CN103372635B - Mold clamping device and use the continuous casting equipment of this mold clamping device - Google Patents
Mold clamping device and use the continuous casting equipment of this mold clamping device Download PDFInfo
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- CN103372635B CN103372635B CN201310147996.4A CN201310147996A CN103372635B CN 103372635 B CN103372635 B CN 103372635B CN 201310147996 A CN201310147996 A CN 201310147996A CN 103372635 B CN103372635 B CN 103372635B
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Abstract
The invention provides mold clamping device and use the continuous casting equipment of this mold clamping device.Hydraulic pressure housing (22) is fixed on long limit water tank (3b), and the bar (32) linked with pull bar (35) is inserted into the inside of hydraulic pressure housing fluid tightly.The other end of pull bar (35) in the mode do not departed from towards long limit water tank (3b) side engaging in the support (38) being fixed on long limit water tank (3a).Piston (30) is arranged to move in hydraulic pressure housing (22), is fixed with bar (32) at the front surface of piston.Be fixed with bar (31) in the rear surface of piston (30), the rear portion of bar (31) is given prominence to from hydraulic pressure housing (22) is fluid tight towards the rear.Hydraulic pressure for rigid grasp imports to the balancing gate pit (R1) of hydraulic pressure housing (22), and the hydraulic pressure for Flexible Fixturing imports to balancing gate pit (R2).Thereby, it is possible to reduce cost and the operating cost of device entirety, and sandwiching of dust can be prevented.
Description
Technical field
The present invention relates to mold clamping device and use the continuous casting equipment of this mold clamping device, utilize long a pair limit casting die part arranged opposite and in the same way the pair of short edges casting die part between this pair long limit casting die part arranged opposite in the continuous casting equipment in casting cross section forming rectangle, this long limit casting die part is fixed each other with state minor face casting die part is held between the casting die part of long limit by above-mentioned mold clamping device.
Background technology
Utilize converter refining and the molten steel obtained, be stored in casting ladle and carried by towards continuous casting equipment, and then be injected in the mold of continuous casting equipment, cooling in this mold also forms solidified shell at periphery, then, therein containing under the state of molten steel, pull out not solidifying the bottom of slab from mold downwards.And, above-mentioned slab of not solidifying is supported comprising multiple Gun Gun district (roller zone), and make by spraying cooling water from nozzle above-mentionedly not solidify slab and cool further, do not solidify after slab solidifies completely above-mentioned, carry out cutting off with the interval of the suitable length on long side direction and form slab.Like this, in continuous casting equipment, molten steel is injected in mold continuously, and makes this molten steel solidify continuously and form slab.
In this continuous casting equipment, because slab is formed as tabular (slab) usually, and its cross section is formed as rectangle, contact and the long limit copper coin that this face is cooled so mold is configured to comprise with the face of the long side of slab, and contact and the minor face copper coin that this face is cooled with the face of the short brink of slab, and long a pair limit copper coin is configured to opposite one another, and between these long limit copper coins, pair of short edges copper coin is configured to opposite one another, molten steel is injected into by these long limit copper coins and minor face copper coin the region that surrounds, be cast as the slab of rectangular in cross-section thus.
Further, in existing mold, accordingly minor face copper coin can be replaced with the different copper coin of its minor face width from the cross sectional shape of the slab as foudry line.That is, by changing interval between the copper coin of long limit and change the different copper coin of configuration bond length between this long limit copper coin, the thickness of slab can be changed.
Fig. 4 is the stereogram of the vicinity of the mold of this continuous casting equipment, by one Partial Resection being illustrated it is inner.Fig. 5 is the top view of the essential structure schematically showing mold, and Fig. 6 schematically shows the stereogram extracting mold from the state of Fig. 4 out.Fixation side long limit copper coin 101a and drawer at movable side long limit copper coin 101b is arranged opposite, be provided with the fixation side long limit water tank 103a that this fixation side long limit copper coin 101a is cooled in the behind of fixation side long limit copper coin 101a, be provided with the drawer at movable side long limit water tank 103b that this drawer at movable side long limit copper coin 101b is cooled in the behind of drawer at movable side long limit copper coin 101b.Between this long limit copper coin 101a with long limit copper coin 101b, be configured with minor face copper coin 102a and minor face copper coin 102b in opposed mode, be also respectively arranged with minor face water tank 104a, 104b that minor face copper coin 102a, 102b are cooled in the behind of these minor face copper coins 102a, 102b.Towards by these long limit copper coin 101a, 101b and minor face copper coin 102a, 102b the casting space pour steel of rectangle of surrounding, molten steel is cooled by long limit copper coin 101a, 101b and minor face copper coin 102a, 102b, and molten steel solidifies at periphery and forms solidified shell, downward from mold this is not solidified to slab 110 and carries out drawing in this condition.Make this slab 110 produce flexural deformation by comprising multiple Gun111Gun district, and this this slab 110 is guided to level.Within this period, spray cooling water to cool slab 110 from the nozzle be configured between roller 111, thus slab 110 is solidified completely.After solidifying completely, cut off slab with the length specified, and the slab after cutting off towards subsequent handling conveying.
For the minor face mold comprising minor face copper coin 102a and minor face water tank 104a, utilize bilevel axle 106a1,106a2 by above-mentioned minor face mold supporting for can move along slab width.In addition, for minor face copper coin 102b and minor face water tank 104b, bilevel axle (not shown in the diagram) is utilized to be supported as can move along slab width too.And, divide at the back side of drawer at movable side long limit copper coin 101b and long limit water tank 103b and slab width is provided with two stack clamping device 107b1,107b2,107b3,107b4 up and down two-layerly, the screw jack 108a1 corresponding with these clamping devices, 108a2,108a3,108a4(do not illustrate 108a2,108a4) be arranged at the back side of fixation side long limit copper coin 101a and long limit water tank 103a.Utilize bar 109a1 etc. by clamping device 107b1 etc. and the links such as screw jack 108a1.Further, these screw jack 108a1 etc. can be utilized and drawer at movable side long limit copper coin 101b and drawer at movable side long limit water tank 103b is moved along slab thickness direction.Thus, in the interstage of casting process, the drawing of temporary transient stopping slab, utilize axle 106a1,106a2 and minor face copper coin 102a and minor face water tank 104a is moved along the slab width long side direction of copper coin 101a, 101b (long limit), the width of slab can be changed thus in casting manipulations.In addition, when safeguarding after terminating at casting process, utilize screw jack 108a1 etc. and the direction that long limit copper coin 101b and long limit water tank 103b is leaving from long limit copper coin 101a and long limit water tank 103a is moved, 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 coins different for other length and minor face water tank being installed on axle 106a1,106a2 etc., mold thickness can being changed by changing these minor face casting die parts thus.Thereby, it is possible to cast out the different slab of thickness.
In this mold variset, clamping device needs to clamp securely long limit casting die part expand unlimited (rigid grasp, hard clump) to make long limit casting die part (copper coin and water tank) not because of the molten steel static pressure (expansive force) in casting.On the other hand, need that there is following function: when slab width can be changed in casting process, weaken long limit clamping force, the surface pressing acting on minor face copper coin from long limit copper coin is weakened, reduce the frictional force between long limit copper coin and minor face copper coin, the movement based on the minor face casting die part of axle is made to become smooth and easy (Flexible Fixturing, soft clump) thus.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 can adjust Flexible Fixturing power by straighforward operation accordingly with width of plate slab.
When slab width can be changed in casting process, if the state of maintaining rigidness clamping is constant, then exists and make the surface damage of long limit copper coin or cause because of powerful frictional force the axle of slab variable-width device to produce the bad possibility of action.Therefore, Flexible Fixturing is important function, but owing to being change slab width in casting process, so when the central part not solidifying slab in mold exists molten steel and the adjustment of Flexible Fixturing power is unreliable, exist and cause slab casting die part to expand the possibility of opening wide and then producing the major accidents such as molten steel leakage (splashing) because expansive force cannot be overcome completely.Therefore, need suitably to adjust Flexible Fixturing power.
In addition, when safeguarding, when in order to change slab thickness change minor face casting die part time, need the operation carrying out making by loosening the casting die part expansion of long limit to open wide.In addition, when foreign matter is clamped between minor face copper coin and long limit copper coin and when cleaning between minor face copper coin and long limit copper coin, also need the operation carrying out making the casting die part expansion of long limit open wide by loosening.
As the clamping device that mold variset possesses, at patent document 1(Japanese Unexamined Patent Publication 2002-66697 publication) described in clamping device in, possess self-sustaining hydraulic cylinder, disk spring and long limit and start jack.In this self-sustaining hydraulic cylinder, piston element is inserted in cylinder barrel, the piston portion of piston element contacts with the inner surface of cylinder barrel, by applying hydraulic pressure towards the compression chamber being formed at the both sides of piston portion in cylinder barrel and pressure-reducing chamber, pull bar (tie rod) can be made to carry out forward-reverse along its long side direction and to move.When pull bar retreats, spring is compressed thus clamping force is put between the casting die part of long limit.
But, in the prior art described in patent document 1, in order to self-sustaining hydraulic cylinder can be made to realize self-retaining function, piston portion is inserted in cylinder barrel, and utilize hydraulic pressure that the part of mating with the piston portion of a part of cylinder barrel is expanded to open wide to make compressed oil pass through from compression chamber with pressure-reducing chamber, so high to the requirement of the machining accuracy of piston and cylinder barrel.Therefore, process technology and the qualitative control of the height mated with existing product is required.Therefore, the cost of self-sustaining hydraulic cylinder is extremely expensive.In addition, except this self-sustaining hydraulic cylinder, also needing, long limit is set start jack to change minor face casting die part when safeguarding, thus need self-sustaining hydraulic cylinder and long limit to start jack both sides.Therefore, the equipment cost of the prior art is very high.
Summary of the invention
The object of the present invention is to provide mold clamping device and use the continuous casting equipment of this mold clamping device, cost and the operating cost (running cost) of device entirety can be reduced, and sandwiching of dust can be prevented.
Mold clamping device involved in the present invention, mold is assembled into by being linked each other by the long limit casting die part in continuous casting equipment, wherein, described continuous casting equipment possesses: the fixation side that formation arranged opposite is a pair long limit casting die part and drawer at movable side long limit casting die part; And the pair of short edges casting die part between the casting die part of described long limit arranged opposite, described continuous casting equipment passes through to cast slab continuously to the region pour steel of being surrounded by described long limit casting die part and described minor face casting die part,
The feature of described mold clamping device is, this mold clamping device has:
Pull bar, this pull bar is through on their opposed direction with described drawer at movable side long limit casting die part by long for described fixation side limit casting die part;
Hydraulic pressure housing, this hydraulic pressure housing is fixed on described drawer at movable side long limit casting die part, and described pull bar or the first bar linked with this pull bar are inserted into the inside of this hydraulic pressure housing fluid tightly;
Support, this support is fixed on described fixation side long limit casting die part, and is fixed into described pull bar is not departed from from casting die part side, described drawer at movable side long limit;
Piston, the first bar that this piston is linked to described pull bar or links with this pull bar, reciprocates relative to described drawer at movable side long limit casting die part in the mode liquid-tight relative to the inner surface of described hydraulic pressure housing in described hydraulic pressure housing,
First pressure unit, this first pressure unit in described hydraulic pressure housing to described piston apply towards the direction left from described drawer at movable side long limit casting die part, for carrying out the pressure of rigid grasp; And
Second pressure unit, this second pressure unit to described piston apply towards the direction of described drawer at movable side long limit casting die part, for carrying out the pressure of Flexible Fixturing.
Specifically, the feature of the mold clamping device of the first embodiment of the present invention is, described first pressure unit has the first introducing port, via this first introducing port the hydraulic pressure being used for carrying out rigid grasp imported to described hydraulic pressure housing compared with described piston by the balancing gate pit of casting die part side, described drawer at movable side long limit
Described second pressure unit has the second introducing port, via this second introducing port the hydraulic pressure being used for carrying out Flexible Fixturing imported to described hydraulic pressure housing compared with described piston by the balancing gate pit of the opposition side of described drawer at movable side long limit casting die part.
And then, preferably, the mold clamping device of this first embodiment has the second bar, in described hydraulic pressure housing, for the front surface being linked with the surface of described pull bar or the first bar as described piston, this the second bar is fixed on the rear surface of the opposition side of described front surface, and the rear portion of this second bar is given prominence to from described hydraulic pressure housing is fluid tight towards the rear
The diameter of the described pull bar in described hydraulic pressure housing or described first bar is less than the diameter of described second bar.
The feature of the mold clamping device of the second embodiment specifically of the present invention is, described mold clamping device also has: the second bar, in described hydraulic pressure housing, for the front surface being linked with the surface of described pull bar or the first bar as described piston, this the second bar is fixed on the rear surface of the opposition side of described front surface, and the rear portion of this second bar is given prominence to from described hydraulic pressure housing is fluid tight towards the rear;
Second hydraulic pressure housing, this second hydraulic pressure housing is configured at the rear of described first hydraulic pressure housing directly or indirectly;
Second piston, this second piston is arranged in described second hydraulic pressure housing, reciprocates in described second hydraulic pressure housing in the mode liquid-tight relative to the inner surface of described second hydraulic pressure housing relative to described drawer at movable side long limit casting die part; And
3rd bar, the 3rd bar is fixed on the front surface of the casting die part side, described drawer at movable side long limit of described second piston, inserts the wall in the front of described second hydraulic pressure housing fluid tightly, and links with described second bar,
Described first pressure unit has the first introducing port, via this first introducing port, the hydraulic pressure being used for carrying out rigid grasp is imported to described hydraulic pressure housing compared with described piston by the balancing gate pit of casting die part side, described drawer at movable side long limit,
Described second pressure unit has the second introducing port, via this second introducing port, the hydraulic pressure being used for carrying out Flexible Fixturing is imported to described second hydraulic pressure housing compared with described second piston by the balancing gate pit of the opposition side of described drawer at movable side long limit casting die part.
In the mold clamping device of above-mentioned second embodiment, preferably, the compression area bearing the pressure for carrying out rigid grasp of the piston in described hydraulic pressure housing, is greater than the compression area bearing the pressure for carrying out Flexible Fixturing of the second piston in described second hydraulic pressure housing.
Preferably, the mold clamping device of the invention described above has hydraulic control check valve, and this hydraulic control check valve is connected with the balancing gate pit of the pressure be applied with for carrying out described rigid grasp of described hydraulic pressure housing.
The feature of continuous casting equipment involved in the present invention is, the both ends on the slab width of drawer at movable side long limit casting die part and fixation side long limit casting die part respectively arrange two above-mentioned arbitrary mold clamping devices respectively on upper strata and lower floor,
Two mold clamping devices on upper strata and two mold clamping devices of lower floor can control described rigid grasp pressure and Flexible Fixturing pressure independently of each other respectively,
The rigid grasp pressure of two mold clamping devices of lower floor is higher than the rigid grasp pressure of two mold clamping devices on upper strata.
According to the present invention, first pressure unit is applied for the piston in hydraulic pressure housing the pressure carrying out rigid grasp, second pressure unit is applied for the piston in hydraulic pressure housing the pressure carrying out Flexible Fixturing, and these pressure above-mentioned are adjusted, rigid grasp power and Flexible Fixturing power can be at random applied thus, so expensive equipment can not be used and utilize the simple and structure with versatility to apply clamping force between the casting die part of long limit.In addition, in the present invention, such problem is sandwiched, so stably the present invention can be used in casting process due to what do not produce dust.
Accompanying drawing explanation
Fig. 1 is the top view of the mold clamping device 10 that the first embodiment of the present invention is shown.
Fig. 2 is the top view of the mold clamping device 11 that 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 schematically showing mold clamping state.
Fig. 6 is the fragmentary perspective cross sectional view of the mold clamping state that Fig. 5 is shown.
Description of reference numerals:
1a ... fixation side long limit copper coin; 1b ... drawer at movable side long limit copper coin; 2a, 2b ... minor face copper coin; 3a ... fixation side long limit water tank; 3b ... drawer at movable side long limit water tank; 4a, 4b ... minor face water tank; 6a, 6b ... axle; 20 ... carrying cylinder; 21,41 ... hydraulic cylinder; 22 ... hydraulic pressure housing; 30,45 ... piston; 31 ... auxiliary rod; 32 ... mobile jib; 35 ... pull bar; 43 ... second hydraulic pressure housing; 44 ... bar; 51,52,53,54 ... introducing port.
Detailed description of the invention
Below, with reference to accompanying drawing, embodiments of the present invention are specifically described.Fig. 1 is the top view of the mold clamping device of the continuous casting equipment that embodiments of the present invention are shown.Comprise the long limit casting die part of the long limit copper coin 1a of fixation side and long limit water tank 3a, be configured to opposite each other with the long limit casting die part of the long limit copper coin 1b and long limit water tank 3b that comprise drawer at movable side, wherein, long limit water tank 3a is fixed on the behind of long limit copper coin 1a and cools long limit copper coin 1a, and long limit water tank 3b is fixed on the behind of long limit copper coin 1b and cools long limit copper coin 1b.And, pair of short edges casting die part is configured between above-mentioned long limit copper coin 1a and 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 on minor face water tank 4a, 4b of 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, axle 6a etc. respectively with the links such as this support plate 5a.Further, axle 6a etc. makes its bar advance along long side direction or retreat, and can change slab width thus by changing the position of minor face copper coin 2a etc.
The two end portions of the slab width of drawer at movable side long limit water tank 3b up and down two-layer be provided with mold clamping device 10, wherein, long for fixation side limit casting die part and drawer at movable side long limit casting die part link fixing by this mold clamping device 10.Figure 1 illustrates one of them mold clamping device 10.Cylindric carrying cylinder 20 is fixed on the back wall of drawer at movable side long limit water tank 3b in the mode that it is axially perpendicular to the back wall of drawer at movable side long limit water tank 3b, the rearward end of this carrying cylinder 20 is provided with hydraulic cylinder 21.Hydraulic pressure housing 22 and the carrying cylinder 20 of the cylindrical shape of this hydraulic cylinder 21 are fixed on the rearward end of carrying cylinder 20 coaxially.This hydraulic pressure housing 22 is also axially perpendicular to the mode of the back wall of long limit water tank 3b with it and is fixed, and its both ends close thus form seal cavity.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 with the face making its axial mode consistent with the axis of hydraulic pressure housing 22 be fixed on the water tank 3b side, long limit of piston 30.This mobile jib 32 is inserted the wall of mobile jib 32 side of hydraulic pressure housing 22 and enters in carrying cylinder 20.On the other hand, auxiliary rod 31 is with the face making its axial mode consistent with the axis of hydraulic pressure housing 22 be fixed on the opposition side of the mobile jib 32 of piston 30.The wall of auxiliary rod 31 side of hydraulic pressure housing 22 inserted by this auxiliary rod 31 and the outside towards carrying cylinder 20 is exposed.The wall of hydraulic pressure housing 22 inserted by this mobile jib 32 and auxiliary rod 31 fluid tightly, hydraulic pressure from be arranged at piston 30 both sides introducing port 51,52 and put in hydraulic pressure housing 22.The hydraulic pressure putting on the introducing port 51 of auxiliary rod 31 side of piston 30 is the hydraulic pressure of Flexible Fixturing, and the hydraulic pressure putting on the introducing port 52 of mobile jib 32 side of piston 30 is the hydraulic pressure of rigid grasp.The diameter of mobile jib 32 is less than the diameter of auxiliary rod 31, therefore, the hydraulic pressure acting on the space (balancing gate pit R1) by mobile jib 32 side compared with the piston 30 of hydraulic pressure housing 22 acts on larger area relative to piston 30, so can apply larger stress with less pressure versus piston 30.On the other hand, the diameter of auxiliary rod 31 is greater than the diameter of mobile jib 32, therefore, the hydraulic pressure acting on the space (balancing gate pit R2) by auxiliary rod 31 side compared with the piston 30 of hydraulic pressure housing 22 acts on less area relative to piston 30, so can apply less stress with larger pressure versus piston 30.Therefore, the Adjustment precision of the stress realized by the adjustment of pressure of balancing gate pit R2 is higher.The hydraulic pressure applied from introducing port 52 applies towards the stress of auxiliary rod 31 side to piston 30, and the hydraulic pressure applied from introducing port 51 applies towards the stress of mobile jib 32 side piston 30.In addition, the end of the opposition side of the long limit water tank 3b of hydraulic pressure housing 22 is provided with dust cover 23, thus the part of stretching out to the outside of hydraulic pressure housing 22 from hydraulic pressure housing 22 of auxiliary rod 31 is covered.
Further, the front end of mobile jib 32 is provided with flange 33, this flange 33 links in carrying cylinder 20 with flange 34, and wherein, this flange 34 is arranged at an end of pull bar 35 through for long limit water tank 3b and long limit water tank 3a.The other end of pull bar 35 is inserted into the rear side of long limit water tank 3a, and this other end becomes and forms threaded threaded portion 36.The support 38 at the back side being fixed on long limit water tank 3a is inserted and exposes towards the rear side of support 38 further by this threaded portion 36, nut 37 with screw togather from the part of the threaded portion 36 that this support 38 exposes.In addition, packing ring 39 has been clamped between the border end face relative to threaded portion 36 and support 38 of pull bar 35, packing ring 40 has been clamped between nut 37 and support 38, the other end of nut 37 is fixed on support 38 by carrying out fastening to nut 37, therefore, pull bar 35 is fixed on long limit water tank 3a via support 38.Thus, when pulling pull bar 35 on the direction towards drawer at movable side long limit water tank 3b, because pull bar 35 is fixed on support 38 by nut 37, so pull bar 35 does not move towards water tank 3b side, drawer at movable side long limit.In addition, although pull bar 35 and mobile jib 32 are configured to point body component that linked by flange 33,34 in the above-described embodiment, are not limited thereto, also pull bar 35 and piston 30 directly can be linked.
Next, the action of the clamping device of the present embodiment formed in the above-described manner is described.In FIG, pull bar 35 links (fixing) with fixation side long limit water tank 3a via part (threaded portion 36, support 38, packing ring 39, packing ring 40) and nut 37.Compared with the piston 30 of hydraulic pressure housing 22 by being applied with the hydraulic pressure of rigid grasp pressure p 1 in the balancing gate pit R1 of mobile jib 32 side via introducing port 52.Thus, because piston 30 moves towards the direction left from long limit water tank 3b, so drawer at movable side long limit water tank 3b is relatively to move along the mode of the pull bar 35 linked with piston 30 via mobile jib 32 towards fixation side long limit water tank 3a.Fig. 3 shows this hydraulic circuit.The solenoid A1 of direction switch valve SV1 is connected, direction setting is become V11, rigid grasp pressure is put on than piston 30 balancing gate pit R1 on the front via hydraulic control check valve V3.Now, direction switch valve SV2 is in neutral position, is communicated with via exhaust end T than the pressure in piston 30 balancing gate pit R2 rearward with atmospheric pressure.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 rigid grasp pressure putting on balancing gate pit R1 makes long limit water tank 3a and long limit water tank 3b direction close to each other puts between long limit water tank 3a and long limit water tank 3b via pull bar 35, thus is formed as rigid grasp state.
On the other hand, when in order to carry out slab width change operation the state between long limit water tank 3a and long limit water tank 3b is switched to Flexible Fixturing state, the solenoid A2 of direction switch valve SV2 is connected, direction is switched to V21 side.Direction switch valve SV1 keeps intact constant.So Flexible Fixturing pressure puts on than the balancing gate pit R2 rearward of the piston 30 in hydraulic fluid cylinder pressure 22 via introducing port 51.Thus, rigid grasp pressure is applied to balancing gate pit R1, Flexible Fixturing pressure is applied to balancing gate pit R2, and applying stress relative in piston 30 opposite directions, so pull the power of pull bar 35 (power by long limit water tank 3b extrudes towards long limit water tank 3a) to become the value of gained deduct Flexible Fixturing power from rigid grasp power after in the direction left from long limit water tank 3b via piston 30, thus clamping force correspondingly reduces, the power of long limit copper coin clamping minor face copper coin reduces, and makes frictional force between the two reduce thus.Thereby, it is possible to utilize axle 6a etc. to make minor face copper coin move on slab width.
In addition, when changing slab thickness when safeguarding by replacing minor face casting die part, the solenoid B1 of direction switch valve SV1 being connected, solenoid A1 is cut off.In addition, the solenoid A2 of direction switch valve SV2 is cut off.So the direction of direction switch valve SV1 is switched to towards V13 side.Thus, apply rigid grasp pressure to balancing gate pit R2, the pressure of balancing gate pit R1 becomes atmospheric pressure, pull bar 35 can be made to advance relative to water tank 3b side, drawer at movable side long limit to greatest extent or retreat, thus can change minor face casting die part.
And then, although when not carrying out slab thickness change operation when being in and carrying out safeguarding but carry out cleaning etc., all solenoids of direction switch valve SV1 and direction switch valve SV2 are cut off.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, makes balancing gate pit R1, R2 maintain this pressure state not long ago.
In the present embodiment, only can utilize long-rod type hydraulic cylinder and by clamped against one another for long limit casting die part, and rigid grasp, Flexible Fixturing can being carried out, carrying out the operation of slab thickness change by making the casting die part expansion of long limit open wide.Therefore, without the need to screw jack, CD-ROM drive motor, position detector and control device, thus can significantly reduce equipment cost and operating cost.In addition, be also difficult to produce the unfavorable condition caused by sandwiching of dust.And then, owing to not using spring, so without the need to carrying out the fixing of spring, thus making, operation is set become easy.And then, in the present embodiment, clamping force is obtained owing to acting on the stress of piston 30 based on pressure, even if so cause the width of minor face casting die part (length on slab thickness direction) to change relative to the width dimensions at casting initial stage because of the thermal expansion of minor face casting die part, and cause the forward-reverse position of pull bar 35 to change thus, because clamping force depends on pressure, as long as so clamping force remained constant, the impact of the thermal expansion of minor face copper coin would not be subject to.And then, in the present embodiment, the casting die part expansion of drawer at movable side long limit can be made and open wide, in addition, switching without the need to control device but by the direction of direction switch valve makes pull bar 35 can stop in arbitrary position, and can make the mobile emergent stopping of pull bar 35 under the state keeping this pressure dependence not long ago.
In the present embodiment, the diameter of the bar 31 being applied with the R2 side, balancing gate pit of Flexible Fixturing pressure is set greater than the diameter of the bar 32 of the R1 side, balancing gate pit being applied with rigid grasp pressure, reduce the compression area of Flexible Fixturing pressure thus, so the Adjustment precision of Flexible Fixturing pressure can be improved.In addition, owing to hydraulic control check valve V3 being connected with balancing gate pit R1 and being equipped on hydraulic cylinder, even if so also can prevent long limit casting die part from expanding unlimited each other when hydraulic piping bursts.In addition, when carrying out Flexible Fixturing, owing to being applied with rigid grasp pressure to balancing gate pit R1, and Flexible Fixturing pressure is applied with to balancing gate pit R2, so the pressure differential of two balancing gate pit R1, R2 reduces, reduce from balancing gate pit R1 towards the leakage rate of the pressure of balancing gate pit R2, reach the degree that can ignore.
Like this, in the present embodiment, setup cost and operating cost reduce, simple structure, and security is improved.In addition, without the need to expensive parts such as screw jack, spring assembly, position detectors.There is following advantage in the present embodiment: although use double rod type hydraulic cylinder, they can belong to same bar, and then, due to without the need to carrying out special processing to two bars, be arranged in existing continuous casting equipment so can apply widely.
In the present embodiment, divide in two positions, place of the both sides of slab width and be provided with above-mentioned clamping device up and down two-layerly.When the upper end of the copper coin from mold to the distance of liquid steel level (meniscus) is set to 100mm, the height of copper coin is set to 900mm, the height starting from meniscus molten steel is set to 1020mm, slab (slab) width is set to 2300mm, the density γ of molten steel is set to 7.00kg/m
3time, overall molten steel static pressure reaches every 1 mole of 8.375kg.If the distance L up and down of the clamping device of the clamping device on upper strata (upper shaft) and lower floor (lower side shaft) is 565mm, the distance L1 acted between the center of gravity of the molten steel static pressure of copper coin and upper shaft is 435mm, the distance L2 acted between the center of gravity of the molten steel static pressure of copper coin and lower side shaft is 130mm, then for acting on the molten steel static pressure (expansive force) of two groups, upside, the clamp shaft of two groups, downside, each axle of upper shaft reaches 964kg, and each axle of lower side shaft reaches 3224kg.If safety coefficient is set to 1.5, then going up axis clamping power is 1.445kg, and lower shaft clamping force is 4.836kg.Further, the basis of upper axis clamping power applying frictional force during minor face copper coin sliding friction when slab width changes further, reaching 1750kg by calculating known power now.Due to rubbing surface with on be coupling near, so be set to frictional force only act on axle.And then, based on using the lever principle of the lower end of copper coin as fulcrum, when the distance between copper coin lower end and lower side shaft is set to 10mm, obtain based on downside clamping force towards upside expansion opening loads be 115kg.Therefore, known by carrying out add operation to above-mentioned 3 kinds of load, need the rigid grasp power of 3310kg in upper shaft, need the rigid grasp power of 4836kg at lower side shaft.Therefore, known by estimating: the rigid grasp power needed for upper shaft is 3500kg, the rigid grasp power needed for lower side shaft is 5000kg.Further, if the diameter of piston 30 is set to 100mm, the diameter of bar 32 is set to 56mm, the diameter of bar 31 is set to 71mm, then, for the pressure in the pressure housing of hydraulic cylinder, when usually operating, (during rigid grasp) reaches 65kg/cm in upper shaft
2left and right and reach 93kg/cm at lower side shaft
2left and right, when changing width in casting process, (during Flexible Fixturing) reaches 65kg/cm according to the difference of the thickness of slab width in upper shaft
2~ 87kg/cm
2left and right and reach 35kg/cm at lower side shaft
2~ 99kg/cm
2left and right.For the admissible error of Flexible Fixturing pressure now, be 8kg/cm for upper shaft
2~ 10kg/cm
2left and right is 13kg/cm for lower side shaft
2~ 18kg/cm
2left and right.If adjust pressure when carrying out rigid grasp by common pressure-reducing valve, and adjust pressure when carrying out Flexible Fixturing by the proportional pressure-reducing valve of Remote Control Automatic setting, 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, above-mentioned rigid grasp pressure being applied with to balancing gate pit R1, Flexible Fixturing pressure is applied with to balancing gate pit R2, but the difference of above-mentioned pressure upper shaft and lower side shaft all less.Therefore, the leakage via the pressure of piston 30 is less.
Next, be described with reference to the mold clamping device 11 of Fig. 2 to the second embodiment of the present invention.In the present embodiment, hydraulic cylinder 41 has hydraulic pressure housing 22 and the second hydraulic pressure housing 43.Auxiliary rod 31 is fixed on the face of the opposition side of the mobile jib 32 of piston 30 coaxially with piston 30 in hydraulic pressure housing 22, and bar 44 is fixed on this auxiliary rod 31 in the mode linked coaxially with this auxiliary rod 31 in dust cover 42.The flange 56 of the second hydraulic pressure housing 43 links with the flange 55 of bar 44 side of dust cover 42.Bar 44 is fluid tightly by through for the wall of flange 56 side of this second hydraulic pressure housing 43, and bar 44 and the piston 45 be arranged in the second hydraulic pressure housing 43 link coaxially.The part of the opposition side of rod 44 compared with piston 45 of the inside of the second hydraulic pressure housing 43 becomes balancing gate pit R2, and hydraulic pressure puts on this balancing gate pit R2 via the introducing port 54 being arranged at the second hydraulic pressure housing 43.In addition, from the diameter of piston 30, the diameter of mobile jib 32 is deducted and the area (compression area of balancing gate pit R1) of the part obtained is greater than the area (compression area of balancing gate pit R2) of the part suitable with the diameter of piston 45.Because other structure is identical with the structure in the first embodiment, so mark same Reference numeral to identical parts, also description is omitted.Hydraulic circuit also can use the hydraulic circuit shown in Fig. 3.
In the present embodiment, when carrying out rigid grasp, rigid grasp pressure is put in balancing gate pit R1 via introducing port 53.Be atmospheric pressure in balancing gate pit R2.On the other hand, when carrying out Flexible Fixturing, the pressure in balancing gate pit R1 is kept intact constant, is put in balancing gate pit R2 by Flexible Fixturing pressure via introducing port 54.Thus, identical with the first embodiment, also can carry out the maintenances such as rigid grasp, Flexible Fixturing, the change of minor face casting die part, cleaning in the present embodiment.In addition, the compression area due to piston 45 is less than the compression area of piston 30, so can also finely tune the Flexible Fixturing pressure of hydraulic cylinder.Further, present embodiment also can play the effect identical with the first embodiment.
And then, in the present embodiment, the applying of rigid grasp power is carried out in hydraulic pressure housing 22, the applying of Flexible Fixturing pressure is carried out in the second hydraulic pressure housing 43, and hydraulic pressure housing 22 is separated completely with the second hydraulic pressure housing 43, so the impact to each other caused by internal leakage thoroughly can be prevented.But present embodiment needs to arrange the second hydraulic pressure housing 43, thus compared with the first embodiment, be disadvantageous in cost and installation space in these.
In the present invention, under normal circumstances, 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 these long limit casting die parts are arranged to two-layer up and down.Further, the hydraulic piping of each device is arranged to: can utilize the so different system of two mold clamping devices of two of upper strata mold clamping devices and lower floor control to hydraulic pressure housing apply rigid grasp pressure and Flexible Fixturing pressure.Thus, preferably, make the rigid grasp pressure of the mold clamping device of lower floor higher than the rigid grasp pressure of the mold clamping device on upper strata, thus make the clamping pressure of clamping pressure higher than top of the bottom of mold.There is molten steel in the central part not solidifying slab in mold, its hydrostatic pressure is larger more on the lower.Therefore, expansion (bulging) stress larger more is on the lower applied to mold, thus on the direction making the casting die part expansion of long limit open wide, stress is applied to these long limit casting die parts.Therefore, as the present invention, by making the clamping force of clamping force higher than top of the bottom of long limit casting die part, this swelling can be suppressed, thus reliably can prevent accidents such as splashing.
Industry utilizes possibility
According to the present invention, the simple and structure with versatility can be utilized to carry out rigid grasp and the Flexible Fixturing of the mold of continuous casting equipment, thus great contribution has been made to the high efficiency of continuous casting operation.
Claims (7)
1. a mold clamping device, mold is assembled into by being linked each other by the long limit casting die part in continuous casting equipment, wherein, described continuous casting equipment possesses: the fixation side that formation arranged opposite is a pair long limit casting die part and drawer at movable side long limit casting die part; And the pair of short edges casting die part between the casting die part of described long limit arranged opposite, described continuous casting equipment passes through to cast slab continuously to the region pour steel of being surrounded by described long limit casting die part and described minor face casting die part,
The feature of described mold clamping device is to have:
Pull bar, this pull bar is through on their opposed direction with described drawer at movable side long limit casting die part by long for described fixation side limit casting die part;
Hydraulic pressure housing, this hydraulic pressure housing is fixed on described drawer at movable side long limit casting die part, and described pull bar or the first bar linked with this pull bar are inserted into the inside of this hydraulic pressure housing fluid tightly;
Support, this support is fixed on described fixation side long limit casting die part, and is fixed into described pull bar is not departed from from casting die part side, described drawer at movable side long limit;
Piston, the first bar that this piston is linked to described pull bar or links with this pull bar, reciprocates relative to described drawer at movable side long limit casting die part in the mode liquid-tight relative to the inner surface of described hydraulic pressure housing in described hydraulic pressure housing,
First pressure unit, this first pressure unit in described hydraulic pressure housing to described piston apply towards the direction left from described drawer at movable side long limit casting die part, for carrying out the pressure of rigid grasp; And
Second pressure unit, this second pressure unit to described piston apply towards the direction of described drawer at movable side long limit casting die part, for carrying out the pressure of Flexible Fixturing.
2. mold clamping device according to claim 1, is characterized in that,
Described first pressure unit has the first introducing port, via this first introducing port, the hydraulic pressure being used for carrying out rigid grasp is imported to described hydraulic pressure housing compared with described piston by the balancing gate pit of casting die part side, described drawer at movable side long limit,
Described second pressure unit has the second introducing port, via this second introducing port, the hydraulic pressure being used for carrying out Flexible Fixturing is imported to described hydraulic pressure housing compared with described piston by the balancing gate pit of the opposition side of described drawer at movable side long limit casting die part.
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 being linked with the surface of described pull bar or the first bar as described piston, this the second bar is fixed on the rear surface of the opposition side of described front surface, the rear portion of this second bar is given prominence to from described hydraulic pressure housing is fluid tight towards the rear
The diameter of the described pull bar in described hydraulic pressure housing or described first bar is less than the diameter of described second bar.
4. mold clamping device according to claim 1, is characterized in that,
Described mold clamping device also has:
Second bar, in described hydraulic pressure housing, for the front surface being linked with the surface of described pull bar or the first bar as described piston, this second bar is fixed on the rear surface of the opposition side of described front surface, and the rear portion of this second bar is given prominence to from described hydraulic pressure housing is fluid tight towards the rear;
Second hydraulic pressure housing, this second hydraulic pressure housing is configured at the rear of described hydraulic pressure housing directly or indirectly;
Second piston, this second piston is arranged in described second hydraulic pressure housing, reciprocates in described second hydraulic pressure housing in the mode liquid-tight relative to the inner surface of described second hydraulic pressure housing relative to described drawer at movable side long limit casting die part; And
3rd bar, the 3rd bar is fixed on the front surface of the casting die part side, described drawer at movable side long limit of described second piston, inserts the wall in the front of described second hydraulic pressure housing fluid tightly, and links with described second bar,
Described first pressure unit has the first introducing port, via this first introducing port, the hydraulic pressure being used for carrying out rigid grasp is imported to described hydraulic pressure housing compared with described piston by the balancing gate pit of casting die part side, described drawer at movable side long limit,
Described second pressure unit has the second introducing port, via this second introducing port, the hydraulic pressure being used for carrying out Flexible Fixturing is imported to described second hydraulic pressure housing compared with described second piston by the balancing gate pit of the opposition side of described drawer at movable side long limit casting die part.
5. mold clamping device according to claim 4, is characterized in that,
The compression area bearing the pressure for carrying out rigid grasp of the piston in described hydraulic pressure housing, is greater than the compression area bearing the pressure for carrying out Flexible Fixturing of the second piston in described second hydraulic pressure housing.
6. the mold clamping device according to any one of Claims 1 to 5, is characterized in that,
Described mold clamping device has hydraulic control check valve, and this hydraulic control check valve is connected with the balancing gate pit of the pressure be applied with for carrying out described rigid grasp of described hydraulic pressure housing.
7. a continuous casting equipment, is characterized in that,
Both ends on the slab width of drawer at movable side long limit casting die part and fixation side long limit casting die part respectively arrange the mold clamping device according to any one of two the claims 1 to 6 on upper strata and lower floor respectively,
Two mold clamping devices on upper strata and two mold clamping devices of lower floor can control described rigid grasp pressure and Flexible Fixturing pressure independently of each other respectively,
The rigid grasp pressure of two mold clamping devices of lower floor is higher than the rigid grasp 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 CN103372635A (en) | 2013-10-30 |
| CN103372635B true 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) |
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|---|---|---|---|---|
| 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 |
| KR102127258B1 (en) | 2016-02-02 | 2020-06-26 | 닛폰세이테츠 가부시키가이샤 | Casting piece bending detection device and casting piece bending detection method |
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|---|---|---|---|---|
| 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 | Assembly mold clamping device 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN203209647U (en) | 2013-09-25 |
| CN103372635A (en) | 2013-10-30 |
| JP5944220B2 (en) | 2016-07-05 |
| JP2013230487A (en) | 2013-11-14 |
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