JPS6347580B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for cutting the end of a workpiece into an arc shape, such as a ratchet blade attached to a circular frame.

Generally, as shown in FIG. 2, an aluminum alloy louver blade 2 extruded to the same cross-sectional shape is attached to a circular aluminum alloy extruded frame 1 as shown in FIG. Measure in advance the length dimensions l1, l2, l3, l4 of each louver vane 2 at each mounting position, and cut into extruded shapes for the louver vane having respective length dimensions l1, l2, l3, l4. After that, the end of each louver blade must be cut into an arc shape as shown in Figures 3 and 4, depending on the mounting position. The end of the extruded material for the louver is roughly cut diagonally, and then it is manually shaved using a file to match the actual curved state, which is extremely inefficient and requires a set of louver blades. Not only did it take a great deal of time and effort to align them, but the finished appearance was also poor, and it was extremely difficult to create a glazing blade that would fit snugly into the arc-shaped frame.

Therefore, the present invention solves the problems associated with making the louver blades, and provides an arcuate cutting device that can reliably and quickly process the louver blades that are tightly joined to the arcuate frame. In addition, with the aim of making the structure simple, making the entire device as compact as possible, and making it easy to handle and operate, we have devised unique ingenuity in its structure. It is something.

That is, the device of the present invention engages and places a base plate movably in a direction orthogonal to the direction of straight movement of the base plate on a base plate that travels straight in a fixed direction below a cutting blade in a fixed position. A workpiece holder whose angle can be freely changed with respect to the straight direction of the substrate is provided on the base plate, and one end of an arm extending in the direction of movement is pivotally attached to the base plate, and this arm can be moved at any position in the longitudinal direction. The arm is pivotally supported on a processing machine equipped with the cutting blade, and the arm is rotatable in the horizontal direction around the pivot part, and the linear motion of the substrate and the horizontal rotational motion of the arm are combined. The workpiece is moved toward the cutting blade while rotating the workpiece installed on the holder in the same direction as the rotational direction of the arm via a base plate that moves in the same direction as the rotational direction. It is characterized by the fact that

The present invention will be described below based on an illustrated embodiment, and the processing machine according to the embodiment utilizes a commonly used milling machine. As shown in FIG. 5, the milling machine here is a vertical milling machine equipped with a vertical cutting blade 3 in a fixed position, that is, an end mill, and a substrate 4 provided at a position below this cutting blade 3. , which moves straight in the left and right direction in FIG.
This is done by a worm gear operated by a worm gear.

A guide body 7 having a groove 6 perpendicular to the direction in which the substrate 4 moves in a straight line is attached to the substrate 4, and a protrusion 9 provided on the back surface of the base plate 8 is fitted into the groove 6. This allows the base plate 8 to move at right angles to the direction in which the substrate 4 moves straight.

As shown in FIGS. 6 and 7, a rotating arm 10 extending in the direction of movement of the base plate 8 is connected to the base plate 8 via a shaft 11. Special measures have been taken to fix the machine at an arbitrary position and to use this fixed position as the center of rotation.

That is, a support 12 extending parallel to the arm 10 at the bottom of the arm 10 is fixed to a milling machine A, which is a processing machine, and a guide groove 1 is formed on the upper surface of the support 12.
3, and a fixing device B is attached to this guide groove 13, and this fixing device B is, as shown in FIG.
is slidably inserted into the guide groove 13, and the sleeve tube 16 is fitted onto the shaft body 14, so that the sleeve tube 16 and the shaft body 14 are inserted into the elongated hole 17 formed in the longitudinal direction of the arm 10. By inserting the nut 19 into the sleeve and tightening the nut 19 screwed onto the upper end of the shaft protruding from the sleeve 16, the lower end piece 18 of the sleeve 16 and the shaft 1 are tightened.
The guide groove side walls 20, 20 are clamped and held by the lower end flange piece 15 of the arm 10, and the ring body 21 inserted into the elongated hole 17 of the arm 10 is connected to the sleeve 16 via a bearing 22. At the same time, the pressing ring 23 is fitted onto the ring body 21 and the nut body 24 screwed onto the upper part of the ring body protruding from the upper part of the pressing ring 23 is tightened. The arm 10 is clamped and held by the lower end receiving portion 25 of the arm 10, and by loosening the nut 19 and the nut body 24, the fixing device B is attached to the elongated hole 17 of the arm 10 and the guide groove 13. The nut 19 and the nut body 24 can move freely along the
By tightening the arm 10, it can be fixed at any position, and with this device B, the dimension between the shaft 11 and the shaft body 14 can be changed as appropriate, and this dimension R1
The radius of rotation is

When the substrate 4 is moved straight in the direction of arrow A in FIG. 7, the base plate 8 also tends to move in the same direction. However, since a predetermined location in the longitudinal direction of the arm 10, which is pivoted to the base plate 8, is pivoted to the milling machine A, the base plate 8 cannot be moved straight by the arm 10 as it is. on the other hand,
As the substrate 4 moves in a straight line, the arm 10 that is connected to the base plate 8 that is mounted and engaged with the substrate 4 rotates as shown by the arrow C in the figure around the fixing device B that is the pivot portion of the arm 10. do. As a result, the base plate 8 moves as shown in C while maintaining its original posture.

Therefore, the holder 2 provided separately on the base plate 8
The workpiece 2, which is an extruded material for a louver blade placed on the base plate 6, is moved in the same manner as the base plate 8 while maintaining the initially set posture with respect to the straight movement direction arrow A of the base plate 4. It will rotate in the same trajectory as arrow C.

That is, in FIG. 7, one end a of the workpiece 2
is the distance R1 between the shaft 11 and the shaft body 14 as the radius,
It rotates in the same direction as the arm 10 around a point P that is parallel to the line segment passing through the shaft 11 and the shaft body 14 and located on a straight line passing through the one end a,
The above-mentioned point a will draw an arc-shaped locus d as shown in FIG. Therefore, if the cutting blade is placed on this trajectory N, the workpiece 2 will be cut into an arc shape, but since the cutting blade N is fixed, the above trajectory of the workpiece 2 will be cut. On the other hand, the cut portion becomes a circular arc as shown in FIGS. 9 and 10.

The arc E at this time is symmetrical with respect to the rotation center point P with respect to one end a, as shown in FIG. This corresponds to a circular arc drawn with the same radius R1 centered at position P1, and this circular arc is equal to the inner radius R of the circular frame 1 shown in FIG. The radius of movement R1 is equal to the inner radius R of the circular frame 1.

In other words, in order to create a louver blade for use in the circular frame 1 with radius R, the rotation radius of the arm should match the radius R of the circular frame. For example, the fixing device B can be moved accordingly and fixed so as to obtain the required radius.

If the holding body 26 is rotated based on the rotation radius R1 of the arm 10 set in this way,
As shown in FIG. 11, the second upper and lower louver blades 2b and 2g can be similarly cut into an arc shape that matches the circular frame 1, and the other louver blades 2c, 2d, 2
The same is true for e and 2f.

However, it is not enough to simply cut the workpiece 2 for the louver blade into a circular arc corresponding to the radius R of the circular frame 1. As shown in FIG. 1, each of the louver blades 2a, 2b...2h is arranged in parallel at a predetermined interval, and the mounting position relative to the circular frame 1 is automatically determined, and the mounting position is determined according to each mounting position. Since the arcuate states are different, each louver blade 2a, 2b, . . . , 2h must be cut according to its shape.

The mounting position of the louver blades 2a, 2b...2h is determined by the angle a formed by the line OM connecting the tip of the lower edge of each louver blade 2a, 2b...2h and the center O of the circular frame 1, and the line MN of the lower edge. , β...

Applying this to Fig. 10, the straight line connecting one end a of the workpiece 2 and the center point P1 to the circular arc corresponds to the straight line OM in Fig. 1, and the one end a of the workpiece 2 and The straight line connecting the other end b is the straight line MN in Figure 1.
corresponds to Therefore, ∠baP1 based on aP1
The installation position can be determined by moving the workpiece 2 so that ∠OMN coincides with ∠OMN.

Such an angle setting can be carried out using a commercially available angle indexing device, and the indexing device C is interposed and fixed between the base plate 8 and the holder 26, and thereby The angle can be changed arbitrarily.

By the way, the shutter blades 2a, 2b...2h are the second
As shown in the figure, since it is generally installed in an inclined state, it is preferable that the workpiece 2 for each louver blade is cut into an arc shape taking into consideration the inclined state. is the 12th
As shown in the figure and FIG. 13, a holder D is used to hold the workpiece 2 in an inclined state.

This holder D is made up of a supporting body 27 and a clamping body 28 which are pivoted together, with a gap 29 between them for clamping the workpiece, and is detachably mounted on the holder 26. At the same time, by tightening the pressing body 31 inserted into the screw shaft 30 erected on the holding body 26 from above, the pressing body 31 and the holding body 26 are tightened from above.
It is clamped and fixed between the two.

In order to determine the position where the tip of the workpiece 2 contacts the cutting blade 3, it is preferable to provide a stopper device E near the cutting blade 3, as shown in FIG.

In addition, the workpiece for the louver blade is shown in Figure 14 and Figure 1.
Since it has various cross-sectional shapes as shown in FIG. 5, the void 29 of the holder D is formed according to each shape. Furthermore, one side of the holder D is formed as a curved surface so as not to come into contact with the cutting blade 3.

By the way, the shapes of the extruded shapes of the uppermost louver blade 2a and the lowermost louver blade 2h in FIG. 1 are not vertically symmetrical, so even though they cut the same arc, The state in which the objects are installed on the holding body 26 differs, and the shape of the cavity 29 of the holding jig D also changes accordingly.

In addition, in order to make the device of the present invention more practical and compact, both ends of one workpiece 2 are not cut at once in one operation, but each end is processed separately. It is preferable. This is because the radius of the circular frame 1 may become long and large, and in this case, if it were to be processed all at once, the apparatus itself would become large. Therefore, it is necessary to prepare a dedicated holder for each end. This is because each of the louver blades 2a, 2b...2h is symmetrical across the line X-X in FIG. This is because they are different.

To summarize the above, the X-X line and the y-
It is sufficient to prepare four holders according to the locations divided into four equal parts by the y-line.

Although the device of the present invention has the above-mentioned characteristics, it has a simple structure, can be manufactured in a size that does not pose any practical problem, is easy to handle, and can be used in various ways. It is possible to accurately and quickly provide a louver blade having an arcuate end corresponding to a circular frame with a radius,
It has a remarkable effect compared to conventional manual labor, and makes a great contribution to streamlining factory production.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a circular louver window, FIG. 2 is a sectional view thereof, FIGS. 3 and 4 are perspective views of the louver blade, and FIG. 5 is a front view showing an embodiment of the device of the present invention. , FIG. 6 is a perspective view of the main part, FIG. 7 is a plan view, FIG. 8 is a sectional view of the fixing device, FIG. 9 is a plan view showing an embodiment of the device of the present invention, and FIGS. Fig. 11 is a diagram of the cutting process of the workpiece, Fig. 12 is a perspective view showing an embodiment of the holder, Fig. 13 is a plan view, and Figs. 14 and 15 show the shape of the workpiece. It is a front view. Code, A... Milling machine which is a processing machine, B...
Fixing device, 2... Workpiece, 3... Cutting blade, 4...
...Substrate, 8...Bedplate, 10...Arm, 26...
holding body.

Claims (1)

[Claims] 1. A base plate is engaged with and placed on a base plate that moves straight in a fixed direction below a cutting blade in a fixed position so as to be movable in a direction perpendicular to the straight direction of the base plate. A workpiece holder whose angle can be freely changed with respect to the straight direction of the substrate is provided on the base plate, and one end of an arm extending in the direction of movement is pivotally attached to the base plate, and this arm can be moved at any position in the longitudinal direction. The arm is pivotally supported on a processing machine equipped with the cutting blade, and the arm is rotatable in the horizontal direction around the pivot part, and the linear motion of the substrate and the horizontal rotational motion of the arm are combined. The workpiece is moved toward the cutting blade while rotating the workpiece installed on the holder in the same direction as the rotational direction of the arm via a base plate that moves in the same direction as the rotational direction. A device for cutting an arc-shaped end of a workpiece. 2. The arc-shaped cutting device for the end of a workpiece according to claim 1, wherein the shaft support portion, which is the center of rotation of the arm, can be changed as appropriate in the longitudinal direction of the arm.