JPS60220276A - Manufacture of valve plate for compressor - Google Patents

Abstract

PURPOSE:To avoid the diversity of materials and tools and to reduce the production cost by grinding the valve seat of a valve plate material, and then machining the outlet port or inlet port as needed to a desired size. CONSTITUTION:The valve plate material 14' is formed by sintering an outlet port material 14b', a stepped part material 14c' located around the outer perimeter of the outlet port, and a valve seat material 14d' located around the outer perimeter of said material 14c' inside the valve chamber. The material 14' is ground for the valve seat 14d by being rotated and pressed against a tool 15 having a valve seat grinding part 15a and a guide 15b. After this, the stepped part material 14c' is machined with a tool 16 to a desired inner diameter of an outlet port, as needed. In this manufacturing method, only one kind of the valve plate material 14' and tool 15 is required, and so, the manufacturing cost of materials and the cost of tools can substantially be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of manufacturing a valve plate for a compressor.

Conventional Structure and Problems In a typical rotary compressor, as shown in FIG. 1, an electric motor section 2 is located in the upper part of an airtight container 1, and a compressor section 3 is fixed to the lower part thereof. . The compressor section 3 includes a cylinder 4 which is a cylindrical cylinder, a crankshaft 5 driven by the electric motor section 2, a row 26, a peripheral wall member 4' of the cylinder 4, a valve plate 7 that holds both end surfaces of the cylinder 4, and a lower end plate. Consisting of 8,
The valve plate 7 and the lower end plate 8 also serve as bearings.

Further, the valve plate 7 is provided with a discharge valve device 9 and is formed by sintering. 9 discharge valve devices, as shown in Figure 2,
A concave valve chamber 7a is provided in the valve plate 7 parallel to the end surface of the cylinder 4, and a discharge hole 71) communicating with the cylinder 4 is formed in the bottom wall of the valve chamber 7; Valve seat 7
C is provided. Further, a valve body 1o that freely opens and closes a discharge hole 7b is disposed on the bottom wall of the valve chamber 7a, and a valve holder 11 that limits the opening height of the valve body 10 is disposed in the discharge hole 7b.
is attached to the valve body 10''2, and the stator 12 is attached to the valve plate 7.
is fixed.

A conventional manufacturing method for the above-mentioned valve plate is shown in FIGS. 3 and 4. For the purpose of explanation, the completed state and the material state are indicated by the symbol dason ``′.
Distinguish using . The opening 7' of the valve plate 7 is the discharge hole material 7.
It is formed by sintering to the inner diameter d of b' and the center diameter S of the valve seat material 7c/, and the cutting tool 13 is rotated and pressed accordingly,
The tip of the valve seat material 7 C/ is polished. Cutting tool 13
A special valve seat polishing part 13a is molded on the valve seat, and the tip has a guide part 13b, which contacts the discharge hole material 7b'.
The discharge hole material 7b/ is not processed and supports the cutting tool.

Generally, when constructing a compressor, the discharge displacement is often used within a certain range, and the inner diameter d of the discharge hole 71) needs to be changed accordingly. Therefore, as shown in FIG. 4(6) and (0), conventionally, the valve plate material 7' and the cutting tool 13 are formed exclusively for the inner diameters d1, d2, and d3 of the discharge hole 7b, respectively.
We are doing manufacturing.

However, in this valve plate manufacturing method, the inner diameter d of the discharge hole
It is necessary to prepare several types of valve plate materials 7' depending on the situation, which poses problems in terms of material manufacturing and management costs. Also, cutter 1
3 is similarly diversified and has a complicated shape, making it expensive and requiring a great deal of cost for polishing the valve seat 7C. Unfortunately, since the center diameter S of the valve seat 7C changes depending on the inner diameter d of the discharge hole 7b, it is also necessary to change the size of the valve plate 10 that closes the discharge hole 71). Furthermore, the inner diameter d of the discharge hole 7b greatly affects the coefficient of performance of the compressor, so it should be sized to match the discharge displacement. There are many problems in terms of management, such as the impossibility and the inability to create an optimal design.

For the purpose of explanation, the description is limited to the discharge hole 71), but the same applies to suction holes of other compression methods.

OBJECTS OF THE INVENTION (a) An object of the invention is to provide a method for manufacturing a valve plate for a compressor that can prevent diversification of materials and cutting tools and reduce manufacturing costs.

Structure of the Invention ≠ The method for manufacturing a valve plate for a compressor according to the invention involves sintering a discharge hole or a suction hole, a stepped portion on the outer periphery thereof, and a valve seat located on the outer periphery of the stepped portion to produce a valve plate material. The valve seat of this valve plate material is polished, and then, if necessary, the inner diameter of the discharge hole or suction hole is processed to a desired size.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention is shown in FIGS. 5 and 6 below. For the purpose of explanation, the completed state and the material state are distinguished using Dason5...-''.

In the figure, 14' is a valve plate material, which includes a discharge hole material 14b' inside the valve chamber 14a and a step material 14 located on the outer periphery of the discharge hole material 14b'.
0' and a valve seat material 14d' located on the outer periphery of the step material 140' are sintered.

The inner diameter of the discharge hole material 14b' is dl, and the inner diameter of the valve seat material 14d'
The center diameter S3 of the valve plate 7 is formed in consideration of the maximum discharge hole d3 in the design of the valve plate 7.

The valve plate material 14' includes the valve seat polished part 15a and the guide part 1.
The valve seat 14d is rotated and pressed by a cutting tool 15 equipped with a blade 5b and processed as shown in FIG. 5), thereby polishing the valve seat 14d. Thereafter, as shown in FIG. 50, the step material 14C' is finished to the desired inner diameter d of the discharge hole 14b using the cutting tool 16 as required, and the step material 14C' is finished to the desired inner diameter d of the discharge hole 14b as shown in FIGS. The valve seat 14d and the discharge hole 14b are machined as shown in FIG.

With this manufacturing method, after processing the valve seat 14d, the step material 1
In order to process the inner periphery of the valve plate 40' to the desired inner diameter d of the discharge hole 14b as required, only one type of valve plate material 14' and 15 blades are required, instead of having several types of material as in the past. It is possible to significantly reduce the manufacturing and management costs of the blades, as well as the cost of specially shaped cutting tools, and improve productivity. Further, the cutting tool 16 can be a straight cutting tool, so it is very inexpensive. Furthermore, the desired discharge hole 14 can be selected by using the cutting tool 16 as necessary.
Since it is processed to have an inner diameter d of b, the diameter can be easily made to match the discharge displacement of the compressor, and the coefficient of performance of the compressor can be improved. And the discharge hole material 14b
If the inner diameter of ' is set to the minimum discharge hole inner diameter d1 in the design of the valve plate 7, there is no need for machining with the cutter 16. Furthermore, the center diameter S3 of the valve seat 14d has all the discharge hole diameters d1, d2, and d3.
On the other hand, since they are the same, the valve body can also be shared.

Reduce manufacturing and management costs for cutting tools and improve productivity.

You can aim for the top. Furthermore, since the discharge hole can be easily machined to the optimum diameter according to the discharge displacement, the coefficient of performance of the compressor can be improved.

7.

[Brief explanation of drawings]

Figure 1 is a longitudinal sectional view of a conventional compressor, and Figure 2 is a compressor.
3 and 4 are sectional views showing the method of machining the valve seat and discharge hole of the same valve plate, and FIGS. It is a sectional view showing the processing method of the valve seat of the valve plate and the discharge hole part in an example. 14'...Valve plate material, 14b...Discharge hole, 1
4C...Stepped portion, 14d...Valve seat, d...
...Inner diameter. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 (8) Figure 4 (Δ) (B) (C) Figure 5 (A) Figure 6 (A) (B) (S)

Claims (1)

[Claims] A valve plate material for a compressor is formed by sintering a discharge hole or a suction hole, a stepped portion located on the outer periphery thereof, and a valve seat located on the outer periphery of the stepped portion, and the valve seat of this valve plate material is sintered. A method for manufacturing a valve plate for a compressor, which comprises: polishing the discharge hole or suction hole, and then processing the inner diameter of the discharge hole or suction hole to a desired size as necessary.