JP2001162474A - Fixing device for machining - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing device for machining causing no dimension error in fixing positions of works even when simultaneously installing the plural works each having a dimension error or plural kinds of the works. SOLUTION: This fixing device for machining for fixing the plural works is provided with a simultaneously fixing means aligning and simultaneously fixing plural fixtures for respectively fixing the works. When fixing the plural kinds of the works, the fixing device is installed with common fixture guides to change and install the fixtures for the plural kinds of the works.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing method for simultaneously fixing a plurality of objects to be machined (hereinafter referred to as "workpieces") at the time of performing machining such as cutting and polishing (abrasive machining). Especially in horizontal machining centers,
The present invention relates to a fixing method suitable for fixing a plurality of workpieces having a dimensional error in a manufacturing method and a plurality of different kinds of workpieces having the same shape as well as a plurality of different kinds of workpieces at the same time.

[0002]

2. Description of the Related Art Some workpieces cause dimensional errors (variations) in the manufacturing process. For example, in the case of a cast article, as typical casting defects, there is a discrepancy (gap) due to displacement of the upper and lower molds, a casting defect in which the mold is pushed up by the molten metal pressure after pouring, and the size becomes large. Due to these deficiencies, for example, 0.
When a plurality of workpieces are fixed at the same time when machining is performed with a dimension error of about 5 mm to 1.0 mm, errors of each dimension are stacked, resulting in a large dimensional error in the fixing position of the workpiece. , Processing accuracy is not stable.
As described above, there is a problem in simultaneously fixing a plurality of workpieces and performing machining using the fixing.

[0003] For this reason, as a method for fixing a plurality of works, for example, in the case of a horizontal machining center, a versatile jig as shown in FIG. The mainstream approach has been to set the products one by one on a fixed stand dedicated to the product and to directly hold down and fix the work itself using a clamp or vise.

[0004]

However, as in the above-described example of the cast article, since each work is machined with a dimensional error due to, for example, a defect, a plurality of works are required. If they are fixed at the same time, dimensional errors are stacked one by one, resulting in a large dimensional error in the fixed position of the work, which becomes a bottleneck in continuous machining. Further, in the conventional method of setting a work piece one by one on a fixed stand dedicated to a product arranged at a fixed position and using a clamp or a vice or the like to directly press and fix the work piece itself, a continuous method is used. This was very inconvenient for machining. Further, in the case of different types of workpieces having different shapes, the conventional method has a problem that a table or a scale having a fixing device for machining separately mounted on the workpiece must be replaced.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problem. An object of the present invention is to fix a plurality of works having dimensional errors at the same time, causing a large dimensional error in the fixing position of the works. It is an object of the present invention to provide a fixing device for machining that does not allow the fixing of different types of workpieces.

[0006]

According to the first and second aspects of the present invention, in order to achieve the above object, the fixtures for holding the individual workpieces in contact with each other are stacked in layers, and for example, a hydraulic device is used from the top of the fixtures. So that it can be pressed down and fixed.
By aligning and superposing the opposite surfaces of the work holding surface, stable fixing can be obtained even with a plurality of pieces, and it is possible to fix all of the plurality of pieces at the same time.

According to a third aspect of the present invention, when a plurality of workpieces having dimensional errors are fixed, a positioning stopper pin is sealed between the reference positions of the fixtures as an error absorbing means so that a fixed distance can be maintained. Therefore, by determining the position of each reference fixture, it is possible to fix a plurality of works having dimensional errors.

According to the fourth and fifth aspects, when a plurality of workpieces having dimensional errors are fixed, pressure can be applied also between the workpiece holding surfaces and the opposite surfaces of the fixtures stacked in layers as error absorbing means. An elastic body is sealed in the space, and during this time, a plurality of works having dimensional errors can be fixed using the elastic force.

According to a sixth aspect of the present invention, when a plurality of types of workpieces having different shapes are fixed, a common guide for attaching the plurality of types of workpiece fixing tools is provided on the fixing device body, and the fixing tools are divided there. It is possible to fix a plurality of types of workpieces by exchanging fixtures suitable for each work and connecting the fixture and the fixture guide with bolts.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to make the contents of the present invention easier to understand, the present invention will be described in detail with reference to the following embodiments.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS More specifically, a plurality of faucet fitting main products having a dimensional error, for example, are set in a fixing device as shown in FIG. The fixtures for holding the work are a reference fixture 5 and an upper fixture 4 having surfaces conforming to the shape of the work. In a state where the fixtures are layered, a plurality of the fixtures are simultaneously fixed by pressing from the top at a stretch. I do. The opening and closing operation of the fixing device is enabled by moving the slide bar 11 up and down, and the pressing of the fixing device is enabled by applying pressure. Furthermore, this fixing device is installed on the table of a horizontal machining center,
These products are continuously machined. Since the horizontal machining center has a rotary function in which the table moves in the rotation direction, processing in the front and side directions with the work attached is possible.

Further, in order to absorb a dimensional error generated when a plurality of works having a dimensional error are fixed, a positioning stopper pin 7 shown in FIG. 1 is sealed between the fixtures stacked in layers. Because the positioning stopper pins 7 cause the lower reference fixtures to be at fixed positions, the center of the work is determined using this position as a reference in the Y direction and is stored in the coordinate system of the machine. In the X and Z directions, the center of the work is determined based on the LM guide 10 and stored in the coordinate system of the machine. Further, the flat spring 8 of FIG. 1 is sealed on the upper fixing side between the fixtures stacked in layers, and during this time, the work is fixed by utilizing this spring force.

When a different type of work is fixed and processed, the fixing tool is removed from the fixing tool guide 9 in FIG. 1, replaced with a fixing tool having a surface corresponding to the shape of the work, and fixed again. Attach to the tool guide 9. At this time, the connecting surfaces of all the fixing devices and the fixing device guides have cross-shaped key grooves as shown in the side view of the fixing device in FIG. It is inserted into a convex shape, and the fixture and the fixture guide are fitted to each other to give reproducibility.

[0014]

According to the present invention, the following effects are exhibited by the above configuration. According to claim 1, since it is possible to machine a plurality of workpieces having dimensional errors continuously, it is necessary to replace one workpiece at a time. Can be achieved.

According to the second aspect, since a plurality of works having dimensional errors can be fixed at the same time, the efficiency of the setup work can be improved.

According to the third aspect, even if a plurality of works having dimensional errors are fixed, the positional relation of the works is fixed, so that the errors can be absorbed and the workability is improved.

According to the fourth and fifth aspects, the work can be fixed securely and easily, so that the efficiency of the setup work can be improved.

According to the sixth aspect, by fixing a plurality of types of workpieces, flexible production can be performed.
Machine stoppage time is greatly reduced, and work efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic view of an apparatus showing an embodiment of the present invention.

FIG. 2 is a partial side view of components of the embodiment.

FIG. 3 is a three-dimensional view showing a configuration of a conventional example.

[Explanation of symbols]

1 ... Fixing support column, 2 ... Fixing receiving sub-table,
3 Work 1, 4 Upper fixture, 5 Reference fixture, 6 Hydraulic equipment, 7 Positioning stopper pin, 8 Flat spring,
9: Fixture guide, 10: LM guide, 11: Slide bar, 12: Work 2, 13: Work 3, 14 ... General-purpose jig (scale), 15: Clamp

Claims (6)

[Claims] 1. A fixing device for machining comprising a plurality of objects to be processed, wherein a plurality of fixing members for fixing the respective objects are provided, and a simultaneous fixing means for fixing the fixing members simultaneously is provided. A fixing device for machining. 2. The fixing device for machining according to claim 1, wherein the fixing tools are aligned and fixed in at least one line, and a pressing force in the alignment direction is used as the simultaneous fixing means. Fixing device for machining. 3. The fixing device for machining according to claim 1, wherein said fixing device for machining includes an interval holding means for holding said fixtures at a predetermined interval. 4. The fixing device for machining according to claim 1, wherein the fixing device for machining uses a pressing force to fix the object to be processed with the fixing tool. 5. The fixing device for machining according to claim 4, wherein the fixing device for machining uses an elastic body for fixing the object to be processed by the fixing tool by pressing force. 6. A fixing device for machining which fixes a processing object having a different shape, wherein a plurality of fixing tools for fixing the respective processing objects are provided, and the fixing tools are simultaneously fixed by simultaneous fixing means. A fixing device for machining, wherein a fixing portion of the fixing tool to the fixing device is shared.