CN115298440A - Method for manufacturing discharge valve mechanism of compressor and compressor provided with discharge valve mechanism - Google Patents

Abstract

The invention provides a manufacturing method of a valve mounting mechanism for restraining poor riveting when a discharge valve and a valve pressing piece are riveted and fixed on a flange part by a rivet to manufacture the valve mounting mechanism, and a compressor with the discharge valve mechanism. A reference surface (73) and a valve mounting seat surface (56) located at a predetermined distance h1 in the depth direction of the flange portion (51) from the reference surface (73) are formed on one surface of the flange portion (51) by the same tool. A discharge valve (57) and a valve retainer (58) are disposed on the valve mounting seat surface (56), and a rivet (16) is inserted from the other surface of the flange portion (51). The position of the reference surface (73) relative to the other surface of the flange portion (51) is measured, and the discharge valve (57) and the valve pressing member (58) are fixed to the valve mounting seat surface (56) by pressing the rivet (16) with the punch (80) based on the distance h1 of the valve mounting seat surface (56), the thickness of the discharge valve (57), and the thickness of the valve pressing member (58). By this manufacturing method, even when the thickness of the flange portion (51) varies, caulking defects in manufacturing the valve mounting mechanism (100) can be reduced.

Description

Method for manufacturing discharge valve mechanism of compressor and compressor provided with discharge valve mechanism

Technical Field

The present invention relates to a method for manufacturing a discharge valve mechanism provided in a flange portion of a compressor used in a cooling device of an air conditioner or a refrigerator. The present invention also relates to a compressor provided with a discharge valve mechanism used in a cooling device of an air conditioner or a refrigerator.

Background

In a compressor such as a rotary compressor used in a cooling device of an air conditioner or a refrigerator, a refrigerant gas hole extending to a cylinder chamber is formed in a flange portion of a bearing used in the compressor. A discharge valve and a valve pressing member capable of opening and closing the refrigerant gas hole are attached to the flange so as to cover the refrigerant gas hole, and a valve attachment mechanism is formed in the flange. The flow of refrigerant gas in the compressor is regulated by the valve mounting mechanism. As a method of attaching the discharge valve and the valve pressing member to the flange portion, a rivet fastening method is known.

A method of attaching the discharge valve and the valve pressing member to the bearing of the compressor by rivet welding is as follows. A recess is formed in one surface of a flange of a bearing, and a discharge valve and a valve pressing member are disposed in the recess. A rivet is inserted into a rivet hole formed in the recess, and the rivet is inserted through the flange portion, the discharge valve, and the valve pressing member. The upper end of the inserted rivet is pressed into a punch of a riveting machine, and the upper end of the rivet is crushed (riveted) to form a rivet joint. The discharge valve and the valve pressing member are fixed in the recess of the flange portion by the caulking head.

The amount of the riveting machine pressed into the punch is controlled to a certain pressing depth. However, the thickness of the flange portion of each bearing varies due to factors such as abrasion of the grinding wheel and expansion caused by grinding heat when the flange portion is manufactured, and the thickness of the bottom surface of the recess of the flange portion also varies. Due to this deviation, there is a problem that the press-fitting depth of the punch into the bottom surface of the recess of the flange portion is too large or insufficient. For example, when the thickness of the bottom surface of the recess of the flange portion becomes larger than the designed thickness due to variation, the amount of the press-fitting punch of the riveting machine is constant, and therefore the punch is excessively press-fitted into the bottom surface of the recess. In such a case, a caulking failure occurs in which a part of the rivet enters the gap between the discharge valve and the valve pressing member, which causes the discharge valve or the valve pressing member to be damaged during operation of the compressor. In addition, when the thickness of the bottom surface of the recess of the flange portion is reduced due to the variation, the punch is insufficiently pressed into the bottom surface of the recess. In such a case, a caulking failure occurs in which the discharge valve and the valve pressing member cannot be sufficiently fixed to the flange portion by the rivet, which causes displacement or separation of the discharge valve and the valve pressing member during operation of the compressor.

Therefore, the following proposals have been made as a countermeasure against the caulking failure: double circle marks indicating the upper limit and the lower limit of the normal range of the outer diameter of the rivet head are provided on the riveting surface of the valve pressing member, and the size of the rivet head after riveting and the size of the marks are visually compared. In this method, a determination of defective caulking is made when the size of the outer diameter of the caulked head after caulking exceeds a mark indicating the upper limit or does not exceed a mark indicating the lower limit. (see, for example, patent document 1.)

Patent document 1: japanese laid-open patent publication No. 2010-236564

However, this method has a problem that the occurrence of the caulking failure cannot be suppressed although the caulking failure can be detected.

Disclosure of Invention

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a method for manufacturing a discharge valve mechanism capable of suppressing a caulking failure when a discharge valve and a valve pressing member are attached to a flange portion even when the thickness of the flange portion varies, and a compressor including the discharge valve mechanism.

In order to solve the above-described problems, a method of manufacturing a valve attachment mechanism according to the present invention is a method of manufacturing a discharge valve mechanism in which a discharge valve covering a discharge hole and a valve pressing member for restricting deformation of the discharge valve are attached to a flange portion having the discharge hole and a rivet hole by a rivet, wherein a reference surface and a valve attachment seat surface located at a position of a predetermined distance h1 in a depth direction of the flange portion with respect to the reference surface are formed on one surface of the flange portion by the same tool. The discharge valve and the valve pressing member are disposed on the valve mounting seat surface, and a rivet is inserted through a rivet hole formed in the valve mounting seat surface, a first opening of the discharge valve, and a second opening of the valve pressing member from the other surface of the flange portion. The position of the reference surface with respect to the other surface of the flange portion is measured, and the discharge valve and the valve pressing member are fixed to the valve mounting seat surface by pressing the rivet against the one surface with the punch and deforming the rivet based on the distance h1 in the depth direction of the valve mounting seat surface with respect to the reference surface, the thickness of the discharge valve, and the thickness of the valve pressing member.

In the method of manufacturing a valve attachment mechanism according to the present invention, the reference surface and the valve attachment seat surface that is a predetermined distance from the reference surface in the depth direction of the flange portion are formed on one surface of the flange portion by the same tool, the depth of the reference surface is measured, and the rivet is pressed against the one surface by the punch based on the predetermined distance in the depth direction from the reference surface, the thickness of the discharge valve, and the thickness of the valve pressing member.

Drawings

Fig. 1 is a longitudinal sectional view of a rotary compressor according to embodiment 1 of the present invention.

Fig. 2 isbase:Sub>A horizontal sectional view ofbase:Sub>A cylinder block atbase:Sub>A linebase:Sub>A-base:Sub>A' of the rotary compressor in embodiment 1 of the present invention.

Fig. 3 is a plan view showing an upper bearing of the rotary compressor according to embodiment 1 of the present invention.

Fig. 4 is a plan view showing an upper bearing and a valve mounting mechanism in embodiment 1 of the present invention.

Fig. 5 is a perspective view showing the structure of the discharge valve and the valve pressing member periphery of the valve mounting mechanism in embodiment 1 of the present invention.

Fig. 6 is a plan view showing the structure of a discharge valve in embodiment 1 of the present invention.

Fig. 7 is a plan view showing the structure of a valve pressing member in embodiment 1 of the present invention.

Fig. 8 is a plan view showing the position of line B-B' of the valve mounting mechanism in embodiment 1 of the present invention.

Fig. 9 is a sectional view showing a section at line B-B' of the valve mounting mechanism in embodiment 1 of the present invention in a plan view.

Fig. 10 is a schematic view showing a caulking machine and a flange portion when caulking a discharge valve and a valve retainer in embodiment 1 of the present invention.

Fig. 11 is a schematic view showing a caulking machine and a flange portion when caulking a discharge valve and a valve retainer in embodiment 1 of the present invention.

Fig. 12 is a flowchart showing the steps of the method for manufacturing the valve mounting mechanism according to embodiment 1 of the present invention.

Fig. 13 is a schematic diagram showing a manufacturing apparatus of a valve mounting mechanism in embodiment 1 of the present invention.

Detailed Description

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. Here, as for the reference numerals, portions denoted by the same reference numerals are the same, which is common throughout the specification. The embodiments of the constituent elements expressed throughout the specification are merely examples, and are not limited to the embodiments described in the specification. In particular, the shapes of the constituent elements are not limited to those in the embodiments. Moreover, the drawings sometimes show the actual configuration in a simplified manner. In the drawings, the sizes of the respective components and the positional relationship between the components may be different from the actual ones.

In the following description, terms indicating directions (for example, "axial direction", "upper", "lower", and the like) are used as appropriate for easy understanding, but these terms are used for the purpose of description, and do not limit the present invention. In the present specification, the direction of the axis of the shaft when the shaft is mounted in the compressor is referred to as the "axial direction". The terms "upper", "lower" and "lower" indicate relative positional relationships of the respective components when the components are mounted in the compressor and the compressor is viewed from the front.

Embodiment mode 1

Fig. 1 is a sectional view showing an overall structure of a rotary compressor 1 as a compressor in embodiment 1 of the present invention. The rotary compressor 1 is assembled to a cooling circuit to be used as a cooling device of an air conditioner or a refrigerator.

Overall structure of compressor

Fig. 1 is a sectional view of a compressor 1 according to the present embodiment. The compressor 1 is a rotary compressor.

The compressor 1 includes an accumulator 2, a closed casing 10, a suction pipe 14, a discharge pipe 15, a motor 20, a shaft 30, a cylinder block 40, an upper bearing 50, and a lower bearing 60.

The closed casing 10 includes a main body 11, an upper lid 12, and a lower lid 13. The body 11 has a cylindrical shape, for example.

The upper lid portion 12 and the lower lid portion 13 are joined to the main body portion 11. The suction pipe 14 is attached to the main body 11. The accumulator 2 is attached to the suction pipe 14, and the refrigerant is introduced from the accumulator 2 into a suction chamber 46 (shown in fig. 2) of the cylinder 40 through the suction pipe 14.

A discharge pipe 15 is attached to the upper lid portion 12. The sealed container 10 discharges the refrigerant compressed by an eccentric ring 32 described later from the discharge pipe 15. A storage space (not shown) for storing lubricant is provided at the bottom of the closed casing 10.

The motor 20 generates power to rotate the shaft 30. The motor 20 includes a stator 21 and a rotor 22.

The stator 21 is fixed to the main body 11 of the closed casing 10.

The rotor 22 rotates by magnetic interaction with the stator 21.

The shaft 30 is fixed to the rotor 22. The shaft 30 transmits the power of the motor 20 to the compression mechanism 35. An eccentric shaft portion 31 is attached to the shaft 30.

The eccentric shaft portion 31 is a portion having a cylindrical shape with a larger diameter than the shaft 30 and being eccentric in the radial direction of the shaft 30 with respect to the central axis C of the shaft 30 when attached to the shaft 30. A cylindrical eccentric ring 32 is fitted into the eccentric shaft portion 31 so as to be rotatable while being slidable along the eccentric shaft portion 31.

The shaft 30 is inserted through the cylinder 40. The eccentric shaft 31 and the eccentric ring 32 are located in the cylinder 40. The shaft 30 is rotatably held by an upper bearing 50 located above the cylinder block 40 and a lower bearing 60 located below the cylinder block 40. An upper bearing 50 and a lower bearing 60 are provided above and below the cylinder block 40.

Next, the cylinder block 40, the upper bearing 50, and the lower bearing 60 will be described with reference to fig. 2 and 3 in addition to fig. 1.

Fig. 2 isbase:Sub>A cross-sectional view of the cylinder 40 at the cut linebase:Sub>A-base:Sub>A'.

The cylinder 40 is formed in a shape having a cylindrical portion 41 with both ends open in the vertical direction and a protruding portion 42 protruding to the outer peripheral side of the cylindrical portion 41. In fig. 2, the shape of the upper bearing 50 is indicated by a broken line in order to show the positional relationship between the cylinder block 40 and the upper bearing 50. Specific shapes of the upper bearing 50 and the lower bearing 60 will be described with reference to fig. 3 and 4.

As shown in fig. 2, the cylindrical portion 41 is arranged coaxially with the central axis C of the shaft 30.

The inner diameter of the cylindrical portion 41 is formed to have a size in contact with the outer periphery of the eccentric ring 32. The outer diameter of the cylindrical portion 41 is smaller than the inner diameter of the main body portion 11 of the closed casing 10 to prevent deformation due to contact with the closed casing 10.

Inside the cylindrical portion 41, the shaft 30 is rotated by the motor 20, and the eccentric shaft portion 31 is rotated in a state of being eccentric with respect to the central axis C of the shaft 30. Then, the eccentric ring 32 rotates along the eccentric shaft portion 31.

The protruding portion 42 is formed with a blade groove 43 extending from the inner circumferential surface to the outer circumferential surface of the cylindrical portion 41 in the radial direction.

Further, a vane 45 is installed in the vane groove 43. Specifically, the blade 45 is inserted into the blade groove 43 in a state where the tip of the blade 45 is exposed to the inside of the cylindrical portion 41.

Here, the blade 45 is a member that abuts against the eccentric ring 32 to partition the inside of the cylindrical portion 41 into a suction chamber 46 into which a refrigerant is sucked from a suction hole 48 described later and a compression chamber 47 into which the refrigerant in the cylindrical portion 41 is compressed.

The vane groove 43 is connected to the spring receiving hole 49. The spring 49a is accommodated in the spring accommodating hole 49 in a compressed state, and the blade 45 is urged toward the inner peripheral side of the cylinder 40 by the spring 49 a. Then, the vanes 45 are pressed against the eccentric ring 32.

In order to supply the refrigerant into the cylindrical portion 41, the protruding portion 42 is formed with a suction hole 48 penetrating from the outer circumferential surface of the protruding portion 42 to the inner circumferential surface of the cylindrical portion 41.

The suction pipe 14 is inserted into the suction hole 48. By the rotation of the eccentric shaft portion 31 and the rotation of the eccentric ring 32, the refrigerant as the refrigerant is sucked into the interior of the cylindrical portion 41 from the suction hole 48.

The flange portion 51 of the upper bearing 50 and the flange portion 61 of the lower bearing 60 cover the cylindrical portion 41. The dotted line in fig. 2 indicates the position of the outer contour of the flange portion 51 provided above the cylinder block 40.

Fig. 3 is a diagram showing a top view of the upper bearing 50.

In order to discharge the refrigerant from the compression chamber 47 in the cylindrical portion 41, a discharge hole 52 is formed in the flange portion 51 of the upper bearing 50. Similarly, although not shown, a discharge hole is formed in the flange portion of the lower bearing 60 in order to discharge the refrigerant from the compression chamber 47 in the cylindrical portion 41.

The refrigerant sucked from the suction port 48 is compressed by the rotation of the eccentric shaft portion 31 and the eccentric ring 32, and is discharged into the sealed container 10 from the discharge port 52.

As shown in fig. 1 and 2, the compression mechanism 35 includes a cylinder block 40, an upper bearing 50 and a lower bearing 60 that sandwich the cylinder block 40, a shaft 30, an eccentric shaft portion 31, an eccentric ring 32, a suction hole 48, and a vane 45. An eccentric ring 32 is fitted to an eccentric shaft portion 31 of the shaft 10 and eccentrically rotates in the cylinder chamber. In the eccentric ring 11, the inner periphery of the eccentric ring 11 is slidably fitted to the eccentric shaft portion 31 of the shaft 10.

The upper bearing 50 includes a flange portion 51 formed in a flat plate shape and having a ring shape, and a cylindrical bearing portion 53 provided on the flange portion 51.

The bearing portion 53 is a portion for rotatably holding the shaft 30, and is configured by, for example, a slide bearing, a rolling bearing, or the like. As shown in fig. 1, the orientation of the shaft 30 when the shaft 30 is held by the bearing portion is the axis C. In the present specification, the direction parallel to the axis C is referred to as the axial direction or the vertical direction.

The outer diameter of the flange 51 is smaller than the inner diameter of the closed casing 10 and larger than the cylindrical portion 41 of the cylinder 40. The flange portion 51 abuts on an end surface on the upper surface side of the cylinder 40, and covers the open upper surface side of the cylindrical portion 41 of the cylinder 40.

The lower bearing 60 includes a flange portion 61 formed in a flat plate shape and in a ring shape, and a cylindrical bearing portion 63 provided below the flange portion 61, similarly to the upper bearing 50.

The bearing 63 is a portion that rotatably holds the shaft 30, and is configured by, for example, a slide bearing, a rolling bearing, or the like.

The flange portion 61 has an outer diameter smaller than the inner diameter of the closed casing 10 and larger than the cylindrical portion 41 of the cylinder 40. The flange portion 61 abuts on an end surface on the lower surface side of the cylinder 40, and covers the open lower surface side of the cylindrical portion 41 of the cylinder 40.

As shown in fig. 3, a discharge hole 52 and a rivet hole 54 through which a rivet passes are formed in the upper surface of the flange portion 51 so as to vertically penetrate the flange portion 51.

The upper surface of the flange 51 is cut by a cutting tool such as an end mill tool to form a valve seat 55 as a first recess. Valve seat 55 contains exhaust hole 52 and rivet hole 54.

As shown in fig. 3, the valve seat 55 has a circular region 55a formed around the discharge hole 52, and a linear region 55b connected to the circular region 55a and formed to extend linearly. A valve seating surface 56 is formed on the bottom surface of the linear region 55. Valve mounting seat surface 56 contains rivet holes 54. As shown in fig. 10 described later, the circular region 55a has a circular region D formed lower than the valve mounting seat surface 56, and the circular region D is slightly larger around the discharge hole 52 so as to surround the discharge hole 52. The region D has a shape of a convex bulge to the open end of the discharge hole 52. With such a structure, when the discharge valve 57 and the valve holding member 58 are attached to the valve attachment seat surface 56, the refrigerant can easily flow from the compression chamber 47 through the discharge hole 52 during the operation of the compression mechanism 35, and an effect of preventing the refrigerant from flowing backward into the compression chamber 47 can be obtained. Rivet hole 54 extends continuously in the axial direction from valve seating surface 56 to the lower surface of flange portion 51. The discharge hole 52 extends continuously in the axial direction from the surface of the region D to the lower surface of the flange portion 51.

Fig. 3 shows a linear region 55 formed by an end mill tool on the upper surface of the flange portion 51, and a valve attachment seat surface 56. The width of the linear region 55b is D1, the width D1 is larger than the diameter of the rivet hole 54, and the terminal end portion of the linear region 55b is formed by the arc of a circle having the diameter D1.

A reference surface processing hole 72 is formed in the flange portion 51 on the upper surface of the flange portion 51 separately from the valve mounting seat surface 56, and the reference surface processing hole 72 is a second recess having a diameter D2 equal to the diameter D1. The reference surface machining hole 72 is formed by cutting the upper surface of the flange portion 51 with a cutting tool such as an end mill tool similar to the tool for forming the linear region 55. The bottom surface of the reference surface processing hole 72 serves as a reference surface 73.

Fig. 4 is a plan view of the upper bearing 50.

In fig. 4, a plate spring-like discharge valve 57 and a valve pressing member 58 attached to the discharge valve 57 in a superposed manner are disposed on the valve attachment seat surface 56 on the upper surface of the flange portion 51 so as to cover the discharge hole 52. The end of the rivet 16 (rivet head) can be confirmed above the valve pressing piece 58.

In the present embodiment, a structure in which the upper bearing 50 includes the bearing portion 53 and the flange portion 51, and the discharge valve 57 and the valve pressing member 58 are attached to the valve attachment seat surface 56 of the flange portion 51 by the rivet 16 is referred to as a valve attachment mechanism 200.

Fig. 5 is a perspective view showing the configuration of the discharge valve 57 and the valve pressing piece 58 on the valve installation seat surface 56.

Both the discharge valve 57 and the valve pressing member 58 are mounted in a cantilever manner in the valve seat 55 by one rivet 16 inserted through the rivet hole 54. The end of the rivet 16 is riveted to form a rivet head on the valve pressing member 58. In fig. 5, the region D is omitted for simplicity.

As shown in fig. 5, the open end 59 as the other end of the discharge valve 57 is not fixed by the rivet 16, and the open end 59 can move upward. With the above-described structure, when the pressure of the refrigerant compressed in the cylinder 40 exceeds a predetermined discharge pressure, the open end 59 of the discharge valve 57 disposed in the flange portion 51 is elastically deformed toward the valve presser 58 by the discharge pressure of the refrigerant. The elastically deformed discharge valve 57 opens the discharge port 52, and the compressed refrigerant is discharged into the closed casing 10 through the discharge port 52.

The valve pressing member 58 is a device for restricting elastic deformation of the discharge valve 57. The valve pressing member 58 has an adhesion preventing opening 74 at the other end. The adhesion preventing opening 74 is located at a position overlapping the discharge hole 52 in a direction orthogonal to the upper surface of the flange portion 51 when the valve pressing member 58 is caulked and fixed to the valve attachment seat surface 56. The adhesion preventing opening 74 is provided to prevent the open end 59 of the discharge valve 57 from adhering to the valve holder 58.

The discharge valve 57 functions as a check valve for preventing the high-pressure refrigerant in the closed casing 10 from flowing backward into the compression chamber 47 during the compression stroke. The discharge valve 57 also functions as a check valve when the compressor 1 is stopped.

Fig. 6 is a plan view showing the configuration of the discharge valve 57.

Fig. 7 is a plan view showing the configuration of the valve pressing piece 58.

As shown in fig. 6, the discharge valve 57 is formed with a first opening 70 at one end. As shown in fig. 7, the valve pressing member 58 is formed with a second opening 71 at one end. The rivet 16 inserted through the rivet hole 54 from the lower surface of the flange portion 51 is inserted through the first opening 70 of the discharge valve 57 and the second opening 71 of the valve pressing member 58. The tip end of the rivet 16 inserted through the first opening 70 of the discharge valve 57 and the second opening 71 of the valve pressing member 58 is crushed from above by a punch 80 of a caulking apparatus 300 shown in fig. 10, which will be described later, and the discharge valve 57 and the valve pressing member 58 are caulked and fixed to the valve mounting seat surface 56 of the flange portion 51.

The structure of the valve mounting seat surface 56, the discharge hole 52, the discharge valve 57, the valve pressing member 58, and the valve pressing member 58 formed on the upper surface of the flange portion 51 of the upper bearing 50 is the same as the structure of the valve mounting seat surface, the discharge hole, the discharge valve, the valve pressing member, and the valve pressing member formed on the lower surface of the flange portion of the lower bearing 60 when the flange portion 51 is turned upside down. Further, the methods of attaching the discharge valve and the valve holder to the flange portions of the upper bearing 50 and the lower bearing 60 are common. In view of such features, in the present specification, the structure of the upper surface of the flange portion 51 of the upper bearing 50 will be described, and the structure of the lower surface of the flange portion of the lower bearing 8 will not be described.

The valve mounting mechanism 100 according to the present embodiment is manufactured by a manufacturing method in which caulking is performed with reference to the reference surface 73. A method of manufacturing the valve mounting mechanism 100 by caulking the rivet 16 according to the present embodiment will be described below.

Fig. 9 is a cross-sectional view of a cross-section of the flange portion 51 provided with the valve mounting mechanism 100 at the line B-B' of fig. 8, which is developed in plan view. The line B-B' includes a straight line passing through the center of the reference plane processing hole 72 and a straight line passing through the center of the rivet hole 54 in a direction orthogonal to the extending direction of the straight line region 55B.

The reference surface 73 and the valve mounting seat surface 56 are formed by cutting an upper surface, which is one surface of the flange portion 51, with the same cutting tool (not shown). The reference surface 73 and the valve mounting seat surface 56 are formed parallel to the lower surface, which is the other surface of the flange portion 51.

As shown in fig. 9, the reference surface 73 and the valve mounting seat surface 56 are formed on the upper surface of the flange portion 51 in such a manner that the depth from the upper surface of the flange portion 51 to the valve mounting seat surface 56 is larger than the depth from the upper surface of the flange portion 51 to the reference surface 73. The reference surface 73 is formed so that the depth from the upper surface of the flange 51 becomes 1mm or less.

By forming the reference surface 73 and the valve mounting seat surface 56 by the same processing machine and the same cutting tool, even when the flange portion 51 has a variation in thickness, the difference h1 between the depth from the upper surface of the flange portion 51 to the valve mounting seat surface 56 and the depth from the upper surface of the flange portion 51 to the reference surface 73 is constant within a variation range of 0.02 mm.

In the present embodiment, the depth of the reference surface 73 is measured by the measuring stylus 81 of the caulking apparatus 300, and the position lower than the reference value by h1 is regarded as the depth of the valve mounting seat surface 56 with the measured depth of the reference surface 73 as the reference value. Based on the depth of the valve mounting seat surface 56, the amount of lowering of a punch 80 described later is determined, and caulking is performed.

As shown in fig. 3, a width D1 of a linear region 55b formed by linearly extending from a circular region 55a around the discharge hole 52 formed on the upper surface of the flange portion 51 is equal to the diameter D2 of the reference plane machining hole 72. Thus, when the upper surface of the flange portion 51 is cut by a cutting tool such as an end mill using a numerically controlled milling machine or the like, the valve mounting seat surface 56 and the reference surface machining hole 72 can be formed using an end mill having one diameter, without using a plurality of end mills having different diameters. By such machining, the trouble of replacing the end mill when machining the valve mounting seat surface 56 and the reference surface machining hole 72 is eliminated, and therefore the machining of the valve mounting seat surface 56 and the reference surface machining hole 72 is facilitated.

The valve seat 55 has a valve mounting seat surface 56 on the bottom thereof, to which the discharge valve 57 and the valve pressing member 58 are mounted. The upper bearing 50, the discharge valve 57, the valve pressing member 58, and the rivet 16 constitute a valve mounting mechanism 100 for a compressor.

In the present embodiment, although the width D1 and the diameter D2 are the same size, even when the diameter of the tool such as an end mill that forms the reference surface machining hole 72 is smaller than the width D1 of the linear region 55b that is a part of the valve seat 55 and D1 > D2, the tool and the machining machine used when machining the valve seat 55 and the reference surface machining hole 72 may be the same tool and the machining machine, and D1 > D2 may be used. Similarly, if the tool and the machining machine used for machining the linear region 55b and the reference surface machining hole 72, which are part of the valve seat 55, are the same tool and the same machining machine, D1 < D2 may be used.

The reference surface processing hole 72 is formed in the upper surface of the flange portion 51 such that the reference surface 73 is located directly below the measuring contact 86 of the measuring tool 84 of the rivet fixing machine 200 when the flange portion 51 is placed on the stage 75 of the rivet fixing machine 200 and the riveting punch 80 is aligned directly above the rivet 16. With this configuration, when the reference surface 73 is measured by the measuring feeler 86 and caulking-fixed by the punch 80 based on the measurement value of the reference surface 73, the movement operation of the stage 75 becomes unnecessary, and the caulking process becomes simple. However, this is merely an example, and the reference surface processing hole 72 may be formed at any position apart from the valve seat 55 on the upper surface of the flange portion 51 as long as the function of the compression mechanism 35 is not impaired.

The valve mounting seat surface 56 is parallel to the reference surface 73, and the press-fitting depth of the caulking portion into the valve mounting seat surface is determined based on the reference surface 73, and caulking is performed. Further, since the reference surface 73 and the valve mounting seat surface 56 are formed parallel to the lower surface that is the other surface of the flange portion 51, and the lower surface of the flange portion 51 is formed in a planar shape so as to coincide with the upper surface of the stage 75, the valve mounting seat surface 56 is orthogonal to the direction in which the punch 80 is pressed. The reference surface 73 is orthogonal to the direction in which the measuring stylus 86 descends. By forming the reference surface 73 and the valve mounting seat surface 56 in this manner, the depth of the valve mounting seat surface 56 from the reference surface 73 can be determined by measuring one point of the reference surface 73.

Mounting method of valve mounting mechanism

Next, a method of forming the valve mounting mechanism 100 by rivet-fitting the discharge valve 57 and the valve pressing member 58 to the valve mounting seat surface 56 of the flange portion 51 will be described.

The reference surface 73 and the valve mounting seat surface 56 are formed on the upper surface of the flange portion 51 by cutting the upper surface of the flange portion 51 with the same tool.

The discharge valve 57 and the valve pressing member 58 are superposed on the valve mounting seat surface 56 of the valve seat 55, which is the first recessed portion of the flange portion, and the valve pressing member 58 is disposed above the discharge valve 57. At this time, the discharge valve 57 and the valve pressing member 58 are disposed on the valve mounting seat surface 56 such that the first opening 70 of the valve pressing member 58 and the second opening 71 of the discharge valve 57 overlap the rivet hole 54.

Next, the rivet 16 is inserted through the rivet hole 54 from the lower surface of the flange portion 51. Next, the rivet 16 protruding from the rivet hole 54 on the upper surface of the flange portion 51 is passed through the first opening 70 and the second opening 71 of the discharge valve 57 and the valve presser 58. Finally, the end of the rivet 16 penetrating the flange portion 51, the discharge valve 57, and the valve pressing member 58 is crushed (swaged) by the punch 80 of the swaging fixing machine 300, and the discharge valve 57 and the valve pressing member 58 are fixed (swaged and fixed by the rivet 16) to the valve seat 55 of the flange portion 51 by the rivet 16. Further, the end portion 16a on the lower surface side of the flange portion 51 of the rivet 16 has a shape having a diameter larger than the rivet hole 54 and protruding downward so that the rivet 16 does not fall off from the rivet hole 54.

Fig. 10 is a schematic view showing an example in which the flange portion 51 is provided in the caulking machine 200, and the discharge valve 57 and the valve pressing member 58 are fixed to the flange portion 51 by the rivet 16 by the caulking machine 200. In fig. 10, the flange portion 51, the valve mounting seat surface 56, the rivet 16, the discharge valve 57, and the valve pressing member 58 are shown in a sectional view in a direction crossing the center of the rivet hole 54 and the discharge hole 52 of the valve mounting seat surface 56.

Fig. 11 is a schematic view showing an example in which the flange portion 51 is provided in the caulking machine 200, and the discharge valve 57 and the valve pressing member 58 are fixed to the flange portion 51 by the caulking machine 200 with the rivet 16. In fig. 11, the discharge valve 57 and the valve pressing piece 58 are disposed in the valve seat 55. Fig. 10 shows the flange portion 51, the reference surface 73, the valve mounting seat surface 56, the rivet 16, the discharge valve 57, and the valve pressing member 58 in a sectional view in a direction in which the reference surface 73 and the valve mounting seat surface 56 are crossed from the center axis C of the bearing portion 51, similarly to fig. 9.

As shown in fig. 10 and 11, the caulking fixing machine 200 includes a stage 75, a support body 76, a punch 80, a vertical servo motor 81, a rotational servo motor 82, a discharge valve and valve pressing member fixing jig 83, a measuring instrument 84, an adjustment knob 85, a measurement contact 86, a control section 87, a determination section 88, and a spring 89.

When the upper bearing is provided on the stage 75 such that the bearing portion is positioned above, the vertical servo motor 81 supports the punch 80 movably in the direction of a perpendicular line to the upper surface of the stage 75, that is, in the thickness (depth) direction of the flange portion 51. The same applies to the lower bearing. The rotational direction servo motor 82 rotatably supports the punch 80. The vertical servomotor 81, the rotational servomotor 82, and the measuring instrument 84 are fixed to the support body 76. The discharge valve and the valve pressing member fixing jig 83 are supported by the support body 76 via a spring 89. The support body 76 is fixed to a base 78 (not shown) below the stage 75 by a fixing portion 77 (not shown). The stage 75 is slidable on the base 78 in the horizontal direction, i.e., in the direction perpendicular to the moving direction of the punch 80.

The measuring instrument 84 measures a position from the surface of the stage 75 (the lower surface that is the other surface of the flange portion 51) in a direction perpendicular to the upper surface of the stage 75, that is, in a thickness (depth) direction of the flange portion 51 of the surface with which the measuring tip 86 contacts. The measuring instrument 84 sends the position of the surface with which the measuring tip 86 contacts to the determination section 88.

The determination unit 88 includes a storage unit 88a (not shown) and a calculation unit 88b (not shown), and the storage unit 88a stores a distance h1 in the depth direction of the flange portion 51 between the reference surface 73 and the valve mounting seat surface 56. The calculation unit 88b determines the amount of lowering of the punch 80 in the thickness (depth) direction of the flange portion 51 by the distance h1 in the depth direction of the flange portion 51 between the reference surface read out from the storage unit 88a and the valve mounting seat surface, with the position of the reference surface 73 measured by the measurement probe 86 in the thickness (depth) direction of the flange portion 51 with respect to the surface of the stage 75 as a reference value. The calculation unit 88b transmits the amount of the punch 80 that is lowered in the thickness (depth) direction of the flange portion 51 to the control unit 87.

The control unit 87 controls the vertical servomotor 81 and the punch rotating direction servomotor 82 based on the amount of lowering of the punch 80 in the thickness (depth) direction of the flange portion 51, which is sent from the calculation unit 88 b. By controlling the vertical servo motor 81 and the punch rotation direction servo motor 82 by the control unit 87, the punch 80 descends in the thickness (depth) direction of the flange portion 51 from the upper surface side of the flange portion 51 toward the valve mount seat surface 58 while rotating, and performs press-fitting and caulking processing on the rivet 16. The vertical servo motor 81 moves the discharge valve and the valve pressing member fixing jig 83, the measuring instrument 84, the adjustment knob 85, and the measurement contactor 86 up and down in the direction perpendicular to the upper surface of the stage 75, in addition to the punch 80. The discharge valve and valve pressing member fixing jig 83 is a jig for temporarily fixing the discharge valve 57 and the valve pressing member 58 by pressing them against the valve mounting seat surface 56.

The discharge valve and valve pressing member fixing jig 83 temporarily fixes the discharge valve 57 and the valve pressing member 58 to the flange portion 51 by receiving a downward spring force from a pressing spring 89 provided in the support body 76 attached to the vertical servo motor 81.

The discharge valve and the valve pressing member fixing jig 83 are lowered by the vertical servo motor 81 in a direction perpendicular to the upper surface of the stage 75, whereby the discharge valve and the valve pressing member fixing jig 83 are brought into contact with the valve pressing member 58, and the discharge valve and the valve pressing member fixing jig 83 brought into contact with the valve pressing member 58 are pushed into the stage 75 side by the vertical servo motor 81. Thus, it is possible to suppress the occurrence of a gap between the valve mounting seat surface 56 and the discharge valve 57 and between the discharge valve 57 and the valve pressing member 58. By performing the caulking process of the rivet 16 while preventing the occurrence of the gap by the discharge valve and the valve pressing jig 83, it is possible to suppress a part of the rivet 16 from being pushed out between the valve mounting seat surface 56 and the discharge valve 57 or between the discharge valve 57 and the valve pressing member 58.

After the discharge valve 57 and the valve pressing member 58 are temporarily fixed to the flange portion 51, the punch 80 rotated by the punch rotating direction servo motor 82 is pushed downward by the vertical direction servo motor 81. The punch 80 contacts the tip end portion of the rivet 16, and the punch 80 presses the rivet 16 downward while the rivet 16 rotates, whereby the tip end portion of the rivet 16 is crushed to be wider than the first opening 70 and the second opening 71, and the discharge valve 57 and the valve pressing member 58 are fixed to the valve mounting seat surface 56.

As shown in fig. 7 and 8, with respect to reference surface 73 provided on the upper surface of flange portion 52, measurement contact 86 of caulking apparatus 200 is lowered in the direction of a perpendicular line with respect to the upper surface of stage 75 to come into contact with reference surface 73. The position (height) of the reference surface 73 from the upper surface of the stage 75 of the caulking apparatus 200 is measured by the measuring stylus 86.

The position lower by h1 than the reference value in the direction of the perpendicular to the upper surface of the stage 75 is regarded as the position (height) of the valve mounting seat surface 56, with the measured position of the reference surface 73 as the reference value.

The calculation unit 88b calculates a value h2 obtained by subtracting a reference value of the thickness of the discharge valve 57, the thickness of the valve pressing member 58, and the thickness of the head portion of the machined rivet on the valve pressing member 58 from h1, and the control unit 87 operates the vertical servomotor 31a so that the center of the recess at the tip of the punch 80 is lowered to a position lower than the reference value by h 2. In this way, the control of the punch 80 by the control unit 87 enables the discharge valve 57 and the valve pressing member 58 to be stably attached to the seating surface 17b by rivet fastening without being affected by the deviation of the valve seating surface 17b from the bottom surface of the flange portion 51. Although the measurement contactor 86 measures the position (height) of the reference surface 73 from the upper surface of the stage 75, the measurement contactor 86 is not limited to this, and the position of the reference surface 73 from the upper surface of the stage 75 may not be measured as long as the reference value can be set.

Fig. 12 is a flowchart of a manufacturing method of fixing the discharge valve 57 and the valve holder 58 to the flange portion 51 by caulking according to the present embodiment. In the following description, a method of fixing the discharge valve 57 and the valve pressing member 58 to the flange portion 51 of the upper bearing 50 of the compressor 1 by caulking will be described.

The reference surface 73 and the valve mounting seat surface 56 are formed on the upper surface of the flange portion 51, which is one surface of the flange portion, by cutting the upper surface of the flange portion 51 with the same tool (step S1).

The discharge valve 57 and the valve pressing member 58 are arranged to overlap each other on the valve mounting seat surface 56 formed on the upper surface of the flange portion 51 in step S1 so that the valve pressing member 58 is positioned above the discharge valve 57 (step S2). The rivet 16 is inserted through the rivet hole 54 of the flange portion 51, the first opening 71 of the discharge valve 57, and the second opening 72 of the valve pressing member 58 from the other surface of the flange portion 51, that is, the rear surface of the flange portion 51 (step S3). The flange portion 51 is placed on the stage 75 of the caulking machine 300 so that the valve mounting seat surface 56 is positioned above, and the work is put into the caulking machine 300 (step S4).

When the flange portion 51 is input to the caulking jig 300 in step S4, the caulking jig 300 checks the flange portion 51 with a sensor (not shown). When the rivet fixing machine 300 confirms the flange portion 51 by the sensor, the flange portion 51 is conveyed into the rivet fixing machine 300 (workpiece is determined, step S5).

When the conveyance of the flange portion 51 into the clincher 300 is completed in step S5, the vertical servo motor 81 and the punch rotation direction servo motor 82 of the clincher 300 are operated (step S6).

The measuring feeler 86 is lowered by the vertical servomotor 81 operated in step S6, and the measuring feeler 86 is brought into contact with the reference surface 73 of the flange portion 51 (step S7).

When the measuring feeler 86 lowered in step S7 comes into contact with the reference surface of the flange portion 51, the determining unit 88 of the caulking fixing machine 300 performs zero setting of the measuring feeler 86 so that the height of the measuring feeler 86 in contact with the reference surface 73 becomes 0. Since the difference h1 in depth from the reference surface 73 to the valve mounting seat surface 56 is set to a constant value in advance by a tool such as an end mill, the depth of press-fitting of the punch 80 suitable for rivet caulking of the valve seat 56 can be set by zeroing the measurement contact 86 (step S8).

The depth of press-fitting of the punch 80 set in step S8 is transmitted to the control unit 87. When the depth of press-fitting of the punch 80 suitable for rivet setting is transmitted to the control unit 87, the control unit 87 drives the vertical servomotor 81. The punch 80 is lowered toward the valve mounting seat surface 56 by the vertical servo motor 81, and the punch 80 is pushed into the valve seat to a depth of push-in transmitted to the control unit 87 (step S9).

When the press-fitting depth of the punch 80 reaches the press-fitting depth transmitted to the determination unit 88 in step S9, a signal is transmitted from the determination unit 88 to the control unit 87, and the control unit 87 stops the lowering of the vertical servomotor 31 to complete the press-fitting of the punch 80 (step S10). At this time, the tip end portion of the rivet is deformed by the pressing of the punch 80, and the valve pressing member 58 and the discharge valve 57 are attached (crimped and fixed) to the valve attachment seat surface 56 by the deformed rivet.

When the lowering of the vertical servomotor 31 is stopped in step S10 and the ram 80 is pressed, the control unit 87 sends a signal to reset the origin of the ram 80 (step S11).

After the origin of the punch is reset in step S11, the compressor valve mounting mechanism 200 to which the valve pressing member 58 and the discharge valve 57 are swaged and fixed is carried out and can be taken out (step S12).

The depth of press-fitting of the punch 80 can be appropriately changed by the adjustment knob 85 provided in the caulking jig 300. When the types of the upper bearing 5 and the lower bearing 8 are changed or when the press-in depth of the punch 80 needs to be finely adjusted, the depth is set by the adjustment knob 85.

In the present embodiment, the depth of the reference surface 73 of the flange portion 51 is measured by the measuring feeler 86, and the difference in depth from the reference surface 73 to the valve mounting seat surface 56 is h21, so that the press-in depth of the punch 80 suitable for rivet fastening is set to perform the fastening, but the method of fastening by riveting of the present invention is not limited to this. The discharge valve 57 and the valve pressing member 58 may be inserted into the valve seat 55, the depth of the upper surface of the valve pressing member 58 may be measured by the measuring contact 86, the measured depth of the upper surface of the valve pressing member 58 may be transmitted to the control unit 87, and the vertical servomotor 81 may be press-fitted to the measured depth of the upper surface of the valve pressing member 58 to perform caulking fixation.

In the present embodiment, the servo motor 81 in the vertical direction is used as a motor for lowering the punch 80, the measuring instrument 84, the adjustment knob 85, the measuring contactor 86, the discharge valve, and the valve pressing member fixing jig 83, but the method of caulking of the present invention is not limited to this. The form of the device is not limited as long as it is a mechanism for lowering the punch 80, the measuring instrument 84, the adjustment knob 85, the measuring feeler 86, the discharge valve, and the valve pressing member fixing jig 83, and the device may be a pneumatic type, a hydraulic type, or a cylinder type.

In the present embodiment, the measuring feeler 86 is a contact type measuring feeler, but the measuring feeler 86 of the present invention is not limited thereto, and the measuring feeler 86 may be a non-contact type measuring feeler.

Fig. 13 is a schematic diagram showing manufacturing apparatus 300 for manufacturing valve mounting mechanism 100 of compressor 1 in the present embodiment.

As shown in fig. 13, the manufacturing apparatus 300 includes a tray 90. The tray 90 includes four stations, i.e., a first station 90a, a second station 90b, a third station 90c, and a fourth station 90d. Hereinafter, a process of mounting the discharge valve 57 and the valve holder 58 to the upper bearing by rivet processing of a rivet by the manufacturing apparatus 300 will be described. When the upper bearing 50 is carried into the first station 90a with the bearing portion facing upward, the tray 90 rotates by 90 degrees, and the upper bearing 50 moves to the position of the second station 90 b. At the position of the second station 90b, the discharge valve 57 and the valve pressing piece 58 are provided on the valve mounting seat surface 56 in the valve seat 55 formed on the upper surface of the flange portion 51 by an arm 91 not shown. When the discharge valve 57 and the valve pressing member 58 are set to the valve installation seating surface 56, the tray 90 is rotated by 90 degrees from the position of the second station 50b, and the upper bearing 50 is moved to the position of the third station 90 c. A caulking jig 300 shown in fig. 7 and 8 is disposed at the position of the third station 90c, and the discharge valve 57 and the valve pressing piece 58 are riveted to the valve attachment seat surface 56 of the flange portion 51 by caulking at the third station 90 c.

Control of the rivet fixing machine 300 at the time of rivet fixing is shown by a flowchart of fig. 12.

When the discharge valve 57 and the valve pressing member 58 are caulked and fixed to the valve mounting seat surface 56, the tray 90 rotates by 90 degrees from the position of the third station 90c, and the upper bearing 50 moves to the position of the fourth station 90d. At the position of the fourth station 90d, it is confirmed whether there is no gap between the valve mounting seat surface 56 and the discharge valve 57 and between the discharge valve 57 and the valve pressing piece 58, whether the discharge valve 57 and the valve pressing piece 58 are obliquely mounted on the valve mounting seat surface 56, or whether a plurality of discharge valves 57 and valve pressing pieces 58 are mounted, by measuring the height from the back surface of the flange portion 51 to the reference surface 73 and the height from the back surface of the flange portion 51 to the upper surface of the valve pressing piece 58. In this way, by using the reference surface 73, the quality of the caulking fixation can be confirmed.

In the present embodiment, the method of caulking the tray 90 at four stations from the first station 50a to the fourth station 50d has been described, but the number of stations of the tray 90 of the present invention is not limited thereto. As long as the depth of the reference surface 73 can be measured based on the measuring contact 86 or the like before the discharge valve 57 and the valve holder 58 are caulked and fixed to the valve mounting seat surface 56, various modifications can be made to the insertion method of the discharge valve 57, the valve holder 58, and the rivet 16. Further, another processing step may be performed between the measurement of the reference surface 73 and the steps of caulking and fixing the discharge valve 57 and the valve pressing member 58 to the valve attachment seat surface 56.

In the present embodiment, the rotation direction of the tray 90 is shown in the counterclockwise direction, but the rotation direction of the tray 90 according to the present invention is not limited to this, and the rotation direction of the tray 90 may be the clockwise direction.

In the present embodiment, the tray 90 is of a rotary type, but the shape of the tray 90 of the present invention is not limited to this, and the tray may be of a linear type (not shown) as long as the distance from the stage 75 of the reference surface 73 (the thickness from the back surface of the flange portion 51 to the reference surface 73) can be measured based on the measurement contact 86 before the discharge valve 57 and the valve presser 58 are caulked and fixed to the valve attachment seat surface 56.

In the conventional method, after the discharge valve and the valve pressing member are attached to the flange portion by rivet caulking, the outer diameter and height of the rivet head (a portion where the tip end portion of the rivet is crushed by the press-in of the punch of the riveter) of the rivet are measured by using a measuring tool such as a vernier caliper, or the shape of the rivet head is visually determined, thereby determining the caulking failure. However, in this method, although the defective outflow can be prevented, the occurrence of the defect cannot be prevented. In the conventional method, the shape of the clinch head of the rivet after clinching is determined point by a measuring tool or by visual observation, and therefore, it takes time to manufacture the rivet.

In the present embodiment, the distance from the stage 75 of the reference surface 73 (the thickness from the back surface of the flange portion 51 to the reference surface 73) is measured by the measuring contact 86 provided in one caulking jig 200, and the press-in depth of the punch 80 is determined based on the data of the storage portion 88a that stores the predetermined distance in the thickness (depth) direction of the flange portion 51 of the valve mount seat surface 56 with respect to the reference surface 73. By using such a manufacturing method, occurrence of caulking failure when the discharge valve 57 and the valve pressing member 58 are caulked and fixed to the upper surface of the flange portion 51 can be suppressed. In addition, in the present embodiment, since the measurement of the caulking head is not required, the manufacturing process related to the valve mounting mechanism 100 of the compressor 1 can be reduced, and the manufacturing efficiency can be improved.

In addition, in the conventional method, there is a method of detecting thickness variation of the flange portion by performing measurement and inspection, and removing the bearing whose thickness variation is out of the reference from the manufacturing process, thereby suppressing caulking failure. However, this method requires an additional step of measuring and inspecting the thickness of the flange portion, and thus has a problem of an increase in the number of steps. Further, since the occurrence of the thickness variation of the flange portion is abrupt, there is a problem that the abrupt variation cannot be coped with.

In the present embodiment, the distance of the reference surface 73 in the perpendicular direction with respect to the upper surface of the stage 75 (the position of the flange portion 51 in the thickness (depth) direction) is measured by the measuring probe 86, and the press-in depth of the punch 80 is determined based on data of the storage portion 88a that stores in advance the distance of the valve mounting seat surface 56 in the thickness (depth) direction of the flange portion 51 with respect to the reference surface 73. By using such a manufacturing method, even if the thickness of the flange portion 51 varies suddenly, caulking fixation can be stably performed, and occurrence of caulking failure can be suppressed. In addition, in the present embodiment, since it is not necessary to measure the thickness of the flange portion 51 in order to suppress the caulking failure, the manufacturing process related to the valve mounting mechanism 100 of the compressor 1 can be reduced, and the manufacturing efficiency can be improved.

Description of the reference numerals

A compressor; a reservoir; sealing the container; a rivet; a motor; a shaft; a cylinder body; a lower bearing; a lower bearing; an eccentric shaft portion; an eccentric ring; a flange portion; a discharge hole; 53.. A bearing portion; a rivet hole; a valve seat; 56.. A valve mounting seat; a discharge valve; 58.. A valve press; an opening and closing portion; a first opening; 71... A second opening; machining a hole in the datum plane; 73.. A valve mounting mechanism; riveting a fastener; a stage; 80.. A punch; an up-down direction servo motor; 82.. An exhaust valve and valve press fixing jig; a measurer; 85.. Adjust knob; 86.. Measuring contact; a control section; 88.. A determining section; 89... Press spring; manufacturing an apparatus.

Claims (9)

1. A method of manufacturing a discharge valve mechanism in which a discharge valve having a first opening and covering a discharge hole and a valve pressing member having a second opening and restricting deformation of the discharge valve are attached to a flange portion of a compressor having the discharge hole and a rivet hole by a rivet inserted into the rivet hole,

the method for manufacturing the discharge valve mechanism comprises the following steps:

forming a first recess having a valve mounting seat surface and a second recess having a reference surface on one surface of the flange portion by using the same tool, wherein the valve mounting seat surface is formed to be a predetermined distance from the reference surface in a thickness direction of the flange portion;

disposing the discharge valve and the valve pressing member on the valve mounting seat surface;

inserting the rivet from the other surface of the flange portion into the rivet hole formed in the valve mounting seat surface, the first opening of the discharge valve, and the second opening of the valve pressing member;

measuring a position of the reference surface with respect to the other surface of the flange portion; and

and a step of fixing the discharge valve and the valve pressing member to the valve mounting seat surface by pressing the rivet against the one surface with a punch and deforming the rivet based on a distance h1 in a depth direction of the valve mounting seat surface from the reference surface, a thickness of the discharge valve, and a thickness of the valve pressing member.

2. The manufacturing method of a discharge valve mechanism according to claim 1,

the second recess has the shape of a circle,

the first recess has a region extending in a straight line,

the diameter of the circle of the second recess is the same as the width of the region.

3. The manufacturing method of a discharge valve mechanism according to any one of claims 1 to 2,

the valve mounting seat surface is formed parallel to the reference surface.

4. The manufacturing method of a discharge valve mechanism according to any one of claims 1 to 3,

the valve mounting seat surface is formed to be orthogonal to a direction in which the punch is pressed.

5. A bearing for a compressor, wherein,

a discharge valve mechanism manufactured by the manufacturing method according to any one of claims 1 to 4 is provided.

6. A compressor, wherein,

a bearing for a compressor according to claim 5.

7. A discharge valve mechanism for a compressor, wherein,

the discharge valve mechanism for a compressor includes:

a flange portion having a first recess portion having a valve mounting seat surface formed linearly and a second recess portion having a reference surface on one surface;

a discharge valve disposed on the valve mounting seat surface and opening and closing a discharge hole formed in the first recess; and

a valve pressing member disposed on the discharge valve so as to overlap the discharge valve and restricting elastic deformation of the discharge valve,

the discharge valve and the valve pressing member are mounted to the valve mounting seat surface by rivets,

the second recess has the shape of a circle,

the first recess has a region extending in a straight line,

the diameter of the circle of the second recess is the same as the width of the region.

8. The discharge valve mechanism for a compressor according to claim 7,

the valve mounting seat surface is parallel to the datum surface.

9. A compressor, wherein,

a discharge valve mechanism for a compressor according to any one of claims 7 to 8.

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