JP4793087B2 - Compressor manufacturing method - Google Patents

Description

  The present invention relates to a compressor that can be preferably used in, for example, a refrigeration apparatus, an air conditioner, a hot water supply apparatus, and the like, and a method for manufacturing the compressor.

  As a conventional compressor, there is a method in which a hole is drilled in a container, a compression mechanism part that is a compression means is shrink-fitted into the container, molten metal is poured from the outside of the hole part, and internal parts such as the compression mechanism part are fixed to the container. is there. (For example, see Patent Document 1)

  As a method of fixing the compression mechanism part of the compressor that does not drill holes in the container, after the compression mechanism part of the built-in part is pressed into the container and positioned, the container facing the pilot hole provided on the outer peripheral surface of the compression mechanism part is There is one in which the pressing mechanism is pressed inward in the radial direction, the container is plastically deformed inside the pilot hole, and the compression mechanism is fixed in the container. (For example, see Patent Document 2)

  Further, there is a type in which a pilot hole is provided on the outer peripheral surface of the compression mechanism portion, and the compression mechanism portion is fixed to the sealed container by heating caulking from the outer periphery of the container at the same position as the pilot hole. (For example, see Patent Document 3)

  Also, a plurality of pilot holes close to the outer peripheral surface of the compression mechanism section are provided, and a container facing the pilot holes is pressed inward in the radial direction by a pressing jig, and a convex portion that engages the pilot hole is formed in the container. In some cases, a plurality of convex portions of the container fasten between the pilot holes of the compression mechanism portion by heat shrinkage due to cooling of the container, and the compression mechanism portion of the built-in component is fixed to the container. (For example, see Patent Document 4)

Japanese Patent Laid-Open No. 06-272677 (second page, FIG. 1) JP-T-6-509408 (1st page, FIG. 1) Japanese Utility Model Publication No. 1-1131880 (first page, FIG. 1) Japanese Patent Laying-Open No. 2005-330827 (first page, FIG. 1)

  The prior art as described above has the following problems. In the case of drilling a container, foreign matter such as welding spatter enters from the hole during welding, and the foreign matter enters the compression mechanism that is the compression means, resulting in poor compression or refrigerant from the container hole due to poor welding. There was a problem that a leak occurred. In addition, when the molten metal is poured into the hole of the container, the molten metal injected between the built-in components such as the compression mechanism and the container is solidified while the container is heated and the container expands radially outward due to the heat. Therefore, after the molten metal is solidified, the container is cooled and contracted, whereby the solidified molten metal receives a force inward from the container, and presses the compression mechanism portion in the radial direction to compress the compression mechanism. There is a problem that the distortion generated in the portion increases.

  If the container is not punched, the compression mechanism is pressed into the container, which increases the tightening force of the compression mechanism and causes distortion in the compression mechanism. When the container facing the hole is pressed from outside without being heated and caulked, a force is applied to the compression mechanism part, and there is a problem that distortion of the compression mechanism part increases. In addition, the caulking force from the outside of the container during caulking can be reduced by caulking the pilot hole at one point, but the compression mechanism part rattles against the container due to thermal contraction of the caulking point after the container cools. There was a problem of doing.

Even when multiple caulking points are formed by heat caulking and tightened and fixed by heat shrinkage due to cooling of the container, the tightening is not sufficient, and the Therefore, there has been a problem in that long-term reliability is lacking, such as the occurrence of misalignment and rattling of the compression mechanism, and problems such as increased noise and vibration.

  The present invention has been made to solve the above-mentioned problems of the prior art, and there is no possibility of foreign matter such as welding spatter mixing in or leakage of refrigerant, and the compression mechanism portion of the built-in component is fixed to the container. This reduces the force received by the compression mechanism to reduce the occurrence of distortion in the compression mechanism, and even for long-term use, there are problems such as increased noise and vibration due to rattling of the compression mechanism. A highly reliable and high-performance compressor that does not occur is obtained.

Manufacturing method of engaging Ru compressor to the invention, a plurality of lower holes on the outer peripheral side of the internal part products such as compression mechanism Ru are located close to one another is provided, the built-in component into the container through the gap a step of receiving, while pressurized heat in a temperature range below the temperature or more and the melting point of softening of the plurality of suppressing the heating range in a position facing the lower hole from the outside of the container of the container material, the prepared hole The step of pressing the container wall part with a pressing jig having an inner diameter or less to enter the container wall part into the pilot hole, and the container wall part inserted into the plurality of pilot holes arranged at a plurality of locations in the circumferential direction A step of sandwiching a built-in component and fixing the built-in component to the container, and a force for sandwiching the built-in component and fixing the container to the container is formed between the center between the pilot holes and the center of the pilot hole arranged close to each other. Distance between and heating to heat the container And it adjusts at least one of the amount.

According to this inventions, reliably to form the container protrusions, by generating a sufficient scissors included force between the prepared hole of the internal components in a plurality of containers protrusions proximate, ensuring the internal parts in the container Can withstand normal and excessive force generated during compressor operation, and increase noise and vibration due to rattling of internal components Therefore, it is possible to obtain a highly reliable compressor that does not cause the above problem. In addition, since the force received by the compression mechanism portion which is a built-in component can be reduced and distortion of the compression mechanism portion can be reduced, the performance of the compressor can also be improved.

Embodiment 1 FIG.
1 is a longitudinal sectional view schematically showing a hermetic compressor according to Embodiment 1 of the present invention. In FIG. 1, 1 is a sealed container, 101 is a compression mechanism part which is a kind of built-in component built in the sealed container 1, and forms a compression means which is housed in the container 1 and covers the periphery of the compression chamber to perform compression. is there. Reference numeral 103 denotes a suction pipe for supplying gas to be compressed to the compression mechanism unit, 2 denotes a stator of an electric motor that supplies driving force to the compression mechanism unit 101, and 3 denotes a rotor of the electric motor. The stator 2 is fixed to the sealed container 1 by shrink fitting.

  Here, a method for fixing the compression mechanism 101 to the sealed container 1 will be described. The compression mechanism unit 101 is in a state of being fitted to the sealed container 1 with a gap. Here, the gap fitting means that the outer diameter of the compression mechanism portion 101 is smaller than the inner diameter of the sealed container 1, and a load is applied to the compression mechanism portion 101 from the sealed container 1 when it is arranged even if the roundness of each other is taken into consideration. It means not fitting. In this case, the outer diameter and the inner diameter often mean the average values of the outer diameter and the inner diameter measured at two orthogonal points or at three or more additional points. A pilot hole 102 is formed on the outer peripheral surface of the compression mechanism 101. FIG. 1 is a longitudinal sectional view, and only one pilot hole 102 is drawn. However, as shown in FIG. 2, the pilot hole 102 is adjacent to the compression mechanism 101 in the circumferential direction. A set of points is provided, and here, a partial region of the outer peripheral surface of the compression mechanism portion 101 that combines a plurality of prepared holes 102 and a portion sandwiched by the prepared holes 102 is called a fixed portion. And This fixing portion is provided at three locations on the outer peripheral surface of the compression mechanism portion 101 at substantially equal pitch intervals. In this case, the total number of the pilot holes 102 is six.

  Then, as shown in FIG. 2, the outer peripheral surface of the sealed container 1 on the center position between the two pilot holes 102 of each fixed part is the heating center 109, and the wall of the sealed container 1 facing each fixed part is the sealed container 1. Heat locally from outside. After thermally expanding the sealed container 1 by heating, as shown in FIG. 3, the tip is flat with a cylindrical shape having an outer diameter equal to or slightly smaller than the inner diameter of the lower hole 102 from directly above the two lower holes 102. Two protruding jigs 111 are pressed simultaneously from the outside of the wall portion of the sealed container 1 at two points, and as shown in FIG. 4, two convex portions (container convex portions) that enter the pilot hole 102 inside the wall portion of the sealed container 1. 107 is formed, and two caulking points are formed. Hereinafter, a plurality of adjacent caulking points (here, 2 points) will be referred to as caulking portions. The caulking portions are formed by pressing almost simultaneously at three locations on the outer peripheral surface of the compression mechanism portion.

  As shown in FIG. 5, when the thermally expanded sealed container 1 is cooled, the two convex portions 107 are drawn toward the heating center 109 due to the thermal contraction, and thus the two convex portions 107 cause the compression mechanism portion 101 to move. In the fixed portion of this form, a set of two adjacent pilot holes 102 are provided side by side in the circumferential direction of the outer peripheral surface of the compression mechanism 101, so that the compression mechanism 101 is tightened in the circumferential direction. It is fixed to the sealed container 1. Unlike the conventional fixing method by welding or press fitting, the compression mechanism is not fixed by a radial force, but is clamped and fixed by a circumferential force, so that the distortion applied to the compressor mechanism 101 is small. In addition, since the airtight container 1 is not drilled, there is no fear of foreign matters such as spatters or refrigerant leakage.

  In FIG. 4, 106 is a concave portion of the sealed container 1 that forms the convex portion 107, and the inner diameter thereof is equal to the outer diameter of the pressing jig 111. FIG. 6 is an arrow view seen from the direction A shown in FIG. 5 and is a view of the sealed container 1 seen from the outside. Two close recesses 106 are formed on the outer peripheral surface of the sealed container 1 and provided at three locations on the entire periphery. In FIG. 6, a dotted circle indicated by 108 represents a heating range, and is a range in which heat by local heating has an influence. Further, the heating center 109 is represented by an imaginary line by a one-dot chain line.

  The material of the sealed container 1 is generally iron. The yield point of iron suddenly decreases from around 600 ° C. The temperature at which the yield point starts to drop rapidly in this way is referred to as the softening temperature. That is, the temperature at which iron softens is 600 ° C. Decreasing the rigidity of the sealed container 1 and reducing the pushing force to form the convex portion 107 by pressing the pressing jig 111, and further lowering the yield point of the material of the sealed container 1 and efficiently transforming into a predetermined shape Therefore, the heating temperature is preferably higher than the temperature at which the material softens and lower than the melting point. By lowering the yield point by heating, the spring back in the radial direction of the hermetic container 1 after the hermetic container 1 is plastically deformed (in this case, the convex part 107 is formed) (return of the convex part 107 in this case) is performed. The predetermined push-in amount can be ensured efficiently and reliably. Here, the push-in amount is the depth of the convex portion 107 that enters the pilot hole 102, and is a dimension indicated by H in FIG. As described above, the material of the sealed container 1 is iron, and the softening temperature is 600 ° C. The melting point of iron is about 1560 ° C. Therefore, the heating temperature for local heating is preferably 600 ° C. or higher and 1500 ° C. or lower. Of course, if the material is other than iron, the heating temperature changes, and the temperature is above the softening temperature of the material and below the melting point.

  Since the heating range 108 includes all of the concave portions 106 that serve as pressing portions of the pressing jig 111, it is possible to reliably form the convex portions 107 by using the characteristics of the material of the sealed container 1 at a high temperature as described above. The pushing force for forming the convex portion 107 is reduced, and distortion generated in the compression mechanism portion 101 during assembly can be reduced. Further, by setting the heating center 109 of the sealed container 1 above the center of the two pilot holes 102, the convex part 107 is reliably formed on the sealed container 1, and then the convex part 107 is heated toward the heating center by cooling. Since it contracts, the space between the prepared holes 102 of the compression mechanism 101 can be firmly sandwiched between the two closed container convex portions 107.

  In this way, the convex portion 107 of the sealed container 1 is securely formed, and the compression mechanism portion 101 is fixed between the pilot holes 102 of the compression mechanism portion 101 by firmly sandwiching the convex portion 107 of the sealed container 1. Even if it is a clearance fit with the hermetic container 1, it can withstand normal and excessive force generated during the operation of the compressor for a long-term use of the compressor, and does not generate rattling. The compression mechanism 101 can be fixed to the closed container 1. By fitting the gap, it is possible to eliminate the force of pressing in the radial direction against the compression mechanism 101 that has been acting in the conventional welding or press-fitting after the fixing is completed, so that the distortion of the compression mechanism 101 can be reduced, and the compressor Can also improve the performance.

  In the axial direction of the compressor, the compression mechanism unit 101 is supported not only by the support of the closed container convex portion 107 by being sandwiched but also by the rigidity of the closed container convex portion 107 itself. Therefore, the pilot hole 102 diameter dimension φD1 of the compression mechanism portion 101 shown in FIG. 7 is selected so as to satisfy the specification of the pull-out strength against the transportation and dropping of the compressor in which the axial acceleration occurs.

For example, assuming that the required pull-out strength is 1500 kgf, when there are six caulking points in total in the circumferential direction with three caulking portions composed of two caulking points that are close as in the above embodiment, if the breaking strength of the closed container 1 and 24kgf / mm ^2, the φ3mm the prepared hole 102 diameter .phi.D1, the pull-out strength ^{is, π × 3 2/4 ×} 24 × 6 points = 1018Kgf next, the pull-out strength required specifications I'm not satisfied. If this with ^{φD1 = φ4mm, π × 4 2} /4 × 24 × 6 points = 1810Kgf next, so the pull-out strength specifications fully satisfactory. Thus, the diameter φD1 of the pilot hole 102 that satisfies the pull-out strength specification is set according to the number of the caulking points.

  Up to now, the case where the two pilot holes 102 adjacent as the fixed part are arranged in the circumferential direction of the outer peripheral surface of the compression mechanism part 101 has been described, but the arrangement direction is not limited to the circumferential direction only. Even if it is in the direction of the axial line of the compression mechanism 101 that is orthogonal to the compression mechanism portion 101, it can generate a pinching force between the pilot holes 102 in any direction different from those directions, thus increasing the distortion. The compression mechanism unit 101 can be firmly fixed without causing it. However, as described above, the strength against slipping increases as the number of convex portions 107 receiving a load in the axial direction increases, so it is preferable that the two pilot holes 102 are arranged in the circumferential direction. More specifically, in the case where a total of 6 caulking points are provided in 3 places around the entire circumference of the caulking part, which is composed of 2 caulking points provided close to each other in the circumferential direction, the axial direction generated during transportation, etc. However, if there are three caulking parts that consist of two caulking points that are close to each other in the axial direction, the number of caulking points is six. Since the two caulking points overlap in the axial direction at the caulking part, the force in the axial direction is substantially supported at one point by one caulking part and at three points by combining the three caulking parts. For this purpose, the diameter φD1 of the pilot hole 102 must be made larger than when arranged in the circumferential direction to satisfy the pull-out strength specification.

  Moreover, the number of the pilot holes 102 which adjoin as a fixing | fixed part of the compression mechanism part 101 outer peripheral surface is not limited to two points. As long as the fixing portion has a plurality of two or more prepared holes, the prepared holes 102 can be sandwiched. Regardless of the number of points, if the hermetic container 1 on the center between the prepared pilot holes 102 is used as the heating center, the convex portions formed at the plurality of points are cooled and contracted toward the heating center. All of the projected portions 107 can be inserted between the pilot holes 102. When the compressor is viewed from the outside in the radial direction of the hermetic container 1, when the caulking points that are close to each other are three, the three caulking points indicated by the recesses 106 are arranged in a triangle as shown in FIG. The heating range 108 may be formed so as to include the entire three points with the center of heating. Furthermore, when the caulking points that are close to each other are set to four points, the four caulking points indicated by the recesses 106 may be arranged in a quadrangular shape as shown in FIG. The direction of the arrangement of the plurality of points may be any direction as in the case of the two points described above, but there are many convex portions that receive a load in the axial direction from the point of drop strength. Is preferable. For example, in a caulking part consisting of 3 points, it is better to arrange 2 points vertically below (or above) as shown in FIG. 8, and in the case of a caulking part consisting of 4 points, it is arranged in a rhombus as shown in FIG. In this case, the number of support points (convex portions) with respect to the axial force can be increased as compared with the arrangement of FIG.

  In order to satisfy the required removal strength specifications, the number of caulking points at one caulking portion may be increased, or the number of caulking portions provided on the entire circumference may be increased. In the above-described embodiment, three caulking portions having two caulking points adjacent to each other are provided on the entire circumference. However, if the compressor is larger, three points having a triangular arrangement as shown in FIG. Four caulking portions composed of caulking points may be formed on the entire circumference, and a total of 12 caulking points may be provided.

  In order not to cause unnecessary thermal distortion in the sealed container 1 and to improve the tact time of the assembling apparatus, local heating before caulking is preferably performed in a short time, and the heating source can be used in a short time. What can raise the temperature of this to the required temperature is good. As a heat source, arc welding with a TIG welding machine or the like, thermal power with a burner, laser, high frequency heating, or the like can be used. An arc welding machine such as a TIG welding machine has the advantage that the equipment cost is low and the hermetic container 1 can be locally heated by an arc. However, when the center of heating becomes too high, the sealed container 1 is in a semi-molten state, and when the semi-molten portion is pressed by the pressing jig 111, blow holes are easily generated. Although the high-frequency heater has high equipment costs, it has good heating stability and controllability, and can be stably and locally heated in a short time by adjusting the coil shape and power supply capacity. It can be said that it is extremely suitable as a heating source. Although the heating cost of a burner or the like is low in equipment cost, it is difficult to heat locally, so a wide range is heated when the heating range 108 is wide, such as when the diameter φD1 of the pilot holes 102 is large or the gap between the pilot holes 102 is wide. It is effective to use sometimes.

  In the present embodiment, the compression mechanism 101 is fitted into the closed container 1 with a gap, and a gap is provided between the closed container 1 and the compression mechanism 101 in the radial direction. The structure is difficult to transmit heat. However, if the heating time is long, heat may be conducted to the compression mechanism portion 101 which is a built-in component when the sealed container 1 is heated. When the heat is conducted to the compression mechanism portion 101 and becomes high temperature, the sealing after the convex portion 107 is formed. Since the container 1 is thermally shrunk by cooling, and not only the sealed container 1 but also the compression mechanism 101 is thermally shrunk by cooling, the pinching force of the sealed container convex part 107 is reduced and rattling occurs. There is no doubt. Therefore, heating needs to be performed in a short time. What is necessary is just to determine the power supply capacity | capacitance of a high frequency heater so that it may raise to predetermined temperature in a short time. For example, the thickness of the sealed container 1 is 2 mm, the heating temperature is 800 to 1100 ° C., the heating range 108 is φ12 mm, the device tact time for completing the caulking of this embodiment is 12 seconds, and only 3 seconds is given to the heating process. In this case, by setting the power source capacity to about 10 kW per caulking portion, the above-mentioned time tact can be satisfied, and fixing can be performed without causing a decrease in the pinching force due to the transfer of heat to the compression mechanism portion 101. As the heating time, for example, when the plate thickness of the sealed container 1 is 2 mm to 4 mm, 3 to 4 seconds when it is desired to set the temperature to 800 to 1100 ° C., and 1 to 2 seconds when the higher temperature is 1100 ° C. to 1500 ° C. When the temperature can only be set to 600 ° C. to 800 ° C. due to the above relationship, 5 to 6 seconds is appropriate, and the reliable formation of the convex portion 107 and the fixing with sufficient and stable pinching force can be achieved.

  As shown in FIG. 7, when the inner diameter of the recess 106 is φD, this φD is equal to the outer diameter of the pressing jig 111. The inner diameter of the recess 106 (= the outer diameter of the pressing jig 111) φD is equal to or smaller than the diameter 102D of the pilot hole 102, so that the hermetic container 1 is pushed out into the pilot hole 102 at the time of pressing and sealed with a small pressing force. The convex part 107 can be formed by plastically deforming the container 1. If the outer diameter φD of the pressing jig 111 is larger than the diameter 102 of the lower hole 102, the pressing jig 111 also presses the outer peripheral surface of the compression mechanism 101 around the lower hole 102 during pressing. The pressing force required to plastically deform 1 to form the convex portion 107 increases. As a result, the compression mechanism 101 is distorted and the performance of the compressor is degraded.

  On the other hand, if φD, which is the outer diameter of the pressing jig 111, is too smaller than the diameter 102D of the pilot hole 102, the correctly shaped sealed container convex portion 107 cannot be formed. The supporting point for the pressing force of the compression mechanism 101 is the opening edge (φD1) of the pilot hole 102. On the other hand, if φD is too small, the outer peripheral side becomes a convex portion having a nearly spherical shape. The contact portion between the container convex portion 107 and the inner periphery of the compression mechanism portion pilot hole 102 is reduced. As a result, sufficient pinching force cannot be obtained, and rattling of the compression mechanism 101 with respect to the sealed container 1 occurs during long-term use. Attempting noise / vibration tests of several compressors with fixed φD1 and varying φD, and arranging the results, when φD / φD1 is less than 0.5 The problem becomes more prominent. Therefore, the dimension of the prepared hole 102 diameter φD1 and the pressing jig 111 outer diameter (recess 106 inner diameter) φD needs to satisfy the relationship of 1 ≧ D / D1> 0.5. By satisfying this relationship, the convex portion 107 of the sealed container 1 is reliably formed, and withstands normal and excessive force generated during the operation of the compressor and rattling against long-term use of the compressor. The firm compression mechanism 101 is fixed to the closed container 1 without any occurrence.

    FIG. 10 is a simplified diagram showing a caulking punch for forming the convex portion 107 in the sealed container 1. FIG. 11 is a cross-sectional view of an essential part for explaining the caulking portion shown in FIG. FIG. 12 is a simplified diagram showing an apparatus for forming a caulking portion. FIG. 13 is a cross-sectional view of a cylinder portion for explaining phases of a plurality of caulking portions. FIG. 14 is a graph showing changes in the cylinder vane groove width due to changes in the phase of the caulking portion. FIG. 15 is a cross-sectional view for explaining the pilot hole machining with reference to the suction hole of the cylinder. As shown in FIG. 10, the pressing jig 111 has a flat tip, and the sealed container 1 is sandwiched between the corner of the tip surface and the outer edge corner of the opening 102 of the compression mechanism portion 101. Since 1 is plastically deformed, the convex portion 107 can be formed with a small pressing force, and therefore, the occurrence of distortion in the compression mechanism portion 101 can be reduced.

  Since it is necessary to simultaneously press against a plurality of caulking points of one caulking portion, it is preferable to use a plurality of pressing jigs 111 fixed to the same base portion. For example, when two adjacent points are caulked at the same time, two caulking points 111 are formed simultaneously by fixing two pressing jigs 111 to one base 110 as shown in FIG. be able to. If the number of prepared holes is three, three crimping jigs 111 are fixed to one base 110, so that three crimping points can be formed simultaneously by one pressing. The whole of the base 110 provided with the pressing jig 111 is called a caulking punch. Furthermore, the caulking punch can be fixed to the base 110 with a bolt or the like, and can be attached and detached so that only the jig 111 can be replaced, thereby reducing the maintenance cost of the caulking punch. The material of the pressing jig 111 is a hot forging tool steel, a cold forging tool steel, or a heat resistant material such as ceramic, so that wear deterioration at the tip corner of the pressing jig 111 can be suppressed, and caulking. The maintainability of the punch can be improved.

  In the present invention, due to the heat shrinkage of the sealed container 1, a pinching force by the container convex portion 107 is generated between the plurality of prepared holes 102 adjacent to the fixing portion to fix the compression mechanism portion 101 which is a built-in component. By adjusting the interval between the pilot holes 102, the amount of heat shrinkage of the sealed container 1 can be changed, and the pinching force generated between the plurality of pilot holes 102 of the built-in component can be adjusted. When the interval between the plurality of pilot holes 102 in the fixing portion is wide, the amount of heat shrinkage after simultaneous caulking at a plurality of points is increased, and the pinching force of the closed container convex portion 107 is increased. The holding force for fixing 101 can be increased. However, since the heating range 108 needs to be widened, thermal distortion occurs in the sealed container 1 and the roundness of the inner diameter deteriorates, and the compression mechanism part 101 is partially pressed except at the caulking point, so that the compression mechanism part 101 is distorted, and the compressor performance is reduced.

  On the other hand, when the interval between the plurality of pilot holes 102 adjacent to the fixing portion is narrow, the heating range 108 can be reduced, and thus the distortion of the compression mechanism 101 due to the thermal distortion of the sealed container 1 can be prevented. The pinching force is reduced. As shown in FIG. 11, the shortest distance from the heating center 109 to the center of the pilot hole 102 is represented by P. Here, the heating center 109 indicates the center between a plurality of prepared holes 102 arranged close to each other. As for the allowable upper limit of P, assuming that the diameter of the pilot hole 102 is represented by φD1 as described above, the heating range 108 is expanded so that P / D1 exceeds 2 from the measurement result of the inner diameter roundness of the sealed container 1 before and after heating. As a result, the change in roundness increases. As for the allowable lower limit of P, there are 3 or 4 caulking parts in the circumferential direction at approximately equal pitches. For specifications with 2 to 4 caulking points in one caulking part, the noise and vibration test results are used. 0.6 ≦ P / D1 and no problem of noise and vibration due to rattling occurred. Therefore, it is preferable to set the interval between the adjacent pilot holes 102 so as to satisfy 0.6 ≦ P / D1 <2. By satisfying this relationship, the long-term use of the compressor can withstand the normal and excessive force generated during the operation of the compressor, and the strong compression mechanism unit 101 that does not generate rattling. Fixation to the sealed container 1 is obtained. Even if the interval between the plurality of pilot holes 102 is constant, the amount of heat shrinkage of the sealed container 1 is changed by adjusting the power supply capacity for heating, which is a heating capacity, so Can be adjusted.

The pushing amount H, which is the depth at which the airtight container convex portion 107 shown in FIG. 4 enters the pilot hole 102, acts on the inside of the airtight container 1 during the operation of the compressor, and the internal pressure causes the airtight container 1 to have a radius. A minimum amount that prevents the airtight container convex portion 107 from coming out of the pilot hole 102 when spreading outward in the direction is required. For example, when an internal pressure of 42 kgf / cm ² acts on a sealed container having a plate thickness of 2 mm and an inner diameter of 100 mm, the sealed container expands about 20 μm on one side radially outward. Therefore, the pushing amount H must be at least 20 μm. However, if the push-in amount H is too small, the Hertz stress due to the pinching force acting on the convex portion 107 becomes large, so it is better to secure 0.1 mm or more.

  As the push-in amount H is increased, the thickness of the minimum thickness portion of the sealed container 1 is decreased. Here, the thickness of the minimum thickness portion refers to the distance between the outer peripheral root of the convex portion 107 (inner peripheral surface of the sealed container 1) formed on the wall portion of the sealed container 1 and the inner peripheral bottom surface base between the concave portions 106. , The dimension indicated by K in FIG. The dimension G shown in FIG. 5 is the depth of the sealed container recess 106, and the push-in amount H increases as the depth of the recess 106 increases. The depth G of the recess 106 is basically equal to the protruding length of the sealed container projection 107 from the inner peripheral surface of the container. The thickness K of the minimum thickness portion is determined by the depth G of the recess 106. In order to secure the pushing amount H, the concave portion 106 is necessarily formed, and the thickness K of the minimum thickness portion is substantially smaller than the plate thickness of the sealed container 1 by the depth G of the concave portion 106. When the depth G of the concave portion 106 is increased in order to increase the pushing amount H, the thickness K of the minimum thickness portion of the hermetic container 1 becomes thin, and when the internal pressure acts on the hermetic compressor, the minimum There is a fear that leakage will occur from the thick part. Therefore, the maximum allowable recess 106 depth G is determined from the pressure resistance required for the sealed container within a range that can satisfy it, but the thickness K of the minimum thickness portion is 0.5 of the plate thickness of the sealed container 1. If it is twice or more, usually, the pressure resistance of the sealed container can be sufficiently satisfied. For example, if the plate thickness of the sealed container is 2 mm, the depth G of the recess 106 may be set to 1 mm or less. Thus, the depth G of the recess 106 may be set to 0.5 times or less the plate thickness of the sealed container 1. Therefore, the pushing amount H is also 0.5 times or less the plate thickness of the sealed container 1.

  However, in a hermetic compressor used in a cycle that uses carbon dioxide as a refrigerant that has recently been found in the market by being used in hot water heaters and the like, carbon dioxide is a very high pressure refrigerant. Some containers have a thick plate thickness of 6 mm or 8 mm. Even in such a closed container having a large plate thickness, the depth G of the recess 106 may be allowed up to 0.5 times the plate thickness, but in order to make the depth G of the recess 106 3 mm or 4 mm, Since a pressing force is required and there is a concern about the problem of distortion of the compression mechanism due to pressing, even a hermetic compressor used for a very high pressure refrigerant such as carbon dioxide, as an actual product, It is sufficient to secure a pushing amount of 0.5 times or less of the plate thickness of the sealed container 1 or about 1 mm.

  In the present embodiment, the caulking portions are formed at three locations on the outer periphery of the compression mechanism portion 101, but it is desirable that the three locations be arranged at an equal pitch of 120 °. FIG. 12 is a schematic view schematically showing an apparatus and a state for forming a caulking portion. A pressing press 112 has a caulking punch at its tip, and a pressing jig 111 is a portion that directly contacts the sealed container 1 and plastically deforms the sealed container 1. Since the caulking part is formed at three places (two caulking points are formed at one place, the total number of caulking points is 6), three pressing press machines 112 are installed. An arrow indicated by 113 represents the pressing force that the pressing jig 111 applies to the sealed container in the pressing press 112, and the pressing force 113 acts toward the center of the sealed container 1. The magnitudes of the three pressing forces 113 are equal.

  Since three pressing press machines 112 are arranged at an equal pitch of 120 °, and the three caulking portions are arranged at an equal pitch of 120 °, and the three pressing forces are pressed simultaneously, the three pressing forces 113 can be balanced. Even if a separate jig for receiving the pressing force 113 is not provided, the sealed container 1 does not move or rotate due to a moment. Therefore, the apparatus for forming the caulking portion can be simplified. When the four caulking portions are formed on the outer periphery of the compression mechanism portion 101, the pitch may be 90 °. According to the number of caulking part formation places on the entire circumference, the pressing force can be balanced by arranging the pitches between the caulking parts to be equal pitches, and thus the apparatus for forming the caulking part can be simplified. Simplification is possible. Actually, the pitch of each caulking portion may not be exactly equal due to variations in equipment and products, but as a basic design and manufacture is aimed at equal pitch. In addition, an equal pitch is most desirable, but even if there is a slight difference in each pitch, the pressing force acts on the surface by the plane of the tip of the pressing jig 111, so the sealed container 1 does not move or rotate. If so, there is no problem and the same effect can be obtained.

  When the hermetic compressor is a rotary compressor, a pilot hole is formed on the outer peripheral surface of the cylinder, which is a part forming the outer peripheral wall of the compression chamber, among the plurality of parts forming the compression mechanism portion, and Caulking may be performed between the outer periphery and the sealed container. FIG. 13 is an explanatory diagram for explaining the phase of the caulking portion with respect to the cylinder. In FIG. 13, reference numeral 16 denotes a cylinder which is one of the components constituting the compression means. The cylinder has an inner diameter 16a that forms a compression chamber, a vane groove 16b that is open to one of the inner diameters 16a, and three fixing portions. An outer peripheral surface 16c. Although not shown, a cylindrical rolling piston that is eccentric with respect to the inner diameter 16a rotates within the inner diameter 16a, a plate-shaped vane is fitted in the vane groove 16b, and the tip of the vane is always in contact with the outer peripheral surface of the rolling piston. Thus, a compression chamber is formed. The angle indicated by θ in FIG. 13 is the first caulking portion existing in the vicinity of the vane groove 16b with the center line of the vane groove 16b as the base point when the three caulking portions are arranged at an equal pitch of 120 °. The angle indicates the phase of the position 114a, and the clockwise direction is positive in the figure. Therefore, with the center line of the vane groove 16b as the base point, the phase of the second caulking portion position 114b is θ + 120 °, and the phase of the third caulking portion position 114c is θ + 240 °. The first place, the second place, and the third place are described for convenience of explanation, and the three places are pressed almost simultaneously.

  In the present invention, the distortion generated in the compression mechanism is reduced as compared with the conventional method such as caulking with welding or press fitting. difficult. FIG. 14 is a diagram showing the amount of change (strain amount) in the width dimension of the vane groove 16b when the phase θ of the first caulking portion position 114a is changed. The amount of distortion with respect to the change in the phase θ at the first location, and the caulking portion is formed not only at one location, but at three locations at substantially equal pitches. The left end is θ = 0 °. At this time, the phase of the first 114a is directly above the center line of the vane groove 16b, and the second 114b is clockwise in FIG. 13 from the vane groove 16b (θ The third portion 114c has a phase of 120 ° counterclockwise (in the negative direction of θ) in FIG. 13 with the vane groove 16b as a base point. The right end of FIG. 14 is when θ = 120 °. In this case, the phase of the third 114c is directly above the center line of the vane groove 16b, which is substantially the same as when θ = 0 °. It is.

  As shown in FIG. 14, when the first caulking position 114a is on the center line of the vane groove 16b, that is, when θ = 0 ° (θ = 120 ° is substantially the same), the amount of change in the vane groove width is the largest. Is small. The vane groove width here is an average value of the groove widths of a total of four points on two diagonals, and the amount of change is the groove width after forming the caulking portion from the groove width before forming the caulking portion. Dimensional change to width. When θ = 0 ° (θ = 120 °), the change amount of the vane groove width is the smallest because pressing the portion directly above the vane groove 16b widens the vicinity of the open end of the cylinder inner diameter 16a of the vane groove 16b. This is because the second and third places are caulked so as to constrain the spread, and as a result of caulking at an equal pitch of 120 °, the spread of the vane grooves 16b can be suppressed. As shown in FIG. 14, the effect is remarkably shown at about −25 ° ≦ θ ≦ 25 °. For this reason, in a rotary compressor in which three caulking portions are arranged on the outer peripheral surface 16c of the cylinder 16 at an equal pitch of 120 °, the position of one caulking portion should be arranged within ± 25 ° with respect to the vane groove center line. For example, the amount of change in the vane groove can be further reduced, and the performance of the rotary compressor can be improved.

  Many rotary compressors have a vane spring to press the vane against the rolling piston as a countermeasure against vane jumping at the time of startup. The outer peripheral surface on the vane groove of the cylinder is inserted into the outer surface of the vane spring. In such a case, a pilot hole cannot be formed for the hole, and the vane groove cannot be formed in the same direction as the vane groove. The caulking portion cannot be provided on the groove center line, and the hole portion must be avoided.For example, in a rotary compressor of a swing vane in which a vane and a rolling piston are integrated, on the vane groove center line of the cylinder. One caulking portion can be provided.

  In addition, some ordinary rotary compressors do not have a hole for inserting a vane spring in the cylinder. In this case, one caulking portion may be provided on the center line of the vane groove. For example, in a twin rotary compressor in which two cylinders are arranged in the upper and lower directions in the axial direction, if a vane spring is inserted in one of the two, the internal pressure of the sealed container rises due to compression on the side where the vane spring is located, and the vane spring Since the vane of the compression chamber on the non-compression side is also pressed against the rolling piston by its internal pressure, the compression action can be performed in both compression chambers. Even if one vane spring is omitted, it can be established as a compressor. Therefore, as a caulking part is provided so as to fix the cylinder that does not have the vane spring, one caulking part is provided on the vane groove center line. The other two caulking portions may be provided at a position of ± 120 ° on the cylinder circumference.

  The above has described the case of a rotary compressor in which caulking portions are provided at three positions at an equal pitch of 120 °. However, even in a rotary compressor disposed at four locations at an equal pitch of 90 °, one of the caulking portions is vane. If possible, there is no obstacle such as a hole in the vicinity of the groove center line, and the arrangement on the vane groove center line is effective in suppressing the amount of change in the vane groove.

  The distortion of the cylinder 16 that affects the performance of the rotary compressor includes not only the vane groove 16b but also the distortion of the inner diameter 16a. Since the distortion caused by is larger, the arrangement was determined here focusing on this point.

  FIG. 15 is an explanatory diagram when the prepared hole 102 is processed in the outer peripheral surface 16 c of the cylinder 16. In FIG. 15, reference numeral 115 denotes a suction hole for sucking compressed gas into the compression chamber. A total of 6 pilot holes 102 of two points close to one place are machined in three places at a 120 ° equal pitch on the cylinder outer peripheral surface 16c. In this machining, the phase reference of each pilot hole is used as a suction hole. The same at the center of 115. In the case of caulking the sealed container 1 to the cylinder 16 with the apparatus shown in FIG. 12, the pilot hole 102 is used when phasing the cylinder 16 with respect to the three pressing press machines 112 installed at equal pitches. If the phase is determined with reference to the suction hole 115 which is the same as the machining standard, the phases of the pilot hole 102 and the pressing jig 111 can be matched with extremely high accuracy.

  Not only the phase but also the position (height) in the axial direction is processed with the pilot hole 102 as the center of the suction hole 115, and positioning in the axial direction with respect to the pressing press machine 112 when caulking is performed is processing of the pilot hole 102. If the height is positioned with reference to the suction hole 115, which is the same reference as the reference, the height positions of the pilot hole 102 and the pressing jig 111 can be adjusted with extremely high accuracy as in the phase.

  In order to set the processing standard of the lower hole 102 to the suction hole 115, in the processing of the cylinder 16, the processing of the lower hole 102 is performed after the processing of the suction hole 115 while maintaining the holding state of the cylinder 16 when processing the suction hole 115. Then, it is good to process the pilot hole 102 continuously. For example, the suction hole 115 is processed and the pilot hole 102 is processed without releasing the chuck by fixing the chuck 16 so that the inner diameter of the cylinder 16 is stretched toward the outer periphery. Thus, the positional accuracy of the pilot hole 102 with respect to the suction hole 115 can be improved. At that time, it is difficult to simultaneously process a plurality of pilot holes 102 in the vicinity of one fixed part because the drive motor of the blade interferes and a plurality of blades cannot be rotated at the same time. With respect to a plurality of fixed portions, one fixed hole 102 can be processed simultaneously at a plurality of locations in each fixed portion, and the processing time can be shortened compared to the case where all the prepared holes are provided one by one.

  The pilot hole 102 is not chamfered at the inner peripheral edge of the opening, or is chamfered so as to be small enough to remove burrs and burrs in the hole processing to prevent a substantial decrease in the pushing amount H. The occurrence of rattling is prevented by increasing the number of contact points between the pilot holes 102 and the projections 107. When chamfering is not performed, buffing may be performed around the opening of the pilot hole 102 in order to remove burrs and burrs.

  In this way, by setting the standard for preparing the pilot hole for the built-in part and the positioning standard for forming the caulking portion as the same standard, the positions of the pilot hole 102 and the pressing jig 111 can be adjusted with high accuracy, so a small pressing is required. The caulking portion can be formed by force, the force applied to the built-in component by caulking can be reduced, and the occurrence of distortion to the built-in component can be reduced.

  When a caulking portion is formed on the outer peripheral surface of a cylinder by using the present invention to produce a rotary compressor, the method of the present invention is more effective than a conventional method such as caulking with welding or press fitting. Since the amount of distortion of the inner diameter can be reduced, it is possible to fix the cylinder to the sealed container without degrading the performance even if the cylinder has the same outer diameter and the inner diameter is increased and the rigidity of the ring-shaped cylinder is reduced. . Therefore, it is possible to increase the compressor capacity (stroke volume) by expanding the cylinder inner diameter with the same sealed container diameter. In other words, the current compressor capacity can be downsized to a compressor having a sealed container with a smaller diameter than the current one.

  In the above embodiment, the rotary compressor as the compressor and the cylinder 16 of the compression mechanism 101 as the built-in component have been described. However, the fixing method of the built-in component according to the present invention is practically any type of compressor. Even if it is not a hermetic compressor but a semi-hermetic or open compressor, it is not limited to a compressor, but any machine that needs to fix parts to a container. Even if it is a thing, it can be utilized and there exists the same effect. In particular, in a hermetic compressor, since the compressor mechanism part is distorted by fixing the compression mechanism part to the hermetic container, the distortion can be reduced by using the present invention.

As a built-in component fixed to the hermetic container 1, as long as the compression mechanism portion 101 of the rotary compressor, one of the bearing components existing above and below the cylinder other than the above-described cylinder 16 or a twin rotary compressor, It is also possible to form a caulking portion in a component such as a partition plate that exists between two cylinders arranged in the axial direction and partitions the two compression chambers, and has the same effect. If it is applied to a cylinder other than a relatively weak cylinder, the distortion of the cylinder can be further reduced, which contributes to further improvement in compressor performance.

  A scroll compressor supports a fixed scroll that forms a compression chamber, a fixed scroll or an orbiting scroll, and a main bearing part (frame) that supports a rotating shaft in a radial direction, and an electric motor sandwiched between the main bearing parts. It can be applied to fixing to a container such as a sub-bearing part (sub-frame) that is arranged and supports the rotating shaft in the radial direction, and has the same effect. It can also be used to fix an electric motor stator to an airtight container.

  In the above, the convex mechanism 107 formed in the sealed container 1 by local heating is caulked in a plurality of adjacent pilot holes 102, and the compression mechanism section 101 is fixed by the thermal contraction of the sealed container 1 after cooling. However, a fixed portion made of an annular groove is formed on the outer peripheral surface of the compression mechanism portion instead of a plurality of adjacent pilot holes, and an annular protrusion formed on the sealed container by locally heating the annular groove. By caulking the band and by the thermal contraction of the sealed container after cooling, the annular convex band of the sealed container sandwiches the annular groove on the outer peripheral surface of the compression mechanism part toward the center of the circle, so that the compression mechanism part Fixing may be achieved. FIG. 16 is a view of the compressor when viewed from the outside in the radial direction of the hermetic container when such an annular caulking portion is formed. As shown in FIG. A band 116 is formed.

  The pressing jig for forming the annular caulking portion may be formed in a cylinder having an inner diameter equal to or slightly larger than the inner diameter of the annular groove and an outer diameter equal to or slightly smaller than the outer diameter of the annular groove. And the tip surface of the cylindrical pressing jig may be a flat surface, but by making it a curved surface shape along the outer peripheral surface of the sealed container or a curved surface shape smaller than the radius of the outer peripheral surface of the sealed container, it is more than that of a flat surface. An annular caulking portion can be efficiently formed with a small pressing force. Note that the groove on the outer peripheral surface of the compression mechanism and the convex band on the inner periphery of the sealed container are not a complete ring of 360 °, but an annular of 180 ° or more that generates a pinching force due to thermal contraction of the sealed container. As long as it is not an annular groove or a convex band, a sandwiching force can be generated even in a polygonal groove or convex part. In addition, the plurality of convex portions are crimped by a plurality of cylindrical pressing jigs instead of convex bands into the annular groove, and the convex portions sandwich the inner diameter of the annular groove by heat shrinkage of the sealed container, A fixing force may be generated.

  When the annular caulking portion is formed, if the inner diameter of the annular groove is large, the amount of heat shrinkage after caulking is increased, and the force of inserting the closed container convex band is increased. The holding force for fixing the can be increased. However, since the heating range of the sealed container has to be widened, thermal distortion occurs in the sealed container and the roundness of the inner diameter deteriorates, and the compression mechanism part is partially pressed other than the caulking part. Distortion occurs and the compressor performance is reduced.

  Conversely, when the inner diameter of the annular groove is small, the heating range can be reduced, so that the compression mechanism can be prevented from being distorted due to the thermal distortion of the sealed container, but the force of the closed container convex band is reduced. The average half value of the inner diameter and outer diameter of the annular groove is defined as the center radius R of the annular groove, and the half value obtained by subtracting the inner diameter from the outer diameter of the annular groove is the groove of the annular groove. When the width T is defined, regarding the allowable upper limit of R, when the heating range of the sealed container is expanded so that R / T exceeds 2 from the measurement result of the inner diameter roundness of the sealed container before and after heating, the change in roundness Becomes larger. Regarding the allowable lower limit of R, in the specification in which the caulking portions are arranged at substantially equal pitches of 3 to 4 in the circumferential direction, the rattling is 0.6 ≦ R / T from the result of the noise / vibration test. There was no problem of noise and vibration caused by. Therefore, the center radius and groove width of the annular groove are preferably set so as to satisfy 0.6 ≦ R / T <2. By satisfying this relationship, a strong compression mechanism that can withstand normal and excessive force generated during compressor operation and that does not generate rattling can be used for long-term use of the compressor. Fixation to the container is obtained. Even if the inner diameter of the annular groove is constant, the amount of heat shrinkage of the hermetic container 1 can be changed by adjusting the power supply capacity for heating, which is the heating capacity, so as to adjust the insertion force to the built-in components. it can.

Embodiment 2. FIG.
In the second embodiment, an apparatus for realizing the caulking portion formation by local heating of the hermetic compressor shown in the first embodiment will be described. FIG. 17 is a diagram showing the overall configuration of the heating caulking device 200, FIG. 17 (a) is a plan view seen from above, and FIG. 17 (b) is a sectional view taken along line XX in FIG. 17 (a). It is sectional drawing. FIG. 18 is a process diagram showing an operation flow of the heating caulking device 200. As shown in FIG. 18, as an operation process of this apparatus, a positioning process of a workpiece (compressor to be assembled) with respect to a pallet, a positioning process of a pallet with respect to a heating caulking mechanism, and finally a caulking process for actually forming a caulking portion. It is roughly divided into three. In FIG. 17, 201 is a work positioning mechanism that is responsible for a work positioning process of a work (compressor to be assembled) with respect to the pallet, which is the first process, and 202 is a pallet positioning process with respect to the heating caulking mechanism that is the second process. A pallet lift mechanism that bears the heat and a heat caulking mechanism indicated by 203 is responsible for the heat caulking process that is the final third process.

  Here, the assembled compressor is called a workpiece. The workpiece is always placed on a frame called a pallet, and FIG. 19 is a cross-sectional view showing the state of the workpiece placed on the pallet according to the second embodiment of the present invention. In FIG. 19, 204 is a workpiece (compressor in the middle of assembly), and 212 is a pallet. The work 204 is a twin rotary compressor having two compression chambers in the vertical direction. In the sealed container 1, there is a compression mechanism section which is a compression means that is not yet fixed to the sealed container 1. The electric motor stator 2 that is shrink-fitted and fixed to the wall portion of the hermetic container 1 by a compression mechanism unit 210 and another device that is not illustrated in the process prior to the heating caulking device 200 is included. A fixing part that is a component of the compression mechanism 210 and is formed of two pilot holes adjacent to the outer peripheral surface of the upper cylinder 12 that forms the outer wall of one compression chamber, as described in the first embodiment. Are provided at three equal pitches of approximately 120 °, and a total of six caulking points are provided. The upper cylinder 12 is provided with a suction hole 211 penetrating the outer periphery and the inner periphery in the radial direction. Although not shown here, the structure of the upper cylinder 12 is substantially the same as that shown in FIG. 15 of the first embodiment. In the first embodiment, the compression mechanism is indicated by reference numeral 101, but in the example of this embodiment, it is indicated by reference numeral 210.

  In the compressor which is an actual finished product, the compression mechanism section 210 which is a built-in component is arranged at the lower part and the electric motor is arranged at the upper part, but the work 204 in the middle of being put into the heating caulking device 200 is shown in FIG. Thus, it will be in the state where the compression mechanism part 210 exists in the upper part of the electric motor stator 2 so that it may be reversed. Therefore, the upper cylinder 12 exists on the lower side in FIG. Up to this step, the electric motor rotor is not fixed to the crankshaft 6 that transmits the driving force generated by the electric motor to the compression mechanism 210 that is the compression means.

  In order to adjust the height of the workpiece 204 to a predetermined position, a height adjusting ring 213 is interposed between the pallet 212 and the workpiece 204. By exchanging the ring 213 for each model with respect to compressors of different heights, the height of the suction hole 211 with respect to the apparatus can always be secured constant, and the apparatus can be shared. A suction pipe 214 is driven into the suction hole 211 from the outside of the sealed container 1. The suction pipe 214 is driven by another device (not shown) in the process before the heating and caulking device 200, but the workpiece 204 is interposed on the same pallet 212 with the same ring 213 interposed therebetween. The pallet 212 and the ring 213 used in the heating and caulking device 200 are the same as those used in the driving device for the suction pipe 214, which is the previous process, with the workpiece 204 placed on the conveyor. It is conveyed at 205.

  Therefore, since the process of driving the suction pipe 204 is performed on the same pallet 212 and conveyed as it is, the rough phase of the workpiece 204 with respect to the pallet 212 has already been determined. As described in the first embodiment, the heat caulking can reduce the pressing force by aligning the position of the pilot hole and the pressing jig, so it is necessary to accurately align the position of the pilot hole and the pressing jig. is there. The work positioning mechanism 201 responsible for the first step performs a more accurate phasing on the pallet 212 for the work 204 roughly phased with respect to the pallet 212, and fixes the work 204 by the collet mechanism 215. Mechanism.

  The collet mechanism 215 fixes the work 204 to the pallet 212 by simultaneously grasping the inner diameter of the motor stator 2 and the outer diameter of the crankshaft 6. The collet mechanism 215 used here is supplied with air (air pressure). If it is done, it will release grasping and will carry out grasping if air is extracted. The motor stator 2 is shrink-fitted and fixed to the inner periphery of the hermetic container 1. When the collet mechanism 215 is operated, the position of the hermetic container 1 with respect to the pallet 212 is substantially fixed by grasping the inner diameter of the motor stator 2. Will be. Note that the height positioning is determined by the ring 213 described above, and therefore adjustment is not necessary only by selecting the ring 213.

  As described in the first embodiment, the position of the pilot hole and the pressing jig can be aligned with high accuracy by using the same standard as the standard for preparing the hole on the outer peripheral surface of the cylinder and the standard for positioning when forming the caulking portion. Therefore, in the upper cylinder 12 as well, the processing reference for the pilot hole (not shown) on the outer peripheral surface is the suction hole 211, and the positioning reference when the caulking portion is formed is also the same suction hole 211. Since the suction pipe 214 has already been press-fitted into the suction hole 211 in the previous process of the apparatus 200, the suction pipe 214 is used as a positioning reference when forming the caulking portion in the same meaning as the suction hole 211.

  FIG. 20 shows the configuration of the workpiece positioning mechanism 201. 20A is a plan view seen from above, and FIG. 20B is a cross-sectional view taken along line YY in FIG. 20A. 20C is an arrow view taken along arrows A and B shown in FIG. 20A, and FIG. 20D is an arrow view taken along arrow C shown in FIG. 20B. FIG. 21 is a state diagram showing how the workpiece 204 is actually positioned in FIG. As shown in FIG. 21, the head of the first pin 222 that reciprocates in the axial direction is inserted into the bush 216 formed on the pallet 212 by the first air cylinder 220 and the first guide 221. The first pin 222 is formed by integrating a head having a diameter slightly smaller than the inner diameter of the bushing 216 and a cylindrical portion having a diameter larger than the outer diameter of the bushing 216, and an upper end surface of the cylindrical portion serving as the root of the head. Comes into contact with the lower surface of the pallet 212, and the pallet 212 on which the workpiece 204 is placed rises to a height away from the conveyor 205. Although only one first pin 222 is illustrated in the drawing, there are actually four first pins 222, and four bushes 216 are also provided on the pallet 212 on the square. The head of the first pin 222 is pointed into the bush 216 in order to position the pallet 212 with respect to the workpiece positioning mechanism 201. Note that the number of the first pins 222 is not limited to four, and if there are two, the pallet 212 can be raised, and any number may be used as long as it is two or more.

  As the pallet 212 is raised, the height of the phasing pin 226 and the suction pipe 214 of the workpiece 204 are matched. The rising distance of the pallet 212 is determined by the moving distance of the first air cylinder 220 and the length of the first pin 222, but these are fixed, and as described above, between models with different heights, It corresponds by exchanging the ring 213, and the others are not changed. As a result, it is possible to suppress loss due to setup change due to model change. It should be noted that the air cylinder described here refers to a machine that reciprocates linearly by air pressure, and has nothing to do with a cylinder that is a component of the compression mechanism of the rotary compressor.

  The phasing pin 226 is a cylinder whose tip is tapered in a tapered shape, the tip surface is spherical, and its outer diameter is slightly smaller than the inner diameter of the suction pipe 214. As a subsequent operation, the phasing pin 226 is advanced into the workpiece 204 in the radial direction of the workpiece 204 by the second air cylinder 229 and the second guide 230, thereby being inserted into the suction pipe 214 of the raised workpiece 204. To do. At that time, the phasing pin 226 is not fixed and is movable in the extending direction of the conveyor 205 by the guide 227. The extending direction of the conveyor 205 is the left-right direction of FIG.

  Since the phasing pin 226 is movable in the extending direction of the conveyor 205 and the tip shape is tapered or spherical as described above, the phasing is determined even if the suction pipe 214 has a large phase shift. The pin 226 moves and can be inserted into the suction pipe 214 gently. Even when the phasing pin 226 comes into contact with the suction pipe 214 at the start of insertion, the phasing pin 226 moves and escapes, so that the suction pipe 214 is not damaged. In order not to damage the suction pipe 214, the phasing pin 226 is movable in the extending direction of the conveyor 205. Note that the movable range of the phase determination pin 226 is restricted by the stopper 231. As described above, since the rough phasing has already been performed, it is impossible that the phasing pin 226 is completely displaced in the suction pipe 214 and cannot be inserted.

  In addition, the phase determining pin 226 is attached so as to be replaceable. If the model has a different inner diameter of the suction pipe, the phase determining pin 226 can be shared by replacing the phase determining pin corresponding to the inner diameter.

  When the phasing pin 226 is inserted into the suction pipe 214, the coupler 223 for supplying air to the collet mechanism 215 is then linearly moved by the third air cylinder 224 and the third guide 225 shown in FIG. Then, the coupler 223 is connected to the collet mechanism 215. Then, air is supplied to the collet mechanism 215 to release the collet mechanism 215 from gripping the workpiece 204. When it is conveyed on the conveyor 205 from the previous process (previous apparatus) of the heating caulking device 200, the air of the collet mechanism 215 is removed so that the workpiece 204 does not move or rotate on the pallet 212, The collet mechanism 215 is in an actuated state, and at this time, air is supplied and released.

  Since the collet mechanism 215 is released, the workpiece 204 can be moved and rotated on the pallet 212. However, the rotation is free but the movement is only the gap between the released collet mechanism 215 and the motor stator 2 or the crankshaft 6. In such a state, subsequently, the fourth air cylinder 228 that is two on both sides of the phasing pin 226 shown in FIG. The base of the pin 226 is sandwiched from both sides, and the phasing pin 226 is moved to a normal position as a reference. At that time, the work 204 rotates as the phasing pin 226 moves, and the phase of the work 204 with respect to the pallet 212 is corrected with reference to the suction pipe 214. When the phase is corrected, the collet mechanism 215 is immediately evacuated, the collet mechanism 215 is operated, and the work 204 is fixed to the pallet 212. Thereafter, the phasing pin 226 is retracted in the radial direction of the workpiece 204, removed from the suction pipe 214, and the pallet 212 is lowered onto the conveyor 205.

  In this manner, the workpiece positioning mechanism 201 can achieve the phase determination of the workpiece 204 with respect to the pallet 212 with high accuracy without damaging the suction pipe 214 with an inexpensive mechanism. In the above description, after the phasing pin 226 is inserted into the suction pipe 214, air is supplied to the collet mechanism 215 to release the action of the collet mechanism 215. However, after the collet mechanism 215 is released first, A phase determining pin 226 may be inserted into 214.

  Thereafter, the pallet 212 and the workpiece 204 are conveyed on the conveyor 205 to the pallet lift mechanism 202 that is responsible for the pallet positioning process with respect to the heating caulking machine, which is the second process. At this time, the air of the collet mechanism 215 is removed and the collet mechanism 215 is operated, and the work 204 accurately phased on the pallet 212 is fixed to the pallet 212 and does not move.

  As shown in FIG. 17, the pallet lift mechanism 202 is a mechanism that is disposed below the heating caulking mechanism 203 and raises the pallet 212 and the workpiece 204 to the height of the heating caulking mechanism 203. The pallet 212 is positioned with respect to the pallet 212, that is, the workpiece 204 is positioned with respect to the heating caulking mechanism 203. FIG. 22 shows the configuration of the pallet lift mechanism 202. 22A is a cross-sectional view of the pallet lift mechanism 202, and FIG. 22B is a side view of FIG. 22A. In FIG. 22B, the pallet 212, the workpiece 204, the conveyor 205, and the like are omitted.

In FIG. 22, a second pin 251 inserted into a bush 216 provided on the pallet 212 is erected on a plate 252 positioned below the conveyor 205.
Like the first pin 222 described above, the second pin 251 is formed by integrating a head portion having a diameter slightly smaller than the inner diameter of the bush 216 and a cylindrical portion having a diameter larger than the outer diameter of the bush 216. The pallet 212 on which the workpiece 204 is placed is lifted from the conveyor 205 by the upper end surface of the columnar portion serving as the base of the head contacting the lower surface of the pallet 212. Four second pins 251 are also provided on the square with respect to the pallet 212. The number of the second pins 251 is not limited to four. If there are two, the pallet 212 can be raised, and any number may be used as long as it is two or more.

  Similarly, a positioning shaft 260 wider than the width of the conveyor 205 is erected on the plate 252 so as to surround the pallet 212. The positioning shaft 260 is a cylinder, and a head having a diameter smaller than the diameter of the cylinder is integrated on the tip side, and the head is stepped in a diameter decreasing toward the tip or tapered. It is formed so that the diameter decreases toward the tip in a shape or a spherical shape. Four positioning shafts 260 are provided at a larger interval than the pallet 212 so as to surround the pallet 212.

  When the motor 250 is driven, the ball screw 255 connected to the motor 250 via the coupling 258 rotates. There is the same ball screw 255 across the conveyor 205 on the side opposite to the side where the motor 250 is located. These two ball screws 255 are connected to each other by a belt 257 via a pulley 256 and are synchronized. Rotate. Holes that allow the respective ball screws 255 to pass therethrough are provided on the outside of the plate 252, and a feed bush 262 having a female screw portion that meshes with each ball screw 255 exists at the lower part of the holes. . The rotation of the two ball screws 255 raises the two feed bushes 262 to push up the lower surface of the plate 252, and the plate 252 rises toward the heating caulking mechanism 203 located at the top of the pallet lift mechanism 202.

  When the plate 252 rises, the plate 252 is guided by the feed guide 254 and rises along the feed guide 254. At this time, there are four feed guides 254 so as to surround the pallet 212. Four cylindrical portions 261 extend along the guide on the lower surface of the plate 252, and a gap is provided between the guide 254 and the cylindrical portion 261, and this gap is smaller than the gap between the plate 252 and the ball screw 255. Therefore, the plate 252 is in a state where it can move by the gap between the cylindrical portion 261 and the guide 254.

  When the plate 252 is raised, the positioning shaft 260 comes into contact with the positioning bush 259. Since the positioning bush 259 has a concave portion that fits with the head of the positioning shaft 260 with a small gap, the positioning shaft 260 is placed on the concave portion. The head is fitted. The concave portion may be cylindrical or spherical. The plate can move by the gap between the cylindrical portion 261 of the plate 252 and the guide 254, and the head of the positioning shaft 260 is stepped toward the tip, the diameter is reduced, or the tip is tapered or spherical. Therefore, even if the positioning shaft 260 and the positioning bush 259 are misaligned, the plate 252 moves so that the head of the positioning shaft 260 and the concave portion of the positioning bush 259 Fit securely. Then, when the upper end surface of the cylinder that is the base of the head of the positioning shaft 260 comes into contact with the lower end surface of the positioning bush 259, the ascent of the plate 252 stops.

  The length of the positioning shaft 260 is set so that the workpiece 204 on the pallet 212 has a normal height with respect to the heating caulking mechanism 203 in a state where the ascent is stopped. The normal height here means that the height of the pressing jig 111 of the heating caulking mechanism 203 and the prepared hole of the outer peripheral surface of the upper cylinder 12 are matched. Thereby, the height position of the work 204 with respect to the heating caulking mechanism 203 is determined. When the four positioning shafts 260 and the positioning bushing 259 are fitted, the plate 252 moves, so that the pallet 212 having the bushing 216 fitted with the second pin 251 standing on the plate 252 is also moved. Then, the coordinate position of the pallet 212 with respect to the heating caulking mechanism 203 becomes a normal position, and the workpiece 204 on the pallet 212 is positioned with respect to the pallet 212 by the workpiece positioning mechanism 201 on the near side, and the collet with respect to the pallet 212 is colleted. Since it is fixed by the mechanism 215, the positioning of the workpiece 204 with respect to the heating caulking mechanism 203 is thereby completed.

  At this time, the end faces of the four positioning shafts 260 and the positioning bush 259 are in contact with each other so as to surround the pallet 212. Therefore, even if an inclination occurs when the plate 252 rises, The parallelism is also corrected, so that there is no inclination of the pallet 212 with respect to the heating caulking mechanism 203 of the workpiece 204, and the parallelism is ensured. The collet mechanism 215 continues to operate after the ascent. In FIG. 22, reference numeral 263 denotes an empty pallet return conveyor which is different from the conveyor 205 which conveys the pallet 212 on which the workpiece 204 is placed.

  In this way, the pallet lift mechanism 202 can realize the positioning and parallelism of the pallet 212 with respect to the heating caulking mechanism 203 with high accuracy by an inexpensive mechanism, and as a result, the pressing jig 111 and the upper cylinder of the heating caulking mechanism 203. 12 The position of the prepared hole on the outer peripheral surface and the interval between the pressing jig 111 and the workpiece 204 before pressing can be matched with high accuracy. The number of positioning shafts 260 and positioning bushes 259 is not limited to four, and if there are two, the plate 252 can be raised, and any number of two or more positioning shafts can be used. Although two cannot correct the parallelism of the plates 252, three or more are preferable so as to surround the pallet 212 as described above.

  FIG. 23 shows a configuration of a heating caulking mechanism 203 that actually heats and caulks the workpiece 204 positioned above the pallet lifting mechanism 202 and positioned with high accuracy by the pallet lifting mechanism 202. FIG. 23A is a plan view seen from above the heating caulking mechanism 203, and FIG. 23B is a cross-sectional view taken along the line P-P in FIG. ) Is an arrow view according to the arrow Q shown in FIG.

  In FIG. 23B, there is a pallet lift mechanism 202 on the right side of the drawing, and the workpiece 204 rises from the right side of the drawing to the left side. A pressing shaft 287 that reciprocates by the fifth air cylinder 285 and the fifth guide 286 is pressed down on the upper part of the workpiece 204 that has been lifted and positioned. Only one presser shaft 287 is located in the center of FIG.

  If the caulking parts at three places in the circumferential direction (the number of caulking points is 6) are arranged at an equal pitch of 120 ° and the same pressing force is applied at the same time, no moment is applied to the work 204. It is difficult to apply the same pressing force at the same time due to the variation of 204 and the control of the device, etc. Especially when the time lag occurs, the work is performed by pressing the first one of the three locations. 204 may move or rotate, and the position of the workpiece 204 and the pressing jig 111 may be shifted in the second and third caulking. Therefore, the heating caulking mechanism 203 includes a backup shaft 271 that receives the pressing force of the caulking punch 270 on the side opposite to the caulking position of the workpiece 204. The backup shaft 271 is fixed to a flange 272, and the flange 272 is connected to a caulking side flange 273 to which a caulking punch 270 having a pressing jig 111 at the tip is attached by four link shafts 274. A servo press 277 for reciprocating the caulking punch 270 at a high speed is fixed to the caulking side flange 273.

  The heating caulking mechanism 203 includes three heating caulking machines, each of which includes four link shafts 274 so as to surround the caulking punch 270 and the backup shaft 271. Since the three caulking punches 270 and the three backup shafts 271 have the same height, the intervals between the link shafts 274 are different and are arranged so as to intersect vertically. Therefore, the size of the flange 273 to which the link shaft 274 is connected and the size of the caulking side flange 274 are different in the three heating caulking machines, and the interval between the four link shafts 274 is the smallest and is arranged in the center 4. The flange 273 and the caulking side flange 274 of the heating caulking machine having the link shaft 274 are the smallest.

  In each of the three heat caulking machines, the flange 273 and the caulking side flange 274 connected to the four link shafts 274 are integrally formed by the sixth air cylinder 275 and the sixth guide 276 to extend the link shaft 274. Can reciprocate in the current direction. The backup shaft 271 is brought into contact with the work 204 whose upper portion is pressed by the holding shaft 287 from three directions by direct movement by the sixth air cylinder 275 and the sixth guide 276. The force with which the presser shaft 287 presses the work 204 from above is large enough to prevent the work 204 from moving when the backup shaft 271 contacts the work 204. It is preferable that the three backup shafts 271 are moved simultaneously and brought into contact with the workpiece 204 at the same time because the manufacturing time can be shortened. There is no problem in that there is no misalignment. The contact surface of the tip of the backup shaft 271 with the workpiece 204 may be a flat surface, but if the workpiece 204 is formed in a curved surface substantially the same as the outer peripheral surface of the sealed container 1, the backup shaft 271 and the workpiece 204 are provided. The contact area of the is increased, and the pressing force can be reliably received.

  While the backup shaft 271 is in contact with the workpiece 204 from three directions, the caulking punch 270 is moved in the direction of the workpiece 204 by operating the servo press 277 to contact the tip pressing jig 111 and the wall of the sealed container 1. Let The servo press 277 stores the position information of the caulking punch 270 in the contact state as data. Each servo press 277 stores the position information of each caulking punch of the three heat caulking machines. The caulking punch 270 is once retracted by the operation of the servo press 277 again. Then, the seventh air cylinder 280 for reciprocating the high-frequency heating coil 278 for heating up and down and the seventh guide 281 are operated to lower the high-frequency heating coil 278 toward the workpiece 204, and further the extending direction of the link shaft 274 The eighth air cylinder 282 and the eighth guide 283 that cause the high-frequency heating coil 278 to reciprocate are operated to bring the high-frequency heating coil 278 closer to the workpiece 204 in the radial direction of the workpiece 204.

  The high frequency heating coil 278 is fixed by a holder 279. When the high-frequency heating coil 278 is moved in the radial direction, the high-frequency heating coil 278 is provided with a stopper mechanism 284 for maintaining a predetermined distance between the sealed container 1 of the work 204 and the high-frequency heating coil 278. By moving the high-frequency heating coil 278 until the mechanism 284 comes into contact with the sealed container 1, a predetermined distance between the wall of the sealed container 1 and the high-frequency heating coil 278 is secured. The high-frequency heating coil 278 is moved in the radial direction because the dimensions of the hermetic container 1 vary, and the three high-frequency heating coils 278 always have a predetermined distance from the hermetic container 1 with respect to the workpiece 204 only by lowering. This is because it is difficult to secure. Ensuring a predetermined distance between the sealed container 1 and the high-frequency heating coil 278 by bringing the stopper mechanism 284 into contact with the sealed container 1 can determine the position of the high-frequency heating coil 278 on the basis of the outer peripheral surface of the sealed container 1. In other words, a predetermined distance can always be secured without being affected by variations in dimensions of the sealed container 1. Moreover, since it is applicable also to the airtight container from which an outer diameter differs, it is excellent in versatility. Even if it is not a contact stopping mechanism, a non-contact method using infrared rays or the like may be used as long as it is based on the outer periphery of the sealed container 1.

  Each of the three heating caulking machines has a high-frequency heating coil 278, and at the same time, the high-frequency heating coil is moved, and when all the three distances between the sealed container 1 and the high-frequency heating coil 278 are secured to a predetermined distance. Then, a current is passed through the high-frequency heating coil 278 to heat the closed container 1 of the workpiece 204. When the heating part of the hermetic container 1 is heated to a predetermined temperature, for example, 900 ° C., the current is stopped to complete the heating, and the high-frequency heating coil 278 is replaced with the eighth air cylinder 282 and the eighth guide. The second air cylinder 280 and the seventh guide 281 are moved up and moved away from the workpiece 204 by moving the second air cylinder 280 and the seventh guide 281 away from the workpiece 204 in the radial direction of the workpiece 204. After heating to a predetermined temperature, before the heat of the sealed container 1 is cooled, for example, within 1 second after the completion of heating, the servo press 277 is operated, the caulking punch 270 is advanced toward the workpiece 204, and the pressing jig 111 is moved. Thus, a pressing force is applied to the sealed container 1, a convex part is formed on the inner peripheral side of the wall of the sealed container 1, caulking with the lower hole of the upper cylinder 12, and the heat of the sealed container 1 after cooling. A pinching force is generated between the pilot holes by contraction. This is performed simultaneously with three heating caulking machines, and pinching forces are generated at three positions at equal pitches, and the compression mechanism 210 is fixed to the sealed container 1.

  Prior to caulking, since the servo press 277 stores the position where the caulking punch 270 contacts the sealed container 1, the pressing completion position of the caulking punch 270 that obtains the length of the predetermined convex portion is calculated from the data. Based on the result, the servo press 277 advances the caulking punch 270 to that position, so that the convex portion of the sealed container 1 can be stably formed to a predetermined length. Since the flange 272 and the caulking side flange 273 are connected by the four link shafts 274 so as to surround the backup shaft 271 and the caulking punch 270, the heating caulking machine has high rigidity and can be caulked stably. Even if the link shaft 274 is one or two, both flanges can be connected, so that it is established as a device. However, in order to secure sufficient rigidity and realize stable caulking, a moment is supported. It is desirable to install three or more link shafts. Prior to caulking, the position where the caulking punch 270 comes into contact with the sealed container 1 is stored in the servo press 277, and the pressing completion position of the caulking punch 270 from which the length of the predetermined convex portion is obtained is calculated from the data. The pressing completion position is determined on the basis of the outer peripheral surface of the container 1, and a convex portion having a predetermined length can be secured stably without being affected by variations in the dimensions of the sealed container 1.

  After the caulking is completed, the pressing shaft 287 is raised to release the pressing, and the heating caulking process is completed. The pallet 212 is lowered by the pallet mechanism 202, and the workpiece 204 is moved on the conveyor 205 toward the apparatus for performing the next process. At this time, since the compression mechanism 210 is fixed to the closed container 1 by the clamping force generated by the two caulking points adjacent to each other at three places in the circumferential direction, even if the collet mechanism 215 is released. I do not care.

  Thus, the caulking mechanism 203 can realize caulking with stable quality, and the heating caulking mechanism 203 includes the backup shaft 271. Therefore, the positions for heating caulking at a plurality of locations are 120 ° as described above. Even if the pitches are not equal, the back-up shaft 271 supports the pressing force of the caulking punch 270, so that caulking can be realized without applying a moment to the workpiece 204. Depending on the shape of the compression mechanism, the adjacent pilot holes may not be arranged at an equal pitch, and even such a workpiece can be caulked. In addition, even if a plurality of locations are not caulked at the same time and are shifted one by one in time, the backup shaft 271 supports the pressing force of the caulking punch 270, so that no moment is applied to the workpiece 204. Caulking can be realized.

  The compressor in which the compression mechanism is fixed to the closed container by the clamping force between the adjacent caulking points due to the thermal contraction of the closed container is a compressor for long-term use of the compressor. The compressor can withstand the normal and excessive force generated during operation and the rigid compression mechanism 210 is fixed to the sealed container 1 without rattling. Further, since the distortion of the compressor mechanism is small, the performance can be improved. Furthermore, since the sealed container 1 cannot be pierced, a highly reliable compressor can be obtained in which foreign matter such as spatter is not mixed and the problem that the compressor cannot be operated due to the inclusion of the foreign matter does not occur.

  In addition, although said Embodiment 2 was the heating crimping apparatus 200 used when carrying out three places of the crimping | crimping point of two adjacent points in the circumferential direction, increasing the number of the crimping points which approach is more than two points, This can be handled by increasing the number of pressing jigs for the caulking punch. Even when four or more caulking portions are formed in the circumferential direction, the expansion can be achieved by increasing the number of heating caulking machines. However, when the four caulking punches are arranged at four positions with an equal pitch of 90 °, the back-up shaft cannot be installed because the two caulking punches are opposed to each other in a straight line. The flange that fixes the back-up shaft and the link shaft for connection Is also unnecessary.

Embodiment 3 FIG.
In the workpiece positioning mechanism 201 shown in the second embodiment, the phase determination pin 226 is inserted into the suction pipe 214, and the phase determination pin 226 is moved to the reference position, thereby realizing the phase determination of the workpiece 204. In the third embodiment, a workpiece positioning mechanism 290 of another form is shown. The pallet lift mechanism and the heating caulking mechanism other than the workpiece positioning mechanism 290 are the same as the pallet lift mechanism 202 and the heating caulking mechanism 203 shown in the second embodiment, and a description thereof is omitted here.

  FIG. 24 shows a configuration of the workpiece positioning mechanism 290 of this form and a state where the workpiece 204 is actually positioned. Similar to the workpiece positioning mechanism 201 of the second embodiment, first, the head of the first pin 222 that reciprocates in the axial direction on the pallet 212 on which the workpiece 204 is placed by the first air cylinder 220 and the first guide 221. By inserting the portion into the bushing 216, the height is raised away from the conveyor 205. As the pallet 212 is raised, the heights of the image recognition camera 232 and the suction pipe 214 of the workpiece 204 are matched. Similar to the workpiece positioning mechanism 201 of the second embodiment, the rough phase of the workpiece 204 with respect to the pallet 212 has already been determined, and the workpiece positioning mechanism 290 is roughly phased with respect to the pallet 212. In this mechanism, the workpiece 204 is phased more accurately and fixed to the pallet 212 by the collet mechanism 215.

  The image recognition camera 232 captures the suction pipe 214, recognizes the inner peripheral edge of the suction pipe 214 from the brightness of the image, thereby calculating the inner diameter of the suction pipe 214 at a plurality of locations, and calculates the current position from the plurality of inner diameters. The center of the suction pipe 214 is grasped. The image recognition camera 232 stores in advance the center position of the master work suction pipe in the normal phase state, compares the center position of the master work suction pipe with the current center position of the suction pipe 214, It is determined whether the deviation is at an acceptable level. If it is within the allowable level, the pallet 212 is lowered while the collet mechanism 215 is held without being released, and the pallet lift mechanism 202 responsible for the pallet positioning step with respect to the heating caulking machine, which is the second step. Then, the conveyor 205 is conveyed.

If it is determined that the phase shift is outside the allowable level, the phase is corrected. This correction process will be described below. Air is supplied to the collet mechanism 215 of the workpiece 204 to release it, and the chuck 236 connected by the plate 239 is lowered by the operation of the chuck vertical air cylinder 237 and the guide of the chuck vertical guide 238. The chuck 236 has a work clamping claw 242 in the lower part. When the chuck 236 is lowered, the work clamping claw 242 is lowered to a position where the work 204 can be grasped. Although only one workpiece clamping claw 242 is depicted in FIG. 24, there are actually three. The number of workpiece clamping claws 242 may be any number as long as it is two or more that can grip and rotate the workpiece 204. Then, by supplying air to the chuck 236, the three work clamping claws 242 move toward the work 204,
Grab and hold the workpiece 204. The chuck 236 is not operated by air, but may be an electric or hydraulic chuck. Further, the collet mechanism 215 may be released after the workpiece clamping claw 242 grasps the workpiece 204.

  The image recognition camera 232 calculates an angle to correct the phase of the workpiece 204 from the deviation amount between the master reference suction pipe center position stored as a reference and the current suction pipe 214 center position. The chuck 236 is rotated. The rotation of the chuck 236 is achieved by adjusting the rotation of the servo motor 243 with the gear 244 and transmitting it to the shaft 241 via the coupling 245, and this shaft 241 is connected to the chuck 236, and is necessary for correction. The chuck rotates by the angle. The shaft 241 is supported by the bearing unit 240 in the radial direction and the axial direction.

  When the rotation of the workpiece 204 for correcting the phase shift is completed, the image recognition camera 232 captures the suction pipe 214 of the rotated workpiece 204 again, grasps the center position thereof, and again the center position of the master workpiece suction pipe; The current center position of the suction pipe 214 is compared, and it is determined whether the phase shift is at an acceptable level. If it is within the allowable level, the collet mechanism 215 is evacuated, the collet mechanism 215 is actuated, and the workpiece 204 is fixed to the pallet 212. Then, the chuck 236 is released, the work clamping claw 242 is opened, and the chuck 236 is raised by the operation of the chuck vertical air cylinder 237 and the guide of the chuck vertical guide 238. Almost simultaneously with the raising of the chuck 236, the pallet 212 is lowered, and the pallet lift mechanism 202 responsible for the pallet positioning process with respect to the heating caulking machine, which is the second process, is conveyed on the conveyor 205. If it is determined that the phase shift is outside the permissible level in the second determination after the correction, the collet 215 remains released, the chuck 236 is not released, and the phase correction operation is performed again in the same manner. The process is repeated until it is determined that it is within the permissible level. However, as long as there is no trouble in the apparatus, it can be normally completed with one correction.

  In this manner, the workpiece positioning mechanism 290 can accurately determine the phase of the workpiece 204 with respect to the pallet 212 without contacting the suction pipe 214. It should be noted that this is a step after the phase of the workpiece 204 is corrected by the rotation of the chuck 236 and before the pallet 212 is lowered, and a re-determination step by the image recognition camera 232 and the work 204 by the action of the collet mechanism 215. The fixing process with respect to the pallet 212 and the opening process of the work clamping claw 242 by releasing the chuck 236 are not limited to the above order, and the image recognition is performed after the work 204 fixing process by the action of the collet mechanism 215 is performed first. The re-determination process by the camera 232 and the work clamping claw 242 opening process may be performed in this order, or after the work 204 fixing process by the action of the collet mechanism 215 is performed first, the work clamping claw 242 opening process, You may advance in order of the redetermination process by the image recognition camera 232. However, when proceeding in this order, if it is determined that the re-determination step is outside the allowable level, the former requires a step of releasing the collet mechanism 215 again, and if the latter, the step of releasing the collet mechanism 215. The process of gripping the work clamping claws 242 is required again.

  In the second and third embodiments, the workpiece 204 is a twin rotary compressor, and the outer periphery of the upper cylinder 12 is caulked, but the other lower cylinder other than the upper cylinder 12 or the upper or lower portion of the upper cylinder 12 Even when the caulking part is formed on the partition plate that divides the two compression chambers between the two cylinders, one of the upper and lower bearing parts arranged in the lower part of the cylinder, the same device realizes caulking with accurate and stable quality. It can be applied to single rotary compressor cylinders and upper / lower bearings, scroll compressor fixed scrolls, main bearing parts and auxiliary bearing parts, and compressor motor stators with only one cylinder. And has the same effect.

  The compressor according to the embodiment of the present invention includes a built-in component such as a compression mechanism unit housed in a container and provided through a gap, and is provided opposite to the container on the outer peripheral side of the built-in component. A fixed portion having a plurality of prepared holes and a container wall facing the fixed portion, and is pressed from the outside of the container to enter the prepared holes on the outer peripheral surface of the built-in component. It has a container convex part to be fixed, and it fixes between the pilot holes of the built-in parts with the container convex part while the container is heated in a temperature range above the softening temperature of the container material and below the melting point. When heating the container wall (near the convex) facing the pilot hole of the component, the heating temperature is in the range of 600 ° C. to 1500 ° C., preferably in the range of 800 ° C. to 1100 ° C. for several seconds. is there. Moreover, it has an annular groove of 180 ° or more as a fixing portion, not a plurality of pilot holes.

Further, the compressor according to the embodiment of the present invention includes a built-in component such as a compression mechanism unit housed in a container and provided through a gap, and is provided in close proximity to the container on the outer peripheral side of the built-in component. A fixed portion having a plurality of prepared holes and a container wall facing the fixed portion, and is pressed from the outside of the container into the prepared holes on the outer peripheral surface of the built-in component, and the container and the built-in component are The distance between the center of the pilot hole and the center of the pilot hole arranged close to each other so as to suppress the heating range for heating the container convex part and the vicinity of the container convex part is within a predetermined value range. The distance between the center of the prepared holes arranged close to each other and the center of the prepared hole is made smaller than twice the diameter of the prepared hole and more than 0.6 times. Also, the force for fixing the built-in component in the container can be adjusted by at least one of the distance between the center between the prepared holes arranged close to each other and the center of the prepared hole and the heating capacity for heating the vicinity of the container convex portion. Is a thing

In the compressor according to the embodiment of the present invention, the pushing amount of the container convex portion entering the pilot hole is 0.5 times or less of the container plate thickness or about 1 mm, and the container convex portion entering the pilot hole The pressing jig for forming the fixing jig is fixed by the number of pilot holes arranged close to each other. The pressing jig is equal to or less than the pilot hole diameter of the built-in component and has a pilot hole diameter of It has an outer diameter larger than 0.5 times.

Further, the compressor according to the embodiment of the present invention is a cylinder that covers the compression chamber of the compression mechanism unit in which the built-in component performs compression, or a frame that forms the compression chamber or rotatably supports the compression mechanism unit, It is a component such as a partition plate and a bearing support member, and a plurality of fixing portions including a plurality of pilot holes are provided on the outer peripheral side of the built-in component.

Further, the compressor according to the embodiment of the present invention is provided in a container, which is housed in a container and provided with a built-in component such as a compression mechanism portion provided through a gap, and provided on the outer peripheral side of the built-in part so as to face the container. A fixed part that is an annular groove of at least °, and a container wall that faces the fixed part, and is pressed from the outside of the container to enter the annular groove to fix the container and the built-in component The center radius of the annular groove is made smaller than twice the width of the annular groove and 0.6 times or more so as to suppress the heating range in which the convex portion and the vicinity of the container convex portion are heated. It is. Further, the force for fixing the built-in component in the container can be adjusted by at least one of the heating capacities for heating the vicinity of the convex portion of the container, and the fixing portion which is an annular groove of 180 ° or more is provided in the built-in component. A plurality are provided on the outer peripheral side.

The compressor according to the embodiment of the present invention includes a step of providing a plurality of prepared holes arranged close to each other on the outer peripheral side of the built-in component such as the compression mechanism unit, and storing the prepared holes in a container provided through a gap. The heating range is suppressed to a position facing the plurality of pilot holes of the built-in parts, and heating is performed from the outside of the container at a temperature range above the softening temperature of the container material and below the melting point. The step of pressing the container wall part to enter the container wall part into the pilot hole, and sandwiching the built-in part with the container wall part inserted into the plurality of pilot holes arranged in the circumferential direction on the outer peripheral side of the internal part A heating capacity for heating the container and a distance between the center between the pilot holes and the center of the pilot hole arranged close to each other, and a force for clamping the built-in component and fixing the container to the container. Adjust with at least one of It is intended. A compressor manufacturing method characterized by the above.

According to the compressor of the embodiment as described above of the present invention, the force received by the compression mechanism when the compression mechanism of the built-in component is fixed to the container is reduced, and the occurrence of distortion of the compression mechanism is reduced. In addition, the built-in components can be securely and firmly fixed to the container, and withstand long-term use of the compressor, withstand normal and excessive forces generated during the operation of the compressor. It is possible to obtain a high-performance and highly reliable compressor that does not cause problems such as noise and vibration increase due to sticking.

1 is a cross-sectional view schematically showing a hermetic compressor according to Embodiment 1 of the present invention. It is principal part sectional drawing for demonstrating the structure and method of a crimping part shown in FIG. It is principal part sectional drawing for demonstrating the structure and method of a crimping part shown in FIG. It is principal part sectional drawing for demonstrating the structure and method of a crimping part shown in FIG. It is principal part sectional drawing for demonstrating the structure and method of a crimping part shown in FIG. It is the figure which looked at the caulking part shown in Drawing 1 from the outside of an airtight container. It is principal part sectional drawing for demonstrating the structure of the crimping part shown in FIG. It is the figure which looked at a certain example of arrangement from the outside of an airtight container when the number of caulking points which adjoin is three points. It is the figure which looked at a certain example of arrangement from the outside of an airtight container when the number of caulking points which adjoin is four. It is a simplification figure which shows the crimping punch for forming a convex part in an airtight container. It is a figure for demonstrating the structure of the crimping part shown in FIG. It is a simplified diagram showing an apparatus for forming a caulking portion. It is a figure for demonstrating the phase of a several crimping part. It is a graph which shows the change of the cylinder vane groove width by the phase change of a caulking part. It is a figure for demonstrating the pilot hole process on the basis of the suction hole of a cylinder. It is the figure which looked at the example which forms a ring-shaped caulking part from the outside of an airtight container. It is a whole block diagram of the heating crimping apparatus by Embodiment 2 of this invention, (a) is a top view, (b) is sectional drawing. It is an operation | movement flowchart of a heating caulking apparatus. It is a figure which shows the state of the workpiece | work mounted on the pallet. It is a block diagram of a workpiece | work positioning mechanism, (a) is a top view, (b) is sectional drawing, (c) And (d) is a partial arrow view. It is a figure which shows the state of a workpiece | work positioning mechanism. It is a block diagram of a pallet lift mechanism, (a) is sectional drawing, (b) is a side view. It is a block diagram of a heating caulking mechanism, (a) is a top view, (b) is a sectional view, and (c) is an arrow view. It is a figure which shows the structure and state of the workpiece | work positioning mechanism of the heating crimping apparatus by Embodiment 3 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Airtight container (container), 2 stator, 3 rotor, 6 crankshaft, 12 upper cylinder, 16 cylinder, 16a internal diameter, 16b vane groove, 16c outer peripheral surface, 101 compression mechanism part (built-in component, compression means), 102 Pilot hole, 103 suction pipe, 106 container concave part, 107 container convex part, 108 heating range, 109 heating center, 110 base part, 111 pressing jig, 112 pressing press machine, 113 pressing force, 114a first caulking part position, 114b Second caulking position, 114c Third caulking position, 115 suction hole, 116 annular concave band, 200 heating caulking device, 201 work positioning mechanism, 202 pallet lift mechanism, 203 heating caulking mechanism, 204 Workpiece (compressor), 205 conveyor, 210 compression mechanism, 211 Entry hole, 212 pallet, 213 ring, 214 suction pipe, 215 collet mechanism, 216 bush, 220 first air cylinder, 221 first guide, 222 first pin, 223 coupler, 224 third air cylinder, 225 Third guide, 226 phasing pin, 227 guide, 228 fourth air cylinder, 229 second air cylinder, 230 second guide, 231 stopper, 232 image recognition camera, 236 chuck, 237 chuck upper and lower air cylinder, 238 Chuck up / down guide, 239 plate, 240 Bearing unit, 241 shaft, 242 Work clamp claw, 243 Servo motor, 244 gear, 245 coupling, 250 motor, 251 2nd pin, 252 Plate, 25 3 plate, 254 guide, 255 ball screw, 256 pulley, 257 belt, 258 coupling, 259 positioning bush, 260 positioning shaft, 261 cylindrical part, 263 conveyor, 270 caulking punch, 271 backup shaft, 272 flange, 273 caulking side flange 274 Link shaft, 275 Sixth air cylinder, 276 Sixth guide, 277 Servo press, 278 High-frequency heating coil, 279 Holder, 280 Seventh air cylinder, 281 Seventh guide, 282 Eighth air cylinder 283, eighth guide, 284 contact mechanism, 285 fifth air cylinder, 286 fifth guide, 287 presser shaft, 290 workpiece positioning mechanism.

Claims (1)

A plurality of lower holes on the outer peripheral side Ru are located close to one another in the built-in parts such as the compression mechanism section provided, comprising the steps of: storing in a container of the internal parts through the gap, opposed to the plurality of the prepared hole The container is heated from the outside of the container in a temperature range lower than the melting point and lower than the melting point while pressing the container wall portion with a pressing jig having an inner diameter of the pilot hole or less. A step of inserting a wall portion into the pilot hole, and a step of sandwiching the built-in component at the container wall portion inserted into the plurality of pilot holes arranged at a plurality of positions in the circumferential direction and fixing the built-in component to the container. provided, the force of fixing to the container by pinch the built-in component by at least one of the distance and the heating capacity for heating the container between the center and the lower hole center between the pilot hole that will be placed close to each other To adjust Method for manufacturing a compressor according to claim.

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