CN104602856A - Weld head for holding spring assembly - Google Patents
Weld head for holding spring assembly Download PDFInfo
- Publication number
- CN104602856A CN104602856A CN201380047577.1A CN201380047577A CN104602856A CN 104602856 A CN104602856 A CN 104602856A CN 201380047577 A CN201380047577 A CN 201380047577A CN 104602856 A CN104602856 A CN 104602856A
- Authority
- CN
- China
- Prior art keywords
- welding
- spring leaf
- leaf group
- rod
- piston 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.)
- Pending
Links
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
- B23K11/30—Features relating to electrodes
- B23K11/31—Electrode holders and actuating devices therefor
- B23K11/318—Supporting devices for electrode holders
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Resistance Welding (AREA)
- Springs (AREA)
Abstract
The disclosed weld head has a mounting position for holding a self-contained and replaceable spring assembly which, in the mounted position, is arranged in the power flow between the drive unit and the electrode. The mounted position of the spring assembly offers great flexibility in terms of the range of required spring forces. The weld head can thus be easily and quickly retooled to substitute one method for another one. All it takes to do that is to place a suitable spring assembly in the mounted position. It is not absolutely necessary to carry out other mounting steps such as screwing parts together. The spring assembly that is mounted in the weld head has the advantage of controlling the slipping path of the weld head while keeping the welding force nearly constant during the entire process. The spring assembly thus allows for an optimal and very quick slipping behavior of the electrode during the welding process. The weld head can therefore be used for highly complex welding operations with nonferrous metals. Furthermore, the compact design allows the weld head to be used as the basic feature of a platform concept using said resource. In addition, the movable electrode allows the weld head to be used for various material flow systems such as slider mounts, rotary tables, or workpiece holders.
Description
Technical field
The present invention relates to a kind of welding head for implementing resistance melting welding, resistance brazing or hot riveting, wherein having workpiece to be connected to be joined to one another in locking manner or by solder flux by resistance heated material while being applied to by pressure (weld force) on joint (being so-called pad during welding).
Background technology
When carrying out resistance melting welding, by two workpiece that can conduct electricity being heated by electric current by electricity, until fusing.The after coagulation that described melt passes through at electric current, and formation is welded to connect.At this, in the process that electric current passes through and at electric current by afterwards as necessary by extruding the formation supporting close connection (resistance-extruding-welding).In general described resistance melting welding carried out when not supplying additional materials.Described resistance spot welding as the special shape of resistance melting welding such as junction steel plate in Auto-body manufacturing and Rail car manufacture.But it also such as can be used for welding of aluminum or other metal when manufacturing joint or the contact assembly for relay switch and line protection switch of capacitor, coil and motor winding.Described resistance spot welding provides following advantage: focus on the less surface of workpiece in the form of electric current by higher energy within the extremely short time, wherein produces when supplying to give that mode that is pneumatic or electromechanics applies, higher pressure the connection that can not unclamp.
When carrying out resistance brazing, electric produces heat by electric current on soldering point.It is suitable for the parts of different quality, such as finding sealing on the sheet material having higher thermal conductivity.Described soldering point forms resistance and directly heating at this.
For described application, known welding head.These welding heads carry welding rod, and described welding rod obtains supporting in the mode can moved towards the direction of corresponding welding rod.To workpiece to be joined be had first to be positioned between two welding rods, and be expressed on described corresponding welding rod by the motion of the welding rod of described welding head subsequently.In connection procedure, occurring material softening phenomenon by required technological temperature and weld force, there is the so-called sliding phenomenon (Nachsetzen) of described welding head in described material softening phenomenon because described welding rod acts on the pressure on workpiece.
A kind of from known in the state of the art there is drive unit and there is the welding head of the welding rod obtaining supporting in the mode that can move, examination is with reference to " Mikroschwei kopf mit einstellbarer Elektrodenkraft ", and this file existed on the internet on September 28th, 2010
www.isomatic.com/html/Deutsh/ksk.htmplace obtains.At this, described weld force can be adjusted between 0.7 and 200 newton.
A kind of welding head of the welding rod having drive unit and obtain supporting in the mode that can move also obtains open from file " Constant Force Weld Head by MacGregor ", and this file existed on October 5th, 2010
http:// www.macgregorsystems.com/files/downloads/Constant%20 Force%20Weld%20Head.pdfplace obtains.
In this prior art, for weld force, namely by described welding rod be applied to the pressure on workpiece adjustment and control carry out indirectly by the pressure reducer be on the pneumatic linear actuator of described drive unit.As an alternative, a force snesor is positioned between welding rod and work rest accommodation section, for measuring described weld force.But the mode of this direct measurement is for being different and cumbersome often kind of applicable cases.
A kind of electric resistance welding head for carrying out resistance melting welding and resistance brazing is disclosed from WO 2012045763 A1.This electric resistance welding head also can be born by the structure of its physics very large, more than the power of 2000N.Flux of force from pneumatic linear actuator to welding rod is on lines.Therefore, not there is moment.Described welding head, the parts that can move have less quality, are conducive to slippage fast thus.Directly in flux of force, measure described weld force, and described weld force can be inquired about continuously at this.Described weld force is similar in welding process keeps constant, and can very accurately adjust.Described welding head is formed according to a kind of platform scheme, and can be arranged in often kind of arbitrary position.Described slippage is realized by compression spring.Described welding head is suitable for implementing resistance melting welding.Due to the structure of its physics, described welding head also can be changed very large power with very fast slip characteristic and the change of described weld force be remained in that can ignore, very little degree in this process.Described slip characteristic is realized by compression spring.This welding head is shown in Fig. 1, the 2a of the application, 2b, 3 and 4.
Summary of the invention
Task of the present invention is, provides a kind of welding head, and it is allowed for the rapid refit of different application situation.
This task is by having drive unit and the welding head of welding rod that movably supports solves.Described welding head has for holding installation site that is self-contained and the spring leaf group that can change, and wherein said spring leaf group is arranged in the power stream between described drive unit and described welding rod in described installation site.
Advantage mentioned below need not be obtained by the theme of independent claims.In fact the advantage obtained by each embodiment, flexible program or improvement project can also be related to here.
Installation site for spring leaf group provides very large flexibility in the scope of required spring force.Thus, the welding head for distinct methods can be reequiped quickly and easily when method substitutes.For this reason, corresponding suitable spring leaf group must only be installed in this installation site.Other installation step are not required as screwed.
The spring leaf group be arranged in welding head brings following advantage: regulate the slippage stroke of welding head and keep the weld force duration of technique almost constant simultaneously.Described spring leaf group therefore achieve welding rod weld period the best and slip characteristic very fast.Therefore, welding head can be used in requiring harsh non-ferrous metal welding.
If want the repacking of welding head disclosed in WO 2012045763 A1 to be used for new purposes, just its compression spring must be replaced with other.This requires that welding head is installed separately in the prior art, this Expenses Cost.On the other hand, the Novel welding head with spring leaf group then achieves the very fast replacing of compression spring.
In addition, this design achieves the compact make of welding head.Also achieve human engineering with semimechanized solution thus.In addition, the installation site of welding head is arbitrary.Can also welding head be made simply to insulate.In addition, described compact design achieve welding head as basic element be used in application these Countermeasures on Resources Platform Designing framework in.Described welding head can also be used for different flow of material systems as slide block device, rotary table feeder or work rest by its movable welding rod.
According to a kind of embodiment, welding head comprises framework, and this Frame Design is for holding spring leaf group.
In a kind of improvement project, described framework has space, especially in order to adjust the prestressing force of described spring leaf group, even if described spring leaf group also easily can be touched from outside by described space in installment state.
The advantage of this embodiment is on the one hand, can be come fast by described space and mount and dismount described spring leaf group simply.Being also advantageous in that of described space, even if the prestressed adjustment also can implementing for described compression spring by described space in installment state.
According to a kind of embodiment, described framework has the female circular open of band along the axial direction of described spring leaf group.
The advantage of this embodiment is, piston rod can be guided by the circular open of described framework, described piston rod carrys out transmitting force with spring leaf group and framework acting in conjunction in an advantageous manner, and can be designed on the other hand by positive fastening spring vane group and thus for reequiping welding head rapidly simply.
In a kind of improvement project, described welding head comprises piston rod, and described piston rod is movably guided by spring set bolt, and described spring set bolt is the backstop of the head formation dorsal part of described piston rod.Described spring set bolt utilizes external screw thread to be so screwed in described framework, thus to be expressed in described spring leaf group by described spring set bolt by the head of described piston rod and by extra prestress application on the compression spring of described spring leaf group.
The advantage of this improvement project is: the head of described piston rod and spring set bolt in an advantageous manner with spring leaf group and framework acting in conjunction with transmitting force, and be designed for fastening spring vane group and thus for reequiping welding head rapidly simply by positive on the other hand.
According to a kind of embodiment, the head formation of described piston rod is used for the connection forming positive with described spring leaf group.As an alternative or additional project, the head of described piston rod has central void, and described central void is designed to end that hold rigidity when compressing described spring leaf group, that be arranged in the guiding pin in described spring leaf group vertically.
The advantage of this embodiment is, head and the spring leaf group of described piston rod form positive.For this reason, the head of described piston rod is such as marginally around the end of described spring leaf group.Therefore spring leaf group ensure that, even if all can never be jumped out under high pressure.The advantage of described central void is, spring leaf group can utilize short, vertically the guiding pin be arranged in spring leaf group be installed in welding head.This spring leaf group has closely and modular version.
In a kind of improvement project, described welding head has water swivel and cooling water connects portion, and the described cooling water portion of connecting is designed for the described welding rod of cooling.As an alternative or additional project, described welding head has current joint and insulating part, and described insulating part makes described framework and described welding rod electric insulation, thus gets rid of the current path flowing through described spring leaf group and described drive unit.
According to a kind of embodiment, after the described spring leaf group of loading, described drive unit, described spring leaf group, force snesor and described welding rod are arranged on one wire, thus the position being applied to the power on described welding rod from described drive unit or described spring leaf group is extended through described force snesor and described welding rod in central authorities.
The linear arrangement of drive unit, spring leaf group and welding rod optimizes the slip characteristic (Nachsetzverhalten) of welding rod, because there will not be moment between drive unit and bonding station or between flexible member and bonding station.Moment can cause friction during guiding welding rod to increase and brings larger inertia and bring the worse slip characteristic of welding head thus.On the other hand, the slip characteristic that described welding head achieves next-door neighbour bonding station place realizes carries out regulating through optimal design.The prior advantage of this design is, thus from drive unit via the direct power stream of spring leaf group to welding rod.Be used for slippage in this spring leaf group to regulate.Because the position of weld force central authorities and along through welding rod extend, therefore there will not be the relative motion with workpiece.This results in high reproducibility and few welding rod (Elektrode) wearing and tearing.
In a kind of improvement project, described welding head is designed for and described welding rod and described drive unit is synchronized with the movement, as long as described welding rod is not resisted against on any workpiece, its mode is for be applied to pressure described welding rod from described drive unit.In addition, described welding head is designed for and described welding rod and described drive unit is removed be coupled and for making described welding rod move relative to described drive unit by described spring leaf group, as long as described welding rod is resisted against on workpiece.
According to a kind of embodiment, spring leaf group to be arranged on welding rod to transmit weld force and to be designed for the slip characteristic regulating welding rod relative to workpiece.
The advantage of above-mentioned embodiment is, regulates the slippage stroke of welding head and keeps the weld force duration of technique almost constant simultaneously.Therefore described spring leaf group achieves the slip characteristic of welding rod in weld period the best.Therefore, welding head can be used in requiring harsh non-ferrous metal welding.
In a kind of improvement project, described welding head is designed for and makes described welding rod shift out period feeding one welding rod stroke, until described welding rod is placed on workpiece at piston rod.In addition, this welding head is designed for and makes described spring leaf group shift out period compression one spring travel at described piston rod after described welding rod is placed on described workpiece, wherein said spring travel forms the difference of cylinder stroke and welding rod stroke and limit weld force together with the prestressing force of described spring leaf group, and described weld force is applied on described workpiece.In addition, described welding head is designed for and makes described welding rod feeding one slippage stroke during welding process by described spring leaf group, wherein reduces a slippage stroke by the compression of described spring leaf group.
According to a kind of embodiment, described welding head has switch, especially with back-coupled generator, contactless limit switch.Described switch designs is for obtaining the relative motion between described welding rod and described piston rod, and described relative motion obtains by making the overvoltage of described spring leaf group after being put on workpiece by described welding rod.In addition, described welding head also comprises controller, and described controller discharges welding current and do not discharge welding current when not having relative motion in the case of a relative movement depositing.
In a kind of improvement project, described piston rod is provided with fine thread.On described piston rod, the stop nut of top utilizes the adjusting nut of top to be screwed in backstop, and the adjusting nut of wherein said top encounters component when leading back to described piston rod, limits the stroke of described piston rod thus.In addition, on described piston rod, the stop nut of below utilizes the adjusting nut of below to be screwed in backstop, and the adjusting nut of wherein said below encounters component when described piston rod feeding, limits the stroke of described piston rod thus.
The stroke that this improvement project provides for the pneumatic linear actuator of welding head limits.Accurately can limit the applied force of spring leaf group thus.In addition, this stroke limits and solves following problems: mutually screw for having, for the interconnected and drive unit of multiple pneumatic linear actuator groups of series connection, the cylinder of bottom cannot arrive backstop place due to the tolerance of cylinder.
According to a kind of embodiment, welding head is designed for and between 500N to 10,000N, adjusts weld force by being equipped with different spring leaf groups.
At this, described weld force is correspondingly only slightly high than the prestressing force of described spring leaf group at this, if described spring leaf group by the drive unit of described welding head only slightly with the dynamic spring travel overvoltage of 1.5mm to 2mm.The cylinder active force of the pneumatic linear actuator of described drive unit should be greater than the maximum prestress of described spring leaf group, can overcome the maximum prestress of described spring leaf group and to make the overvoltage of described spring leaf group.But advantageously, selected by described cylinder active force high unlike the maximum prestress of described spring leaf group too many, its mode is reduce the number of the cylinder component of connecting or turn down the compressed air pressure of described cylinder.If use diverse spring leaf group, so described cylinder active force should more than the maximum prestress of 10,000N.
As long as the drive unit of described welding head, the cylinder active force of pneumatic linear actuator is not enough to have higher prestressed spring leaf group overvoltage for making, additional cylinder component just can advantageously be tightened on described pneumatic linear actuator as compartment (Zelle) and connect with this pneumatic linear actuator by that.
Also can reequip described welding head to carry out resistance brazing or hot riveting when method substitutes thus because described method, for this reason required power is obviously different from each other.Described spring leaf group can realize simple especially spring for this reason and change.Especially said spring leaf group can realize the stepless fine adjustment for described weld force by the prestressing force that can change where necessary.
Described welding head can be used in carrying out melting welding, especially resistance melting welding, resistance pressure-welding or resistance spot welding, carries out soldering, especially resistance brazing, or carries out hot riveting.
This provide following advantage: described welding head can substitute by method the Countermeasures on Resource being used as different technologies.
For the calibration steps for described welding head, described spring leaf group is installed in described welding head.The welding rod of described welding head is placed on workpiece.Repeatedly welding pressure is measured subsequently by the force snesor be arranged between described spring leaf group and described framework.Adjust the prestressing force of described compression spring, until measured welding pressure is equivalent to rated value.
In a manufacturing method, described spring leaf group is installed in described framework.Described spring set bolt is screwed in described framework, thus the head of described piston rod to be extruded in described spring leaf group and by extra prestress application on the compression spring of described spring leaf group by described spring set bolt.
Accompanying drawing explanation
By accompanying drawing, embodiments of the invention are explained in detail below.Accompanying drawing illustrates:
Fig. 1 is together with the diagram being decomposed into its part from the view of the welding head of prior art;
Fig. 2 a is that the front view of the welding head of Fig. 1 is together with profile;
Fig. 2 b is the side view of the welding head of Fig. 1;
Fig. 3 is the first detailed view of the welding head of Fig. 1;
Fig. 4 is the second detailed view of the welding head of Fig. 1;
Fig. 5 is spring leaf group;
Fig. 6 is the welding head with installed spring leaf group;
Fig. 7 is the detailed diagram of the spring leaf group of Fig. 5;
Fig. 8 is the part of described spring leaf group;
Fig. 9 is in the spring leaf group in installation state in the machine;
Figure 10 is the stroke limiting mechanism for pneumatic linear actuator;
Figure 11 is the operation method of the welding head for having installed spring leaf group;
Figure 12 is the diagram described spring leaf group pulled down from machine;
Figure 13 is the welding head with water swivel and electric connection;
Figure 14 is the welding head with electrical insulation;
Figure 15 is the adjusting nut with electrical insulation; And
Figure 16 is the welding head with installed spring leaf group.
Detailed description of the invention
Fig. 1 shows a kind of from welding head 1 disclosed in WO 2012045763 A1, and this welding head has drive unit 2, welding rod 3 and resilient element 4, such as compression spring, and these arrangements of elements are on position 5.Also sensor 8, spacer sleeve 21, piston rod 20 and welding rod guide member 31 is shown extraly.Fig. 1 illustrate in detail the installation situation of mentioned element.
In addition, Fig. 1 shows a kind of force snesor 7, and this force snesor is arranged between described resilient element 4 and described welding rod 3.Described force snesor 7 be in thus between described drive unit 2, the element 4 of described electricity and described welding rod 3, directly in flux of force.Latch 72 is connected with the axis of guide 75 of described resilient element 4.Described latch can be fixedly mounted in by reversing retainer the easy installation and removal realizing described force snesor 7 in the acting in conjunction of the adjusting nut 73 on the extension of described drive unit 2 by O RunddichtringO.
Be installed in the second adjusting nut 74 on the described axis of guide 75 for adjusting the prestressing force of described resilient element 4.
Fig. 2 a shows the section of front view together with described welding head 1 of the welding head 1 of Fig. 1.Show drive unit 2, welding rod 3 and resilient element 4 once again, they are arranged on position 5 linearly.In addition spacer sleeve 20 and welding rod guide member 30 can be clear that.Supplementing as cylinder stroke Z, spring travel F and welding rod stroke E, also shows prestressing force V, in fig. 2 a with this prestressing force V for amplitude makes described resilient element 4 pretension.
In addition, Fig. 2 a shows a kind of force snesor 7, and this force snesor is arranged between described resilient element 4 and described welding rod 3.Described force snesor 7 be in thus described drive unit 2, between described resilient element 4 and described welding rod 3, directly in flux of force.Latch is connected with the axis of guide 75 of described resilient element 4.Described latch can be fixedly mounted in by reversing retainer the easy installation and removal realizing described force snesor 7 in the acting in conjunction of the adjusting nut 73 on the extension of described drive unit 2 by O RunddichtringO.The performance situation of described the second adjusting nut 74 be installed on the axis of guide 75 as front as stated.
Fig. 2 b shows the welding head 1 of Fig. 1 with side view.Except being arranged in drive unit 2, resilient element 4 and the welding rod 3 in position 5 once again linearly, Fig. 2 b also shows spacer sleeve 21, sensor 8 and the joint for voltage measurement line 50.The described joint for voltage measurement line 50 is used herein to the voltage drop of measuring between described welding rod.Other element described has the function identical with situation described above.
Fig. 3 shows the first detailed view of the welding head 1 of Fig. 1.Be highlighted the described axis of guide 75 in the example shown, this axis of guide is used as the guide of described compression spring.Described also can be called as guiding pin the axis of guide 75 exceed out and away described compression spring extend through described welding head 1 other structural detail, such as illustrate in figures 3 and 4, with the coefficient adjusting nut 73 of latch 72.This causes following result: described compression spring can only be replaced by great expense actually, because must dismantle and take a large amount of component of described welding head 1 apart for this reason.
Fig. 4 illustrate in detail the structure on the compression spring for power being delivered to described welding head 1.
Fig. 5 shows a kind of spring leaf group 100, structural detail that this spring leaf group replaces the welding head known from prior art at least in part, that illustrate in figs. 3 and 4 and have obvious advantage in addition.Except compression spring 104, also show embedding dish 102, this embedding dish is fixed by hex bolts 104 and applies prestress to together with adjusting nut 120 on described compression spring 104.
Compression spring is the component that can relax under a load and turn back to after elimination capacity in its original shape, and thus described compression spring has the characteristic flexibly resetted.The power back driven of compression spring according to Hooke's law and point of force application, be in reverse to power draw direction be moved into ratio, described compression spring works along described power draw direction.
The spring leaf group 100 that Fig. 6 shows a kind of welding head 1, Fig. 5 is loaded in described welding head 1.Described spring leaf group 100 is loaded in framework 180 at this.In addition, welding rod 3 and the drive unit 2 of described welding head 1 can be clear that.Come to compress described spring leaf group 100 extraly by spring set bolt 130, method is: the head of piston rod is expressed in described spring leaf group 100 by described spring set bolt 130.In the head thus power of defined amount being applied to described piston rod and described spring leaf group 100, produce a kind of flux of force thus.The head of described piston rod forms positive with described spring leaf group 100 in addition, ensures thus, and described spring leaf group can not be jumped out from described welding head 1.
Fig. 7 diagrammatically show a kind of spring leaf group 100 with detailed.Compression spring 104 is by having the adjusting nut 120 of internal thread 122 and being in axial direction restricted by embedding dish 102.Described embedding dish 102 is fixed on guiding pin 110 by hex bolts 101., described hex bolts 102 is screwed in the internal thread 111 of described guiding pin 110 for this reason, and by described embedding dish 102, described compression spring 104 is extruded.Prestressing force that this causes described compression spring 104, that define.Sheath 103 is on described adjusting nut 120 loosely.Described sheath 103 is shorter than the compression spring 104 under the effect being in maximum power.The lateral surface of described sheath 103, through cure process, produces material for the friction between avoiding due to described compression spring 104 and cuts down.Described sheath is used as spring guide extraly.Described guiding pin 110 has backstop 113 and external screw thread 112 on its downside.Described adjusting nut 120 is screwed on the external screw thread 112 of described guiding pin 112 by with its internal thread 122.In order to improve the prestressing force of described compression spring 104, described adjusting nut 120 is upwards screwed.The height overall 105 of described spring leaf group 100 produces from the summation of the structure height of described adjusting nut 120, compression spring 104 and embedding dish 102.Described height overall 105 is roughly equivalent to the length of described guiding pin 110.
Fig. 8 shows the part of the spring leaf group 100 of Fig. 7.Illustrate in detail described hex bolts 101, described embedding dish 102, described sheath 103, described compression spring 104, described in there is the guiding pin 110 of internal thread 111, external screw thread 112 and backstop 113.In addition, described adjusting nut 120 is shown.
Situation in installment state that Fig. 9 shows spring leaf group 100, that be in the machine.First described spring leaf group 100 is encased in framework 180 together with its part-embedding dish 102, guiding pin 110, compression spring 104, sheath 103 and adjusting nut 120.In the embodiment illustrated, between the downside and described framework 180 of described spring leaf group 100, a force snesor 7 is had.Described framework 180 is such as installed in welding head or other arbitrary machine.
After described force snesor 7 and described spring leaf group 100 are encased in described framework 180, spring set bolt 130 is screwed in backstop in described framework 180 always.At this, the head of piston rod 20 is expressed in described spring leaf group 100 by described spring set bolt 130, thus with the pretension stroke 131 shown in fig .9 for amplitude makes described compression spring 104 pretension extraly.Described spring set bolt 130 has a backstop for this reason, described spring set bolt can be screwed into described backstop with external screw thread in described framework 180 always.Described pretension stroke 131 from the externally threaded length of described spring set bolt 130, produce difference relative to the thickness of framework 180.
After being tightened by described spring set bolt 130, item end and the described force snesor 7 of described spring leaf group 100 and described piston rod 20 form force closure.In order to be coupled together by the head of described spring leaf group 100 with described piston rod 20, as an alternative or additional project, a kind of positive is suitable for preventing described spring leaf group 100 from jumping out when there is higher pressure.
The pretightning force of described spring leaf group 100 produces from the addition of following three kinds of spring travels:
-when screwing in described hex bolts the spring travel that produced by the compression of described compression spring, examination is with reference to the description about Fig. 7 for this reason;
-the spring travel that produces from the compression of described compression spring 104 owing to screwing in described spring set bolt 130; And
-can pass through extraly described in be in the spring travel that adjusting nut 120 in spring leaf group 100 adjusts.
In installment state, only described last a kind of spring travel can be adjusted by the adjustment of described adjusting nut 120.When described spring leaf group 100 is used in welding head, according to the measurement situation of the force snesor 7 detected current set weld force, described prestressing force is adjusted after described welding head is placed on workpiece.
In addition, for the implementation capacity of described compression spring 104, conclusive is the stroke limiting mechanism of the pneumatic linear actuator of described machine, and wherein said spring leaf group 100 is loaded in described machine.The element of the machinery of such stroke limiting mechanism is shown in Figure 10.Show drive unit 2 at this, this drive unit such as comprise three that connect each other, as the pneumatic linear actuator of power assembly (Kraftpaket).The piston rod 20 of described drive unit is provided with fine thread 146, and the adjusting nut 141 above the stop nut 143 above on this fine thread utilizes is screwed in backstop.The adjusting nut 141 of described top is resisted against on described drive unit 2, and forms stroke limiting mechanism thus.In addition, the stop nut 144 of below utilizes the adjusting nut 142 of below to be screwed in backstop, and the adjusting nut 142 of described below encounters the backstop 145 of described machine and the stroke of the described piston rod 20 of same restriction thus when described piston rod 20 shifts out.In addition, described stroke limiting mechanism solves following problem: being multiplely tightened onto top of one another for having, being bound up and the drive unit 2 of the pneumatic cylinder component of connecting each other, nethermost cylinder can not move on to the end due to the tolerance of described cylinder always.
Figure 11 shows a kind of operation method of the welding head for having installed spring leaf group 100.Framework 180, force snesor 7 and piston rod 20 and spring set bolt 130 are in this and the acting in conjunction just as depicted in figure 9 of described spring leaf group 100.This show described welding head extraly, the welding rod 3 that is permanently connected with framework 180 and show workpiece 6.
Figure 11 show described welding head, situation about being in the first running status 11, the second running status 12, the third running status 13 and the 4th kind of running status 14.Described piston rod 20, spring leaf group 100, force snesor 7 and welding rod 3 are arranged in position.Described workpiece 6 is welded to one another object together to run described welding head.
Described piston rod 20 along vertical line by described spring leaf group 100, force snesor 7, frame 180 and its driving force being put to good use on described workpiece 6 finally by described welding rod 3.The electrodeposited coating of described welding rod 3 prevents the corrosion of described welding rod 3 and avoids contact resistance variation thus.
Described force snesor 7 is arranged between described spring leaf group 100 and described framework 180.This force snesor be in thus described piston rod 20, between spring leaf group 100 and welding rod 3, directly in flux of force.Also can replace described force snesor 7 and a distance piece is installed, this distance piece can the moment afterwards replace by described force snesor 7.
Force snesor (being also referred to as power receiver) measures the power in the face that is applied to it.The box-like force snesor of such as can measures the distortion of its metallic object by deformeter, the resistance of described deformeter changes along with described distortion.
In the first running status 11 described, described welding head is in home position.Next will think, described piston rod 20 is driven by the pneumatic linear actuator be moved in the first running status 11 described.Described drive unit also can be a kind of power assembly, and this power assembly comprises three pneumatic linear actuators.Described pneumatic linear actuator is in above described piston rod 20 at this in inactive state.Described welding head or its welding rod 3 are not placed on described workpiece 6.In described spring leaf group 100, only a kind of power in action, and this power produces spring travel depicted in figure 9 from set prestressing force or described three kinds.In the first running status 11 described, as long as implement installation steps shown in fig. 12, just can take out described force snesor 7 and described spring leaf group 100 and be replaced.
In described the second running status 12, described piston rod 20 to move out completely in the scope that the stroke of Figure 10 limits.Described welding rod 3 experiences welding rod stroke when changing described the second running status 12 into from the first running status 11 described and is placed on described workpiece 6.Because it is shown in Figure 10 to meet described backstop 145(at described piston rod 20 with the adjusting nut 142 below it) before described welding rod 3 be placed on described workpiece 6, so as existed in the first running status 11 described prestressed supplementary also with the spring travel F drawn in fig. 11 for amplitude extrudes described spring leaf group 100.
Therefore, spring leaf group 100 overvoltage described in described the second running status 12.Described welding rod 3 is expressed on described workpiece 6 with defined weld force now.Described weld force this from described by three kinds depicted in figure 9 pretightning force that forms of spring travel and described spring travel F produce.Described spring travel F at this corresponding to the cylinder active force be applied to by described piston rod 20 in described spring leaf group 100.Pretightning force and cylinder active force are determined to be applied to making a concerted effort on described workpiece 6 by described spring leaf group 100 thus.If described force snesor 7 is loaded in described framework 180, that just can determine accurate weld force in described the second running status 12 and by described spring leaf group 100, the adjusting nut 120 shown in accompanying drawing above adjusts it.By the embodiment of described spring leaf group 100, than if adjust described weld force between 500N and 10,000N, wherein can provide and the multiple spring leaf group with strong and weak different compression springs of optional use to cover this number range.
The prestressing force of described compression spring is such as set between 1.8 and 8.5mm.Described spring travel F is such as set between 1 and 3mm, is such as approximately set as 1.5mm.By design conditions, also can produce other, for described weld force, spring travel F and prestressed limiting value and standard value.Shown in Figure 16 by proximity switch 162() can determine whether carried out described welding rod 3 relative to the relative motion of piston rod 20, namely described spring leaf group 100 whether overvoltage.Inquiring about described proximity switch 162(energetically see Figure 16) time release welding current, thus described workpiece 6 is welded.
Described welding process is originally carried out between described the second running status 12 and the third running status 13 described, and terminates in rear a kind of running status.In described welding process, described workpiece 6 generates heat and becomes soft like dough.At this, described welding rod 3 with slippage stroke N in amplitude sinks to described workpiece 6.Produce described welding rod 3 thus towards the sliding motion in the lax material of workpiece 6.Correspondingly, the compression degree of described spring leaf group 100 reduces described slippage stroke N with described spring travel F for starting.Due to the structure of described welding head, described slipping is carried out soon, and the interference of weld force is remained in minimum degree at this.Along with the reduction of described spring travel F, the power of the compression spring of described spring leaf group 100 has also reduced corresponding amount.The loss of this power due to very short when slippage, to be in millimeter within the scope of stroke and can ignore.
Described 4th kind of running status 14 demonstrates described piston rod 20 and be shifted out this situation completely in the scope that its stroke limits, but wherein there is not workpiece 6, and thus described welding rod 3 is passed by towards vacancy.In this case, thus do not have with described spring travel F for amplitude is compressed described spring leaf group 100, that is, not to the loading of described spring leaf group 100 in described 4th kind of running status.This can be detected by the proximity switch 162 of Figure 16, and exists for carrying out the workpiece welded for checking whether.Described spring travel F equals zero in this case.This can be determined by the proximity switch 162 of Figure 16, does not discharge described welding current subsequently.
In a word, if described welding rod 3 its not to be resisted against on workpiece 6 just always with the synchronized movement of described piston rod 20 move.Once described welding rod 3 is resisted against on workpiece 6, it is just removed with described piston rod 20 and to be coupled and relative to the motion campaign of described piston rod 20.This point can be realized by described spring leaf group 100.
Figure 12 shows spring leaf group 100 from situation about machine, such as pulling down from welding head described above.The structure of shown element is corresponding with the embodiment of Fig. 9 and 11 at this.In order to pull down the described spring leaf group 100 be loaded into together with force snesor 7 in framework 180, in the first installation steps 61, unclamp spring set bolt 130 coefficient with described spring leaf group 100 as depicted in figure 9.Thus, power is no longer applied in described spring leaf group 100 by this connected structure.Because described spring leaf group 100 is in described framework 180 now loosely, so can pull out described force snesor 7 in described second installation steps 62, described spring leaf group 100 slides into or falls on the bottom of described framework 180 thus.In the 3rd installation steps 63 itself, described spring leaf group 100 taken out from described framework 180 subsequently and replaced if desired.
The installation of described spring leaf group or force snesor 7 is correspondingly carried out with the order put upside down of described installation steps.Finally, then after the described force snesor 7 of loading, described spring set bolt 130 must be tightened to the end again.
Figure 13 shows a kind of welding head 1 with current joint 171 and water swivel 172.Described joint is on the dorsal part of described welding head 1.Described water swivel 172 carries out water cooling for connecting portion by cooling water to described welding rod 3.
Figure 14 shows an intercepting part of welding head, and described welding head has spring leaf group 100, framework 180 and insulating part 150, and described insulating part 150 ensures the correct current path flowing through workpiece when welding.Between part that described insulating part 150 is positioned in described framework 180 and described welding head as the pressure plare of insulation, that have below welding rod.
Figure 15 shows the profile of the adjusting nut 120 with electrical insulation, and described adjusting nut is used for being used in Fig. 5, Fig. 6, Fig. 7, Fig. 9, Figure 11, Figure 12, Figure 14 and spring leaf group illustrated in fig. 16.Described adjusting nut 120 has a recess, and the end of the below of described compression spring can be positioned in described recess.Therefore the diameter of described recess is equivalent to described spring-overall diameter 121.In order to be screwed into by described adjusting nut 120 on the external screw thread of described guiding pin, described adjusting nut 120 has internal thread 122.
In order to carry out electric insulation to described spring leaf group, described adjusting nut 120 comprises two layers.Skin is illustrated by the hacures declined to the right in fig .15, and described skin is made up of opaque plastics.Described guiding pin 110, the backstop 113 that illustrates in figures 7 and 8 is made up of identical material.By all these measures, get rid of and flow through described spring leaf group and the current path therefore flowing through described piston rod.
Figure 16 shows a complete welding head 1, and this welding head spring leaf group 100 that can change fast and easily works.Except drive unit 2, also show shown in Fig. 10 and explain, the stop nut 144 of the adjusting nut 141 of top, the stop nut 143 of top, the adjusting nut 142 of below and below.Further there is illustrated the proximity switch 162 with knurled nut 161, described knurled nut is used for as in the border, field of Figure 11 for the proximity switch 162 for partial query (Teilabfrage) as described in adjusting.Described spring leaf group 100 is loaded in framework 180.
The adjusting nut of described spring leaf group 100 even can also touch from the outside in installment state, for adjusting described prestressing force.In shown welding head 1, replace force snesor and use a compensating disc 165.This compensating disc when needed can replace by force snesor.The welding rod 3 of described welding head 1 is maintained by welding rod support 166.
Described embodiment, improvement project and embodiment can freely combinations with one another.
Claims (17)
1. welding head (1),
-the welding rod (3) that there is drive unit (2) and movably support,
-having for holding installation site that is self-contained and the spring leaf group (100) that can change, wherein said spring leaf group (100) is arranged in the power stream between described drive unit (2) and described welding rod (3) in described installation site.
2. by welding head according to claim 1 (1),
-there is framework (180), described Frame Design is for holding described spring leaf group (100).
3. by welding head according to claim 2 (1),
-wherein said framework (180) has space, and especially in order to adjust the prestressing force of described spring leaf group (100), described spring leaf group (100) even if also can touch from the outside by described space in installment state.
4. by the welding head (1) described in Claims 2 or 3,
-wherein said framework (180) has the female circular open of band along the axial direction of described spring leaf group (100).
5. by welding head according to claim 4 (1),
-there is piston rod (20), described piston rod is movably by spring set bolt (130) guiding, and described spring set bolt is the backstop of the head formation dorsal part of described piston rod (20),
-wherein said spring set bolt (130) can utilize external screw thread to be so screwed in described framework (180), thus it is upper and by extra prestress application on the compression spring (104) of described spring leaf group (100) that the head of described piston rod (20) is expressed to described spring leaf group (100) by described spring set bolt (130).
6. by welding head according to claim 5 (1),
The head formation of-wherein said piston rod (20) is used for the connection forming positive with described spring leaf group (100), and/or
The head of-wherein said piston rod (20) has central void, and described central void is designed to end that hold rigidity when compressing described spring leaf group (100), that be arranged in the guiding pin (110) in described spring leaf group (100) vertically.
7. by the welding head (1) according to any one of claim 2-6,
-there is water swivel (172) and cooling water connects portion, be designed for the described welding rod of cooling (3), and/or
-there is current joint (171) and insulating part (150), described insulating part makes described framework (180) and described welding rod (3) electric insulation, thus gets rid of the current path flowing through described spring leaf group (100) and described drive unit (2).
8. by welding head in any one of the preceding claims wherein (1),
-wherein after the described spring leaf group (100) of loading, described drive unit (2), described spring leaf group (100), force snesor (7) and described welding rod (3) are arranged on one wire, thus make from described drive unit (2) or described spring leaf group (position (5) that 100)s were applied to the power on described welding rod (3) in central authorities through described force snesor (7) and described welding rod (3) extension.
9. by welding head in any one of the preceding claims wherein (1),
-be designed for described welding rod (3) and described drive unit (2) be synchronized with the movement, as long as described welding rod (3) is not resisted against on any workpiece, its mode for pressure is applied to described welding rod (3) from described drive unit (2), and
-be designed for and described welding rod (3) and described drive unit (2) removed be coupled and for making described welding rod (3) move relative to described drive unit (2) by described spring leaf group (100), as long as described welding rod (3) is resisted against on workpiece (6).
10. by welding head in any one of the preceding claims wherein (1),
-wherein said spring leaf group (100) layout is used for weld force being delivered to described welding rod (3) and goes up and be designed for the sliding motion regulating described welding rod (3) relative to workpiece (6).
11. by welding head in any one of the preceding claims wherein (1),
-be designed for and make described welding rod (3) shift out period feeding one welding rod stroke at piston rod (20), until described welding rod (3) is placed on workpiece (6),
-be designed for described welding rod (3) be placed in described workpiece (6) upper after make described spring leaf group (100) shift out period compression one spring travel (F) at described piston rod (20), wherein said spring travel (F) forms the difference of cylinder stroke and welding rod stroke (E) and limit weld force together with the prestressing force of described spring leaf group (100), described weld force is applied on described workpiece (6), and
-be designed for and make described welding rod (3) feeding one slippage stroke (N) during welding process by described spring leaf group (100), wherein reduce a slippage stroke (N) by the compression of described spring leaf group (100).
12. by welding head according to claim 11 (1),
-there is switch (162), especially with back-coupled generator, contactless limit switch,
-wherein said switch (162) is designed for the relative motion obtained between described welding rod (3) and described piston rod (20), described relative motion is passed through after described welding rod (3) being put into workpiece (6) and being upper, the overvoltage of described spring leaf group (100) to be obtained, and
-there is controller, described controller discharges welding current and do not discharge welding current when not having relative motion in the case of a relative movement depositing.
13. by welding head in any one of the preceding claims wherein (1),
-wherein said piston rod (20) is provided with fine thread (146),
-wherein on described piston rod (20), the stop nut (143) of top utilizes the adjusting nut (141) of top to be screwed in backstop, the adjusting nut (141) of wherein said top encounters component when leading back to described piston rod (20), limit the stroke of described piston rod (20) thus, and
-wherein on described piston rod (20), the stop nut (145) of below utilizes the adjusting nut (142) of below to be screwed in backstop, the adjusting nut (142) of wherein said below encounters component when described piston rod (20) feeding, limits the stroke of described piston rod (20) thus.
14., by welding head according to claim 13 (1), are designed for and between 500N to 10,000N, adjust weld force by being equipped with different spring leaf groups (100).
15., by the purposes of welding head in any one of the preceding claims wherein (1), for carrying out melting welding, especially resistance melting welding, resistance pressure-welding or resistance spot welding, carry out soldering, especially resistance brazing, or carry out hot riveting.
16. for the calibration steps by the welding head (1) according to any one of claim 2-14,
-wherein said spring leaf group (100) is installed in described framework (180),
-wherein the welding rod (3) of described welding head (1) is placed on workpiece (6),
-wherein repeatedly measure welding pressure by the force snesor (7) be arranged between described spring leaf group (100) and described framework (180), and
-wherein adjust the prestressing force of described spring leaf group (100), until measured welding pressure is equivalent to rated value.
17. for have the feature of claim 5, by the manufacture method of the welding head (1) according to any one of claim 1-14,
-wherein said spring leaf group (100) is installed in described framework (180), and
-wherein said spring set bolt (130) is screwed in described framework (180), thus it is upper and by extra prestress application on the compression spring (104) of described spring leaf group (100) to make the head of described piston rod (20) be extruded to described spring leaf group (100) by described spring set bolt (130).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201210212212 DE102012212212A1 (en) | 2012-07-12 | 2012-07-12 | Welding head for receiving a spring package |
| DE102012212212.5 | 2012-07-12 | ||
| PCT/EP2013/062786 WO2014009123A1 (en) | 2012-07-12 | 2013-06-19 | Weld head for holding a spring assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104602856A true CN104602856A (en) | 2015-05-06 |
Family
ID=48670554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380047577.1A Pending CN104602856A (en) | 2012-07-12 | 2013-06-19 | Weld head for holding spring assembly |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2872284A1 (en) |
| CN (1) | CN104602856A (en) |
| DE (1) | DE102012212212A1 (en) |
| MX (1) | MX2015000494A (en) |
| WO (1) | WO2014009123A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104002070A (en) * | 2014-05-29 | 2014-08-27 | 成都陵川特种工业有限责任公司 | Welding transmission structure of partition plate of oil tank |
| DE102016204726A1 (en) * | 2016-03-22 | 2017-09-28 | Siemens Aktiengesellschaft | Resistance welding head and resistance welding system |
| CN107030364B (en) * | 2017-04-25 | 2022-08-12 | 敏实汽车技术研发有限公司 | Flexible rotation adjusting and anti-falling mechanism of resistance welding tongs |
| CN112548445A (en) * | 2020-11-27 | 2021-03-26 | 成都小巨人畜牧设备有限公司 | Automatic welding equipment for V-shaped chain |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1811987A (en) * | 1928-03-14 | 1931-06-30 | George F Wales | Spring mounting for presses and the like |
| US3901111A (en) * | 1974-04-25 | 1975-08-26 | Oberg Manufacturing Co Inc | Stripper plate spring unit |
| WO1999016573A1 (en) * | 1996-05-14 | 1999-04-08 | Newcor, Inc. | Low inertia bearing for resistance seam welding wheel |
| WO2012045763A1 (en) * | 2010-10-06 | 2012-04-12 | Siemens Aktiengesellschaft | Welding head with a force sensor, a spring and an adjusting element |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD293528A5 (en) * | 1990-04-06 | 1991-09-05 | Veb Instandsetzung Kraftwerke,De | TOOL FOR MULTI-POINT RESISTANCE WELDING USING COOLABLE WELDING ELECTRODES |
| DE19808023A1 (en) * | 1998-02-26 | 1999-09-02 | Bayerische Motoren Werke Ag | Inductive heating device for the integral connection of two workpieces |
| DE202009002908U1 (en) * | 2009-03-04 | 2010-07-15 | Conntronic Prozess- Und Automatisierungstechnik Gmbh | Welding device for capacitor discharge welding |
| DE102010005357A1 (en) * | 2010-01-21 | 2011-07-28 | ThyssenKrupp Drauz Nothelfer GmbH, 74076 | Welding electrode unit, welding apparatus and method for producing a welded joint |
| DE102010042071A1 (en) * | 2010-10-06 | 2012-04-12 | Siemens Aktiengesellschaft | Welding head used in automobile industry, for soldering operation, has electrode that is moved to drive element, by applying force on elastic element |
-
2012
- 2012-07-12 DE DE201210212212 patent/DE102012212212A1/en not_active Withdrawn
-
2013
- 2013-06-19 CN CN201380047577.1A patent/CN104602856A/en active Pending
- 2013-06-19 WO PCT/EP2013/062786 patent/WO2014009123A1/en active Application Filing
- 2013-06-19 EP EP13730559.5A patent/EP2872284A1/en not_active Withdrawn
- 2013-06-19 MX MX2015000494A patent/MX2015000494A/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1811987A (en) * | 1928-03-14 | 1931-06-30 | George F Wales | Spring mounting for presses and the like |
| US3901111A (en) * | 1974-04-25 | 1975-08-26 | Oberg Manufacturing Co Inc | Stripper plate spring unit |
| WO1999016573A1 (en) * | 1996-05-14 | 1999-04-08 | Newcor, Inc. | Low inertia bearing for resistance seam welding wheel |
| WO2012045763A1 (en) * | 2010-10-06 | 2012-04-12 | Siemens Aktiengesellschaft | Welding head with a force sensor, a spring and an adjusting element |
Also Published As
| Publication number | Publication date |
|---|---|
| MX2015000494A (en) | 2015-04-08 |
| EP2872284A1 (en) | 2015-05-20 |
| DE102012212212A1 (en) | 2014-05-22 |
| WO2014009123A1 (en) | 2014-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103228389B (en) | There is the soldering tip of force snesor, spring and adjustment element | |
| CN104602856A (en) | Weld head for holding spring assembly | |
| KR101871429B1 (en) | Electric jig device and forming method of plate | |
| US20180124872A1 (en) | Current applying apparatus, current applying method and direct resistance heating apparatus | |
| CN104640665A (en) | Spring assembly, machine, and weld head | |
| CN104661771A (en) | Method for connecting workpieces, and connection device | |
| KR20170129268A (en) | Resistance spot welding method | |
| WO2007008046A1 (en) | Bonding apparatus and method of metal plate | |
| CN104384696B (en) | Aluminum alloy plate materials resistance welding technology and welding set | |
| EP2724840A1 (en) | Welding device and method for welding of at least two material layers of a workpiece | |
| CN114245494A (en) | Heating method, heating device, and method for producing press-molded article | |
| CN201946866U (en) | Wire welder | |
| JP5904288B2 (en) | Indirect spot welding equipment | |
| KR20180055869A (en) | Spot welding electrode having a movable pressing member and spot welding method using the same | |
| JP4890855B2 (en) | Current-carrying method and apparatus | |
| CN102971107A (en) | System and method for flash-welding | |
| JP5880175B2 (en) | Electric heating method and hot press molding method | |
| JP5860281B2 (en) | Spot welding equipment | |
| KR101953998B1 (en) | Electric resistance spot welding machine by multi current supply and multi pressure | |
| CN210254665U (en) | High-power magnetic latching relay resistance welding device | |
| WO2012045746A1 (en) | Welding head with a flexible element that can variably set a prestress | |
| JP2013022623A (en) | Spot welding equipment and spot welding method | |
| KR20190001622U (en) | Welding Device | |
| EP3967436B1 (en) | Component feed system for press welders for resistance welding, and press welder comprising said system | |
| DE102010042071A1 (en) | Welding head used in automobile industry, for soldering operation, has electrode that is moved to drive element, by applying force on elastic element |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150506 |
|
| WD01 | Invention patent application deemed withdrawn after publication |