Drawing die arrangement and material guide to the arrangement, ahead of a drawing die arrangement, as well as drawing method(s)

Abstract

The invention relates to a drawing die arrangement having a drawing tool that acts on an elongated workpiece, and having a drawing tool support on which the drawing tool is mounted, counteracting the drawing tool, in which support a measurement device that measures the mass distribution of the workpiece material is disposed on the drawing tool, wherein a coupling medium circulated between the measurement device and the drawing tool is provided. Furthermore, the invention relates to a workpiece guide and to a drawing system.

Claims

1. Workpiece guide for placement ahead of a drawing die arrangement, wherein the workpiece guide comprises: a workpiece contact surface, a rack separate from the drawing die arrangement or from a drawing machine, the rack being self-supporting, a displacement device for the workpiece contact surface disposed on the rack, the displacement device comprising an accommodation and comprising first and second linear guides for the workpiece contact surface, the first linear guide extending in a shape of an arc in a vertical direction, the second linear guide extending in a shape of an arc on the accommodation and in a horizontal direction, the accommodation being in a form of a table, the displacement device being movable within the rack, and a rack positioner for positioning the rack with reference to the drawing die arrangement or the drawing machine, the rack positioner comprising a fixation device and at least a foot and/or an attachment device.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further advantages, goals, and properties of the present invention will be explained using the following description of exemplary embodiments, which are particularly also shown in the attached drawing. The drawing shows:

(2) FIG. 1 a sectional representation of a drawing die arrangement;

(3) FIG. 2 an enlarged representation of a detail of FIG. 1, which particularly shows a measurement device of the drawing die arrangement;

(4) FIG. 2A the measurement device according to FIG. 2 in a schematic view from below;

(5) FIG. 3 a three-dimensional representation of the measurement device, in a perspective from which the configuration of the face region of the measurement device is evident in greater detail;

(6) FIG. 4 a top view of the measurement device;

(7) FIG. 5 a three-dimensional representation of a workpiece guide, with the front flap open;

(8) FIG. 6 a front view of the workpiece guide according to FIG. 5;

(9) FIG. 7 a top view of the workpiece guide according to FIGS. 5 and 6;

(10) FIG. 8 a top view of a drawing system;

(11) FIG. 9 a side view of the drawing system according to FIG. 8; and

(12) FIG. 10 a three-dimensional representation of the drawing system according to FIGS. 8 and 9.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

(13) The drawing die arrangement 10 shown in FIG. 1 comprises a drawing tool 14, which is provided for acting on an elongated workpiece 12. The drawing die arrangement 10 furthermore comprises a drawing tool support 16 on which the drawing tool 14 is mounted, counteracting the drawing tool 14, in which a measurement device 20 that measures the mass distribution of the workpiece material 18 is disposed on the drawing tool 14. The drawing tool support 16 is configured in multiple parts and comprises an adapter ring 17A, a drawing ring holder 17B in the form of a spherical cap, and a drawing ring 17 that lies against the drawing tool 14.

(14) A coupling medium 22 that is circulated is provided between the measurement device 20 and the drawing tool 14, whereby a circulation channel 24 for the coupling medium 22 is provided in the drawing tool support 16, so that the coupling medium 22 can be circulated by means of the circulation channel 24 or moved in circulation by means of the circulation channel 24. It is understood that the circulation channel 24 of this exemplary embodiment is connected, in sufficiently known manner, with a pump 75 and with a coupling medium supply 77, by way of incoming and outgoing lines 76.

(15) The measurement device 20 of this exemplary embodiment comprises an ultrasound sensor that is partially accommodated in an accommodation opening 26 provided in the drawing ring 17 of the drawing ring support 16. In other exemplary embodiments, other types of sensors, for example X-ray sensors, can also be used.

(16) The accommodation opening 26 penetrates the drawing tool support 16 radially or in a radial direction, and a seal 28 is disposed between the measurement device 20 and the drawing tool support 16.

(17) It is not shown in FIG. 1 but can be derived from FIG. 2 that a spacer 30, which defines a space 33 for the coupling medium 22, is provided between the measurement device 20 and the drawing tool 14.

(18) The space 33 for the coupling medium 22 is machined out of the measurement device 20, whereby the spacer 30 is formed by a remaining projection 31 of the measurement device 20. Accordingly, in the exemplary embodiment illustrated here, the spacer 30 is configured in one piece with the measurement device 20.

(19) A bracing apparatus 32 for the measurement device 20, which acts in the direction toward the drawing tool 14, is provided on the drawing tool support 16 (see FIG. 2), whereby the bracing apparatus 32 comprises a U-shaped bracing element 57 and three-point bracing unit 58 (see FIG. 3), which has three screw connections, in each instance. The U-shaped bracing element 57 is screwed onto the drawing ring 17 by means of four screws (see FIG. 4).

(20) As can be derived from FIG. 1, the measurement device 20 is particularly directed at a region that lies behind a drawing and wall ironing area of the drawing die arrangement 10, in the drawing direction 35, and is particularly also focused in the direction of this region.

(21) FIG. 1 illustrates the situation for forming a tube 64 by means of drawing, with or without a mandrel, whereby a mandrel is not shown in the figures. The use of a mandrel is particularly advantageous in application cases in which a very uniform wall thickness stands in the foreground.

(22) The forming procedure during tube drawing can be divided into two regions, namely the hollow drawing component and the drawing and wall ironing component, or the hollow drawing area 70 and the drawing and wall ironing area 72 (see FIG. 1). In the hollow drawing area 70, the workpiece 12 is reduced to the desired outside diameter. The drawing and wall ironing area 72 begins starting from the point from which the drawing tool 14 does not demonstrate any further narrowing in the drawing direction 35, and extends in the drawing direction 35 up to the point from which no further forming takes place any longer. The drawing tool 14 has a cylindrical region 36, whereby the drawing and wall ironing area 72 is defined by this region.

(23) The drawing die arrangement 10 furthermore has a cable channel 39 covered by a cover 39A, to bring in a measurement line or a supply line for the measurement device 20 from outside of the drawing die arrangement 10. Likewise, the drawing tool support comprises further channels for coolants, which are known and therefore not numbered, whereby the division of the drawing tool support 16 essentially represents facilitation of production, in this regard.

(24) The workpiece guide 38 shown in FIG. 5, which can be provided for placement ahead of a drawing die arrangement 10 (see FIG. 10), comprises a workpiece contact surface 40 having rolls 62 and guide tubes, rollers, and corresponding roller guides or roller accommodations not illustrated in any detail, a rack 42, a displacement device 44 for the workpiece contact surface 40, disposed on the rack 42, and means 46 for positioning the rack 42 with reference to the drawing die arrangement 10 or a drawing machine 56 (see FIG. 10). The positioning means 46 comprise schematically represented fixation means 50, such as screws, for example, for anchoring in the floor, and four feet 52. The rack 42 is configured in self-supporting manner or is self-supporting. The displacement device 44 comprises a first and a second linear guide 48, whereby each linear guide has two guide rails 49 for the workpiece contact surface 40, in each instance. The first linear guide 48 illustrated in FIG. 6 extends in the shape of an arc, to implement pivoting ability of the workpiece contact surface 40 in the vertical direction. The second linear guide 48 illustrated in FIGS. 5 and 7 extends in the shape of an arc, on an accommodation for the linear guide in the form of a table 59, to implement pivoting ability of the workpiece contact surface 40 in the horizontal direction. A hydraulic cylinder 60 is provided as an actuator for pivoting the workpiece contact surface 40 in the horizontal direction, whereby a hydraulic cylinder, not shown, is also provided for pivoting the workpiece contact surface 40 in the vertical direction. The table 59 is mechanically coupled with the linear guide 48 that can be seen in FIG. 6, to implement pivoting ability of the workpiece contact surface 40 in the vertical direction.

(25) The positioning means 46 comprise four feet 52, and the rack 42 is configured to be self-supporting or is self-supporting.

(26) The drawing system 54 shown in FIGS. 8 to 10 comprises a drawing stand 55 that carries the drawing die arrangement 10, a drawing machine 56, and the workpiece guide 38 disposed ahead of the drawing die arrangement 10 in the drawing direction. In this connection, the drawing machine 56 draws a workpiece through the drawing die arrangement 10 in a guide tube 74 (see FIG. 10).

(27) The drawing machine 56, as a two-carriage drawing machine, is provided with two drawing carriages 66. Alternatively, the drawing machine 56 can also be configured in the form of a caterpillar drawing machine or a drum drawing machine. In the departure region, the drawing machine 56 furthermore has a main gear mechanism 68 for the drive of the two carriages 66.

(28) To implement effective displacement by means of the displacement device 44 of the workpiece guide 38, the latter must be disposed ahead of the drawing die arrangement 10 in such a manner that the center point of the above pivoting directions, about which the workpiece contact surface 40 can be pivoted in the horizontal and the vertical direction, is situated in the region of the drawing tool 14 (see FIG. 1) of the drawing die arrangement 10. However, the workpiece contact surface 40 does not necessarily have to be displaceable on a circular track, or the center point does not necessarily have to be situated in the region of the drawing tool 14, as long as the tolerances allow this.

REFERENCE SYMBOL LIST

(29) 10 drawing die arrangement 12 workpiece 14 drawing tool 16 drawing tool support 17 drawing ring 17A adapter ring 17B drawing ring holder 18 workpiece material 20 measurement device 22 coupling medium 24 circulation channel 26 accommodation opening for the measurement device 28 seal 30 spacer 31 projection 32 bracing apparatus 33 space for coupling medium 35 drawing direction 36 cylindrical region 38 workpiece guide 39 cable channel 39A cover 40 workpiece contact surface 42 rack 44 displacement device 46 means for positioning 48 linear guide 49 guide rail 50 fixation means 52 foot 54 drawing system 55 drawing stand 56 drawing machine 57 bracing element 58 three-point bracing unit 59 table 60 hydraulic cylinder 62 roll 64 tube 66 drawing carriage 68 main gear mechanism 70 hollow drawing area 72 drawing and wall ironing area 74 guide tube 75 pump 76 incoming and outgoing line 77 coupling medium supply