CN105834700A - Machining process for resistance spot-welding electrode cap of automobile - Google Patents
Machining process for resistance spot-welding electrode cap of automobile Download PDFInfo
- Publication number
- CN105834700A CN105834700A CN201610404871.9A CN201610404871A CN105834700A CN 105834700 A CN105834700 A CN 105834700A CN 201610404871 A CN201610404871 A CN 201610404871A CN 105834700 A CN105834700 A CN 105834700A
- Authority
- CN
- China
- Prior art keywords
- electrode cap
- spot welding
- cold seal
- resistance spot
- processing technique
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/30—Features relating to electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Resistance Welding (AREA)
Abstract
The invention discloses a machining process for resistance spot-welding electrode cap of an automobile, belonging to the field of welding electrodes. Through the interaction of thermal treatment and cryogenic treatment, the performance of the electrode cap is improved, and the service life is effectively prolonged; the economic and effective qualified 39D 1978/1(58D8246/1) electrode cap is obtained through precisely regulating the proper temperature and treatment time during cryogenic treatment, so that the energy consumption is reduced, and the electrode cap is energy-saving and environment-friendly; and after being machined, the electrode cap is excellent in performance, long in service life and high in manufacturing efficiency.
Description
Technical field
The present invention relates to the processing technique of a kind of automobile lifetime of resistance spot welding electrode cap.
Background technology
Electrode cap is mainly used in metal solder, the soldering technique related to due to automobile industry is more, thus automobile industry is very big to the demand of electrode cap, and ordinary electrode cap is the shortest for service life, and during welding, easily produce the phenomenon generations such as splashing, thus after molding, carry out subzero treatment, and high compactness, change alloying elements distribution, improve conduction, the capacity of heat transmission, reduce and adhere to tendency, the crystal grain of refinement electrode material, improves resistance to compression and bursts deformability.
nullAs the Chinese patent of Application No. 02100433.1 discloses the cryogenic treating process for galvanized steel sheet resistance spot welding electrode，Common electrode is carried out simple subzero treatment by it，Thus simply eliminate the austenite of electrode surface，Unstable factor due to internal austenite，Cooling effect reduces along with the increase of the degree of depth，Thus substantially can be more than more than 4 hours in order to reach the preferable subzero treatment effect time，And effect promoting is inconspicuous，And only improve the intensity of its surface relatively small thickness，A certain degree of improve service life，Splash when decreasing welding，But owing to during welding, electrode cap easily produces collision with welding product，Thus electrode cap surface can be scratched，Thus electrode cap inside easily produces serious splash phenomena and viscous electrode phenomenon for treated position，Thus people need to change at once，And can promote through the electrode price of subzero treatment，Thus need the use of extreme care service life to improve to use，Thus it has been reduced working (machining) efficiency.
Summary of the invention
It is an object of the invention to provide the processing technique of a kind of automobile lifetime of resistance spot welding electrode cap, it has raising electricity level cap surface intensity, reduces overall austenite content, reduces the advantage splashed, improve the life-span.
The above-mentioned technical purpose of the present invention has the technical scheme that
The processing technique of a kind of automobile lifetime of resistance spot welding electrode cap, is characterized in that: comprise the steps:
Step one: Feedstock treating: chromium-zirconium-copper rod passes through solution treated；
Step 2: blanking: chromium-zirconium-copper rod is cut off segmentation to be processed；
Step 3: first shaping: chromium-zirconium-copper rod end face is carried out polishing formation installed surface, and another end face is worn into out protruding work portion, then make a polar cap outer circumferential sides face carry out extruding shrinking；
Step 4: cold extrusion: squeeze out taper hole on installed surface by extruder；
Step 5: hardening heat processes；
Step 6: reshaping: entered by taper hole and position on lathe, carry out partial trim；
Step 7: grooving: outer circumferential sides facing goes out annular groove in the middle part of electrode cap；
Step 8: polishing: outer surface carries out grinding process；
Step 9: subzero treatment: electrode cap is put into deep freeze refrigeration plant, is set as deep freeze refrigeration plant temperature under-150 ~-170 degree environment, and makes electrode cap take out after preserving 1.5 ~ 2 hours.
nullBy using technique scheme，After chromium-zirconium-copper rod first passes through solution treated，The austenite making inside carries out stabilizing treatment，And chromium-zirconium-copper rod is simply cut polishing define the basic configuration of electrode cap，Carry out heat treatment again，The protective layer making outer surface form hardening improves service life，And due to the setting of taper hole Yu annular groove，So that each outer surface in work portion reduces to the range difference at center when subzero treatment，So that work portion temperature spread of the temperature of center and outer surface when subzero treatment reduces，Thus improve the effect by subzero treatment，The degree of depth making subzero treatment is more，And the austenite of inside is stable austenite，Can be realized effectively eliminating by cold service，Thus be greatly improved by subzero treatment thickness at electrode cap，Due to the raising of electrode cap effective thickness during welding，Thus improve the service life of welding、Reduce and splash，Avoid viscous electrode，And also it is not easy damaged to the position not affected by subzero treatment after being collided when welding，It is greatly improved working life.
Further, described deep freeze refrigeration plant is exceeding cold seal container, and exceeding cold seal stored in containers has liquid nitrogen, and in exceeding cold seal container, temperature is set as that-150 spend, and makes electrode cap take out after preserving 1.5 hours.
By using technique scheme, electrode cap is directly placed in the sealing container having liquid nitrogen, by the refrigeration of liquid nitrogen, directly electrode cap is put into and carry out subzero treatment, thus cooling device the most simply reduces cost, and-150 easy control of temperature, liquid nitrogen can easily reach, and effectively reduces equipment cost, and the process time kept 1.5 hours just can reach good performance, thus decrease the consumption of liquid nitrogen, reach energy-conserving and environment-protective, reduce the effect of cost.
Further, described deep freeze refrigeration plant is exceeding cold seal container, and exceeding cold seal stored in containers has liquid nitrogen, and in exceeding cold seal container, temperature is set as that-150 spend, and makes electrode cap take out after preserving 2 hours.
By using technique scheme, electrode cap is directly placed in the sealing container having liquid nitrogen, by the refrigeration of liquid nitrogen, directly electrode cap is put into and carry out subzero treatment, thus cooling device the most simply reduces cost, and-150 easy control of temperature, liquid nitrogen can easily reach, and effectively reduces equipment cost, and keeps the process time of 2 hours, notable to 2 hours premise ascending effects, it is ensured that electrode cap has good performance.
Further, described deep freeze refrigeration plant is exceeding cold seal container, is provided with liquid nitrogen vaporization jet pipe in exceeding cold seal container, and in exceeding cold seal container, temperature is set as that-170 spend, and makes electrode cap take out after preserving 1.5 hours.
By using technique scheme, electrode cap is directly placed into and has in sealing container, by the refrigeration of the liquid nitrogen of vaporization, improve the refrigeration of liquid nitrogen, temperature is made to reach-170 degree, thus significantly promote deep cooling effect, make the life-span be obviously improved, directly electrode cap is put into and carry out subzero treatment, the process time kept 1.5 hours just can reach good performance, thus decrease the consumption of liquid nitrogen, reach energy-conserving and environment-protective, reduce the effect of cost.
Further, described deep freeze refrigeration plant is exceeding cold seal container, is provided with liquid nitrogen vaporization jet pipe in exceeding cold seal container, and in exceeding cold seal container, temperature is set as that-170 spend, and makes electrode cap take out after preserving 2 hours.
By using technique scheme, electrode cap is directly placed into and has in sealing container, by the refrigeration of the liquid nitrogen of vaporization, improve the refrigeration of liquid nitrogen, make temperature reach-170 degree, thus significantly promote deep cooling effect, make the life-span be obviously improved, directly electrode cap is put into and carry out subzero treatment, and keep the process time of 2 hours, notable to 2 hours premise ascending effects, it is ensured that electrode cap has good performance.
Further, described taper hole passes through secondary extrusion molding.
By using technique scheme, during extruding taper hole, after first squeezing out more than half degree of depth, making extruder exit makes internal structure realize buffering adaptations, re-start second time extruding again, thus form complete taper hole, it is achieved the precision that taper hole is extruded.
Further, described installed surface carries out inside and outside chamfering.
By using technique scheme, it is to avoid during installation, welding equipment is scratched by the angle of installed surface, improve the service life of welding equipment, and the diameter of relative taper hole oral area is expanded by a small margin, so that installing enhanced convenience.
Further, described hardening heat is processed as Ageing Treatment, and temperature is 450-500 degree, and the time is 1.5-3 hour.
By using technique scheme, complete rear electrode cap surface hardness by the electrode cap of Ageing Treatment and improve, make most of austenite on surface be changed into martensite, thus effectively improve anti-wear ability, thus improve service life.
Further, described projection is circular arc.
By using technique scheme, the outer surface everywhere of circular arc is identical to the position in the center of circle, thus the process thickness carrying out outer surface when heat treatment or subzero treatment can be the most uniform.
Further, a diameter of 16mm chosen by middle chromium-zirconium-copper rod of selecting materials, and in blanking, chromium-zirconium-copper rod uniform cut becomes 23mm, squeezes out a length of 10mm of taper hole, a length of 22mm of holding electrode cap after polishing.
By using technique scheme, choose diameter close with actual size, reduce post-production cost, a polar cap outer circumferential sides face is made to carry out extruding shrinking to actually required size again, carry out multistage during blanking to cut simultaneously, improve work efficiency, and for the later stage polish length in reserve, it is to avoid produce electrode cap process after too short.
In sum, the method have the advantages that
1. improve the performance of electrode cap by heat treatment with interacting of subzero treatment, be effectively improved service life；
2. accurately regulate proper temperature and process time when subzero treatment, obtain cost-effective qualified products, thus reduce energy consumption, energy-conserving and environment-protective；
3. excellent performance after electrode cap completes, service life is long, and the manufacture efficiency of electrode cap is high.
Accompanying drawing explanation
Fig. 1 is the general line chart of chromium-zirconium-copper X-ray diffraction before subzero treatment；
Fig. 2 is the general line chart of chromium-zirconium-copper X-ray diffraction after subzero treatment；
Fig. 3 is the process step of the invention figure；
Fig. 4 is prior art subzero treatment electrode cap life curve figure；
Fig. 5 is the electrode cap life curve figure of the present invention；
Fig. 6 is the structure chart of the electrode cap of the present invention.
In figure, 1, chromium-zirconium-copper rod；2, installed surface；3, work portion；4, taper hole；5, annular groove.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Embodiment 1: the processing technique of a kind of automobile lifetime of resistance spot welding electrode cap, comprises the steps:
Step one: Feedstock treating: chromium-zirconium-copper rod 1 passes through solution treated；
Step 2: blanking: chromium-zirconium-copper rod 1 is cut off segmentation to be processed；
Step 3: first shaping: chromium-zirconium-copper rod 1 end face is carried out polishing formation installed surface 2, and another end face is worn into out the work portion 3 of arc-shaped convex, then make a polar cap outer circumferential sides face carry out extruding shrinking；
Step 4: cold extrusion: carry out secondary extrusion on installed surface 2 by extruder and mold taper hole 4, and carry out inside and outside chamfering at installed surface 2；
Step 5: hardening heat processes；Ageing Treatment, temperature is 450-500 degree, and the time is 1.5-3 hour；
Step 6: reshaping: entered by taper hole 4 and position on lathe, carry out partial trim；
Step 7: grooving: outer circumferential sides facing goes out annular groove 5 in the middle part of electrode cap；
Step 8: polishing: outer surface carries out grinding process；
Step 9: subzero treatment: electrode cap is put into storage the exceeding cold seal container of liquid nitrogen, deep freeze refrigeration plant temperature is set as under-150 environment, and cooling rate arranges 6 DEG C/s, makes electrode cap take out after preserving 1.5 hours.
Choose the chromium-zirconium-copper rod 1 of diameter and demand similar diameters; after chromium-zirconium-copper rod 1 first passes through solution treated; the austenite having intercrystalline corrosion to be inclined to making inside carries out stabilizing treatment; the austenite making inside all tends towards stability; improve toughness, plasticity and resistance to corrosion; the austenite avoiding intercrystalline corrosion to be inclined to produces impact to subzero treatment; and chromium-zirconium-copper rod 1 is simply cut polishing define end bosses and be formed as the electrode cap of circular arc; carrying out heat treatment again, the protective layer making outer surface form hardening improves service life.
During extruding taper hole 4, first after squeezing out more than half degree of depth, making extruder exit makes internal structure realize buffering adaptations, re-start second time extruding again, thus form complete taper hole 4, thus avoid one-shot forming to cause inside to be extruded position and produce stress and pile up, thus cause disposably extruding by counteracting force excessive and be unable to reach standard.
nullAs shown in Figure 6，Setting due to taper hole 4 with annular groove 5，So that each outer surface in work portion 3 reduces to the range difference at center when subzero treatment，So that work portion 3 temperature spread of the temperature of center and outer surface when subzero treatment reduces，Thus improve the effect by subzero treatment，The degree of depth making subzero treatment is more，And the austenite of inside is stable austenite，Can be realized effectively eliminating by cold service，Thus be greatly improved by subzero treatment thickness at electrode cap，Due to the raising of electrode cap effective thickness during welding，Thus improve the service life of welding、Reduce and splash，Avoid viscous electrode，And also it is not easy damaged to the position not affected by subzero treatment after being collided when welding，It is greatly improved working life，And after outer surface is destroyed，Structure due to inside more temperature，Thus the splashing that produces is the least with adhesion phenomenon，Thus time point weldering effective performance carries out of short duration maintenance.
Pass through X-ray diffraction method, by measuring the program of Broadening of diffraction lines, measure the change of grain size size, as shown in Figure 1, 2, it is measured the electrode cap before not carrying out subzero treatment and the electrode cap after subzero treatment, after deep cooling, crystal grain substantially refines, and space structure is more tight, and strength enhancing is obvious.
nullIt is analyzed by practical data again，Such as Fig. 4、5，The life of product correspondence of subzero treatment does not carry out the life of product of subzero treatment have been had and has been obviously improved，The product that prior art obtains under-150 DEG C of * 2h PROCESS FOR TREATMENT carries out spot welding life experimental data again carry out spot welding life experimental data with the step of the present invention product under-150 DEG C of * 1.5h PROCESS FOR TREATMENT and contrast，Can show that prior art spot welding effect after getting 1200 ready is substantially reduced，And the present invention gets ready and slightly declines after 1400，Still keeping nugget size before 1800 is 3.5mm，And the size pair of nugget size is extremely important with the firmness welded after automobile spot welding，General vehicle basic demand is maintained at more than 3mm at nugget size，Thus prior art effectively gets 1400 ready，And the present invention effectively to get ready be 1800，Thus effectively raise service life，And when vehicle welds，The spot welding quantity of each car is substantially 3000 solder joints，Thus in large-scale vehicle manufactures，The lifting processing consumptive material for this high consumption has this very important economic worth，Decrease the waste of consumptive material，Energy-conserving and environment-protective.
And number of effective points just can reach 1800 points after the subzero treatment time only 1.5h of the present invention, and number of effective points can only achieve 1400 points after prior art subzero treatment 2h, thus it is effectively reduced the production time, working (machining) efficiency is provided, and then decrease the waste of liquid nitrogen, thus meet the requirement of energy-conserving and environment-protective.
Embodiment 2: the processing technique of a kind of automobile lifetime of resistance spot welding electrode cap, comprises the steps:
Step one: Feedstock treating: chromium-zirconium-copper rod 1 passes through solution treated；
Step 2: blanking: chromium-zirconium-copper rod 1 is cut off segmentation to be processed；
Step 3: first shaping: chromium-zirconium-copper rod 1 end face is carried out polishing formation installed surface 2, and another end face is worn into out the work portion 3 of arc-shaped convex, then make a polar cap outer circumferential sides face carry out extruding shrinking；
Step 4: cold extrusion: carry out secondary extrusion on installed surface 2 by extruder and mold taper hole 4, and carry out inside and outside chamfering at installed surface 2；
Step 5: hardening heat processes；Ageing Treatment, temperature is 450-500 degree, and the time is 1.5-3 hour；
Step 6: reshaping: entered by taper hole 4 and position on lathe, carry out partial trim；
Step 7: grooving: outer circumferential sides facing goes out annular groove 5 in the middle part of electrode cap；
Step 8: polishing: outer surface carries out grinding process；
Step 9: subzero treatment: electrode cap is put into storage the exceeding cold seal container of liquid nitrogen, deep freeze refrigeration plant temperature is set as under-150 environment, and cooling rate arranges 6 DEG C/s, makes electrode cap take out after preserving 2 hours.
Choose the chromium-zirconium-copper rod 1 of diameter and demand similar diameters; after chromium-zirconium-copper rod 1 first passes through solution treated; the austenite having intercrystalline corrosion to be inclined to making inside carries out stabilizing treatment; the austenite making inside all tends towards stability; improve toughness, plasticity and resistance to corrosion; the austenite avoiding intercrystalline corrosion to be inclined to produces impact to subzero treatment; and chromium-zirconium-copper rod 1 is simply cut polishing define end bosses and be formed as the electrode cap of circular arc; carrying out heat treatment again, the protective layer making outer surface form hardening improves service life.
During extruding taper hole 4, first after squeezing out more than half degree of depth, making extruder exit makes internal structure realize buffering adaptations, re-start second time extruding again, thus form complete taper hole 4, thus avoid one-shot forming to cause inside to be extruded position and produce stress and pile up, thus cause disposably extruding by counteracting force excessive and be unable to reach standard.
nullAs shown in Figure 6，Setting due to taper hole 4 with annular groove 5，So that each outer surface in work portion 3 reduces to the range difference at center when subzero treatment，So that work portion 3 temperature spread of the temperature of center and outer surface when subzero treatment reduces，Thus improve the effect by subzero treatment，The degree of depth making subzero treatment is more，And the austenite of inside is stable austenite，Can be realized effectively eliminating by cold service，Thus be greatly improved by subzero treatment thickness at electrode cap，Due to the raising of electrode cap effective thickness during welding，Thus improve the service life of welding、Reduce and splash，Avoid viscous electrode，And also it is not easy damaged to the position not affected by subzero treatment after being collided when welding，It is greatly improved working life，And after outer surface is destroyed，Structure due to inside more temperature，Thus the splashing that produces is the least with adhesion phenomenon，Thus time point weldering effective performance carries out of short duration maintenance.
Pass through X-ray diffraction method, by measuring the program of Broadening of diffraction lines, measure the change of grain size size, as shown in Figure 1, 2, it is measured the electrode cap before not carrying out subzero treatment and the electrode cap after subzero treatment, after deep cooling, crystal grain substantially refines, and space structure is more tight, and strength enhancing is obvious.
nullIt is analyzed by practical data again，Such as Fig. 4、5，The life of product correspondence of subzero treatment does not carry out the life of product of subzero treatment have been had and has been obviously improved，The product that prior art obtains under-150 DEG C of * 4h PROCESS FOR TREATMENT carries out spot welding life experimental data again carry out spot welding life experimental data with the step of the present invention product under-150 DEG C of * 2h PROCESS FOR TREATMENT and contrast，Can show that prior art spot welding effect after getting 1300 ready is substantially reduced，And the present invention gets ready and slightly declines after 1500，Still keeping nugget size before 2000 is 3.5mm，And the size pair of nugget size is extremely important with the firmness welded after automobile spot welding，General vehicle basic demand is maintained at more than 3mm at nugget size，Thus prior art effectively gets 1500 ready，And the present invention effectively to get ready be 2000，Thus effectively raise service life，And when vehicle welds，The spot welding quantity of each car is substantially 3000 solder joints，Thus in large-scale vehicle manufactures，The lifting processing consumptive material for this high consumption has this very important economic worth，Decrease the waste of consumptive material，Energy-conserving and environment-protective.
And number of effective points just can reach 2000 points after the subzero treatment time only 2h of the present invention, and number of effective points can only achieve 1500 points after prior art subzero treatment 4h, thus it is effectively reduced the production time, working (machining) efficiency is provided, and then decrease the waste of liquid nitrogen, thus meet the requirement of energy-conserving and environment-protective, thus show that prior art adds the poor effect in lifting life-span time increasing 2h-150 DEG C of situations, and the present invention processes 2h contrast in the case of-150 DEG C and processes 1.5h pair and had good lifting service life.
Embodiment 3: the processing technique of a kind of automobile lifetime of resistance spot welding electrode cap, comprises the steps:
Step one: Feedstock treating: chromium-zirconium-copper rod 1 passes through solution treated；
Step 2: blanking: chromium-zirconium-copper rod 1 is cut off segmentation to be processed；
Step 3: first shaping: wherein will carry out polishing formation installed surface 2 by end face, and another end face is worn into out the work portion 3 of arc-shaped convex, then make a polar cap outer circumferential sides face carry out extruding shrinking；
Step 4: cold extrusion: carry out secondary extrusion on installed surface 2 by extruder and mold taper hole 4, and carry out inside and outside chamfering at installed surface 2；
Step 5: hardening heat processes；Ageing Treatment, temperature is 450-500 degree, and the time is 1.5-3 hour；
Step 6: reshaping: entered by taper hole 4 and position on lathe, carry out partial trim；
Step 7: grooving: outer circumferential sides facing goes out annular groove 5 in the middle part of electrode cap；
Step 8: polishing: outer surface carries out grinding process；
Step 9: subzero treatment: electrode cap is put into storage the exceeding cold seal container of liquid nitrogen, deep freeze refrigeration plant temperature is set as under-170 environment, and cooling rate arranges 6 DEG C/s, makes electrode cap take out after preserving 1.5 hours.
Choose the chromium-zirconium-copper rod 1 of diameter and demand similar diameters; after chromium-zirconium-copper rod 1 first passes through solution treated; the austenite having intercrystalline corrosion to be inclined to making inside carries out stabilizing treatment; the austenite making inside all tends towards stability; improve toughness, plasticity and resistance to corrosion; the austenite avoiding intercrystalline corrosion to be inclined to produces impact to subzero treatment; and chromium-zirconium-copper rod 1 is simply cut polishing define end bosses and be formed as the electrode cap of circular arc; carrying out heat treatment again, the protective layer making outer surface form hardening improves service life.
During extruding taper hole 4, first after squeezing out more than half degree of depth, making extruder exit makes internal structure realize buffering adaptations, re-start second time extruding again, thus form complete taper hole 4, thus avoid one-shot forming to cause inside to be extruded position and produce stress and pile up, thus cause disposably extruding by counteracting force excessive and be unable to reach standard.
nullAs shown in Figure 6，Setting due to taper hole 4 with annular groove 5，So that each outer surface in work portion 3 reduces to the range difference at center when subzero treatment，So that work portion 3 temperature spread of the temperature of center and outer surface when subzero treatment reduces，Thus improve the effect by subzero treatment，The degree of depth making subzero treatment is more，And the austenite of inside is stable austenite，Can be realized effectively eliminating by cold service，Thus be greatly improved by subzero treatment thickness at electrode cap，Due to the raising of electrode cap effective thickness during welding，Thus improve the service life of welding、Reduce and splash，Avoid viscous electrode，And also it is not easy damaged to the position not affected by subzero treatment after being collided when welding，It is greatly improved working life，And after outer surface is destroyed，Structure due to inside more temperature，Thus the splashing that produces is the least with adhesion phenomenon，Thus time point weldering effective performance carries out of short duration maintenance.
Pass through X-ray diffraction method, by measuring the program of Broadening of diffraction lines, measure the change of grain size size, as shown in Figure 1, 2, it is measured the electrode cap before not carrying out subzero treatment and the electrode cap after subzero treatment, after deep cooling, crystal grain substantially refines, and space structure is more tight, and strength enhancing is obvious.
nullIt is analyzed by practical data again，Such as Fig. 4、5，The life of product correspondence of subzero treatment does not carry out the life of product of subzero treatment have been had and has been obviously improved，The product that prior art obtains under-170 DEG C of * 2h PROCESS FOR TREATMENT carries out spot welding life experimental data again carry out spot welding life experimental data with the step of the present invention product under-170 DEG C of * 1.5h PROCESS FOR TREATMENT and contrast，Can show that prior art spot welding effect after getting 1800 ready is substantially reduced，And the present invention gets ready and slightly declines after 2100，Still keeping nugget size before 2400 is 3.5mm，And the size pair of nugget size is extremely important with the firmness welded after automobile spot welding，General vehicle basic demand is maintained at more than 3mm at nugget size，Thus prior art effectively gets 2000 ready，And the present invention effectively to get ready be 2400，Thus effectively raise service life，And when vehicle welds，The spot welding quantity of each car is substantially 3000 solder joints，Thus in large-scale vehicle manufactures，The lifting processing consumptive material for this high consumption has this very important economic worth，Decrease the waste of consumptive material，Energy-conserving and environment-protective.
And number of effective points just can reach 2400 points after the subzero treatment time only 1.5h of the present invention, and number of effective points can only achieve 2000 points after prior art subzero treatment 2h, thus it is effectively reduced the production time, working (machining) efficiency is provided, and then decrease the waste of liquid nitrogen, thus meet the requirement of energy-conserving and environment-protective.
Embodiment 4: the processing technique of a kind of automobile lifetime of resistance spot welding electrode cap, comprises the steps:
Step one: Feedstock treating: chromium-zirconium-copper rod 1 passes through solution treated；
Step 2: blanking: chromium-zirconium-copper rod 1 is cut off segmentation to be processed；
Step 3: first shaping: chromium-zirconium-copper rod 1 end face is carried out polishing formation installed surface 2, and another end face is worn into out the work portion 3 of arc-shaped convex, then make a polar cap outer circumferential sides face carry out extruding shrinking；
Step 4: cold extrusion: carry out secondary extrusion on installed surface 2 by extruder and mold taper hole 4, and carry out inside and outside chamfering at installed surface 2；
Step 5: hardening heat processes；Ageing Treatment, temperature is 450-500 degree, and the time is 1.5-3 hour；
Step 6: reshaping: entered by taper hole 4 and position on lathe, carry out partial trim；
Step 7: grooving: outer circumferential sides facing goes out annular groove 5 in the middle part of electrode cap；
Step 8: polishing: outer surface carries out grinding process；
Step 9: subzero treatment: electrode cap is put into storage the exceeding cold seal container of liquid nitrogen, deep freeze refrigeration plant temperature is set as under-170 environment, and cooling rate arranges 6 DEG C/s, makes electrode cap take out after preserving 2 hours.
Choose the chromium-zirconium-copper rod 1 of diameter and demand similar diameters; after chromium-zirconium-copper rod 1 first passes through solution treated; the austenite having intercrystalline corrosion to be inclined to making inside carries out stabilizing treatment; the austenite making inside all tends towards stability; improve toughness, plasticity and resistance to corrosion; the austenite avoiding intercrystalline corrosion to be inclined to produces impact to subzero treatment; and chromium-zirconium-copper rod 1 is simply cut polishing define end bosses and be formed as the electrode cap of circular arc; carrying out heat treatment again, the protective layer making outer surface form hardening improves service life.
During extruding taper hole 4, first after squeezing out more than half degree of depth, making extruder exit makes internal structure realize buffering adaptations, re-start second time extruding again, thus form complete taper hole 4, thus avoid one-shot forming to cause inside to be extruded position and produce stress and pile up, thus cause disposably extruding by counteracting force excessive and be unable to reach standard.
nullAs shown in Figure 6，Setting due to taper hole 4 with annular groove 5，So that each outer surface in work portion 3 reduces to the range difference at center when subzero treatment，So that work portion 3 temperature spread of the temperature of center and outer surface when subzero treatment reduces，Thus improve the effect by subzero treatment，The degree of depth making subzero treatment is more，And the austenite of inside is stable austenite，Can be realized effectively eliminating by cold service，Thus be greatly improved by subzero treatment thickness at electrode cap，Due to the raising of electrode cap effective thickness during welding，Thus improve the service life of welding、Reduce and splash，Avoid viscous electrode，And also it is not easy damaged to the position not affected by subzero treatment after being collided when welding，It is greatly improved working life，And after outer surface is destroyed，Structure due to inside more temperature，Thus the splashing that produces is the least with adhesion phenomenon，Thus time point weldering effective performance carries out of short duration maintenance.
Pass through X-ray diffraction method, by measuring the program of Broadening of diffraction lines, measure the change of grain size size, as shown in Figure 1, 2, it is measured the electrode cap before not carrying out subzero treatment and the electrode cap after subzero treatment, after deep cooling, crystal grain substantially refines, and space structure is more tight, and strength enhancing is obvious.
nullIt is analyzed by practical data again，Such as Fig. 4、5，The life of product correspondence of subzero treatment does not carry out the life of product of subzero treatment have been had and has been obviously improved，The product that prior art obtains under-150 DEG C of * 4h PROCESS FOR TREATMENT carries out spot welding life experimental data again carry out spot welding life experimental data with the step of the present invention product under-150 DEG C of * 2h PROCESS FOR TREATMENT and contrast，Can show that prior art spot welding effect after getting 1900 ready is substantially reduced，And the present invention gets ready and slightly declines after 2300，Still keeping nugget size before 2600 is 3.5mm，And the size pair of nugget size is extremely important with the firmness welded after automobile spot welding，General vehicle basic demand is maintained at more than 3mm at nugget size，Thus prior art effectively gets 2100 ready，And the present invention effectively to get ready be 2600，Thus effectively raise service life，And when vehicle welds，The spot welding quantity of each car is substantially 3000 solder joints，Thus in large-scale vehicle manufactures，The lifting processing consumptive material for this high consumption has this very important economic worth，Decrease the waste of consumptive material，Energy-conserving and environment-protective.
And number of effective points just can reach 2600 points after the subzero treatment time only 2h of the present invention, and number of effective points can only achieve 2100 points after prior art subzero treatment 4h, thus it is effectively reduced the production time, working (machining) efficiency is provided, and then decrease the waste of liquid nitrogen, thus meet the requirement of energy-conserving and environment-protective, thus show that prior art adds the poor effect in lifting life-span time increasing 2h-170 DEG C of situations, and the present invention processes 2h contrast in the case of-170 DEG C and processes 1.5h pair and had good lifting service life.
nullEmbodiment 5: the processing technique of a kind of automobile lifetime of resistance spot welding electrode cap，As shown in Figure 6，Choose diameter close with actual size，Reduce post-production cost，A polar cap outer circumferential sides face is made to carry out extruding shrinking to actually required size again，Carry out multistage during blanking to cut simultaneously，Improve work efficiency，And for the later stage polish length in reserve，Avoid produce electrode cap processing after too short，Thus form 39D 1978/1(58D8246/1) electrode cap，It is suitable for real work to use，And the compactness of electrode cap is improve through subzero treatment，Change inner element distribution，Improve conduction、Heat conductivility，Thus heat production reduces、The capacity of heat transmission improves，The tendency of bonding is produced when avoiding spot welding，Improve resistance to compression to burst deformability，Make have service life to be obviously improved，And energy consumption is low in the course of processing、Efficiency is high，It is suitable for large-scale production.
Subzero treatment improves lifetime mechanism explanation: after metal applies external electric field, and free electron obtains acceleration, just occurs directional migration to form electric current along external electric field direction；Free electron, during directional migration, constantly collides with cation, makes electron transfer be obstructed, thus produce resistance；If conductivity reduces when forming solid solution containing a small amount of impurity in metal, resistivity increases；Reason is owing to its foreign atom makes the normal structure of metal be distorted, and causes the scattering that electronics is extra；Form the segregation region that there is atom in uneven solid solution, i.e. solid solution when solute and solvent atom are at microcosmos area skewness, its composition is different from the average assay of solid solution, or there is shortrange order region in solid solution；These situations can scattered electron consumingly, and make uneven solid solution have high resistance value；Heat transfer process is the energy transport of material internal；Elastic distortion, dislocation and the lattice defects etc. that Solute Atoms In Solid Solution causes all can cause the scattering of electronics to make heat conductivity decline；When solid solution alloy has sequence structure, owing to the periodicity of dot matrix strengthens, make the mean free path of conduction electronics increase, thus its heat conductivity will significantly increase than time unordered；Additionally, because gas is the bad carrier of heat, if metallic perimeter has the hole that there is Dispersed precipitate gas encirclement or inside, the heat conductivity of material will be affected by and reduce；There is more micro-hole in non-subzero treatment electrode matrix, such organizational structure makes the electronics of displacement by violent scattering process, causes the electric conductivity of material and heat conductivity to decline；After subzero treatment, the micro-pore quantity in material is greatly reduced before untreated, and base densities degree is improved significantly, and therefore improves the conduction of electrode, heat conduction and non-deformability；Owing to chromium, zirconium both constituent elements content in Copper substrate are little, electrode material belongs to low concentration solid solution, under low concentration, the resistance of solid solution obeys Ma Tisen rule, in electrode copper alloy, the chromium of solid solution, zirconium separate out from matrix through subzero treatment and reduce the concentration of solute atoms in matrix, improve the purity of Copper substrate, thus reduce the additional resistance that solute element produces, improve the conduction of electrode copper alloy, the capacity of heat transmission；After subzero treatment, the crystal grain gap of copper alloy reduces, and almost reduces one times, so the intensity that subzero treatment can make electrode improves before untreated；After subzero treatment, Cr, Zr occur in that Cr, Zr granule of a large amount of Dispersed precipitate on Copper substrate, thus put forward heavy alloyed non-deformability；Obviously, subzero treatment makes electrode cap internal microstructure there occurs a series of change, improves the thermophysical property of electrode cap, electric conductivity and mechanical property, thus significantly improves the life-span of electrode cap.
This specific embodiment is only explanation of the invention; it is not limitation of the present invention; the present embodiment can be made after reading this specification by those skilled in the art as required does not has the amendment of creative contribution, but as long as all being protected by Patent Law in scope of the presently claimed invention.
Claims (10)
1. a processing technique for automobile lifetime of resistance spot welding electrode cap, is characterized in that: comprise the steps:
Step one: Feedstock treating: chromium-zirconium-copper rod (1) passes through solution treated；
Step 2: blanking: chromium-zirconium-copper rod (1) is cut off segmentation to be processed；
Step 3: first shaping: chromium-zirconium-copper rod (1) end face is carried out polishing formation installed surface (2), and another end face is worn into out protruding work portion (3), then make a polar cap outer circumferential sides face carry out extruding shrinking；
Step 4: cold extrusion: squeeze out taper hole (4) on installed surface (2) by extruder；
Step 5: hardening heat processes；
Step 6: reshaping: entered by taper hole (4) and position on lathe, carry out partial trim；
Step 7: grooving: outer circumferential sides facing goes out annular groove (5) in the middle part of electrode cap；
Step 8: polishing: outer surface carries out grinding process；
Step 9: subzero treatment: electrode cap is put into deep freeze refrigeration plant, is set as deep freeze refrigeration plant temperature under-150 ~-170 degree environment, and makes electrode cap take out after preserving 1.5 ~ 2 hours.
The processing technique of a kind of automobile lifetime of resistance spot welding electrode cap the most according to claim 1, it is characterized in that: described deep freeze refrigeration plant is exceeding cold seal container, exceeding cold seal stored in containers has liquid nitrogen, and in exceeding cold seal container, temperature is set as that-150 spend, and makes electrode cap take out after preserving 1.5 hours.
The processing technique of a kind of automobile lifetime of resistance spot welding electrode cap the most according to claim 1, it is characterized in that: described deep freeze refrigeration plant is exceeding cold seal container, exceeding cold seal stored in containers has liquid nitrogen, and in exceeding cold seal container, temperature is set as that-150 spend, and makes electrode cap take out after preserving 2 hours.
The processing technique of a kind of automobile lifetime of resistance spot welding electrode cap the most according to claim 1, it is characterized in that: described deep freeze refrigeration plant is exceeding cold seal container, being provided with liquid nitrogen vaporization jet pipe in exceeding cold seal container, in exceeding cold seal container, temperature is set as that-170 spend, and makes electrode cap take out after preserving 1.5 hours.
The processing technique of a kind of automobile lifetime of resistance spot welding electrode cap the most according to claim 1, it is characterized in that: described deep freeze refrigeration plant is exceeding cold seal container, being provided with liquid nitrogen vaporization jet pipe in exceeding cold seal container, in exceeding cold seal container, temperature is set as that-170 spend, and makes electrode cap take out after preserving 2 hours.
The processing technique of a kind of automobile lifetime of resistance spot welding electrode cap the most according to claim 1, is characterized in that: described taper hole (4) passes through secondary extrusion molding.
The processing technique of a kind of automobile lifetime of resistance spot welding electrode cap the most according to claim 1, is characterized in that: described installed surface (2) carries out inside and outside chamfering.
The processing technique of a kind of automobile lifetime of resistance spot welding electrode cap the most according to claim 1, is characterized in that: described hardening heat is processed as Ageing Treatment, temperature is 450-500 degree, and the time is 1.5-3 hour.
The processing technique of a kind of automobile lifetime of resistance spot welding electrode cap the most according to claim 1, is characterized in that: described projection is circular arc.
10. according to the processing technique of a kind of automobile lifetime of resistance spot welding electrode cap described in the claims any one, it is characterized in that: middle chromium-zirconium-copper of selecting materials rod (1) chooses a diameter of 16mm, in blanking, chromium-zirconium-copper rod (1) uniform cut becomes 23mm, squeeze out taper hole (4) a length of 10mm, a length of 22mm of holding electrode cap after polishing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610404871.9A CN105834700A (en) | 2016-06-08 | 2016-06-08 | Machining process for resistance spot-welding electrode cap of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610404871.9A CN105834700A (en) | 2016-06-08 | 2016-06-08 | Machining process for resistance spot-welding electrode cap of automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105834700A true CN105834700A (en) | 2016-08-10 |
Family
ID=56576502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610404871.9A Pending CN105834700A (en) | 2016-06-08 | 2016-06-08 | Machining process for resistance spot-welding electrode cap of automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105834700A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106425299A (en) * | 2016-10-31 | 2017-02-22 | 宣城军焊焊接科技有限公司 | Aluminum oxide P-type electrode cap machining process |
| CN108907632A (en) * | 2018-10-08 | 2018-11-30 | 天津维尔丁科技股份有限公司 | A kind of electrode cap production technology |
| CN112548295A (en) * | 2020-12-05 | 2021-03-26 | 钟丽慧 | Resistance spot welding method for automobile aluminum alloy |
| CN113146389A (en) * | 2021-05-11 | 2021-07-23 | 燕山大学 | Automatic grinding device and method for end face of micro electrode |
| CN114310198A (en) * | 2022-02-14 | 2022-04-12 | 丽水市隆信不锈钢线材有限公司 | High-cleanness, corrosion-resistant and high-strength stainless steel wire processing technology for ship and processing equipment thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1597223A (en) * | 2004-08-12 | 2005-03-23 | 中外合资常熟明辉焊接器材有限公司 | Manufacturing method of electrode cap used for welding automobile coated steel plate |
| CN101003869A (en) * | 2006-12-31 | 2007-07-25 | 苏州东金机械金属有限公司 | Chrome copper alloy, preparation method and application |
| WO2008085287A1 (en) * | 2006-12-22 | 2008-07-17 | Corning Incorporated | Step-down plunge electrodischarge machining |
| CN103290252A (en) * | 2012-05-17 | 2013-09-11 | 常熟明辉焊接器材有限公司 | High-strength and high-conductivity chromium zirconium copper alloy and processing technology thereof |
| CN203197449U (en) * | 2013-01-18 | 2013-09-18 | 众泰控股集团有限公司 | Electrode cap of welding electrode holder |
| CN204867779U (en) * | 2015-08-11 | 2015-12-16 | 格力电器（合肥）有限公司 | Spot welding electrode structure |
-
2016
- 2016-06-08 CN CN201610404871.9A patent/CN105834700A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1597223A (en) * | 2004-08-12 | 2005-03-23 | 中外合资常熟明辉焊接器材有限公司 | Manufacturing method of electrode cap used for welding automobile coated steel plate |
| WO2008085287A1 (en) * | 2006-12-22 | 2008-07-17 | Corning Incorporated | Step-down plunge electrodischarge machining |
| CN101003869A (en) * | 2006-12-31 | 2007-07-25 | 苏州东金机械金属有限公司 | Chrome copper alloy, preparation method and application |
| CN103290252A (en) * | 2012-05-17 | 2013-09-11 | 常熟明辉焊接器材有限公司 | High-strength and high-conductivity chromium zirconium copper alloy and processing technology thereof |
| CN203197449U (en) * | 2013-01-18 | 2013-09-18 | 众泰控股集团有限公司 | Electrode cap of welding electrode holder |
| CN204867779U (en) * | 2015-08-11 | 2015-12-16 | 格力电器（合肥）有限公司 | Spot welding electrode structure |
Non-Patent Citations (1)
| Title |
|---|
| 帅歌旺，周平建，刘建彬: "电阻点焊电极的研究进展与发展趋势", 《材料导报》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106425299A (en) * | 2016-10-31 | 2017-02-22 | 宣城军焊焊接科技有限公司 | Aluminum oxide P-type electrode cap machining process |
| CN106425299B (en) * | 2016-10-31 | 2018-06-19 | 宣城军焊焊接科技有限公司 | Aluminium oxide P-type electrode cap processing technology |
| CN108907632A (en) * | 2018-10-08 | 2018-11-30 | 天津维尔丁科技股份有限公司 | A kind of electrode cap production technology |
| CN112548295A (en) * | 2020-12-05 | 2021-03-26 | 钟丽慧 | Resistance spot welding method for automobile aluminum alloy |
| CN113146389A (en) * | 2021-05-11 | 2021-07-23 | 燕山大学 | Automatic grinding device and method for end face of micro electrode |
| CN113146389B (en) * | 2021-05-11 | 2022-07-29 | 燕山大学 | Automatic grinding device and method for end faces of micro electrodes |
| CN114310198A (en) * | 2022-02-14 | 2022-04-12 | 丽水市隆信不锈钢线材有限公司 | High-cleanness, corrosion-resistant and high-strength stainless steel wire processing technology for ship and processing equipment thereof |
| CN114310198B (en) * | 2022-02-14 | 2024-01-16 | 丽水市隆信不锈钢线材有限公司 | Processing technology and processing equipment for stainless steel wire for ship |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105834700A (en) | Machining process for resistance spot-welding electrode cap of automobile | |
| Shi et al. | Effect of in-process active cooling on forming quality and efficiency of tandem GMAW–based additive manufacturing | |
| CN111230301B (en) | Method for manufacturing steel thin-wall welding and other strong parts with aluminum or aluminum alloy coating | |
| CN111215751B (en) | Steel poor-strength welding part with aluminum or aluminum alloy coating and manufacturing method thereof | |
| Wu | Fabrication of nitinol materials and components | |
| US8350179B2 (en) | Application of surface relief to spot welding electrodes | |
| CN101270459B (en) | Method for improving welded joint fatigue strength following chilling treatment after weld toe TIG refusion | |
| US20090212025A1 (en) | Non-eutectic structure weld joint of copper-aluminum thin wall pipe and its manufacturing method | |
| Aspinwall et al. | Electrical discharge surface alloying of Ti and Fe workpiece materials using refractory powder compact electrodes and Cu wire | |
| CN105269137A (en) | Intermediate frequency spot welding method for aluminum alloy and zinc-plated high-strength steel dissimilar material | |
| CN111318785A (en) | Process for overlaying aluminum bronze on inner surface of coal mine liquid support 27SiMn oil cylinder | |
| CN110834139B (en) | Method for resistance spot welding of dissimilar metals | |
| CN107984062A (en) | A kind of welding method of SUS316 austenitic stainless steels and Weldox700E low-alloy quenched and tempered steel different steel welds | |
| CN105798555A (en) | Machining process of car resistance spot welding electrode cap | |
| CN112296492B (en) | Welding process method of dissimilar metal piece | |
| CN104895638B (en) | A kind of inlet valve of automobile engine | |
| CN110814499A (en) | Method for reducing grinding frequency of aluminum alloy spot welding electrode | |
| Han et al. | Study on Weldability of Aluminium Alloy TL091 in Resistance Spot Welding with Intermediate Frequency and Direct Current | |
| CN114147333A (en) | Resistance spot welding method for high-strength galvanized steel workpiece | |
| CN203509326U (en) | Spot-welding electrode for welding aluminum alloy | |
| CN110303229B (en) | Method for manufacturing high-strength steel through laminar plasma additive manufacturing | |
| CN203509324U (en) | Aluminum alloy spot-welding electrode capable of effectively preventing nugget skewing | |
| KR20180006154A (en) | Metal Sheets Spot Welding with Inoculation Agents | |
| CN115319235B (en) | Welding method of aluminum alloy medium plate | |
| KR20180056029A (en) | Metal sheets spot welding with inoculation agents |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160810 |