DE1112956B - Winding mandrel for a spring winding bench - Google Patents

Description

The invention relates to a known winding mandrel with a releasably connected one at the run-up end Driver part with axial driver slot for the beginning of the spring, the one for a winding bench for springs to be used from a tape .mit a rectangular cross-section, the pitch according to a helical groove of the dome is wound with a base inclined in the manner of a flank of a pointed thread.

According to the invention, the winding mandrel is designed for this special purpose so that the on the mandrel existing spiral groove continues into the driver part, which is connected to one by means of an ejector can be released by the uncoupling rod axially advanced by the hollow mandrel.

This design of the dome and the driver part has the advantage of the winding bench mentioned, that feathers are wound without long superfluous leg ends and with this winding the mandrel from the the most accessible side can be freed from its driver part.

In the drawing, the subject matter of the invention is shown in an exemplary embodiment; namely shows there is a changing bench in view, in which the most important parts are partly shown in section.

Therein with 10 a changing bench stand is designated, on one end 11 of which a pole-changing, continuously variable brake motor 12 is attached. This motor drives one via shafts 13 and 14 Main drive shaft 15, in the conical recess 16, a winding mandrel 19 with his also conical end 17 is fastened by a wedge 18 driven laterally into the shaft 15. From one other shaft recess 20 to its driver part 21 goes in the axial direction through the Winding dome a bore 22 therethrough, which receives a decoupling rod 23 movably. On the other end 24 of the winding mandrel, this driver part is fastened in such a way that one on the driver part located pin 25 fits into a groove in the dome. This runs the helical groove of the dome 19 on the driver part. The driving slot 26 of the driving part is used to Recording of the notched initial cross-section of a pre-deformed ring or several such Flat steel rings. A stub shaft 27 with its handle 28 is present in front of the driver part. This stub shaft is in a two-point or four-point bearing that can be opened and adjusted about the axis 29 30 stored. The bearing is adjustable depending on the size of the winding dome.

Below the cathedral, if possible in its center, d. H. perpendicular under the longitudinal axis of the mandrel is a

Winding mandrel for a spring winding bench

Applicant:

Luhn & Pulvermacher

Limited partnership,

Hagen (Westphalia) - Hasp

Dr. Karl J. Sondermann, Gevelsberg (Westphalia),

and Ludwig Rascopf, Hagen (Westphalia) - Haspe,

have been named as inventors

Spindle 31 attached. This spindle rests in bearings

32, 33 and carries a gear on one end 34 thereof 35, which is in engagement with a gear 36 seated on the end 17 of the dome 19, so that same speed is transmitted from the mandrel to the spindle with exactly the same pitch like that of the winding mandrel is provided. On the spindle, between the two bearings 32,

33, a pressure roller 37 runs with a bushing that also corresponds to the pitch of the winding mandrel 38, the pressure roller having the task of bulging or sagging of the individual windings to prevent when winding the winding mandrel.

The pressure roller is surrounded by two interconnected webs 45, the cross connection 46 of which is guided in a groove 47 of the winding bench. On one of these webs 45 is a downward reaching finger or trigger 48 attached, which is slidable when the winding process is completed against a, d. H. adjustable arranged limit switch 49 pushes and the motor 12 for the continuously variable transmission 50 to Brings to a standstill. When twisting the spring from the winding dome by reversing the direction of rotation the finger 48 pushes against another limit switch 51, so that the twisting process of the spring ends automatically. Both limit switches are on a guide bar 52 in wedge directions depending on Adjustable spring length. The lead 53 for winding the spring and the return 54 for unwinding the Springs are made by a push button circuit.

The winding process and the unwinding of the finished spring goes as follows: First will

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the two limit switches 51, 49 set to the desired spring length. The foldable about the axis 29 Bearing half 30 'with the adjusted three- or four-point bearing 30 is closed, but must first the driver part 21 fits into the winding mandrel 19 through the pin 25 in the groove of the winding mandrel be inserted. The flat steel strip preformed into a ring or several continuous rings is pushed with its notched beginning into the driving slot 26 of the driving part and the pushbutton advance 53 is turned on. The ring is captured by the driver part and is taken along so that the spring steel strip is inserted exactly into the helical groove of the dome. Since the When the pressure roller 37 runs synchronously, the respective winding of the bushing 38 is taken from the outside secured against bulging or sagging. When the spring is completely wound, the finger or the trigger strikes 48 against the limit switch 49, and the changing bench automatically comes to a standstill. so the bearing half 30 'is opened about the axis 29. By driving in an ejector 55, the uncoupling rod 23 pressed against the driver part and the driver part from the dome and at the same time from the notched approach of the first Spring coil pushed. By turning on the limit switch 54 runs as a result of the pole-changing Displacement armature motor 12 of the mandrel 19 in the reverse direction, the spring from the pressure roller and whose heel is loosened like a screw nut. If the finger 48 hits the first limit switch 51, the finished spring is unwound from the dome and the changing bench is automatically at the same time the starting position for winding a new spring is given.

Claims (1)

PATENT CLAIM: Winding mandrel with detachably connected driving part at the run-up end with axial driving slot for the beginning of the spring for a winding bench for springs made of a strip with a rectangular cross-section, which is wound according to the pitch in a helical groove of the dome with a base inclined like a flank of a pointed thread, characterized by a driving part (21 ) with an initial part of the helical groove which can be released by a decoupling rod (23) which is axially advanced through the hollow mandrel (19) by means of an ejector (55). Considered publications:
German patent specifications No. 23 698, 450 071,
495;
U.S. Patent Nos. 1517 004, 1064 975. 1 sheet of drawings