SU1279731A1 - Apparatus for die forging - Google Patents

Abstract

The invention relates to the treatment of metals by pressure, namely, to designs of devices for volumetric deformation. The aim of the invention is to improve reliability, performance and metal saving. The device is equipped with a stand with copy grooves designed to provide a predetermined movement to one of the side sliders. The said slider with the other side slider is mounted for synchronous movement. The device eliminates the power levers in the form of hydraulic cylinders, subjected to complex power loads, which increases the reliability of its work. Upon receipt of parts with holes, waste into the otter is excluded, which contributes to metal saving, 4 or less.

Description

ILS refers to 1: and to the equipment nc nainw) for machining, for example, in particular, to consorting devices for volumetric deformation.

The purpose of the invention is the execution of hardware and hardware, performance and low. metal consumption.

FIG. The device is presented in the initial position of the working bodies along the central plane, a section; Fig 2 is the same in the intermediate position of the working bodies; in fig. 3 - the same, in the position of the working bodies, corresponding to the moment of the end of the working stroke; in FIG. 4, section A-A in FIG. 3

The device contains the upper movable plate 1 with the left 2 and right 3 power levers and the rod 4 bearing the piston 5 pivotally fixed on it, the lower fixed plate 6 with the left 7 and right 8 guiding racks rigidly on it, the bodies 9 and 10 and the half matrix II, cylinder liner 12, movably mounted in housing 10 with semi-matrix 13 rigidly fixed on it, left drive lever 14, pivotally interacting on one side with lever 2, and on the other - with left side slider 15 with punch 16 fixed on it, etc A second drive lever 17, pivotally interacting on one side with the lever 3, through an axis 18, the ends of which are located in the shaped grooves 19 of the rack 8 (one groove is shown, the second is symmetrically located relative to the section plane), and on the other - with the right side slider 20 with a punch 21 fixed on it, a safety valve 22 and a check valve 23, communicated by pipeline 24 on one side with a piston cavity of sleeve 12, ac another with an oil tank 25, a safety valve 26 and check valve 27, communicated by pipeline 28 on one side from w fetter gipzy cavity 12, the other ac - with oil tank 25, the projection 29 fixed on the housing 12. Reference numeral 30 denotes deformable preform.

The devices works as follows.

The deformable workpiece 30, which is a rectangular strip with the original HOLT1 (Fig. 4), is placed on the lower half-matrix 11, and a command is given to make a working stroke. When the upper plate moves downward, the rod 4 with the piston 5 moves the sleeve 12 with the upper half matrix 13 in the same direction through the working fluid before closing the half matrix with the lower half matrix 11. The compression force of the half matrix is regulated by a safety valve 22, using which the excess liquid reaches the set pressure From the piston cavity of the liner is discharged into the oil tank 25 through the pipe 24. At the same time, through the check valve 27 and the pipe 28, the liquid is sucked into the rod cavity of the sleeve 12,

When moving down, the power levers 2 and 3 act respectively on the drive levers 14 and 17, due to which the side sliders 15 and 20, which are movably located in the housing 9, are counter-displaced. At this time, two-sided piercing of the workpiece 30 by side punches 16 and 21 ( Fig. 2). The forces acting on the power and driving levers 2, 14 and 3, 17 are perceived at this stage of deformation by the Racks 7 and 8, respectively, for which a vertical portion of the shaped groove 19 is provided.

After the workpiece has been stitched to the desired depth, the axis 18 of the harmonic articulation of the levers 3 and 17 moves to the non-linear portion of the shaped groove 19, and the lateral ... slider 20 changes the direction of movement to the opposite, and the slider 15 moves in the same direction, the final pass-through firmware of the ax's ax (Fig. 3). In order to prevent otter formation and possible discontinuities of the material, the shape of piercing punch 16 must be appropriately selected (pointed conical end with a sufficiently small taper angle chosen experimentally based on specific conditions). When deformed, the metal fills the cavity formed by semi-matrices and corresponding in lateral dimensions form forgings (Fig. 4).

The firm of the groove 19 and the two types of the lever 2, 14, 3, 17 must be such as to ensure the synchronization of the displacement of the sliders 15 and 20. They can be determined using the element of a mathematical calculation or graphical construction.

Upon completion of the downward movement of the slab, the slide blocks 15 and 20 change the directions of movement to the opposite. In this case, the punch 16 is removed from the pile, and the punch 21 at the first stage calibrates the bore hole on the right side, and at the second, when the axis 18 moves to the vertical part of the groove 19, it is also removed from the workpiece.

When rod A and piston 5 move upward, sleeve 12 also moves up to stop in projection 29, freeing workpiece 30 to remove it from semi-matrix 11. Fluid pressure in rod end of sleeve 12. Can be adjusted by safety valve 22. Excess fluid in this cavity is drained through pipe 28 to the oil tank 25. At the same time, the fluid is sucked into the piston cavity of the sleeve 12 through the check valve 23 and the pipe 24.

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Form

the invention

Device for volumetric deformation, containing a movable upper plate with power levers and a piston of a power cylinder hinged on it, a fixed bottom plate with guide posts: - and housings in which the side sliders are movably arranged with deforming tools, hinged to the force levers by means drive levers, a matrix block consisting of upper and lower semi-matrix, the last of which is mounted on the bottom plate, and the upper one is connected to the closing mechanism of semi-matrix, in the form of a power cylinder associated with a power source, characterized in that, in order to increase reliability, productivity and economy of metal, it is equipped with a stand with copy grooves installed on the bottom plate, and the power and drive levers of one of the side the sliders are hingedly connected to each other by an axis disposed in said copy grooves.

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Claims (1)

Claim The shape of the groove 19 and the length of the levers 2, 14, 3, 17 must be such as to ensure synchronized movement of the sliders 15 and 20. They can be determined using elementary mathematical calculation or graphical construction. At the end of the downward movement of the plate 1, the sliders 15 and 20 change the direction of motion in the opposite direction. In this case, the punch 16 is removed from the workpiece, and the punch 21 in the first stage calibrates the stitched hole on the right side, and in the second, when the axis (5 18 moves to the vertical section of the groove 19, is also removed from the workpiece. When the rod 4 and piston 5 20 move upward, the sleeve 12 also moves upward as far as it will go into the protrusion 29, releasing the workpiece 30 to remove it from the half-matrix 11. The pressure of the liquid in the rod cavity of the sleeve 12 can be adjusted by the safety valve 22. The excess liquid in of this cavity is drained through the pipe 28 into the oil tank 25. At the same time, the liquid is sucked into the piston cavity of the sleeve 12 through the check valve 23 and the pipe 24. A device for volumetric deformation, comprising a movable upper plate with power levers pivotally mounted on it and a power cylinder piston, a fixed lower plate with guide racks and housings, in which the side sliders with deforming tools are movably located, articulated with the power levers by means of drive levers, a matrix a block consisting of upper and lower half-matrices, the last of which is mounted on the lower plate, and the upper is connected with the closing mechanism of the half-matrices, made a cylinder associated with the power source, characterized in that, in order to increase reliability ·; It is equipped with a rack with copy grooves mounted on the bottom plate, and the power and drive levers of one of the side sliders are pivotally connected to each other by an axis located in the specified copy grooves. f FIG. 1 127973 1 Aa