CN103722528A - Blank cap expander and expansion method - Google Patents
Blank cap expander and expansion method Download PDFInfo
- Publication number
- CN103722528A CN103722528A CN201310646177.4A CN201310646177A CN103722528A CN 103722528 A CN103722528 A CN 103722528A CN 201310646177 A CN201310646177 A CN 201310646177A CN 103722528 A CN103722528 A CN 103722528A
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- China
- Prior art keywords
- stifle
- expansion device
- bar
- taper type
- dilates
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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
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Time Recorders, Dirve Recorders, Access Control (AREA)
Abstract
The invention discloses a blank cap expander. The blank cap expander comprises a cover plate, an expander body, an expansion rod and three frustum-shaped balls. Three axial grooves matched with the peripheral surfaces of the frustum-shaped balls are evenly distributed in a shaft neck of the expander body. An expansion rod frustum is arranged at the lower end of the expansion rod, the expansion rod is in threaded connection with the expander body, the three frustum-shaped balls are embedded into the axial grooves in the lower end of the expander body respectively, and the conical surfaces of the expansion rod frustum make linear contact with the conical surfaces of the three frustum-shaped balls. The invention further discloses an expansion method. The method includes the following steps of embedding a blank cap, reversely rotating the expansion rod to make the expander enter the blank cap, positively rotating the expansion rod, and evenly squeezing the edge of an upper opening of the blank cap into a radial conical groove of a base auxiliary hole. The blank cap expander is simple in structure, low in maintenance cost and long in service life. The expansion method saves time and labor in the operating process, and is convenient to conduct. The blank cap is firmly connected with the wall of the auxiliary hole and cannot disengage, and therefore sealing performance of the base auxiliary hole is improved.
Description
Technical field
The present invention relates to a kind of plugging device of cylindrical hole, relate in particular to a kind of stifle edge of shutoff cylindrical hole that makes and dilate the rear expansion device being fixedly connected with hole, also relate to the method that dilates of this expansion device, belong to specific purpose tool technical field.
Background technology
The support of plant equipment, frame, seal chamber need to be specially provided with some fabrication holes according to processing, need shutoff sealing after completion of processing.As the cylinder cap of the marine diesel of cast iron quality, casing, contour structures is complicated, compact, inside establishes cleannes and requires high tortuous lubricating cavity, cooling water cavity.After machining finishes, these be must block and processing or fabrication hole clean and that arrange are specifically designed to, it is U-shaped stifle shutoff that this class fabrication hole is used cross section, stifle adopts good No. 20 mild steel of plasticity stamping.When stifle is installed, must use the special instrument that dilates to push the edge suitable for reading of stifle, make in radial tapered groove of its embedding fabrication hole, reach and both block the object that fabrication hole can also sealing technology hole.It is not long that existing stifle dilates tool construction complexity, inconvenient maintenance and service life, has a strong impact on the operating efficiency of fuselage, rack.
Summary of the invention
The object of this invention is to provide a kind of easy to process, simple to operate, good sealing effect, maintenance cost is low and the stifle of long service life dilates specific purpose tool and dilate method, improves technique through hole shutoff sealing effectiveness.
The present invention is achieved by the following technical programs:
A kind of stifle expansion device, comprise cover plate, expansion device body, dilate bar and three taper type balls, expansion device body center is provided with axially extending bore, axially extending bore through expansion device body one end is shaped with internal thread, after expansion device body other end reduced diameter, extend this expansion device body axle journal, uniform three axial grooves that mate with taper type ball outer peripheral face on described expansion device body axle journal; Dilating the bar other end is the diminishing bar frustum that dilates of diameter, dilates bar middle part and is provided with external screw thread, dilates bar one end and is shaped with polygon shank; Dilate bar and expansion device body is threaded connection, three taper type ball difference embedding shapes are in the axial groove of the expansion device body other end, cover plate is fixedly connected with expansion device body axle journal, the large end end face of taper type ball is resisted against on cover plate medial surface, taper type ball small end end face is resisted against on the bottom land of axial groove, dilates the bar frustum conical surface and contacts with three taper type ball conical surface lines.
Object of the present invention further realizes by the following technical programs.
Aforesaid stifle expansion device, the wherein said bar frustum that dilates is identical with the tapering of taper type ball, is 1:12～1:8; Dilate between bar frustum end face and cover plate medial surface and leave gap delta 1; Between taper type ball and axial groove, leave gap delta 2; The described bar that dilates is connected by fine thread with expansion device body; Described cover plate central authorities are provided with aperture and are greater than the through hole that dilates shank diameter.
The method that dilates of stifle expansion device, comprises the following steps:
1) stifle that is U-shaped by cross section embeds in the frame fabrication hole that needs to stop up, until the large end end face of the outer end end face of stifle and the radial tapered groove of support fabrication hole is concordant;
2) by stifle expansion device axis perpendicular to stifle end face, make the cover plate of the stifle expansion device other end aim at stifle; Then with spanner, rotate backward the polygon shank that dilates bar one end, dilate bar and move up; Stifle internal orifice edge promotes at least three taper type balls and moves to stifle center position, until stifle expansion device enters in stifle, the large end side surface of taper type ball is resisted against on the internal orifice edge of stifle;
3) by spanner forward rotation, dilate polygon shank several weeks of bar one end, dilating bar moves down, forward rotation dilate bar frustum, three taper type balls that promotion is in contact with it, limit is around the reverse rotation of taper type ball axis, move towards footpath, stifle edge suitable for reading direction on limit, until three taper type balls rotate several weeks, the edge suitable for reading of stifle is evenly squeezed in the radial tapered groove of support fabrication hole;
4) with spanner, again rotate backward the polygon shank that dilates bar one end, take out stifle expansion device.
Stifle expansion device of the present invention is simple in structure, maintenance cost is low, good sealing effect, long service life.Stifle edge suitable for reading after dilating evenly squeezes in the radial tapered groove of support fabrication hole, and stifle and fabrication hole hole wall are connected firmly and can come off, and has improved the sealing of support fabrication hole.The method that dilates of the present invention operates save trouble and labor conveniently, only need to dilate bar and rotate a few, at swollen device body and dilate under the gearing of fine thread between bar, dilating axial force that bar moves down makes to dilate and between bar frustum and the taper type ball conical surface, produces the normal direction normal pressure that is several times as much as axial force, the taper type ball that promotes three rotations moves radially towards stifle edge suitable for reading separately, thereby the horizontal component of normal direction normal pressure evenly squeezes into the edge suitable for reading of stifle in the radial tapered groove of support fabrication hole and completes dilating of stifle, stifle dilates conveniently, fast, improved operating efficiency.
Advantage and disadvantage of the present invention, the non-limitative illustration by preferred embodiment below is for illustration and explanation, and these embodiment, only provide as an example with reference to accompanying drawing.
Accompanying drawing explanation
Fig. 1 is that stifle expansion device of the present invention completes the schematic diagram that stifle dilates;
Fig. 2 is the A-A cutaway view of Fig. 1.
The specific embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As depicted in figs. 1 and 2, the stifle expansion device of the present embodiment comprises cover plate 1, expansion device body 2, dilates bar 3 and three taper type balls 4, expansion device body 2 centers are provided with axially extending bore 21, axially extending bore 21 through expansion device body 2 one end is shaped with closely-pitched internal thread 211, after expansion device body 2 other end reduced diameter, extend expansion device body axle journal 22, uniform three axial grooves 221 that mate with taper type ball 4 outer peripheral faces on described expansion device body axle journal 22.Dilating bar 3 other ends is the diminishing bar frustum 31 that dilates of diameter, dilates bar 3 middle parts and is provided with closely-pitched external screw thread, dilates bar 3 one end and is shaped with and is convenient to the square shank 32 that Wrench head blocks, and dilates bar 3 and is connected by fine thread with expansion device body 2.Three taper type ball 4 difference embedding shapes are in the axial groove 221 of expansion device body 2 other ends.As shown in Figure 2, between taper type ball 4 and axial groove 221, leave gap delta 2, make taper type ball 4 in the interior movement of axial groove 221, to be convenient to dilating of stifle 5.Cover plate 1 is fixedly connected with by several screws with expansion device body axle journal 22, the large end end face 41 of taper type ball is resisted against on cover plate 1 medial surface, taper type ball small end end face 42 is resisted against on the bottom land of axial groove 221, dilates bar frustum 31 conical surfaces and contacts with three taper type balls, 4 conical surface lines.
Dilate bar frustum 31 identical with the tapering of taper type ball 4, be 1:12～1:8, the present embodiment is 1:10.Small Taper dilate the normal direction normal pressure producing between bar frustum 31 and the contact-making surface of taper type ball 4, promote the taper type ball 4 that 3 one group be tightly centered around dilate bar frustum 31 and outwards moved and dilated stifle 5.Dilate between bar frustum 31 end faces and cover plate 1 medial surface and leave gap delta 1, making to dilate bar 3 has enough spaces that moves down, and guarantees to dilate bar frustum 31 and contacts closely with taper type ball 4 conical surfaces.Cover plate 1 central authorities are provided with aperture and are greater than the through hole 11 that dilates bar 3 diameters, dilate like this stroke that bar 3 can increase cover plate 1 thickness, dilate bar 3 end faces simultaneously and can not push up bad cover plate 1.Even if top is to stifle 5 bottoms, reaction force can make the present invention's micro-moving back automatically, facts have proved, can improve the sealing effectiveness of stifle 5.
The method that dilates of the present embodiment, comprises the following steps:
1) stifle that is U-shaped by cross section 5 embeds in the booster support fabrication hole 6 of the marine diesel that needs obstruction, until the outer end end face of stifle 5 is concordant with the large end end face of the radial tapered groove 61 of booster support fabrication hole 6.
2) by stifle expansion device axis perpendicular to stifle 5 end faces, make the cover plate 1 of the stifle expansion device other end aim at stifle, then with spanner, rotate backward the square shank 32 that dilates bar one end, dilate bar 3 and move up; Stifle 5 internal orifice edges promote three taper type balls 4 and move to stifle center position, until stifle expansion device enters in stifle 5, the large end side surface of taper type ball 4 is resisted against on the internal orifice edge of stifle 5.
3) by spanner forward rotation, dilate the square shank 32 1 weeks of bar 3 one end, dilating bar 3 moves down, move towards stifle 5 edge direction suitable for reading around the taper type ball reverse rotation of 4 axis limit on three limits that bar frustum 31 promotes to be in contact with it that dilate of forward rotation, until three taper type balls 4 rotate one week, the edge suitable for reading of stifle 5 is evenly squeezed in the radial tapered groove 61 of booster support fabrication hole 6 of marine diesel, after the stifle 5 of the present embodiment dilates, its edge suitable for reading outside diameter has increased 1mm.
4) with spanner, again rotate backward the square shank 32 that dilates bar 3 one end, take out stifle expansion device.
The present invention can increase the quantity of taper type ball 4 according to the different size of stifle 5, to reach good stifle, dilates effect.
In addition to the implementation, the present invention can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of requirement of the present invention.
Claims (7)
1. a stifle expansion device, it is characterized in that, comprise cover plate, expansion device body, dilate bar and at least three taper type balls, expansion device body center is provided with axially extending bore, axially extending bore through expansion device body one end is shaped with internal thread, after expansion device body other end reduced diameter, extend this expansion device body axle journal, uniform three axial grooves that mate with taper type ball outer peripheral face on described expansion device body axle journal; Dilating the bar other end is the diminishing bar frustum that dilates of diameter, dilates bar middle part and is provided with external screw thread, dilates bar one end and is shaped with polygon shank; Dilate bar and expansion device body is threaded connection, three taper type ball difference embedding shapes are in the axial groove of the expansion device body other end, cover plate is fixedly connected with expansion device body axle journal, the large end end face of taper type ball is resisted against on cover plate medial surface, taper type ball small end end face is resisted against on the bottom land of axial groove, and expansion device body dilates the bar frustum conical surface and contacts with three taper type ball conical surface lines.
2. stifle expansion device as claimed in claim 1, is characterized in that, dilates bar frustum identical with the tapering of taper type ball, is 1:12～1:8.
3. stifle expansion device as claimed in claim 1, is characterized in that, dilates between bar frustum end face and cover plate medial surface and leaves gap delta 1.
4. stifle expansion device as claimed in claim 1, is characterized in that, leaves gap delta 2 between taper type ball and axial groove.
5. stifle expansion device as claimed in claim 1, is characterized in that, described in dilate bar and be connected by fine thread with expansion device body.
6. stifle expansion device as claimed in claim 1, is characterized in that, described cover plate central authorities are provided with aperture and are greater than the through hole that dilates shank diameter.
7. the method that dilates of stifle expansion device as claimed in claim 1, is characterized in that, comprises the following steps:
The stifle that is U-shaped by cross section embeds in the frame fabrication hole that needs to stop up, until the large end end face of the outer end end face of stifle and the radial tapered groove of support fabrication hole is concordant;
Perpendicular to stifle end face, make the cover plate of the stifle expansion device other end aim at stifle in stifle expansion device axis; Then with spanner, rotate backward the polygon shank that dilates bar one end, dilate bar and move up; Stifle internal orifice edge promotes three taper type balls and moves to stifle center position, until stifle expansion device enters in stifle, the large end side surface of taper type ball is resisted against on the internal orifice edge of stifle;
By spanner forward rotation, dilate polygon shank several weeks of bar one end, dilating bar moves down, move towards stifle edge direction suitable for reading around the reverse rotation of taper type ball axis limit on three the taper type ball limits that bar frustum promotes to be in contact with it that dilate of forward rotation, until three taper type balls rotate several weeks, the edge suitable for reading of stifle is evenly squeezed in the conical surface groove of support fabrication hole;
With spanner, again rotate backward the polygon shank that dilates bar one end, take out stifle expansion device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310646177.4A CN103722528B (en) | 2013-12-06 | 2013-12-06 | Stifle expansion device and dilate method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310646177.4A CN103722528B (en) | 2013-12-06 | 2013-12-06 | Stifle expansion device and dilate method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103722528A true CN103722528A (en) | 2014-04-16 |
| CN103722528B CN103722528B (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310646177.4A Active CN103722528B (en) | 2013-12-06 | 2013-12-06 | Stifle expansion device and dilate method |
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| Country | Link |
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| CN (1) | CN103722528B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105195570A (en) * | 2015-09-07 | 2015-12-30 | 武汉重工铸锻有限责任公司 | Rolling seal tool for seal cover of oil orifice of high-speed diesel engine and sealing method adopting rolling seal tool |
| CN106270228A (en) * | 2016-08-24 | 2017-01-04 | 中船动力有限公司 | Mild steel boring cover quick expanding instrument and expanding method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE148636C (en) * | ||||
| DE170654C (en) * | ||||
| US1747376A (en) * | 1928-04-05 | 1930-02-18 | J Faessler Mfg Company | Tube expander and flarer |
| GB662443A (en) * | 1948-04-22 | 1951-12-05 | Outil Rotax L | Improvements in or relating to hole-drifting and tube-expanding tools |
| CN103273291A (en) * | 2013-05-31 | 2013-09-04 | 湖南路捷道夫涡轮增压系统有限公司 | Sealing technique of auxiliary holes |
| CN203650410U (en) * | 2013-12-06 | 2014-06-18 | 中船动力有限公司 | Stifling-cover expander |
-
2013
- 2013-12-06 CN CN201310646177.4A patent/CN103722528B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE148636C (en) * | ||||
| DE170654C (en) * | ||||
| US1747376A (en) * | 1928-04-05 | 1930-02-18 | J Faessler Mfg Company | Tube expander and flarer |
| GB662443A (en) * | 1948-04-22 | 1951-12-05 | Outil Rotax L | Improvements in or relating to hole-drifting and tube-expanding tools |
| CN103273291A (en) * | 2013-05-31 | 2013-09-04 | 湖南路捷道夫涡轮增压系统有限公司 | Sealing technique of auxiliary holes |
| CN203650410U (en) * | 2013-12-06 | 2014-06-18 | 中船动力有限公司 | Stifling-cover expander |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105195570A (en) * | 2015-09-07 | 2015-12-30 | 武汉重工铸锻有限责任公司 | Rolling seal tool for seal cover of oil orifice of high-speed diesel engine and sealing method adopting rolling seal tool |
| CN106270228A (en) * | 2016-08-24 | 2017-01-04 | 中船动力有限公司 | Mild steel boring cover quick expanding instrument and expanding method |
| CN106270228B (en) * | 2016-08-24 | 2018-07-27 | 中船动力有限公司 | The quick expanding tool of mild steel boring cover and expanding method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103722528B (en) | 2016-01-20 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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Address after: 212211 No. 402, Changjiang Road, Zhenjiang City, Jiangsu Province Patentee after: China Shipbuilding Power Zhenjiang Co.,Ltd. Address before: 402 Changjiang Road, Runzhou District, Zhenjiang City, Jiangsu Province Patentee before: CSSC MARINE POWER Co.,Ltd. |