CN107262902A - A kind of automatic grinding device for lifetime of resistance spot welding electrode - Google Patents

Abstract

The invention discloses a kind of automatic grinding device for lifetime of resistance spot welding electrode, including main frame body, cutting system, cutting displacement mobile system and positioning datum adjustment mechanism；Cutting system includes the rotary power input gear, First Transition gear and the knife rest for taking combination cutlery driven successively by a rotary power alternating current generator；Cutting displacement mobile system includes reductor, power input gear and the second transition gear being engaged with driven successively by a servomotor；Coaxial assembling, structure identical second are engaged with both sides annulus cam gear ring respectively with the 3rd transition gear, and are acted on respectively with both sides cam disc by its cam ramp；Positioning datum adjustment mechanism is the adjustment for realizing positioning datum with the position relationship of two sliding sleeve gears and upper and lower cam disc respectively by adjusting two independent gear shafts.The micro-cutting amount positioning of the present invention moves cutting reconditioning mode, and significant good effect can be obtained in terms of the product point quality and spot-welding technology cost in being produced to spot welding.

Description

A kind of automatic grinding device for lifetime of resistance spot welding electrode

Technical field

The present invention is the special process equipment on welding electrode reconditioning during resistance spot welding process, more specifically, The present invention is carried out certainly on being exclusively used in the electrode of linear motion-type soldering turret or fixed spot welder during resistance spot welding process The coping device of dynamic reconditioning.

Background technology

In series spot welding technical process, by the ringing of the harsh live load such as high temperature and high pressure, electrode working surface Diameter and composition, electrode surface and workpiece surface between contact area, contact resistance and thermal contact resistance etc. with solder joint sequence Number increase constantly changes, and a series of change dynamics change the total resistance value between tack-weld and the resistance point along thickness of slab direction With proportionate relationship, the resistance heat produced between joint also constantly re-starts heat again with the change of resistance allocation proportion relation Distribution, and it is different regarding the relation of heat reallocation ratio, and butt welding point mass produces different degrees of influence.In order to reduce because of electrode Surface state changes excessive butt welding point mass and causes to take regular reconditioning electrode working surface in substantive adverse effect, production Mode, so that by the precautionary measures being limited to electrode diameter and electrode surface state in certain fluctuation range, reaching to weld The purpose that point mass dispersion is constrained in allowed band.

Electrode grinding device, which is said good-bye, moves coping device and the class of automatic grinding device two；Because product type is different, price variance great disparity.Electricity Pole reconditioning is mainly intended reaching following purpose：First, the electrode working surface diameter increased is returned into its initial set value, i.e., By the conductive surface diameter of electrode be limited in the electrode dressing phase twice fluctuate, for ensure weld nugget forming process in feed with The relative equilibrium of heat-conducting section area creates necessary condition；Second, remove electrode working surface formed in pinpoint welding procedure it is each The non-electrode original material of class, including alloy-layer is with adhering to nitride layer etc., and be simultaneously trimmed to two electrode working surfaces and workpiece table Face is parallel, with ensure to greatest extent the contact resistance between electrode working surface and workpiece surface, process additional resistance and effectively Feed sectional area etc. to fluctuate in limited range, reduce the fluctuation of all kinds of welding interface conditions and mitigate the butt welding such as temperature field transfer The adverse effect that point mass is produced.Manual coping device when using need to by people experience, should ensure to be placed in spatiality, two The uniformity and correspondence of the electrode working surface diameter of individual very little, while more to ensure that reconditioning electrode surface is with respect to this fashion The parallel relation of workpiece surface in other positions, is the work with suitable difficulty.The electrode automatic grinding of known technology Device is primarily present following deficiency：

(1) when electrode automatic grinding device works, one is coaxially clamped jointly by upper and lower electrode working surface to be grinding two-sided Integral type cutlery with cutting edge, in fixed pan by gyroaxis of electrode axis, the electrode pressure of relative constancy is all the time Act on the cutting edge of cutlery both sides, and electrode is together decided on by three parameters such as cutting edge rotating speed, electrode pressure and reconditioning times Common feature when cutting reconditioning quality etc. is existing electrode grinding device work every time, and thus produce all kinds of as described in (2) money Negative machining attribute.

(2) all kinds of negative attributes that known technology electrode automatic grinding device is determined by its cooperation principle：First, cutlery Rotated on fixed pan by axle of electrode axis；Due to not taking reconditioning quality Bit andits control measure, electrode working surface adds The lead angle of theory locus tape one of work, it is impossible to ensure parallel between two electrode surfaces after reconditioning and workpiece surface；Its Two, to reduce adverse effect impact to cutting edge of dynamic load, mostly using electrode pressure on cutting edge cutting edge after stable foundation Just start rotation working method, i.e., cutting edge tie up to very large electrode pressure effect under carry startup and rotating speed increased to by zero moment Maximum functional rotating speed, the percussion to cutting edge is very big；Third, from electrode external diameter to electrode axle center, the cutting linear velocity of cutting edge The cutting acceleration and cutting linear velocity that there is the change by V=Vmax to V=0, i.e. electrode external diameter position are maximum, counter blade The percussion of mouth is most strong；In the range of the certain radius of distance electrode axle center, because cutting linear velocity is less than critical singularities, to electrode Surface has no shear action, and the stripping between region electrode material to be cut and electrode surface is that cutting edge rotation is rolled and rotated The synthesis result of superposition is torn, uniformity and conductive capability and cutting edge life-span to electrode surface electrode material etc. is deposited Necessarily negatively affecting；Fourth, the metal to be cut in order to remove electrode axis part, it is contemplated that the electrode certainly existed is repeated Positioning precision error and cutlery rotate must pass through axle center in the factors such as necessary fit clearance, land length design, beyond axle The local cutting edge of the heart bears the bad working environments such as anti-sword cutting and hardness extruding in working angles, to cutting edge working life extremely not Profit；Fifth, resetting error precision is by the skew at build-up of pressure center, Center of Pressure skew will be to greatest extent using between cooperation Gap makes electrode dressing surface opposite piece surface form certain processing drift angle, exacerbate electrode working surface and workpiece surface it Between nonparallelism, and then electrode is fed area of section stablize relatively and quality of welding spot etc. is constituted and adversely affected.

(3) cutting force is set up using electrode pressure and cutting edge rotating speed, by electrode pressure, cutting edge rotating speed and reconditioning time etc. three The matching relationship of parameter determines reconditioning quality, rather than is controlled by the relative shift between the surface to be repaired of electrode during reconditioning and cutting edge Each reconditioning cutting output, it is difficult to the effectively excessive cutting of coordination electrode material.

(4) it is only applicable to the electrode dressing of robot soldering pliers linear movement type soldering turret.

The content of the invention

, can be right the invention provides a kind of automatic grinding device for lifetime of resistance spot welding electrode for above-mentioned prior art The electrode of all kinds of linear motion-type mash welders carries out the electrode automatic grinding device of automatic grinding, including auto soldering tweezerses, manual soldering turret Or the linear motion-type electrode in fixed mash welder.The electrode automatic grinding device of the present invention is using multiple-cutting-edge combination cutlery, micro- Positioning is carried out under the conditions of bite to welding tip face and moves reconditioning, and cutting of the cutlery cutting edge to the reconditioning of welding tip face Power sets up unrelated with electrode pressure, except can improve the working surface flatness after electrode dressing and electrode working surface and workpiece table The depth of parallelism between face, and created effectively to reduce electrode material consumption and quality of welding spot outside more preferable basic guarantee condition, also The service life of cutlery can be effectively improved.

In order to solve the above-mentioned technical problem, a kind of automatic grinding device for lifetime of resistance spot welding electrode proposed by the present invention, bag Include main frame body, cutting system, cutting displacement mobile system and positioning datum adjustment mechanism；The main frame body is integral formula zero It is the entire body gusset in irregular shape face in the middle part of part, the main frame body；One end of the main frame body gusset provided with external diameter it is identical and Upper and lower both sides are asymmetric raised circular bulge loop；Issued on the inside of the upper circular bulge loop and bevel gear wheel in knife rest The shaft shoulder mating holes that the truncated cone-shaped shaft shoulder coordinates；The upper end of the main frame body is fixed with upper cover, and the lower end of the main frame body is fixed There is lower cover lid；The upper cover, main frame body and lower cover lid constitute the complete housing of coping device；The cutting system is included by a rotation Rotary power input gear, First Transition gear and the knife rest that rotatory force alternating current generator drives successively, the knife rest pass through The shaft shoulder on bevel gear wheel top coordinates in the shaft shoulder pilot hole for being arranged on and being issued on the inside of main frame body upper circular bulge loop；The knife rest Including tool-post structure and combination cutlery, the combination cutlery includes cutter shaft, and one end of the cutter shaft is fixed with bevel pinion, described small Fixed between bevel gear and the cutter shaft using bearing pin, on the cutter shaft, from the bevel pinion to the other end of the cutter shaft It is sequentially provided with the first rolling bearing assembly, the first cutlery, the second cutlery, the second rolling bearing assembly, packing ring and locking nut；Institute It is cutting edge circular and with a plurality of spiral line type to state the first cutlery shape of cross section, and during the first cutlery rotation, cutting edge is returned The profile traces turned match with intending the welding tip plane of cutting reconditioning；The shape of cross section of second cutlery is according to cutting Position is not all the circle of different-diameter, has a plurality of cutting edge, the second cutlery rotation on the outer surface of second cutlery When, the trajectory of welding tip side of the profile traces line of cutting edge revolution with intending cutting reconditioning is coincide；The tool-post structure is One cylinder, the tool-post structure is provided with the cylindrical external gear engaged with the First Transition gear, the both sides side of the tool-post structure Wall is provided with the bearing hole intersected vertically with cylinder center axially bored line, the centre bore of cylinder and is provided with a coffin, the square The side wall in shape space cuts with the inwall in the hole and handed over, and the coffin is more than combines the first cutlery and the second sword in cutlery with described Shared space during tool revolution；The top and bottom of the cylinder are equipped with the shaft shoulder, the upper end shaft shoulder and are equipped with the first angular contact It is equipped with ball bearing, the lower end shaft shoulder on the second angular contact ball bearing, the outer shroud of first angular contact ball bearing and is equipped with one Individual bevel gear wheel；The combination cutlery is arranged on the tool-post structure, the first rolling bearing assembly and the of the combination cutlery Two rolling bearing assemblies are coordinated by the bearing hole on outer race and tool-post structure both sides side wall to be assembled, the combination sword The first cutlery and the second cutlery of tool are located in the coffin, and the bevel pinion is engaged with the bevel gear wheel；It is described Knife rest is coordinated by the shaft shoulder of the described bevel gear wheel one end assembled thereon with the main frame body shaft shoulder hole to be assembled, the knife rest Dividing plate is fixed on main frame body by lower end by bolt；The knife rest is by the shaft shoulder of the bevel gear wheel and described passes through bolt The dividing plate being fixedly mounted on main frame body realizes the combination with tool-post structure；First angular contact ball bearing and second corner connection The axial connecting line for touching ball bearing is the axis of rotation in the knife rest course of work；The cutting displacement mobile system includes being watched by one Take reductor, power input gear and the second transition gear engaged with the power input gear that motor drives successively；Institute State servomotor and the reductor is arranged at the bottom of the housing, the power input gear is assemblied in reductor output Axle penetrates the shaft end of enclosure interior, and is engaged with the second transition gear for being placed in main frame body gusset bottom；The second transition tooth It is provided with and the transition tooth of the second transition gear identical the 3rd in the rotating shaft of wheel and above the main frame body gusset Wheel；The main frame body gusset top external diameter is identical and each fixing assembling 1 in outside of the upper and lower asymmetric raised circular bulge loop in both sides Individual sliding sleeve；The sliding sleeve of the upper and lower both sides it is cylindrical on be respectively equipped with annulus cam gear ring and lower annulus cam gear ring；It is described Second transition gear is engaged with the lower annulus cam gear ring, and the 3rd transition gear is nibbled with the upper annulus cam gear ring Close；The annulus inclined-plane of the upper annulus cam gear ring is identical for lead angle with the annulus inclined-plane of the lower annulus cam gear ring, The first oppositely oriented helicoid；The upper annulus cam gear ring and the lower annulus cam gear ring both sides are respectively equipped with overhead cam The annulus inclined-plane of disk and lower cam disc, the convex wheel disc and the lower cam disc is that lead angle is identical, oppositely oriented the Two helicoids, contact surface between the convex wheel disc and the upper annulus cam gear ring is oppositely oriented, lead angle is identical, institute State that contact surface between lower cam disc and the lower annulus cam gear ring is oppositely oriented, lead angle is identical；The lower cam disc Elastic packing back-up ring is provided between the dividing plate；The positioning datum adjustment system includes first group of adjustment mechanism and second group Adjustment mechanism, first group of adjustment mechanism includes gear shaft, and the gear shaft is arranged on the main frame body and through institute State and stretch in the housing outside upper cover body, main frame body and the lower cover of housing, one end of the gear shaft, the overhanging end is prism Shape, the gear shaft is provided with annular groove, the main frame body is provided with lock-screw, the lock-screw by a tapped through hole End withstand in the annular groove on the gear shaft, between the convex wheel disc and the housing be provided with sliding sleeve gear, it is described Connecting key is provided between the outer surface of the inner surface of sliding sleeve gear and the convex wheel disc；First adjustment mechanism is by rotating The gear shaft, axial movement of the convex wheel disc along its own described in final adjustment；Second adjustment mechanism and described first The relatively described main frame body of adjustment mechanism is mirror up and down, under the second adjustment mechanism final adjustment cam disc along its own Axial movement；The endoporus port of sliding sleeve gear at upper and lower two in housing is equipped with spring retainer back-up ring.

Further：

In the present invention, kept off between the upper surface of the main frame body circle convex platform and the inwall of convex wheel disc provided with elastic packing Circle.

The cylindrical external gear is structure as a whole with the tool-post structure.

The cylindrical external gear is Split type structure with the tool-post structure, and the cylindrical external gear is provided with shock relieve vent.It is described The outer wall of tool-post structure, which is provided with, is used for the connecting portion that is connected with the cylindrical external gear, the structure of the connecting portion be the shaft shoulder or It is multiple in circumference to uniform lug, be bolted between the cylindrical external gear and connecting portion.The cylindrical external gear Being provided with is used for the space for the two ends shaft shoulder and bevel pinion and the stop nut for accommodating the cutter shaft.

First cutlery is cylindrical cutlery, and the helical angle ω 1 of a plurality of spiral line type cutting edge is identical, the cylindrical sword Diameter D1, the cutting edge quantity n1 of tool and helical angle ω 1 relation are as follows：

The geometric parameter of first cutlery cutting edge includes width e, the value of the parameter after anterior angle α, sword thickness f, dorsal horn σ and sword The relation of scope and spot welding object material is as follows：

Second cutlery is arc surfaced cutlery, during the surface of the arc surfaced cutlery is outer convex globoidal or inner concave arc surface One kind；The cambered surface radius of welding tip side of the cambered surface radius of the arc surfaced cutlery with intending cutting reconditioning matches； The arc surfaced cutlery includes several geometry identical cutting edges；It is big that the physical dimension of the arc surfaced cutlery includes cutlery Hold diameter D2, cutlery end diameter D3 and cutting edge quantity n2；The span of the physical dimension and the electrode for intending cutting reconditioning Diameter R and the second cutlery cutting edge helical angle ω 2 relation are as follows：

Second cutlery is truncated cone-shaped cutlery, the cone angle of the truncated cone-shaped cutlery and the welding tip for intending cutting reconditioning The cone angle of side matches；The truncated cone-shaped cutlery includes several geometry identical cutting edges；The truncated cone-shaped cutlery Physical dimension includes cutlery outside diameter D2, cutlery end diameter D3 and cutting edge quantity n3；The span of the physical dimension The relation of electrode diameter R and the second cutlery cutting edge back rake angle ε with intending cutting reconditioning are as follows：

The geometric parameter of the second cutlery cutting edge includes the thick dorsal horn θ of anterior angle λ, dorsal horn δ, sword thickness b and sword；The anterior angle λ, Dorsal horn δ, sword thickness b and the thick dorsal horn θ of sword relation are as follows：

Compared with prior art, the beneficial effects of the invention are as follows：

(1) because combination cutlery is different to the cutting reconditioning principle on electrode surface to be repaired, known technology has been inherently eliminated it It is middle because operation principle formation all kinds of negative attributes.

(2) due to the lead angle formed after being processed in the absence of known technology to electrode surface, and using under micro- bite Positioning move cutting way reconditioning electrode, limit the uneven angle value of electrode working surface, the electrode working surface after reconditioning is uneven The depth of parallelism between angle value and electrode surface and workpiece surface can be improved more than 1 order of magnitude, be conducive to series spot welding process The stabilization of middle quality of welding spot.

(3) because cutting force sets up unrelated with electrode pressure, in the absence of the flank edge inboard that axial portions are passed through in known technology The anti-sword cutting that mouth necessarily occurs and the great phenomenon of impact load that cutting edge outer rim is born, and share more known skill by many cutting edges The smaller cutting stress of art, can effectively improve the working life of cutlery cutting edge, and the use cost of cutlery is only the ten of known technology Less than/mono- or lower.

(4) the actual reconditioning quality on electrode surface to be repaired is effectively reduced with the displacement accuracy control of coping device reference plane Excessive cutting to electrode, the effective rate of utilization of electrode material can improve more than 50%.

(5) because the utilization rate of electrode material is improved, reducing under the conditions of electrode changes number of times more than 50%, same process to have Effect improves technique production capacity.

(6) because the grinding quality of electrode working surface obtains effective guarantee, quality of welding spot can be effectively improved.

Brief description of the drawings

Fig. 1 is the 3 d effect graph that either simplex of the present invention makees termination electrode automatic grinding device；

Fig. 2 is the front view of electrode automatic grinding device surface structure of the present invention；

Fig. 3 is the left view of electrode automatic grinding device surface structure of the present invention；

Fig. 4 is the top view of electrode automatic grinding device surface structure of the present invention；

Fig. 5 be electrode automatic grinding device of the present invention without cover lid when main frame body upward view；

Fig. 6 be electrode automatic grinding device of the present invention without cover lid when main frame body side view；

Fig. 7 be electrode automatic grinding device of the present invention without cover lid when main frame body top view；

Fig. 8 is the sectional view of A-A slice locations in Fig. 4；

Fig. 9 is the sectional view of B-B slice locations in Fig. 4；

Figure 10-1 is the front sectional view of the split type knife rest of electrode automatic grinding device of the present invention；

Figure 10-2 is the top view of knife rest shown in Figure 10-1；

Figure 10-3 is the left view sectional view of knife rest shown in Figure 10-1；

Figure 11-1 is the front sectional view of monolithic knife rack in electrode automatic grinding device of the present invention；

Figure 11-2 is the side view of knife rest shown in Figure 11-1；

Figure 12-1 is the front sectional view of monolithic blade support body in electrode automatic grinding device of the present invention；

Figure 12-2 is the side view of tool-post structure shown in Figure 12-1；

Figure 13-1 is the front sectional view of split type tool-post structure in electrode automatic grinding device of the present invention；

Figure 13-2 is the side view cutaway drawing of tool-post structure shown in Figure 13-1；

Figure 13-3 is the top view of tool-post structure shown in Figure 13-1；

Figure 14 is the front sectional view that electrode automatic grinding device arc surfaced of the present invention combines cutlery；

Figure 15 is the front sectional view that electrode automatic grinding device truncated cone-shaped of the present invention combines cutlery；

Figure 16-1 is the end direction view of cylinder cutlery in electrode automatic grinding device of the present invention；

Figure 16-2 is the axial sectional view of cylinder cutlery shown in Figure 16-1；

Figure 16-3 is the dimensional structure diagram of cylinder cutlery shown in Figure 16-1；

Figure 17-1 is the axial sectional view of circular arc cutlery in electrode automatic grinding device of the present invention；

Figure 17-2 is the end direction view of circular arc cutlery shown in Figure 17-1；

Figure 17-3 is the axial sectional view of round platform cutlery in electrode automatic grinding device of the present invention；

Figure 17-4 is the end direction view of round platform cutlery shown in Figure 17-3；

Figure 18 is the structure chart of the second cutlery cutting edge thin portion geometry in electrode automatic grinding device of the present invention；

Figure 19 be in Fig. 9 second and third transition gear of the cutting displacement mobile system of electrode automatic grinding device shown in K respectively with The partial sectional view of upper and lower annulus cam gear ring meshing relation.

Figure 20 is electrode automatic grinding device cutting system transition gear shown in C and rotary power input in tool-post structure in Fig. 5 The broken section enlarged drawing of gearing relationships；

Figure 21-1 is the end direction view of upper annulus cam gear ring in the present invention；

Figure 21-2 is the side view of upper annulus cam gear ring shown in Figure 21-1；

Figure 21-3 is the top view of upper annulus cam gear ring shown in Figure 21-1；

Figure 21-4 is the dimensional structure diagram of upper annulus cam gear ring shown in Figure 21-1；

Figure 22-1 is the end direction view of convex wheel disc in the present invention；

Figure 22-2 is the side view of convex wheel disc shown in Figure 22-1；

Figure 22-3 is the top view of convex wheel disc shown in Figure 22-1；

Figure 22-4 is the dimensional structure diagram of convex wheel disc shown in Figure 22-1；

Figure 23-1 is upper annulus cam gear ring and convex wheel disc relative position state diagram one；

Figure 23-2 is upper annulus cam gear ring and convex wheel disc relative position state diagram two.

In figure：

1- upper covers, 2- main frame bodies, 3- lower cover lids, 4,6 gear shafts, 5- lock-screws, 7- reductors, 8- servomotors, 9- rotary power alternating current generators, 10,13- bolts, 11- cylinder cutleries, 12- arc surfaceds cutlery or truncated cone-shaped cutlery, 14- is convex Wheel disc, 15- spring retainer back-up rings, 16- power input gears, the transition gears of 171- second, the transition gears of 172- the 3rd, 18- connection Connect key, 19- sliding sleeve gears, 21- First Transition gears, 22- rotary power input gear axles, the upper annulus cam gear rings of 23-, 24- Sliding sleeve, 25- cylindrical external gears, 26- tool-post structures, 27- cutter shafts, the angular contact ball bearings of 281- first, 282- the second angular contact ball axles Hold, 29- bevel gear wheels, annulus cam gear ring under 30-, 31- bolts, 32- dividing plates, 33- elastic packing back-up rings, cam disc under 34-, 35- bevel pinions, the rolling bearing assemblies of 361- first, the rolling bearing assemblies of 362- second, 37- stop nuts, 38- bearing pins, 39- Bolt, 40- rotating shafts.

Embodiment

The present invention is on being exclusively used in during spot-welding technology to linear motion-type electrode including auto soldering tweezerses, weldering manually The electrode of pincers and fixed spot welder carries out the coping device of automatic grinding.The electrode automatic grinding device of the present invention is in electrode dressing mistake It is to realize accurately to control electrode dressing amount with the cutting way for determining Bit andits control by micro- bite in journey；It is to be repaired to electrode Cutting edge velocity of displacement of cutting the reconditioning speed or bite of working surface from electrode surface to be repaired to cutlery is determined, and electrode is treated The preset program that the velocity of displacement towards cutting edge of repairing watch is controlled by coping device all the time during electrode dressing.Cutlery is to electrode Revolution+rotation form work is taken during reconditioning, the axis of rotation that it revolves round the sun is using electrode axis as axle, i.e., with two angular contact ball axles The line for holding axle center is axle, and the axis of rotation of rotation then remains vertical with electrode axis；Micro- bite and positioning move control The electrode dressing mode of system drastically reduces cutting stress of the cutlery cutting edge during electrode dressing, the revolution formed in addition The cutwork mode of+rotation allows cutlery to be fabricated to many cutting edge cutleries by revolution section shape, and makes the cutting edge of cutlery Obtain more sharp keen；Above-mentioned a series of measures, making the electrode automatic grinding device of the present invention has more preferable grinding quality, more to electrode Low electrode material consumption and longer cutlery service life, so that butt welding point Quality advance and reduction spot-welding technology cost etc. Aspect produces actively impact.

The present invention is for the inventive concept of automatic grinding device of lifetime of resistance spot welding electrode：

(1) basic condition cut under the conditions of micro- bite the positioning shifting of welding tip face is set up.By using cutting Displacement mobile system, using the accurate angle sorting control characteristic of servo electrode, by larger reduction ratio speed reduction and annulus cam Small lift angle relation between gear ring and cam disc, makes the cam disc outer surface position axially movable as cutting positioning reference plane Move precision to improve by the order of magnitude, be that reliable implementation condition has been established in micro- bite positioning shifting cutting.

(2) by changing operation principle of the cutlery during electrode dressing, both the cutlery for many cutting edges was used and improved The sharp keen degree of cutlery cutting edge creates implementation condition, also the cutting stress wound for further reduction cutlery during electrode dressing Necessary condition is made.

(3) by combining structure combination form of the cutlery in coping device knife rest, combination cutlery is realized in electrode dressing During revolution+high speed rotation working method.

(4) used while by abovementioned technology in coping device, realize and ensure electrode surface grinding quality, reduce Electrode material consumes, reduces spot-welding technology cost and improved the purpose of quality of welding spot with cutlery.

Technical solution of the present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, described is specific Only the present invention is explained for embodiment, is not intended to limit the invention.

A kind of automatic grinding device for lifetime of resistance spot welding electrode proposed by the present invention, including main frame body 2, cutting system, cut Cut displacement mobile system and positioning datum adjustment mechanism.

As shown in Figures 1 to 7, the main frame body 2 is integral formula part, and the middle part of main frame body 2 is irregular shape face Entire body gusset；One end of the gusset of main frame body 2 is provided with external diameter is identical and upper and lower both sides are asymmetric raised circular convex Ring；The shaft shoulder mating holes coordinated with the truncated cone-shaped shaft shoulder of bevel gear wheel in knife rest 29 is issued on the inside of the upper circular bulge loop； The upper end of the main frame body 2 is fixed with upper cover 1, and the lower end of the main frame body 2 is fixed with lower cover lid 3；The upper cover 1, master Support body 2 and lower cover lid 3 constitute a housing.

Fig. 1 is into Fig. 7, and upper cover 1, main frame body 2 and the closed combination of lower cover lid 3 are assembled together, and collectively form the present invention The housing of electrode automatic grinding device；Wherein, upper cover 1 only plays sealing and dustproof effect in the structure；Lower cover lid 3 removes sealing and dustproof Effect is outer, and its lower surface is simultaneously as servomotor 8 in cutting displacement mobile system and its sub-assembly of reductor 7 and cutting The installation base surface of rotary power alternating current generator 9 in system；Main frame body 2 is the main body of electrode automatic grinding device of the present invention, except above-mentioned electricity Outside machine and reductor, it is placed in other mechanisms, part, component and the part of coping device business relationship etc. in it.

As shown in Figures 1 to 9, the cutting displacement mobile system includes being driven successively by a rotary power alternating current generator 9 Rotary power input gear 22, First Transition gear 21, the bearing of First Transition gear 21 and the circle by bevel gear wheel 29 The platform shape shaft shoulder is assemblied in the knife rest in the shaft shoulder mating holes of the upper circular bulge loop of main frame body 2；Such as Figure 10-1, Figure 10-2 and figure Shown in 10-3, the knife rest includes tool-post structure and combination cutlery, and the combination cutlery includes cutter shaft 27, one end of the cutter shaft 27 Bevel pinion 35 is fixed with, is fixed between the bevel pinion 35 and the cutter shaft 27 using bearing pin 38, on the cutter shaft 27, from The other end of the bevel pinion 35 to the cutter shaft 27 is sequentially provided with the first rolling bearing assembly 361, the first cutlery 11, second Cutlery 12, the second rolling bearing assembly 362, packing ring 371 and locking nut 372；The shape of cross section of first cutlery 11 is circle Shape and the cutting edge with a plurality of spiral line type, when first cutlery 11 rotates, the profile traces of cutting edge revolution are repaiied with intending cutting The welding tip plane of mill matches；The shape of cross section of second cutlery 12 is not all different-diameter according to slice location There is a plurality of cutting edge on circle, the outer surface of second cutlery 12, when second cutlery 12 rotates, the profile of cutting edge revolution The trajectory of welding tip side of the trajectory with intending cutting reconditioning is coincide；The tool-post structure 26 is a cylinder, the knife rest Body 26 is provided with the cylindrical external gear 25 (i.e. the input gear of knife rest rotary power) engaged with the First Transition gear 21, such as Shown in Figure 20；The both sides side wall of the tool-post structure 26 is provided with the bearing hole intersected vertically with cylinder center axially bored line, cylinder A coffin is provided with centre bore, the side wall of the coffin cuts with the inwall in the hole and handed over, the coffin be more than with Shared space when the first cutlery 11 and the second cutlery 12 are turned round in the combination cutlery；The top and bottom of the cylinder are all provided with Have to be equipped with the shaft shoulder, the upper end shaft shoulder at the first angular contact ball bearing 281, the lower end shaft shoulder and be equipped with the second angular contact ball bearing 282, a bevel gear wheel 29 is equipped with the outer shroud of first angular contact ball bearing 281；The combination cutlery is arranged on institute State on tool-post structure 26, the first rolling bearing assembly 361 and the second rolling bearing assembly 362 of the combination cutlery pass through bearing Outer shroud coordinates with the bearing hole on the both sides side wall of tool-post structure 26 to be assembled, the first cutlery 11 and the second sword of the combination cutlery Tool 12 is located in the coffin, and the bevel pinion 35 is engaged with the bevel gear wheel 29；The knife rest by filling thereon The shaft shoulder for the bevel gear wheel 29 matched somebody with somebody coordinates with the shaft shoulder hole at the circular bulge loop of the main frame body 2 to be assembled, under the knife rest Dividing plate 32 is fixed on main frame body 2 by end by bolt 31；The knife rest passes through the shaft shoulder of the bevel gear wheel 29 and described logical Cross the realization of dividing plate 32 and the combination of tool-post structure 2 that bolt 31 is fixedly mounted on main frame body 2；Dividing plate 32 mainly has two functions： First, the assembly of the outer shroud of the second angular contact ball bearing 282 as the bottom of tool-post structure 26；Second, with bolt 31 by dividing plate 32 After being fixedly mounted on main frame body 2, sliding sleeve 24 in the course of work can be limited and move downward because Action of Gravity Field is issuable Gesture.

Cutting system is one of important support system of electrode automatic grinding device realization principle innovation of the present invention, cutting system System is by the work of following describing mode：

After rotary power alternating current generator 9 starts, by rotary power input gear 22, First Transition gear 21 and knife rest Cylindrical external gear 25 communicate rotational motion to knife rest；The knife rest takes the combination cutlery with two angular contact ball bearings The axis that (281 and 282) axial connecting line is established rotates for axle, and constitutes the public affairs of combination cutlery cutlery during electrode dressing Turn；Due to there is meshing relation between the bevel gear wheel 29 on knife rest and the bevel pinion 35 for combining cutlery shaft end, cutlery is combined In with knife rest process of revolution, by according to the gear ratio relation between bevel gear wheel 29 and bevel pinion 35, amplify bevel pinion 35 around its own axis rotating speed；Again because cylindrical cutlery 11 and arc surfaced cutlery or truncated cone-shaped cutlery 12 and bevel pinion 35 are equal The coaxial tandem compound on axle 27, thus also drive simultaneously and be exaggerated the combination of above-mentioned cutlery with axle 27 around its own axis synchronization High speed rotation, forms high speed rotation of the combination cutlery during electrode dressing.By said process, establish combination cutlery and exist The working characteristics of revolution+high speed rotation during electrode dressing.

As shown in Figures 1 to 9, the cutting displacement mobile system includes the reductor driven successively by a servomotor 8 7th, power input gear 16 and the second transition gear 171 engaged with the power input gear 16；The servomotor 8 and institute The bottom that decelerator 7 is arranged at the housing is stated, the output shaft of the reductor 7 is penetrated to housing and in the assembling of its shaft end The power input gear 16, the rotating shaft of second transition gear 171 is arranged on the gusset of the main frame body 2, described dynamic The transition gear 171 of power input gear 16 and second is respectively positioned on below the gusset, the rotating shaft of second transition gear 171 Above and above the connecting plate it is provided with and the transition gear 172 of the second transition gear identical the 3rd；The body frame The gusset top external diameter of body 2 is identical and upper and lower both sides be asymmetric raised circular bulge loop outside 1 sliding sleeve 24 of each fixing assembling, As shown in figure 19；The sliding sleeve 24 of the upper and lower both sides it is cylindrical on be respectively equipped with annulus cam gear ring 23 and lower annulus cam Gear ring 30；Second transition gear 171 is engaged with the lower annulus cam gear ring 30, the 3rd transition gear 172 and institute Annulus cam gear ring 23 is stated to engage；As shown in Figure 21-1, Figure 21-2, Figure 21-3 and Figure 21-4, the upper annulus cam gear ring 23 upper surface is the first identical, oppositely oriented helicoid of lead angle with the lower surface of the lower annulus cam gear ring 30 231；As shown in Figure 8 and Figure 9, the upper annulus cam gear ring 23 and the lower both sides of annulus cam gear ring 30 are respectively equipped with convex Wheel disc 14 and lower cam disc 34, as shown in Figure 22-1, Figure 22-2, Figure 22-3 and Figure 22-4, the convex wheel disc 14 and it is described under The card of cam disc 34 is the second helicoid 141, connecing between the convex wheel disc 14 and the upper annulus cam gear ring 23 Contacting surface is oppositely oriented, lead angle is identical, i.e., matched between two contact surfaces, as shown in Figure 23-1 and Figure 23-2, it is described under Contact surface between cam disc 34 and the lower annulus cam gear ring 30 is oppositely oriented, lead angle is identical, is also two contacts Matched between face.

Cutting displacement mobile system is another important support system of electrode automatic grinding device realization principle innovation of the present invention System, cutting displacement mobile system works by following describing mode：

Cutting displacement mobile system includes successively since power source：Servomotor 8, reductor 7, power input gear 16th, the transition gear 17 of the same both sides shaft end of rotating shaft 40 assembling；Two transition gears 17 respectively undertake side cutting displacement travel mechanism Power transmission.Wherein, the transition gear 17 in the gusset top of main frame body 2 is nibbled with the gear in upper annulus cam gear ring 23 Close；In the upper rotary course of annulus cam gear ring 23, the annulus cam portion of its annulus cam portion and convex wheel disc 14, which is constituted, to be slided Dynamic matching pair；Due to restriction effect of a pair of keys 18 to the formation rotary motion of convex wheel disc 14, for upper annulus cam gear ring 23 Rotary motion, convex wheel disc 14 can only change the secondary lift of formed cam work according to the upper corner of annulus cam gear ring 23 Axially movable.Because servo electrode 8 segments step angle very little, from larger reduction ratio speed reduction 7, the supreme circle of power input gear 16 Decelerating effect step by step between ring convex wheel gear ring 23, goes up small lift angle annulus between annulus cam gear ring 23 and convex wheel disc 14 in addition A series of matching relationship of cam ramp etc., key elements facilitate the rotation of correspondence servomotor 8 jointly, and convex wheel disc 14 is by above-mentioned total Speed reducing ratio relation is slowly moved vertically.Because in the course of work, the outer surface of convex wheel disc 14 is also simultaneously Top electrode reconditioning When positioning reference plane, its low-speed motion speed vertically is also equal to electrode surface to be grinding to the close of coping device cutting edge Speed；Controlled by the corner to servomotor 8 per task, it is possible to realize the displacement control to convex wheel disc 14 vertically System, is also achieved that the positioning to Top electrode moves the purpose of reconditioning；And with convex wheel disc 14, speed is corresponding then axially movable Cutting speed when being electrode dressing；It is also that the present invention is repaiied with the cutlery corresponding axial displacement of convex wheel disc 14 that turned around per public affairs Grinder issuable inclination maximum in theory when cutting electrode surface；It is by the convex edge of wheel disc 14 during due to programming When axially moving to each reconditioning cutting limit position, cutlery will continue to revolve round the sun some turns, therefore above-mentioned theory machining inclination angle exists During virtual electrode reconditioning and be not present, thus realize cutting is moved to upper electrode surface positioning while, make electrode working surface Flatness and the depth of parallelism etc. of electrode working surface and workpiece surface ensured in the lump.

The power delivery mode of opposite side cutting displacement mobile system with it is above-mentioned identical, including be placed in the muscle of main frame body 2 The transition gear 17 of plate bottom, lower annulus cam gear ring 30, a pair of keys 18 and lower cam disc 34.Except the lower He of annulus cam gear ring 30 It is in mirror image between the lift angle and the overhead cam gear ring 23 and the lead angle of convex wheel disc 14 on the lower cam inclined-plane of cam disc 34 Outside relation, the other parts of each design of part are identical；When same 8 rotary work of input power servomotor, under it is convex The surface of wheel disc 34 is identical with the movement velocity on the convex surface of wheel disc 14, but the direction of motion is opposite.Realized with this to lower electrode surface Positioning move cutting.

The above-mentioned course of work of cutting displacement mobile system makes to be placed in the reference planes of the upper and lower cam disc in both sides (14 and 34) Equipotential moves move toward one another, that is, ensures the reconditioning equal length to two lateral electrode working surfaces.

In the present invention, elastic packing back-up ring 33, such as Fig. 8 and Fig. 9 are provided between the lower cam disc 34 and the dividing plate 32 It is shown.

As shown in Figures 1 to 9, in the present invention, the positioning datum adjustment mechanism includes first group of adjustment mechanism and second Group adjustment mechanism, first group of adjustment mechanism includes gear shaft 4, and the gear shaft 4 is arranged on the main frame body 2 and passed through It is through at outside upper cover body 1, main frame body 2 and the lower cover 3 of the housing, one end of the gear shaft 4 and stretches in the housing, this is overhanging Hold as prism-shaped, the gear shaft 4 is provided with annular groove, the main frame body 2 is provided with lock-screw 5 by a tapped through hole, The end of the lock-screw 5 is withstood in the annular groove on the gear shaft 4, is set between the convex wheel disc 14 and the housing There is sliding sleeve gear 19, connecting key 18 is provided between the inner surface of the sliding sleeve gear 19 and the outer surface of the convex wheel disc 14； If main frame body 2 is made from the steel of the softer material of quality or modifier treatment, in order to increase main frame body 2 and upper and lower annulus The wearability of main frame body 2 during cam gear ring (23 and 30) cooperating, preferably in main frame body 2 and upper and lower cam circle annular gear (23 And 30) sliding sleeve 24 is respectively set between two matching pairs；The inner ring of the sliding sleeve 24 is respectively assembled at interference fit On the outer shroud of the upper and lower circular bulge loop of main frame body 2, upper and lower annulus cam gear ring is respectively assembled on the outer shroud of two sliding sleeves 24, work When friction substitution with upper and lower annulus cam gear ring (23 and 30) respectively between a mating annular face of sliding sleeve 24 is former and body frame Friction between the circular bulge loop outer surface of body 2；First adjustment mechanism is by rotating the gear shaft 4, described in final adjustment Axial movement of the convex wheel disc 14 along its own；Second adjustment mechanism main frame body relative with first adjustment mechanism 2 be mirror up and down, second adjustment mechanism by turning gear wheel shaft 6, under final adjustment cam disc 34 along its own Axial movement；As shown in Figures 2 to 7.

The positioning datum adjustment mechanism is for manually adjusting mechanism used during coping device initial alignment benchmark, main mesh Be to improve electrode material utilization.

The endoporus port of sliding sleeve gear 19 at upper and lower two in housing is equipped with spring retainer back-up ring 15.It is described Elastic packing back-up ring can also be provided between the circular bulge loop upper surface of main frame body 2 and the inner surface of convex wheel disc 14.

As shown in Figure 12-1 and Figure 12-2, in the present invention, the cylindrical external gear 25 is integrated knot with the tool-post structure 26 Structure.Figure 11-1 and Figure 11-2 shows the knife rest of integral structure.

As shown in Figure 13-1, Figure 13-2 and Figure 13-3, the cylindrical external gear 25 is Split type structure with the tool-post structure 26, The outer wall of the tool-post structure 26 is provided with the connecting portion for being used for being connected with the cylindrical external gear 25, and the structure of the connecting portion is The shaft shoulder or it is multiple in circumference to uniform lug, connected between the cylindrical external gear 25 and connecting portion by bolt 39, institute State cylindrical external gear 25 and be provided with the space for being used for accommodating the cutter shaft 27 and bevel pinion 35；Figure 10-1, Figure 10-2 and Figure 10- 3 show the knife rest of split-type structural.

As shown in Figure 16-1, Figure 16-2 and Figure 16-3, in the present invention, first cutlery 11 is cylindrical cutlery, a plurality of The helical angle ω 1 of spiral line type cutting edge is identical, diameter D1, the cutting edge quantity Z=n1 of the cylindrical cutlery and helical angle ω's 1 Relation is as follows：

The geometric parameter of the cutting edge of first cutlery 11 includes width e after anterior angle α, sword thickness f, dorsal horn σ and sword, and the parameter takes The relation for being worth scope and spot welding object material is as follows：

As shown in Figure 14, Figure 17-1 and Figure 17-2, in the present invention, second cutlery 12 is arc surfaced cutlery, the arc The surface of face shape cutlery is one kind in outer convex globoidal or inner concave arc surface；The cambered surface radius of the arc surfaced cutlery is cut with intending The cambered surface radius of the welding tip side of reconditioning matches；The arc surfaced cutlery includes several geometry identical swords Mouthful；The physical dimension of the arc surfaced cutlery includes cutlery outside diameter D2, cutlery end diameter D3 and cutting edge quantity Z=n2； Electrode diameter R and the second cutlery cutting edge helical angle ω 2 of the span of the physical dimension with intending cutting reconditioning pass System is as follows：

As shown in Figure 15, Figure 17-3 and Figure 17-4, in the present invention, second cutlery 12 is truncated cone-shaped cutlery, the circle The cone angle of welding tip side of the cone angle of platform shape cutlery with intending cutting reconditioning matches；The truncated cone-shaped cutlery includes number Individual geometry identical cutting edge；The physical dimension of the truncated cone-shaped cutlery includes cutlery outside diameter D2, cutlery end diameter D3 and cutting edge quantity Z=n3；The span of the physical dimension and the electrode diameter R and second cutlery for intending cutting reconditioning Cutting edge back rake angle ε relation is as follows：

As shown in figure 18, in the present invention, the geometric parameter of the cutting edge of the second cutlery 12 includes anterior angle λ, dorsal horn δ, sword thickness b With the thick dorsal horn θ of sword；The thick dorsal horn θ of the anterior angle λ, dorsal horn δ, sword thickness b and sword relation is as follows：

Also include following part, the steady operation to assist a ruler in governing a country each functional system and mechanism, bag in coping device of the present invention Include：

(1) the elastic packing back-up ring 33 as shown in Fig. 8 or Fig. 9；Fig. 8 is to be respectively arranged with elastic packing gear up and down in structure The structural shape of circle 33, Fig. 9 is only bottom fills the structural shape of an elastic packing back-up ring 33 in structure；Elastic packing back-up ring 33 function is that chip when preventing electrode dressing is entered in the chamber of each power transmission of coping device, so as to each power transmission The rotary state formation adverse effect of system；Chip during due to electrode grinding device is leaked from bottom, therefore can also use Fig. 9 The structural shape of shown single elastic packing back-up ring 33.

(2) the spring retainer back-up ring 15 as shown in Fig. 4, Fig. 5, Fig. 7 to Fig. 9；The effect of spring retainer back-up ring 15 is anti- Only convex wheel disc 14 and lower cam disc 34 come off from coping device main frame body 2；After coping device is installed in place, if convex wheel disc 14 When being in lower work posture with lower cam disc 34, it is allowed to do not install the spring retainer back-up ring 15 in portion.

The power of electrode grinding device cutting displacement mobile system of the present invention is servomotor 8, is considered from manufacturing cost, the electricity Machine also replace by available step motor.

The electric control system of electrode automatic grinding device of the present invention can select single-chip microcomputer to control, and PLC can also be selected to control System；If the communication between group control system pair and coping device on production line claims, PLC must be selected to control.

Electrode automatic grinding device of the present invention using a variety of inductors in production in use, control the automatic of coping device to open Stop, the start and stop that hand switch controls coping device can also be used.

One end of electrode grinding device main frame body 2 of the present invention is used for mounting hole when coping device is installed for prefabricated 4, can basis Manufacturing technique requirent is rack-mount or basal plane of other stabilizations on.

To sum up, instant invention overcomes in the prior art because above-mentioned produced by the reasons such as structure ＆ working mechanism attribute is asked Topic.The knife rest set up by cutting system takes the working method of combination cutlery rotation, it is thus identified that electrode automatic grinding device of the present invention Combination cutlery during electrode dressing with the principle attribute of revolution+high speed rotation, and created for the use of multiple-cutting-edge cutlery Necessary condition；By the multiple-cutting-edge cutlery cutting edge more sharp keen and high-revolving work characteristics of cutlery, with reference to cutting displacement mobile system Accurate control to cutting displacement translational speed and mobile displacement, realizes and welding tip is determined under the conditions of micro- bite Displacement is cut.The implementation in the lump of abovementioned technology, not only effectively reduces the cutting stress of cutlery cutting edge, while improving sword The service life of tool；Due to the change of cutlery cutting edge cutting principle during electrode dressing, in the reconditioning of electrode working surface The aspects such as quality, electrode material consumption and quality of welding spot can also be obtained to produce effects very well.

Although above in conjunction with accompanying drawing, invention has been described, and the invention is not limited in above-mentioned specific implementation Mode, above-mentioned embodiment is only schematical, rather than restricted, and one of ordinary skill in the art is at this Under the enlightenment of invention, without deviating from the spirit of the invention, many variations can also be made, these belong to the present invention's Within protection.

Claims (10)

1. a kind of automatic grinding device for lifetime of resistance spot welding electrode, including main frame body (2), cutting system, cutting displacement movement system System and positioning datum adjustment mechanism；

The main frame body (2) is integral the entire body gusset for irregular shape face in the middle part of formula part, the main frame body (2)；It is described One end of main frame body (2) gusset is identical and upper and lower both sides are asymmetric raised circular bulge loop provided with external diameter；The top circle The shaft shoulder mating holes coordinated with bevel gear wheel in knife rest (29) truncated cone-shaped shaft shoulder is issued on the inside of shape bulge loop；The main frame body (2) upper end is fixed with upper cover (1), and the lower end of the main frame body (2) is fixed with lower cover lid (3)；The upper cover (1), master Support body (2) and lower cover lid (3) constitute a housing；

Rotary power input gear (22) that the cutting system includes being driven successively by a rotary power alternating current generator (9), the One transition gear (21) and the knife rest for being assemblied in the main frame body (2) shaft shoulder cooperation hole site；The knife rest include tool-post structure and Cutlery is combined, the combination cutlery includes cutter shaft (27), and one end of the cutter shaft (27) is fixed with bevel pinion (35), described small It is fixed using bearing pin (38) between bevel gear (35) and the cutter shaft (27), on the cutter shaft (27), from the bevel pinion (35) other end to the cutter shaft (27) is sequentially provided with the first rolling bearing assembly (361), the first cutlery (11), the second cutlery (12), the second rolling bearing assembly (362), packing ring (371) and locking nut (372)；First cutlery (11) cross section shape Shape is cutting edge circular and with a plurality of spiral line type, during the first cutlery (11) rotation, the profile traces of cutting edge revolution with The welding tip plane for intending cutting reconditioning matches；The shape of cross section of second cutlery (12) is not all according to slice location There is a plurality of cutting edge on the circle of different-diameter, the outer surface of second cutlery (12), during the second cutlery (12) rotation, The trajectory of welding tip side of the profile traces line of cutting edge revolution with intending cutting reconditioning is coincide；The tool-post structure (26) is One cylinder, the tool-post structure (26) is provided with the cylindrical external gear (25) engaged with the First Transition gear (21), the knife The both sides side wall of support body (26) is provided with the bearing hole intersected vertically with cylinder center axially bored line, the centre bore of cylinder and is provided with one Coffin, the side wall of the coffin is cut with the inwall in the hole and handed over, and the coffin is more than to be combined in cutlery with described Shared space when the first cutlery (11) and the second cutlery (12) revolution；The top and bottom of the cylinder are equipped with the shaft shoulder, on It is equipped with the shaft shoulder of end at the first angular contact ball bearing (281), the lower end shaft shoulder and is equipped with the second angular contact ball bearing (282), institute State to coordinate on the outer shroud of the first angular contact ball bearing (281) and a bevel gear wheel (29) is installed；The combination cutlery is arranged on On the tool-post structure (26), the first rolling bearing assembly (361) and the second rolling bearing assembly (362) of the combination cutlery are Coordinated by the bearing hole on outer race and tool-post structure both sides side wall and assembled, the first cutlery (11) of the combination cutlery It is located at the second cutlery (12) in the coffin, the bevel pinion (35) is engaged with the bevel gear wheel (29)；It is described Knife rest is coordinated by the shaft shoulder of the bevel gear wheel (29) one end assembled thereon with the shaft shoulder hole of the main frame body (2) to be assembled, Dividing plate (32) is fixed on main frame body (2) by the lower end of the knife rest by bolt (31)；The knife rest passes through the auger tooth The shaft shoulder and the dividing plate (32) being fixedly mounted on by bolt (31) on main frame body (2) for taking turns (29) are realized and tool-post structure (2) Combination；The axial connecting line of first angular contact ball bearing (281) and second angular contact ball bearing (282) is knife rest Axis of rotation in the course of work；

The cutting displacement mobile system includes reductor (7), the power input gear driven successively by a servomotor (8) (16) the second transition gear (171) and with the power input gear (16) engaged；The servomotor (8) and the deceleration The bottom of the housing is assemblied in after device (7) tandem compound, the power input gear (16) is assemblied in reducer output shaft and worn Enter the shaft end of enclosure interior, and engaged with the second transition gear (171) for being placed in main frame body (2) gusset bottom；Second mistake The rotating shaft (40) for crossing gear (171) is arranged on the gusset of the main frame body (2), the power input gear (16) and the second mistake Gear (171) is crossed to be respectively positioned on below the main frame body (2) gusset, in the rotating shaft (40) of second transition gear (171) and It is provided with and the transition gear (172) of the second transition gear identical the 3rd above the main frame body (2) gusset；It is described Main frame body (2) gusset top external diameter is identical and outside 1 cunning of each fixing assembling of the upper and lower asymmetric raised circular bulge loop in both sides Cover (24)；The sliding sleeve (24) of the upper and lower both sides it is cylindrical on be respectively equipped with annulus cam gear ring (23) and lower annulus cam Gear ring (30)；Second transition gear (171) is engaged with the upper annulus cam gear ring (23), the 3rd transition gear (172) engaged with the lower annulus cam gear ring (30)；The upper surface of the ring part of the upper annulus cam gear ring (23) and The lower surface of the ring part of the lower annulus cam gear ring (30) is the first identical, oppositely oriented helicoid of lead angle； The upper annulus cam gear ring (23) and the lower annulus cam gear ring (30) each both sides be respectively equipped with convex wheel disc (14) and The ring part of lower cam disc (34), the convex wheel disc (14) and the lower cam disc (34) is the second helicoid, described Contact surface between convex wheel disc (14) and the upper annulus cam gear ring (23) is oppositely oriented, lead angle is identical, it is described under Contact surface between cam disc (34) and the lower annulus cam gear ring (30) is oppositely oriented, lead angle is identical；

Elastic packing back-up ring (33) is provided between the lower cam disc (34) and the dividing plate (32)；

The positioning datum adjustment mechanism includes first group of adjustment mechanism and second group of adjustment mechanism, first group of adjustment mechanism Including gear shaft (4), the gear shaft (4) be arranged on upper cover body (1) on the main frame body (2) and through the housing, The housing is stretched in outside main frame body (2) and lower cover (3), one end of the gear shaft (4), the overhanging end is prism-shaped, described Gear shaft (4) is provided with annular groove, the main frame body (2) is provided with lock-screw (5), the lock by one tapped through hole of side The end of tight screw (5) is withstood in the annular groove on the gear shaft (4), is set between the convex wheel disc (14) and the housing There is sliding sleeve gear (19), be provided with and be connected between the inner surface of the sliding sleeve gear (19) and the outer surface of the convex wheel disc (14) Key (18)；First adjustment mechanism by rotating the gear shaft (4), convex wheel disc (14) described in final adjustment along its own Axial movement；Second adjustment mechanism main frame body (2) relative with first adjustment mechanism is mirror up and down, Axial movement of the cam disc (34) along its own under the second adjustment mechanism final adjustment；

The endoporus port of sliding sleeve gear (19) at upper and lower two in housing is equipped with spring retainer back-up ring (15).

2. it is used for the automatic grinding device of lifetime of resistance spot welding electrode according to claim 1, it is characterised in that the main frame body (2) Elastic packing back-up ring (33) is provided between the inwall of the upper surface of circle convex platform and convex wheel disc (14).

3. it is used for the automatic grinding device of lifetime of resistance spot welding electrode according to claim 1, it is characterised in that：The cylindrical external gear (25) it is structure as a whole with the tool-post structure (26).

4. it is used for the automatic grinding device of lifetime of resistance spot welding electrode according to claim 1, it is characterised in that the cylindrical external gear (25) it is Split type structure with the tool-post structure (26), the outer wall of the tool-post structure (26), which is provided with, to be used for and the cylindrical external gear (25) connecting portion of connection, the structure of the connecting portion be the shaft shoulder or it is multiple in circumference to uniform lug, outside the cylinder Gear (25) is bolted between connecting portion.

5. it is used for the automatic grinding device of lifetime of resistance spot welding electrode according to claim 4, it is characterised in that the cylindrical external gear (25) it is provided with shock relieve vent.

6. it is used for the automatic grinding device of lifetime of resistance spot welding electrode according to claim 5, it is characterised in that the cylindrical external gear (25) being provided with is used for the space of the two ends shaft shoulder and bevel pinion (35) with stop nut (37) for accommodating the cutter shaft (27).

7. it is used for the automatic grinding device of lifetime of resistance spot welding electrode according to claim 1, it is characterised in that first cutlery (11) it is cylindrical cutlery, the helical angle ω 1 of a plurality of spiral line type cutting edge is identical, diameter D1, the cutting edge of the cylindrical cutlery Quantity n1 and helical angle ω 1 relation are as follows：

The geometric parameter of the first cutlery (11) cutting edge includes width e, the value of the parameter after anterior angle α, sword thickness f, dorsal horn σ and sword The relation of scope and spot welding object material is as follows：

8. it is used for the automatic grinding device of lifetime of resistance spot welding electrode according to claim 1, it is characterised in that second cutlery (12) it is arc surfaced cutlery, the surface of the arc surfaced cutlery is one kind in outer convex globoidal or inner concave arc surface；The cambered surface The cambered surface radius of welding tip side of the cambered surface radius of shape cutlery with intending cutting reconditioning matches；

The arc surfaced cutlery includes several geometry identical cutting edges；The physical dimension of the arc surfaced cutlery includes sword Have outside diameter D2, cutlery end diameter D3 and cutting edge quantity n2；The span of the physical dimension is with intending cutting reconditioning Electrode diameter R and the second cutlery cutting edge helical angle ω 2 relation are as follows：

9. it is used for the automatic grinding device of lifetime of resistance spot welding electrode according to claim 1, it is characterised in that second cutlery (12) it is truncated cone-shaped cutlery, the cone angle kissing of welding tip side of the cone angle of the truncated cone-shaped cutlery with intending cutting reconditioning Close；

The truncated cone-shaped cutlery includes several geometry identical cutting edges；The physical dimension of the truncated cone-shaped cutlery includes sword Have outside diameter D2, cutlery end diameter D3 and cutting edge quantity n3；The span of the physical dimension is with intending cutting reconditioning Electrode diameter R and the second cutlery cutting edge back rake angle ε relation are as follows：

10. it is used for the automatic grinding device of lifetime of resistance spot welding electrode according to claim 8 or claim 9, it is characterised in that second sword Having the geometric parameter of (12) cutting edge includes the thick dorsal horn θ of anterior angle λ, dorsal horn δ, sword thickness b and sword；The anterior angle λ, dorsal horn δ, sword thickness b and Sword thickness dorsal horn θ relation is as follows：