EP0072476B1 - Verfahren und Einrichtung zur Materialzuführung an Warm- und Halbwarm-Umformmaschinen - Google Patents

Verfahren und Einrichtung zur Materialzuführung an Warm- und Halbwarm-Umformmaschinen Download PDF

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Publication number
EP0072476B1
EP0072476B1 EP82106884A EP82106884A EP0072476B1 EP 0072476 B1 EP0072476 B1 EP 0072476B1 EP 82106884 A EP82106884 A EP 82106884A EP 82106884 A EP82106884 A EP 82106884A EP 0072476 B1 EP0072476 B1 EP 0072476B1
Authority
EP
European Patent Office
Prior art keywords
wire
advance
rollers
hot
feed
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.)
Expired
Application number
EP82106884A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0072476A2 (de
EP0072476A3 (en
Inventor
Roger Criblez
Raymond Schoenenberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hatebur Umformmaschinen AG
Original Assignee
Hatebur Umformmaschinen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hatebur Umformmaschinen AG filed Critical Hatebur Umformmaschinen AG
Priority to AT82106884T priority Critical patent/ATE22538T1/de
Publication of EP0072476A2 publication Critical patent/EP0072476A2/de
Publication of EP0072476A3 publication Critical patent/EP0072476A3/de
Application granted granted Critical
Publication of EP0072476B1 publication Critical patent/EP0072476B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K27/00—Handling devices, e.g. for feeding, aligning, discharging, Cutting-off means; Arrangement thereof
    • B21K27/02—Feeding devices for rods, wire, or strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F23/00—Feeding wire in wire-working machines or apparatus

Definitions

  • the invention relates, according to the preamble of claim 1, to a method for supplying material to hot and semi-hot forming machines in non-cutting metal forming, a material in wire ring form being straightened in a straightening apparatus and by means of at least one feed device, which comprises at least one pair of feed rollers, against a stop intermittently advanced, heated, divided into individual lengths and fed to the hot-forming machine.
  • rod-shaped material In conventional hot-forming machines, rod-shaped material is fed, and during this feeding process, it passes through a heater, where it is heated to a temperature just below the melting temperature. Subsequently, it is gripped by a drawing-in device of the forming machine and this now intermittently guides the material, matched to the speed of the machine, into a shearing device, which produces sections of the same length, which are then further processed in the machine. H. be reshaped. It is obvious that one tries to reach the highest possible temperature of the material to be formed, so that the forming work can be kept as small as possible. This in turn means that the heated starting material cannot be subjected to any major loads, in particular tensile loads, since no plastic deformations of the material are desired.
  • the contact pressure of the feed rollers of a cold feed device is much higher (for example several tons).
  • the known cold drawing-in devices cannot therefore be used for warm drawing in, since the deformation of the warm bar material requires far less force than the frictional sliding of the rollers on the bar surface. The rod would therefore bend shortly after hitting the stop.
  • the known warm drawing-in device which works with a considerably lower pressing force, would in no way be suitable for the warm drawing-in of wire ring-shaped material.
  • the known warm pull-in cannot apply the pulling force required to pull off the wire and pass it through the straightening apparatus. A corresponding increase in the contact or tensile force would in turn bring about a deformation of the heated wire.
  • DE-A-24 50 422 shows a machine that works from a wire ring and is used for hot forming.
  • the wire is pulled off the ring via a driving element and pushed through a first straightening device which straightens the wire in such a way that it forms a loop.
  • a sensor is built into this loop, which gives the drive element, which in and of itself runs uniformly, commands to run slower or faster.
  • the wire is straightened in a second straightener and drawn through a heater.
  • This pulling which is carried out by the second straightening apparatus and by the heating, is brought about by the pull-in rollers attached to the forming machine behind the heating, and this pulling-in takes place intermittently in the work cycle of the machine.
  • this process means that the wire, which has been heated to a certain temperature, has to withstand a tensile stress due to the resistance that the second straightening device exerts on the wire, and also due to the great acceleration of the wire material to be moved, since the pulling-in process is only one is a small time span of a turning cycle of the forming machine. It follows that the wire had to have a certain tensile strength even when heated.
  • the wire must be absolutely straight before it is introduced into the heater, and it should be pushed intermittently into the shearing device during processing in the forming machine, in the work cycle of the machine.
  • a shaft 2 is rotatably mounted in the machine body 1 of a hot-forming machine. This shaft 2 is by a mechanism, not shown, but known at the same speed as the crankshaft, i. H. the main drive of the machine, driven. The shaft 2 is also the carrier of the ejector curves, not shown, which control the die-side ejector of the machine.
  • a first control cam 3 displaces an angle lever 5, which is attached to an axle 4, which is mounted in the machine body 1, the roller 5a of which rolls on the control cam 3, and which is constantly pressed against the control cam 3 by a spring 32 (FIG. 2) and thereby the roller .5a is in constant contact with the control cam 3, in a rocking motion.
  • the other end of the angle lever 5 is articulated to a two-link coupling 6 which is articulated to an adjusting lever 7.
  • This adjusting lever 7 is mounted on an axis 8, which is rotatably mounted in a support 9, which is firmly connected to the machine body 1.
  • the adjusting lever is also rigidly connected to a two-leg angle lever 10, which also has its fulcrum in axis 8.
  • the adjusting lever 7 consists of two tabs 11 and 12, which are connected by a web 13.
  • the two tabs 11 and 12 form a groove delimited on both sides by guideways, in which a joint block 14, which forms the articulated connection between the coupling 6 and the adjusting lever 7, can be displaced by a spindle 15 and locked in any position.
  • the two-leg angle lever 10 transmits its rocking movement on the one hand to a coupling rod 16, which drives the feed rollers 17 (warm feed) of the machine 1 via a gear transmission with backstops, and on the other hand to a transmission rod 18, which serves as a drive element for a cold feed device 19.
  • the angle lever 5 can also have three legs and can be used as an ejector drive for a die.
  • a second control cam 20, which is referred to below as a release curve (visible in FIG. 3) and is arranged behind the control cam 3 on the shaft 2, sets an angle lever 21 in a rocking motion, which is via a rod 22 (FIG. 4) of the cold feed device 19 is transmitted.
  • a known wire run-off and feed device 23 is arranged behind the cold feed device 19. On its mandrel 24, the position of the wire ring 25 is indicated schematically.
  • a known straightening apparatus 26 with three lower, fixed straightening rollers 27 and two upper, vertically adjustable straightening rollers 28 is fastened to the wire run-off and feeding device 23.
  • the wire 29 is thus withdrawn from the wire drain device 23, passes through the straightening device 26, is guided through the four feed rollers 30 of the cold feed device 19, passes through a known heating device 31 shown schematically, is taken over by the feed rollers 17 of the machine 1 and fed to the shearing device.
  • the intake stroke of the warm intake and the cold feed device 19 can be adjusted simultaneously.
  • a spindle 15 By turning a spindle 15, one moves the joint block 14, which forms the point of articulation between the coupling 6 and the adjusting lever 7; thereby the lever arm a is lengthened or shortened, d. H. the angular movement of the adjustment lever is changed.
  • This adjustment distance b can be equipped with a scale, whereupon z. B. the feed stroke can be read in mm, and setting is easier.
  • the rocking movement, which is fed to the cold feed device 19 via the transmission rod 18, is taken over by a two-link deflection lever 33 (FIG. 4).
  • This deflection lever 33 is fastened on a shaft 34 which is rotatably mounted in the housing 35 of the cold feed device 19.
  • the rocking movement of the deflection lever 33 is transmitted to a seesaw arm 38 via a rod 36, which is connected in an articulated manner to the bearing 37 with the deflection lever 33, the connection between the rod 36 and the seesaw arm 38 being designed as a joint 39.
  • This rocker arm 38 is made in one piece with a driver yoke 98, which is mounted in a rotationally rigid manner on a shaft 40, which in a zy Linder-shaped sleeve 41 is mounted by means of roller bearings 50 (Fig. 5). At the other end of the shaft 40, one of the four feed rollers 30 is attached in a rotationally rigid manner.
  • the rocking movement of the rocker arm 38 is transmitted via a lever mechanism with rods 42, 43, 44 and driving yokes 98, 99, 100, 101 to the shafts 45, 46, 47, which are mounted in the same way as the previously described shaft 40.
  • the ends of the shafts 45, 46, 47 are also each attached to a feed roller 30 so that they cannot rotate. As a result, all feed rollers 30 experience exactly the same rocking movement, upper and lower in the opposite direction.
  • the ventilation curve 20 is rotatably mounted on the shaft 2. It is clamped by four screws 51, 52, 53, 54 against a flange fixed to the shaft 2 in a rotationally rigid manner.
  • the release curve 20 has four concentrically arranged, ie. H. on a common circular arc slots 55 which allow that after loosening the screws 51, 52, 53, 54 the ventilation curve 20 can be adjusted within a certain angular range and tightened again.
  • the release curve 20 sets an angled lever 21, which is attached to an axis 56 and which is also mounted on the support 9 and is firmly connected to the machine body 1, in a rocking motion. This rocking movement is fed to the cold feed device 19 via the rod 22.
  • the two upper feed rollers 30b of the cold feed device 19 are thereby lifted upward from the wire towards the end of the material stroke without the drive being impaired thereby.
  • four stilts 59 are embedded in the support 9, which have a common flange 60 at the other end, on which a spring plate 61 is pressed by the compression spring 62.
  • the other end of the compression spring 62 is closed off by a flange 63 which is fitted within the four stilts 59 and which presses on an annular flange 64 which is fixedly connected to the rod 22.
  • a flange 63 which is fitted within the four stilts 59 and which presses on an annular flange 64 which is fixedly connected to the rod 22.
  • the movement of the drive mechanism described is transmitted via the rod 22 of the cold feed device 19.
  • the rod 22 is connected in an articulated manner to a deflection lever 65 (FIG. 4), which in turn is connected to the actual release lever 67 via an articulated rod 66.
  • the described drive mechanism of the cold feed device 19 gives the feed rollers 30a, 30b, as can be seen in FIG. 4, a rotational movement in both directions of rotation with each stroke of the rod 36, whereby only the rotation in one direction can be used to advance the wire. During the opposite rotation, all feed rollers 30a, 30b must be lifted off the wire, otherwise the same would be moved back again.
  • the upper feed rollers 30b are lifted off during the return rotation.
  • an angled lever 92 (FIG. 1) is screwed to one of the two bearing sleeves 72, the limb 93 of which between the two lower feed rollers 30a under the wire to be drawn in comes to rest.
  • This angled lever 92 is raised with the upper feed rollers 30b during the lifting process and thereby lifts the wire from the lower feed rollers 30a by a certain amount. This prevents the wire from getting caught in the lower feed rollers 30a when the feed rollers 30 are turned back and is thus moved back again.
  • the release lever 67 (FIG. 5) is composed of a cylindrical tube 68, which is rotatably mounted on an axis 69, which in turn is fastened in the housing 35. On the side facing away from the feed rollers 30 is on. Tube 68 attached a tab 70 which is hinged at its end to the rod 66. On the tube side opposite the tab 70, two lugs 71 are attached which actuate the release mechanism.
  • the sleeves 72 and 73 in which the drive shafts 46, 47 for the upper feed rollers 30b are roller-mounted, are not fixed in the cold feed housing 35 like the bearing sleeves for the lower feed rollers 30a, but they have a joint 74 at the rear end, which allows that sleeves 72 and 73 (FIG.
  • a web 76 is attached to each of the front ends of the sleeves 72 and 73.
  • An H-shaped tab 77 is articulated to this web 76, the other end of which is connected in an articulated manner to a rod 79 guided in the spring sleeve 78.
  • This rod 79 is provided with a flange 80 which serves on the one hand as a bearing surface for a spring assembly 81 and on the other hand as the lower end position of the upper feed roller 30b.
  • the spring assembly 81 is responsible for the contact pressure of the upper feed rollers 30b on the wire.
  • the lugs 71 of the release lever 67 protrude into the lower part of the H-shaped tab 77.
  • a short axis piece 82 is attached to each of these lugs 71.
  • a sliding block 83 rests on this axis piece 82.
  • its rear side presses on the slide bearing surface 84 of the cross piece 85 of the H-shaped tab 77.
  • the feed rollers 30 are pressed on, there is a gap A between the slide piece 83 and the slide bearing surface 84, so that there is the guarantee that the full force of the spring assembly is always present in the pressed state 81 acts on the wire 29 to be drawn in.
  • the rod 79 projects on the rear side of the Spring sleeve 78 by a certain amount and each has a cross pin 87.
  • This cross pin 87 serves as the point of engagement of a double lever 88 which is rotatably mounted on one side on a bearing block 89 fixedly mounted in the housing 35 and is articulated on the other side to a hydraulic cylinder.
  • This hydraulic cylinder 90 is in turn rotatably connected to a bearing block 91 fixedly mounted in the housing 35.
  • the upper feed rollers 30b can be raised by increasing the gap A between the sliding block 83 and the slide bearing surface 84 such that it is never completely closed, even if the release lever 67 is in its upper position (ventilated) location.
  • This device which can be actuated manually at any time, is intended to allow the upper feed rollers 30b to be lifted off in the event of a fault or when a new wire ring is put on.
  • the wire ring 25 is placed on the mandrel 24 of the wire run-off and feed device 23.
  • the pressure roller 95 of the wire run-off and feed device 23 is in the raised state.
  • the beginning of the wire of the wire ring 25 can now be inserted between the mandrel 24 and the pressure roller 95.
  • the forming machine is started, but in the disengaged state.
  • the upper warming roller 17 is raised.
  • the upper feed rollers 30b are in the raised state, brought about by the two hydraulic cylinders 90.
  • the pressure roller 95 is now lowered, the mandrel 24 is driven. It rotates at an adjustable speed that corresponds to the average speed of the wire feed, determined by the feed rollers.
  • the wire 29 now passes through the straightening apparatus 26.
  • the feed drive of the wire run-off device 23 can then be stopped for processing the beginning of the wire.
  • the feed is then started again.
  • the leading and directed wire 29 is inserted into the cold feed device 19, the upper feed rollers 30b of which are in the raised state.
  • the wire 29 then runs through the heater 31, is heated to the forging temperature and finally reaches the hot feed rollers 17.
  • the forming machine is now engaged, i. H. Warm feed rollers 17 (upper roller still raised) and feed rollers 30 (upper rollers 30b still raised) rotate in time with the machine. When the start of the wire 29 has reached the warming rollers, they are lowered.
  • the feed rollers 30b are automatically lowered, while at the same time the pressure roller 95 of the wire feed device 23 is automatically lifted from the mandrel 24.
  • the wire 29 is now fed intermittently to the machine, while the mandrel 24 of the wire runner 23 continues to rotate at the set average speed. The 1st sheared section of bar is still removed, then the machine can produce forgings.
  • the feed rollers 30a, 30b pull the wire off the wire ring with full contact pressure, but are inoperative in the last phase of each feed stroke. In this last phase, the feed of the warm wire is carried on by the warm feed rollers alone, the contact forces or drive torques are so low that deformation of the warm wire is impossible.
  • the two material feeders are synchronously coupled to each other and driven by the forming machine.
  • This arrangement makes it possible to heat the wire to a maximum temperature that is most favorable for the forming process, since the heated piece of wire is subjected to practically no stress.
  • the drive of the cold feed device 19 is very simple, matched to the operating cycle of the machine, and no additional control elements and no additional drive units are required, which must be monitored by the control elements. The space requirement is also very small.
  • a new wire ring is placed on the mandrel 24, the rotational movement of which can be stopped since the weight of the previous wire is only very low.
  • the wire start of the new wire ring can already be processed.
  • the old wire has left the mandrel 24
  • the new beginning of the wire is threaded between the raised pressure roller 95 and the stationary mandrel 24.
  • the pressure roller 95 is lowered while the mandrel 24 is moving at a medium speed and at the same time the upper rollers 30b of the cold feed device 19 are raised.
  • the new beginning of the wire catches up with the end of the old wire. This takes place before the heater 31 is reached.
  • the speed of rotation of the mandrel 24 is again set to a medium speed.
  • the feed rollers 30b are lowered, while at the same time the pressure roller 95 is raised. The process continues.
  • the rewind reel 96 is brought into the dashed position 97 and mechanically locked.
  • the rewind button is then pressed. This causes the following: the upper warm feed roller 17 is raised, the two upper feed rollers 30b are raised, the pressure roller 95 is lowered, the mandrel 24 begins to rotate, in the reverse direction.
  • the rewinder reel 97 winds the wire back onto the wire ring. It can be retracted in whole or in part.
  • the ventilation curve 20 can be adjusted. By turning curve 20 around shaft 2, the time “start of ventilation can be set. This also allows the ratio of the cold feed stroke to the warm feed stroke to be set. By appropriate choice of the position of the curve 20, the effective stroke portion of the cold feed device 19 will always be somewhat smaller than that of the warm feed; the effective stroke of the cold feed device 19 should certainly be terminated at the latest when the front wire end hits the stop, in practice always a short time before. Thanks to the low contact pressure of the warm feed rollers, the latter slide on the warm wire in the last phase of each individual stroke.
  • the joint 39 (FIG. 4) is provided with an eccentric.
  • the distance between the pivot point 39 and the axis 40 can be varied.
  • the thermal expansion of the rod can be compensated.
  • This eccentric can be provided with a scale that can be set after calibration. This makes it easier to adjust the eccentric.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Forging (AREA)
EP82106884A 1981-08-14 1982-07-30 Verfahren und Einrichtung zur Materialzuführung an Warm- und Halbwarm-Umformmaschinen Expired EP0072476B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82106884T ATE22538T1 (de) 1981-08-14 1982-07-30 Verfahren und einrichtung zur materialzufuehrung an warm- und halbwarm-umformmaschinen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5270/81A CH653930A5 (de) 1981-08-14 1981-08-14 Verfahren und einrichtung zur materialzufuehrung an warm- und halbwarm-umformmaschinen.
CH5270/81 1981-08-14

Publications (3)

Publication Number Publication Date
EP0072476A2 EP0072476A2 (de) 1983-02-23
EP0072476A3 EP0072476A3 (en) 1983-07-20
EP0072476B1 true EP0072476B1 (de) 1986-10-01

Family

ID=4290785

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82106884A Expired EP0072476B1 (de) 1981-08-14 1982-07-30 Verfahren und Einrichtung zur Materialzuführung an Warm- und Halbwarm-Umformmaschinen

Country Status (6)

Country Link
US (1) US4488420A (enrdf_load_stackoverflow)
EP (1) EP0072476B1 (enrdf_load_stackoverflow)
JP (1) JPS5838632A (enrdf_load_stackoverflow)
AT (1) ATE22538T1 (enrdf_load_stackoverflow)
CH (1) CH653930A5 (enrdf_load_stackoverflow)
DE (1) DE3273572D1 (enrdf_load_stackoverflow)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4761980A (en) * 1985-03-01 1988-08-09 Sumitomo Metal Industries, Ltd. Method of feeding material to hot forging machine
JPS61199542A (ja) * 1985-03-01 1986-09-04 Sumitomo Metal Ind Ltd 熱間鍛造機への材料供給装置
JPS60244626A (ja) * 1985-05-09 1985-12-04 Teijin Seiki Co Ltd クローラ式車輌の走行装置
JPH0741345B2 (ja) * 1986-05-30 1995-05-10 住友金属工業株式会社 熱間鍛造装置
JPH0180241U (enrdf_load_stackoverflow) * 1987-11-13 1989-05-30
US6290439B1 (en) * 1994-12-30 2001-09-18 Black & Decker, Inc. Method and apparatus for forming parts from a continuous stock material and associated forge
US10446393B2 (en) 2017-05-08 2019-10-15 Asm Ip Holding B.V. Methods for forming silicon-containing epitaxial layers and related semiconductor device structures
CN115446224B (zh) * 2022-09-19 2024-04-12 大连环新新材料科技有限公司 一种金属线材的热矫直工艺方法
CN119657806B (zh) * 2025-02-20 2025-05-16 山西宝恒佳特种材料制造有限公司 一种高效圆钢锻造模具

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2234728A (en) * 1939-07-12 1941-03-11 Ajax Mfg Co Feeding and straightening means
DE1248601B (de) * 1964-11-17 1967-08-31 Schumag Schumacher Metallwerke Einer Draht oder Stangen verarbeitenden Einrichtung vorgeordnete Reduzier- und Vorzieheinrichtung
US3820367A (en) * 1972-10-30 1974-06-28 Nat Machinery Co Power feed and uncoiler for hot forging machines or the like
DE2454514C2 (de) * 1974-11-16 1983-10-27 Erich Grau, Stanzwerk für Elektrobleche, 7126 Sersheim Vorschubvorrichtung zur intermittierenden Materialzufuhr an Stanzen oder Pressen
JPS5165069A (en) * 1974-11-29 1976-06-05 Nat Machinery Co Netsukankazokino zairyokyokyusochi
DE2501506A1 (de) * 1975-01-16 1976-07-22 Peltzer & Ehlers Verfahren zur herstellung von pressteilen aus insbesondere zu einem bund aufgewickeltem drahtmaterial
EP0029464B1 (de) * 1979-11-27 1984-02-15 L. SCHULER GmbH Einzugapparat an Umformpressen für langgestrecktes Material in Stangen- oder Drehform

Also Published As

Publication number Publication date
DE3273572D1 (en) 1986-11-06
US4488420A (en) 1984-12-18
JPS5838632A (ja) 1983-03-07
EP0072476A2 (de) 1983-02-23
CH653930A5 (de) 1986-01-31
ATE22538T1 (de) 1986-10-15
EP0072476A3 (en) 1983-07-20
JPH0129613B2 (enrdf_load_stackoverflow) 1989-06-13

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