JPS58204988A - Scroll for scroll type compressor and working process thereof - Google Patents

Abstract

PURPOSE:To make it possible to easily carry out the working of an elongated oil channel, by separating an end face plate into two halves so as to form an oil groove therein before a scroll is assembled. CONSTITUTION:A spiral strap plate 2A is fitted into a spiral groove 9 formed in the upper surface of an upper end face plate 3B1 and is jointed to the latter by, for example, resistance welding. Then a lower end face plate 3B2 is jointed to a boss 4B, by for example, frictional pressure welding, and thereafter, both upper and lower plates 3B1, 3B2 are jointed together by, for example, blazing. No subsequent working is necessary to the thus assembled scroll since grooves 7 communicated with holes 5 are already formed, thereby the working time thereof is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a scroll for a scroll compressor, and more particularly to a scroll shape suitable for plastic working.

The external shape of the scroll 1 is shown in FIG. 1, and its longitudinal cross-sectional view is shown in FIG. The scroll 1 is composed of a spiral strip section 2, an end plate section 3, and a boss section 4. And end plate part 3. The boss portion 4 is provided with a hole 5 for supplying lubricating oil and a blind screw 6 on the outermost periphery of the hole.

As a method of manufacturing such a souffler 1 in one piece, a method of cutting and finishing a cast or forged material can be considered, but this method has the following drawbacks. In the case of the cast blank 4'A, the cutting and finishing time is extremely long due to poor dimensional accuracy of the blank. When cold forging iron-based materials, the processing force becomes large and the die is damaged. On the other hand, when hot forging is performed, the machining force is greatly reduced, so mold breakage does not occur, but dimensional accuracy deteriorates and the cutting and finishing time increases, similar to casting. .

Therefore, the current method is to divide the scroll into a spiral fall band plate 2A shown in FIG. 3 and a grooved end plate 6A having a spiral groove 9 with good dimensional accuracy on the surface of the end plate shown in FIG. Each is processed separately, and in the assembly process, the spiral band plate 2Ay2 is inserted into the spiral groove 9 of this grooved end plate 3A, and integrated by brazing, caulking, resistance welding, diffusion bonding, etc. A method using .

On the other hand, the elongated hole (3 mm in diameter, 50 mm in length) 5 provided in the end plate 3 is formed using a drill, but this is difficult because the depth is extremely long compared to the diameter.

The purpose of the present invention is to solve the above-mentioned drawbacks of the prior art, to facilitate processing, and to obtain a scroll that can be easily mass-produced.
An object of the present invention is to provide a scroll for a scroll compressor and a method for processing the same.

That is, the present invention is characterized by a "steel plate" in which the end plates are divided into composite pieces along the entire cross section and joined together by brazing or the like at the end plates with grooves provided on the divided surfaces.
□1 Hereinafter, embodiments according to the present invention will be described using FIGS. 4 and 5.

Here, FIG. 4 is an fIi view of a scroll according to one embodiment of the present invention, and FIG. 5 is a perspective view of a scroll according to another embodiment.

In the figure, 31771 is the upper 1'sl (end plate, 3B2 and 3C2
is the lower end plate, and 3C3 is the middle end plate. Lower end plate 3B
An intermediate end plate S with a cross-shaped shallow groove 7 on one surface of 2.
A cross-shaped void 8 is provided in the CS.

The addition and assembly of each part is performed as follows.

The spiral fall strip 2A is obtained by cutting a strip into a shape corresponding to the length and width of the spiral portion and then bending the strip. The upper end plate 3B1 is more easily cut than a round bar.

The lower end plate 3B2 is obtained by completely forging a cylindrical block rlJ1 and then cutting it into a predetermined shape. boss 4
B can be easily obtained by cutting a round bar or cylindrical material.

Next, a method of assembling the scroll shown in FIG. 5 will be explained. First, the spiral strip 2A and the upper end plate s are connected to the upper end plate s by fitting them into the spiral groove 9, and then the lower end plate 3 and the boss 2 are connected by resistance welding. 4B
f, after joining by friction welding etc., the upper end plate 3B1
and the lower end plate 5B2f are joined by brazing or the like. The scroll assembled in this way does not need to be processed later because the groove 7 continuous with the hole 5 is already provided, and the dimensional accuracy is better than that of cast or forged materials, so the finish is fine. Processing time is also significantly reduced.

Further, the blind screw 6 is also no longer necessary.

Another embodiment will be described using FIG. 6. The scroll having the structure shown in Fig. 6 has a lower end plate "rB" shown in Fig. 5.
2f It is further divided into a lower end plate 3C2 and an intermediate end plate SCS. The lower end plate 6C2 is cut from a cylindrical material,
The intermediate end plate SC3 is easily processed by punching the central part of a disc-shaped thin plate into a cross shape.The assembly method is to join the lower end plate 3C2 and the intermediate end plate 5C3f by brazing or the like. Except for the increase in the number of steps, the steps are exactly the same as those in the method shown in FIG. There is almost no increase in
It is clear that the method shown in FIG. 6 also provides the same effect as the method shown in FIG. 5.

As explained in detail above, the present invention has a structure in which the end plate is completely divided and all the oil grooves are used inside, so there is no need to process a long and narrow oil groove, which was difficult to process in the past. Compared to casting or forging, a scroll material with higher dimensional accuracy can be obtained and the number of cutting and finishing man-hours is reduced, so it has an immediate effect on productivity.

[Brief explanation of drawings]

Figure 1 is an external view of a scroll for a scroll compressor, Figure 2
The figures are a longitudinal sectional view of Fig. 1, Fig. 3 is a view showing the structure of a conventional product, Fig. 4 is a view showing the structure according to an embodiment of the present invention, and Fig. 5 is a view showing the structure of the conventional product.
The figure is a diagram showing the entire configuration according to another embodiment. DESCRIPTION OF SYMBOLS 1... Scroll for scroll compressor, 2... Spiral band plate part, 5... End plate part, 4... Boss part, 5...
Hole, 6... Blind screw, 2A... Spiral band plate, 3
A... Grooved end plate, 3B1... Upper end plate, 6B2...
Lower end plate, 3C2...lower end plate, 6C3...middle end plate, 4B...boss, 7...shallow cross-shaped groove, 8...
・Cross-shaped gap Koma 1 figure 2 hand 3 figure exposed 4 ■

Claims (1)

[Scope of Claims] 1. A scroll compression scroll for a scroll compressor having an oil filler in the end plate portion, characterized in that the end portion is divided into a plurality of parts and the oil filler is formed on the n1 dividing surface. Machine scroll. 2. In the method for processing a scroll for a scroll compressor having an oil filler in the end plate, after processing a groove for trapping oil in at least one of the parts constituting the end plate which is divided into a plurality of parts, A method for processing a scroll for a scroll compressor, characterized by joining and fully forming the armholes.