CN207171204U - A kind of automatic grinding device for lifetime of resistance spot welding electrode - Google Patents

Abstract

The utility model 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；Rotary power input gear, First Transition gear and the knife rest for taking combination cutlery that cutting system includes being 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 engage with two side ring cam tooth circles 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 positioning of micro-cutting amount moves cutting reconditioning mode can obtain significant good effect to the product point quality in spot welding production and spot-welding technology cost etc..

Description

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

Technical field

The utility model is the special process equipment on welding electrode reconditioning during resistance spot welding process, more specifically Say, the utility model is the electrode on being exclusively used in linear motion-type soldering turret or fixed spot welder during resistance spot welding process Carry out the coping device of automatic grinding.

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, caused resistance heat also constantly re-starts heat again with the change of resistance allocation proportion relation between joint 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 substantive adverse effect, and regular reconditioning electrode working surface is taken in 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., The conductive surface diameter of electrode was limited in the electrode dressing phase twice and fluctuated, 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 and attachment 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. fluctuates in limited range, reduces the fluctuation of all kinds of welding interface conditions and mitigates the butt welding such as temperature field transfer Adversely affected caused by point mass.Manual coping device when using need to by the experience of people, 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, it 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 using electrode axis as gyroaxis, 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 determines 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, can not 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 the working method of rotation, i.e. cutting edge is tied up under very large electrode pressure effect to carry to start and increased to rotating speed by zero moment Maximum functional rotating speed is very big to the percussion of cutting edge；Third, from electrode external diameter to electrode axle center, the cutting linear velocity of cutting edge There is the change by V=Vmax to V=0, i.e. the cutting acceleration at electrode external diameter position and cutting linear velocity is 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, uniformity and conductive capability and cutting edge life-span to electrode surface electrode material etc. of tear superposition is deposited Necessarily negatively affecting；Fourth, in order to remove the metal to be cut of electrode axis part, it is contemplated that the electrode certainly existed repeats Positioning precision error and cutlery rotate the factors such as necessary fit clearance, axle center must be passed through in land length design, beyond axle The local cutting edge of the heart bears the bad working environments such as anti-sword cutting and hard squeeze in working angles, to cutting edge working life extremely not Profit；Fifth, resetting error precision will be to greatest extent using between cooperation by the skew at build-up of pressure center, Center of Pressure skew 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 relatively stable and quality of welding spot of area of section etc. fed to electrode form and adversely affect.

(3) cutting force is established 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 relative shift control when passing through reconditioning between electrode surface to be repaired 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.

Utility model content

For above-mentioned prior art, the utility model provides a kind of automatic grinding device for lifetime of resistance spot welding electrode, can With to the electrode of all kinds of linear motion-type mash welders carry out automatic grinding electrode automatic grinding device, including auto soldering tweezerses, manually Linear motion-type electrode in soldering turret or fixed mash welder.Electrode automatic grinding device of the present utility model is using multiple-cutting-edge combination sword Tool, positioning shifting reconditioning is carried out to welding tip face under the conditions of micro- bite, and cutlery cutting edge is repaiied to welding tip face The cutting force of mill establish it is unrelated with electrode pressure, except the working surface flatness after electrode dressing and electrode working surface can be improved The depth of parallelism between workpiece surface, and create more preferable basic guarantee bar effectively to reduce electrode material consumption and quality of welding spot Outside part, the service life of cutlery can be also effectively improved.

In order to solve the above-mentioned technical problem, the utility model proposes a kind of automatic grinding for lifetime of resistance spot welding electrode Device, including main frame body, cutting system, cutting displacement mobile system and positioning datum adjustment mechanism；The main frame body is integral Formula part, the main frame body middle part are the entire body gusset in irregular shape face；One end of the main frame body gusset be 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 auger tooth in knife rest Take turns 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 consolidated Surely there is lower cover lid；The upper cover, main frame body and lower cover lid form the complete housing of coping device；The cutting system is included by one Rotary power input gear, First Transition gear and the knife rest that rotary power alternating current generator drives successively, the knife rest lead to The shaft shoulder for crossing 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 Frame includes tool-post structure and combination cutlery, and the combination cutlery includes cutter shaft, and one end of the cutter shaft is fixed with bevel pinion, described Fixed between bevel pinion and the cutter shaft using bearing pin, it is another from the bevel pinion to the cutter shaft on the cutter shaft End 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； The first cutlery shape of cross section is cutting edge circular and with a plurality of spiral line type, when first cutlery rotates, cutting edge The profile traces of revolution match with intending the welding tip plane of cutting reconditioning；The shape of cross section of second cutlery is according to cuing open The circle that position is not all different-diameter is cut, there is a plurality of cutting edge, the second cutlery rotation on the outer surface of second cutlery When turning, 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 For a cylinder, the tool-post structure is provided with the cylindrical external gear engaged with the First Transition gear, the both sides of the tool-post structure Side wall is provided with the bearing hole to be intersected vertically with cylinder center axially bored line, and a coffin is provided with the centre bore of cylinder, described The side wall of coffin is cut with the inwall in the hole and handed over, and the coffin is more than combines the first cutlery and second in cutlery with described Cutlery space shared when turning round；The top and bottom of the cylinder are equipped with the shaft shoulder, and the first corner connection is equipped with the shaft shoulder of upper end Ball bearing is touched, the second angular contact ball bearing is equipped with the shaft shoulder of lower end, is equipped with the outer shroud of first angular contact ball bearing One bevel gear wheel；It is described combination cutlery be arranged on the tool-post structure on, it is described combination cutlery the first rolling bearing assembly and Second rolling bearing assembly is coordinated by the bearing hole on outer race and tool-post structure both sides side wall to be assembled, the combination The first cutlery and the second cutlery of cutlery are located in the coffin, and the bevel pinion engages with the bevel gear wheel；Institute State knife rest and assembling, the knife rest are coordinated with the main frame body shaft shoulder hole by the shaft shoulder of the described bevel gear wheel one end assembled thereon Lower end dividing plate is fixed on main frame body by bolt；The knife rest is by the shaft shoulder of the bevel gear wheel and described passes through spiral shell The dividing plate that bolt is fixedly mounted on main frame body realizes the combination with tool-post structure；First angular contact ball bearing and described second jiao The axial connecting line of contact ball bearing is the axis of rotation in the knife rest course of work；The cutting displacement mobile system is included by one Reductor, power input gear and the second transition gear engaged with the power input gear that servomotor drives successively； The servomotor and the reductor are arranged at the bottom of the housing, and it is defeated that the power input gear is assemblied in reductor Shaft penetrates the shaft end of enclosure interior, and the second transition gear with being placed in main frame body gusset bottom engages；Second transition It is provided with and the transition tooth of the second transition gear identical the 3rd in the rotating shaft of gear 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 disk, the convex wheel disc and the lower cam disk 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 disk and the lower annulus cam gear ring is oppositely oriented, lead angle is identical；The lower cam disk 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 include gear shaft, and the gear shaft is arranged on the main frame body and through institute The upper outlet body, main frame body and lower cover of housing are stated, the housing is stretched in outside one end of the gear shaft, the overhanging end is prism Shape, the gear shaft are provided with annular groove, and lock-screw, the lock-screw are provided with by a tapped through hole on the main frame body End withstand in the annular groove on the gear shaft, sliding sleeve gear is provided between the convex wheel disc and the housing, 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 group of adjustment mechanism is by turning Move the gear shaft, axial movement of the convex wheel disc along its own described in final adjustment；Second group of adjustment mechanism with it is described The relatively described main frame body of first group of adjustment mechanism is upper and lower mirror, second group of adjustment mechanism final adjustment lower cam disk Along the axial movement of its own；Spring retainer gear is equipped with the endoporus port of sliding sleeve gear at upper and lower two in housing Circle.

Further：

It is close that elasticity is provided with the utility model, between the upper surface of the main frame body circle convex platform and the inwall of convex wheel disc Block circle.

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

The cylindrical external gear and the tool-post structure are Split type 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 It is provided with the both ends shaft shoulder and the space of bevel pinion and stop nut for being used 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 after anterior angle α, sword thickness f, dorsal horn σ and sword, the value of the parameter The relation of scope and spot welding object material is as follows：

Second cutlery is arc surfaced cutlery, and the surface of the arc surfaced cutlery is in 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 anterior angle λ, dorsal horn δ, sword thickness b and sword thickness dorsal horn θ；The anterior angle λ, Dorsal horn δ, sword thickness b and sword thickness dorsal horn θ relation are as follows：

Compared with prior art, the beneficial effects of the utility model are：

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

(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 electrode working surface injustice angle value, electrode working surface after reconditioning is uneven The depth of parallelism between angle value and electrode surface and workpiece surface can improve more than 1 order of magnitude, be advantageous to series spot welding process The stabilization of middle quality of welding spot.

(3) because cutting force foundation is 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 more 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 can be reduced effectively 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 improves, reduce electrode and change number more than 50%, can have under the conditions of same process 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 the utility model either simplex makees termination electrode automatic grinding device；

Fig. 2 is the front view of the utility model electrode automatic grinding device surface structure；

Fig. 3 is the left view of the utility model electrode automatic grinding device surface structure；

Fig. 4 is the top view of the utility model electrode automatic grinding device surface structure；

Fig. 5 be the utility model electrode automatic grinding device without cover lid when main frame body upward view；

Fig. 6 be the utility model electrode automatic grinding device without cover lid when main frame body side view；

Fig. 7 be the utility model electrode automatic grinding device 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 the utility model electrode automatic grinding device；

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 the utility model electrode automatic grinding device；

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 the utility model electrode automatic grinding device；

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 the utility model electrode automatic grinding device；

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 of the utility model electrode automatic grinding device arc surfaced combination cutlery；

Figure 15 is the front sectional view of the utility model electrode automatic grinding device truncated cone-shaped combination cutlery；

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

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 the utility model electrode automatic grinding device；

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 the utility model electrode automatic grinding device；

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 the utility model electrode automatic grinding device；

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

Figure 20 is that the device cutting system transition gear of electrode automatic grinding shown in C inputs with rotary power 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 utility model；

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 utility model；

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- are 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 Meet 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, 34- lower cam disks, 35- bevel pinions, the rolling bearing assemblies of 361- first, the rolling bearing assemblies of 362- second, 37- stop nuts, 38- bearing pins, 39- bolts, 40- rotating shafts.

Embodiment

The utility model is on being exclusively used in during spot-welding technology to linear motion-type electrode including auto soldering tweezerses, hand The electrode of dynamic soldering turret and fixed spot welder carries out the coping device of automatic grinding.Electrode automatic grinding device of the present utility model is in electricity It is to realize accurately to control electrode dressing amount with the cutting way for determining Bit andits control by micro- bite during the reconditioning of pole；It is right Cutting edge velocity of displacement decision of cutting the reconditioning speed or bite of electrode working surface to be repaired from electrode surface to be repaired to cutlery, And electrode surface to be repaired is controlled by the preset program in coping device to the velocity of displacement of cutting edge all the time during electrode dressing.Sword Tool is to taking revolution+rotation form to work during electrode dressing, the axis of rotation that it revolves round the sun is using electrode axis as axle, i.e., with two angles The line in contact ball bearing axle center is axle, and the axis of rotation of rotation then remains vertical with electrode axis；Micro- bite and Determining the electrode dressing mode of Bit andits control drastically reduces cutting stress of the cutlery cutting edge during electrode dressing, in addition institute's shape Into the cutwork mode of revolution+rotation allow cutlery to be fabricated to more cutting edge cutleries by revolution section shape, and make cutlery Cutting edge is made to more sharp keen；Above-mentioned a series of measures, make electrode automatic grinding device of the present utility model that there is electrode more preferable Grinding quality, lower electrode material consumption and longer cutlery service life, so as to butt welding point Quality advance and reduction Spot-welding technology cost etc. produces actively impact.

The utility model is conceived for the utility model of the automatic grinding device of lifetime of resistance spot welding electrode：

(1) establish under the conditions of micro- bite and the basic condition cut is moved to the positioning of welding tip face.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, make the cam disc outer surface position axially movable as cutting positioning reference plane Move precision to improve by the order of magnitude, move cutting for the positioning of micro- bite and established reliable implementation condition.

(2) by changing operation principle of the cutlery during electrode dressing, both the cutlery for more cutting edges was used and improved The sharp keen degree of cutlery cutting edge creates implementation condition, is also created further to reduce cutting stress of the 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 and cutlery consumption, reduction spot-welding technology cost and the purpose for improving quality of welding spot.

Technical solutions of the utility model are described in further detail with specific embodiment below in conjunction with the accompanying drawings, it is described Only the utility model is explained for specific embodiment, not limiting the utility model.

The utility model proposes a kind of automatic grinding device for lifetime of resistance spot welding electrode, including main frame body 2, cutting system System, cutting 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 that 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.

Into Fig. 7, upper cover 1, main frame body 2 and the closed combination of lower cover lid 3 are assembled together Fig. 1, collectively form this practicality The housing of novel electrode automatic grinding device；Wherein, upper cover 1 only plays sealing and dustproof effect in the structure；Lower cover lid 3 is except sealing Outside dustproof effect, its lower surface as servomotor 8 and its sub-assembly of reductor 7 in cutting displacement mobile system and is cut simultaneously Cut the installation base surface of rotary power alternating current generator 9 in system；Main frame body 2 is the main body of the utility model electrode automatic grinding device, In addition to above-mentioned motor and speed reducer, 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, and the one of the cutter shaft 27 End is fixed with bevel pinion 35, is fixed between the bevel pinion 35 and the cutter shaft 27 using bearing pin 38, on the cutter shaft 27, The other end from the bevel pinion 35 to the cutter shaft 27 is sequentially provided with the first rolling bearing assembly 361, the first cutlery 11, Two cutleries 12, the second rolling bearing assembly 362, packing ring 371 and locking nut 372；The shape of cross section of first cutlery 11 is Cutting edge circular and with a plurality of spiral line type, when first cutlery 11 rotates, the profile traces of cutting edge revolution are cut with intending The welding tip plane of reconditioning matches；The shape of cross section of second cutlery 12 is not all different-diameter according to slice location Circle, there is on the outer surface of second cutlery 12 a plurality of cutting edge, when second cutlery 12 rotates, cutting edge revolution The trajectory of welding tip side of the profile traces line with intending cutting reconditioning is coincide；The tool-post structure 26 is a cylinder, described Tool-post structure 26 is provided with (the i.e. input tooth of knife rest rotary power of cylindrical external gear 25 engaged with the First Transition gear 21 Wheel), as shown in figure 20；The both sides side wall of the tool-post structure 26 is provided with the bearing hole to be intersected vertically with cylinder center axially bored line, A coffin is provided with the centre bore of cylinder, the side wall of the coffin is cut with the inwall in the hole and handed over, the coffin More than with it is described combine that the first cutlery 11 and the second cutlery 12 turn round in cutlery when shared space；The upper end of the cylinder is with End is equipped with the shaft shoulder, and the first angular contact ball bearing 281 is equipped with the shaft shoulder of upper end, the second angular contact ball is equipped with the shaft shoulder of lower end Bearing 282, a bevel gear wheel 29 is equipped with the outer shroud of first angular contact ball bearing 281；The combination cutlery installation On the tool-post structure 26, the first rolling bearing assembly 361 and the second rolling bearing assembly 362 of the combination cutlery pass through Bearing hole in outer race and the both sides side wall of tool-post structure 26, which coordinates, to be assembled, the first cutlery 11 of the combination cutlery and the Two cutleries 12 are located in the coffin, and the bevel pinion 35 engages with the bevel gear wheel 29；The knife rest passes through it The shaft shoulder of the bevel gear wheel 29 of upper assembling coordinates with the shaft shoulder hole at the 2 circular bulge loop of main frame body to be assembled, the knife rest Lower end dividing plate 32 is fixed on main frame body 2 by bolt 31；The shaft shoulder and institute of the knife rest by the bevel gear wheel 29 State the realization of dividing plate 32 and the combination of tool-post structure 2 being fixedly mounted on by bolt 31 on main frame body 2；Dividing plate 32 mainly has two work( With：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 After 32 are fixedly mounted on main frame body 2, sliding sleeve 24 in the course of work can be limited and moved downward because Action of Gravity Field is issuable Trend.

Cutting system is one of important support system of the utility model electrode automatic grinding device realization principle innovation, is cut System is cut to work by 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 forms the public affairs of combination cutlery cutlery during electrode dressing Turn；Due to meshing relation between the bevel gear wheel 29 on knife rest and the bevel pinion 35 for combining cutlery shaft end be present, 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 of cylindrical cutlery 11 and arc surfaced cutlery or truncated cone-shaped cutlery 12 and bevel pinion 35 The coaxial tandem compound on axle 27, therefore also drive simultaneously and be exaggerated above-mentioned cutlery combination with axle 27 around the same of its own axis High speed rotation is walked, forms high speed rotation of the combination cutlery during electrode dressing.By said process, combination cutlery is established 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 State the bottom that reductor 7 is arranged at the housing, the output shaft of the reductor 7 is penetrated in housing and in its shaft end and assembled The power input gear 16, the rotating shaft of second transition gear 171 are 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 It is upper and be provided with above the connecting plate 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 engages 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 and the lower surface of the lower annulus cam gear ring 30 are the first identical, oppositely oriented helicoid of lead angle 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 disk 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. is matched between two contact surfaces, as shown in Figure 23-1 and Figure 23-2, under described 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 branch of the utility model electrode automatic grinding device realization principle innovation System is held, 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 formed, to be slided Dynamic matching pair；Because a pair of keys 18 forms the restriction effect of rotary motion to 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.It is supreme from larger reduction ratio speed reduction 7, power input gear 16 because servo electrode 8 segments step angle very little Decelerating effect step by step between annulus cam gear ring 23, small lift angle is justified between upper annulus cam gear ring 23 and convex wheel disc 14 in addition Matching relationship of ring cam ramp etc., a series of elements facilitate the rotation of corresponding servomotor 8 jointly, and convex wheel disc 14 is by above-mentioned Total reduction ratio relation is slowly moved vertically.Because in the course of work, the outer surface of convex wheel disc 14 is simultaneously and Top electrode is repaiied Positioning reference plane during mill, its low-speed motion speed vertically are also equal to electrode surface to be grinding connecing to coping device cutting edge Nearly speed；By controlling corner of the servomotor 8 per task, it is possible to realize the displacement to convex wheel disc 14 vertically Control, also it is achieved that the positioning to Top electrode moves the purpose of reconditioning；And with convex wheel disc 14, speed is corresponding axially movable Cutting speed when being then electrode dressing；The corresponding axial displacement of convex wheel disc 14 that turned around with cutlery per public affairs is also this practicality Issuable inclination maximum in theory when new coping device is cut electrode surface；It is by overhead cam during due to programming When disk 14 arrives each reconditioning cutting limit position axially movable, cutlery will continue to revolve round the sun some turns, therefore above-mentioned theory is processed Inclination angle is in virtual electrode reconditioning and is not present, so as to while realizing that positioning shifting to upper electrode surface cuts, make electrode work Make flatness and the depth of parallelism of electrode working surface and workpiece surface on surface etc. in the lump to be ensured.

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 disk 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 cam inclined-plane of lower cam disk 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 utility model, elastic packing back-up ring 33 is provided between the lower cam disk 34 and the dividing plate 32, such as Fig. 8 and Shown in Fig. 9.

As shown in Figures 1 to 9, in the utility model, the positioning datum adjustment mechanism include first group of adjustment mechanism and Second group of adjustment mechanism, first group of adjustment mechanism include gear shaft 4, the gear shaft 4 is arranged on the main frame body 2, And through the upper outlet body 1, main frame body 2 and lower cover 3 of the housing, the housing is stretched in outside one end of the gear shaft 4, should Overhanging end is prism-shaped, and the gear shaft 4 is provided with annular groove, and locking screw is provided with by a tapped through hole on the main frame body 2 Nail 5, the end of the lock-screw 5 is withstood in the annular groove on the gear shaft 4, the convex wheel disc 14 and the housing it Between be provided with sliding sleeve gear 19, be provided with connecting key between the inner surface of the sliding sleeve gear 19 and the outer surface of the convex wheel disc 14 18；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 circle The wearability of main frame body 2 during ring convex wheel gear ring (23 and 30) cooperating, preferably in main frame body 2 and upper and lower cam circle annular gear One sliding sleeve 24 is respectively set between (23 and 30) two matching pairs；The inner ring of the sliding sleeve 24 is assembled respectively with 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 Friction substitution when making with upper and lower annulus cam gear ring (23 and 30) respectively between a mating annular face of sliding sleeve 24 it is former with Friction between the circular bulge loop outer surface of main frame body 2；First group of adjustment mechanism is final to adjust by rotating the gear shaft 4 Axial movement of the whole convex wheel disc 14 along its own；Second group of adjustment mechanism is relative with first group of adjustment mechanism The main frame body 2 is upper and lower mirror, and second group of adjustment mechanism passes through turning gear wheel shaft 6, final adjustment lower cam disk 34 along the axial movement of its own；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.

Spring retainer back-up ring 15 is equipped with the endoporus port of sliding sleeve gear 19 at upper and lower two in housing.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 utility model, the cylindrical external gear 25 is one with the tool-post structure 26 Body 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 and the tool-post structure 26 are Split type structure, 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 shows the knife rest of split-type structural.

As shown in Figure 16-1, Figure 16-2 and Figure 16-3, in the utility model, first cutlery 11 is cylindrical cutlery, The helical angle ω 1 of a plurality of spiral line type cutting edge is identical, diameter D1, cutting edge quantity Z=n1 and the helical angle of the cylindrical cutlery ω 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 utility model, second cutlery 12 is arc surfaced cutlery, institute The surface for stating arc surfaced cutlery is one kind in outer convex globoidal or inner concave arc surface；The cambered surface radius and plan of the arc surfaced cutlery The cambered surface radius for cutting the welding tip side of reconditioning matches；It is identical that the arc surfaced cutlery includes several geometries Cutting edge；The physical dimension of the arc surfaced cutlery includes cutlery outside diameter D2, cutlery end diameter D3 and cutting edge quantity Z =n2；The span of the physical dimension and the electrode diameter R and the second cutlery cutting edge helical angle ω 2 for intending cutting reconditioning Relation it is as follows：

As shown in Figure 15, Figure 17-3 and Figure 17-4, in the utility model, second cutlery 12 is truncated cone-shaped cutlery, institute The cone angle for stating welding tip side of the cone angle of truncated cone-shaped cutlery with intending cutting reconditioning matches；The truncated cone-shaped cutlery includes There are several geometry identical cutting edges；The physical dimension of the truncated cone-shaped cutlery includes cutlery outside diameter D2, cutlery small end Diameter D3 and cutting edge quantity Z=n3；The span of the physical dimension and the electrode diameter R and described second for intending cutting reconditioning Cutlery cutting edge back rake angle ε relation is as follows：

As shown in figure 18, in the utility model, the geometric parameter of the cutting edge of the second cutlery 12 include anterior angle λ, dorsal horn δ, Sword thickness b and sword thickness dorsal horn θ；The anterior angle λ, dorsal horn δ, sword thickness b and sword thickness dorsal horn θ relation are as follows：

Also include following part in the utility model coping device, to assist a ruler in governing a country the stable work of each functional system and mechanism Make, including：

(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 are that 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 of system forms adverse effect；Chip during due to electrode grinding device leaks 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 disk 34 come off from coping device main frame body 2；After coping device installation is in place, if convex wheel disc 14 When being in lower work posture with lower cam disk 34, it is allowed to do not install the spring retainer back-up ring 15 in portion.

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

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

The utility model electrode automatic grinding device using a variety of inductors in production in use, control oneself of coping device Dynamic start and stop, the start and stop of hand switch control coping device can also be used.

One end of the utility model electrode grinding device main frame body 2 is used for mounting hole when coping device is installed for prefabricated 4, can According to manufacturing technique requirent is rack-mount or the basal plane of other stabilizations on.

To sum up, the utility model is overcome in the prior art because above-mentioned caused by the reasons such as structure ＆ working mechanism attribute Problem.The knife rest established by cutting system takes the working method that combination cutlery rotates, it is thus identified that the utility model electrode is automatic The combination cutlery of coping device during electrode dressing with the principle attribute of revolution+high speed rotation, and for multiple-cutting-edge cutlery use Create necessary condition；By the multiple-cutting-edge cutlery cutting edge more sharp keen and high-revolving work characteristics of cutlery, moved with reference to cutting displacement Accurate control of the dynamic system to cutting displacement translational speed and mobile displacement, realize and electrode is worked under the conditions of micro- bite The positioning at end moves cutting.The implementation in the lump of abovementioned technology, not only effectively reduces the cutting stress of cutlery cutting edge, carries simultaneously The high service life of cutlery；Due to the change of cutlery cutting edge cutting principle during electrode dressing, in electrode working surface Grinding quality, electrode material consumption and the aspects such as quality of welding spot can also obtain and produce effects very well.

Although the utility model is described above in conjunction with accompanying drawing, the utility model is not limited to above-mentioned Embodiment, above-mentioned embodiment is only schematical, rather than restricted, the ordinary skill of this area Personnel are under enlightenment of the present utility model, in the case where not departing from the utility model aims, can also make many variations, this Belong within protection of the present utility model.

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 formula part, is the entire body gusset in irregular shape face in the middle part of the main frame body (2)；It is described One end of main frame body (2) gusset is provided with that external diameter is identical and upper and lower both sides are asymmetric raised circular bulge loop；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) the first rolling bearing assembly (361), the first cutlery (11), the second cutlery are sequentially provided with to the other end of the cutter shaft (27) (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 The circle of different-diameter, has a plurality of cutting edge on 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) are 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 to be intersected vertically with cylinder center axially bored line, and one is provided with the centre bore of cylinder Coffin, the side wall of the coffin are cut with the inwall in the hole and handed over, and the coffin is more than to be combined in cutlery with described First cutlery (11) and the second cutlery (12) space shared when turning round；The top and bottom of the cylinder are equipped with the shaft shoulder, on The first angular contact ball bearing (281) is equipped with the shaft shoulder of end, the second angular contact ball bearing (282), institute are equipped with the shaft shoulder of lower end 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 equal 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 machine (7) tandem compound, the power input gear (16) is assemblied in speed reducer output shaft and worn Enter the shaft end of enclosure interior, and the second transition gear (171) with being placed in main frame body (2) gusset bottom engages；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 disk (34), the convex wheel disc (14) and the lower cam disk (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, under described 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 disk (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 outlet body (1) on the main frame body (2) and through the housing, Main frame body (2) and lower cover (3), the housing are stretched in outside one end of the gear shaft (4), the overhanging end is prism-shaped, described Gear shaft (4) is provided with annular groove, and lock-screw (5), the lock are provided with by the tapped through hole of side one on the main frame body (2) 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), connection is provided between the inner surface of the sliding sleeve gear (19) and the outer surface of the convex wheel disc (14) Key (18)；First group of adjustment mechanism by rotating the gear shaft (4), convex wheel disc (14) described in final adjustment along its from The axial movement of body；Second group of adjustment mechanism main frame body (2) relative with first group of adjustment mechanism is upper and lower mirror As relation, axial movement of the second group of adjustment mechanism final adjustment lower cam disk (34) along its own；

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

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) it is provided with the space of the both ends shaft shoulder for being used for accommodating the cutter shaft (27) and bevel pinion (35) and stop nut (37).

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 after anterior angle α, sword thickness f, dorsal horn σ and sword, the value of the parameter 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 of the truncated cone-shaped cutlery and the cone angle kissing for intending cutting the welding tip side of 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 The geometric parameter of tool (12) cutting edge includes anterior angle λ, dorsal horn δ, sword thickness b and sword thickness dorsal horn θ；The anterior angle λ, dorsal horn δ, sword thickness b and Sword thickness dorsal horn θ relation is as follows：