KR20170053378A - Rotary projection welding nut - Google Patents
Rotary projection welding nut Download PDFInfo
- Publication number
- KR20170053378A KR20170053378A KR1020150155816A KR20150155816A KR20170053378A KR 20170053378 A KR20170053378 A KR 20170053378A KR 1020150155816 A KR1020150155816 A KR 1020150155816A KR 20150155816 A KR20150155816 A KR 20150155816A KR 20170053378 A KR20170053378 A KR 20170053378A
- Authority
- KR
- South Korea
- Prior art keywords
- coating layer
- base material
- projection
- projection welding
- welding
- Prior art date
Links
- 238000003466 welding Methods 0.000 title claims abstract description 34
- 239000011247 coating layer Substances 0.000 claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 239000010410 layer Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 description 3
- 229910018125 Al-Si Inorganic materials 0.000 description 2
- 229910018520 Al—Si Inorganic materials 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
- F16B37/04—Devices for fastening nuts to surfaces, e.g. sheets, plates
- F16B37/06—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting
- F16B37/061—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting by means of 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/14—Projection welding
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
A projection welding nut according to any one of claims 1 to 3, wherein the through hole is formed in a central portion of the through hole, and the through hole has a threaded portion formed on a side surface thereof. And a plurality of protrusions spaced from each other around the bottom surface of the body and contacting the steel member layer under the coating layer while stripping the coating layer.
Description
The present invention relates to a nut for rotary projection welding in which welding is improved by contacting a base material with a steel member layer by peeling a coating layer of the base material while rotating due to a shape of a protrusion formed in a lower part in a process of welding the nut to the base material.
Generally, in the case of projection welding, when the current flows under the pressure applied by the electrode part, resistance heat is generated in the projection, and the welding method in which the welding with the base material occurs due to the heat. However, in the case of a base material in which a coating layer is formed, particularly, a base material such as hot stamping steel in which a coating layer is formed by Al-Si plating, the weldability is drastically deteriorated due to such ultra high strength coating layer. As a result, welding failure of the nut occurred.
In order to overcome the deterioration of the weldability during the projection welding work on the base material such as the hot stamping steel in the related art, the welding time is increased or the amount of current is increased.
It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as an admission that the prior art is known to those skilled in the art.
The present invention provides a nut for a rotary projection welding in which welding is improved by contacting a base material with a steel member layer by peeling off a coating layer of the base material while rotating due to the shape of a protrusion formed in a lower part in a process of welding the nut to the base material .
According to an aspect of the present invention, there is provided a rotary projection welding nut according to the present invention, which is a projection welding nut that is welded to a base material on which a coating layer is formed by resistance heat generated from an electrode portion, A body formed with a thread on the side surface in the through hole; And a plurality of protrusions spaced from each other around the bottom surface of the body and contacting the steel member layer under the coating layer while peeling off the coating layer.
The protrusions are formed along the circumference of the lower surface of the body and have a predetermined thickness; And a lower blade portion that gradually becomes thinner along the predetermined direction and extends downward and the lowermost portion is in contact with the base material.
The plurality of protrusions may be formed so as to be inclined toward the outside with reference to an imaginary line extending vertically downward from the body.
The angle formed by the line formed by the lower surface of the body and the line formed by the portion extending to the lowermost portion of the projection may be in the range of 30 to 120 degrees.
The blade portion may be inclined so as to be bent in a direction in which the thickness becomes thinner.
A concavo-convex structure having a shape corresponding to the electrode portion may be formed on the upper surface of the body.
According to the nuts for rotary projection welding of the present invention as described above, since the projections have a structure in which the coating layer of the base material can be easily peeled off by rotation, the welding material can be easily welded to the base material, The effect can be expected.
As a result, the time required for the welding operation is reduced, and as a result, productivity is improved due to shortening of the process time.
BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a view of a rotary projection welding nut according to an embodiment of the present invention.
2 is a view showing a protrusion and a base material according to an embodiment of the present invention.
3 is a side view of a rotary projection welding nut according to an embodiment of the present invention.
4 is a view of a projection viewed from the bottom according to an embodiment of the present invention.
5 is a side view of a projection according to an embodiment of the present invention.
6 is a view illustrating a concavo-convex structure formed in a body according to an embodiment of the present invention.
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
The rotary projection welding nut according to the present invention is a projection welding nut which is welded to a
The
A
Generally, in the case of projection welding, a resistance heat is generated in the
In order to overcome the deterioration of the weldability, the
The technical idea of the present invention is to remove the
In the rotary projection welding nut according to the present invention, the
The
The
The
In the rotary projection welding nut according to the present invention, the plurality of
The
Preferably, the angle formed between the
The angle formed by the line formed by the lower surface of the
If the angle is less than 30 degrees, the
For this reason, the angle formed by the line formed by the lower surface of the
The length extending from the nut for rotary projection welding according to the present invention to the lowermost portion of the
If the length of the
In the rotary projection welding nut according to the present invention, the
The
In the rotary projection welding nut according to the present invention, the concave and
The concavo-
Even if the
While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims It will be apparent to those of ordinary skill in the art.
10: Base material 11: Coating layer
12: steel member layer 30: electrode part
100: Body 110: Through hole
120: concave and convex structure 200: projection
210: fixing part 220: blade part
Claims (6)
A through hole having an upper portion and a lower portion communicated with each other at a central portion thereof; And
And a plurality of protrusions spaced from each other around the bottom surface of the body and contacting the steel member layer under the coating layer while peeling off the coating layer.
The projection,
An upper fixing part formed along the periphery of the lower surface of the body and having a predetermined thickness; And
And a lower blade portion which is gradually thinned along a predetermined direction and extends downward to contact the lowermost portion with the base material.
Wherein the plurality of projections are formed so as to be inclined outward with respect to an imaginary line extending vertically downward from the body.
Wherein an angle formed by a line formed by the lower surface of the body and a line formed by the portion extending to the lowermost portion of the projection with respect to the side surface of the body is in the range of 30 to 120 degrees.
Wherein the blade portion is inclined so as to be bent in a direction in which the thickness thereof is thinned.
And a concavo-convex structure having a shape corresponding to the electrode portion is formed on the upper surface of the body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020150155816A KR20170053378A (en) | 2015-11-06 | 2015-11-06 | Rotary projection welding nut |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020150155816A KR20170053378A (en) | 2015-11-06 | 2015-11-06 | Rotary projection welding nut |
Publications (1)
Publication Number | Publication Date |
---|---|
KR20170053378A true KR20170053378A (en) | 2017-05-16 |
Family
ID=59035143
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020150155816A KR20170053378A (en) | 2015-11-06 | 2015-11-06 | Rotary projection welding nut |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR20170053378A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111673252A (en) * | 2020-05-11 | 2020-09-18 | 首钢集团有限公司 | Projection welding method of nut |
CN111889866A (en) * | 2020-06-19 | 2020-11-06 | 西安石油大学 | Friction hot riveting threaded nail and welding process |
-
2015
- 2015-11-06 KR KR1020150155816A patent/KR20170053378A/en not_active Application Discontinuation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111673252A (en) * | 2020-05-11 | 2020-09-18 | 首钢集团有限公司 | Projection welding method of nut |
CN111889866A (en) * | 2020-06-19 | 2020-11-06 | 西安石油大学 | Friction hot riveting threaded nail and welding process |
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Legal Events
Date | Code | Title | Description |
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A201 | Request for examination | ||
E601 | Decision to refuse application |