DE1922524A1 - Additional arrangement for a press for the purpose of stripping - Google Patents

Description

Additional arrangement for the purpose of stripping

a press

Priority ι May 3, 1968; Great Britain} No. 21012/68

Preases for pressing electrical connection terminals on Conductor wires can be provided with means for stripping the end of an insulated conductor wire, which by means of the Press an electrical connector to be pressed, be provided or not. Presses that have no means for stripping the wire, are used when the insulation is not removed from the wire end needs to be d. H. when the connecting clamps have means for penetrating the insulation, e.g. B. lancets, which penetrate the wire insulation and cause electrical contact with the core of the wire, or even if the press dies are designed to cause the connecting terminal to remove the enamel insulation of the lead wire breaks through, so that the connecting terminal makes electrical contact with the core of the wire.

909847/0826

Bavarian Association Munich 820803

It would be impractical to zira a well-known press with funds Remove the insulation to be used if the end of the wire is not to be stripped, as this means for Stripping with the press to form a whole and not simply dismantled from the press or ineffective can be set.

An additional arrangement for the purpose of stripping insulation for a press for pressing on an electrical connecting terminal to the end of a lead wire, the press having a pair of terminal press dies shown in are moved with respect to each other from an open to a closed position to a substantially U-shaped To press the ferrule of an electrical connection terminal onto the end of a conductor wire when the ferrule and the Wire ends are inserted between the mattresses, the additional arrangement being a stripping device with insulation cutting blades compresses, is characterized according to the invention in that the stripping device together with a wire jig attached to the press with the insulation severing knife on one side of the Matrices of the press are arranged that the wire clamping. mechanism between a first position in alignment "with the insulation cutting knives of the stripping device and

a second position is movable in alignment with the pressing dies of the press and the insulation severing knife so are arranged so that they strip the insulation from the end of the electrically conductive inner conductor of an insulated conductor wire, when the lead wire from the wire clamping mechanism is taken when this is in its first position, and that the wire clamping mechanism in

909847/0626

BATH ORIGINAL

its second position brings the stripped end of the inner conductor between the dies.

The wire clamping means can have wire gripping jaws, the Bind attached to a device which is pivotable to move the wire clamping means between their first and second positions, the device z. B. may be a piston-cylinder arrangement that moves the jaws between an open and a closed position and is pivotable about an axis which is parallel

extends to the longitudinal axis of the wire end when the same is gripped by the jaws.

The wire clamping means can also be arranged for rectilinear movement between their first and second positions. For this purpose, the piston-cylinder arrangement, instead of being pivotably arranged, on the Be attached to a piston of a second piston-cylinder arrangement.

Preferably the jaws have flat surfaces which cooperate to grip the end of the wire between them. "These flat surfaces may have protrusions for guiding the wire which extend in the direction of relative movement of the jaws. One located on a jaw The projection for guiding the wire can be slidably received in a slot in the other jaw.

The stripping device can be of the type described in ν of another German patent application of the applicant * ■ is written, whereby the isolation · separating eggs does there « Wire end closable and, and indeed, by means of tint · movable knife actuation parts · against the action of a first Spring, the closing of the knife by a stop

909847/0626

is limited so that the blades cut off substantially some of the insulation from the end of the wire, but the . Do not cut through the electrically conductive core of the wire. The knife operating part is arranged so that it pulls the knives with it around the wire following the closing in order to pull the knives away from the wire end against the action of a second spring, the force of which is greater than that of the first spring, on the separated part remove the insulation from the end of the wire.

The operation of the press can be initiated by an electrical switch, e.g. B. a foot switch. The desk can optionally be connected to a first circuit

be, which is designed so that both the stripping and the pressing process automatically after actuation of the Switch to run; the switch can also be connected to a second circuit designed in this way is that after pressing the switch only the pressing process is carried out.

The switch can activate a first hydraulic valve to cause the wire gripping means to hold the wire end seize, and then to cause the knife actuation the insulation severing knife closes and moves with you; then the switch can activate a second hydraulic valve to cause the Wire clamping means are brought from their first to their second position in order to activate means that control the dies cause the connector to attach to the exposed end of the lead wire. One of the matrices can be arranged in such a way that after the pressing operation has been carried out a third hydraulic valve activated to the first and

909847/0626

AMP 2484

second hydraulic valve reset so that it holds the wire clamping means and the stripping device in its Return starting positions with the second valve upon reset causing the third valve to reset will.

The hydraulic valves can easily consist of a standardized valve assembly attached to the frame of the press can be.

The invention is explained in more detail below using an exemplary embodiment in conjunction with the drawings. In the drawings show:

Figure 1 is a side elevation of an additional arrangement for stripping with a stripping device, partly in section, for a press for pressing electrical connection terminals on Lead wires;

FIG. 2 shows an enlarged plan view of a detail of a stripping device;

FIG. 3 is an enlarged plan view showing the mode of operation of the stripping device;

FIG. 4 shows a top view from the front of the additional arrangement after mortage on the press, which is shown in FIG shown in broken lines;

Figure 5 is an enlarged perspective view of part of a strip of electrical Connecting clips for use with the press; and

FIG. 6 shows a diagram of the electro-pneumatic operating circuit of the additional arrangement.

909847/0626

AMP 2484 - 6 -

Like Pig. 1 shows that in the aforementioned patent application Stripping device described by the applicant on a carriage 1 which slides in a housing 2 with Supports 3 is arranged, which are attached to a sheet metal frame 100 of the additional arrangement. A lever 4 is rotatable connected between its ends to the carriage 1 by means of a pivot 5. A roller 101 can be rotated on the in Pig, 1 right end of the lever 4 can be arranged. A first insulation cutting knife 6 is at the left end of the in Fig. 1 Lever 4 is fixed and extends at right angles to the longitudinal axis of the lever 4, the knife 6 being one of the Wire reception serving V-shaped notch 7 on her has lower (in Pig. 2 and 3) end. An insulation severing knife 8 similar to knife 6 is shown in Pig. I left

Attached to the end of a support plate 9 attached to the carriage 1. An upright wire stop 10 is fastened to the plate 9 by means of a fastening element 11, the The stop 10 is axially adjustable with respect to the plate 9. A first spring 12 acts between the plate 9 and the lever 41 around the lever 4 clockwise around the pivot 5 (see. Pig. 1) to pan. A stop screw 13 is screwed into a threaded hole (not shown) in the lever 4 and runs between the lever 4 and the plate 9. At the right-hand end of the housing 2 in FIG. 1 is a cylinder 14 "£ * a pneumatic piston-cylinder arrangement fixedly arranged, the arrangement having a piston rod 15 with a head 16 which carries a cam 17. A second spring 18, the force of which is greater than that of the spring 12, acts between the carriage 1 and a plate 19 arranged on the cylinder 14 in order to push the carriage 1 to the left in FIG.

909847/0626

AIiP 2484 - 7 -

The frame 100 has a flat metal plate 20 to which the carriers 3 are attached, as well as a plate 22, the is attached to the plate 20 and extends perpendicular to the plane of the plate 20. On the side of the plate 20, on which the carrier 3 are attached, opposite side, a bracket 24 (Pig. 4) is arranged in which pivotally mounted a cylinder 26 of a pneumatic piston-cylinder arrangement, the arrangement a Has piston rod 28 which carries a fork head 50 in which an arm 32 is pivotably attached to a cylinder 34 of a further piston-cylinder arrangement which is attached to the plate 22 by means of a pivot 36, is attached. The cylinder 34 has a piston rod 38 which has a first wire gripping jaw 40 with a wire in Contacting flat surface 41 carries, the surface 41 having a first wire guide serving projection 42 has. Another wire gripping jaw 44, which is fixedly arranged on the cylinder 34 by means of a carrier 46 is, has a slot 43 in which a second wire guide serving projection 45 of the jaw 40 slides, and also has a flat surface 47 in contact with the wire. At its in Pig. 1 and 4 lower end

the plate 22 has a plunge 48 which (like Pig. 4 shows) on the base plate 49 of a press 200 (shown in broken lines) for pressing electrical connection terminals on rests on lead wires. The splash is detachable by means of screws (not shown) on the base plate 49 attached, the plate 20 also releasable by means of screws, not shown, on a stand 50 of the Press frame is attached. A tool holder 52 is arranged at one end of a press ram 54, the latter

909847/0626

AMP 2484 - 8 -

is slidably mounted in the press frame and a pressure die 56 carries with a clamp pressing recess 58, which forms the working surface of the die 56. Under the "die 56" an anvil support element 60 is arranged in which a pressure anvil 62 is attached, which forms a pressure male part to be received in the recess 58. The press 200 • has not shown means for feeding electrical connection terminals 300 (FIG. 5) in strip form, of which each has a pressure clamp 64 with a U-shaped section and an electrical connection part in the form of an annular tongue 66, toward the anvil 62. The connector strip is arranged so that a feed finger (not shown) at a time the strip advances the length of a connecting terminal in a direction which runs perpendicular to the plane of FIG. 4 and in the direction of the viewer, around the pressing clamp 64 of each connecting terminal to position on the anvil 62. The feed finger can e.g. B. by one operated by the plunger 54 Linkage (not shown) are activated.

Reference is now made to FIG. When an electric foot switch 67 is activated, it switches on a valve Vl, so that compressed air from a main compressed air duct M through a Unconstrained channel 68 is fed to the cylinder 34 to cause the piston rod 38 to counteract the action of the Spring 69 is advanced to move jaw 40 toward jaw 44, thereby closing those jaws. Activation of switch 67 also causes compressed air through

by

the valve V1 / a narrowed channel 70 is fed to the cylinder 14 is to retract the piston rod 15 »which is normally fully extended. While withdrawing the piston rod 15 triggers a projection 72 on the piston rod 15 a microswitch 74, so that compressed air from channel M via a resilient valve V2 through an inward

909847/0 6-2 6 ..

BATH ORIGINAL

AMP 2484 - 9 -

narrow channel 76 is fed to the cylinder 26, so that the normally fully extended piston rod 28 is fully retracted to cause cylinder 34 is gradually turned clockwise (in Pig. 4) until the jaws 40 and 44, which are now closed, face each other the free space between the anvil 62 and the recess 58 of the die 56. When the piston rod 28 is completely is withdrawn, the cylinder 34 triggers a microswitch 78 which activates an electromagnet 79 to Closing of the contacts 83 »around a clutch actuated by a control pulse for a certain period of time (one-shot clutch) (not shown) to operate the plunger 54 with a continuously running electric motor (not shown) to be coupled so that the plunger 54, which is normally in its upper dead position, by a working stroke, d. H. a downstroke in FIG. 4. When the plunger reaches its bottom dead position, a protrusion releases 81 of the plunger 54 a microswitch 80 to switch a valve V3 for the purpose of resetting the valve V1 so that the air is vented from the cylinder 34 so that the piston rod 38 is retracted by the spring 69

will. Umgßhaiten the valve Vl also causes compressed air from the main channel M to the cylinder 14 via a channel 91, so that the piston rod 15 of the cylinder 14 is advanced. During the advance of the piston rod 15, the projection 72 triggers the holder 74, to cause the valve V2 to be reset by means of its spring, so that the rod 28 of the cylinder 26 is advanced will. The valve V3 is reset as a result of the resetting of the valve Vl. The ram is automatic brought back to its top dead position.

909847/0626

The terms "constricted" and "unconstricted" used above are relative? the effective cross-section of the channels 68, 70 and 76 is adjustable by means of throttle bodies T. The valves V1 to V3 are preferably in a single arrangement provided, which is releasably attached to the press frame or arranged in one on the side of the press 200 Container can be arranged.

At the beginning of a work cycle, the parts are in. their normal position. So the jaws 40 and 44 are open, the cylinder 34 is in the angular position shown in FIG. 4, and the piston rod 15 is fully extended, so that the cam 17 lies between the pin 5 and the spring 12. The lever 4 is accordingly from the spring 12 pressed into a completely clockwise position around the pin 5, so that the cutter 6 and 8 fully open are. One end 400 of an insulated electrical conductor wire with an insulation 500 and an electrical conductive inner conductor 600 is now inserted between the open jaws 40 and 44 (FIG. 4), specifically in the direction indicated by arrow A in FIG. The wire end 400 is advanced to its extreme end after

it has been pushed through the notch 7 provided in the knife 6, comes into contact with a wire stop 10, wherein a wire guide, not shown, is preferably provided

is for feeding the wire end 400 through the notch 7 and against the stop 10. The foot switch 67 is now depressed so that the piston rod 38 is extended first is to the jaws 40 and 44 (Fig. 1) around the wire end 400 which is firmly clamped between the flat surfaces 41 and 47 of the jaws 40 and 44. Through this, that these surfaces are flat becomes a permanent one

909847/0626

AMP 2484 - 11 - 1 9 ^ 26 * 24

Deformation of the insulation 500 hardly occurs. As a result of that the channel 70 is narrowed, the piston rod 15 is retracted with a delay, i. H. then to the complete Closing the jaws 40 and 44 around the wire end, so that the cam 17 from its normal position in which the free The end of the cam 17 is slightly to the left (in Pig. I) of the pin 5, is moved into the position which the cam in Fig. 1 assumes. During this movement of the cam 17, the cam 17 comes into engagement with that on the lever 4 arranged en roller 101 and rotates the lever 4 against the Action of the spring 12 until the stop screw 13 contacts the plate 9, as shown in FIG. 1. This will make the Knives 6 and 8 closed around the wire end 400 so that the edges of the V-shaped notches of the knives 6 and 8, essentially sever a portion 700 of the insulation 500 from the end of the wire, as best seen in FIG. While the continuation of the withdrawal, d. H. of the working stroke, the piston rod 15 is the carriage 1 against the Plate 19 pulled by means of the cam 17, since the lever 4 is locked against further rotational movement as a result of the Action of the screw 13 against the plate 9. Accordingly, the knives 6 and 8 are moved axially away from the wire end 400, which against movement with respect to the frame

2 is held by jaws 40 and 44, thus pulling the cut portion 700 of the insulation from the end of the Head 600 away. The piston rod 28 is now withdrawn as a result of the retraction of the piston rod 15, so that the Cylinder 54 and thus the jaws 40 and 44, which are now stripped wire end 400 are closed around, in . their fully clockwise angular position can be moved. The distance between the jaws 4pund "44 and the stop

909847/0626

1.0 in the starting position of the file is such that in the completely right-facing position of the cylinder the stripped end of the wire end 400 at the pressure clamp 64 of a connecting clamp 300 lies on the anvil 62, this connecting terminal during the previous return stroke of the plunger 54 by the feed finger on the "The anvil has been pushed. As the cylinder 34 reaches its full real division, the ram 54 is lowered, d. H. he performs a working stroke to the ferrule 64 of the connecting clamp 300 on the anvil 62 to the stripped At the end of the conductor $ θ &, the latter through the Walls of the recess 58 is guided into the clamp 64. When the ram makes its return stroke, the jaws 40 and 44 open so that the end of the wire with the pressed against it Connector clip 300 can be removed from position between die 56 and anvil 62, wherein the piston rod 15 returns to its fully extended position and the cylinder 34 to its fully left Angular position returns.

The jaws 40 and 44 can be arranged to open after the cylinder 34 has returned to its fully left angular position. However, as it may be sometimes the case, the connection terminal 300 is of the type that its clamp 64 is stuck in _t recess 58 of the Andrückmatrize after the pressing operation, the jaws should be 40 and 44 arranged so that they are opened as soon as the plunger 54 begins its return stroke.

If the additional arrangement serving for the purpose of stripping insulation is not to be used, the foot switch 67 of

909847/062 6-.

the valve Vl are released and reconnected to terminals 92 of the electromagnet 79, so that the Solenoid 79 is activated when foot switch 67 is depressed to cause plunger 54 is driven by its working and return stroke. The valves Vl to V5. And their associated electro-pneumatic In this case, elements are not connected.

Patent claims:

909847/0626

Claims (5)

Claims 1. The purpose of stripping additional arrangement for a press for pressing an electrical connecting terminal to the end of a lead wire, the press having a pair of terminal press dies shown in be moved with respect to each other from an open to a closed position to a substantially U-shaped To press the ferrule of an electrical connection terminal onto the end of a conductor wire when the ferrule and the Wire ends are inserted between the dies, the additional arrangement being a stripping device with insulation cutting blades squeezes, characterized that the stripping device (1, 2, 4, 6, 8, 12, 17, 18) are arranged on the press (200) together with a wire clamping device (40, 41, 44, 47), wherein the insulation severing knives (6, 8) are arranged on one side of the dies (58, 62) of the press (200) in that the wire clamping mechanism (40, 41, 44, 47) between a first position in alignment with the insulation stripping blades (6, 8) and a second position Position is movable in alignment with the pressure dies (58, 62) of the press (200) and the insulation cutting knife are arranged so that they insulated the insulation (500) from the end of the electrically conductive inner conductor (600) of a Strip the lead wire when the lead wire is gripped by the wire clamping mechanism (40, 41, 44, 47) when this is in its first position, and that * the wire # £ tensioning mechanism (40, 41, 44, 47) in its second position brings the stripped end of the inner conductor (600) between ξΐΐβ matrices (58, 62). 9098Λ 7/0626 2. Arrangement according to claim I _1, characterized in that the Atiisoliervorrichtung (1, 2, 4, 6, 8, 12, 17, 18) and the wire clamping device (40, 41, 44t 4-7) on a frame (20, 22 ) which can be effectively connected to the press (200). 3. Arrangement according to claim 1 or 2, characterized g e - mark i chnet the wire clamping mechanism (40, 41, 44, 47) wire gripping jaws (40, .44) which on a piston-cylinder arrangement / 'are arranged to the Move jaws between an open and a closed position, with the piston-cylinder assembly around an axis is pivotable which is parallel to the longitudinal axis of the wire end when the wire is removed from the jaws (40, 44) is gripped between the first and second positions. 4. Arrangement according to claim 3, characterized that the wire gripping jaws (40, 44) have flat surfaces (41, 47) which cooperate, to clamp the wire between them. 5. Arrangement according to claim 4, characterized that the flat surfaces (41, 47) are provided with wire guide projections (42, 45) which extend in the direction of the relative movement of the jaws (40, 44). 909847/0626 ORIGINAL INSPECTED 4b Blank page