber material 8 on the feeding conveyor belt 7, specifically, the center offset value Δd of each sampling point from the head to the tail of the rubber material 8 relative to the feeding conveyor belt 7 in the length direction, that is, the vertical distance from the length center line of the rubber material 8 to the length center line of the feeding conveyor belt 7, see Figure 4 ; Among them, the spacing between adjacent sampling points is the same, and the specific spacing value can be set according to the target accuracy;

[0036] A belt drum displacement controller, which is connected to the image processing system and the mobile drive mechanism of the belt drum chassis respectively, so as to output a displacement adjustment parameter to the mobile drive mechanism according to the acquisition result of the image processing system;

[0037] The belt drum speed controller is respectively connected to the image processing system and the rotation driving mechanism of the belt drum chassis to output rotation control parameters to the rotation driving mechanism according to the acquisition results of the image processing system.

[0038] See also Figure 5 The specific implementation steps of the belt drum deviation correction and lamination control method based on the above-mentioned belt drum deviation correction and lamination control system are described as follows.

[0039] S1. Collect an image including the rubber material 8 and the feeding conveyor belt 7 thereunder.

[0040] S2. Obtain the actual length L of the rubber material 8 according to the image obtained in step S1. real , length of the head triangle area l head , length of the middle area l mid and the length of the tail triangle area l tail , and the center offset variation of the rubber compound 8, see Figure 3 and Figure 4 .

[0041] S3. According to the change of the center offset of the rubber material 8 from the head to the tail, the axial displacement of the belt drum is adjusted so that the belt drum 5 is always kept in alignment with the rubber material 8, that is, the rubber material 8 is always centered and falls on the outer peripheral center line of the belt drum 5 as it is conveyed by the feeding conveyor belt 7, and rotates around the outer peripheral center line of the belt drum 5 once as the belt drum 5 rotates.

[0042] In actual operation, the position of the feeding conveyor belt 7 is fixed, and the belt drum 5 is generally initially located at a position aligned with the feeding conveyor belt 7; and the rubber material 8 cut each time is often in a non-centrally arranged state on the feeding conveyor belt 7 due to the influence of different factors, for example: it is arranged at a position biased to one side of the feeding conveyor belt 7, or is arranged obliquely on the feeding conveyor belt 7; therefore, the belt drum 5 needs to be adjusted according to the change in the distance between the rubber material 8 and the feeding conveyor belt 7, that is, the change in the center offset value Δd; in the process of the rubber material 8 winding around the belt drum 5 for one circle, the axial displacement of the belt drum 5 is adjusted to keep the belt drum 5 always aligned with the rubber material 8.

[0043] Since the vertical distance between the rubber material 8 and the centerline position of the feeding conveyor belt 7 in the length direction thereof is variable, that is, the center offset value Δd is variable, the belt drum 5 always keeps moving in the axial direction during the winding process of the rubber material 8; as described in the system setting part, based on obtaining each sampling point where the center offset value Δd of the rubber material 8 relative to the feeding conveyor belt 7 changes, in the actual control of step S3, the centering control process of the belt drum 5 and the rubber material 8 can be transformed into a control for the purpose of centering the belt drum 5 with each sampling point in turn. In addition, since the distance of the belt drum 5 from the front end of the feeding conveyor belt 7 at the time of image acquisition can also be obtained through image analysis, the starting time of the axial displacement adjustment of the belt drum can be determined based on the above-mentioned known distance and the conveying speed of the feeding conveyor belt 7.

[0044] S4, according to the length L of the rubber material 8 real 、The circumference L of the belt drum 5 B , and the conveying speed v of the feeding conveyor belt 7 0 , determine the speed change mode of the belt drum 5 so that the rubber material 8 can surround the belt drum 5 for one circle and form a complete and uniform annular belt body by splicing its head and tail triangular areas.

[0045] In step S4, the speed v of the belt drum 5 is B And the change mode of the rotation duration t is set as:

[0046]

[0047] In the formula, v B is the real-time speed of the belt drum 5, v 0 is the conveying speed of the feeding conveyor belt 7, t 1The time length of the belt drum 5 maintaining the rotation speed of the first stage, l head is the length of the head triangle area of ​​the rubber material 8, l mid is the length of the middle area, Δl is the difference between the length of the rubber material 8 and the circumference of the belt drum 5, Δl = L B -L real , t 2 The time length of the belt drum 5 maintaining the rotation speed of the second stage, l tail is the length of the tail triangle area, t 3 The time length for which the belt drum 5 maintains the rotation speed of the stage III.

[0048] In the above-mentioned first stage, the head triangle area of ​​the rubber material 8 falls onto the belt drum 5, and is wound around the outer periphery of the belt drum 5 as the belt drum 5 rotates. In this stage, the rotation speed of the belt drum 5 is kept consistent with the conveying speed of the feeding conveyor belt 7.

[0049] In the above-mentioned Phase II, the middle area of ​​the rubber material 8 begins to be wound around the outer periphery of the belt drum 5. This phase is the adjustment phase, and the belt drum 5 adjusts the rotation speed according to the difference between the actual length of the rubber material 8 and its circumference. Specifically, when the actual length of the rubber material 8 is less than the circumference of the belt drum 5, the belt drum 5 appropriately increases the rotation speed to stretch the rubber material 8 to compensate for the difference, so that the tail triangle area of ​​the rubber material 8 can be subsequently aligned and spliced ​​with its head triangle area. Similarly, when the actual length of the rubber material 8 is greater than the circumference of the belt drum 5, the belt drum 5 appropriately slows down the rotation speed to delay the unwinding of the rubber material 8 to reduce the difference, which can also enable the tail triangle area of ​​the rubber material 8 to be subsequently aligned and spliced ​​with its head triangle area. When the actual length of the rubber material 8 is equal to the circumference of the belt drum 5, the speed of the belt drum 5 does not need to be adjusted, and it still remains consistent with the conveying speed of the feed conveyor belt 7, which can directly meet the subsequent alignment and splicing of the tail triangle area of ​​the rubber material 8 with its head triangle area.

[0050] In the above-mentioned stage III, the tail triangle area of ​​the rubber material 8 falls onto the belt drum 5, which is the same as the head triangle area of ​​the rubber material 8. This part is not suitable for length adjustment due to its narrow width and uneven shape. Therefore, the rotation speed of the belt drum 5 in this stage is also kept consistent with the conveying speed of the feed conveyor belt 7.

[0051] In summary, the belt drum deviation correction and lamination control method and control system are based on the structural characteristics of the belt drum having an independent control chassis and being able to slide freely axially on the base, and combined with the real-time characteristics of the feeding conveyor belt and the rubber material transported thereon, to control the axial movement mode and rotation speed of the belt drum to achieve the purpose of deviation correction on the drum. After actual production and application, the control method and control system can make the rubber material in any conveying state on the feeding conveyor belt be wound in the center of the belt drum, and form a complete and uniform annular belt body by splicing its head and tail triangle areas, thereby ensuring and improving the quality of the subsequent tire molding.

Claims

1. A belt drum deviation correction and lamination control method, characterized in that: Here are the steps: S1, collecting images including the rubber material and the feeding conveyor belt thereunder; S2, determining the actual length of the rubber material, the length of the head triangle area and the length of the tail triangle area, and the center offset change of the rubber material on the feeding conveyor belt according to the image collected in step S1; S3. According to the change of the center offset value of the rubber material on the feeding conveyor belt, the axial displacement change of the belt drum is adjusted so that the belt drum always receives the falling rubber material in a manner that is aligned with the rubber material; S4. Determine the speed change mode of the belt drum according to the length of the rubber material, the circumference of the belt drum, and the conveying speed of the feed conveyor belt, so that the rubber material can wrap around the belt drum and form a complete and uniform annular belt body by splicing the head and tail triangle areas.

2. The belt drum deviation correction and lamination control method according to claim 1, characterized in that: In step S3, the start time of adjusting the axial displacement of the belt drum is determined according to the distance from the front end of the rubber material to the front end of the feeding conveyor belt and the conveying speed of the feeding conveyor belt at the time of image acquisition in step S1.

3. The belt drum deviation correction and lamination control method according to claim 1, characterized in that: In step S4, the belt drum speed v B And the change mode of the rotation duration t is set as: In the formula, v B is the real-time rotation speed of the belt drum, v0 is the conveying speed of the feeding conveyor belt, t1 is the time length for the belt drum to maintain the rotation speed of the first stage, l head l is the length of the head triangle area of ​​the rubber; mid is the length of the middle area, Δl is the difference between the length of the rubber and the circumference of the belt drum, Δl = L B -L real , t2 is the time length of the belt drum maintaining the rotation speed of stage II, l tail is the length of the tail triangle area, and t3 is the time length that the belt drum maintains the rotation speed of stage III.

4. A control system for realizing the belt drum deviation correction and lamination control method according to any one of claims 1 to 3, characterized in that: include: An image acquisition system is arranged just above the feed conveyor belt to acquire images of the rubber material and the feed conveyor belt thereunder; An image processing system connected to the image acquisition system to analyze images of the rubber material and the feeding conveyor belt thereunder to obtain the actual length of the rubber material, the length of the head triangle area, the length of the middle area and the length of the tail triangle area, and the change in the offset of the rubber material relative to the center of the feeding conveyor belt in the length direction; A belt drum displacement controller, which is connected to the image processing system and the mobile drive mechanism in the belt drum chassis respectively, so as to output a displacement adjustment parameter to the mobile drive mechanism according to the acquisition result of the image processing system; The belt drum speed controller is respectively connected to the image processing system and the rotation driving mechanism in the belt drum chassis to output rotation control parameters to the rotation driving mechanism according to the acquisition results of the image processing system.

5. The belt drum deviation correction and lamination control method according to claim 4, characterized in that: The image acquisition system includes a camera and a fill light, and the camera is arranged with the lens facing vertically downward.

Images