SU309991A1 - DEVICE FOR CUTTING DETAILS WITH A SMOOTH CONTOUR FROM SHEET MATERIAL - Google Patents

Description

The invention relates to equipment for cutting or profile cutting of materials by continuously moving endless band knife.

Devices for cutting parts with a smooth contour from an i-raw material are known, comprising shchivs mounted on a frame, carrying ribbon knives, installed with the possibility of changing the distance between the branches of the tapes, the device for feeding the material "drive."

The disadvantage of working on these devices is the need to apply stencils or use patterns to define the contours of the parts, while cutting is done only by one branch of the knife.

In order to increase the productivity of labor in the proposed device, the pulleys of the ribbon knives are mounted on plates, mounted for movement and sanding, which are driven by an "opshack" support rollers, which provide for the changing of the distance between the branches of the belts. In addition, the device for material handling is made in the form of clips mounted on a carriage, driven by a lever-and-gear transmission controlled by a copier.

the parts cut by the device in FIG. one; in fig. 4 — device with rectilinear reciprocating movement of plates; in fig. 5 shows the parts cut by the device in FIG. four; in fig. 6 is a section along BB in FIG. one; in fig. 7 is a section along BB in FIG. 2; in fig. 8 shows a cross section along YY in FIG. 2

The proposed device consists of a belt knife mechanism /, consisting of two movable upper and lower plates 2 and 3, on which shchiki 4 and 5 are mounted.

Between the cheeks there is an endless belt across / to 6, receiving rotation from the drive pulley 5.

Support plates (pl blocks) 7 are also mounted on plates 2 and 3 to change the distance between (branch MI of the band knife and sharpener 8.

20 With the aid of a spring-loaded pulley 4, a constant tension of the band knife 6 is carried out, and the synchronous rotation of the plates 2 and 3 with this knife takes place through the intermediate shaft 9 to the scraper 10 and the toothed sector

25 and from the copier 12, sitting on a cam shaft 13.

16 movable carriage 19 mounted on under; movable with lasks 20.

The foot of the material 15 is clamped by the rods 16 and 18 by turning the eccentrics 21 connected to the pull 22 via the lever-rack system 23 from the copier 24 sitting on the camshaft 25. The expansion of the rods 16 and 18 is carried out by springs 26.

The clamped stack of material / 5 is fed into the cutting zone by moving the movable carriage 19 along the rollers 27 mounted on the eccentrics 21, through the lever system 28 from the cam 29 sitting on the cam shaft 25.

To prevent the knives of the vertical knives 30 and 31 from cutting into the product when cutting the material foot, the table 17 mounted on the base skid 20 is radially retracted from the copier 5c, which also sits on the shaft 25, by means of the lever system 32.

The cam loops 13 and 25 are rotated from the actuator 34 by means of gears 35.

The finished product is removed by the grippers 36, while the lower gripping jaw 37 has a finger 38, which, during gripping, jumps out under the action of a spring from under the guide 39, with the result that the product is clamped between the jaws. When the sponges return to the initial position, the finger runs into the oblique support 40 and the sponge 37 onyiCKaeT 37. down. For fixing the jaw 57 in the lower position there is a plate spring 41.

The knives of the vertical knives 30 and 31 consist of cantilever guides 42 on which the machine moves with a vertically vibrating flat blade knife 43. The machine has a grip 44 intended for removing the corner waste, made in the same way as the hooks 36. In the process of cutting the corner waste, the material is pressed CLAIM 45.

To change the distance between the branches of the ribbon knife 6 during the cutting process, there are copiers 46 associated with the supporting blocks 7.

To clamp the foot of the material during cutting with a band knife, there is a clamp 47 which moves in the guide bushes 48. The constant tension of the band knife (including when changing the spacing of the branch distance) is carried out by floating the cheek 4 with the help of a spring 49.

The operation of the device (see Figs. 1 and 2) when cutting a part E is included in the following.

The foot of the material 15 is clamped between the shanks 16 "JS and fed to the step that determines the size of the part, and to the cutting zone by moving the movable carriage 19 along the rollers 27. After that, the foot is released and the carriage retracted to its original position. In the foot cutting zone, the clamps 47 are clamped. The part is cut at two times by TWO branches of the belt knife.

In the process of turning the knife belt mechanism, the knife belts 6 move from the initial position E (see Fig. 2) to the position G. After the working stroke of the belt knife 1 is completed, the table 17 with the material 15 lying on it is retracted, the cut parts with central waste the grippers 36 are removed, and the knives and the grips of the knots of the knives 30 and 3J, which perform a rectilinear reciprocating motion, cut off the angular waste. Then, the feed table and the belt knife mechanism are returned to their original position.

When cutting a part, the distance between the retracting branches remains constant, if during the cutting process the distance between the cutting branches changes, then parts of a more complex configuration are obtained. The parts cut by the device (see Fig. 1), and

a profile bounded by two curves whose centers of curvature are located on the axis of rotation of the plates of the belt knife mechanism /. A variant is proposed for arranging a device (see FIG. 4), which differs from the previous one in that the plates have a translational straight-line movement perpendicular to the direction of the material feed. In this case, the plates 2 and 3 € of the band knife m. 6 are mounted on horizontal guides 50

and are moved with the help of driving spindle 51 (in FIG. drive not shown). During the cutting process, the contour of the band knife is moved transversely with the plates, and at the same time the support rollers 7 associated with the copiers 46, the distance between the cutting and branches is changed. The view of parts 3 obtained with such a motion pattern is shown in FIG. 5. Details can be obtained in various lengths and shapes, and the profile

they are limited to two periodic curves a and b.

Subject invention

Claims (2)

1. A device for cutting parts with a smooth contour of sheet material, comprising pulleys mounted on a frame, carrying belt knives, installed with the possibility of changing the distance between branches of tapes, a device for feeding matdrial and a drive, characterized in that, in order to increase productivity, the pulleys of the tape knives are mounted on plates that are moped with the possibility of moving and supporting rollers controlled by a copier, which provide for changing the distance between the branches of the belts. 2. The device according to claim 1, characterized in that the material supply device is made in the form of clamps mounted on a carriage driven by a rack and pinion gear controlled by a copier. 9 Yu L 27 2/26 22 21 162615 I I III / / / p 4 Remajib D