CN207171205U - Combination cutlery for electrode automatic grinding device - Google Patents

Abstract

The utility model discloses a kind of combination cutlery for electrode automatic grinding device, including cutter shaft, one end of the cutter shaft to be fixed with bevel gear；Fixed between the bevel gear and the cutter shaft using radially connected pin, on the cutter shaft, the other end from the bevel gear to the cutter shaft 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, and when first cutlery rotates, the profile traces of cutting edge revolution match with intending the welding tip plane of cutting reconditioning；There is a plurality of cutting edge, when second cutlery rotates, the trajectory of the profile traces line of cutting edge revolution and the welding tip side of plan cutting reconditioning is coincide on the outer surface of second cutlery.The characteristics of being respectively provided with multiple-cutting-edge cutting edge due to each cutlery in combination cutlery, total cutting stress is shared by more cutting edges, can improve cutlery service life several times.

Description

Combination cutlery for electrode automatic grinding device

Technical field

The cutlery in a kind of electrode machining is the utility model is related to, more particularly, to being used in a kind of electrode automatic grinding device Cutlery.

Background technology

During resistance spot welding process, electrode automatic grinding device is realized to welding tip face by cutlery disposed within The purpose of shape face reconditioning, it is known that technology caused by the structure design pattern of cutlery and its operation principle in electrode grinding device, It is primarily present following deficiency：

(1) due to the limitation of operation principle, using integral type cutlery, and recommend single-blade structural shape more.

(2) cutlery is fixed on the knife rest in electrode automatic grinding device and with knife rest synchronous rotary, and cutlery is to electrode rotary Axis of rotation during processing and electrode axis coaxle, i.e., centre of gyration when cutlery cutting edge works remain using electrode axis as Axle；Due to being difficult in existing electrode automatic grinding device principle to cut the actual reconditioning quality of Bit andits control electrode, the electricity after reconditioning Pole working surface is essentially spiral camber.

(3) operation principle determines working condition of the existing cutlery under cutting edge structure design pattern to be best, while Determine that cutting force when electrode cuts reconditioning must be established by the rotation power cooperation of electrode pressure and cutting edge；Electrode dressing process In, the cutting edge for undertaking electrode plane reconditioning part is under maximal bending moment effect positively related with electrode pressure all the time, limitation Cutlery cutting edge is not allowed to be made to excessively sharp keen and is difficult to the cutting reconditioning for being carried out electrode in a manner of micro- bite, makes excessively to cut It is whittled into as the main consumption in consumption of electrode.

(4) because welding electrode is there is repetitive positioning accuracy error, Cutting Edge Design active length has to comply with >=and it is to be cut The condition of the radius of reconditioning electrode+electrode repetitive positioning accuracy, it could meet in the range of repetitive positioning accuracy to electrode end to be repaired The requirement of effective cutting reconditioning in face；Consider from probability statistics angle, about 50% cutting reconditioning is to exceed electricity in local cutting edge Carry out cutting reconditioning under the conditions of polar radius, the local cutting edge more than electrode radius part is the work under anti-sword hard squeeze state Make, easily cause the tipping of the part cutting edge.

(5) local cutting edge exceedes electrode radius phenomenon, i.e. cutting edge during the operating mode due to nearly 50% has cutting reconditioning The radius of gyration of design length palpus ＞ cutting edges, limits making for more cutting edge structure patterns for the purpose of reducing cutting edge live load With the processing with cutlery cutting edge chip breaking inclination angle；Because Cutting trajectory line is helix and chip is continuously to consider to be worth doing, easily forms folded bits and squeeze The caused tipping phenomenon of pressure can not cut phenomenon.

(6) due to axis of rotation and the electrode axis coaxle of cutting edge, in working angles, cutting edge center turns with cutting edge outer rim Moving-wire speed and rotation linear acceleration very different, that is, prolong the service load born at each position of cutting edge total length or moment of flexure difference very Great disparity, outer rim cutting edge greatly turn into dangerous position because rotating linear acceleration；Meanwhile because of cutting edge total length each several part cutting linear velocity Difference is huge, also results in the difference of each position grinding quality of electrode surface after reconditioning.

(7) because cutlery cutting edge works under a series of above-mentioned unfavorable conditions, even if the material that selection is relatively expensive Cutlery is made, can not also break away from the result that cutlery is the consumable accessory in electrode automatic grinding device.

Utility model content

For above-mentioned prior art, the utility model provides a kind of combination cutlery for electrode automatic grinding device.It is logical Intervention of the utility model combination cutlery in electrode grinding device product is crossed, changes prior art cutlery in electrode dressing process In cutting principle, many weak point formed in the prior art by principle reason can be overcome, to ensure that electrode is repaiied Mill quality creates necessary condition.The utility model is combined more cutting edges by changing the working method and structural shape of cutlery Cutlery is incorporated into coping device, and the cutting stress of identical cutting reconditioning quality can be shared by more cutting edges, improves the use of cutlery Life-span.The utility model is reduced by the use of more cutting edge cutleries and the large scale of cutting edge cutting stress, it is allowed to will combine cutlery Cutting edge manufacture it is more sharp keen, the cutting edge of combination cutlery is possessed the ability of small, micro- bite；In small, micro- bite Under the conditions of, cutting stress of the cutting edge during cutwork further reduces, and further increase combination cutlery uses the longevity Life.The ability of the utility model combination cutlery small, micro- bite in electrode dressing process is a series of beneficial technologies in electricity Implement in the automatic grinding device of pole and technological effect obtains and creates good basic condition.

In order to solve the above-mentioned technical problem, the utility model proposes a kind of combination sword for electrode automatic grinding device Tool, including cutter shaft, one end of the cutter shaft are fixed with bevel gear；Radially connected pin is used between the bevel gear and the cutter shaft Fixed, on the cutter shaft, the other end from the bevel gear to the cutter shaft is sequentially provided with the first rolling bearing assembly, the first sword Tool, the second cutlery, the second rolling bearing assembly, packing ring and locking nut；The first cutlery shape of cross section is circle and has There is the cutting edge of a plurality of spiral line type, when first cutlery rotates, the profile traces of cutting edge revolution and the electrode for intending cutting reconditioning Work transverse plane matches；There is a plurality of cutting edge, when second cutlery rotates, cutting edge returns on the outer surface of second cutlery The trajectory of welding tip side of the profile traces line turned with intending cutting reconditioning is coincide.

Further, in the utility model, first cutlery is cylinder cutlery, the helical angle of a plurality of spiral line type cutting edge ω 1 is identical, and diameter D1, the cutting edge quantity n1 of the cylinder cutlery 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：

In the utility model, if second cutlery is cambered surface cutlery, the surface of the cambered surface cutlery be outer convex globoidal or It is one kind in inner concave arc surface；The cambered surface half of welding tip side of the cambered surface radius of the cambered surface cutlery with intending cutting reconditioning Footpath matches.The cambered surface cutlery includes several geometry identical cutting edges；The physical dimension of the cambered surface cutlery includes Cutlery 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 it is as follows：

In the utility model, if second cutlery is round platform cutlery, the cone angle of the round platform cutlery is with intending cutting reconditioning The cone angle of welding tip side match.The round platform cutlery includes several geometry identical cutting edges；The circle The physical dimension of platform cutlery includes cutlery outside diameter D2, cutlery end diameter D3 and cutting edge quantity n3；The physical dimension Electrode diameter R and the round platform cutlery cutting edge back rake angle ε of the span with intending cutting reconditioning relation are as follows：

In the utility model, the geometric parameter of the second cutlery cutting edge includes the thick back of the body of anterior angle λ, dorsal horn δ, sword thickness b and sword Angle 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) the characteristics of being respectively provided with multiple-cutting-edge cutting edge due to each cutlery in combination cutlery, total cutting stress is shared by more cutting edges, Cutlery service life several times can be improved.

(2) permission Cutting Edge Design obtains more sharp keen, and allows cutlery under the conditions of smaller bite to electrode table to be grinding Cut reconditioning in face, it is easy to accomplish the excessive cutting of effective control and suppression to electrode to electrode dressing amount, can large scale reduction Consumed electrode.

(3) unevenness of working surface after electrode dressing is reduced, and is improved between electrode working surface and workpiece surface Depth of parallelism index, to improving feedthrough electrode electrical efficiency and ensureing that quality of welding spot is extremely beneficial.

Brief description of the drawings

Fig. 1-1 is the end direction view of the first cutlery in the utility model gang tool；

Fig. 1-2 is the axial sectional view of the first cutlery in the utility model gang tool；

Fig. 1-3 is the dimensional structure diagram of the first cutlery in the utility model gang tool；

Fig. 2-1 is the axial sectional view that the second cutlery is cambered surface cutlery in the utility model gang tool；

Fig. 2-2 is the left view of cambered surface cutlery shown in Fig. 2-1；

Fig. 3-1 is the axial sectional view that the second cutlery is round platform cutlery in the utility model gang tool；

Fig. 3-2 is the left view of round platform cutlery shown in Fig. 3-1；

Fig. 4 is the cutting edge structure of the second cutlery and parameter schematic diagram in the utility model gang tool；

Fig. 5 is the axial sectional view of the utility model gang tool, and the second cutlery therein is circular arc cutlery.

Fig. 6 is the axial sectional view of the utility model gang tool, and the second cutlery therein is round platform cutlery；

Fig. 7-1 is that the welding tip side for intending cutting reconditioning is the electrode schematic diagram of spirogyrate cambered surface；

Fig. 7-2 is that the welding tip side for intending cutting reconditioning is the electrode schematic diagram of interior convex-shaped arc surface；

Fig. 7-3 is that the welding tip side for intending cutting reconditioning is the electrode schematic diagram on round platform surface；

Fig. 8-1 is the upward view of the electrode formed with radioactivity Cutting trajectory brightness spot after cutting reconditioning；

Fig. 8-2 is the section of A-A positions in Fig. 8-1；

Fig. 8-3 is partial structurtes enlarged drawing at B in Fig. 8-2.

In figure：The cutleries of 1- first, 2- cambered surface cutleries, 3- round platform cutleries, 4- cutter shafts, 5- bevel gears, 6- connecting pins, 71- One bearing assembly, 72- second bearing components, 8- packing rings, 9- locking nuts, 10- intend the electrode of cutting reconditioning, 11- spirogyrate arcs Face, 12- concave shaped cambered surfaces, 13- round platforms surface, 14- welding tip planes, 16- Cutting trajectory brightness spots.

Embodiment

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 combination cutlery for electrode automatic grinding device, as shown in Figure 5 and Figure 6, including Cutter shaft 4, one end of the cutter shaft 4 are fixed with bevel gear 5.Radially connected pin 6 is used between the bevel gear 5 and the cutter shaft 4 It is fixed, on the cutter shaft 4, the other end from the bevel gear 5 to the cutter shaft 4 be sequentially provided with the first rolling bearing assembly 71, First cutlery 1, the second cutlery (2 or 3), the second rolling bearing assembly 72, packing ring 8 and locking nut 9.

As shown in Fig. 1-1, Fig. 1-2 and Fig. 1-3, the shape of cross section of the first cutlery 1 is circle and has a plurality of spiral The cutting edge of line style, first cutlery 1 are a special multiple-cutting-edge spiral cylinder cutters, and when first cutlery 1 rotates, cutting edge returns The profile traces turned match with intending the welding tip plane 14 of cutting reconditioning, in the course of work, (the cylinder of the first cutlery 1 Cutlery) only undertake welding tip plane 14 machining work, as shown in Fig. 7-1, Fig. 7-2 and Fig. 7-3.

In the utility model, the helical angle ω 1 of a plurality of spiral line type cutting edge of the first cutlery 1 is identical, first cutlery 1 Different according to its body diameter, the cutting edge quantity and the helical angle ω 1 of cutting edge that cutlery surface is opened are also different；The helical angle The meaning that ω 1 is represented is identical with the implication of cutting edge helical angle in cylindrical milling cutter standard；The diameter D1 of the cylinder cutlery and its Put the first edge on a knife or a pair of scissors mouthful quantity Z=n1 and cutting edge helical angle ω 1 relation of surface preferably meets recommendation in table 1.

Table 1：The diameter of cylinder cutlery selects the table of comparisons with surface cutting edge quantity and cutting edge helical angle ω 1

The geometry of the cylinder cutlery cutting edge can use width e after the anterior angle α of cutlery cutting edge, sword thickness f, dorsal horn σ and sword Described jointly etc. parameter；Wherein, anterior angle α is bigger, represents that cutting edge is sharper keen, but the ability for bearing load also accordingly reduces；Sword is thick F, after dorsal horn σ and sword width e be characterized cutting edge sword after part counter blade mouth enabling capabilities geometric parameter, sword thickness f and sword Width e is bigger afterwards and cutting edge dorsal horn σ more hours, reflection cutting edge sword rear are stronger to the enabling capabilities of cutting edge.The parameter with The meaning of each parameter is identical in cylindrical milling cutter standard；After the anterior angle α of the cutlery cutting edge, sword thickness f, dorsal horn σ and sword between width e Relation preferably meet recommendation in table 2.

Table 2：Relation between each parameter of cylinder cutlery edge geometrical shape

As shown in Fig. 1-1 and Fig. 1-2, d is the shaft hole diameter of cylinder cutlery, because of the first cutlery (cylinder cutlery) 1 and cutter shaft 4 Installed for shaft hole matching, its nominal size is equal with the external diameter of cutter shaft 4；In order to ensure the strong of the cylinder cutlery cutting edge matrix position Degree, cutlery shaft hole diameter d can be by d >=D1-3 values.Cylinder when h is connected between cylinder cutlery and cutter shaft 4 using semiaxis mode Highly, from the point of view of the gyro rigidity of collateral security cutter shaft 4 and cylinder cutlery connection reliability, axis hole height can for axis hole on cutlery By the value of h >=1；L1 is the length of cylinder cutlery, and its span is by the diameter of plan reconditioning electrode working face, design value palpus Ensure the radius+1 of L1 >=plan reconditioning electrode working face.Because cutting stress of the cylinder cutlery in electrode dressing is minimum, The connected mode of cylinder cutlery and cutter shaft shown in Fig. 1-1 and Fig. 1-2 can also use the connected modes such as key connection or splicing.

In the utility model, there is a plurality of cutting edge on the outer surface of second cutlery, when second cutlery rotates, sword The trajectory of the profile traces line of mouth revolution and the welding tip side of plan cutting reconditioning is coincide.

As shown in Fig. 7-1 and Fig. 7-2, because the shape of welding tip side is likely to be spirogyrate cambered surface 11 or interior Concave-shaped arc surface 12 or round platform surface 13, therefore, second cutlery are probably cambered surface cutlery 2 or round platform cutlery 3.

If second cutlery is cambered surface cutlery 2, its surface is probably outer convex globoidal or inner concave arc surface (such as Fig. 2-1 It is shown) in one kind, the cambered surface radius of the cambered surface cutlery 2 and intend cutting reconditioning welding tip side cambered surface radius phase It coincide, as shown in Fig. 7-1 or Fig. 7-2.As shown in Fig. 2-2, the cambered surface cutlery 2 includes several geometry identical swords Mouthful；The physical dimension of the cambered surface cutlery 2 includes cutlery outside diameter D2, cutlery end diameter D3 and cutting edge quantity n2；Because of arc The physical dimension of face cutlery 2 is smaller and is multiple-cutting-edge curved-surface structure pattern, considers from facilitating cutlery to make angle, can be by cambered surface Cutlery cutting edge helical angle ω 2 is limited within the scope of≤5 °；Physical dimension, cutting edge quantity Z=n2 and the cambered surface sword of cambered surface cutlery 2 Electrode diameter Rs of the tool cutting edge helical angle ω 2 with intending cutting reconditioning relation preferably meets the recommendation in table 3.

Table 3：The relation of cambered surface cutlery physical dimension, cutting edge quantity and helical angle

If second cutlery is round platform cutlery 3, as shown in figure 3-1, the cone angle of the round platform cutlery 3 is with intending cutting reconditioning The cone angle of welding tip side match；As shown in figure 3-2, it is identical to include several geometries for the round platform cutlery 3 Cutting edge；The physical dimension of the round platform cutlery 3 includes cutlery outside diameter D2, cutlery end diameter D3 and cutting edge quantity n3； Because the round platform cutlery 3 than the cambered surface cutlery 2 has more preferable processing technology, from the point of view of beneficial to chip removal, circle The cutting edge of platform cutlery 3 is equipped with back rake angle ε, and back rake angle ε angle is preferably between 10 °~15 °.The knot of the round platform cutlery 3 The electrode diameter R of structure size, cutting edge quantity Z=n3 and round platform cutlery cutting edge back rake angle ε with intending cutting reconditioning relation preferably accords with Close the recommendation in table 4.

Table 4：The relation of round platform cutlery physical dimension, cutting edge quantity and helical angle

As shown in figure 4, the anterior angle λ of the geometry cutlery cutting edge of the cambered surface cutlery 2 and the round platform cutlery cutting edge, The parameter such as dorsal horn δ, sword thickness b and sword thickness dorsal horn θ describes jointly.Wherein, cutting edge anterior angle λ is bigger, represents that cutting edge is sharper keen, but bear The ability of load also can be reduced accordingly；The parameter such as dorsal horn δ, sword thickness b and sword thickness dorsal horn θ is common description cutting edge back to cutting edge branch The parameter of support ability, cutting edge sword thickness b is bigger, dorsal horn δ and sword thickness dorsal horn θ are smaller, represents branch when cutting edge rear portion counter blade mouthpiece carries Support ability is stronger；The relation of the geometric parameters such as cutting edge anterior angle λ, dorsal horn δ, sword thickness b and sword thickness dorsal horn θ preferably meets pushing away in table 5 Recommend value.

Table 5：Relation between cambered surface cutlery and round platform cutlery cutting edge geometric parameter

As shown in Fig. 2-1 and Fig. 2-2, the shaft hole diameter of the second cutlery is also represented with d, and with the axis hole in the first cutlery 1 Diameter d has identical meaning and identical span；When cutlery combines, it is desirable to the first cutlery in same group of combination cutlery 1 is equal with the shaft hole diameter of the second cutlery；H is the axis hole height of the second cutlery, and is had with the axis hole height h in the first cutlery 1 There are identical meaning and identical span；When cutlery combines, it is desirable to the first cutlery 1 and second in same group of combination cutlery The axis hole of cutlery is highly equal.D4 is the diameter of the false boss coordinated when being assembled for the second cutlery with second bearing component, its Span preferably meets (bearing inner ring internal diameter+1 joined together) ＜ D4 ＜ (bearing inner ring external diameter joined together).L2 is described second The axial overall length of cutlery, maximal projection length of the cutting edge line on cutlery axis when L3 is the second cutlery depth containing cutting edge with Material thickness sum on the outside of the length needed for cutting edge proof strength；From the point of view of the second cutlery manufacturing cost, by D4 with (L2-L3) cylinder boss determined by can also be replaced with diameter dimension and above-mentioned recommendation value identical pad.R is cambered surface cutlery Cambered surface radius, its value be equal to cambered surface cutlery intend machined electrode work end side surface cambered surface radius；β 1 is that cambered surface cutlery is to avoid Electrode resetting error produces the safety angle for hitting knife and setting；The β 1 is designed as follows, from the cambered surface of cambered surface cutlery 2 Destination counties of the radius R in the big end outer of cambered surface cutlery 2 makees tangent line, and the angle between the tangent line and cambered surface cutlery axis is institute State the safety angle β 1 of cambered surface cutlery 2.As shown in Fig. 3-1 and Fig. 3-2, β 2 is the conical inclination and round platform sword of the round platform cutlery 3 Has the angle between axis, its value is identical with the inclination angle of cone electrode work end side surface；2* β 2 are to intend reconditioning truncated cone-shaped The cone angle of welding tip, and the cone angle of round platform cutlery.

In the utility model, no matter the cylinder cutlery 1 of the first cutlery 1, or the cambered surface cutlery 2 or round platform sword of the second cutlery Tool 3, is the more cutting edge cutleries of compound curved surface, with the integral type single-blade recommended in electrode automatic grinding device in the prior art more Mouth cutlery is compared, and multiple-cutting-edge cutlery of the present utility model, which removes, to press Fig. 5 or Fig. 6 compositions of relations in the first cutlery 1 and the second cutlery After could use it is outer, it is necessary to make the combination cutlery shown in Fig. 5 or Fig. 6 axis remained during electrode dressing with it is electric The vertical state rotation of pole axis line, i.e., it is that when being worked in the form of revolution+rotation, could obtain to electrode work that must ensure combination cutlery Make the reconditioning effect of end face.So-called multiple-cutting-edge cutlery, it is the cutlery phase only with a cutting edge recommended more with prior art Than the minimum cutting edge quantity of the first cutlery and the second cutlery in the utility model is 6.The compound curved surface of so-called cutlery, means The geometry of the cutlery cutting edge thin portion need to be described jointly by more sizes and multi-angle.

Cylinder cutlery as the first cutlery 1 only undertakes welding tip working surface plane during electrode dressing Machining；Cambered surface cutlery 2 or round platform cutlery 3 as the second cutlery only undertakes electrode work during electrode dressing The machining of end side surface, cambered surface radius and direction or cone angle etc. are determined by technological requirement.

The utility model combination cutlery is used to create following advantage for electrode automatic grinding device：First, by multiple-cutting-edge Mouth shares the cutting load undertaken in the prior art by cutting edge, improves the service life of cutlery；Second, because cutting edge cutting is negative Lotus is greatly lowered, and the cutting edge of cutlery can be made to be made to more sharp keen, cutlery cutting edge is worked under the conditions of micro- bite；Pass through The realization of micro- bite cutting way, the flatness of electrode working surface can be effectively improved.

The electrode working surface combined using the utility model after cutlery reconditioning has radioactivity brightness spot feature, can pass through tune Whole group closes the height and density of the diameter adjustment brightness spot crest line of the working speed of cutlery and the cylinder cutlery of the first cutlery 1；Work as a little When weldering object is aluminum or aluminum alloy, small diameter cylinders cutlery should be selected, is improved by increasing brightness spot ridge height to aluminium or aluminium conjunction The damage capability of golden watch surface oxidation film；During spot welding steel, cylinder with large diameter cutlery 1 should be selected, to improve the plane of electrode surface Degree.The radioactivity Cutting trajectory brightness spot as shown in Fig. 8-1, Fig. 8-2 and Fig. 8-3 is formed in electrode working surface plane after reconditioning 16；The height and crest line density of the crest line of Cutting trajectory brightness spot 16 and cutlery cutting rotational speeds and circle in the utility model gang tool The diameter of post cutlery is relevant；Therefore, the feature can be utilized, can when the electrode of institute's reconditioning is to be used for aluminium and aluminium alloy pinpoint welding By way of properly increasing ridge height and crest line density, to obtain to the more preferable crushing effect of workpiece surface oxide-film；When During spot welding steel, then the method by reducing ridge height and reducing crest line density, electrode surface unevenness is reduced to obtain Effect.

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 (7)

1. a kind of combination cutlery for electrode automatic grinding device, including cutter shaft (4), one end of the cutter shaft (4) are fixed with cone Gear (5)；It is characterized in that：

It is fixed using radially connected pin (6) between the bevel gear (5) and the cutter shaft (4), on the cutter shaft (4), described in Bevel gear (5) to the other end of the cutter shaft (4) is sequentially provided with the first rolling bearing assembly (71), the first cutlery (1), the second sword Tool, the second rolling bearing assembly (72), packing ring (8) and locking nut (9)；

First cutlery (1) shape of cross section is circle and has the cutting edge of a plurality of spiral line type, first cutlery (1) During rotation, the profile traces of cutting edge revolution match with intending the welding tip plane of cutting reconditioning；

There is a plurality of cutting edge on the outer surface of second cutlery, when second cutlery rotates, the profile traces of cutting edge revolution The trajectory of welding tip side of the line with intending cutting reconditioning is coincide.

2. it is used for the combination cutlery of electrode automatic grinding device according to claim 1, it is characterised in that：First cutlery is Cylinder cutlery (1), the helical angle ω 1 of a plurality of spiral line type cutting edge is identical, the diameter D1 of the cylinder cutlery (1), cutting edge quantity N1 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 span of the parameter It is as follows with the relation of spot welding object material：

3. it is used for the combination cutlery of electrode automatic grinding device according to claim 1, it is characterised in that second cutlery is Cambered surface cutlery (2), the surface of the cambered surface cutlery (2) are one kind in outer convex globoidal or inner concave arc surface；The cambered surface cutlery (2) cambered surface radius of welding tip side of the cambered surface radius with intending cutting reconditioning matches.

4. it is used for the combination cutlery of electrode automatic grinding device according to claim 1, it is characterised in that second cutlery is Round platform cutlery (3), the cone angle of welding tip side of the cone angle of the round platform cutlery (3) with intending cutting reconditioning match.

5. it is used for the combination cutlery of electrode automatic grinding device according to claim 3, it is characterised in that：The cambered surface cutlery (2) several geometry identical cutting edges are included；The physical dimension of the cambered surface cutlery (2) include cutlery outside diameter D2, Cutlery end diameter D3 and cutting edge quantity n2；The span of the physical dimension and electrode diameter R and the institute for intending cutting reconditioning The relation for stating the second cutlery cutting edge helical angle ω 2 is as follows：

6. it is used for the combination cutlery of electrode automatic grinding device according to claim 4, it is characterised in that：The round platform cutlery (3) several geometry identical cutting edges are included；The physical dimension of the round platform cutlery (3) include cutlery outside diameter D2, Cutlery end diameter D3 and cutting edge quantity n3；The span of the physical dimension and electrode diameter R and the institute for intending cutting reconditioning The relation for stating the second cutlery cutting edge back rake angle ε is as follows：

7. it is used for the combination cutlery of electrode automatic grinding device according to claim 5 or 6, it is characterised in that second sword The geometric parameter of tool 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 are thick Dorsal horn θ relation is as follows：