RU2264274C2 - Apparatus for measure cutting of wire and shaping end of cut pieces - Google Patents

Abstract

FIELD: plastic metal working, namely waste free manufacture of contact pins with spherical ends of precious metal wire.

SUBSTANCE: apparatus includes mechanism for feeding and cutting wire having drive head mounted with possibility of rotation in housing and disc cutter with concave hemispheric cutting surface mounted in head with possibility of rotation and translation motion to center of head. Supporting member having calibrated opening and groove for placing cutter with gap no more than 0.1 mm is stationary mounted in drive head. Calibrated opening is arranged along feed direction of wire coaxially relative to it and to rotation axis of drive head. Contour of said groove corresponds to outer surface of cutter.

EFFECT: enhanced accuracy and quality of cutting wire.

2 cl, 2 dwg

Description

The invention relates to the processing of metals by pressure, in particular to devices for dimensional cutting of wire with the formation of the end face, and can find application, for example, in cases where the material is a wire of precious metals.

A device for measuring wire cutting, according to ed. testimonial. USSR No. 1366270, B 21 F 11/00, 1988, containing a feed mechanism and a cutting mechanism with knives. The device allows to obtain blanks of adjustable length. The disadvantage of this device is the complexity of the design and configuration.

A device for dimensional cutting of wire with the formation of the butt according to ed. testimonial. USSR No. 1821274, B 21 F 11/00, 1993, adopted as a prototype, comprising a feed mechanism and a cutting mechanism with circular knives, made in the form of a housing and a drive head with grooves mounted in the housing for rotation, sliders installed in grooves of the drive head with the possibility of synchronous translational movement to the center of the drive head, while the knives are mounted on sliders.

A disadvantage of the known device is the need for knives to have exactly one diameter, which is quite difficult to achieve with regrinding of knives. Another disadvantage is the difficulty in setting the synchronous convergence of the knives.

Failure to fulfill these conditions leads to a decrease in the accuracy and quality of wire cutting.

The task of the invention is to improve the accuracy and quality of cutting wire.

To solve this problem, a device for measuring cutting of wire with the formation of the end face, comprising a feed mechanism and a cutting mechanism for the wire, including a drive head mounted with the possibility of rotation in the housing and a knife mounted on it with the possibility of rotation and translational movement to the center of the drive head, according to the invention fixed support element mounted on the drive head, with a calibrated hole and a groove for accommodating the knife with a gap, while the hole is located along the wire feed and coaxially with it and with the axis of rotation of the drive head, and the groove is made up to the axis of the wire and repeats the outer surface of the knife. The knife is placed in the groove with a gap of not more than 0.1 mm.

The proposed device for dimensional cutting wire with forming the end face is illustrated by drawings.

Figure 1 shows a device, a cross section; figure 2 is a view of I in figure 1.

The device comprises a feed mechanism and a wire cutting mechanism.

The wire cutting mechanism comprises a base 1, a housing 2, located on the base 1, a drive head 3 mounted in the housing 2 for rotation in bearings 4, a slider 5 with a beveled outer surface, mounted in the groove of the drive head with the possibility of translational movement to the center of the drive head , a spring 6, which interacts with the slider 5, diverting it from the center of the drive head, a circular knife 7, the cutting edge of which is made in the form of a concave hemisphere, mounted on the slider 5 with the possibility of rotation on about and 8, a support element 9, fixedly mounted on the head 3, with a calibrated hole "A" and a groove "B", while the hole "A" is placed along the wire feed coaxially with it and with the axis of rotation of the drive head 3, and the groove " In "serves to place in it with a gap" in "no more than 0.1 mm of the knife 7, and is made up to the axis of the wire, and repeats the outer surface of the knife. The device also contains a nut 10 with a handle 11 mounted on the housing 2 by means of a threaded connection and interacting through the bearing 12 on the bevel of the rotating slide 5, the stop 13, which serves to adjust the knife 7.

The wire feed mechanism consists of a calibrating sleeve 14, wire dressing rollers 15, feeding rollers 16 and a receiving sleeve 17. The rotation of the feeding rollers 16 to the desired angle is fixed by a latch (not shown) and is controlled by the scale of the feeding rollers 16.

The device operates as follows.

The wire from the bay enters through the calibrating sleeve 14, dressing rollers 15, feed rollers 16, receiving sleeve 17, into the calibrated hole "A". Then the drive of the head 3 is turned on, which causes it to rotate around the axis of the wire. The nut 10, rotated by the handle 11, moves downward with the bearing 12. In this case, the bearing 12 interacts with the bevel of the rotating slide 5, moving it together with the circular knife 7 to the center of the head 3. The circular knife 7, making contact with the wire, pushes it and at the same time forms a spherical end. The presence of a calibrated hole "A" and a minimum, not more than 0.1 mm, gap between the knife 7 and the groove "B", repeating its outer surface, made up to the axis of rotation of the wire, eliminates the formation of burrs around the formed spherical end of the wire and the need for subsequent deburring by stripping.

Thus, the use of the invention will allow for waste-free and high-quality manufacturing of parts such as contact pins made of precious metal in small-scale production without the use of complex machines.

Claims (2)

1. Device for dimensional cutting of wire with forming the end face, comprising a feed mechanism and a wire cutting mechanism, including a drive head mounted with the possibility of rotation in the housing and a circular knife with a concave hemispherical cutting surface mounted on it with the possibility of rotation and translational movement to the center of the drive head characterized in that it is equipped with a support element mounted motionlessly on the drive head with a calibrated hole and a groove for accommodating the knife with a gap, wherein This is located along the wire feed line with it and with the axis of rotation of the drive head, and the groove is made up to the axis of the wire and repeats the outer surface of the knife. 2. The device according to claim 1, characterized in that the gap is not more than 0.1 mm

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