Drawing machine, drawing method and drawing mandrel

Patent metadata

Field	Value
Publication number	US-12472546-B2
Application number	US-202117914138-A
Country	US
Kind code	B2
Filing date	Mar 26, 2021
Priority date	Mar 26, 2020
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

To provide methods, apparatuses and drawing mandrels in which the shaping process can be monitored as closely as possible, a drawing machine and a drawing method manufactures or processes tubes, which extend in the direction of longitudinal extent, from a semi-manufactured product, wherein the drawing machine includes a drawing device for drawing a hollow workpiece formed by the tube and the semi-manufactured product in the direction of longitudinal extent, a drawing ring and a drawing mandrel and acts on the workpiece in a shaping manner via the drawing mandrel and the drawing ring while the workpiece is drawn by the drawing device around the drawing mandrel and through the drawing ring. A sensor is located on the drawing mandrel, or physical properties are measured in the interior of the workpiece and/or on the drawing mandrel using a sensor on the drawing mandrel.

First claim

The invention claimed is:

1 . A drawing machine for the production or machining of tubes composed of a semi-finished product, wherein the tubes extend in a longitudinal expanse direction,
wherein the drawing machine comprises a drawing device for drawing a hollow workpiece formed by the tube and the semi-finished product along the longitudinal expanse direction, a drawing ring, and a drawing mandrel, and
acts on the workpiece with the drawing mandrel and the drawing ring, forming the workpiece, while the workpiece is being drawn around the drawing mandrel and through the drawing ring under the control of the drawing device,
wherein a sensor, a micro-controller, and a memory are arranged on the drawing mandrel and the sensor is configured to cooperate with the micro-controller and the memory and configured to measure a position of the sensor in three-dimensional space,
wherein the drawing machine further comprises an apparatus for transmission of data from an interior of the workpiece using a transmitter arranged in the interior of the workpiece and a receiver arranged outside of the workpiece, and the receiver and the transmitter are configured to communicate wirelessly with one another,
wherein the wireless communication between the transmitter and the receiver is configured inductively.

2 . The drawing machine according to claim 1 , wherein the transmitter is configured to transmit a signal that comprises the data through a wall of the workpiece, and the receiver is arranged at an axial height of the transmitter with reference to the longitudinal expanse direction.

3 . The drawing machine according to claim 1 , wherein the transmitter comprises a transmission coil.

4 . The drawing machine according to claim 1 , wherein the receiver comprises a reception coil that surrounds the workpiece.

5 . The drawing machine according to claim 1 , wherein the apparatus comprises a further receiver and/or a further micro-controller.

6 . The drawing machine according to claim 1 , wherein the sensor has the transmitter and/or the micro-controller and the transmitter is an electric or electronic transmitter.

7 . The drawing machine according to claim 1 , wherein the transmitter is arranged on the drawing mandrel.

8 . The drawing machine according to claim 1 , wherein the sensor comprises a nine-axis position sensor and/or wherein the sensor records the position in space of the sensor in Euler coordinates.

9 . The drawing machine according to claim 1 , wherein the workpiece, after the workpiece has moved past the drawing mandrel or the drawing ring, extends over at least 2 m in the longitudinal expanse direction.

10 . The drawing machine according to claim 1 , wherein the workpiece is metallic.

11 . The drawing machine according to claim 1 , wherein the sensor is configured to measure temperature and/or pressure and/or acceleration.

12 . A drawing method for the production or machining of tubes composed of a semi-finished product, wherein the tubes extend in a longitudinal expanse direction, wherein using a drawing device, a hollow workpiece formed by the tube and the semi-finished product is drawn along the longitudinal expanse direction and the workpiece is acted on with the drawing mandrel and the drawing ring forming the workpiece, while the workpiece is being drawn around the drawing mandrel and through the drawing ring under the control of the drawing device, wherein a sensor, a micro-controller, and a memory are arranged on the drawing mandrel and the sensor cooperates with the micro-controller and the memory, and the sensor measures a position of the sensor in three-dimensional space,
wherein the mandrel further comprises an apparatus for transmission of data from an interior of the workpiece using a transmitter arranged in the interior of the workpiece and a receiver arranged outside of the workpiece, and the receiver and the transmitter are configured to communicate wirelessly with one another, wherein the wireless communication between the transmitter and the receiver is configured inductively.

13 . The drawing method according to claim 12 , wherein the transmitter transmits the signal that comprises the data through a wall of the workpiece and the receiver is arranged at an axial height of the transmitter with reference to the longitudinal expanse direction.

14 . The drawing method according to claim 12 , wherein the data are transmitted by a transmission coil.

15 . The drawing method according to claim 12 , wherein the data are received by a reception coil of the receiver, wherein the reception coil surrounds the tube.

16 . The drawing method according to claim 12 , wherein the receiver amplifies the signal transmitted by the transmitter.

17 . The drawing method according to claim 12 , wherein the data received by the receiver are transmitted to a further receiver and/or processed further by the micro-controller.

18 . The drawing method according to claim 12 , wherein the micro-controller arranged on the drawing mandrel processes the data of the sensor further.

19 . The drawing method according to claim 12 , wherein the semi-finished product is a hollow body that extends in the longitudinal expanse direction.

20 . The method according to claim 12 , wherein the sensor is further configured to measure temperature and/or pressure and/or acceleration.

21 . A drawing mandrel for use in a drawing machine and/or for use in a drawing method for the production or machining of tubes composed of a semi-finished product, wherein the tubes extend in a longitudinal expanse direction, wherein the drawing mandrel is a flying drawing mandrel, wherein a sensor, a micro-controller, and a memory are arranged on the drawing mandrel, and wherein the sensor is configured to cooperate with the micro-controller and the memory and to measure a position of the sensor in three-dimensional space,
wherein the mandrel further comprises an apparatus for transmission of data from an interior of the workpiece using a transmitter arranged in the interior of the workpiece and a receiver arranged outside of the workpiece, and the receiver and the transmitter are configured to communicate wirelessly with one another, wherein the wireless communication between the transmitter and the receiver is configured inductively.

22 . The drawing mandrel according to claim 21 , wherein the sensor is further configured to measure temperature and/or pressure and/or acceleration.

Assignees

• Sms Group Gmbh

Inventors

• Jungen Hardy
• Serode Ulf
• Thoelke Karl

Classifications

• B21C3/16

  Mandrels; Mounting or adjusting same · CPC title

• B21C51/00 Primary

  Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F · CPC title

• B21C1/24 Primary

  by means of mandrels · CPC title