CA1042644A - Method of shaping a screw type clamping collar - Google Patents
Method of shaping a screw type clamping collarInfo
- Publication number
- CA1042644A CA1042644A CA253,829A CA253829A CA1042644A CA 1042644 A CA1042644 A CA 1042644A CA 253829 A CA253829 A CA 253829A CA 1042644 A CA1042644 A CA 1042644A
- Authority
- CA
- Canada
- Prior art keywords
- band
- collar
- edges
- shoulders
- anvil
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/02—Hose-clips
- F16L33/08—Hose-clips in which a worm coacts with a part of the hose-encircling member that is toothed like a worm-wheel
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Clamps And Clips (AREA)
- Joints That Cut Off Fluids, And Hose Joints (AREA)
Abstract
Abstract of the Disclosure In accordance with the process of the present invention the flexible collar of a screw-type clamping collar is formed of a flexible metal strip of predetermined width, and one end thereof is either hot or cold stamped to force material of the collar outwardly along its edges at pre-determined locations where transverse shoulders are desired to serve as stops for the clamp's saddle housing with sufficient rigidity and strength to withstand the pulling force applied to the clamping collar. The process results in a substantial savings of material as compared to previously proposed structures with a resulting reduction in manufacturing costs.
Description
Tne present invention relates to screw-type clam~i~g collars and, more particularly to a process ~or treating or shaping - one end of the collar to facilitate mounting of the collar's saddle nousing thereon.
Screw-type clamping collars are a well known means or connecting flexible hoses or collars to'other structures such a~
pipes. Such collars are particularly useful in the automotive f~eld.
The usual screw-type flexible collar includes a screw mounted for free rotation inside a housing, but held in a fixed axial position within thè'housing, which is secured on one end, or near one end, of a flexible band. The o ther end of the band or coLlar is engaged, when the band is bent, between the housing'and the end of the band to which the housing is attached, so that the threads of the screw engage a corresponding toothed rack on the band. The rack begins near the ~ end of the band and extends over a suitable length of the band selected; in accordance with the sizes of the pieces or ob3ects to be clamped.
Turning of the screw adiusts the diameter of the collar and thus the cla~ping effect thereof.
A very critical point of the construction of screw-type clamping collars is the point where the saddle housing, carrying the adjusting screw, is secured to the b~nd. It is this point on the band ich sustains the entire reaction pull w'nen the screw is turned in order to pull the rack end'of the band to effect the clamping. -'This ' pull can reach a relatively very high level of efficiency in these ! ~ clamps and thus produce high strssses in the connection of thé saddLe hou~ing to the band.
Currently in order to obtain stopping and anchoring points for the saddle housing on the sides of the band, a band is , '' ~
, ,, ,, , , - . , . . , . ,. " ._ ., ., ,, . , . ~ .
1~4Z~44 generally used which is considerably wider than necessary for the clamping band or collar. Long tongues or recesses are then cut out along the edges of the band and transverse lugs are put on both sides of the recesses which then receive the corres-ponding lugs of the saddle housing. The housing lugs are thenturned down or bent and sturdily positioned in a fixed position along the under sides of the band.
This mode of execution is costly since it involves using a band which is larger or wider than necessary, and there is thus a considerable loss of material.
It is an object of the process according to the invention to remedy these disadvantages.
According to an aspect of the present invention the so-called flexible band or collar is of a screw-type clamping collar made from a malleable strip of material, i.e. metal or other suitable materials in a width only as wide as the desired width necessary for the flexible collar. One end of this band is then either hot or cold stamped at predetermined locations on the edge of the end to force material at those places laterally outwardly and form transverse shoulders defining the desired stops for the saddle housing with sufficient , rigidity and strength to withstand the pulling force applied to the clamping collars.
In accordance with the present invention there is provided a method of treating a flexible band for use in a screw-type clamping collar having a saddle housing including a pair of spaced legs thereon comprising the steps of forming the flexible band of malleable material in a predetermined width; stamping one of said band along its edges to extend , 30 the material of the band beyond the edges thereof and form ,' ~ ~ 2 -, ~
1~42644 transverse shoulders on said band edges in spaced relation to each other, whereby the legs of said housing may be placed between the shoulders and bent under the band with said shoulders, integral with the band, and resisting longitudinal movement of the housing along the band and the forces applied thereto when the clamp is used.
The above, and other objects, features and advantages of the present invention will be apparent in the following detailed description of an illustrative embodiment thereof which is to be read in connection with the accompanying drawings, wherein.
Figure 1 is a perspective view of a screw-type clamp-ing collar according to the present invention;
- 2a -~4Z644 Figure 2 is an e~ploded side ,view of the clamping collar of Figure 1, showing the individual elements ma~ing up the collar;
Figures 3 and 4 are schematic sectional views show-ing the process of making transverse shoulders in the collar or band, wherein Figure 3 illustrates the punch and anvil before the operation and Figure 4 illustrates the end of the operation;
Figure 5 is a top plan view of the anvil of Figures 3 and 4 with the band placed on the anvil and after completion of ~he punching operation;
Figure 6 is a partial exploded perspective view of the finished band ready for assembly with a screw-bearing saddle housing;
Figure 7 is a transverse sectional view, on an enlarged scale, showing the band assembled on the saddle housing;
Figures 8, 10 and 12 are schematic side sectional views, similar to Figures 3 and 4, illustrating another punch and anvil arrangement for use in forming transverse stops on the.band;
Figures 9, 11 and 13 are plan views of the band respe~-tively showing the configuration of the band after treatment in the apparatus shown in Figures 8, 10 and 12 respectively; and Figures 14, 15 and 16 are top plan views of another band illustrating another method of making transverse stop shoulders on the band.
Referring now to the drawings in detail, and initially to Figure 1 thereof, a screw-type clam~ing collar 10 constructed by use of the method ~f the present invention is illustrated which includes a flexible band 11, a saddle housing 12, and a scrEw 13.
, , .
- ~42644 `.
The latter is mounted in any known manner or free rotation inside housing 12, but is held by the housing in a fixed axial po3ition.
The saddle housing, with its screw 13,' is mounted adjacent one end 14 of flexible band"ll. The band has at its other end 16 a number of transverse openings 18 formed therein which define a gear rack that engages and cooperates with the thrèads o screw 13> when t'nis end is engaged in the housing between the screw and the end 14 of the band.
The flexible band or collar 11 is preferably formed of a malleable material, such as metal, with a uniform width L
selected to be the width necessary for the use to which the clamp is to be placed. The length of the band is cut such that the band will make, after rolling, a collar having a specific diameter.
In accordance with the present invention, the end 14 of the band is placed on an anvil or bos;s 16 which has longitudinal guiding tracks 18 formed in raised parts 20 thereon. The band rests on four bosses 22 formed in the base of the anvil. Each bo~s has a rectangular top surface in plan which slopes (as seen in Figure 3) fro~ a point near the median axis of the band downwardly and away from the band. Between the boss'es, clearings or recesses 24 are formed in the anvil to enable the passage o tongs 26 carried by a reciprocal punch head 28.
As seen in Figure 4,when punch head 28 is operated downwardly, in the line of arrow F, (as'for egample by a cam or the like in the conventional manner) the tongs or punches 26 penetrate into the anvil recesses 24 and the -bottom 30 of the punch head engages the flex~ble band 11. The striking of the band in this m~nner pushe's the malléable material of the band laterally in the direction of arrows , .
, ~4~
s - ... . _ .. _.. __, .. ~
1~4Z644 f, to form the pairs of stops or shoulders ~2 on the band. At the same time, the tongs 24 prevent the band material from ~lowing between these snoulders and tr.us form recesses 34 therebetween (see Figure 6).
Additional operations may be performed on the band end 14 by cutting a central opening 36 therein forming a profiled end 3~
as shown in Figure 6. These operations can be performed in any known . .
manner.
The saddle housing 12, having screw 3 mounted therein is secured to the end 14 of band 11 by its lugs 40 which are initially straight and placed between the respective pairs of shoulders 32 (see Figure 6) until its own shoulders 42 engage the stops 32. The lugs are then turned or bent down under the band to complete the assembly (see Figure 7).
The flexible band 11 can also be shaped to form shoulders 32 by the apparatus illustrated in Figures 8 to 13. As seen therein the end 14 of band 11 is placed and properly guided in guide tracks or the like on an anvil or base 44 having an opening 46 therein. A
reciprocal punch-caxrier 49 having apunch 50 mounted thereon is guided in a pressure plate 52 above anvil 44. The carrier and plate are reciprocated in any known manner to cause the punch to cooperate with the anvil and punch or cut a median slot 54 having bulged-out or rounded ends 56 in the median portions of band 11 (see Figure 9).
The slotted band end is then placed and guided on a second anvil 58 having, underneath the positions at which the band is supported, two laterally movable parts 60 biased by springs 62. A second punch assembly incluidng a reciprocal punch carrier 64, a punch 66 and a pressure plate 68 are located above this second anvil and operation , ~ 1~4'~644 ~h~r~ a~ainst the anvil will cause th2 second punch 6~, which is wider than punch 50, to penetrate slot 56 and move the anvil parts 60 apart from each other, against the bias of the springs thus forcing the band material to move adjacent slot 56 to form protuberances 64, while the conical punch 66 expan~s slot 56 (see Figures 10 and 11).
The end 14 of band ll is then placed and guided on a third anviL 67 where it is held in place by a reciprocal pressure plate 68 in which three punches 70, 72,74 are slidable. These punches are carried by a reciprocal punch-carrier 76. Upon operation or reciprocation of carrier 76 toward anvil 67 (which has complementary openings therein) the punches 72, 74 form the desired shoulders 32 separated by recesses or spaces 24 (see Figures 12 and 13) and the punch 72 further widens slot 54. If desired the punch may be designed to also cut the end 16 of the band (see Figure 13) to form a profiled end.
According to another embodiment of the invent~on Cshown in Figures 14, 15 and 16) band 11 is, in a first operation, punched (in a process similar to that sho~n in Figure 8) to form generally bow-tie shaped openings 80 therein in slightly spaced relation to each other (see Figure 14~. These openings have inwardly curved sides 81. The band is then punched again, between a punch and anvil (in t'ne same manner as described above with respect to Figure 10) in order to move the side edges of the band.forming lateral protrusions 82, while enlarging openings 86 (see Figure 15). The inwardly curvea -sides 81 of the originally formed openings 80 provide the material in the band that allows protrusions to be formed without substantial reduction in the thickness of the band. The lateral protrusions are then punched again (in the same manner as described with respect to ., . , . . .. ~ . . .. ......... .
1~34Z644 .
Figure 12) in order to fo-rn transverse shouLders 84 with recesses g6 therebetween (see Figure 16).
From the above it is seen that by the present invention the collar or band is treated and sha~ed to form a strong and conven-ient mount for assembly of the saddle housing with the band. More-over the process allows the flexible band to be formed initially onLy as wide as required for tne co~pleted collar. This results in a su~-stantial savings of material as co~pared to previously proposed structures with a resulting reduction in manufacturing costs. The process is performed by a series of relatively simple operations on the band to achieve the desired shape; and the resulting transverse shoulders provide substantial strength in the final asse~bly at the critical point in the collar where stresses are transmitted from the saddle housing to the flexible band.
Although illustrative embodiments of the present inven-tion have been described herein with reference to the accompanying drawings it is to be understood that the invention is not limited to those precise embodiments thereof but that various changes and modif-ications may be effected therein by one skilled in the art without departing from the scope or sp_rit of this invention.
- . -:
Screw-type clamping collars are a well known means or connecting flexible hoses or collars to'other structures such a~
pipes. Such collars are particularly useful in the automotive f~eld.
The usual screw-type flexible collar includes a screw mounted for free rotation inside a housing, but held in a fixed axial position within thè'housing, which is secured on one end, or near one end, of a flexible band. The o ther end of the band or coLlar is engaged, when the band is bent, between the housing'and the end of the band to which the housing is attached, so that the threads of the screw engage a corresponding toothed rack on the band. The rack begins near the ~ end of the band and extends over a suitable length of the band selected; in accordance with the sizes of the pieces or ob3ects to be clamped.
Turning of the screw adiusts the diameter of the collar and thus the cla~ping effect thereof.
A very critical point of the construction of screw-type clamping collars is the point where the saddle housing, carrying the adjusting screw, is secured to the b~nd. It is this point on the band ich sustains the entire reaction pull w'nen the screw is turned in order to pull the rack end'of the band to effect the clamping. -'This ' pull can reach a relatively very high level of efficiency in these ! ~ clamps and thus produce high strssses in the connection of thé saddLe hou~ing to the band.
Currently in order to obtain stopping and anchoring points for the saddle housing on the sides of the band, a band is , '' ~
, ,, ,, , , - . , . . , . ,. " ._ ., ., ,, . , . ~ .
1~4Z~44 generally used which is considerably wider than necessary for the clamping band or collar. Long tongues or recesses are then cut out along the edges of the band and transverse lugs are put on both sides of the recesses which then receive the corres-ponding lugs of the saddle housing. The housing lugs are thenturned down or bent and sturdily positioned in a fixed position along the under sides of the band.
This mode of execution is costly since it involves using a band which is larger or wider than necessary, and there is thus a considerable loss of material.
It is an object of the process according to the invention to remedy these disadvantages.
According to an aspect of the present invention the so-called flexible band or collar is of a screw-type clamping collar made from a malleable strip of material, i.e. metal or other suitable materials in a width only as wide as the desired width necessary for the flexible collar. One end of this band is then either hot or cold stamped at predetermined locations on the edge of the end to force material at those places laterally outwardly and form transverse shoulders defining the desired stops for the saddle housing with sufficient , rigidity and strength to withstand the pulling force applied to the clamping collars.
In accordance with the present invention there is provided a method of treating a flexible band for use in a screw-type clamping collar having a saddle housing including a pair of spaced legs thereon comprising the steps of forming the flexible band of malleable material in a predetermined width; stamping one of said band along its edges to extend , 30 the material of the band beyond the edges thereof and form ,' ~ ~ 2 -, ~
1~42644 transverse shoulders on said band edges in spaced relation to each other, whereby the legs of said housing may be placed between the shoulders and bent under the band with said shoulders, integral with the band, and resisting longitudinal movement of the housing along the band and the forces applied thereto when the clamp is used.
The above, and other objects, features and advantages of the present invention will be apparent in the following detailed description of an illustrative embodiment thereof which is to be read in connection with the accompanying drawings, wherein.
Figure 1 is a perspective view of a screw-type clamp-ing collar according to the present invention;
- 2a -~4Z644 Figure 2 is an e~ploded side ,view of the clamping collar of Figure 1, showing the individual elements ma~ing up the collar;
Figures 3 and 4 are schematic sectional views show-ing the process of making transverse shoulders in the collar or band, wherein Figure 3 illustrates the punch and anvil before the operation and Figure 4 illustrates the end of the operation;
Figure 5 is a top plan view of the anvil of Figures 3 and 4 with the band placed on the anvil and after completion of ~he punching operation;
Figure 6 is a partial exploded perspective view of the finished band ready for assembly with a screw-bearing saddle housing;
Figure 7 is a transverse sectional view, on an enlarged scale, showing the band assembled on the saddle housing;
Figures 8, 10 and 12 are schematic side sectional views, similar to Figures 3 and 4, illustrating another punch and anvil arrangement for use in forming transverse stops on the.band;
Figures 9, 11 and 13 are plan views of the band respe~-tively showing the configuration of the band after treatment in the apparatus shown in Figures 8, 10 and 12 respectively; and Figures 14, 15 and 16 are top plan views of another band illustrating another method of making transverse stop shoulders on the band.
Referring now to the drawings in detail, and initially to Figure 1 thereof, a screw-type clam~ing collar 10 constructed by use of the method ~f the present invention is illustrated which includes a flexible band 11, a saddle housing 12, and a scrEw 13.
, , .
- ~42644 `.
The latter is mounted in any known manner or free rotation inside housing 12, but is held by the housing in a fixed axial po3ition.
The saddle housing, with its screw 13,' is mounted adjacent one end 14 of flexible band"ll. The band has at its other end 16 a number of transverse openings 18 formed therein which define a gear rack that engages and cooperates with the thrèads o screw 13> when t'nis end is engaged in the housing between the screw and the end 14 of the band.
The flexible band or collar 11 is preferably formed of a malleable material, such as metal, with a uniform width L
selected to be the width necessary for the use to which the clamp is to be placed. The length of the band is cut such that the band will make, after rolling, a collar having a specific diameter.
In accordance with the present invention, the end 14 of the band is placed on an anvil or bos;s 16 which has longitudinal guiding tracks 18 formed in raised parts 20 thereon. The band rests on four bosses 22 formed in the base of the anvil. Each bo~s has a rectangular top surface in plan which slopes (as seen in Figure 3) fro~ a point near the median axis of the band downwardly and away from the band. Between the boss'es, clearings or recesses 24 are formed in the anvil to enable the passage o tongs 26 carried by a reciprocal punch head 28.
As seen in Figure 4,when punch head 28 is operated downwardly, in the line of arrow F, (as'for egample by a cam or the like in the conventional manner) the tongs or punches 26 penetrate into the anvil recesses 24 and the -bottom 30 of the punch head engages the flex~ble band 11. The striking of the band in this m~nner pushe's the malléable material of the band laterally in the direction of arrows , .
, ~4~
s - ... . _ .. _.. __, .. ~
1~4Z644 f, to form the pairs of stops or shoulders ~2 on the band. At the same time, the tongs 24 prevent the band material from ~lowing between these snoulders and tr.us form recesses 34 therebetween (see Figure 6).
Additional operations may be performed on the band end 14 by cutting a central opening 36 therein forming a profiled end 3~
as shown in Figure 6. These operations can be performed in any known . .
manner.
The saddle housing 12, having screw 3 mounted therein is secured to the end 14 of band 11 by its lugs 40 which are initially straight and placed between the respective pairs of shoulders 32 (see Figure 6) until its own shoulders 42 engage the stops 32. The lugs are then turned or bent down under the band to complete the assembly (see Figure 7).
The flexible band 11 can also be shaped to form shoulders 32 by the apparatus illustrated in Figures 8 to 13. As seen therein the end 14 of band 11 is placed and properly guided in guide tracks or the like on an anvil or base 44 having an opening 46 therein. A
reciprocal punch-caxrier 49 having apunch 50 mounted thereon is guided in a pressure plate 52 above anvil 44. The carrier and plate are reciprocated in any known manner to cause the punch to cooperate with the anvil and punch or cut a median slot 54 having bulged-out or rounded ends 56 in the median portions of band 11 (see Figure 9).
The slotted band end is then placed and guided on a second anvil 58 having, underneath the positions at which the band is supported, two laterally movable parts 60 biased by springs 62. A second punch assembly incluidng a reciprocal punch carrier 64, a punch 66 and a pressure plate 68 are located above this second anvil and operation , ~ 1~4'~644 ~h~r~ a~ainst the anvil will cause th2 second punch 6~, which is wider than punch 50, to penetrate slot 56 and move the anvil parts 60 apart from each other, against the bias of the springs thus forcing the band material to move adjacent slot 56 to form protuberances 64, while the conical punch 66 expan~s slot 56 (see Figures 10 and 11).
The end 14 of band ll is then placed and guided on a third anviL 67 where it is held in place by a reciprocal pressure plate 68 in which three punches 70, 72,74 are slidable. These punches are carried by a reciprocal punch-carrier 76. Upon operation or reciprocation of carrier 76 toward anvil 67 (which has complementary openings therein) the punches 72, 74 form the desired shoulders 32 separated by recesses or spaces 24 (see Figures 12 and 13) and the punch 72 further widens slot 54. If desired the punch may be designed to also cut the end 16 of the band (see Figure 13) to form a profiled end.
According to another embodiment of the invent~on Cshown in Figures 14, 15 and 16) band 11 is, in a first operation, punched (in a process similar to that sho~n in Figure 8) to form generally bow-tie shaped openings 80 therein in slightly spaced relation to each other (see Figure 14~. These openings have inwardly curved sides 81. The band is then punched again, between a punch and anvil (in t'ne same manner as described above with respect to Figure 10) in order to move the side edges of the band.forming lateral protrusions 82, while enlarging openings 86 (see Figure 15). The inwardly curvea -sides 81 of the originally formed openings 80 provide the material in the band that allows protrusions to be formed without substantial reduction in the thickness of the band. The lateral protrusions are then punched again (in the same manner as described with respect to ., . , . . .. ~ . . .. ......... .
1~34Z644 .
Figure 12) in order to fo-rn transverse shouLders 84 with recesses g6 therebetween (see Figure 16).
From the above it is seen that by the present invention the collar or band is treated and sha~ed to form a strong and conven-ient mount for assembly of the saddle housing with the band. More-over the process allows the flexible band to be formed initially onLy as wide as required for tne co~pleted collar. This results in a su~-stantial savings of material as co~pared to previously proposed structures with a resulting reduction in manufacturing costs. The process is performed by a series of relatively simple operations on the band to achieve the desired shape; and the resulting transverse shoulders provide substantial strength in the final asse~bly at the critical point in the collar where stresses are transmitted from the saddle housing to the flexible band.
Although illustrative embodiments of the present inven-tion have been described herein with reference to the accompanying drawings it is to be understood that the invention is not limited to those precise embodiments thereof but that various changes and modif-ications may be effected therein by one skilled in the art without departing from the scope or sp_rit of this invention.
- . -:
Claims (19)
1. The method of treating a flexible band for use in a screw-type clamping collar having a saddle housing including a pair of spaced legs thereon comprising the steps of forming the flexible band of malleable material in a predetermined width; stamp-ing one end of said band along its edges to extend the material of the band beyond the edges thereof and form transverse shoulders on said band edges in spaced relation to each other, whereby the legs of said housing may be placed between the shoulders and bent under the band with said shoulders, integral with the band, and resisting longitudinal movement of the housing along the band and the forces applied thereto when the clamp is used.
2. The method as defined in Claim 1 wherein said stamping step comprises the step of cold stamping said shoulders in the band material.
3. The method as defined in Claim 1 wherein said stamping step comprises the step of hot stamping said shoulders in the band material.
4. The method as defined in Claim 1 wherein said stamping step comprises the step of positioning said band in a stamping press on an anvil shaped to allow lateral movement of the band material with respect to the band edges at the points on the band where the shoulders are to be formed; and striking the band on the anvil to force the material of the band laterally outwardly at said points to form said transverse shoulders.
5. The method of treating a flexible band for use in a screw-type clamping collar having a saddle housing including a pair of spaced legs thereon comprising the steps of forming the flexible band of malleable material in a predetermined width, stamping one end of said band along its edges to extend the material of a predetermined portion of the band beyond the edges thereof and form transverse shoulders on said band edges in spaced relation to each other, whereby the legs of said housing may be placed between the shoulders and bent under the band with said shoulders, integral with the band, resisting longitudinal movement of the housing along the band and the forces applied thereto when the clamp is used; said stamping step comprising the steps of cutting an elongated slot in said one end of said band along its median axis in a length sub-stantially equal to the desired spacing between shoulders on opposite sides of the band; enlarging said slot laterally by pushing the side edges of the slot, between an anvil and pressure plate, laterally outwardly towards adjacent edges of the band without changing the thickness of said band; and punching the pushed out edges of the band to form recesses therein which define spaced transverse shoulders on the edges of the band.
6. The method as defined in claim 5 wherein said punching step includes the step of holding the band firmly in position on an anvil by engaging a rigid member in the slot of the band during the punching operation.
7. The method of treating a flexible band for use in a screw-type clamping collar having a saddle housing including a pair of spaced legs thereon comprising the steps of forming the flexible band of malleable material in a pre-determined width; stamping a predetermined portion of one end of said band along its edges to extend the material of said predetermined portion of the band beyond the edges thereof and form transverse shoulders on said band edges in spaced relation to each other, whereby the legs of said housing may be placed between the shoulders and bent under the band with said shoulders, integral with the band, resisting longitudinal movement of the housing along the band and forces applied thereto when the clamp is used; said stamping step comprising the steps of placing said one end of the band on a first anvil beneath a cutting die and cutting an elongated slot in said band; thereafter placing the slotted band end on a second anvil, having laterally movable elements below a punch and inserting said punch in said slot and between said movable elements to laterally expand said slot and said band adjacent the slot as said movable anvil elements are moved apart without changing the thickness of said band; and thence placing said slotted end of the band on a third anvil below a second die and using said second die to cut recesses in the expanded edges of the die band, thereby to form said space stop transverse shoulders of the band.
8. The method as defined in claim 7 including the step of further enlarging said slot as the edges of said band are cut.
9. The method as defined in claim 1, 2 or 3, wherein said stamp-ing step includes the step of cutting a pair of spaced open-ings in said band along its median axis at said one end thereof, said opening being spaced apart a distance substantially equal to the desired distance between the transverse shoulders;
enlarging said openings by pushing the sides thereof laterally outwardly towards adjacent edges of the band to form adjacent bulges in the band on its side edges; and punching said bulges along the band edges to form outwardly extending transverse shoulders.
enlarging said openings by pushing the sides thereof laterally outwardly towards adjacent edges of the band to form adjacent bulges in the band on its side edges; and punching said bulges along the band edges to form outwardly extending transverse shoulders.
10. A method as defined in claim 4 wherein said anvil has tracks formed therein for holding said one end of the band in a fixed position and a plurality of bosses between the tracks located to be below said band, said bosses being profiled and sloped in height, with their highest point adjacent the median axis of the band in said tracks, to force the material of the band laterally outwardly from the side edges thereof.
11. A method for shaping a flexible collar for use in a screw-type clamping collar comprising the steps of forming a flexible collar from an elongated strip of malleable material in a width as wide as the desired width of the flexible collar;
striking the collar adjacent the ends thereof and forcing material along the edges of the collar outwardly of the edges at predetermined positions, thereby to form transverse stop shoulders on the collar edges defining stops of sufficient rigidity and strength to withstand the pulling force applied to the clamping collar.
striking the collar adjacent the ends thereof and forcing material along the edges of the collar outwardly of the edges at predetermined positions, thereby to form transverse stop shoulders on the collar edges defining stops of sufficient rigidity and strength to withstand the pulling force applied to the clamping collar.
12. A method according to claim 11, wherein said striking step comprises the step of flattening the collar material at said predetermined positions, between a punch and an anvil shaped to permit the said material to move and be forced out laterally of the collar edges; said anvil being shaped to form the moving material of the band into said transverse shoulders.
13. The method according to claim 12 wherein said anvil includes bosses located below said one end of said collar suitably profiled and sloped in their height, with their highest point being closest to the median axis in the width of the collar, so as to force out the material of the collar laterally outwardly, to form the transverse shoulders with a thickness appreciably corresponding to that of the collar, said anvil including longitudinal tracks formed therein for firmly holding said collar in position.
14. A method for shaping a flexible collar for use in a screw-type clamping collar comprising the steps of forming a flexible collar from an elongated strip of malleable material in a width as wide as the desired width of the flexible collar; striking the collar adjacent the ends thereof and forcing material along the edges of the collar outwardly of the edges at predetermined positions, thereby to form transverse stop shoulders on the collar edges defining stops of sufficient rigidity and strength to withstand the pulling force applied to the clamping collar; said striking step including the step of cutting out a slot in the median axis in the width of the collar, over a length approximately equal to the desired length between pairs of stopping shoulders, and of the space which separates them, on opposite sides of the collar; pushing the sides of the slot transversely apart towards the adjacent sides of the collar; and thence, punching the forced-out edges of the collar to form said stop shoulders.
15. A method according to claim 14, wherein said punching step includes the step of engaging said slot with a band member to firmly hold the collar in position.
16. A method according to claim 15, wherein the ends of the slot are cut out larger than the remainder of the slots, and are rounded, to eliminate any possible splits in the collar.
17. A method for shaping a flexible collar for use in a screw-type clamping collar comprising the steps of forming a flexible collar from an elongated strip of malleable material in a width as wide as the desired width of the flexible collar;
striking the collar adjacent the ends thereof and forcing material along the edges of the collar outwardly of the edges at predetermined positions, thereby to form transverse stop shoulders on the collar edges defining stops of sufficient rigidity and strength to withstand the pulling force applied to the clamping collar; said striking step comprising the steps of placing said one end of said collar between an anvil and a reciprocal punch, and thence operating the punch to cut an initial slot in the collar; thereafter placing said collar between a second punch and a second anvil including laterally movable elements, inserting said punch in said slot and between said elements and separating the elements from each other under the force of pressure while expanding the slot laterally towards the sides of the collar; and thence placing the collar between a third anvil and a third punch and operating the punch to form said transverse shoulders on the lateral edges of the collar forced out by the lateral punches, while simultaneously further enlarging the median slot.
striking the collar adjacent the ends thereof and forcing material along the edges of the collar outwardly of the edges at predetermined positions, thereby to form transverse stop shoulders on the collar edges defining stops of sufficient rigidity and strength to withstand the pulling force applied to the clamping collar; said striking step comprising the steps of placing said one end of said collar between an anvil and a reciprocal punch, and thence operating the punch to cut an initial slot in the collar; thereafter placing said collar between a second punch and a second anvil including laterally movable elements, inserting said punch in said slot and between said elements and separating the elements from each other under the force of pressure while expanding the slot laterally towards the sides of the collar; and thence placing the collar between a third anvil and a third punch and operating the punch to form said transverse shoulders on the lateral edges of the collar forced out by the lateral punches, while simultaneously further enlarging the median slot.
18. A method according to claim 11 wherein said striking step includes the steps of cutting out two spaced openings along the median axis of the collar at said one end thereof, said openings being spaced apart a distance substantially equal to the distance between the stops to be formed; pushing the sides of these openings transversely towards the edges of the collar to form forced out edge portions thereon adjacent the openings, and thence punching said forced-out edges in order to form said shoulders.
19. A method according to claim 12 wherein said openings are cut initially in a bow-tie shape having arcuate longitu-dinal sides approaching each other at the center of the collar and enlarged ends.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7518313A FR2313583A1 (en) | 1975-06-04 | 1975-06-04 | METHOD AND MEANS OF MAKING A SCREW-TYPE TIGHTENING COLLAR, AND THE COLLARS OBTAINED BY THIS PROCESS AND THESE MEANS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1042644A true CA1042644A (en) | 1978-11-21 |
Family
ID=9156384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA253,829A Expired CA1042644A (en) | 1975-06-04 | 1976-06-01 | Method of shaping a screw type clamping collar |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS5211360A (en) |
| AU (1) | AU502813B2 (en) |
| BE (1) | BE842425A (en) |
| CA (1) | CA1042644A (en) |
| FR (1) | FR2313583A1 (en) |
| GB (1) | GB1509647A (en) |
| IT (1) | IT1062959B (en) |
| ZA (1) | ZA763273B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH661218A5 (en) * | 1982-09-10 | 1987-07-15 | Mo Avtomobilnyj Zavod Im I A L | METHOD FOR PRODUCING A SCREW CLAMP AND SUCH A SCREW CLAMP. |
| JPS62215190A (en) * | 1986-03-14 | 1987-09-21 | 澤久工業株式会社 | Hose clamp and manufacture thereof |
| FR2639088B1 (en) * | 1988-11-17 | 1990-12-28 | Caoutchouc Manuf Plastique | COUPLING FOR FLEXIBLE PIPE WITH INTERLOCKING BY TURNING O-RING ON A LOW ANGLE CONE |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2136677C2 (en) * | 1971-07-22 | 1983-08-11 | Pebra Gmbh, Paul Braun, 7300 Esslingen | Tensioning strap for hose clamp - has teeth embossed in one end and raised saddle between edge slots at other end |
-
1975
- 1975-06-04 FR FR7518313A patent/FR2313583A1/en active Granted
-
1976
- 1976-05-31 BE BE6045521A patent/BE842425A/en unknown
- 1976-05-31 AU AU14448/76A patent/AU502813B2/en not_active Expired
- 1976-06-01 CA CA253,829A patent/CA1042644A/en not_active Expired
- 1976-06-02 ZA ZA763273A patent/ZA763273B/en unknown
- 1976-06-03 JP JP51065086A patent/JPS5211360A/en active Pending
- 1976-06-03 IT IT23899/76A patent/IT1062959B/en active
- 1976-06-04 GB GB23269/76A patent/GB1509647A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE842425A (en) | 1976-09-16 |
| FR2313583A1 (en) | 1976-12-31 |
| GB1509647A (en) | 1978-05-04 |
| ZA763273B (en) | 1977-05-25 |
| AU502813B2 (en) | 1979-08-09 |
| AU1444876A (en) | 1977-12-08 |
| FR2313583B1 (en) | 1978-02-24 |
| JPS5211360A (en) | 1977-01-28 |
| IT1062959B (en) | 1985-02-11 |
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