JPH0522368Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a device for separating surplus parts of castings.

(Prior Art) Some castings have surplus parts such as runners and risers at both ends of a long product part such as a camshaft. In such a casting, both surplus parts are separated from the product part by a surplus part separation device. Therefore, in the surplus part separation device, the product part of the casting is supported (held) by a support member. ), and a pressing force is simultaneously applied to both surplus parts by a pair of pressure members, so that both surplus parts are simultaneously folded from the product part.

Incidentally, recently, the above-mentioned castings have been improved to have harder materials, and there is a tendency for the castings to be cast to have a large number of product parts and surplus parts corresponding to each product part. . For this reason, the pressure applied by the pressure member in the surplus part separation device is insufficient to break the surplus part of the casting, and the surplus part separation device is not suitable for breaking the surplus part of the casting. It is becoming unusable. As a result, it becomes necessary to newly prepare a large-sized surplus part separation device capable of outputting a large pressing force to the casting.

On the other hand, from the viewpoint of preventing the surplus part separation device from becoming large, it is considered that the surplus part of the casting as described above can be broken off using a pressing force comparable to that of conventional general-purpose equipment (for example, 100 tons). There is. One method is to use the inclined surface of the cam member as shown in Japanese Utility Model Application Publication No. 61-72360, and when pressurizing, bending force is applied to both surplus portions by the inclined surface to fold the surplus portions. It is conceivable that this would reduce the necessary pressurizing force.

(Problems to be Solved by the Invention) However, in the surplus part separation device, both surplus parts of the casting are basically broken at the same time, and even if the cam member is used as described above,
The necessary reduction in the pressing force is so slight that the pressing force of the surplus part separation device may not be enough to cover both surplus parts from the product part.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to sufficiently reduce the pressing force required to fold both excess parts at both ends of the product part of a casting, and to create a pressurizing force comparable to that of a general-purpose device. It is an object of the present invention to provide a surplus part separating device which can significantly expand the application range of castings in which both surplus parts are folded.

(Means and actions for solving the problem) In order to achieve this purpose, the present invention includes a support member that supports a casting having surplus parts at both ends of a long product part, and a support member that applies pressure force. a pressing member for folding both of the surplus parts from the product part, the support member having an inclined surface that supports the one surplus part and a pressing member that folds the other surplus part from the product part; and a holding member that holds the product part in a fitted state, and the pressure member is configured to press the product part downward on the one surplus part side.

With the above configuration, when pressurizing force is applied to the product part, bending force is first applied to one surplus part by the inclined surface, and the interaction between the bending force and the original shear force causes the surplus part to bend. Only the parts will break easily. After this, when further pressure is applied to the product part, the casting becomes inclined, so the other surplus part is held by the holding member, and in this state, the product part is applied on the one surplus part side. Since pressure is applied, it is possible to effectively utilize moment (moment length) to fold only the other surplus portion. In this way, instead of folding both surplus parts at the same time, you can fold them back and forth in time,
Each surplus part will be folded separately, and since the bending force and moment of the slope will be used to fold each surplus part, the pressure required to fold both surplus parts will be sufficient. It will be reduced to For this reason, the range of application of castings that can break both surplus portions with a pressing force comparable to that of a general-purpose device will be significantly expanded.

In addition, it is sufficient to apply pressure only to one surplus portion of the product portion, and the number of parts of the pressure member can be reduced compared to the past, and the configuration can be simplified.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In FIGS. 1 to 4, reference numeral 1 denotes a surplus separation device according to the present invention, and the surplus separation device 1 is roughly composed of a lower mold 2 and an upper mold 3 as supporting members, and the upper mold 3 is It is possible to approach and separate from the lower mold 2.

The lower mold 2 is formed according to the type of casting 4 having surplus parts at both ends of a long product part, and the casting 4 can be set in the lower mold 2. In this embodiment, as shown in FIG. 2, the casting 4 is provided with four camshaft parts 5 arranged in parallel as product parts, and one end of each camshaft part 5 is pressed as one surplus part. Hot water 6 is attached to each, and the other ends of each camshaft portion 5 are connected by a runner 7 as the other surplus portion. A runner 8 is connected to the runner 7, and the runner 8 extends toward the riser 6 side through the center of the camshaft portion 5 in the arrangement direction. The setting of this casting 4 will be described later.

A pair of substantially rectangular holes 9 are formed in the lower mold 2 and penetrate in the vertical direction, and each hole 9 is arranged in parallel in the width direction of the lower mold 2 (in the vertical direction in FIG. 2). A support stand 10 is disposed between the pair of holes 9. Each hole 9 has a length sufficient to allow two camshaft portions 5 to be arranged side by side in the width direction of the lower mold 2, as shown in FIG. ), the length is approximately the same as the axial length of the camshaft portion 5.

A plurality of wedge-shaped cam members 11 are provided on the upper surface of the lower mold 2 so as to protrude upward at one end (on the right side in FIG. 1) of the lower mold 2 in the longitudinal direction. The plurality of cam members 11 are arranged in parallel in the width direction of the lower mold 2, and each of the cam members 11
The position of the lower mold 2 in the longitudinal direction is determined according to the shape of the lower mold 2. Each cam member 11 has a first
As shown in FIG. 2, each cam member 11 is provided at the opening edge of the hole 9, and a flat upright surface 12 is formed on each cam member 11 so as to be continuous with the inner surface of the hole 9. On the other hand, each cam member 11 has the upright surface 12
On the longitudinally outward side of the lower mold 2, the inclined surface 1
3 is formed, and this inclined surface 13 slopes downward to the right as shown in FIG.

The upper surface of the lower mold 2 has a cross section approximately L at the other end (left side in FIG. 1) in the longitudinal direction of the lower mold 2.
A letter-shaped holding member is provided. Holding member 14
extends in the width direction of the lower mold 2, as shown in FIG.
As shown in the figure, they cooperate to form a holding groove 15. This holding groove 15 is sized so that the runner 7 of the casting 4 can be loosely fitted thereinto with a certain gap, and the details of this gap will be described later.

As shown in FIG. 1, the upper mold 3 has a pressure punch 16 as a pressure member and a runner dividing blade 17. The pressure punch 16 is disposed above the hole 9 on one end side in the longitudinal direction of the lower mold 2,
It extends further downward than the runner splitting blade 17, and when the casting 4 is set in the lower die 2, the pressurizing punch 16 moves each camshaft portion 5 from above to below as the upper die 3 descends. It has the function of pressurizing towards. The runner dividing blade 17 is arranged above the support stand 10, and when the casting 4 is set in the lower mold 2, the runner dividing blade 17 is arranged as the upper mold 3 descends. It has the function of cutting the runner 7.

In FIGS. 1 and 2, 18 is a positioning pin (only one is shown in FIG. 1), and 19 is a positioning hole for the positioning pin. Also, although not shown,
An unloading belt conveyor is disposed below the hole 9 of the lower mold 2.

In such a surplus part separation device 1, first, a casting 4 having a surplus part is set on the lower mold 2. In this case, as shown in FIG. , the runner 7 is loosely fitted into the holding groove 15, and the runner 8 is positioned on the support base 10.

Next, the upper mold 3 is processed, and the pressure punch 16 is pressed against one end side of each camshaft portion 5 (on the right side in FIG. 1).
Pressure is applied from above to below. This results in
A bending force acts on each riser 6 in a direction that expands the distance between each camshaft part 5 and each riser 6, and due to the bending force and the original shearing force, each riser 6
As shown in FIG. 3, it can be easily broken off from the camshaft portion 5. In addition, in FIG. 3, the arrow indicates the pressing force.

At this time, the runner 7 is not held by the holding member 14 due to a certain gap between the runner 7 and the holding groove 15, and when each riser 6 is folded, the pressure punch 16 The pressing force is used only to break each riser 6 and does not act on the runner 7.

Even after each riser 6 is broken, the pressure punch 1
6 applies a pressing force to one end side of the camshaft portion 5. As a result, each camshaft portion 5
The broken part is guided by the inner edge of the hole 9 opening and descends, and as a result, the runner 7 moves toward the holding member 15 as shown in FIG. It is held in contact with the inner surface of the member 14. After this, in this state, a pressurizing force is further applied to one end side of each camshaft part 5, and a bending force is applied between the runner 7 and each camshaft part 5, and the runner 7 is It will be folded from 5 onwards. In this case, each camshaft portion 5
Since the pressing force is applied to one end side, the moment can be used effectively, and a relatively small pressing force is sufficient. In addition, in FIG. 4, the arrow indicates the pressing force.

When the runner 7 is broken, each camshaft section 5 falls through the hole 9 onto a belt conveyor (not shown), and each camshaft section 5 as a product section is carried out from the surplus separation device 1. become. Also, around this time, the runner dividing blade 17 descends to cut the runner 8.

In this way, the riser 6 and the runner 7 are folded separately in that order, and the wedge action of the cam member 11 is effectively used in the case of the riser 6, and the moment is effectively used in the case of the runner 7. As a result, the pressure required to fold the riser 6 and the runner 7 can be significantly reduced compared to the case where both 6 and 7 are folded at the same time.

Although the embodiments have been described above, in the present invention, the inclined surface 13 may be formed so as to descend to the left from the top to the bottom in FIG.

(Effects of the invention) As described above, the present invention sufficiently reduces the pressing force required to fold both surplus parts at both ends of the product part of a casting, and folds both surplus parts with a pressing force comparable to that of a general-purpose device. It is possible to provide a surplus part separation device that can significantly expand the applicable range of folding castings.

In addition, since the number of parts for the pressure member can be reduced,
The configuration of this device can be simplified.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing a surplus separation device according to an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, and FIGS. 3 and 4 are operation state diagrams of FIG. 1. . DESCRIPTION OF SYMBOLS 1... Surplus part separation device, 2... Lower mold, 5... Camshaft part, 6... Riser, 7... Runway, 13...
... Inclined surface, 14 ... Holding member, 16 ... Pressure punch.

Claims (1)

[Claims for Utility Model Registration] A support member that supports a casting having surplus parts at both ends of a long product part, and a pressure member that applies pressure to fold the surplus parts from the product part. In the casting surplus part separating device, the support member has an inclined surface that supports the one surplus part, and a holding member that holds the other surplus part in a loosely fitted state, and the pressure member The casting surplus part separating device is configured to pressurize the product part downward on the one surplus part side.