CA1096593A - Method for joining fiberglass plastic rod to metal fitting of electrical device - Google Patents
Method for joining fiberglass plastic rod to metal fitting of electrical deviceInfo
- Publication number
- CA1096593A CA1096593A CA309,387A CA309387A CA1096593A CA 1096593 A CA1096593 A CA 1096593A CA 309387 A CA309387 A CA 309387A CA 1096593 A CA1096593 A CA 1096593A
- Authority
- CA
- Canada
- Prior art keywords
- rod
- metal fitting
- plastic rod
- fiberglass
- joining
- 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
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
METHOD FOR JOINING FIBERGLASS PLASTIC
ROD TO METAL FITTING OF ELECTRICAL
ABSTRACT OF THE DISCLOSURE
According to the method for joining a fiberglass plas-tic rod to a metal fitting of an electrical device, a hole is first provided in the metal fitting, the diameter of said hole being somewhat greater than that of the fiberglass plas-tic rod. One of the rod's ends is then installed in the hole, and the gap between the metal fitting and fiberglass plastic rod is filled with a porous material. The whole is then com-pressed by using the pulse loading technique. The use of pulse loading for joining the fiberglass plastic rod to the metal fitting makes it possible to develop a high pressure in the zone of the joint without destroying the rod; this task is facilitated by the presence of the porous layer between the rod and metal fitting Compression by pulse loading does not necessitate the use of expensive equipment, nor does it impose stringent accuracy requirements upon the elements to be joined.
The method according to the invention accounts for a desired distribution of pressure over the inbuilt end of the fiber-glass plastic rod.
ROD TO METAL FITTING OF ELECTRICAL
ABSTRACT OF THE DISCLOSURE
According to the method for joining a fiberglass plas-tic rod to a metal fitting of an electrical device, a hole is first provided in the metal fitting, the diameter of said hole being somewhat greater than that of the fiberglass plas-tic rod. One of the rod's ends is then installed in the hole, and the gap between the metal fitting and fiberglass plastic rod is filled with a porous material. The whole is then com-pressed by using the pulse loading technique. The use of pulse loading for joining the fiberglass plastic rod to the metal fitting makes it possible to develop a high pressure in the zone of the joint without destroying the rod; this task is facilitated by the presence of the porous layer between the rod and metal fitting Compression by pulse loading does not necessitate the use of expensive equipment, nor does it impose stringent accuracy requirements upon the elements to be joined.
The method according to the invention accounts for a desired distribution of pressure over the inbuilt end of the fiber-glass plastic rod.
Description
~3 '~itle o~ t~e Invention ME'~HOD FOR JOI~ING FIB~RGL~SS PLASTIC ROD ~O ME~
ING O~ ~LEC'~RICAL DEVICE
Field o~ the Invention '~he present inventao~ relates to electrical engineering and, more particularly, to methods for joining fiberglass plas-tic rods to metal fittings of electrical devices.
'~he invention is applicable to the manufacture of car-rier fittings o~ ~iberglass plastic insulators, spacers~ ~uys, breaker rods, etc.
Background of the Invention A fiberglass plastic rod must be joined to a metal fit~-ing so as to ensure a high strength of the unit.
'~here is known a method for joining a fiberglass plastic rod to a metal fitting of an electrical device, whereby one of the ends o~ the fiberglass plastic rod is sawed along the rod'S axis into two part5 which are then wedged apart in the cone-shaped cavity of the metal ~itting.
- ` 'The method i disadvantage~us in that the weding affects t~e mechanical characteristics of the rod. Anoth~r disadvant-a~e of th~s method lies in a concentration of meohanical stres-ses at the place where the fibergla3s plastic rod comes out - o~ the metal fitting.
here is ~urther known a method for joining a ~iberglass ~`4 ~- - : ' . `
plastic rod to a metal fit-ting of an electrical device (cf.
Elettrificazione, No 6, 1971), according to which a hole o-E a diameter somewhat in excess of that of the fiberglass plastic rod is provided in the metal fitting to receive one of the ends of the fiberglass plastic rod. The whole unit is then pressed on a hydraulic press.
The joining must he done so as to provide a uniform compression, ensure a desired distribution of pressure over the length of the built-in portion of the rod, and keep the rod intact under pressure. To achieve these goals, one must use dies of complex shapes and impose stringent accuracy to size requirements on the metal fittings and fiberglass plastic rods.
Summary of the Invention It is an object of the present invention to improve the mechanical strength of the joint between the fiberglass plastic rod and metal fitting.
It is another object of the invention to simplify the joining process.
In accordance with a speci-fic embodiment, a method for joining a fiberglass plastic rod to a metal fitting of an electrical device, comprises the steps of: providing a hole in said metal fitting, the diameter of said hole being somewhat greater than that of said fiberglass plastic rod, inserting one of the ends of said fiberglass plastic rod into said hole ;~ ~ - 3 -~ Q ~ ~ 3 filling the gap between said fiberglass plastic rod and said metal fitting with a porous material to form a porous layer, compressing said metal fitting by pulse loading.
The porous layer may comprise a powdered material, as well as a metal grid or fibrous structure.
Thie use of pulse loading for joining the fiber-glass plastic rod to the metal fitting makes it possible to develop,without destroying the fiberglass plastic rod, a much hi~her pressure in the zone of the joint than in the case of the conventional methods discussed above. This task is simplified by the presence of the porous layer between the rod and fitting. Pulse loading does not necessitate the use of expensive equipment; nor does it impose stringent accuracy to size requirements upon the elements to be joined.
The method according to the invention makes it possible to achieve a desired distribution of pressure over the inbuilt end of the fiberglass plastic rod.
Brief Description of the Accompanying Drawings Other objects and advantages of the present inven-tion will become more apparent from the following detailed des-,3 ,, "~ ,, ~6593 cription of preferred embodiments t~ereo~, ta1~e~ in conaunctionwith the accompan~ing drawings~ wherein:
~ ig. 1 is an elevation view of a fiberglass plastic rod with one o~ its ends arranged in a metal terminator prior to compression, in acc~rdance with the invention;
Fig. 2 is an elevation view of a ~iberglass plastic rod with one o~ its ends arranged in a metal terminator o~ a vari-able thickness prior to compression, in accordance with the , invention;
Fig. 3 is an elevation view o~ the rod and terminator o~ Fig. 1 with a layer of an explosive o~ a variable thickness ig. 4 is an isometric view o~ a terminator with ~our built-in ~iberglass plastic rods, in accordance with the in-vention;
~ ig. 5 is an isometric view o~ a metal connection fitt-ing with two built-in ~iberglass plastic rods, in accordance with the invention.
` Detailed Descripbion of the Invention '~he method ~or joini~g a ~iberglass plastic rod to a metal ~ittin~ will now be descrlbed in greater detail with re-~erence to the case when pulse ~oading is e~ected by means o~ an explosion~
A XibeFglass plastic rod 1 (Fig. 1) is joined to-a metal .
: :
' ~6~;93 ting 2, for example, a terminator (the re~ere~ce numeral 2 will henceforth desig~ate a terminator) as ~ollows. In the me-tal termlnator 2 there~is provided a hole ol a diame~er somewhat pjreater than that o~ the fiberglass plastic rod 1. One ol the ends o~ the rod 1 is placed into the hole, and t~e gap betYleen the terminator 2 and rod 1 is filled with a porous material to form a porous la~er 30 ~he function o~ the layer 3 is to absorb impact energy and compress under impact loads.
~ he porous layer 3 ma~ comprise a powdered material, par-ticularly, powders o~ metals, o~ides, nitrides 7 carbides and mi~tures thereo~, e.g. Al~ Cr, A1203 9 AlN, ~ ~ Ni, W~. ~he po-rous layer 3 may comprise a mixture of metal powder and ceramics, or powdered aluminum nitride. The particle size is dependent upon the width o~ the gap between the rod 1 and terminator 2 and varies from a few microns to O.l of the gap ~idth. The gap is filled a~ter one o~ the e~ds of the rod 1 is installed in the hole provided in the terminator 2.
~ he porous layer 3 may comprise a metal grid or ~ibrous structure, for example, metal mesh, wire, chips, etc., in which case the porous layer ~ is formed directly over the end o~ the ~iberglass plastic rod 1; whereupon that end is installed in the hole provided in the termi~ator 2. The thickness OL the grid or mesh, the wire ~auge~ etc. are depende~t on the width ol the ' ~65~:~
gap between the rod 1 and terminator 2.
; A layer 4 o~ an e~plosive is then symmetrically arraar~ed over the outer surface o~' the metal terminator 2. n'he ezplo-sive may be ammonite. ~he la~er 4 may be ~ormed by a bag con-taining a powdered e~plosive. The explosive may also be used in the ~orm of cast or pressed charges, or be applied onto ^-some ~abric.
The terminator 2 with its ~iberglass rod 1 are t;1e~ plac-ed on a metal plate, whereupon an explosion is made 7 for e~-ample, with the aid o~ a blasting cap 6 and detonating cords 7.
~ s,the layer 4 detonates on the surface o~ the metal ter-minator 2I the latter compres.ses the porous layer ~. ~he role o~ the porous layer 3 is to reduce e~cessive impact loads on and to provide ~or rnore uni~orm loading o~ the ~iberglass plas-tic rod 1 in the course o~ pulse loading. As the layer 3 com-presses, it acquires a considerable shear strength, w~ereby the ~iberglass plastic rod 1 is reliably joined to the metal terminator 2.
~ y appropriately selecting the shape o~ the metal ~itt-ing, which in the present case is the terminator 2, one can ensure a desired distribution o~ pressure over the length oD
the built-in portion o~ the rod 1. Strength requirements may call ~or a ma~imum pressure' at the center o~ that portion.
10~;5~3 ~his object may be attained by varying the tnic'~ness o~ t~e terminator 2, as well as the thickness G~ the la~er 4 o~ e~-plosive and i~s concentration around the built-in portion o~ the rod 1.
According to ~ig~ 2, the metal terminator 2 is o a va-riable thickness which is at its minimum on section A - A, where a ma~imum pressure is produced. A similar effect is o'o-served with a variable thickness o~ the layer 4 o~ e~plosive around the terminator 2 (~ig. 3). ~ ma~irnum tnickness o~ t~e layer 4 on section A - ~ accounts for a maximum pressure in that zone.
By changing the co~centration o~ the layer 4 o~ explo-sive around the metal terminator 2 (~ig. 1), for exarnple, b~
increasing the concentration at the center and reducing it at the ends of said terminator 2, one can produce a maxirnum pressure in the central portion o~ the terminator 2.
The method according to the invention makes it possible to join a plurality o~ ~iberglass plastic rods 1 to a single metal terminator 2 (~1g. 4). For this purpose 7 a plurality OL
oles in a number corresponding to that o~ the rods 1 are sym-rnetrically made in the terminator 2 around its central axis.
~ach o~ said holes receives one end o~ a res ective rod 1, all t~e remaining operations being per~ormed as described above.
According to the invention, it is also possible to join .
iS93 ~iberglass plastic rods 1 (Fig. 5) by means o~ a metal con~
nection ~itting 8. ~rhis may come in handy in repair.ing ~uys, spacers, etc.
Pulse loading a~d the resultant compression of the me-tal ~itting may be e~ected in other ways, ~or examp1e, magne-to~ydrodynamically 9 i.e. by an electromagnetic field.
.
,
ING O~ ~LEC'~RICAL DEVICE
Field o~ the Invention '~he present inventao~ relates to electrical engineering and, more particularly, to methods for joining fiberglass plas-tic rods to metal fittings of electrical devices.
'~he invention is applicable to the manufacture of car-rier fittings o~ ~iberglass plastic insulators, spacers~ ~uys, breaker rods, etc.
Background of the Invention A fiberglass plastic rod must be joined to a metal fit~-ing so as to ensure a high strength of the unit.
'~here is known a method for joining a fiberglass plastic rod to a metal fitting of an electrical device, whereby one of the ends o~ the fiberglass plastic rod is sawed along the rod'S axis into two part5 which are then wedged apart in the cone-shaped cavity of the metal ~itting.
- ` 'The method i disadvantage~us in that the weding affects t~e mechanical characteristics of the rod. Anoth~r disadvant-a~e of th~s method lies in a concentration of meohanical stres-ses at the place where the fibergla3s plastic rod comes out - o~ the metal fitting.
here is ~urther known a method for joining a ~iberglass ~`4 ~- - : ' . `
plastic rod to a metal fit-ting of an electrical device (cf.
Elettrificazione, No 6, 1971), according to which a hole o-E a diameter somewhat in excess of that of the fiberglass plastic rod is provided in the metal fitting to receive one of the ends of the fiberglass plastic rod. The whole unit is then pressed on a hydraulic press.
The joining must he done so as to provide a uniform compression, ensure a desired distribution of pressure over the length of the built-in portion of the rod, and keep the rod intact under pressure. To achieve these goals, one must use dies of complex shapes and impose stringent accuracy to size requirements on the metal fittings and fiberglass plastic rods.
Summary of the Invention It is an object of the present invention to improve the mechanical strength of the joint between the fiberglass plastic rod and metal fitting.
It is another object of the invention to simplify the joining process.
In accordance with a speci-fic embodiment, a method for joining a fiberglass plastic rod to a metal fitting of an electrical device, comprises the steps of: providing a hole in said metal fitting, the diameter of said hole being somewhat greater than that of said fiberglass plastic rod, inserting one of the ends of said fiberglass plastic rod into said hole ;~ ~ - 3 -~ Q ~ ~ 3 filling the gap between said fiberglass plastic rod and said metal fitting with a porous material to form a porous layer, compressing said metal fitting by pulse loading.
The porous layer may comprise a powdered material, as well as a metal grid or fibrous structure.
Thie use of pulse loading for joining the fiber-glass plastic rod to the metal fitting makes it possible to develop,without destroying the fiberglass plastic rod, a much hi~her pressure in the zone of the joint than in the case of the conventional methods discussed above. This task is simplified by the presence of the porous layer between the rod and fitting. Pulse loading does not necessitate the use of expensive equipment; nor does it impose stringent accuracy to size requirements upon the elements to be joined.
The method according to the invention makes it possible to achieve a desired distribution of pressure over the inbuilt end of the fiberglass plastic rod.
Brief Description of the Accompanying Drawings Other objects and advantages of the present inven-tion will become more apparent from the following detailed des-,3 ,, "~ ,, ~6593 cription of preferred embodiments t~ereo~, ta1~e~ in conaunctionwith the accompan~ing drawings~ wherein:
~ ig. 1 is an elevation view of a fiberglass plastic rod with one o~ its ends arranged in a metal terminator prior to compression, in acc~rdance with the invention;
Fig. 2 is an elevation view of a ~iberglass plastic rod with one o~ its ends arranged in a metal terminator o~ a vari-able thickness prior to compression, in accordance with the , invention;
Fig. 3 is an elevation view o~ the rod and terminator o~ Fig. 1 with a layer of an explosive o~ a variable thickness ig. 4 is an isometric view o~ a terminator with ~our built-in ~iberglass plastic rods, in accordance with the in-vention;
~ ig. 5 is an isometric view o~ a metal connection fitt-ing with two built-in ~iberglass plastic rods, in accordance with the invention.
` Detailed Descripbion of the Invention '~he method ~or joini~g a ~iberglass plastic rod to a metal ~ittin~ will now be descrlbed in greater detail with re-~erence to the case when pulse ~oading is e~ected by means o~ an explosion~
A XibeFglass plastic rod 1 (Fig. 1) is joined to-a metal .
: :
' ~6~;93 ting 2, for example, a terminator (the re~ere~ce numeral 2 will henceforth desig~ate a terminator) as ~ollows. In the me-tal termlnator 2 there~is provided a hole ol a diame~er somewhat pjreater than that o~ the fiberglass plastic rod 1. One ol the ends o~ the rod 1 is placed into the hole, and t~e gap betYleen the terminator 2 and rod 1 is filled with a porous material to form a porous la~er 30 ~he function o~ the layer 3 is to absorb impact energy and compress under impact loads.
~ he porous layer 3 ma~ comprise a powdered material, par-ticularly, powders o~ metals, o~ides, nitrides 7 carbides and mi~tures thereo~, e.g. Al~ Cr, A1203 9 AlN, ~ ~ Ni, W~. ~he po-rous layer 3 may comprise a mixture of metal powder and ceramics, or powdered aluminum nitride. The particle size is dependent upon the width o~ the gap between the rod 1 and terminator 2 and varies from a few microns to O.l of the gap ~idth. The gap is filled a~ter one o~ the e~ds of the rod 1 is installed in the hole provided in the terminator 2.
~ he porous layer 3 may comprise a metal grid or ~ibrous structure, for example, metal mesh, wire, chips, etc., in which case the porous layer ~ is formed directly over the end o~ the ~iberglass plastic rod 1; whereupon that end is installed in the hole provided in the termi~ator 2. The thickness OL the grid or mesh, the wire ~auge~ etc. are depende~t on the width ol the ' ~65~:~
gap between the rod 1 and terminator 2.
; A layer 4 o~ an e~plosive is then symmetrically arraar~ed over the outer surface o~' the metal terminator 2. n'he ezplo-sive may be ammonite. ~he la~er 4 may be ~ormed by a bag con-taining a powdered e~plosive. The explosive may also be used in the ~orm of cast or pressed charges, or be applied onto ^-some ~abric.
The terminator 2 with its ~iberglass rod 1 are t;1e~ plac-ed on a metal plate, whereupon an explosion is made 7 for e~-ample, with the aid o~ a blasting cap 6 and detonating cords 7.
~ s,the layer 4 detonates on the surface o~ the metal ter-minator 2I the latter compres.ses the porous layer ~. ~he role o~ the porous layer 3 is to reduce e~cessive impact loads on and to provide ~or rnore uni~orm loading o~ the ~iberglass plas-tic rod 1 in the course o~ pulse loading. As the layer 3 com-presses, it acquires a considerable shear strength, w~ereby the ~iberglass plastic rod 1 is reliably joined to the metal terminator 2.
~ y appropriately selecting the shape o~ the metal ~itt-ing, which in the present case is the terminator 2, one can ensure a desired distribution o~ pressure over the length oD
the built-in portion o~ the rod 1. Strength requirements may call ~or a ma~imum pressure' at the center o~ that portion.
10~;5~3 ~his object may be attained by varying the tnic'~ness o~ t~e terminator 2, as well as the thickness G~ the la~er 4 o~ e~-plosive and i~s concentration around the built-in portion o~ the rod 1.
According to ~ig~ 2, the metal terminator 2 is o a va-riable thickness which is at its minimum on section A - A, where a ma~imum pressure is produced. A similar effect is o'o-served with a variable thickness o~ the layer 4 o~ e~plosive around the terminator 2 (~ig. 3). ~ ma~irnum tnickness o~ t~e layer 4 on section A - ~ accounts for a maximum pressure in that zone.
By changing the co~centration o~ the layer 4 o~ explo-sive around the metal terminator 2 (~ig. 1), for exarnple, b~
increasing the concentration at the center and reducing it at the ends of said terminator 2, one can produce a maxirnum pressure in the central portion o~ the terminator 2.
The method according to the invention makes it possible to join a plurality o~ ~iberglass plastic rods 1 to a single metal terminator 2 (~1g. 4). For this purpose 7 a plurality OL
oles in a number corresponding to that o~ the rods 1 are sym-rnetrically made in the terminator 2 around its central axis.
~ach o~ said holes receives one end o~ a res ective rod 1, all t~e remaining operations being per~ormed as described above.
According to the invention, it is also possible to join .
iS93 ~iberglass plastic rods 1 (Fig. 5) by means o~ a metal con~
nection ~itting 8. ~rhis may come in handy in repair.ing ~uys, spacers, etc.
Pulse loading a~d the resultant compression of the me-tal ~itting may be e~ected in other ways, ~or examp1e, magne-to~ydrodynamically 9 i.e. by an electromagnetic field.
.
,
Claims (4)
1. A method for joining a fiberglass plastic rod to a metal fitting of an electrical device, comprising the steps of:
providing a hole in said metal fitting, the diameter of said hole being somewhat greater than that of said fiber-glass plastic rod;
inserting one of the ends of said fiberglass plastic rod into said hole;
filling the gap between said fiberglass plastic rod and said metal fitting with a porous material to form a porous layer;
compressing said metal fitting by pulse loading.
providing a hole in said metal fitting, the diameter of said hole being somewhat greater than that of said fiber-glass plastic rod;
inserting one of the ends of said fiberglass plastic rod into said hole;
filling the gap between said fiberglass plastic rod and said metal fitting with a porous material to form a porous layer;
compressing said metal fitting by pulse loading.
2, A method as claimed in claim 1, whereby said porous layer comprises a powdered material.
3. A method as claimed in claim 1, whereby said porous layer comprises a metal grid structure.
4. A method as claimed in claim 1, whereby said porous layer comprises a fibrous metal structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA309,387A CA1096593A (en) | 1978-08-15 | 1978-08-15 | Method for joining fiberglass plastic rod to metal fitting of electrical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA309,387A CA1096593A (en) | 1978-08-15 | 1978-08-15 | Method for joining fiberglass plastic rod to metal fitting of electrical device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1096593A true CA1096593A (en) | 1981-03-03 |
Family
ID=4112131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA309,387A Expired CA1096593A (en) | 1978-08-15 | 1978-08-15 | Method for joining fiberglass plastic rod to metal fitting of electrical device |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1096593A (en) |
-
1978
- 1978-08-15 CA CA309,387A patent/CA1096593A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2179934C (en) | Tungsten enhanced liner for a shaped charge | |
| CA2459262C (en) | Metal fixing material bushing and method for producing a base plate of a metal fixing material bushing | |
| CA2429932C (en) | Circular shaped charge | |
| CA2409846C (en) | Coated metal particles to enhance shaped charge | |
| US3160952A (en) | Method of explosively plating particles on a part | |
| CN1207695A (en) | Electromagnetic joining or welding of metal objects | |
| CA1096593A (en) | Method for joining fiberglass plastic rod to metal fitting of electrical device | |
| EP2159533A2 (en) | Explosive cutting charge | |
| US4242787A (en) | Method for joining fiberglass plastic rod to metal fitting of electrical device | |
| CN112611279A (en) | Low-vibration high-quality blasting method | |
| RU2638066C1 (en) | Method for forming cumulative charge, device for its implementation and cumulative charge | |
| US20070227390A1 (en) | Shaped charges, lead-free liners, and methods for making lead-free liners | |
| CN212613384U (en) | Connecting structure of horizontal connecting part of reinforcing steel bars | |
| FI89115C (en) | FOERFARANDE FOER FAESTANDET AV EN RESONATORSTAV MOT ETT HOEGFREKVENSFILTERS VAEGG OCH HOEGFREKVENSFILTER | |
| US6843821B2 (en) | Filtering candles comprising a sintered filtering tube | |
| RU2049626C1 (en) | Spot welding method | |
| US4999156A (en) | Bi-dimensional compression method | |
| US4906434A (en) | Bi-dimensional compression method | |
| Baird et al. | Density–Energy Relationships in Explosive Compaction of Metal Powders | |
| CN203893761U (en) | Cylindrical surface multipoint synchronization detonation and impact loading device | |
| CN217303758U (en) | Blast hole blocking anchoring structure | |
| RU2110037C1 (en) | Shaped charge and method of its manufacture | |
| JP2000072558A (en) | Production of ceramic part having cermet body | |
| RU2007252C1 (en) | Method of riveting combined packs | |
| CN112222404B (en) | Bidirectional pressure relief device and method for preparing metal nano aluminum bar based on explosive sintering process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |