CN104308352A - Combined projection welding insulated dowel - Google Patents
Combined projection welding insulated dowel Download PDFInfo
- Publication number
- CN104308352A CN104308352A CN201410546884.0A CN201410546884A CN104308352A CN 104308352 A CN104308352 A CN 104308352A CN 201410546884 A CN201410546884 A CN 201410546884A CN 104308352 A CN104308352 A CN 104308352A
- Authority
- CN
- China
- Prior art keywords
- nut
- locating
- dowel
- projection welding
- screw rod
- 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.)
- Granted
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Classifications
-
- 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
- B23K11/36—Auxiliary equipment
-
- 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
- B23K11/14—Projection welding
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Insertion Pins And Rivets (AREA)
Abstract
The invention discloses a combined projection welding insulated dowel which comprises a dowel base and a locating boss, wherein the dowel base comprises a spring guide post, a disc and a long cylindrical body which are sequentially arranged; the diameter of the spring guide post is smaller than that of the long cylindrical body, and the diameter of the long cylindrical body is smaller than that of the disc; one end, which is opposite to the disc, of the long cylindrical body is a welded plate locating surface; the welded plate locating surface is provided with a threaded hole; a locating boss comprises a screw rod, a plate hole locating post and a nut guide post which are sequentially arranged; the diameters of the screw rod and the nut guide post are smaller than that of the plate hole locating post; external threads of the screw rod are matched with the hole diameter of a threaded hole formed in the long cylindrical body; a step surface between the screw rod and the plate hole locating post is adhered to the end surface of the long cylindrical body; the locating boss is made of a silicon nitride or blue zirconia material. The combined projection welding insulated dowel is long in service life, precise in locating and low in cost.
Description
Technical field
The invention belongs to weld jig technical field, particularly a kind of combined type projection welding insulated dowel.
Background technology
Project-welding nut widely uses in automobile manufacturing process, project-welding nut requires that nut and the coaxial precision of punching press piece bores want high, postwelding is little without welding slag, deformed threads amount, these three keys required can be met and be the alignment pin that project-welding nut is used, require wear-resisting, good toughness, heat shock resistance, shunts little in welding process.
Alignment pin conventional at present has two kinds of mainstay, one is that alignment pin adopts metal material, the object that insulating materials reaches insulation is added between alignment pin and bottom electrode centre bore, the advantage of this way is that the toughness of metal material is better, not frangibility, energy resistance to shock loads, shortcoming is that thermal shock resistance is poor, wearing and tearing are easy in welding process, the alignment pin life-span is shorter, the problem of portion of electrical current shunting can only be solved, nut can not be solved, alignment pin, path between part, tolerance in addition between the positioning boss diameter of the alignment pin of this material and nut thread path is larger, locate not too accurate, another kind of alignment pin is ceramic material, pottery alignment pin can solve the problem of current distributing completely, because its coefficient of expansion is low, also the tolerance between positioning boss and nut thread path can be reduced, improve positioning precision, ceramic material is wear-resisting, can normally work at relatively high temperatures, shortcoming is that general ceramic material alignment pin toughness is poor, easily fracture in use procedure, for some special cermacises, as silicon nitride and blue zirconium oxide ceramic, they are used in project-welding nut as alignment pin and show outstanding performance, but this kind of material is more expensive, limit the popularity that it uses.
Summary of the invention
The object of the present invention is to provide a kind of long service life, registration, and combined type projection welding insulated dowel with low cost.
The technical solution realizing the object of the invention is:
A kind of combined type projection welding insulated dowel, comprise alignment pin pedestal and positioning boss, alignment pin pedestal comprises the spring lead set gradually, disk and elongated cylinder, wherein, the diameter of spring lead is less than elongated cylinder, the diameter of elongated cylinder is less than disk, elongated cylinder and the opposing one end of disk are welded plates locating surface, welded plates locating surface has screwed hole, positioning boss comprises the screw rod set gradually, plate hole locating dowel, nut lead, wherein, the diameter of screw rod and nut lead is all less than plate hole locating dowel, the external screw thread of screw rod matches with the aperture of the screwed hole that elongated cylinder has, step surface between screw rod and plate hole locating dowel and the end face of elongated cylinder are fitted, positioning boss is silicon nitride or blue oxide zirconia material.
The present invention compared with prior art, its remarkable advantage:
(1) positioning boss of the present invention is special ceramic material, and welding process can not cause shunting, and screw thread can not be impaired because electric current flows through, avoid the local welding of alignment pin and nut, and wear-resisting, high temperature resistant, welding slag does not adhere to positioning boss, the long service life of alignment pin.
(2) positioning boss of the present invention is special ceramic material, because the coefficient of expansion is little, welding process will make plate not easily take off from electrode because of expanded by heating, plate hole and plate hole locating dowel, the diameter of thread of nut and the tolerance of nut lead can reduce in addition, make the location of plate and nut more accurate, ensure that their axiality.
(3) alignment pin pedestal of the present invention adopts metal material, and avoiding whole alignment pin is all that special cermacis brings expensive cost to drop into.
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of combined type projection welding insulated dowel positioning boss of the present invention.
Fig. 2 is the structural representation of combined type projection welding insulated dowel alignment pin pedestal of the present invention.
Fig. 3 is the general structure schematic diagram of combined type projection welding insulated dowel of the present invention.
Detailed description of the invention
Composition graphs 1 ~ Fig. 3:
A kind of combined type projection welding of the present invention insulated dowel, comprise alignment pin pedestal and positioning boss, alignment pin pedestal comprises the spring lead 1 set gradually, disk 2 and elongated cylinder 3, wherein, the diameter of spring lead 1 is less than elongated cylinder 3, the diameter of elongated cylinder 3 is less than disk 2, elongated cylinder 3 one end opposing with disk 2 is welded plates locating surface 4, welded plates locating surface 4 has screwed hole 5, positioning boss comprises the screw rod 6 set gradually, plate hole locating dowel 7, nut lead 9, wherein, the diameter of screw rod 6 and nut lead 9 is all less than plate hole locating dowel 7, the external screw thread of screw rod 6 matches with the aperture of the screwed hole 5 that elongated cylinder 3 has, the end face of the step surface between screw rod 6 and plate hole locating dowel 7 and elongated cylinder 3 is fitted, positioning boss is silicon nitride or blue oxide zirconia material.
Alignment pin pedestal is metal material.Avoid whole alignment pin to be special ceramic material, make alignment pin cost higher.
The length of plate hole locating dowel 7 is greater than thickness and the nut 11 bump height sum of welded plates 10.If the length of plate hole locating dowel 7 is less than thickness and the nut 11 bump height sum of welded plates 10, nut locating surface 8 can not fit tightly with the lower surface of nut 11, gap can be produced, welding slag in welding process can enter screwed hole 5 by this gap, stick on screw thread, thus lose due effect of alignment pin.
The length of nut lead 9 is less than the length in nut 11 hole.The long one side of nut lead 9 can make the cost of positioning boss higher, need on the other hand to open a centre bore at center, top electrode lower surface, otherwise top electrode can directly be pushed down alignment pin and move downward, nut locating surface 8 and nut lower surface is made to produce gap, welding slag in welding process can enter screwed hole 5 by this gap, sticks on screw thread.
Step surface between plate hole locating dowel 7 and nut lead 9 is nut locating surface 8, arc transition is adopted between nut locating surface 8 and nut lead 9, when adopting arc transition to be to prevent nut lead 9 to be subject to pressure perpendicular to axial direction, transitional region being unlikely to because stress concentrates and fractureing.
Nut lead 9 end adopts chamfering to arrange or fillet is arranged, and on alignment pin during placing nut, the chamfering on nut lead 9 or fillet play the effect of guiding can to nut 11.
Working method:
Before using, coaxially assemble positioning boss and alignment pin pedestal, the step surface between guarantee screw rod 6 and plate hole locating dowel 7 and the end face of elongated cylinder 3 are fitted.
During use, alignment pin is correctly arranged in bottom electrode, and the elongated cylinder 3 of alignment pin pedestal becomes matched in clearance with bottom electrode centre bore, and spring lead connects back-moving spring; Welded plates 10 is placed on alignment pin, positioning boss is through plate hole, welded plates 10 lower surface and welded plates locating surface 4 are fitted, axial location is carried out in locating dowel 9 pairs of welded plates 10 holes in hole, the nut locating surface 8 of nut 11 lower surface and positioning boss is fitted, and axial location is carried out in nut lead 9 pairs of nut 11 holes.
During welding, nut 11 lives under positioning boss makes alignment pin to move at top electrode pressure, after welded plates 10 contacts with bottom electrode upper surface, welded plates 10 and welded plates locating surface 4 depart from, at this moment, the locating surface of welded plates 10 is bottom electrode upper surface, alignment pin continues downwards, nut 11 salient point contacts with welded plates 10, enter pre-pressing stage, when entering the welding stage, only having nut 11 and the path of welded plates 10 between nut 11, positioning boss and welded plates 10, achieving the object avoiding shunting.
Structure of the present invention is simple, is easy to realize, and can solve the shunting problems in project-welding nut process, avoid screw thread impaired, reduces welding slag, improves the service life of alignment pin, makes welding process change to smoothness, enhance productivity.
Claims (6)
1. a combined type projection welding insulated dowel, it is characterized in that: comprise alignment pin pedestal and positioning boss, alignment pin pedestal comprises the spring lead (1) set gradually, disk (2) and elongated cylinder (3), wherein, the diameter of spring lead (1) is less than elongated cylinder (3), the diameter of elongated cylinder (3) is less than disk (2), the opposing one end of elongated cylinder (3) and disk (2) is welded plates locating surface (4), welded plates locating surface (4) has screwed hole (5), positioning boss comprises the screw rod (6) set gradually, plate hole locating dowel (7), nut lead (9), wherein, the diameter of screw rod (6) and nut lead (9) is all less than plate hole locating dowel (7), the external screw thread of screw rod (6) matches with the aperture of the screwed hole (5) that elongated cylinder (3) has, the end face of the step surface between screw rod (6) and plate hole locating dowel (7) and elongated cylinder (3) is fitted, positioning boss is silicon nitride or blue oxide zirconia material.
2. combined type projection welding insulated dowel according to claim 1, is characterized in that: described alignment pin pedestal is metal material.
3. combined type projection welding insulated dowel according to claim 1, is characterized in that: the length of described plate hole locating dowel (7) is greater than thickness and nut (11) the bump height sum of welded plates (10).
4. combined type projection welding insulated dowel according to claim 1, is characterized in that: the length of described nut lead (9) is less than the length in nut (11) hole.
5. combined type projection welding insulated dowel according to claim 1, it is characterized in that: the step surface between described plate hole locating dowel (7) and nut lead (9) is nut locating surface (8), adopts circular sliding slopes between nut locating surface (8) and nut lead (9).
6. combined type projection welding insulated dowel according to claim 1, is characterized in that: described nut lead (9) end adopts chamfering to arrange or fillet is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410546884.0A CN104308352B (en) | 2014-10-15 | 2014-10-15 | Combined type projection welding insulated dowel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410546884.0A CN104308352B (en) | 2014-10-15 | 2014-10-15 | Combined type projection welding insulated dowel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104308352A true CN104308352A (en) | 2015-01-28 |
| CN104308352B CN104308352B (en) | 2016-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410546884.0A Active CN104308352B (en) | 2014-10-15 | 2014-10-15 | Combined type projection welding insulated dowel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104308352B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108672911A (en) * | 2018-08-02 | 2018-10-19 | 浙江爱特新能源汽车有限公司 | A kind of positioning of project-welding nut is welded tooling |
| CN108705243A (en) * | 2018-07-10 | 2018-10-26 | 上汽通用五菱汽车股份有限公司 | Nut welds positioning tool between two parties |
| CN110254565A (en) * | 2019-07-04 | 2019-09-20 | 科大智能机器人技术有限公司 | A kind of hidden fixing device of AGV cage connection |
| CN111843150A (en) * | 2020-08-04 | 2020-10-30 | 桐乡辰宇机械股份有限公司 | Gas joint structure for butt welding, butt welding equipment and butt welding method |
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| JPH05318135A (en) * | 1992-05-16 | 1993-12-03 | Mugai:Kk | Welded bolt and its sealing structure |
| JP2002035948A (en) * | 2000-07-29 | 2002-02-05 | Yoshitaka Aoyama | Supply rod for projection nut |
| JP2010247221A (en) * | 2009-04-13 | 2010-11-04 | Yoshitaka Aoyama | Component detecting electrode |
| CN201645106U (en) * | 2010-03-10 | 2010-11-24 | 浙江吉利汽车有限公司 | Projection welding nut locating device preventing current from dividing |
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| CN204195053U (en) * | 2014-10-15 | 2015-03-11 | 南京理工大学 | Combined type projection welding insulated dowel |
-
2014
- 2014-10-15 CN CN201410546884.0A patent/CN104308352B/en active Active
Patent Citations (7)
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| JPH05318135A (en) * | 1992-05-16 | 1993-12-03 | Mugai:Kk | Welded bolt and its sealing structure |
| JP2002035948A (en) * | 2000-07-29 | 2002-02-05 | Yoshitaka Aoyama | Supply rod for projection nut |
| JP2010247221A (en) * | 2009-04-13 | 2010-11-04 | Yoshitaka Aoyama | Component detecting electrode |
| CN201645106U (en) * | 2010-03-10 | 2010-11-24 | 浙江吉利汽车有限公司 | Projection welding nut locating device preventing current from dividing |
| CN202224834U (en) * | 2011-09-30 | 2012-05-23 | 重庆建设·雅马哈摩托车有限公司 | Nut insulation shrinkage centering projection welding device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108705243A (en) * | 2018-07-10 | 2018-10-26 | 上汽通用五菱汽车股份有限公司 | Nut welds positioning tool between two parties |
| CN108672911A (en) * | 2018-08-02 | 2018-10-19 | 浙江爱特新能源汽车有限公司 | A kind of positioning of project-welding nut is welded tooling |
| CN108672911B (en) * | 2018-08-02 | 2021-06-04 | 浙江爱特新能源汽车有限公司 | Projection welding nut positioning welding tool |
| CN110254565A (en) * | 2019-07-04 | 2019-09-20 | 科大智能机器人技术有限公司 | A kind of hidden fixing device of AGV cage connection |
| CN110254565B (en) * | 2019-07-04 | 2024-03-29 | 科大智能机器人技术有限公司 | Concealed fixing device for AGV shell connection |
| CN111843150A (en) * | 2020-08-04 | 2020-10-30 | 桐乡辰宇机械股份有限公司 | Gas joint structure for butt welding, butt welding equipment and butt welding method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104308352B (en) | 2016-04-20 |
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