Device for stripping and crimping contacts in cable harnesses

Abstract

This utility model relates to electrical engineering, specifically to a device for automating the process of stripping and crimping contacts in wire harnesses. The technical result is increased productivity and reduced labor intensity, as well as a reduction in the time required for stripping and crimping contacts.For this purpose, a device for stripping and crimping contacts in cable bundles includes a base, on which a support and a frame with a matrix mounted thereon with knives for stripping wire and crimping knives fixed thereon are fixed, wherein a contact strip is fixed on the support, and an electronic control unit is fixed on the base, to which a pedal is connected, and a pneumatic distributor is installed under it, made with a nipple for connecting an air supply element, wherein the control unit is connected both to a servo drive, which, in turn, is connected to the matrix, and to a pneumatic distributor, which, in turn, is connected to the matrix through pneumatic cylinders, wherein one of the pneumatic cylinders sets in motion a mechanism with knives for stripping, cutting off insulation, and the second of the pneumatic cylinders sets in motion a mechanism with knives for stripping, for removing insulation. 1 ill.

Description

[0001] The utility model relates to electrical engineering, namely to a device for automating the process of stripping and crimping contacts of harnesses.

[0002] A multi-motor electric drive for a machine for cutting and stripping wire is known [Auth. certificate SU No. 1792223, IPC H02P 7 / 62, published 02 / 28 / 1994], which contains, along the movement of the wire being cut, a payoff mechanism, a movement sensor, a wire feed drive, a carriage drive motor equipped with a thermistor, a cutting mechanism, a product accumulator, due to which increased reliability and increased productivity are ensured.

[0003] A disadvantage of this device is the need to readjust it when the wire length changes, which increases the time required for stripping and crimping. The cutting tool's pneumatic drive has low energy conversion efficiency, which, with a high operating frequency, leads to increased compressed air consumption and compressor power consumption, resulting in increased energy consumption and reduced productivity.

[0004] A device for crimping electrical contacts with wires is known [Auth. cv. SU No. 1403172, IPC H01R 43 / 04, published 06 / 15 / 1988], comprising a housing in a groove of which a cradle is mounted with the ability to rotate. A U-shaped groove for accommodating levers and a rectangular groove for accommodating a crimping head with punches are made in the cradle coaxially with the axis of its rotation.

[0005] The disadvantage of this equipment is the high labor intensity of commissioning work and the constant need for manual control by the operator, which leads to increased labor costs, decreased productivity and an increased risk of errors.

[0006] The objective is to create an automated device for stripping and crimping contacts, which will improve the working conditions of machine operators.

[0007] The technical result is an increase in productivity and a decrease in the labor intensity of the process, a reduction in the time required to perform operations on stripping and crimping contacts.

[0008] The technical result is achieved by a device for stripping and crimping contacts in cable harnesses comprising a base with a support (rod) attached to it and a frame with a die mounted on it, with wire stripping knives and crimping knives attached to it. A strip of contacts is attached to the support, and an electronic control unit (ECU) is attached to the base, to which a pedal is connected. A pneumatic distributor with a nozzle for connecting an air supply element is mounted underneath.

[0009] The figure shows photos: on the left - contacts before stripping and crimping on the declared machine, on the right - after stripping and crimping on the declared machine.

[0010] The device includes a base, a support (rod), a frame, a matrix with knives for stripping wires fixed to it, a tape with contacts, an electronic control unit (ECU) to which a pedal is connected, a pneumatic distributor with a fitting for connecting an air supply element.

[0011] The stripping mechanism in the form of wire stripping knives is activated by pressing the pedal, thereby activating the pneumatic distributor, as well as the matrix with knives attached to it, which remove the insulating layer from the contact surfaces of the cable.

[0012] The crimping mechanism in the form of crimping knives, which are fixed on the die, is started by pressing the pedal, thereby activating the servo motor of the machine, which sets the die in motion, which fixes the contacts after stripping and crimps them so that the connection is reliable.

[0013] The ECU control system coordinates the operation of the stripping (wire stripping knives) and crimping mechanisms, which allows the process parameters to be adjusted and adapted to production requirements.

[0014] The clamps located in the die help precisely position the cable harness within the machine's working area. They ensure stable stripping and crimping operations, which is essential for the high quality of the final product.

[0015] Let's look at an example of how the device works.

[0016] Before using a wire stripping and crimping machine (e.g., KNS-PES-AG), open the air supply. Air is supplied via a compressor through a pneumatic hose into the pneumatic distributor block. The device requires an air pressure of at least 4.5-5.0 atmospheres; air supply is only required when stripping wire. Then connect the machine to the power supply.

[0017] Then the contact strip is fed into the die. To do this, loosen the eccentric, which is responsible for pressing and securing the contact strip to the pressure plate. On the machine, the contacts are fed by a strip that runs along the guide channels of the working die.

[0018] The operator sets the operating modes on the machine's operating screen using the liquid crystal display: stripping only, crimping only, or stripping and crimping simultaneously, and sets the crimping speed.

[0019] When selecting the "Crimping" mode, the operator places the cable core to be crimped in the vice within the die's working area. They check that the contact is correctly positioned and tightly adheres to the cable. Pressing the pedal starts the operation, activating the machine's servo drive, which drives the die and the stripping strip. The stripping strip then moves until the contacts it holds reach the crimping knives. The stripping stripping stripping strip is then held directly above the contacts by the crimping knives. The crimping process then begins with the crimping knives.

[0020] When selecting the "Stripping" mode, the operator places the cable core to be stripped in a vice within the die's working area. Operation is initiated by pressing the pedal, thereby activating the pneumatic valve. The stripping mechanism (stripping knives) is driven by three pneumatic cylinders (mounted under the control unit and connected to the pneumatic valve) and operates through the pneumatic valve block under air pressure.

[0021] One pneumatic cylinder drives a clamp in the die, clamping and holding the wire. The second pneumatic cylinder drives a stripping mechanism with knives, cutting the insulation. The third pneumatic cylinder drives a stripping mechanism with knives, removing the insulation.

[0022] When selecting the "simultaneous stripping and crimping" mode, the operator places the cable core to be stripped and the contacts to be crimped in the vice within the die's working area. The operator initiates the process by pressing the pedal, which first activates the pneumatic valve for stripping, then the servo drive for crimping.

[0023] First, the stripping mechanism is driven by three pneumatic cylinders through a pneumatic distributor block under air pressure. One pneumatic cylinder drives a clamp in the die, clamping and holding the wire. The second pneumatic cylinder drives a mechanism with stripping knives, cutting the insulation. The third pneumatic cylinder drives a mechanism with stripping knives, removing the insulation. Next, the strip with contacts moves until the contacts it holds reach the crimping knives. It stops, and the stripped wire is held directly above the contacts by the clamping knives. The crimping process then begins with the crimping knives.

[0024] Due to the fact that the contacts are fixed on the tape and fed automatically, there is no need to hold them, thanks to the automation of the process.

[0025] Due to the fact that the contacts become clean after processing, their reliable connection is ensured.

[0026] Because the contacts are secured to the tape and fed automatically throughout the process, there's no need to hold them. The tape stops automatically, and the cleaning and crimping knives operate automatically and precisely. Automation of the process improves the accuracy and quality of contact processing by reducing errors, increasing productivity, reducing labor intensity, and reducing the time required for stripping and crimping.

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