SU1648608A1 - Device for feeding sheet to pressing zone - Google Patents

Description

one

(21) 4653574/27

(22) 12.26.88

(46) 05/15/91. Bul NS 18

(71) State research, design and design institute of the coal industry UkrNIIproekt

(72) B. D. Plachtius

(53) 621.979: 62-229.61 (088.8)

(56) USSR author's certificate

No. 136878. class. B 21 D 43/00, B 30 B 15/30, 1986.

(54) DEVICE FOR SUBMISSION OF THE SHEET TO THE PRESS PROCESSING ZONE

(57) The invention relates to cold metal forming and can be used to feed sheet material into a treatment area during stamping. The purpose of the invention is to increase productivity and expand technological capabilities. When the press ram moves, the movement mechanism 7 t does not have a chain fixed on it, which informs the pawns 8 connected to it the reciprocating movement. The dog interacts with the step stops 3. moves the carriage 1 by one step at each stroke of the press ram, while only the lower dog with the lower row of step stops 3 is engaged. When the first row of stamping is completed, the pneumatic cylinder turns on and with them the pawl 8, with the lower pawl disengaged and the upper engaging with the second row of stepping stops. The last workpiece is cut down and during the course of the slide the frame of the carriage 1 moves up to half a step. After the last workpiece has been cut down (when the slide is running down), the press stops again. The pneumatic cylinder 21 is turned on and the cross feed carriage moves with the sheet fixed on it by one cross feed step. 1 z.p, f-ly, 5 ill.

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The invention relates to the cold processing of metals by pressure and can be used to feed sheet material into the treatment area during stamping.

The purpose of the invention is the expansion of technological capabilities, increasing the efficiency of production.

Fig, 1 shows the device, end view; in fig. 2-device, top view; in fig. 3 is a longitudinal feed device, side view; in fig. 4 - the location of the step stops on the longitudinal side of the frame of the longitudinal feed carriage; in fig. 5 - the position of the feed dogs of the mechanism of longitudinal feed at the upper position of the press ram.

The device contains a carriage 1 of longitudinal feed, made in the form of a tubular frame, on the transverse sides of which there is a series of step stops 2, and on the longitudinal sides there are two rows of step stops 3 and 4. The longitudinal sides (tubes) of the frame of the carriage 1 have longitudinal slots 5, in which the walls of the horizontal guides 6, which are fixed on the press table, are located, and whose guide tubes are located inside the longitudinal tubes of the frame of the carriage 1.

The device comprises a mechanism 7 for stepwise movement of a longitudinal feed carriage, which consists of two spring-loaded dogs 8, located on the sliders 9, mounted on two parallel rods 10,

The rods are mounted in brackets 11, which are fastened to the press table. The sliders 9 are connected to a chain 12, the end of which is attached to the press slide. The chain, bending two asterisks 13 and connecting both half-sleeves with the dogs 8, is driving the dogs from the press ram. The dogs are returned to their original position by a spring 14, one end of which is fixed on the slide 9 and the other end on the end of the press table.

On the chain between the bracket 11 and the press slide, a stop 15 is attached, which specifies the stroke of the sliders with dogs. On the bracket 11, a fixed actuator 16 is fastened, for example, a pneumatic cylinder, the rod of which is connected to the rods 10 having levers along the entire guide surface through the levers 17.

The device also includes a cross-feed carriage 18, made in the form of two tubular rods worn on the longitudinal-feed carriage cross-tubes and fitted with clips 19 for fastening the sheet to be stamped, and its feed mechanism 20, including an individual drive

21, for example a pneumatic cylinder with a rod 22, on which a slider 23 with two dogs 24 is located.

The device works as follows.

A source is placed on the cross feed carriage 18 in one of the extreme positions and secured with clips 19. A press is turned on and the first row is stamped. The feed is carried out by the stepping movement mechanism 7 as follows. When the press slide moves, it does not have a chain 12 fixed on it, which informs the pawls 8 connected to it a reciprocating motion. The dog, interacting with the step stops 3, moves the carriage 1 by one step at each stroke of the press ram, while only the lower dog with the lower row of step stops 3 is engaged.

At the completion of punching the first row, before cutting the last billet, the press stops down during the slide, the actuator 16 turns on, which rotates the rods 10, and the pawls 8 with them. The lower pawl is disengaged and the second row of stop pins is engaged. . The last workpiece is cut down and during the course of the slide the frame of the carriage 1 moves up to half a step. Such movement of the carriage 1 is determined by a certain longitudinal positioning of the upper and lower rows of stops relative to each other (Fig. 4 and 5), namely the length of the displacement of the rows

LCM LC 2,

where LC is the distance between the feed dogs (upper and lower) in the extreme upper position of the Press ram;

t - punching step.

After cutting the last billet, the press (when the ram moves down) stops again. The pneumatic cylinder 21 is turned on and the cross feed carriage 18 is moved with a sheet fixed on it one step of the cross feed. The press is turned on and the second row is stamped. When stamping the last blank of the second row, the longitudinal feed carriage moves half a step (due to displacing the last stop by half a step) and thus prepares the initial position of the carriage for stamping the next row. The cycle is repeated.

So get the chess location stamped blanks.

At the completion of the sheet stamping, the half-wolf 23 with the dogs 24 turns and

The device is ready for stamping the next sheet, which will be transversely fed during stamping in the opposite direction.

The proposed device is compact and mounted directly from the press table, allowing stamping of sheets of rather large sizes and of any thickness. Due to the staggered cutting, considerable metal savings are achieved.

Claims (2)

Claim 1. Device for feeding a sheet into the press processing area, comprising two parallel guides mounted on the base, a frame mounted on the guides with the possibility of longitudinal movement, a frame moving mechanism, a carriage mounted on the frame with the possibility of lateral movement, the carriage moving mechanism , gripping elements mounted on the carriage, which is so that, in order to increase productivity and expand capabilities, the transverse movement of the carriage is made in the form of a series of step stops mounted on two parallel sides of the frame, a power cylinder mounted on the carriage, dogs mounted on the rod of the power cylinder and having the ability to interact with the stops, the mechanism frame movements are made in the form of additional stops mounted in two rows on two other parallel sides of the frame, spring loaded dogs, installed with the possibility of interaction with additional stops, with additional stops mounted so that one row is installed with a decrease in the distance between the last stops by half a step. 2. Device pop. 1, characterized in that the frame is made in the form of hollow pipes, wherein the guides are installed inside the longitudinal pipes of the frame, and the carriage is made in the form of tubular rods. installed on the transverse tubes of the frame. To crawl well press in j FIG. five