RU2045409C1 - Device for feeding billets to die - Google Patents

Abstract

FIELD: mechanical engineering. SUBSTANCE: device has a pair of levers 1 mounted on spindle 7 and extending through plate 3 of die. Counterweight 13 is mounted on upper ends of levers 1 and other pair of levers 5 is seated onto other ends of levers 1 through spindle 6. Levers 5 have segment-shaped portions 9 for receiving billets 10. Both pairs of levers are provided with stroke limiting members. When billets 10 are put into segments 9, levers 1 are pivoted on spindle 1 against force created by counterweight to place billet 10 in working position. Upon termination of straightening and stitching processes, billet 10 is retained in die upper part and is withdrawn through window. Levers 1, 5 are returned to the initial position. EFFECT: simplified construction, increased efficiency and enhanced reliability in operation. 3 cl, 3 dwg

Description

 The invention can be applied in stamping operations on presses.

 A number of devices are known for feeding blanks into a stamp [1,2]. These devices are structurally complex, require special drives (electric motors, gearboxes), a large area for placement, and are specific for their use at certain objects.

 The well-known "stamping device" [3] (prototype) is much simpler than the above devices and more convenient to use, given its versatility for many dies and the lack of machine drives. At the same time, it also has the negative sides, namely, that it is necessary to have a sufficient distance between the upper and lower parts of the stamp in order to provide the necessary slope of the slide arms for feeding the blanks under their own weight into the stamp. And this condition cannot be implemented in a number of stamps due to the characteristics of the presses. In addition, when folding the device at the time of stamping (lower position of the upper half of the stamp) due to overlapping on the accumulated envelope from stamped blanks, breakage of the levers may occur.

 The aim of the present invention is to increase the safety of work and the expansion of technological capabilities when feeding blanks into a stamp, which is achieved by adding to the device units for regulating the rotation of the fixing elements, each of which is presented in the form of 2 half couplings, interconnected by means of end teeth. The latter are rigidly connected to one of the pairs of additional levers mounted at an angle relative to the rotary levers, the axes of which are fixed on the upper plate of the stamp. Adjustable counterweights are mounted on additional levers. Moreover, the device is equipped with adjustable stops interacting with levers in their extreme positions. Restriction pins mounted on the articulated ends of the swing arms are also introduced.

 Figure 1 schematically shows the proposed device at the time of installation in the segments of the levers of the workpiece and in the position before stamping; figure 2 is a view along arrow A in figure 1; figure 3 view along arrow B in figure 1.

 The device consists of a pair of two-arm levers of rectangular cross section 1 mounted on an axis 2 passing through the plate 3 of the stamp. At the end of the levers 1 (at the intersection of the shoulders), restrictive pins 4 are fixed. The second pair of levers 5 also of rectangular cross section through the axis 6 and the restrictive pins 7 interacts with the first pair of levers 1. On the pair of levers 5, segments 9 are mounted for adjusting gear couplings 8 for laying blanks 10.

 Adjustable stops 11, 12 are mounted on the upper plate of the stamp 3 for fixing the first pair of levers 1 in a predetermined position. At the other end of the first pair of levers 1, counterweights 13 are mounted that have the possibility of adjustment movement. The force from the counterweight should be such as to hold in position 14 the entire structure of the device, and when laying the workpiece 10 on segments 3, the device, rotating on the axis 2 under the action of its mass, should occupy the working position 15.

 The device operates as follows.

 As an example, taken corrective-piercing stamp 16, on which the proposed device is mounted. In position 14 of the device, the workpiece 10 is laid on segments 8, and therefore, under the additional force arising in excess of counterweight 14, the first pair of levers 1 on axis 2 is rotated to limiter 11. Simultaneously with levers 1, levers 5 move to working position 15 by installing blank 10 for firmware and editing. With the inclusion of the stroke of the slider-press and the movement of the upper part of the stamp down, the device is lowered, laying the workpiece 10 on the punch 17.

 After removing the workpiece 10 and the output of segments 9 on the flats 18, counterweight 13, the device returns to position 14.

 At the end of the stroke of the press slider, the stitched and straightened workpiece is removed from the top of the stamp through the side window 19.

Claims (3)

 DEVICE FOR SUBMITTING PREPARATIONS IN A STAMP, comprising two pairs of pivoting levers fixed on a stamp with the possibility of interaction between each other and workpiece fixation elements conjugated with levers, characterized in that it is equipped with nodes for adjusting the rotation of the fixation elements, additional levers and balances, each the node for controlling the rotation of the fixing elements is made in the form of two coupling halves, interconnected by means of end teeth, rigidly connected to one of the pairs of additional levers mounted at an angle relative to the pivoting levers, counterweights are mounted with the possibility of adjusting movement on the free ends of the additional levers, and the axis of the pivoting levers are fixed to the base plate of the stamp.  2. The device according to claim 1, characterized in that it is equipped with restrictive pins mounted on the interconnected ends of the rotary levers.  3. The device according to PP.1 and 2, characterized in that it is equipped with adjustable stops mounted on the stamp plate with the possibility of interaction with levers in their extreme positions.