DD262384A1 - AIDING DEVICE FOR THE DIVERSION OF DIFFERENT LONG, STRAIGHT STRAIGHTS - Google Patents

Abstract

The auxiliary device for Ausmitten of different length, straight bars (including tubes, profile material, Drahtstuecke) positioned this always, even with production-related length tolerances up to 5% and more to the center of other processing stations in a machine complex. Centrality and further processing from the center (eg bending) to the bar ends are a prerequisite, despite different initial lengths, to obtain evenly long bar ends (especially in tubular heaters for electrical appliances). The Ausmitten the Staebe done by lateral displacement of Staebe to the central position by hydraulic or pneumatic cylinder, which is arranged between two carriages and works on a push and slide drive. Follow-up procedures are initiated in conjunction with an electrical limit switch. Fig. 1

Description

Opening the auxiliary device, the working cylinder presses the carriages on one another and at the same time tensions a tension spring with which both carriages are connected. The approach of the carriage and thus the displacement stops is caused by the tension spring to the extent of the speed, as the return of the piston in the working cylinder happens. If both displacement stops on the rod ends resistance, stop the carriage and the displacement stops attached thereto movement, the piston return stroke is further continued. This is made possible by the working cylinder is fixedly mounted on a carriage, while the piston rod head on the other carriage in the working direction a piece is guided freely movable in a slot of a bearing block. The further retraction of the piston rod head in the bearing block is used so that an electrical switching contact, which was previously always in the depressed state by the piston rod head is now released, thus the end position of the rod is signaled and further movements of the processing system can be triggered. This system of engagement has the advantage that it is quickly adjustable for different rod types and rod lengths and that the relatively large (technological) manufacturing tolerances are taken into account within a type. Due to the force attack in the axis of action eliminates all wear-promoting side forces. The guide legs of the push gear serve only the uniform reciprocation of the carriage and have no power to transmit. At the bar ends (eg tubular heating elements with ceramic end beads), only the low spring force is effective and the fragility of the ceramics used is very accommodating.

embodiment

Reference to an embodiment of the invention will be explained in more detail

 It means:

Figure 1: the front view of the auxiliary device Figure 2: top view of the auxiliary device

On a left and right carriage 3, one, the object to be centered object 5 receiving displacement stop 4 is fixedly connected to the carriage 3. Under the displacement stops 4 and carriage 3, a working cylinder 1 is arranged, one side of which is fixedly secured to a carriage, but the piston rod head 9 is guided in the direction of movement in a groove in the bearing block 8. When opening the device, the piston rod head 9 presses against the front end position 11 in the groove of the bearing block 8. The carriage 3 with the displacement stops 4 strive apart. The tension spring 2 is tensioned. The contact of an electrical limit switch 10 is pressed by the piston rod head 9. If the return stroke is initiated in the working cylinder 1, the carriages 3 move uniformly with the assistance of the guide legs 6 and the guide 7 towards each other to the extent that the working cylinder 1 permits. However, the movement itself is caused by the tension spring 2. Thus, the piston rod head 9 remains in the front end position 11 until both displacement stops 4 abut both ends of the rod. Thus, the carriage 3 are braked. However, the piston rod of the working cylinder 1 continues. Now the piston rod head 9 moves in the groove of the bearing block 8 to the rear end position 12 and moves away from the electrical limit switch 10th

The stroke of the piston rod ends before the rear end position 12 so that acts as a displacement or clamping force only the force of the tension spring on the rod ends, which was intended.

Claims (3)

Claim :. 1. Auxiliary device for Ausmitten of different length, straight bars using elements of a thrust and a sliding drive with two the continuity of the movement of two carriages, same length guide legs, characterized in that opening and closing movements of both carriages (3) of a hydraulic or pneumatic Working cylinder (1) and piston are driven, that each carriage (3) is associated with a displacement stop (4) and both carriages (3) with a tension spring (2) are connected. 2. Auxiliary device according to claim 1, characterized in that the piston rod head (9) of a hydraulic or pneumatic working cylinder (1) in the effective direction of its stroke loosely in a groove of the bearing block (8) of a carriage (3) superimposed, while the working cylinder ( Dam other carriage (3) is firmly attached. 3. auxiliary device according to claims 1 u. 2, characterized in that the piston rod head (9) with the force of the tension spring (2) against an electrical limit switch (10) is applied when opening and closing the auxiliary device and that upon release of the pressure on the limit switch (10) electrical signals are triggered. For this 2 pages drawings Field of application of the invention The invention finds application in machine and rationalization tooling, where straight rods or tubes of relatively different length must be averaged over a chucking or machining station (eg, bending), e.g. B. tubular heaters, rods, wires, round or profile material. Characteristic of the known technical solutions The alignment of bars of their length in the horizontal plane to a certain point for the purpose of clamping, holding or the like for further mechanized processing dedicated to a few writings. In principle, the "scissors principle" for eccentric, but also for the transmission of forces over and over again is based on the application of a scissors grid for simultaneous and uniform, two-sided bending of rod-shaped material These and other similar devices, however, have the disadvantage of not correcting the eccentricity without bending the thinnest bars nor of having greater manufacturing tolerances in the prior art Length of the bars so that ultimately two equal length bar ends after the last bend arise.Furthermore, the known solutions to own, that the active force of the ends of a pair of pliers always acts on a circular arc on the object. Object of the invention The object of the invention is a simple auxiliary device for positional positioning of a rod with production-related length tolerances ± 5% in front of further operations dependent on the central position of the rod (eg bending), such that, irrespective of the size of the length tolerance of the rod, At the end of a bending process two equal length bar ends are available. The Ausmitte elements of the device may, in view of the relatively large length tolerances, not circular arc on the rod ends come. Explanation of the essence of the invention The object of the invention is to bring the length center of coming from a magazine, isolated rods with relatively large differences in length (up to ± 5% of the total length) with the center of another processing station (eg bending) in accordance with minimum space requirements, lowest Ausrichtkräfte , high accuracy, lowest possible wear of components that affect the alignment quality, high reliability and high working speed are other conditions. The realization of this task is an important prerequisite for the further bending work on the bars, which, starting from the center of the bar, is to be conducted simultaneously to both bar ends and, regardless of the total length of the bar, must result in equal bar ends. According to the invention the object is achieved in that the previously magazinierte and now isolated rod of a left and right displacement stop, coupled with two equally long guide legs of a thrust mechanism, as long as its longitudinal axis is moved until the middle of its longitudinal dimension with the center of the entire machine complex belonging another processing station (eg bending device) matches. The displacement stops are on carriages, which are moved by means of a hydraulic or pneumatic working cylinder in its longitudinal axis. At the