SU1438900A1 - Arrangement for centering drift-pin on blanks - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used in open firmware billets. The goal is to increase the centering accuracy of the piercing on the workpiece. The device includes a housing, movable side stops, a tong clamp and a sleeve mounted coaxially inside the housing. The drive of the movable side stops is made in the form of a stop ring with driving screws and gear nuts. The nuts are mounted in the housing with the ability to interact with the corresponding driving screws. Tick-borne gripping is made in the form of at least three gripping levers uniformly located around the circumference and, accordingly, traction elements. The latter are hingedly connected to the corresponding locking levers by means of connecting links. At the time of lowering the device with the firmware on the workpiece, the drive screws act on the gear nuts. As a result, the side stops have a device with a pierce over the center of the workpiece. In this case, the gripping levers are opened by lowering the traction elements. Freed from grip, the piercing is in the center of the workpiece. 2 hp f-ly, 3 ill.

Description

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The invention relates to the processing of metals by pressure and can be used with open firmware of blanks.

The purpose of the invention is to improve the accuracy of centering piercing on the workpiece.

Figure 1 shows the device, front view (original position); figure 2 is the same, top view; in FIG. 3, section A-A in FIG. 2.

The device comprises a housing 1, movable side stops consisting of a rattling x rails 2, moving in the plane of the workpiece (on which the device is mounted) and pins 3 mounted on the end of the rack 2 with movement in the plane; perpendicular to the plane of the workpiece, with a drive consisting of a stop ring 4 with rigidly connected perpendicular to its surface with driving screws 5 and gear nuts 6, are installed 1 on the housing 1 with the ability to cooperate with the corresponding driving screws at least three evenly spaced around the circumference of the gripping arms 7 pivotally mounted on a sleeve 8 mounted coaxially inside the housing 3, and the traction elements 9 pivotally connected to the connector gripping arms 10 with each gripping lever being provided with a guide plate 11, fixed to the end of the lever, in addition, the traction elements are provided with fixers of the initial position, which are made in the form of a latch 12, hinged at the traction element 9 located at one end in engagement with the connecting link 10 When the sleeve 8 contacts the stop ring A, a stop 13 is pivotally mounted at the base of the cylinder of the housing 1, one end of which is made fitted, which allows it to return to its original position.

The device works as follows.

The lifting mechanism with the help of the sling, fixed on the traction elements 9 of the tong clamp, lifts them up to the stop. When this occurs, the closing of the gripping levers 7. After that, continue lifting the entire device. At this time, down is going down.

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The stop ring 4 with the driving screws 5 fastened on it, which kinematically act on the gear nuts 6, rotate the gear racks 2 to the maximum length. The device is then carried by a lifting mechanism and lowered over the piercer. In this case, the stop ring 4 is lowered onto the plane on which the piercing is installed so that it is inside the ring. The gear racks 2 are retracted due to the rotation of the gear nuts 6, which are set in motion by the driving screws 5 when lowering the body 1 on the stop ring 4. The propeller, acting on the guide plates 11 forming the inverted funnel, is centered relative to the body 1 and, pushing the gripping arms 7 due to the further lowering of the body 1 onto the retaining ring 4, appears between them. After that, the lift elements 9 are lifted by a lifting mechanism, the movement of which stops when the grip 7 is seized by the grip levers, then the entire device is lifted together with the grip. During the raising of the flashing device, the stop ring 4 is lowered with the driving screws 5 fixed on it, which, kinematically, affect the gear nuts 6, rotate the gear racks 2 to the maximum length.

Then the device with the piercing mechanism is pushed and lowered onto the workpiece. The retaining ring 4 is mounted on the end surface of the workpiece. The housing 1 is lowered onto the stop ring 4 with the driving screws 5 fixed on it, which, kinematically affecting the gear nuts 6 mounted on the housing 1, return the gear racks 2 to the initial position until the fingers 3 are closed on the workpiece. Thus, the stitching is located above the center of the workpiece. When the fingers 3 are closed on the workpiece, the body 1 stops further lowering and then the ijipo continue to lower the thrust elements 9 together with the sleeve 8 and squeeze it in the clamp clamp, touch the base of the sleeve 8 with the stop ring 4. In this case, the grips 7 are opened, locked with latches 12 and the interlocked piercer appears in the center of the workpiece.

The device is then removed from the workpiece, the Dp of this traction elements 9 of the tong clamp is lifted upwardly by a lifting mechanism, and the sleeve 8 is pulled up until its upper end touches the body 1. After that, the sleeve 8 stops its movement and the conveyor lifts upwards elements 9. In this case, the latches 12, hingedly mounted on the traction elements 9, interact with the stops 13, hinged on the housing 1, release the connecting links 10

Inside the housing, characterized in that, in order to improve the accuracy of centering the piercing on the workpiece, the movable side stops are provided with a movement drive in the horizontal plane, made in the form of a stop ring with driving screws and gear nuts, each of which is installed in the housing with the ability to interact the corresponding lead screw, and the tong clamp is made in the form of at least three Nsepe evenly spaced

out of engagement and gripping levers 7, 15 around the circumference of the gripping levers, are shown. After that, the traction elements hinged on the sleeve with 9 are abutted against the housing 1, the whole device is extended upwards from the bottom of its inner surface. At the same time resistant, ring D with driving screws 5 under

as well as traction elements with clamps of the initial position

the effect of its weight remains in place while body 1 rises up. The gear nuts 6, kinematically interacting with the lead screws 1 and 5, begin to push the toothed racks 2, freeing the workpiece. The device is removed from the workpiece and it is again ready to go.

The device provides high precision centering of piercings and improves the quality of the finished blanks.

Claims (3)

1. A device for centering piercings on workpieces, comprising a housing, movable side stops mounted on the housing, a tong clamp and a sleeve mounted coaxially around the circumference of the gripping arms hinged on the sleeve from its inner surface, as well as traction elements with clamps of the initial position and installed in the housing, each of which is pivotally connected to the corresponding gripping lever by means of a connecting link. 2. The device according to Clause I., of which is - the fact that the lock of a similar position is made in the form of a stop hinged in the housing, and a latch hinged on the traction element with the possibility of interaction with one end with the stop and the other with a connecting link. 3. The device according to claim 4, in which the gripping lever is provided with a guide plate, installed so that it can interact with the stitching. Fi8.1 -L g T t Fi & 2 AA