CH700204B1

CH700204B1 - Separating and Abisoliereinrichtung for a cable processing machine.

Info

Publication number: CH700204B1
Application number: CH00051/10A
Authority: CH
Inventors: Peter Schuetz; Thomas Wortmann
Original assignee: Schleuniger Holding Ag
Priority date: 2009-01-15
Filing date: 2010-01-14
Publication date: 2014-03-31
Also published as: CH700204A2; DE102010004781B4; DE102010004781A1

Abstract

13) in the direction of the cable to be disconnected. According to the invention, the drive is a programmable electric motor (1) which is connected to a crankshaft, and according to the invention, a first eccentric is provided on the crankshaft with a first connecting rod (8) for raising and lowering the first knife block (11) and also on the crankshaft A second eccentric is arranged with a second connecting rod (9) for simultaneously lowering and lifting the second knife block (13).

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a separation and stripping device for a cable processing machine, comprising at least one common drive for two counter-moving knife blocks with at least one stripping knife pair and one pair of severing knives, the first knife of the stripping knife pair and the first knife of the pair of severing knives In the first knife block and the second knife of the pair of stripping blades and the second knife of the pair of cutters are arranged in the second knife block and wherein a cable to be cut and stripped is arranged along its central axis between the first and second knives of the stripping knife pair and the pair of cutters by means of a line conveyor and a Gripper and the drive moves the knife blocks in the direction of the cable to be separated.

[0002] Such separating and stripping devices are known for cable processing machines or crimping centers, for example the applicant, which uses drives in which belt drives for threaded spindles are arranged both above and below the cable swivel plane.

DE 3 601 850 A1 discloses a separating and stripping device which is actuated by a barrel cam which is circulated by a continuously revolving electric motor. The barrel cam has two cam tracks, namely an eccentric clamping / cutting track and a sinusoidal stripping / recoil track on its cylindrical peripheral surface. Each cam track is provided with a linkage in contacting connection with the work steps, closing the cable clamping device, closing the stripping / stripping head for cutting the cable and cutting the insulation, stripping the cut insulation by moving the cable clamping device and opening the stripping / stripping head ,

A disadvantage of such a separating and stripping device is that the movements of the isolating / stripping head are forcedly controlled via the cam tracks of the barrel cam and can only be changed by exchanging the cam disks. Also, a single-chip "cut and strip unit" is not suitable as a separating and stripping device with a central drive according to DE 3 601 850 A1 for a cable processing machine or a CrimpCenter, in which high numbers of individual cables have to be produced. Moreover, this separating and stripping device has a plurality of individual parts.

US Pat. No. 5,038,457 discloses devices for producing cable trees with wire cutting means. A motor with a controlled motor drive and at least one belt drive transmits the rotational movement of the motor to a plurality of shafts / crankshafts, of which they are converted into linear movements, which move two knife holders, which are supported displaceably on slides, towards and away from one another.

[0006] For this purpose, in a first embodiment, a rotatably mounted pulley is mounted on the upper part of a base frame. A belt transmits the rotational movement of the motor to the belt pulley, which is connected to the upper knife holder via a shaft, which is likewise mounted in the base frame, and connecting members. At the same time, the pulley is connected to the lower knife holder via a plurality of connecting members and a second shaft supported in the lower portion of the base. If the belt pulley is rotated counterclockwise by means of the motor, the knife holders, which are guided in a guide frame, move towards one another with their knives, the knives closing for the wire processing. If the pulley is then rotated clockwise by the motor,

[0007] In another embodiment, a controlled motor drive is described with a lower and an upper drive mechanism, wherein the lower drive mechanism for the lower knife holder is connected to the upper drive mechanism for the upper knife holder by transfer mechanisms arranged on both sides of the knife holders , The rotating movement of the motor is transmitted to two first shafts via two rollers each with belt drives. Each of these shafts is connected to an eccentric shaft, which produces a linear movement by means of lever and cam follower and transmits it on both sides via a pin to the lower knife holder. The transmission mechanisms ensure the two-way synchronous transmission of the rotary movement to two second shafts, Which are likewise connected with an eccentric shaft as well as a lever and a cam follower on both sides to an upper pin which moves the upper knife holder synchronously in an opposing movement to the lower knife holder. Overall, this embodiment has three belt drives, a connecting shaft for the synchronization of the transmission mechanisms, four further shafts, four eccentric shafts, two lateral coupling bars for the synchronized movement transmission and two coupling arms on the knife holders.

[0008] In these two embodiments according to US Pat. No. 5,038,457 A, it is disadvantageous that they have a very high number of components and bearing locations. The moving masses are very large and the reproducibility is reduced by a very large number of bearings, which are bound to play. The dynamics of the systems are also very limited by the large moving masses and bearing positions.

In a further embodiment of US Pat. No. 5,038,457, the two knife holders, which are mounted on linear guide slides, are each provided with a threaded nut, one threaded nut having a right-hand thread and the other threaded nut having a left-hand thread. The threaded nuts are connected to a shaft mounted in the base frame, the shaft having a right-hand thread at its one end and a left-hand thread at its other end.

The shaft is connected to a controlled motor drive via a belt drive and in this way transmits a counter-synchronized movement to the two knife holders. This embodiment has only a few moving components and masses. However, this system has the disadvantage that the travel movements of the knife holder slides and the exact positioning are the same over the entire travel distance as a function of the thread pitch and spindle speed. This requires unnecessarily large drive motors.

[0010] This also applies to the wire processing device according to EP 0 715 384 A. In this publication, adjustment spindles are described, which are set into a rotary movement by a controlled drive motor. Two nuts are arranged on the adjusting spindles, each of which is connected to a rod. As the spindle rotates in a direction about its axis, the nuts axially move apart on the spindle threads to move the one rod to the right and the other rod to the left. In this way, the knife pairs arranged in knife holders are opened and fired.

SUMMARY OF THE INVENTION The object of the invention is therefore to provide a separating and stripping device for a cable processing machine which is low in maintenance, whose energy consumption is very low, which can be produced at low cost No damage to the cable harness occurs.

[0012] This object is achieved by the invention characterized in claim 1.

According to the invention, the drive is a programmable electric motor which is connected to a crankshaft, and according to the invention, a first eccentric is provided on the crankshaft with a first connecting rod for raising and lowering the first knife block and also a second eccentric with a second connecting rod to the crankshaft Simultaneously lowering and raising the second knife block. Preferably, the second connecting rod operates in the opposite direction to the first connecting rod. The programmable electric motor may be a servo motor or a stepper motor. In a preferred embodiment of the invention, the programmable electric motor is connected to the crankshaft via a positive-locking traction mechanism. However, the programmable electric motor can also be connected to the crankshaft via a gear transmission.

According to a preferred embodiment of the invention, a slide cam with at least one roller guide is arranged on a basic housing, at least one roller being movably guided in the roller guide, and the roller being connected to the second cutter block as well as by a lever mechanism Is connected to a centering plate.

According to a preferred embodiment of the invention, the knife blocks mounted on knife slides can move along at least one linear guide rail during simultaneous raising and lowering, and when the knives arranged in the knife blocks are closed, the roller forced in the guide curve lifts the centering plate for supporting and centering the knife Cable during the stripping and separation process.

[0016] The advantages of this invention consist, in particular, in the fact that the feed paths can be freely programmed, for example, by virtue of a servo drive. Therefore, no cam disks or eccentric disks must be replaced during conversion to another cable cross-section. This considerably reduces the changeover times. The separating and stripping device according to the invention operates quickly and precisely in a cable processing system and consists only of a few individual parts. The separating and stripping device according to the invention also has far fewer wearing parts. At least the movable components of the stripping and separating unit, in particular the connecting rods, are designed to be weight-reduced by the choice of light materials such as, for example, aluminum, So that the closing movement of the two knife blocks can be carried out more quickly by the crank drive at the same drive power. The energy consumption is minimal.

[0017] A further advantage is the always exact alignment of the cable to be processed through the roller guide for positioning the centering plate. Damage to the cable leads during the stripping process is successfully prevented in this way.

It is also advantageous that the toothed belt drive transmits the rotational movement from the engine to only one crankshaft with two eccentrics arranged directly next to one another. The short upper connecting rod converts the rotational movement of the first eccentric directly into a linear movement of the upper knife block while the longer cranked connecting rod converts the rotary movement of the second eccentric into the counter-rotating linear movement of the lower knife block. The pairs of knives can perform a fast closing movement, whereby exact positioning of the cutting edges during cutting into the line insulation for stripping is ensured. In this way, even very thin lines can be processed without problems.

A further advantage over the prior art is the integrated line pre-centering, which is derived from the closing movement of the pair of knives.

[0020] The device according to the invention provides high performance and high repeatability. The masses to be moved by the controlled motor drive with storable parameters are minimal. Due to the minimal number of components, the cost of the components is greatly reduced. The compact design with low space requirements is particularly suitable for installation in a fully automatic crimping machine.

[0021] The invention is explained in more detail below with the aid of drawings. Show it:

1 shows a perspective view of the separating and stripping device in an exemplary embodiment when the measuring slides are open, FIG.

FIG. 2 shows the functional elements of the separating and stripping device according to the invention according to FIG. 1 in a side view,

FIG. 3 is an enlarged, partial sectional view of a portion of the isolating and stripping device according to the invention in a front view; FIG.

FIG. 4 is a partial enlarged view of the separating and stripping device according to FIG. 2; and FIG. 5 is a plan view of the separating and stripping device according to the invention shown in FIG.

1, the separating and stripping device for a cable processing machine according to FIG. 1 has, in a manner known per se, a basic housing 40, on the front side wall 27 of which a vertical guide rail 18 is vertically arranged. A first measuring slide 10 is arranged at a first end of the linear guide rail 18, and a second measuring slide 12 is arranged vertically displaceable at a second end of the linear guide rail 18. The first knife carriage 10 has a first knife block 11 in which a first knife of a stripping knife pair 14 is arranged on one side 1, a first knife of a stripping knife pair 15 is arranged on one side 2, and a first knife of a pair of cutters 16 is arranged in between. The second knife carriage 12 has a second knife block 13, In which a second knife of the stripping knife pair 14 is arranged on one side 1, a second knife of the stripping knife pair 15 is arranged on one side 2 and a second knife of the pair of cutters 16 is arranged in between. The cutters of the stripping knife pair 14, 15 and the pair of cutters are positioned opposite each other along the central axis 19 of a cable 45 to be separated and stripped. Laterally, the knife blocks 11, 13 additionally have a bad-dividing pair of knives 17 in a manner known per se. 15 and the pair of cutters are positioned opposite each other along the central axis 19 of a cable 45 to be separated and stripped. Laterally, the knife blocks 11, 13 additionally have a bad-dividing pair of knives 17 in a manner known per se. 15 and the pair of cutters are positioned opposite each other along the central axis 19 of a cable 45 to be separated and stripped. Laterally, the knife blocks 11, 13 additionally have a bad-dividing pair of knives 17 in a manner known per se.

A retaining plate 28 for a programmable electric motor 1 according to the invention is applied at a right angle to the front side wall 27 of the base housing 40. In this case, as in this exemplary embodiment, it may be a servomotor or, for example, a stepping motor. 1, the programmable electric motor 1 is connected to a crankshaft 5 via a positive-locking traction mechanism 42 such that a first toothed wheel 3 is arranged on the motor side, which drives a second toothed wheel 4 via a toothed belt 2 in a program-controlled manner.

The programmable electric motor 1 has a bearing regulation for an exact positioning of the knives.

The second toothed disk 4 is connected via a crankshaft 5 to a first eccentric 6 and a second eccentric 7, as shown in FIG. 3, the second eccentric 7 being arranged directly adjacent the toothed disk 4 and the first eccentric 6 directly to the second eccentric 7 Is arranged adjacently. The first eccentric 6 is introduced into a recess 29 in a first end region 30 of the first connecting rod 8 in the form of a first eccentric disc and the second eccentric 7 is introduced into a recess 31 in a first end region 32 of the second connecting rod 9 in the form of a second eccentric disc. In the direction of the second end region 33, the first connecting rod 8 has a material reinforcement in the form of a step 34 which is only slightly longer than the sum of the material thicknesses of the first connecting rod 8 and the second connecting rod 9. In its second end region 33, the first connecting rod 8 is connected to the first measuring slide 10 via a first axial fastening 35. As can be seen from FIG. 2, the second connecting rod 9 is angled in the direction of its end regions 32, 36. In its second end region 36, the second connecting rod 9 is connected to the second measuring slide 12 via a second axial fastening 37.

[0024] The first eccentric 6 and the second eccentric 7 preferably have an identical shape. This ensures that the opening and closing movement of the measuring slides 10, 12, which is transmitted via the first connecting rod 8 and the second connecting rod 9, always takes place uniformly and the respective closed position of the knife pairs 14, 15, 16 is always exactly in the central axis 19 or evenly spaced from This takes place.

1 to 4, the first end region 30 of the first connecting rod 8 is approximately at the same level with the circumferential end of the second toothed disk. The opening and closing movement, as shown in FIG 4, and the center axis of the first eccentric 6 is at its maximum position 38 opposite the central axis of the crankshaft 5. The center axis of the second eccentric 7 is, however, in the minimum position 39 opposite the center axis of the crankshaft 5, the first end region 32 of the second connecting rod 9 having rotated in the direction of the step 34 between the second gear disk 4 and the first eccentric 6 2 and 5). During the closing process, the crankshaft 5 moves the first eccentric 6 and thus the first connecting rod 8 in the direction of the central axis of the crankshaft 5 while rotating the first end region 32 of the second connecting rod 9 so far out of the center axis of the crankshaft 5 that its upper circumferential end is now rotated with the crankshaft 5 Of the second toothed disk 4 approximately. Whether or not the measuring slides 10, 12 are traversed to the maximum closing position along the linear guide rail 18 for the purpose of stripping, or only to the separation position, which is reached earlier in the case of a lowering pair of cutters 16, is controlled by the programmable electric motor 1. That its upper peripheral end now approximately closes with the second toothed disc 4. Whether or not the measuring slides 10, 12 are traversed to the maximum closing position along the linear guide rail 18 for the purpose of stripping, or only to the separation position, which is reached earlier in the case of a lowering pair of cutters 16, is controlled by the programmable electric motor 1. That its upper peripheral end now approximately closes with the second toothed disc 4. Whether or not the measuring slides 10, 12 are traversed to the maximum closing position along the linear guide rail 18 for the purpose of stripping, or only to the separation position, which is reached earlier in the case of a lowering pair of cutters 16, is controlled by the programmable electric motor 1.

2, a roller 21 according to FIG. 4 is guided movably by the roller guide 43, and the roller 21 can be moved by means of a lever mechanism 44, consisting at least of a lever 22, A linkage to the roller 21, a joint 26 and a lever bearing 23, both with a centering plate 24 for the cable 45 as well as via the lever bearing 23 in the lever 22 and via a connecting plate with the second knife block 13. If the knife slides 10, 12 are now closed, the lever 22 is displaced vertically by the second knife block 13, and the roller 21 is moved in the slider curve 20 as far as an upper stop. The centering plate 24 is guided via the joint 26 in the direction of the center axis 19 for supporting and centering the line during the stripping and separation process. During opening, the process proceeds in the opposite direction back to the starting position of the roller 21.

In a further exemplary embodiment of the invention in which the crankshaft 5 is directly driven (not shown) by a programmable electric motor 1 without a traction mechanism 42 and without a gear transmission, the programmable electric motor 1 and the crankshaft 5 are arranged in one plane.

The cable 45 to be processed is held on the side 1 along the central axis 19 preferably by a line-guiding nozzle of a line conveyor and on the side 2 by a gripper (not shown). In a first operating step, the knife blocks 11, 13 are moved into a first position, in which the cutting of the line takes place through the pair of cutting knives. After at least partial opening of the knife blocks, the positioning of the conductor in the programmed stripping position by means of the line guide nozzle takes place in cooperation with the line conveyor on the side 1 and by the gripper on the side 2. During the second closing process, the knife blocks 11, 13 of the programmable electric motor 1 are exactly closed so far that the two stripping knife pairs 14, 15 cut the cable jacket, But do not hurt. By the subsequent withdrawal of the lines, the respective end of the jacket is withdrawn from the cable harness, due to the resistance of the still-closed stripping knives 14, 15, and disposed of in a container provided for this purpose.

[0029] The separation and stripping can be carried out in one operation.

[0030] Within the scope of the invention, the programmable electric motor 1 and / or the crankshaft is arranged below the central axis 19 of the cable 45.

The first toothed disk 3 and the second toothed disk 4 can also be arranged horizontally to one another, ie, a programmable electric motor 1 and crankshaft 5 in one plane.

It is also within the scope of the invention to make the eccentric disks of the eccentrics 6, 7 unequal when, for example, technological differences in the speed of movement are required. However, such changes require a higher technological effort and thus make the separation and stripping device according to the invention more expensive. It is also within the scope of the invention to arrange the first connecting rod 8 between the toothed disk 4 and the second connecting rod 9 on the crankshaft. However, such a solution would be associated with a somewhat higher material expenditure and was therefore not shown as a further exemplary embodiment.

Optionally, a lifting device 41 can be provided in the housing 40, by means of which a protective covering hood (not shown) for the separating and stripping device according to the invention or for the entire crimping center can be actuated. (Figure 5).

The following reference list is an integral part of the disclosure.

Reference numeral 1 Programmable electric motor 2 Toothed belt 3 First toothed disc, drive side 4 Second toothed disc,Crankshaft 5 Crankshaft 6 First eccentric on crankshaft 7 Second eccentric on crankshaft 8 First connecting rod for first knife carriage 9 Second connecting rod for second knife carriage 10 First knife carriage 11 First knife block 12 Second knife carriage 13 Second knife block 14 Pair of stripping tools Page 1 15 Pair of stripping blades Page 2 16 Separator pair 17 Poor- Pair 18 Linear guide rail 19 Middle axle cable 20 Gate cam 21 Roller 22 Lever 23 Lever bearing 24 Centering plate 25 Guide plate 26 Joint 27 Front side wall 28 Holding plate 29 Recession 30 First end area Connecting rod 8 31 Recess 32 First end area Connecting rod 9 33 Second end area Connecting rod 8 34 Stage 35 First axial fastening Con rod 8 36 Second end area Conrod 9 37 Second axial mounting Conrod 9 38 Maximum position 39 Minimum position 40 Basic housing41 Lifting device 42 Drawbar gear 43 Roller guide 44 Lifting gear 45 Cable

Claims

claims

(Canceled) 11. A separating and stripping device for a cable processing machine, comprising at least one common drive for two knife blocks (11, 13) which can be moved counter to one another with at least one stripping knife pair (14, 15) and a pair of cutters (16), the first knife of the stripping knife pair (14, 15) and the second knife of the pair of cutters (16) are arranged in the second knife block (13), and wherein a cutting blade (12) to be separated is arranged in the first knife block pair (16) in the first knife block (11) (18) is held by means of a line conveyor and a gripper between the first and second knives of the stripping knife pair (14, 15) and the pair of cutters (16) by means of a line conveyor and a gripper, and the drive drives the knife blocks (11,13) is moved towards the cable (45) to be separated, characterized in that the drive is a programmable electric motor (1) which is connected to a crankshaft (5), and that a first eccentric ( (7) with a second connecting rod (9) for simultaneous lowering and raising of the second knife block (13) is provided with a first connecting rod (8) for raising and lowering the first knife block (11) and also on the crankshaft (5) ).Which is connected to a crankshaft (5), and in that a first eccentric (6) with a first connecting rod (8) for raising and lowering the first knife block (11) and also on the crankshaft (5) is arranged on the crankshaft (5) Second eccentric (7) are arranged with a second connecting rod (9) for simultaneously lowering and raising the second knife block (13).Which is connected to a crankshaft (5), and in that a first eccentric (6) with a first connecting rod (8) for raising and lowering the first knife block (11) and also on the crankshaft (5) is arranged on the crankshaft (5) Second eccentric (7) are arranged with a second connecting rod (9) for simultaneously lowering and raising the second knife block (13).
2. The isolating and stripping device according to claim 1, characterized in that the programmable electric motor (1) is a servomotor or a stepping motor.
3. Disconnecting and stripping device according to claim 2, characterized in that the programmable electric motor (1) is connected to the crankshaft (5) via a positive-locking traction mechanism (42).
4. Disconnecting and stripping device according to claim 2, characterized in that the programmable electric motor (1) is connected to the crankshaft (5) by means of a gear transmission.
5. The separating and stripping device according to claim 1, wherein at least one roller (21) is arranged in the roller guide (43) on a base housing (40), with at least one roller guide (43) 43) is movably guided, and wherein the roller (21) is connected to the second knife block (13) as well as to a centering plate (24) by means of a lever mechanism (44).
6. The separating and stripping device as claimed in claim 5, characterized in that the knife blocks (11, 13) mounted on knife slides (10, 12) move along at least one linear guide rail (18) during simultaneous lifting and lowering, and (24) for supporting and centering the cable (45) during the stripping and separation process. (DE). WIPO Home services World Intellectual Property Organization ,