JPS59208186A - Method of shaping and machining scroll - Google Patents

Abstract

PURPOSE:To provide a method of high precise machining which may be readily materialized in massproduction by forming an engaging flute which is punched by a press on a base and engaging an extruded scroll vane in the flute. CONSTITUTION:A scroll vane 10 is shaped out of alluminum alloy, for example, by the extrusive shaping method thereof. If a shaping die is manufactured up to a high precision of 1/1,000mum, the scroll vane 10 may obtain the same precision of 1/1,000mum when it is taken out of the die. A base 20 is made of alluminum alloy, for example, and has a scroll-like engaging flute 30 provided therein by the press punching method. After the scroll vane 10 is engaged in the engaging flute 30, the scroll vane 10 is integrated with the base 20 by the laser welding, bonding or other method which has a less effect of thermal deformation on a product.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a spiral body, which is a scroll used, for example, in a scroll compressor, and particularly relates to an improvement in a method of forming the spiral body.

[Technical background of the invention and its problems]

The operating principle of a scroll compressor will be explained with reference to FIG. 1. When two scroll bodies 112, which are scrolls, are arranged at different angles and intermeshed with each other, there is no contact between the two scroll bodies 1.2. A limited space 3 is formed extending from the part to the contact part. Now, if one spiral body If the other spiral body 2
On the other hand, if the center O of one spiral body 1 revolves around the center O of the other spiral body 2 with a radius of 0-0, if the spiral body 1 is moved while prohibiting its rotation, a limited space will be created. The volume of 3 gradually decreases.

Figure 1 (B) shows that the revolution angle of the spiral body l is 90° from the state shown in Figure 1 (4), and Figure 1 (C) shows that the revolution angle is 180°.
CD) in the same figure shows p and 270° at ), and the volume of the space 3 thus limited gradually decreases. 36
In (A) rotated by 0°, the rain space is moved to the center, and in the same figure (B) and (C), they are connected to each other and moved further by 90°,
As shown in (B), the space narrows and becomes almost zero in (D). During this time, the outer space that began to open in (B) moves from (C) and (D) to (A) in the same figure, creating a sealed space that admits new fluid.

Therefore, sealed disk-shaped side plates are provided at both axial ends of the spiral body 1.2, and a first side plate is provided at the center of one side plate.
If a discharge hole as shown by 4 in the figure is provided, the fluid taken in on the outside in the radial direction will be compressed and discharged from the discharge hole 4.

Incidentally, in the pressed scroll type compressor, each spiral body 1.2 is constructed as shown in FIG. In order to actually manufacture all of these, for example, a round bar or a cast piece formed with additional machining allowance was attached to an NC cutting machine and machined.

However, all the 4.
The ff degree is affected by the accuracy of the cutting machine. In a scroll compressor, the degree of hardness of the scroll compressor section is □. μ
The gap between the side walls of the double-sided roll is calculated by 5.
Although 11 is always required for an optimum value between ~50μ, it is difficult to satisfy the above requirement in cutting with an NC cutting machine.

Furthermore, in Japanese Patent Application Laid-Open No. 54-159712, a pre-processed product of a scroll for a scroll full compressor having at least a scroll processing portion and a flange portion is molded, and the pre-processed product excluding the upper surface of the scroll processing portion is molded using a mold. A method is disclosed in which a punch provided with a mold capable of forming a predetermined scroll shape is pressed into the upper surface of the scroll processing portion, and the scroll portion is formed by backward extrusion forging. In this case, compared to cutting or casting methods, mass production is superior and the machining time is significantly reduced, but it is still insufficient in terms of high-precision machining.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide a method for forming a spiral body that allows high-precision processing and is excellent in mass production. .

[Summary of the invention]

The present invention is a method of molding a spiral body by completely joining and fixing an extruded spiral blade and a retaining groove to a press-punched paste.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. FIG. 3 shows a spiral body formed by a molding method described later, and this body consists of a spiral blade IO and a pace 20.

The ten spiral blades are formed by extrusion molding, for example, of an aluminum alloy, and the shape accuracy is determined by a forming die. 668
It is manufactured with a high precision of m. As a result, a vortex made of aluminum alloy, for example, is extruded using a forming die, and a spiral engaging groove 3o is formed by press punching.
will be established.

Since press punching is used, the punching precision of the engagement groove 3o is extremely high. After the spiral blade 1o is engaged with the engagement groove 30, the spiral blade lθ and the pace 20 are integrally bonded together by a process that causes small thermal deformation, such as laser welding or bonding. The above welding process can be performed on the punch side of press punching at a pace of 2θ, that is, on the so-called "sloping side", so that this can be used as a groove. Therefore, the overlay is secured, the overlay does not protrude on the end face side of PACE 2o, and the bonding is fixed with little thermal deformation, so the dimensional accuracy after molding remains the same as before joining. . Also,
Since the spiral vane IO is extruded and the PACE 2o is pressed, both are suitable for mass production.

〔Effect of the invention〕

As explained above, according to the present invention, an engagement groove is press punched in the pace, an extruded spiral blade is engaged with the engagement groove, and the spiral blade and the pace are bonded and fixed to form a spiral body. This process allows the molding of each component to maintain high precision, and is also suitable for mass production. Therefore, the accuracy of the spiral body is improved, making it suitable for mass production.

[BRIEF DESCRIPTION OF THE DRAWINGS] 1st round) to 2) are diagrams sequentially explaining the compression principle of a scroll compressor, Figure 2 is a perspective view of a spiral body showing a conventional example of the present invention, and Figure 3 is a diagram sequentially explaining the compression principle of a scroll compressor. FIG. 3 is a vertical cross-sectional view of a spiral body showing an example of MIi according to the present invention. 20... Base, 30... Engagement groove, 10... Spiral vane. Applicant's agent Patent attorney Takehiko Suzue (A) (C) Figure 2 (B) (D) Figure 3

Claims (1)

[Claims] A method for forming a spiral body, which is characterized by providing a retention groove formed by press punching on the pace, engaging an extruded spiral blade in the retention groove, and joining and fixing the spiral blade and the base.