RU2001332C1 - Method and device for finishing ends of rubber-cloth conveyer belts - Google Patents

Description

The invention relates to the assembly and repair of conveyor belts and can be used to cut the ends of conveyor belts.

A known method of cutting the ends of rubber-fabric conveyor belts, including securing each end of the belt to a support table and then cutting a series of grooves at each end of the belt from the end of the belt along the longitudinal soy of the belt by a rotating milling cutter along the length of the joint, the grooves being cut along the width of the joint with inclined to each other with walls and with a large base, facing the other end of the tape with the formation of tombs between adjacent grooves.

The disadvantage of this method is the lack of assembly accuracy and, therefore, low joint strength,

A device for cutting ends of rubber-fabric conveyor belts is known. It is a device comprising a support table for laying on it a cut end of a belt, a carriage with a drive on which a cutting tool is mounted, including a shaped cutter with a drive for rotating it.

A disadvantage of the known device is its high material consumption, due to the fact that the processing of the end is carried out immediately over the entire width of the tape, and therefore the cutting tool has large dimensions and weight.

In Fig. 1 shows a method of cutting the ends of rubber fabric conveyor belts; in FIG. 2 - connection of the ends of the tape processed by the proposed method: in FIG. 3 is a front view of the device; in FIG. 4 is a top view of the device; in FIG. 5 is a section AA in FIG. 4 (fastening of the cutting tool); in FIG. 6 - device for locking the carriage relative to the carriage - place B in FIG. 4; in FIG. 7 - the end of the rubber band, processed by the proposed method using the proposed device.

A device for cutting the ends of rubber-fabric conveyor belts, by means of which the proposed method is carried out, includes a support table 1 with four racks 2, on which are installed adjusting threads (nuts 3, supporting a rectangular frame made of four rods 4. The latter includes four supports 5c holes into which the racks 2 enter. In addition, a strip b with a slot is fixed to the frame 4.

In the supports 5, two tube-shaped guides 7. are mounted parallel to each other 7. on which they can be moved along the supporting table 1

a carriage 8 is mounted, which is a rectangular frame, at the ends of which four bushings 9 are placed with the possibility of movement along the guides 7.

A carriage 10 is mounted on the carriage 8 with an engine 11 mounted on it. In addition, the carriage 10 is equipped with two trunnions 12, the bearings of which have a shaft 13 with a cutting tool mounted on it, including 3 circular milling cutters 14 with a trapezoidal cross-section, separated from each other by washers 15 The rotation of the cutters 14 is transmitted from the engine 11 by means of a belt drive 16.

5 To move the carriage 8 along the table 1 along the guides 7 on the carriage 10, a screw 17 is fastened, passing through the slot of the bar 6 and ending with a drive handle 18 with a handle. One or two plates 19 are also placed on the support table 1. They are designed for fastening on it with screws 20 of the machined end of the rubber band 21, including fabric spacers 23 located between the rubber plates 5 and 23. To set the necessary clearance between the cutters 14 and the support table 1 the latter is attached two vertical rulers 24. In order to fix the cart 10 relative to the carriage

0 g, a locking device is installed on the first of them, including a spring 25 and a pivotally mounted lever, the working end of which enters one of the slots made on the side of the carriage 8.

5 The method is implemented as follows.

On the support table 1, the end of the conveyor belt 21 to be cut is laid and secured with a plate 19

0 by screws 20. The trolley 10 is installed in a position in which the cutters 14 are above one of the sides of the tape 21. By turning on the motor 11, the cutters 14 are rotated, after which the frame 4 with

5 adjusting nuts 3 are lowered onto the tape 21 and the cutters 14 cut the first three longitudinal grooves along the side of the tape, the depth of which is equal to the total thickness of the upper rubber lining 22 and the fabric frame

0 of the tape 23. The length of the ditch is equal to the required length of the joint and is provided by the rotation of the handwheel 18, which leads to the movement of the carriage 8 along the guides 7 and the corresponding movement of the cutter

5 14 the length of the tape If the processed tape has a significant thickness, the longitudinal grooves in it are made in several passes, sequentially after each pass of lowering the cutter to the desired position, and the magnitude of their vertical movement is determined using rulers 24.

After the first three grooves are made, the carriage 10 is moved to the right position, in which one of the cutters 14 (in Fig. 5, the right) is located above the last of the grooves already obtained. Then, the cutting process is repeated, said cutter moving along a previously machined groove (thereby centering the position of the tape), and the other two cutters form new grooves. These operations are performed until the longitudinal grooves are cut across the entire width of the tape.

Similarly, but on the reverse side and with an offset along the width of the flax, you are the width of one cutter, the other end of the tape is processed.

In order that the machined ends of the tape can be aligned with each other, the width of the grooves at the base (Fig. 1) is equal to the width of the top of the crest formed between them, which is ensured by a corresponding set of washers 15 located between the cutters 14

The number of cutters 14 used in the proposed device may be different. In case the material of the tape requires great efforts or cutting, the number of cutters is reduced to two. Otherwise, the number of cutters can be increased to 4-5 or more.

The ends of the tape processed by the device described above are connected by any of the known methods, for example by gluing or by hot vulcanization.

To implement the proposed method for cutting the ends of a conveyor belt with a width of 800 mm (with a joint length of up to 1000 mm), a device was used including three 120 mm diameter circular cutters with a trapezoidal cross-section (Fig. 1), cylindrical on the shaft 13 (Fig. 5) parts of which are equal to 10 mm, and the angle formed by the side cutting surfaces of each cutter is 40 °. This allows using the specified cutting head to make about 50 grooves of the corresponding trapezoidal cross-section on the machined end of the tape 5 Yeni (cut two or three grooves at the same time), spending no more than 40 minutes on it.

In this case, the power consumption at 0 water of the cutting head does not exceed 0.5

kW and the total weight of the entire device is 40 kg,

which provides mobility of the latter

Feasibility

the proposed method and device for it

5 implementation is achieved as follows: The process of cutting the abutting ends of the tape in several passes can dramatically reduce the total cutting force and weight of the device: approximately 10-15

0 times in comparison with known devices for cutting the ends of the tape in one pass.

Such a large reduction in the material consumption of the proposed device allows

5 greatly reduce the complexity of the process of cutting the tape, eliminate the need for use for manipulating the device to transfer it from one conveyor to another, installation, commissioning, etc.)

0 special lifting mechanisms and, ultimately, bring the actual processing time of a pair of abutting ends of the tape to the duration of a similar process using a single pass device 3.4.

In addition, the application of the proposed method can significantly increase the strength of joints due to an increase in the total area of glued surfaces and the almost complete disappearance of normal stresses adversely affecting its elements (56) UK application Ne Cl F 16 G 3/10, 1975.

5 USSR Certificate of Authorship

- No. 765003, cl. B 29 D 29/06. 1980

Claims (3)

1. A method of cutting the ends of rubber-fabric conveyor belts, including securing each end of the belt to a support table and then cutting a series of grooves at each end of the belt from the end along the longitudinal axis of the belt by a rotating milling cutter along the length of the joint, the grooves being cut along the width of the joint with walls inclined to each other and with a large base facing the other end of the tape to form ridges between adjacent grooves, characterized in that. in order to improve assembly accuracy and joint strength, the smaller base of each groove is cut equal to the width of said ridge with an angle of inclination between the walls 40. 2. A device for cutting ends of rubber-fabric conveyor belts, comprising a support table for laying on it the cut end of the belt, a carriage with a drive, on which a cutting tool is mounted, including a shaped cutter with a drive for rotating it, characterized in that, in order to reduce the mother /4 0 5 Q 0 5 In terms of simplicity and simplification of operating conditions, it is equipped with a frame of four rods interconnected and mounted on racks of the support table with means for lifting the frame relative to the support table in the form of nuts, the frame is made with guides for moving the carriage along them along the length of the joint, and equipped with a trolley with a locking element mounted on the carriage with the ability to move it in the transverse direction relative to the cut end, and the cutting tool is made in the form of a set of identical disk cutters PARTICULAR from each other coaxially disposed with their washers, the thickness of each of which is made equal to the width of the cylindrical portion of the cutter disk, the profile of which is formed with a trapezoidal form an angle between the side cutting edges 40 equal. 3. The device according to claim 2, characterized in that on the side of the carriage parallel to the axis of the cutters, grooves are made with a step equal to the width of the cylindrical part of the cutter disk, and the locking element is made in the form of a lever spring-loaded to the trolley, one end of which is pivotally connected to the trolley and the other end is installed in one of said grooves. Fig, / 22 23 HER reWyyjrygVYVrygVgVX CHU / 7 I J2 1 4 7 a // / gz / in m -L / 00 FIG 2 e Fig.Z / 52 Wig.b