CN103372635A - Mold clamping device and later casting apparatus employing the mold clamping device - Google Patents
Mold clamping device and later casting apparatus employing the mold clamping device Download PDFInfo
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- CN103372635A CN103372635A CN2013101479964A CN201310147996A CN103372635A CN 103372635 A CN103372635 A CN 103372635A CN 2013101479964 A CN2013101479964 A CN 2013101479964A CN 201310147996 A CN201310147996 A CN 201310147996A CN 103372635 A CN103372635 A CN 103372635A
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Abstract
The invention provides a mold clamping device and a later casting apparatus employing the mold clamping device. A hydraulic housing (22) is fixesly arranged on a long side tank (3b), a rod (32) connected with a pull rod (35) is inserted into the hydraulic housing in a liquid sealing manner, the other end of the pull rod (35) is clamped on the support portion (38) of the long side tank (3a) in a manner not release from the side of the long side tank (3b), a piston (30) is movably arranged in the hydraulic housing (22), the front surface of the piston is fixedly provided with the rod (32), the back surface of the piston (30) is fixedly provided with the rod (31), the back portion of the rod (31) is convex backwards from the hydraulic housing (22). Costs are reduced, and dust is prevented from entering.
Description
Technical field
The continuous casting equipment that the present invention relates to the mold clamping device and use this mold clamping device, the a pair of long limit casting die part that utilizes arranged opposite and in the same way the pair of short edges casting die part of arranged opposite between this a pair of long limit casting die part form in the continuous casting equipment in casting cross section of rectangle, come this length limit casting die part is fixed each other with the state that the minor face casting die part is held between the casting die part of long limit by above-mentioned mold clamping device.
Background technology
The molten steel that utilizes converter refining and get, be stored in casting ladle and carried towards continuous casting equipment, and then be injected in the mold of continuous casting equipment, cooling and form solidified shell at periphery in this mold, then, section is contained under the state of molten steel within it, does not pull out downwards from the bottom of mold solidifying slab.And, (roller zone) supports the above-mentioned slab of not solidifying in the roller district that comprises a plurality of rollers, and further cool off by make the above-mentioned slab of not solidifying from the nozzle ejection cooling water, do not solidify after slab solidifies fully above-mentioned, cut off with the interval of the suitable length on the long side direction and form slab.Like this, in continuous casting equipment, molten steel is injected in the mold continuously, and forms slab so that this molten steel solidifies continuously.
In this continuous casting equipment, because slab forms tabular (slab) usually, and its cross section forms rectangle, so constituting, mold comprises the long limit copper coin that contacts with the face of the long side of slab and this face is cooled off, with the minor face copper coin that contacts with the face of the short brink of slab and this face is cooled off, and a pair of long limit copper coin is configured to opposite one another, and between these long limit copper coins, the pair of short edges copper coin is configured to opposite one another, molten steel is injected into the zone that is surrounded by these long limit copper coins and minor face copper coin, is cast as thus the rectangular slab in cross section.
And, in existing mold, can accordingly the minor face copper coin be replaced with the different copper coin of its minor face width from the cross sectional shape as the slab of foudry line.That is, by changing the interval between the copper coin of long limit and between this length limit copper coin, changing the different copper coin of configuration bond length, can change the thickness of slab.
Fig. 4 is near the stereogram of the mold of this continuous casting equipment, by the one Partial Resection is illustrated its inside.Fig. 5 is the top view that schematically shows the essential structure of mold, and Fig. 6 is the schematically illustrated stereogram of extracting mold from the state of Fig. 4 out.The long limit copper coin 101a of fixation side and the long limit of drawer at movable side copper coin 101b arranged opposite, be provided with the long limit water tank 103a of fixation side that the long limit copper coin 101a of this fixation side is cooled off in the behind of the long limit copper coin 101a of fixation side, be provided with the long limit water tank 103b of drawer at movable side that the long limit copper coin 101b of this drawer at movable side is cooled off in the behind of the long limit copper coin 101b of drawer at movable side.Between this length limit copper coin 101a and long limit copper coin 101b, dispose minor face copper coin 102a and minor face copper coin 102b in opposed mode, also be respectively arranged with minor face water tank 104a, the 104b that minor face copper coin 102a, 102b are cooled off in the behind of these minor face copper coins 102a, 102b.Casting space pour steel towards the rectangle that is surrounded by these long limit copper coin 101a, 101b and minor face copper coin 102a, 102b, molten steel is grown limit copper coin 101a, 101b and minor face copper coin 102a, 102b cooling, and molten steel solidifies at periphery and forms solidified shell, under this state from mold towards below this do not solidified slab 110 carry out drawing.Make this slab 110 produce flexural deformation by the roller district that comprises a plurality of rollers 111, and this this slab 110 is guided to level.Within this period, cool off slab 110 from the nozzle ejection cooling water that is disposed between the roller 111, thereby slab 110 is solidified fully.After solidifying fully, cut off slab with the length of regulation, and carry slab after cutting off towards follow-up operation.
For the minor face mold that comprises minor face copper coin 102a and minor face water tank 104a, utilize bilevel axle 106a1,106a2 that above-mentioned minor face mold is supported as moving along the slab width.In addition, for minor face copper coin 102b and minor face water tank 104b, utilize too bilevel axle (not shown in Fig. 4) that it is supported as moving along the slab width.And, divide up and down at the back side of the long limit copper coin 101b of drawer at movable side and long limit water tank 103b to be provided with two stack clamping device 107b1,107b2,107b3,107b4 along the slab width, the screw jack 108a1 corresponding with these clamping devices, 108a2,108a3,108a4(do not illustrate 108a2,108a4 two-layerly) be arranged at the back side of the long limit copper coin 101a of fixation side and long limit water tank 103a.Utilize bar 109a1 etc. with clamping device 107b1 etc. and the bindings such as screw jack 108a1.And, can utilize these screw jack 108a1 etc. and the long limit copper coin 101b of drawer at movable side and the long limit water tank 103b of drawer at movable side are moved along the slab thickness direction.Thus, in the interstage of casting process, temporarily stop the drawing of slab, utilize axle 106a1,106a2 and minor face copper coin 102a and minor face water tank 104a are moved along slab width (long side direction of long limit copper coin 101a, 101b), can in casting manipulations, change thus the width of slab.In addition, when after casting process finishes, safeguarding, utilize screw jack 108a1 etc. and long limit copper coin 101b and long limit water tank 103b are moved in the direction of leaving from long limit copper coin 101a and long limit water tank 103a, then, minor face copper coin 102a, 102b and minor face water tank 104a, 104b are pulled down from axle 106a1,106a2 etc., and minor face copper coin and minor face water tanks that other length is different are installed on axle 106a1,106a2 etc., can change mold thickness by changing these minor face casting die parts thus.Thus, can cast out the different slab of thickness.
In this mold variset, clamping device needs the long limit casting die part of securely clamping and opens wide (rigidity clamping, hard clump) so that long limit casting die part (copper coin and water tank) is not expanded because of the molten steel static pressure (expansive force) in the casting.On the other hand, need to have following function: in the time in casting process, can changing the slab width, weaken long limit clamping force, the surface pressing that acts on the minor face copper coin from growing the limit copper coin is weakened, reduce the frictional force between long limit copper coin and the minor face copper coin, thus so that based on the movement of the minor face casting die part of axle become smooth and easy (Flexible Fixturing, soft clump).In this case, the expansive force and the slab width (width of plate slab) that act on long limit clamping device change accordingly, so need and can adjust accordingly Flexible Fixturing power with width of plate slab by straighforward operation.
In the time in casting process, can changing the slab width, if the state that keeps rigidity to clamp is constant, then exist to make the surperficial impaired of long limit copper coin or produce the bad possibility of action because powerful frictional force causes the axle of slab variable-width device.Therefore, Flexible Fixturing is important function, but owing to be in casting process, to change the slab width, so when the central part that does not solidify slab in mold exists the adjustment of molten steel and Flexible Fixturing power unreliable, exist because overcoming expansive force fully to cause the expansion of slab casting die part to open wide and then produce the possibility of molten steel leakage major accidents such as (splashing).Therefore, need to suitably adjust Flexible Fixturing power.
In addition, in situation about safeguarding, when changing the minor face casting die part in order to change slab thickness, need to carry out the operation that the casting die part expansion of long limit is opened wide by loosening.In addition, foreign matter be clamped in the situation between minor face copper coin and the long limit copper coin and cleaning minor face copper coin and long limit copper coin between situation under, also need to carry out to make by loosening the unlimited operation of long limit casting die part expansion.
The clamping device that possesses as the mold variset is at patent documentation 1(TOHKEMY 2002-66697 communique) in the clamping device put down in writing, possess self-sustaining hydraulic cylinder, disk spring and long limit and start jack.In this self-sustaining hydraulic cylinder, piston element is inserted in the cylinder barrel, the piston portion of piston element contacts with the inner surface of cylinder barrel, compression chamber and pressure-reducing chamber by the both sides that are formed at piston portion in cylinder barrel apply hydraulic pressure, can make pull bar (tie rod) carry out forward-reverse along its long side direction and move.In the situation that pull bar retreats, thereby spring is compressed clamping force is put between the casting die part of long limit.
Yet, in the prior art that patent documentation 1 is put down in writing, in order to make the self-sustaining hydraulic cylinder realize self-retaining function piston portion is inserted in the cylinder barrel, and for make compressed oil from compression chamber and pressure-reducing chamber by utilizing hydraulic pressure that the part expansion of piston portion coupling cylinder barrel and a part is opened wide, so to the machining accuracy of piston and cylinder barrel require high.Therefore, process technology and the qualitative control of the height of requirement and existing product coupling.Therefore, the cost of self-sustaining hydraulic cylinder is extremely expensive.In addition, except this self-sustaining hydraulic cylinder, start jack for replacing minor face casting die part when safeguarding also needs to arrange long limit, thereby need self-sustaining hydraulic cylinder and long limit to start the jack both sides.Therefore, the equipment cost of the prior art is very high.
Summary of the invention
The continuous casting equipment that the object of the present invention is to provide the mold clamping device and use this mold clamping device can reduce cost and the operating cost (running cost) of device integral body, and can prevent sandwiching of dust.
Mold clamping device involved in the present invention, by being linked each other, the long limit casting die part in the continuous casting equipment is assembled into mold, wherein, described continuous casting equipment possesses: the long limit casting die part of fixation side that the formation of arranged opposite is a pair of and the long limit of drawer at movable side casting die part; And the pair of short edges casting die part of arranged opposite between the casting die part of described long limit, described continuous casting equipment is by casting continuously slab to the regional pour steel of being surrounded by described long limit casting die part and described minor face casting die part,
Described mold clamping device is characterised in that this mold clamping device has:
Pull bar, this pull bar connects the long limit casting die part of described fixation side and the long limit of described drawer at movable side casting die part in their opposed direction;
Hydraulic pressure housing, this hydraulic pressure housing are fixed in the long limit of described drawer at movable side casting die part, are inserted into to described pull bar or the liquid-tight property of the first bar that links with this pull bar the inside of this hydraulic pressure housing;
Support, this support are fixed in the long limit of described fixation side casting die part, and are fixed into so that described pull bar does not break away from from the long limit of described drawer at movable side casting die part side;
The first bar that piston, this piston are linked to described pull bar or link with this pull bar is grown the limit casting die part in the mode liquid-tight with respect to the inner surface of described hydraulic pressure housing with respect to described drawer at movable side and is come and gone movement in described hydraulic pressure housing,
The first pressure unit, this first pressure unit apply pressure direction, that be used for carrying out the rigidity clamping that leaves towards from the long limit of described drawer at movable side casting die part to described piston in described hydraulic pressure housing; And
The second pressure unit, this second pressure unit apply pressure direction, that be used for carrying out Flexible Fixturing of growing the limit casting die part towards described drawer at movable side to described piston.
Particularly, the mold clamping device of the first embodiment of the present invention is characterised in that, described the first pressure unit has the first introducing port, to import to the balancing gate pit that comparing with described piston of described hydraulic pressure housing leaned on the long limit of described drawer at movable side casting die part side be used to the hydraulic pressure that carries out the rigidity clamping via this first introducing port
Described the second pressure unit has the second introducing port, will import to the balancing gate pit that comparing with described piston of described hydraulic pressure housing leaned on the opposition side of the long limit of described drawer at movable side casting die part be used to the hydraulic pressure that carries out Flexible Fixturing via this second introducing port.
And then, preferably, the mold clamping device of this first embodiment has the second bar, in described hydraulic pressure housing, for the front surface on surface that the binding as described piston has described pull bar or the first bar, this the second bar is fixed in the rear surface of the opposition side of described front surface, and give prominence to liquid-tight property towards the rear from described hydraulic pressure housing at the rear portion of this second bar
Described pull bar in the described hydraulic pressure housing or the diameter of described the first bar are less than the diameter of described the second bar.
The mold clamping device of the second embodiment specifically of the present invention is characterised in that, described mold clamping device also has: the second bar, in described hydraulic pressure housing, for the front surface on surface that the binding as described piston has described pull bar or the first bar, this the second bar is fixed in the rear surface of the opposition side of described front surface, and give prominence to liquid-tight property towards the rear from described hydraulic pressure housing at the rear portion of this second bar;
The second hydraulic pressure housing, this second hydraulic pressure housing is disposed at the rear of described the first hydraulic pressure housing directly or indirectly;
The second piston, this second piston are arranged in described the second hydraulic pressure housing, come and go mobile in the mode liquid-tight with respect to the inner surface of described the second hydraulic pressure housing with respect to the long limit of described drawer at movable side casting die part in described the second hydraulic pressure housing; And
The 3rd bar, the 3rd bar are fixed in the front surface of the long limit of the described drawer at movable side casting die part side of described the second piston, and insert to liquid-tight property the wall in the place ahead of logical described the second hydraulic pressure housing, and link with described the second bar,
Described the first pressure unit has the first introducing port, will import to the balancing gate pit that comparing with described piston of described hydraulic pressure housing leaned on the long limit of described drawer at movable side casting die part side be used to the hydraulic pressure that carries out the rigidity clamping via this first introducing port,
Described the second pressure unit has the second introducing port, will import to the balancing gate pit that comparing with described the second piston of described the second hydraulic pressure housing leaned on the opposition side of the long limit of described drawer at movable side casting die part be used to the hydraulic pressure that carries out Flexible Fixturing via this second introducing port.
In the mold clamping device of above-mentioned the second embodiment, preferably, bearing be used to the compression area that carries out the pressure that rigidity clamps of piston in the described hydraulic pressure housing is greater than the compression area be used to the pressure that carries out Flexible Fixturing of bearing of the second piston in described the second hydraulic pressure housing.
Preferably, the mold clamping device of the invention described above has the hydraulic control check valve, and this hydraulic control check valve is connected with the balancing gate pit that is applied be used to the pressure that carries out described rigidity clamping of described hydraulic pressure housing.
Continuous casting equipment involved in the present invention is characterised in that, grow in the long limit casting die part of drawer at movable side and fixation side on the slab width of limit casting die part both ends respectively on the upper strata and lower floor two above-mentioned arbitrarily mold clamping devices respectively are set,
Two mold clamping devices on upper strata and two mold clamping devices of lower floor can be controlled respectively described rigidity clamping pressure and Flexible Fixturing pressure independently of each other,
The rigidity clamping pressure of two mold clamping devices of lower floor is higher than the rigidity clamping pressure of two mold clamping devices on upper strata.
According to the present invention, the first pressure unit applies the pressure that clamps be used to carrying out rigidity to the piston in the hydraulic pressure housing, the second pressure unit applies be used to the pressure that carries out Flexible Fixturing the piston in the hydraulic pressure housing, and above-mentioned these pressure are adjusted, can between the casting die part of long limit, at random apply rigidity clamping force and Flexible Fixturing power thus, so can not utilize with expensive equipment simply and structure with versatility applies clamping force.In addition, in the present invention, owing to do not produce the such problem of sandwiching of dust, so can in casting process, stably use the present invention.
Description of drawings
Fig. 1 is the top view that the mold clamping device 10 of the first embodiment of the present invention is shown.
Fig. 2 is the top view that the mold clamping device 11 of the second embodiment of the present invention is shown.
Fig. 3 is the loop diagram that hydraulic circuit is shown.
Fig. 4 is the fragmentary perspective cross sectional view that continuous casting of slab equipment is shown.
Fig. 5 is the top view of schematically illustrated mold clamping state.
Fig. 6 is the fragmentary perspective cross sectional view that the mold clamping state of Fig. 5 is shown.
Description of reference numerals:
1a ... the long limit of fixation side copper coin; 1b ... the long limit of drawer at movable side copper coin; 2a, 2b ... the minor face copper coin; 3a ... the long limit of fixation side water tank; 3b ... the long limit of drawer at movable side water tank; 4a, 4b ... the minor face water tank; 6a, 6b ... axle; 20 ... carrying cylinder; 21,41 ... hydraulic cylinder; 22 ... the hydraulic pressure housing; 30,45 ... piston; 31 ... auxiliary rod; 32 ... mobile jib; 35 ... pull bar; 43 ... the second hydraulic pressure housing; 44 ... bar; 51,52,53,54 ... introducing port.
The specific embodiment
Below, with reference to accompanying drawing embodiments of the present invention are specifically described.Fig. 1 is the top view of mold clamping device that the continuous casting equipment of embodiments of the present invention is shown.Comprise the long limit copper coin 1a of fixation side and long limit water tank 3a long limit casting die part, be configured to opposite each other with the long limit copper coin 1b that comprises drawer at movable side and the long limit casting die part of growing limit water tank 3b, wherein, long limit water tank 3a is fixed in the behind of long limit copper coin 1a and long limit copper coin 1a is cooled off, and long limit water tank 3b is fixed in the behind of long limit copper coin 1b and long limit copper coin 1b is cooled off.And, the pair of short edges casting die part is disposed between above-mentioned long limit copper coin 1a and the long limit copper coin 1b in mode opposite one another, wherein, this pair of short edges casting die part comprises minor face copper coin 2a, 2b and is fixed in minor face water tank 4a, the 4b of the behind of minor face copper coin 2a, 2b.In addition, in the behind of minor face water tank 4a, 4b support plate 5a etc. is installed, the bindings such as axle 6a philosophy and this support plate 5a.And axle 6a etc. makes its bar advance or retreat along long side direction, can change the slab width by the position of change minor face copper coin 2a etc. thus.
Two end portions at the slab width of the long limit water tank 3b of drawer at movable side is provided with mold clamping device 10 up and down two-layerly, and wherein, this mold clamping device 10 links the long limit casting die part of fixation side to be fixed with the long limit of drawer at movable side casting die part.Figure 1 illustrates one of them mold clamping device 10.Carrying cylinder 20 cylindraceous is fixed in the back wall of the long limit water tank 3b of drawer at movable side in its mode that is axially perpendicular to the back wall of the long limit water tank 3b of drawer at movable side, is provided with hydraulic cylinder 21 in the rearward end of this carrying cylinder 20.Hydraulic pressure housing cylindraceous 22 and the carrying cylinder 20 of this hydraulic cylinder 21 is fixed in the rearward end of carrying cylinder 20 coaxially.This hydraulic pressure housing 22 also with its be axially perpendicular to long limit water tank 3b back wall mode and be fixed, thereby the closed seal cavity that forms in its both ends.In this hydraulic pressure housing 22, discoideus piston 30 is configured to slide along the long side direction of hydraulic pressure housing 22, and mobile jib 32 is so that it axially is fixed in the face of the long limit water tank 3b side of piston 30 with the axial consistent mode of hydraulic pressure housing 22.This mobile jib 32 is inserted the wall of mobile jib 32 sides of leading to hydraulic pressure housing 22 and is entered in the carrying cylinder 20.On the other hand, auxiliary rod 31 is so that it axially is fixed in the face of opposition side of the mobile jib 32 of piston 30 with the axial consistent mode of hydraulic pressure housing 22.This auxiliary rod 31 is inserted the wall of auxiliary rod 31 sides of leading to hydraulic pressure housing 22 and is exposed towards the outside of carrying cylinder 20.Insert to this mobile jib 32 and auxiliary rod 31 liquid-tight property the wall of logical hydraulic pressure housing 22, hydraulic pressure is from the introducing port 51 of the both sides that are arranged at piston 30,52 and put in the hydraulic pressure housing 22.The hydraulic pressure of introducing port 51 that puts on auxiliary rod 31 sides of piston 30 is the hydraulic pressure that Flexible Fixturing is used, and the hydraulic pressure of introducing port 52 that puts on mobile jib 32 sides of piston 30 is the hydraulic pressure that rigidity clamps usefulness.The diameter of mobile jib 32 is less than the diameter of auxiliary rod 31, therefore, act on the hydraulic pressure of comparing the space (R1 of balancing gate pit) by mobile jib 32 sides with the piston 30 of hydraulic pressure housing 22 and act on the larger area with respect to piston 30, so can apply larger stress to piston 30 with less pressure.On the other hand, the diameter of auxiliary rod 31 is greater than the diameter of mobile jib 32, therefore, act on the hydraulic pressure of comparing the space (R2 of balancing gate pit) by auxiliary rod 31 sides with the piston 30 of hydraulic pressure housing 22 and act on the less area with respect to piston 30, so can apply less stress to piston 30 with larger pressure.Therefore, the adjustment precision of the stress realized of the adjustment of passing through pressure of the R2 of balancing gate pit is higher.The hydraulic pressure that applies from introducing port 52 applies stress towards auxiliary rod 31 sides to piston 30, and the hydraulic pressure that applies from introducing port 51 applies stress towards mobile jib 32 sides to piston 30.In addition, be provided with dust cover 23 in the end of the opposition side of the long limit water tank 3b of hydraulic pressure housing 22, thus with the partial coverage that stretches out to the outside of hydraulic pressure housing 22 from hydraulic pressure housing 22 of auxiliary rod 31.
And, being provided with flange 33 at the front end of mobile jib 32, this flange 33 and flange 34 are in carrying cylinder 20 interior bindings, and wherein, this flange 34 is arranged at an end of the pull bar 35 that long limit water tank 3b and long limit water tank 3a are connected.The rear side of leading to long limit water tank 3a is inserted in the other end of pull bar 35, and this other end becomes and forms threaded threaded portion 36.The support 38 that the back side of long limit water tank 3a will be fixed in this threaded portion 36 is inserted logical and is further exposed towards the rear side of support 38, and nut 37 screws togather with part from the threaded portion 36 that this support 38 exposes.In addition, pull bar 35 with respect to the border end face of threaded portion 36 and support 38 between clamped packing ring 39, between nut 37 and support 38, clamped packing ring 40, by carrying out fastening to nut 37 and support 38 being fixed in the other end of nut 37, therefore, pull bar 35 is fixed in long limit water tank 3a via support 38.Thus, when when the direction towards the long limit water tank 3b of drawer at movable side spurs pull bar 35, because pull bar 35 is fixed in support 38 by nut 37, so pull bar 35 is not towards the long limit of drawer at movable side water tank 3b side shifting.In addition, although pull bar 35 constitutes minute body component that links by flange 33,34 with mobile jib 32 in the above-described embodiment, be not limited to this, also pull bar 35 and piston 30 directly can be linked.
Next, the action of the clamping device of the present embodiment that consists of in the above-described manner described.In Fig. 1, pull bar 35 links (fixing) via part (threaded portion 36, support 38, packing ring 39, packing ring 40) and nut 37 with the long limit water tank 3a of fixation side.In comparing by the R1 of balancing gate pit of mobile jib 32 sides with the piston 30 of hydraulic pressure housing 22, be applied with the hydraulic pressure of rigidity clamping pressure p1 via introducing port 52.Thus, owing to piston 30 moves towards the direction of leaving from long limit water tank 3b, so the long limit water tank 3b of drawer at movable side relatively moves towards fixation side length limit water tank 3a in the mode along the pull bar 35 that links with piston 30 via mobile jib 32.Fig. 3 shows this hydraulic circuit.The solenoid A1 of direction switch valve SV1 is connected, direction setting is become V11, the rigidity clamping is put on than piston 30 R1 of balancing gate pit on the front via hydraulic control check valve V3 with pressure.At this moment, direction switch valve SV2 is in the neutral position, is communicated with atmospheric pressure via exhaust end T by the pressure in the R2 of balancing gate pit at rear than piston 30.Security Countermeasures that hydraulic control check valve V3 takes when breaking as pipe arrangement and be arranged at hydraulic cylinder.In this case, the stress corresponding with the rigidity clamping pressure that puts on the R1 of balancing gate pit puts between long limit water tank 3a and the long limit water tank 3b long limit water tank 3a and long limit water tank 3b direction near each other via pull bar 35, thereby forms the rigidity clamped condition.
On the other hand, switch in the situation of Flexible Fixturing state at the state that will grow between limit water tank 3a and the long limit water tank 3b in order to carry out the change operation of slab width, the solenoid A2 connection with direction switch valve SV2 switches to the V21 side with direction.Direction switch valve SV1 keeps intact constant.So Flexible Fixturing pressure puts on via introducing port 51 than the balancing gate pit R2 of the piston 30 in the hydraulic fluid cylinder pressure 22 by the rear.Thus, the R1 of balancing gate pit is applied the rigidity clamping pressure, the R2 of balancing gate pit is applied Flexible Fixturing pressure, and on respect to piston 30 opposite directions stress application, so become the value of gained after from the rigidity clamping force, deducting Flexible Fixturing power in the power of the direction pulling pull bar 35 that leaves from long limit water tank 3b (will grow limit water tank 3b towards the power of long limit water tank 3a extruding) via piston 30, thereby clamping force correspondingly reduces, the power of long limit copper coin clamping minor face copper coin reduces, thus so that the reduction of frictional force between the two.Thus, can utilize axle 6a etc. that the minor face copper coin is moved at the slab width.
In addition, when in the situation about safeguarding when changing the minor face casting die part and change slab thickness, the solenoid B1 of direction switch valve SV1 is connected, solenoid A1 is cut off.In addition, the solenoid A2 with direction switch valve SV2 cuts off.So the direction of direction switch valve SV1 is switched to the side towards V13.Thus, the R2 of balancing gate pit is applied rigidity clamp and use pressure, the pressure of the R1 of balancing gate pit becomes atmospheric pressure, can make pull bar 35 grow limit water tank 3b side with respect to drawer at movable side to greatest extent and advance or retreat, thereby can change the minor face casting die part.
And then, although under being in situation about safeguarding, do not carry out slab thickness change operation but clean when waiting, with all solenoids cut-outs of direction switch valve SV1 and direction switch valve SV2.So direction switch valve SV1 is switched to the neutral position of V12, direction switch valve SV2 is switched to the neutral position of V22, so that the R1 of balancing gate pit, R2 keep this pressure state not long ago.
In the present embodiment, can only utilize the long-rod type hydraulic cylinder and will grow the limit casting die part and clamp each other, and can carry out rigidity clamping, Flexible Fixturing, open wide the operation of carrying out the change of slab thickness by making the casting die part expansion of long limit.Therefore, need not screw jack, CD-ROM drive motor, position detector and control device, thereby can significantly reduce equipment cost and operating cost.In addition, also be difficult to produce the unfavorable condition that is caused by sandwiching of dust.And then, owing to do not use spring, so need not to carry out the fixing of spring, operation is set becomes easy thereby make.And then, in the present embodiment, owing to obtaining clamping force based on pressure-acting in the stress of piston 30, so even the width (length on the slab thickness direction) that causes the minor face casting die part because of the thermal expansion of minor face casting die part changes with respect to the width dimensions at casting initial stage, and cause thus the forward-reverse position of pull bar 35 to change, because clamping force depends on pressure, so as long as clamping force is remained constant, just can not be subject to the impact of the thermal expansion of minor face copper coin.And then, in the present embodiment, can make the casting die part expansion of the long limit of drawer at movable side and open wide, in addition, the pull bar 35 that need not control device but direction by direction switch valve is switched can stop in position arbitrarily, and can make the mobile emergent stopping of pull bar 35 under the state that keeps this pressure dependence not long ago.
In the present embodiment, the diameter of bar 31 that is applied with the R2 of the balancing gate pit side of Flexible Fixturing pressure is set as diameter greater than the bar 32 of the R1 of the balancing gate pit side that is applied with the rigidity clamping pressure, reduce thus the compression area of Flexible Fixturing pressure, so can improve the adjustment precision of Flexible Fixturing pressure.In addition, owing to hydraulic control check valve V3 being connected with the R1 of balancing gate pit and it being equipped on hydraulic cylinder, so expand each other unlimited even when the hydraulic piping explosion, also can prevent long limit casting die part.In addition, when carrying out Flexible Fixturing, because the R1 of balancing gate pit is applied with the rigidity clamping pressure, and the R2 of balancing gate pit is applied with Flexible Fixturing pressure, so the pressure differential of two R1 of balancing gate pit, R2 reduces, the leakage rate of the pressure from the R1 of balancing gate pit towards the R2 of balancing gate pit reduces, the degree that is able to ignore.
Like this, in the present embodiment, setup cost and operating cost reduce, simple structure, and security is improved.In addition, need not the expensive parts such as screw jack, spring assembly, position detector.Have in the present embodiment following advantage: although use the double rod type hydraulic cylinder, they can belong to the same bar, and then, owing to need not two bars are carried out special processing, be arranged in the existing continuous casting equipment so can use widely.
In the present embodiment, divide in the position, two places of the both sides of slab width and be provided with up and down above-mentioned clamping device two-layerly.When the distance from the upper end of the copper coin of mold to liquid steel level (meniscus) being made as 100mm, the height of copper coin being made as 900mm, the height that starts from meniscus the molten steel is made as 1020mm, slab (slab) width is made as 2300mm, the density γ of molten steel is made as 7.00kg/m
3The time, whole molten steel static pressure reaches per 1 mole of 8.375kg.If center of gravity and the distance L between the lower side shaft 2 that the center of gravity that the clamping device on upper strata (upper side shaft) is 565mm with the up and down distance L of the clamping device (lower side shaft) of lower floor, act on the molten steel static pressure of copper coin is 435mm with the distance L between the upper side shaft 1, act on the molten steel static pressure of copper coin are 130mm, then for the molten steel static pressure (expansive force) of the clamp shaft that acts on two groups of upsides, two groups of downsides, each axle of upper side shaft reaches 964kg, and each axle of lower side shaft reaches 3224kg.If safety coefficient is made as 1.5, then going up axis clamping power is 1.445kg, and the lower shaft clamping force is 4.836kg.And, the frictional force when on the basis of upper axis clamping power, further applying the sliding friction of slab width when change minor face copper coin, the power of this moment reaches 1750kg by calculating as can be known.Since rubbing surface with on be coupling closely, only act on axle so be made as frictional force.And then, based on the lower end of the copper coin lever principle as fulcrum, when the distance between copper coin lower end and the lower side shaft is made as 10mm, obtain based on the downside clamping force to open load towards the upside expansion be 115kg.Therefore, by above-mentioned 3 kinds of load are carried out add operation as can be known, need the rigidity clamping force of 3310kg at upper side shaft, need the rigidity clamping force of 4836kg at lower side shaft.Therefore, by estimation as can be known: the upper required rigidity clamping force of side shaft is 3500kg, and the required rigidity clamping force of lower side shaft is 5000kg.And if the diameter of piston 30 is made as 100mm, the diameter of bar 32 is made as 56mm, the diameter of bar 31 is made as 71mm, then for the pressure in the pressure housing of hydraulic cylinder, (when rigidity clamps) reaches 65kg/cm at upper side shaft when common running
2About and reach 93kg/cm at lower side shaft
2About, when change in casting process during width (during Flexible Fixturing) reach 65kg/cm according to the difference of the thickness of slab width at upper side shaft
2～87kg/cm
2About and reach 35kg/cm at lower side shaft
2～99kg/cm
2About.For the admissible error of Flexible Fixturing pressure at this moment, be 8kg/cm for upper side shaft
2～10kg/cm
2About, be 13kg/cm for lower side shaft
2～18kg/cm
2About.If adjust pressure by common pressure-reducing valve when carrying out the rigidity clamping, and adjust pressure by the proportional pressure-reducing valve of Remote Control Automatic setting when carrying out Flexible Fixturing, then the pressure error of the combination of this common pressure-reducing valve and proportional pressure-reducing valve is about 5%.Therefore, this pressure error is less than the admissible error of above-mentioned Flexible Fixturing pressure, so can assert that this is safe.In addition, when carrying out Flexible Fixturing, the R1 of balancing gate pit is applied with above-mentioned rigidity clamping pressure, the R2 of balancing gate pit is applied with Flexible Fixturing pressure, but the difference of above-mentioned pressure is all less at upper side shaft and lower side shaft.Therefore, less via the leakage of the pressure of piston 30.
Next, with reference to Fig. 2 the mold clamping device 11 of the second embodiment of the present invention is described.In the present embodiment, hydraulic cylinder 41 has hydraulic pressure housing 22 and the second hydraulic pressure housing 43.Auxiliary rod 31 is fixed in the face of opposition side of the mobile jib 32 of piston 30 coaxially with piston 30 in hydraulic pressure housing 22, bar 44 is fixed in this auxiliary rod 31 in the mode that links coaxially with this auxiliary rod 31 in dust cover 42.The flange 56 of the second hydraulic pressure housing 43 links with the flange of bar 44 sides of dust cover 42 55.Bar 44 liquid-tight property ground connect the wall of flange 56 sides of this second hydraulic pressure housing 43, and bar 44 links coaxially with the piston 45 that is arranged in the second hydraulic pressure housing 43.The part of comparing the opposition side of rod 44 with piston 45 of the inside of the second hydraulic pressure housing 43 becomes the R2 of balancing gate pit, and hydraulic pressure puts on the R2 of this balancing gate pit via the introducing port 54 that is arranged at the second hydraulic pressure housing 43.In addition, from the diameter of piston 30, deduct mobile jib 32 diameter and the area (compression area of the R1 of balancing gate pit) of part greater than the area (compression area of the R2 of balancing gate pit) of the part suitable with the diameter of piston 45.Because other structure is identical with structure in the first embodiment, also description is omitted so identical parts are marked same Reference numeral.Hydraulic circuit also can use hydraulic circuit shown in Figure 3.
In the present embodiment, when carrying out the rigidity clamping, the rigidity clamping pressure is put in the R1 of balancing gate pit via introducing port 53.Be atmospheric pressure in the R2 of balancing gate pit.On the other hand, when carrying out Flexible Fixturing, the pressure in the R1 of balancing gate pit is kept intact constant, and Flexible Fixturing pressure is put in the R2 of balancing gate pit via introducing port 54.Thus, identical with the first embodiment, also can carry out in the present embodiment the maintenances such as rigidity clamping, Flexible Fixturing, the change of minor face casting die part, cleaning.In addition, because the compression area of piston 45 is less than the compression area of piston 30, so can also finely tune the Flexible Fixturing pressure of hydraulic cylinder.And present embodiment also can play the effect identical with the first embodiment.
And then, in the present embodiment, in hydraulic pressure housing 22, carry out applying of rigidity clamping force, in the second hydraulic pressure housing 43, carry out applying of Flexible Fixturing pressure, and hydraulic pressure housing 22 separates fully with the second hydraulic pressure housing 43, so can thoroughly prevent the impact to each other that caused by internal leakage.But present embodiment need to arrange the second hydraulic pressure housing 43, thereby compares with the first embodiment, at cost and the space is set is disadvantageous aspect these.
In the present invention, generally, certainly above-mentioned mold clamping device 10,11 is arranged at the both ends on the slab width of drawer at movable side casting die part and fixation side casting die part, and is arranged to these long limit casting die parts two-layer up and down.And, the hydraulic piping of each device is arranged to: can utilize two mold clamping devices on upper strata and the so different system of two mold clamping devices of lower floor to control rigidity clamping pressure and the Flexible Fixturing pressure that the hydraulic pressure housing is applied.Thus, preferably, make the rigidity clamping pressure of the mold clamping device of lower floor be higher than the rigidity clamping pressure of the mold clamping device on upper strata, thereby make the clamping pressure of the bottom of mold be higher than the clamping pressure on top.There is molten steel in the central part that does not solidify slab in mold, and its hydrostatic pressure is larger more on the lower.Therefore, mold is applied larger more on the lower expansion (bulging) stress, thereby make on the unlimited direction of long limit casting die part expansion these long limit casting die part stress applications.Therefore, as the present invention, the clamping force of the bottom by making long limit casting die part is higher than the clamping force on top, can suppress this swelling, thereby the accident such as can prevent from reliably splashing.
Utilize possibility on the industry
According to the present invention, the rigidity that can utilize structure simple and that have a versatility to carry out the mold of continuous casting equipment clamps and Flexible Fixturing, thereby the high efficiency of continuous casting operation has been made great contribution.
Claims (7)
1. mold clamping device, by being linked each other, the long limit casting die part in the continuous casting equipment is assembled into mold, wherein, described continuous casting equipment possesses: the long limit casting die part of fixation side that the formation of arranged opposite is a pair of and the long limit of drawer at movable side casting die part; And the pair of short edges casting die part of arranged opposite between the casting die part of described long limit, described continuous casting equipment is by casting continuously slab to the regional pour steel of being surrounded by described long limit casting die part and described minor face casting die part,
Described mold clamping device is characterised in that to have:
Pull bar, this pull bar connects the long limit casting die part of described fixation side and the long limit of described drawer at movable side casting die part in their opposed direction;
Hydraulic pressure housing, this hydraulic pressure housing are fixed in the long limit of described drawer at movable side casting die part, are inserted into to described pull bar or the liquid-tight property of the first bar that links with this pull bar the inside of this hydraulic pressure housing;
Support, this support are fixed in the long limit of described fixation side casting die part, and are fixed into so that described pull bar does not break away from from the long limit of described drawer at movable side casting die part side;
The first bar that piston, this piston are linked to described pull bar or link with this pull bar is grown the limit casting die part in the mode liquid-tight with respect to the inner surface of described hydraulic pressure housing with respect to described drawer at movable side and is come and gone movement in described hydraulic pressure housing,
The first pressure unit, this first pressure unit apply pressure direction, that be used for carrying out the rigidity clamping that leaves towards from the long limit of described drawer at movable side casting die part to described piston in described hydraulic pressure housing; And
The second pressure unit, this second pressure unit apply pressure direction, that be used for carrying out Flexible Fixturing of growing the limit casting die part towards described drawer at movable side to described piston.
2. mold clamping device according to claim 1 is characterized in that,
Described the first pressure unit has the first introducing port, will import to the balancing gate pit that comparing with described piston of described hydraulic pressure housing leaned on the long limit of described drawer at movable side casting die part side be used to the hydraulic pressure that carries out the rigidity clamping via this first introducing port,
Described the second pressure unit has the second introducing port, will import to the balancing gate pit that comparing with described piston of described hydraulic pressure housing leaned on the opposition side of the long limit of described drawer at movable side casting die part be used to the hydraulic pressure that carries out Flexible Fixturing via this second introducing port.
3. mold clamping device according to claim 2 is characterized in that,
Described mold clamping device also has the second bar, in described hydraulic pressure housing, for the front surface on surface that the binding as described piston has described pull bar or the first bar, this the second bar is fixed in the rear surface of the opposition side of described front surface, give prominence to liquid-tight property towards the rear from described hydraulic pressure housing at the rear portion of this second bar
Described pull bar in the described hydraulic pressure housing or the diameter of described the first bar are less than the diameter of described the second bar.
4. mold clamping device according to claim 1 is characterized in that,
Described mold clamping device also has:
The second bar, in described hydraulic pressure housing, for the front surface on surface that the binding as described piston has described pull bar or the first bar, this second bar is fixed in the rear surface of the opposition side of described front surface, and give prominence to liquid-tight property towards the rear from described hydraulic pressure housing at the rear portion of this second bar;
The second hydraulic pressure housing, this second hydraulic pressure housing is disposed at the rear of described the first hydraulic pressure housing directly or indirectly;
The second piston, this second piston are arranged in described the second hydraulic pressure housing, come and go mobile in the mode liquid-tight with respect to the inner surface of described the second hydraulic pressure housing with respect to the long limit of described drawer at movable side casting die part in described the second hydraulic pressure housing; And
The 3rd bar, the 3rd bar are fixed in the front surface of the long limit of the described drawer at movable side casting die part side of described the second piston, and insert to liquid-tight property the wall in the place ahead of logical described the second hydraulic pressure housing, and link with described the second bar,
Described the first pressure unit has the first introducing port, will import to the balancing gate pit that comparing with described piston of described hydraulic pressure housing leaned on the long limit of described drawer at movable side casting die part side be used to the hydraulic pressure that carries out the rigidity clamping via this first introducing port,
Described the second pressure unit has the second introducing port, will import to the balancing gate pit that comparing with described the second piston of described the second hydraulic pressure housing leaned on the opposition side of the long limit of described drawer at movable side casting die part be used to the hydraulic pressure that carries out Flexible Fixturing via this second introducing port.
5. mold clamping device according to claim 4 is characterized in that,
Bearing be used to the compression area that carries out the pressure that rigidity clamps of piston in the described hydraulic pressure housing is greater than the compression area be used to the pressure that carries out Flexible Fixturing of bearing of the second piston in described the second hydraulic pressure housing.
6. each described mold clamping device is characterized in that according to claim 1～5,
Described mold clamping device has the hydraulic control check valve, and this hydraulic control check valve is connected with the balancing gate pit that is applied be used to the pressure that carries out described rigidity clamping of described hydraulic pressure housing.
7. a continuous casting equipment is characterized in that,
Grow in the long limit casting die part of drawer at movable side and fixation side on the slab width of limit casting die part both ends respectively on the upper strata and lower floor each described mold clamping device in two the claims 1 to 6 respectively is set,
Two mold clamping devices on upper strata and two mold clamping devices of lower floor can be controlled respectively described rigidity clamping pressure and Flexible Fixturing pressure independently of each other,
The rigidity clamping pressure of two mold clamping devices of lower floor is higher than the rigidity clamping pressure of two mold clamping devices on upper strata.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-103899 | 2012-04-27 | ||
| JP2012103899A JP5944220B2 (en) | 2012-04-27 | 2012-04-27 | Mold clamp device and continuous casting equipment using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103372635A true CN103372635A (en) | 2013-10-30 |
| CN103372635B CN103372635B (en) | 2015-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320216596 Withdrawn - After Issue CN203209647U (en) | 2012-04-27 | 2013-04-25 | Mold-casting clamping device and continuous casting equipment using same |
| CN201310147996.4A Active CN103372635B (en) | 2012-04-27 | 2013-04-25 | Mold clamping device and use the continuous casting equipment of this mold clamping device |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320216596 Withdrawn - After Issue CN203209647U (en) | 2012-04-27 | 2013-04-25 | Mold-casting clamping device and continuous casting equipment using same |
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| Country | Link |
|---|---|
| JP (1) | JP5944220B2 (en) |
| CN (2) | CN203209647U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI639475B (en) * | 2016-02-02 | 2018-11-01 | 新日鐵住金股份有限公司 | Detection apparatus for bend of slab and detection method for bend of slab |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5944220B2 (en) * | 2012-04-27 | 2016-07-05 | スチールプランテック株式会社 | Mold clamp device and continuous casting equipment using the same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5322112A (en) * | 1992-03-04 | 1994-06-21 | Sumitomo Heavy Industries, Ltd. | Casting-thickness variable mold for continuous casting |
| CN1251061A (en) * | 1997-03-28 | 2000-04-19 | Ag工业公司 | Dynamic clamping system for continuous casting system |
| CN1966183A (en) * | 2005-09-14 | 2007-05-23 | 东芝机械株式会社 | Die clamping system |
| CN102223967A (en) * | 2008-11-21 | 2011-10-19 | 诺尔斯海德公司 | Casting equipment for the casting of sheet ingot |
| CN203209647U (en) * | 2012-04-27 | 2013-09-25 | 钢铁普蓝特克股份有限公司 | Mold-casting clamping device and continuous casting equipment using same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6056142U (en) * | 1983-09-24 | 1985-04-19 | 川崎製鉄株式会社 | Continuous casting mold long side clamp release device |
| JPH0284232A (en) * | 1988-07-26 | 1990-03-26 | Sumitomo Metal Ind Ltd | Device for clamping assemble mold for continuous casting |
-
2012
- 2012-04-27 JP JP2012103899A patent/JP5944220B2/en active Active
-
2013
- 2013-04-25 CN CN 201320216596 patent/CN203209647U/en not_active Withdrawn - After Issue
- 2013-04-25 CN CN201310147996.4A patent/CN103372635B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5322112A (en) * | 1992-03-04 | 1994-06-21 | Sumitomo Heavy Industries, Ltd. | Casting-thickness variable mold for continuous casting |
| CN1251061A (en) * | 1997-03-28 | 2000-04-19 | Ag工业公司 | Dynamic clamping system for continuous casting system |
| CN1966183A (en) * | 2005-09-14 | 2007-05-23 | 东芝机械株式会社 | Die clamping system |
| CN102223967A (en) * | 2008-11-21 | 2011-10-19 | 诺尔斯海德公司 | Casting equipment for the casting of sheet ingot |
| CN203209647U (en) * | 2012-04-27 | 2013-09-25 | 钢铁普蓝特克股份有限公司 | Mold-casting clamping device and continuous casting equipment using same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI639475B (en) * | 2016-02-02 | 2018-11-01 | 新日鐵住金股份有限公司 | Detection apparatus for bend of slab and detection method for bend of slab |
| US11666965B2 (en) | 2016-02-02 | 2023-06-06 | Nippon Steel Corporation | Slab warpage detection apparatus and method of detecting warpage of slab |
Also Published As
| Publication number | Publication date |
|---|---|
| CN203209647U (en) | 2013-09-25 |
| CN103372635B (en) | 2015-07-29 |
| JP5944220B2 (en) | 2016-07-05 |
| JP2013230487A (en) | 2013-11-14 |
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