SU424632A1 - PRESS FOR EDITING-FLEXIBLE PRODUCTS - Google Patents

Description

one

The invention relates to press manufacturing, in particular, edits-bending of large-sized parts of simple and complex shape used in aircraft manufacturing, shipbuilding and other industries.

A straightening press is known, comprising upper and stationary lower tables mounted with the possibility of translational movement from the hydraulic cylinder rod, carrying bending elements, and a deflection measuring mechanism that interacts with the press control system. However, such a press does not provide automatic straightening with the elimination of the "spring effect."

The proposed press is characterized in that the bending elements are installed with the possibility of translational movement in the plane of the tables and are made in the form of the sliders embedded in the tables, moved along the guides arranged in the frame and carrying L-shaped spring-loaded arms connected to them and placed under each of them sensors their final position, and the deflection measurement mechanism is made in the form of a disk mounted on the frame with a tongue, on the axis of which there is a deflection indicator and a gear wheel entering into engagement with a toothed rack, kinematically connected through an intermediate electromagnetic clamp with bending levers, while during the rotation of the disk on the press frame, limit switches are mounted, one of which is electrically connected to a time relay located in

control system and specifies the course of movement of the rod of the power cylinder.

Pa figs. 1 shows the proposed press, a general view; in fig. 2 - bend-edit scheme; in fig. 3 is a diagram of the measurement mechanism; and

management presso.m; in fig. 4-8 - positions of bending elements and control mechanisms at various transitions of the press operation.

The proposed straightening press is flexible (see

FIG. 1) consists of a bed 1 on which the lower rotary table 2 and the power cylinder 3 are mounted, to the rod 4 of which the upper rotary table 5 is attached. Mechanism 6 for measuring and controlling the process

The straps are attached to the casing of the cylinder 3, and the press control system is inserted into the frame 1. The bed is a frame closed structure, on the upper and lower cross-bars 7 and 8 of which are guide, spindle screws 9 and 10 and the drive 11 for moving the power cylinder 3 and tables 2 and 5. In the press tables there are built-in sliders 12-15, moving in the guides, and spring-loaded bending elements 16-19 are connected with the sliders of the hinge.

The mechanism 6 consists of a toothed rack 20, gears 21, arrows 22, setting pointer 23, limit switches 24 and 25 (switch 24 for limiting the slide down, switch 25 for turning on time relay 26), gear 27, motor 28 and electromagnetic clamp 29.

The manual control system of the press consists of the following spool 30, controlling the movement of the upward and downward shaft 4, the rack and pinion mechanism 31-34, the stop 35, the shaft and the handle 36 and 37. The semi-automatic control system also has a gear coupling 38, a lever 39, a cylinder 40 and a drive for adjusting the stop 41, operating from two electric motors 42 for rapid movement and two electric motors 43 for slow movement.

A product, for example, a silver panel 44, is mounted on the test bench 45, and deviations from flatness are measured at specified locations. Then, using a roller table 46, the panel is brought under the press, bringing one of the correction points to the transverse axis of the press. With the help of drives 11, 47, 48 and 49, bending elements are installed against the leveling point of the ribbed panel. On the measurement and control mechanism 6, the rotary indicator 23 with limit switches 25 and 24 is electrically set by the electric motor 28 and gear train 27 by the required amount of panel editing in the given place (according to the measurements made).

Including from the control console 50, the working movement of the stem 4 with the top table 5, at the beginning of the bending process, all four bending elements 16-19 are pressed against the supporting surfaces of the creeping 12-15 and contacting the electromagnetic clamp 29, which connects the rail 20 to the press stem 4 after which the stop 51 with the arrow 22 rotates synchronously with the movement of the rod 4. The bending elements deform the finned panel by the value specified by the pointer 23, after which the stop 51 through the limit switch 24 gives the command to reverse the movement of the rod 4 upwards. In the event of a "spring effect of the panel, the bending elements remain pressed against the supporting surfaces of the sliders by the action of the spring forces, so the grid remains closed and the stop 51, the passage through the limit switch 25 limiting the upper tolerance of the product and the time relay 26 enables the drive 52 to move the mechanical stop 41. When the time relay 26 is triggered, the time of which is set depending on the magnitude of the "spring effect", after a predetermined time, the stop 51 gives the command to move the rod 4 down an increased stroke against the stop 41, retracted by the actuator 52 in order to bend - eliminate the “spring effect”. In the case of insufficient bending of the product, the process is automatically repeated. When the straightened position of the panel is within the prescribed limits, the stop 51 does not turn on the limit switch 25, because the bending elements move away from the supporting surfaces under the action of springs, the circuit opens, the jaws 4 and the stop 51 with the arrow 22 return to their original upper position, and the press automatically terminated. Then, tables 2 and 5 with the bending elements 16-19 are set up against the next straightening point according to the described method and the process is repeated.

FIG. 4-8 show the positions of the bending elements and the mechanism for measuring and controlling the process at five different transitions of the press operation.

The stem 4 with the upper table 5 (see Fig. 4) is in the upper position. Panel 44 for roller table 46 is fed to the dressing zone. The bending members 16-19 are spring-loaded and not in contact with the panel 44. The control circuit for measuring the deflection is not closed. Preliminarily, the amount of deflection of the panel is set on the mechanism 6 for measuring the control of the rotary pointer 23 (see FIG. 3).

The roller conveyor 46 (see Fig. 5) lowers the panel 44 on the bending elements 18 and 19 of the lower table 2, and the brush 4 with the upper table 5 and the bending

elements 16 and 17 press the panel 44 in the straightening zone, while the bending elements, overcoming the force of the springs, contact and close the electrical circuit, as a result of which the electromagnetic clamp 29 connects the rail 20 with

table 5; From this moment, the panel begins to be flexed and the stroke 4 of the stroke 4 is registered with an arrow 22.

The rod 4 and the table 5 (see Fig. 6) with the bending elements 16 and 17 are moved down by

set by the pointer 23, the amount of deflection, while the stop 51 (see Fig. 3) closes the circuit through the limit switch 24 and gives the command to reverse the stroke 4 with the table 5.

During the return stroke of the rod 4 and the table 5 (see Fig. 7), if the panel 44 is spring-loaded, the contacts of the bending elements 16-19 remain closed, the clamp 29 connects the rail 20 to the table 5 until one of the contacts opens the circuit and electromagnetic

clamp 29 will separate table 5 with rail 20,

and arrow 22 will stop and show true

deflection of the panel 44.

After finishing bending (see fig. 8) table 5

moves to the upper position, and all mechanisms return to the initial position (see Fig. 4).

Subject invention

The straightening-bending product containing the upper and fixed lower tables installed with the possibility of translational from the ram of the power cylinder, carrying bending elements, as well as the deflection measurement mechanism associated with the press control system, characterized in that - bending and elimination of the spring, bending elements are mounted with the possibility of translational movement in the plane of the tables and made in the form of the sliders embedded in the tables, moved along the the tannin is guided and L-shaped spring-loaded levers, pivotally connected to them, and the deflection measurement mechanism is made in the form of a disk mounted on a frame with a scale, on the axis of which there is a deflection indicator and a gear wheel that engages with a rack, kinematically through an intermediate electromagnetic clamp with bending levers, with limit switches, one of which is electrically connected to the time relay provided for, during the rotation of the disk on the press frame. in the control system and specifying the course of movement of the rod of the power cylinder.

lag

7

Fig 8