SU774964A1 - Device for placing and removing dies - Google Patents

Description

one

The invention relates to the field of mechanical engineering, namely to press-forging equipment.

A device for mounting and removing dies to a press with a pneumatic-hydraulic pad, comprising a fixed and movable plate and a mechanism for moving the latter, with grooves for fastening dies 1 in the movable plate.

A disadvantage of the known device is the presence of a special drive mechanism for moving the movable plate.

The aim of the invention is to simplify the design by using a pneumo-hydraulic press cushion as a drive and improving reliability.

To achieve this goal, the moving plate moving mechanism is made in the form of drive wedges mounted in a fixed plate, spring-loaded sliders with spring-loaded dogs attached to the nickname, electromagnets, and also gear rails fixed on the moving plate, while the drive wedges are connected with a pneumohydraulic cushion

The press supports, on the fixed plate in the front part relative to the direction of extension of the movable plate and on the movable plate in the rear part relative to the direction of its extension, rolling bearings are made.

Figure 1 shows a device for mounting and removing dies, top view; figure 2 - section aa on

10 fkg.1; on fig.Z - section BB in figure 1; figure 4 is a section bb In figure 1; figure 5 - section GG in figure 1.

The device comprises a fixed plate 1, which is attached to

a die plate or a press table, a movable plate 2 mounted for movement on rolling bearings 3 and 4.

20 In the fixed plate 1 are mounted the sliders 5, closed by covers 6 and spring-loaded with springs 7 fixed on fingers 8, dogs 9, spring-loaded with springs 10 sitting

25 on the axis x 11, drive wedges 12, driven by pneumohydraulic press pads. Electromagnets are designed to bring the dogs 9 out of engagement with the teeth of the laths 13.

30 14.

The device works as follows.

If it is necessary to change the punch, the movable plate 2 is disconnected from the fixed plate 1, the electromagnets 14 dogs 9 of the rear movement mechanisms are turned on, and these dogs with the teeth of the rack 13 are disengaged from the gears. The pneumohydraulic pillows turn on and the drive wedges 12 are moved the sliders 5, and since the sliders are in engagement with the teeth of the rails 13 and the slats are fixed on the movable plate 2, the plate moves to the right. By rolling bearings 4, plate 2 is located on bevels 15, and by beveling 16 - on rolling bearings 3 and subsequently moving on rolling bearings 3 and 4, for each stroke of pneumatichydraulic pads one step to the right until it is fully extended from the interstage zone.

The movable plate 2 has cantilever shoulders, which move in the directions to the snapshots of the fixed plate 1, being pressed during movement towards the guides, due to the exit of the movable plate to the rolling bearings 3 and 4,

After the extension of the plate 2 from the zone of the interstitial space, a change of the stamp occurs. Then the electromagnets 14 of the rear movement mechanisms are turned off and the front mechanisms are turned on to pull the front mechanisms pawls out of engagement with the teeth of the rails 13 and again pneumo-hydraulic pillows are turned on which move plate 2 to the left until rolling bearings 3 and 4 come off the bevels 15 and 16. In this position, the movable plate 2 is attached to the fixed plate 1, the press is ready for operation.

The use of the device makes it possible to release the cranes used in these operations, to improve working conditions and safety when changing dies, as well as to increase labor productivity by reducing the die set-up cycle.

Claims (2)

1. A device for mounting and removing dies to a press with a pneumatic-hydraulic cushion containing a fixed and movable plates and a mechanism for moving the latter, and grooves for fixing dies are made in the movable plate, characterized in that, in order to simplify the design, the mechanism for moving the movable plate in the form of drive wedges mounted in a fixed plate, spring-loaded sliders with spring-loaded dogs attached to them, electromagnets, as well as toothed racks mounted on a movable plate, while the drive wedges are connected with a pneumohydraulic press cushion. 2. A device according to claim 1, characterized in that on the fixed plate in the front part relative to the direction of extension of the movable plate and on the mobile plate In the rear part relative to the direction of its extension, rolling bearings are made. Sources of information taken into account in the examination 1. Rovinsky G.N. and Zlotnikov S.L Sheet-stamping mechanical presses .M. , Mechanical Engineering, 1968, P.291293.