CN108213617B - The cutting element and cutting insert of thread-whirling processing - Google Patents

Abstract

The present invention relates to thread-whirling processing cutting element and cutting inserts.In thread-whirling processing cutting element, its exchanging operation is just able to carry out when after rake face side is ground again that the cutting insert is fixed to cutter body, not needing the cutting edge of cutting insert to adjust position of tool tip again.Cutting insert is formed as the plate of isosceles trapezoid, using the interior angle between bottom and each waist as nose angle, and there is the cutting edge of rake face including the end in bottom, the retaining part of cutter body includes: the first constraint wall surface, and the rake face side surface of cutting insert is constrained as the first restrained face；And second constraint wall surface, it constrains the minor flank side surface of cutting insert as the second restrained face, by pressing the first restrained face to the first constraint wall surface respectively, the second restrained face, when Lai Shixian cutting insert is fixed, point of a knife the positioning on projected direction are pressed to the second constraint wall surface.

Description

The cutting element and cutting insert of thread-whirling processing

Technical field

It is cut the present invention relates to cutting element used in a kind of screw thread process using thread-whirling and suitable for this Cut the cutting insert of tool.

Background technique

External screw thread (hereinafter also referred to " screw thread ") is formed in the outer peripheral surface as the shaft component (pole) for being cut material There are a variety of methods in processing method, thread-whirling processing method is one such method.The processing method is as follows: making as quilt While cutting shaft component (raw material) low speed rotation (such as 5rpm~50rpm) of material, in the case where it rotates a circle The amount of 1 lead of screw thread to be formed (1 screw thread) is fed along axis direction, on the other hand, makes 1 or multiple The cutting edge (point of a knife) of cutting insert (or tool) is big in the outer diameter than shaft component and such circular orbit is inscribed with shaft component On along identical direction of rotation high speed rotation (such as 2000rpm~7000rpm), on the circular orbit 1 at, in order to obtain with Cutting on the corresponding direction of the lead angle of screw thread, have gradient corresponding with the lead angle in the state of, with The corresponding approach of thread carries out interrupted cut.According to the processing method, due to can under the primary feed of shaft component The chasing in the prescribed limit from its top towards rear, can be consequently used for the higher screw thread of thread, reach compared with In the screw thread process of the larger such structure of long screw thread or lead.

In addition, the cutting element used in above-mentioned thread-whirling processing (is cut by cricoid cutter body is formed as Tool body) it is installed on the spindle nose of processing equipment.On the other hand, one or more cutting inserts of screw thread process are with such as lower section Formula is positioned and secured to the specified position for being formed as cricoid cutter body (retaining part), i.e., makes knife in the cricoid inside Point is prominent to the incision direction as the shaft component for being cut material.Basic structure for fixing above-mentioned cutting insert has such as Flowering structure: it for example, cutting insert to be fixed on to the retaining part (truss) that can be installed on the retainer of cutter body, will be fixed with The retainer of cutting insert is fixed on the specified position (retainer mounting portion) of cutter body.In the fixation of above-mentioned retainer, By the screw threads for fastening etc. using bolt, its fixed bit is adjusted accordingly with the outer diameter (threading path) of the shaft component to be processed etc. It sets, to carry out the adjustment of position of tool tip (radially, circumferentially), positioning.In addition to this it is also known that there are: using have position of tool tip tune The retainer of engagement positions will be equipped with component made of cutting insert on the retainer and be fixed on cutter body, and utilize guarantor It holds adjustment device possessed by frame and carries out the adjustment.

The above-mentioned cutting insert for being used in screw thread process have cutting edge, the cutting edge for example formed as parallelogram, The polygons plate such as trapezoidal, triangle has rake face, minor flank across its acute angle corner portions (point of a knife).For it is above-mentioned in this way Cutting insert for, for example, passing through face (plate in the plate-like portion by cutting insert, to the fixed base portion of retaining part Interarea) be close to the bottom surface of the retaining part (truss) in retainer, by with the face of rake face opposite side (bottom surface of base portion) It is close to the main basal base face of truss, and by another pedestal with the face of minor flank opposite side (back side of base portion) and truss Face is close to, and Lai Jinhang positions and fixes (patent document 1, patent document 2).Also, in porose cutting insert, this is fixed Usually realized by making the screw member be disposed through the hole of the plate interarea and being screwed into the threaded hole of bottom surface of truss.

In addition, leading to cutting edge of a knife or a sword in the abrasion of the point of a knife due to cutting insert, generation of notch etc. in thread-whirling processing In the case where sharp degree decline, there are used the throw away mode just thrown away and ground cutting edge again and (be ground again) with extensive Multiple sharpness reuses mode.In lapping mode again, can with the amount of grinding of the cutting insert application to new (unused), Grind number correspondingly implementation tool life-time dilatation.The cutting edge for grinding and (hereinafter referred to as grinding) again as described above and use The grinding of knife, the usually plane lapping of rake face.The reason is that for the cutting edge in the cutting insert of chasing For, flank that the shape (point of a knife shape) from rake face when cutting edge forms cutting edge is formed as and to be processed Corresponding convex (convex-concave) shape of thread, thread groove (if for example, angular thread is then triangle) can not be put down using simple Face is ground to cope with, and can use plane lapping in the grinding of rake face to cope with.

Existing technical literature

Patent document

Patent document 1: Japanese Unexamined Patent Publication 10-58233 bulletin

Patent document 2: Japanese Unexamined Patent Publication 2008-296311 bulletin

Summary of the invention

Problems to be solved by the invention

However, in the case where grinding the rake face of the cutting insert of above structure again, due to the material of point of a knife part Be removed amount corresponding with amount of grinding, thus the rake face of the cutting insert after grinding reduced than the face before grinding (originally) and The corresponding height of the amount of grinding being removed.On the other hand, the cutting edge in the cutting insert of chasing, rake face are formed Angle (hereinafter referred to as " nose angle ") with cutting edge formed by minor flank is usually acute angle.Therefore, if grinding above-mentioned cutting edge, Then point of a knife is displaced (retrogressing) to the direction for leaving point of a knife than the original position before grinding.Therefore, if inlaying the cutting ground again Knife returns to the retaining part (the original position of truss) of retainer, and as described above by the face with rake face opposite side (bottom surface) is close to the main basal base face of truss, and by another pedestal with the face of minor flank opposite side (back side) and truss Face is close to be positioned, then the position of point of a knife is from the original position (position of tool tip) before grinding to bottom surface (lower section) side and back Surface side (rear) is displaced amount corresponding with amount of grinding, becomes the position of tool tip different from before grinding.It therefore, although will basis It is required that machining accuracy or the amount ground again depending on, but can not directly use sometimes.

The reason is that assigning cutting edge appropriateness that will utilize as the common screw chasing processing using turning Incision traverse feed and in the processing method that is repeatedly repeated in a manner of gradually increasing incision of the cutting that carries out, even if Position of tool tip has a little difference, can also be coped with by making the variation of its cutting output, and without on the image of Buddha in thread-whirling processing State such reply.That is, as thread-whirling processing, in order to obtain amount corresponding with the height of thread since most It cuts and terminates to process in such screw thread process mode by a traverse feed, the displacement of the position of point of a knife will affect processing Size (precision).

Therefore, in the case where returning to retainer after grinding the cutting insert of above-mentioned location structure again and fixing, lead to Often, after its fixation, need to adjust fixation position of the retainer relative to cutter body.Also, when due to grinding again every time all Need to carry out above-mentioned adjustment operation, therefore in the case where use after grinding again, the adjustment activity duration increases, and leads to cutting edge Exchanging operation so that processing efficiency decline.In addition, even if using knife can be carried out using adjustment device possessed by retainer The retainer with position of tool tip adjustment device of the fine tuning of point, can not omit adjustment operation itself.

The object of the present invention is to provide a kind of cutting element of thread-whirling processing (hereinafter referred to as cutting element or Referred to as tool) and suitable for the tool cutting insert, be used in thread-whirling processing cutting element in, will The cutting edge of cutting insert grind again after the cutting insert it is fixed to cutter body when, the tune of position of tool tip again can be omitted It is whole, so as to it is simple, promptly carry out the exchanging operation.

The solution to the problem

Invention described in technical solution 1 is a kind of cutting element of thread-whirling processing, it includes: be formed as cricoid Cutter body；Cutting insert, be fixed on the retaining part of the cutter body, or is fixed on and can be adjusted with installation site Mode is installed on the retaining part on the retainer of the cutter body, by the cutting insert with the point of a knife of its cutting edge in the cutter The mode of the prominent specified amount of the incision direction of lateral cut material material positions in the ring-type of main body, which cuts The tool of cutting is characterized in that,

The cutting insert includes the cutting edge and the base portion fixed to the retaining part, constitutes the cutting edge Angle, that is, nose angle between rake face and minor flank is formed as acute angle, the rake face side surface in the rake face and the base portion It is formed in a manner of being similar to an imaginary plane, and there is the defined amount of grinding for grinding again, also,

For the minor flank side surface in the base portion, when indicating the nose angle, along the minor flank side The angle between straight line and the rake face that surface is drawn is formed as identical as the angle of the nose angle,

The retaining part includes: the first constraint wall surface, is come the rake face side surface as the first restrained face It is constrained；And second constraint wall surface, the minor flank side surface is constrained as the second restrained face,

By pressing the first restrained face to the first constraint wall surface respectively, Xiang Suoshu second constrains wall surface pressing The second restrained face, the cutting insert of Lai Shixian is to point of a knife when the fixation of the retaining part, described prominent Positioning on direction.

The cutting element of invention thread-whirling processing according to technical solution 1, feature described in technical solution 2 It is, the rake face of the cutting insert and the rake face side surface in the base portion are formed as in a plane.

The cutting element of the thread-whirling processing according to technical solution 1 or 2 of invention described in technical solution 3, It is characterized in that, the minor flank of the cutting insert and the minor flank side surface in the base portion are formed as in one Plane.

The cutting of the thread-whirling processing according to any one of technical solution 1~3 of invention described in technical solution 4 Tool, which is characterized in that the cutting insert has two identical cutting edges with such as flowering structure, that is, the cutting insert shape As the plate of isosceles trapezoid, using the interior angle between the bottom of the isosceles trapezoid and each waist as nose angle, at the both ends of the bottom It is respectively provided with rake face.

Invention described in technical solution 5 is a kind of cutting insert comprising cutting edge and fixed to retaining part Base portion, the cutting insert be characterized in that,

It constitutes the angle between the rake face of the cutting edge and minor flank i.e. nose angle and is formed as acute angle, the rake face and institute The rake face side surface stated in base portion is formed in a manner of being similar to an imaginary plane, and has the regulation for grinding again Amount of grinding, also,

For the minor flank side surface in the base portion, when indicating the nose angle, along the minor flank side The angle between straight line and the rake face that surface is drawn is formed as identical as the angle of the nose angle,

The rake face side surface and the minor flank side surface be formed as to the retaining part when fixed by about Beam face.

The cutting insert according to technical solution 5 of invention described in technical solution 6, which is characterized in that the cutting edge The rake face of knife and the rake face side surface in the base portion are formed as in a plane.Invention described in technical solution 7 The cutting insert according to technical solution 5 or 6, which is characterized in that the minor flank and the base of the cutting insert Minor flank side surface in portion is formed as in a plane.Invention described in technical solution 8 is according in technical solution 5~7 Described in any item cutting inserts, which is characterized in that the cutting insert has two identical cutting edges with such as flowering structure, That is, the cutting insert is formed as the plate of isosceles trapezoid, using the interior angle between the bottom of the isosceles trapezoid and each waist as knife Angle is respectively provided with rake face at the both ends of the bottom.

In the cutting insert (cutting insert of screw thread process) of the application, for minor flank, due to add The screw thread of work be, for example, trapezoidal thread in this way, the lowest point of screw thread (thread groove) it is parallel with the axis of screw thread, therefore have processing In the cutting edge of the lowest point, parallel with axis end cutting edge, the flank of the end cutting edge is minor flank, but such as exists Processing such as angular thread, as round thread, cutting edge used in the screw thread of not parallel the lowest point it is such, rake face Point of a knife top be formed as angle, circular arc in the case where, its top is known as end cutting edge, will the corresponding end cutting edge rear knife Face is as minor flank.

The effect of invention

In the cutting element of the invention described in the technical solution 1, in the case where sharpness, which occurs, to be reduced, cutting is removed Cutting insert, in a manner of removing the abrasion of point of a knife, notch equivalent damage part, to the rake face side table in the rake face and the base portion The whole of face carries out plane lapping with identical amount of grinding.In the cutting insert after the plane lapping (grinding again), rake face And the position of the rake face side surface including the first restrained face is correspondingly reduced with amount of grinding, but based on above-mentioned hair Bright structure, by carrying out the positioning on projected direction of the point of a knife to it identically as before grinding, from regardless of grinding How are the size of amount, number, and position of tool tip can all become original position.That is, the cutting insert after grinding make it is second restrained Face constrains wall surface along the second of retaining part from the state before grinding and is slided by the second constraint wall surface guidance, until Until first restrained face is abutted with the first constraint wall surface, distance corresponding with amount of grinding is only moved in parallel like this.Therefore, Position of tool tip after grinding becomes original position.As a result, it is not necessary according to the invention that as in the past when grinding again every time Positioning in being fixed adjusts operation, therefore can simply, promptly make point of a knife back to correct position of tool tip.As a result, It can be realized the exchanging operation of cutting edge or even the high rate of processing.

In addition, in the present invention, as long as the cutting insert with structure described in technical solution 1, even if at this The part of rake face side surface in rake face and the base portion has recess portion, as long as being formed as with an imaginary plane close to i.e. Can, it is both above-mentioned to be formed as in a plane since structure is simple thus preferred as described in technical solution 2.Also, it closes Minor flank side surface in the base portion, when indicating the nose angle, along the straight line of minor flank side surface extraction The size of angle between the rake face is formed as identical as the angle of the nose angle.That is, after pair in the base portion Knife face side surface in a manner of forming angle identical with the front clearance of the minor flank, be formed as when indicating the nose angle with It is both above-mentioned to be not necessarily in same in the straight line parallel or on the same line that the minor flank is drawn In plane.But be formed as as described in technical solution 3 in a plane since structure is simple thus preferred.

For the positioning of point of a knife, the cutting insert also can have a cutting edge but it is also possible to be such as flowering structure, Two cuttings that is, the rake face is across the rake face side surface, in one plane with point of a knife outside towards each other Sword.It, being capable of simultaneous grinding two cuttings by the plane lapping entirely rake face and rake face side surface if above structure Sword, therefore with identical grinding operation cost, the cutting edge service life can be extended twice, to realize the low cost of cutting insert Change.

And in these cases, as described in technical solution 4, the cutting insert can be formed as the plate of isosceles trapezoid Shape.The reason is that since the bottom surface (trapezoidal upper bottom) opposite with rake face (trapezoidal bottom) is formed as flat with rake face Row, therefore pass through datum level when will grind as the face at the trapezoidal upper bottom as rake face, to realize plane lapping Summary.That is, the plate of such as parallelogram can be formed it into for the cutting insert being used in the present invention Two cutting edges are embodied as using two acute angle as nose angle, but as described in technical solution 4, by being formed as by shape Waist is trapezoidal, can be regenerated two cutting edges by once grinding.

Cutting insert described in 5~technical solution of technical solution 8 is suitable for constituting described in 1~technical solution of technical solution 4 Thread-whirling processing cutting element, be fixed on the retaining part for being formed as cricoid cutter body or be fixed on The mode that installation site can adjust is installed on the cutting insert of the retaining part in the retainer of the cutter body.However, skill Cutting insert described in 5~technical solution of art scheme 8 is applicable not only to constitute the cutting element of thread-whirling processing, also can Suitable for being formed in turning with cutting element (lathe tool) used in the common screw thread process of traverse feed, except utilization Cutting element used in processing except turning.That is, in the case where cutting element is not the cutter body but lathe tool, As the retainer for the lathe tool for constituting it, it is provided with retaining part for inciting somebody to action in the cutting insert fixation for being set to its top end part Two containment surfaces that the rake face side surface and the minor flank side surface are constrained as two restrained faces, in the knot In structure, in fixed to the retaining part, do not need to carry out positioning adjustment work to the point of a knife in fixation when grinding again every time yet Industry, therefore can simply, promptly make point of a knife back to correct position of tool tip.As a result, in the common screw thread using lathe It also can be realized the exchanging operation of cutting edge or even the high efficiency of processing in processing, other processing.

As described above, cutting insert described in 5~technical solution of technical solution 8 is not limited to make in thread-whirling processing With.That is, can also be suitable for the cutting insert using the retainer with following structures, that is, in the retainer of lathe tool The fixed retaining part of cutting insert include: the first constraint wall surface, using the rake face side surface of the cutting insert as One restrained face constrains；And second constraint wall surface, come the minor flank side surface as the second restrained face about Beam, by pressing the first restrained face to the first constraint wall surface respectively, Xiang Suoshu second is constrained described in wall surface pressing Second restrained face, come point of a knife when realizing fixation of the cutting insert to the retaining part, described on projected direction Positioning, the where applicable also in the same manner as described above, can be realized the exchanging operation of cutting edge or even the high efficiency of processing.

Detailed description of the invention

Fig. 1 is the perspective view for illustrating an embodiment example of cutting element for the thread-whirling processing in the present invention.

Fig. 2 is the figure (main view) for being observed from the front the cutting element of thread-whirling processing of Fig. 1.

Fig. 3 is the enlarged drawing of the part P1 of Fig. 2.

The A of Fig. 4 is the right view of Fig. 2, and the B of Fig. 4 is the S1-S1 line cross-sectional view of Fig. 2.

Fig. 5 be illustrate Fig. 1,2 cutting element used in the perspective view of cutting insert of chasing (amplification is three-dimensional Figure).

Fig. 6 is the obtained figure of cutting insert of Fig. 5 from each face, and the A of Fig. 6 is main view when indicating nose angle α (obtained figure when from arrow A1), the B of Fig. 6 obtained figure (when from arrow A2 when being from rake face side Obtained figure), the C of Fig. 6 obtained figure (obtained figure when from arrow A3) when being from minor flank side, figure Obtained figure when 6 D is from bottom surface, the E of Fig. 6 are the central longitudinal section views of the A of Fig. 6.

Fig. 7 be illustrate constitute Fig. 1,2 cutting element cutter body main view.

Fig. 8 be explanation be installed on constitute Fig. 1,2 cutting element cutter body retainer figure (enlarged drawing), Fig. 8 A be main view, the B of Fig. 8 is its right view.

Fig. 9 is the figure for indicating to be fixed on the cutting insert of retainer in the cutting element of Fig. 1, Fig. 2, and the A of Fig. 9 is new knife When stationary state main view, the B of Fig. 9 is the main view of the stationary state after rake face side is ground again.

Figure 10 indicates the cutting insert for being fixed on the other examples of retainer, the stationary state when A of Figure 10 is new knife Main view, the B of Figure 10 are the main views of the stationary state after rake face side is ground again.

Description of symbols

100 thread-whirlings processing cutting element, 101 cutter bodies, 201,501 cutting inserts, 210 cutting edges, 211 knives Point, the rake face side surface in 213 rake faces, 213b base portion, 215 minor flanks, the minor flank side surface in 215b base portion, The base portion fixed to retaining part of 230 cutting inserts, 301 retainers, 310 retaining parts (recess portion), 323 retaining parts Second constraint wall surface, T amount of grinding, α nose angle of the first constraint wall surface, 325 retaining parts.

Specific embodiment

The implementation after embodying the cutting element of thread-whirling processing of the invention is described in detail in referring to Fig.1~Fig. 8 Mode example.Wherein, the cutting element 100 of this example is by being formed as cricoid cutter body 101, cutting insert 201 and in fixation There is the retainer 301 for being installed on cutter body 101 in the state of the cutting insert (hereinafter also referred to as cutting insert) 201 is equal to constitute.It closes It will will be described later in the details of above-mentioned component, for its whole summary (referring to Fig.1~Fig. 4), in this example In son, is formed as the structure for having there are two cutting insert 201 in a manner of point symmetry configuration in main view cutting element 100 (Fig. 2), uses The predetermined bits in the front 103 of cutter body 101 are formed in a manner of point symmetry configuration in the recess portion 105 of installation retainer 301 It sets, is installed in a manner of bolt fastening herein there are two retainer 301.Also, the cutting insert 201 of screw chasing processing with As under type is located in each retainer 301, that is, the point of a knife of the cutting edge of the cutting insert 201 of screw chasing processing is in cutter The prominent specified amount of the incision direction of lateral cut material material (not shown) in the ring-type of main body 101, and point of a knife and cutting element Predetermined size K is kept between 100 rotation center O (referring to Fig. 3).Hereinafter, successively above-mentioned component is described in detail, cutter Each position of main body 101 is formed as point symmetry shape (referring to Fig. 2) under the observation of front, also, two as main member Cutting insert 201 is also mutually the same, two retainers 301 are also mutually the same, also, due to being formed as point symmetry configuration, One is illustrated respectively.

Illustrate fixed cutting insert 201 in the present example first (referring to Fig. 3~Fig. 6 etc.).The cutting of this example is inlayed The global shape of knife 201 is isosceles trapezoid, is formed based on the trapezoidal plate with specific thickness, by the isosceles trapezoid Bottom (the long side in parallel both sides.Side the upper surface of in the A of Fig. 6) and each waist formed by interior angle (acute angle) be used as nose angle α, cut It cuts sword 210 and is formed in above-mentioned each corner.That is, by the face for forming the trapezoidal bottom for clipping acute angle, close each acute angle (angle Portion) position as rake face 213, by it is in the face for forming the trapezoidal waist for clipping the acute angle, close to each acute angle (corner) Position as minor flank 215, to form two cutting edges 210.In addition, in the present example, due to being formed as trapezoidal spiral shell The cutting edge 210 of line processing, therefore being shaped as the point of a knife 211 of rake face 213 corresponds to the screw thread bottom (concave shape) Trapezoidal convex form (referring to Fig. 5, Fig. 6 etc.).But in the present example, for cutting edge 210, by two of trapezoidal plate The material of the acute angle portion of trapezoidal plate is cut into (excision) in right amount so that its acute side becomes skewed in face (plate interarea) 221 (isosceles triangle shape), so that cutting edge 210 is formed in the inclined cut face in the form of outstanding (towards the face of point of a knife 211) 223.As a result, the cutting insert 201 of this example includes the cutting edge 210 correspondingly formed with above-mentioned cutting and except cutting edge Relatively thick base portion 230 other than 210.In addition, the cutting quantity exists (referring to the B of Fig. 6) when from 213 side of rake face Different on two faces 221 of trapezoidal plate (base portion), cutting edge 210 is in amesiality position.But in order to cut Cutting in fixation when sword 210 exchanges makes two cutting edges 210 on thickness (size between two faces) direction of base portion 230 Position is identical, and two cutting edges 210 are formed as point symmetry configuration.In addition, the reason of offset of above-mentioned cutting edge 210, is, By make when screw chasing is processed cutting edge 210 be located at as close possible to be cut the position for rotationally supporting side of material to Improve machining accuracy.

Cutting edge 210 in the cutting insert 201 of this example 213 side of slave rake face observation when shape by with processing screw thread bottom The parallel end cutting edge 210a of screw rod and the main cutting edge 210b of two sides on processing thread inclined-plane constitute, inlayed in above-mentioned cutting Rake face side surface 213b in knife 201 into rake face 213 and base portion 230 assigns the amount of grinding T of appropriateness.Also, even if After the plane lapping, being also capable of forming will not be to screw thread to participate in the cutting edge 210 of the trapezoidal convex form of the rake face 213 of cutting Processing has an impact.That is, the width of end cutting edge 210a when minor flank 215 is with new knife (unused) is to leaving point of a knife 211 Direction (bottom surface (trapezoidal upper bottom) 240 of cutting insert 201) extend, and in order to cut two masters for clipping end cutting edge 210a Keeping constant in the gradient in rake face 213 even if after grinding occurs for sword 210b is cut, has main flank 216 Primary clearance.But according to desired machining accuracy, can also have the primary clearance of minute angle.In addition, cutting edge 210 for The size of incision direction when new knife is correspondingly set to slightly grow with the amount of grinding being given, even if so that it is in rake face Its necessary size is also ensured that after the grinding again of 213 sides.

On the one hand, the rake face 213 of cutting insert 201 and rake face side surface 213b on base portion 230 be in the present example In a plane.On the other hand, the minor flank side surface 215b on base portion 230 is formed as when indicating nose angle α, and becomes The straight line that the rake face 213 is drawn object, the straight line drawn in minor flank 215 connects.As a result, in this example In, the minor flank side surface 215b on minor flank 215 and base portion 230 is formed as in a plane.

The cutting insert 201 of this example is in such a way that screw threads for fastening is fixed on the retaining part of retainer 301, in base The center in portion 230 is provided with for the perforative hole 235 of screw member (pinching screw 250).But since the hole 235 is cut at two It is inverted when cutting the exchange of sword 210 in different trapezoidal faces, therefore the hole 235 is formed in the counterbore for being respectively arranged at two faces 221 Face 233.The hole 235 is the long hole extended on the straight line that the center of the bottom of isosceles trapezoid and bottom are vertically drawn, also, It is formed adjacent to the width of the side at the bottom long hole wider than the width of the side close to bottom.The reason is that due to again When installing after grinding to retainer 301, accordingly make rake face 213 along minor flank 215 to acute angle direction with amount of grinding T-phase (arrow H direction.Referring to Fig. 9) distance corresponding with amount of grinding is moved in parallel, therefore by as above constituting, spiral shell can not be hindered Line fastening, it is ensured that amount of grinding T is larger.In addition, above-mentioned cutting insert 201 does not realize screw threads for fastening merely with pinching screw 250, Part 401 is pressed as described as follows at the position of the close bottom surface 240 of cutting insert 201 to press.Also, in order to make in the pressing It cuts main component and reversed component is fought, and the close angle on the direction of the corner of the cutting edge 210 when with cutting diagonally The position in portion has the inclined surface 243 of plane cutting shape.By the pressing, the displacement of 211 position of point of a knife can be prevented, but In the small processing of cutting resistance, the screw threads for fastening realized using pinching screw 250 is with regard in enough situations, this is not required.

On the other hand, cutter body 101 is installed on processing equipment to be fastened by bolts its mounting surface (back side) 110 Axis (rotary shaft) head SH and there is bolt hole 104 in position, and have and be cut material for be sent to center The outer peripheral surface of (shaft component) perforative through portion 120 has the thickness and shape of appropriateness on the direction rotation axis (rotation center O) As cylindric annular shape (referring to Fig.1~Fig. 4, Fig. 7 etc.).Pacify in the front in the cutter body 101 and to spindle nose SH Face (the front 103 of cutter body 101 of 110 opposite side of mounting surface of dress.The front of Fig. 2), as described above, being configured with point symmetry And it is cut under front is observed to the mode that outer peripheral surface and through portion 120 are open respectively and has been rectangular-shaped and is formed as regulation depth The fixed recess portion 105 of the retainer 301 of degree.Have in the recess portion 105 and erects from flat bottom surface 106 and match relatively in parallel The wall 107,108 set, retainer 301 described below are configured in a manner of by the clamping of above-mentioned two wall 107,108 with shape of taking a seat The bottom surface 106, by using 350 bolt fastening of retainer fixed-use bolt be set to its bottom surface 106 two at threaded hole 109 And it is installed (referring to Fig. 7).

That is, the retainer 301 for being installed on the recess portion 105 of cutter body 101 includes sliding surface 304,305, the sliding surface 304,305 parallel with what is erected from the bottom surface of recess portion 106 and relative configuration walls 107,108 are opposite, in order to carry out cutter body Position on 101 is adjusted, can make retainer 301 by the sliding surface 304,305 along wall 107,108 towards cutter body 101 Outer peripheral surface and through portion 120 direction sliding.Also, the sliding for cutter body 101 in retainer 301 The position of two walls 107,108 in face 304,305, positioned at the relative configuration close to recess portion 105 is provided with long hole 307, keeps Frame 301 is fixed on cutter body 101 after position is adjusted in defined position in the following way, it may be assumed that (keeps screw member Frame fixed-use bolt 350) run through from the long hole 307 and is screwed into above-mentioned threaded hole 109.

On the other hand, which is block that is generally L-shaped and being formed to have specific thickness under the observation of front Shape, the retainer 301 are formed as not from the height outstanding of front (surface) 103 of cutter body 101 and are installed.Also, Retaining part (recess portion) is recessed at the intermediate position opposite with wall 107,108 that is parallel and being oppositely disposed of cutter body 101 310, the cutting insert 201 of above structure makes the plate interarea 221 of the side of trapezoidal plate be seated at the bottom surface 313 of the recess portion 310 And it positions, fix.That is, the retaining part (recess portion) 310 is arranged in the form erected from its flat bottom surface 313, there are two constraints Wall surface i.e. first constrains wall surface 323, second and constrains wall surface 325, which constrains wall surface 325 due to dividing Do not make using the rake face side surface 213b of above-mentioned cutting insert 201 as the first restrained face and by minor flank side surface 215b It is constrained for the second restrained face, therefore is respectively formed as when viewed from the front linear, and formed identical with nose angle α Angle, rake face side surface (the first restrained face) 213b, minor flank side surface (the second restrained face) 215b of cutting insert 201 The constraint of wall surface 325 is constrained by the first constraint wall surface 323, second respectively and realizes the positioning of cutting insert 201, fixation.Cutting insert as a result, 201 are set under the restrained condition: point of a knife 211 being made to dash forward in right amount towards the central portion of the through portion 120 of cutter body 101 Out, the anterior angle with appropriateness, the posture of front clearance are formed, point of a knife 211 and rotation center O is made to keep predetermined size K.

In addition, hole (long hole) 235 by the way that pinching screw 250 to be arranged through the base portion 230 in cutting insert 201 and by its It is screwed into the threaded hole 315 that the bottom surface 313 of the retaining part (recess portion) 310 of retainer 301 is arranged, so that cutting insert 201 is fixed. In addition, in the present example, in order to fix cutting insert 201, as described above, pressing the close bottom of cutting insert 201 using pressing piece 401 The position in face 240.As shown in Fig. 8 etc., which is set to: from 240 side of bottom surface by cutting insert 201 of retainer 301 Position with slide shape insertion, to 213 side of rake face jack up cutting insert 201 in the state of utilize pressing piece fixed-use bolt 450 Bolt fastening is carried out to realize that pressing is fixed.Also, for the pressing, in order to cut main component and reversed component pair It is anti-, and to being located at and plane on the direction diagonally of 210 corner of cutting edge when cutting, being arranged close to the position in corner The inclined surface 243 of cutting shape is pressed.In addition, being provided in the bottom surface 313 of the recess portion of retainer 301 fixed for pressing piece The threaded hole 415 that bolt 450 is screwed into, by the way that pressing piece fixed-use bolt 450 to be disposed through to the hole 410 of pressing piece 401 simultaneously It is fastened and realizes fixation.Wherein, the hole 410 of pressing piece 401 is set in order to cope with and rake face 213 and rake face side table The case where grinding of face 213b correspondingly makes pressing position change and be formed as long hole.

Then, to the folder of the retainer 301 for the cutter body 101 being temporarily fixed on the spindle nose SH for being mounted on processing equipment It holds position (recess portion) 310 and configures cutting insert 201, make rake face side surface 213b as the first restrained face and constrain wall surface by first 323 constraints make minor flank side surface 215b as the second restrained face and are constrained by the second constraint wall surface 325, as described above Like that by 201 screw threads for fastening of cutting insert.Also, as described above, by by 401 bolt fastening of pressing piece in retainer 301, thus will Retainer 301 is fixed in the positioning of cutting insert 201.Also, in order to become the position of the point of a knife 211 in the cutting insert 201 and work The position of the corresponding desired point of a knife 211 of threading path, height of thread to be cut the shaft component of material is (away from rotation center O's Size K), after position of the retainer 301 relative to cutter body 101 is adjusted in the range of long hole 307 of retainer 301, Retainer fixed-use bolt 350 is fastened.Next, obtained Fig. 1, cutting element shown in Fig. 2 100 can be utilized, Carry out thread-whirling processing as in the past.

Also, in its manufacturing procedure, the cutting edge 210 in cutting insert 201 in new knife is caused due to abrasion etc. In the case that sharpness reduces, processing is temporarily ceased, cutting insert 201 is removed from retainer 301, to utilize not used angle The mode that the cutting edge 210 in portion is cut is carried out similarly exchanging for cutting edge 210 with above-mentioned way, and continues to process. Later, in the case where the sharpness of two cutting edges 210 all reduces, cutting insert 201 is removed from retainer 301, with suitable same One amount of grinding carries out plane lapping to the rake face side surface 213b on rake face 213 and base portion 230, to remove two cutting edges The abrasion of 210 point of a knife 211, notch equivalent damage part.Two cutting edges 210 regenerate simultaneously as a result,.Later, by so that the edge Any one cutting edge 210 in knife 201 is used for the mode of screw chasing processing, in the same manner as above-mentioned way, by the cutting insert 201 It is positioned and secured to the retaining part (recess portion) 310 of retainer 301, so as to be further continued for screw thread process.

At this point, in the cutting insert 201 after the plane lapping (grinding again), rake face 213 and restrained comprising first Position when new knife shown in position A of such as Fig. 9 as shown in the B of Fig. 9 of the rake face side surface 213b in face it is low with grind The corresponding amount of mill amount T-phase, but by carrying out with the point of a knife 211 to the cutting insert 201 after the grinding and grinding preceding identical protrusion side To positioning mode, utilize the screw threads for fastening of pinching screw 250, the fastening of the retainer fixed-use bolt 350 of pressing piece 401 Cutting insert 201 after the grinding is fixed on to the retaining part of retainer 301, from regardless of its grinding how, all with point of a knife 211 The mode that position returns to original position is fixed.The positioning operation of previous such point of a knife 211, Zhi Houneng are not needed as a result, It is enough directly to start again at processing.

That is, the cutting insert 201 after grinding makes the second restrained face from the state before grinding along clamping in the fixation The second of position constrains wall surface 325 and is slided to arrow H direction with guiding by the second constraint wall surface 325, until first restrained Until face is abutted with the first constraint wall surface, distance corresponding with amount of grinding, therefore 211 position of point of a knife are only moved in parallel like this It does not change.It does not need to carry out its position in positioning for fixing when grinding again every time as previous as a result, Operation is adjusted, therefore so that point of a knife 211 is returned to correct position of tool tip, thus, it is possible to efficiently carry out spiral shell Line revolution processing.In addition, in the present example, the rake face side surface 213b in rake face 213 and base portion 230, which is in one, to be put down Face, it is apparent that being also possible to that a part of rake face side surface 213b is for example made locally to be recessed.

In the present example, as noted previously, as cutting insert 201 to be embodied as to the plate of isosceles trapezoid, therefore, by energy Two cutting edges 210 side such as can be regenerated once again in grinding process there are two on the basis of cutting edge 210 by enough tools Formula can be realized the reduction along with the cost for grinding generated cutting insert 201.Also, in grinding, due to rake face The opposite bottom surface in (trapezoidal bottom) 213 (trapezoidal upper bottom) 240 is formed as parallel with rake face 213, therefore passes through the bottom Face is as datum level, additionally it is possible to obtain the effect for being easy to carry out plane lapping.

In addition, the hole being threadably secured for pinching screw 250 is formed as in the cutting insert 201 of this example The long hole extended on the straight line that the center and bottom of the bottom of isosceles trapezoid are vertically drawn, and it is formed adjacent to bottom side The width long hole wider than the width close to lower bottom side.Therefore, by forming the head outer diameter of pinching screw 250 larger, i.e., Make also can efficiently press cutting insert in the case where amount of grinding T becomes larger.

In addition, in the above example, the minor flank 215 of cutting insert 201 and the minor flank side surface in base portion 230 215b is formed as in a plane, as long as but meet following situations in the present invention, it may be assumed that knife face and base portion before the milling In rake face side surface after cutting insert in, make the second restrained face (minor flank side surface) from the state edge before grinding The second constraint wall surface of retaining part and slided by the second constraint wall surface guidance, until the first restrained face (preceding knife Surface side surface) abutted with the first of retaining part the constraint wall surface until, move in parallel like this it is corresponding with amount of grinding away from It does not change from rear position of tool tip.Thus, for example, can also be as cutting insert 501 shown in Fig. 10, minor flank 215 and base portion 230 in minor flank side surface 215b be not formed as in a plane.That is, as shown in the A of Figure 10, base portion Minor flank side surface 215b on 230 and minor flank 215 are not formed as in a plane, but if with front clearance shape At the mode of equal angular when indicating nose angle α and in the straight line parallel that minor flank 215 is drawn, then as shown in the B of Figure 10, i.e., Make after grinding again, the position of point of a knife 211 will not change.

In the above example, the case where illustrating the cutting insert using trapezoidal thread processing, but cutting insert is cut It cuts tooth shape shape and is correspondingly set as proper shape with the thread shape that should be processed, regardless of thread shape, making In the case where the cutting insert for processing a plurality of screw thread for one-pass, be formed as the point of a knife shape needed.In addition, this hair The object of " thread-whirling processing " in bright is not limited to as the external thread component of the assemblings such as bolt, tapping screw, to matching Representative screw member as conjunction component chasing and the screw member being screwed into, also comprising the snail to the side for constituting worm gear Screw thread as bar (worm shaft) constructs the processing etc. of component, comprising having in outer peripheral surface with the regulation of defined spiral prominence Tooth (thread) shaft component processing.

In addition, for retainer, it can be by the first restrained face by the first constraint wall surface pressing, the second constraint wall The positioning of the projected direction of point of a knife of the cutting insert to its retaining part when fixed is realized by the second restrained face pressing i.e. in face Can, therefore, proper shape, structure can be embodied as.Also, in the above example, due to being installed on cutter by adjusting The position of the retainer of main body can widely cope with the axis structure of processing object come the position of tool tip of cutting insert when determining new knife The variation of the outer diameter, thread height of part.However, in the present invention, in order to by the way that new cutting insert is fixed on cutter body Retaining part carry out the positioning of its point of a knife, and such as special product is used at least one of cutter body and cutting insert In the case where, then do not need retainer as above-mentioned example.That is, the retaining part on cutter body can not be said to be retainer , if but be configured to position and fix into cutting insert its point of a knife is made to be in desired position, it does not need additional Retainer can embody.The present invention is not limited to above-mentioned concrete examples as described above, within the scope of its spirit, can It suitably changes and embodies.

In addition, cutting insert is embodied as constituting the structure of the cutting element of thread-whirling processing in above-mentioned each example Part, but as described above, cutting insert of the invention be not limited to constitute thread-whirling processing cutting element, be also applied for constituting The cutting element (lathe tool) used in the common screw thread process using lathe is cut used in processing in addition to this Tool.

Claims (8)

1. a kind of cutting element of thread-whirling processing, it includes: be formed as cricoid cutter body；And cutting insert, Its retaining part for being fixed on the cutter body, or be fixed on and be installed on cutter master in such a way that installation site can adjust Retaining part on the retainer of body, by the cutting insert with the point of a knife of its cutting edge the lateral quilt in the ring-type of the cutter body The mode of the prominent specified amount of the incision direction of cutting material positions,

The cutting element of the thread-whirling processing is characterized in that,

The cutting insert includes the cutting edge and the base portion fixed to the retaining part, constitutes the preceding knife of the cutting edge Angle, that is, nose angle between face and minor flank is formed as acute angle, and the rake face side surface in the rake face and the base portion is with close The mode for being similar to an imaginary plane is formed, and has the defined amount of grinding for grinding again, also,

For the minor flank side surface in the base portion, when indicating the nose angle, along the minor flank side surface Angle between the straight line of extraction and the rake face is formed as identical as the angle of the nose angle,

The retaining part includes: the first constraint wall surface, and the rake face side surface is carried out as the first restrained face Constraint；And second constraint wall surface, the minor flank side surface is constrained as the second restrained face,

By pressing the first restrained face to the first constraint wall surface respectively, Xiang Suoshu second is constrained described in wall surface pressing Second restrained face, come point of a knife when realizing fixation of the cutting insert to the retaining part, described on projected direction Positioning.

2. the cutting element of thread-whirling processing according to claim 1, which is characterized in that

The rake face of the cutting insert and the rake face side surface in the base portion are formed as in a plane.

3. the cutting element of thread-whirling processing according to claim 1, which is characterized in that

The minor flank of the cutting insert and the minor flank side surface in the base portion are formed as in a plane.

4. the cutting element of thread-whirling processing described in any one of claim 1 to 3, which is characterized in that

The cutting insert has two identical cutting edges with such as flowering structure, that is, the cutting insert is formed as isosceles trapezoid Plate, using the isosceles trapezoid bottom each waist between interior angle as nose angle, the knife before the both ends of the bottom are respectively provided with Face.

5. a kind of cutting insert comprising cutting edge and the base portion fixed to retaining part, the cutting insert be characterized in that,

It constitutes the angle between the rake face of the cutting edge and minor flank i.e. nose angle and is formed as acute angle, the rake face and the base Rake face side surface in portion formed in a manner of being similar to an imaginary plane, and is had for grinding as defined in grinding again Mill amount, also,

For the minor flank side surface in the base portion, when indicating the nose angle, along the minor flank side surface Angle between the straight line of extraction and the rake face is formed as identical as the angle of the nose angle,

The rake face side surface and the minor flank side surface are formed as the restrained face to the retaining part when fixed.

6. cutting insert according to claim 5, which is characterized in that

The rake face of the cutting insert and the rake face side surface in the base portion are formed as in a plane.

7. cutting insert according to claim 5, which is characterized in that

The minor flank of the cutting insert and the minor flank side surface in the base portion are formed as in a plane.

8. the cutting insert according to any one of claim 5~7, which is characterized in that

The cutting insert has two identical cutting edges with such as flowering structure, that is, the cutting insert is formed as isosceles trapezoid Plate, using the isosceles trapezoid bottom each waist between interior angle as nose angle, the knife before the both ends of the bottom are respectively provided with Face.