CA1042271A - Device for manufacture of helically corrugated tubes - Google Patents
Device for manufacture of helically corrugated tubesInfo
- Publication number
- CA1042271A CA1042271A CA220,029A CA220029A CA1042271A CA 1042271 A CA1042271 A CA 1042271A CA 220029 A CA220029 A CA 220029A CA 1042271 A CA1042271 A CA 1042271A
- Authority
- CA
- Canada
- Prior art keywords
- corrugating
- tool
- tube
- corrugator
- forming edge
- 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.)
- Expired
Links
Classifications
-
- 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
- B21D15/00—Corrugating tubes
- B21D15/04—Corrugating tubes transversely, e.g. helically
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Joints That Cut Off Fluids, And Hose Joints (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A corrugating tool in the form of a segment, having a helically shaped forming edge, whereby the tool is in contact with less than the entire circumference of a tube to be corrugated. The tool is pivotably mounted to the corrugating head to permit adjustment of the corruga-ting depth.
A corrugating tool in the form of a segment, having a helically shaped forming edge, whereby the tool is in contact with less than the entire circumference of a tube to be corrugated. The tool is pivotably mounted to the corrugating head to permit adjustment of the corruga-ting depth.
Description
7~
I:~EVICE FOP~ MANUFACTURE OF
HELICALLY CORRUGATED TUBES
This invention relates to the production of corrugated tubes, and more particularly, to the production of helically corrugated tubes.
~ device for making helical.ly shaped corrugated pipes is known wherein a corrugating tool having a thread is mounted on a smooth pipe and the pipe then provided with a helica.lly shaped corrugation;
e. g., German Patent No. 690, 138. The finished corrugated pipes which are made in this fashion have a very even corrugation; however, the disadvantage of such a tool is that the tool becomes very hot during the manufacturing operation. In addition, the depth of the corrugation - :
Ls defined by the corrugation tool and the outer diameter of the smooth pipe to be corrugated.
. The prLnciple object of the present invention is to provide for an ~:
lmproved device for producing a helical.ly corrugated tube. ~.
In accordance with the present invention, there is provided a . 15 corrugating device which inc.ludes a tool for effecting a heLical corru-: gation having a he.lical.ly shaped forming edge which engages the wall-. of the tube to be corrugated over less than the fu11 circumference of . the tube. As a result of the contact being over less than the ful1 circumference of the tube being corrugated, the corrugating tool does . 1 20 not become excessive.ly hot-. -¦ In accordance with a particular.ly preferred embodiment, the corrugating tool, in the form of a segment having a helical forming edge which engages less than the ful1 circumference of the pipe being l . corrugated, is mounted in the corrugating device in a rnanner such. 25 that the depth of the corrugation produced by the tool can be changed.
. In accordance with the preferred aspect, the tool is pivotably mounted ;. about an axis outside of the pipe axis for increasing and decreasing
I:~EVICE FOP~ MANUFACTURE OF
HELICALLY CORRUGATED TUBES
This invention relates to the production of corrugated tubes, and more particularly, to the production of helically corrugated tubes.
~ device for making helical.ly shaped corrugated pipes is known wherein a corrugating tool having a thread is mounted on a smooth pipe and the pipe then provided with a helica.lly shaped corrugation;
e. g., German Patent No. 690, 138. The finished corrugated pipes which are made in this fashion have a very even corrugation; however, the disadvantage of such a tool is that the tool becomes very hot during the manufacturing operation. In addition, the depth of the corrugation - :
Ls defined by the corrugation tool and the outer diameter of the smooth pipe to be corrugated.
. The prLnciple object of the present invention is to provide for an ~:
lmproved device for producing a helical.ly corrugated tube. ~.
In accordance with the present invention, there is provided a . 15 corrugating device which inc.ludes a tool for effecting a heLical corru-: gation having a he.lical.ly shaped forming edge which engages the wall-. of the tube to be corrugated over less than the fu11 circumference of . the tube. As a result of the contact being over less than the ful1 circumference of the tube being corrugated, the corrugating tool does . 1 20 not become excessive.ly hot-. -¦ In accordance with a particular.ly preferred embodiment, the corrugating tool, in the form of a segment having a helical forming edge which engages less than the ful1 circumference of the pipe being l . corrugated, is mounted in the corrugating device in a rnanner such. 25 that the depth of the corrugation produced by the tool can be changed.
. In accordance with the preferred aspect, the tool is pivotably mounted ;. about an axis outside of the pipe axis for increasing and decreasing
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the depth of the corrugation and there is provided a means for changing and maintaining the position of the tool with respect to the tube to change the depth of the corrugation. --:, ,.-, , - ~
In accordance with a particularly preferred feature, the curva-ture of the forming edge of the corrugating tool is about equal to the curvature of the smooth tube. In addition, it is particularty preferred to provide a corrugating tool in which the height of the forming edge ;
decreases at the ends. In this manner, the beginning of the tube to be corrugated is engaged by the tool to provide a particularly even and flawless corrugation. -The invention will be further described with respect to the accompanying drawings, wherein:
FIGURE l is a sectional view of an embodiment of the corruga-tor of the present invention; and ;
lS FIGURE 2 is an enlarged sectional view along the dotted line of FIGURE l.
Referring to the drawings there is shown, a corrugator including a corrugating head l which is driven by a suitable drive means (not shown) through a pipe bushing 2 which is rotatabb mounted on a sta-tionary guide bushing 3. The guide bushing 3 guides and supports a tube to be corrugated, in the form of a pipe 4; e. g., a smooth wa~led ~-longitudinally welded pipe.
A corrugating tool 5, in the form of a segment, includes a helical forming edge 6. The disc segment is designed in a malmer such that the forming edge 6 is in contact with about one-half of the circumference of the pipe 4.
The tool 5 is mounted in a recess in the corrugating head I by a suitable support in the form of discs 11 and 12, which are adapted _3_ ,~ , ..
~04'~Z';1~
and shaped to clamp the corrugating tool 5 therebetween, with the discs 1.1 and 12 being mounted to the corrugating head I by suitab.le :
fastening means, such as screws 13. A separate and distinct distance . spacer .14 is also clamped between the discs 11 and 12, and the faces of discs 11 and 1~, adjacent to the tool 5 and spacer 14, are adjusted to accomodate the too.l 5 and spacer .14; i. e., the thickness of the discs . 11 and 12 changes in the circumferential direction. Thus, in effect the tool 5 and distance spacer 14 form a helical.ly shaped disc, with :
the tool portion or segment 5 of the disc providing the helical corruga-I; 10 tion. ~-~ The tool 5 is pivotab.ly mounted with respect to the head 1 by a boU 7, which is mounted to the face of discs 11 and .12, and passes -~
. through a suitable bore in the tool 5, whereby the tool 5 is pivotablearound bo.lt 7. The depth of the corrugation may be adjusted by pivo-ting tool 5 around bolt 7 towards and away fro~n the pipe 4 by a means for changing and maintaining the position of the tool 5 in the form of an adjusting screw 9, which is provided in a bore 8 of corrugating head 1. Thus, prior to each operation, the depth of the corrugation can be adjusted by adjustment of screw 9.
The present invention is particular.ly advantageous in that over-' heating of the tool is avoided, and the depth of the corrugation can . easi.ly be changed. . c .. The helLcally corrugated pipes made with the tool of the present . invention can be used for a wide variety of purposes, and are particu-lar.ly suitable for use as inner and outer conductors in high frequency `` cable s .
., Numerous modifications and variations of the present invention are possible in light of the above teachings and, therefore, within the . , .
4 .
scope of the appended c.laims, the invention may be practiced other- .
wise than as particularly described, -:
r .. ~ ~ .
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the depth of the corrugation and there is provided a means for changing and maintaining the position of the tool with respect to the tube to change the depth of the corrugation. --:, ,.-, , - ~
In accordance with a particularly preferred feature, the curva-ture of the forming edge of the corrugating tool is about equal to the curvature of the smooth tube. In addition, it is particularty preferred to provide a corrugating tool in which the height of the forming edge ;
decreases at the ends. In this manner, the beginning of the tube to be corrugated is engaged by the tool to provide a particularly even and flawless corrugation. -The invention will be further described with respect to the accompanying drawings, wherein:
FIGURE l is a sectional view of an embodiment of the corruga-tor of the present invention; and ;
lS FIGURE 2 is an enlarged sectional view along the dotted line of FIGURE l.
Referring to the drawings there is shown, a corrugator including a corrugating head l which is driven by a suitable drive means (not shown) through a pipe bushing 2 which is rotatabb mounted on a sta-tionary guide bushing 3. The guide bushing 3 guides and supports a tube to be corrugated, in the form of a pipe 4; e. g., a smooth wa~led ~-longitudinally welded pipe.
A corrugating tool 5, in the form of a segment, includes a helical forming edge 6. The disc segment is designed in a malmer such that the forming edge 6 is in contact with about one-half of the circumference of the pipe 4.
The tool 5 is mounted in a recess in the corrugating head I by a suitable support in the form of discs 11 and 12, which are adapted _3_ ,~ , ..
~04'~Z';1~
and shaped to clamp the corrugating tool 5 therebetween, with the discs 1.1 and 12 being mounted to the corrugating head I by suitab.le :
fastening means, such as screws 13. A separate and distinct distance . spacer .14 is also clamped between the discs 11 and 12, and the faces of discs 11 and 1~, adjacent to the tool 5 and spacer 14, are adjusted to accomodate the too.l 5 and spacer .14; i. e., the thickness of the discs . 11 and 12 changes in the circumferential direction. Thus, in effect the tool 5 and distance spacer 14 form a helical.ly shaped disc, with :
the tool portion or segment 5 of the disc providing the helical corruga-I; 10 tion. ~-~ The tool 5 is pivotab.ly mounted with respect to the head 1 by a boU 7, which is mounted to the face of discs 11 and .12, and passes -~
. through a suitable bore in the tool 5, whereby the tool 5 is pivotablearound bo.lt 7. The depth of the corrugation may be adjusted by pivo-ting tool 5 around bolt 7 towards and away fro~n the pipe 4 by a means for changing and maintaining the position of the tool 5 in the form of an adjusting screw 9, which is provided in a bore 8 of corrugating head 1. Thus, prior to each operation, the depth of the corrugation can be adjusted by adjustment of screw 9.
The present invention is particular.ly advantageous in that over-' heating of the tool is avoided, and the depth of the corrugation can . easi.ly be changed. . c .. The helLcally corrugated pipes made with the tool of the present . invention can be used for a wide variety of purposes, and are particu-lar.ly suitable for use as inner and outer conductors in high frequency `` cable s .
., Numerous modifications and variations of the present invention are possible in light of the above teachings and, therefore, within the . , .
4 .
scope of the appended c.laims, the invention may be practiced other- .
wise than as particularly described, -:
r .. ~ ~ .
' , :. ' , 1'' '''' I .
., .
~ , i,',': ': :. . ' ~` ', ,' I ..
"':''"
i' ,'' ' ';
L , .; , 1' ', .
'~ 1-' -': ' : . .
:' . I~
,, , 1 '~ ' I , , (~I "., .' ~ . .', . "
;! I
: ' ., . ~1 .
~i :
i, : . ,: :
., . 1. , ' 5~ ,.:
. : - . ~ , .
: . .
Claims (10)
1. A corrugator, comprising:
a driven corrugating head; and a corrugating tool having a helically shaped forming edge connected to the head for corrugating the exterior of a tube, said corrugating tool being in the form of a segment whereby the forming edge of the tool is in contact with the exterior of the tube over less than the circumference of the tube.
a driven corrugating head; and a corrugating tool having a helically shaped forming edge connected to the head for corrugating the exterior of a tube, said corrugating tool being in the form of a segment whereby the forming edge of the tool is in contact with the exterior of the tube over less than the circumference of the tube.
2. The corrugator of Claim 1 and further comprising means for pivotably mounting the corrugating tool to the corrugating head and means to change and maintain the position of the pivotably mounted corrugating tool with respect to the tube to adjust the depth of the corrugation.
3. The corrugator of Claim 2 wherein the means for changing and maintaining the position of the corrugating tool is a screw bolt in the corrugating head to move the pivotably mounted corrugating tool towards and away from the tube.
4. The corrugator of Claims 1, 2 or 3, wherein the curvature of the forming edge is equal to the curvature of a tube to be corrugated.
5. The corrugator of Claims 1, 2 or 3, wherein the height of the forming edge decreases at the end portion.
6. The corrugator of Claims 1, 2 or 3, wherein the corrugating tool is in the form of a segment which engages the tube over about half the circumference of the tube.
7. A corrugator, comprising:
a driven rotatable corrugating head;
a corrugating tool having a helically shaped forming edge, said corrugating tool being in the form of a segment where-by the forming edge of the tool is in contact with the exterior of a tube to be corrugated over less than the circumference of the tube;
mounting means for directly mounting the corrugating tool to the corrugating head, said means including means for pivotally supporting the tool and clamping means for clamping the corrugating tool to the corrugating head;
means to change and maintain the position of the pivotally mounted corrugating tool with respect to the tube to adjust the depth of the corrugation, said means for changing and maintaining the position of the pivotally mounted corrugating tool maintaining the forming edge of the corrugating tool in contact with the tube during rotation of the corrugating head to produce a helical corrugation.
a driven rotatable corrugating head;
a corrugating tool having a helically shaped forming edge, said corrugating tool being in the form of a segment where-by the forming edge of the tool is in contact with the exterior of a tube to be corrugated over less than the circumference of the tube;
mounting means for directly mounting the corrugating tool to the corrugating head, said means including means for pivotally supporting the tool and clamping means for clamping the corrugating tool to the corrugating head;
means to change and maintain the position of the pivotally mounted corrugating tool with respect to the tube to adjust the depth of the corrugation, said means for changing and maintaining the position of the pivotally mounted corrugating tool maintaining the forming edge of the corrugating tool in contact with the tube during rotation of the corrugating head to produce a helical corrugation.
8. The corrugator of Claim 7, wherein the curvature of the forming edge is equal to the curvature of the tube to be corrugated.
9. The corrugator of Claim 8, wherein the height of the forming edge decreases at the end portion.
10. The corrugator of Claims, 7, 8 or 9, wherein the corrugating tool is in-the form of a segment which engages the tube over about half the circumference of the tube.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19742406910 DE2406910C2 (en) | 1974-02-14 | 1974-02-14 | Device for the production of helically corrugated tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1042271A true CA1042271A (en) | 1978-11-14 |
Family
ID=5907289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA220,029A Expired CA1042271A (en) | 1974-02-14 | 1975-02-13 | Device for manufacture of helically corrugated tubes |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS50117667A (en) |
| CA (1) | CA1042271A (en) |
| DE (1) | DE2406910C2 (en) |
-
1974
- 1974-02-14 DE DE19742406910 patent/DE2406910C2/en not_active Expired
-
1975
- 1975-02-13 CA CA220,029A patent/CA1042271A/en not_active Expired
- 1975-02-14 JP JP1810275A patent/JPS50117667A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE2406910C2 (en) | 1983-01-05 |
| JPS50117667A (en) | 1975-09-13 |
| DE2406910A1 (en) | 1975-08-28 |
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