WO2017141636A1 - 密封装置のバネ部材の製造方法 - Google Patents
密封装置のバネ部材の製造方法 Download PDFInfo
- Publication number
- WO2017141636A1 WO2017141636A1 PCT/JP2017/002195 JP2017002195W WO2017141636A1 WO 2017141636 A1 WO2017141636 A1 WO 2017141636A1 JP 2017002195 W JP2017002195 W JP 2017002195W WO 2017141636 A1 WO2017141636 A1 WO 2017141636A1
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- WO
- WIPO (PCT)
- Prior art keywords
- circle
- spring member
- inner peripheral
- sealing device
- lip
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/16—Folding; Pleating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3208—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings
- F16J15/3212—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings with metal springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
- F16J15/3236—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips with at least one lip for each surface, e.g. U-cup packings
Definitions
- the present invention relates to a method of manufacturing a spring member of a sealing device, and more particularly to a method of manufacturing a spring member of a sealing device for sealing an annular space between two members that can move relative to each other.
- FIG. 7 is a partial cross-sectional view showing a schematic configuration of this type of conventional sealing device.
- the conventional sealing device 100 shown in FIG. 7 is configured to seal the annular space between the opening 112 of the housing 111 and the shaft 113 inserted through the opening 112 so as to be relatively movable. 113 is used by being attached between.
- the sealing device 100 includes an annular lip member 101 around an axis formed from a resin material such as PTFE (polytetrafluoroethylene) and an annular spring member 102 around an axis formed from a metal material.
- a resin material such as PTFE (polytetrafluoroethylene)
- an annular spring member 102 around an axis formed from a metal material.
- an annular outer lip 105 extends from the outer peripheral side to the high pressure side at the end of the annular lip base 104 on the high pressure side (right side in FIG. 7).
- An annular inner circumferential lip 106 extends from the inner circumferential side to the high pressure side at the end, and an annular housing groove 103 is formed that is recessed toward the low pressure side (left side in FIG. 7) in the axial direction. As shown in FIG.
- the spring member 102 is an annular member having a substantially V-shaped cross section, and is accommodated in the accommodation groove 103, extending from the low pressure side of the spring member 102 to the high pressure side and the outer peripheral side.
- An outer peripheral pressing portion 107 is in contact with the outer peripheral lip 105 from the inner peripheral side, and an inner peripheral pressing portion 108 extending from the low pressure side of the spring member 102 to the high pressure side and the inner peripheral side is extended to the inner peripheral lip 106. Touching from the side.
- the sealing device 100 is such that the outer peripheral lip 105 is in close contact with the opening 112 of the housing 111, the inner peripheral lip 106 is in close contact with the shaft 113, and the outer peripheral lip 105 and the inner peripheral lip 106 approach each other.
- the tightening width is pressed, and the spring member 102 is compressed.
- the outer peripheral lip 105 is pressed against the opening 112 of the housing 111 by the reaction force of the outer peripheral pressing portion 107
- the inner peripheral lip 106 is pressed by the reaction force of the inner peripheral pressing portion 108.
- the space between the housing 111 and the shaft 113 is sealed by being pressed against the shaft 113.
- PTFE as a material of the lip member 101 can be used under high temperature and high pressure, has excellent chemical resistance and oil resistance, and has characteristics suitable as a lip member. ) Is likely to occur. For this reason, it is difficult to maintain the sealing performance (tightening allowance) required for the PTFE lip member for a long period of time. In particular, the PTFE lip member is easily plastically deformed at high temperatures, and the high temperature environment has a great influence on the sealing performance. For this reason, the sealing device 100 is provided with the spring member 102 as described above. Even if the lip member 101 undergoes plastic deformation (sagging) due to high temperature and the tightening margin is reduced, the spring member 102 remains in the lip member 101. The sealing performance of the sealing device 100 is maintained by pressing.
- the outer peripheral lip is determined from the difference in linear expansion coefficient between the metal material of the housing 111 and the material of the lip member 101. 105 is strongly pressed against the housing 111, and plastic deformation occurs in the outer peripheral lip 105, and the tightening margin of the outer peripheral lip 105 with respect to the housing 111 may decrease. For this reason, in the sealing device 100, in order to compensate for a reduction in tightening due to plastic deformation of the outer peripheral lip 105 at a high temperature, the rigidity of the outer peripheral lip 105 is reduced and the outer peripheral pressing portion 107 of the spring member 102 is reduced.
- the influence (degree of pressing) on the outer peripheral lip 105 is increased (for example, see Patent Document 1).
- the rigidity of the inner peripheral lip 106 is reduced to compensate for the reduction in the tightening allowance due to plastic deformation of the inner peripheral lip 106 at a high temperature, and the spring member It can be considered that the influence (degree of pressing) on the inner peripheral lip 106 of the inner peripheral pressing portion 108 of 102 is increased.
- the influence of plastic deformation of the outer peripheral lip 105 and / or the inner peripheral lip 106 (hereinafter also referred to as “lip 105, 106”) is reduced to maintain the sealing performance.
- the rigidity of the lips 105 and 106 is lowered, and the reaction force of the spring member 102 acts on the lips 105 and 106 greatly. Therefore, the contact state of the lips 105 and 106 varies. May occur.
- the circumferential distance (pitch interval) between the portions of the spring member 102 that come into contact with the lips 105 and 106 is large, and the lips 105 and 106 with which the spring member 102 comes into contact.
- the spring member 102 is manufactured by forming portions corresponding to the outer peripheral pressing portion 107 and the inner peripheral pressing portion 108 by punching a flat plate, and then bending the portions corresponding to the outer peripheral pressing portion 107 and the inner peripheral pressing portion 108.
- the In the punching process the width of the punched plate piece needs to be sufficiently wide (usually three times the thickness of the flat plate) with respect to the thickness of the flat plate to be processed.
- the pitch interval between the portions corresponding to the adjacent inner peripheral pressing portions 108 is increased by bending the portions corresponding to the inner peripheral pressing portions 108.
- the pitch interval of the inner peripheral pressing portions 108 is larger than the punching width necessary for the punching process, and the surface pressure of the contact portion of the inner peripheral lip 106 of the sealing device 100 varies. This may occur and the sealing performance of the inner peripheral lip 106 may deteriorate.
- the conventional sealing device 100 it is possible to suppress a decrease in the sealing performance of the inner peripheral lip 106 while suppressing a decrease in the sealing performance due to plastic deformation of the lip member 101 due to use at a high temperature.
- the present invention has been made in view of the above-described problems, and an object of the present invention is to provide a method for manufacturing a spring member of a sealing device capable of narrowing a pitch interval between inner peripheral pressing portions.
- a method of manufacturing a spring member of a sealing device is a method of manufacturing a spring member of a sealing device, wherein a circular space is formed by punching a circular portion from a plate material formed of a metal material.
- an inner circumference bending step of bending an inner portion from a base circle which is a circle between the inner circle end and the outer circle from the base circle to one side facing the plate material In the material, an inner peripheral radial portion that is a portion extending radially from the inner circle end portion to the inside of the outer circle is punched to divide the inner circle end portion, and each of the radiating pieces is inner than the outer circle.
- An inner periphery punching step for forming a cut extending to the inner periphery, and an outer periphery bending step for bending a portion outside the base circle from the base circle to the one side in the plate after the inner periphery punching step.
- the outer peripheral radial portion is radially outer at equal angular intervals outside the inner circular end.
- the radiation pieces are arranged at equiangular intervals.
- the inner peripheral radial portion is a portion that extends radially from the inner circle at equal angular intervals.
- the inner peripheral punching step in the inner peripheral punching step, the inner circular end portion and the radial piece of the portion to be punched in the radiation piece to form the cut
- the width is 1 mm or less.
- a portion punched in the radiating piece to form the notch has a width in the circumferential direction of the radiating piece. Located in the center.
- the inner circle punching step is performed together with the outer periphery punching step.
- the pitch interval between the inner peripheral pressing portions can be reduced.
- FIG.3 (a) is a perspective view of the intermediate
- FIG. 3B is a plan view of the intermediate plate formed by the inner peripheral bending process
- FIG. 3C is a cross-sectional view of the intermediate plate formed by the inner peripheral bending process along the axis.
- FIG. 4A is a diagram for explaining an inner peripheral punching process in the method for manufacturing a spring member according to the embodiment of the present invention
- FIG. 4A is a perspective view of an intermediate plate formed by the inner peripheral punching process
- FIG. 4B is a plan view of the intermediate plate formed by the inner peripheral punching process.
- FIG. 5A is a perspective view of the spring member formed by the outer periphery bending step, illustrating the outer periphery bending step in the method for manufacturing the spring member according to the embodiment of the present invention.
- FIG. 5 (c) is sectional drawing in the cross section along the axis line of the spring member formed by an outer periphery bending process. It is sectional drawing of the sealing device in the cross section along an axis line for showing a schematic structure of a sealing device provided with a spring member manufactured by a manufacturing method of a spring member of a sealing device concerning an embodiment of the invention. It is a fragmentary sectional view which shows schematic structure of the conventional sealing device. It is a perspective view for showing the schematic shape of the conventional spring member.
- FIG. 1 is a perspective view of a spring member for showing a schematic structure of a spring member manufactured by a method for manufacturing a spring member of a sealing device according to an embodiment of the present invention.
- a spring member 1 manufactured by a method for manufacturing a spring member of a sealing device according to an embodiment of the present invention is an annular member around an axis line x manufactured from a plate material formed from a metal material. It is.
- the spring member 1 includes a plurality of outer peripheral pressing portions 2 and a plurality of inner peripheral pressing portions 3.
- the outer peripheral pressing portions 2 are arranged in a ring around the axis x, and the inner peripheral pressing portion 3 Inside the pressing part 2, they are arranged in a ring around the axis line x.
- the outer peripheral pressing part 2 and the inner peripheral pressing part 3 are connected on one side (the lower side in FIG. 1) in the axis line x direction, and are integrated.
- the outer peripheral pressing portion 2 is inclined toward the outer peripheral side toward the other side (upper side in FIG. 1) in the axis line x
- the inner peripheral pressing portion 3 is inclined toward the inner peripheral side toward the other side in the axis line x. ing.
- the outer peripheral pressing portion 2 is, for example, positioned at equal angular intervals in the circumferential direction around the axis line x, and the interval (pitch interval) between adjacent outer peripheral pressing portions 2 is constant. .
- the outer peripheral pressing portion 2 has an edge (free edge 2a) on the other side located on or substantially on the circumference with the axis line x as the center or substantially the center.
- the inner circumferential pressing portion 3 is, for example, positioned at an equiangular interval in the circumferential direction around the axis line x, and the interval (pitch interval) between adjacent inner circumferential pressing portions 3 is constant. It has become.
- the inner peripheral pressing portion 3 has an edge (free edge 3 a) on the other side located on or approximately on the circumference with the axis x as the center or substantially the center.
- the spring member 1 is accommodated in an annular groove of a lip member formed of a resin material, and the outer peripheral pressing portion 2 presses the outer peripheral lip of the lip member.
- the inner peripheral pressing portion 3 contacts the inner peripheral lip to press the inner peripheral lip of the lip member.
- FIGS. 3A to 3C are diagrams for explaining an inner peripheral bending step in the method for manufacturing a spring member according to the present embodiment.
- (A), (b) is a figure for demonstrating the inner periphery punching process in the manufacturing method of the spring member which concerns on this Embodiment
- FIG. 5 (a), (b) is based on this Embodiment. It is a figure for demonstrating the outer periphery bending process in the manufacturing method of the spring member which concerns.
- a plate material a that is a plate material formed from a metal material is prepared, and punching is performed on the plate material a, as shown in FIG.
- An inner circle and outer circumference punching step for forming an intermediate plate material b by forming a side contour and a circular space on the inner circumference side are performed.
- the metal material of the plate material a include stainless steel.
- the plate material a is, for example, a flat plate material having a uniform or substantially uniform thickness.
- the inner circle and outer periphery punching process includes an inner circle punching process and an outer periphery punching process.
- a circular portion is punched from the plate material a to form an inner circle end portion 12 that is a portion that defines a circular space 11 that is a circular space.
- the outer side of the outer circle 13 (part a1), which is a circle on the outer side (outer peripheral side) of the inner circular end 12 from the plate material a, and the outer side radially outside the inner circular end 12
- the outer peripheral radial portion a2 which is a portion extending to the circle 13 is punched to form a plurality of radial pieces 14 which are radially arranged.
- the circular space 11 is a space surrounded by an inner circle 12a that is a circle centered on or substantially centered on an axis line x that is a line that is orthogonal or substantially orthogonal to the plane of the plate material a, and is an outer circle.
- Reference numeral 13 denotes a circle centered on or about the axis x including the inner circle 12a.
- the outer peripheral radial portion a2 is a portion formed by a plurality of outer peripheral radial portion pieces a3, and the outer peripheral radial portion piece a3 is from a circle centered on or substantially centered on the axis x outside the inner circle 12a. It is a portion extending in the radial direction to the outer circle 13.
- the plurality of outer peripheral radial portion pieces a3 are arranged at equiangular intervals or substantially equiangular intervals with the axis line x as the center.
- the outer peripheral radial piece a3 has a constant width in the direction perpendicular to the radial direction from the inner circle 12a to a predetermined position toward the outer side, and then expands toward the outer side. It has a shape that goes on.
- the radiating piece 14 is formed corresponding to the outer peripheral radial portion a2, and specifically extends outward from the inner circular end 12 along the radial direction, and has a width in a direction orthogonal to the radial direction, for example.
- the outer peripheral radial portion a2 has twelve outer peripheral radial portion pieces a3, and twelve radial pieces 14 are formed.
- the outer peripheral radial portion a2 is formed with the above-mentioned shape and the number of radiation pieces 14.
- the number and shape of the radiation pieces 14 are not limited to this, and in the sealing device, What is necessary is just the shape and number which press a lip member in the desired aspect. That is, the shape of the outer peripheral radial portion a2 to be punched is set corresponding to the shape and the number of the radiation pieces 14 to be formed.
- the inner circle punching step and the outer periphery punching step are performed, but the order in which the inner circle punching step and the outer periphery punching step are performed may be any order. That is, the inner circle punching step and the outer periphery punching step may be performed simultaneously, the inner circle punching step may be performed before the outer periphery punching step, and the inner circle punching step is performed after the outer periphery punching step. May be.
- FIG. 3 is a diagram for explaining the inner circumference bending process
- FIG. 3A is a perspective view of an intermediate plate c formed by the inner circumference bending process
- FIG. It is a top view of the intermediate board material c formed by a bending process
- FIG.3 (c) is sectional drawing in alignment with the axis line x of the intermediate board material c formed by an inner periphery bending process.
- a base circle 15 that is a circle between the inner circle end 12 and the outer circle 13 in the intermediate plate material b formed by the inner circle and outer circumference punching steps (FIGS. 2 and 3A).
- (B)) is bent to be bent from the base circle 15 to one side (in the direction of arrow x1 in FIG. 3A) facing the intermediate plate b (plate a).
- the inner side of the base circle 15 of the intermediate plate member b is formed so that the portion inside the base circle 15 of the intermediate plate member b has a nozzle shape protruding toward the x1 direction side.
- the part of is bent.
- the shape of the cross section along the axis x (hereinafter referred to as the cross-sectional shape) is the portion from the base circle 15 to the predetermined distance on the x1 side in the axis x. It is curved inwardly, and a portion on the x1 side from the portion of the predetermined distance is inclined linearly or substantially linearly with an inclination toward the axis x.
- the cross-sectional shape in a plane perpendicular to the axis x is a circle centered on the axis x or substantially in the center or a shape along the substantially circle.
- the diameter is reduced along the direction from the base circle 15 toward the x1 side, or a shape along a substantially circular shape.
- the portion on the x1 side with respect to the portion of the predetermined distance on the axis line x has a conical surface that is centered on the axis line x or extends toward the x1 side that is substantially centered, or a shape along the substantially conical surface. It has become.
- the outer peripheral pressing portion corresponding portion 16 which is a portion of the radiation piece 14 that is not bent to the x1 side by bending corresponds to the outer peripheral pressing portion 2 of the spring member 1 shown in FIG. 1 corresponds to the inner peripheral pressing portion 3 of the spring member 1 shown in FIG. 1.
- the inner circumferential pressing portion corresponding portion 17 is partially shaped to be conical or substantially conical, but the inner circumferential pressing portion corresponding portion 17 has a straight portion.
- the inner circumferential pressing portion corresponding portion 17 may have a shape along the tapered surface.
- FIG. 4 is a diagram for explaining the inner peripheral punching process
- FIG. 4 (a) is a perspective view of the intermediate plate material d formed by the inner peripheral punching process
- FIG. 4 (b) is an inner peripheral punching process. It is a top view of the intermediate board material d formed by a punching process.
- the inner peripheral radial portion 18 that is a portion extending radially from the inner circular end 12 is punched (FIG. 3 (b), FIG. b)), and punching is performed in each of the radiation pieces 14 to form an inner peripheral cut 19 that is a cut extending to the inner side of the outer circle 13.
- the inner peripheral radial portion 18 punched from the intermediate plate material c in the inner peripheral punching step is a portion composed of a portion removed from each radiation piece 14 because the inner peripheral cut 19 is formed.
- the inner circular end 12 Is a portion extending radially at equal angular intervals.
- the inner peripheral punching step the inner periphery extending along the axis x from the inner circle 12a to the position where it does not reach the outer circle 13 from the inner circle 12a to each radiation piece 14 of the intermediate plate c.
- a notch 19 is formed. That is, the inner peripheral cut 19 extends along the projection line of the radiation piece 14 of the axis x in each radiation piece 14.
- the portion of the inner peripheral radial portion 18 punched out in each radiation piece 14 extends from the inner peripheral pressing portion corresponding portion 17 to the outer peripheral pressing portion corresponding portion 16 in the radial piece 14, and in the outer peripheral pressing portion corresponding portion 16, It does not reach the outer peripheral end along the circle 13, but extends from the outer peripheral end to a position away from the inner peripheral side by a predetermined distance.
- the inner circumferential cut 19 is preferably formed in the radiation piece 14 so as to be located at the center of the width in the circumferential direction centering on the axis x (hereinafter also referred to as “circumferential direction”).
- the inner circumferential cut 19 preferably has a uniform width in the circumferential direction along the extending direction that is the direction along the projection line of the axis x described above. This is because the reaction force generated against the radial pressing in each radiation piece 14 can be made uniform over the circumferential width.
- each radiating piece 14 is extended to the center or substantially the center in the circumferential width of the radiating piece 14 by the inner peripheral punching process.
- An inner circumferential cut 19 having a uniform or substantially uniform width in the direction is formed.
- the circumferential width is not the same as or substantially the same as the circumferential width of other portions.
- the outer peripheral end of the inner peripheral cut 19 forms a contour drawing a curve, and in the present embodiment, a contour drawing a convex curve toward the outer periphery is formed. It has become.
- the inner peripheral radial portion 18 punched from the intermediate plate material c by the inner peripheral punching process has a shape corresponding to the inner peripheral cut 19 so that the above-described inner peripheral cut 19 is formed.
- the circumferential width of the inner peripheral cut 19 is, for example, 1 mm or less. That is, the inner circumferential radial portion 18 punched out in each radiation piece 14 has a circumferential pressing direction width of 1 mm or less.
- the width of the inner circumferential cut 19 in the circumferential direction is preferably as small as possible.
- the lower limit value of the circumferential width of the inner peripheral notch 19 depends on, for example, the ability of the device to perform punching in the inner peripheral punching process.
- FIG. 5 is a diagram for explaining the outer periphery bending step
- FIG. 5A is a perspective view of the spring member 1 formed by the outer periphery bending step
- FIG. It is a top view of the spring member 1 formed
- FIG.5 (c) is sectional drawing of the spring member 1 formed by an outer periphery bending process.
- the outer portion from the base circle 15 is on one side from the base circle 15 as in the inner periphery bending step. Bending is performed to bend in the direction of an arrow x1 (see FIGS. 3A and 5A).
- the intermediate plate material d is formed so that the outer peripheral pressing portion corresponding portion 16 which is a portion outside the base circle 15 of the intermediate plate material d has a trumpet shape protruding toward the x1 direction side.
- the outer peripheral pressing portion corresponding portion 16 outside the base circle 15 is bent.
- the cross-sectional shape of the outer peripheral pressing portion corresponding portion 16 (outer peripheral pressing portion 2) bent by the outer peripheral bending process is a portion from the base circle 15 to a predetermined distance on the x1 side in the axis line x.
- the outer peripheral pressing portion corresponding portion 16 of the intermediate member d is a circle or a substantially circular shape having a sectional shape in a plane orthogonal to the axis x on the axis x from the base circle 15 on the x1 side. In the axis x, the shape is along a circle or a substantial circle whose diameter increases from the base circle 15 toward the x1 side.
- the portion of the axis x that is closer to the x1 side than the portion of the predetermined distance has a shape that is conical or substantially conical with the axis x as the center or substantially the center.
- the outer periphery pressing portion 2 formed by bending the outer periphery pressing portion corresponding portion 16 is partly shaped along a conical surface or a substantially conical surface.
- the cross-sectional shape of the outer periphery pressing portion 2 is a straight portion.
- the outer peripheral pressing portion 2 may have a shape along the tapered surface.
- the spring member 1 shown in FIGS. 1, 5 (a) to (c) is manufactured by the method for manufacturing the spring member of the sealing device according to the embodiment of the present invention.
- the method of manufacturing the spring member of the sealing device according to the present embodiment as described above, before punching out the inner peripheral notch 19, the inner circle end 12 and the base circle of the radiating piece 14 in the inner peripheral bending step.
- the inner peripheral pressing portion corresponding portion 17 is formed by bending a portion inside 15, and then, in the inner peripheral punching process, the inner peripheral radial portion 18 of the radiation piece 14 is punched to form the inner peripheral cut 19.
- the inner peripheral pressing portion 3 is formed. That is, a portion corresponding to the inner peripheral pressing portion 3 is bent (see FIG.
- the pitch interval p which is the interval in the circumferential direction of the inner peripheral pressing portions 3 adjacent to each other in the spring member 1, is the inner periphery formed after the inner peripheral bending process in which the bending process from the flat plate is performed. It becomes the circumferential width of the cut 19.
- the inner peripheral cut 19 is not widened in the circumferential direction by bending or the like, and the pitch interval p of the inner peripheral pressing portion 3 can be made narrower than that of the conventional spring member. it can.
- the circumferential width of the inner circumferential cut 19 can be 1 mm or less, and the pitch interval p of the inner circumferential pressing portions 3 can be 1 mm or less.
- the pitch interval p between the inner peripheral pressing portions can be narrowed in the spring member of the sealing device.
- the punching or bending performed in the method for manufacturing the spring member of the sealing device according to the above-described embodiment of the present invention is performed by a conventionally known punching apparatus or a conventionally known bending process. Can be done by the device to do.
- a conventionally known punching apparatus or a conventionally known bending process can be done by the device to do.
- punching dies corresponding to the part a1 to be punched and the outer peripheral radial part a2 are used so that the inner circle end 12 and the radiation piece 14 are formed.
- a punching die corresponding to the inner peripheral radial portion 18 is used so that the inner peripheral cut 19 is formed.
- a bending die in which the outer peripheral pressing portion corresponding portion 16 is formed is used, and in the outer periphery bending step, a bending die in which the outer peripheral pressing portion 2 is formed is used.
- the manufacturing method of the spring member of the sealing device according to the above-described embodiment of the present invention can be performed by a conventionally known device as described above, and the method for manufacturing the spring member manufacturing method according to the present embodiment is as follows. Detailed description is omitted.
- the form of the spring member manufactured by the method for manufacturing the spring member of the sealing device according to the embodiment of the present invention is not limited to the form of the spring member 1 described above.
- the manufacturing method of the spring member of the sealing device according to the embodiment of the present invention can also be used to manufacture the spring member of another known sealing device.
- the spring member manufactured by the method for manufacturing a spring member of a sealing device according to the present invention is used for a sealing device attached to this space in order to seal an annular space between two members that can move relative to each other. Specifically, it is attached in an annular groove formed in a resin-made annular lip member included in the sealing device, and the lip of the lip member is inserted into the outer peripheral pressing portion 2 and the inner peripheral pressing portion 3 in a space for sealing. And press the lips against the two members to seal the space.
- a sealing device using a spring member manufactured by the method for manufacturing a spring member of a sealing device according to the present invention includes a reciprocating motion such as a shaft or a piston, a swinging or rotating motion member, and this motion. It is used to seal an annular space between a member such as a housing or a cylinder that covers the member on the outer peripheral side.
- a sealing device is used to seal a space between a shaft of an EGR valve and a housing as packing of an EGR valve disposed in a vehicle engine.
- FIG. 6 shows the sealing device 5 in a cross section along the axis x for showing a schematic configuration of the sealing device 5 including the spring member 1 manufactured by the method for manufacturing the spring member of the sealing device according to the above-described embodiment of the present invention.
- FIG. 6 shows the sealing device 5 in a cross section along the axis x for showing a schematic configuration of the sealing device 5 including the spring member 1 manufactured by the method for manufacturing the spring member of the sealing device according to the above-described embodiment of the present invention.
- the sealing device 5 includes a lip member 30 that is an annular member around an axis x formed of a resin material.
- the resin material of the lip member 30 include PTFE (polytetrafluoroethylene) and polyamide. More specifically, as the resin material of the lip member 30, PTFE containing a filler such as carbon fiber, glass fiber, or bronze powder can be suitably used.
- the lip member 30 includes a lip base portion 31, an outer peripheral lip 32, and an inner peripheral lip 33.
- the lip member 30 includes a lip member 30 from a high pressure side (right side in FIG. 6) to a low pressure side (left side in FIG. 6).
- the housing groove 34 is formed as an annular groove that is recessed in the upper part of FIG.
- the lip base 31 is an annular portion around the axis x. Specifically, as shown in FIG. 6, the lip base portion 31 has a cylindrical or annular shape with the axis line x as the center or substantially the center, and the cross-sectional shape is rectangular or substantially rectangular. .
- an end surface 31 a that is an end surface on the low pressure side is a hollow disk surface that extends on a plane that is orthogonal to or substantially orthogonal to the axis x.
- the cross-sectional shape of the lip base 31 may be other shapes such as other polygons and circles.
- the outer peripheral lip 32 is an annular lip that extends from the outer peripheral side to the high pressure side at the high pressure side end of the lip base 31, and is formed so that the outer peripheral side is in close contact with the housing in use.
- the outer peripheral side lip 32 has an annular shape with the axis line x as the center or substantially the center, and the outer peripheral side lip 32 is a convex portion convex toward the outer peripheral side.
- a certain lip tip 32a is formed.
- the width in the direction perpendicular to the axis line x (hereinafter also referred to as “radial direction”) at the lip tip 32 a is thicker than the radial width at the base of the lip base 31. Yes.
- the radial width of the outer peripheral lip 32 is, for example, 0.7 mm or less.
- the radial width of the outer peripheral lip 32 is thinner than the radial width of the inner peripheral lip 33. For this reason, the influence of the reaction force of the outer periphery pressing part 2 with respect to the outer peripheral side lip 32 can be enlarged, and the fall of the sealing performance by the plastic deformation of the outer peripheral side lip 32 can be suppressed.
- the radial width of the inner peripheral lip 33 may be thinner than the radial width of the outer peripheral lip 32.
- the influence of the reaction force of the inner peripheral pressing portion 3 on the inner peripheral lip 33 can be increased, and a decrease in sealing performance due to plastic deformation of the inner peripheral lip 33 can be suppressed.
- the radial width of the outer peripheral lip 32 and the radial width of the inner peripheral lip 33 are both thinner than the radial width of the outer peripheral lip or the inner peripheral lip of the conventional sealing device. Also good.
- the influence of the reaction forces of the outer peripheral pressing portion 2 and the inner peripheral pressing portion 3 on the outer peripheral lip 32 and the inner peripheral lip 33 can be increased, and the plasticity of the outer peripheral lip 32 and the inner peripheral lip 33 can be increased. A decrease in sealing performance due to deformation can be suppressed.
- the inner peripheral lip 33 is an annular lip extending from the inner peripheral side to the high pressure side at the high pressure side end of the lip base 31 and is formed so that the inner peripheral side is in close contact with the shaft so that the shaft can slide in use.
- the inner peripheral lip 33 has an annular shape centered on or approximately at the axis line x, and protrudes toward the inner peripheral side toward the inner peripheral side.
- a lip tip portion 33a which is a convex portion is formed.
- the inner peripheral lip 33 is formed with a projection 33b that is an annular portion that protrudes in the outer peripheral direction from the end portion on the high-pressure side on the inner peripheral surface. It functions as a retaining member for the spring member 1 accommodated in the member 34.
- the lip base 31, the outer peripheral lip 32, and the inner peripheral lip 33 are integrally formed from the same material, and the end surface on the high pressure side of the lip base 31 and the inner peripheral side of the outer peripheral lip 32 are formed.
- the peripheral surface and the peripheral surface on the outer peripheral side of the inner peripheral lip 33 define the above-described housing groove 34. That is, the end surface on the high pressure side of the lip base 31 forms a bottom surface 34 a that is the bottom surface of the housing groove 34, and the outer peripheral surface 34 b that the inner peripheral surface of the outer peripheral lip 32 is the outer peripheral surface of the housing groove 34.
- the outer peripheral surface of the inner peripheral lip 33 forms an inner peripheral surface 34c that is the inner peripheral surface of the receiving groove 34.
- the spring member 1 is housed in the housing groove 34 of the lip member 30.
- the spring member 1 has a joint portion between the outer peripheral pressing portion 2 and the inner peripheral pressing portion 3 seated (contacted) on the bottom surface 34 a of the receiving groove 34. 2 is in contact with the outer peripheral surface 34b of the receiving groove 34 at and near the free edge 2a, and the inner peripheral pressing portion 3 is in contact with the inner peripheral surface 34c of the receiving groove 34 at and near the free edge 3a.
- the outer peripheral pressing portion 2 of the spring member 1 has a length, an inclination angle, and the like so as to contact the outer peripheral surface 34b of the receiving groove 34 at a position facing the lip tip portion 32a of the outer peripheral lip 32 or in the vicinity thereof.
- the inner peripheral pressing portion 3 of the spring member 1 is in contact with the inner peripheral surface 34c of the receiving groove 34 at a position facing the lip tip portion 33a of the inner peripheral lip 33 or in the vicinity thereof. It is preferable that the length and the inclination angle are set.
- the outer peripheral pressing portion 2 and the inner peripheral pressing portion 3 are set to have a length in the extending direction and an inclination angle with respect to the axis x so as to generate a desired reaction force in use.
- the inclination angle of the outer peripheral pressing portion 2 is an angle at which the extending direction of the outer peripheral pressing portion 2 (projection line of the axis x to the outer peripheral pressing portion 2) is inclined with respect to the axis x, and the inner peripheral pressing portion 3
- the inclination angle is an angle at which the extending direction of the inner circumferential pressing portion 3 (projection line of the axis x on the inner circumferential pressing portion 3) is tilted with respect to the axis x.
- the protrusion 33b is formed at the high-pressure end of the inner peripheral lip 33.
- the protrusion 33b is a spring member as shown in FIG. 1 is located on the higher pressure side than the free edge 3 a of the inner peripheral pressing portion 3. For this reason, when the spring member 1 moves to the high pressure side in the accommodation groove 34, the free edge portion 3 a of the inner peripheral pressing portion 3 hits the projection portion 33 b of the inner peripheral lip 33, and the spring member 1 moves further to the high pressure side. Cannot move.
- the protrusion 33 b of the inner peripheral lip 33 functions as a stopper in the high-pressure side direction of the spring member 1.
- the protrusion 33 b may be provided on the outer peripheral lip 32.
- the protrusion 33b as a stopper may be provided on one or both of the outer peripheral lip 32 and the inner peripheral lip 33.
- the sealing device 5 In a use state where the sealing device 5 is attached to a member to be attached such as a shaft or a housing, the outer peripheral lip 32 and the inner peripheral lip 33 are pressed in directions approaching each other, and the outer peripheral pressing portion 2 and the inner peripheral pressing of the spring member 1 are pressed. The parts 3 are pressed in directions approaching each other.
- the outer peripheral lip 32 is pressed to the outer peripheral side in the radial direction by the reaction force of the outer peripheral pressing portion 2 against the inner peripheral side, and the attached member (for example, the opening of the housing) is pressed. Pressed.
- the inner peripheral lip 33 is pressed radially inward in the sealing device 5 by the reaction force against the outer peripheral pressing portion 3 of the inner peripheral pressing portion 3, and the attached member (for example, the shaft) is pressed. Pressed. In this way, the annular space of the attached portion is sealed.
- the pitch interval p of the inner peripheral pressing portion of the spring member can be made narrower than before.
- the pitch interval p of the inner peripheral pressing portion 3 of the spring member 1 is narrower than the conventional one, and the inner peripheral pressing portion 3 can contact the inner peripheral lip 33 in a wide range in the circumferential direction. Variations in the surface pressure at the lip tip 33a of the inner peripheral lip 33 that contacts the attached member can be suppressed, and the surface pressure at the lip tip 33a can be made uniform.
- sealing device 5 provided with spring member 1 manufactured by the manufacturing method of the spring member of the sealing device concerning an embodiment of the invention, sealing performance based on plastic deformation of lip member 30 by use under high temperature It is possible to suppress a decrease in the sealing performance of the inner peripheral lip 33 while suppressing a decrease in the above.
- the pitch interval p of the inner circumferential pressing portion 3 (the circumferential width of the inner circumferential cut 19) is smaller.
- the pitch interval p of the inner peripheral pressing portion 3 can be set to 1 mm or less.
- the configuration of the sealing device using the spring member manufactured by the method for manufacturing the spring member of the sealing device according to the embodiment of the present invention is not limited to the configuration of the sealing device 5 described above, and the embodiment of the present invention is used.
- the spring member manufactured by the manufacturing method of the spring member of the sealing device can be used for any applicable sealing device.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing With Elastic Sealing Lips (AREA)
Abstract
Description
2,107 外周押圧部
2a,3a 自由縁部
3,108 内周押圧部
5,100 密封装置
11 円空間
12 内円端部
12a 内円
13 外円
14 放射片
15 基円
16 外周押圧部対応部
17 内周押圧部対応部
18 内周放射状部分
19 内周切込
30,101 リップ部材
31,104 リップ基部
32,105 外周側リップ
32a,33a リップ先端部
33,106 内周側リップ
33b 突起部
34,103 収容溝
111 ハウジング
112 開口
113 軸
a 板材
a1 部分
a2 外周放射状部分
a3 外周放射状部分片
b,c,d 中間板材
p ピッチ間隔
Claims (6)
- 密封装置のバネ部材の製造方法であって、
金属材料から形成された板材から円部分を打ち抜いて円空間を画定する内円を有する内円端部を形成する内円打ち抜き工程と、前記板材から前記内円端部の外側の円である外円よりも外側の部分、及び前記内円端部よりも外側において放射状に前記外円まで延びる部分である外周放射状部分を打ち抜いて放射状に配列された複数の放射片を形成する外周打ち抜き工程とを有する内円及び外周打ち抜き工程と、
前記内円及び外周打ち抜き工程後の前記板材において、前記内円端と前記外円との間の円である基円から内側の部分を前記基円から前記板材の面する一方の側に曲げる内周曲げ工程と、
前記内周曲げ工程後の前記板材において、前記内円端部から前記外円よりも内側まで放射状に延びる部分である内周放射状部分を打ち抜いて前記内円端部を分断するとともに前記放射片の各々に前記外円よりも内側まで延びる切込を形成する内周打ち抜き工程と、
前記内周打ち抜き工程後の前記板材において、前記基円から外側の部分を前記基円から前記一方の側に曲げる外周曲げ工程とを備えることを特徴とする密封装置のバネ部材の製造方法。 - 前記内円及び外周打ち抜き工程において、前記外周放射状部分は、前記内円端部よりも外側において等角度間隔に放射状に前記外円まで延びる部分であり、前記放射片は、等角度間隔に配列されていることを特徴とする請求項1記載の密封装置のバネ部材の製造方法。
- 前記内周打ち抜き工程において、前記内周放射状部分は、前記内円から等角度間隔に放射状に延びる部分であることを特徴とする請求項1又は2記載の密封装置のバネ部材の製造方法。
- 前記内周打ち抜き工程において、前記切込を形成するために前記内円端部及び前記放射片において打ち抜かれる部分の周方向の幅は1mm以下であることを特徴とする請求項1乃至3のいずれか1項記載の密封装置のバネ部材の製造方法。
- 前記内周打ち抜き工程において、前記切込を形成するために前記放射片において打ち抜かれる部分は、前記放射片の周方向の幅の中央に位置していることを特徴とする請求項1乃至4のいずれか1項記載の密封装置のバネ部材の製造方法。
- 前記内円及び外周打ち抜き工程において、内円打ち抜き工程は外周打ち抜き工程と共に行われることを特徴とする請求項1乃至5のいずれか1項記載の密封装置のバネ部材の製造方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP17752900.5A EP3412374B1 (en) | 2016-02-18 | 2017-01-24 | Method for manufacturing spring member for sealing device |
CN201780010694.9A CN108602110B (zh) | 2016-02-18 | 2017-01-24 | 密封装置的弹簧构件的制造方法 |
JP2017523007A JP6172625B1 (ja) | 2016-02-18 | 2017-01-24 | 密封装置のバネ部材の製造方法 |
US16/102,794 US10737310B2 (en) | 2016-02-18 | 2018-08-14 | Method for manufacturing spring member of sealing device |
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JP2016-028620 | 2016-02-18 | ||
JP2016028620 | 2016-02-18 |
Related Child Applications (1)
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US16/102,794 Continuation US10737310B2 (en) | 2016-02-18 | 2018-08-14 | Method for manufacturing spring member of sealing device |
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WO2017141636A1 true WO2017141636A1 (ja) | 2017-08-24 |
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PCT/JP2017/002195 WO2017141636A1 (ja) | 2016-02-18 | 2017-01-24 | 密封装置のバネ部材の製造方法 |
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US (1) | US10737310B2 (ja) |
EP (1) | EP3412374B1 (ja) |
CN (1) | CN108602110B (ja) |
WO (1) | WO2017141636A1 (ja) |
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CN113385568A (zh) * | 2021-07-06 | 2021-09-14 | 广东欧特派环保材料科技有限公司 | 一种泛塞封弹簧冲压设备 |
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EP3736092A1 (en) * | 2019-05-08 | 2020-11-11 | Koninklijke Philips N.V. | Method of manufacturing a guard element for use in a hair-cutting unit |
TW202411554A (zh) * | 2022-05-19 | 2024-03-16 | 美商聖高拜塑膠製品公司 | 賦能元件及其製造及使用方法 |
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Also Published As
Publication number | Publication date |
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EP3412374A1 (en) | 2018-12-12 |
US20180354017A1 (en) | 2018-12-13 |
EP3412374B1 (en) | 2020-10-28 |
EP3412374A4 (en) | 2019-09-18 |
CN108602110B (zh) | 2019-11-05 |
US10737310B2 (en) | 2020-08-11 |
CN108602110A (zh) | 2018-09-28 |
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