WO-2026094336-A1 - ROTARY TOOL AND TURRET TOOL POST PROVIDED WITH ROTARY TOOL

WO2026094336A1WO 2026094336 A1WO2026094336 A1WO 2026094336A1WO-2026094336-A1

Abstract

In order to facilitate assembly in a state in which the phase position of a key member of a driven shaft and the phase position of a shank key of a sleeve are maintained at specific phase positions, and to rotate the driven shaft and the sleeve integrally, a rotary tool (10), which is disposed on a turret surface (52) of a turret (50), comprises a bevel gear member (16) that is connected to a rotatable tool main body (11) having a key notch (11d) in a peripheral surface thereof, and a driven shaft (17) that is connected to a drive shaft (63), which is provided in the turret (50), only in a state in which the turret surface (52) on which the rotary tool (10) is disposed is disposed at a preset machining position (P1), wherein the driven shaft (17) has, at one end, a tenon (17a) that engages with the drive shaft (63); and a phase adjustment mechanism (18) is disposed between the bevel gear member (16) and the driven shaft (17), the phase adjustment mechanism (18) switching between a separated state in which the bevel gear member (16) and the driven shaft (17) are free to rotate about an axis (C3) of the driven shaft (17) independently of one another, and a connected state in which the bevel gear member (16) and the driven shaft (17) are fixed together integrally.

Inventors

SUZUKI TOSHIYUKI
HOTTA KAZUHIRO
IIZUKA Yuusaku

Assignees

シチズンマシナリー株式会社

Dates

Publication Date: 20260507
Application Date: 20250707
Priority Date: 20241029

Claims (10)

A rotary tool positioned on one of the multiple turret surfaces of the turret, The rotary tool comprises a gear member connected to a rotatable tool body having a key notch on its circumferential surface, and a driven shaft connected to a drive mechanism provided on the turret only when the turret surface on which the rotary tool is positioned is set to a predetermined machining position. The driven shaft has a key member at one end that engages with the drive mechanism, A rotary tool having a phase adjustment mechanism positioned between the gear member and the driven shaft, which switches between a separated state in which the gear member and the driven shaft rotate independently of each other around the axis of the driven shaft, and a connected state in which the gear member and the driven shaft are fixed together as a single unit.
The rotary tool according to claim 1, wherein the phase adjustment mechanism integrally fixes the driven shaft and the gear member such that, in the connected state, when the key member is in a first phase position around the axis of the driven shaft, the key notch is in a second phase position around the axis of the tool body.
The first phase position is a phase position along the plane on which the turret rotates, with respect to the axis of the driven shaft. The rotary tool according to claim 2, wherein the second phase position is a phase position around the axis of the tool body where a magazine key of a magazine for an automatic tool changer that replaces the tool body is formed.
The rotary tool according to claim 3, wherein the second phase position is a phase position corresponding to the horizontal direction in which the magazine moves, at the exchange position where the turret surface on which the rotary tool is positioned is located, when the rotary tool is replaced by the automatic tool changer.
The phase adjustment mechanism comprises: a coupling mechanism disposed in the space between the driven shaft and the boss of the gear member in the radial direction centered on the axis of the driven shaft, which is displaced or deformed radially outward and inward when pressed in the axial direction of the driven shaft; a pressing member disposed in contact with the axial end face of the coupling mechanism; and a fastening member that moves the pressing member in the axial direction. The rotary tool according to claim 1, wherein a through hole is formed in the tool swivel portion that rotates the tool body, into which a tool for moving the fastening member in the axial direction is inserted from the outside of the tool swivel portion.
Between the tool body and the gear member, there is a sleeve having a shank key connected to the gear member. The rotary tool according to claim 1, wherein the sleeve is connected to the tool body by the shank key and the key notch being positioned in the same phase position around the axis of the tool body and engaging with each other, and the gear member is connected to the tool body via the sleeve.
A turret that rotates around an axis and has multiple turret surfaces, A rotary tool according to any one of claims 1 to 5, provided on any of the multiple turret surfaces, A turret tool post comprising: a drive mechanism that is connected to the key member of the driven shaft provided with the rotary tool only when the turret surface on which the rotary tool is provided is positioned at a predetermined machining position among a plurality of turret surfaces.
The turret is equipped with an annular anti-rotation ring formed around the axis of rotation, The turret tool post according to claim 7, wherein the anti-rotation ring has a guide surface that guides the key member of the driven shaft, which rotates around the axis of rotation of the turret as the turret rotates, while maintaining the phase of the driven shaft around its axis at a first phase position along the plane on which the turret pivots.
The anti-rotation ring is provided with a gap adjustment member in the portion facing the key member when the turret surface on which the rotating tool is provided is positioned at the replacement position for replacing the tool body. The turret tool post according to claim 8, wherein the gap adjustment member is set to have a smaller gap with the key member than the guide surface.
A thickness adjustment shim is provided, which is detachably positioned between the gap adjustment member and the body of the anti-rotation ring. The turret tool post according to claim 9, wherein the thickness adjustment shim is disposed between the gap adjustment member and the body of the anti-rotation ring.

Description

Rotary tools and turret tool posts equipped with rotary tools The present invention relates to a rotary tool and a turret tool post equipped with a rotary tool. A turret tool post has a turret formed in a polygonal shape around an axis. Each of the multiple turret surfaces has a tool attached. Some turret tool posts equipped with rotary tools are of the so-called single-drive type, where the drive mechanism rotates the tool body of the rotary tool only when the turret surface equipped with the rotary tool is positioned at the machining location (see, for example, Patent Document 1). The single-drive turret tool post described in Patent Document 1 has a key member (tenon) formed on the driven shaft that is linked to the tool body, and a key member (mortise groove) formed on the shaft of the drive mechanism. At the machining position, the key members (tenon and mortise groove) engage with each other, enabling the rotation of the tool body at the machining position. This is a perspective view showing a turret tool post and an automatic tool changer (ATC).This is a cross-sectional view of the inside of the turret tool post, including axis C1, showing the state where the turret surface to which the rotary tool is attached is in the position (exchange position) P2 when the tool body is changed by the magazine of the automatic tool changer (ATC).This is a cross-sectional view showing the inside of the turret tool holder, with an inclined surface at a 45-degree angle including axis C1, and shows the turret surface in the position (machining position) P1 where the rotary tool is used for machining the workpiece held in the automatic lathe.This diagram illustrates the exchange of the tool body using an ATC (Automatic Tool Changer), showing the positional relationship between the ATC magazine and the rotary tool from a perspective view taken from the rear of the turret.This is a cross-sectional view taken along the line A-A in Figure 6, showing the magazine key of the magazine claw inserted into the key cutout of the tool body.This is a horizontal cross-sectional view including shaft C2, showing the magazine key of the magazine claw inserted into the key cutout of the tool body.This is a perspective view showing the positional relationship between the tenon of the driven shaft and the anti-rotation ring when the turret surface is positioned in the replacement position, and the driven shaft and drive shaft are shown in cross-section.This is a view of the state shown in Figure 7, seen from the rear of axis C1.Figure 8 is a cross-sectional view taken along the line B-B.This is a cross-sectional view showing the configuration of the phase adjustment mechanism.This is an exploded perspective view showing the configuration of the phase adjustment mechanism.This is a diagram illustrating the operation of the phase adjustment mechanism. Cross-reference of related applications Embodiments of the rotary tool and turret tool post according to the present invention will be described below with reference to the drawings. <Turret Blade Rest> Figure 1 is a perspective view showing the turret tool post 100 and the automatic tool changer (ATC) 300. Figure 2 is a horizontal cross-sectional view of the interior of the turret tool post 100, including the axis C1, showing the turret surface 52 to which the rotary tool 10 is attached in the position (replacement position) P2 when the tool body 11 is replaced by the magazine 200 of the ATC 300. Figure 3 is a cross-sectional view of the interior of the turret tool post 100, including the axis C1, showing the turret surface 52 in the position (machining position) P1 where the rotary tool 10 is used for machining a workpiece held in the automatic lathe. The turret tool post 100 is one embodiment of the turret tool post according to the present invention, and the rotary tool 10 is one embodiment of the rotary tool according to the present invention. The turret tool post 100's operation is controlled by the computer numerical control (CNC) of the automatic lathe. <Turret> The turret tool post 100 is positioned on the bed 1, as shown in Figure 1. The bed 1 is positioned along an axis C5 that is inclined with respect to the horizontal direction W, and the turret tool post 100 moves along the axis C5 on the bed 1. The axis C5 extends in a direction inclined, for example, 45 degrees with respect to the horizontal direction W in a vertical plane. The turret tool post 100, as shown in Figures 1, 2, and 3, comprises a turret 50, a swivel mechanism 55, and a drive mechanism 60. The turret 50 swivels (rotates) in a circumferential direction R1 around axis C1. The turret 50 is formed in a polygonal shape when viewed in the direction of axis C1. The circumferential surface of the turret 50 around axis C1 forms turret surfaces 51 and 52 that extend parallel to axis C1. The turret surfaces 51 are multiple surfaces of the same size, while the turret surfaces 52 are, for example, a single surface that is wider