CN104989628A - Compressor shell - Google Patents
Compressor shell Download PDFInfo
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- CN104989628A CN104989628A CN201510485338.5A CN201510485338A CN104989628A CN 104989628 A CN104989628 A CN 104989628A CN 201510485338 A CN201510485338 A CN 201510485338A CN 104989628 A CN104989628 A CN 104989628A
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Abstract
The invention relates to the technical field of compressor accessories, in particular to a compressor shell. The compressor shell comprises a compressor shell body which is formed by welding at least two shell subsections through resistance welding, the shell subsections are provided with welding ends, every two adjacent shell subsections are welded through the welding ends, all constituting parts of the compressor shell body are welded through resistance welding, a welding connecting portion which can perform resistance welding is additionally arranged between the welding ends of every two adjacent shell subsections of the compressor shell body, and the contact surface of at least one of the welding ends of the two adjacent shell subsections and the welding connecting portion is smaller than that of the welding ends of the two adjacent shell subsections. According to the compressor shell, the welding machining cost can be effectively saved and the welding efficiency can be improved while it is guaranteed that welding is firm.
Description
Technical field
The invention relates to compressor accessory technical field, particularly relates to compressor case.
Background technique
The shell of existing compressor case generally adopts metallic material to make, and how to be welded to form by least two-part in the axial direction.Due to compressor in the running, the vibration of axial cyclic can be there is, and the part of its most fragile will be welding part, and compressor case is fully closed, in order to ensure the rigidity of compressor case, compressor case must have good welding quality, therefore has strict demand to the intensity of welding part, otherwise during vibration of compressor the welding part of shell easily occur crackle cause leak.
The applicant has applied for that publication number is that the Chinese invention patent of CN 102699504 A discloses " a kind of open making method of compressor liquid storage device " early stage, its technological scheme comprises, and " liquid-storage container has sealing dissolved samples and is combined in welded pipe sealing dissolved samples being communicated with sealing dissolved samples inside; described sealing dissolved samples adopts ferrous material to make; described welded pipe adopts copper plated material or copper material to make, and the welding of described sealing dissolved samples self and welding between sealing dissolved samples with welded pipe are both and adopt solderless resistance welding to realize." sealing dissolved samples of this liquid-storage container comprises the cylindrical shell of a hollow; and be combined in upper end cap and the lower end cap at cylindrical shell two ends respectively; the welding ends of cylindrical shell, upper end cap and lower end cap is respectively arranged with flange; by by corresponding flange between two to connecting; and adopt solderless resistance welding to be fixed, realize cylindrical shell and the combination up and down between end cap.
Resistance welding applies pressure by electrode after workpiece combination, utilizes electric current to be carried out the method for welding by the resistance heat that surface of contact and the adjacent domain of joint produce.In above-mentioned documents, the flange that the welding ends of cylindrical shell, upper end cap and lower end cap is arranged is to better ensure the quality of welding and intensity, in case welding part generation crackle causes leaking during vibration of compressor, but by also bringing trouble to welding processing simultaneously.Two flanges be merged weld together needs to produce enough resistance heats in welding end surface, produce the electric current applied when enough the simplest methods of resistance heat are exactly and extend weld interval or improve welding, but extend weld interval and can have a strong impact on welding processing efficiency, and improve welding current and directly can increase power consumption, thus increase processing cost.
In addition, compressor can produce in the running and vibrates and be passed to compressor case, for a long time, can have influence on the welding part on compressor case, causes upper end cap, weld strength between cylindrical shell and lower end cap to reduce.
Prior art is, directly upper cover welding ends 10 and welding ends on cylindrical shell 20 is docked by resistance welding and welds to be connected upper cover 1 and cylindrical shell 2, welding ends under cylindrical shell 21 and lower cover welding ends 30 is docked by resistance welding and welds with connector drum 2 and lower cover 3.But like this, under the area of contact of upper cover welding ends 10 and welding ends 20 on cylindrical shell and cylindrical shell, welding ends 21 is comparatively large with the area of contact of lower cover welding ends 30, when making resistance welding, because the resistance of welding ends is little, makes heating slowly.
The invention, as shown in Figure 1, is provided with teat 4 at upper cover welding ends 10, and this teat 4 also can be arranged on cylindrical shell and welding ends 20 is not located on upper cover welding ends 10; Similar, under cylindrical shell, welding ends 21 is also provided with teat 4, equally, this teat 4 also can be located at and lower cover welding ends 30 not be located under cylindrical shell on welding ends 21.
During resistance welding, teat 4 on upper cover welding ends 10 and welding ends 20 linear contact lay on cylindrical shell, in like manner, teat 4 under cylindrical shell on welding ends 21 is also linear contact lay with lower cover welding ends 30, greatly reduce area of contact when welding between each constituent element, substantially increase welding kesistance when carrying out resistance welding, make teat 4 can produce enough resistance heats fast, thus be melted, achieve rapid welding, and do not need to improve input current, also need not extend weld interval, not only save processing cost, also drastically increase production and processing efficiency simultaneously.
See along compressor case body axial direction, teat 4 can be the ring-type teat along the complete setting of welding ends, also can be designed to discontinuous dotted line ring-type teat.
And the cross-sectional profiles of teat 4 can adopt triangle, also can be designed to arc, see Fig. 1, ensure that between teat 4 and welding ends be linear contact lay or point cantact.
Summary of the invention
The object of the invention is to avoid above-mentioned deficiency of the prior art and provides a kind of do not increase welding cost and effectively improve welding efficiency, guarantee the compressor case of firm welding simultaneously.
The object of the invention is achieved through the following technical solutions:
Provide compressor case, comprise compressor case body, described compressor case body is the compressor case body consisted of electric resistance welding at least Liang Ge shell branch, shell branch is provided with welding ends, welded by described welding ends between adjacent two shell branches, welding ends between each constituent element of described compressor case body passes through electric resistance welding, the welded connection that one can carry out resistance welding is set up between the welding ends of the adjacent two shell branches of described compressor case body, in the welding ends of described adjacent two shell branches, surface of contact between one of them welding ends and described welded connection is less than the surface of contact between the welding ends of described adjacent two shell branches.
Wherein, described welded connection is the metal ring of circular in cross-section, and two end faces of described metal ring are connected to the welding ends of adjacent two shell branches respectively, and form linear contact lay with described welding ends.
Wherein, described welded connection is to be arranged on one of them welding ends in the welding ends of adjacent two shell branches and towards the teat of wherein another welding ends direction projection.
Wherein, described teat be on described compressor case body axial direction in the form of a ring or the teat of dotted line ring-type, the cross-sectional profiles of described teat is triangular in shape or arc, described teat and described wherein another welding ends linear contact lay or point cantact.
Wherein, the welding ends of adjacent two shell branches is all extended with annular flange flange outward along the radial direction of described compressor case body, described welded connection be one of them welding ends be arranged in the welding ends of described adjacent two shell branches annular flange flange on towards the die mould of the wherein projection in the annular flange flange direction of another welding ends.
Wherein, described die mould be on described compressor case body axial direction in the form of a ring or the die mould of dotted line ring-type, described die mould is provided with one or more, the cross-sectional profiles of described die mould curved or pointed shape, described die mould and described wherein another welding ends linear contact lay or point cantact.
Wherein, described welded connection is be arranged on the rake on one of them welding ends in the welding ends of adjacent two shell branches, described rake and wherein another welding ends relative tilt, outside or the inside cord of described rake and described wherein another welding ends contact.
Wherein, in the adjacent two-part welding ends of described compressor case body, one of them welding ends arranges convex gear, described convex gear towards wherein another welding ends direction and described in being attached at wherein the madial wall of another welding ends extend, fall in compressor case body to block welding slag.
Wherein, described wherein another welding ends is provided with and the screens that described convex gear is put, matching form closes, during welding, described convex block card is connected to described screens.
The beneficial effect of the invention:
The resistance heat produced during resistance welding can calculate according to joule's law, joule's law mathematic(al) representation: Q=I2RT.According to joule's law mathematic(al) representation, when adopting resistance welding to carry out fusion welding to cylindrical shell, upper end cap and lower end cap, the heat that flange produces is directly proportional with the quadratic power of electric current, and the resistance with flange is directly proportional, and is directly proportional with current"on"time.During actual processing, after the material setting of compressor case body, heat required during resistance welding also determines, therefore do not improve welding input current, do not extend weld interval yet prerequisite under, want to reach required welding heat fast, the most direct method is exactly realized by the contact resistance of increase weld.Decision formula according to resistance: R=ρ l/s, wherein ρ is specific resistance, and l is the length of resistance, and s is cross-section area, and after the setting of compressor case bulk material, ρ is constant, and therefore will increase resistance is exactly the ratio that will improve l/s.
The compressor case of the invention, the compressor case body of this compressor case to be docked by resistance welding by least two-part in the vertical direction and is welded to form, by setting up the welded connection that can carry out resistance welding between the adjacent two-part welding ends of described compressor case body, make in described adjacent two-part welding ends, between the adjacent two-part welding ends that one of them welding ends and the area of contact of described welded connection are less than original compressor case body, weld area of contact.In butt welding termination process, by realizing contact weld by welded connection between adjacent two-part welding ends, to reduce welding area of contact, add the resistance between welding ends, thus can, while not improving welding input current, also not extending weld interval, realize producing required welding heat fast at welding ends, melt welding ends, under the prerequisite ensureing firm welding, can not only processing cost be saved, also ensure that manufacturing efficiency simultaneously.
Accompanying drawing explanation
Accompanying drawing is utilized to be described further innovation and creation, but the embodiment in accompanying drawing does not form any restriction to the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the following drawings.
Fig. 1 is the structural representation of the embodiment 1 of the invention.
Fig. 2 is the structural representation of the embodiment 2 of the invention.
Fig. 3 is the structural representation of the embodiment 3 of the invention.
Fig. 4 is the structural representation of the embodiment 4 of the invention.
Fig. 5 is the structural representation of the embodiment 5 of the invention.
Fig. 6 is the structural representation of the embodiment 6 of the invention.
Fig. 7 is the structural representation of the embodiment 7 of the invention.
Fig. 8 is the structural representation of the embodiment 8 of the invention.
Reference character:
1-upper cover, 10-upper cover welding ends,
2-cylindrical shell, welding ends on 20-cylindrical shell, welding ends under 21-cylindrical shell,
3-lower cover, 30-lower cover welding ends,
4-teat,
5-annular flange flange, 50-die mould, the convex gear of 51-, 52-screens,
6-metal ring,
7-rake.
Embodiment
With the following Examples the invention is further described.
embodiment 1
One of embodiment of the compressor case of the invention, as shown in Figure 1, comprise compressor case body, described compressor case body comprises the cylindrical shell 2 of a hollow and is connected to upper cover 1 and the lower cover 3 at cylindrical shell 2 two ends, and upper cover 1, cylindrical shell 2 and lower cover 3 form described compressor case body by electric resistance welding.Wherein, upper cover 1 is provided with upper cover welding ends 10, and cylindrical shell 2 to be provided with on cylindrical shell welding ends 21 under welding ends 20 and cylindrical shell, and lower cover 3 is provided with lower cover welding ends 30.
embodiment 2
The embodiment two of the compressor case of the invention, as shown in Figure 2, the main technical schemes of the present embodiment is identical with embodiment 1, in the present embodiment unaccounted feature, adopts the explanation in embodiment 1, no longer repeats at this.The difference of the present embodiment and embodiment 1 is, on cylindrical shell, under welding ends 20 and cylindrical shell, welding ends 21 is extended with annular flange flange 5 outward along the radial direction of cylindrical shell, and teat 4 is separately positioned on upper cover welding ends 10 and lower cover welding ends 30.Certainly, in adjacent two welding endss, annular flange flange 5 also can be selected to be arranged on and upper cover welding ends 10 not be located on cylindrical shell on welding ends 20; In like manner, under cylindrical shell in welding ends 21 and lower cover welding ends 30, annular flange flange 5 also can be selected to be located on lower cover welding ends 30.The compressor case of the present embodiment does not arrange dividing plate 8.
For preventing welding slag from falling in compressor case body, on cylindrical shell welding ends 20 annular flange flange 5 on a convex gear 51 is set, convex gear 51 extends protruding to the direction of upper cover welding ends 10, the madial wall that is attached at upper cover 1, to block welding ends, as shown in Figure 2.Similarly, under cylindrical shell welding ends 21 annular flange flange 5 on be provided with the convex gear 51 of same structure, during effective anti-welding ends resistance welding, welding slag falls into compressor case, convex gear 51 also plays the effect of a location simultaneously, location upper cover 1, lower cover 3 and cylindrical shell 2 rigging position.
embodiment 3
The embodiment three of the compressor case of the invention, as shown in Figure 3, the main technical schemes of the present embodiment is identical with embodiment 1, in the present embodiment unaccounted feature, adopts the explanation in embodiment 1, no longer repeats at this.The difference of the present embodiment and embodiment 1 is, on upper cover welding ends 10, cylindrical shell, under welding ends 20, cylindrical shell, welding ends 21 and lower cover welding ends 30 are all extended with annular flange flange 5 outward along the radial direction of compressor case body, wherein, the annular flange flange 5 of upper cover welding ends 10 is provided with die mould 50, this die mould 50 is specially the die mould of the direction projection of the annular flange flange 5 of welding ends 20 on cylindrical shell, in addition, this die mould 50 also can change into and be arranged in the annular flange flange 5 of welding ends 20 on cylindrical shell, and the annular flange flange 5 towards upper cover welding ends 10 is then correspondingly made in its direction into; Similarly, under cylindrical shell welding ends 21 annular flange flange 5 on be provided with identical die mould 50, this die mould 50 is then protruding towards lower cover welding ends 30.
This die mould 50 can arrange one or more, and the cross section of this die mould 50 can be designed to arc or pointed shape, as shown in Figure 3, to ensure between die mould 50 and welding ends as linear contact lay or point cantact.
Arranging die mould 50 is area of contact in order to reduce during welding, namely the s of R=ρ l/s in resistance decision formula is reduced, to stretch out annular flange flange 5 at the welding ends of each constituent element of compressor case body, and die mould 50 is arranged in annular flange flange 5, the effective length of actual welding end can be increased, namely increase the l of R=ρ l/s in resistance decision formula, finally improve the ratio of l/s, add the resistance value of welding ends, realize rapid heating.
Owing to having set up die mould 50 between welding ends, a spacing can be formed between welding ends, when welding, welding slag may fall to inside compressor case body from this break joint, for preventing welding slag from falling into compressor case body, the annular flange flange 5 of upper cover welding ends 10 arranges a convex gear 51, direction from convex gear 51 to the annular flange flange 5 of welding ends on cylindrical shell 20 and be attached at cylindrical shell 2 madial wall extend, to block described break joint, as shown in Figure 3.Similarly, under cylindrical shell welding ends 21 annular flange flange 5 on be provided with identical convex gear 51, further, the screens 52 of closing with the position of described convex gear 51, matching form can be set in the annular flange flange 5 of lower cover welding ends 30, during welding, convex gear 51 inlay card, in screens 52, facilitates the location of each constituent element, sees Fig. 3.
embodiment 4
The embodiment four of the compressor case of the invention, as shown in Figure 4, comprise compressor case body, described compressor case body comprises the cylindrical shell 2 of a hollow and is connected to upper cover 1 and the lower cover 3 at cylindrical shell 2 two ends, and upper cover 1, cylindrical shell 2 and lower cover 3 form described compressor case body by electric resistance welding.Wherein, upper cover 1 is provided with upper cover welding ends 10, and cylindrical shell 2 to be provided with on cylindrical shell welding ends 21 under welding ends 20 and cylindrical shell, and lower cover 3 is provided with lower cover welding ends 30.
Wherein, rake 7 is provided with on cylindrical shell on welding ends 20, rake 7 is specially the inclined wall of the ring-type arranged along welding ends on cylindrical shell 20, rake 7 and upper cover welding ends 10 relative tilt, described rake 7 can, to the inner inclination of upper cover 1, be now the inner side edge of upper cover welding ends 10 and the inclined-plane linear contact lay of rake 7; Rake 7 can, towards the outer inclination of upper cover 1, be also now the outer side of upper cover welding ends 10 and the inclined-plane linear contact lay of rake 7.Preferably, rake 7 is toward the inner inclination of upper cover 1.Certainly this rake 7 also can change into and being arranged on upper cover welding ends 10.Similarly, lower cover welding ends 30 is also provided with rake 7.
During resistance welding, the inclined-plane of the rake 7 on cylindrical shell on welding ends 20 welds with the inner side edge linear contact lay of upper cover welding ends 10, greatly reduce area of contact during welding, substantially increase welding kesistance when carrying out resistance welding, make rake 7 can produce enough resistance heats fast with the contact of upper cover welding ends 10, thus be melted and weld, achieve rapid welding, drastically increase production and processing efficiency.In like manner, the inner side edge linear contact lay resistance welding of rake on lower cover welding ends 30 7 and welding ends 21 under cylindrical shell.
As shown in Figure 4, also for ease of welding slag when preventing from carrying out resistance welding enters in compressor case body, on cylindrical shell, the end of the rake 7 of welding ends 20 is extended with convex gear 51 toward upper cover welding ends 10 direction, convex gear 51 is specially the annular wall that the top along rake 7 is arranged, and the outer side surface of this annular wall is attached at the madial wall of upper cover 1.In like manner, the rake 7 of lower cover welding ends 30 arranges same convex gear 51.
embodiment 5
The embodiment five of the compressor case of the invention, as shown in Figure 5, the main technical schemes of the present embodiment is identical with embodiment 4, in the present embodiment unaccounted feature, adopts the explanation in embodiment 4, no longer repeats at this.The difference of the present embodiment and embodiment 4 is, two rakes 7 to be separately positioned on cylindrical shell under welding ends 20 and cylindrical shell on welding ends 21, as shown in Figure 5, the rake 7 that cylindrical shell 2 is arranged, be the skewed projection of the ring-type arranged along the outer wall of cylindrical shell 2 in shape, these two rakes 7 coordinate with the inner side edge linear contact lay of upper cover welding ends 10 and lower cover welding ends 30 respectively.
embodiment 6
The embodiment six of the compressor case of the invention, as shown in Figure 6, the main technical schemes of the present embodiment is identical with embodiment 5, in the present embodiment unaccounted feature, adopts the explanation in embodiment 5, no longer repeats at this.The difference of the present embodiment and embodiment 5 is, two rakes 7 are separately positioned on cylindrical shell on welding ends 20 and lower cover welding ends 30, and as shown in Figure 6, these two rakes 7 coordinate with the inner side edge linear contact lay of welding ends 21 under upper cover welding ends 10 and cylindrical shell respectively.
embodiment 7
The embodiment seven of the compressor case of the invention, as shown in Figure 7, comprise compressor case body, described compressor case body comprises upper cover 1 and lower cover 3, upper cover 1 is provided with upper cover welding ends 10, upper cover 1 and lower cover 3 form described compressor case body by electric resistance welding, and lower cover 3 is provided with lower cover welding ends 30, and upper cover welding ends 10 and lower cover welding ends 30 are docked by resistance welding and weld to be connected upper cover 1 and lower cover 3.
As shown in Figure 7, a welded connection is provided with between upper cover welding ends 10 and lower cover welding ends 30, described welded connection can adopt resistance welding to connect upper cover welding ends 10 and lower cover welding ends 30, particularly, described welded connection is metal ring 6, the circular in cross-section of metal ring 6, preferably, the material composition of this metal ring 6 comprises Fe, Cu and Ag.More preferably, the mass percentage content of Fe, Cu and Ag is that Fe accounts for 59% ~ 60%, Cu and accounts for 39% ~ 40%, Ag and account for 0% ~ 2%.
embodiment 8
The embodiment eight of the compressor case of the invention, as shown in Figure 8, the main technical schemes of the present embodiment is identical with embodiment 7, in the present embodiment unaccounted feature, adopts the explanation in embodiment 7, no longer repeats at this.The difference of the present embodiment and embodiment 7 is, upper cover welding ends 10 and lower cover welding ends 30 are extended with annular flange flange 5 outward along the radial direction of compressor case body, and metal ring 6 is arranged between the annular flange flange 5 of upper cover welding ends 10 and lower cover welding ends 30.
Finally should be noted that; above embodiment is only in order to illustrate the technological scheme of the invention; but not the restriction to the invention protection domain; although done to explain to the invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to the technological scheme of the invention or equivalent replacement, and not depart from essence and the scope of the invention technological scheme.
Claims (9)
1. compressor case, comprise compressor case body, described compressor case body is the compressor case body consisted of electric resistance welding at least Liang Ge shell branch, shell branch is provided with welding ends, welded by described welding ends between adjacent two shell branches, welding ends between each constituent element of described compressor case body passes through electric resistance welding, it is characterized in that: between the welding ends of the adjacent two shell branches of described compressor case body, set up the welded connection that can carry out resistance welding, in the welding ends of described adjacent two shell branches, surface of contact between one of them welding ends and described welded connection is less than the surface of contact between the welding ends of described adjacent two shell branches.
2. compressor case according to claim 1, it is characterized in that: described welded connection is the metal ring of circular in cross-section, two end faces of described metal ring are connected to the welding ends of adjacent two shell branches respectively, and form linear contact lay with described welding ends.
3. compressor case according to claim 1, is characterized in that: described welded connection is to be arranged on one of them welding ends in the welding ends of adjacent two shell branches and towards the teat of wherein another welding ends direction projection.
4. compressor case according to claim 3, it is characterized in that: described teat be on described compressor case body axial direction in the form of a ring or the teat of dotted line ring-type, the cross-sectional profiles of described teat is triangular in shape or arc, described teat and described wherein another welding ends linear contact lay or point cantact.
5. compressor case according to claim 1, it is characterized in that: the welding ends of adjacent two shell branches is all extended with annular flange flange outward along the radial direction of described compressor case body, described welded connection be one of them welding ends be arranged in the welding ends of described adjacent two shell branches annular flange flange on towards the die mould of the wherein projection in the annular flange flange direction of another welding ends.
6. compressor case according to claim 5, it is characterized in that: described die mould be on described compressor case body axial direction in the form of a ring or the die mould of dotted line ring-type, described die mould is provided with one or more, the cross-sectional profiles of described die mould curved or pointed shape, described die mould and described wherein another welding ends linear contact lay or point cantact.
7. compressor case according to claim 1, it is characterized in that: described welded connection is be arranged on the rake on one of them welding ends in the welding ends of adjacent two shell branches, described rake and wherein another welding ends relative tilt, outside or the inside cord of described rake and described wherein another welding ends contact.
8. compressor case according to claim 1, it is characterized in that: in the adjacent two-part welding ends of described compressor case body, one of them welding ends arranges convex gear, described convex gear towards wherein another welding ends direction and described in being attached at wherein the madial wall of another welding ends extend, fall in compressor case body to block welding slag.
9. compressor case according to claim 8, is characterized in that: described wherein another welding ends is provided with and the screens that described convex gear is put, matching form closes, and during welding, described convex block card is connected to described screens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510485338.5A CN104989628A (en) | 2015-08-10 | 2015-08-10 | Compressor shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510485338.5A CN104989628A (en) | 2015-08-10 | 2015-08-10 | Compressor shell |
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| CN104989628A true CN104989628A (en) | 2015-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510485338.5A Pending CN104989628A (en) | 2015-08-10 | 2015-08-10 | Compressor shell |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110405417A (en) * | 2019-07-16 | 2019-11-05 | 东莞市金瑞五金股份有限公司 | One kind being suitable for the molding cartridge cap manufacturing method of electric resistance welding |
| CN110899948A (en) * | 2019-12-13 | 2020-03-24 | 广州亨龙智能装备股份有限公司 | Efficient and environment-friendly compressor shell circumferential seam resistance projection welding process |
| CN114535766A (en) * | 2020-11-25 | 2022-05-27 | 通用汽车环球科技运作有限责任公司 | Capacitive discharge welding of dissimilar metals |
| CN115325328A (en) * | 2022-08-11 | 2022-11-11 | 广州亨龙智能装备股份有限公司 | Welded part and resistance welding process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114535766A (en) * | 2020-11-25 | 2022-05-27 | 通用汽车环球科技运作有限责任公司 | Capacitive discharge welding of dissimilar metals |
| CN114535766B (en) * | 2020-11-25 | 2023-09-26 | 通用汽车环球科技运作有限责任公司 | Capacitive discharge welding of dissimilar metals |
| CN115325328A (en) * | 2022-08-11 | 2022-11-11 | 广州亨龙智能装备股份有限公司 | Welded part and resistance welding process thereof |
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