JPS6046853A - Bend straightening device for centrifugal casting metallic flask - Google Patents

Abstract

PURPOSE:To provide a titled device which sprays water only to the desired position of the bending and projecting part of a rotary centrifugal casting metallic flask and straightens the bend thereof by providing water cooling nozzles directed to the outside circumferential surface of the metallic flask in parallel with the axis of said flask and oscillating a baffle plate by means of an arm swiveling synchronously with the metallic flask. CONSTITUTION:A water cooling nozzle array 15 directed to the outside circumferential surface of a centrifugal casting metallic flask 11 under rotation is covered by a baffle plate 22. The plate 22 is moved upward by the movement of an oscillating arm 26. The arm 26 is moved by a specified angle by a swiveling arm 28 which swivels around an eccentric shaft 29 to lift the plate 22. The bending and projecting part of the flask 11 is detected by a sensor 14 and the arm 28 is rotated synchronously with the flask 11, by which the spray water is brought into contact with only the projecting part. The bend of the metallic flask is thus cooled and straightened.

Description

[Detailed description of the invention] The present invention relates to a device for straightening the bending of a centrifugal casting metal frame.

When centrifugally casting cast iron pipes, etc., a centrifugal casting metal frame (2) with a tire (1) as shown in Figs.
Generally, the centrifugally cast metal frame (2) is rotated at high speed on the metal frame (3), but this centrifugally cast metal frame (2) has the problem that it tends to bend as shown by the imaginary line due to thermal expansion and uneven load caused by the molten metal. .

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to correct the bending of a centrifugally cast metal frame based on shrinkage caused by local water cooling.

In order to achieve this object, the present invention provides a Turney J wheeler that rotatably supports the centrifugal casting metal frame, and is capable of detecting the circumferential position and size of the convex portion of the centrifugal casting metal frame. A sensor is provided, and a water cooling nozzle capable of continuously injecting cooling water toward a portion of the circumferential direction of the centrifugal casting metal frame is provided, and based on a signal from the sensor, the cooling water is synchronized with the rotation of the centrifugal casting metal frame. , reciprocating between a position where cooling water from the water cooling nozzle can be cut off and a retreat position other than that;
A baffle plate is provided to allow the cooling water from the water cooling nozzle to reach only the convex portion.

Therefore, only the convex portion of the centrifugal casting metal frame can be locally cooled with water, and only this convex portion can be contracted to correct the bending of the metal bar.

An embodiment of the present invention will be described below. In FIGS. 3 and 4, αD is a centrifugally cast metal frame whose bending is to be corrected, and is supported in the horizontal direction and slowly rotated around the axis by the turning angle α. (to) is a tire. As shown in Figures 1 and 2, the gold frame α
D falls in the center and the degree of curvature increases, so
Sensor α that can detect the amount of deformation in the radial direction of this central part →
is provided. In addition, water cooling nozzles α0...Qυ capable of injecting cooling water toward a part of the circumferential direction of the metal frame αD are installed at both sides in the metal frame axial direction, sandwiching the sensor α. There are multiple locations. αQ is a mounting pipe for the water cooling nozzle (to), and a pair is arranged on both sides of the water cooling nozzle.
A water-cooled nozzle (to) is attached to the attachment branch pipe αη that communicates with the attachment pipe αQ. (to) is the water supply pipe to each attachment pipe αQ. As shown in Fig. 4, there are multiple types of diameters of the metal frame α force to be corrected, but the sensor α metallurgy and water cooling nozzle αQ are designed to minimize the change in position due to the difference in the diameter of these metal frames α◇. , is provided on a line H connecting the axial center of the turning roller α and approximately the midpoint between the axial center position of the metal frame with the smallest diameter and the axial center position of the metal frame with the largest diameter. It is also possible to adjust the mounting angle if necessary.

In the vicinity of the mounting pipe 0Q, there is provided a rotation shaft QD in the axial direction of the metal frame, which is rotatably supported by a bearing rod on the support base 0. A baffle plate (A) with an angular cross-section is attached to this rotation shaft (Q), and a bent portion (A) at the tip of this baffle plate (A) is used to rotate the rotation shaft (21). By swinging based on this, it is possible to reciprocate between a position (c) where cooling water from the water cooling nozzle (to) can be cut off and a retracted position (a) other than this position (c).

That is, as shown in Figs. 4 and 5, the rotation axis (b)
A swinging arm (C) is fixed at a proper position, and a vinyl 7@ is attached to the tip of this swinging arm (E). This swinging arm) and the baffle plate (A) are moved by their own weight or a biasing device such as a spring into the state shown by the solid lines in FIGS. ) is always energized so that it is in the position (c) where it can shut off the cooling water. (c) is a swing arm that can swing around the shaft center at a position eccentric from the axis of the swing axis Q0, and the tip (1) of this swing arm (c) is locked to the above-mentioned pin J@. The swing arm (c) is configured to swing. Here, since the axis of the rotating shaft (B) and the axis of the rotating arm are eccentric, the tip (to)
Binding-J@ is locked only within a certain range, and when it reaches the position shown by the imaginary line, the lock is released, and the swinging arm (c) continues to rotate, while the swinging arm (c) It returns to the original position shown by the solid line.

Centrifugal casting metal frame α still at high temperature after casting work is completed
In order to correct the bending of D, the metal frame U to be corrected is supported by a turning roller (A) and slowly rotated. Then, the sensor α detects the circumferential position and size of the bent portion of the metal frame OD. Therefore, the rotating arm (c) is rotated in synchronization with the rotation of the metal frame αD by the signal from the sensor a4, and when the convex target part of the metal rod at 0°C faces the water cooling nozzle (to), the rotating arm (c) is rotated in synchronization with the rotation of the metal frame αD. ) is controlled so that the tip (to) is locked to the pin (b) (5).

If cooling water is constantly injected from the water cooling nozzle (to), this cooling water is normally blocked by the bent portion (c) of the baffle plate (support) and does not reach the metal frame 01). However, after the tip (to) of the swing arm is locked with the pin (c), the baffle plate (a) is moved toward the waiting wall position (c) by the swinging of the swing arm (c). Cooling water is injected toward the convex target portion to cool the convex target portion. After this, when the swing arm (C) further swings and its tip (to) is released from the pin (A), the baffle plate (A) is forced back to its original position and the cooling water is released. cut off.

Therefore, when the metal frame Ql) continues to rotate, the cooling water is intermittently injected only towards the convex target portion of the metal frame Ql),
This convex target portion is cooled and contracted to correct it. The device will stop when the magnitude of the bend falls within the set tolerance range.

After that, the entire metal frame αD is temperature-controlled and water-cooled by a cooling (temperature-controlling) water-cooling device provided separately from this device.
Prepared for the next casting operation. In addition, if you stop the rotation of the swing arm (E) (6) when the baffle plate) is in the retracted position (c) and rotate only the metal frame 01), the entire circumference of the metal frame 01) can be rotated. Cooling water can be injected using this device, and temperature-controlled water cooling is also possible with this device.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the bending of a centrifugally cast metal frame, Fig. 2 is a side view thereof, Fig. 3 is a plan view of an embodiment of the present invention, Fig. 4 is a side view thereof, and Fig. 5 is a side view thereof. This is an enlarged view of the main part of Figure 4. 01)...Centrifugal casting metal frame, (c)...Turning roller, 04)...Sensor, +161...Water cooling nozzle, (
b)... Baffle plate, ■... Capable of blocking cooling water 1a
% (c)...Retreat position, (c)...swing arm,
(B)...Pin, Q→...Swivel arm agent Mori
Yoshihiro Moto

Claims (1)

[Claims] 1. Provide a turning roller that rotatably supports the centrifugal casting metal frame, and provide a sensor capable of detecting the circumferential position and size of the convex facing portion of the centrifugal casting metal frame, and A water-cooled nozzle capable of continuously injecting cooling water toward a portion in a circumferential direction is provided, and based on a signal from the sensor, cooling water from the water-cooled nozzle is shut off in synchronization with the rotation of the centrifugal casting metal frame. A centrifugally cast metal frame, characterized in that it is provided with a baffle plate that moves back and forth between a possible position and a retreat position other than that, and allows cooling water from the water cooling nozzle to reach only the convex portion. bend straightening device.