JPS6096323A - Down coiler - Google Patents

Abstract

PURPOSE:To enhance the responsiveness of a motion of roll opening and closing by providing a rocking frame equipped with a winding roll used for pressing a coil against a winding mandrel and providing a hydraulic circuit used for communicating a frame rocking cylinder to a position control cylinder. CONSTITUTION:Plural rocking frames 33 equipped with winding rolls 3 for pressing a band-shaped sheet material 25 against a winding mandrel 1 are rockably supported by a coil housing 13 through both ends of axial rods 12, and frame rocking cylinders 34 for providing pressing forces to the material 25 are connected to the rolls 3 respectively, and hydraulic circuits are formed respectively by communicating the cylinders 34 to position controlling cylinders 36 and servovalves 40, etc. in series. Then the hydraulic pressures to respective cylinders 34, 36 are controlled by the servovalves 40 so that the positions of rolls 3 are controlled respectively by rocking the frames 33 in accordance with the attaching condition of the material 25 to the mandrel 1. In this way, the responsiveness of rapid opening and closing motion of the winding roll is enhanced, and the head end mark of a band-shaped sheet material is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a down coiler for winding a strip-shaped plate material.

A down coiler is a type of winding machine that winds various strip-shaped plate materials. This down coiler is used, for example, as described below, to wind up a band-shaped plate material (hereinafter referred to as "strip") rolled by a rolling mill.

Usually, hot strip rolled in a continuous hot strip steel rolling mill (Horatos IJ Schiffle) is wound into a coil at a high temperature by a down coiler, and then sent to the next process.

In recent years, the operating conditions for down coilers have become progressively more severe, such as the winding of IJ tubes becoming wider and thicker, and high-tensile steel IJ tubes being wound at increasingly high speeds. Therefore, the strength and rigidity of downwheelers have been increased, and the size of the downwheelers has also increased.

Among the structural members, some of the winding roller frame units in particular weigh up to 5 to 6 tons.

Figures 1 to 4 show an enlarged view of part 8 in Figure 1, which shows the center front cross section of the main part of an example of a conventional down coiler, its A-A arrow view, the plane, and the state of the coil winding start. Each is shown below.

An overview of the configuration and functions of the down coiler will be explained based on these figures. (In the figure, 1 is a winding mandrel, 2 is a winding roller frame unit of multiple sets (3 sets in the illustrated case) arranged in parallel around the outer periphery of the winding mandrel, a winding roller 3, a circular guide 4, A pair of opposing winding roller blocks 5, a pair of spring shock absorbers 6 for the winding roller 3, a pair of swinging frames 7, a cylinder 8 for pressing the frame, and a cylinder 8 installed between the frames 7 to which the cylinder 8 is connected. It consists of a connecting beam 9, a pair of gap setting devices 10, a connecting beam 11, and a common shaft rod 12, and the coiler housing 13 is connected at both ends of the shaft rod 12.
It is pivotally connected to the shaft via a bearing 13a so as to be freely swingable. Also,
The winding p-ra 3 is rotatably supported by a roller block 5, and the roller block 5 is pivotally connected to a swing frame 7 via a pin 14 with a slight gap between them. has been done. The gap setting device 10 connects the beam 1 via a tensioner 15 and a fluid damper 16, respectively.
7, and both ends of the beam 17 are rotatably supported by a pair of guide pieces 18, as shown in FIG.
The guide piece 18 is slidably engaged with a guide groove 19 protruding inside the coiler housing 13, and the guide piece 18 is connected to a pair of electric jacks 20 fixed to the coiler housing 13 so that the pin 21
connected. These jacks 20 are connected by a tuning shaft 22.

In the figure, 23 is a housing connection beam, 24 is a vinyl roll, 25 is a hot strip, and 2 is a strip traveling direction. Further, although not shown in the drawings, each winding roller 3 and winding mandrel 1 are driven by an electric motor.

Therefore, the strip 25 guided by the pinch wheel 24
is introduced into the gap between the winding mandrel 1, the winding roller 3, and the circular guide 4, which are set in advance at a gap corresponding to the thickness of the winding plate, and is wound into a coil shape in the direction of the arrow Y while being pressed by the pressing cylinder 78. It will be done. Each winding roller frame unit 2 expands (retreats) outward in accordance with an increase in the outer diameter of the coil while pressing the strip 25 with an appropriate pressing force by the pressing cylinder 8.

Here, the tip end 25a of the strip 25 on the mandrel 1
As shown in Figure 4, from the 92nd layer onwards, the IJ is deformed by being pressed by the thickness of the tip, creating a step in the board width direction (perpendicular to the plane of the paper), and reducing the number of winding starts. In the layer, each time the portion 25a passes the winding roller 3, the winding roller 3 is pushed away in the radial direction of the coil via the roller block 5 about the pin 14 as a fulcrum in a very short time. The strip running speed at the beginning of winding is, for example, 300 rn/, 1 for a board thickness of 2.3 cm, 720 m - 1 for a board thickness of 25 cm, but the retraction of the winding roller 3 is The moving speed of
It is extremely fast, that is, its acceleration is extremely large, and its impact force can reach, for example, 180 tons. Since the winding speed is faster when the thin plate is wound at 9 o'clock, this impact force may be larger than that when the thin plate is wound at low speed. Therefore, in order to cope with the above-mentioned impact force, a shock absorber 6 is attached to the swing frame 7, but if a case arises in which this shock force cannot be completely absorbed by this shock absorber 6 alone, the shock force shown in FIG. When the gap t is zero, the back of the roller block 5 is inserted into the swing frame 7, and the roller block 5 swings integrally with the swing frame 7 about the axis of the shaft rod 12.
In this case, the impact force is s of the winding roller frame unit 2.
This will be absorbed by the elastic deformation of the ET component and the shock absorber 6.

Therefore, each component 3 of the winding roller frame unit 2
, 4, 5, 6, 7, 9.12 had no choice but to have a sturdy structure, which resulted in an increase in weight, which in turn further increased the impact force, resulting in a repeating vicious cycle. It has become. Furthermore, in order to wind wide, thick plates, high-strength steel materials, etc., the pressing force of the winding roller 3 is also increased, and as in the illustrated device, a single pressing cylinder/8 is used to wind the central part of the connecting beam 9. In order to apply a pushing force, the connecting beam 9 needs to be a very heavy and sturdy member. On the other hand, when the swing frame 7 swings due to impact force, the impact cover for the tension par 15 of the gap setting device 1° and the sealed oil of the shock absorber 16 provided on the tension par 15 are supplied to the hydraulic circuit (not shown). However, it resists the pressing force of the pressing cylinder 8 and retreats following the swinging frame 7 (moves in the direction of separating from the outer periphery of the winding mandrel 1). Need multiple connecting beams 1
1 also needs to be strong, which also contributes to the increase in weight. Therefore, the above-mentioned step) IJ knob tip end and insertion part 2
5a The strip is struck by the winding roller 3 with a force approximately equal to the striking force, and a flaw called a head end mark occurs on the strip surface, and several layers at the beginning of the wound coil are of poor quality. In addition to lowering the yield of rolled products, the down coiler equipment also has drawbacks such as increased cost.

Therefore, as a countermeasure, conventionally, an electric-hydraulic control system has been introduced to prevent the generation of impact force at the stepped portion caused by the strip tip before the stepped portion reaches the winding roller 3. Then, the winding roller is moved back by a required amount (dimension slightly larger than the plate thickness), and the winding roller is pressed against the outer surface of the wound coil immediately after the stepped portion passes through the winding roller portion. 1. Rapid opening/closing position control means is adopted. However, if the electric-hydraulic sensor is a control device,
A number of detectors, such as winding roller position detectors (e.g. rotary detectors) as well as strip position measuring trigger detectors, must be installed in the coiler housing 13 or in its inner area; The atmosphere is extremely adverse, with high temperatures and high humidity, scattering of cooling water and fine scale powder, generation of vibration, and narrow installation space, which shortens the lifespan of each of the detectors and requires a great deal of effort for inspection and maintenance. This method has drawbacks such as time-consuming process, decreased productivity, and increased maintenance costs.

The present invention eliminates the above-mentioned drawbacks, reduces the inertial load and impact force of the winding roller frame unit, and improves the quick opening/closing operation of the winding roller by using a simple, lightweight, winding roller frame unit. The purpose of this invention is to provide a godown coiler that can prevent head end marks.

The present invention achieves the above object by swingably supporting a plurality of swinging frames each including a winding roller that presses a strip material to be wound around a winding mandrel against the winding mandrel, and wherein the winding roller A frame swinging cylinder that applies a pressing force to the strip plate material side is connected to each swinging frame, and a position control cylinder and a sensor provided separately from the frame swinging cylinder are provided. Valves and the like are connected in series to form a hydraulic circuit, and the server controls the position of the winding roller by swinging the swing frame according to the winding status of the strip material onto the winding mandrel. It is characterized in that the valve is equipped with a control means for controlling hydraulic pressure to the position control cylinder and the frame swing cylinder.

Hereinafter, a down coiler according to the present invention will be described in detail based on an embodiment shown in the drawings.

FIG. 5 schematically shows a central cross section along the front of a down coiler according to an embodiment, FIG. 6 shows a view taken along the line C-C, and FIG. 7 shows a hydraulic circuit of the down coiler. . In addition, when explaining the structure, the same members as those in the conventional down coiler shown in FIGS. 1 to 3 are indicated by the same reference numerals, and the explanation thereof will be omitted.

As shown in the figure, multiple sets of winding roller frame units 30 (
The illustrated set includes a pair of side frames 31 that are arranged in parallel to face each other on both the left and right sides of the strip 25, a shaft rod 12 that connects the upper part of the side frame, a beam member 32 that connects the lower part of the side frame, and a circular guide. 4, and a winding roller 3 rotatably supported by a side frame 31 via a bearing 3a. is pivotally supported via both ends of the On the other hand, one end of a piston rod 34a of a pair of double-rod type hydraulic frame swinging cylinders 34 mounted on a trunnion to the coiler housing connection beam 23 is connected to the tip of the side frame 31 by a pin 35. . The piston rod on the opposite side of the frame rocking cylinder 34 is free. By the operation of the pair of frame swinging cylinders 34, the winding roller frame unit 30 swings relative to the winding mandrel 1 with the shaft 12 as a fulcrum. Coiler housing 1
A third double-rod type hydraulic position control cylinder 36 having the same piston stroke volume as the swing cylinder 34 is fixedly mounted on the base 37 in the vicinity of the swing cylinder 34 . A beam-shaped position detector (for example, Inductosin (trade name)) 38 is installed on a base 37 at the end of one piston rod 36a of the position control cylinder 36.

Further, when the piston rod 36m protrudes by a predetermined stroke (leftward in FIG. 7), the piston rod 36a comes into contact with the limit switch 3, which detects this.
9 is provided on the base 37 side. Through these, it is detected that the winding roller frame unit 30 is at the lower limit position of retraction. The pair of frame swinging cylinders 34 and the position control cylinder 36 constitute a series hydraulic circuit in which a valve 40 is included.

The valve 40 is connected to the position control cylinder 36 and one of the frame rocking cylinders 34 through pipes 46 and 49, and is connected to the cylinder 34 for swinging the frame through pipes 46 and 49. It is connected to an oil tank 42 and a hydraulic pump 41 connected to the oil tank 42 via. Further, an electric-hydraulic sensor serving as a control means for the sensor valve 40 is connected to the output side of a computing unit 44 via a control device 43. Note that it is desirable that the sensor valve be provided at a position close to the position control cylinder 36. In the figure, 47 is a position control cylinder 36 and a frame swing cylinder 34.
A conduit 48 connects the two frame swinging cylinders 34 in series.

Next, the operation of the winding roller frame unit 30 at the time of strip winding 9 in the down coiler having the above structure will be explained.

First, prior to the start of winding, the displacement of the piston rod 36a of the position control cylinder 36 at the enlarged position of the winding mandrel 1 and the position where each winding roller 3 contacts is read by the IJ near type position detector 38. Set this value to zero.

Next, it is necessary to set a gap between the mandrel 1 and each winding roller 3 corresponding to the strip thickness. By inputting the plate thickness and strip threading speed, the required displacement amount (stroke) of the position control cylinder 360 can be easily calculated from the dimensions of each component of the plate, plate thickness, and strip threading speed, and the setting signal is sent to the electric-hydraulic server. is sent to the control device 43, the valve 40 is operated, each frame rocking cylinder 34 is rocked by a predetermined amount, and the gap is set. When the valve 40 is actuated, an amount of hydraulic oil corresponding to the set displacement amount is supplied to one side of the piston 36b of the position control cylinder 36 through the pipe 46 as shown in the figure, and the piston 36b in the direction of the arrow a, an amount of oil equal to the above-mentioned inflow amount flows from the pipe 47 into one frame rocking cylinder (the left cylinder in the figure) 34, and the piston 34b moves in the direction of the arrow. At the same time, the same amount of oil flows from the pipe 48 to the other frame rocking cylinder (the one on the right side in the figure) 34, and the same amount of oil flows through the pipe 49 to the cylinder 34. pal f4
It returns to the oil tank 42 from the T port 0 through the pipe line 50.

As a result, the left and right piston rods 34 move the winding roller frame unit 30 in the direction of the arrow at a synchronous speed. That is, the roller frame unit 30 has the shaft rod 1
2 pivots as a fulcrum, and the winding roller 3 retreats (separates) from the mandrel 1 by a set amount. Thus, a predetermined gap can be easily set.

Here, when Sir switches the spool of the valve 40, the hydraulic oil from the valve 40 is supplied to the cylinder 34 on the right side in the figure through the pipe 49, and the position control cylinder 36 and Sir are When the oil is returned from the T port of the valve 40 to the oil tank 42, the wrapping roller frame unit 30 can be swung in the opposite direction.

ffK, the systrip 25 is introduced onto the mandrel 1 by the vinyl roll 24, and winding is started. As the strip coil diameter on the mandrel increases, the pair of frame swinging cylinders 34 move in the direction b in FIG. Then, each wrapping roller frame unit 30 smoothly swings and expands as it moves (retreats) at a synchronous speed while following.

Here, as before, pinch roll (lower roll) 24
Using the timing when the tip of the strip 25 passes through as a starting point, the subsequent length of the strip passing through, the short feed length to reach each winding roller 3, the amount of winding (IJ), the outer diameter of the winding coil, etc. are calculated using a calculator. 44, and the electro-hydraulic sensor sends the necessary control signals to the control device 43.
(S) Before reaching the IJ knob tip and difference portion 25a, each winding roller 3, the frame unit 30 of the winding row 53 is retreated by an amount equivalent to the plate thickness, and immediately after passing, the winding roller 3 is moved back. Head end marks can be easily prevented by rapidly opening and closing the winding roller frame unit 30 so as to press it against the IJJ knob 5. Thus, after winding several layers of strip, if the winding tension is sufficiently established, the winding roller frame unit retreats to a position slightly larger than the jtl coil diameter, that is, to the retraction limit position, and the winding is completed. do.

The above describes the position control action, but the pressing force of the winding roller during winding must be set appropriately.
The hydraulic pump 41 is equipped with a pressure regulator (not shown), and pressure detectors (pressure transmitters) (
(not shown) is installed, and its detection signal is used as a required pressure control signal via the calculator 44 as an electric-hydraulic sensor? Control device 4
Since this can be easily implemented by sending the data to 3, the following explanation will be omitted.

As is clear from the above description, the use of the apparatus of the present invention provides the following advantages. That is, (1) by attaching the swing cylinder directly to the side frame of the swing frame, the reinforcing member of the side frame can be made as strong as the conventional device, and
(There is no need for high rigidity, and as a result, the weight of the member can be reduced and the structure is simple.) Equipment costs are low, and position control can be quickly achieved by reducing the moment of inertia when the take-up roller unit frame swings. sex increases.

(2) There is no need for a mechanical winding roller gap setting device in the conventional device, and weight and equipment costs can be reduced.

(3) Since the winding roller position detector can be installed at a location away from the coiler housing, which has poor environmental conditions, the service life is greatly improved, and the reliability of the control system is increased due to the ease of maintenance and inspection. improves.

(4) In order to prevent the winding roller from being pushed back at the stepped section by the tip of the strip, rapid opening/closing control is performed, so the impact force at the stepped section is greatly reduced and the strip is The production of head end marks is eliminated and the yield of rolled products is improved.

(5) For detecting the position of the winding roller frame unit, an inexpensive near type detector can be used instead of the expensive rotary type position detector used in conventional devices, so equipment costs can be reduced.

(6) Since the swing cylinders are installed on both sides of the swing frame as shown in item (1) above, it is extremely easy to install the winding roller frame unit, unlike the conventional device.

(Force) Since the pair of swinging cylinders operate synchronously, the swinging of the winding roller frame unit does not require a conventional strength member, which combines with the effect of item (1) above to reduce the weight of the swinging member. This can contribute to reducing inertial loads.

[Brief explanation of drawings]

Figure 1 is a central sectional view along the front of the conventional 〆Uncoiler.
FIG. 2 is a view along arrow A-A, FIG. 3 is a plan view, FIG. 4 is an enlarged view of section B in FIG. 1, and FIG. 5 is along the front of a down coiler according to an embodiment of the present invention. A central sectional view, FIG. 6 is a view taken along the line C--C, and FIG. 7 is a hydraulic circuit diagram thereof. In the drawings, 1 is a winding mandrel, 3 is a winding roller, 12 is a shaft rod, 25 is a strip, 30 is a winding roller frame with two knits, 31 is a side frame, 33 is a swinging frame, 34 is a double rond liquid Pressure type frame swing cylinder, 36
38 is a linear position detector, 39 is a limit switch, 40 is a valve, 43 is an electric-hydraulic sensor, and 44 is an arithmetic unit. Patent applicant Mitsubishi Heavy Industries, Ltd. Sub-agent Patent attorney Shibu Hikaruishi (and 1 other person)

Claims (1)

[Claims] A plurality of swinging frames each having a winding roller that presses the strip material to be wound around the winding mandrel against the winding mandrel are swingably supported, and a pressing force is applied to the winding roller toward the strip material side. A frame swinging cylinder is connected to each swinging frame, and the frame swinging cylinder, a separately provided position control cylinder, and a cylinder connect pulp, etc. in series to form a hydraulic circuit. In order to control the position of the winding roller by swinging the swing frame according to the state of winding the strip material onto the mandrel, the servo moves the pulp to the position control cylinder and the frame swing cylinder. A down coiler characterized by being equipped with a control means for controlling hydraulic pressure.