DE6929050U - DEVICE FOR BENDING THE EYES OF COIL SPRINGS - Google Patents

Description

PATENT ADVOCATE, ·. ; *; ; MlS ^ Sb ^ ^. »« I, -. · «·« .-. «. ·. *.,

DiPL.-iNG. CONRAD KQCHLTMG ¹ "" \ Note * i Heetaann & Flnkenslep KG «

Bank account: Commerzbank AG, Hagen
Postal checking account: Dortmund 5989

Telegrams: Patentköchling Hagenwestf ^ .. gftl

Remote call 8 11 64 JrQSXO ¹ Or *

2 July 1969

from the ."

H / D

29 .. & S »:

"Device for bending the eyelets of helical springs ^ '

The invention relates to a device for bending the eyes of Coil spring **, the tangentially braced legs of the

I first bent the helical spring roughly echeparallsl and then molded it onto the

Apart from manual bending tools, motor-driven eyelet bending devices are already known · In both cases, however, the start and end points are bent one after the other. In addition, the corresponding bending tools are required for each minted eyelet shape, such as a handle or hook eyelet ! after drivable bending devices, the expenditure on electronic control devices is considerable *

Task dor invention is thus an apparatus for bending t of the eyelets of coil springs "wherein the tangential abstrebendon leg of the coil spring sunttehst approximately axially bent and then the loops are formed * simplify su" primarily to do with the aim of ways of increasing the power "

According to the invention, the solution to this object is essentially characterized by the fact that the device has two arranged at a distance from one another and adjustable from one another, in each case one device for bending a Feaerochenkels and one

Einriohtiang for forming the eyelets having, motor-driven Bending units exist, between which a narrow, at least one section of the helical part a coil spring releasably grasped holder arranged fixed to the frame is.

In this way, one obtains a device that is more readily available Genus in which the beginning and end eyelets of a helical spring are at the same time; can be molded on

A preferred and inventive embodiment of the vorbeschriebonen Object consists in the fact that the spring, Schenkol - Turning and eyelet shape devices each from a hydraulic one Rotary piston with axially parallel to the rotary piston housing axis exist near the lehäusemantels striving output shaft, and the latter each have a tool head with one each have an approximately axially strutting mandrel and a finger stripping parallel to the axis as bending tools, and also the latter are each directed in pairs to one another, and the rotary pistons are preferably rotatable and axially adjustable are supported, and preferably also the rotary piston holder are arranged in pairs at the free end of a rod supported on a tailstock, furthermore the rods in the Tailstocks are arranged to be rotatable and lockable, and the tailstocks and / or those carrying the rotary pistons to one another coaxially arranged rods axially adjustable and lockable are"

By means of this measure, with the device according to the invention regardless of the number of turns of the helical

29

Helical spring part eyelets are bent, whereby the .Anfangsund bathing eyelets can take any position to each other.

In addition, an advantageous and inventive further development of the above-described subject is characterized by « that the floating piston mounts «preferably in the form of clamps that can be pushed together by means of screws, compared to the

! Tailstock rods around transverse to the rod's longitudinal axes

Axes are pivotable and lockable ! Furthermore, an advantageous and inventive feature is characterized

Embodiment of the above article by "that means are provided for selectively changing the pivoting angle of the rotary output shafts _$ preferably such that each rotary piston is arranged upstream of the print medium feed controlling Zeitschaltsr _s whose Schaltseitea are optionally changed, and preferably also the pre-selected switching time of the timer indicating Facilities are arranged «

This allows more or less closed eyelets to be formed without the need for special bending tools ο

It has also proven to be particularly advantageous if in the above-described subject to shorten the non-productive times on at least one section of the helical part a coil spring releasably clampable, frame-fixed bracket an on-switch for the rotary piston control that can be influenced by the latter in the closed position is arranged

Further, a preferred variant of the above may article featuring ₉ characterized in that pneumatically © Drohkolben are arranged.

An embodiment of the invention is shown in the drawing and is described in more detail below. It beige

Fig. 1 an eyelet bending device in the front view,

FIGS. 2 to 5 show four different from one another Positions of the bending tools 5

Flg. 6 to 9 an Auewahl with the invention

Device manufacturable coil springs *

In this case provided on a frame 1, two with spaced tailstocks 2, in which a cylindrical rod is arranged in each case 3 rotatably and axially adjustable "and lockable, which run to one another coaxially * The rods 3 carry at their mutually facing end parts of two gorge pliers 4 -, in each of which a hydraulic rotary piston 5 »6.7» 3 are arranged to be rotatable and axially adjustable and lockable. In addition, the clamping claws 4- can also be adjusted independently of one another in the longitudinal extension of the rods 3. The rotary pistons have output shafts 9 which are axially parallel to their axially extending piston shafts (not shown) and which carry exchangeably fastened bending tool heads 10. Adjusting devices 11 are also provided in order to be able to bring the rotary pistons 5 _¥ 6,7 »8 also from the normal, right-angled position to the rods 3, for example into a position such as the left, lower Kleram forceps Λ is shown * In the middle between the side sticks 2, the frame 1 © in © bracket 12 extends, between which a hand lever ©! 13th

«BOT»

s5Usaram © ndrSngbarea Baeken 14 a coil spring 15 held are kaiin on the bracket is another hydraulic, on the control of the rotary piston effective pulse generator 16 attached »The In the closed position of the jaws 14 from the hand lever 13 switched on wi: edo

If the pulse generator 16 has been influenced by the hand lever 13, will first of all, the rotary lobes 5 + 7 are acted upon hydraulically. As a result, their tool heads 10 can be seen in FIG. 2 Position rotated into the position shown in FIG (Flg. 2) with an axially parallel brace from the bending tool head 10 Fingers 18 bent around © into abutment 19 fixed to the frame, approximately axially parallel (FIG. 3) »with the angle of rotation of the rotary pistons can be controlled by time switches, not shown, which can be changed optionally in their switching tents. Hach this operation the Padersehenkel 17 each protrude axially between one bracing mandrel 20 and an axially parallel bracing finger 18 carried by the output shafts of the rotary pistons 6 + 8 Sheet metal tool heads 10, which are influenced by a sequence control, the spring legs 17 from the position shown in FIG. 4 by rotating the tool head by approx. 160 ° to a position shown in FIG. 5 deform the eyelet 21 shown · Here too, the angle of rotation of the Thrusters 6 + 8 controlled by a timer, not shown. The preselected switching times of the tent switches can be seen on display devices 22. The latter can also have a scale on which the preselected angle of rotation can be read · After the eyelets 21 have been molded on, the rotary piston drive shafts are influenced by a sequence control

automatically rotated to the starting position. The transmission of the torque from the axially extending rotary piston shafts to the axially parallel to the housing axis of the Rotary piston 5 »6,7t8 vertaufenden, the tool heads 10 bearing The drive shafts are via non-calibrated ones mounted on the rotary lobes Gear drives, so that at the same time the speed of the output shafts carrying the bending tools 10 compared to the Rotary piston shafts not shown is reduced. It is also possible to automatically remove the coil springs 15 from a magazine the holder 12, 13 »14 · to be supplied, releasably tensioned and after to be transported away from the eyelets 21

All new individual and combination features disclosed in the description and / or drawing are regarded as essential to the invention *

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Claims (1)

· » " 7 mt Protection claims 1 · Device for bending the eyes of coil springs, whereby the tangential abstrebonden legs of the helical spring initially bent roughly parallel to the axis and then the eyelets be molded, characterized in that the device adjustable from two spaced apart and to each other arranged »one setup run each for turning one Spring leg (17) «ad a device for forming the Bending units that have eyelets (21) and can be driven by a motor exists, between which a narrow, at least one section of the helical part of a helical spring (15) releasably utafassbaren holder (12,13,14-) is fixed to the frame. 2 · Device according to claim 1, characterized in that the spring-leg ©! - bending and the öser »forming devices each consist of a hydraulic rotary piston (5,6,7 * 8) with an axially parallel to the rotary piston housing axis near the housing shell atostreb & ndezs output shaft, and the latter each have a tool head (10), each with an approximately axially braced mandrel (20 "bzvi, 19) and a finger (18) which braces aehspspälleX as bending tools, and the latter are also mutually aligned in pairs. 3, device according to one or more of the preceding claims, characterized in that the rotary pistons (5 »S, 7» 8) rotatable and axially adjustable RB Ί. ff9 i -δι ·. Device according to eiuera or melarereo. of the preceding claims, characterized in that the Drehkolbanhalteruag are arranged in pairs at the free end of a rod (3) held on a tailstock (2), furthermore the rods (3) are arranged in the tailstocks (2) so that they can be rotated and locked, and the tailstocks (2) and / or the rods (3) that carry the rotating cages and are arranged coaxially to one another are axially adjustable and lockable 5. Device according to one or more of the preceding claims, characterized in that the rotary piston holders, preferably in the form of clamps (4) that can be pushed together by means of screws, opposite the tailstock bars (3) are arranged to be pivotable and lockable about axes running transversely to the longitudinal axes of the rod 6. Device according to one or more of the preceding claims, characterized by facilities for Wahlwaisöu Change of the swivel angle of the rotary piston output shafts. 7. Device according to one or more of the preceding claims, dadur '\, that each rotary piston (5 »6» 7,8) a time switch controlling the pressure medium feed is upstream, the switching times of which can optionally be changed. 8. The device according to one or more of the preceding claims _9, characterized in that the preselected Sehalfc «time of the time switch indicating devices (22) are arranged. > fl ■■ «' 9c device according to one or more of the preceding claims _β characterized in that at the aum least a portion of the wendeIförmigea part can be clamped a helical spring (15) releasably fixed to the frame support (129 "135,14O an influenceable by the latter in the closed position power switch (16) is arranged for the rotary piston control. 1O _e device according to one or more of the preceding claims, characterized in that pneumatic rotary pistons (5 * 6,798) are arranged Ki Patenianw "