JPS6331201A - Manufacture of corrugate horn - Google Patents

Abstract

PURPOSE:To manufacture various shape of corrugate horns inexpensively with high accuracy by making a horn cylinder and corrugation separately and assembling the corrugate horn while fitting the both. CONSTITUTION:The horn cylinder is formed by forming slots 3 to a plate 1 with a prescribed interval and forming the result into a conical form. Plates 4 of doughnut shape having a different diameter in following to the shape of the horn cylinder are fitted to the slot 3 and they are connected electrically by soldering or welding and fixed to form corrugation. End flanges 5, 6 are fitted to both ends of the cylinder by welding or the like and a reinforcement member 8 made of a urethane or the like is fitted to the outer circumferential face of the cylinder. Since the plate 1 forming the horn cylinder and the plate 4 forming corrugation are made separately, various shapes are manufactured inexpensively with high accuracy.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to the production of a corrugated horn as a waveguide having a primary radiator and a corrugated gate used in antennas with frequencies in the microwave band or sub-millimeter wave band. Regarding the method.

[Conventional technology]

Conventionally, this type of corrugated horn is machined using a conductive metal block, and each piece is machined in order to provide folds having a predetermined width and height at predetermined intervals on the inner wall surface.
It was manufactured by mechanical cutting using an NC lathe.

Further, as a conventional technique for manufacturing this corrugated horn, there is a technique disclosed in 1% Japanese Patent Publication No. 1983-236504. In this prior art, a thin metal plate is plastically worked to form folds, and a reinforcing material is attached to the folded metal plate.

[Problem that the invention seeks to solve]

By the way, the conventional technique of forming pleats on the metal lump by machining has the problem that it takes a lot of processing time, is not suitable for mass production, and is very expensive.

In addition, in order to eliminate deformation and distortion during the processing process, it was necessary to increase the wall thickness of the corrugated horn, which increased the weight and caused problems in handling during transportation and installation work.

On the other hand, with the conventional technology disclosed in %Kokai No. 60-256504, although the problems of mass productivity, manufacturing cost, and weight are improved, the folds are wrinkled, the folds are distorted, and the precision is poor. There are some points that need to be improved, such as the need for advanced technology to finish the folds and the inner wall in a concentric shape.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing corrugated horns that can be manufactured in various shapes at low cost and with high precision, is lightweight, and has excellent mass productivity.

[Means for solving problems]

The object is to form the horn cylinder body and the folds separately from conductive plates, to form grooves in the plate forming the horn cylinder body into which the plates forming the pleats are fitted, and to insert the pleats into the grooves. The plates forming the horn cylinder and the plates forming the folds are molded into the shape of a corrugated horn, and the plate forming the horn cylinder and the plate forming the folds are fitted together. This is achieved by electrically connecting and fixing.

[Effect]

In the present invention, the horn cylinder body and the pleats are formed separately from conductive plates, and the plate forming the horn cylinder body is formed with a groove into which the plate forming the pleats is fitted, and the pleats are formed in this groove. By fitting and fixing the plates forming the folds, machining using an NC lathe or the like to form the folds can be completely omitted, and the folds can be manufactured at low cost.

In the present invention, the plate forming the horn cylinder is cut.

A groove into which the plate forming the folds is fitted, and a plate forming the folds,
Since each can be precisely processed, high-precision corrugated horns can be manufactured.

Furthermore, according to the present invention, the horn cylinder can be freely made into a conical or pyramidal shape, and the plate forming the pleats can be easily made into a circular or polygonal shape to match this, and the intervals between the grooves into which the pleats are fitted can be freely set. Since it can be formed, corrugated horns of various shapes can be easily manufactured.

Moreover, in the present invention, as described above, the horn cylinder body and the pleats are each formed from a plate, and the plate forming the pleats is fitted into the groove formed in the horn cylinder body and fixed. The entire horn can be made into a shell type, making it lightweight and suitable for mass production.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

Figures 1A, 2B and 3C show an embodiment of the invention for manufacturing a conical corrugated horn.

In the embodiment shown in these figures, the plate 1 forming the horn cylinder and the plate 4 forming the pleats are each made of a conductive material and are individually formed as shown in Figs. 1(A) and CB). are doing.

The plate 1 forming the horn cylinder and the plate 4 forming the folds may be a conductive metal plate or may be a non-conductive synthetic resin plate plated with a conductive material.

, 4.

As shown in FIG. 1(A), the plate 1 forming the horn cylinder is formed into an expanded conical shape, and both ends in the circumferential direction of the plate 1 forming the entire horn cylinder are formed. 1 for
Attach the mating part 2. In addition, grooves 3 are formed in the plate 1 forming the horn cylinder at predetermined intervals in the length direction thereof, into which the plates 4 forming the pleats are fitted. Next, the plate 1 forming the horn cylinder is formed into a conical shape.

The plate 4 forming the folds is formed into a donut shape. Further, each plate 4 forming the pleats is formed in diameter gradually to a size that follows the shape of the horn cylinder.

Moreover, it is formed to have a slightly larger diameter than the outer diameter of the groove 3.

Next, a groove 3 formed in the plate 1 forming the horn cylinder body.
The plate 4 forming the folds is fitted into the plate.

The plate 1 forming the horn cylinder and the plate 4 forming the folds are formed into the shape of a corrugated horn, as shown in FIGS. 1(B) and 1(C).

Next, the mating portion 2 of the plate 10 forming the horn cylinder body is
are connected by soldering, welding, etc.

Furthermore, after positioning the plate 1 forming the horn cylinder and the plate 4 forming the folds fitted into the groove 1 formed in the plate 1 of the horn cylinder in a concentric manner, Connect and fix electrically by attaching or welding.

Then at both longitudinal ends of the assembly of plate 1 forming the horn cylinder and plate 4 forming the folds.

Attach the end flanges 5 and 6 by soldering, welding, etc.

Note that the end flanges 5 and 6 are provided with holes 7 for attachment in advance 1, and the outer circumferential surface of the assembly of the plate 1 forming the horn cylinder and the plate 4 forming the pleats. Attach the reinforcing material 8 to.

This reinforcing material 8 is made of, for example, urethane.

A mantle made of synthetic resin such as styrofoam may be wrapped around the outer circumference of the assembly, or the molten synthetic resin material may be applied while slowly rotating the assembly to achieve a uniform thickness. .

As shown in FIG. 2, the corrugated horn as a product manufactured by the above-mentioned process includes a plate 4 having pleats at predetermined intervals in the length direction of the plate 1 forming the horn cylinder body.
are arranged and configured into fixed shell types. Further, in this corrugated horn, a reinforcing material 8 is provided on the outer peripheral surface of the assembly of a plate 1 forming a pawn cylinder and a plate 4 forming a pleat. This reinforcing material 8 prevents deformation of the corrugated horn due to external pressure, impact, etc., and maintains its shape so that the plate 1 forming the horn cylinder body and the plate 4 forming the folds do not disintegrate. There is.

Next, FIG. 4 shows another embodiment of the present invention.

In the embodiment shown in FIG. 4, the horn cylinder 10 has a semi-conical first shape. It is constructed by combining second plates N and +2, and plates 14 forming folds are incorporated inside the horn cylinder body 10 at predetermined intervals in the length direction of the horn cylinder body 10. .

The first part forming the horn cylinder body 10. Second plate 11゜1
2, long circular arc-shaped grooves 13 are formed in advance in the circumferential direction at one interval in the circumferential direction and in the longitudinal direction.

On the other hand, the plate 14 forming the pleats is formed in a hollow shape, and has a diameter that gradually varies according to the shape of the horn cylinder body 10. It's 1.

On the outer circumferential surface of each plate 14 forming the folds, the first. A protrusion 15 is provided which fits into the groove 13 formed in the second plate N, 12.

In this embodiment, a plate 14 forming folds in the groove 13 formed in the first and second plates N and 12 of the horn cylinder body 10 is provided.
Insert the protrusions 15 provided in each.

The first part of the horn cylinder body 10. The second plate N,+2 and the plate 14 forming the folds are formed into the shape of a corrugated horn.

Then, the mating surfaces of the 11th and 12th plates N and 12 of the horn cylinder body IO are joined together by soldering, welding, or the like.

Further, on the outer peripheral surface of the horn cylindrical body 10, the first and second plates N, 12 and the protrusions 15 of the plate 14 forming the folds are connected by soldering, welding, etc. 1st. the second plate N, +2 and the plate 1 forming the folds;
4. Electrically connect and fix.

Next, the first. Second plate 11°・
8 and 12 and at both ends of the assembly of plates 14 forming the folds,
For installation, use end flanges 16°17 with holes 18 for
Attach by soldering, welding, etc.

In addition, a reinforcing material (see Figure 2) is added to the outer periphery of the assembly.
and manufacture the corrugated hoe as a product.

Of course, the present invention is applicable not only to the production of the conical corrugated horn shown in the drawings, but also to the production of pyramidal corrugated horns.

〔Effect of the invention〕

According to the present invention described above, the horn cylinder body and the pleats are each formed separately from conductive plates, and the plate forming the horn cylinder body is formed with a groove into which the plate forming the pleats is fitted, The plate forming the pleats is fitted into this groove, the plate forming the horn cylinder body and the plate forming the pleats are formed into the shape of a corrugated horn, and the plate forming the horn cylinder body and the pleats are formed. Since the plates are electrically connected and fixed, machining using an NC lathe or the like for forming the folds can be completely omitted, resulting in an advantage that manufacturing can be done at low cost.

Furthermore, according to the present invention, the plate forming the horn cylinder, the groove into which the plate forming the pleats is fitted, and the plate forming the pleats can be individually machined with precision, making it possible to manufacture a high-precision corrugated horn. There are benefits to be gained.

Further, according to the present invention, the plate forming the horn cylinder can be freely manufactured into a conical or pyramidal shape, and the plate forming the folds can be easily manufactured into a circular or polygonal shape to match this. Since the intervals between the grooves to be fitted can be freely formed, corrugated horns of various shapes can be easily manufactured.

Moreover, according to the present invention, the horn cylinder body and the pleats are each formed of a plate, and the plate forming the pleats is fitted into the groove formed in the horn cylinder body to fix the corrugated horn. The entire structure can be made into a shell type, which makes it lightweight and suitable for mass production.

[Brief explanation of drawings]

Figures 1 (, n), (B), and (c) show one embodiment of the present invention, and are perspective views showing the shapes and processes of a plate forming a horn cylinder and a plate forming pleats. , Fig. 2 is a longitudinal sectional view of a corrugated horn as a product, Fig. 3 is a right side view of Fig. 2, and Fig. 4 shows another embodiment of the present invention, showing the shape and arrangement of each part. FIG. 1...Plate forming the horn cylinder body 3...Groove 4 into which the plate forming the folds is fitted. ...... Plate forming the folds 5.6 ...... End flange 8.
・・・・・・・・・・・・・・・Reinforcement material 10・・・・・・
. . . Horn cylinder 11.12 . . . First horn cylinder forming the horn cylinder. Second plate 13...Groove into which the plate forming the pleats is fitted 14...Plate forming the pleats 15
・・・・・・・・・Protrusion Is provided on the plate forming the folds, 17・・・・・・ End flange agent Patent attorney Katsuo Ogawa Figure 2 B 4: Long F formation Plate 5.6: D flat sheet 8: Reinforcement material Figure 3

Claims (1)

[Claims] 1. A method for manufacturing a corrugated horn in which conductive folds are arranged inside a conductive horn cylinder at predetermined intervals in the length direction of the horn cylinder, wherein the horn cylinder and the folds are arranged at predetermined intervals in the length direction of the horn cylinder. Each of the horn cylinders is formed individually from a conductive plate, and the plate forming the horn cylinder is formed with a groove into which the plate forming the pleats is fitted, and the plate forming the pleats is fitted into the groove. A plate forming the horn body and a plate forming the folds are formed into the shape of a corrugated horn, and the plate forming the horn cylinder body and the plate forming the folds are electrically connected and fixed. A method of manufacturing corrugated horn.