JPS585743B2 - Drawing device of centrifugal casting equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a drawing device for a centrifugal casting machine.

In conventional centrifugal one-manufacturing equipment, the rotating metal frame generally moves in the direction of its axis, and the device that pulls out the casting tube from the rotating metal frame is connected to other devices such as the front cover mounting device. Basically, it consists of a chucking device fixedly installed at a predetermined position, and the tube is pulled out by the movement of the rotating metal frame, and the pulled out tube is removed after the rotating metal frame has moved. The pipe was supported by a rotating wheel stand that protruded downward from the tube, and when the extraction was completed, it was rolled on this turning wheel stand and carried out to the side.

By the way, from the perspective of further improving productivity, the advantages of centrifugal casting equipment using a stationary rotating metal frame with the rotating metal frame installed at a predetermined position are being reconsidered. No device has been proposed to efficiently pull out a cast tube from a rotary metal frame.

In view of these circumstances, the present invention aims to provide a drawing device that can efficiently draw out a tube from a stationary rotating metal frame, and one embodiment thereof will be described below with reference to the drawings.

In FIGS. 1 to 4, 1 is a rotating metal frame, 2 is a heat treatment furnace as a device into which the tube P pulled out from the rotating metal frame 1 is transported, and the tube loading chamber 3 and the rotating metal frame 1 are shown in FIG. are placed on the line.

4 is in front. This is a guide rail laid between one end 1a of the rotary metal frame 1 and the outside position of the opposite end of the rotary metal frame 1 through the inside of the pipe introduction chamber 3, and the pipe moves along the guide rail 4. A pull-out trolley 5 is freely provided.

The pull-out truck 5 is driven by a drive device (not shown) provided with a winding drum disposed at the outer end of the guide rail 4 in the figure.

As shown in FIG. 5, the pull-out cart 5 has a lifting platform 7 that can be raised and lowered via a link mechanism 6, and a support platform 8 is mounted on the lifting platform 7 via a bracket 9, a support shaft 10, and a bracket 11.
is supported so as to be able to swing slightly.

Next, a chucking device 28 provided on this support base B
To explain, 12 is a pair of bearings 13a on the support base 8.
, 13b, which extends in the direction of movement of the pull-out cart 5, and at one end 12a on the side of the rotating metal frame 1,
Base ends of a plurality of open/close arms 14 arranged in the circumferential direction are pivotally supported by brackets 15 and pins 16.

17 is a protective cover for this pivot.

Reference numeral 18 denotes an operating shaft that is inserted and supported by the rotary cylinder shaft 12 so as to be able to rotate relative to it and slide in the axial direction.
A bracket 19 that is relatively rotatably attached to a and the vicinity of the free end of the opening/closing arm 14 are connected by a link 20.

A contact member 21 is swingably attached to the free end of the opening/closing arm 14, and is pressed against the inner surface of the socket of the pipe P to grip the pipe P.

The other end of the operating shaft 18 is connected to a cylinder device 22.

Reference numeral 23 denotes a pulley provided at the rear end of the support base 8, and both ends of a wire 24 wound around the pulley are wound around the winding drum of the drive device. Reference numeral 25 denotes a bracket protruding from the lower surface of the pull-out cart 5. A wire 26 connected thereto is wound around the winding drum with the winding direction reversed via a sheave (not shown) disposed near one end 1a of the rotating metal frame.

Reference numeral 27 is a bolt for restricting the swing of the support base 8.Next, returning to FIG. , respectively have support rollers 31a and 32a.

These tube carriers are movable along a guide rail 30 laid concentrically with the guide rail 4.
A portion 30a adjacent to one end 1a of the rotating metal frame 0 is provided on a lifting platform 35 of a lifting device 34 installed in the pit 33.

When the lifting platform 35 is in the lowered state, the tube support carts 31 and 32 supported thereon are completely retracted into the pit 33, and the pull-out cart 5 is positioned above it and chucks the pipe P in the rotating metal frame 1. It is now ready to be gripped by the device.

Reference numeral 36 denotes an engaging protrusion protruding from the end of the tube holder cart 31 opposite to the rotating metal frame 1, and 37 indicates an engaging protrusion protruding from the end of the drawing cart 5 on the rotating metal frame 1 side so as to be able to engage with the engaging protrusion 36. The provided engagement member is pivotable upward to a non-engagement position.

Next, to explain the operation, when the casting is completed in the rotating metal frame 1, the drawing carriage 5 is moved towards the rotating metal frame 1 with the tube carriers 31 and 32 retracted into the pit 33 as shown in FIG. The opening/closing arm 14 is moved and stopped at a position where the tip of the opening/closing arm 14 is inserted into the socket of the pipe P, and then the operating shaft 18 is pushed to open the opening/closing arm 14 and chuck the pipe P.

At this time, the pipe P can be chucked even when the rotary metal frame 1 is rotated.

Next, the extraction cart 5 is moved backward in a direction in which the rotary metal frame 1 is also separated, and the pipe P is also pulled out from the rotary metal frame 1.

As shown in FIG. 2, when the pulling truck 5 passes over the pit 33 after being pulled out for a predetermined length, the lifting platform 35 rises and the tube carriers 31, 3
2 becomes movable on the guide rail 30a*30,
In addition, the engagement protrusion 36 of the tube support carriage 31 and the engagement member 37 of the extraction carriage 5 engage with each other.

In this state, the support rollers 31a, 3 of the tube carriers 31, 32
There is a slight gap between 1b and the pipe P.

When the pull-out cart 5 further moves backward, the rotating metal frame 1
can no longer be supported in its entirety, and the socket side of the pipe P moves downward and is supported by the pipe support carriage 31.

At this time, the tube support cart 31 engages with the pull-out cart 5 and moves together, so that the vicinity of the socket of the pipe P can be reliably supported, while the tube support cart 32 remains at its original position.

When the tube P is pulled out until the insertion end of the tube P corresponds to the socket of the rotary metal frame 1 as shown in FIG. The tube P is supported near both ends by the tube support carts 31 and 32 and moves as the drawing cart 5 moves backward, and is carried into the loading chamber 3 of the heat treatment furnace 2 as shown in FIG. 4.

Here, the engagement member 37 of the pull-out truck 5 is rotated upward by appropriate means to release the engagement, and then only the pull-out truck 5 moves to a position outside the loading chamber 3.

In the embodiment, since the chucking device 40 is rotatable, chucking can be performed while the rotary metal frame 1 is rotating without having to wait until the rotary metal frame 1 stops rotating. Since the tube P can rotate due to inertia on the tube carriers 31 and 32, it is possible to prevent the tube P from becoming oval even during the drawing process.

According to the drawing device of the present invention, as is clear from the above description, the pipe can be pulled out by chucking the pipe in the stationary rotating metal frame and moving the drawing cart, and the drawn pipe can be supported by the tube support truck, and since the tube support truck is retracted at the beginning of the chucking and pulling operations by the extraction truck, there will be no interference with each other.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIGS. 1 to 4 are front views showing the tube drawing process, and FIG. 5 is a partially sectional front view showing details of the drawing cart. 1...Rotary metal frame, 2...Heat treatment furnace, 3
... Loading room, 4 ... Guide rail, 5.
... Pulling cart, 7 ... Elevating platform, 8 ...
...Support stand, 12...Rotating cylinder shaft, 14...
... Opening/closing arm, 18... Operation axis, 19...
...Bracket, 20...Link, 21.
...Abutting member, 28...Chucking device, 30...Guide rail, 31, 32...
...Pipe support cart, 33...Pit, 34...
... Lifting device, 35... Lifting platform.

Claims (1)

[Claims] 1. A pull-out truck is provided that is capable of moving toward and away from one end of the metal frame in the axial direction of the metal frame and is equipped with a chucking device for gripping the tube, and the pulled-out tube is held between the pull-out truck and the metal frame. Drawing of a centrifugal casting apparatus, characterized in that a supporting tube support car is movably provided, and an elevating device is provided near one end of the metal frame to support the tube support car and retract it below the movement path of the drawing car. Device.