JPH06209Y2 - Casting gate cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a cutting device for cutting a runner or a weir of a casting (hereinafter referred to as a gate portion).

(Prior Art) Conventionally, the cutting of a gate portion of a casting has been generally performed using a cutting grinder or a saw.

(Problems to be solved by the invention) When cutting a casting gate using a cutting lidar or a saw, it is difficult to shorten the cutting time of the casting gate, and the cutting cycle is difficult. However, there is a problem that the cutting length becomes long and the cutting chips are generated in a large amount due to the cutting.

In view of the above-mentioned conventional problems, an object of the present invention is to efficiently cut a gate portion of a casting, shorten the cutting cycle as much as possible, and achieve mass production of the casting. It is an object of the present invention to provide a cutting device for a casting gate, which can reduce the occurrence of

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a fixed body and a movable body arranged so as to be movable back and forth with respect to the fixed body.
A pair of clamp bodies for projecting the cast gate portion and clamping the product portion are provided, and a pair of cutting blades that face the gate portion so as to come in contact with and separate from the gate portion and cut the gate portion are provided. Of the two cutting blades, one cutting blade is provided integrally with the movable body, the other cutting blade is provided so as to be capable of advancing and retreating to the fixed body, and further, between the other cutting blade and the movable body, An interlocking mechanism is provided for advancing and retracting the other cutting blade in conjunction with the forward / backward movement of the movable body so that both cutting blades are brought into contact with each other to cut the gate portion when the gate portion is cut.

(Operation) In the casting gate cutting device configured as described above, when the movable body advances with respect to the fixed body, one cutting blade is advanced integrally with the movable body toward the gate portion of the casting. As the movable body advances, the cutting blade on the fixed body side is advanced toward the gate portion by the interlocking mechanism. Then, when cutting the gate portion where the movable body reaches the forward end, the gate portion is cut by bringing the both cutting blades into contact with each other.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, a plurality of guide posts 3 are provided upright at the corners of the upper surface of a fixed body 2 mounted on a bolster 1 of a press machine.

A guide bush 6 into which each guide post 3 of the fixed body 2 is inserted is provided on a movable body 5 mounted on the lower surface of the press ram 4 above the fixed body 2.
Then, in a state where the guide post 3 and the guide bush 6 are fitted, the movable body 5 is pressed against the fixed body 2 by the press ram 4.
It is driven up and down by.

Between the fixed body 2 and the movable body 5, the gate portion Wb of the casting W is projected in the lateral direction (horizontal direction) so that the product portion W thereof is formed.
A pair of upper and lower clamp bodies 7 and 8 for clamping a is provided.

The lower clamp body 7 is fixed to the upper surface of the fixed body 2 integrally with the fixed body 2, and the clamp surface 7 for positioning and supporting the lower portion of the product portion Wa of the casting W on the upper surface of the clamp body 7.
a is formed.

The upper clamp body 8 is supported on the lower surface of the movable body 5 by a pin 9 and a bush 10 so as to be vertically movable, and is always urged in a downward clamp direction by a spring 11. When the movable body 5 is at the top dead center position as shown in FIG. 1, the upper clamp body 8 has the flange 9a at the tip of the pin 9 in contact with the stepped surface at the opening end of the bush 10 inner hole. Supported by. Further, a clamp surface 8a for pressing the upper part of the product portion Wa of the casting W is formed on the lower surface of the upper clamp body 8.

The fixed body 2 and the movable body 5 are opposed to each other above and below the gate portion Wb of the casting W clamped by the pair of clamp bodies 7 and 8 so as to come in contact with and separate from the gate portion Wb, and cut the gate portion Wb. Cutting blades 12 and 13 are provided.

The upper cutting blade 13 is fixed to the lower surface of the movable body and is moved up and down together with the movable body 5. The lower cutting blade 12 is supported by a guide member 14 provided on the fixed body 2 so as to be able to move up and down. Further, an interlocking mechanism 15 is provided between the lower cutting blade 12 and the movable body 5 to move the lower cutting blade 12 up and down in association with the vertical movement of the movable body 5. In this interlocking mechanism 15, an interlocking lever 17 is attached to a support member 16 erected on the fixed body 2 at a central portion in the longitudinal direction thereof.
It is attached so as to be rotatable around a horizontal support pin 18 as a fulcrum. One end of the interlocking lever 17 and the upper portion of the lower cutting blade 7 are connected by a connecting pin 19 and a lateral elongated hole (not shown). On the other hand, the operating member 20 is fixed to the lower surface of the movable body 5 in a hanging shape. This operating member 2
0 faces the other end of the interlocking lever 17 so that it can come into contact with and separate from the other end, and as the movable body 5 descends, the interlocking lever 17 is rotated clockwise in FIG. Has become.

In this embodiment, both upper and lower cutting blades 12, 1
No. 3 is coated with a molybdenum disulfide-based lubricant, and this lubricant prevents the constituent cutting edge due to the adhesion of the cast piece during cutting.

This embodiment is constructed as described above. Therefore,
As shown in FIG. 1, when the movable body 5 is at the top dead center, the product portion W of the casting W in the hot state taken out from the mold.
a is positioned and placed on the clamp surface 7a of the clamp body 7 of the fixed body 2 by an appropriate automatic conveying means. After that, the movable body 5 is lowered toward the fixed body 2 by the press ram 4. As the movable body 5 descends, first, as shown in FIG. 2, the clamp surface 8a of the clamp body 8 of the movable body 5 is moved.
After contacting the product part Wa of the casting W, the movable body 5 moves to the spring 1
It moves down while compressing 1. The product force Wa of the casting W is firmly clamped between the clamp bodies 7 and 8 by the elastic force of the compressed spring 11.

On the other hand, as shown in FIG. 2, almost simultaneously with the clamp body 8 of the movable body 5 contacting the product portion Wa of the casting W, the lower end surface of the operating member 20 of the movable body 5 becomes the end portion of the interlocking lever 17. Abut. As the movable body 5 continues to descend, the interlocking lever 17 is rotated clockwise about the support pin 18 in FIG. As a result, the lower cutting blade 12 faces the upper cutting blade 13 descending toward the gate portion Wb of the casting W integrally with the movable body 5, and is raised at substantially the same speed. Further, as shown in FIG. 3, when the cutting edge of the upper cutting blade 13 comes into contact with the upper surface of the gate portion Wb of the casting W, at the same time as this, the cutting edge of the lower cutting blade 12 comes to the lower surface of the gate portion Wb. Abut.
Then, as shown in FIG. 4, when the movable body 5 reaches the bottom dead center, the cutting edges of the upper and lower cutting blades 12 and 13 are brought into contact with each other to cut the gate portion Wb of the casting W.

After that, the movable body 5 is raised to the original top dead center position. Then, the product portion Wa of the casting W left on the clamp body 7 of the fixed body 2 is taken out by an appropriate automatic carry-out means, and one cycle of cutting the casting gate is completed. Also,
Although the lower cutting blade 12 is lowered to its original position by its own weight, the lower cutting blade 12 may be positively lowered to its original position by a return spring.

As described above, the gate portion Wb of the casting W in the hot state
On the other hand, by raising and lowering the pair of cutting blades 12 and 13 at approximately the same speed to bring them into contact with each other, the gate portion Wa of the casting W can be quickly cut, and the generation of chips is extremely small.

In the modification shown in FIG. 5, the interlocking mechanism 15 for vertically moving the lower cutting blade 12 supported by the fixed body 2 so as to be vertically movable is constituted by a cam mechanism. That is, the operation cam 21 is arranged on the lower surface of the movable body 5, and the slide cam 22 is moved forward on the fixed body 2 as the operation cam 21 descends and is always arranged at the retracted position by the biasing force of the spring. Are arranged so that they can move forward and backward. A cam surface corresponding to the cam surface 22a of the slide cam 22 is formed on the lower part of the lower cutting blade 12, and is raised as the slide cam 22 advances. The other parts are constructed in the same manner as the above-mentioned embodiment. Therefore, also in this modified example, the gate portion of the casting is cut in substantially the same manner as the above-described embodiment.

Further, in the above-described embodiment, the movable body 5 is configured to be able to move up and down above the fixed body 2, but the present invention is not limited to this.
The fixed body 2 and the movable body 5 may be disposed so as to face each other on the left and right, and the movable body 5 may be configured to be capable of moving forward and backward with respect to the fixed body 2.

(Effect of the Invention) As described above, according to the present invention, the gate of the cast product is clamped in a state in which the product part of the cast product is clamped by the pair of clamp bodies arranged between the fixed body and the movable body. One cutting blade that advances integrally with the movable body toward the section, and the other cutting blade that is advanced by the interlocking mechanism as the movable body advances, during cutting when the movable body reaches the forward end,
The gate portion can be cut by abutting. As a result, the gate portion of the casting can be cut quickly and efficiently, the cutting cycle can be shortened as much as possible, mass production can be achieved, and the generation of cutting chips can be reduced. And so on.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a front view showing a state where a casting is set on a clamp body of a fixed body by partially breaking it, and FIG. FIG. 3 is a partially cutaway front view showing the initial state where the product portion is clamped, and FIG. 3 is a partially cutaway front view showing the state where the cutting edges of both cutting blades are in contact with the upper and lower parts of the gate portion of the casting. ,
FIG. 4 is a partially cutaway front view showing a state in which the movable body is lowered to the bottom dead center and the gate portion of the casting is cut by both cutting blades, and FIG. 5 is an explanatory view showing a modified example. 2 ... Fixed body 5 ... Movable body 7, 8 ... Clamping body 12, 13 ... Cutting blade 15 ... Interlocking mechanism

Claims (1)

[Scope of utility model registration request] 1. A pair of clamp bodies are provided between a fixed body and a movable body which is arranged so as to be able to move forward and backward with respect to the fixed body. In addition, a pair of cutting blades that cuts the gate portion are disposed so as to face the gate portion so that they can come into contact with and separate from each other, and one of these cutting blades is provided integrally with the movable body, and the other is provided. The cutting blade is provided to the fixed body so as to be movable back and forth, and further, between the other cutting blade and the movable body, the other cutting blade is moved forward and backward in association with the forward and backward movement of the movable body, A cutting device for a casting gate, which is provided with an interlocking mechanism for cutting the gate part by bringing both cutting blades into contact with each other when cutting.