US3739621A - Metal drawing machine - Google Patents

Metal drawing machine Download PDF

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Publication number
US3739621A
US3739621A US00143019A US3739621DA US3739621A US 3739621 A US3739621 A US 3739621A US 00143019 A US00143019 A US 00143019A US 3739621D A US3739621D A US 3739621DA US 3739621 A US3739621 A US 3739621A
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US
United States
Prior art keywords
carriage
bed
rollers
drawing machine
machine according
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 - Lifetime
Application number
US00143019A
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English (en)
Inventor
H Pfeiffer
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.)
TH Kieserling and Albrecht GmbH and Co
Original Assignee
TH Kieserling and Albrecht GmbH and Co
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 TH Kieserling and Albrecht GmbH and Co filed Critical TH Kieserling and Albrecht GmbH and Co
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Publication of US3739621A publication Critical patent/US3739621A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by means other than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, rods or tubes
    • B21C1/27—Carriages; Drives
    • B21C1/30—Drives, e.g. carriage-traversing mechanisms; Driving elements, e.g. drawing chains; Controlling the drive

Definitions

  • ABSTRACT Draw bench for rods and pipes having a carriage movable axially on a bed. The carriage is moved back and forth by compression and tension rods arranged in the machine bed. One end of the rods connects to the carriage and the opposite end is interposed between a frictional roller drive secured at a fixed location.
  • the invention relates generally to a metal working machine for drawing elongated workpieces such as rods or pipes and, more particularly, to a drawing ma chine in which the draw carriage is adapted to be moved back and forth by tension or compression means secured in the bed of the machine.
  • idle time denotes the time required for the carriage to return to its starting position in front of the dieblock after one drawing operation.
  • the time required for the loading cycle, i.e. to bring the next batch of material to be drawn to the work position in front of the dies is, in fact, substantially less than the time required to return the carriage to its position in front of the dieblock.
  • Drawbenches are also already known in which the carriage is moved back and forth without the use of tension inducing members.
  • the draw carriage is driven by a rack and pinion arrangement.
  • the pinions are arranged on the carriage, and are driven by electric motors secured on the carriage.
  • the pinions engage the racks provided in the bed of the machine laterally of the carriage.
  • the carriage is supported on rollers running on tracks parallel with the racks.
  • the device in accordance with the invention provides for moving the carriage by means of compression and tension rods to which the thrust forces required to move the carriage are transferred by stationary drive rollers adapted to be biased against the rods.
  • compression and tension rods to drive the carriage requires only a small space, as the guidance of the rods may be partly accommodated in the bed of the loading bench. It also has the advantage that the application of power to the carriage is more reliable and less expensive than in known drawbenches in which the carriage carries its own drive means.
  • Another aspect of the present invention resides in a device of the type delineated above, in which, in order to press the drive rollers uniformly against the rods which are attached to the carriage, there is provided a set of two or more rollers disposed in a single plane which are bridge mounted together with their drives; the bridges are arranged to move in a vertical plane perpendicular to the bed of the drawbench and are loaded by hydraulically actuated pistons.
  • the rollers are preferably driven by hydraulic motors having their feed and return lines arranged in parallel and connected through check vallves to the pressure line connecting to the hydraulic cylinders, also arranged in parallel.
  • the pistons within the cylinder are adapted to press the rollers against the compression and tension rods. This has the substantial advantage that the pressure, which has to be delivered by the pistons, automatically adjusts itself to the torque required to drive the rollers.
  • FIG. l is a side elevational view of a drawbench in accordance with the invention.
  • FIG. 2 is a plan view partly in section, of the drawbench shown in FIG. 1;
  • FIG. 3 is an enlarged sectional view taken along the line A-B of FIG. 1, showing the guide for the rods in the bed of the drawbench;
  • FIG. 4 is a sectional view taken along line C-D of FIG. 6;
  • FIG. 5 is a sectional view taken along line EF of FIG. 4;
  • FIG. 6 is a view partly in section of the piston arrangement and of the drive rollers bearing against the rods;
  • FIG. 7 is a hydraulic diagram.
  • FIGS. 1 to 6 there are shown a plurality of axially spaced frame I for supporting two laterally spaced guide beds 2,2a, which in turn support a draw carriage 3 and a drive means therefor.
  • the drive for the carriage 3 comprises compression and tension rods 4,40, arranged on opposite sides of the carriage and in each guide bed 2,2a.
  • the rods 4,4a are rigidly connected to the carriage by arms 6,6a, which are secured to the rods by bolts 5 and extend from the rods, through a longitudinally extending slot in tubular beds 22,24, to the carriage with an L-shaped portion of each arm 6 and 6a engaging the carriage on opposite sides thereof, see FIG. 3.
  • the opposite or far ends of the rods are clamped between a pair of drive rollers 7, see FIGS. 1 and 5, for transferring thrust forces upon the rods to move the carriage back and forth, as hereinafter explained in greater detail.
  • the compression and tension rods 4,4a are slidably disposed in longitudinally extending and horizontally arranged beds 2,2a having a substantially rectangular cross-section to prevent buckling of the rods in the bed.
  • the beds are also provided with lubricating means, not shown, which may run into channels 8,8a.
  • the rods may, of course, also be supported on roller tracks in the bench bed.
  • the rollers 7 are mounted, as shown, with their drives, in bridges 9,9a,10,10a, which are mounted, for vertical movement in a plane perpendicular to the beds 2,2a, in stationary frames 11,12.
  • the frames are connected to beds 2,2a and movement of the bridges and the rollers housed therein, into operating position is accomplished by hydraulically actuated pistons 13 engaging the bridges 9,9a and 10,10a, see FIGS. 4 and 6, for the purpose of pressing rollers 7 against the rods 4,4a.
  • the pistons 13 are movably arranged in cylinders 14 and secured to frames 11,12.
  • the rollers 7 are mounted on shafts 15 carrying a spur gear 16 and engage a spur gear 17, see FIGS. 4 and 5, secured to a shaft 18.
  • Each shaft 18 has secured to it a worm gear 19 engaging a worm 22 secured to shafts of hydraulic motors 21,210.
  • Each set of two rollers 7 are driven by one of hydraulic motors 21,2la.
  • the hydraulic motor feed and return lines 23,24 are connected in parallel and are also connected, through check valves 25, 26, to pressure lines 27, 27a of parallel connected cylinders 14 for pistons 13.
  • the cylinders 14 also contain plate springs 28 resting against piston 13 and reacting against the cover 14a of cylinder 14.
  • the springs 28 press the rollers against the rods 4,4a when the pressure medium in cylinders 14 is not under pressure.
  • the pressure medium flows to and from a hydraulic station 29 through line 30 and distributor 31.
  • three pumps are provided to supply the oil under pressure to hydraulic motors 21,2la, two of the pumps, P1 and P2, being driven by one motor M1.
  • the third pump P3 is driven by a separate motor M2. This makes it possible to select a plurality of drawing speeds although some other combination of pumps may be provided, in order to satisfy different drawing speed requirements.
  • Each of the pumps is connected to a pressure-regulating valve, 32,33,34, and an electromagnetically operated reversing valve, S1, S2, S3.
  • the pumps P1, P2, P3 are also in communication, through check valves 35, 36, 37, line 38, and electromagnetically operated reversing valve S4, with feed and return lines 23, 24 to hydraulic motors 21,21a.
  • valve S4 Connected to valve S4 is a pressure-regulating valve 47 which is connected through control line 40 to an electromagnetically operated control valve S5.
  • a second pressure-regulating valve 42 is also connected through control line 41 to control valve S1.
  • the pressureregulating valve 32 is in communication, through control line 43, with control valve S1.
  • the pressureregulating valve 34 is in communication, through con trol line 44, with control valve S3, and pressureregulating valve 33 is in communication, through control line 45, with control valve S2.
  • the method of operation is as follows:
  • valve S4 After motors M1,M2 are switched on and control valve S4 is set to the position shown in FIG. 7, the pumps P1, P2, P3 deliver oil, initially without pressure, back to the tank. If the drawing operation is to be initiated, valve S3 is moved to a position such that the return flow of oil from pump P3 is shut off. The pressure set at pressure-regulating valve 34 then becomes effective, as the oil delivered by pump P3 through nonreturn valve 37, line 38, valve S4, and line 38a is passed to motors 21, 21a.
  • Oil flowing from motors 21,21a can flow back into the tank through lines 24,2411, check valve 46, valve S4, and pressure-regulating valve 47, since valve S5 has previously been set to a position such that there is no pressure in control line 40, and the oil from motors 21,2111 can therefore flow without pressure through pressure-regulating valve 47.
  • oil passes through check valve 25 and line 27 to cylinders 14 for pistons 13.
  • the drawing carriage 3 then begins to move slowly.
  • valves S1,S2 associated with pumps P1,P2 are set to shut off the return of oil to the tank. The pressure selected by pressure-regulating valves 32,33 then comes into effect. If the drawing operation is to be terminated, valves S1,S2, S3 are returned to the settings shown in FIG. 7.
  • Pressure-regulating valves 34,33,32 are thus set, through control lines 44,45,43, in such a manner that the oil from pumps P1,P2,P3 can flow back to the tank.
  • valve S5 is set to the position shown in FIG. 7, whereby pressure-regulating valve 47 is set, through control line 40, in such a manner that the pressure to which it is set comes into effect.
  • valve S4 is set in such a position that line 38 is connected to line 240.
  • valve S5 is set in a manner that the oil subsequently to be released from motor 21a may flow back to the tank without pressure through line 38a, valve S5, and pressure-regulating valve 47, since control line 40 is without pressure.
  • valves S1,S2,S3 are set in such a manner that pressureregulating valves 32,33,34 prevent the flow of oil into the tank, and the pressure to which these valves are set may therefore come into effect.
  • the oil then flows through line 38, valve S4, and line 240 to motor 21a which can then reach a correspondingly high r.p.m. because the flow of oil to motors 21 is prevented by check valve 46.
  • Controllable check valves 55,56,57 are opened simultaneously through control line 54, so that the oil delivered by motors 21 the carriage rollers are driven when the said carriage returns can circulate through check valves 55,56,57 and 48,49,50.
  • valves S1, S2, S3 are first set in a position such that oil from pumps P1,P2,P3 can flow back to the tank without pressure, through pressure-regulating valves 32,33,34.
  • valve S5 is set to a position such that that control line 40 is closed off and the pressure to which pressure-regulating valve 47 is set may come into effect, i.e.
  • controllable check valve 46 is opened by the pressure obtained in line 38a, which is determined by pressure-regulating valve 47.
  • valve 81 When the carriage-return speed has dropped to an extent that the said carriage may run against the die block without causing damage, valve 81 is set to a position such that lines 43 and 41 are connected together. However, since the pressure to which pressureregulating valve 42 is set is substantially less than that at pressure-regulating valve 32, the pressure at valve 42 comes into effect. The oil from pump P1 can therefore operate only at a low pressure. At the same time that valve S1 is reset, valve S5 is also moved to a position such that the oil can flow away without pressure through line 38a, valve S4 and pressure-regulating valve 47. This enables the carriage to arrive at the die block at a very low speed, and come to a halt; the speed being determined by the volume of oil delivered by pump P1 and the pressure set by pressure-regulating valve 42.
  • valve S1 is set to allow the oil from pump P1 to flow back to the tank under no pressure through pressure-regulating valve 32, Check valves 36 and 37 prevent a flow of oil from pump P1 to pressure regulating valves 33,34 when only pump P1 is delivermg.
  • the setting of all valves is carried out by a known sequence control circuit which ensures fully automatic operation of the drawing cycle.
  • a drawing machine for elongated workpieces such as rods or pipes comprising:
  • a metal drawing carriage disposed longitudinally movable on and parallel to said bed;
  • rod-like tension and compression means slidably disposed within said bed and connected to said carriage;
  • rollers and a drive therefor, said rollers being effective to be biased upon said rod-like means for transferring thrust forces thereupon to move said carriage back and forth.
  • rollers are arranged at a fixed location adjacent to said bed.
  • a drawing machine to claim 1, wherein said rollers are arranged above and below said rod.
  • rollers and the drive therefor are mounted in sets of two in bridges arranged perpendicular to the longitudinally extending plane of the bed and the rod-like means.
  • a drawing machine according to claim 1, and hydraulic piston means disposed in operating relation to said rollers for biasing said rollers against said rod-like means.
  • said drive for said rollers comprises hydraulic motors and hydraulic fluid feed and return lines connected in parallel to each other;
  • a drawing machine according to claim 1, wherein said bed is substantially tubular for carrying said rodlike means against buckling.
  • tubular bed having a longitudinally extending slot; and an arm secured to said rod-like means and projecting through said slot and engaging said carriage.
  • a drawing machine wherein said bed is composed of two tubular members spaced in parallel relation with said carriage movably arranged therebetween; and said rod-like means and the con necting arm therefor in each tubular member of said bed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Press Drives And Press Lines (AREA)
  • Fluid-Pressure Circuits (AREA)
US00143019A 1970-05-19 1971-05-13 Metal drawing machine Expired - Lifetime US3739621A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702024273 DE2024273B2 (de) 1970-05-19 1970-05-19 Antrieb fuer den ziehwagen einer ziehmaschine fuer langge streckte werkstuecke wie stangen oder rohre

Publications (1)

Publication Number Publication Date
US3739621A true US3739621A (en) 1973-06-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00143019A Expired - Lifetime US3739621A (en) 1970-05-19 1971-05-13 Metal drawing machine

Country Status (7)

Country Link
US (1) US3739621A (enrdf_load_stackoverflow)
CA (1) CA937203A (enrdf_load_stackoverflow)
DE (1) DE2024273B2 (enrdf_load_stackoverflow)
FR (1) FR2072254A5 (enrdf_load_stackoverflow)
GB (1) GB1302936A (enrdf_load_stackoverflow)
HU (1) HU162601B (enrdf_load_stackoverflow)
NL (1) NL7015162A (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2146570C1 (ru) * 1997-11-20 2000-03-20 Акционерное общество "Иркутский завод тяжелого машиностроения" Непрерывный волочильный стан
RU2235615C1 (ru) * 2003-06-04 2004-09-10 Стазаев Владимир Николаевич Волочильная машина

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US168975A (en) * 1875-10-19 Improvement in machines for drawing and polishing bars
US323619A (en) * 1885-08-04 alldeedice
US1765047A (en) * 1926-09-08 1930-06-17 Union Drawn Steel Company Drawing machine
US2536637A (en) * 1945-06-13 1951-01-02 Aetna Standard Eng Co Drawbench
US2674367A (en) * 1948-08-30 1954-04-06 Metal Manufactures Ltd Drawbench
US2767829A (en) * 1952-07-07 1956-10-23 Hallden Machine Company Apparatus for drawing rod stock
US3175385A (en) * 1963-05-01 1965-03-30 George A Mitchell Company Drawbench
US3250362A (en) * 1964-01-07 1966-05-10 George A Mitchell Workpiece handling apparatus

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US168975A (en) * 1875-10-19 Improvement in machines for drawing and polishing bars
US323619A (en) * 1885-08-04 alldeedice
US1765047A (en) * 1926-09-08 1930-06-17 Union Drawn Steel Company Drawing machine
US2536637A (en) * 1945-06-13 1951-01-02 Aetna Standard Eng Co Drawbench
US2674367A (en) * 1948-08-30 1954-04-06 Metal Manufactures Ltd Drawbench
US2767829A (en) * 1952-07-07 1956-10-23 Hallden Machine Company Apparatus for drawing rod stock
US3175385A (en) * 1963-05-01 1965-03-30 George A Mitchell Company Drawbench
US3250362A (en) * 1964-01-07 1966-05-10 George A Mitchell Workpiece handling apparatus

Also Published As

Publication number Publication date
SU374792A3 (enrdf_load_stackoverflow) 1973-03-20
HU162601B (enrdf_load_stackoverflow) 1973-03-28
DE2024273B2 (de) 1971-04-22
NL7015162A (enrdf_load_stackoverflow) 1971-11-23
CA937203A (en) 1973-11-20
FR2072254A5 (enrdf_load_stackoverflow) 1971-09-24
GB1302936A (enrdf_load_stackoverflow) 1973-01-10
DE2024273A1 (enrdf_load_stackoverflow) 1971-04-22

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