EP0798058B1 - Wire forming apparatus, in particular a universal spring coiling machine with cutting device - Google Patents

Description

The invention relates to a wire forming device according to the generic preamble of claim 1 (see e.g. DE-A-4138896).

The invention relates specifically to the cut for separating the coiled spring from the endless wire in spring coiling machines, in particular spring coiling machines of a larger type with a working range of up to 20 mm wire diameter, for example for the production of cold-formed vehicle suspension springs.
Spring coiling machines with a straight cut have been known for a long time (see eg CH-Z. Technica, 1968, No. 10, pp. 839-841, especially Fig. 2), in which the springs can be moved up and down in a straight line in a rigidly arranged slide guide be cut off against a stationary cutting mandrel. So far, this is the most used cutting device in spring coiling machines.

In a known spring winding machine of a larger type ("FUL 10"), the drive for this takes place Knife movement from the feed motor. To do this, the wire feed (feed rollers) is reached when it is reached the spring length and number of turns stopped by means of a coupling and at the same time on the drive the cutting shaft switched. The cutting shaft performs for each cutting movement one rotation. This becomes from the cutting eccentric seated on the cutting shaft Movement via several levers, transmission and connecting links to the outside on the front of the machine Cutting knife slidably guided in a rigidly arranged slide guide transfer. This type of movement and power transmission stores a lot of elastic Energy. With the very high cutting forces, this is suddenly released after the cut and leads to big vibrations. But these vibrations cause because of the many bearing and articulation points, which in total have a large stock clearance, a lot of noise when reversing the clearance. The operator of the machine and the professional associations no longer make a lot of noise accepted. Even cut shock absorption provided in newer machines does not work noticeable improvements. Furthermore, the strong vibrations destroy modern construction and Controls of the machine.

The stroke of the knife movement described above must be such that the Cutting edge of the knife in the manufacture of form springs, e.g. tapered feathers, one way passes through, which is at least the maximum possible diameter difference between the largest and the smallest spring outer diameter of the spring corresponds to the winding process of the spring not to be in the way.

This great path that the cutting knife has to go through requires a not inconsiderable one Period of time. However, as mentioned above, the wire feed of the machine is stopped during the cut quiet. The production of a new spring can therefore only start when the cutting knife has returned to its starting position, that is, to its upper position.

The invention is therefore based on the object of providing a generic spring winding machine, which is drastically reduced in noise (environmental protection), which is low in vibrations (longer service life the machine and its tools), which works more efficiently (larger number of finished springs per unit of time) and which can be quickly converted from right-handed to left-handed.

This object is in a spring coiling machine mentioned in the preamble of claim 1 Art solved according to the invention by the characterizing features of claim 1. Beneficial Refinements and developments are characterized in the subclaims.

Characterized in that the cutting force in the spring winding machine according to the invention advantageously in the rear extension of the cutting knife without, or reduced to a minimum, game-causing Transmission links are introduced directly to the cutting device, the noise reduced to a minimum and the harmful vibrations avoided. This is done using an electro-hydraulic NC drive in the form of one in the line of force of the cutting knife extended, fast-working hydraulic cylinder with associated control block. This self-contained hydraulic drive forms a hydromechanical bearing control circuit and can be operated extremely dynamically, it essentially consists of the following components: hydraulic cylinders, Control valve, setpoint specification, feedback, setpoint motor and stroke position adjustment. Such drives are already used in punching and nipple machines (see DE-Z. O + P Oil Hydraulics and Pneumatics "36 (1992) No. 10.

The fact that the cutting knife is attached directly in the lower piston rod end of the cylinder and interacts with the cutting mandrel arranged in the mandrel carrier as a counter knife and that the cylinder in turn is firmly connected to the mandrel carrier, these parts form a compact Cutting unit with closed power flow (cylinder cutting knife cutting mandrel - mandrel carrier cylinder). All bearings of the cutting device of the spring coiling machine, always a certain bearing play are outside of this flow of force, which is just straight about Tension and pressure elements are placed.

The electro-hydraulic drive itself is extremely quiet. During the entire working stroke are not uncontrolled pressure profiles in the hydraulic system, even the actual "blow" during the cutting process - triggered by the tearing of the spring steel wire material - affects reduced form.

In addition to reducing the cut noise, according to the invention, bypassing the at State of the art required large knife path for cutting off a finished winding Form spring to increase the performance of the spring coiling machine this entire compact cutting unit, consisting of cylinder with control block and cutting knife as well as the mandrel carrier with the cutting mandrel after a cut has been made about a pivot axis provided on the cutting cylinder program controlled swung out of the working level. This is a major advantage the design according to the invention that the center of gravity far above the cutting knife is, the heavy part of the compact cutting unit is close to the pivot point and thus hardly needs to be moved. The lower part to be swung away has relatively little mass.

The cutting knife only needs to go through a cutting path that approximates that corresponds to the cutting wire diameter, which may still have to be adapted to the wire strength can. The computer of the machine control determines the optimal cutting stroke, which is sent to the electro-hydraulic NC drive of the cutting cylinder is transmitted.

The program-controlled swiveling of the cutting unit for the cut can already take place during the Winding the final turn of the form spring and swinging out after the cut, during the Knife return strokes are started. The work sequence for form springs is therefore: pulling in (Winches) - swung in over time - cut - swing out during the knife -Returns. In the manufacture of cylindrical springs, the cutting unit does not have to be pivoted away all. It can be cut immediately after the winding process. Another advantage of the electro-hydraulic NC drive of the cutting unit is that the cylinder piston always floating between the two oil surfaces on the piston and piston rod side, so that he is neither at top dead center nor at bottom dead center on a mechanical stop moves. This brings excellent hydraulic shock absorption, which results in a significant Noise reduction leads.

It is also advantageous that the stroke position of the working piston of the cylinder can be changed independently of the working stroke. The starting position of the working piston within the total cylinder stroke at which the working stroke is to begin can thus be freely selected in a CNC-controlled manner. This property of the spring coiling machine according to the invention means that cutting knives of different lengths of the cutting unit, for example re-sharpened knives, can be used, and that the starting position of the pitch tool of a pitch device, for example after changing from one wind direction to the other wind direction, with respect to the drawn-in wire without mechanical Adjustment means can be set in a reproducible manner under CNC control, as is described in more detail below.
Not only the mentioned free programmability of this NC drive of the cutting cylinder of stroke position and working stroke, but also that of speed, acceleration, dwell time and power bring enormous advantages.

Fig. 1

die Ausführungsform in Vorderansicht in teilweise abgebrochener Darstellung,

Fig. 2

eine Seitenansicht von rechts der Ausführungsform mit einem Teil-Längsschnitt nach der Linie II-II in Fig. 1,

Fig. 3

eine teilweise Draufsicht in Richtung III in Fig. 1 mit der Schwenkeinrichtung der Ausführungsform in teilweise geschnittener Darstellung,

Fig. 4

einen Längsschnitt nach der Linie IV-IV durch die Hinterwand der Ausführungsform mit Sicht auf einen Teil der Schwenkeinrichtung,

Fig. 5

eine Ansicht in Richtung V in Fig. 1 auf die rechte Vorderwand mit dem oberen Führungsschlitten der Ausführungsform in teilweise geschnittener Darstellung,

Fig. 6

einen Ausschnitt in Draufsicht in Richtung VI in Fig. 1 mit der Schneideinrichtung der Ausführungsform und

Fig. 7

einen vergrößerten Ausschnitt in Richtung VII von Fig. 1 mit der Höhenverstellung der Schneideinrichtung, teilweise geschnitten dargestellt.

The invention is explained in detail below with reference to the preferred embodiment of the machine according to the invention which is shown by way of example (and in part schematically) in the drawing. It shows

Fig. 1

the embodiment in front view in a partially broken representation,

Fig. 2

a side view from the right of the embodiment with a partial longitudinal section along the line II-II in Fig. 1,

Fig. 3

1 with the pivoting device of the embodiment in a partially sectioned illustration,

Fig. 4

2 shows a longitudinal section along the line IV-IV through the rear wall of the embodiment with a view of part of the swivel device,

Fig. 5

2 shows a view in the direction V in FIG. 1 of the right front wall with the upper guide carriage of the embodiment in a partially sectioned illustration,

Fig. 6

a detail in plan view in the direction VI in Fig. 1 with the cutting device of the embodiment and

Fig. 7

an enlarged section in the direction VII of Fig. 1 with the height adjustment of the cutting device, shown partially in section.

The spring winding machine shown in its entirety in FIGS. 1 and 2 mainly exists from a wire feed 10, a wind station 12 with a gradient device 14 and a cutting device 16. The wire feed 10 is e.g. by four pairs of a total of eight wire feed rollers 18 formed that an endless wire 20 in a straight line horizontally through a wire guide 22 in advance the wind station 12. Arranged on a left front wall 26 of the machine frame 28 Wire feed rollers 18 are operated by a not shown CNC controllable servo motor driven.

In the wind station 12 there are two pin-shaped winding tools 32 and 34 permanently deforming the wire 20 running straight on them, a pitch tool 36 and a cutting tool 38. All tools are adjustable, exchangeable and movable.
The wire 20 is turned by the two winch tools 32 and 34, which are fastened in two winch devices 44 and 46 arranged one above the other on a right front wall 42 of the machine frame 28, depending on the position of the two winch tools 32 and 34, to the right or left hand (positive or negative helicity) coil springs shaped, ie depending on whether the wire 20 is deflected upward or downward with respect to the wire guide axis 48. The construction and the mode of operation of the two winch apparatuses 44 and 46 correspond to those of the winch apparatuses 30 and 32 described in DE 92 13 164 U1 of the spring coiling machine disclosed therein. The few manipulations described there are also necessary here to convert the two winches 44 and 46 from one wind direction to the other wind direction. For the form drive of the upper winch apparatus 44 for generating the form of form springs sits on the front of the right front wall 42 of the machine on a shaft 52, which is driven by a second CNC-controllable servo motor 54, a disk-shaped control curve 56 designed as a bead curve, which for Implementation of the rotational movement of the shaft 52 via rollers 58 and a lever 60 in a known manner in a translational movement of the wind tool 32 corresponding to the angle of rotation. The coordinated movement of the winch tool 34 of the lower winch apparatus 46 is controlled by a second disk-shaped control curve 64 designed as a bead curve via rollers 66 and a lever 68 as well as an articulated rod 69, which sits below the shaft 52 on another shaft 70 and via a toothed belt gear 72 from the same servo motor 54 is driven.

In a variant of the embodiment, each of the two control shafts 52 and 70 has its own CNC-controllable servo motor 54 or 74 program-controlled intermittently rotating forwards and backwards driven.

This enables that in the case of form springs which are difficult to manufacture, e.g. with large differences in diameter, e.g. merge within a spring turn (e.g. in the case of twists), the two winch tools 32 and 34 can be moved separately under program control, can be adapted to special needs.

When producing right-handed springs, the cutting device 16 is with a cutting cylinder 80 arranged on an upper, activated swivel device 82, while the incline device 14 arranged with a pitch cylinder 86 on a lower passivated pivoting device 88 is. Both cylinders 80 and 86 are hydraulic cylinder-piston units and each with a program-controlled NC valve 78 and 84.

For driving the actively acting swivel device 82 is on a rear wall 92 of the machine frame 28, which is provided with a recess, a bracket 94 attached to which an angular planetary gear 96 is screwed, which is driven by a CNC-controllable servo motor 98 becomes. A driver flange is arranged on an output shaft journal 100 of the gear 96 in a rotationally fixed manner 102. This is guided by ball bearings in a ring 104 fastened to the console 94. On the distal end of the driving flange 102 is then a spacer ring 108 a toothed disc 110 is arranged, which together with a disc-shaped as a bead curve Control cam 112 is screwed non-rotatably to the driver flange 102.

The torque is introduced by the control cam 112 via two rollers 114, which on free end of an arm 116 pivotable on a bolt 118 fastened in the bracket 94 mounted, two-armed, upper pivot lever 120 are arranged. At the forked end of the other lever arm 122 of the lever 120 designed as an angle lever engages on a bolt 124 a connecting rod 126 which connects the pivot lever 120 with an upper fork flange 130 connects via a bolt 132. The connecting rod 126 consists of two joint heads 134 and 136, which are connected by a turnbuckle 138.

The toothed pulley 110 is via a toothed belt with another, on the drive shaft journal a not shown, but known position encoder connected non-rotatably seated pulley. The encoder driven in this way is used for absolute position monitoring of the swivel device 82. An upper mandrel carrier 144 is fastened to the fork flange 130, which laterally between the lateral End face of the right front wall 42 and the lateral end face of the left front wall 26 of the Machine frame 28 is slidably guided. In a rectangular opening 148 of the upper mandrel carrier 144 is a cutting mandrel 150 by means of a known mandrel clamping device, which is not shown in detail but is known 152, which also sits in the breakthrough clamped.

The movable cutting tool 38 of the cutting device 16 interacts with the during Cutting process fixed cutting mandrel 150 together as a counter knife. The mandrel 150 can if required for certain types of springs, while not cutting and after the adhesion the mandrel chuck 152 has been released by means of a not shown but also known Device to be withdrawn from the wind area.

The housing is at the end of the upper mandrel carrier 144 opposite the fork flange 130 81 of the hydraulically operating cutting cylinder 80 of the cutting device 16 is screwed on. At the end of the cutting cylinder 80 facing the cutting mandrel 150 is in the Piston rod 154 in a receiving bore 156 a cutting tool holder 158 used and attached to the piston rod in which the cutting tool 38 is held clamped is. In one, the upper end of the right machine front wall 42 with the upper end of the The rear wall 92 of the cross member 162 connecting the machine frame 28 is the upper end of a rear bottom guide rod 164 supported while the lower end of the guide rod 164 held firmly clamped in a bearing 166 below the cross member 162 on the right front wall 42 is. An upper guide carriage 170 is slidably mounted on the guide rod 164. An arm 172 of the guide carriage 170 is additionally laterally between the lateral end face the right front wall 42 and the side end face of the left front wall 26 of the machine frame 28 slidably, and protrudes forward between these two walls from the spring coiling machine out. Arm 172 is bifurcated at its front end and intervenes the fork in two bores, two laterally turned on the cylinder housing Pin 176 of the cutting cylinder 80 of the cutting device 16. These two pins 176 form a pivot axis 178 for that introduced by the control cam 112 onto the pivot lever 120 Torque, which via the connecting rod 126 and the fork flange 130 to the upper mandrel carrier 144 to which the cutting cylinder 80 is attached is transmitted, whereby the entire Cutting device 16, consisting of cutting cylinder 80 with cutting tool 38 and upper Mandrel carrier 144 with cutting mandrel 150, together with screwed-on fork flange 130 around it Pivot axis 178 from the cutting plane approximately parallel with respect to the machine front walls of the cutting device 16 into a view into the plane of the drawing of FIG. 1 directed, inclined plane is pivoted away. The cutting tool 38 is thus pivoted away from the winch level and releases them. For swinging out after a wire cut on a coiled spring and swiveling in after Winding a new form spring turns control cam 112, time-controlled by CNC, from oscillating Servomotor 98 from a reciprocating limited rotary movement. The measure can the rotary movement, i.e. the size of the swivel angle, can also be CNC-controlled.

The entire cutting device 16 with the upper mandrel carrier 144 can be CNC-controlled by a motor are adjusted in height, whereby the position of the cutting mandrel 150 to the spring diameter to be wound and can be adapted to the wind direction.

For this purpose, a bearing 182 is fastened to the cross member 162 at the upper end of the machine frame 28, on which a worm gear 184 is flanged by means of an intermediate flange 186. The Worm gear 184 is controlled by an adjustable servo motor flanged to gear 184 188 CNC controlled. On the output side, a downwardly projecting one is fixed in the gearbox 184 Spindle 190 inserted into the bearing 182 by means of an axial deep groove ball bearing 192 for receiving the axial forces acting on the spindle 190 is rotatably mounted. The spindle 190 is by means of an adjusting nut 194 axially adjustable fixed in the bearing 182. Below the intermediate flange 186 a toothed disk 196 is arranged on the spindle 190 in a rotationally fixed manner. The toothed washer 196 is over a toothed belt with another, on the drive shaft journal of a not shown, but known Position encoder connected non-rotatable toothed pulley. The so driven encoder is provided for position monitoring and / or position display.

The spindle 190 is provided with an external thread 200 approximately on its lower half a threaded flange 202 is screwed. The flange 204 of the threaded bush 202 is attached to the upper guide carriage 170 by means of screws. By CNC-controlled turning of the Spindle 190 by means of the servo motor 188 can the upper guide carriage 170 and with it the entire Cutting device 16 can be adjusted up and down in its height.

In the axial extension of the guide rod 164 is a second guide rod (conceivable with it) 208 provided, the upper end of which is fixed in a bearing 210, the one on the right Front wall 42 of the machine frame 28 is attached, while the lower end of the rod 208 in Bottom of the right front wall 42 is mounted. On the lower guide bar 208 is a lower one Guide carriage 216 slidably mounted. Here, too, is an arm 218 of the guide carriage 216 additionally between the left front wall 26 and the right front wall 42 on the side thereof Sliding end faces. The arm 218 of the guide carriage 216 is at its front end forked and takes two on the cylinder housing between the fork in two-part bearing holes laterally pivoted pins 222 of the pitch cylinder 86 of the pitch device 14 on. The housing 87 of the pitch cylinder 86 is connected to a lower mandrel carrier 226 Screws firmly connected to the side between the side face of the right front wall 42 and the lateral end face of the left front wall 26 is kept guided; he shows one Opening 148 of the upper mandrel support 144 corresponding rectangular opening 224, in the cutting mandrel 150 with the mandrel clamping device when the two tools 36 and 38 change location 152 is used after they have been removed from the top opening 148.

On the side of the cutting cylinder 150 facing the hydraulic working gradient cylinder 86 is in its piston rod 228 in a receiving bore 230 and on the piston rod attached an incline tool holder 232, in which the incline tool 36 is clamped is held. At the end of the lower mandrel carrier facing away from the pitch cylinder 86 226 is a fork flange 236 corresponding to the fork flange 130 of the cutting device 16 screwed on. The guide carriage 170 and 216 have a bore for receiving a fixing bolt 240 and the fork flanges 130 and 236 with a corresponding to the bolt thread Provided with internal thread. In the incline 14, the lower guide carriage 216 and the lower fork flange 236 is firmly screwed together by means of the fixing bolt 240, see FIG. 2. Those from the pitch cylinder 86 together with the pitch tool 36, the lower mandrel carrier 226 and the fork flange 236 existing unit is thereby fixed immovably, whereby an unwanted pivoting away of the unit about the axis 244 of the pin 222 of the pitch cylinder 86 is prevented. The pivot axis 244 is thus inactive. A connection from the fork flange 236 to the control curve 112 of the lower pivot axis 88 is therefore in right-hand winds unavailable. It should also be mentioned that the lower guide carriage 216 by means of a connecting rod 248 is connected to the upper guide carriage 170, so that the lower Guide carriage 216 with the incline 14, the previously described CNC-controlled Height adjustment of the cutting device 16 participates. This allows a second controlled positioning axis can be saved for the lower guide carriage 216.

Since the incline 14, as I said, the height adjustment of the coupling Cutting device 16 participates, the position of the incline tool 36 must be adjusted the cutting device 16 to a different spring diameter or when changing right-hand winds be adjusted on left winds in relation to the drawn wire. But this is - as mentioned at the beginning - unproblematic, since this is the electro-hydraulic NC drive of the incline 14 via the programmable stroke position adjustment of the working piston of the Incline cylinder 86 executed automatically by the machine control. Of course it could the stroke position adjustment can also be entered manually.

It should be mentioned again that the pulling in of the wire, the adjustment of the outer diameter a cylindrical spring or the initial diameter of a shaped spring, the change in diameter in the production of form springs, the setting of the cutting tool starting position, the definition of the cutting stroke, the pivoting of the cutting device, the setting of the Incline tool starting position, the incline tool movement, the cutting mandrel clamping, if necessary, the mandrel displacement and the height adjustment of the cutting device completely program controlled via the sequence program of the spring coiling machine.

However, this should not rule out that one or the other work or adjustment process (e.g. the Size of the cutting stroke, the pivoting in and out of the cutting device) not without Computer support can be done.

• Maßnahmen zum Umbau der beiden Windeapparate 44 und 46 von Rechts- auf Linkswinden siehe DE 92 13 164 U1.
• Der Schneidzylinder wird jetzt zum Steigungszylinder und umgekehrt der Steigungszylinder zum Schneidzylinder, so daß die Schneidwerkzeugaufnahme 158 samt Schneidwerkzeug 38 und die Steigungswerkzeugaufnahme 232 in den jeweils anderen Zylinder getauscht werden müssen und ein Steigungswerkzeug für Linkswinden eingesetzt werden muß.
• Wechseln des Abschneidedorns 150 und der Dornspanneinrichtung 152 vom oberen Dornträger 144 in den unteren Dornträger 226.
• Entnehmen der Verbindungsstange 126 vom oberen Schwenkhebel 120 und vom oberen Gabelflansch 130 durch Entfernen der Bolzen 124 und 132.
• Verbinden des freien Hebelarms 256 des unteren Schwenkhebels 252 mit zwei Rollen 115 und des unteren Gabelflansches 236 mittels der ausgebauten Verbindungsstange 126.
• Festsetzen des oberen Gabelflansches 130 und des mit ihm verbundenen oberen Dornträgers 144 an dem oberen Führungsschlitten 170 durch Entfernen des Fixierbolzens 240 aus dem unteren Gabelflansch 236 und sein Einsetzen in den oberen Führungsschlitten 170 sowie Einschrauben in den oberen Gabelflansch 130. Die Schwenkbewegung der Schneideinrichtung 16 aus der Schneidebene heraus leitet jetzt die untere Schwenkeinrichtung 88 ein, während die obere Schwenkeinrichtung 82 inaktiviert, d.h. schwenkunbeweglich ist.

All the details described so far are valid for the production of right-handed springs, in which the spring body forms upward with respect to a horizontal plane with the wire guide axis 48. If the spring coiling machine according to the invention is now to be converted for the production of left-hand coiled springs, in which the wire is deflected downwards during winding by the winding tools 32 and 34, the procedure is as follows:

• For measures to convert the two winch units 44 and 46 from right-hand to left-hand winches, see DE 92 13 164 U1.
• The cutting cylinder now becomes the pitch cylinder and vice versa the pitch cylinder becomes the cutting cylinder, so that the cutting tool receptacle 158 together with the cutting tool 38 and the pitch tool receptacle 232 must be replaced in the other cylinder and a pitch tool for left-hand winds must be used.
• Change the cutting mandrel 150 and the mandrel clamping device 152 from the upper mandrel carrier 144 to the lower mandrel carrier 226.
• Remove the connecting rod 126 from the upper pivot lever 120 and from the upper fork flange 130 by removing the bolts 124 and 132.
• Connecting the free lever arm 256 of the lower pivot lever 252 to two rollers 115 and the lower fork flange 236 by means of the removed connecting rod 126.
• Fixing the upper fork flange 130 and the upper mandrel carrier 144 connected to it to the upper guide carriage 170 by removing the fixing bolt 240 from the lower fork flange 236 and inserting it into the upper guide carriage 170 and screwing it into the upper fork flange 130 the lower swiveling device 88 now initiates from the cutting plane, while the upper swiveling device 82 deactivates, ie is immovable.

The invention is not limited to the above embodiment. There can be a number of changes and modifications are made without departing from the spirit of the invention. For example, instead of the electro-hydraulic NC (linear) drives for cutting and Slope electro-pneumatic NC drives can be used, or else it could be for program-controlled Swiveling the cutting unit in and out and for height adjustment of the Cutting device 16 instead of the controllable (electric) servo motors 98 and 188 e.g. one adjustable, hydraulic or pneumatic rotary drive or one direct drive linear drive each Find use.

REFERENCES LIST

10 =

Wire feeding

12 =

Wind station

14 =

Incline device 12

16 =

Cutting device

18 =

Wire feed rollers 10

20 =

wire

22 =

Wire guide

24 = 26 =

Left front wall of the machine frame 28

28 =

Machine frame

30 = 32 =

Winding tool 12

34 =

Winding tool 12

36 =

Incline tool 14

38 =

Cutting tool 16

40 = 42 =

Right front wall of the machine frame 28

44 =

Winch

46 =

Winch

48 =

Wire guide axis 22

50 = 52 =

wave

54 =

adjustable servo motor

56 =

Control curve

58 =

roll

60 =

lever

62 = 64 =

Control curve

66 =

role

68 =

lever

69 =

Articulated rod

70 =

wave

72 =

Timing belt transmission

74 =

adjustable servo motor

76 = 78 =

NC valve

80 =

Cutting cylinder 16

81 =

Housing 80

82 =

upper swivel device

84 =

NC valve

86 =

Incline cylinder 14

87 =

Housing 86

88 =

lower swivel device

90 = 92 =

Rear wall of the machine frame 28

94 =

console

96 =

Angular planetary gear

98 =

adjustable servo motor

100 =

Gearbox drive shaft journal 96

102 =

Drive flange

104 =

ring

106 = 108 =

Spacer ring

110 =

Tooth lock washer

112 =

Control curve

114 =

roll

115 =

roll

116 =

Arm of the upper pivot lever 120

118 =

bolt

120 =

upper pivot lever

122 =

other arm of the pivot lever 120

124 =

bolt

126 =

Connecting rod

128 = 130 =

upper fork flange

132 =

bolt

134 =

Rod end 126

136 =

Rod end 126

138 =

Turnbuckle 126

140 = 142 = 144 =

upper mandrel carrier

146 = 148 =

Breakthrough of the mandrel carrier 144

150 =

Cutting mandrel

152 =

Mandrel clamping device

154 =

Piston rod 80

156 =

Location bore of the piston rod 154 of the cutting cylinder 80

158 =

Cutting tool holder

160 = 162 =

traverse

164 =

Leadership

166 =

camp

168 = 170 =

upper carriage

172 =

Arm of the carriage

174 = 176 =

Pin of the cutting cylinder 80

178 =

Swivel axis

180 = 182 =

camp

184 =

Worm gear

186 =

Intermediate flange

188 =

adjustable servo motor

190 =

spindle

192 =

Axial deep groove ball bearings

194 =

Adjusting nut

196 =

Tooth lock washer

198 = 200 =

Male thread of spindle 190

202 =

Flange threaded bush

204 =

Flange of the threaded bush 202

206 = 208 =

Guide rod

210 =

camp

212 = 214 = 216 =

lower carriage

218 =

Arm of the guide carriage 216

220 = 222 =

Pin of the pitch cylinder 86

224 =

Breakthrough 226

226 =

lower mandrel carrier

228 =

Piston rod 86

230 =

Location bore of the piston rod 228 of the pitch cylinder 86

232 =

Incline tool holder

234 = 236 =

lower fork flange

238 = 240 =

Fixing bolt

242 = 244 =

(Swivel) axis of the pin 222

246 = 248 =

Connecting rod

250 = 252 =

lower pivot lever

254 =

bolt

256 =

Arm of the pivot lever 252

Claims (13)

1. Device for the shaping of wire, especially a universal spring winding machine, with a wire guide (22) which ends at a wire forming station (12), in which are arranged forming tools (32, 34, 36) and wire cutting tools (38, 150) of a cutting device (18), which tools process the endless wire running in and which cutting device comprises a drive (80) of its movable cutting tool (38), which co-operates with a cutting tool (150), which is stationary during the cut, in order to cut the wire at the location of the coming together of the two cutting tools (38 and 150), characterised in that a fluid-operated piston-cylinder unit (80) with a program-controllable NC valve (78) is provided as cutting tool (38) drive, wherein the movable cutting tool (38) is fastened by means of a receiver (158) to the movable unit part (154), the movement direction of which corresponds with the shearing direction of this cutting tool (38), and that the stationary unit part (81) is translationally and/or rotationally movable away and back in at least one direction, which deviates from the movement direction of the movable unit part (154) from the forming plane extended by the wire guiding direction and shearing direction.
2. Device according to claim 1, characterised in that the stationary unit part (81) is mounted on an arm (172), which is stationary during the cutting, to be rotatable about a pivot axis (178) perpendicular to the movement direction of the movable unit part (154) and parallel to the wire guide direction and is pivotable away and back in at least one direction by means of a pivot drive (98, 96, 100, 112, 114, 120, 126) from the forming plane (Fig. 1) extended by the wire guiding direction and the shearing direction.
3. Device according to claim 2, characterised in that the stationary unit part (81) is fastened to a part (144), which carries the stationary cutting tool (150), and this is pivotably connected with the pivot lever (120) of a shape-locking cam gear (112, 114) of the pivot drive (98, 96, 100, 112, 114, 120, 126).
4. Device according to claim 2 or 3, characterised in that the mounting arm (172) is provided with a carriage (170), which slides at a guide rod (164) extending parallelly to the shearing direction and is displaceable by means of a displacing drive (188, 184, 190).
5. Device according to claim 4 with 3, characterised in that the carriage (170) and the tool carrier (144) are fastenable to one another by means of a releasable, rigid connection (240).
6. Device according to one of claims 1 to 5, one of the forming tools (36) of which is movable by means of a drive antiparallelly to the shearing direction of the cutting tool (38), characterised in that a second fluid-operated piston-cylinder unit (86) with a program-controllable NC valve (84) is provided as forming tool (36) drive, wherein the movable forming tool (36) is fastened by means of a receiver (232) to the second movable unit part (228), the movement direction of which is opposite to the movement direction of the first movable unit part (154).
7. Device according to claim 6, [characterised in] that the second stationary unit part (87) is mounted on a second arm (218), which to stationary during the forming, to be rotatable about a pivot axis (244) perpendicular to the movement direction of the second movable unit part (228) and parallel to the wire guiding direction and is pivotable away and back in at least one direction selectably by means of a second pivot drive (98, 96, 100, 112, 114, 120, 126) from the forming plane (Fig. 1) extended by the wire guiding direction and the shearing direction.
8. Device according to claim 7 with 3, characterised in that the second stationary unit part (87) is fastened to a second part (226), which is equipped for the selectable carrying of the stationary cutting tool (150), and this is selectably pivotably connectible with a second pivot lever (252) of a second shape-locking cam gear (112, 115) of the second pivot drive (98, 96, 100, 112, 114,120,126).
9. Device according to claim 7 or 8, characterised in that the second mounting arm (218) is provided with a second carriage (216), which slides at a guide rod (208) extending parallelly to the shearing direction and is adjustable by means of a displacing drive (188, 184, 190).
10. Device according to claim 9 with 8, characterised in that the second carriage (216) and the second tool carrier (226) have a releasable rigid connection (240) with one another.
11. Device according to claim 9 with 4, characterised in that the two slides (170 and 216) are rigidly connected together by means of a rod (248) and are provided with a common displacing drive (188, 184, 190).
12. Device according to claim 8, characterised in that a displaceable rod (126) is provided for the selectable articulated connection of the first or second tool carrier (144 or 226) with the first or second pivot lever (120 or 252).
13. Device according to claims 3 and 8, characterised in that the two pivot drives (98, 96, 100, 112, 126 and 114, 120 or 115, 252) are identical up to separate roller pairs (114 or 115) at separate pivot levers (120 or 252).

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