JPH07204960A - Structure for fixing workpiece having weak strength - Google Patents

Abstract

PURPOSE:To provide a structure for fixing firmly fixing a workpiece having a weak strength so as to cut one side surfaces thereof, which allow the workpiece to be easily separated from a base plate as necessary. CONSTITUTION:In a structure for fixing a workpiece 12 having a weak strength, which allows the workpiece to be easily separated from a base plate 15 made of materials having a high strength, and formed therein with a plurality of through-holes 16 which are suitably-distributed, and the workpiece 12 is formed therein with recesses 18 at positions corresponding to the through-holes 16. Bolts 17 which are inserted into the through-holes 16 so as to fasten the workpiece 12 to the base plate 15 are inserted in the recesses 18 so that the workpiece 12 and the bolts 17 are coupled together with the use of resin 19 filled in the recesses 18. When the bolts are unfastened, the workpiece 12 can be separated from the base plate 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a structure for fixing a weak work made of a weak material such as urethane resin to a base plate made of a strong material such as iron and hard resin.

[0002]

2. Description of the Related Art When cutting a weak-strength work with a cutting machine such as an NC processing machine to produce a design model or prototype,
Since it is necessary to securely fix the work to the cutting machine,
The work is fixed by the fixing structure shown in (A) to (C). In the fixing structure shown in FIG. 1A, the work 2 is fixed to the cutting machine 1 by a plurality of clamps 3. Same figure (B)
The fixing structure of No. 2 fixes the work 2 to the cutting machine 1 with the free vices 4 and 4. The fixing structure of FIG. 1C is to fix the work 2 to the base plate 5 fixed to the cutting machine 1 with the free vices 4 and 4 with the double-sided adhesive tape 6 having a strong adhesive force.

[0003]

In the fixing structure shown in FIG. 3A, the work 2 cannot be firmly fixed and cannot be cut because the portion of the work 2 where the clamp 3 abuts is easily deformed. . In the fixing structure shown in FIG. 3B, the side surface of the work 2 on which the free vices 4 and 4 are in contact is not cut. Since the double-sided adhesive tape 6 has a strong adhesive force in the fixing structure shown in FIG. 2C, when the work 2 is separated from the base plate 5,
The weak-strength work 2 may be damaged such as cracks.

[0004]

In order to solve the above-mentioned problems, the present invention can firmly fix a work to a base plate so that a weak-strength work can be laterally cut, and the work can be easily removed from the base plate as needed. An object is to provide a fixing structure for a weak-strength work that can be separated into two parts.

The means adopted by the present invention is a weak-strength work fixing structure for fixing a work made of a material having low strength to a base plate made of a material having high strength. In the base plate, a plurality of insertion holes are appropriately distributed. The work is provided with an embedding recess at a portion corresponding to each insertion hole, and a bolt that is inserted through each insertion hole and is locked to the base plate is inserted into the embedding recess to fill the embedding recess. The fixing structure for a weak-strength work is characterized in that the work and the bolt are connected by the resin. In some cases, the base plate and the work can be separated by unscrewing the bolt.

[0006]

[Operation] Plural bolts locked to the base plate
Since the work is connected to the work through the resin filled in the embedded recess, the work having a weak strength is firmly fixed to the base plate. Since the base plate and the work can be separated by unscrewing the bolt, it becomes possible to separate the work of low strength without applying an excessive force to the work.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A fixing structure for a weak-strength workpiece according to the present invention (hereinafter referred to as "the fixing structure of the present invention") will be described below with reference to an embodiment shown in the drawings. 2 is a sectional view showing a work procedure for obtaining the fixing structure of the present invention.The improvement of this embodiment is that the base plate 15 is provided with two or more weak-strength works 12 as shown in FIG. That is, the bolts 17 are firmly connected.

The base plate 15 is formed of a material having high strength such as iron or hard resin. The base plate 15 is provided with two or more insertion holes 16 in an appropriately distributed state in a region connecting the works 12. Each insertion hole 1
6 is a small diameter portion 16a and a large diameter portion 16b, and a head portion 1 of a bolt 17 described later on a step portion 16c formed at the boundary portion.
7a is provided so as to be locked.

The work 12 is formed from a material having a low strength such as urethane resin into an appropriate shape such as a cube or a cylinder.
An embedding recess 18 is provided in a portion of the bottom surface 12a facing the base plate 15 corresponding to each of the insertion holes 16. The work 12 has bolts 1 that are inserted into the insertion holes 16 of the base plate 15 and are locked to the base plate 15.
The screw portion 17b of No. 7 is inserted into each embedding recess 18, and is firmly connected to the bolt 17 by the resin 19 filled in the embedding recess 18 and cured.

The bolt 17 is previously coated with a release agent such as silicone oil so as not to adhere to the resin 19. Further, the bolt 17 may be connected at its tip end with a filler 20 for tightening, which is made of an easily deformable material such as polystyrene foam. The tightening filler 20 is designed so that the tip of the bolt 17 bites as the bolt 17 is tightened.
The depth of the embedded recess 18 and the screw portion 17b of the bolt 17
The length of the, depending on various conditions such as the cutting shape of the work 12,
It is selected appropriately.

Next, the procedure for connecting the work 12 to the base plate 15 will be described with reference to the embodiment shown in FIG. First, as shown in FIG.
The required number of insertion holes 16 are formed in the plate 5 and prepared. Next, the work 12 is placed upside down, and the base plate 15 is placed on the bottom surface 12a of the work 12 facing upward. Then, as shown in FIG.
A plurality of embedded recesses 18 are bored in the bottom surface 12a of the work 12 by a hand drill or the like to an appropriate depth so as to be aligned with the respective insertion holes 16 of No. 5.

Subsequently, each embedded recess 18 is filled with a resin 19 made of an epoxy adhesive or the like, and as shown in FIG. 2C, each insertion hole of the base plate 15 is set before the resin 19 is cured. The threaded portion 17b of the bolt 17 inserted in 16 is embedded in the embedding recessed portion 18 of the work 12, and the fluidized resin 19 is brought into contact with the thread and the thread valley of the threaded portion 17b of the bolt 17. Resin 1 to be filled in each embedded recess 18
The amount of 9 is set so that the resin 19 does not overflow from the embedded recess 18 when the bolt 17 is embedded when the base plate 15 and the work 12 are planned to be separated. In addition,
To prevent the bolt 17 from being adhered to the resin 19, a mold release agent is applied in advance before embedding, and a tightening filler 20 is connected to the tip of the mold release agent as needed.

Finally, when the work 12 is firmly connected to the base plate 15 as the resin 19 hardens, the bolts 17 are tightened as necessary, and then, as shown in FIG.
The base plate 15 is fixed to the cutting machine 1 with free vices 4 and 4 as shown in FIG.

When the base plate 15 and the work 12 are planned to be separated from each other, as shown in FIG. 3, the dust piece 2 is interposed between the cutting machine 1 and the base plate 15.
It suffices to interpose 1, 21 to form a space S for bolt removal below the base plate 15, and fix the base plate 15 with clamps 3, 3. The work 12 separated from the base plate 15 by unscrewing the bolt 17 can be accurately re-fixed to the predetermined position of the base plate 15 by screwing the bolt 17 when reconnecting to the base plate 15 for re-cutting or the like.

[0015]

As described in detail above, the fixing structure of the present invention has the following excellent effects. Since the work of weak strength can be firmly fixed to the base plate, the cutting speed can be increased, and the cutting depth per cutting can be increased, so that the cutting time can be shortened. Since the weak-strength work can be firmly fixed to the base plate, the entire surface of the weak-strength work can be cut.

Since the bolt can be unscrewed without applying an excessive force to the weak-strength work, the work can be separated from the base plate without damaging the work. When the work separated from the base plate is reconnected to the base plate, the work can be fixed again at a predetermined position of the base plate without displacement.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a fixing structure of the present invention.

2 (A) to (C) are cross-sectional views showing a work procedure for obtaining the fixing structure of the present invention.

FIG. 3 is a cross-sectional view showing another mode of mounting the base plate.

FIG. 4A to FIG. 4C are front views showing a conventional work fixing structure.

[Explanation of symbols]

 12 ... Work 15 ... Base plate 16 ... Insertion hole 17 ... Bolt 18 ... Embedded recess 19 ... Resin

Claims (2)

[Claims] 1. A weak-strength work fixing structure for fixing a work made of a material having a low strength to a base plate made of a material having a high strength, wherein the base plate has a plurality of insertion holes formed in an appropriately distributed state. Has a recessed recess at a position corresponding to each insertion hole, and a bolt that is inserted through each insertion hole and locked to the base plate is inserted into the recessed recess, and the work and the bolt are filled with the resin filled in the recessed recess. Fixed structure for weak-strength workpieces, characterized in that and are connected. 2. The fixing structure for a weak-strength work according to claim 1, wherein the base plate and the work can be separated by screwing out the bolt.