CN110681767A - Inner ring hydraulic expanding mechanism - Google Patents
Inner ring hydraulic expanding mechanism Download PDFInfo
- Publication number
- CN110681767A CN110681767A CN201910977928.8A CN201910977928A CN110681767A CN 110681767 A CN110681767 A CN 110681767A CN 201910977928 A CN201910977928 A CN 201910977928A CN 110681767 A CN110681767 A CN 110681767A
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- Prior art keywords
- ring
- expanding
- ring expanding
- piece
- main
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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
- B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
- B21D31/04—Expanding other than provided for in groups B21D1/00 - B21D28/00, e.g. for making expanded metal
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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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
Abstract
An inner ring hydraulic expansion mechanism comprising: the ejector rod comprises an ejector rod body and an ejector rod seat, a plurality of pressure transmission surfaces which are arranged around a central axis at equal angles are processed on the conical surface of the ejector rod body, the ejector rod body of the ejector rod sequentially penetrates through the ring expanding piece installation seat and a central shaft hole of the main ring expanding die consisting of N main ring expanding pieces, each pressure transmission surface is in contact connection with two adjacent main diffusion pieces, and the ejection force of the push rod is finally converted into the ring expanding force of the inner steel ring; the outer side of the main ring expanding mould is provided with a secondary ring expanding mould, wherein the ring expanding sections of the main and secondary ring expanding moulds are composed of a plurality of fan-shaped plates with different sizes and ring expanding plates with different action sizes, so that the ring expanding requirements of inner steel rings with different sizes are met; the hydraulic expansion mechanism has a simplified integral structure and is easy to operate; the ring expanding force is transferred in a surface-to-surface mode, the ring expanding force is transferred uniformly, the service life of the equipment is prolonged, and the ring expanding qualified rate is high.
Description
Technical Field
The invention relates to the technical field of production equipment for gaskets, in particular to an inner ring hydraulic expansion mechanism.
Background
Gaskets are mechanical seals between two objects, typically to prevent pressure, corrosion, and natural thermal expansion and contraction of the tubing between the two objects. Since the machined surface may not be perfect, the irregularities can be filled using shims. Taking a gasket for a pipeline as an example, a metal graphite wound gasket is widely used in the field of pipeline joint sealing as a gasket with the best resilience in a semi-metal gasket, and comprises a metal graphite winding body formed by alternately winding a steel strip and various fillers (graphite, asbestos and tetrafluoro), steel rings arranged on inner and outer rings of the metal graphite winding body, and the maximum compression degree of the steel rings is controlled by using the inner and outer steel rings, wherein the inner steel ring with an in-place expanded ring is difficult to be installed in an extrusion manner with the inner ring wall of the metal graphite winding body, and the inner steel ring with an outer diameter smaller than the inner ring diameter of the metal graphite winding body is expanded to a set size until the outer wall of the inner steel ring and the inner wall of the metal graphite winding body are fixed in an extrusion manner. The equipment for ring expansion in the prior art has the following defects due to unreasonable structural design: firstly, the structure is complex, and the manufacturing cost is high; secondly, the expanded ring is stressed unevenly, so that the expanded ring is easy to scrap; and thirdly, the equipment for ring expansion has smaller stressed contact area, so that the rejection rate of the equipment is higher.
Disclosure of Invention
The invention relates to an inner ring hydraulic expansion mechanism which is used for solving one or more technical problems.
An inner ring hydraulic expansion mechanism comprising: the ejector rod, the main ring expanding die and the ring expanding piece mounting seat are connected with the power mechanism, the ejector rod comprises an ejector rod body and an ejector rod seat which are of an integral structure, the conical surface of the ejector rod body is provided with N pressure transmission surfaces which are arranged around the central axis at equal angles, a limiting edge is formed between the two adjacent pressure transmission surfaces, the main ring expanding die consists of N main ring expanding sheets, wherein, each main ring expanding piece is provided with an installation groove which has the same gradient with the limit edge and is matched with the limit edge towards the circle center side, the N main ring expanding sheets are enclosed into a main ring expanding die whole around the central axis direction, the main ring expanding die is limited in the ring expanding sheet mounting seat, the ejector rod body of the ejector rod sequentially passes through the ring expanding piece mounting seat and the central shaft hole of the main ring expanding die, and the ejector rod seat of the ejector rod is connected with ejection power equipment, wherein N is a natural number more than or equal to 3.
Preferably, the inner ring hydraulic expanding mechanism and the limiting edge are provided with chamfer structures.
Preferably, in the inner ring hydraulic expansion mechanism, the N main ring expansion pieces in the main ring expansion die are completely the same in shape and size, and the plate surface on one side in the mounting groove of each two adjacent main ring expansion pieces occupies half the area of the pressure transmission surface.
Preferably, inner ring hydraulic pressure expanding mechanism, every owner expands ring piece from bottom to top and includes spacing section, ring expanding section in proper order in the ring mould owner, expand the ring piece mount pad including expanding ring piece base, expanding the spacing C ring of ring piece, the spacing section setting in main ring mould bottom is expanding the bulge loop of ring piece base, spacing section outer lane diameter is less than the internal diameter size of bulge loop and is greater than the inner circle diameter size that two expand the circle that the spacing C ring 32 of ring piece enclosed and close and form, two expand the spacing C ring 32 spiral shell of ring piece and fix at the last face of bulge loop 311.
Preferably, inner ring hydraulic pressure expanding mechanism, still including being located spacing section, expand between the ring section and integrated into one piece's the section of replying in the ring piece is expanded to the owner, the outer disc processing of section of reseing has one or more integrated into one piece's rubber ring mounting groove, the section diameter size that resets is less than the spacing C inner ring diameter of ring piece that expands, and N owner expands and installs the rubber ring in the ring piece encloses synthetic whole circle rubber ring mounting groove.
Preferably, in the inner ring hydraulic expanding mechanism, the ring expanding section in the main ring expanding piece comprises a plurality of step-shaped sector surfaces with successively increasing diameters from top to bottom.
Preferably, the inner ring hydraulic expanding mechanism is provided with handles at two ends of the expanding ring piece base.
Preferably, the inner ring hydraulic expanding mechanism further comprises a secondary ring expanding die and a secondary ring expanding die tray which have similar structures with the main ring expanding die, the secondary ring expanding die consists of N secondary ring expanding sheets, a bottom end circular plate of the secondary ring expanding die is arranged on the upper plate surface of the secondary ring expanding die tray, a first fixed blind hole is processed at a parting line position in the bottom end plate of the secondary ring expanding sheet, correspondingly, a countersunk kidney-shaped through hole is processed on the secondary ring expanding die tray right below the first fixed blind hole, the N countersunk kidney-shaped through holes are arranged at equal angles along the direction of the central axis of the secondary ring-expanding die tray, the length of the countersunk kidney-shaped through holes extends in the direction parallel to the diameter of the corresponding position, the bolts respectively penetrate through the countersunk kidney-shaped through holes and the first fixed blind holes, a step-shaped fan-shaped profiling structure matched with the step-shaped fan-shaped surface in the main ring expanding piece is processed on the inner side surface of each secondary ring expanding piece, and each secondary ring expanding piece is installed on the outer side of the step-shaped fan-shaped surface of the corresponding main ring expanding piece in a buckling mode; the diameters of the inner steel rings which can be acted by the main ring expanding die and the secondary ring expanding die are different.
Preferably, the inner ring hydraulic expanding mechanism, the bottom end circular plate of the secondary expanding ring piece is provided with two second fixed blind holes which are symmetrically distributed on two sides of the bottom middle branching line, a return spring is fixed between two adjacent secondary expanding ring pieces, and two ends of the length of the return spring are respectively fixedly connected with the second fixed blind holes of the adjacent secondary expanding ring pieces.
Preferably, the inner ring hydraulic expansion mechanism: n is 6 to 10, and preferably N is 8.
Description of the drawings:
the embodiments are further described with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of the inner ring hydraulic expansion mechanism according to the present invention in a partial cross-section in overall configuration;
FIG. 2 is a schematic structural diagram of a main ring expanding sheet in the inner ring hydraulic expanding mechanism according to the present invention;
FIG. 3 is a schematic structural diagram of a secondary expanding ring piece in the inner ring hydraulic expanding mechanism according to the present invention;
FIG. 4 is a schematic view of a portion of the inner ring hydraulic expanding mechanism according to the present invention;
FIG. 5 is a schematic structural diagram of a mandril in the inner ring hydraulic expansion mechanism related to the invention;
the specific structure corresponding to the number is as follows:
a top rod 1, a top rod body 11, a pressure transmission surface 111, a limit edge 112, a top rod seat 12, a main ring expanding die 2, a main ring expanding sheet 21, a mounting groove 211, a limit section 212, a ring expanding section 213, a return section 214, a rubber ring mounting groove 2141, a ring expanding sheet mounting seat 3, a ring expanding sheet seat 31, a convex ring 311, a ring expanding sheet limit C ring 32, a secondary ring expanding die 4, a secondary ring expanding sheet 41, a first fixed blind hole 411, a second fixed blind hole 412, a secondary ring expanding die tray 5, a countersunk head kidney-shaped through hole 51,
the following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
Specific embodiment example 1:
in this embodiment, N is 8.
An inner ring hydraulic expansion mechanism comprising: the ejector rod 1, the main ring expanding die 2 and the ring expanding piece mounting seat 3 are connected with a power mechanism, the ejector rod 1 comprises an ejector rod body 11 and an ejector rod seat 12 which are of an integral structure, eight pressure transmission surfaces 111 which are arranged around the central axis at equal angles are processed on the conical surface of the ejector rod body 11, a limiting edge 112 is formed between two adjacent pressure transmission surfaces 111, the main ring expanding die 2 is composed of eight main ring expanding sheets 21, wherein, each main ring expanding piece 21 is provided with a mounting groove 211 which has the same gradient with the spacing edge 112 and is matched with the spacing edge 112 towards the circle center side, the eight main ring expanding sheets 21 are enclosed into a whole of a main ring expanding die 2 around the central axis direction, the main ring expanding die 2 is limited in the ring expanding sheet mounting seat 3, the ejector rod body 11 of the ejector rod 1 sequentially penetrates through the ring expanding piece mounting seat 3 and the central shaft hole of the main ring expanding die 2, and the ejector rod seat 12 of the ejector rod 11 is connected with a hydraulic cylinder; eight main ring expanding pieces 21 in the main ring expanding die 2 are identical in shape and size, and one side plate surface in the installation groove 21 of each two adjacent main ring expanding pieces 21 respectively occupies half the area of the pressure transmission surface 111.
The working principle is as follows: under the original state that jacking rod 1 was not jacked, every main ring piece 21 both sides face of expanding mutually contradicts in the main ring mould 2 that expands, and ejector pin 1 rises and the pressure transmission face 111 of the in-process slope that rises under the power equipment effect can transmit the jacking force for peripheral main ring piece 21 that expands, main ring piece 21 that expands can move towards centre of a circle position back of the body and enlarge diameter size gradually, and the interior steel ring of noosing on main ring mould 2 receives outside expansion force, and along with continuous expansion force effect, the gradual grow of interior steel ring internal diameter is until fixed with the interior ring extrusion formula of metal graphite winding. The inner ring expanding mechanism related to the invention has simple structure, and the pressure transmission surface 111 in the ejector rod body 11 has the following three functions: firstly, in the pushing and expanding process, under the limiting action of an octahedral centrum, the main ring expanding die 2 and the ejector rod body 11 cannot rotate relatively, and the main ring expanding die 2 is limited and guided; in the ejection and expansion process, the eight pressure transmission surfaces 111 in the ejector rod body 11 are in surface-to-surface contact with the main ring expanding die mounting groove 211 all the time, so that the ejection force of the ejector rod can be converted into the ring expanding force of the inner steel ring to the maximum extent, and the operation efficiency is high; and thirdly, the traditional point and line contact mode is replaced, the pressure is reduced, the damage rate of the equipment is reduced, and the service life of the equipment is prolonged.
Alternatively, the stopper rib 112 is provided with a chamfered structure. After the limiting edges 112 are chamfered, structural damage caused by stress concentration can be avoided on the basis of finishing the limiting function.
Further, every owner expands ring piece 21 from bottom to top and includes spacing section 212, expands ring section 213 in proper order, expand ring piece mount pad 3 including expand ring piece base 31, expand the spacing C ring 32 of ring piece, main expand ring mould 2 bottom spacing section 212 setting in expanding the bulge loop 311 of ring piece base 31 just the internal diameter size of bulge loop 311 is greater than spacing section 212 outer lane diameter, two expand the spacing C ring 32 spiral shell of ring piece and fix on the last face of bulge loop 311, the inner circle diameter size that two expand the circle that ring piece spacing C ring 32 enclose to close and form is less than spacing section 212 outer lane diameter. The limiting section 212 is limited in a space formed by enclosing the bottom surface of the convex ring 311 and the lower plate surface of the ring expanding piece limiting C ring 32 to perform radial expansion movement, and the inner diameter of the convex ring 311 limits the overall expansion distance of the main ring expanding die 2; on the premise of the same jacking speed, the bus inclination of the cone where the ejector rod body 11 is located controls the outward-expanding deformation degree; the difference between the inner diameter of the convex ring 311 and the outer wall diameter of the limiting section 212 and the inclination of the generatrix of the cone where the mandril body 11 is located control the ring expanding movement together.
Further, still including being located between spacing section 212, the ring expanding section 213 and integrated into one piece's return section 214 in the main ring expanding piece 21, the outer disc processing of return section 214 has one or more integrated into one piece's rubber circle mounting groove 2141, return section 214 diameter size is less than the spacing C of ring expanding piece ring 32 inner ring diameter, installs the rubber circle in eight main ring expanding pieces 21 enclose synthetic whole circle rubber circle mounting groove 2141. The rubber ring is arranged to help automatic homing after ring expanding operation. The ring expanding section 213 of the main ring expanding segment 21 comprises a plurality of step-shaped sectors with successively larger diameters from top to bottom. The ring expanding device is suitable for ring expanding operation of steel rings in multiple sizes, and has multiple functions.
Specific embodiment example 2:
on the basis of the specific embodiment 1, the following technical characteristics are added:
the inner ring hydraulic expanding mechanism further comprises a secondary ring expanding die 4 and a secondary ring expanding die tray 5 which are similar to the main ring expanding die 2 in structure, wherein the secondary ring expanding die 4 is composed of eight secondary ring expanding pieces 41, the bottom end circular plate of the secondary ring expanding die 4 is arranged on the upper plate surface of the secondary ring expanding die tray 5, a first fixed blind hole 411 is machined in the middle line position of the bottom end plate of each secondary ring expanding piece 41, a corresponding countersunk head waist-shaped through hole 51 is machined in the secondary ring expanding die tray 5 right below the first fixed blind hole 411, the eight countersunk head waist-shaped through holes 51 are equiangularly arranged along the central axis direction of the secondary ring expanding die tray 5, the length of each countersunk head waist-shaped through hole extends in the diameter direction parallel to the corresponding position, bolts respectively penetrate through the countersunk head waist-shaped through holes 51 and the first fixed blind holes 411, a fan-shaped copying structure matched with a stepped fan-shaped surface in the main ring expanding piece 21 is machined on the inner side surface of each secondary ring, each secondary ring expanding piece 41 is arranged on the outer side of the stepped sector surface of the corresponding main ring expanding piece 21 in a buckling mode; the diameters of the inner steel rings which can be acted by the main ring expanding die 2 and the secondary ring expanding die 4 are different.
The secondary ring expanding die 4 indirectly bears the ejection force of the push rod 1 through the main ring expanding die 2 and further converts the ejection force into the ring expanding force of the inner steel ring, and the length dimension of the countersunk head kidney-shaped through hole 51 is the maximum ring expanding dimension of the diameter; the size application scope of steel ring diameter in inferior ring expanding mould 4's setting can further be expanded, and is the wholeness structure through bolted connection between a plurality of inferior ring expanding pieces 41 and inferior ring expanding mould tray 5, can realize once only installing or demolising with main ring expanding mould 2, convenient operation. In the installation and use processes of the main ring expanding die and the secondary ring expanding die, the step-shaped sector areas with the diameters gradually increased on the inner side of the secondary ring expanding die 4 are at least two surfaces which are attached to the corresponding step-shaped sector areas on the outer side of the main ring expanding die in size, and quick disassembly and replacement can be realized.
Further, two second fixing blind holes 412 are formed in a bottom end circular plate of each secondary expanded ring piece 41, the two second fixing blind holes 412 are symmetrically distributed on two sides of the bottom middle dividing line, a return spring is fixed between every two adjacent secondary expanded ring pieces 41, and two length ends of the return spring are fixedly connected with the second fixing blind holes 412 of the adjacent secondary expanded ring pieces 41 respectively.
The secondary ring expanding die 4 is connected with each other through the return springs, so that the automatic returning phenomenon after ring expanding is finished is realized.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An inner ring hydraulic expansion mechanism comprising: ejector pin, main ring mould, ring piece mount pad of expanding that are connected with power unit, the ejector pin includes ejector pin body, ejector pin seat, its characterized in that of an organic whole structure: the main ring expanding die comprises N main ring expanding sheets, wherein each main ring expanding sheet is provided with a mounting groove which is the same as the inclination of the limiting edge and is mounted in a matched mode with the limiting edge towards the circle center side, the N main ring expanding sheets surround the central axis direction to form the whole main ring expanding die, the main ring expanding die is limited in a ring expanding sheet mounting seat, a push rod body of the push rod sequentially penetrates through a ring expanding sheet mounting seat and a central shaft hole of the main ring expanding die, a push rod seat of the push rod is connected with a push-up power device, and N is a natural number greater than or equal to 3.
2. The inner ring hydraulic expansion mechanism of claim 1, wherein: the limiting edge is provided with a chamfer structure.
3. The inner ring hydraulic expansion mechanism of claim 1, wherein: the N main ring expanding pieces in the main ring expanding die are identical in shape and size, and the plate surfaces on one sides in the installation grooves of two adjacent main ring expanding pieces respectively occupy half the area of a pressure transmission surface.
4. The inner ring hydraulic expansion mechanism of claim 1, wherein: every main ring expanding piece includes spacing section, ring expanding section from bottom to top in proper order in the main ring expanding mould, ring expanding piece mount pad is including expanding ring piece base, expanding the spacing C ring of ring piece, main ring expanding mould bottom spacing section sets up the bulge loop at ring expanding piece base, spacing section outer lane diameter is less than the internal diameter size of bulge loop and is greater than the inner circle diameter size of the circle that two ring piece spacing C rings 32 enclose to close and form, two expand the spacing C ring 32 spiral shell of ring piece and fix at the last face of bulge loop 311.
5. The inner ring hydraulic expansion mechanism of claim 4, wherein: still including being located spacing section, expanding between the ring section and integrated into one piece's the section of replying in the ring piece is expanded to the owner, the outer disc processing of the section of restoring has one or more integrated into one piece's rubber circle mounting groove, the section diameter size that resets is less than the spacing C intra-annular diameter of ring piece, and N owner expands and install the rubber circle in the ring piece encloses synthetic whole circle rubber circle mounting groove.
6. The inner ring hydraulic expansion mechanism of claim 4, wherein: the ring expanding section in the main ring expanding sheet comprises a plurality of step-shaped fan-shaped surfaces with diameters gradually increased from top to bottom.
7. The inner ring hydraulic expansion mechanism of claim 4, wherein: handles are arranged at two ends of the ring expanding sheet base.
8. The inner ring hydraulic expansion mechanism as claimed in any one of claims 1 to 4, wherein: also comprises a secondary ring expanding die and a secondary ring expanding die tray which have similar structures with the main ring expanding die, wherein the secondary ring expanding die is composed of N secondary ring expanding sheets, the bottom end circular plate of the secondary ring expanding die is arranged on the upper plate surface of the secondary ring expanding die tray, a first fixed blind hole is processed at the midline position in the bottom end plate of the secondary ring expanding sheet, correspondingly, a countersunk kidney-shaped through hole is processed on the secondary ring expanding die tray right below the first fixed blind hole, the N countersunk kidney-shaped through holes are arranged at equal angles along the direction of the central axis of the secondary ring-expanding die tray, the length of the countersunk kidney-shaped through holes extends in the direction parallel to the diameter of the corresponding position, the bolts respectively penetrate through the countersunk kidney-shaped through holes and the first fixed blind holes, a step-shaped fan-shaped profiling structure matched with the step-shaped fan-shaped surface in the main ring expanding piece is processed on the inner side surface of each secondary ring expanding piece, and each secondary ring expanding piece is installed on the outer side of the step-shaped fan-shaped surface of the corresponding main ring expanding piece in a buckling mode; the diameters of the inner steel rings which can be acted by the main ring expanding die and the secondary ring expanding die are different.
9. The inner ring hydraulic expansion mechanism of claim 8, wherein: the bottom end circular plate of the secondary ring expanding piece is provided with two second fixed blind holes which are symmetrically distributed on two sides of the bottom surface middle branching line, a return spring is fixed between every two adjacent secondary ring expanding pieces, and two length ends of the return spring are fixedly connected with the second fixed blind holes of the adjacent secondary ring expanding pieces respectively.
10. The inner ring hydraulic expansion mechanism of claim 1, wherein: n is 6-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910977928.8A CN110681767A (en) | 2019-10-15 | 2019-10-15 | Inner ring hydraulic expanding mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910977928.8A CN110681767A (en) | 2019-10-15 | 2019-10-15 | Inner ring hydraulic expanding mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN110681767A true CN110681767A (en) | 2020-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910977928.8A Pending CN110681767A (en) | 2019-10-15 | 2019-10-15 | Inner ring hydraulic expanding mechanism |
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| CN (1) | CN110681767A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117816834A (en) * | 2024-03-05 | 2024-04-05 | 成都德安金属制品有限公司 | Punching device for annular workpiece |
-
2019
- 2019-10-15 CN CN201910977928.8A patent/CN110681767A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117816834A (en) * | 2024-03-05 | 2024-04-05 | 成都德安金属制品有限公司 | Punching device for annular workpiece |
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