JPS62123640A - Assembler for magnetron - Google Patents

Abstract

PURPOSE:To hold a pole piece and an output antenna lead at a highly accurate interval as well as to make a magnetron possible to be easily assembled in a highly efficient manner, by installing a supporting device supporting a cylindrical work rest, slidably installed on the inner circumference of a cylindrical caulking jig, free of slide motion to this caulking jig, a position regulating guide and a work retainer. CONSTITUTION:A pole piece 15 is mounted on the top of a work rest 36. And, an inner space 42 of an outer cylinder 32 is decompressed whereby the pole piece is attracted to the work rest 36, and an antenna lead piercing through hole 15a is positioned to a slit 46 of a guide 45, thus it is stably locked to a device. Under this state, an anode cylinder 11 is inserting into the pole piece through hole 15a of the antenna lead from an aslant direction by a work retainer 40. And, an opening end 11a of the anode cylinder 11 is fitted in the outer circumference of the pole piece 15. Next, the anode cylinder of an oscillating part body is pressed downward by the work retainer 40, so that the opening end 11a of the anode cylinder is caulked by a caulking claw 33a and locked thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a magnetron assembly apparatus, and more particularly to an apparatus for accurately assembling a magnetron by positioning a pole piece and an output antenna lead.

[Technical background of the invention and its problems] The oscillating section main body 10 of a magnetron for a microwave oven has a structure shown in FIG. In the figure, reference numeral 11 is a copper anode cylinder, 12 is a plurality of radially arranged anode panes, 3 is a filament cathode, 14 and 15 are iron funnel-shaped pole pieces, 16 is an antenna lead, and 17 is an output part metal. container, 18
19 is a metal exhaust pipe, 20 is an output cap, 21 is a cathode support rod, 22.23 is an input part metal container, 24 is a ceramic stem, 25.26 is a cathode input connection terminal. There is. antenna lead 16
The metal exhaust pipe 19 of the output section and the output caps 7', 2 (11 The outer periphery 15b of the pole piece 15 is fitted into the stepped portion of the open end 11g of the anode cylinder 11, and is airtightly handled together with the periphery of the metal container 17. .In addition, the central through hole 15eif of the pole piece
: Provided to form a magnetic flux approximately parallel to the tube axis in the electron interaction space between the anode pane and the cathode and to position the center of the cathode.

By the way, the distance between the output antenna lead 16 and the inner peripheral wall of the pole piece through hole 15m through which it passes greatly affects the high frequency transmission characteristics of the output antenna.
must be assembled with high precision so that the antenna lead passes through the center of the antenna. Therefore, conventionally, as shown in FIGS. 5 and 6, in the assembly process, positioning jigs 27 and 28 were first fitted into the through hole 15a from the inside of the pole piece 15, and the positioning jigs 27 and 28 were fixed at the center of the anode cylinder 11. The antenna lead 16 extending from the anode pane is inserted diagonally.

Then, the antenna lead is positioned so that the flat portion 16m passing through the pole gear through hole 15h is closely held between the jigs 27 and 28, and in this state, the opening of the anode cylinder is caulked. Mechanically fix it to the outer circumference of the pole piece. After that, the output metal container 17 is fitted and welded airtightly. According to the assembly method, a positioning jig with relatively small dimensions is inserted into the pole piece through hole,
It is necessary to insert the antenna leads at predetermined intervals, which is extremely complicated and inefficient if done manually, and requires many steps when automated.

[Purpose of the invention]

The present invention solves the above-mentioned disadvantages and provides a magnetron assembly device that is efficient and can be automated while maintaining a high distance between the pole piece and the output antenna lead.

[Summary of the invention]

This invention relates to a cylindrical caulking jig fixed to a device base and having caulking claws for inwardly caulking a part of an anode cylinder fitted to the outer periphery of a magnetron pole piece; a cylindrical workpiece pedestal that is slidably provided on the inner periphery of the magnetron pole piece and on which the magnetron pole piece is placed, and a support means such as a spring that slidably supports this workpiece pedestal with respect to the caulking jig. This is a magnetron assembly device that is equipped with a guide for regulating the position of the magnetron antenna lead provided on the inner circumference of the workpiece pedestal, and a workpiece holder that holds down the magnetron anode cylinder placed on the workpiece pedestal. .

Thereby, the magnetron can be easily assembled with high efficiency by maintaining a highly accurate spacing between the pole piece and the output antenna lead. It also has the advantage of being easily automated.

[Embodiments of the invention]

Examples thereof will be described below with reference to the drawings.

Identical parts are designated by the same reference numerals.

The apparatus of this embodiment, which is shown in the pre-assembly stage, has the configuration shown in FIG. In the figure, reference numeral 31 denotes a device base, 32 a bottomed cylindrical outer cylinder, 33 a ring clover caulking jig, and 33m a partial circumferential caulking jig formed at four locations on the inner circumference. 34 is a slider having a substantially cylindrical shape; 34a is an antenna lead insertion hole formed in the center; 34b is a support column whose bottom extends downward; 35 is a spring; 36 is a slider mounted on top of the slider; Fixed workpiece pedestal, 32.38 is vacuum hole, 3
9 is a vacuum/4 eve, and 40 is a work clamp.

A through hole 31a is formed in the support column 34b of the slider 34, the base 3, and the outer cylinder 32.

32a and the backing 41, the inner space 42 of the outer cylinder 34 is maintained at a low pressure, and the outer cylinder 34 can be slid up and down against the elastic force of the spring 35. Accordingly, the outer circumferential surfaces of the slider 34 and the workpiece pedestal 36 are also vertically slidable relative to the inner circumferential surfaces of the outer cylinder 32 and the caulking jig 33.

As shown in FIG. 2, the workpiece pedestal 36 has arcuate vacuum holes 37.38 opened in the pole piece receiving surface 36a, and positioning protrusions 43.4 at two locations on the outer periphery.
4 is provided.

Furthermore, a pair of guides 45 for guiding the insertion of the antenna lead are protruded from a part of the inner circumference of the workpiece pedestal 36 at positions corresponding to the positions of the pole piece through holes. The tapered surfaces of these guides 45 correspond to the inner tenor e surface of the pole piece, and the interval G between the slits 46 formed therein matches the width dimension of the flat portion 16a of the antenna lead.

Next, the assembly procedure using this assembly device will be explained. First, as shown in Figure 2, a funnel-shaped pole piece 1 is prepared in advance.
5, cutouts 15d and 15e are formed at positions that match the positions of both protrusions 43 and 44 of the workpiece pedestal 36. This pole piece 15 is attached to the upper surface 36 of the workpiece pedestal 36 of the device.
The notches 15d and 15e are fitted into the protrusions 43 and 44 and placed on the plate m. Then, the internal space 42 of the outer cylinder 32 is depressurized by the vacuum pipe 39. As a result, the pole pieces placed so as to close the vacuum holes 37 and 38 are attracted to the workpiece pedestal 36 and fixed. In this way, the antenna lead penetration hole 15m of the pole piece 15 is positioned with the slit 46 of the guide 45, and the pole piece 15 is stably fixed to the device. In that state, antenna lead 1
6 is incorporated into the anode cylinder 11, which is not shown in the figure. Using the work holder 40 fixed to the cut arm, the antenna lead is inserted diagonally into the pole piece through hole 15m. Then, as shown in FIG. 1, the open end 11a of the anode cylinder 1 is fitted onto the outer periphery of the pole piece 15. In this state, the antenna lead 16 is positioned at the center of the through hole of the pole piece by the guide 45, and the tip end extends into the inner circumferential hole 34& of the slot member 34.

Next, as shown in FIG. 3, the work holder 40 pushes down the work, that is, the anode cylinder 1 of the main body of the full swing section, downward in the figure against the elastic force of the spring 35 as shown by arrow F.

The open end portion 11h of the anode cylinder is partially pressed inward by the circumferential crimping claws 33g formed at four locations on the crimping jig 33, and is pressed against the outer peripheral surface of the pole piece. It is fixed by caulking. This completes the positioning and temporary fixing of the anode cylinder including the antenna lead and the output pole piece.

Note that this figure 3 shows the workpiece pedestal 36 for ease of understanding.
The part without protrusions is shown in a vertical cross-sectional view.

Next, by releasing the presser force F of the workpiece presser 40,
The full swing part main body 10 is attached to the caulking jig 3 by a spring 35.
It is lifted upward from 3. This eliminates the need for upward lifting force of the workpiece presser, and there is no fear that the anode cylinder will come off from the pole piece temporarily fixed by caulking.

Then, if the pressure reduction by the vacuum pipe is released, the full swing section main body 10 can be easily removed from the apparatus, and can be transferred to the next assembly process.

Although the embodiments described above are constructed as separate parts, the present invention is not limited thereto, and for example, the workpiece holder and the slider may be constructed as an integral part, and similarly, the caulking jig and the outer cylinder may be constructed as an integral part. Good too. Alternatively, the integral member may be constructed as a combination of separate parts. Furthermore, the workpiece pedestal or the like may be supported by a hydraulic or air cylinder instead of a spring, and a sequence control mechanism may be provided. Further, the work holding means can also be of the same type. Furthermore, the means for positioning and fixing the pole piece on the workpiece pedestal is not limited to the pressure reducing means, but may be any other suitable fixing means.

〔Effect of the invention〕

As explained above, according to the present invention, the main body of the magnetron oscillator can be assembled easily and efficiently by maintaining a highly accurate spacing between the pole piece and the output antenna lead. It also has the advantage of being easily automated.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view showing an embodiment of the present invention, Fig. 2 is an exploded perspective view of its main parts, Fig. 3 is a longitudinal cross-sectional view explaining its operation, and Fig. 4 shows the main body of the magnetron oscillation part to be assembled. 5 is an exploded perspective view of a main part showing a conventional assembly procedure, and FIG. 6 is a sectional view of a main part thereof. DESCRIPTION OF SYMBOLS 10... Magnetron oscillation part main body, 11... Yoya cylinder, 15... Pole piece, 15d, 15e=notch, 16... Antenna lead, 31... Device base,
33... crimping jig, 33h... crimping claw 36.
... Work pedestal, 35... Spring (1 stage of support),
43.44...Protrusion, 45...Position regulation guide,
46...Slit, 40...Work holder, 37.3
8... Vacuum hole (pressure reducing means). Applicant's Representative Patent Attorney Takehiko Suzue Figure 3 Figure 4 Figure 5

Claims (2)

[Claims] (1) A cylindrical caulking jig 33 that is fixed to the device base 31 and has a caulking claw 33a that caulks inward a part of the anode cylinder that fits on the outer periphery of the magnetron pole piece.
A cylindrical workpiece pedestal 3 is slidably provided on the inner periphery of this caulking jig and on which the magnetron pole piece is placed.
6, a support means 35 for slidably supporting the workpiece pedestal with respect to the caulking jig, a guide 45 for regulating the position of the magnetron antenna lead provided on the inner circumference of the workpiece pedestal, and the A magnetron assembly device comprising a work holder 40 for holding down a magnetron anode cylinder placed on a work holder. (2) A magnetron assembly apparatus according to the claims, comprising a depressurizing means for suctioning a pole piece placed on a workpiece pedestal to the surface of the pedestal.