KR20170073892A - Spot welding device for weldability test of sheet steel - Google Patents
Spot welding device for weldability test of sheet steel Download PDFInfo
- Publication number
- KR20170073892A KR20170073892A KR1020150182635A KR20150182635A KR20170073892A KR 20170073892 A KR20170073892 A KR 20170073892A KR 1020150182635 A KR1020150182635 A KR 1020150182635A KR 20150182635 A KR20150182635 A KR 20150182635A KR 20170073892 A KR20170073892 A KR 20170073892A
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- KR
- South Korea
- Prior art keywords
- specimen
- spot
- welding
- spot welding
- electrode
- Prior art date
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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
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot 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
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot welding
- B23K11/115—Spot welding by means of two electrodes placed opposite one another on both sides of the welded parts
-
- 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
- B23K11/24—Electric supply or control circuits therefor
-
- 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
- B23K11/24—Electric supply or control circuits therefor
- B23K11/25—Monitoring devices
-
- 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
- B23K11/31—Electrode holders and actuating devices therefor
- B23K11/314—Spot welding guns, e.g. mounted on robots
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Robotics (AREA)
- Resistance Welding (AREA)
Abstract
The point welding apparatus for evaluating the spot weldability of the steel plate specimen includes a spot welder having an upper welding electrode and a lower welding electrode and performing spot welding on the specimen located between the upper welding electrode and the lower welding electrode, A specimen conveyor for moving the specimen in the x- and y-axis directions, and the position of the spot to be spot welded on the specimen can be adjusted to a desired position.
Description
BACKGROUND OF THE
In a variety of mechanical devices having joints connecting a large number of steel plates such as an automobile, the joining means of the joining portion, the joining portion evaluation method, and the physical properties of the joining portion greatly affect the quality of the apparatus.
In the production of finished vehicles, the most commonly used methods for joining metal sheets are mechanical joining using fasteners and spot welding using two or more steel sheets.
The point welding method is the most fundamental and important bonding method for steel makers producing automotive steel plates and automobiles. In this regard, the point welding of the steel plate, that is, the shear strength of the spot weld, the nugget of the welding spot, Size, tensile strength, and electrode life.
The evaluation criteria for spot weldability are standardized by the KS standard, and roughly divided into an allowable range evaluation for determining the allowable current range of the welding, and an electrode life evaluation (two evaluations are referred to as " evaluation " .
The allowable range evaluation can be made by tensile shear test according to KSB0851 specification or by + self tensile test according to KSB0852 specification. The electrode life evaluation can be made according to the KSB ISP 18278-2 standard.
In order to proceed with the evaluation, pre-conditioning is performed so that the welding electrode reaches the stabilization condition before the test.
Preconditioning is performed by performing point welding of a 300-point spot by using a predetermined pressing force on a predetermined thickness and material steel plate specimen, and then performing the evaluation using the electrode.
Conventionally, the specimens were manually spot welded one by one to proceed with the evaluation items such as preconditioning.
Therefore, in particular, a lot of time and cost have been consumed in the pre-conditioning, the working efficiency is lowered and the fatigue of the worker is accumulated. In addition, the specimen could not be stably fixed, which could lead to inaccurate test results. In addition, there is a problem that the safety of the worker is threatened because the worker is continuously positioned near the welding part.
The present invention has been made to solve the above problems of the prior art, and it is an object of the present invention to improve the efficiency of the pre-conditioning and evaluation process in the spot weldability evaluation, to save cost and time, to secure the safety of workers, And to provide a spot welding apparatus capable of improving the strength of the spot welding apparatus.
In order to achieve the above object, according to one aspect of the present invention, there is provided a spot welding apparatus for evaluating spot weldability of a steel plate specimen, the spot welding apparatus including an upper welding electrode and a lower welding electrode, A spot welder for performing spot welding on the specimen, and a specimen conveyer for moving the specimen in the x- and y-axis directions while holding the specimen in a fixed position, and a spot welding device capable of adjusting the position of the spot to be spot- / RTI >
According to one embodiment, while the specimen conveyer moves the specimen, the spot welder performs continuous spot welding, and the number of the total spot spots of the spot welding to be continuously performed can be set.
According to one embodiment, the specimen is moved such that a plurality of spot points of spot welding are formed in rows and columns.
According to an embodiment, it is possible to set the number of RBs or the number of RBs constituting the row.
According to one embodiment, the distance between the points of the spot welding can be set.
According to one embodiment, the specimen conveyor includes a fixing member in the form of a forceps for holding and fixing one end of the specimen.
According to one embodiment, the fixing member fixes the specimen so that the other end of the specimen facing one end of the specimen fixed to the fixing member is arranged to face the spot welder.
1 is a perspective view of a spot welding apparatus according to an embodiment of the present invention.
Fig. 2 shows the positions of the upper and lower electrodes with respect to the specimen in the spot welding apparatus of Fig. 1. Fig.
Figure 3 shows a specimen conveyor of the spot welding apparatus of Figure 1;
Fig. 4 is a side view of the support of the spot welding apparatus of Fig. 1;
Fig. 5 shows a specimen in which spot welding is performed by the spot welding apparatus of Fig. 1. Fig.
Figure 6 shows a display of the control input of the sample feeder.
Figures 7 and 8 illustrate auxiliary supports for dot welding performance on cross-shaped specimens.
BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.
The shapes, sizes, ratios, angles, numbers, and the like disclosed in the drawings for describing the embodiments of the present invention are illustrative, and thus the present invention is not limited thereto. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Where the terms "comprises", "having", "done", and the like are used in this specification, other portions may be added unless "only" is used. Unless the context clearly dictates otherwise, including the plural unless the context clearly dictates otherwise.
In interpreting the constituent elements, it is construed to include the error range even if there is no separate description.
In the case of a description of the positional relationship, for example, if the positional relationship between two parts is described as 'on', 'on top', 'under', and 'next to' Or " direct " is not used, one or more other portions may be located between the two portions.
It is to be understood that elements or layers are referred to as being "on " other elements or layers, including both intervening layers or other elements directly on or in between. Like reference numerals refer to like elements throughout the specification.
Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of the present invention.
The sizes and thicknesses of the individual components shown in the figures are shown for convenience of explanation and the present invention is not necessarily limited to the size and thickness of the components shown.
It is to be understood that each of the features of the various embodiments of the present invention may be combined or combined with each other partially or entirely and technically various interlocking and driving is possible as will be appreciated by those skilled in the art, It may be possible to cooperate with each other in association.
1 is a perspective view of a
1, the
The
The
The upper
Although not shown in detail in FIG. 1, a lower
Fig. 2 shows the positions of the upper and lower electrodes with respect to the
As shown in FIG. 2, the
In this specification, the
According to the present embodiment, the position of the lower
When the upper
During continuous spot welding, the upper
1, the
The welding principle and operation of the spot welder for performing spot welding by bringing the two electrodes into contact with the steel sheet are well known and will not be described in detail here.
3 shows the specimen conveyor 10 of the
As shown in FIG. 3, the specimen conveyor 10 includes a box-shaped
The
The
The movable supporting part 120 includes a supporting
In this specification, the x-axis and the y-axis are defined as axes parallel to the plane of the drawing and perpendicular to each other.
The moving
The y-
According to this configuration, the
The
According to this configuration, the action of the cylinder of the second pneumatic cylinder causes the
In short, the
Therefore, according to the present embodiment, the first pneumatic cylinder and the second pneumatic cylinder are independently controlled, and the specimen can be freely moved in the x-axis and y-axis directions.
4 shows the
As shown in FIG. 4, the
The fixing
When the fixing
As shown in Fig. 4, the fixing
The other end of the
According to the present embodiment, it is possible to freely select and fix the
In addition, since the free end of the
It is also possible to separate or install the
Fig. 5 shows a
The
The continuous spot welding operation is performed by vertically moving the
Fig. 5 shows a
As shown in Fig. 5, the
According to this embodiment, in automatic continuous welding mode, the first spot weld made by spaced apart by a first spot (S 1) is completed, a predetermined in the test piece along the x axis (FIG left direction in Fig. 5) the distance (P x) And the next welding is performed at the position.
According to this embodiment, it is possible to arbitrarily set the number of spot spots S which are continuously performed from start to stop at one time. Also, the number n of rows to be routed and the number m of rows can be arbitrarily set.
Continuous welding is performed while moving the specimen in the x-axis direction. When the last spot (S n ) of one row is made by the number of the set number of rows, the
At this time, according to the setting, the welding of two rows may be performed in the direction opposite to the one row starting from the last spot (S n ) of one row and the spot position (S 3 ) immediately adjacent to the specimen by moving the specimen only in the y- In the x-axis and y-axis directions so as to start in the same direction as one row, starting from the first spot (S 1 ) of the first row and the second spot position (S 2 ) immediately adjacent thereto.
At this time, a distance between the distance (pitch) (P x ) between the row points in the row direction and a distance (P y ) between the column direction row points can also be arbitrarily set.
This process is repeated, and when the continuous spot welding is performed for a predetermined number of RBs, the welding process is terminated.
The condition determination of the continuous point welding is performed according to the input of the user through the
6 shows the display 151 (see Fig. 1) of the
As shown in FIG. 6, the
In addition, the number of RBs can be arbitrarily set through the RB number designation window 152. [ For example, the number displayed on the window 152 may be increased or decreased by using the
Similarly, in the
In addition to the above items, the
It will be appreciated that the configuration of the
On the other hand, the
The
When the other spot
Such an adjustment operation of the target position can be usefully used, for example, in the evaluation of electrode life.
According to the standard, 200 (or 100 or 50) RBs are applied to one specimen (100 RBs for 400-600 welds and 50 RBs for less than 400 welds) for one specimen, And the electrode life is evaluated through evaluation of the separate specimen by performing spot welding.
Referring again to FIG. 5, for example, if the
According to the present embodiment, as shown in FIG. 5, when a new continuous spot welding process is started, the initial spot position S 1 'can be designated by moving the test piece to the existing spot position. Therefore, the continuous spot welding process is started from the initial spot position S 1 'to the portion of the
Accordingly, it is possible to prevent the
As described above, in the
When these characteristics and the characteristics capable of arbitrarily designating the initial spot position S 1 'are combined when a new continuous spot welding process is started, the residual space not welded is found in the
The saving aspect of the evaluation specimen can be further maximized depending on the number of RBs, the distance between RBs, and the number of rows and columns.
On the other hand, for example, spot welding for a separate specimen in the electrode life evaluation is performed for a cruciform specimen 2 'in which two steel plates 3' and 4 'are arranged in a cross as shown in Fig. To this end, an
Figs. 7 and 8 illustrate auxiliary supports for point welding of the cross-shaped specimen 2 '.
An
A
The
The auxiliary supporting
According to the
In addition, compatibility with various specimens having different sizes is very excellent, and the number of turns of the spot welding, the spacing and the like can be freely adjusted, so that it is possible to flexibly cope with the standard change in the evaluation of the spot weldability.
In addition, a remarkable saving of the evaluation material can be achieved through the arbitrary setting of the RB position, thereby reducing the cost.
Claims (7)
A spot welder having an upper welding electrode and a lower welding electrode to perform spot welding on the specimen located between the upper welding electrode and the lower welding electrode;
And a specimen conveyor for moving the specimen in the x-axis and y-axis directions by fixing and supporting the specimen,
Wherein the spot welding position to be spot welded in the specimen can be adjusted to a desired position.
Wherein the specimen conveyor moves the specimen while the spot welder performs continuous spot welding,
And the number of total rub points of the point welding to be continuously performed can be set.
And moving the specimen so that a plurality of spot points of spot welding are formed in rows and columns.
And the number of the other points constituting the row or the number of the other points constituting the column can be set.
And the distance between the point of the spot welding can be set.
The specimen conveyor comprises:
And a fixing member in the form of a forceps for holding and fixing one end of the specimen.
And the other end of the specimen facing the one end of the specimen fixed to the fixing member is disposed so as to face the spot welder.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020150182635A KR20170073892A (en) | 2015-12-21 | 2015-12-21 | Spot welding device for weldability test of sheet steel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020150182635A KR20170073892A (en) | 2015-12-21 | 2015-12-21 | Spot welding device for weldability test of sheet steel |
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KR20170073892A true KR20170073892A (en) | 2017-06-29 |
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KR1020150182635A KR20170073892A (en) | 2015-12-21 | 2015-12-21 | Spot welding device for weldability test of sheet steel |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109623119A (en) * | 2019-01-09 | 2019-04-16 | 湖南福德电气有限公司 | Resistance band spot welding auxiliary device |
-
2015
- 2015-12-21 KR KR1020150182635A patent/KR20170073892A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109623119A (en) * | 2019-01-09 | 2019-04-16 | 湖南福德电气有限公司 | Resistance band spot welding auxiliary device |
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