Automatic splicing active deviation correction system for steel cord cutting machine

Abstract

The present invention discloses an automatic splicing active deviation correction system for a steel cord cutting machine. The deviation correction and splicing device includes a splicing machine and a splicing feeder, arranged in front and rear along the cord conveying direction. The splicing feeder is hinged at the rear, and a yaw mechanism is provided at the front of the splicing feeder, which drives the machine body to swing under the control of a programmable controller (PLC). Edge sensor I is installed on the splicing feeder and senses the front and rear edges of the cut cord in a non-contact manner. Edge sensor II is installed on the splicing machine in front of the splicing position and senses the rear edge of the spliced cord in a non-contact manner. The yaw mechanism adjusts the splicing feeder based on feedback from edge sensors I and II, aligning the front edge of the cut cord with the rear edge of the spliced cord and returning the tail edge of the cut cord that has swung back to the cutting reference line. The present invention can significantly improve the splicing accuracy of the cord, reduce unqualified splices caused by cord oversize, and achieve unmanned intelligent splicing.

Description

Technical Field

[0001] The invention relates to tire component production equipment, in particular to an automatic splicing active deviation correction system for a steel cord cutting machine. Background Art

[0002] Steel cord refers to a tire component in which rubber is covered on the steel cord. On the cord calender, the steel cord is covered with rubber to form a steel cord roll. The steel cord roll is cut at different angles and widths on the steel cord cutting machine. The cut cord is shaped like a parallelogram with a certain angle and width. In order to achieve continuity in tire molding, the small-angle steel cord cutting machine is designed with a joint device to connect the cut cord strips in a direction parallel to the steel wire (each parallelogram cord is connected end to end), and then roll them up for use in the molding machine.

[0003] Steel cord serves as the tire's skeleton, and its angle, width, continuity, and uniformity are crucial quality indicators. Misalignment at the cord joints is a major quality issue when the cord is molded into a tire. Typically, the joint misalignment is required to be <±1mm-2mm, with high-grade tires requiring a misalignment of <±0.5mm.

[0004] The steel cord fabric of the tire is a thin sheet with a certain degree of stickiness and softness. It sticks to the knife during cutting, and its position will change during blanking. It will also be disturbed during transportation, causing misalignment when the cord is docked. Due to the existence of stickiness, the cord will swing out during transportation, that is, the tail of the cord will deviate from the cutting line (baseline), which is also a common problem.

[0005] The current small-angle steel cord automatic jointing device mainly realizes automatic edge alignment of the joint by manually calibrating the knife edge line and the discharge line. However, the accuracy that this method can ensure depends entirely on the operator's operating skills and level. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the present invention aims to solve the technical problem of proposing an automatic splicing active deviation correction system for a steel cord cutting machine that aligns the head and tail of the cord when splicing the cord.

[0007] An automatic splicing active correction system for a wire cord cutting machine that can solve the above-mentioned technical problems, whose technical solution includes a correction splicing device, the difference being that the correction splicing device includes a joint splicing machine and a joint feeder arranged in front and rear along the cord conveying direction, the rear of the joint feeder is hinged, and the front of the joint feeder is provided with a yaw mechanism that drives the machine body to swing on the horizontal plane around the hinge center under the control of a PLC programmable controller; edge sensor I is arranged at the front of the joint feeder and senses the front and rear edges of the cut cord in a non-contact manner, and edge sensor II is arranged on the joint splicing machine on the front side of the splicing position and senses the rear edge of the spliced cord in a non-contact manner; the yaw mechanism adjusts the joint feeder according to the feedback information of edge sensor I and edge sensor II to align the front edge of the cut cord and the rear edge of the spliced cord and return the tail edge of the cut cord that has swung back to the cutting reference line.

[0008] Furthermore, a left and right edge comprehensive error sensor is provided on the joint splicing machine in front of the edge sensor II. The left and right edge comprehensive error sensor senses the size of the misalignment of the edges on both sides of the spliced curtain in a non-contact manner and feeds back the information to the PLC programmable controller. The PLC programmable controller controls the yaw mechanism to swing the joint feeder and evenly distribute the splicing errors on both sides.

[0009] Preferably, the yaw and rotation mechanism is selected to be a servo-driven electric push rod.

[0010] Beneficial effects of the present invention:

[0011] 1. The automatic splicing active deviation correction system of the steel cord cutting machine of the present invention can greatly improve the qualified rate of steel cord joints.

[0012] 2. The present invention can automatically identify the actual misalignment on both sides of the spliced cord fabrics and distribute the misalignment to both sides of the cord fabrics, thereby directly improving the cord fabric splicing quality. For example, a 1mm offset on one side becomes a 0.5mm deviation after being distributed to both sides.

[0013] 3. The present invention can realize intelligent identification and active deviation correction, which greatly reduces the operation intensity and difficulty. Except for the need to guide the curtain at the new joint, basically no human intervention and observation are required during the operation.

[0014] 4. The sensors used in the present invention are all non-contact sensors and will not cause any resistance to the conveyance of the curtain fabric.

[0015] 5. Cutting the cord easily causes warping due to the tension in the steel wire. The structure of the present invention does not have any narrow passages, so there will be no problems of material piling or blocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of an embodiment of the present invention.

[0017] Figure number identification: 1. Joint feeder; 2. Joint splicing machine; 3. Cutting cord fabric; 4. Edge sensor I; 5. Edge sensor II; 6. Splicing cord fabric; 7. Edge comprehensive error sensor; 8. Electric push rod; 9. Cutting reference line; 10. Cord fabric joint line. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0019] The automatic splicing active correction system of the steel cord cutting machine of the present invention includes a correction splicing device, which includes a joint splicing machine 2 arranged in front along the direction of cord conveying and a joint feeder 1 arranged in the rear. The rear end of the joint feeder 1 is hinged, and a servo-driven electric push rod 8 is provided on the left side of the front of the joint feeder 1. The electric push rod 8 is hinged, and the telescopic rod of the electric push rod 8 extending horizontally to the right is hinged on the joint feeder 1. The telescopic movement of the telescopic rod drives the joint feeder 1 to swing around the rear end hinge center, so that the front end outlet of the joint feeder 1 is aligned with the rear end inlet of the joint splicing machine 2; the rear part of the joint splicing machine 2 is provided with a cord splicing device, and the cord joint line 10 corresponds to the splicing direction of the cord splicing device. The direction of the cord joint line 10 is oblique (tilted forward and left) at an angle to the cord conveying direction, such as Figure 1 shown.

[0020] The front right side of the joint feeder 1 is provided with an edge sensor I4 on the right side of the conveying path of the cut cord 3, and the right side of the joint splicing machine 2 in front of the cord joint line 10 is provided with an edge sensor II5 on the right side of the conveying path of the spliced cord 6. The left and right sides of the conveying path of the spliced cord 6 in front of the edge sensor II5 are respectively provided with edge comprehensive error sensors 7, as shown in FIG. Figure 1 shown.

[0021] The electric push rod 8, edge sensor I 4, edge sensor II 5 and edge comprehensive error sensor 7 are all connected to the PLC programmable controller of the system through relevant lines.

[0022] When the cut cord 3 is delivered to the outlet of the joint feeder 1, the edge sensor I4 senses the instantaneous position of the head edge of the cut cord 3, and the edge sensor II5 senses the position of the tail edge of the spliced cord 6. The edge sensor I4 compares the sensed information with the sensed information of the edge sensor II5 and feeds the comparison information back to the PLC programmable controller. The PLC programmable controller controls the telescopic rod of the electric push rod 8 (servo drive) to perform telescopic movement to adjust the deflection angle of the front outlet of the joint feeder 1 in the horizontal plane (relative to the rear end inlet of the joint splicing machine 2), so that the head and tail edges of the joint of the cut cord 3 and the spliced cord 6 are aligned, as shown in FIG. Figure 1 shown.

[0023] The edge sensor Ⅰ4 can also sense the tail swing phenomenon of the cut cord 3 (that is, the edge sensor Ⅰ4 senses the instantaneous position of the tail edge of the cut cord 3). The edge sensor Ⅰ4 feeds back the tail swing information to the PLC programmable controller, and the PLC programmable controller controls the action of the electric push rod 8 to adjust the deflection of the joint feeder 1, and promptly corrects the tail of the cut cord 3 back to the cutting reference line 9. Figure 1 shown.

[0024] When the joint of the spliced curtain 6 has the phenomenon of curtain ends (due to the soft characteristics of the curtain, there will always be some errors in the parallelogram of the cut curtain 3, and there are actually some errors on the two sides of the joint, which is commonly known as curtain ends in the industry), and the lengths of the two sides of the joint line are not equal, that is, when the joint has a single-sided misalignment, the left and right edge comprehensive error sensors 7 will feed back the comprehensive error perception information after the spliced curtain 6 joint to the PLC programmable controller, and the PLC programmable controller controls the action of the electric push rod 8 to compensate, so that the misalignment on both sides of the cut curtain 3 is evenly divided when the joint is made, so that the influence of the ends in the splicing is reduced by 50%, thereby improving the qualified rate of the curtain joint.

[0025] In summary, the present invention can calculate the size of the edge misalignment based on the measurement values of edge sensor I4 and edge sensor II5, and automatically adjust the outlet position of the joint feeder 1 so that the head edge of the cut curtain 3 is aligned with the tail of the spliced curtain 6 (the tail of the previous piece of curtain 3); the edge sensor I4 can also detect the tail edge of the cut curtain 3, and when the cut curtain 3 has a tail swing, the tail of the cut curtain 3 can be corrected back to the cutting reference line 9 in time; the left and right edge comprehensive error sensors 7 can actively correct the offset that occurs when the curtain is spliced, and can reduce the unilateral misalignment caused by the large and small heads of the curtain.

Claims

1. The automatic splicing active deviation correction system of the steel cord cutting machine includes a deviation correction splicing device, which is characterized by: The deviation-correcting splicing device comprises a joint splicing machine (2) and a joint feeder (1) arranged in front and rear along the conveying direction of the curtain fabric, the rear portion of the joint feeder (1) is hinged, the front portion of the joint feeder (1) is provided with a yaw mechanism which drives the machine body to swing around the hinged center on the horizontal plane under the control of a PLC programmable controller, the rear portion of the joint splicing machine (2) is provided with a curtain fabric splicing device, the curtain fabric joint line (10) corresponds to the splicing direction of the curtain fabric splicing device, and the direction of the curtain fabric joint line (10) is oblique at an angle to the conveying direction of the curtain fabric; The edge sensor I (4) is arranged at the front of the joint feeder (1) and senses the front edge and the rear edge of the cut curtain (3) in a non-contact manner. The edge sensor II (5) is arranged on the joint splicing machine (2) at the front side of the splicing position and senses the rear edge of the spliced curtain (6) in a non-contact manner. The yaw mechanism adjusts the joint feeder (1) according to the feedback information of the edge sensor I (4) and the edge sensor II (5) to align the front edge of the cut curtain (3) and the rear edge of the spliced curtain (6) and return the tail edge of the tail-swinging cut curtain (3) to the cutting reference line (9).

2. The automatic splicing active deviation correction system for the steel cord cutting machine according to claim 1 is characterized by: An edge comprehensive error sensor (7) is provided on the joint splicing machine (2) in front of the edge sensor II (5). The edge comprehensive error sensor (7) senses the misalignment of the edges on both sides of the spliced curtain fabric (6) in a non-contact manner and feeds back the information to the PLC programmable controller. The PLC programmable controller controls the yaw mechanism to swing the joint feeder (1) and evenly distribute the splicing errors on both sides.

3. The automatic splicing active deviation correction system for a steel cord cutting machine according to claim 1 or 2, characterized in that: The deflection mechanism is a servo-driven electric push rod (8).

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