JPS5936388Y2 - Centering tool - Google Patents

Description

[Detailed description of the invention] The present invention relates to a centering tool that is used for various measuring operations such as flatness, parallelism, right angle dust, etc., including centering measurement of workpieces during machining. In particular, it is an object of the present invention to provide a tool that can be attached to the end surface of the inner cylinder of a milling chuck by adsorption and that is easy and convenient to handle.

Below, embodiments of the present invention will be described based on the drawings.
The figure shows the centering tool according to the present invention being suctioned and fixed to the end surface of the inner cylindrical body of a milling chuck, which will be described later. At the open end, a base attachment body 2 having a diameter slightly smaller than the inner diameter of the open end is attached in a fitted manner, with its upper surface serving as a suction surface adsorbed to the end surface of the inner cylindrical body of the chuck 1, which will be described later. There is.

A first arm 3 extends horizontally from the lower surface of the base mount 2 and is fixed to the base mount 2 with a bolt 4.

Reference numeral 5 designates a second arm extending horizontally from the end of the first arm 3. At the end of the second arm 5, a third arm 6, which is the final arm in the illustrated example, also extends in the horizontal direction. Each of the plurality of arms is pivotally extended, and each pivot part of the plurality of arms is pivotally screwed to each other by bolts 7.8 through specially made washers which will be described later, so that the arms can swing freely in the horizontal direction.

In the example shown, the number of arms is three; however, the present invention is of course not limited to this, and the number of arms may be three or more, but it is normal to use three arms as the central It is functionally sufficient if the cost is extended.

In the illustrated example, a dial gauge 9 is attached to the third arm 6, which is the final arm.

To briefly explain the mounting structure between the gauge 9 and the third arm 6, as shown in FIG. In this third arm 6, a mounting member 12, in which a stem 10 of the gauge 9 is inserted and clamped into a fitting hole 11 in the direction of the third arm, is pivoted by a stop pin 13 so as to be able to swing up and down. Fixed.

A spring (not shown) is interposed in the inner part of the third arm 6 to urge the mounting member 12 upward using the stop pin 13 as a fulcrum between the top of the inner surface of the third arm and the top surface of the mounting member. At the same time, a rotating pin 14 is provided on the front upper surface of the third arm 6 and passes through the third arm 6 and comes into contact with the upper surface of the mounting member 12. By operating this rotating pin 14, the gauge 9 is integrated with the mounting member 12. The vertical swing angle can be adjusted freely.

Further, the mounting member 12 which fits and holds the stem 10 of the gauge 9 in the fitting hole 11 is provided with an adjusting screw 15 that allows the fitting hole 11 to be tightened and loosened freely. The gauge 9 can be freely adjusted in swing around the stem 10, and the gauge 9 can be attached to and detached from the mounting member 12 if necessary.

Here, the base mounting body 2 will be described in detail. As shown in FIG. The body 17 is embedded with its end surface exposed, and this cylindrical body 1
A plate-like or powder-like magnet 18 is embedded inside the magnet 7, and the magnet 18 is further enclosed with a plate-like member 19 usually made of iron. It is something that

The base mounting body 2 is fixed by suctioning its upper end surface, which serves as a suction surface, to the end surface of the inner cylinder body 20 of the milling chuck 1. As shown in the figure, the embedding position of the non-magnetic cylindrical body 17 is determined so as to straddle the magnetic body 16 and the plate-like member 19.

Next, to explain in more detail the respective pivots of the plurality of arms, each arm is pivotally screwed together by the bolts 7 and 8 as described above, but as shown in FIG. In this case, the joint surfaces of the arm 3.5 and the arms 5 and 6 and the joint surface of the head of the bolt 7.8 and the arms 3 and 5 are made of resin (preferably For example, the structure is such that it is pivotally screwed with washers 21 and 21' made of MC Nylon (trade name) interposed therebetween.

Using the centering tool with the above configuration, as shown in Figure 5,
When performing so-called centering measurement operations such as centering, flatness, and parallelism measurements as shown in FIG. After that, each arm is oscillated in the horizontal direction, and if necessary, the vertical oscillation angle and head oscillation angle of the gauge 9 are adjusted to move the measuring tip A of the gauge 9 to the desired angle and position of the workpiece B. The centering operation can be performed much more simply and conveniently than when using a conventional stand type.

In the centering tool of the present invention, when the base mounting body 2 is suctioned and fixed to the end face of the inner cylinder of the milling chuck 1, the end face of the inner cylinder is exposed to the magnetic material via the non-magnetic cylinder 17. Since the main body 16 and the plate-like member 19 are straddled, the upper end surface of the base attachment body 2, which serves as a suction surface, and the end surface of the inner cylinder body of the chuck 1 are individually secured with the most stable and strong suction force. .

That is, in the state shown in FIG. 3, opposite magnetic poles are generated between the main body 16 and the plate member 19 due to the embedded magnet 18, and when both of these opposite magnetic poles and the end surface of the inner cylinder are joined, the maximum This provides adsorption power.

On the other hand, if the embedded position of the non-magnetic cylindrical body 17 is shifted inward or outward from the state shown in FIG. In this case, the adsorption force is significantly reduced.

By the way, in the base mounting body 2 having a magnet-embedded structure as shown in FIG.
Therefore, metal pieces such as cutting chips will not be accidentally attracted to this portion during centering operations.

The centering tool of the present invention is normally used by suctioning and fixing the base mounting part 2 to the end surface of the inner cylinder body of the milling chuck 1, but if necessary, it can be used with the tool mounting base of a lathe, etc. It is also possible to use it in the same way as a conventional stand type by attaching it to the stand.

In addition, in the centering tool of the present invention, the resin washer 21 whose outer periphery is formed into an upper and lower bifurcated shape is used at the pivot portion of each arm.
．． 21', this washer 21
．． As a function of 21', although each arm swings smoothly when the arm swings, once the swing of the arm is stopped, a considerably large resistance force is applied to prevent the arm from swinging again. Due to this characteristic, it is more convenient for positioning the measuring point A of the gauge 9, and it is even more convenient to handle.

As described above, the centering tool of the present invention can be attached to the end surface of the inner cylindrical body of the milling chuck 1 by suctioning and fixing its base attachment part 2, and furthermore, The end face is designed to have the most stable and firm adsorption, and the pivot portion of each arm is designed to increase the inertia of the arm, so the synergistic effect of these makes it extremely easy to handle and operate. It is considered simple and convenient.

[Brief Description of the Drawings] Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along line AA, Fig. 3 is a cross-sectional view taken along line B-B, and Fig. 4 is a cross-sectional view taken along line B-B. It is a sectional view along C-C1 or DD of the same, and FIGS. 5 and 6 are explanatory diagrams of the same usage state. 1... Milling chuck, 2... Base mounting body, 3
...First arm, 5...Second arm, 6...Third arm
Arm, 9...Dial gauge, 16...Body, 1
7... Cylindrical body, 18... Magnet, 19... Plate member, 20... Inner cylinder, 21.21'... Washer.

Claims (1)

[Scope of utility model registration request] A first arm is horizontally extended and fixed from a base mounting body that is suction-fixed to the end surface of the inner cylinder body of the milling chuck, and a plurality of second arms are attached to the first arm, a third arm is attached to the second arm, and so on. This centering tool has a book arm extending horizontally and a dial gauge attached to the final arm, and the base mounting body is attached to the upper end surface, which is the attraction surface of the main body, which is cut out from the magnetic material. A cylindrical body made of magnetic material is embedded with its end surface exposed, and a magnet covered with a plate-like member of magnetic material is embedded inside the cylindrical body, and the magnet is attracted to the end surface of the inner cylindrical body of the milling chuck. In this state, the non-magnetic cylindrical body is positioned and rounded so that the end face of the inner cylindrical body straddles the magnetic body and the plate member over the entire circumference, and furthermore, the plurality of arms are A centering tool characterized in that each pivot is screwed into the pivot via a resin washer whose outer periphery is formed into an upper and lower trifurcated shape.