CN101972888B - Automobile shock absorber support projection welding floating tool - Google Patents
Automobile shock absorber support projection welding floating tool Download PDFInfo
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- CN101972888B CN101972888B CN 201010504910 CN201010504910A CN101972888B CN 101972888 B CN101972888 B CN 101972888B CN 201010504910 CN201010504910 CN 201010504910 CN 201010504910 A CN201010504910 A CN 201010504910A CN 101972888 B CN101972888 B CN 101972888B
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Abstract
The invention discloses an automobile shock absorber support frame projection welding floating tool, which relates to spot welding equipment and consists of a projection welding floating universal base, a replaceable automobile shock absorber support positioning frame, a replaceable positioning frame positioning mechanism, a wedge-shaped pressing mechanism, an upper electrode seat and a lower electrode seat, wherein the replaceable automobile shock absorber support positioning frame is arranged on the projection welding floating universal base through the replaceable positioning frame positioning mechanism and the wedge-shaped pressing mechanism, the projection welding floating universal base is arranged on a casing of a projection welder, the upper electrode seat is arranged under an upper electrode plate of the projection welder, and a lower electrode is arranged on a lower electrode plate of the projection welder. A spring is used for buffering in welding contact moment, thus the tool is stable and reliable, the salient point plastic deformation can not be caused, the salient point size is prevented from being changed by the upper electrode cylinder impact, and the welding strength stability is good.
Description
Technical field
The present invention relates to spot-welding equipment, especially for the equipment of vehicle shock absorber support projection welding.
Background technology
Since the 1950's, the Automobile Manufacture Industry in China solder technology is main with manual welding and electric resistance welding mainly.The resistance welder process has advantages such as production efficiency height, even structure be reliable, therefore makes the field extensive use at auto parts and components.Along with the development of China auto manufacturing, solder technology has obtained great advance, still compares with the auto industry of developed country also to have huge gap.Auto industry is an industry-global business, and abroad, French Renault and Japanese Nissan motor corporation have all adopted the driver's cabin of the full robot line that is welded, and the assembling of driver's cabin, gluing, spot welding are all accomplished by robot.At home, problem causes the utilization rate of welding robot in the auto parts and components manufacturing low because the developed country that compares of the whole industrial level of automobile industry also has a certain distance, and, technological equipment design level relatively poor such as the repeatable accuracy of part is lower etc.In the face of international competition globalization, the international situation of domestic compentition; For Domestic Automotive Industry can be occupied a tiny space in world's developing of automobile industry; Have the raising that relies on the improvement of Manufacturing Technology and the innovation ability that comprise solder technology only, could realize the target of Chinese Automobile Industry ' independent development capability.
Shock absorber is connected between body of a motor car and the vehicle bridge, belongs to the vitals in the automobile suspension system, can increase security, the comfortableness to vehicle on the one hand; The vehicle shock absorber support is according to booster actions such as support and rat tail support, QS, oil pipe are arranged on the other hand; Its position dimension and form and position tolerance except guaranteeing spare part; Also to guarantee the requirement of part welding shearing force equal strength, so the welding of vehicle shock absorber support belongs to the technological difficulties of shock absorber manufacture process.
The projection welding technology is a kind of new solder technology that on the spot welding basis, grows up.Be best suited for the welding of mild steel; It is that the profile of utilizing the raised points that processes in advance or part intrinsic, chamfering etc. are the contact-making surface between the part; The electric resistance welding that makes these contact points formation solder joints after collapsing is pressed in upper/lower electrode pressurization and energising heating (function of upper/lower electrode is to transmit pressure-clamping workpiece and location-transmission current-the lead part heat of loose weldment and weld zone).Pressure between weldment on the unit are and electric current are shunted lessly, help improving welding quality.The welding deformation that workpiece produces during projection welding is little, and lack (generally between 0.1-2S) weld interval, and often be that a plurality of salient points weld simultaneously, so welding production efficiency is high.
According to the characteristics of automobile damper bracket, the projection welding technology has become the process means of main employing.Like Figure 16, shown in 17 support 801 is welded on the oil tube assembly assembly 802, guarantee 15 ° ± 2 ° of design sizes; 54 ± 0.5; Welding shearing force 9.8kN.Support 801 is that mild steel is stamped to form, and is designed with two salient points on the part, uses 200 projection welders, utilizes the back welding of self-control frock (referring to Figure 18) location.
Under the demands status of market multi-varieties and small-batch, my company has product kind more than 200 at present, and position and the size of support on oil tube assembly have nothing in common with each other, and contoured cradle has nothing in common with each other, and seems particularly outstanding so make the problem of positioning tool by oneself.Through serious analysis and research, the common problem that shows is come back as follows to present technological equipment:
1, mould replacing time is long: owing to support 801, an oil tube assembly assembly 802 are separately fixed at top electrode 1A and bottom electrode 2A; Top electrode 1A and bottom electrode 2A do not have the mechanism of aligning; In case the replacing product, the part position size just must be readjusted according to the following steps: range estimation dress mould → little electric current welding → detection size → by the difference in size of adjusting move upper/lower electrode position → little electric current welding → detection size → ... → till size is qualified.This method of adjustment needs 1-2h at least to experienced operators, and for the new employee, time that die change needs even 4-6h nearly have a strong impact on manufacturing schedule;
2, quality state is unstable: positioning accuracy is poor: because welding process is the process of a part energising pressurized, support 801 is positioned at top electrode, and oil tube assembly assembly 802 is positioned at bottom electrode 2A, and it is bigger influenced by human factor; Weld strength is unstable on the other hand and since part respectively clamping on upper/lower electrode, rigid collision during the welding process contact, the little pressure of salient point contact area is big, precompressed process salient point produces plastic deformation, bump size changes to some extent, weld strength is unstable;
3, the frock debugging cost is high: because the die change process needs little electric current welding back → detection size to readjust the frock position again, the part in the debugging welding process can't carry out secondary welding, scraps totally, has increased production cost of products;
4, the frock cost is high: because the material of whole frock 90% adopts red copper, the cost of frock is very high.An a kind of support welding of product, the expense of only calculating the frock material reaches 6000～8000 yuan, and there are 200 multiple products in my company at present, two supports of 80% product needed welding is arranged, so the frock expense of product is a no small number.And the red copper material purchases cycle is long, and welding process receives thermal wear very fast, and available part seldom just must monoblock be scrapped after the wearing and tearing on the cube electrode, needs additional frock expense also quite big;
5, the frock safety coefficient is low: support adopts the shell fragment clamping to be positioned at top electrode 1A, and shell fragment is loosening easily, and welding process drops easily under the gravity effect, and because welding process is heated, the life-span of shell fragment is very short.Shell fragment loosening or receive thermal failure for a long time after, the operator is through hand commonly used or change cutter and help part, has very big potential safety hazard;
6, the welding process loss is big: because the part welding process is except that salient point, all the other contact-making surfaces do not have any insulation measures, and shunting is serious, and energising welding process workpiece discharges easily with the frock contact site and wounds, so energy loss is serious, the weldment presentation quality is poor.
Summary of the invention
For solving the problems of the technologies described above, the present invention provides following technical scheme:
The vehicle shock absorber support projection welding frock of floating, by
Projection welding float general base, can change the automobile damper bracket locating rack, can change the locating rack detent mechanism, wedge shape hold-down mechanism, top electrode seat and lower electrode holder constitute;
Can change the automobile damper bracket locating rack is installed on the unsteady general base of projection welding through changing locating rack detent mechanism and wedge shape hold-down mechanism; The unsteady general base of said projection welding is installed on the housing of projection welder; The top electrode seat is installed under the electric pole plate of projection welder, and lower electrode holder is installed on the lower electrode plate of projection welder.
The unsteady general base of said projection welding is made up of upper plate, insulating base, spring, guide pillar, lower shoe and guide pin bushing; Said upper plate, guide pillar, lower shoe and guide pin bushing adopt 45 steels to make;
Said upper plate has the bottom electrode hole that is used to pass lower electrode holder; With bolt guide pillar is installed under the said upper plate; Be provided with insulation sleeve between aforementioned bolt and upper plate; Said insulating base is installed between upper plate and the guide pillar, and said guide pillar is set with spring and guide pin bushing from top to bottom successively, and the guide pillars and bushes cunning is led cooperation; Said guide pin bushing is installed on the lower shoe, and said lower shoe is installed on the housing of projection welder.
Said change the automobile damper bracket locating rack by base plate, back backstay back-up block, back backstay, align fixture block, two V-type support plates, cylinder, block rubber and cylinder back-up blocks constitute; Said base plate, back backstay back-up block, back backstay, align fixture block, V-type support plate and cylinder back-up block and adopt steel to make;
Said base plate is equipped with back backstay back-up block, two V-type support plates, cylinder back-up block from left to right or from right to left successively, and said base plate has the electrode ports that is used to pass lower electrode holder two V-type support plate position intermediate;
Said back backstay; Be used for the automobile damper bracket axial location and locate, be installed in the inboard of the set through hole in backstay back-up block upper end, said back; The aforementioned through-hole outside is equipped with the bolt of fine setting back backstay radial position; Said back backstay back-up block also is provided with the fastening bolt of fastening back backstay, and the fixture block that aligns that is used for automobile damper bracket radial angle location is installed on the backstay of said back;
The pushing block that cylinder, said cylinder are installed on the said cylinder back-up block is provided with and is used to protect automobile damper bracket and anti-skidding block rubber.
The said locating rack detent mechanism that changes is used for changing the automobile damper bracket locating rack and on the location of horizontal level on the upper plate and vertical direction, compresses, and is made up of limited block and positioning wedged block; Said limited block and positioning wedged block adopt steel to make;
Said limited block is installed in the inboard of said upper plate upper surface, and said positioning wedged block is installed in the inboard outer rim of said base plate;
Said limited block is " protruding " type, and said positioning wedged block is " recessed " type; It is up-small and down-big trapezoidal that the part that limited block inserts positioning wedged block is, and positioning wedged block is inserted into partial shape and cooperates with the part that aforementioned limited block inserts positioning wedged block, and behind the limited block insertion positioning wedged block, positioning wedged block will be pushed down limited block.
Said wedge shape hold-down mechanism is used for changing the automobile damper bracket locating rack and on vertical direction on the upper plate, compresses and can change the automobile damper bracket locating rack and compress to the limited block direction, by housing screw, compact heap, decide skewback, moving skewback constitutes; Said compact heap, decide skewback, moving skewback adopts and makes;
Said housing screw and decide skewback, be installed in the outside of said upper plate upper surface, said moving skewback is installed in said plate outer side outer rim;
Said compact heap is rounding taper type or the shape of falling the bucking ladder, is sleeved on the housing screw, saidly decides skewback and moving skewback is provided with the inclined-plane that cooperates with compact heap.
Said top electrode seat is " T " shape, is provided with the top electrode installing hole at the following wall of " T " shape, and the top electrode seat adopts flexible.
The end face of said lower electrode holder is provided with the cross positioning strip, and lower electrode holder adopts flexible.
Said top electrode seat is provided with cross recirculated cooling water road, and said lower electrode holder is provided with cross recirculated cooling water road.
Beneficial effect of the present invention is:
1, on a whole set of frock; The part projection welding that need not to conduct electricity float general base, can change the automobile damper bracket locating rack, can change locating rack detent mechanism and wedge shape hold-down mechanism) adopt 45 steel or respective standard part; And between localization part insulation upper plate and guide pillar, insulate), reduce frock cost and energy consumption effectively; Also avoid simultaneously V-type support plate and automobile damper bracket contact discharge to wound and influence the product appearance quality.(referring to Fig. 1)
2, the guide pillar of the unsteady general base of projection welding and last end face are provided with insulation sleeve and insulating base insulation, avoid the part that prevents of welding process distributary phenomenon to wound, and influence outward appearance; It is big to weld immediate current density in addition, the welding process steady quality, and weld strength is stable.(referring to Fig. 2)
3, welding contact moment spring buffer, steadily reliable, avoid the impact of top electrode cylinder to cause the salient point plastic deformation and change the salient point size, the weld strength good stability (.Referring to Fig. 2,3)
4, increase the cylinder that holds out against automobile damper bracket on, guaranteed positioning accuracy.(referring to Fig. 4,5)
5, rely on back backstay and align the location of fixture block, guarantee the dimensional accuracy of soldering part angle the automobile damper bracket circumferencial direction.(referring to Fig. 6～9)
6, the position dimension of design initial compute location fixture block is realized automobile damper bracket locating rack quick change, and it is replaceable only need to back out housing screw during replacing.(referring to Figure 10)
7, adopt split type electrode (electrode design is electrode tip holder and electrode tip), the part that contacts with part is removable electrode tip, adopts chromium zirconium copper, and remaining adopts red copper, and behind the wear to electrodes, the electrode tip that only needs to change fritter gets final product, and avoids the electrode material waste.
8, on upper and lower electrode tip holder, increase cross recirculated cooling water road, reduce the frock wearing and tearing, improve welding quality.
9, in actual job, the top electrode seat is fixedly mounted on the projection welder, and top electrode has the double-U-shaped groove that cooperates with the top electrode seat, through the Fast Installation of screw realization with electrode tip holder.
10, lower electrode holder is fixed on the projection welder lower electrode plate, and replaceable electrode is connected dependence cross positioning strip location with lower electrode holder, and screw connects the purpose that reaches quick die change and guarantee positioning accuracy.(referring to Figure 14,15)
Fields such as the present invention also can be applicable to the projection welding of damper bracket nut, the projection welding of lower joint sleeve assembly, hangs the sealing assembly projection welding, the spot welding of connecting rod buffing pad.
Description of drawings
Fig. 1 assembles sketch (band power on cartridge and bottom electrode head) for the present invention;
Fig. 2 is the unsteady general base front view of projection welding of the present invention;
Fig. 3 is the unsteady general base vertical view view of projection welding of the present invention;
Fig. 4 can change automobile damper bracket locating rack front view for the present invention;
Fig. 5 can change automobile damper bracket locating rack vertical view for the present invention;
Fig. 6 is backstay front view behind the present invention;
Fig. 7 is backstay left view behind the present invention;
Fig. 8 aligns the fixture block front view for the present invention;
Fig. 9 aligns the fixture block left view for the present invention;
Figure 10 can change locating rack detent mechanism front view for the present invention;
Figure 11 is a wedge shape hold-down mechanism front view of the present invention;
Figure 12 is a top electrode seat front view of the present invention;
Figure 13 is a top electrode seat left view of the present invention;
Figure 14 is a lower electrode holder front view of the present invention;
Figure 15 is a lower electrode holder vertical view of the present invention;
Figure 16 is the front view of the automobile damper bracket that the present invention welded;
Figure 17 is the left view of the automobile damper bracket that the present invention welded;
Figure 18 is the frock of existing welding of automotive shock absorber support;
1, the projection welding general base that floats, 101, upper plate, 1011, the bottom electrode hole, 102, insulating base, 103, spring, 104, guide pillar; 105, lower shoe, 106, guide pin bushing, 2, can change the automobile damper bracket locating rack, 201, base plate, 2011, electrode hole, 202, back backstay back-up block; 203, back backstay, 204, align fixture block, 205, the V-type support plate, 206, block rubber, 207, cylinder, 2071, pushing block; 208, cylinder back-up block, 3, can change the locating rack detent mechanism, 301, limited block, 302, positioning wedged block, 4, the wedge shape hold-down mechanism, 401, housing screw; 4011, compact heap, 402, decide skewback, 403, moving skewback, 5, the top electrode seat, 501, the top electrode installing hole, 6, lower electrode holder; 601, cross positioning strip, 7, mash welder, 8, automobile damper bracket, 801, support, 802, oil tube assembly assembly; 9, electric pole plate, 10 lower electrode plates, 1A, top electrode, 2A, bottom electrode, 3A, substrate, 4A, rear position plate, 5A, projection welder guide pillar.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is explained further details:
The unsteady frock of vehicle shock absorber support provided by the present invention projection welding is the projection welding that is exclusively used in the vehicle shock absorber support.By
Projection welding float general base 1, can change automobile damper bracket locating rack 2, can change locating rack detent mechanism 3, wedge shape hold-down mechanism 4, top electrode seat 5 and lower electrode holder 6 constitute;
Can change automobile damper bracket locating rack 2 is installed on the unsteady general base 1 of projection welding with wedge shape hold-down mechanism 4 through changing locating rack detent mechanism 3; Two gripper shoes of symmetry welding on lower electrode plate 10 both sides projection welder housings; The unsteady general base 1 of projection welding is installed on the aforementioned gripper shoe; Top electrode seat 5 is installed in the electric pole plate 9 times of projection welder, and lower electrode holder 6 is installed on the lower electrode plate 10 of projection welder.
The unsteady general base 1 of said projection welding is made up of upper plate 101, insulating base 102, spring 103, guide pillar 104, lower shoe 105 and guide pin bushing 106; Said upper plate 101, guide pillar 104, lower shoe 105 and guide pin bushing 106 adopt 45 steels to make;
Said upper plate 101 has the bottom electrode hole 1011 that is used to pass lower electrode holder; Said upper plate 101 times is equipped with guide pillar 104 with bolt; 101 of aforementioned bolt and upper plates are provided with insulation sleeve; Said insulating base 102 is installed between upper plate 101 and the guide pillar 104, and said guide pillar 104 is set with spring 103 and guide pin bushing 106 from top to bottom successively, and guide pillar 104 is slided with guide pin bushing 106 and led cooperation; Said guide pin bushing 106 is installed on the lower shoe 105, and said lower shoe 105 is installed on aforesaid two gripper shoes of projection welder.
Can change automobile damper bracket locating rack 2 by base plate 201, back backstay back-up block 202, back backstay 203, align fixture block 204, two V-type support plates 205, cylinder 207, block rubber 206 and cylinder back-up blocks 208 constitute; Base plate 201, back backstay back-up block 202, back backstay 203, align fixture block 204, V-type support plate 205 and cylinder back-up block 208 and adopt 45 steels to make;
The pushing block 2071 that cylinder back-up block 208 upper ends are equipped with cylinder 207, cylinder 207 is provided with and is used to protect automobile damper bracket 8 and anti-skidding block rubber 206.
Can change the locating rack detent mechanism, be used for to change automobile damper bracket locating rack 2 and on the location of horizontal level on the upper plate 101 and vertical direction, compress, constitute by limited block 301 and positioning wedged block 302; Limited block 301 adopts 45 steels to make with positioning wedged block 302;
Wedge shape hold-down mechanism 4; Be used for changing automobile damper bracket locating rack 2 and on vertical direction on the upper plate 101, compress and can change automobile damper bracket locating rack 2 and compress to limited block 301 directions, by housing screw 401, compact heap 4011, decide skewback 402, moving skewback 403 constitutes; Compact heap 4011, decide skewback 402, moving skewback 403 adopts 45 to make;
The end face of lower electrode holder 6 is provided with cross positioning strip 601, and lower electrode holder 6 adopts flexible, and lower electrode holder 6 is provided with cross recirculated cooling water road.
Operating procedure of the present invention is: select to change automobile damper bracket locating rack → support as required and put into bottom electrode → oil tube assembly and put into and can change automobile damper bracket locating rack → press start button → cylinder and promote block rubber and clamp oil tube assembly → begin welding (top electrode puts down) → welding and accomplish (top electrode rises) → cylinder and unclamp → spring recoverys → taking-up automobile damper bracket, all the other move automatic completion to whole process except that putting into workpiece.
Claims (6)
1. the vehicle shock absorber support projection welding frock of floating, by
Projection welding float general base (1), can change automobile damper bracket locating rack (2), can change locating rack detent mechanism (3), wedge shape hold-down mechanism (4), top electrode seat (5) and lower electrode holder (6) constitute;
The said automobile damper bracket locating rack (2) that changes is installed on the unsteady general base (1) of projection welding through changing locating rack detent mechanism (3) and wedge shape hold-down mechanism (4); The unsteady general base (1) of said projection welding is installed on the housing of projection welder; Said top electrode seat (5) is installed under the electric pole plate (9) of projection welder, and said lower electrode holder (6) is installed on the lower electrode plate (10) of projection welder;
Said projection welding is floated general base (1) by upper plate (101), insulating base (102), spring (103), guide pillar (104), lower shoe (105) and guide pin bushing (106) formation; Said upper plate (101), guide pillar (104), lower shoe (105) and guide pin bushing (106) adopt 45 steels to make;
Said upper plate (101) has the bottom electrode hole (1011) that is used to pass lower electrode holder; With bolt guide pillar (104) is installed under the said upper plate (101); Aforementioned bolt and upper plate are provided with insulation sleeve between (101); Said insulating base (102) is installed between upper plate (101) and the guide pillar (104), and said guide pillar (104) is set with spring (103) and guide pin bushing (106) from top to bottom successively, and guide pillar (104) and guide pin bushing (106) are slided and led cooperation; Said guide pin bushing (106) is installed on the lower shoe (105), and said lower shoe is installed on the housing of projection welder;
It is characterized in that:
Said change automobile damper bracket locating rack (2) by base plate (201), back backstay back-up block (202), back backstay (203), align fixture block (204), two V-type support plates (205), cylinder (207), block rubber (206) and cylinder back-up block (208) formation; Said base plate (201), back backstay back-up block (202), back backstay (203), align fixture block (204), V-type support plate (205) and make with cylinder back-up block (208) employing 45 steels;
Said base plate (201) is equipped with back backstay back-up block (202), two V-type support plates (205), cylinder back-up block (208) from left to right or from right to left successively, and said base plate (201) has the electrode ports (2011) that is used to pass lower electrode holder in two V-type support plates (205) position intermediate;
Said back backstay (203); Be used for automobile damper bracket (8) axial location and locate, be installed in the inboard of the set through hole in said back backstay back-up block (202) upper end; The aforementioned through-hole outside is equipped with the bolt of fine setting back backstay (203) radial position; Said back backstay back-up block (202) also is provided with the fastening bolt of fastening back backstay (203), be equipped with on the said back backstay (203) be used for automobile damper bracket (8) radial angle location align fixture block (204);
The pushing block (2071) that cylinder (207), said cylinder (207) are installed on the said cylinder back-up block (208) is provided with and is used to protect automobile damper bracket (8) and anti-skidding block rubber (206).
2. the vehicle shock absorber support according to claim 1 projection welding frock of floating is characterized in that:
The said locating rack detent mechanism that changes is used for changing on automobile damper bracket locating rack (2) goes up horizontal level at upper plate (101) location and the vertical direction and compresses, by limited block (301) and positioning wedged block (302) formation; Said limited block (301) and positioning wedged block (302) adopt 45 steels to make;
Said limited block (301) is installed in the inboard of said upper plate (101) upper surface, and said positioning wedged block (302) is installed in the inboard outer rim of said base plate (201);
Said limited block (301) is " protruding " type, and said positioning wedged block (302) is " recessed " type; It is up-small and down-big trapezoidal that the part that limited block (301) inserts positioning wedged block (302) is; Positioning wedged block (302) is inserted into partial shape and cooperates with the part that aforementioned limited block (301) inserts positioning wedged block (302); After limited block (301) inserts positioning wedged block (302), positioning wedged block (302) will be pushed down limited block (301).
3. the vehicle shock absorber support according to claim 1 projection welding frock of floating is characterized in that:
Said wedge shape hold-down mechanism (4); Be used for to change automobile damper bracket locating rack (2) and on upper plate (101) is gone up vertical direction, compress and can change automobile damper bracket locating rack (2) and compress, by housing screw (401), compact heap (4011), decide skewback (402), moving skewback (403) formation to limited block (301) direction; Said compact heap (4011), decide skewback (402), moving skewback (403) adopts 45 to make;
Said housing screw (401) and decide skewback (402), be installed in the outside of said upper plate (101) upper surface, said moving skewback (403) is installed in said base plate (201) outside outer rim;
Said compact heap (4011) is rounding taper type or the shape of falling the bucking ladder, is sleeved on the housing screw (401), saidly decides skewback (402) and moving skewback (403) is provided with the inclined-plane that cooperates with compact heap (4011).
4. the vehicle shock absorber support according to claim 1 projection welding frock of floating, it is characterized in that: said top electrode seat (5) is " T " shape, is provided with top electrode installing hole (5) at the following wall of " T " shape, and top electrode seat (5) adopts flexible.
5. the vehicle shock absorber support according to claim 1 projection welding frock of floating, it is characterized in that: the end face of said lower electrode holder (6) is provided with cross positioning strip (601), and lower electrode holder (6) adopts flexible.
6. according to claim 4 or the unsteady frock of 5 described vehicle shock absorber support projection weldings, it is characterized in that: said top electrode seat (5) is provided with cross recirculated cooling water road, and said lower electrode holder (6) is provided with cross recirculated cooling water road.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010504910 CN101972888B (en) | 2010-10-13 | 2010-10-13 | Automobile shock absorber support projection welding floating tool |
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| CN 201010504910 CN101972888B (en) | 2010-10-13 | 2010-10-13 | Automobile shock absorber support projection welding floating tool |
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| CN101972888B true CN101972888B (en) | 2012-09-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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