CN201613382U

CN201613382U - Improved groove-shaped spiral cutter

Info

Publication number: CN201613382U
Application number: CN2010201428930U
Authority: CN
Inventors: 江延军; 王峰; 王海洲
Original assignee: DALIAN TOP-EASTERN DRILLS Co Ltd
Current assignee: DALIAN TOP-EASTERN DRILLS Co Ltd
Priority date: 2010-03-25
Filing date: 2010-03-25
Publication date: 2010-10-27
Anticipated expiration: 2020-03-25

Abstract

The utility model discloses an improved groove-shaped spiral cutter which comprises an axle, wherein the axle comprises a front end and an outer surface; the outer surface has the following structure: a groove extends along the longitudinal axis of the axle at a spiral angle; the groove is provided with a groove-shaped front end which extends from the peripheral radius towards the inside and a groove-shaped bottom part; seen from the front end of the axle, the projection of the groove-shaped front end is a straight line; the back edge of a blade extends along the longitudinal axis of the axle at the spiral angle; the back edge of the blade is provided with a blade margin which has the radius equal to the radius of the periphery; the back edge of the blade is provided with a back cleaning area and is the inner periphery of the peripheral radius; a continuous surface is arranged between the groove-shaped bottom part and the back cleaning area; the radius of a groove-shaped rear end is 15 to 75 percent of the peripheral radius; and the minimum width of the longitudinal axis of the cutter is the core-drilling thickness and is smaller than the length of a back cleaning arc. By the structural improvement of a drill bit, the drill bit has the maximum core-drilling thickness so as to guarantee the maximum torsional strength and improve the fluidity of cooling fluid and cuttings simultaneously, and can process holes with the depth being 4 to 5 times than the outer diameter of the drill bit on workpieces.

Description

The helical tooth blade of improvement ditch shape

Technical field

The utility model relates to a kind of helical tooth blade, relates in particular to a kind of helical tooth blade that has the ditch shape rear end that a spiral grooves and a land that links to each other and and groove link to each other with land at least that has.

Background technology

Cutter of the prior art is an example with the fluted drill, generally includes a columniform handle and forms with the land that links to each other with at least one groove.Groove and land extend to the front end cutting edge according to spiral angle.Land has the land that is attached thereto and in the clear back of the body zone of land back.The intersection of land is defined as the side cutting edge on groove and the land.In many drill bits, the end that is typically relative part with cutting edge on the land is a sharp edge.Yet a such sharp edge is also inoperative in drilling process, and just by the result that process produced, this process is that second emery wheel forms the land and the land of drill bit with first emery wheel processing groove.Yet, this sharp edge may disturb in the bit cutting process flowing at the cooling fluid of drill bit generally speaking, furthermore, remove the intensity reduction that causes drill bit owing to form the unnecessary material that this sharp edge brought, and the flowing of smear metal in the prevention drilling process, thereby about 4-5 that the degree of depth of bit bore is limited in its external diameter doubly.If drill bit is withdrawn from the hole, smear metal is discharged from groove, and then reenter this hole and proceed driller processing, so also can obtain the darker drilling degree of depth.Here it is the well-known brill of pecking.

Some drill bits do not have such sharp edge.Parabola shaped drill bit generally is made up of a cylindrical handle and groove and land, and in groove and intersection away from the land of cutting edge, this sharp edge is by the favourable elimination in curvilinear limit.The parabola drill bit is typically applied under the slow-speed of revolution, the underloaded situation.The parabola drill bit is designed to be applied to deep hole machining, for this reason, it has the ability that high relatively spiral angle and darker groove improve scrap fallaway, darker groove make drill bit outside cutting edge relative thin some, so just reduced the torsional strength of drill bit.In addition, the minimizing of bit exterior cutting edge cross-sectional area makes drill bit be more prone to bending and coil buckling.Yet, can make parabola drill bit typical application in the process that need not to peck brill as this design, can in workpiece, get out in the application in hole of the 10-15 times of degree of depth of bit exterior diameter.

Russian Patent number is 948624, and title in Fig. 1-3, illustrates a kind of drill bit for the method for processing fluted drill, groove and be a curve regions away from the intersection of the land of cutting edge.Yet the minor radius of curve regions has been stipulated one than shallow trench, and other feature is similar with the conventional drill of discussing before.Flowing of cooling off still suppressed by land, and material is forced to therefore, reduce the core diameters of drill bit from the sharp curve of hinge of bit central portion removal in order to adaptation formation groove and the formation of intersection, ditch shape rear end.

A kind of drill bit design just is required, this drill bit design can be under the brill core thickness situation of the maximum of bringing maximum transverse strength for drill bit, have the cooling fluid of improvement and chip flow, and have the ability that on workpiece, processes greater than the hole of the outside diameter 4-5 times degree of depth.

In addition, in the past, make a kind of cutter that has spiral grooves simultaneously and comprise the land of land, need carry out two independently grinding process.A process is to grind out groove with an emery wheel, another independently process be to grind out land by second emery wheel.These two independently grinding process need be installed to two to cutter independently on the grinding machine.Therefore, cutter must install on each grinding machine very accurately, to determine that groove and land all are to grind along same spiral path.In addition, grinding machine must be configured to similarly guide angle, all has same spiral angle to determine groove and land.If cutter is not installed accurately, and groove and land do not carry out correct grinding, and this cutter will defectiveness, therefore, and must be discarded it.In a nearlyer step, the operation that two platform independent are set is not only lost time, easier makeing mistakes.Therefore, compare with two grinding machines, preferably can be with a grinding machine process tool.

So just occurred by using a kind of independent emery wheel and a kind of conforming method to substitute the demand that independently grinds operation with two.At last, a kind of like this emery wheel can be processed by a single head dressing tool or CNC equipment.Yet these methods expend time in and are expensive.Therefore, a kind of more efficient method and apparatus that is used for processing this emery wheel of design is very important.

Summary of the invention

The purpose of this utility model provides a kind of drill bit, and this drill bit has wammel core thickness and also has the flowability of improving cooling fluid and smear metal when guaranteeing maximum transverse strength, and can process the hole greater than the outside diameter 4-5 times degree of depth on workpiece.

The technical scheme that the utility model adopted is achieved in that

A kind of helical tooth blade of improveing ditch shape comprises the axle with longitudinal axis, and axle also comprises a front end and an outer surface; From having the cross section of a segment distance with the longitudinal axis vertical direction and with front end, outer surface comprises following structure:

A, comprise the groove that extends by spiral angle along the longitudinal axis of axle, wherein groove has the ditch shape front end that extends internally from the outer rim radius and the ditch shape bottom of adjoining mutually with ditch shape front end, and ditch shape front end is from the front end of axle, and its projection is the bar straight line;

B, the land that adjoins groove extend along the spiral angle direction by the longitudinal axis of axle, and wherein land has the land that adjoins ditch shape front end, and land has the radius that equates with the outer rim radius; Land has the Qing Bei district that adjoins land, and takes all of week in the outer rim radius;

C, the zone that is the ditch shape rear end of convex and adjoins clearly the back of the body have formed the continuous face between ditch shape bottom and the Qing Bei district, and wherein the radius of ditch shape rear end is the 15-75% of outer rim radius;

The minimum widith of the longitudinal axis of d, cutter is to bore core thickness, and it is littler than clear back of the body arc length.

The radius of described ditch shape rear end is 25% of outer rim radius at least; Described brill core thickness is the 40-80% that carries on the back arc length clearly, preferably carries on the back 36% of arc length clearly, and perhaps described brill core thickness is the 25-70% of outer rim radius, preferably 50% of the outer rim radius.

There is changeless radius described ditch shape bottom or the ditch shape rear end that is convex; Perhaps, all there is changeless radius ditch shape bottom and ditch shape rear end, and the ratio of the two is in the 0.7-1.3 scope.

Described ditch shape front end is spill; Described land axis along the longitudinal extends with the circular arc between the 40-80 degree; The described clear back of the body is coaxial with longitudinal axis;

The side of the described clear back of the body, land combines with the Qing Bei district by changeover portion; Described changeover portion be linearly shape or arc.

The tangent line of the joining of each clear back of the body and each ditch shape rear end is identical; Perhaps, the tangent line of the joining between each ditch shape rear end and each the ditch shape bottom is identical; Perhaps, the tangent line in the crosspoint is identical to each clear back of the body with each ditch shape rear end and ditch shape bottom with the tangent line of each ditch shape rear end in the crosspoint.

Comprised also wherein increasing a groove and the land that links to each other at least that wherein each is pressed along the longitudinal axis extension of the handle of helical angle extension groove and land, forms many to adjacent trenches and land along handle.

Described cutter comprises a kind of in drill bit, screw tap, reamer, slotting cutter, hobboing cutter or the fluted drill.

The described clear back of the body has the tapering that changes radius along its length.

A, comprise the groove that extends by spiral angle along the longitudinal axis of axle, wherein groove has the ditch shape front end that extends internally from the outer rim radius and the ditch shape bottom of adjoining mutually with ditch shape front end;

The minimum widith of the longitudinal axis of d, cutter is to bore core thickness, and it is littler than clear back of the body arc length;

Wherein also comprise: the described clear back of the body has the tapering that changes radius along its length; Perhaps, described brill core thickness is about 50% of outer rim radius; Perhaps, the tangent line of the joining of described each clear back of the body and each ditch shape rear end is identical; Perhaps, the tangent line in the crosspoint is identical to described each clear back of the body with each ditch shape rear end and ditch shape bottom with the tangent line of each ditch shape rear end in the crosspoint; Perhaps, described cutter is a kind of in slotting cutter or the hobboing cutter.

The utility model is by the improvement to drill bit structure, make drill bit have wammel core thickness and also have the flowability of improving cooling fluid and smear metal when guaranteeing maximum transverse strength, and can on workpiece, process ability greater than the hole of the outside diameter 4-5 times degree of depth.

Description of drawings

Fig. 1 is the big image of obtaining according to the utility model such as grade;

Fig. 2 is according to front view of the present utility model;

Fig. 3 is the side view of Fig. 2;

Fig. 4 is the summit enlarged view of Fig. 2;

Fig. 5 is the profile that Fig. 2 obtains according to v-v;

Fig. 5 A is the correction figure of Fig. 2 according to v-v gained profile, is used for showing the alternately phenomenon of drill bit;

Fig. 6 is that illustration 2 is according to VI-VI direction gained profile;

Fig. 7 be emery wheel according to certain inclination angle near but also have the certain distance sketch plan apart from the finished product cutter;

Fig. 8 key diagram 7 medium plain emery wheels and cutter are separated each other, to highlight their feature;

Fig. 9 key diagram 7 medium plain emery wheels and cutter are separated each other, to highlight their feature;

Figure 10 represents that cutter links to each other with another among view that emery wheel is obtained according to certain inclination angle and Fig. 7;

Figure 11 is the alternately phenomenon of emery wheel;

Figure 12 is that pressure roller influences the sketch plan that emery wheel forms swiveling wheel;

Figure 13 is Figure 12 medium plain emery wheel and pressure roller and another arrangement that is separated, to highlight its feature.

The specific embodiment

Cutter

The utility model is the cutter that has spiral grooves and have curve-like ditch shape rear end at a kind of.For convenience of explanation, will be that example is discussed with the fluted drill, the utility model also can be used for other the cutter with spiral grooves, slotting cutter for example, screw tap, reamer, hobboing cutter.These cutters can have or not have the end sword of contact and cutting workpiece.

Shown in Figure 1 is a kind of cutter 10, and for the ease of discussing, this cutter is the fluted drill with longitudinal axis 20 and axle 15.Axle 15 has an end sword 25 with contact and cutting workpiece (not shown) ability, and axle 15 has outer surface 30, in Fig. 5, has shown 35, one lands 40 of a groove and the ditch shape rear end 45 between them on the cross section of this outer surface 30.

In the rear end 27 of axle 15 is to be generally the non-columned shank of tool 29 cylindric or that cooperate with the chuck (not shown).Although it is columniform that handle 29 is described as in the drawings, should be clear and definite be that handle 29 may be that square, hexagon, taper shape or other are fit to the shape of the non-cylinder that cooperates with chuck.

In addition, when handle 29 when being cylindrical, its radius may be greater than or less than the radius of axle 15.

Groove 35 by helical angle HA (Fig. 2) axis 20 extensions longitudinally, is noted Fig. 1 and Fig. 5 by axle 15, and groove 35 is made up of ditch shape front end 50 that extends internally along outer rim radius OR and the ditch shape bottom 55 of adjoining ditch shape front end 50.

Land 40 adjoins mutually with groove 35, and by helical angle HA longitudinally axis 20 extend one section arc length LD relevant, one section 50 circular arc of spending of arc length LD correspondence with cutter 10.Land 40 has a land 60, and the radius MR of land 60 equates with outer rim radius OR.Land 40 also has a Qing Bei district 65 that adjoins mutually with land 60, and Qing Bei district 65 is being the outer surface inside of boundary with outer rim radius OR.As shown in Figure 1, there is the clear back of the body radius C R littler than outer rim radius OR in Qing Bei district 65.But Qing Bei district 65 also can be a cone that radially changes with radius C R.

Shown in Fig. 1-6, cutter 10 has two grooves that radially extend.What should be noted that is that the utility model goes for having on the drill bit of single groove or a plurality of groove (such as 2,3,4 or more groove).Have under the situation of single groove 35, land 40 extends to cutting edge 70 around cutter 10 from groove 35.In Fig. 5, because two grooves are arranged, land 40 adjoins mutually with the ditch shape front end 52 that adjoins groove 37, and intersects to form cutting edge 70 mutually.

Ditch shape rear end 45 is connected with the ditch shape bottom 55 of the groove 35 that adjoins Qing Bei district 65, thereby for providing a continuous surface between Qing Bei district 65 on the land 40 and the ditch shape bottom 55.The radius HR of ditch shape rear end 45 is about the 15-75% of outer rim radius OR.

Among Fig. 5, land 40 is defined as on cutter 10 outer rims from the distance L D at the edge 75 in cutting edge 70 to Qing Bei districts 65.The circular arc of corresponding one section relative longitudinal axis 20 angle of the distance L D of land 40 between 40-80 °, the brill core minimum thickness W of cutter 10 on longitudinal axis 20 is less than the arc length PD in Qing Bei district 65.

75 initial till cutting edge 70 from clear back of the body edge along the clear back of the body arc length PD in Qing Bei district 65, its corresponding one section arc angle is about 40 ° arc.

Ditch shape back-end radius HR is 25% of outer rim radius OR at least, and in addition, the bradawl core thickness W of axle 15 should be along the 30-80% of the arc length PD in Qing Bei district 65.

The bradawl core thickness W of axle 15 also can be the 25-70% of outer rim radius OR, is preferably about 50% of exradius OR.

Expression in another way, the bradawl core thickness W of axle 15 is preferably along about 36% of the arc length PD in Qing Bei district 65.

Changeless ditch shape bottom radius NR is arranged at ditch shape bottom 55, and in addition, ditch shape back-end radius HR also should be changeless.For this reason, no matter bore core and whether ditch shape rear end 45 might have changeless radius separately, the radii fixus of each ditch shape bottom 55 and ditch shape rear end 45 should equate, i.e. NR=HR.Yet the ratio of ditch shape bottom radius NR and ditch shape back-end radius HR is preferably between 0.7 and 1.3.

Ditch shape front end 50 among Fig. 5 is the inner concave curves with radius LR.Yet, in Fig. 4, show that from front end 25 profile of the projection 80 of ditch shape front end 50 is straight lines.Under certain conditions, for the cutting edge 70 that makes cutter 10 has positive rake angle, the profile of projection 80 also can be crooked.

Among Fig. 5, Qing Bei district 65 should be concentric with longitudinal axis 20 with clear back of the body radius C R, thereby for land 60 back cutting edge 70 is structurally provided support.This structure is just in time opposite with the parabola drill bit, and the clear back of the body radius of parabola drill bit successively decreases away from cutting edge 70.

During transition, transition region 85 can be a straight line between land 60 and Qing Bei district 65, extends to longitudinal axis 20 generally speaking.Transition region 85 also can tilt between land 60 and Qing Bei district 65 (Fig. 5 A), and also can be curve or straight line.

Qing Bei district 65 and ditch shape rear end 45 are should be in the Qing Bei district 65 tangent with joining 90 places of ditch shape rear end 45, and making like this can continuous bend between Qing Bei district 65 and the ditch shape rear end 45.In addition, ditch shape rear end 45 also should be at joining 95 places tangent (Fig. 5 A) with ditch shape bottom 55.In order between land 40 and groove 35, to form continuous surface, Qing Bei district 65 and ditch shape rear end 45 are should be in the Qing Bei district 65 tangent with joining 90 places of ditch shape rear end 45, and ditch shape rear end 45 and ditch shape bottom 55 in ditch shape rear end 45 with joining 95 places of ditch shape bottom 55 equally should be tangent.Therefore, the outer surface 30 that forms between Qing Bei district 65, ditch shape rear end 45 and ditch shape bottom 55 should be continuous.Qing Bei district 65 can be identical with ditch shape rear end 45, and ditch shape rear end 45 also can be identical with ditch shape bottom 55 tangent lines in joining 95.Therefore, the outer surface 30 of Qing Bei district 65, ditch shape rear end 45 and 55 formation of ditch shape bottom can be continuous.

What Fig. 1-5 showed is the fluted drill 10 with two grooves.Cross just as mentioned before, should be noted that it is that purport of the present utility model is not limited to two grooves, a groove and a plurality of groove meet purport of the present utility model equally.In if extra groove also is comprised in, so, the drill bit in the theme just will comprise extra a pair of groove and land.Wherein each extends along the longitudinal axis 20 of axle 15 by helical angle HA groove and land, forms more to along spools 15 groove and lands adjacent one another are.

Fig. 6 is the profile that VI-VI sees along the direction of arrow among Fig. 2, is the shape of asymmetric cross section, is by the section of certain angle intercepting from this drill bit.The unique zone that can obtain the symmetric arrays section is along arrow V-V direction and perpendicular to the section of longitudinal axis 20.

For the diameter of drill bit is a kind of situation of 0.50 inch, should use following size:

Spiral angle (HA)=30 °

Exradius (OR)=0.250 inch

Ditch shape back-end radius (HR)=0.092 inch

Ditch shape bottom radius (NR)=0.098 inch

Clear back of the body radius (CR)=0.241 inch

Land radius (MR)=0.250 inch

Ditch shape front-end radius (LR)=0.420 inch

Bore core thickness (W)=0.134 inch

The employed emery wheel of process tool

Past, the cutter with the spiral grooves and the land that links to each other generally by two independently emery wheel process through two independently grinding steps.

Just as mentioned before, not only lose time with two steps, but also will be tool compensation after first emery wheel operation, this is very crucial.Spiral grooves just can parallel with another with the land that links to each other like this.If there is not this relation, it is defective that cutter will be considered to, thereby be dropped.

Inventor of the present utility model has designed an independent emery wheel can processing the spiral grooves and the land that links to each other on a cutter simultaneously.This design has not only improved the process velocity of cutter, has more improved the cutter machining accuracy, thereby has eliminated owing to groove and the land waste product that produces not parallel to each other.

Fig. 7 is the emery wheel 110 that has the helical tooth blade 10 of longitudinal axis 20 on the processing axle 15.Handle 29 (not shown)s can be columniform can not be columniform also.Cutter shaft 15 has front end 25, and is made up of the groove 35 with radial depth 97 (Fig. 5).Groove 35 extends along 20 directions of the longitudinal axis on the axle 15 by pressing spiral angle HA.Land 40 adjoins mutually with groove 35, and wherein groove 35 has the ditch shape front end 50 that extends internally along outer rim radius OR, and ditch shape front end 50 adjoins ditch shape bottom 55 (Fig. 1).Each land 40 has the land 60 that adjoins ditch shape front end 50, and the radius MR that equates with outer rim radius OR is arranged.Qing Bei district 65 adjoins mutually with land 60, and Qing Bei district 65 and ditch shape bottom 55 is connected by ditch shape rear end 45.

See Fig. 7 again, emery wheel 110 is by having disc centre line 117, extending to the maximum radius GR of outermost end 157 radially and the disk 115 of longitudinal axis 118 and average radial dimension is formed.This disk 115 has first side 120 and second side 125 on the other side, has defined a width G W between this two sides.The outer rim 130 of disk is extended between side 120 and 125.The removing material that grinding knife tool 10 is arranged on side 120,125 and the outer rim 130.A kind of like this removing material can be numerous removing materials any that is used for grinding, includes, but are not limited to carborundum (for example, square boron nitride, aluminum oxide, diamond).Typical emery wheel 110 can be made up of resin-bonded material, such as diamond.Resin-bonded material is applicable to the situation that comprises bump and deflection deformation, and therefore, this structure has enough intensity it can be operated effectively at wheel face under the condition of lower speed and horsepower.In addition, also can select emery wheel with metal bonding.

Fig. 8 is the side view of typical emery wheel 110, and is identical with purport of the present utility model, and to a certain extent, the emery wheel 110 of any structure can be discussed.

The edge 130 of emery wheel 110 is used to the groove 35 and the land 40 of process tool 10, and for this reason, the concrete position on these cutters 10 will be from 100 open numberings.

Outer rim 130 comprises the ditch shape front end shaping district 150 with curve shape, and laterally also further extend away from the direction of center line 117 with the radial distance GR that equals groove 35 radial depths 97 from first side 120 in ditch shape front end shaping district 150.

District 155 and the ditch shape front end district 150 that is shaped that is shaped, ditch shape bottom adjoins mutually, and horizontal and extend internally towards the direction of disc centre line 117 to second side 125.

The clear back of the body district 165 that is shaped is convex, and extend to second side, 125 directions in the district 155 of being shaped from ditch shape bottom.The clear back of the body is shaped and distinguishes 165 8 times of bigger radiuses that have than cutter outer rim radius OR.

Land shaping district 160 is shaped district's 165 beginnings to the extension of second side, 125 directions from the clear back of the body, and further, it is to extend internally towards disc centre line 117 directions.

A kind of situation, 157 places in the crosspoint, the slope in ditch shape front end shaping district 150 and the slope of ditch shape bottom 155 can be unequal.

Parallel with first side 120 near the zone 152 in the ditch shape front end shaping district 150 of first side 120.

As mentioned before, the back of the body is shaped and distinguishes 165 8 times of bigger radiuses that have than cutter outer rim radius OR clearly, and the clear radius of carrying on the back the district 165 that is shaped should be 8-50 a times of outer rim radius OR.In addition, the be shaped radius in district 165 of the clear back of the body also can be infinitely-great, is types linearly thereby make the district 165 that is shaped of the back of the body clearly.

Clear back of the body shaping district 165 is subjected to 167,169 constraints of two summits.Article one, connecting the be shaped line on these two summits 167,169 in district 165 of the clear back of the body has defined one and has been about 0-150 ° angle as dorsal horn CA clearly with the straight line 170 that is parallel to disk 115 center lines 117.In addition, be 18 inches emery wheel for radius GR, common clear dorsal horn is 10 degree.

Shaping district, ditch shape bottom 155 is convex, and its radius is 8-50 a times of outer rim radius OR.The radius in shaping district, ditch shape bottom 155 also can be infinitely great, thereby make linearly type of zone 155.

Land shaping district 160 is curved shapes, and its radius is 8-50 a times of outer rim radius OR.Shaped form can be convex, spill or straight, and this demand on the changeover portion between the clear back of the body of cutter and the land is decided.As mentioned before, the radius in land shaping district 160 can be infinitely-great, thereby has formed as the straightway among Fig. 8.

The district 155 that is shaped from ditch shape bottom, shaping district 145, ditch shape rear end extends to clearly the back of the body district 165 that is shaped laterally and towards second side 125.Shaping district, ditch shape rear end 145 can be spill and be retrained by summit 159,167.Be shaped district 155, ditch shape bottom should equate with the slope of shaping district 145, ditch shape rear end in the intersection.In addition, shaping district, ditch shape rear end 145 also should equate with the slope of the intersection in clear back of the body shaping district 165.

As shown in figure 11, outer rim 130 further comprises a round-corner transition district 175 that is convex, and extend between clear back of the body zone 165 and land shaping district 160 in round-corner transition district 175.

In a kind of form of expression of the present utility model, emery wheel 110 has 9 inches radius and 0.71 inch width.Ditch shape front end is shaped, and extend into radius since first side 120 be 0.24 inch convex for district 150, and wherein ditch shape front end 150 and first side 120, district that is shaped is tangent.Ditch shape front end shaping district 150 extends to the parallel lines of disc centre line 117 tangent always.Shaping district, ditch shape bottom 155 is rectilinear, and extends to center line 117 to be 36 angles of spending with center line 117 from 150 beginnings of ditch shape front end shaping district.Be spill with the 155 shaping districts, ditch shape rear end 145 that adjoin mutually, shaping district, ditch shape bottom, and extend to the point of the most approaching axle 118 with 0.188 inch radius, then away from axle 118 until with the clear back of the body 165 point of contacts of adjoining mutually 167, district that are shaped, be rectilinear and become 4 degree angles with the straight line that is parallel to center line 117 away from the line of axle 118 beginnings.Distance first side 120 is that 0.662 inch position is land shaping district 160, and it is rectilinear, and extends until crossing with second side 125 of disk 115 to the directions that become 4 degree angles with the straight line that is parallel to center line 117.First side 120 and second side 125 of disk 115 all are rectilinear and parallel to each other.

Fig. 1 is the perspective view with the corresponding to cutter 10 of the utility model.Shown in Figure 9ly be identical cutter 10 and be used for the groove 35 of process tool 10 and the emery wheel 110 of land 40 that emery wheel 110 has a segment distance with cutter 10.Yet emery wheel 110 moves the accurate position that certain displacement will just in time be in relative cutter 10.In practical operation, emery wheel 110 enters the outer surface of cutter 10 along A direction among Fig. 9.Yet, it should be noted that emery wheel enters before, groove 35 and land 40 do not form on the main body of cutter 10, is similar to axle 15 zones on Fig. 9 right side.

Figure 10 medium plain emery wheel 110 is positioned on groove 35 and the land 40 fully.In operating process, when emery wheel 110 rotations, axle 15 is pressed arrow R rotation among the figure, moves by arrow F direction simultaneously.Thereby make emery wheel 110 grinding on axle 15 go out spiral grooves 35 and the land 40 that links to each other.

The method of process tool

Independently emery wheel processing spiral grooves is different with the technology of the land that links to each other with two with above-mentioned needs, and one of them embodiment of the utility model is to utilize an emery wheel 110 to process groove 35 and land 40 simultaneously.

Specifically, the utility model has also embodied the method for process tool.In conjunction with Fig. 1 and Fig. 8-10, a kind of method of process tool 10 is disclosed out just as mentioned before.Thereby comprising, the method use 110 pairs of axles 15 of emery wheel to carry out the process that at least grinding processes groove 35 and land 40.When using low horsepower of grinding machine, once Yi Shang grinding is necessary, can strengthen grinding depth at every turn.

This method has further comprised the procedure of processing of carrying out at least grinding with identical emery wheel 110, the ditch shape rear end 45 that this emery wheel will be convex is connected with the clear back ofs the body zone 65 of the ditch shape of groove 35 bottom 55 by land 40, thereby in ditch shape bottom 55 with carry on the back the continuous surface of formation between regional 65 clearly.

In operation, can be used for grinding outer rim radius be 0.25 inch cutter 10 to the emery wheel 110 of 9 inches radiuses.In this case, the speed rotation can per minute 1500-4000 changeed of emery wheel 110.When the rotating speed of emery wheel 110 is a per minute 2000 when changeing, the rate of feed that cutter 10 can per minute 4-6 inch moves axially.Helical angle HA is set on the different grinding machines according to rate of feed, and it is a function of cutter 10 rotary speeies.Yet, thereby different grinding machines need be adjusted adaptation helical angle HA.According to the power of grinding machine, grinding process is made up of grinding of total depth or the repeatedly grinding that strengthens the degree of depth one by one emery wheel.

Next will illustrate to have the mirror image at the edge 130 of emery wheel 110 on the pressure roller 410, this mirror image should be fully opposite with emery wheel 110, thereby the shape of pressure roller 410 is expressed on the emery wheel 110.If emery wheel 110 is that a resin-bonded emery wheel will be highly beneficial,, be more suitable for the regular finishing that repeats because it is soft.

See Fig. 7 again, groove 35 and land 40 have defined helical angle HA around the longitudinal axis 20 of cutter 10, and its angle is preferably in 22 and spends between 38 degree.In Fig. 7, the radius GR of the emery wheel 110 significantly outer rim radius OR than cutter 10 is big, and emery wheel 110 can contact on both tangent points with cutter 10 like this, further acts on the front and back position at point of contact then.Therefore, in order better to control grinding process, emery wheel 110 carries out certain skew with respect to longitudinal axis 118, and the deviation angle OA of emery wheel 110 should be 30 degree-40 degree with respect to helical angle HA.

The another kind of embodiment of the present utility model, the groove 35 and the land 40 of cutter 10 can carry out at least grinding by 110 pairs of axles of emery wheel 15.This emery wheel is connected the ditch shape rear end 45 of convex with the 55 Qing Bei districts 65 by land 40, ditch shape bottom of groove 35, thereby between ditch shape bottom 55 and Qing Bei district 65, form continuous surface, wherein, the radius of ditch shape rear end 45 is the 17%-75% of outer rim radius OR.

The cutter production process

Cutter 10 with groove has been described so far, and for the emery wheel 110 that processes such cutter with groove 10 and the method for process tool 10.

The general notion that is processed with the cutter 10 of spiral grooves is to use single emery wheel 110, and this is considered to unique, therefore, also is unique in the production process about such cutter 10 of this discussion.

Pressure roller

Under desirable processing environment, best emery wheel 110 has self-sharpening, if like this during the abrasive particle rust, they rupture easily and come off owing to grinding force becomes, and show the sharp abrasive particle that makes new advances thus.Although use the high precision machines grinding, although the part realization sometimes of this perfect condition almost can not realize fully.Generally, on accurately being installed to the high-precision grinder main shaft after, emery wheel 110 must periodically be repaired.A kind of the device of this effect can be provided is pressure roller 410, and it can also can contain adamantine the wheel with inside with hardened steel or carbide alloy wheel, and it can freely rotate and have the shape of the requirement that meets emery wheel 110.Pressure roller 410 gradually to the emery wheel feeding, in emery wheel processes in contrast shape by extruding action with lower rotating speed.Pressure roller 410 processes the easy cutting emery wheel with sharp abrasive particle.With the corresponding to emery wheel 110 preferential method for trimming of the utility model are the uses that comprise the pressure roller 410 shown in Figure 12,13.

Just as seen, the profile of pressure roller 410 is mirror images of emery wheel 110 outward flanges 130.

At Figure 12 and 13, and the details about cutter of Fig. 1, a kind of pressure roller 410 that is used for trimming wheel 110 is disclosed, its medium plain emery wheel 110 is used to process aforementioned helical tooth blade 10.Pressure roller 410 comprises disk 415 and the average radial distance CR with disc centre line 417.Disk 415 has first side 420 and second side 425, and these two sides have determined width C W and the disk outer rim 430 between side 420,425 between them.Abrasive material and outer rim 430 that outer rim 430 has trimming wheel 110 have the tool shaped profile.This shaped profile is spill and from 420 horizontal expansions of first side, extends to disc centre line 417 along the radius that equates with groove 35 radial depths simultaneously.This shaped profile has further comprised the close ditch shape front end district 455 that is shaped, the ditch shape bottom in district 450 that is shaped, and ditch shape bottom is shaped district 455 to 425 horizontal expansions of second side, stretches out away from disc centre line 417 simultaneously.Extend from ditch shape bottom 455 to second side 425 in clear back of the body shaping district 465, and have the big 10 times radius of outer rim radius OR than cutter 10.Land shaping district 460 stretches out away from disc centre line 417 to the 425 extension whiles of second side from clear back of the body shaping district 465.

As shown in figure 13, the profile of the outer rim 430 of pressure roller 410 is mirror images of the outer rim 130 of emery wheel 110.

457 places in the crosspoint, the slope in ditch shape front end shaping district 450 and the slope of ditch shape bottom 455 can be unequal.

In addition, ditch shape front end is shaped in the district 450 be nearest one section 452 away from first side 420 and can be parallel to first side 420.The 8-50 of the outer rim radius OR that the clear radius of carrying on the back the district 465 that is shaped should be a cutter 10 doubly.Perhaps, clear back of the body shaping district 465 has infinitely-great radius, thereby forms a linear zone.Straight line is connecting be shaped two end points 467 and 469 and defined the straight line 470 parallel with the center line 417 of disk 415 and be the pressure roller clear dorsal horn CCAs of 0 degree to 15 degree in district of the clear back of the body.

For average radial size CR is 4 inches pressure roller, and preferred clear dorsal horn degree CCA is 10 degree.

Ditch shape bottom 455 can be concavity, its radius be cutter 10 outer rim radius OR 8-50 doubly.Perhaps, ditch shape bottom 455 equally also can have an infinitely-great radius, thereby forms a linear zone.

The land district 460 that is shaped can be spill, its radius be cutter 10 exradius OR 8-50 doubly.With the same before, this radius can be infinity, thereby forms a linear zone.

Pressure roller 410 should further comprise the district 455 of being shaped from ditch shape bottom towards second side 425 to the clear back of the body shaping districts, ditch shape rear end 445 that are convex that district 465 tilts to extend that are shaped.The radius in shaping district, ditch shape rear end 445 is the 50-100% of the outer rim radius OR of cutter 10.Shaping district 455, ditch shape bottom and the slope of shaping district 445, ditch shape rear end at joining 447 places can equate.In addition, shaping district, ditch shape rear end 445 can equate with clear back of the body shaping district 465 slopes at joining 467 places.

See Figure 11 again, emery wheel 110 may comprise a round-corner transition district 175, so pressure roller 410 may comprise the round-corner transition district, and it is spill, and is shaped and extends between the district 460 at be shaped district 465 and land of the clear back of the body.

Described the cutter 10 of the groove 35 with spiral angle, wherein the Qing Bei district 65 of the ditch shape bottom zone 55 of groove 35 and land 40 is connected by the ditch shape rear end 45 that is spill before.

In addition, disclose this cutter 10 that uses this single emery wheel 110 to process, and disclose the method for using such emery wheel 110 by grinding at least once.At last, the pressure roller 410 that is used for trimming wheel 110 is disclosed.

The utility model is described with reference to preferred result, can significantly revise and select by reading with detailed before description.Comprise claim or equal therewith interior all modifications and the selection of scope, all mean it is creation of the present utility model.

Claims

1. a helical tooth blade of improveing ditch shape comprises the axle with longitudinal axis, and axle also comprises a front end and an outer surface; From having the cross section of a segment distance, it is characterized in that outer surface comprises following structure with the longitudinal axis vertical direction and with front end:

B, the land that adjoins groove extend by the spiral angle direction along the longitudinal axis of axle, and wherein land has the land that adjoins ditch shape front end, and land has the radius that equates with the outer rim radius; Land has the Qing Bei district that adjoins land, and takes all of week in the outer rim radius;

2. the helical tooth blade of improvement ditch shape according to claim 1 is characterized in that the radius of described ditch shape rear end is 25% of outer rim radius at least; Described brill core thickness is the 40-80% that carries on the back arc length clearly, preferably carries on the back 36% of arc length clearly, and perhaps described brill core thickness is the 25-70% of outer rim radius, preferably 50% of the outer rim radius.

3. the helical tooth blade of improvement ditch shape according to claim 1, there is changeless radius the ditch shape rear end that it is characterized in that described ditch shape bottom or be convex; Perhaps, all there is changeless radius ditch shape bottom and ditch shape rear end, and the ratio of the two is in the 0.7-1.3 scope.

4. the helical tooth blade of improvement ditch shape according to claim 1 is characterized in that described ditch shape front end is spill; Described land axis along the longitudinal extends with the circular arc between the 40-80 degree; The described clear back of the body is coaxial with longitudinal axis.

5. the helical tooth blade of improvement ditch shape according to claim 1 is characterized in that the side of the described clear back of the body, and land combines with the Qing Bei district by changeover portion; Described changeover portion be linearly shape or arc.

6. the helical tooth blade of improvement ditch shape according to claim 1, wherein the tangent line of the joining of each clear back of the body and each ditch shape rear end is identical; Perhaps, the tangent line of the joining between each ditch shape rear end and each the ditch shape bottom is identical; Perhaps, the tangent line in the crosspoint is identical to each clear back of the body with each ditch shape rear end and ditch shape bottom with the tangent line of each ditch shape rear end in the crosspoint.

7. the helical tooth blade of improvement ditch shape according to claim 1, it is characterized in that also comprising and increased a groove and the land that links to each other at least, wherein each is pressed along the longitudinal axis extension of the handle of helical angle extension groove and land, forms many to adjacent trenches and land along handle.

8. the helical tooth blade of improvement ditch shape according to claim 1 is characterized in that comprising a kind of in drill bit, screw tap, reamer, slotting cutter, hobboing cutter or the fluted drill.

9. the helical tooth blade of improvement ditch shape according to claim 1 is characterized in that the described clear back of the body has the tapering that changes radius along its length.

10. a helical tooth blade of improveing ditch shape comprises the axle with longitudinal axis, and axle also comprises a front end and an outer surface; From having the cross section of a segment distance, it is characterized in that outer surface comprises following structure with the longitudinal axis vertical direction and with front end: