EP3959022A1 - Umformverfahren und umformvorrichtung - Google Patents
Umformverfahren und umformvorrichtungInfo
- Publication number
- EP3959022A1 EP3959022A1 EP19720560.2A EP19720560A EP3959022A1 EP 3959022 A1 EP3959022 A1 EP 3959022A1 EP 19720560 A EP19720560 A EP 19720560A EP 3959022 A1 EP3959022 A1 EP 3959022A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- die
- forming device
- holding means
- designed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
- B21C1/24—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles by means of mandrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/27—Carriages; Drives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/27—Carriages; Drives
- B21C1/28—Carriages; Connections of grippers thereto; Grippers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/32—Feeding or discharging the material or mandrels
Definitions
- the present invention relates to a Umformverfah according to Ren
- Claim 1 and a forming device according to Claim 6.
- Drawing processes are known from the prior art which are used to reshape a tube or a rod.
- the tube or rod is drawn through an opening of a drawing die.
- a circumference of the opening is smaller than an outer circumference of the tube or the rod.
- the tube or rod is thus reshaped. In this way, the outer circumference of the tube or the rod is reduced.
- This method can also reduce the wall thickness of the pipe.
- the present invention has the task
- a tube is inserted into an opening in a die.
- the opening has at least one area with a smaller circumference than an outer circumference of the tube.
- the die is then moved.
- the pipe is hollow on the inside or an internal tool is arranged in the area of the die, which tool is removed from the pipe after the movement has ended.
- the die can be moved over the entire pipe.
- the entire pipe it is also possible for the entire pipe to be hollow on the inside.
- an internal tool is understood to mean an object that is used for forming purposes during the
- Implementation of the forming process is arranged in the tube and then removed from the tube.
- the interior tool can
- the forming processes occurring on and in the pipe are similar to the forming processes that occur in conventional drawing processes.
- the die is moved. Therefore, the method can be carried out by a device that is slightly longer than the pipe to be formed.
- the length of the device is more than twice the length of the pipe, since there must be space for the pipe both in front of and behind the die.
- Another advantage is that the same tools can be used to insert and remove the pipe from the device. In the prior art, there must be either insert tools and remove tools on each side of the die. Alternatively, the tools can also be moved from one side to the other.
- the internal tool can be designed as a rod or a plug. It can be a flying stopper or a stopper with a stopper rod.
- the tube can be held during the movement at an end that has not yet passed through the die.
- the held end can be moved during the movement of the die in the same direction in which the die is also moved. In this way, the part of the pipe that has not yet been deformed is kept under tension, as a result of which the force to be exerted by the die for deforming the pipe is reduced.
- practical tests have shown that a particularly uniform wall thickness of the pipe can be achieved in this way.
- the held end can be moved with a controlled force.
- the regulated force can be a regulated torque.
- the forming device comprises a drive, a die and an internal tool.
- the die has an opening through which a tube h can be passed while the
- the internal tool is designed as a rod, the internal tool can also be arranged in the complete tube.
- the opening has at least one area with a smaller circumference than an outer circumference of the tube.
- the die can be driven by the drive. As already mentioned above, the advantage of such a forming device is the saving of space.
- the pipe can be inserted into the
- the inner tool can be designed as a rod or plug.
- Forming device comprise a holding means which is designed to hold the tube.
- the die can be designed to be moved by the drive from a first end of the tube to a second end of the tube.
- the holding means can be designed to hold the tube at the second end while the die is moved from the first end to the second end.
- the holding means can be designed to be inserted into the pipe and, in the inserted state in the pipe, to grip the pipe and insert it into the opening.
- the holding means can, for example, as
- the holding means can be designed to form a non-positive connection with the pipe when it is inserted in the pipe.
- the non-positive connection can be so stable that it remains in place when the die is moved with the tube passed through the die.
- the tube can move during the movement of the die using the holding means can be .
- the holding means can be used to keep the undeformed end of the tube under tension during the forming process.
- the holding means can be designed to be moved away from the first end during the movement of the die. So the pipe can during the
- Deformation can be kept on tension, which reduces the force that has to be exerted by the die to deform the tube.
- practical tests have shown that a particularly uniform wall thickness of the pipe can be achieved in this way.
- Forming device comprise a force regulating means which regulates a force exerted on the holding means.
- the regulated force can also be designed as a regulated torque.
- the force control means can be
- the drive can be designed to drive the holding means. Both the die and the holding means are then driven by the same drive
- Forming device comprise a holding means drive which is designed to move the holding means. This is particularly advantageous since the force available to drive the holding means is independent of the force transmitted to the die.
- an angle at which the tube can be inserted into the opening can be adjustable. This angle can also be referred to as the inlet angle.
- the orientation of the die can be adjustable.
- the orientation of the die can be adjusted relative to a geometric axis along which
- the eccentricity can be reduced, for example, by using a measuring device for measuring the eccentricity in order to measure the eccentricity of the pipe before forming.
- the measurement result can be used to change the inlet angle and thus reduce the eccentricity.
- FIG. 1 shows a schematic plan view of a device according to an embodiment of the invention, in which the pipe is not held under tension;
- FIG. 2 shows a schematic plan view of a device according to an embodiment of the invention, in which the pipe is held under tension
- FIG. 3 shows a schematic plan view of a device according to an embodiment of the invention with guidance of the die on both sides and force means in the middle.
- the forming device in FIG. 1 comprises a guide 100, a
- Die 101 a drive 102 and a support means 103.
- the die 101 can be moved by the drive 102. During this movement, it is guided by the guide 100.
- a tube 104 protrudes through an opening in the die 101. The circumference of the opening is smaller than the outer circumference of the tube 104, at least in a partial area. The tube 104 is inserted at one end through the
- Support means 103 held.
- the die 101 is moved from the end of the tube 104 held by the support means 103 in the direction of the loose end of the tube 104. Due to the smaller circumference of the opening, the tube 104 is deformed. If the die 101 was moved completely over the pipe 104, the complete pipe 104 was reshaped.
- Inner tooling such as a plug or a rod can be arranged to an inner diameter of the pipe
- Support means 103 holding opposite end of the tube 104.
- the holding means 200 with the end of the tube 104 held therein can be moved in the same direction as the die 101, so that the tube 104 is kept under tension in the area not yet deformed, whereby the
- Holding means 200 preferably takes place via a torque control, as a result of which a force exerted particularly uniformly on the pipe 104 can be achieved.
- the holding means 200 can preferably be designed as internal collets.
- the die 101 is not guided by a guide on one side, but by a guide 300 on both sides. This increases the stability of the device.
- the die 101 can be moved by a force means.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2019/060803 WO2020216455A1 (de) | 2019-04-26 | 2019-04-26 | Umformverfahren und umformvorrichtung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3959022A1 true EP3959022A1 (de) | 2022-03-02 |
Family
ID=66334472
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19720560.2A Withdrawn EP3959022A1 (de) | 2019-04-26 | 2019-04-26 | Umformverfahren und umformvorrichtung |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3959022A1 (de) |
WO (1) | WO2020216455A1 (de) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH170512A (de) * | 1933-04-13 | 1934-07-15 | Singer Fritz | Verfahren und Vorrichtung zum Strecken von vollen und hohlen Metallwerkstücken. |
US2927372A (en) * | 1955-05-31 | 1960-03-08 | Eastwood Acceptance Corp | Method for forming close tolerance tubing and articles thereon |
JPS589712A (ja) * | 1981-07-08 | 1983-01-20 | Toshiba Corp | 管体の成形方法 |
JPH01202312A (ja) * | 1988-02-05 | 1989-08-15 | Sumitomo Metal Ind Ltd | 金属管の抽伸方法 |
DE19637686C1 (de) * | 1996-09-06 | 1998-01-29 | Mannesmann Ag | Vorrichtung und Arbeitsverfahren zum Einfädeln von Rohren oder Stangen in ein Ziehaggregat |
-
2019
- 2019-04-26 EP EP19720560.2A patent/EP3959022A1/de not_active Withdrawn
- 2019-04-26 WO PCT/EP2019/060803 patent/WO2020216455A1/de unknown
Also Published As
Publication number | Publication date |
---|---|
WO2020216455A1 (de) | 2020-10-29 |
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18D | Application deemed to be withdrawn |
Effective date: 20230418 |