JP3202313B2 - Conveyor bucket for semi-solid metal processing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in the so-called thixoforging method, in which a raw metal at room temperature is heated to a semi-molten state and then flowed and filled into a mold using a punch and a die.

[0002]

2. Description of the Related Art Various types of transfer devices adopted for the thixoforging method have been proposed in Japanese Patent Publication No. 2-7748. The transfer device described in this publication has the following configuration. That is, the billet is pinched by the two gripping arms, and the billet is conveyed by rotating the rotating arm while holding the billet to the die hole, where the two gripping arms are loosened and the billet is put into the die hole.

[0003]

However, in this apparatus, there is a step of gripping the billet, so that there is a limit in shortening the transport time. This is because it takes some time for the two gripping arms to grip the billet.

The present invention has been made in view of the above circumstances, and an object of the present invention is to reduce the time from the end of heating to the time of pressurizing in a die as much as possible. Is to shorten it.

[0005]

In order to achieve the above object, the present invention provides a transport bucket for scooping a billet of a material heated to a semi-molten state from a support table and transferring the billet to a molding machine. The tip inserted between the table and
A chamfered rake plate is characterized in that is constituted by a backrest mounted on the rake plate.

[0006]

When the billet B placed on the support 2b of the heating conveyor 2 is heated to a semi-molten state, the bucket 4d, which stands by near the billet B, makes the rake plate 4e horizontal to support the support 2b. And the billet B are entered from the lateral direction, and the billet B is scooped up on the rake plate 4e.
Further, the bucket 4d continues to move in the horizontal direction and transports the billet B to the die hole 3d.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. In the figure, reference numeral 1 denotes a semi-molten metal forging machine, which is a heating conveyor 2 for heating a material, a molding machine 3 for plastically deforming and forming an aluminum alloy material, and a molding machine 3 for heating the heated material from the heating conveyor 2. And a transfer robot 4 for transferring the data to a transfer robot.

The heating conveyor 2 has a number of stainless steel transfer pallets 2a connected by a chain. A support 2b for supporting the billet B is provided on the transport pallet 2a, and is intermittently transported by a motor (not shown). Reference numeral 2c denotes a plurality of coils for high-frequency induction heating installed on the upper portion of the heating conveyor 2, which are provided so as to be able to move up and down.

As shown in FIG. 3, the molding machine 3 includes a die 3a for receiving the heated billet B, a punch 3b for pressing the billet B inserted into the die, and a mold 3c to which the material flows. Frame F provided. The die 3a has a circular die hole 3d cooperating with the punch 3b.
And a liner 3 opened at the center of the bottom of the die hole 3d.
e. The liner 3e forms a flow path for the semi-molten material metal to be pressed by the punch 3b and flow therethrough. The liner 3e has a vertical portion extending downward from the die hole 3d and a plurality of branching portions extending from the vicinity of the bottom and extending laterally. The horizontal portion communicates with a cavity 3h to be described later via a gate 3f. The mold 3c is divided into left and right parts by being supported by two bar guides on the left and right supported by the frame F.

Therefore, according to this embodiment, the billets B as the raw materials are placed one by one on the support 2b of the heating conveyor 2. The support 2b moves and stops intermittently at preset time intervals. And the transport pallet 2
Each time a stops, the coil 2c descends to perform induction heating from the outer periphery of the billet B. When the transport pallet 2a moves, the heating is interrupted and retracted upward. In this way, the billet B is heated to a temperature at which the billet B crosses the solidus of the material and reaches a semi-molten state in which the liquid phase and the solid phase are mixed before reaching the final step.

The transfer robot 4 is installed near the last step of the heating conveyor 2 and transfers the heated billet B from the transfer pallet 2a to the molding machine 3. That is, the transport robot 4 includes a support shaft 4a that supports the axis in a vertical direction,
An elongated support cylinder 4b extends radially from the support cylinder 4b. The support cylinder 4b supports the telescopic arm 4c so as to be able to rotate and expand and contract. The tip of the telescopic arm 4c is provided with a bucket 4d for scooping up the billet B. Bucket 4d, as shown in Figure 6, is made of heat-resistant metal such as stainless steel plate, the tip is composed of more and thinner rake plate 4e which is chamfered, the backrest 4f erected there. In this embodiment, the backrest 4f is formed of a stainless steel plate as the rake plate 4e as a semi-circular side wall, but instead, for example, a plurality of bar-shaped members may be erected. . Incidentally, the rake plate 4e is the tip are chamfered, when the scoop billet B, it is possible to scoop while scraping the oxide film formed on the lower surface of the billet B.

Therefore, the transfer robot 4 first has the telescopic arm 4c.
Is extended, and the bucket 4d is made to stand by at the position (1) in FIG. 2 until heating is completed and the coil 2c retreats upward, and is preheated by the leakage magnetism of the coil 2c. When the billet B is heated to a semi-molten state, the coil 2c retracts upward. Then, the support shaft 4a is rotated and the thin rake plate 4e of the bucket 4d provided at the tip is quickly pushed into the space between the lower surface of the billet B as a material and the support base 2b of the transport pallet for supporting the same (FIG. 7). Then, the support shaft 4a is rotated to the position indicated by (2) to move the bucket 4d onto the molding machine 3. When the bucket 4d reaches above the die hole 3d, as shown in FIGS. 3 and 8, the telescopic arm 4c rotates the bucket 4d toward the backrest 4f to reverse the billet B, so that the billet B is placed on the rake plate 4e . It slides on the standing backrest 4f and falls into the die hole 3d.

The billet B is heated to a semi-molten state by the heating conveyor 2 and reaches the process end. During this time, the upper part of the material gradually flows downward by its own weight, and the upper part becomes thinner and the lower part becomes thicker. ing. Therefore, although the outer shape of the billet B is made smaller in advance than the die hole 3d, it is difficult to insert the billet B into the die hole 3d. The side narrowed by the deformation as in this embodiment is the die hole 3d.
If it is inserted toward, insertion is rather easy because the tip is thin, and the above-mentioned problem is eliminated.

On the other hand, while the transfer robot 4 is transferring the billet B to the die hole 3d, on the heating conveyor 2,
The transport pallet 2a is sent by one step, and heating is performed by the coil 2c. Therefore, if the bucket 4d after the transfer is not to return to the original standby position again, the coil 2d
c, the telescopic arm 4c is retracted into the support cylinder 4b, and the support shaft 4a is rotated. When the telescopic arm 4c returns to the initial position shown in (1), the telescopic arm 4c is advanced again, and the coil 2c is moved.
And wait for the billet B to reach a predetermined high temperature.

[0015]

As described above, according to the present invention, a transport bucket for transferring a billet of a material heated to a semi-molten state to a molding machine is provided on a rake plate having a chamfered tip and a rake plate. It consists of an attached backrest and the billet is scooped while moving the transport bucket in the horizontal direction.When scooping the billet, it is formed on the underside of the billet.
The oxidized film with a rake plate with a chamfered tip
Can be scooped while being oxidized as an impurity during molding
Not only can the film be prevented from being mixed, but also the billet can be caught and transported at the same time, and the transport time can be reduced. Also, since the structure of the transport bucket is very simple,
This can be made to stand by near the heated billet, so that the transport distance can be shortened, and as a result, the transport time can be shortened.

[Brief description of the drawings]

FIG. 1 is a front view of a semi-solid metal forging machine.

FIG. 2 is a plan view of FIG.

FIG. 3 is a sectional view taken along the line III-III of FIG. 2;

4 is a side view of the transfer robot 4. FIG.

5 is a plan view of the transfer robot 4. FIG.

FIG. 6 is a sectional view taken along the line VI-VI in FIG. 2;

FIG. 7 is a sectional view corresponding to FIG. 6, showing a step subsequent to that of FIG. 6;

8 is a sectional view taken along the line VIII-VIII in FIG.

[Explanation of symbols]

 2b ... support base 3d ... die hole 4b ... support cylinder 4c ... telescopic arm 4d ... bucket 4e ... rake plate 4f ... backrest

Claims (1)

(57) [Claims] 1. A transport bucket for scooping a billet of a material heated to a semi-molten state from a support and transporting the billet to a molding machine, wherein a tip inserted between the billet and the support is a face.
Take been scooping plate and the conveying bucket semi-solid metal processing machine comprising constituted by a backrest mounted on the rake plate.