CN203426616U - Die applied to cold-pressing splicing process of metal strip used for run-through grounding line - Google Patents
Die applied to cold-pressing splicing process of metal strip used for run-through grounding line Download PDFInfo
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- CN203426616U CN203426616U CN201320471296.6U CN201320471296U CN203426616U CN 203426616 U CN203426616 U CN 203426616U CN 201320471296 U CN201320471296 U CN 201320471296U CN 203426616 U CN203426616 U CN 203426616U
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Abstract
In the prior art, electric resistance welding or argon arc welding is adopted for the splicing manner of a metal strip used for a run-through grounding line, resulting in incomplete welding seam, sunken welding seam and welding seam with a gap at the edge, so that the tensile strength of the spliced position of the obtained metal strip after being spliced is insufficient. The utility model discloses a die applied to the cold-pressing splicing process of a metal strip used for a run-through grounding line. The die comprises four movably-connected modules, wherein the four modules are mutually contacted one another under the effect of external force and form a hollow cavity in the central position, and a rectangular hole in the side edge and used for the metal strip to pass through and clamping the metal strip, when the external force is removed, the four modules separate from one another under the effect of respective springs, so that the die is enabled to apply sufficient clamping force on the metal strip in the cold-pressing welding process, a metal splicing end head is also enabled to have sufficient shaping deformation, and accordingly, the splicing of the metal strip can be smoothly realized by adopting the cold-pressing welding manner.
Description
Technical field
The utility model relates to a kind of mould for the processing processing procedure of sheet metal strip, specifically a kind of cold pressing mould of handshaking procedure of Through ground wire sheet metal strip used that is applied in.
Background technology
In the construction of high-speed railway, requirement is laid Through ground wire along trunk railway total length, guarantee that between each systems such as communication, signal, electric power, traction, power supply and equipment, realizing equipotential connects, eliminate between distinct device and system due to the electromagnetic interference that exists potential difference to cause with to the potential safety hazard that the person and equipment cause, guarantee system equipment security of operation, stable, reliable.
The sheath material of the Through ground wire using is at present brass alloys band, and the production length of this brass alloys band in actual production process is generally 600 meters of left and right, and the production length of the alloy ground wire using is generally 2000 meters or 3000 meters of left and right.For brass band and alloy ground wire are adapted, must continue to meet production and application requirement to brass band.The continuation method adopting at present, is mainly two kinds of modes of electric resistance welding or argon arc welding.These two kinds of modes all can not guarantee connecting quality, and it is mainly manifested in, and weld seam is imperfect, weld seam has depression and weld edge is jagged.Therefore when the brass alloys band to after continuing is indulged bag distortion, in the welding process of vertical packet interface, easily in the junction of brass alloys band, occur hole, and then in tube reducing drawing process, the existence due to this place's hole, makes mechanical strength little, easy fracture.In addition, adopt the continuation method of electric resistance welding or argon arc welding, the time used of often continuing once is at least wanted 40 minutes, has seriously reduced production efficiency.
Utility model content
For solving the technical problem of above-mentioned existence, can adopt Cold welding technology to continue to overcome to sheet metal strip the defect that the existing technology that continues exists.The purpose of this utility model is to provide a kind of cold pressing mould of handshaking procedure of Through ground wire sheet metal strip used that is applied in.By using this mould to carry out Cold welding to metal tape, continue, the intensity of the place's of continuing part of the metal tape after resulting continuing equates substantially with the intensity of mother metal; Joint is except having unnecessary burr projection, the situation of not being out of shape, being corroded; The resistance of joint and electric conductivity are compared with mother metal also and are not changed.
The technical scheme in the invention for solving the technical problem is: a kind of cold pressing mould of handshaking procedure of Through ground wire sheet metal strip used that is applied in, comprise halfbody one and halfbody two, wherein the structure of halfbody one and halfbody two identical and both be arranged symmetrically with; Described halfbody one comprises upper left module and upper right module, halfbody two comprises lower-left module and bottom right module, and the structure of described upper left module, upper right module, lower-left module and bottom right module is identical, described upper left module and upper right module, described lower-left module and bottom right module are symmetrical arranged respectively; Described each module is provided with a plurality of major axis pin-and-holes that extend along left and right directions and a plurality of minor axis pin-and-hole extending along the vertical direction; Between described upper left module and upper right module, be flexibly connected by major axis pin respectively between described lower-left module and bottom right module, on the outer cylinder of major axis pin, suit plays the spring of rebound effect; Between described upper left module and lower-left module, be flexibly connected by stub axle pin respectively between described upper right module and bottom right module, on the outer cylinder of stub axle pin, suit plays the spring of rebound effect.
On each module end face of forward surface that is positioned at described halfbody one and described halfbody two, be provided with the U-shaped groove that left and right directions extends, and the grooved bottom surface of described U-shaped groove is plane; At the left surface of right flank, the left surface at turning, module lower-left, described upper right, the right flank at the turning, upper right of described lower-left module and the described bottom right module upper left corner at the turning, bottom right of described upper left module, be respectively equipped with another that extend to each turning and form the groove of face.
While combining and making them to be in contact with one another separately each module: it is a rectangular through-hole that the U-shaped groove in described upper left module coordinates with U-shaped groove in the module of described lower-left, it is a rectangular through-hole that U-shaped groove in the module of described upper right also coordinates with U-shaped groove in the module of described bottom right, and the central axis of two rectangular openings point-blank overlaps; The groove combination of described each corner becomes a penetrating cavity in the vertical direction; The lower surface of the upper surface of described halfbody one, described halfbody two is all the V-type face that blind end is plane;
Also comprise two module actuating members that structure is identical, the bottom land that the medial surface of described module actuating member is provided with V-type groove and this V-type groove is plane;
The V-type groove of two described module actuating members coordinates with the upper surface of described halfbody one or the lower surface of described halfbody two respectively, and the angle of inclination, inclined-plane of described upper surface and described lower surface is consistent with the angle of inclination of the inclined trough surface of corresponding V-type groove.
Further, when each module is combined and be in contact with one another separately, the Kong Gaowei 1mm of the rectangular through-hole that the rectangular through-hole that the U-shaped groove in the U-shaped groove in described upper left module and described lower-left module fits in and the U-shaped groove in the module of described upper right and the U-shaped groove in the module of described bottom right fit in, hole width is between 10mm to 50mm.
The beneficial effects of the utility model are: during this mould is applied to colding pressing of sheet metal strip to continue, guaranteed mould to the chucking power of sheet metal strip and welded required amount of plastic deformation, the intensity of the place's of continuing part of the metal tape after resulting continuing is equated substantially with the intensity of mother metal.
Accompanying drawing explanation
Fig. 1 is that the sheet metal strip that the utility model relates to is arranged on the schematic diagram on cold press welder by mould;
Fig. 2 is each module of mould in the utility model schematic diagram under closed contact condition;
Fig. 3 is each module of mould in the utility model schematic diagram under discrete state;
Fig. 4 is the schematic diagram of the module actuating member of mould in the utility model;
Fig. 5 is that in Fig. 1, A is in the enlarged diagram while not depressing pressure handle;
Fig. 6 is the repeated multiple times enlarged diagram of depressing after pressure handle in A place in Fig. 1;
Fig. 7 is with the metallographic analysis diagram of burr after the cross section metallograph at sheet metal strip mother metal, welding point place and welding
In figure: 1 mould, 11 halfbody one, 111 upper left module, 112 upper right modules, 113 upper surfaces, 12 halfbody two, 121 lower-left modules, 122 bottom right modules, 123 lower surfaces, 13U type groove, 14 cavitys, 15 major axis pins, 151 major axis pin-and-holes, 16 stub axle pin, 161 minor axis pin-and-holes, 17 springs, 2 sheet metal strips, 21 welding dregs, 3 cold press welders, 31 pressure handles, 32 module actuating members, 321V type groove.
The specific embodiment
For ease of further understanding technology contents of the present utility model, below in conjunction with accompanying drawing, the utility model is described in further detail.
It should be noted that; the noun of locality using when described mould is described is as " left side ", " right side "; " on ", D score all refers to the upper and lower of accompanying drawing 3, accompanying drawing 5 or accompanying drawing 6; left and right orientation is corresponding; and the vertical direction of using refers to the direction perpendicular to the drawing of accompanying drawing 3, accompanying drawing 5 or accompanying drawing 6; its objective is conveniently the architectural feature of mould is explained, so can not be as the restriction of this body structure of mould is affected to protection domain.Mentioned sheet metal strip 2 refers to brass band, but also and be not precluded within metal beyond brass band or the application on alloy strip steel rolled stock.
Paper cold welding principle: cold welding is without any need for auxiliary agent and electric energy, it is to transmit welding pressure by the mould by special-purpose, what make metal to be welded continues end under certain extruding, make wherein simple metal lattice mutually mix pressure combination, realize the catenation principle of molecular atoms structure, thereby weld the cold welding equipment of various nonferrous materials.
Cold press welder operation principle is under the effect of focus pressure load; make to need two contact surface areas that connect to expand; thereby make the oxidation protection film rupture of the original obstruction welding on face of weld, high-voltage load makes again the clean metal material close contact exposing, and produces the combination between atom.The cold welding joint of gross distortion during through welding, its combination interface all presents complicated peak valley and indenting space pattern, and its simple geometric cross section of faying face Area Ratio is large.Under normal circumstances, the cold welding joint intensity of metal of the same race is not less than mother metal; The cold welding joint intensity of dissimilar metal not the end in both sides strength of parent.A lot of metal materials can cause under traditional high-temperature soldering that joint distortion chap, foreign matter mix, resistance becomes the defects such as large electric conductivity dies down.The cold welding machine of working at normal temperatures there will not be above problem completely, only can in joint, have some because of the dregs that sclerosis is out of shape, and with flat nose pliers, peels off and just can gently.
General hardness is not high, and the metal that ductility is good is all applicable to cold press welder.Such as: aluminium, copper, nickel, platinum, gold, silver, pricker with and alloy etc.; Above two kinds of different types of metals also can weld, and welding effect and identical material welding effect are without two.Under the cold welding machine instrument that present stage is used, to the metals such as copper apply strength on be limited to 200KGF/mm2, so iron, steel with and the high metal of alloy rigidity can't complete cold welding at present.
Through experiment repeatedly, confirmed after cold welding, the intensity of blank area equates with the intensity of bus; Joint does not have obvious projection after removing out unnecessary dregs, the situation such as be out of shape, be corroded; Connection resistance, electric conductivity are compared with bus also and are not changed.
Cold welding mould is to be processed by high-quality mould steel, and by vacuum hardening heat treatment.Its hardness, in 56～60HRC left and right, has distortion little, anti abrasive performance.
In Cold welding process, plastic deformation degree is to realize the required minimum amount of plastic deformation of Cold welding, become " deformation extent ", it is the key parameter of controlling welding quality, and during extruding, metal interface must have enough plastic flow momentum could obtain high-quality joint.Plastic deformation is required to meet the oxide layer of destroying interface by sizable deflection, makes oxide layer and other impurity extrude combination interface; By plastic deformation, overcome the unevenness at interface, the soldered surface that makes to have cleaned reaches the close contact of atomic distance, forms intergranular and engages.
As shown in Figures 2 to 6, a kind of cold pressing mould of handshaking procedure of Through ground wire sheet metal strip used that is applied in, it comprises halfbody 1 and halfbody 2 12, wherein the structure of halfbody 1 and halfbody 2 12 identical and both be arranged symmetrically with.Described halfbody 1 comprises upper left module 111 and upper right module 112, halfbody 2 12 comprises lower-left module 121 and bottom right module 122, and the structure of described upper left module 111, upper right module 112, lower-left module 121 and bottom right module 122 is identical, described upper left module 111 is symmetrical arranged respectively with bottom right module 122 with upper right module 112, described lower-left module 121.
Described each module (referring to upper left module 111, upper right module 112, lower-left module 121 and bottom right module 122) is provided with a plurality of major axis pin-and-holes 151 that extend along left and right directions and a plurality of minor axis pin-and-hole 161 extending along the vertical direction; Described major axis pin-and-hole 151 is used for coordinating installs major axis pin 15, and described minor axis pin-and-hole 161 is used for coordinating installation stub axle pin 16; Described upper left module 111 has the major axis pin 15 of spring 17 to be flexibly connected with upper right module 112 by cover; Described lower-left module 121 has the major axis pin 15 of spring 17 to be flexibly connected with bottom right module 122 by cover; Described upper left module 111 has the stub axle pin 16 of spring 17 to be flexibly connected with lower-left module 121 by cover; Described upper right module 112 has the stub axle pin 16 of spring 17 to be flexibly connected with bottom right module 122 by cover; The spring 17 being sleeved in described major axis pin 15 and described stub axle pin 16 all plays rebound effect.
On the end face of each module of forward surface that is positioned at described halfbody 1 and halfbody 2 12, be equipped with the U-shaped groove 13 that left and right directions extends, and the grooved bottom surface of described U-shaped groove 13 is plane.
At the right flank at turning, bottom right of described upper left module 111, the left surface at the turning, lower-left of described upper right module 112 forms the groove of face, the left surface of the right flank at the turning, upper right of described lower-left module 121 and described bottom right module 122 upper left corner is respectively equipped with another that extend to each turning.
Each module is combined and is pressed when they are in contact with one another separately:
It is a rectangular through-hole that U-shaped groove 13 in (I) described upper left module 111 coordinates with U-shaped groove 13 in described lower-left module 121, and it forms the jaw of described mould 1; It is a rectangular through-hole that U-shaped groove 13 in described upper right module 112 also coordinates with U-shaped groove 13 in described bottom right module 122, and similarly, it also forms the jaw of described mould 1; And the central axis of two rectangular through-hole (i.e. two jaws) point-blank overlaps.
The Kong Gaowei 1mm of the rectangular through-hole that the rectangular through-hole that the U-shaped groove in the U-shaped groove in described upper left module 111 and described lower-left module 121 fits in and the U-shaped groove in described upper right module 112 and the U-shaped groove in described bottom right module 122 fit in, hole width is between 10mm to 50mm.
In welding process, the welding pressure applying is external energy unique in Cold welding process.It is delivered to position to be welded by mould 1, makes soldered position produce plastic deformation.According to the cross-sectional area of different metal band 2, impose different energy, generally weld latter stage required welding pressure than large many of the welding pressure at welding initial stage.This pressure is the required energy of sheet metal strip 2 welding, and this energy transmits by weld mold (being mould 1).Therefore, the design of the jaw of mould 1 is very large on the impact of the pressure of welding, and this is most important concerning the designer of Cold welding, and it directly affects the success or not of welding.
The groove combination that (II) described each turning (referring to the turning, bottom right of described upper left module 111, the turning, lower-left of described upper right module 112, the turning, upper right of described lower-left module 121, described bottom right module 122 upper left corner) is located becomes a penetrating cavity 14 in the vertical direction, its effect is the length (guaranteeing the moulding deflection of sheet metal strip 2) of the termination of continuing of the sheet metal strip 2 for guaranteeing to continue, and this cavity 14 is also used for discharging the welding dregs 21 that produce in Cold welding process in addition.
According to sheet metal strip 2 cross-sectional area, guarantee that sheet metal strip 2 stretches into the length in the cavity 14 of mould 1.The length that sheet metal strip 2 stretches into mould 1 cavity 14 must guarantee, makes faying face place plastic deformation amount of flow not enough if too short, causes bond strength inadequate; If oversize, will cause sheet metal strip 2 bendings, cause and weld unsuccessfully, so cavity 14 sizes of mould 1 are also very important.
The upper surface 113 of (III) described halfbody 1, the lower surface 123 of described halfbody 2 12 are the V-type face that blind end is plane.
Because due to processing technology, in the upper right corner of described upper left module 111, the upper left corner of described upper right module, the lower right corner of described lower-left module and the lower left corner of described bottom right module is respectively equipped with fillet, so the center of the median surface of the above-mentioned 113Ji lower surface, upper surface 123 of V-shaped forming has a little groove, it does not form looking and be the restriction of the V-type face of plane for blind end in described upper surface 113 and described lower surface 123 main bodys.
Described mould 1 also comprises two module actuating members 32 that structure is identical, and as shown in Figure 4, the bottom land that the medial surface of described module actuating member 32 is provided with V-type groove 321 and this V-type groove 321 is plane.
As shown in Figure 5 and Figure 6, the V-type groove of two described module actuating members 32 matches with the upper surface 113 of described halfbody 1 or the lower surface 123 of described halfbody 2 12 respectively, and it is consistent with the angle of inclination of the inclined trough surface of described V-type groove 321 to form the angle of inclination on inclined plane of described upper surface 113 or described lower surface 123.
During use, as shown in Fig. 1 and Fig. 5, Fig. 6, first module actuating member 32 is arranged on cold press welder 3, after each module being combined simultaneously, is arranged on cold press welder 3 and coordinates with the V-type groove of described module actuating member 32; Then two sheet metal strips 2 to be continued are penetrated by the notch of U-shaped groove 13 of left end and the notch of the U-shaped groove 13 of right-hand member respectively, and guarantee that the continued access end for the treatment of of described two sheet metal strips 2 is positioned at the center of described mould 1; Now, owing to being sleeved on the effect of the spring 17 in major axis pin 15 and stub axle pin 16, described each module is each other from the not contact of, each mating surface.
The pressure handle 31(that presses described cold press welder 3 downwards acts on welding pressure), welding pressure reaches each module by described module actuating member 32, the relative halfbody 2 12 being comprised of lower-left module 121 and bottom right module 122 of halfbody 1 being comprised of with upper right module 112 upper left module 111 is moved up and down, and then the sheet metal strip 2 that penetrates described U-shaped groove 13 is clamped; Meanwhile, also make respectively between upper left module 111 and upper right module 112, relative moving left and right between lower-left module 121 and bottom right module 122, and then drive respectively corresponding sheet metal strip 2 or be moved to the left (even if the joint of sheet metal strip is in opposite directions by middle mobile) to the right, bidirectional pressing makes the joint of sheet metal strip complete Cold welding by friction and Extrusion, and the end of two sheet metal strips 2 is pressed together.After removing welding pressure, be set under the effect of the spring 17 in major axis pin 15 and stub axle pin 16, described each module disengages each other.
As shown in Figure 7, wherein (a) is the metallograph of the cross section of brass band mother metal, (b) be the metallograph of the cross section of the welding point of welding procedure after processing, the place of continuing of the metal tape that by (a) and (b) can finding out takes to cold pressing after continuing that technique is resulting and continuing intensity partly equates substantially with the intensity of mother metal; (c) for being with deckle-edged metallographic analysis diagram after welding, by this figure, can find out joint except having unnecessary burr projection, the situation of not being out of shape, being corroded; .
Table one is the mechanical and physical performance table of comparisons of brass band before and after continuing:
Table one
| Sequence number | Project | Unit | Specification requirement | Brass band mother metal | Place's joint continues |
| 1 | 20 ℃ of specific insulations | Ω·m㎡/m | 0.09 | 0.07 | 0.07 |
| 2 | Tensile strength | Mpa | 260 | 380 | 390 |
| 3 | Elongation at break | % | 25 | 38 | 33 |
The resistance at the tables of data exposed joint place of table one and electric conductivity are not compared with mother metal yet and are changed, and hot strength and percentage of elongation all meet instructions for use.
Claims (2)
1. be applied in the cold pressing mould of handshaking procedure of Through ground wire sheet metal strip used, it is characterized in that:
Comprise halfbody one and halfbody two, wherein the structure of halfbody one and halfbody two identical and both be arranged symmetrically with;
Described halfbody one comprises upper left module and upper right module, halfbody two comprises lower-left module and bottom right module, and the structure of described upper left module, upper right module, lower-left module and bottom right module is identical, described upper left module and upper right module, described lower-left module and bottom right module are symmetrical arranged respectively;
Described each module is provided with a plurality of major axis pin-and-holes that extend along left and right directions and a plurality of minor axis pin-and-hole extending along the vertical direction;
Between described upper left module and upper right module, be flexibly connected by major axis pin respectively between described lower-left module and bottom right module, on the outer cylinder of major axis pin, suit plays the spring of rebound effect;
Between described upper left module and lower-left module, be flexibly connected by stub axle pin respectively between described upper right module and bottom right module, on the outer cylinder of stub axle pin, suit plays the spring of rebound effect;
On each module end face of forward surface that is positioned at described halfbody one and described halfbody two, be provided with the U-shaped groove that left and right directions extends, and the grooved bottom surface of described U-shaped groove is plane;
At the left surface of right flank, the left surface at turning, module lower-left, described upper right, the right flank at the turning, upper right of described lower-left module and the described bottom right module upper left corner at the turning, bottom right of described upper left module, be respectively equipped with another that extend to each turning and form the groove of face;
While combining and making them to be in contact with one another separately each module: it is a rectangular through-hole that the U-shaped groove in described upper left module coordinates with U-shaped groove in the module of described lower-left, it is a rectangular through-hole that U-shaped groove in the module of described upper right also coordinates with U-shaped groove in the module of described bottom right, and the central axis of two rectangular openings point-blank overlaps; The groove combination of described each corner becomes a penetrating cavity in the vertical direction; The lower surface of the upper surface of described halfbody one, described halfbody two is all the V-type face that blind end is plane;
Also comprise two module actuating members that structure is identical, the bottom land that the medial surface of described module actuating member is provided with V-type groove and this V-type groove is plane;
The V-type groove of two described module actuating members coordinates with the upper surface of described halfbody one or the lower surface of described halfbody two respectively, and the angle of inclination, inclined-plane of described upper surface and described lower surface is consistent with the angle of inclination of the inclined trough surface of corresponding V-type groove.
2. the cold pressing mould of handshaking procedure of Through ground wire sheet metal strip used that is applied according to claim 1, it is characterized in that: when each module is combined and be in contact with one another separately, the Kong Gaowei 1mm of the rectangular through-hole that the rectangular through-hole that the U-shaped groove in the U-shaped groove in described upper left module and described lower-left module fits in and the U-shaped groove in the module of described upper right and the U-shaped groove in the module of described bottom right fit in, hole width is between 10mm to 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320471296.6U CN203426616U (en) | 2013-08-02 | 2013-08-02 | Die applied to cold-pressing splicing process of metal strip used for run-through grounding line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320471296.6U CN203426616U (en) | 2013-08-02 | 2013-08-02 | Die applied to cold-pressing splicing process of metal strip used for run-through grounding line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203426616U true CN203426616U (en) | 2014-02-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320471296.6U Withdrawn - After Issue CN203426616U (en) | 2013-08-02 | 2013-08-02 | Die applied to cold-pressing splicing process of metal strip used for run-through grounding line |
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| Country | Link |
|---|---|
| CN (1) | CN203426616U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103506754A (en) * | 2013-08-02 | 2014-01-15 | 济南瑞通铁路电务有限责任公司 | Jointed technology and die applied to jointed process of metal strips used in through ground wires |
-
2013
- 2013-08-02 CN CN201320471296.6U patent/CN203426616U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103506754A (en) * | 2013-08-02 | 2014-01-15 | 济南瑞通铁路电务有限责任公司 | Jointed technology and die applied to jointed process of metal strips used in through ground wires |
| CN103506754B (en) * | 2013-08-02 | 2015-03-25 | 济南瑞通铁路电务有限责任公司 | Die applied to jointed process of metal strips used in through ground wires |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140212 Effective date of abandoning: 20150325 |
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| RGAV | Abandon patent right to avoid regrant |