SU863087A1 - Arrangement to slide press for punching hollow section - Google Patents

Description

(54) DEVICE TO A CRIMINAL PRESS FOR PUNCHING AN EMPTY PROFILE

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The invention relates to the processing of metals by pressure, in particular, to devices for punching holes in a hollow profile.

A device for a slider press for punching a hollow profile is known, comprising a housing, an actuator, as well as a perforation assembly mounted on the housing including an upper and lower plates, a die and a block of punches 1.

A disadvantage of the known device is that it is impossible simultaneously with tg punching of holes to make bending of the hollow profile.

The aim of the invention is to provide a bending profile simultaneously with punching.

This goal is achieved by the fact that the device to a slider press for punching a hollow profile, comprising a housing, an actuator, and also a punched assembly mounted on the housing, including an upper and lower plates, a die and a block of punches, is provided with a bending assembly on the root in the form placed one above the other supports and one mobile support from the copier, and the drive is made in the form

a gear mechanism comprising a gear wheel and two gear racks, one of which is associated with a slider, and the other is fixed on the bottom plate of the punching assembly and associated with a copier of the bending assembly.

In addition, the device is equipped with two rows of rolling bearings, one of which is mounted on the block of punches on the slider side, and the other is placed between the case and the bottom plate of the punching assembly.

The matrix is equipped with a console, which sets a free end under the top of the fixed supports.

In this case, the device is equipped with an adjustable latch mounted on the housing to limit the bending angle.

FIG. 1 shows the proposed device with a partial cut (the initial upper position), a general view; in fig. 2 - the same, with the lower operating position of the press.

Claims (4)

The device includes a housing 1 mounted on the press table; A casing assembly is mounted on the housing containing the upper plate 2 and the lower plate 3 on which the matrix 4 and puller 5 are secured by columns 6, which are the guides for the punch holder 7 with the punch 8. Between the puller and the punch holder, there are springs 9 and limiting screws 10. The bottom plate is mounted on the housing by means of a series of bearings 11. The drive for moving the hole-piercing unit with the workpiece is made in the form of a gear wheel 12 and two gear racks, one of which 13 is connected to a press slider, and the other 14 is closed captivity to the bottom plate of the punching unit. The top plate, attached to the press slide, interacts with the punch holder by means of a series of rolling bearings 15. At the other end of the housing, a bending unit 16 is mounted, consisting of a stand 17, on which two bending fixed supports 19 and a lever 20 bearing movable bending support 21 with axis 22 (supports 19 and 21 can be made in the form of rollers). A toothed rack 14 is connected by a copier 24 through a roller 25 with a movable bending support 21 through a tug 23cb. A puller assembly of a finished product from a matrix 4 is mounted on case 1, which includes a puller 26, an emphasis 27, a roller 28 and a return spring 29. For limiting angle bending on the arm 30 is fixed adjustable clamp 31. The device operates as follows. When the press slider 32 is raised, the hollow profile 33 is pushed onto the die 4 all the way into the protrusion, after which the press stroke is activated. When the slider and the toothed rack 13 fixed on it are moved down, the gear wheel 12 starts to rotate and moves the gear rack 14 together with the hole punch unit and the die towards the bending unit 16. The copier 24 rotates the lever 20 with the bending support 21 in the direction transverse to the profile whereby the hollow profile 33 is bent. The quality of bending in the initial stage depends on the lead-in part of the copier 24, therefore the transition from the horizontal to the inclined plane in the wedge copier is made smooth. As a result, the abrupt jump of the stresses at the beginning of the bend is eliminated, and the rectangular hollow profile bends without indentations, with a smooth transition from the straight section to the radius (in addition, a smooth transition, for example, at the ski improves snow gliding). The matrix 4 has a cantilever portion protruding towards the bending assembly, its end is located under the center of the upper fixed support (i.e., in the zone of deformations of the profile walls during its bending). Such an embodiment of the matrix makes it possible to use it as a mandrel, ensuring the stability of the walls of the bendable profile. The elimination of the voltage jump at the beginning of the bend and the use of the mandrel-matrix makes it possible to bend the hollow rectangular profiles without special fillers. At the end of the slide stroke, the punches reach the wall of the hollow profile and pierce the holes. The back end of the hollow profile blank at the end of the slider stroke reaches the puller 26, which drops over the end of the hollow profile under the action of the spring 29. When the slider reverses, the punch node moves to its original position and the hollow profile blank remains in place due to the puller 26. the upper position, the blank of the hollow profile, bent and with punched holes, is easily removed from the die, which has a slight taper in length. Stop 27 through the roller 28 squeezes the puller 26 to its original position, freeing the way for the installation of the next workpiece. In order to limit the bending angle of the hollow profile, an adjustable latch 31 is installed, which allows to increase the accuracy under the condition of variation in the mechanical properties of the hollow profile. The use of the proposed device allows simultaneously with punching holes in the hollow profile to bend it without the use of special fillers. Claim 1. Device for a slider press for punching a hollow profile, comprising a housing, an actuator, and a hole punch assembly mounted on the housing, including an upper plate and a BOTTOM plate, a die and a block of punches, characterized in that, in order to provide a bending profile simultaneously with the piercing , it is equipped with a bending unit mounted on the body in the form of supports placed one above the other and one support moving from the copier, and the drive is made in the form of a gear mechanism including a gear wheel and two gear racks, one of which is associated with the slider and another fixed to the bottom plate dyro piercer unit and associated with the copier of the bending assembly. 2. The device according to claim 1, characterized in that it is provided with two rows of rolling bearings, one of which is mounted on the block of punches on the side of the slide, and the other is placed between the case and the bottom plate of the punching assembly. 3. A device according to claim 1, characterized in that the matrix is provided with a console, which extends the free end under the top of the fixed supports. 4. The device according to claim 1, characterized in that it is provided with an adjustable latch mounted on the housing to limit the bending angle. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 264325, cl. B 21 D 28/28, 1968.