TWI481455B - Continuously beating apparatus for continuous casting of casting sheet - Google Patents

Description

Continuous hitting device for continuous casting of cast piece

The present invention relates to a continuous striking device for continuously casting a cast piece which imparts a striking vibration from a short side surface of a cast piece to improve center segregation and the like.

In the center portion of the thickness of the continuously cast slab and its vicinity, an internal defect called macro-segregation called center segregation or V segregation is apt to occur.

Among them, the central segregation system C, S, P, Mn, etc., which are easily segregated, are concentrated in the internal solidification portion of the slab, and the segregation is concentrated in the V segregation. The V-shape appears as an internal defect in the vicinity of the final solidified portion of the cast piece.

Further, in a product which is subjected to thermal processing of the cast piece in which such giant segregation occurs, a decrease in toughness or hydrogen induced cracking or the like is likely to occur. Further, when the products are processed into a final product by cold work, cracking easily occurs.

The segregation generation mechanism of the cast piece can be presumed as follows.

That is, as the solidification progresses, the deflecting component is concentrated between the trees belonging to the columnar crystals of the solidified structure. The molten steel in which the segregation component is concentrated flows out from the columnar crystal trees due to shrinkage of the cast piece at the time of solidification or expansion of a cast piece called bulging. The concentrated concentrated molten steel flows to the solidification completion point of the final solidified portion, and directly solidifies to form a concentrated band of the segregation component. The concentration band of the segregation component formed in the above manner is segregation.

In order to prevent the segregation of the cast pieces, it is effective to prevent the movement of the molten steel after the concentration of the deflection components between the trees of the columnar crystals is concentrated, and the patent documents 1 and 2 which are proposed later by the applicant of the present invention are effective. And preventing the concentrated steel from being locally accumulated.

The purpose of the "continuous casting method" of Patent Document 1 is to prevent the occurrence of segregation such as center segregation or V segregation by applying a hit to the cast piece to obtain a cast piece having good internal quality.

Therefore, in the case of casting a slab having a rectangular cross-sectional shape, the casting is carried out by vibrating the slab while continuously striking at least one portion of the short side surface of the slab including the unsolidified portion. In the method, the cast piece is given a hitting energy that satisfies the relationship indicated by E≧0.0065×W. Here, E is the hitting energy (J) for each hit given to the cast piece, and W is the long side width (mm) of the cast piece.

The purpose of the "continuous casting method for steel and the impact vibration device" of Patent Document 2 is to effectively hit a cast piece including an unsolidified portion from the surface of the cast piece even if it is a cast piece having a large cast piece width. The segregation of the cast piece is effectively prevented.

Therefore, in the method of casting the cast piece 1 having a rectangular cross section, the center solid phase ratio fs of the central portion of the thickness of the cast piece is in the range of at least 0.1 to 0.9, and the thickness direction of the cast piece 1 is made. The reduction ratio of 1 m is within 1%, the light reduction is continuously performed, and in at least one portion of the center solid phase ratio fs of 0.1 to 0.9, the opposite sides of the cast piece 1 are A continuous casting method in which the short side faces are continuously struck in the width direction of the cast piece. Furthermore, the method is performed by hitting a shock frequency of 4 to 12 Hz and a vibration energy of 30 to 150 J.

(Patent Document 1) Japanese Laid-Open Patent Publication No. 2006-110620, "Continuous Casting Method"

(Patent Document 2) Japanese Laid-Open Patent Publication No. 2007-229748, "Steel Continuous Casting Method and Impact Vibrating Device"

As shown in Fig. 1, the continuous casting method of the steel of Patent Document 2 can be used in the casting direction by guiding the cast piece 51 which has been solidified and cast in the mold by a plurality of guide rolls 52a of the section 52. In the middle of drawing on the downstream side, the mold 53 and the like are placed in the striking vibration device in the section 52.

In Fig. 1, 53 is a mold for hitting the short side surface of the cast piece 51, and is configured to have a structure of a striking plate 53a which is a region which can be formed by a plurality of guide rolls 52a. The short side of the slab 51 of at least one of the segments 52 of the segment 52 is integrally formed as a unitary hitting, and the striking can be continuously performed in one segment.

The section 52 is generally divided into upper and lower sections, and the depression slope of the upper section 52b can be adjusted, and the structure can be prevented from being lightly depressed. Further, the section 52 shown in Fig. 1 is formed such that the upper section 52b and the lower section 52c are parallel and no depression slope is provided, and it is set as a general guide roller pair which does not press the cast piece 51.

The 54 is a striking device in which the mold 53 is attached at the front end portion thereof, and is a cylinder for generating periodic vibration and transmitting the vibration to the mold 53. The striking device 54 is disposed, for example, at two locations on the short side faces of both sides of the cast piece 51 including the unsolidified portion.

The 55-series hitting positioning device pushes the mold 53 from the standby position shown in FIG. 2A to the short side surface of the cast piece 51 (see FIG. 2B), and after detecting the pressing position, sets the mold 53. The distance L between the front end surface of the mold 53 and the short side surface of the cast piece 51 (the hitting amplitude: about 8 mm) at the return position (refer to FIG. 2C).

The interval L between the mold 53 and the short side surface of the cast piece 51 varies depending on the width of the cast piece 51 to be cast. Therefore, it is necessary to set the short side of the cast piece 51 in the casting. That is, the interval L affects the stroke of the striking device 54. When the stroke is insufficient, the speed at the time of striking cannot be ensured, and the striking vibration energy cannot be sufficiently obtained. Therefore, at the start of the striking, the relative positional adjustment of the short side faces of the mold 53 called positioning and the cast piece 51 is performed.

The continuous casting method of the steel of Patent Document 2 is such that when the cast piece 51 having a rectangular cross section is cast, the center solid phase ratio fs of the central portion of the thickness of the cast piece is set to be at least 0.1 to 0.9, and the cast piece is made. In the thickness direction of 51, the reduction ratio per 1 m is within 1%, the light reduction is continuously performed, and in at least one portion in which the center solid phase ratio fs is in the range of 0.1 to 0.9, the above-mentioned hitting device is used. When the shock frequency is 4 to 12 Hz and the vibration energy is 30 to 150 J, the short sides of the opposite sides of the cast piece 51 are continuously hit toward the width direction of the cast piece.

However, the aforementioned striking vibration device has the following problems.

The above-mentioned striking vibration device is exposed to radiant heat, scale, water, and the like from the slab 51 at a high temperature (for example, about 1200 ° C) while being subjected to a high frequency (4 to 12 Hz) large impact (30 to 150 J), thereby being durable. The problem of low sexuality.

In other words, when the cylinder is used as the striking device 54 and the electric shock is controlled by the electromagnetic valve, the solenoid valve, the cylinder, the cable, etc. are often damaged in the harsh environment described above, and eventually cannot be broken. Continuous use for several days or more.

Further, as shown in Fig. 1, when the interval L is set by the hitting positioning device 55, the mold 53 is dragged by the cast piece 51 in continuous casting, and is subjected to large in the lateral direction (moving direction of the cast piece 51). The force of the hitting device 54 and the hitting and positioning device 55 are susceptible to damage.

The present invention has been developed in order to solve the aforementioned problems. That is, a first object of the present invention is to provide a continuous striking device for continuous casting of cast slabs which is capable of hitting a vibration frequency (for example, 4 to 12 Hz) with a predetermined hitting energy (for example, 30 to 150 J). The short side faces of the opposite sides of the cast piece 51 formed by the continuous casting of steel are continuously struck in the width direction of the cast piece, and even if exposed to the cast piece 51 from a high temperature (for example, about 1200 ° C). The radiant heat, scale, water, etc., are subject to high frequency (4 to 12 Hz) large impact (30 to 150 J), and can be used continuously for a long period of time with high durability.

A second object of the present invention is to provide a continuous striking device for continuous casting of a cast piece, which is capable of hitting a hitter with a certain hitting energy even if the frequency of the striking vibration is changed.

A third object of the present invention is to provide a continuous striking device for continuous casting of cast slabs which can be used continuously for a long period of time without any slabs and repeated impacts.

Furthermore, a fourth object of the present invention is to provide a continuous striking device for continuous casting of a cast piece, which is capable of correctly positioning the cast piece in continuous casting without undergoing a large force in the transverse direction. And hit with a predetermined hitting energy.

The continuous striking device for continuous casting of a cast piece according to the present invention comprises: a striking member for striking a cast piece; a compression spring for biasing the striking member toward the cast piece; and a cam mechanism for striking the member Moving away from the cast piece to compress the compression spring, and then freely moving the striking member; and a body for supporting the striking member, the compression spring and the cam mechanism; wherein, when striking, the cam mechanism The striking member is free to accelerate away from the striking member, thereby converting the compression energy of the compression spring into the kinetic energy of the striking member, which collides with the cast piece to impart a predetermined hitting energy to the cast piece.

According to a preferred embodiment of the present invention, the striking member is a mold for striking a striking surface of a cast piece, and a striking position and a striking surface at one end of which are fixed to the mold and in contact with the striking surface. a reciprocating member that reciprocates between the accumulation positions of the predetermined distance, wherein the compression spring is sandwiched between the reciprocating member and the body, and retains a predetermined compression energy at the accumulation position, and at the hitting position Dissipating the aforementioned kinetic energy, the cam mechanism is composed of a rotating cam rotatably supported on the body, and moving the reciprocating member to the accumulation position at a predetermined cycle, and then freely reciprocating the member Moving to the hitting position; and rotating the driving device for rotationally driving the rotating cam.

Furthermore, the cam curve of the aforementioned rotating cam is preferably an Archimedes curve in which the rotation angle is proportional to the displacement.

Further, the reciprocating member includes a cam follower that is rotatable while being in contact with the rotating cam.

Further, the natural period of the compression spring is set such that the rotary cam and the cam follower are in contact with each other at the compression position of the compression spring.

Further, a damper device is provided which attenuates the moving speed when the reciprocating member moves toward the cast piece side by the hitting position.

Furthermore, a moving device for moving the body forward and backward relative to the cast piece is provided; and a positioning mechanism for positioning the body relative to the cast piece at a predetermined position.

Further, the positioning mechanism is constituted by a plurality of guide rollers that are rotatably attached to the main body and that are free to rotate while being in contact with the striking surface of the cast piece at a predetermined position.

(Effect of the invention)

According to the configuration of the present invention, the continuous striking device is provided with a striking device, a compression spring, a cam mechanism and a body, and the striking member is moved away from the cast piece by the cam mechanism to compress the compression spring, and then at the time of striking The cam mechanism will leave the striking member to freely accelerate the striking member, thereby converting the compression energy of the compression spring into the kinetic energy of the striking member, and the striking member collides with the cast piece to give a predetermined blow to the cast piece. The energy is applied, so that a durable device that does not rely on electrical control can be provided.

That is, the continuous striking device of the present invention can continuously strike the short side faces of the opposite sides of the cast piece formed by continuous casting of steel toward the width direction of the cast piece, and even if exposed to high temperature ( For example, the radiant heat, scale, water, and the like of the cast piece 51 of about 1200 ° C) are simultaneously subjected to a high frequency (4 to 12 Hz) large impact (30 to 150 J), and can also be used continuously for a long period of time with high durability.

Furthermore, the compression spring is clamped between the reciprocating member and the body, retains a predetermined compression energy at the accumulation position, and releases the aforementioned kinetic energy at the striking position, and the cam mechanism is composed of the following members: a rotating cam to reserve a cycle of moving the reciprocating member to the accumulation position, and then freely moving the reciprocating member to the striking position; and a rotation driving device for rotationally driving the rotating cam; by the above configuration, the rotation can be performed by rotating the device The rotational speed of the cam rotation drive sets a predetermined hitting vibration frequency (for example, 4 to 12 Hz), and sets a predetermined compression energy of the compression spring to a predetermined hitting energy (for example, 30 to 150 J).

Moreover, since the cam curve of the rotating cam is an Archimedes curve whose rotation angle is proportional to the displacement, the cam mechanism can leave the striking member at the time of striking and can easily freely accelerate the striking member.

Furthermore, since the displacement (the amount of deflection) of the compression spring due to the rotating cam is constant due to the accumulation position and the striking position, even if the frequency of the striking vibration is changed by the rotational speed of the rotating cam, it can be fixed. Hit the energy to hit.

In addition, since the natural period of the compression spring is set in such a manner that the rotary cam and the cam follower are re-contacted at the compression position of the compression spring, the collision speed when the rotary cam and the cam follower are re-contacted can be reduced, and the rotary cam can be improved. Durability with cam followers.

Further, since the moving speed of the reciprocating member is attenuated by the damper device when the reciprocating member moves toward the cast piece side by the striking position, collision between the rotating cam and the cam follower can be prevented even if there is no cast piece And repeatedly hitting the fall, it can also be used continuously for a long period of time with high durability.

Furthermore, since the moving device is provided with the body moving forward and backward with respect to the slab; and the positioning mechanism (for example, a plurality of guide rollers) for positioning the body at a predetermined position with respect to the slab, it can be not subjected to large in the lateral direction. Under the force, the cast piece in continuous casting is correctly positioned and hit with a predetermined hitting energy.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the drawings, the same reference numerals are given to the same parts in the drawings, and the description thereof will be omitted.

Fig. 3 is an overall perspective view of a continuous striking device for continuous casting of a cast piece according to the present invention.

In Fig. 3, the continuous striking device 10 of the present invention is configured to simultaneously or interactively strike the short side faces 1a of the opposite sides of the cast piece 1 in a total of two sets on both sides. Furthermore, 12 is a mold, 14 is a body, and 16 is a mobile device.

The cast piece 1 is produced by continuous casting of steel in the inner diameter of the mold, and has a substantially rectangular cross section and continuously moves in one direction.

Further, in the actual continuous casting, the cast piece 1 is extended in an arc shape, and the moving direction thereof is preferably formed at an angle of 45 to 54 degrees from the vertical obliquely downward direction, but the present invention is not limited thereto. Tilting also allows the cast piece 1 to move horizontally or vertically.

Further, the cast piece 1 provided at the position where the continuous striking device 10 is provided includes a cast piece having an unsolidified portion, and the surface is solidified and adhered to the scale, but the surface temperature is high (for example, about 1200 ° C), and the inside is The system is in a state of not being solidified or semi-melted. Further, the present invention is not limited to the cast piece 1 in this state, and may be in other states.

In Fig. 3, the mold 12 strikes the short side faces 1a (hereinafter referred to as the striking faces) on the opposite sides of the cast piece 1. The mold 12 extends along the direction in which the cast piece 1 moves toward the cast piece, and has a height (thickness) lower than the full height (thickness in the height direction) of the striking face 1a, and the short side face 1a (striking face) The full height of the central part is hit.

The main body 14 is placed on the support table 15, and is linearly moved to a direction orthogonal to the striking surface 1a (for example, a horizontal direction) by a linear guide (not shown).

In this example, the moving device 16 is composed of a pneumatic or hydraulic direct acting cylinder 17, a rocking shaft 18, and connecting members 19a, 19b, and 19c, and the body 14 is expanded and contracted by the linear moving cylinder 17. It moves forward and backward with respect to the cast piece 1.

Further, the configuration of the mobile device 16 is not limited to this example.

Fig. 4 is a plan view showing the relationship between the cast piece 1 and the two consecutive hitting devices 10.

In the figure, reference numeral 20 denotes a positioning mechanism. In this example, a plurality of (three in the figure) guide rollers 20a are formed. The guide roller 20a is rotatably attached to the body 14 and has one side. It is in contact with the striking surface 1a of the cast piece 1 at a predetermined position, and is free to rotate.

With this configuration, the body 14 is advanced relative to the cast piece 1 by the moving means 16 so that the plurality of guide rolls 20a are in contact with the striking face 1a of the cast piece 1, whereby the side of the guide roll 20a is cast in continuous casting The sheet 1 is in contact and free to rotate on one side, so that the body 14 can be correctly positioned at a predetermined position with respect to the cast piece 1 without being subjected to a large force in the lateral direction.

Figs. 5A and 5B are views showing the configuration of the main part of the continuous striking device 10. Fig. 5A shows the accumulation position, and Fig. 5B shows the hit position.

In the figures, the continuous striking device 10 of the present invention includes a striking member 22, a compression spring 30, and a cam mechanism 32. The striking members, compression springs, and cam mechanisms are supported on the body 14.

The striking member 22 is composed of a mold 12 that strikes the striking surface 1a of the cast piece 1, and a reciprocating member 23. In this example, the reciprocating member 23 is composed of two sliding portions 24, a cam follower table 25, a cam follower 26, and a connecting portion 27 at two locations.

Further, as shown in Fig. 6, the striking member 22 is constituted by the mold 12 and the reciprocating member 23, and the reciprocating member 23 is composed of a sliding portion 24 of one portion, a cam follower table 25, a cam follower 26, When the connection portion 27 of one portion is formed, it also has the same function. Hereinafter, a case where the sliding portion of the two portions and the connecting portion of the two portions are formed will be described.

The joint portion 27 of the two portions is fixed to the mold 12 at one end (upper end in the drawing), and extends in parallel in a direction orthogonal to the striking surface 1a, and is fixed to the bearing 21a of the support plate 14a of the main body 14 by The direction orthogonal to the striking face 1a is supported in a reciprocable manner. Further, the sliding portions 24 of the two portions extend in a direction orthogonal to the striking surface 1a in parallel, and are supported by the bearing 21b of the supporting plate 14b of the main body 14 in a reciprocating manner. The direction in which the face 1a is orthogonal.

The cam follower table 25 is fixed to the sliding portion 24 at two positions and the connecting portion 27 of the two portions at both ends, and is reciprocally movable to the sliding portion 24 of the two portions and the connecting portion 27 of the two portions. Ground composition. Further, in this example, the central portion of the cam follower table 25 is recessed in a direction away from the striking surface 1a, but the present invention is not limited thereto, and may be linear, for example.

The cam follower 26 is rotatably attached to the intermediate portion of the cam follower table 25, and is rotatable while being in contact with a rotating cam 33, which will be described later. In the present invention, however, the cam follower 26 is not constantly in contact with the rotary cam 33, but is in contact during compression of the compression spring 30 by the rotary cam 33, and the rotary cam 33 will follow the cam follower when struck 26 leaves, and the reciprocating member 23 is freely accelerated together with the cam follower 26.

With the above configuration, the reciprocating member 23 is configured such that one end (the upper end in the drawing) is fixed to the mold 12, and the striking position (F) where the mold 12 is in contact with the striking surface 1a and the mold 12 are spaced from the striking surface 1a. The reciprocating movement between the accumulation positions (B) of the predetermined distances.

This "predetermined distance" corresponds to a compression distance at which the compression spring 30 is compressed by the rotating cam 33.

The compression spring 30, in this example a coil spring, is held in a compressed state between the reciprocating member 23 (in this example, the cam follower table 25) and the body 14 (in this example, the support plate 14b), The accumulation position (the position of Fig. 5A) holds the predetermined compression energy E1, and the movement energy E2 is released at the striking position (the position of Fig. 5B).

The difference between the kinetic energy E2 is the accumulation position (the position in Fig. 5A) and the compression energy of the compression spring 30 in the striking position (the position in Fig. 5B). With the relationship between the kinetic energy E2 ≦ compression energy E1 and the compression amount of the compression spring 30 at the striking position (the position of FIG. 5A) by a spacer or the like, the kinetic energy E2 can be increased.

The cam mechanism 32 is composed of a rotary cam 33 that rotatably supports the main body 14 and a rotary drive that rotationally drives the rotary cam 33.

The rotary cam 33 rotates while being in contact with the cam follower 26 of the reciprocating member 23, and moves the reciprocating member 23 (in this example, the cam follower table 25) to the accumulation position at a predetermined cycle (Fig. 5A) Position), then leaving the cam follower 26, and the reciprocating member 23 is freely moved to the striking position (position of FIG. 5B).

In this example, the cam curve of the rotating cam 33 is an Archimedes curve in which the rotation angle is proportional to the displacement. Furthermore, the present invention is not limited to the Archimedes curve as long as the reciprocating member 23 is moved to the accumulation position (the position of FIG. 5A) at a predetermined cycle to compress the compression spring 30, and then exits the cam follower 26. When the reciprocating member 23 is freely moved to the striking position (the position in FIG. 5B), other curves may be used.

The rotary drive device (not shown) can use any rotary drive device (for example, a motor + reducer) as long as the rotary cam 33 can be rotated at a predetermined speed.

Furthermore, when the rotary driving device moves the main body 14 forward and backward relative to the cast piece 1 by the moving device 16, a well-known universal joint (for example, a Schmidt connector, a universal connector, etc.) may be disposed in the middle thereof. The rotation power can be transmitted to the rotating cam 33.

According to the configuration of the present invention described above, the continuous striking device 10 includes the striking member 22, the compression spring 30, the cam mechanism 32, and the main body 14, and the striking member 22 is moved in the direction away from the cast piece 1 by the cam mechanism 32. The compression spring 30 is compressed (Fig. 5A).

Next, at the time of striking, the cam mechanism 32 (rotating cam 33) will leave the striking member 22 (cam follower 26) to freely accelerate the striking member 22, thereby converting the compression energy E1 of the compressing member 30 into a hit. The kinetic energy E2 of the member 22 (mold 12) is caused to collide with the slab 1 by the striking member 22, and the slab 1 is given a predetermined striking energy (= kinetic energy E2) (Fig. 5B).

Therefore, the continuous striking device 10 of the present invention is a device that does not rely on electrical control for durability.

That is, the continuous striking device 10 of the present invention can continuously strike the short side faces 1a of the opposite sides of the cast piece 1 formed by continuous casting of steel toward the width direction of the cast piece, and even if exposed to The radiant heat, scale, water, etc. of the slab 51 from a high temperature (for example, about 1200 ° C) are simultaneously subjected to a high frequency (4 to 12 Hz) large impact (30 to 150 J), and can be continuously used for a long period of time with high durability. By.

Further, the compression spring 30 is sandwiched between the reciprocating member 23 (the cam follower table 25) and the body 14 (the support plate 14b), and holds a predetermined compression energy E1 at the accumulation position (the position of FIG. 5A), and The kinetic energy E2 is released at the striking position (the position of FIG. 5B), and the cam mechanism 32 is composed of a rotating cam 33 that moves the reciprocating member 23 to the accumulation position at a predetermined cycle (position 5A). And then moving the reciprocating member 23 to the striking position (the position of FIG. 5B); and rotating the driving member for rotationally driving the rotating cam 33; by the above configuration, the rotating cam can be rotated by the rotating driving device The rotational speed of the rotational drive 33 is freely set to a predetermined hitting vibration frequency (for example, 4 to 12 Hz), and the converted compression energy E1 of the compression spring 30 is converted into a predetermined hitting energy E2 (for example, 30 to 150 J).

Moreover, since the cam curve of the rotating cam 33 is an Archimedes curve whose rotation angle is proportional to the displacement, the cam mechanism 32 will leave the striking member 22 at the time of striking, and the striking member 22 can be easily accelerated freely. .

Further, since the displacement (the amount of deflection) of the compression spring 30 due to the rotation cam 33 is constant due to the accumulation position (the position in FIG. 5A) and the striking position (the position in FIG. 5B), even if the rotation cam is used The rotation speed of 33 changes the frequency of the striking vibration, and can also be hit with a certain hitting energy.

7A and 7B are views showing the positional relationship between the rotary cam 33 and the cam follower 26. Fig. 7A shows the case where the mold 12 does not collide with the cast piece 1, and Fig. 7B shows the mold 12 and the cast piece 1 The situation of collision.

In Figs. 7A and 7B, the horizontal axis θ is the rotation angle of the rotary cam 33, and the value of 0 to 2π is repeated for each rotation. Furthermore, the vertical axis y is the displacement of the cam follower 26.

In the figure, the cam curve 33a of the rotary cam 33 is an Archimedes curve in which the rotation angle θ is proportional to the displacement y, and the broken line of A-B-C in the figure is repeated in each rotation of the rotary cam 33. The straight line AB can be expressed by the following formula (1).

Y=a×θ-y3...(1)

Here, a is the inclination of the straight line AB (=(y1+y3)/2π).

In Figs. 7A and 7B, as shown by the trajectory 26a of the cam follower 26 and the cam curve 33a, the cam follower 26 is at a rotation angle θ of the rotary cam 33 at an intermediate angle β to 2π between the angles α and 2π. When it is in contact with the rotating cam 33 and is displaced with the cam curve 33a, it does not contact the rotating cam 33 and is freely moved by the spring force at the angle 0 to the angle β.

When the mold 12 does not collide with the cast piece 1, as shown in Fig. 7A, the locus 26a of the cam follower 26 is a curve of a-b-c-d-e-f. That is, the accumulation position (the position in FIG. 5A) corresponds to the point B, and the compression spring 30 is compressed by the distance from the initial position y1 while maintaining the predetermined compression energy E1.

Next, when the rotation angle θ of the rotary cam 33 exceeds 0, the cam follower 26 is accelerated by the spring force, following the trajectory of the curve a-b-c. Here, the curve a-b is an acceleration period in which the spring extends from the compressed state to the deflection 0 (the state of the natural length), and the curve b-c is a deceleration period in which the spring extends beyond the initial position.

The present invention has a damper device 35 which attenuates the moving speed when the reciprocating member 23 is moved to the cast piece side by the striking position (y = 0) as shown in Figs. 5A and 5B. The damper device 35 is, for example, a hydraulic damper or a damper rubber. In the examples of Figs. 5A and 5B, the damper device 35 is disposed between the reciprocating member 23 and the body 14 (support plate 14a).

The damper device 35 operates only in the curve b-c so that the damping force is set such that the curve b-c-d does not collide with the cam curve 33a.

With this configuration, when the reciprocating member 23 is moved to the cast piece side by the hitting position (y=0), the moving speed of the reciprocating member 23 is attenuated by the damper device 35, and the cam follower 26 can be prevented from The collision of the rotating cam 33 can be continuously used for a long period of time and has high durability even without the cast piece 1 and repeatedly hitting the falling.

In Fig. 7A, the curve c-d-e-f is the free vibration of the spring and is determined by the natural period of the compression spring 30. The natural period is set such that the rotary cam 33 is brought into contact with the cam follower 26 at the compression position (point f in the figure) of the compression spring 30.

With this configuration, the collision speed at the time of re-contact of the rotary cam 33 with the cam follower 26 (point f in the drawing) can be reduced, and the durability of the rotary cam 33 and the cam follower 26 can be improved.

When the mold 12 collides with the cast piece 1, as shown in Fig. 7B, the locus 26a of the cam follower 26 is between the curve of a-b-g and the curve of a-b-h-i-j-k.

That is, the accumulation position (the position in FIG. 5A) corresponds to the point B, and the compression spring 30 is compressed by the distance from the initial position y1 while maintaining the predetermined compression energy E1.

Next, when the rotation angle θ of the rotary cam 33 exceeds 0, the cam follower 26 is accelerated by the spring force, following the trajectory of the curve a-b. Among them, the curve a-b is an acceleration period in which the spring extends from the compressed state to the deflection 0 (the state of the natural length).

When the cast piece 1 exists at a predetermined position (y=0) and its rebound coefficient is 0, that is, the cast piece 1 is a completely plastic body, the cam follower 26 collides with the cast piece 1 to stop at this position and maintain The straight line g is in contact with the cam curve 33a at an angle α and then compressed to a point B along the cam curve 33a.

When the cast piece 1 exists at a predetermined position (y=0) and its rebound coefficient is 1, the cam follower 26 collides with the cast piece 1 to bounce at the same speed, following the hijk curve, at the k point and the rotating cam 33 The collision is then compressed along the cam curve 33a.

When the cast piece 1 exists at a predetermined position (y = 0) and its rebound coefficient is between 0 and 1, the locus 26a of the cam follower 26 is between the curve of a-b-g and the curve of a-b-h-i-j-k.

The natural period of the compression spring is set such that the rotary cam 33 is brought into contact with the cam follower 26 at the compression position of the compression spring 30 (point k in the figure).

With this configuration, the collision speed when the rotary cam 33 comes into contact with the cam follower 26 (point k in the figure) can be reduced, and the durability of the rotary cam 33 and the cam follower 26 can be improved.

(Example)

Actually, the continuous striking device 10 of the above-described configuration was used, and it was confirmed by using the actual cast piece 1 that the continuous striking device 10 of the present invention can be used for the casting of the cast piece 1 which is formed by continuous casting of steel. The short side faces on both sides are continuously struck in the width direction of the cast piece, and even if exposed to radiant heat, scale, water, etc. from the cast piece 1 at a high temperature (for example, about 1200 ° C), and subjected to high frequency (4 to 12 Hz) The large impact (30 to 150J) can also be used continuously for a long period of time.

That is, the durability of the apparatus according to the conventional method of using the cylinder as the striking device and performing the hitting by the electrical control of the electromagnetic valve (maintenance due to severe failure) is based on the durability of the present invention. The results of the comparison are shown in Figure 8.

In general, the continuous casting section can be continuously used for 6 months to 1 year on the production line as long as there is no roll wear and failure (bearing damage, water leakage, etc.). Equipment durability assessment refers to the continuous hitting device for equipment failure/offline maintenance for maintenance due to serious faults (except for the section life). Compared to the conventional method, continuous hitting can be performed for about 12 times.

The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit and scope of the invention.

1, 51. . . Cast

1a. . . Short side face (hitting face)

10. . . Continuous hitting device

12, 53. . . Mold

14. . . Ontology

14a, 14b. . . Support board

15. . . Support desk

16. . . Mobile device

17. . . Direct acting cylinder

18. . . Shake shaft

19a, 19b, 19c. . . Link

20. . . Positioning mechanism

20a. . . Guide rollers

21a, 21b. . . Bearing

twenty two. . . Hit member

twenty three. . . Reciprocating member

twenty four. . . Sliding portion

25. . . Cam follower

26. . . Cam follower

27. . . Linkage

30. . . compressed spring

32. . . Cam mechanism

33. . . Rotating cam

33a. . . Cam curve

35. . . Damper device

52. . . Section

52a‧‧·guide roller

52b‧‧‧ upper section

52c‧‧‧lower section

53‧‧‧ Beating device

53a‧‧‧ playing board

54‧‧‧撃打定位装置

E1‧‧‧Compressed energy

E2‧‧‧ sports energy

L‧‧‧ interval

Fig. 1 is a configuration diagram of a continuous casting apparatus in which steel of a striking vibration device of Patent Document 2 is attached.

Fig. 2A is an explanatory view of the operation of the striking vibration device of Patent Document 2.

Fig. 2B shows a state in which the mold 53 is pressed from the standby position shown in Fig. 2A to the short side surface of the cast piece 51.

Fig. 2C shows a state in which the mold 53 is pulled back from the state of Fig. 2B.

Fig. 3 is an overall perspective view of a continuous striking device for continuous casting of a cast piece according to the present invention.

Fig. 4 is a plan view showing the relationship between the cast piece 1 and the two continuous hitting devices 10.

Fig. 5A is a configuration diagram of a main portion of the continuous striking device 10, and shows an accumulation position.

Fig. 5B is a configuration diagram of the main portion of the continuous striking device 10, and shows the striking position.

Fig. 6 is a view showing another configuration of the main part of the continuous striking device 10.

Fig. 7A shows the positional relationship between the rotary cam 33 and the cam follower 26, and shows that the mold 12 does not collide with the cast piece 1.

Fig. 7B shows the positional relationship between the rotary cam 33 and the cam follower 26, and shows the case where the mold 12 collides with the cast piece 1.

Figure 8 is a graph comparing the durability of the apparatus of the present invention with the conventional apparatus.

12. . . Mold

14. . . Ontology

14a, 14b. . . Support board

21a, 21b. . . Bearing

twenty two. . . Hit member

twenty three. . . Reciprocating member

twenty four. . . Sliding portion

25. . . Cam follower

26. . . Cam follower

27. . . Linkage

30. . . compressed spring

32. . . Cam mechanism

33. . . Rotating cam

35. . . Damper device

Claims (6)

The utility model relates to a continuous beating device for continuous casting of a cast piece, which comprises: a beatting member for bucking a cast piece; a compression spring for pressing the battering member toward the cast piece; and a cam mechanism for moving the battering member away from the cast piece, Compressing the compression spring, and then moving the bounce member freely; the body supporting the bounce member, the compression spring and the cam mechanism; moving the device to advance and retreat the body relative to the cast piece; and positioning the mechanism to cause the body to be opposite to the body The slab is positioned at a predetermined position, and the positioning mechanism is composed of a plurality of guide rollers rotatably mounted on the body, and is freely rotatable while being in contact with the ramming surface of the slab at a predetermined position. Wherein, in the beating, the cam mechanism will leave the battering member to freely accelerate the bounce member, thereby converting the compression energy of the compression spring into the kinetic energy of the battering member, and the battering member will collide with the cast piece to impart the cast piece Scheduled to beat energy. The continuous beating device for continuous casting of a cast piece according to the first aspect of the invention, wherein the beating member is composed of: a mold for beating the beat surface of the cast piece; and a reciprocating member fixed to the mold at one end And reciprocating between the hitting position in contact with the striking surface and the accumulating position of the predetermined distance from the striking surface; The compression spring is sandwiched between the reciprocating member and the body, retains a predetermined compression energy at the accumulation position, and releases the kinetic energy at the slamming position. The cam mechanism is composed of a rotating cam to The body is rotatably supported, and the reciprocating member is moved to the accumulation position at a predetermined cycle, and then the reciprocating member is freely moved to the bounce position; and the rotary driving device is configured to rotationally drive the rotary cam. The continuous beating device for continuous casting of a cast piece according to the second aspect of the patent application, wherein the cam curve of the rotating cam is an Archimedes curve whose rotation angle is proportional to the displacement. A continuous squeezing device for continuous casting of cast slabs according to the second aspect of the invention, wherein the reciprocating member is provided with a cam follower that is rotatable while being in contact with the rotating cam. A continuous beating device for continuous casting of cast pieces according to item 4 of the patent application, wherein the natural period of the compression spring is set such that the rotary cam and the cam follower are in contact with each other at a compression position of the compression spring. A continuous squeezing device for continuous casting of a cast piece according to the second aspect of the invention, wherein the damper device is configured to attenuate the moving speed when the reciprocating member moves toward the cast piece side by the hitting position.