DD291944B5 - Adjusting device for width adjustment of the gripper rails of a transfer press - Google Patents

Description

According to the invention, the object is achieved in that each spindle nut is operatively connected to a deflection gear whose output shaft are connected by two connected in a common hinge point toothed belt or chain drives with the frame-fixed adjusting motor, wherein at least between the output shaft and hinge point and between hinge point and the central drive shaft a bridge is arranged. Conveniently, the guide block is made split, and the guide block upper part and guide block lower part is connected to each other by means of a centrally located bolt and an eccentrically arranged non-metallic elastic bolt.

embodiment

The invention will be explained in more detail below using an exemplary embodiment. In the accompanying drawings show

2: Front view of the adjusting device FIG. 3: Detail of the guide block in the side view FIG. 4: Top view from FIG. 3.

The gear boxes (1) are located in the right or left-hand goal area of the side stand of the press. In them, not shown as a lever gear formed drive elements for generating the closing and lifting movement for the guide carriage (2) including guide blocks (3) are mounted. The mounting rail (4), on which the gripper rails are fastened with associated gripper elements for workpiece transport, is displaceably mounted on the guide blocks (3) in the transport direction. For width adjustment of the guide blocks (3) with the support rails (4) the entire transfer is moved to a defined change position, that is, brought into the lowered and opened state. The adjusting drive for the guide blocks (3) is carried out by an adjusting motor (5). A central drive shaft (7) is driven via a deflection gear (6) and the torque is transmitted from here by means of two toothed belt or chain drives (9, 10) connected in a common pivot point (8) via a further deflection gear (11) on which a not shown, is introduced into the guide blocks (3). Between the output shaft (12) of the deflecting gear (11) and hinge point (8) and between the hinge point (8) and the central drive shaft (7) at least one web (13,14) is arranged in each case. When the spindle (15) is stationary, the respective guide block (3) moves in the axial direction according to the direction of rotation of the spindle nut fastened to the deflection gear (11). An adjusting motor (5) downstream multi-disc clutch (16) ensures overload protection, and an angle encoder (17) takes over the accurate measurement of the adjustment. If there are certain causes, such as control errors, failure of a motor or the like to different adjustment speeds between the individual guide blocks (3), then the adjusting device is switched off after exceeding a certain path difference. The associated inclination of the support rails (4) can be coped with by using a split guide bracket (3) without greater burden on the mounting of the support rails (4) in the guide blocks (3). The guide block upper part (18) and the guide block lower part (19) are connected to one another by means of a centrally arranged bolt (20) and an eccentrically arranged non-metallic elastic bolt (21). As a result of the spring action of the elastic bolt (21), the guide block upper part (18) is returned after a rotation in its initial position. By using a sliding washer (22) between the guide block parts (18,19), both parts work on Axial Gleitlagerbasis.

List of used reference numbers

1 gearbox

2 guide carriages

3 leader

4 mounting rail

5 variable motor

6 deflection gear

7 drive shaft

8 pivot point

9 toothed belt or chain drive

10 toothed belt or chain drive

11 deflection gear

12 output shaft

13 footbridge

14 footbridge

15 spindle

16 multi-plate clutch

17 angle encoder

18 guide bolster shell

19 Guide block lower part

20 bolts

21 bolts

22 sliding washer

Claims (3)

1. adjusting device for width adjustment of the gripper rails of a transfer press, with lifting and lowering and transversely to the transport direction by means of lever gears movable carriage, on which support elements are arranged in the upper region of the support rails are mounted with the attached gripper rails slidably in the transport direction, their location the carriage is adjustable by means of spindle adjustment mechanisms, the adjusting spindles are rotatably mounted in the carriage and the spindle nuts are operatively connected to a frame fixedly arranged adjusting motor, characterized in that each spindle nut with a deflection gear (11) is operatively connected, the output shaft (12) by means two toothed belt or chain drives (9, 10) connected in a common articulation point (8) are connected to the adjustment motor (5) fixed to the frame, in each case between output shaft (12) and articulation point (8) and between articulation point (8) and the central drive Swell (7) at least one web (13,14) is arranged. 2. Adjusting device according to claim 1, characterized in that the guide block (3) is designed split and its upper guide member (18) and lower guide member (19) by means of a centrally located bolt (20) and an eccentrically arranged non-metallic elastic bolt (21) connected to each other is. For this 3 pages drawings Field of application of the invention The invention relates to an adjusting device for width adjustment of serving for the transport of sheet metal parts or similar workpieces gripper rails of a press, in particular transfer press, according to the preamble of claim. Characteristic of the known state of the art There are adjusting and locking devices for width adjustment of the support or gripper rails of v. G. Type with movable by means of levers sliding carriage for the realization of the opening and closing stroke known (DD-WP 273 353, DE-OS 3 634 716), in which the support elements of the support rails by means of an engageable spindle adjustment mechanism adjustable in their distance from one another and by means of an im Support element arranged clamping device positively and non-positively lockable on a Hubtraverse, which in turn is raised and lowered stored in the carriage. A disadvantage of these devices is the high material and control effort for the coupling system for coupling the adjustment and the required clamping system. Furthermore, the only stepped width adjustment of the mounting rails provides no optimal adjustments to the technological process. In another known solution (EP 0188648), the support elements for receiving the gripper rails are mounted horizontally displaceable in fixed guides and adjustable by means of spindle adjustment mechanism in their distance from each other, the adjusting spindles hinged with their outstanding ends directly to the pull tabs of the lever mechanism and are positively connected via an intermediate gear stage with a frame fixedly arranged adjustment. This solution requires in addition to increased mass and manufacturing costs for the realization of the closing stroke export lever mechanism increased mass and space requirements for the gear members of the adjustment. Object of the invention The object of the invention is, in an adjusting device for width adjustment of the gripper rails realized by means of a lever mechanism opening and closing movement to reduce the use of materials and the production cost. Explanation of the essence of the invention The invention has for its object to make an adjustment of the aforementioned type so that compared to the first two known solutions omitted the complex coupling and clamping systems for the adjustment and compared to the latter solution by an appropriate combination of the closing stroke export lever mechanism with the Transmission of the adjusting the number of required gear members and the space requirement can be reduced.