SU828283A1 - Device for squeezing contacts - Google Patents

Description

I

The invention relates to electrical engineering, in particular to devices for crimping contacts, for example, coaxial RF connectors.

A known tool for crimping cable. lugs containing two handles, a die, a punch acting on the last sector-type comb and connecting the handles to the said working bodies, an intermediate link, which is made in the form of a stepped power cylinder, the small shaft of which is connected to the handles, and the rod large porchn - with a sector comb 1.

Pliers for crimping cable lugs and sleeves containing a working tool, a pressure assembly consisting of a movable handle with pivots hinged to the working tool, and a spring-loaded support dog, whose axis is set eccentrically relative to the axis of rotation of the trunnion, are also known.

2

These devices cannot ensure a high-quality connection of the contact with the cable, since they have an odd unregulated punch, and when used as a tool, the connection is skewed, caused by a load on the contact on one side, which is unacceptable when crimping coaxial RF connectors.

In addition, the devices do not provide accurate crimping of the contact, since they do not provide for adjustment of the punch stroke and there is no limit to the amount of crimping. This leads to weak crimping of the connection and poor signal transmission, or to a strong contact area, i.e., breakdown of insulation and short circuit.

The technical essence and the achieved result closest to the invention is a device for contacts, comprising a housing, a universal pressing head with punches, a hydraulic actuator, a device for determining the magnitude of the stroke of the punches, made in the form of a sleeve with a limb mounted on the housing, and an indicator that interacts with sleeve 3.

With such a design, the punches are simultaneously controlled by the same magnitude of the working stroke; therefore, the errors and manufacturing and installation of the punches in the pressing head, as well as their wear during operation, cause the crimping of the contact by the punches to different depths, i.e. to its uneven crimping. This leads to either breakdown of the insulation and the closure of the contact, or breakage of the inner conductor of the cable.

In addition, uneven crimping of the contact relative to the inner conductor of the cable leads to different transient resistance at the crimping points.

The purpose of the invention is to improve the accuracy of the quality of reduction by increasing the accuracy of regulation of each of the punches.

This goal is achieved in that the device for crimping the contacts, comprising a housing, an crimping head with punches and an actuator, is provided with a rotating disk with mounted on its end concentric with respect to the crimping head and cooperating with the punches by pivoting cams and eccentric bushings. In this case, the cams are made with grooves interacting with eccentric bushings.

FIG. 1 shows a device for crimping contacts, a general view; in fig. 2- axial section A-A of the eccentric bushing; in fig. 3 shows a cross section of the contact joint at the place of reduction; in fig. 4 and 5 shows the setup and operation of the device.

The device includes a housing 1 with a crimping head 2 fixed on it, in the grooves 3 of which punches 4 are located with the possibility of reciprocating movement due to springs 5 mounted on thrust shafts 6. Concentricly opressovochno head 2 is fitted with a disk 7 with cams attached to jaw x 8 9, in which grooves 10 are provided for mounting eccentric bushings I. Bushes 11, having turnkey keys for adjustment, are hinged on axles 12 (see Fig. 2) having a threaded portion at the point of their connection with the disk 7, and slits under the screwdriver for fastening or releasing the sleeves 11 during the adjustment process. To prevent the axles 12 from unscrewing, spring washers 13 are installed on them. The disk 7 is loosely mounted on the pressing head 2 between the restricting washers 14 and 15 (see Fig. 4) and connected through an eye 16 to a drive of known construction (not shown), providing a constant amount of rotation of the disk 7.

The device works as follows.

The adjustment of the Poissions 4 is made and they are set to the same magnitude from the axis of the base hole of the pressing head 2. To do this, the disk 7 is turned by the drive by the magnitude of its working stroke, and the gauge 18 is set to the place of the stop 17 (see Fig. 4, 5) Then turn the axis 12, freeing

sleeves 11. By turning the sleeves 11, which cause the cams 9 and the punches 4 associated with them to move, each punch 4 is contacted with a caliber 18. Then the sleeves 11 are fixed with the help of axes 12 and spring-mounted plugs 13 installed between them initial position. Next, in the pressing head 2, in place of the extracted caliber 18, the stop 17 is installed and secured with a nut 19.

The contact 20 prepared for compression with cable 21 (see FIG. 5) is installed in the base opening of the crimping head 2

until it stops 17. Then, using a drive, turn the disc 7 by the amount of the working stroke together with the cams 9 fixed on the disc 7, which, when sliding their curvilinear working surface,

face surface nananson 4 pass them forward movement. As a result, the compression of the contact by 20 punches 4 evenly, to the same depth occurs.

Next, the drive, making a motion opposite to the working stroke, turns the disk 7 with cams 9 and, under the action of the springs 5, the punches 4 return to their original position, releasing the contact connection,

which is removed from the base hole of the crimping head 2.

The next contact prepared for compression together with the cable is inserted into the base hole, and the device operation cycle

repeats.

Claims (3)

1. USSR Authorship Certificate No. 478383, cl. M 01R 43/04, 1972. 2. USSR author's testimony No. 440736, cl. I02G 15/04; H OIR 43/04, 1972. 3. USSR author's certificate No. 526978, cl. H01R 43/04, 19/73 (prototype). K at So 8y 20 3 / J a2.J / 3 nineteen