JPS6128648Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the mounting and centering of a cutting tool in the turret of a lathe.

Conventionally, most of the methods for attaching a cutting tool to a turret have been done by bolting, so chips get wrapped around the head of the bolt during cutting, adversely affecting the cutting operation and making it difficult to dispose of the chips. In addition, when centering the tool, the same problem as above occurred because it was done by adjusting the feed screw.When using this structure, when centering the tool, it is necessary to adjust the mounting standard of the tool. In many cases, machining accuracy affects centering accuracy. The present invention aims to eliminate these drawbacks and facilitate the installation and centering of the cutting tool.

1 is a turret supported indexably on the turret axis A; 2 is a slot extending in the radial direction of the turret axis A and provided at equal intervals on the circumference of the turret 1; 3 is a turret plane perpendicular to the turret axis. The holding holes are provided on the turret 1 at equal intervals and have an axis on the hole center line B which is at an angle to the turret plane and have equal radii. It intersects with 2. Reference numeral 4 denotes a pair of elongated holes extending in the direction of the hole center line so as to face each other on the circumference of the hole center line of the holding hole 3, and passing through the side surface of the turret 1. Reference numeral 5 communicates with the slot 2 and connects the turret axis. The holding hole 3 can be engaged with the first gripping piece in the shape of a crescent, which has a holding surface parallel to the holding surface and is movable forward and backward in the direction of the hole centerline and can be pivoted around the hole centerline. 6 faces the holding surface 5a of the first gripping piece 5 across the slot 2, and has a holding surface 6a that communicates with the slot 2 and is parallel to the turret axis, and a locking and holding surface 6b that is perpendicular to the turret axis. The holding hole 3 can be freely engaged with the holding hole 3 by a tri-moon-shaped second gripping piece that can freely move forward and backward in the direction of the hole centerline and pivot around the hole centerline. 7 is inserted through the elongated hole 4 on the holding hole 3 on the turret 1 to attach the first gripping piece 5 and the second gripping piece 6, respectively.
With the adjustment bolt screwed into
and adjusts the second gripping piece 6 and the holding hole 3. 8 is a cutting tool that is clamped between the holding surface 5a of the first gripping piece 5 and the holding surface 6a of the second gripping piece 6 across the slot 2; and a bolt that positions the first gripping piece 5 and the second gripping piece 6 at the converted position when the phase is changed to an appropriate rotation angle position by pivoting around the hole center line in the holding hole 3 together with the second gripping piece 6. Then, screw together the second gripping piece 6 from the side wall of the turret 1.
The tip of the bolt 9 is in contact with the side surface of the bolt 9.

Hereinafter, the operations for attaching the cutting tool and adjusting the centering of the present invention will be explained.

The tool 8 is installed by placing it between the holding surface 5a of the first gripping piece 5 and the holding surface 6a of the second gripping piece 6 across the slot 2 on the turret 1, and screwing it into the first gripping piece 5. As the adjustment bolt 7 is tightened, the first gripping piece 5 approaches the turret axis due to the wedge action along the tapered surface of the holding hole 3 with which the first gripping piece 5 engages. When the holding surface 5a contacts the shank of the cutting tool and is further tightened, it is clamped. Therefore, even if the shaft radius or height of the cutting tool 8 is different, the cutting tool 8 can be clamped by relatively moving the first gripping piece 5 toward or away from the turret axis via the adjustment bolt 7.

Next, in the centering operation of the cutting tool 8, the centering height adjustment is performed by cutting off the wedge action of the tapered surfaces of the holding holes 3 of the first gripping piece 5 and the second gripping piece 6 in the previous operation, and The phase can be changed by rotating the cutting tool 8 together with the first gripping piece 5 and the second gripping piece 6 to a rotation angle position on the hole center line where the cutting edge of the cutting tool faces toward the center of the object. After that, it is only necessary to clamp the cutting tool 8 in the previous mounting operation.

Next, the longitudinal adjustment of the centering is performed by adjusting the adjustment bolt 7 that is screwed into both the first gripping piece 5 and the second gripping piece 6. This is done by moving the gripping piece back and forth along the surface in the direction of the center line of the hole, and each gripping piece is later clamped in the holding hole by a wedge action.

As described above, the present invention has a simple configuration that allows for accurate installation and centering adjustment of the cutting tool.
It can be removed from the harmful effects of chips.

[Brief explanation of the drawing]

Figure 1 is a front view showing the turret incorporating the tool mounting and centering device of the present invention;
The figure is a sectional view of the main part taken along the arrow line E-A in Fig. 1, Fig. 3 is a cutaway view of the main part showing adjustment of the centering of the cutting tool, and Fig. 4 is a longitudinal view of centering when the shaft width of the cutting tool is different. Cross-sectional view during adjustment.

Claims (1)

[Scope of utility model registration request] Holding holes 3 having equal radii and having their axes on the hole center line B, which are provided at equal intervals on the circumference of the turret plane perpendicular to the turret axis A and are at an angle to the turret plane; The cutting tool is attached in the radial direction of the cutting tool 3, and has holding surfaces 5a and 6a that relatively sandwich the shank side surface of the cutting tool parallel to the turret axis A, and has a locking and holding surface 6b perpendicular to the turret axis A on one side. a pair of gripping pieces 5 and 6 that can be freely engaged with the holding hole 3;
A tool mounting and centering device comprising an adjustment bolt 7 which is inserted through a pair of elongated holes 4 extending in the direction and extending through the side surface of the turret 1 and threadedly engaged with the gripping pieces 5 and 6.