JPS61288940A - Formation of oblique hole - Google Patents

Abstract

PURPOSE:To enable an efficient machining fabrication and to aim it preventing a cutter tool, etc. from being broken, by providing such an arrangement that an aluminum alloy plate having a low cutting resistance but a strength capable of guiding a cutter tool, is bonded to a planar plate during heat-treatment so that an oblique hole and an accompanying hole are formed being guided by the aluminum alloy plate, and the aluminum alloy plate is then removed after heat-treatment. CONSTITUTION:An aluminum alloy patch plate 4 is bonded to a stainless steel planar plate 1 to be fabricated with the use of an adhesive material 4. A milling process is very suitable for fabricating an oblique hole 2, and the therefore, the fabrication is initiated at the surface of the patch plate 4 by means of an end mill 3. Due to the use of aluminum materials for the patch plate 4, the end mill 3 may make the fabrication precisely without any deflection. Accordingly, there may be prevented any shift of the tool caused by a cutting resistance due to the already formed hole in the patch plate 4 which serves as a guide for the tool, and therefore, the oblique hole may be formed with a high degree of accuracy. Then, after completion of the fabrication, the planar plate is subjected to an annealing process in which a heat having a temperature of 400-450 deg.C is applied, and therefore, the adhesive material 5 deteriorates so that the patch plate 4 may be easily removed from the planar plate 1. With this method, it is possible to avoid positional errors, breakage of a cutter tool, etc.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to a separating material such as stainless steel having a large number of diagonal holes, such as an effective wall used in a measuring body of a transsonic wind tunnel. The present invention relates to an improvement in the manufacturing method of the handset.

[Conventional technology]

FIG. 2 is a sectional view showing a conventional method for manufacturing a flat plate with oblique holes, and FIG. 3 is a plan view in the direction of the arrow in FIG. In the figure, (1) is a stainless steel flat plate, and (2) is A with an inclination angle θ.
The oblique hole (3) has a circular diameter cross section of φ, and is a machining tool such as a cutter or an electric discharge machining electrode, which is used depending on each machining method.

Conventionally, when machining a diagonal hole (2) into such a flat plate (11), when the machining tool (3) is a cutter, an end mill or a drill, etc.
Tilt #4 at an angle θ, fix and cut. Similarly, in the case of electric discharge machining, a flat plate (11?) is fixed, but
As is well known, electric discharge machining requires a very long machining time, so the machining tool (3) is generally of a multipolar type in which a plurality of electrodes are combined.

[Problem that the invention seeks to solve]

In the oblique hole (2) machining method where the machining tool (3) as described above is used for cutting with a blade, s! - Since the blade is applied with the plate (1) tilted, there are disadvantages in that the blade tends to escape, it is difficult to sharpen the blade in an accurate position, and the blade is likely to break. In addition, in the case of electric discharge machining, the machining tool (3) is generally arranged with a plurality of electrodes at a predetermined pitch on the working wheel, and a plurality of workers (2) are machined at the same time. In cases where special measures are required to remove clogging from cutting powder, etc., and the slow basic processing speed is a problem, especially in cases where more than a few hundred scientists (2) are required. There was a cost problem.

This invention was made in order to solve these conventional problems.
This is to prevent breakage of the cutlery.

[Means for solving problems]

Does this invention allow the blade to directly hit the slope of difficult-to-cut materials such as stainless steel? : This was done by gluing an aluminum alloy plate to a flat plate in advance, which has little cutting resistance and has enough strength to guide the blade.
This aluminum alloy plate is used as a guide for a cutting tool and is scientifically machined into a flat plate. In addition,
When peeling off the adhesive part, it is carried out during heat treatment to remove distortion during cutting.

[Effect]

In this invention, the aluminum material is first cut with a knife, and the cut part is used as a guide surface to support the knife before machining a flat plate, which is a difficult-to-cut material. It can be prevented. In addition, excessive stress is applied to the aluminum material when cutting from an oblique direction, but this can be overcome by contacting the flat plate with a sufficient area, and peeling of the adhesive part can be easily done during heat treatment as described above. .

〔Example〕

FIG. 1 is a sectional view showing an embodiment of the present invention. In the figure, (1) is a stainless steel flat plate that is the workpiece;
(4) is an aluminum alloy plate, and (5) is an adhesive that fixes these, and is an organic material that deteriorates in strength at temperatures below 400℃. It is. scientist f2
1? : When processing, milling is convenient in this case, and the plate (4) is cut using an end mill (3).
Start processing from. In this case, as shown in the figure, the current board (4
) is an end mill (3) because the material is aluminum alloy.
In order to prevent the cutter from shifting due to the cutting resistance that occurs when cutting the flat plate (1), the part that has already been machined on the plate (4) will be moved by the end mill (3). Scientist (2) can be processed with good reciprocity.

In addition, after hole drilling is completed, annealing is generally performed to remove processing stress, but in this case, the adhesive (5) deteriorates due to the addition of a temperature of 400 to 450°C, causing the flat plate (1) and this material to deteriorate. Board (
4) can be easily separated.

〔Effect of the invention〕

As explained above, this invention solves the conventional problems such as poor positioning of the cutter due to escape, breakage of the cutter, etc. : It is a simple method and is advantageous in terms of cost.

[Brief explanation of drawings]

Figure i1 is a sectional view showing an embodiment of the present invention, Figure 2 is a sectional view showing a conventional method, and Figure 3 is a plan view of Figure 2. In the figure, (1) is a flat plate, and (2) is a scientist. (3) is an end mill which is a processing tool, (4) is a cutting board,
(5) is covered with adhesive. In Figure 1, the same or corresponding parts are designated by the same reference numerals.

Claims (1)

[Claims] In a method of machining multiple diagonal holes in a flat plate with a circular diameter cross section and inclined at a predetermined angle, a plate made of aluminum alloy that covers the surface of the diagonal hole machined in the flat plate is attached to the flat plate as the workpiece. Using an adhesive whose adhesive strength significantly decreases below the annealing temperature used to remove processing residual stress from the flat plates, they are laminated and fixed in the form of laminated plates, and the required number of diagonal holes are cut from this plate using a cutting tool. A method for machining a diagonal hole, characterized by co-machining, and after machining, applying stress relief annealing in a heat treatment furnace while remaining in the form of a laminated plate, and removing the plate.