CS271155B1 - Rewinder especially for tungsten wire - Google Patents

Abstract

The device is used for the re-winding of wolfram as well as some other wires from the wire bundle onto a fixed reeler (17), placed above it, by means of a rotary die (6) aimed at then processing them mechanically. The reeler (17) rests on a vertical pin (14). The axial motion of the pin (14) is governed by a cam (10), connected via the wheeled (9, 11) shaft (12) of a gear assembly. The reeler (17) is pressed to the cam (10) by a compression spring (15). The drive gear (9) is connected with the driven wheel (4) from below, fitted with a carrier (5) with a die (6) and a stretching brake (7) and flexible pushers (8). The wheel (4) is driven by a driving unit (2). Under the reeler (17) on an adjustable frame (21) in parallel with the axis pivoted, there is a drum (20) for a bundle of wire (24).<IMAGE>

Description

SEHNAL PAVEL ing., PRAGUE (54)

Rewinder, especially tungsten wire

The device serves for winding tungsten and other wires from a bundle onto a fixed coil (17) placed by means of a rotating die (6) for the purpose of further machine processing. The coil (17) is mounted on the vertical pin (14). Axial movement of the pin (14) is provided by a cam (10) connected via a shaft (12) to the gear wheels (9, 11). The coil (17) is pressed against the cam (10) by a compression spring (15). The gear (9) is coupled to a driven wheel (4), a bottom support (5) with a die (6) and a tensioning brake (7) and spring pushers (8). The driven wheel (4) is driven by the drive unit (2). Underneath the spool (17), a wire bundle drum (20) is rotatably mounted coaxially on the adjustable bracket (21).

ΐθ ςςπ

CN (Л ω

CS 271 155 81

BACKGROUND OF THE INVENTION The present invention relates to a rewinder, in particular a tungsten wire from a bundle to a fixed spool positioned above it by means of a rotating die.

Tungsten wire is supplied mainly in bundles, which need to be rewound on the reel before further processing. Previously, wire winders have been constructed in such a way that the wire from the bundle on the rotating supply coil passed through the deflection rollers and the leather-lined tensioning brake on the winding reel, driven by an electric motor, which performed an alternating axial movement. The axes of the stock and take-up reels were often rotated 90 ° to each other.

In the described rewinder construction, disadvantageous wire shape changes occur during transitions from the curvature given by the diameter of the original bundle to the straight part between the deflection rollers and further to the curvature given by the diameter of the winding reel. If the positions of the supply and take-up reel axes differ from one another, the wire is also twisted. These shape changes adversely affect the physical properties of the wire and cause difficulties in further processing (e.g., electrode entanglement). Since the tungsten wire exhibits a relatively large shape inertia, the loosening of the bundle wires results in its partial unfolding on the supply reel, which results in the individual coils of the wire falling from the reels during rewinding or the wire on the supply reel tangling.

These disadvantages are overcome by the rewinder of the invention. Its essence is that the bobbin is mounted from below and secured over the washer by a nut on a vertical, only vertically movable pin, passing through the central hole of the driven wheel. This is provided on the bottom outside the coil periphery with a support with a die and a tensioning brake, and on the other hand with tilting resilient pushers, the active part of which is in contact with the coil winding surface. A wire bundle drum is rotatably mounted beneath the spool on a vertically adjustable and insulated electrically insulated console attached to the rewinder frame. Furthermore, it is essential that the driven wheel is rigidly coupled to the first coaxial gear of the gear, the second gear of which is connected to the cam by a rotating shaft. This is from above through the bearing in contact with the pin. The spool with the spool is pressed against the cam by a compression spring, which is fixed to the spigot by one end and supported by the other end on the holder.

In the winding machine, in particular of the tungsten wire according to the invention, neither the straightening of the wire nor its transverse twisting occurs during the winding. The wire is practically in its original shape transported by a rotating die from the stock drum to the coil. At the same time, the wall of the drum prevents the wire from unfolding after loosening the binding wires.

The drawing shows, in cross-section, a front view of a particular embodiment of the rewinder.

The drive unit 2 is attached to the winding frame 2 in the present case, an electric meter with an electric speed control and a pinion 2 is used. The driven wheel 6 has a support 2 with a die 6 and a tensioning brake 2 on the bottom outside the circumference of the spool 17, and a pair (only one shown) of elastic buttons 2 holding the tungsten wire 24 on the spool 17 and facilitating removal of the spool 17 can be hinged. A coaxial first toothed wheel 6 is fixedly connected to the driven wheel 4 (pulley), providing a gear drive of the cam ID 1 via a gear transmission. Claimed driven gear 2 ^and the first gear 2 js rollably mounted in the frame 2 · torque from the first gear 2 is transferred to the cam ID using the second toothed wheel 11 associated with the cam 10 the shaft 12 that rollably mounted in the frame 2 · ⁱⁿ the case a front cam 10 is provided which acts through the bearing 13 from above on the vertical pin 14 and induces its axial (vertical) movement. A secure spring of the coil 17 against the cam ID is provided by a compression spring 15, one end fixedly attached to the pin 14 and the other end supported on a bracket 16 attached to the frame 2 which prevents the pin 14 from undesirably rotating. it is transferred to a take-up reel 17 which is mounted on the pin 14 from below. Removability of the spool 17 from the pin 14 is made possible by the nut 18.

The tungsten wire bundle 24 is housed in a drum 20 which is fixed in the pin axis 14 below the spool 17 on a vertically adjustable, insulated 25 electrically insulated bracket 21 attached to the frame 2- The drum 20 has the ability to rotate on an axial

CS 271 155 B1 roller bearing (as described). For safety reasons, the mechanical part of the rewinder is provided with a cover 22 and the entire working space is enclosed in a transparent housing 23.

The operator inserts the tungsten wire bundle 24 into the drum 20 and removes the binding wires. The bundle is partially unfolded and thus rests against the wall of the drum 20. The end of the wire 24 at the top or inside of the bundle is introduced through the die and the tensioning brake d ° of the grip in the winding surface of the coil 17. Upon actuation of the drive unit 2, the drawbar 4 with the tensioning brake 2 and the spring pushers 6 rotate, thus winding the wire 24 onto a non-rotating spool 17 which only performs an axial stroke given by cam cam 10, i.e. £. This allows tight winding of the individual windings of the wire 24 closely next to each other. The diameter of the wire bundle 24 and the diameter of the coil 17 do not generally differ too much, but they are not the same. Therefore, any rewinding differences are compensated by the spontaneous rotation of the drum 20.

For very different wire diameters 24, the distance of the drum 20 from the spool 17 must be adjusted so that the free length of the wire 24 between them is about one to two turns, and a cam 10 with a pitch corresponding to the wire diameter of wire 24 is used. /with.

The additions or variants described below are no longer included in the drawing. From a safety point of view, it is advantageous for the electric part of the rewinder to be blocked by a switch which switches to the leak state by closing the cabinet door 23. Likewise, it is advantageous to equip the rewinder with an automatic shut-off of the drive unit. 22. By insulation 25 electrically separated from the frame 8, the second part of the circuit is formed by the frame 8, the pin 14 and the coil 17. The circuit closes the wire 24. When two to three revolutions of the driven wheel 4 are assumed via the coil 17 after the power unit 2 has been switched off, or an electrical delay can be used to ensure that the power unit 2 is only switched off after the time set for it.

For lower winding speeds, it is possible to use a suitable gearbox to reduce the rotational speed of the drive unit 2 or to replace the belt drive described with a cylindrical worm drive and a globoid wheel, with the engine mounted horizontally. If it is expedient to replace the circumferential cam 10 used, a further bevel gear is engaged in the gear. To reduce the frictional torque of the drum 20, it can be mounted instead of a used thrust roller bearing on a magnetic cushion consisting of permanent magnet segments or a segmented gas or liquid bearing.

The rewinder is designed mainly for tungsten wire, but it can also be used for rewinding of wires from other material. It can be used not only when rewinding the wire for the production of tungsten electrodes, but also wherever the next processing of the wire takes place.

SUBJECT OF THE INVENTION

Claims (4)

Rewinder, in particular a tungsten wire from a bundle to a bobbin, characterized in that the bobbin (17) is fitted from below and secured through the washer (19) by a nut (18) on the vertical, only vertically movable and central bore of the driven wheel (4) outside the circumference of the coil (17) provided with a support (5) with a die (6) and a tensioning brake (7), and also with hinged elastic pushers (8) passing through the pin (14), the axis of which is vertically adjustable under the coil (17) , by insulating (25) an electrically insulated console (21) attached to the rewinder frame (1), rotatably mounted a drum (20) for the wire bundle (24). Tungsten wire winder according to claim 1, characterized in that the driven gear (4) is fixed at the top to a coaxial first gear (9) of which the second gear (11) is connected to the cam by a rotary shaft (12). (10), which is above CS 271 155 B1 over the bearing (13) in contact with the pin (14), the pin (14) with the coil (17) being pressed against the cam (10) by a compression spring (15), one end attached to the pin (14) and the other end supported by the bracket (16). 3. Tungsten wire winder according to claim 1, characterized in that the active part of the elastic pushers (8) is in contact with the winding surface of the coil (17). Rewinder of tungsten wire in particular according to claim 1, characterized in that the driven wheel (4) is driven by a drive unit (2) attached to the rewinder frame (1). 1 drawing CS 271 155 Bl ZZZ2