FI82642C - Method for automatic dubbing and dubbing machine for the execution of the method - Google Patents

Description

1 82642

A method for automatic studding as well as a studding machine for performing the method

The present invention relates to a method of fully equipping a vehicle tire with studs by registering the positions of the stud holes in the tire in a computer system that positions one or more studs and initiates studding. The invention also relates to a riveting machine for performing the method.

10 Winter tires are equipped with tire studs to improve the grip of the tire when the road is covered with snow and ice. The studding of the tire is done by hand today. The normal procedure for studding a ring is to hang the ring above the anvil, after which the nas-15 feeder directs the ring so that the pre-made hole enters directly under the pin gun, which introduces the ring pin into the pre-made hole by means of an air cylinder.

In manual studding, the stud can make 20 heavy and frequent lifts in an inappropriate sitting position. In addition, the stud 's vision is severely strained':. in positioning the pin hole below the pin plug and there is-: * a mass risk of accident because the pin can be thrown away if; ** positioning fails.

: *, · 25 In order to overcome the above-mentioned disadvantages, a method and a machine for fully automatic studding of a vehicle tire have been described, which method achieves a significantly higher capacity than manual studding. Thanks to the improved positioning, the quality of the studs will also be more even.

To this end, the invention has the features set out in the following claims.

The invention will be explained in more detail in the following detailed description and with the aid of the accompanying drawings • - 35, in which Figure 1 shows a view from above the machine,:. Fig. 2 shows a side view of the pin unit and 2 82642 Fig. 3 shows a schematic section of a camera lighting device according to the invention.

In the machine according to the invention, the ring 1 is attached to an expandable rim 2, where it is filled with air and 5 is made to rotate. During the rotational movement, the surface of the tire is read by a diode system camera that detects pin holes. The coordinates of the pin holes are registered in a computer system that positions the pin guns of one or more pin units 4 and provides a signal for studs when the pin hole of the nas-10 bypasses the pin guns.

In order to perform these functions, the machine according to the invention has the following configuration.

The stand 5 (Fig. 2) has a rotating, expanding rim 2 suspended in a vertical alignment. For the rotations 15, this rim 2 is connected to a permanent magnet DC motor 6. An elevator table 7 (Fig. 1) is arranged directly below the expandable rim 2, which is provided with support members in the form of rollers. When the table 7 is lowered to its lower position, said rollers are at the same height as the rollers of the feed conveyor 8. In the upper position, the elevator table 7 is arranged in such a way that the ring 1 supported by it can be gripped by causing the rim 2 to expand.

The camera 9 is mounted on a lighting unit 10 (Fig. 3), which illuminates the circumference of the ring 1. The lighting unit 10 25 is supported by a bracket (not shown) and comprises a tube 11 through which the camera "sees" the surface of the ring, on one or more sides of this tube 11 one or more floodlights 12 are mounted which transmit their light through one or more slots 13 in a cylindrical in Fig. 14 30 towards one or more mirrors 15 in the dome, which mirrors are at a 45 ° angle so that the headlights hit the surface of the ring in the circumferential direction, the tube 11 of the lighting unit 10 is arranged centrally in a dome open from the end facing the surface of the ring. 10 35 The required light output has been achieved and the effect of general lighting has been eliminated. find order.

The camera 9 is connected to a computer system where the signals given by it 5 are received. The computer processes the received image and the center of gravity is calculated. The computer then stores the axial and radial coordinates of the pin holes until studding occurs.

One or more pin units 4 are arranged close to the expandable rim 2. In the embodiment of the invention shown in the drawing (Fig. 1), the machine comprises two pin units 4.

Each pin unit 4 is supported by a holder 16 so that the pin gun 17 of the unit can be brought into position close to the surface of the ring. To bring the pin gun 17 against the surface of the ring, each pin unit comprises four alignment units arranged on said bracket 16, two of which 18, 19 are driven by DC motors with permanent magnetized pulse sensors and two pieces 20 20, 21 are pneumatically operated.

; Y: Of these, a first alignment unit 18 is provided. mainly the horizontal movement of the pin gun 17. · * ·. towards or away from the surface of the tire.

• The second alignment unit 19 is arranged to move *. I 25 pin guns 17 in the axial direction of the ring, so that ‘· the gun will be located in the center of the pinhole weight point.

The third alignment unit 20 is arranged to insert the pin gun 17 into the ring 1.

30 In order to obtain the maximum possible lifting capacity of the machine, the ring 1 is made to rotate at a speed of n.

1.2 rpm throughout studding operation. Since the ring rotates all the time, the pin gun must be. . arranged to monitor the rotation of the ring when the pin is inserted into the pin hole. For this purpose, a fourth alignment unit 21 is provided, which is arranged in said second alignment unit 19 for turning the pin gun 17 arranged in the third alignment unit 20.

4,82642 A vibratory feeder 22 is mounted to feed pins to a pin feeder 23 which blows pins through a hose 24 onto a pin gun 17 between each stud, so that the gun always has a pin.

5 The automatic stud described above works as follows.

The ring 1 is fed on a roller track 8 towards an elevator table 7, where it is centered. The elevator table 7 then raises the ring 1 to a higher position near the expandable rim 2. Rim 2 expands in the center of the tire and thus adheres to the tire, which is then inflated. The elevator table 7 lowers to its lower position at this time.

The lighting unit 10 with its camera 9 is driven to its front position close to the surface of the ring, after which the ring is made to rotate by a motor 6. A pulse sensor is mounted on the axis of the expanding rim 2 and indicates the radial coordinates of the pin holes.

The camera 9 now begins to read the surface of the ring and gives signals to the computer system where the coordinates of the pin holes-20 are stored. The first lining unit 18 positions the base station in the horizontal direction of the pin unit 4 to a certain position relative to the wall surface. The second alignment unit then positions it axially along the surface of the ring relative to the stored data to be located in the center of the first 25 pin holes. A moment before the pin hole, a signal is given for studding and the studding sequence begins.

The third alignment unit 20 inserts the pin gun 17 into the pin hole and at the same time the fourth alignment unit 21 causes it to rotate with the ring 1 while the studing is performed. When this operation is completed, the pin gun 17 is pulled out of the ring 1 and returns to its starting position.

The pin unit 4 is then positioned for the next pin hole, and the whole process is then automatically repeated 35 until all the pins are inserted in the ring.

When the ring is already studded, the elevator table 7 is raised again to its upper position, whereby air is removed from the ring s 82642 and the expanding rim is made to release its grip. The elevator table is lowered to the down position and the studded tire can now be transported out of the machine on a roller track, after which the studless tire is transferred to the machine.

The invention ς> η thus provides a method and a machine which performs the studding of a vehicle tire completely automatically and with a large capacity.

Claims (6)

A method of automatic dubbing of vehicle tire (1), wherein the tire (1) with preloaded heels for studs 5 is caused to rotate about its axis by a holding member (2), characterized in that an expanding rim (2) engages the tire (1), which is filled with air and continuously rotated, that the tire pattern is illuminated tangentially with an illumination unit (10), that the positions of the double heels in the tire surface 10 are recorded by a camera (9), which emits signals to a computer system which stores the coordinates for the double heel, the computer system, after storing the coordinates, positions a double gun (17) at a position adjacent to the tire surface, and then for each double heel, the gun 15 (17) positions axially along the tire surface to a position opposite to a double heel, and that the double gun ( 17) is brought into the rotation of the tire (1) during the application of a stud, after which the gun (17) is returned to its starting position. 2. A method according to claim 1, characterized in that a pulse sensor mounted on the shaft of the rim (2) indicates the radial coordinate of each double-heel. Machine for automatic dubbing of vehicle tires (1) with pre-recorded heels for studs for carrying out the method according to claim 1 comprising a rotatable holder (2) for the tire (1) and at least one stud unit (4) characterized in that a rotatable expanding rim (2) is arranged to clamp, fill with air and continuously rotate the tire (1); A camera (9) mounted adjacent to the rim (2) mounted on a lighting unit (10) for recording the double-heel coordinates stored in a computer system, the double-gun (17) being arranged to be positioned and initiated by signals from said computer systems; The illumination unit (10) is arranged to transmit its light so that the light beams strike the tire pattern tangentially along the periphery of the tire; that a computerized image processing system (9) is provided for recording and storing the coordinates of the tire (1) in advance of the tire (1) and positioning the tire gun (17) of the tire unit (4) in the center of each hdl and initial application of a stud therein; and that the stud gun (17) is arranged to follow the rotation of the tire (1) while a stud is applied and thereafter returned to its initial position. Machine according to claim 3, characterized by a first linear unit (18) for moving the double pistol (17) to a position adjacent to the tire surface, a second linear unit (19) for axial movement of the double pistol (17). to a position in the middle of a stud & l, a third linear unit (20) for inserting the stud gun (17) into the stud & a fourth linear unit (21) arranged to cause the stud gun (17) to follow the rotation of the tire while a stud is applied and then return it to its initial position. 5. A machine according to claim 3, characterized in that the illumination unit (10) comprises a tube (11) which encloses the lens of the camera (9), whereby at least one headlight (12) is mounted on the tube 25 (11). said headlamp (12) being arranged to transmit its light through at least one slot (13) toward one or more mirrors (15) angled 45 ° so that the light beams hit the deck surface tangentially. 6. Machine according to claim 5, characterized in that said slot (13) is arranged in a cover (14) which encloses said mirrors (15) and the end of which is directed towards the tire (1) is open. Il