JP2006218549A - Rotary cutting tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary cutting tool capable of efficiently supplying cutting fluid to a knife edge of a cutting blade. <P>SOLUTION: It is possible to efficiently supply the cutting fluid to the knife edges of all the cutting blades 11 as this rotary cutting tool has a single first channel 50 to introduce the cutting fluid to the inside of a tool main body 2, a single second channel 51 to open toward each of more than two of the cutting blades 11 and more than two of connecting channels 61A to 61D smoothly communicating end parts of the first channel 50 and the second channel 51 through to each other and making a curved line. It is possible to extremely facilitate and reduce cost of molding of the connecting channels 61A to 61D by forming the connecting channels 61A to 61D on a connecting member 60 installed on the tool main body 2 free to connect to and disconnect from it. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a turning tool provided with a flow path for supplying a cutting fluid to a cutting edge of a cutting edge inside a tool body.

In recent years, in cutting work, from the viewpoint of environmental friendliness, mist processing that sprays a mist in which a small amount of cutting fluid is atomized onto the cutting point and a very small amount of cutting fluid (MQL) that mixes a very small amount of highly lubricated cutting fluid and compressed air. : Minimum Quantity Lubricating) so-called semi-dry processing is increasing.

In semi-dry processing, the cutting fluid mixed with a small amount of cutting fluid and compressed air is sprayed to the cutting point as an external lubrication method in which the nozzle provided outside is sprayed to the cutting point and the tool body of the cutting tool. There is an internal oil supply system that injects into a cutting point from an opening of a flow path (oil hole) formed inside. A cutting tool employing the latter is illustrated in FIG. In the rotary cutting tool (1) of FIG. 8, the tool body (2) communicates with an external cutting oil supply section (15), and a first oil passage (introducing cutting oil into the tool body (2)) ( 17). The locator (4) communicates with the first oil passage (17) and also communicates with the hole (3e) of the throw-away tip (3) with the hole so that the cutting fluid is fed along the chip rake face (3a). Thus, an oil introduction hole (19) and a scooping surface side oil groove (24) for guiding to the tip edge side (C) are formed. The wedge (5) communicates with the hole (3e) of the throw-away tip (3) with a hole, and guides the cutting oil along the tip back surface (3b) to the tip clearance surface (3f) side (see FIG. 26). As a result, the cutting fluid can be sprayed from the vicinity of the tip edge on the chip scooping surface (3a) side, and the cutting fluid can be sprayed to the tip clearance surface (3f) side (see, for example, Patent Document 1).
JP 10-175114 A

In semi-dry machining, cutting fluid or high-lubricating cutting fluid is applied to the cutting edge of the cutting edge pinpoint to suppress the heat generation of the cutting edge and improve the life of the cutting edge. The issue was whether to inject. However, in the rotary cutting tool (1) of FIG. 8, a bent portion that is refracted substantially at right angles in the middle of the first oil passage (17), and the first oil passage (17) and the oil introduction hole (19) Are intersecting at almost right angles, and there are obstacles to the turbulent flow and flow of the cutting fluid at the bent and intersecting portions, so that the cutting fluid is condensed and liquefied in the process of circulating inside the tool body (2). Therefore, the effect of efficiently supplying the cutting fluid or the highly lubricated cutting fluid to the cutting edge may not be obtained.

This invention is made | formed in view of the said subject, The objective is to provide the turning tool which can supply the cutting fluid to a cutting blade efficiently.

In order to solve the above-described problems, the rolling tool of the present invention is a rolling tool in which two or more cutting edges are provided along the circumferential direction on the outer periphery of the tip of a tool body that rotates about a central axis (CL). A flow path for injecting a cutting fluid supplied from the outside toward the cutting edge is formed in the tool body, and the flow path includes at least the cutting fluid in the tool body. A single first flow path to be introduced into the first flow path, two or more second flow paths branched from the first flow path and opened toward the respective cutting edges, and the first flow path and the second flow path A rolling tool characterized in that it comprises two or more connecting flow paths that smoothly communicate with each other and form a smooth curved line. The cutting fluid supplied to the flow path is any one of a cutting fluid, compressed air, mist, or a very small amount of cutting fluid (MQL) obtained by mixing a very small amount of highly lubricated cutting fluid and compressed air.

In the above rolling tool, at least a part of the connection channel is formed by a connection member that is detachably attached to the tool body, and the connection channel is formed by attaching the connection member to the tool body. Preferably it is formed. Further, the connection flow path is formed rotationally symmetrically about the central axis (CLr) of the connection member, and the connection member is centered on the central axis (CLa) of the connection flow path centered on the central axis (CLr). It is preferable that the curved joint surface formed by the rotation trajectory of (CLd) is composed of a first member and a second member that are in close contact with each other.

According to the above rolling tool, since the single first flow path and the two or more second flow paths are smoothly communicated by the plurality of curved connection paths, the flow path inside the tool body is Because there is no obstacle to the turbulent flow and flow of the flowing cutting fluid, cutting fluid, compressed air, mist, or a very small amount of cutting fluid (MQL) mixed with a very small amount of highly lubricated cutting fluid and compressed air Can be efficiently supplied to the cutting edge. In particular, since the high-lubricating cutting fluid is not condensed and liquefied in the process in which a very small amount of cutting agent (MQL) flows through the inside of the tool body, the high-lubricating cutting fluid can be efficiently supplied to the cutting edge of the cutting edge. In the first flow path and the second flow path, it is preferable that each flow path is formed in a straight line so as not to cause an obstacle to the turbulent flow and flow of the cutting fluid.

The connection channel may be formed by a connection member that is at least partially detachably attached to the tool body, and the connection channel may be formed by attaching the connection member to the tool body. Further, the connection flow path is formed rotationally symmetrically about the central axis (CLr) of the connection member, and the connection member is centered on the central axis (CLa) of the connection flow path centered on the central axis (CLr). ˜CLd), if the curved joint surface composed of the first member and the second member are brought into close contact with each other, the connection flow path is defined as the first flow path and the second flow. It is very easy and low-cost to smoothly connect to the end of the road and form a smooth curve.

Next, a first embodiment in which the present invention is applied to a side cutter will be described with reference to the drawings. FIG. 1 is a front view of a side cutter. 2 is a partial cross-sectional side view of the main part of the side cutter shown in FIG. 3 to 8 are views for explaining the connecting member, FIG. 3 is a view of the connecting member used in the side cutter shown in FIG. 1, (a) is a front view, and (b) is a partially sectional side view. It is. 4A and 4B are views of the first member of the connecting member shown in FIG. 3, in which FIG. 4A is a front view, and FIG. FIGS. 5A and 5B are views of the second member of the connecting member shown in FIG. 3, wherein FIG. 5A is a front view and FIG. 6 is an exploded perspective view of the connecting member shown in FIG.

As illustrated in FIG. 1, the side cutter (1) is provided with four tip attachments provided at substantially equal intervals in the circumferential direction on the outer periphery of the tip of the tool body (2) that rotates about the central axis (O). A throw-away tip (10) is mounted in the groove (3). The chip mounting groove (3) is notched in the wall surface facing the front side in the rotational direction (K) of the chip pocket (4) provided in the outer periphery of the tip of the tool body (2). The bottom surface (3a) of the chip mounting groove (3) is provided with a female screw hole (6) into which the chip fixing screw (20) is screwed. The throw-away tip (10) is formed by molding a hard material such as cemented carbide into an isosceles trapezoidal flat plate shape, and mounting holes (10a) are formed through the upper and lower surfaces. The throw-away tip (10) has a top surface of an isosceles trapezoidal shape that becomes a rake face (10b) facing forward in the rotational direction (K), and an opposite lower face (10c) on the bottom face (3a) of the tip mounting groove (3). The tip fixing screw (20) that is in contact with and inserted into the mounting hole (10a) is fixed by screwing into the female screw hole (6) provided in the bottom surface (3a) of the chip mounting groove (3). The cutting edges (11) formed on the side ridges of the rake face (10b) are the outer peripheral edges (11a) facing the radially outward side of the side cutter (1) and the sides on the both sides of the side cutter (1). It is comprised from the corner (11c) pinched | interposed into the blade (11b) and the outer periphery blade (11a), and the side blade (11b). The flank surfaces (12a, 12b, 12c) connected to the outer peripheral blade (11a), the side blade (11b), and the corner (11c) intersect with the rake face (10b) at an acute angle and have a positive clearance angle.

The side surface (12d) on the inner peripheral side of the throw-away tip (10) is supported by the side surface (30b) of the wedge member (30). A wedge member (30) is mounted by a screw member (40) in a wedge member insertion groove (5) formed continuously to the inner peripheral side of the chip mounting groove (3). The circumferential side surface (30a) abuts on the inner circumferential wall surface (5b) of the wedge member insertion groove (5) and can be moved along the wall surface (5b) by operating the screw member (40). Has been. Here, the central axis of the wall surface (5b) and the screw member (40) is such that when the wedge member (30) is moved to the bottom surface (5a) side of the wedge member insertion groove (5), the wedge member (30) The throwaway tip (10) is inclined at a predetermined angle with respect to the inner peripheral side surface (12d) of the throwaway tip (10) so as to press the throwaway tip (10) toward the outer peripheral side.

As illustrated in FIG. 1 and FIG. 2, the central portion of the tool body (2) has a single first section having a substantially circular cross section that extends linearly along the central axis (CL) of the tool body (2). One flow path (50) is formed. An end (not shown) on the introduction side of the first flow path (50) is located at the center of the tool body (2) when a cutting fluid is supplied via, for example, a spindle of a machine tool or a holding holder. Open at the end. The cutting fluid introduced from the end portion on the introduction side of the first flow path (50) is directed to the downstream end portion (50b) located at the center portion on the tip end side of the tool body (2).

On the other hand, on the tip side of the tool body (2), it extends radially and linearly from the vicinity of the central axis (CL) toward the four throw-away tips (10) positioned radially outward of the tool body (2). Four second flow paths (51) having a substantially circular cross section are provided. The downstream end (51b) of each second flow path (51) opens to the wall surface (4a) of the pocket (4), and this opening is on the cutting edge (11) side of the throw-away tip (10). Is directed. The downstream end portion (50b) of the first flow path (50) and the upstream end section (51a) of the second flow path (51) are formed in a curved shape and have a substantially circular cross section. The cutting fluid introduced from the first flow path (50) is communicated by the connection flow paths (61A to 61D) to the second flow paths (51) through the connection flow paths (61A to 61D). It is supplied and ejected from the opening (51b) of the wall surface (4a) of the pocket (4) toward the cutting edge (11) of the throw-away tip (10). As the cutting fluid, cutting fluid for the purpose of lubricating or cooling the cutting edge (11), compressed air, mist, or a very small amount of cutting fluid (MQL) in which a very small amount of high-lubricating cutting fluid and compressed air are mixed. Can be mentioned.

The connecting flow paths (61A to 61D) smoothly branch into four from the downstream end (50b) of the single first flow path (50), each upstream of the second flow path (51). It extends radially toward the end (51a) and in a curved shape in a side view, and is smoothly connected to the end (51a). In this embodiment, as illustrated in FIGS. 1 and 2, the connection channel (61 </ b> A to 61 </ b> D) formed in the connection member (60) that is detachably attached to the center of the tip of the tool body (2). The first channel (50) and the second channel (51) are in communication. That is, a concave portion (6) having a substantially cylindrical shape is formed in the central portion of the tip surface (2b) of the tool body (2), and the first flow path (50) is formed in the central portion of the bottom surface of the concave portion (6). The downstream end (50b) is opened, and the upstream end (51a) of each second flow path (51) is provided at substantially equal intervals along the circumferential direction on the inner wall surface of the recess (6). Open. Connection channels (61A to 61D) are formed in a substantially columnar connection member (60) that is detachably mounted in the recess (6). As illustrated in FIG. 61A to 61D) correspond to the downstream end (50b) of the first flow path (50) and the upstream end (51a) of the second flow path (51) opened in the recess (6). In addition, an upstream end (62a) is opened at the center of the end surface (60c) of the connecting member (60), and downstream at substantially equal intervals along the outer peripheral surface (60a) of the connecting member (60). The side end (62b) opens. Each connection channel (61A-61B) branches into four from the upstream end (62a), and is viewed from the center axis (CLr) of the connection member (60) toward the downstream end (62b). Then, it extends radially and in a curved shape in a side view. When the connecting member (60) is mounted in the recess (6) of the tool body (2), the upstream end (62a) and the downstream end (62b) of the connecting channel (61A to 61D) are provided. By connecting to the downstream end (50b) of the first flow path (50) and the upstream end (51a) of the second flow path (51) respectively opening in the recess (6), the first flow The path (50) communicates with the second flow path (51).

As illustrated in FIGS. 3 to 5, in the present embodiment, the connection flow paths (61 </ b> A to 61 </ b> D) are along a central axis (CLa to CLd) forming an arc shape with a constant curvature radius (R) in a side view. Are formed in a circular cross section and are rotationally symmetrical about the central axis (CLr) of the connecting member (60). Further, at the upstream end (62a) of the connection channel (61A to 61D), the central axis (CLa to CLd) of each connection channel (61A to 61D) and the downstream of the first channel (50). The angle (α) formed with the central axis (CLu) of the end portion (50b) on the side is set in the range of 0 ° to 30 ° and is smoothly connected without being bent suddenly. Similarly, at the downstream end portion (62b) of the connection channel (61A to 61D), the central axis (CLa to CLd) of each connection channel (61A to 61D) and the upstream of the second channel (51). The angle formed with the central axis of the end (51a) on the side is set in a range of 0 ° to 30 ° and is smoothly connected without being bent suddenly. The shape of the central axis (CLa to CLd) of the connection channel (61A to 61D) in the side view is not limited to the circular arc shape having a constant curvature radius (R), and two or more circular arcs having different curvature radii are combined. It may be a shape or a combination of one or more arcs and one or more straight lines. At this time, the angle formed by the tangents in the connecting portion between the arcs or in the connecting portion between the arc and the straight line is preferably set to 30 ° or less, more preferably 20 ° or less, and particularly preferably 10 ° or less. It is preferable to be connected to. Moreover, it is preferable that a connection flow path (61A-61D) and a 2nd flow path (51) are set to substantially the same internal diameter over the whole length, and a 1st flow path (50) and a 2nd flow path (51) are It is preferable to form it linearly.

As illustrated in FIG. 4 and FIG. 5, the connecting member (60) is configured by a rotation locus of the central axis (CLa to CLd) of the connecting flow path (61A to 61D) with the central axis (CLr) as the center. A curved joint surface (64a, 65a) is composed of a first member (64) and a second member (65) which are brought into close contact with each other. That is, the first member (64) illustrated in FIG. 4 is based on the rotation trajectory of the central axes (CLa to CLd) of the connection flow paths (61A to 61D) around the central axis (CLr) of the connection member (60). A formed concave curved joint surface (64a) having an inverted Mt. Fuji shape is formed, and a connecting flow path (61A) passing through the joint surface (64a), the central bottom portion, and the opposite end surface (60c) central portion. ~ 61D) upstream end (62a) is formed, and the groove having a semicircular cross section obtained by dividing the cross section of the connection channel (61A ~ 61D) into approximately two equal parts along the surface of the joint surface (64a) (64A to 64D) are extended from the upstream end portion (62a) to the respective downstream end portions (62b) that are opened at four locations on the outer peripheral surface (60a). As illustrated in FIG. 5, one second member (65) has a central axis (CLa to CLd) of the connection channel (61 </ b> A to 61 </ b> D) centered on the central axis (CLr) of the connection member (60). A convex curved joint surface (65a) having a Mt. Fuji shape formed by the rotation trajectory is formed, and the cross section of the connection channel (61A to 61D) is substantially bisected along the surface of the joint surface (65a). Grooves (65A to 65D) having a semicircular cross section extend from the respective downstream end portions (62b) opening at four locations on the outer peripheral surface (60a) of the second member (65) to the highest peak of the central portion. Established.

An example of a manufacturing method of the first member (64) and the second member (65) constituting the connecting member (60) will be described below. Both members (64, 65) are made of a substantially columnar material. The first member (64) has an inverted Mt.-shaped concave curved joint surface (64a) and a second member (64a). 65), a convexly curved joint surface (64a, 65a) having a Mt. Fuji shape is formed by turning. And as illustrated in FIGS. 4 and 5, a semicircular groove having a semicircular cross section in which the cross section of the connection channel (61 </ b> A to 61 </ b> D) is substantially divided into two along the surface of each joint surface (64 a, 65 a). 64A to 64D, 65A to 65D) are formed by cutting using the tip ball blade of the ball end mill (70). In the first member (64) and the second member (65) manufactured in this way, the grooves (64A to 64D, 65A to 65D) having a semicircular cross section match each other and the joint surfaces (64a, 65a) A connecting member (60) is formed by connecting the members in close contact with each other.

As illustrated in FIG. 6, two counterbore holes (66A) penetrating the end surface (60b) and the joint surface (65a) of the second member (65) are provided, while the joint surface of the first member (64) is provided. (64a) is provided with a female screw hole (66B) corresponding to the counterbore (66A). By screwing the screw member (68) inserted through the counterbore (66A) into the female screw hole (66B), both the members (64, 65) are brought into close contact with each other (64a, 65a). Connected. If both the members (64, 65) are connected to each other through the adhesive member or the sealing material in addition to the connection by the screw member (68), the connection surfaces (64a) can be obtained. , 65a), and the leakage of cutting fluid to the outside and the decrease in pressure can be reliably prevented.

Further, in the connecting member (60) illustrated in FIG. 6, counterbore holes (67) penetrating both end faces (60b, 60c) are provided symmetrically at two positions with the central axis (CLr) as the center. On the bottom surface of the recess (6) of the tool body (2) that accommodates the connecting member (60), a screw member (69) such as a hexagon socket bolt inserted into the counterbore (67) is provided in the recess (6). It is fixed to the tool body (2) by being screwed into a female screw hole (not shown) provided on the bottom surface. Here, the circumferential positioning of the connecting member (60) with respect to the tool main body (2) is performed with the opening edge of the recess (6) in the tip surface (2b) of the tool main body (2) as illustrated in FIG. This is done by fixing the alignment marks (7) provided on the front end surface (60b) of the connecting member (60) in a state where they coincide with each other.

As can be seen from FIGS. 1 and 2, the side cutter (1) described above is attached to the spindle of the machine tool directly or via a holder or the like and is rotated about a central axis (CL) and the center. By applying feed in a direction orthogonal to the axis (CL), the workpiece is grooved or flattened. The cutting fluid supplied from an external supply unit, for example, via a spindle of a machine tool or the like passes from the end portion (not shown) of the first flow path (50) through the connection flow paths (61A to 61D). It ejects toward the cutting edge (11) from the opening of the end (51b) on the downstream side of the second flow path (51). Since the single first flow path (50) forming a straight line and the four second flow paths (51) are connected by four connection flow paths (61A to 61D) forming a curved line, the tool Since there is no obstacle to the turbulent flow and flow of the cutting fluid flowing through the flow path inside the main body (2), the pole is a mixture of cutting fluid, compressed air, mist, or a trace amount of highly lubricated cutting fluid and compressed air. A small amount of cutting agent (MQL) can be efficiently supplied to the cutting edge of the cutting edge (11). In particular, since the high-lubricating cutting fluid does not condense in the process in which a very small amount of cutting agent (MQL) flows through the inside of the tool body (2), the high-lubricating cutting fluid can be efficiently supplied to the cutting edge of the cutting edge (11). it can. In the first flow path (50) and the second flow path (51), each flow path (50, 51) is formed in a straight line so as not to obstruct the turbulent flow and flow of the cutting fluid. It is preferable.

When the curved connection channel (61A to 61D) is formed in the tool body (2) by a molding method such as casting or injection molding, the connection channel (61A to 61D) and the tool body (2) Since a mold is required, there is a problem in terms of manufacturing cost. However, according to the present embodiment, the connection flow paths (61A to 61D) include the first member (64) and the second member constituting the connection member (60). Since the semicircular grooves (64A to 64D, 65A to 65D) formed by cutting are formed in combination with each other on the respective joint surfaces (64a and 65a) of the member (65), the manufacturing cost is reduced. In addition to a significant reduction, the degree of freedom of the cross-sectional shape and vertical cross-sectional shape of the connecting flow path (61A to 61D) and the first flow path and the second flow path is high, and it is relatively easy and easy to change these shapes. .

Next, another embodiment will be described with reference to FIG. FIG. 7 is a side view of the side cutter according to the second embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In the first embodiment, the grooves (64A to 64D) having a semicircular cross section constituting the connection flow paths (61A to 61D) formed in the connection member (60) are formed as tools in the second embodiment. It is formed directly on the main body (2). In other words, the joining surface (64a) formed in the first member (64) of the connecting member (60) and the semicircular cross-sectional grooves (64A to 64D) in the first embodiment are provided in the tool body (2). Directly formed. Specifically, as illustrated in FIG. 7, the recess (6) formed in the center of the tip of the tool body (2) has a downstream side of the first flow path (50) opened in the center of the bottom surface. Between the end portion (50b) and the end portion (51a) on the upstream side of the second flow channel (51) opened at four locations on the inner wall surface (6a), the central axis of the connecting flow channel (61A to 61D) A concave curved joint surface (64a) having an inverted Mt. Fuji shape along (CLa to CLd) is formed, and the cross-section of the connection channel (61A to 61D) is approximately 2 etc. along the surface of the joint surface (64a). Divided semicircular grooves (64A to 64D) extend from the downstream end (50b) of the first flow path (50) to the upstream end (51a) of the second flow path (51). Is done. In the second member (65) used in the first embodiment, the joint surface (65a) faces the joint surface (64a) of the recess (6) of the tool body (2) and the inside of the recess (6). Is housed in. In order to fix the second member (65) in the recess (6) of the tool body (2), the screw member (68) may be used as in the first embodiment. At this time, as for the recessed part (6) and the 2nd member (65), mutual mutual joining surfaces (64a, 65a) closely_contact | adhered, and the mutually cross-sectional semicircle-shaped groove | channel (64A-64D, 65A-65D) corresponded. The connection channels (61A to 61D) having a circular cross section that are fixed in a state and communicate with the first channel (50) and the second channel (51) are formed.

According to the above-described embodiment, a single first flow path (50) having a linear shape and four second flow paths (51) are connected to four connection flow paths (61A to 61A to be curved). 61D), since there is no obstacle to the turbulent flow and flow of the cutting fluid flowing through the flow path inside the tool body (2), cutting fluid, compressed air, mist, or a very small amount of highly lubricated cutting A very small amount of cutting agent (MQL), which is a mixture of oil and compressed air, can be efficiently supplied from the opening at the downstream end (51b) of the second flow path (51) to the cutting edge of the cutting edge (11). it can. In particular, since the high-lubricating cutting fluid does not condense in the process in which a very small amount of cutting agent (MQL) flows through the inside of the tool body (2), the high-lubricating cutting fluid can be efficiently supplied to the cutting edge of the cutting edge (11). it can. In the first flow path (50) and the second flow path (51), each flow path (50, 51) is formed in a straight line so as not to obstruct the turbulent flow and flow of the cutting fluid. It is preferable.

When the curved connection channel (61A to 61D) is formed in the tool body (2) by a molding method such as casting or injection molding, the connection channel (61A to 61D) and the tool body (2) Although a mold is required, there is a problem in terms of manufacturing cost, but according to the present embodiment, the connection flow paths (61A to 61D) are provided with the recess (6) and the second member (65) of the tool body (2). Since the grooves (64A to 64D and 65A to 65D) having a semicircular cross section formed by cutting are formed on the respective joint surfaces (64a and 65a) of each other in combination, the manufacturing cost is greatly reduced. In addition, the degree of freedom of the cross-sectional shape and the vertical cross-sectional shape of the connection flow channel (61A to 61D) and the first flow channel and the second flow channel is high.

The present invention is not limited to the side cutter described above, and is a rolling tool that has a flow path inside the tool body (2) and supplies cutting fluid to the plurality of cutting edges (11). Applicable. Further, it goes without saying that various modifications and additions not described in the above embodiments can be made without departing from the gist of the present invention.

It is a front view of the side cutter which is 1st Embodiment. It is a partial cross section side view of the principal part of the side cutter shown in FIG. It is a figure of the connection member used for the side cutter shown in FIG. 1, (a) is a front view, (b) is a partial cross section side view. It is a figure of the 1st member of the connection member shown in FIG. 3, (a) is a front view, (b) is an AA sectional view. It is a figure of the 2nd member of the connection member shown in FIG. 3, (a) is a front view, (b) is a BB sectional drawing. It is a disassembled perspective view of the connection member shown in FIG. It is a partial cross section side view of the principal part of the side cutter which is 2nd Embodiment. It is a side view of the conventional rotary tool with an oil hole.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Side cutter 2 Tool main body 3 Tip attachment groove 5 Wedge member insertion groove 6 Recess 7 Alignment mark 10 Throw away tip 11 Cutting edge 30 Wedge member 50 First flow path 51 Second flow path 50b On the downstream side of the first flow path End 51a Upstream end 51b Second flow path downstream end 60 Second flow path downstream end 60 Connecting members 61A to 61D Connection flow path 62a Upstream side end 62b Downstream of the connection flow path End portion 64 First member 65 Second member 64a, 65a Joint surfaces 64A to 64D, 65A to 65D Semi-circular grooves CL Central axis CLr of side cutter Central axis CLa to CLd of connecting member Central axis of connecting channel

Claims (5)

In a rolling tool in which two or more cutting edges are provided along the circumferential direction on the outer periphery of the tip of a tool body that rotates about a central axis (CL),
A flow path for injecting a cutting fluid supplied from the outside toward the cutting edge is formed inside the tool body, and the flow path includes at least the cutting fluid in the tool body. A single first flow channel to be introduced, two or more second flow channels that branch from the first flow channel and open toward the respective cutting edges, and ends of the first flow channel and the second flow channel A rolling tool characterized in that it comprises two or more connecting flow paths that smoothly communicate with each other and have a smooth curved shape. The cutting fluid supplied to the flow path is any one of a cutting fluid, compressed air, mist, or a very small amount of cutting fluid (MQL) obtained by mixing a very small amount of high-lubricating cutting fluid and compressed air. The turning tool according to claim 1, wherein The rolling tool according to claim 1 or 2, wherein at least a part of the connection flow path is formed by a connection member that is detachably attached to the tool body. The rolling tool according to claim 3, wherein the connecting flow path is formed by mounting the connecting member on the tool body. The connection flow path is formed rotationally symmetrically about the central axis (CLr) of the connection member, and the connection member is centered on the central flow line (CLr). 5. The rolling tool according to claim 3, comprising a first joining member and a second member that are in close contact with each other and having a curved joining surface constituted by a rotation locus.

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