JPH071105A - Cast parts and its machining method - Google Patents

Abstract

PURPOSE:To improve the efficiency and the precision of machining by integrally cast an embedding metal at the time of casting to produce a cast parts. CONSTITUTION:The cast part 1 is integrally cast with the embedding metal 3 In this embedding metal 3, screw holes 5 for fixing a fitting tool used at the time of machining so as to be freely fit/detahed. A cover member 7 for preventing the damage of the screw holes with molten metal and sand at the time of casting-in the embedding metal 3, is covered with fitting screws 9. The embedding metal 3 is cast in the state attaching the cover member 7. Then, at the time of machining the cast parts 1, the cover member 7 is taken out, and a cylindrical fitting tool 13 is fit with screws to the embedding metal 3, and this cylindrical fitting tool 13 is held with a power chuck 19 of a rotary table 17 on a machine table 15 and machined with a tool 23. After machining, the cast holding part is cut off. By this method, the set-up time for machining can be shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting part which is machined after casting and a machining method for the casting part.

[0002]

2. Description of the Related Art Conventionally, when casting a cast component to be machined after casting, the workpiece is fixed on the basis of the casting surface, or a boss for machining is provided in advance. After machined, the machined surface is replaced and the other surface is machined.

Further, when casting is performed without providing a boss, a machining method is employed in which after machining one surface, the surface is used as a reference for replacement and the other surface is machined.

[0004]

In the conventional machining method as described above, it is necessary to first machine the reference surface and then replace the work piece, which is a hindrance to automation of machining. Was becoming. However, if the work is mounted and processed according to the casting surface standard without processing the reference surface, the mounting accuracy cannot be improved and the work shapes are diverse, making it difficult to standardize the work mounting method. There's a problem.

An object of the present invention is to provide a cast part which can be standardized in mounting method for any shape work, can be automated, and has high mounting accuracy, and a machining method thereof.

[0006]

SUMMARY OF THE INVENTION According to the present invention, an embedded metal fitting or a member to be gripped is integrally cast to manufacture (hereinafter referred to as cast-in-girth casting), and a fixture is fixed to the embedded metal fitting to grip it. The above problem is solved by machining as a member or by mounting a cast graspable member on a machine tool and performing machining, which is configured as follows.

(1) A casting part manufactured by integrally casting an embedding metal fitting for fixing a fixture used during machining of the casting part at a desired position when the casting part is cast. (2) A cast part manufactured by integrally casting a gripped member for gripping and processing at a desired position of the cast part during machining of the cast part during casting of the cast part. (3) When the casting part is cast, at the desired position of the casting part, an embedded metal fitting for fixing a fixture used during machining of the casting part is integrally cast into the embedded metal part of the casting part. A method of machining a cast part, wherein the fixture is fixed, and the fixture is attached to a machine tool for machining. (4) A casting part manufactured by integrally casting a gripped member for gripping and processing during machining of the casting part at a desired position of the casting part during casting of the casting part. A method of machining a casting part, wherein the grasping member is grasped by a machine tool to perform machining, and then the grasped member is cut off.

[0008]

According to the present invention, since the embedded metal fitting having the reference surface is cast integrally with the work, a predetermined standardized mounting tool can be detachably attached to the reference surface of the embedded metal fitting with a screw or the like. When mounted on the machine tool, the cast parts can be handled as if they were machined on one side, and parts of any shape can be mounted on the machine tool by the same mounting method. Note that the attachment may be removed after machining.

Further, the grasped member may be cast in a cast-in-circle manner, machined using the grasped member as a reference, and then the grasped member may be cut off.

[0010]

FIG. 1 shows an embodiment according to the present invention.
2 is a cross-sectional view of an embodiment in which an embedded metal fitting is cast into a casting part, FIG.
3 is an explanatory view showing a case where a member to be grasped is attached to the casting part shown in FIG. 1, and this is grasped by a chuck for machining.
Is a side sectional view showing a case where a casting part is mounted on a mounting base by using a mounting metal fitting, FIG. 4 is a side sectional view showing a case where a taper shank is used as a mounting tool, and FIG. 5 is a part to be gripped by various casting parts. FIG. 6 is an explanatory view showing an embodiment in which a shank having a standardized shape is cast as a member, and FIG. 6 is an explanatory view showing an embodiment in which a gripped member cast in a cast part is cut off after machining.

In FIG. 1, reference numeral 1 is a cast part, in which an embedded metal fitting 3 is cast. The embedding metal fitting 3 is provided with a screw hole 5 for removably fixing a fixture used for machining, but the screw hole is damaged by hot water or sand during the cast-in casting of the embedding metal fitting. The lid member 7 for preventing the movement is covered with a mounting screw 9. For this purpose, the embedded fitting 3 is cast with the lid member 7 attached.

When machining the cast part 1 cast in this way, the lid member 7 is removed and the cylindrical fitting having the mounting flange 11 at one end as shown in FIG. 13 is screwed, and this cylindrical fixture (member to be grasped) 13 is grasped by the power chuck 19 of the rotary table 17 on the machine table 15, and processed by the tool 23 attached to the spindle 21.

When the embedded metal fitting is to be cast into a cast part, it is preferable that the rotating shaft of the fitting to be attached passes through the center of gravity of the cast part.

FIG. 3 shows a case where the casting part 1 is screwed and fixed to a mount (work head or the like) 27 via a fixture 25, and FIG. 4 shows a case where a taper shank 29 is used as the fixture. ing.

5 (a), (b), (c), (d),
(E), (f), (g), and (h) are front views showing an example in which a shank 31 having a standardized shape is attached to a cast component (workpiece) 1 having a different shape by casting. Each is shown as a side view, and by doing so, the standardization of the clamp portion is achieved, so that machining can be efficiently performed.

The gripped member (shank) 31 to be cast into a cast part is formed by lathe-finishing the shank portion in advance and is integrally cast by casting. In these cases, the unnecessary shank portion is cut and removed after the processing is completed.

For example, as shown in FIG. 6 (a), notch processing 35 is applied to the base of the gripped member 33 that is cast and cast in advance so that the gripped portion of the gripped member 33 becomes unnecessary after processing. Apply a hammering or other impact to the raised part (b)
Make a break as shown in. The gripped member 33 of FIG. 6 has a two-sided width for convenience of automatic conveyance,
In addition, an example of a stepped shape is shown.

While each of the embodiments has been described above, it is necessary to accurately make the round hole casting in the position and the posture of the embedded metal fitting or the member to be gripped during the casting operation. In addition, it is preferable to use a portion having sufficient strength and a thick wall around the periphery.

Further, when the embedded metal fitting is cast-in-casing, the reference surface is protected by a lid member so as not to be damaged, and is removed after shot peening. Not only does this lid member prevent damage to the reference surface, but it is also a mounting bracket (cast part) when the mounting bracket is cast into a casting part.
It also has the role of holding in the pouring sand.

The attachment of the work can be automated by using a table equipped with an automatic chuck and using a work handling device such as a work magazine or a robot. Further, if a table that can be indexed, such as a rotary work head, is used for the table, multi-face machining can be performed with one setup, and efficiency can be improved.

[0021]

EFFECTS OF THE INVENTION According to the present invention, a casting part and a machined part thereof which improve the efficiency and accuracy of the machined work by simply casting the embedded metal fitting or the grasped member used for the machining on the workpiece. A method can be provided.

Further, since the mounting portion for mounting on the processing machine can be standardized, the mounting method at the time of machining does not depend on the work shape, which facilitates highly accurate setup and shortens the setup time. Not only can it be achieved, but the machining can be automated, and unmanned continuous machining can be performed using the machining system.

It should be noted that, after the processing is finished, it is advisable to use a notch portion so that the fixture and the member to be grasped which are no longer needed can be detached or easily cut off, and the breaking by hammering can be utilized. If necessary, remove and break parts should be plugged appropriately, painted after putty, or finished with a grinder to make them inconspicuous.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an embodiment in which an embedded fitting is cast in a cast part.

FIG. 2 is an explanatory diagram showing a case where a member to be gripped is attached to the casting part shown in FIG. 1, and this is gripped by a chuck and machined.

FIG. 3 is a side sectional view showing a case where a casting part is mounted on a mounting base by using an embedded metal fitting.

FIG. 4 is a side sectional view showing a case where a tapered shank is used as a mounting tool.

FIG. 5 is an explanatory diagram showing an embodiment in which a shank having a standardized shape is cast as a member to be held into various cast parts.

FIG. 6 is an explanatory view showing a case where a gripped member cast into a cast part is cut off after machining.

[Explanation of symbols]

 1 Cast parts 3 Mounting bracket 5 Screw hole 7 Lid member 9 Screw 13 Cylindrical mounting tool 19 Power chuck 21 Spindle 25 Mounting tool 27 Mounting base 29 Taper shank 31 Standard shape shank 33 Grasped member 35 Notch processing part

Claims (4)

[Claims] 1. A casting part produced by integrally casting an embedded metal fitting for fixing a fixture used during machining of the casting part at a desired position of the casting part when the casting part is cast. 2. A cast part manufactured by integrally casting a gripped member for gripping and processing at a desired position of the cast part at the time of casting the cast part, when machining the cast part. 3. The embedding of a casting part produced by integrally casting an embedding metal fitting for fixing a fixture used during machining of the casting part at a desired position of the casting part when the casting part is cast. A method for machining a cast part, wherein the fixture is fixed to a metal fitting, and the fixture is attached to a machine tool for machining. 4. A cast part produced by integrally casting a gripped member for gripping and processing at a desired position of the cast part during casting of the cast part, when casting the cast part, A method for machining a cast part, characterized in that the grasped member is grasped by a machine tool for machining, and then the grasped member is cut off.