JPS6037255Y2 - grinding jig - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a jig, and particularly to a grinding jig suitable for grinding away casting beams or weir marks on a cylindrical surface.

Grinding equipment is generally well known in which the casting is fixed to a plurality of grinding jigs placed on a rotary table and a grinding wheel is placed above the grinding tool to remove casting beams or weir marks from the casting. It is widely used.

With such a device, weir marks formed on a flat surface can be easily ground, but it is impossible to remove weir marks formed on a cylindrical surface, so manual polishing is performed.

This method is not only weak and hinders the improvement of grinding work efficiency, but also has large variations in dimensions, which is not a preferable method from a quality control standpoint.

An object of the present invention is to provide a grinding jig suitable for removing weir marks installed on the cylindrical surface of a cast product.

Embodiments of the present invention will be described in detail below with reference to the drawings.

Fig. 1 is a plan view of the grinding device, Fig. 2 is a plan view of the grinding jig, Fig. 3 is a vertical sectional view, Fig. 4 is a side view, Fig. 5 is an explanatory diagram during grinding, and Fig. 6 is a plan view of the grinding jig. FIG. 7, which is an explanatory diagram when the grinding is completed, shows a cross-sectional view of the weir mark portion of the workpiece (A-A cross-sectional view in FIG. 2).

A fixed base 2 is fixed to the upper surface of a rotary table 1 connected to a drive source (not shown), and this fixed base 2 supports a movable base 4 having a swing shaft 3 in the radial direction of the rotary table 1. are doing.

Further, a locking piece 5 is fixed to the swing shaft 3, and a stopper 6 that engages with the locking piece 5 is provided, so that the movable base 4 is caused to swing as the rotary table 1 rotates. 7 is a grinding wheel, 8 is a cast product, and 9 is a weir mark of the cast product 8.

Next, the effects of the above configuration will be explained.

Since the cast product 8 has two prongs at one end and a through hole in the center, the two prongs and the hole at the other end are fixed by a jig fixed to the movable base 4.

Eight of these cast products 8 are mounted on a rotary table 1, and weir marks 9 are ground away using a grinding wheel 7.

When the rotary table 1 rotates and the grinding jig mounted with the cast product 8 reaches below the grinding wheel 7, grinding begins.

The size of the weir marks 9 to be ground varies depending on the cast product, but the cast product 8 that is the object of the present invention has weir marks 9 between 90 degrees as shown in FIG.

Therefore, the casting 8 is mounted with a 45 DEG deviation to the left, as shown in FIGS. 4 and 7.

Note that the rotational direction of the rotary table 1 and the grinding wheel 7 is the direction shown by the arrow.

Grinding is started in the state shown in FIG.

At this time, the rotary table 1 is continuously rotating, but the locking piece 5 engages with the fixed stopper 6.

Therefore, the movable base 4 to which the locking piece 5 is fixed is gradually swung rightward, and when it has swung 45 degrees, it is in the state shown in FIG. 5.

When the rotary table 1 further rotates, the movable base 4 further swings, and the grinding of the weir marks 9 by the grinding wheel 7 progresses.

When the movable base 4 swings 90 degrees from the time point at which grinding of the weir mark 9 starts, the state shown in FIG. 6 is reached, and the grinding work of the weir mark 9 is completed.

When the rotary table 1 continues to rotate after the grinding process is completed, the locking piece 5 is disengaged from the stopper 6, so that the movable table 4 is restored to its original state.

In this way, when the rotary table 1 rotates and reaches the bottom of the grinding wheel 7, the locking piece 5 engages the stopper 6. At the same time, the grinding work of the weir marks 9 is automatically performed.

Therefore, the weir marks 9 of the cast product 8 are ground with the axis of the swing shaft 3 as the center of rotation, so that the grind marks are beautiful and have very good dimensional accuracy.

As is clear from the above description, the grinding jig according to the present invention has many excellent effects as described below.

- The structure is extremely simple because the drive source is only the drive source for the rotary table and no other drive source is required.

2. Since the operator only needs to install and remove the cast product, no skilled person is required and the grinding work can be carried out efficiently without fatigue.

3. The grinding marks are extremely beautiful and can significantly improve dimensional accuracy.

4. The swing angle of the grinding surface can be freely selected depending on the fixed position of the stopper.

5. By making the contact surface of the locking piece that engages with the stopper not a straight line but an arbitrary curved surface, the grinding speed can be partially changed, so the optimum grinding speed can be easily selected according to the shape of the weir mark. I can do it.

Although a round bar was used as the stopper in the embodiment, a rotating roller can be used to prevent wear and achieve smooth grinding.

The grinding jig of the present invention, which has many excellent effects as described above, can significantly reduce costs and improve quality.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the grinding device, Fig. 2 is a plan view of the grinding jig, Fig. 3 is a vertical sectional view, Fig. 4 is a side view, Fig. 5 is an explanatory diagram during grinding, and Fig. 6 is a plan view of the grinding jig. An explanatory diagram at the time of completion of grinding, Figure 7 is the second
It is a sectional view (sectional view of a weir trace part) of the figure.

Claims (1)

[Scope of utility model registration request] A fixed base is fixed to the upper surface of a rotary table connected to a drive source, the fixed base supports a movable base having a swing shaft in the radial direction of the rotary table, and a locking piece is fixed to the swing shaft. death,
A grinding jig characterized in that it is provided with a stopper that engages with the locking piece, and allows a movable base to swing as the rotary table rotates.