JPH05337716A - Chamfering device - Google Patents

Abstract

PURPOSE:To make it possible to chamfer a plate work, having a noncircular curved outline, automatically by means of a simple structural device. CONSTITUTION:In a device which chamfers a plate work 5 with a noncircular curved outline, it is provided with a work holding shaft 4 holding the plate work 5 as making it rotate at low speed, a chamfering tool 15 equipped with a conical surfacing working surface 15a for chamfering in contact with an end edge 5a of the work 5, and a tool driving shaft 14, having a shaft center in parallel with the work holding shaft 4, holding the chamfering tool 15 and driving this tool 15 at high speed. Also it is provided with a positioning member 33 being supported by the tool driving shaft 14 and installed in proximity to a peripheral surface 5b of the work 5, and an energizing means energizing the work holding shaft 4 and the tool driving shaft 14 so as to make them cane close to each other as its constitution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chamfering device for chamfering a plate-shaped workpiece having a non-circular curved outer shape such as a heart cam.

[0002]

2. Description of the Related Art A heart cam used in a spinning machine or the like is formed by manually chamfering a cam material formed into a predetermined shape by casting or the like and then quenching.

[0003]

A plate-like workpiece having a non-circular curved outer shape such as a heart cam has a complicated outer shape, and thus it is difficult to automatically perform chamfering. However, if the chamfering work is omitted, good quenching cannot be performed, and thus the chamfering work has conventionally been performed manually, which causes a cost increase.

In view of the above, the present invention is capable of automatically chamfering a plate-shaped workpiece having a non-circular curved outer shape with a device having a simple structure.

[0005]

SUMMARY OF THE INVENTION The present invention is a device for chamfering a plate-shaped workpiece having a non-circular curved outer shape, and a workpiece-holding shaft for holding the plate-shaped workpiece while rotating at a low speed. , A machining tool that has a conical machining surface that chamfers by contacting the edge of a plate-shaped workpiece, and a machining tool that holds the machining tool with an axis parallel to the workpiece holding axis The tool driving shaft that drives the tool to rotate at high speed, the positioning member that is supported by the tool driving shaft and is disposed close to the peripheral surface of the plate-shaped workpiece, and the workpiece holding shaft and the tool driving shaft are brought close to each other. And an urging means for urging as described above.

[0006]

In the present invention, the plate-shaped workpiece is set on the workpiece-holding shaft and is rotated at a low speed while being set at the tool drive shaft to rotate at a high speed. Is brought into contact with the edge of the plate-like workpiece to be chamfered. Since the tool drive shaft is biased by the biasing means so as to approach the workpiece holding shaft, the machining surface of the machining tool is always in pressure contact with the edge of the plate-shaped workpiece for chamfering work. Since the outer shape of the plate-shaped work piece is a non-circular curved outer shape, the distance between the shaft center of the work-piece-holding shaft and the chamfering location changes with the rotation of the plate-like work piece Following the change, the distance between the tool drive shaft and the workpiece holding shaft changes, which enables smooth chamfering work.

Further, as the chamfering work progresses, the tool driving shaft approaches the plate-shaped workpiece by the amount of the chamfering, and finally the positioning member supported by the tool driving shaft contacts the peripheral surface of the workpiece. To do. Due to this contact, further deep chamfering is impossible, and chamfering work is performed with a certain cutting allowance.

[0008]

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

FIG. 3 schematically shows an example of the chamfering device of the present invention. 1 is a machine base, 2 is an upper support base, 3 is a bearing fixed on the upper support base 2, and 4 is a bearing 3. A workpiece holding shaft 5 rotatably supported is a workpiece held by the workpiece holding shaft 4. Reference numeral 6 denotes a work piece drive motor, the rotation of which is transmitted to the work piece holding shaft 4 by a transmission means composed of sprockets 7a, 7b, 7c, 7d, chains 8a, 8b, etc. The work piece 5 detachably held on the workpiece is rotated at a low speed.

The plate-like work piece 5 having a non-circular curved outer shape such as a heart cam is concretely fixed to the work piece holding shaft 4 by a nut / lock nut 9 as shown in FIG. It is attached. If the plate-shaped workpiece 5 is provided with a key groove, it may be used as a key-attaching structure.

In FIG. 3, 10 is an upper frame and 11
Is a guide rail base fixed to the upper frame 10, 12 is a slide base guided by the guide rail base 11 to move back and forth,
13 is attached to the slide base 12 and is forward (right side in FIG. 3)
A tool support rod projecting to the front, a tool drive shaft 14 rotatably supported at the front end of the tool support rod 13, and a tool drive shaft 1
It is an angular cutter (processing tool) held by No. 4.

Reference numeral 16 denotes a tool driving motor provided on the slide base 12. This rotation is transmitted to the tool driving shaft 14 by a transmission means composed of a sprocket 17a, a chain 18 and a sprocket 17b, and then to the tool driving shaft 14. The held angular cutter 15 is rotated at high speed.

The slide base 12 is urged forward by a weight 20 attached via a chain 19, and the angular cutter 15 has an edge 5a of the workpiece 5.
(See FIG. 1). Reference numeral 21 is a stopper for fixing one end of the chain 19 to the slide base 12, and 22 is a guide sprocket for the chain 19. In addition, the slide base 12 is attached to the lock lever 23 and the chain 2
It is connected via 4 and is locked in the retracted position. That is, the lock lever 23, the base end of which is pivotally supported by the pivot 25 on the upper frame 10, is provided with the engaging element 27 that is hooked by the hooking member 26 at the lower pivot position (the virtual body in FIG. 3). , The weight 20 is configured to lock the forward sliding movement. 28 is a stopper for fixing one end of the chain 24 to the slide base 12, 29 is a guide sprocket for the chain 24, 30
Is a fastener for fixing the other end of the chain 24 to the lock lever 23. As described above, while the slide base 12 is locked at the retracted position, the work 5 can be attached to and removed from the work holding shaft 4.

As shown in FIGS. 1 and 2, the tool support rod 13 uses the bolts 31 and 31 to slide the slide base 12.
It is fixed to. Further, the front end portion of the tool support rod 13 is formed in a bifurcated shape, and the bearing tube 32 is attached thereto. The tool drive shaft 14 penetrates through the bearing tube 32,
It is rotatably supported. An annular positioning member 33 is rotatably fitted on the bearing sleeve 32. Bearing tube 3
On both sides of 2, a pair of left and right angular cutters 15, 15
Using the keys 34a, 34b to disable rotation of the tool drive shaft 1
It is attached to 4. The sprocket 17b
Also, with the angular cutter 15, 15, etc., the nut 35
Are fastened together with the tool drive shaft 14.

FIG. 1 shows the positional relationship between the pair of right and left angular cutters 15, 15, the positioning member 33 and the workpiece 5 immediately after the start of chamfering. Both angular cutters 1
Both the conical surface-shaped machining surfaces 15a and 15a of 5 and 15 face inward, and are in contact with both end edges 5a and 5a of the workpiece 5. The center lines of the annular positioning member 33 and the workpiece 5 are aligned with each other, and the distance C between the positioning member 33 and the peripheral surface 5b of the workpiece 5 is set to a predetermined position. This interval C decreases as the chamfering work progresses, and finally becomes zero, making further chamfering work impossible,
Keep the chamfer amount constant. Therefore, the initial setting amount of the interval C is automatically determined when the chamfering amount is determined.

The annular positioning member 33 is replaceable and has an outer diameter corresponding to the type of the workpiece 5 and the chamfering amount. Also, a pair of left and right angular cutters 1
It is also possible to deal with the case where the type of the workpiece 5 or the chamfering amount is changed by changing the interval H between 5, 15.

The present invention can be constructed in various modes other than those shown in the above embodiments. For example, in addition to the angular cutter, a grinder having a conical machining surface can be used as the machining tool 15, and when a pair of left and right machining tools 15, 15 is provided as in the above embodiment (in this case, Is capable of chamfering both edges of the work piece at the same time, and thus the work efficiency is not limited.)
May be provided. In the above embodiment, the tool drive shaft 14 is the movable shaft and the workpiece holding shaft 4 is the stationary shaft. However, this relationship is reversed so that the workpiece holding shaft 4 side faces the tool driving shaft 14 side. The structure may be biased.

[0018]

According to the present invention, it is possible to automatically chamfer a plate-shaped workpiece having a non-circular curved shape by a device having a simple structure.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view of an essential part of an embodiment of the present invention.

FIG. 2 is a partially cut front view of a main part of the embodiment of the present invention.

FIG. 3 is an overall schematic front view of an embodiment of the present invention.

[Explanation of symbols]

 4 Workpiece Holding Shaft 5 Plate Workpiece 5a Edge 5b Circumferential Surface 12 Slide Stand 14 Tool Drive Shaft 15 Machining Tool 15a Machining Surface 20 Weight (Biasing Means) 33 Positioning Member

Claims (3)

[Claims] 1. A device for performing chamfering of a plate-shaped workpiece having a non-circular curved outer shape, a workpiece-holding shaft for holding a plate-shaped workpiece while rotating at a low speed, and an end of the plate-shaped workpiece. A machining tool that has a conical machining surface that chamfers by contacting the edge, and a tool drive shaft that has a shaft center parallel to the workpiece holding axis and that holds the machining tool and drives the machining tool to rotate at high speed. When,
A positioning member supported by the tool drive shaft and arranged in proximity to the peripheral surface of the plate-shaped workpiece; and a biasing means for biasing the workpiece holding shaft and the tool drive shaft so as to approach each other. A chamfering device characterized by being provided. 2. A pair of left and right machining tools for simultaneously chamfering both edges of a workpiece and an annular positioning member rotatably arranged at an intermediate position thereof are supported by a tool driving shaft. Chamfering device. 3. A biasing means for biasing the tool holding shaft toward the workpiece holding shaft as a structure in which the tool holding shaft is supported by a slide base and the slide base is slid by a weight. The chamfering device according to claim 1 or 2.