CN104607790A - Electrode force detection device and spot welding machine head provided with same - Google Patents
Electrode force detection device and spot welding machine head provided with same Download PDFInfo
- Publication number
- CN104607790A CN104607790A CN201510033923.1A CN201510033923A CN104607790A CN 104607790 A CN104607790 A CN 104607790A CN 201510033923 A CN201510033923 A CN 201510033923A CN 104607790 A CN104607790 A CN 104607790A
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- China
- Prior art keywords
- electrode
- welding head
- pressure sensitive
- electrode force
- spot welding
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Classifications
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- 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
- B23K11/252—Monitoring devices using digital means
- B23K11/255—Monitoring devices using digital means the measured parameter being a force
-
- 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
- B23K11/30—Features relating to electrodes
- B23K11/31—Electrode holders and actuating devices therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Resistance Welding (AREA)
Abstract
The invention discloses an electrode force detection device targeting a traditional method used for detecting electrode force through an electronic scale. The electrode force detection device comprises a pressure induction block, a pressure bar and a pressure induction display circuit. The fixed end of the pressure induction block is mounted at the lower end of a connecting shaft of a welding head clamp of a spot welding machine head. The pressure bar is mounted at the force measuring end of the pressure induction block. The pressure induction block is electrically connected with the pressure induction display circuit and an electrode force presetting circuit. On this basis, the invention further provides the spot welding machine head provided with the electrode force detection device. According to the spot welding machine head, the welding head clamp is mounted at the force measuring end of the pressure induction block, the pressure induction display circuit is mounted on the spot welding machine head or a spot welding machine, and an electrode welding head mounted on the welding head clamp serves as the pressure bar at the same time, so that the electrode force detection device and the spot welding machine head form an integrated structure, and the technical problem that the electrode force during a welding period can not be detected in real time for a long time in the electric resistance welding field is solved.
Description
Technical field
The present invention relates to electric resistance welding field, more particularly, the present invention relates to the detection of electric resistance welding spot welding to electrode force.
Background technology
In order to maintain electrode force in the electric resistance welding spot welding period, spot welding head there is the presetting structure of electrode force, general by the presetting electrode force of Compress Spring, when electrode force reaches pre-set value, provide the source of welding current by the electrode force presetting circuit trigger host of the presetting structure of electrode force.In order to ensure uniformity and the stability of welding, particularly when welding fine workpiece, spot welding head must detect and correct the regulation and control of electrode force.
The method of detection and check point welding head electrode force in prior art, electronic scale is all utilized to realize as follows: first, get one is placed in welding head holder lower end compared with the electronic scale of book, then pressure bar is arranged on welding head holder, added by pressure bar and be pressed on the pressure sensitive block of electronic scale, draw the reading of electrode force.Visible, with the detection method of prior art, if electronic scale is not placed in the position of welding head holder lower end weldment, so detect and correct and just cannot carry out.
In addition, Real-Time Monitoring cannot be carried out to the electrode force of spot welding period in electric resistance welding field always, brings to the forming core analyzing and study spot welding and perplexs greatly.
In view of this, necessary provide a kind of not by weldment position influence electrode force checkout gear and a kind ofly can carry out the spot welding head of Real-Time Monitoring to welding period electrode force.
Summary of the invention
The object of the invention is to: one is to provide a kind of electrode force checkout gear not being subject to weldment position influence, and two is on the basis of electrode force checkout gear, provides a kind of spot welding head that can detect welding period electrode force in real time.
In order to realize above-mentioned first goal of the invention, the invention provides a kind of electrode force checkout gear, it comprises pressure sensitive block, pressure bar and pressure sensitive display circuit; Described pressure sensitive block comprises stiff end and dynamometry end, and its stiff end is installed on the welding head holder connecting axle lower end of spot welding head; Described pressure bar is arranged on the dynamometry end of pressure sensitive block, and described pressure sensitive display circuit and pressure sensitive block are electrically connected.
One as electrode force checkout gear of the present invention is improved, and described pressure sensitive display circuit is also electrically connected with the electrode force presetting circuit of the presetting structure of the electrode force on spot welding head.
Compared with the prior art of placing electronic scale detecting electrode power with needs below welding head holder, electrode force checkout gear of the present invention is arranged on the stiff end of pressure sensitive block on the welding head holder connecting axle of spot welding machine head, pressure bar is arranged on the dynamometry end of pressure sensitive block, pressure sensitive display circuit is electrically connected with pressure sensitive block and electrode force presetting circuit simultaneously, like this, just be equivalent to top electronic scale being suspended on weldment, do not affect and more accurate technological progress by weldment locus so electrode force checkout gear of the present invention has.
In order to realize above-mentioned second object, present invention also offers a kind of spot welding head of belt electrode force checking device, comprising electrode force checkout gear, spot welding head and welding head holder; Described spot welding head comprises machine head frame, the presetting structure of the electrode force be arranged in machine head frame and welding head holder connecting axle; Described electrode force checkout gear comprises pressure sensitive block and pressure sensitive display circuit, and wherein, pressure sensitive block comprises stiff end and dynamometry end, and its stiff end is arranged on welding head holder connecting axle; Welding head holder is arranged on the dynamometry end of pressure sensitive block, and pressure sensitive block and pressure sensitive display circuit are electrically connected.
One as the spot welding head of belt electrode force checking device of the present invention is improved, and the presetting structure of described electrode force has electrode force presetting circuit, and electrode force presetting circuit and pressure sensitive display circuit are electrically connected.
One as the spot welding head of belt electrode force checking device of the present invention is improved, and described welding head holder comprises fixed electrode fixture block and float electrode fixture block two electrode fixture blocks; Fixed electrode fixture block is fastened on the dynamometry end of pressure sensitive block, and float electrode fixture block connects and composes welding head holder by tightness adjustment structure and fixed electrode fixture block.
One as the spot welding head of belt electrode force checking device of the present invention is improved, the lower end of two electrode fixture blocks of described welding head holder is provided with the electrode interface of installing electrodes soldering tip, and the upper end of two electrode fixture blocks is provided with the screw be connected with spot welding power output cable.
One as the spot welding head of belt electrode force checking device of the present invention is improved, and described tightness adjustment structure comprises insulation bearing pin, adjusting screw(rod), insulation spacer and Compress Spring; Float electrode fixture block is connected to the side of fixed electrode fixture block by insulation bearing pin slidably; The end of adjusting screw(rod) is tightened in the corresponding screw of fixed electrode fixture block through after float electrode fixture block, be interposed between insulation spacer and make the two keep insulating between adjusting screw(rod) and float electrode fixture block, Compress Spring provides the motive force away from fixed electrode fixture block for float electrode fixture block.
One as the spot welding head of belt electrode force checking device of the present invention is improved, and described welding head holder is provided with welding head of electrode, and welding head of electrode plays the effect that electrode force checkout gear pressure bar transmits electrode force simultaneously.
Compared with prior art, the present invention is on the basis of electrode force checkout gear, a kind of spot welding head of belt electrode force checking device is provided, its welding head holder is arranged on the dynamometry end of pressure sensitive block, pressure sensitive display circuit is arranged on spot welding head or mash welder, pressure sensitive display circuit and pressure sensitive block and electrode force presetting circuit are electrically connected, the welding head of electrode that welding head holder is installed is again pressure bar simultaneously, electrode force checkout gear and spot welding head is made to become integral structure, the invention solves electric resistance welding field cannot carry out detection in real time for a long time technical barrier to the electrode force of welding period.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the spot welding head of electrode force checkout gear of the present invention, belt electrode force checking device and Advantageous Effects thereof are described in detail.
Fig. 1 is the structural representation of electrode force checkout gear of the present invention.
Fig. 2 is the structural representation that electrode force checkout gear of the present invention is arranged on spot welding head.
Fig. 3 is the structural representation of the spot welding head of belt electrode force checking device of the present invention.
Fig. 4 is the structural representation of the welding head holder being arranged on pressure sensitive block dynamometry end in Fig. 3.
Detailed description of the invention
In order to make object of the present invention, technical scheme and Advantageous Effects thereof more clear, below in conjunction with the drawings and specific embodiments, the present invention is further elaborated.Should be understood that, the detailed description of the invention described in this description is only used to explain the present invention, is not intended to limit the present invention.
Need explanation, the said pressure sensor of industry comprises pressure sensitive block and pressure sensitive display circuit, pressure sensitive block the most frequently used is at present the pressure sensitive block in band deformation chamber, and pressure sensitive block and being made of one of pressure sensitive display circuit structure then can be referred to as electronic scale.
The present invention includes spot welding head two partial content of electrode force checkout gear and belt electrode force checking device.Before introducing this two partial content, first the structure understanding spot welding head is needed, mash welder head generally comprises machine head frame, machine head frame is provided with weld force conducting structure, the presetting structure of electrode force, weld force conducting structure includes welding head holder connecting axle, its lower end is in order to install welding head holder, welding head of electrode is arranged on welding head holder, the presetting structure of electrode force includes electrode force presetting circuit, when the electrode force on welding head of electrode reaches the moment of pre-set value, the source of welding current is connected, for welding head of electrode provides welding current by electrode force presetting circuit.
First electrode force checkout gear is introduced below.Refer to Fig. 1 and Fig. 2, electrode force checkout gear of the present invention comprises pressure sensitive block 101, pressure bar 102 and pressure sensitive display circuit 103.Wherein, the two ends of pressure sensitive block 101 are respectively stiff end 104 and dynamometry end 105; Stiff end 104 is provided with mounting interface 111, and pressure sensitive block 101 can be arranged on the lower end of the welding head holder connecting axle 107 of spot welding head 106 by mounting interface 111.Pressure bar 102 is columniform spill, and it is arranged on the dynamometry end 105 of pressure sensitive block 101, in order to force transmission to pressure sensitive block 101.Pressure sensitive display circuit 103 is electrically connected by power line 108 and pressure sensitive block 101, is also electrically connected by power line 110 and the spot welding machine head electrode force presetting circuit 109 of doing one's utmost presetting structure that powers on.
It should be noted that, the stiff end 104 of pressure sensitive block 101 by the connection of mounting interface 111 and welding head holder connecting axle 107 for being easy to the connection of installing and removing, the electrical connection of electrode force presetting circuit 109 and pressure sensitive display circuit 103 is also for the connector being easy to install and remove is connected, and dynamometry end 105 and the connection of pressure bar 102 of pressure sensitive block 101 are then be convenient to pressurize the connection highly regulated to pressure bar 102.
Electrode force checkout gear of the present invention is arranged on method on spot welding head and operation principle as follows: first unload original welding head holder, the stiff end 104 of pressure sensitive block 101 is arranged on the welding head holder connecting axle 107 of spot welding head, the dynamometry end 105 of pressure sensitive block 101 installs pressure bar 102; Then, spot welding head is adjusted to duty, and on spot welding head presetting electrode force, by the weld force conducting structure of spot welding head, pressure bar 102 is pressurizeed thereupon, when the electrode force pressurizeed reaches pre-set value, because pressure sensitive display circuit 103 and electrode force presetting circuit 109 are electrically connected, so time the electrode force that detects of pressure sensor i.e. presetting electrode force.Due to the accuracy of pressure sensor, therefore can in order to detect and to correct presetting electrode force.
It should be noted that, prior art detects electrode force and corrects is all below electronic scale being placed in welding head holder, after pressure bar is arranged on welding head holder, the pressure sensitive block of electronic scale is pressurizeed, when hearing that presetting electrode force circuit sends the pressure reading of the moment reading electronic scale of the tucket triggering the source of welding current.Obviously, the detection method of prior art electrode force, one is the space and the position that are limited by weldment below welding head holder, if this position is not enough to place electronic scale, detects and also just cannot carry out; Two is that inevitably free error, is difficult to guarantee accurately consistent when hearing that presetting electrode force circuit sends the pressure reading that the tucket triggering the source of welding current reads electronic scale again.By contrast, the present invention is directly installed on pressure sensitive block on welding head holder connecting axle, adding with pressure bar is pressed in weldment or work stage, when plus-pressure reaches presetting electrode force, because pressure sensitive display circuit and electrode force presetting circuit are electrically connected, the instantaneous electrode force of pressure sensitive display circuit display is exactly presetting electrode force, very directly, accurately, completely avoid the error that time difference and other factors cause.Moreover, due to pressure sensitive block is arranged on welding head holder connecting axle, be equivalent to top electronic scale being suspended on weldment, so electrode force checkout gear of the present invention is not completely by the impact of weldment position.
Below the spot welding head of belt electrode force checking device of the present invention is then introduced.
Refer to Fig. 3, the spot welding head of belt electrode force checking device of the present invention comprises spot welding head, electrode force checkout gear, welding head holder 303 and welding head of electrode 304.
Spot welding head comprises machine head frame 301, head column 302 and is arranged on weld force conducting structure and the presetting structure of electrode force of machine head frame 301; Weld force conducting structure there is welding head holder connecting axle 107A, the presetting structure of electrode force has electrode force presetting circuit 109A.
Electrode force checkout gear comprises pressure sensitive block 101A and pressure sensitive display circuit (not shown).The stiff end 104A of pressure sensitive block 101A is arranged on the lower end of welding head holder connecting axle 107A, and welding head holder 303 is arranged on the dynamometry end 105A of pressure sensitive block 101A.Pressure sensitive display circuit is arranged on spot welding head or is arranged on mash welder.Pressure sensitive display circuit except being electrically connected with pressure sensitive block 101A, also and the electrode force presetting circuit 109A of spot welding head be electrically connected.Like this, electrode force checkout gear just and mash welder head together form the spot welding head of belt electrode force checking device of the present invention.
Welding head holder 303 can installing electrodes soldering tip 304, also can setting pressure rod; Welding head of electrode 304, except doing welding job, is also delivered to pressure sensitive block 101A electrode force simultaneously, plays the effect identical with pressure bar.
Refer to Fig. 4, welding head holder 303 comprises fixed electrode fixture block 401 and float electrode fixture block 402 2 electrode fixture blocks.During installation, by screw 403, fixed electrode fixture block 401 is vertically mounted on the front end face of the dynamometry end 105A of pressure sensitive block 101A, then by tightness adjustment structure, float electrode fixture block 402 is connected side by side with fixed electrode fixture block 401.
Two longitudinal blocks of substantially identical sized by two electrode fixture blocks 401,402, shape almost symmetry, their upper end is respectively arranged with the screw 404,405 for being connected with spot welding power two output cables, lower end then offers longitudinal semi-cylindrical accepting groove relative to one another, forms the electrode interface 407 for installing columniform soldering tip 406 after two semi-cylindrical accepting groove docking.In order to save space to avoid blocking sight line, two electrode fixture blocks 401,402 of welding head holder have excised the redundance of lower end outside respectively, and the shape making whole welding head holder 303 is inverted "convex" shape.
Float electrode fixture block 402 realizes the connection with fixed electrode fixture block 401 by tightness adjustment structure, and the smooth-going folding in the left and right realizing welding head holder 303, ensure the perpendicularity that cylindrical soldering tip 406 is installed simultaneously.Described tightness adjustment structure comprises insulation spacer 408, insulation bearing pin 409, adjusting screw(rod) 410 and Compress Spring 411, and its syndeton and mode of operation are: float electrode fixture block 402 is connected to the side of fixed electrode fixture block 401 by insulation bearing pin 409 slidably; By one end of adjusting screw(rod) 410 through float electrode fixture block 402, then be screwed in the corresponding screw of fixed electrode fixture block 401, adjusting screw(rod) 410 is for locking the cylindrical soldering tip 406 be arranged between two electrode fixture blocks 401,402, and insulation spacer 408 and Compress Spring 411 are arranged between two electrode fixture blocks 401,402; Wherein, be interposed between and make the two keep insulation between fixed electrode fixture block 401 and float electrode fixture block 402 between insulation spacer 408, Compress Spring 411 provides the motive force away from fixed electrode fixture block 401 for float electrode fixture block 402; The head of adjusting screw(rod) 410 is provided with handwheel.The welding head holder 303 connected into by tightness adjustment structure, make electrode interface 407 can the columniform welding head of electrode 406 of firm grip, and can ensure that two electrode fixture blocks 401,402 realize electrical connection reliably at electrode interface 407 place, other parts then keep insulation.
Understandablely be, the electrode interface 407 that float electrode fixture block 402 and fixed electrode fixture block 401 lower end are arranged is except can installing cylindrical parallel welding head of electrode, after the connection of removing a wherein output cable, can also be used for columniform single electrode soldering tip is installed, the pressure bar of same size can also be installed equally.
Below the course of work of the spot welding head of belt electrode force checking device and principle are described: first, welding head of electrode is arranged on welding head holder, spot welding head has pre-seted electrode force; By weld force conducting structure, welding head of electrode is pressurizeed subsequently, when adding mash welder output current when the electrode force be pressed on welding head of electrode reaches pre-set value, because pressure sensitive display circuit is connected with electrode force presetting circuit, by the transmission of welding head of electrode to electrode force, pressure sensor can demonstrate its electrode force detected immediately.
It should be noted that, welding head holder is directly installed on the dynamometry end of pressure sensitive block, the deadweight of welding head holder and be arranged on the deadweight etc. of output cable on welding head holder, can by pressure sensitive display circuit with the technical finesse of " zero ".That is, dynamometry end welding head holder being directly installed on pressure sensitive block is equivalent to directly install pressure sensor on soldering tip, in the welding period, pressure sensitive block is except the electrode force that soldering tip is real-time being detected, do not have and not by the interference of other any external force, the electrode force that the spot welding head of belt electrode force checking device detects is exactly and can only is the real-time electrode force of welding period.
Also it should be noted that, electric resistance welding pinpoint welding procedure have nucleated time extremely short, be in that closed state cannot be observed, the feature such as feature signal extraction difficulty, therefore cannot carry out Real-Time Monitoring to the electrode force change of the forming core that is crushed after the first expanded by heating of spot welding period soldering tip for a long time, can only indirectly infer.The spot welding head of belt electrode force checking device of the present invention solves the technical barrier that electric resistance welding field cannot detect real-time electrode force for a long time.
In addition, although prior art has the structure of setting pressure sensor block in the machine head frame of spot welding head, but due to pressure sensitive block is arranged in machine head frame, its electrode force detected at least comprises the frictional force during motion of welding head holder connecting axle, so the electrode force detected with pressure sensor in machine head frame is not identical with the electrode force that the present invention detects, it not true electrode force.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also carry out suitable change and amendment to above-mentioned embodiment.Therefore, the present invention is not limited to detailed description of the invention disclosed and described above, also should fall in the protection domain of claim of the present invention modifications and changes more of the present invention.In addition, although employ some specific terms in this description, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (8)
1. an electrode force checkout gear, is characterized in that: comprise pressure sensitive block, pressure bar and pressure sensitive display circuit; Described pressure sensitive block comprises stiff end and dynamometry end, and its stiff end is installed on the welding head holder connecting axle lower end of spot welding head; Described pressure bar is arranged on the dynamometry end of pressure sensitive block, and described pressure sensitive display circuit and pressure sensitive block are electrically connected.
2. electrode force checkout gear according to claim 1, is characterized in that: described pressure sensitive display circuit is also electrically connected with the electrode force presetting circuit of the presetting structure of the electrode force on spot welding head.
3. a spot welding head for belt electrode force checking device, is characterized in that: comprise electrode force checkout gear, spot welding head and welding head holder; Described spot welding head comprises machine head frame, the presetting structure of the electrode force be arranged in machine head frame and welding head holder connecting axle; Described electrode force checkout gear comprises pressure sensitive block and pressure sensitive display circuit, and wherein, pressure sensitive block comprises stiff end and dynamometry end, and its stiff end is arranged on welding head holder connecting axle; Welding head holder is arranged on the dynamometry end of pressure sensitive block, and pressure sensitive block and pressure sensitive display circuit are electrically connected.
4. the spot welding head of belt electrode force checking device according to claim 3, is characterized in that: the presetting structure of described electrode force has electrode force presetting circuit, and electrode force presetting circuit and pressure sensitive display circuit are electrically connected.
5. the spot welding head of belt electrode force checking device according to claim 3, is characterized in that: described welding head holder comprises fixed electrode fixture block and float electrode fixture block two electrode fixture blocks; Fixed electrode fixture block is fastened on the dynamometry end of pressure sensitive block, and float electrode fixture block connects and composes welding head holder by tightness adjustment structure and fixed electrode fixture block.
6. the spot welding head of belt electrode force checking device according to claim 5, it is characterized in that: the lower end of two electrode fixture blocks of described welding head holder is provided with the electrode interface of installing electrodes soldering tip, the upper end of two electrode fixture blocks is provided with the screw be connected with spot welding power output cable.
7. the spot welding head of belt electrode force checking device according to claim 5, is characterized in that: described tightness adjustment structure comprises insulation bearing pin, adjusting screw(rod), insulation spacer and Compress Spring; Float electrode fixture block is connected to the side of fixed electrode fixture block by insulation bearing pin slidably; The end of adjusting screw(rod) is tightened in the corresponding screw of fixed electrode fixture block through after float electrode fixture block, be interposed between insulation spacer and make the two keep insulating between adjusting screw(rod) and float electrode fixture block, Compress Spring provides the motive force away from fixed electrode fixture block for float electrode fixture block.
8. the spot welding head of the belt electrode force checking device according to any one of claim 3 to 7, is characterized in that: described welding head holder is provided with welding head of electrode, and welding head of electrode plays the effect that electrode force checkout gear pressure bar transmits electrode force simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510033923.1A CN104607790A (en) | 2015-01-22 | 2015-01-22 | Electrode force detection device and spot welding machine head provided with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510033923.1A CN104607790A (en) | 2015-01-22 | 2015-01-22 | Electrode force detection device and spot welding machine head provided with same |
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| Publication Number | Publication Date |
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| CN104607790A true CN104607790A (en) | 2015-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510033923.1A Pending CN104607790A (en) | 2015-01-22 | 2015-01-22 | Electrode force detection device and spot welding machine head provided with same |
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| Country | Link |
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| CN (1) | CN104607790A (en) |
Cited By (2)
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| WO2016115712A1 (en) * | 2015-01-22 | 2016-07-28 | 广州微点焊设备有限公司 | Electrode force detection apparatus and spot welder head having same |
| CN111906426A (en) * | 2019-06-04 | 2020-11-10 | 中车大同电力机车有限公司 | Manual single-side single-point resistance spot welding device |
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Application publication date: 20150513 |
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