JPH08124Y2 - Tool grinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a tool grinder, and more particularly to a structural improvement of a tool grinder that grinds the nose angle of a cutting tool.

[Prior Art] The angle shape of the cutting edge of the cutting tool is strictly determined in order to perform good cutting, and the cutting edge worn by use is reformed again by the rotary grindstone of the grinder.

In this case, in order to form the nose angle of the cutting edge, there is a case where a mechanism for swinging the bite cutting edge to the left or right around the grinding point of the rotary grindstone is provided. It makes you turn.

[Problems to be solved by the invention] By the way, as shown in FIG. 5, when forming the so-called left-handed or right-handed bite nose angle in which the tip of the cutting tool T is largely bent left and right, the turning table 1 is ground to the grinding point. When the required amount of turning is made around A, the rear end of the turning table 1 may interfere with the coolant scattering prevention cover C provided between the turning table 1 and the grindstone base. When the amount of overhang is shortened, there is a problem that the required bite turning amount cannot be secured.

The present invention solves such a problem, and an object of the present invention is to provide a tool grinder capable of turning only the tool by a necessary amount while limiting the turning amount of the entire tool base within a certain limit.

[Means for Solving the Problems] The structure of the present invention will be described. A turning table 1 that is driven to turn around a grinding point A where the tip of a tool T (FIG. 1) abuts on a rotary grindstone G, and the turning. Substrate 2 provided on table 1
And the auxiliary swivel plate 4 that is swivelably provided around the pin member 3 erected on the substrate 2 so as to match the swivel axis S of the swivel table 1, and the auxiliary swivel plate 4 is positioned at an arbitrary swivel position. Means 51, 52 and a tool holding base 6 for holding the tool T provided on the auxiliary swivel plate 4 are provided.

[Operation] In the above configuration, if the auxiliary swivel plate 4 is swiveled on the substrate 2 by a predetermined amount in advance in a direction in which interference with the coolant splash prevention cover C becomes a problem when the swivel table 1 is swung, Even if the turning amount of the turning table 1 is reduced by the predetermined amount, the tool T reaches a desired turning position around the grinding point, and the turning amount is reduced, so that the turning table 1 interferes with the coolant splash prevention cover C. There is no problem of doing.

[Embodiment] In FIG. 1, reference numeral 1 is a turning table, which is turned by a turning drive motor (not shown) about a turning axis S in the forward and reverse directions. The turning axis S passes through the grinding point A where the tip of the cutting tool T contacts the rotating grindstone G. The rotary grindstone G is fixed to the tip of a rotary shaft G1 which is inserted through a grindstone shaft head (not shown), and is rotated by a rotary drive motor provided on the grindstone base.

A substrate 2 is placed on the top surface of the protrusion of the turntable 1, and the substrate 2 can be moved and adjusted in the left-right direction in the drawing.
The substrate 2 has a substantially fan-like shape with the rear end being an arc surface (Fig. 2),
A substantially rectangular auxiliary swivel plate 3 is slidably provided on the upper surface thereof. The head of the pin member 3 is embedded and fixed in the center of the front end portion of the auxiliary swivel plate 3, and the foot of the pin member 3 has the base plate 2
It is rotatably fitted in the through hole. The center of the pin member 3 coincides with the swivel axis S.

The base plate 2 has arcuate guide grooves 21 and 22 extending in the width direction around the pin member 3 at the front and rear ends thereof, and these guide grooves 21 and 22 have an inverted T-shaped cross section. In the groove, a nut 51 is provided so as to be slidably movable along the groove. Bolts 52 penetrating the auxiliary swivel plate 3 are screwed into these nuts 51. Then, by loosening the bolt 52, the auxiliary swivel plate 3 can swivel around the pin member 3 until it is regulated at both ends of the guide grooves 21 and 22, and the auxiliary swivel plate 3 is positioned by tightening the bolt 52 at a desired swiveling position. Fixed. The turning position at this time can be known from the angle scale marked on the rear end face of the substrate 2, as shown in FIG.

A tool holder 6 is provided on the substrate 2, and the tool holder 6 is composed of a column 61 and a holder 62 supported by the column 61 and holding the bite T. A holding groove 63 having a rectangular cross section is formed in the center of the upper surface of the holding portion 62.
The base end of the cutting tool T is inserted and fixed therein, and in this state, the tip of the cutting tool is positioned at the grinding point A of the rotary grindstone G.

In the tool grinder having the above structure, for example, when forming the left nose bit nose angle, the bolt 52 is loosened and the auxiliary swivel plate 3 is swung rightward by a predetermined angle θ as shown in FIG. . As a result, even if the turning amount of the turning table 1 is reduced by the angle θ, the bite T reaches a desired turning position with the grinding point A as the center, and the required nose angle can be formed. Further, by reducing the turning amount, the rear end of the turning table 1 does not interfere with the coolant scattering prevention cover C.

[Effects of the Invention] As described above, according to the tool grinder of the present invention, especially in the nose angle forming of the left and right hand tools, the turning amount of the turning table in the direction of interfering with the coolant scattering prevention cover is made small to cover the cover. It is possible to form the required nose angle while preventing interference with the.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention. FIG. 1 is a partial sectional side view of a tool holding part of a tool grinder, FIG. 2 is its plan view, and FIG. 3 is its rear view. FIG. 4 is a plan view showing the operation of the tool holder, and FIG. 5 is a plan view of the tool holder of the conventional tool grinder. 1 ... Revolving table 2 ... Substrate 21, 22 ... Guide groove 3 ... Pin member 4 ... Auxiliary swivel plate 51 ... Sliding nut (positioning means) 52 ... Bolt (positioning means) 6 ... Tool holding Table 61 …… Holding groove A …… Grinding point C …… Coolant scattering prevention cover T …… Bite (tool) G …… Rotating whetstone

Claims (1)

[Scope of utility model registration request] 1. A revolving table which is revolved around a grinding point at which a tool tip comes into contact with a grinding wheel, a substrate provided on the revolving table, and an upright position on the substrate in conformity with a revolving axis of the revolving table. The auxiliary swivel plate provided around the pin member so as to be rotatable, fixing means for fixing the auxiliary swivel plate at a predetermined swivel position, and a tool holding base provided on the auxiliary swivel plate for holding a tool. Tool grinder.