CN204195053U - Combined type projection welding insulated dowel - Google Patents
Combined type projection welding insulated dowel Download PDFInfo
- Publication number
- CN204195053U CN204195053U CN201420597387.9U CN201420597387U CN204195053U CN 204195053 U CN204195053 U CN 204195053U CN 201420597387 U CN201420597387 U CN 201420597387U CN 204195053 U CN204195053 U CN 204195053U
- Authority
- CN
- China
- Prior art keywords
- nut
- elongated cylinder
- lead
- dowel
- combined type
- 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.)
- Withdrawn - After Issue
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Abstract
The utility model discloses 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 utility model long service life, registration, and with low cost.
Description
Technical field
The utility model 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.
Utility model content
The purpose of this utility model 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 utility model object 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 utility model compared with prior art, its remarkable advantage:
(1) positioning boss of the present utility model 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 utility model 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 utility model 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 utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model combined type projection welding insulated dowel positioning boss.
Fig. 2 is the structural representation of the utility model combined type projection welding insulated dowel alignment pin pedestal.
Fig. 3 is the general structure schematic diagram of the utility model combined type projection welding insulated dowel.
Detailed description of the invention
Composition graphs 1 ~ Fig. 3:
A kind of combined type projection welding of the utility model 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.
The utility model structure 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 |
|---|---|---|---|
| CN201420597387.9U CN204195053U (en) | 2014-10-15 | 2014-10-15 | Combined type projection welding insulated dowel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420597387.9U CN204195053U (en) | 2014-10-15 | 2014-10-15 | Combined type projection welding insulated dowel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204195053U true CN204195053U (en) | 2015-03-11 |
Family
ID=52653052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420597387.9U Withdrawn - After Issue CN204195053U (en) | 2014-10-15 | 2014-10-15 | Combined type projection welding insulated dowel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204195053U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104308352A (en) * | 2014-10-15 | 2015-01-28 | 南京理工大学 | Combined projection welding insulated dowel |
| CN108488361A (en) * | 2018-04-02 | 2018-09-04 | 广西玉柴机器股份有限公司 | Gear shaft |
| CN111250852A (en) * | 2020-01-21 | 2020-06-09 | 江铃汽车股份有限公司 | Projection welding insulation positioning pin and manufacturing device and method thereof |
-
2014
- 2014-10-15 CN CN201420597387.9U patent/CN204195053U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104308352A (en) * | 2014-10-15 | 2015-01-28 | 南京理工大学 | Combined projection welding insulated dowel |
| CN108488361A (en) * | 2018-04-02 | 2018-09-04 | 广西玉柴机器股份有限公司 | Gear shaft |
| CN108488361B (en) * | 2018-04-02 | 2024-03-12 | 广西玉柴机器股份有限公司 | Gear shaft |
| CN111250852A (en) * | 2020-01-21 | 2020-06-09 | 江铃汽车股份有限公司 | Projection welding insulation positioning pin and manufacturing device and method thereof |
| CN111250852B (en) * | 2020-01-21 | 2021-11-16 | 江铃汽车股份有限公司 | Projection welding insulation positioning pin and manufacturing device and method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150311 Effective date of abandoning: 20160420 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |