JPH10252669A - Meshing member working method for turning type displacement fluid machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability by relatively and fixedly arranging a raw material of a first meshing member and a raw material of a second meshing member, simultaneously working a first meshing surface and a second meshing surface, and incorporating both meshing members so that positions put in the corresponding relationship mesh with each other by an offset. SOLUTION: When a first meshing member 1 and a second meshing member 2 are worked, in the first place, a thin plate being a raw material of the first meshing member 1 and the second meshing member 2 is made by punching. The thin plate being a primary raw material is formed of a plate by applying a substance which melts at 200 to 300 deg.C and has an adhesive function since it is necessary to be joined by being superposed later. Next, the thin plates of the first meshing member 1 and the second meshing member 2 made as a primary raw material are respectively superposed on each other. The thin plates of the first meshing member 1 and the second meshing member 2 prepared in this way are joined together after a prescribed time in an atmosphere of 200 to 300 deg.C after adhesion is enhanced from upper and under surfaces by a fastening jig.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to machining of a meshing member of a rotary positive displacement fluid machine having a pair or a plurality of pairs of first and second meshing members which rotate and rotate relatively without rotating. The present invention relates to a method, and particularly to a manufacturing method.

[0002]

2. Description of the Related Art A scroll fluid machine is a typical example of a conventional orbiting positive displacement compressor. In this example, one of the paired meshing members is a revolving scroll wrap that rotates without rotating, and the other corresponds to a stationary scroll wrap that is stationary. The scissoring members correspond to the end plate of the orbiting scroll member and the end plate of the fixed scroll member. In the machine described above, a scroll member is used in which each pinching member is integrated with a separate engaging member. Further, in the scroll fluid machine disclosed in Japanese Patent Application Laid-Open No. S51-128705, a scroll member in which a spiral wrap as a meshing member and a head plate as a sandwiching member are separately formed, and these are integrated by screwing. Is used.

[0003]

In the above-described method of manufacturing the meshing member, the meshing surfaces of the first and second meshing members are separately processed by cutting using an end mill or the like. In order to avoid a decrease in reliability due to interference at a meshing portion of the meshing surface and a decrease in performance due to a gap, it is necessary to make the shape accuracy of both meshing surfaces extremely high, and the workability is very low.

An object of the present invention is to solve the problems of the prior art and to provide a method for manufacturing a meshing member of a swiveling positive displacement fluid machine with improved performance and reliability. Another object of the present invention is to improve the yield of the material of the meshing member.

[0005]

As a first means for achieving the above object, the movement of the other member viewed from one member does not rotate but turns with a substantially constant turning radius. The first and second meshing members, each having a surface substantially parallel to the direction of the pivot axis that is a direction perpendicular to the first and second meshing members meshing while maintaining or maintaining a small gap between the surfaces, the first meshing member and The second engaging member has a first sandwiching member and a second sandwiching member that are fixedly arranged while maintaining or contacting a small gap with the meshing member from both sides in the pivot axis direction, and the first meshing member is the first meshing member. A first and second meshing portion always forms a substantially closed space during one rotation of the above-described relative pivoting motion with respect to the second meshing member, and an introduction path through which fluid is introduced into the closed space. Having, for pivoting displacement type fluid machine,
In the method of processing the engaging members and their incorporating method,
The material of the first meshing member and the material of the second meshing member are relatively fixedly arranged or integrated, and the second meshing surface is processed simultaneously with the processing of the first meshing surface, and the first meshing that is in correspondence with the offset is performed. The two meshing members were assembled such that the meshing line on the surface and the meshing line on the second meshing surface were at meshing positions.

[0006] The term offset used herein is used in the meaning of graphic conversion as described below. FIG.
The offset of the A plane by α as shown by means that an arbitrary point a on the A plane is perpendicular to the A plane at that point.
Is a transformation that associates a set B formed by associating a point b on the La with a point b away from the point a by a distance α.
Set B is a surface. This α is referred to as the offset amount of this offset. The meshing surface this time is an E surface substantially parallel to one axis H, as shown in FIG. An arbitrary straight line d on the plane D and parallel to the axis H corresponds to a straight line e on the plane E.

[0007] The following two special relations appear between the two surfaces which are substantially parallel to the axis H and have an offset relationship. This will be described with reference to the D plane and the E plane shown in FIG. This D
If the surface is rotated about the radius α without rotating around the axis parallel to the axis H, a meshing state in which the contact portion moves while being in line contact with the surface E is realized. When the straight line on the D surface is d, the straight line on the E surface becomes a straight line e corresponding to the straight line d with this offset. That is,
The meshing line d on the D surface meshes with the corresponding meshing line e on the E surface at an offset. A swiveling positive displacement fluid machine has been realized by utilizing this special relationship.

In processing the first meshing member and the second meshing member, the material is a thin plate coated on both sides with an adhesive having an adhesive effect at a high temperature, and the thin plate is punched with the thin mesh member and the second meshing member. Stamped into the shape of the meshing member. Then, the thin plates having the shape of the first meshing member or the second meshing member are stacked to a predetermined thickness, the adhesion of the stacked thin plates is increased, and the stacked thin plates are kept in a furnace while maintaining the close contact between the thin plates. Then, the temperature inside the furnace was raised between the temperatures at which the adhesive had an adhesive effect, and after the bonding was completed, the laminated thin plates were taken out of the furnace.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a swiveling positive displacement fluid machine according to the present invention will be described with reference to FIGS. 1 is a plan view of a double-toothed meshing member of the present invention, FIG. 2 is a perspective view of the double-toothed meshing member of the present invention, FIG. 5 is a cross-sectional view when a thin plate is punched into the shape of a meshing member, and FIG. FIG. 7 is a perspective view at the time of positioning, FIG. 7 is a sectional view at the time of joining thin plates, and FIG. 8 is an explanatory view of the operation of the meshing member.

First, the structure and operation of a fluid machine incorporating the meshing member will be described with reference to FIGS.
FIG. 1 is a plan view of a double-toothed member. The first engaging member 1 and the second engaging member 2 constitute an engaging member of the swiveling positive displacement fluid machine of the present invention. FIG. 2 is a perspective view of the meshing member of the present invention. The first meshing member 1 is attached to the rotating shaft 5 as shown in FIG. 2 and forms a closed space closed by the fixed second meshing member 2, the first sandwiching member 3, and the second sandwiching member 4. . FIG. 8 shows a meshing state at every 90 ° while the first meshing member 1 makes one rotation with a constant turning radius without rotating inside the fixed second meshing member 2. The white arrow indicates the direction of change in the meshing operation during the compression operation or the pump operation, and the black arrow indicates the direction of change in the meshing state during the expansion operation. First, the case of the compression operation or the pump operation will be described. In this fluid machine, three closed spaces are formed. Since the change in rotation of one closed space shows the same change as the change in rotation of the other closed space except that the phase of rotation is shifted by 120 °, only the closed space 200 indicated by oblique lines will be described below. I do. The outlet path 3c1 of the closed space 200 has a position and a shape that always communicates with the closed space 200. Therefore, when a discharge valve, which is an automatic valve, is attached to the outlet of the outlet path 3c1 to the discharge space, the compression operation is performed by the rotation operation of the meshing member, and the fluid machine becomes a compressor.
Conversely, when no valve is attached to the outlet of the outlet passage 3c1 to the discharge space, a pump operation is performed by the rotation operation of the meshing member, and the fluid machine becomes a pump. here,
Since the closed space 200 is always in communication with the discharge space during the pump operation, it is not optimal to call the space 200 a discharge space, but this name is used for convenience in this case. (C), (d), (a), and (b).
First, in (c), a first meshing portion 201 and a second meshing portion 202 are formed, and a closed space 200 is formed with the sandwiching members 3 and 4 above and below the meshing members 1 and 2. Since the volume of the closed space decreases as the first meshing member 1 rotates as shown in (d), (a), and (b), a compression or pumping action is performed. Here, the suction operation for introducing the fluid into the closed space 200 is performed in a space communicating with the introduction path before one rotation of the compression operation or the pump operation described above. In the case of the closed space 200, the introduction path 4c provided in the second scissoring member 4
Fluid is sucked from 2, 4c1 into the respective suction spaces 203 and 204. Next, the case of the expansion operation will be described. In this case as well, the same can be said for the compression operation or the pump operation, and therefore, of the three closed spaces formed, only the closed space 200 indicated by oblique lines will be described. In this case, the rotation direction of the first meshing member 1 is opposite to the rotation direction during the compression operation or the pump operation described above, and changes to (b), (a), (d), and (c). As a result,
The fluid in the closed space 200 is introduced from 3c1, and (c)
After having been introduced, 4c2 and 4c1 are the lead-out paths.

First, a method of punching a thin plate as a material of the first meshing member and the second meshing member will be described with reference to FIG. First, a thin plate serving as a primary material of the first engaging member and the second engaging member is placed on the die 14. Since the thin plate as the primary material needs to be overlapped and bonded later, a commercially available plate coated with a substance having an adhesive function of melting at 200 to 300 ° C. was used. If another method is used in the overlapping and joining process, it is not necessary to apply a substance having an adhesive function to the surface. In the relationship between the shape and the thickness of the sheared part when performing precision punching, the thickness of the thin plate is broken at the separation surface if the relationship between the width l and the thickness t of the member to be punched does not satisfy l ≧ 2t. Since thinning and burrs are likely to appear, the thickness of the thin plate used this time was set to 1 mm, which is about half the offset amount α, in order to simultaneously take out the materials of the first meshing member and the second meshing member. Then, the thin plate serving as the primary material is fixed to the die 14 by the plate holder 12. The magnitude of the force applied to the plate retainer 12 is 30 to 50% of the shear pressure. The plate retainer 12 is provided around a portion where an annular projection is punched out in order to completely fix a thin plate as a primary material on the die 14 at the time of punching. Then, a shear pressure is applied to the punched portion by the punch 11. When a shear pressure is applied by the punch 11, a reverse pressure is applied by the ejector 13 in a direction opposite to the shear pressure so that the thin plate as the primary material does not move or deform. The magnitude of the back pressure is 5 to 20% of the shear pressure.

Next, a method of stacking the thin plates of the first meshing member and the second meshing member prepared as the primary material will be described with reference to FIG. The accuracy of stacking thin plates as well as the accuracy of punching is also very important for use as a positive displacement fluid machine. The positioning of the thin plates of the first meshing member and the second meshing member is alignment of the two-dimensional plane and the two-dimensional plane, but is realized by matching three or more points of each thin plate in consideration of the front and back of the thin plate. You. First, the first meshing member will be described.
Since the first meshing member always needs the shaft hole 5 processed with high precision, the center of the shaft hole 5 is first used as a point for the first alignment. Further, at least two or more points for alignment are necessary, but since the first meshing member rotates at a high speed of about 1500 rpm, in order to prevent vibration due to the center of gravity of the first meshing member itself being shifted from the center. As shown in FIG. 6, three positioning holes 6 are provided at 120 ° intervals, and the center of the two positioning holes 6 out of the three positions is used as a positioning point. The holes drilled for the alignment may be used for weight reduction, chucking during transportation, and the like. Then, the thin plates for the first meshing member were overlapped to a predetermined thickness by moving the thin plates for the first meshing member, which were sequentially stacked from the bottom, so that the three points were matched. Next, the second meshing member will be described. Since the second meshing member does not rotate, there is no need to consider the balance of weight unlike the first meshing member. The second meshing member has screw holes for fixing the upper and lower lids, and for fixing it to the case of the volumetric fluid machine itself, due to the need to attach the upper and lower lids and the need to fix it to the case of the volumetric fluid machine itself. The center of three or more holes from a screw hole or the like is a point for positioning. The holes drilled for the alignment may be used for weight reduction, chucking during transportation, and the like. Then, the thin plates for the second meshing member were stacked to a predetermined thickness by moving the thin plates for the second meshing member, which were stacked in order from the bottom, so that all points were matched.

A method of joining the thin plates of the first meshing member or the second meshing member thus prepared will be described with reference to FIG. As described above, the sheet surface is 20
Since the substance 27 having an adhesive effect at 0 ° C. to 300 ° C. has been applied, using the fastening jigs 21 and 22 from the upper and lower surfaces of the first meshing member or the second meshing member formed by stacking thin plates. The pressure is evenly applied to increase the adhesiveness between the thin plates, and then a predetermined time until the adhesive effect appears in an atmosphere at 200 to 300 ° C. After a lapse of a predetermined time, the atmosphere is returned to the room temperature atmosphere and cooled until the predetermined time has passed.

Next, a description will be given, with reference to FIG. 9, of a second embodiment in which the same engaging member as the first embodiment is employed. This processing method is similar to that of the first embodiment in that a primary material is prepared by punching a thin plate, and therefore, only the portion where the thin plates are overlapped and the thin plates are joined will be described.

In the second embodiment, an adhesive 25 is applied after the thin plate is punched out, and the alignment is performed in the same manner as in the first embodiment. This is a method of performing bonding with improved adhesion by applying pressure using the tools 21 and 22. This method has an effect that the step of heating can be completely eliminated, and the manufacturing process can be simplified. Further, since the material is not heated at all, there is an effect that deformation of the material due to heat is completely eliminated.

A third embodiment in which the same engaging member as that of the first embodiment is processed will be described with reference to FIG. This processing method is similar to that of the first embodiment in that a primary material is prepared by punching a thin plate, and therefore, only the portion where the thin plates are overlapped and the thin plates are joined will be described.

In the third embodiment, aluminum is used as the material of the thin plate, and when the thin plate is laminated to form a secondary material, the Al-Si brazing material 26 is placed on the thin plate, and A method of placing a thin plate to be used is used. That is,
The Al-Si-based brazing material 26 is completely inserted between the thin plates 1 '. Then, the atmosphere is evacuated while the thin plates 1 'are stacked, and the ambient temperature is raised to a predetermined temperature to perform vacuum brazing. In this example, Al-
Although an example in which a Si-based brazing material is laminated is shown, an Al-
A Si-based brazing material may be pressed at the stage of forming the material. In this example, there is an effect that the joining strength between thin plates can be improved by employing brazing as the joining method. In addition, since aluminum is used as the material, the rotating object can be reduced in weight, and there is an effect that power consumption when operating the positive displacement fluid machine can be reduced.

A fourth embodiment in which the same engaging member as that of the first embodiment is machined will be described with reference to FIG. This processing method is similar to that of the first embodiment in that a primary material is prepared by punching a thin plate, and therefore, only the portion where the thin plates are overlapped and the thin plates are joined will be described.

In the fourth embodiment, as in the third embodiment, aluminum is used as the material of the thin plates, and the thin plates are joined by brazing. Apply antioxidant to all sheet surfaces. Third, similarly to the embodiment, the Al-S
A secondary material is created using a method of placing an i-type brazing material and placing a thin plate to be stacked thereon. That is, the state is such that the Al-Si-based brazing material is entirely contained between the thin plates. Then, the ambient temperature is raised to a predetermined temperature and brazing is performed. However, the difference from the third embodiment is that since the antioxidant is applied to the surface of the thin plate, the atmosphere does not need to be evacuated. In this example, as in the third embodiment, by using brazing for joining thin plates, there is an effect that the joining strength between thin plates can be improved. Also,
Since aluminum is used as the material, the rotating object can be reduced in weight, and there is an effect that power consumption when operating the positive displacement fluid machine can be reduced. Further, since there is no need to evacuate the atmosphere as in the third embodiment, there is an effect that the production time can be reduced.

A fifth embodiment in which the same engaging member as that of the first embodiment is processed will be described with reference to FIG. This processing method is similar to that of the first embodiment in that a primary material is prepared by punching a thin plate, and therefore, only the portion where the thin plates are overlapped and the thin plates are joined will be described.

In the fifth embodiment, a projection welding method is applied to joining thin sheets. First, a plate is used in which conical protrusions having a bottom diameter of about 3 mm and a height of about 2 mm are arranged in a lattice pattern at an interval of about 4 mm only on one side of a thin plate as a primary material. The conical projection can also serve as an annular projection attached to the plate holder when performing punching. Then, positioning is performed in the same manner as in the first embodiment. However, when superimposing, it is necessary to superpose so that the surface with the projection and the surface without the projection face each other. Then, pressure is applied from the upper and lower surfaces of the superposed plates using the pressing jig 31, and the welding power source 3 is applied while the pressure is applied.
A current is passed through the pressing jig 31 by using 3. As in the first embodiment, a predetermined number of sheets can be joined at once by applying pressure and energizing at the same time as in the first embodiment, but the number of sheets to be joined at one time to increase the adhesion between the thin plates is Up to about 10 sheets. In this example, there is an effect that high strength thin plates can be bonded without setting the bonding atmosphere to a high temperature or a vacuum, and further, there is an effect that the thin plates can be bonded at high speed.

A sixth embodiment in which the same engaging member as that of the first embodiment is processed will be described with reference to FIG. This processing method is similar to that of the first embodiment in that a primary material is prepared by punching a thin plate, and therefore, only the portion where the thin plates are overlapped and the thin plates are joined will be described.

In the sixth embodiment, a seam welding method is applied to joining thin plates. The primary material created by punching a thin plate is stacked in the same manner as in the first embodiment, and
After stacking up to about three sheets, the pair of rotary electrodes 34 to which positive and negative pulse voltages generated by the welding power source 35 are applied sandwich the ends of the thin sheets stacked up to about three sheets, and FIGS.
The electrode is moved along the outer periphery of the thin plate as indicated by the locus shown in FIG. By adjusting the moving speed of the electrode and the cycle of the pulse voltage, the adjustment is performed so that a continuous bonding line is obtained. A locally thin portion on the outer periphery of the thin plate is coped with by joining only one line from the thick portion to the thin portion. Approximately three sheets are stacked and joined together in the same manner as in the first embodiment, and joined in the same manner. In this example, there is an effect that a continuous joining line can be stably obtained at a high speed.

A description will be given of a seventh embodiment in which the same engaging member as that of the first embodiment is machined with reference to FIG. In this processing method, the primary material is prepared by punching a thin plate, and the lamination of the thin plates is the same as in the first embodiment. Therefore, only the portion where the thin plates are joined will be described.

In the seventh embodiment, laser welding is applied to joining thin plates. In the first embodiment, the stacked thin plates are pressed from above and below to bring the thin plate 1 'and the thin plate 1' into close contact with each other, and the laser beam 41 is applied along the edge of the thin plate 1 'while being pressed. The joining is performed by applying the thin plates 1 ′ in a direction perpendicular to the engaging surface of the first or second engaging member toward the contact portion between the thin plates 1 ′. The laser beam 41 needs a sufficient laser power so that the penetration depth of the bonding surface is sufficient. After all the joining surfaces are joined, the turning surface is finished using an end mill or the like. In this example, there is an effect that a continuous joining line can be stably obtained at a high speed.

[0026]

According to the present invention, there is an effect that a swiveling positive displacement fluid machine having improved workability and performance and reliability can be realized. Further, by changing the number of thin plates to be overlapped, there is an effect that the point of the swiveling positive displacement fluid machine can be freely changed. When machining oil grooves on the upper and lower surfaces of the first meshing member to improve performance, if a thin plate in which oil grooves are punched into upper and lower thin plates is used, machining after machining the first meshing member is omitted. There is an effect that can be done.

[Brief description of the drawings]

FIG. 1 is a plan view of a meshing member manufactured in a first embodiment at the time of finishing processing.

FIG. 2 is an explanatory view of assembling the engaging member manufactured in the first embodiment into a fluid machine.

FIG. 3 is an explanatory diagram of a general offset.

FIG. 4 is an explanatory diagram of offset of a plane parallel to one axis.

FIG. 5 is an explanatory diagram of a punching method according to the first embodiment.

FIG. 6 is an explanatory diagram of a positioning method according to the first embodiment.

FIG. 7 is an explanatory diagram of a method for joining thin plates according to the first embodiment.

FIG. 8 is an explanatory diagram of the operation of the meshing member manufactured in the first embodiment.

FIG. 9 is an explanatory view of a method of joining thin plates according to the second embodiment.

FIG. 10 is an explanatory diagram of a joining method according to a third embodiment and a fourth embodiment.

FIG. 11 is an illustration of a method of joining thin plates according to a fifth embodiment.

FIG. 12 is an explanatory view of a method of joining thin plates according to a sixth embodiment.

FIG. 13 is an explanatory diagram of a joining position of a thin plate according to the sixth embodiment.

FIG. 14 is an explanatory diagram of a joining position of a thin plate according to the sixth embodiment.

FIG. 15 is an explanatory diagram of a method of joining thin plates according to a seventh embodiment.

[Explanation of symbols]

1... First meshing member, 2... Second meshing member, 1
.., 2c... meshing surface, 1 ′... first meshing member material, 2 ′... second meshing member material, 3. 2nd scissoring member, 11 ... punch, 12 ... plate retainer, 13 ... ejector, 21 ... upper fastening jig, 22 ... lower fastening jig, 23 ...
・ Male screw for tightening, 24 ・ ・ ・ Female screw for tightening,
25 ... adhesive, 26 ... brazing material, 31 ... press, 3
2 percussion welding switch, 33 percussion welding power supply, 34 rotating electrode, 35
Welding power supply for seam welding, 41 ... laser beam, 42 ...
Welding torch for laser welding.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Isamu Tsubono 502, Kandachi-cho, Tsuchiura-shi, Ibaraki Pref.

Claims (1)

[Claims] 1. The movement of the other member as viewed from one member does not rotate but turns with a substantially constant turning radius, and each of the surfaces substantially parallel to the turning axis direction perpendicular to the turning movement plane. First and second meshing members having their surfaces meshing while keeping a gap or in contact with each other,
The first meshing member and the second meshing member have a first scissoring member and a second scissoring member which are disposed at positions where the first meshing member and the second meshing member are sandwiched while keeping a gap or in contact with or fixed from both sides in the pivot axis direction. A part other than at least one first meshing part and at least one first meshing part which always moves or stays stationary while the first meshing member makes one rotation relative to the second meshing member, A meshing surface having a shape that forms a substantially closed occluded space having a second meshing portion, having an introduction path through which fluid is introduced into the occluded space and an outgoing path through which fluid is derived from the occluded space. In a method of manufacturing a meshing member of a swiveling positive displacement fluid machine, the material of the first meshing member and the second meshing member are formed as a single plate, and the first meshing surface is processed together with the first meshing surface. The second meshing surface is simultaneously processed at a position where the meshing surface is roughly offset by the distance of the turning radius, and the meshing line on the first meshing surface and the meshing line on the second meshing surface that are in a corresponding relationship at the offset. A method of processing a meshing member of a swiveling positive displacement fluid machine, wherein the meshing member is incorporated so that the meshing line is at a meshing position.