JP2008155352A - Cutting edge replaceable cutter with adjusting mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting edge replaceable cutter with an adjustable mechanism capable of allowing finer adjustments, compared with conventional products, of a cutting edge position of a cutter having a simply-structured and easily-adjustable cutting edge adjusting mechanism. <P>SOLUTION: The cutting edge adjusting mechanism 5 is composed of: an adjusting member 9 having a clearance 8 between a cutter body 2 and the adjusting member 9; a connecting member 10 fixing the adjusting member 9 to the cutter body 2; and an adjusting screw 11 applying force to an input part 9a of the adjusting member 9. The thrust force of the adjusting screw 11 moves the input part 9a in the axial direction of the adjusting screw 11 to apply elastic deformation to the adjusting member 9 around the connecting member 10 so that a cutting edge replaceable tip 6 can be positioned on the displaced end face of the adjusting member 9. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention has a blade-tip-exchange-type cutter in which the cutting edge is configured with a blade-tip-exchangeable tip (throw away tip), and more specifically, has a blade-tip adjustment mechanism (adjustment mechanism for the tip attachment position with respect to the cutter body). The present invention also relates to a blade-exchangeable cutter with an adjustment mechanism having a simple structure and capable of fine adjustment.

  Cutting tools that make up the cutting edge with a replaceable cutting edge tip (hereinafter simply referred to as a tip) of a sintered product often use a tip that leaves black skin (sintered skin) on the surface in order to keep processing costs low. Tend to. Since the chip leaving the black skin has low dimensional accuracy, it is necessary to finely adjust the position of the cutting edge of the chip mounted on the cutter body after mounting when high accuracy of cutting is required. Fine adjustment of the blade edge position is achieved by inserting a wedge-shaped member or adjusting screw between the cutter body and the tip or between the cutter body and the cartridge holding the tip, and the amount of insertion and tightening of that member. In many cases, the chip positioning surface is displaced by changing the angle, but this structure inevitably suffers from problems such as an increase in the number of parts, complicated processing of structural elements, and complicated adjustment work.

  Therefore, in Patent Document 1 below, a cartridge in which a chip seat is formed is fixed to a cutter body, a slit is provided in the cartridge, and the slit is used as a seat surface that supports one side of the chip of the chip seat and a positioning reference surface of the cutter body. An adjustment mechanism has been proposed in which a wedge-shaped member is inserted into the slit disposed in parallel with the end face between the end face and the end face.

  The adjusting mechanism includes a chip seat provided in the cartridge including two seat surfaces inclined in opposite directions at an angle of 45 ° with respect to the cutter axis, and further, one seat surface and the seat surface are parallel to each other. The slit is provided between the end surface and the two seating surfaces support two perpendicular sides of the chip. When a wedge-shaped member is inserted into the slit provided in the cartridge, the slit and one seating surface are provided. A part of the cartridge defined between (one of the two seating surfaces) is elastically deformed, and accordingly, one of the seating surfaces is displaced in a direction perpendicular to the insertion direction of the wedge-shaped member. The positioning point is changed.

Similar techniques are also disclosed in Patent Documents 2 to 4 below.
JP-A-8-39330 Japanese Utility Model Publication No. 7-27719 JP 2006-102924 A JP 2006-247776 A

  In the adjustment mechanism disclosed in Patent Document 1, the tip is displaced not only in the cutter axis direction but also in the cutter radial direction when the wedge-shaped member is fitted into the slit. Therefore, it is difficult to apply to corner milling cutters that dislike changes in outer diameter.

  In addition, when the cartridge is attached to the cutter body so that the end surface of the cartridge is oriented at a right angle to the tool axis, the tip moves only in the cutter axis direction when the wedge-shaped member is inserted. Since the structure is such that the amount by which the cartridge is elastically deformed and pushed and the amount of displacement of the seating surface for positioning the chip is equal, it is difficult to meet the demand for finer adjustment. Those disclosed in Patent Documents 2 to 4 have the same problem.

  Therefore, the present invention takes advantage of the features of the adjustment mechanism disclosed in Patent Document 1 and the like, that is, the advantage that the structure is simple and the adjustment work is easy, and the cutting edge than that disclosed in Patent Document 1 is used. It is an object to enable finer adjustment of the position.

In order to solve the above-described problems, in the present invention, the following cutting edge is attached to a cutting edge replaceable cutter in which a tip seat is provided on a cutter body or a locator attached to the cutter body, and a cutting edge replaceable tip is detachably attached to the tip seat. An adjustment mechanism was provided.
The blade edge adjustment mechanism includes an adjustment member that creates a gap with the cutter body or the locator, a connecting member that fixes the longitudinal halfway of the adjustment member to the cutter body or the locator, and the adjustment member that is separated from the connection member. And an adjustment screw that applies force to the input portion at the position, and one of the seating surfaces of the tip seat is constituted by one end surface of the adjustment member, and the input portion is adjusted by the thrust of the adjustment screw. The adjustment member is elastically deformed with the connecting member as a fulcrum, and the tip (blade edge) is positioned by bringing the blade tip replaceable tip into contact with one end surface of the adjustment member that is displaced along with the elastic deformation. To do.

  The adjusting member and the connecting member of the blade edge adjusting mechanism may be formed integrally with the cutter body or the locator, or may be configured by fixing another part to the cutter body or the locator. The former is preferable from the viewpoint of durability, but the latter has an advantage that accuracy in production is not required as much as the former because an adjusting member and a connecting member can be retrofitted to the cutter body.

  Further, the adjustment member is configured to elastically deform the input portion by pushing and moving the input portion with an adjustment screw in a direction in which the gap between the cutter body or the locator is increased, and the clearance between the input portion and the cutter body or the locator. There are two forms of elastic deformation by pulling in the direction of shrinking, and the object of the invention can be achieved regardless of which form of adjustment member is employed.

  The blade edge adjusting mechanism provided in the cutter according to the present invention applies a force from the adjusting screw to the input portion to displace the input portion in the axial direction of the adjusting screw. By the operation, the adjustment member is elastically deformed, and one end of the adjustment member is displaced in a direction perpendicular to the axis of the adjustment screw while rotating about the connecting member with the cutter body or the locator. The amount of displacement at this time is significantly greater than the amount of displacement of the input unit in the axial direction of the adjusting screw by adopting a structure in which the adjusting member is elastically deformed so as to rotate about the connecting member with the cutter body or locator. Therefore, finer adjustment than that of the cutter of Patent Document 1 can be performed.

  Embodiments of the present invention will be described below with reference to FIGS. 1 to 6 show a cutter (corner milling cutter) 1A according to a first embodiment to which the present invention is applied. In the figure, reference numeral 2 denotes a cutter body, which has a chip seat 3 having three seating surfaces 3a, 3b and 3c and a plurality of chip pockets 4 corresponding to the chip seats on the outer periphery of the tip. In addition, each of the tip seats 3 has a blade edge adjusting mechanism 5 at the installation portion.

  Reference numeral 6 denotes a blade-tip replaceable tip (throw away tip) that is detachably attached to each tip seat 3. In the illustrated cutter, the tip 6 is fixed to the cutter body 2 by passing the clamp screw 7 through the mounting hole 6a at the tip center and tightening the tip 6 with the clamp screw 7 screwed into the cutter body 2. Between the clamp screw 7 and the mounting hole 6a at the center of the chip, there is a flexibility that allows variation due to adjustment of the chip fixing position within a required range (the structure is the same for other types of cutters described later).

  The chip 6 is formed such that both the rake face and the front flank face are rectangular, and the outer flank face is a parallelogram. However, the shape is not limited to this.

  In the chip seat 3, a seat surface 3a for positioning the chip 6 in the cutter radial direction and a seat surface 3c for positioning the chip 6 in the cutter axial direction form a right angle in the cross section of FIG. Further, the seat surface 3 c is constituted by one end surface of the adjustment member 9 of the blade edge adjusting mechanism 5.

  The blade edge adjusting mechanism 5 includes an element shown in FIG. 5, that is, an adjusting member 9 in which a gap 8 is generated between the cutter body 2 and a connecting member 10 that fixes the adjusting member 9 to the cutter body 2 in the longitudinal direction. The adjustment screw 11 applies a force to the input portion 9a of the adjustment member 9. The input part 9a is located away from the connecting member 10. In the cutter 1 </ b> A of the first form, the adjustment member 9 and the connecting member 10 are integrally formed with the cutter body 2.

  The adjustment screw 11 is screwed into the input portion 9 a of the adjustment member with the axis centered in the cutter radial direction, and a tip penetrating the input portion 9 a is brought into contact with the outer periphery of the cutter body 2.

  The cutter of the 1st form comprised in this way adjusts the position (blade edge position) of the chip | tip 6 with which each chip seat 3 is mounted | worn as follows. The adjustment is performed by first loosening the clamp screw 7 and then operating the blade edge adjusting mechanism 5 of the tip to be adjusted. When the adjusting screw 11 is tightened, the input portion 9a of the adjusting member 9 moves in the direction in which the gap 8 is enlarged as shown in FIG. 6, and accordingly, the entire adjusting member 9 is elastically deformed with the connecting member 10 as a fulcrum. To displace. At this time, the seat surface 3c (one end of the adjusting member 9) is also rotated and displaced in the direction opposite to the direction in which the input portion 9a moves with the connecting member 10 as a fulcrum, and the chip 6 with the seat surface 3c as a position reference. The blade edge position (here, the position in the cutter axis direction) is finely adjusted, and thereafter the clamp screw 7 is tightened to complete the adjustment operation.

  As can be seen from FIG. 5, the cutter 1 </ b> A of the first embodiment is configured such that the distance L <b> 1 from the input portion 9 a to the connecting member 10 is larger than the distance L from the connecting member 10 to the seating surface 3 c (one end of the adjusting member 9). Therefore, the displacement amount in the same direction of the seat surface 3c is reduced by the lever ratio with respect to the displacement amount in the adjustment screw shaft direction of the input portion 9a. The amount of adjustment of the blade tip position of the tip 6 is more than the reduced axial displacement amount because the amount of displacement of the adjustment screw shaft perpendicular to the blade surface adjustment amount when the seat surface 3c rotates about the connecting member 10 becomes the blade tip adjustment amount. Further reduction is made, and therefore finer adjustment can be performed as compared with the adjustment mechanism of Patent Document 1. S in FIG. 6 is an adjustment amount.

  7 and 8 show a cutter according to the second embodiment of the present invention. In this cutter 1B, the blade edge adjusting mechanism 5 is arranged on the center side of the cutter with respect to the tip seat 3 and is provided on the front surface of the cutter body 2, and the seat surface 3a for positioning the tip in the cutter radial direction is provided at one end surface of the adjusting member 9. Further, the chip seat 3 having the seating surfaces 3a to 3c is provided on the outer periphery of the front surface of the cutter body 2, and this structure is different from the cutter 1A of the first embodiment. Other configurations are not much different from the cutter 1A of the first embodiment.

  As with the cutter of the first embodiment, the blade edge adjusting mechanism 5 includes an adjustment member 9 that creates a gap 8 between the cutter body 2 and a connecting member 10 that connects the adjustment member 9 to the cutter body 2 (these are the And an adjustment screw 11 that applies a force to the input portion 9a of the adjustment member 9. The adjustment screw 11 is screwed into the adjustment member 9 from the cutter outer diameter side toward the inner diameter side, and when the adjustment screw 11 is tightened by receiving the tip of the adjustment screw 11 penetrating the input portion 9a with the cutter body 2. The input portion 9a is pushed and moved in the direction in which the gap 8 expands, and the adjustment member 9 is elastically deformed with the connecting member 10 as a fulcrum, and the operation changes the cutter radial direction position of the seat surface 3a, and the cutting edge position is the same direction To be adjusted. Thus, the present invention can also be applied to blade edge position adjustment in the cutter radial direction.

  9 to 11 show a cutter according to a third embodiment of the present invention. The cutter 1A of the first form applies the force to the adjustment member 9 with the adjustment screw 11 directed in the cutter radial direction to elastically deform the adjustment member 9, whereas the cutter 1C of the third form has a gap 8 Is applied to both the radially inner side and the rearward in the circumferential direction (backward as viewed in the cutter rotation direction) of the adjustment member 9, and a force is applied to the input portion 9a of the adjustment member 9 with the adjustment screw 11 installed toward the cutter circumferential direction. The adjusting member 9 is elastically deformed, and its configuration is different from the cutter of the first embodiment. The structure of the third embodiment can also be adopted for a cutter that allows operation of the adjusting screw 11 from the chip pocket 4 side.

  12 to 15 show a cutter 1D according to a fourth embodiment of the present invention. Although this 4th form has shown the example of application to a multi-blade cutter, the basic composition does not change with the cutter 1A of a 1st form. Accordingly, the same elements as those in the first embodiment are denoted by the same reference numerals and detailed description thereof is omitted.

16 to 18 show a cutter according to a fifth embodiment of the present invention. The cutter 1E of the fifth form is
A locator 12 is fixedly attached to the outer periphery of the cutter body 2 with mounting bolts 13, and the chip 6 is mounted on the chip seat 3 formed on the locator 12. The locator 12 is provided with a blade edge adjusting mechanism 5 having the same structure as that provided in the cutter 1A of the first embodiment, and the blade edge adjusting mechanism 5 can finely adjust the cutter axial direction blade edge position of the tip 6. .

  In the cutter 1E of the fifth embodiment, the adjusting member 9 and the connecting member 10 of the blade edge adjusting mechanism 5 are provided in the locator 12 that is processed separately from the cutter body 2, so that the clearance 8, the adjusting member 9, and the connecting member 10 are processed. Excellent in properties.

  In addition, as shown in FIGS. 19 and 20, the blade edge adjusting mechanism 5 employed in the cutter of the present invention has the input portion 9 a of the adjusting member 9 on one end side of the adjusting member 9 (having a chip positioning surface) rather than the connecting member 10. It is also possible to arrange them on the side). In the structure of FIG. 19, when the adjustment screw 11 is tightened, the input portion 9 a is pushed in the direction in which the gap 8 is expanded, and the adjustment member 9 is elastically deformed with the connecting member 10 as a fulcrum. Further, in the blade edge adjusting mechanism 5 of FIG. 20, the adjusting screw 11 is replaced with a flat head screw or the like, and the tip end side of the adjusting screw 11 passing through the input portion 9a is screwed into the cutter body 2 (or the locator 12). When the adjusting screw 11 is tightened, the input portion 9a is pulled in the direction in which the gap 8 is reduced, and the adjusting member 9 is elastically deformed with the connecting member 10 as a fulcrum. In both cases, the surface that serves as the position reference (one end surface of the adjustment member 9) is displaced by the elastic deformation of the adjustment member 9, and the blade edge position changes.

  In the cutters according to the first to fifth embodiments described above, the adjusting member 9 and the connecting member 10 of the blade edge adjusting mechanism 5 are formed integrally with the cutter body 2 (or the locator 12). However, as shown in FIG. The connecting member 10 is configured as a part independent of the cutter body 2 (or locator 12), and the cutting edge adjusting mechanism 5 is configured by attaching the part to the cutter body 2 (or locator 12) using a fastening element 14 such as a bolt. Something to do is also conceivable. The blade edge adjusting mechanism 5 can be retrofitted to the cutter body 2, and at that time, the dimensions and the like can be corrected. Therefore, the adjusting member 9 and the connecting member 10 are attached to the cutter body 2 (or the locator 12). Compared to the one formed integrally, the precision at the time of manufacture is not strictly required, and there is an advantage that it is easy to manufacture.

The perspective view of the cutter of the 1st form Side view of the cutter of FIG. Front view of the cutter of FIG. Sectional drawing of the principal part of the cutter of FIG. Sectional drawing which shows the detail of the blade edge | tip adjustment mechanism of the cutter of FIG. Explanatory drawing of adjustment operation of the blade edge adjusting mechanism of FIG. Sectional drawing of the principal part of the cutter of 2nd form Front view of the cutter in FIG. Side view of the cutter of the third form Front view of the cutter of FIG. Sectional drawing of the principal part of the cutter of FIG. The perspective view which shows a part of cutter of a 4th form Side view of the cutter of FIG. FIG. 12 is a front view of a part of the cutter of FIG. Sectional drawing of the principal part of the cutter of FIG. Side view of the cutter of the fifth form Front view of the cutter of FIG. Sectional drawing of the principal part of the cutter of FIG. Sectional drawing which shows the other example of a blade edge | tip adjustment mechanism Sectional drawing which shows the further another example of a blade-tip adjustment mechanism The figure which shows the example which cut | disconnected the adjustment member and connection member of the blade edge | tip adjustment mechanism from the cutter body (or locator 12).

Explanation of symbols

1A to 1E Cutter 2 Cutter body 3 Tip seats 3a to 3c Seat surface 4 Chip pocket 5 Cutting edge adjustment mechanism 6 Tip 6a Mounting hole 7 Clamp screw 8 Clearance 9 Adjusting member 9a Input portion 10 Connecting member 11 Adjusting screw 12 Locator 13 Mounting bolt 14 Fastening element

Claims (4)

This is a blade-tip replaceable cutter in which a tip seat (3) is provided on the cutter body (2) or a locator (12) attached to the cutter body, and a blade tip replaceable tip (6) is detachably attached to the tip seat (3). Then, the adjustment member (9) in which a gap (8) is generated between the cutter body (2) and the locator (12), and the cutter member (2) or locator ( 12) a cutting edge adjusting mechanism (5) composed of a connecting member (10) fixed to 12) and an adjusting screw (11) for applying a force to the input portion (9a) of the adjusting member (9);
A seating surface serving as a positioning reference for the cutting edge of the tip seat (3) is constituted by one end surface of the adjustment member (9),
The input member (9a) is moved in the axial direction of the adjusting screw by the thrust of the adjusting screw (11) to elastically deform the adjusting member (9) with the connecting member (10) as a fulcrum, and accompanying the elastic deformation A blade-tip-exchangeable cutter with an adjustment mechanism in which the blade-tip replaceable tip (6) is brought into contact with one end surface of the adjusting member that is displaced in order to position the tip.   The blade-tip-exchangeable cutter with adjusting mechanism according to claim 1, wherein the adjusting member (9) and the connecting member (10) of the blade-tip adjusting mechanism (5) are formed integrally with the cutter body (2) or the locator (12).   The adjustment screw (11) is elastically deformed by pushing the input part (9a) in the direction in which the gap between the cutter body (2) or the locator (12) increases. The blade-tip-exchangeable cutter with an adjusting mechanism according to claim 1 or 2.   The adjustment screw (11) is elastically deformed by pulling the input portion (9a) in a direction in which the gap between the cutter body (2) or the locator (12) is reduced. The blade-tip-exchangeable cutter with an adjusting mechanism according to claim 1 or 2.

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