DE1777018A1 - Machine for forming a workpiece - Google Patents

Description

Applicant: Langenstein & Schemann Aktiengesellschaft

Title:

Machine for forming a workpiece

Description P 17 77 018.2

The invention relates to a machine for forming a workpiece between two bars, oei the one on a stand one of the both bars can be driven in the forward and reverse direction compared to the other is, in which a press cylinder space and a Hüoklaufz.ylinderraum are provided on the stand, which are delimited by pistons oind who attack the drivable bar, and that of one Valve device to the Preiizyliriderraum and to the return cylinder space a supply with jruokf liissigkei t, flow t.

Kb :; ind for example from the German patent specification No. ÖVb 796 or the German patent specification No. 1 116 b10 machines of this type are known which work as a press, as a Kinfuchhammer or as a hydraulic hammer with hydraulic coupling. K3 is also known to further train a press so that it can optionally be operated as an interlocking hammer, as the invention aims to create a machine of the type mentioned at the beginning, which

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Can be designed as a press, but also as a hammer can be operated.

The invention provides for this purpose a machine of the type Gate mentioned initially, which is characterized in that the two oppositely movable bears by means of a hydraulic coupling, having a discharge valve and can be filled via a supply line, are attacking with two Xoppelzweigen side of the bear coupleable , a stop valve is connected to the return cylinder space and two stop cylinder spaces, which are delimited by pistons engaging the drivable bear, are arranged laterally next to the press cylinder space.

The Pirfindung thus provides a machine for cold or hot forming of a ..erkstückes, which can work like a complete hydraulic drawing press or forging press, whereby the lower bear is equal to "anvil" and rests on a base plate during pressing; The machine can also, like a counter-blow hammer, deliver any number of blows with any energy immediately in connection : xn a pressing process, whereby the two bears move in opposite directions by means of the controllable coupling «

In the case of the mascnine according to the invention, a withdrawal or Return of one or both bears sent pressure fluid into the return cylinder chamber. This Jruckflüasigkeit applied which delimits the return cylinder space and is connected to the drivable

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ren hair attacking piston and drives back the drivable liaren. In a similar way, a pressing forward run of the drivable bar is brought about by pushing hydraulic fluid into the preclinical chamber. When the two bears strike forward, pressure medium located in the additionally provided impact cylinder spaces acts on them, delimiting the longitudinal cylinder belts and engaging the drivable external piston. The alarm is triggered by opening a known blow valve. jJ-is ßcrlagventil has such a large A Querscnnitt that the liquid present in the Rücklaufzylinaerraum naiiezu unhindered Ά \\ ε the! returning to flow zylinderraiiin.

In the case of the invented indur.gsgeniäüen machine, the outlet valve of the: iyarauiiscuen coupling is open for pressing, the one i'Air runs down in its retracted position during pressing and no forces are transmitted via the hydraulic coupling during pressing. The height of the machine is low because all the cylinder chambers are arranged on the side next to the press cylinder space Sc lay over the Xorniung moved v.irct. r ^ s i .-- tm ^: j /: lic: ·, a complete 7, ieaki st: en or a .aiswen'ereinrio '-. t inf with several lusvverfei'ctaber: to be provided for what tie: - ' / Ac- "work or. Armf Li e'.ir, ren ;; en n ^; itig and with a Dar, an ie: n a r, entr ^- ) l. -Ingeoran ter piston :: un ^: r ^:;. - (.- n irier; ϊ rii;:;: en ■ ι ·:, τ ^! i.: 't,' itjht is possible. Λ < .jcmI ··., ·: ;; / I i ndorräumo tiiner-

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side and the press cylinder space and the return cylinder spaces on the other hand are spatially separated so that no pressure medium can pass between these spaces. The machine can then hit a pressing process immediately.

The machine according to the invention is expedient and advantageous if a blow release valve with the Control line connecting the stop valve via a stop valve coupled to the outlet valve runs through this Training ensures that actuation of the Scilagvalve by the ocnlagausIonenventil is only possible then is when the outlet valve is closed and the safety valve coupled to it is open. Such a backup is appropriate because the machine for counter-blow and nicnt for Single impact is formed.

The invention then provides for a machine of the type mentioned at the beginning Type, in which the two bears are still connected by a hydraulic coupling with one or more paddocks, suppose that each coupling branch has one with one of the two bears has rigidly connected coupling rod with a movable Plunger is immersed in a coupling arm filled with liquid, which is bounded by a piston surface on the other Mren and into which a plunger sliding opposite the stand is immersed

The fluid in this hydraulic coupling is only slightly and in a simple manner when the hydraulic coupling is actuated

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emotional. As a result of this hydraulic coupling, undesired undesirable lateral movements of the one bear are caused by the coupling compared to the other, such as «bouncing, reduced. Compressibility and natural oscillation of the coupling fluid are chosen so that undesired relative movements of the two bears and the resulting double strikes are prevented. The hydraulic coupling according to the invention has exclusively Plunger stressed by pressure and only a little liquid, which when the Mascnine is operated as a press via an outlet valve he pulsates without pressure between the coupling space and a hydraulic tank. It is therefore particularly important for the one described at the beginning Machine according to the invention can be used with advantage.

In the drawing is a preferred embodiment of the invention Machine shown. It shows

1 shows in section a machine for reshaping a workpiece;

FIG. 2 shows a hydraulic coupling for the machine according to FIG. 1 i and

3 shows a control device according to FIG. 1,

The machine shown is essentially designed as a press, which do not restrict their properties as a drawing press or can be used as a forging presoe, and by simple additional facilities is so completed that it can also work as a counter blow hammer. You iat one vertical working mascnine with an upper die 101a carrying

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lowering upper bear 101 and a lower die 102a carrying. lower bears 102. The two bears 101 * 102 have one large work surface, as is characteristic of a press »The two bears 101, 102 are opposite to one another on a stand 1C3 movably guided in the forward and reverse.

The stand 103 has four pillars, the two rear ones Pillars 103a, 103b are shown »The pillars are angular profile-like in cross-section, encompass the corners of the two bears 101, 102 and stand on the corners of a base plate 103c. A hole is provided in each of the four corners of the base plate 103c, in which a spring 171 is arranged, on which a disk 172 lay at the top. The disk 172 carries one upwards out of the base plate 103c protruding bolt 173. Against this bolt 173 presses from above a plunge 174 on one of the four sides of the lower bear 102 is attached. Below the disk 172 the bore is filled with liquid, with this vise in Each of the four corners of the base plate 103c is provided with a hydraulic buffer that allows the lower bear to touch down gently 102 on the base plate 103c guaranteed.

A press cylinder space 104a is provided on top of the stand 103, which is formed by a cylinder wall 105. An upper piston 106a can be moved up and down in the press cylinder space 104a, limited the press cylinder space and is rigidly connected to the upper bear 101. A return cylinder space 107 is also provided from the cylinder wall 1Oi? formed and towards the top from the upper one Piston i0ba limited. - 7 -

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via the upper piston 1Oba is arranged centrally to the upper bear 101 « To the side of the upper piston 10ba, two further plungers or pistons 108, only one of which is shown, are provided. The further pistons 108 can each be moved up and down in an impact cylinder chamber 109, which is on top of the stand 105 is attached. The two other pistons 108 grip two diagonally opposite backs of the upper bear 101 at. Each impact cylinder space 109, which is a pressure chamber, is with at zurückgel;: ufenem upper bear 101 compressed High pressure gas such as nitrogen. The gas is, which is not shown, from a pressurized gas cylinder via a pressure reducing valve and a shut-off valve, as well as from controlled by a gas manometer and a gas pressure relief valve, in the lock cylinder chambers closed when the machine is in operation 109 can be brought with adjustable pressure. Instead of two percussion cylinder chambers 109 and two further pistons 108 can also to be provided more «

The upper bear 101 and the lower bear 102 are hydraulic Coupling 110 forcibly coupled in opposite directions. The coupling 110 has four coupling branches 150 which are spaced apart by the center line of the machine and engage the two bears 101, 102 near their corners.

7 to each coupling point veig 15 (belongs a coupling rod 151, one end of which is attached rigidly or elastically to the upper bear 101 is and at the other end in one with it movable

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Plunger 152 passes over, ±> the movable plunger 152 dips into a coupling space 155t which is filled with liquid, for example oil, and which is immovable with respect to the lower bearing 102. A piston surface 154 on the lower bear delimits the coupling space 155 in which, from below, a plunger resting opposite the stator 103

155 dives ο Me piston surface 154 is above the in the coupling space 155 submerged end of the resting plunger 155 is provided. Static plunger and movable plunger 152 are relative movable up and down on parallel axes to the lower bear 102

The coupling space 153 of each coupling branch 150 is in each case partially formed by the lower bear 102 and the coupling rod 151 is in a bore extending to the coupling space 155

156 of the lower bear 102 led. In the embodiment according to 1, the entire coupling space 153 is arranged as an extension of the resting plunger 155 and has the resting plunger a bore 157 which is open towards the movable plunger 152 and into which the movable plunger can be pushed. In the embodiment according to FIG. 2, however, the coupling space 1 1 - 3 consists of two juxtaposed and connected via a hole 158 Sub-rooms, The sub-room accommodating the plunger 155 is in this case rigidly attached to the lower bear 102 at a later date Cylinder formed "

The coupling spaces 153 each of two coupling branches 150 are above a compensating line 159 connected to one another, Üin outlet »

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valve 160 is in the embodiment according to FIG. 1 in nicnt V / eise shown in one of only one of the coupling spaces 153 coming from and running through a stationary plunger 155 Outlet line 162. In contrast, in the embodiment according to FIG for the outlet line - "162 of the formation of the stationary plunger 155 because of the coupling spaces 153 of all coupling branches 150.

The outlet line 162 gent after the outlet valve 160 into a feed line 163 over, the one from the outlet valve located at the bottom of the lower bear 102 up to one on the stand 103 Reservoir leads. In the reservoir 127 there is liquid, for example oil, into which both the striking cylinder chambers 109 and also the press cylinder space 104a and the return cylinder space 107 rfxgen.

The lower bear 102 is many times heavier than the upper one bear 101 that can be driven. Below the lower bar 102 a hydraulic ejector device 164 is provided, which with an ejector rod 165 in a hole in the lower bear protrudes, üin ücnlugventil 118 is in a connecting line strong C ^ uorsonnittes, which the return cylinder space 107 with the reservoir 127 connects. Ie the impact valve 118 is on known manner designed so that it is kept open after it has been opened by liquid that through the connecting line flows. No liquid flows through the connecting line, the valve will fall through Weight and / or by spring loading and 3blocks the connection line. _-] (, _

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An electrically controlled impact release valve 120 is located in a control line 1bb, one end of which leads to the impact valve 118. Liquid carried through the control line 166 to the impact valve 118 opens the impact valve, - the control line 166 leads over a impact relief valve 129, which is used as a safety device. This impact control valve 1k: 9 _t is coupled to the outlet valve 160 in such a way that it only opens the passage through the control line 166 when the outlet valve is closed. On the other hand, the passage through the control line 166 is blocked when the outlet valve 160 is open. The control line 166 leads after the safety valve to a control pump 126a, which pumps the pressure fluid from the reservoir 127

The control pump 126a also feeds a control line 1b7, in which an electrically controlled actuating valve 168 is located and which leads to the outlet valve 160. The exhaust valve 160 is urged by means of a spring into its open state and closed when open, d.n. activated actuating valve 168, liquid through the control line 167 to the Exhaust valve 1b0 arrives,

in the machine of FIG. 1 is a 'lauptpumpe provided 114 from the reservoir 127 pressure fluid either via a VentilDatterie HO "pressing" in the Preßzylinderraum 1o4a or via a V _e ntilbatterie 141 "retreat" and a power supply 116 in the return cylinder space 107 promotes. The direction of conveyance

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the iiaupinumpe 114 is accessible by a on the wall of the Reservoirs 127 attached ebelmecl-mnisinus 142 and means a cylinder piston device 146 can be changed.

In a draft of the upper 101, the hydraulic fluid delivered by the main pump 114 flows into the return cylinder space 10 7. "Ird the valve piston 14 ^ b is pushed down, a poppet valve is lifted 144 of outlets 145, the Preßzylinderraum 104a connect to the reservoir Λ'άΊ" The upper piston i0ba which moves at a reflux of the upper bears 101 upward , Forces fluid from the press cylinder chamber 104a into the reservoir 127. When the upper bearing 101 presses forwards, hydraulic fluid delivered by the main pump 114 flows into the upper cylinder chamber 1O4a. Liquid located in the return cylinder space 107 is displaced into the reservoir 127 via the valve battery 141 “retraction”.

The machine or the main pump 114 is opened for striking "Withdrawal" is set and the outlet valve 1bO is closed when the upper bar 101 reaches the preselected seal height on an electric Has reached switch 147a. Should the upper bear 101 still feel a little upwards when the exhaust valve 160 is closed, so Fluid can be sucked into the coupling spaces 153 of the hydraulic coupling 110 via a suction valve 161.

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This suction valve 161 is located in a line which is the outlet line 162 connects to the supply line 163.

The stroke height, i.e. the distance between the two retreated bears 101, 102 when hitting is adjustable. For this purpose, the electrical switch 147a is provided on one column 103b, the can be moved up and down on the column in a V / eise not shown. This switch 147a is attached to the upper bear 101 by one Cam 148a can be actuated. The electrical switch 147a is connected via an electrical line 149 connected by relays to the impact release valve 130 and operates it when operated by the cam 148a. The switch trigger valve 130 switches per stroke. The actuating valve 16Θ on the other hand, switching takes place at the beginning of the coupling, i.e. shortly before the first beat, and drops out when the lower bear 102 joins a cam 148b reaches an electrical switch 147b.

In the embodiment according to FIG. 3, the main pump 114, which is designed, for example, as a high-pressure axial piston pump, delivers pressurized fluid from the reservoir 127 via the feed 116 and via a return valve 117 into the return cylinder area 1Ό7 when the return valve is open. ±> le main pump 114 conveys its pressure fluid into the press cylinder chamber 104a and via a feed 113 and a press valve 115 when this is open, the return valve 117 being closed. The press valve 115 has a first partial valve 115a, via which the press cylinder chamber 104a can be connected to the main pump, and a second one

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Partial valve 115b via which the press cylinder space can be connected to the reservoir. Is open the second Teilventii 115b, and the first section valve 115a and the return valve 117 closed, the Preßzylinderraum 104a is connected to the reservoir 127 from which fluid under Vorfüllaruck in the Preßzylinderraum flows _o Finally, a .Wegeventil 119 is provided which, when it is open, connects the return cylinder space 107 with the reservoir 127 "

The pressure valve 115, the return valve 117 and the directional control valve 119 can be operated via rods. Are the first part valve 115a and the return valve 117 closed and the 119 and the second partial valve 115b open, the upper bear 101 moves in the pressing flow, with liquid below Pre-charge pressure flows into the press cylinder space 104-a. Are these Return valve 117 and the second partial valve 115b are closed and the directional control valve 119 and the first partial valve 115a open, so sicfi the upper bear 101 moves in the pressing advance, whereby Liquid under high pressure in the press cylinder space 104a flows. Are 'the return valve 117 and the second partial valve 115b open and there :; ./ege-ventil 119 and the first partial valve 115a closed, the upper bear 101 moves in the reverse direction.

The high pressure supplied by the main pump 114 acts on the return Liquid on a control piston 169 of a back valve 170 in the opening channel. Through the open

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Check valve 170 can be displaced from the press cylinder chamber 104a liquid escape into the reservoir 127. Part of this liquid also escapes through the second partial valve 115b into the reservoir 127 »

While the machine is working like a press, the exhaust valve is 160 opened by actuating the actuating valve 168, so that the coupling spaces 153 are connected to the reservoir 127 are · To hit, when the upper bear 101 has run back, the Outlet valve 160 closed and the position of pressure valve 115, return valve 117 and directional control valve 119 for "return" maintained. An impact is triggered by the impact valve being opened by the impact release valve 130 · On impact Both that located in the return cylinder space 107 and that from the main pump 1H flow into the return cylinder space subsequently delivered liquid back almost unhindered

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Claims (1)

Claims
P 17 Ti 018.2 1.) Machine for forming a workpiece between two bears, in which on a stand one of the two ü'ären can be driven relative to the other in the flow and return, in which a press cylinder space and a return cylinder space are provided on the stand, which are delimited by pistons , which attack the drivable bear, and in which a supply of pressure fluid runs from a valve device to the press cylinder chamber and to the return cylinder chamber, daduroh pekennzeich.net that the two counter-rotating bear (101, 102) by means of a hydraulic coupling (110), the one -uslaßventil (160) and can be filled via a supply line (163), with two coupling branches (150) engaging at least one of the bears laterally, can be coupled, a stop valve (118) is connected to the return cylinder space (107) and two percussion cylinder spaces ( 109) »'which are limited by the piston U08) acting on the drivable bearings (101), laterally next to the press cylinder space (104a) are arranged. 2.) Machine according to claim 1, characterized in that when the bear (101, 102) has returned, a pressure chamber (109) encompassing the impact cylinder space (109), which is shut off during operation, is filled with high pressure compressed gas. - 1b - ■ · 10983n / npp7 BATH 3 ») Machine according to claim 1 or 2, characterized in that the drivable bear (101) is many times lighter than the other bear (102). 4o) Machine according to claim 1, 2 or 3, characterized in that in the case of the non-drivable bear (102) an ejector device (164) with several ejector rods (165) protruding through the non-drivable bear is provided. 5o) Machine according to one of the preceding claims 1 to 4 » characterized in that the coupling branches (150) of the hydraulic coupling (110) are connected to one another via a compensation line (15"') and the outlet valve (160) with only one of the coupling branches is" b.) is used to mark machine according to one of the preceding claims 1 to 5 »characterized GEK e, that a Scnlagauslösenventil (130) with the Schlarventil (1'8) connecting the control line (166) via a coupled with the outlet valve (160) Scnlagsicnerungsventil (129 ) runs. 7.) Machine according to one of the preceding claims 1 to 6, characterized in that the from a high above the outlet valve (1 <-> 0) arranged reservoir (127) incoming animal feed line (Uo) via the outlet valve with the hydraulic coupling (110 ) connected is. - 17 - BATH - 17 - 1777013 * b.) Machine in particular according to one of the preceding claims, characterized in that each coupling branch (150) has a coupling rod (15 I) which is rigidly connected to one of the two oval (101, 102) and which has a movable plunger (152) in one fluid-filled coupling space (153) which is delimited by a piston surface 054) on the other bear and in which a plunger (155) which runs opposite the stand (103) is immersed. [). ) Machine according to claim 7 » characterized in that the coupling space (155) is arranged as an extension of the running plunger (155) and the stationary plunger has a bore (157) open to the movable plunger, into which the movable plunger is retractable. 10.) Machine according to claim 7 or B, characterized in that the coupling space (15 ^) is at least partially formed by the one bar (102) and the bear on the coupling rod (151) is gefünrt. 109830/0687 BAD ORIGitNAi /