GB2277893A - Apparatus for deforming a cylindrical sleeve - Google Patents
Apparatus for deforming a cylindrical sleeve Download PDFInfo
- Publication number
- GB2277893A GB2277893A GB9310047A GB9310047A GB2277893A GB 2277893 A GB2277893 A GB 2277893A GB 9310047 A GB9310047 A GB 9310047A GB 9310047 A GB9310047 A GB 9310047A GB 2277893 A GB2277893 A GB 2277893A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sleeve
- deforming means
- deforming
- radially outwardly
- support member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/28—Making tube fittings for connecting pipes, e.g. U-pieces
-
- 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
- B21D53/16—Making other particular articles rings, e.g. barrel hoops
- B21D53/18—Making other particular articles rings, e.g. barrel hoops of hollow or C-shaped cross-section, e.g. for curtains, for eyelets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention provides apparatus for deforming a cylindrical sleeve S, the apparatus comprising a support member 2 for supporting the sleeve, a first deforming means 1 which is axially moveable with respect to 2, thereby deforming an end portion of the sleeve S radially outwardly as it is moved axially towards the support member; a second deforming means 4 which is arranged in use to be positioned within the supported sleeve S; means 1e, 4a for urging the second deforming means radially outwardly at a position inwardly of the said end portion; and a third deforming means 3 which is arranged to extend around the outer circumference of the sleeve S; wherein the third deforming means 3 deforms the sleeve S radially inwardly at a location between the said end portion and the said wall portion. <IMAGE>
Description
APPARATUS FOR DEFORMING A CYLINDRICAL SLEEVE
The present invention relates to an apparatus for deforming a cylindrical sleeve or sleeve-like member to a desired configuration, and more particularly to the production of sleeves for mechanical couplings wherein the sleeves have a "barrelled and flared" configuration. The present invention also relates to a process for producing such "barrelled and flared" sleeves for mechanical couplings using the apparatus of the invention.
Mechanical coupling sleeves having a "barrelled and flared" configuration, for coupling together pipes and pipe-elements, are known. Such sleeves have a mid-portion of relatively enlarged diameter, the diameter of the sleeve decreasing to a minimum diameter at a point each side of the mid-portion, and then flaring outwardly from the points of minimum diameter to the ends of the sleeve. The sleeves thus have a wall profile which in axial cross-section is in the shape of a flattened "W".
Such sleeves can be made by casting. Alternatively they can be fabricated from cylindrical sleeve blanks made from a formable material such as steel in a series of operations comprising deforming the wall of the cylinder to impart a W-shaped axial profile, and then expanding the deformed cylinder to the required diameter.
A disadvantage of the aforementioned method is that the process of deforming the cylinder wall to impart to it a W-shaped configuration, and the expansion of the cylinder thus deformed to the required diameter, are carried out as separate steps.
It is an object of this invention to enable the aforesaid two separate steps to be achieved in one step thereby cutting down on processing time and cost, and reducing the number of different items of machinery required.
Accordingly, the invention provides apparatus for deforming a cylindrical sleeve, the apparatus comprising a support member for supporting the sleeve, the support member being axially aligned with the sleeve; a first deforming means which in use is axially aligned with the support member and axially moveable with respect thereto, the first deforming means being arranged to deform an end portion of the sleeve radially outwardly as it is moved axially towards the support member; a second deforming means which is arranged in use to be positioned within the supported sleeve; means for urging the second deforming means radially outwardly as the first deforming means is moved axially towards the support member such that the second deforming means deforms a wall portion of the sleeve radially outwardly at a position inwardly of the said end portion; and a third deforming means which is arranged to extend around the outer circumference of the sleeve; and means for drawing the third deforming means radially inwardly when the first deforming means is moved axially towards the support member such that the third deforming means deforms the sleeve radially inwardly at a location between the said end portion and the said wall portion.
The supporting member preferably is provided with an axial protrusion which extends into the sleeve and is arranged to support the second deforming means.
The axial protrusion can be provided with a frustoconical portion, and the urging means for urging the said deforming means radially outwardly can take the form of means for urging the said second deforming means axially and outwardly along the frustoconical portion.
The second deforming means can take the form of an annulus or collet formed of a plurality of segments linked by resilient means, such as a spring or O-ring. The second deforming means can be provided with a radially inner inclined surface which cooperates with and is slidable over the frustoconical portion of the supporting means to bring about radial expansion of the second deforming means.
The first deforming means is preferably provided with an axially extending portion which is insertable into the end of the sleeve and has a surface for engaging the second deforming means and urging it along the said frustoconical portion of the supporting member. The axially extending portion can have at an axial end thereof a radially inwardly inclined circumferential surface for engaging the second deforming means to urge it radially outwardly as the first deforming means is moved axially towards the supporting member.
The first deforming means can be provided with a radially outwardly inclined surface for engaging a complimentary inclined surface on the third deforming means to draw the third deforming means radially inwardly as the first deforming means is moved axially towards the supporting member.
The supporting member is preferably configured in a complimentary manner to the first deforming means in order that the sleeve is deformed in a similar manner at both ends thereof, but it need not be. It could be deformed in the aforesaid manner at one end only, the other end being configured in a different manner.
The present invention also provides a process for producing a barrelled and flared sleeve for the coupling together of pipe or pipe-like members, the process comprising supporting a cylindrical sleeve blank on a support member axially aligned with the sleeve blank; moving a first deforming means along an axial path towards the sleeve and into contact with an end portion of the sleeve so as to deform the end portion to a conformation in which it is radially outwardly inclined; providing a second deforming means located within the sleeve blank and urging the second deforming means radially outwardly into contact with a wall portion at a position axially inwardly of the said end portion to deform the said wall portion radially outwardly; and providing a third deforming means located about the outer circumference of the sleeve and urging the third deforming means radially inwardly into contact with the sleeve blank to deform the sleeve radially inwardly at a location between the said end portion and the said wall portion.
In particular, the present invention provides a process for producing a barrelled or flared sleeve by deforming a cylindrical sleeve blank using the apparatus of the invention as hereinbefore defined.
The invention will now be illustrated, but not limited, by reference to a particular embodiment as shown in the accompanying drawings of which:
Figure 1 is a plan view of apparatus according to one embodiment of the invention;
Figure 2 is a sectional elevation along line I-I in
Figure 1;
Figure 3 is an enlarged view of a portion of Figure 2; and
Figures 4a and 4b are partial side elevations of the embodiment illustrated in Figures 1 to 3 illustrating the operation of the apparatus.
Referring now to the drawings, it can be seen that the apparatus comprises an upper block 1, a lower block 2 and a support die 3 which is split axially to form two halves.
Upper block 1 constitutes a first deforming means, support die 3 constitutes a third deforming means, and lower block 2 constitutes a supporting member as defined hereinabove.
Mounted about the upper block 1 and the lower block 2, and located within the support die 3, is a collet 4 which is split to form multiple segments of equal proportion held together by an expandable element 5. Collet 4 constitutes the second deforming means as hereinbefore defined.
The upper block 1 is secured at its upper surface to a platen 6 by means of a suitable bolt or screw 6a. Upper block 1 has a downwardly extending cylindrical portion la which has an outer diameter of a size to enable it to be inserted inside an open end of a cylindrical sleeve blank
S. In this embodiment, cylindrical sleeve blank can be formed by cutting an appropriate length of flat steel strip, rolling the strip to form a cylinder, and welding the confronting edges together to complete the cylinder.
Alternatively, it could be formed simply by cutting an appropriate length from a pre-formed steel cylinder.
Cylindrical portion la of upper block 1 is provided at its lower end with a cylindrical recess ib of a size to accommodate a generally frustoconical portion 2a of the lower block 2. At the upper end of the cylindrical portion la is a radially inwardly inclined annular surface or shoulder ic, which together with radially outwardly inclined surface Id defines an annular recess having an inverted V-shape in cross-section. At the lower end of the cylindrical portion la, there is provided a radially inwardly inclined surface le, the purpose of which will become apparent from the following description.
Lower block 2 has an upwardly extending generally frustoconical portion 2a which has towards its upper end an annular recess 2b defined by radially inwardly inclined wall 2c, co-axial wall portion 2d and radially outwardly inclined surface 2e. The annular recess 2b is shaped so as to accommodate the collet 4. Collet 4 is biased into the recess 2b by means of the expandable biasing element 5 which can be, for example, a spring or 'O-ring'. The expandable element 5 is held in a recess 4d in the surface of the collet 4.
Collet 4 is provided with an upper radially outwardly inclined inner surface 4a which in use engages inclined surface le of the upper block 1. Collet 4 is also provided with a lower radially outwardly inclined surface 4c which in use engages inclined surface 2e of the frustoconical portion 2a of lower block 2. The radially outwardly facing surface of the collet 4 is provided with an annular ridge 4e which serves to delimit inclined surfaces 4f and 4g.
Support die 3 is split axially to form two halves 3a and 3b. Support die 3 has a radially inner surface which in axial cross-section is formed in the shape of a flattened W, the two outer limbs of the W being defined by radially outwardly inclined surfaces 3c and 3d and the two inner limbs of the W being defined by surfaces 3e and 3f.
Support die 3 is also provided with inclined surfaces 3g and 3h which lie adjacent surfaces 3d and 3c respectively.
In use, the platens 6 and 7 are pulled apart, thereby separating the upper 1 and lower 2 blocks. As the upper block 1 is retracted, the collet 4 is caused to contract by the biassing force of the biassing element 5, such that it slides upwardly along the surface 2e into the annular recess 2b on the frustoconical portion 2a, the radially inner surface 4b of the collet 4 resting against the surface 2d. After retraction of the upper block 1, the two halves 3a and 3b of the support die 3 are removed from their location in the lower block 2 thus exposing the loosely placed collet 4.
A cylindrical steel sleeve blank S is then put in place such that it envelopes the collet 4 and its lower end rests on the inclined surface 2h of the lower block 2.
The two halves 3a, 3b of the support die 3 are then replaced, surrounding the cylindrical steel sleeve blank S, and are located such that the upper and lower circumferential ridges 3i and 3j on the support die 3 rest against the outer surface of the sleeve blank S and the inclined surface 3g rests against the complimentary inclined surface 2i on the lower block 2.
The upper block 1 is then lowered such that it engages the support die 3, and the collet 4, the surface id sliding over surface 3h on the support die 3, and surface le sliding over the inclined surface 4a of the collet 4. As further load is applied to the upper block 1 through the platen 6, the inter-engagement of the surfaces id and 3h, and the surfaces 2i and 3g, causes the support die 3 to be drawn radially inwardly and axially downwardly, such that ridges 3i and 3j are urged against the outer surface of the sleeve blank to deform the walls of the sleeve blank radially inwardly. At the same time surfaces ib and 2h on upper block 1 and lower block 2 respectively cam against the upper and lower ends of the sleeve blank to flare out the ends of the sleeve blank. Furthermore, as the upper block 1 is advanced towards the lower block, inclined surface le cams against surface 4a on the collet to force the collet 4 along surface 2e, such that the collet is expanded radially outwardly against the inner wall of the sleeve blank to deform the sleeve blank radially outwardly at the point of contact. The net result of the combined deforming actions of each of the upper block 1, lower block 2, support die 3 and collet 4 is that the sleeve blank S is deformed such that in axial cross section, its wall takes on the form of a flattened "W" as illustrated in Figure 4b.
In order to remove the finished sleeve, the upper block 1 is withdrawn and the supporting die 3 is removed.
An advantage of the method and apparatus of the present inventions that the two steps of deforming the sleeve blank to give a "W-shaped" profile, and expanding the sleeve to the desired size formerly carried out separately, are accomplished in one step, thereby obviating the need for separate tooling, and reducing processing time.
It will readily be appreciated by the skilled man that numerous modifications and alterations could be made to the apparatus specifically described above and illustrated in the accompanying drawings, and all such modifications and alterations are intended to be embraced by the application.
Claims (14)
1. Apparatus for deforming a cylindrical sleeve, the apparatus comprising a support member for supporting the sleeve, the support member being axially aligned with the sleeve; a first deforming means which in use is axially aligned with the support member and axially moveable with respect thereto, the first deforming means being arranged to deform an end portion of the sleeve radially outwardly as it is moved axially towards the support member; a second deforming means which is arranged in use to be positioned within the supported sleeve; means for urging the second deforming means radially outwardly as the first deforming means is moved axially towards the support member such that the second deforming means deforms a wall portion of the sleeve radially outwardly at a position inwardly of the said end portion; and a third deforming means which is arranged to extend around the outer circumference of the sleeve; and means for drawing the third deforming means radially inwardly when the first deforming means is moved axially towards the support member such that the third deforming means deforms the sleeve radially inwardly at a location between the said end portion and the said wall portion.
2. Apparatus according to Claim 1 wherein the support member is provided with an axial protrusion which extends into the sleeve and is arranged to support the second deforming means.
3. Apparatus according to Claim 2 wherein the axial protrusion is provided with a frustoconical portion, and the urging means for urging the said deforming means radially outwardly takes the form of means for urging the said second deforming means axially and outwardly along the frustoconical portion.
4. Apparatus according to any one of the preceding
Claims wherein the second deforming means takes the form of an annulus or collet formed of a plurality of segments linked by resilient means.
5. Apparatus according to Claim 4 wherein the resilient means is a spring or an Bring.
6. Apparatus according to Claim 3 wherein the second deforming means is provided with a radially inner inclined surface which cooperates with and is slidable over the frustoconical portion of the supporting means to bring about radial expansion of the second deforming means.
7. Apparatus according to Claim 3 or Claim 6 wherein the first deforming means is provided with an axially extending portion which is insertable into the end of the sleeve and has a surface for engaging the second deforming means and urging it along the said frustoconical portion of the supporting member.
8. Apparatus according to Claim 7 wherein the axially extending portion has at an axial end thereof a radially inwardly inclined circumferential surface for engaging the second deforming means to urge it radially outwardly as the first deforming means is moved axially towards the supporting member.
9. Apparatus according to any one of the preceding
Claims wherein the first deforming means is provided with a radially outwardly inclined surface for engaging a complimentary inclined surface on the third deforming means to draw the third deforming means radially inwardly as the first deforming means is moved axially towards the supporting member.
10. Apparatus according to any one of the preceding
Claims wherein the supporting member is configured in a complimentary manner to the first deforming means in order that the sleeve is deformed in a similar manner at both ends thereof.
11. A process for producing a barrelled or flared sleeve for the coupling together of pipe or pipe-like members, the process comprising supporting a cylindrical sleeve blank on a support member axially aligned with the sleeve blank; moving a first deforming means along an axial path towards the sleeve and into contact with an end portion of the sleeve so as to deform the end portion to a conformation in which it is radially outwardly inclined; providing a second deforming means located within the sleeve blank and urging the second deforming means radially outwardly into contact with a wall portion at a position axially inwardly of the said end portion to deform the said wall portion radially outwardly; and providing a third deforming means located about the outer circumference of the sleeve and urging the third deforming means radially inwardly into contact with the sleeve blank to deform the sleeve radially inwardly at a location between the said end portion and the said wall portion.
12. A process according to Claim 11 for producing a barrelled or flared sleeve by deforming a cylindrical sleeve blank using the apparatus of any one of Claims 1 to 10.
13. Apparatus for deforming a cylindrical sleeve, the apparatus being substantially as described herein with reference to the accompanying drawings.
14. A method of deforming a cylindrical sleeve substantially as described herein with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9310047A GB2277893B (en) | 1993-05-15 | 1993-05-15 | Apparatus for deforming a cylindrical sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9310047A GB2277893B (en) | 1993-05-15 | 1993-05-15 | Apparatus for deforming a cylindrical sleeve |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9310047D0 GB9310047D0 (en) | 1993-06-30 |
| GB2277893A true GB2277893A (en) | 1994-11-16 |
| GB2277893B GB2277893B (en) | 1996-03-27 |
Family
ID=10735554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9310047A Expired - Fee Related GB2277893B (en) | 1993-05-15 | 1993-05-15 | Apparatus for deforming a cylindrical sleeve |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2277893B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0710780A1 (en) * | 1994-11-01 | 1996-05-08 | Unisia Jecs Corporation | Installation ring for mounting pressurized fluid buffer device and fabrication method therefor |
| GB2305624A (en) * | 1995-09-27 | 1997-04-16 | Itw Ltd | Plumbing Fitting and a method of making a plumbing fitting |
| US5899107A (en) * | 1995-05-08 | 1999-05-04 | Veritas Gummiwerke Ag | Process and pressing tools for joining tubular elements |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1598204A (en) * | 1977-02-07 | 1981-09-16 | Gould Inc | Tube flaring tool |
| US4442693A (en) * | 1981-11-02 | 1984-04-17 | The Continental Group, Inc. | Method of and apparatus for shaping neck and providing terminal curl on can end |
| EP0133952A1 (en) * | 1983-07-26 | 1985-03-13 | Rothenberger GmbH & Co. Werkzeuge-Maschinen KG | Manually operated tool for flaring tubes |
| GB2150477A (en) * | 1983-11-30 | 1985-07-03 | Toyoda Gosei Kk | Metal forming apparatus |
| US4535616A (en) * | 1983-04-08 | 1985-08-20 | Dowley Manufacturing, Inc. | Flaring tool |
-
1993
- 1993-05-15 GB GB9310047A patent/GB2277893B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1598204A (en) * | 1977-02-07 | 1981-09-16 | Gould Inc | Tube flaring tool |
| US4442693A (en) * | 1981-11-02 | 1984-04-17 | The Continental Group, Inc. | Method of and apparatus for shaping neck and providing terminal curl on can end |
| US4535616A (en) * | 1983-04-08 | 1985-08-20 | Dowley Manufacturing, Inc. | Flaring tool |
| EP0133952A1 (en) * | 1983-07-26 | 1985-03-13 | Rothenberger GmbH & Co. Werkzeuge-Maschinen KG | Manually operated tool for flaring tubes |
| GB2150477A (en) * | 1983-11-30 | 1985-07-03 | Toyoda Gosei Kk | Metal forming apparatus |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0710780A1 (en) * | 1994-11-01 | 1996-05-08 | Unisia Jecs Corporation | Installation ring for mounting pressurized fluid buffer device and fabrication method therefor |
| US5794741A (en) * | 1994-11-01 | 1998-08-18 | Nissan Motor Co., Ltd. | Installation ring for mounting pressurized fluid buffer device and fabrication method therefor |
| US5899107A (en) * | 1995-05-08 | 1999-05-04 | Veritas Gummiwerke Ag | Process and pressing tools for joining tubular elements |
| GB2305624A (en) * | 1995-09-27 | 1997-04-16 | Itw Ltd | Plumbing Fitting and a method of making a plumbing fitting |
| GB2305624B (en) * | 1995-09-27 | 1999-05-05 | Itw Ltd | A pressing and a method of and apparatus for making a pressing |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2277893B (en) | 1996-03-27 |
| GB9310047D0 (en) | 1993-06-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20100515 |