JPH0248200Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention relates to a workpiece positioning device, and is configured so that it can be installed on the table of a machine tool such as a milling machine, and the direction of the workpiece on the table can be determined simply by abutting one side of the workpiece. Concerning what has been done.

[Prior art and its problems]

In machining operations using a machine tool such as a horizontal milling machine, a dial gauge is used, for example, to detect the positional deviation of the workpiece, and the positioning is performed by correcting the deviation. That is, first, place the workpiece on the table so that the workpiece-side reference surface is approximately parallel to the side surface of the table that is parallel to the table movement direction, and place the measuring tip of the dial gauge on the workpiece-side reference surface. And move the dial gauge along the side surface of the table. At this time, the position of the workpiece is corrected so that the value indicated by the pointer of the dial gauge is constant, and the positioning is completed.
Then, in this state, the workpiece is fixed to the table via a mounting jig. By the way, in the above positioning work, since a dial gauge is used, the above series of positioning operations must be repeated every time the workpiece is replaced. Furthermore, it is similarly inconvenient when changing the surface to be machined of a workpiece during milling work, for example. Therefore, there is a problem in that it takes time to position or set the workpiece, which reduces work efficiency. On the other hand, a table of a machine tool such as a milling machine usually has a plurality of rows of parallel and linear mounting grooves for mounting mounting jigs. The present inventors focused on this mounting groove and attempted to innovate the current workpiece positioning work. This idea was devised under the above circumstances, and by simply attaching it to the mounting groove formed on the table of a milling machine, etc., and touching the side of the workpiece, the direction of the workpiece on the table can be adjusted. The object is to provide a workpiece positioning device that can define the

[Means to solve the problem]

In order to solve the above problems, this invention adopts the following technical means. That is, the device according to this invention is for positioning a workpiece on a table having a plurality of parallel mounting grooves, and is stably placed on the table and has a positioning surface on the side surface. A main body block is provided with a main body block, and at least two engagements are provided on the lower surface of the main body block that fit into the mounting groove without play and are non-rotatable relative to the main body block around an axis perpendicular to the table surface. At least one of the engaging parts is configured to be movable in parallel in a direction toward and away from the other engaging parts.

[Action and effect]

For example, the main body block is placed on the table so that the two engaging portions fit into the mounting grooves on the table. At this time, the engaging portion fits into the mounting groove without play and is provided so that it cannot rotate relative to the main body block around an axis perpendicular to the table surface, so the engaging portion fits into the mounting groove. Once fitted, the direction of the main body block on the table will be determined by itself. Thereafter, the position of the workpiece is determined by bringing, for example, a reference surface of the workpiece whose plane accuracy has been ensured in advance into contact with the positioning contact surface of the main body block. In this case, by setting the angle of the abutting surface with respect to the mounting groove, the direction of the workpiece on the table can be changed. For example, if the abutting surface of the main body block is perpendicular to the mounting groove when the positioning device is mounted on the table, the reference surface of the workpiece that comes into contact with this abutting surface will also be aligned with the mounting groove. It will be perpendicular to the groove. Therefore, it is possible to machine the side surface of the workpiece adjacent to the reference surface at right angles to the reference surface. In this way, since it is only necessary to bring the reference surface of the workpiece into contact with the abutment surface of the main body block, the positioning work is easier than when a conventional dial gauge is used. Moreover, even when different surfaces of the same workpiece are sequentially machined, the direction of the workpiece on the table can be easily determined by simply changing the side surface of the workpiece that is brought into contact with the contact surface of the main body block. Furthermore, since at least one of the engaging portions is movable in parallel in a direction toward and away from the other engaging portions, the spacing between the engaging portions can be changed in accordance with the spacing between the mounting grooves. can. Therefore, the above-mentioned positioning device can be mounted on a table having mounting grooves at various intervals. Therefore, the workability can be greatly improved compared to the conventional example.

[Explanation of Examples]

An example of this invention is shown below in Figures 1 to 3.
This will be explained in detail with reference to the drawings. As shown in FIG. 1, a workpiece positioning device 1 in this example is used for positioning a workpiece 4 on a table 3 having a plurality of parallel concave mounting grooves 2 in a machine tool, such as a milling machine. belongs to. The positioning device 1 includes the table 3
A rectangular parallelepiped main body block 5 is stably placed on the top and has a positioning contact surface 5a on its side surface.
A first engaging part 6 and a second engaging part 7 are provided on the lower surface 5b of the main body block 5 so as to be movable in parallel in directions toward and away from each other. That is, on the lower surface 5b of the main body block 5, a guide recess 5c for slidably guiding the first engaging part 6 and the second engaging part 7 is formed in the longitudinal direction thereof. Further, a screw hole 5d for mounting a mounting jig is formed on one side of the main body block 5, and a pair of elongated screw holes 5e, 5e are formed on the other side. On the other hand, as shown in FIGS. 1 and 3, the first engaging portion 6 and the second engaging portion 7 each have a certain level of planar precision so that they fit into the mounting groove 2 without wobbling. The lower portions 6a and 7a are shaped like rectangular parallelepipeds, and the lower portions 6a,
It also has upper portions 6b and 7b which are connected perpendicularly to 7a and fit into the guide recess 5c in the main body block 5 without rattling, having a cross-section of a substantially inverted trapezoid. In addition, both lower parts 6
A screw hole 6 corresponding to the screw through hole 5e, 5e of the main body block 5 is provided at one end side of a, 7a, respectively.
c, 7c are formed. Furthermore, the first engaging portion 6 and the second engaging portion 7
are the screw holes 5e and 5e of the main body block 5.
through the screw holes 6c, 7c of both the engaging parts 6, 7.
It can be assembled to the main body block 5 by tightening bolts 8, 8, respectively. The mounting groove 2 is formed with a certain degree of precision so that, for example, its dimensional tolerance meets the JIS display standards H7 to H8. Further, the reference surface 4a of the workpiece 4 that is brought into contact with the contact surface 5a of the main body block 5 has a certain degree of flatness accuracy secured in advance. How to use the positioning device 1 having the above configuration will be explained with reference to FIG. The main body block 5 is placed on the table 3 with the lower portions 6a, 7a of the first engaging portion 6 and the second engaging portion 7 being fitted into the mounting grooves 2, respectively. At this time, the first engaging part 6 and the second engaging part 7 fit into the mounting groove 2 without any play, and are not able to rotate relative to the main body block 5 around an axis perpendicular to the table surface. Since it is provided, the direction of the main body block 5 on the table 3 is defined. After that, the main body block 5
The reference surface 4a of the workpiece 4 is brought into contact with the contact surface 5a of the workpiece 4. Then, this workpiece 4 is fixed to the table 3 via the mounting jig 9, and the setting is completed.
At this time, since the abutting surface 5a is orthogonal to the mounting groove 2, the reference surface 4a of the workpiece 4 that comes into contact with the abutting surface 5a is also orthogonal to the mounting groove 2. I will do it. In this case, for example in a milling machine, since the mounting groove 2 is arranged parallel to the moving direction of the table 3, the side surface 4b of the workpiece 4 can be machined at right angles to its reference surface 4a. In this way, positioning is completed by simply bringing the reference surface 4a of the workpiece 4 into contact with the contact surface 5a of the main body block 5, so that the work time is shortened compared to the conventional example. In addition, as shown in FIG. 1, the main body block 5
A horizontally protruding portion 5f from one end side of the contact surface 5a.
may be coupled. This makes it possible to define the position of the workpiece 4 on the abutment surface 5a, further improving workability. Further, the contact surface 5a of the main body block 5 may be set to have an inclination of 45 degrees with respect to the mounting groove 2, for example. Of course, the scope of this invention is not limited to the above embodiments. For example, only one of the first engaging portion 6 and the second engaging portion 7 in the above embodiment may be configured to be movable in parallel in a direction toward and away from the other. Note that the number and shape thereof are not particularly limited, and are set according to the shape of the mounting groove 2 so that the main body block 5 can be efficiently mounted in the mounting groove 2. Further, the mounting jig 9 may be directly attached to the main body block 5 in advance. This will make it more user-friendly.

[Brief explanation of the drawing]

Fig. 1 is a plan view of one embodiment of this invention, Fig. 2 is a sectional view taken along the - line of Fig. 1, and Fig. 3 is a plan view of an embodiment of the invention.
FIG. 3 is a sectional view taken along the - line in the figure. 1...Positioning device, 2...Mounting groove, 3...
Table, 4...workpiece, 5...main block,
5a... Positioning contact surface, 5b... Lower surface of main body block, 6, 7... Engaging portion.

Claims (1)

[Scope of utility model registration request] A device for positioning a workpiece on a table having a plurality of parallel mounting grooves, the main body block being stably placed on the table and having a positioning surface provided on the side surface; At least two engaging portions are provided on the lower surface of the main body block that fit into the mounting groove without play and are non-rotatable relative to the main body block around an axis perpendicular to the table surface, and the above-mentioned engaging portion A workpiece positioning device characterized in that at least one of the engaging portions is configured to be movable in parallel in a direction toward and away from the other engaging portions.