JP2007044855A - Automatic chamfering device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic chamfering device capable of easily adjusting inclination of a cutting member required in chamfering a spiral bevel type gear by devising it to bring the cutting member of a cutting tool along an edge of a work while supporting the cutting tool free to oscillate. <P>SOLUTION: This chamfering device is furnished with the cutting tool 4 to cut the work by rotating the cutting member 3 provided on a tool main body 2, a holder 5 to support the cutting tool 4 free to oscillate, an energizing means to energize the cutting member 3 of the cutting tool 4 toward a part to be cut and a device pedestal 6 to support the holder 5 and also furnished with following (a) to (c) requirements. (a) The holder 5 is mounted on the device pedestal 6 free to tilt around one axis X. (b) The cutting tool 4 is supported free to oscillate around an axis Z making a right angle with an extention Y of the axis X of the holder 5. (c) A posture of the cutting tool 4 is set so that the extention Y of the holder 5 and the cutting member 3 intersect with each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an automatic chamfering apparatus for chamfering (or deburring) by cutting an end of a workpiece such as a machine part or a rubber product.

A cutting tool for cutting a workpiece by rotating a rod-shaped cutting member provided at the tip of the tool, a holder for swingably supporting the cutting tool, and a bias for biasing the cutting member of the cutting tool toward the workpiece For example, Patent Document 1 discloses an automatic chamfering apparatus including means and an apparatus base that supports the holder.
Utility Model Registration No. 2568912

The conventional chamfering device can be chamfered without problems because the cutting member and the edge of the tooth 100 intersect at one point with respect to the bevel gear G1 as shown in FIG.
However, for example, in the bevel bevel gear G2 as shown in FIG. 5, the tooth tip 101 and the tooth root 102 of the tooth 100 simultaneously pass through the cutting region of the cutting member 3 as shown in FIG. There arises a problem that any one of the elements 102 cannot be chamfered.
In order to clear such a problem, as shown in FIG. 6C, the cutting member 3 may be appropriately tilted in accordance with the shape of the tooth 100 so that the cutting member 3 always intersects the edge of the tooth 100 at one point. However, in the conventional chamfering apparatus, there is a problem that adjustment for inclining the cutting member 3 is not easy and workability is poor.

A cutting tool for cutting a workpiece by rotating a rod-shaped cutting member provided at a tip of a tool main body, a holder for swingably supporting the cutting tool, and a cutting member for the cutting tool. Provided is an automatic chamfering device that includes an urging unit that urges a workpiece to be cut and a device base that supports the holder, and further satisfies the following requirements (a) to (c).
(A) The holder is attached so as to be tiltable about one axis X with respect to the apparatus base.
(B) The cutting tool is supported so as to be swingable about an axis Z that is perpendicular to the extension line Y of the axis X of the holder.
(C) The posture of the cutting tool is set so that the extension line Y of the holder intersects the cutting member.

According to a second aspect of the present invention, there is provided a cutting tool for cutting a workpiece by rotating a rod-shaped cutting member provided at a tip of a tool main body, a holder for swingably supporting the cutting tool, An automatic chamfering apparatus comprising an urging means for urging a cutting member toward a workpiece to be cut and an apparatus base for supporting the holder, and further satisfying the following requirements (d) to (f): provide.
(D) The holder is composed of a vertical substrate and a horizontal arm, and is attached so as to be tiltable about the axis X of the axis by connecting the vertical substrate to the apparatus base with one axis.
(E) The cutting tool is supported in a swingable manner about a horizontal axis Z that is perpendicular to an extension line Y of the axis X of the shaft with respect to the horizontal arm of the holder.
(F) The posture of the cutting tool is set so that the extension line of the holder intersects with the cutting member.

  According to a third aspect of the present invention, there is provided the automatic chamfering device according to the first or second aspect, wherein the posture of the cutting tool relative to the holder can be changed around the axis Z.

  The concept of “cutting” in the present invention includes the concept of “grinding”.

  In the automatic chamfering apparatus of the present invention, since the cutting member is set on the extension line Y of the axis X that is the center of tilting of the holder, the cutting tool tilts about the cutting member when the holder is tilted. Therefore, if the workpiece and the cutting member are aligned before the cutting tool is tilted, and then the holder is tilted and the cutting tool is tilted, the cutting member becomes the center of tilting, and the previously aligned point does not go wrong. Therefore, the adjustment which inclines the cutting member according to the shape of the workpiece as shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. 1 is a perspective view of the automatic chamfering device, FIG. 2 is a front view, FIG. 3 is a side view, and FIG. 4 is a front view of a main part showing a use state.

  As shown in FIG. 1, the automatic chamfering apparatus 1 rotates a rod-shaped cutting member 3 provided at the tip of a tool main body 2 to cut a workpiece W (see FIG. 4), and the cutting tool 4. , A holder 5 that supports the holder 5, a biasing means (not shown) that biases the cutting member 3 of the cutting tool 4 toward the part to be cut, and an apparatus base that supports the holder 5. 6 and.

  The apparatus base 6 includes a horizontal substrate 7, a bottom plate 8, a vertical plate 9, and a top plate 10 joined in a U-shape in front view and attached on the substrate 7, and a bottom plate of the fixed frame 11. 8, a rotatable feed screw 12 passed between the top plate 10 and the top plate 10, a handle 13 for rotating the feed screw 12 provided on the top plate 10, and the vertical plate 9 slidably attached to the vertical plate 9 and the feed The elevating member 14 is engaged with the screw 12, and the tightening screw member 15 is provided at the back of the elevating member 14 and fixes the elevating member 14 to an arbitrary position on the vertical plate 9.

  In the holder 5, the vertical substrate 16 and the horizontal arm 17 are joined in a substantially inverted L shape, and the lower end of the vertical substrate 16 is coupled to the front surface of the lifting member 14 of the apparatus base 6 by a single shaft 18. The shaft 18 is attached so as to be tiltable about the axis X. A lock screw 20 with a handle 19 is attached to the vertical substrate 16 as a fixing means for fixing the posture of the holder 5. Further, bearings 21 and 21 for pivotally supporting the cutting tool 4 are provided at the tip of the holder 5, and a detachable set screw 23 for locking a wheel 22 to be described later is attached to one bearing 21. ing.

  The cutting tool 4 is formed by projecting a rotary shaft 18 at the tip of an elongated cylindrical tool main body 2 and fixing a round bar-shaped cutting member 3 to the rotary shaft 18, and rotating the cutting member 3 at a high speed. It is a well-known thing to cut. A square block-shaped piece member 24 is fixedly attached to the middle of the body of the tool main body 2 of the cutting tool 4.

  Thus, the cutting tool 4 is swingably attached to the holder 5 by projecting a swing shaft 25 on both sides of the piece member 24 and attaching the swing shaft 25 to the bearing 21 of the holder 5. The swing shaft 25 is set such that its axis Z is perpendicular to the extension line Y of the axis X of the holder 5, and the wheel 22 is rotatable at one end of the swing shaft 25. Attached to the state. Although not shown, a spiral spring as an urging means is built in the wheel 22, the center of the vortex is attached to the swing shaft 25, and the outer end of the vortex is attached to the inner wall of the wheel 22. Has been. Therefore, the wheel 22 and the swing shaft 25 are connected via a spiral spring, and when the wheel 22 is free to rotate, when the wheel 22 is rotated, the spiral spring and the swing shaft 25 rotate integrally. On the other hand, when the rocking shaft 25 is rotated counterclockwise in FIG. 2 while the wheel 22 is locked to the bearing 21 with the set screw 23, the spiral spring in between is elastically deformed and rocked by its restoring force. The shaft 25 is pushed back in the reverse direction (clockwise in FIG. 2). As will be described later, the restoring force of the spiral spring is a biasing force that biases the cutting member 3 toward the part to be cut of the workpiece W.

  As shown in the figure, the wheel 22 is locked to the bearing 21 by a set screw 23, and in this state, the cutting tool 4 stands up almost vertically with the cutting member 3 facing straight down. When the cutting tool 4 is in this posture, the cutting member 3 intersects the extension line Y of the axis X of the shaft 18 of the holder 5.

  Next, the usage method of the automatic chamfering apparatus 1 of this invention is demonstrated. First, the cutting tool 4 is in the vertical posture shown in FIG. 1, and the cutting member 3 is in a position where it intersects the extension line Y of the axis X of the holder 5. On the other hand, the holder 5 is in a vertical state in which the vertical substrate 16 is straight as shown by the solid line in FIG. Further, the workpiece W to be chamfered is a beveled bevel gear as shown in FIG. 5, and is supported by an appropriate rotating chuck (not shown), with the central axis 26 shown in FIG. 4 as the center. Can rotate at low speed.

  First, in order to adjust the position of the cutting member 3 to the height of the workpiece W, the handle 13 on the top plate 10 is turned to raise and lower the elevating member 14, the holder 5, and the cutting tool 4. Next, the entire automatic chamfering apparatus 1 is moved to the workpiece W side, or the workpiece W is moved to the automatic chamfering apparatus 1 side so that the cutting member 3 and the workpiece W are brought into contact with each other, and the further movement is deepened from there. The cutting tool 4 is slightly tilted counterclockwise as shown by the solid line in FIG. Then, since the rocking shaft 25 is rotated while the wheel 22 is stopped, a restoring force acts on the spiral spring in the wheel 22 as described above, and the cutting member 3 of the cutting tool 4 is moved by the force. It is urged toward W to be cut.

  However, the relationship between the cutting member 3 and the workpiece W at this stage is that the tooth 100 of the workpiece W is inclined with respect to the vertical cutting member 3 as shown in FIG. Since it intersects at two points, it is in an inconvenient state for chamfering. Therefore, the lock screw 20 for the holder 5 is loosened, and the holder 5 is tilted about the shaft 18 as shown by a two-dot chain line in FIG. Then, the cutting tool 4 tilts together with the holder 5. Since the center of inclination of the cutting tool 4 is the axis 18 of the holder 5, the cutting member 3 that intersects the extension line Y of the axis X of the axis 18 becomes the center of inclination. Accordingly, the cutting member 3 is tilted as shown in FIG. 6C while maintaining the contact portion with the workpiece W that has been previously aligned.

  The two-dot chain line in FIG. 3 shows a state in which the holder 5 is tilted clockwise for the sake of drawing, but of course, the holder 5 can also be tilted counterclockwise. And in order to incline the cutting member 3 from FIG.6 (b) to the state of FIG.6 (c) with the automatic chamfering apparatus 1 of embodiment, it is necessary to incline the holder 5 counterclockwise in FIG.

  Next, the cutting tool 4 is operated to rotate the cutting member 3 at a high speed while rotating the work W by slowly rotating the rotating chuck. Then, the cutting member 3 comes into contact with the edge of the work W with an appropriate force by the biasing force of the spiral spring of the wheel 22, and the cutting tool 4 swings along the shape of the edge of the work W while maintaining the state. Chamfering proceeds. Then, since the necessary chamfering is completed when the workpiece W makes one round in this state, the cutting tool 4 is first stopped, the rotation of the rotary chuck is stopped, and the workpiece W is removed.

  Although not shown, a cylinder for controlling the tilt of the cutting tool 4 is installed on the horizontal arm 17 of the holder 5, and the cutting tool 4 is further tilted counterclockwise from the solid line state of FIG. 4 by extending the rod of the cylinder. It may be possible to make it. By doing so, the work W and the cutting member 3 are rotated separately and then contact is started, or after the chamfering is finished, the work W and the cutting member 3 are separated and then the rotation is stopped. Is possible. Of course, the cylinder rod stands by at a position that does not affect the chamfering operation of the cutting tool 4 during chamfering.

  By the way, the automatic chamfering apparatus 1 of the present invention can be used by changing the angle of the cutting tool 4 arbitrarily as shown in FIG. In this case, the set screw 23 of the bearing 21 is loosened to unlock the wheel 22, the wheel 22 is rotated to an arbitrary angle, and the wheel 22 is stopped again with the set screw 23. When the wheel 22 is rotated, the rocking shaft 25 is also rotated via the spiral spring, and the cutting tool 4 is tilted together with the piece member 24. Even in such a state, the relative relationship among the cutting tool 4, the swing shaft 25, the spiral spring, and the wheel 22 does not change, so that the spiral spring functions as an urging means for the cutting tool 4. The holes 27, 27,... Of equal pitch provided on the peripheral surface of the wheel 22 are for engaging the tip of the set screw 23, and have a function of ensuring the fixing of the wheel 22.

  As mentioned above, although embodiment of this invention was described, of course, this invention is not limited to the said embodiment. For example, a spiral spring is used as the biasing means in the embodiment, but a spring (elastic body) other than the spiral spring may be used, and the external force of the elastic body is not used, and the weight of the cutting tool 4 is used as the biasing means. May be.

It is a perspective view of an automatic chamfering apparatus. It is a front view. It is a side view. It is a front view of the principal part which shows a use condition. It is a perspective view which shows a workpiece | work and a cutting member. (A)-(c) is a schematic front view which shows the relationship between a workpiece | work and a cutting member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Automatic chamfering device 2 ... Tool main body 3 ... Cutting member 4 ... Cutting tool 5 ... Holder 6 ... Device base 16 ... Vertical substrate 17 ... Horizontal arm 18 ... Axis W ... Workpiece X ... Axis line Y ... Extension line Z ... Axis line

Claims (3)

A cutting tool for cutting a workpiece by rotating a rod-shaped cutting member provided at the tip of the tool main body, a holder for swingably supporting the cutting tool, and a cutting member of the cutting tool directed toward a workpiece to be cut An automatic chamfering apparatus comprising an urging means for urging and an apparatus base for supporting the holder, and further satisfying the following requirements (a) to (c).
(A) The holder is attached so as to be tiltable about one axis X with respect to the apparatus base.
(B) The cutting tool is supported so as to be swingable about an axis Z that is perpendicular to the extension line Y of the axis X of the holder.
(C) The posture of the cutting tool is set so that the extension line Y of the holder intersects the cutting member. A cutting tool for cutting a workpiece by rotating a rod-shaped cutting member provided at the tip of the tool main body, a holder for swingably supporting the cutting tool, and a cutting member of the cutting tool directed toward a workpiece to be cut An automatic chamfering apparatus comprising an urging means for urging and an apparatus base for supporting the holder, and further satisfying the following requirements (d) to (f):
(D) The holder is composed of a vertical substrate and a horizontal arm, and is attached so as to be tiltable about the axis X of the axis by connecting the vertical substrate to the apparatus base with one axis.
(E) The cutting tool is supported in a swingable manner about a horizontal axis Z that is perpendicular to an extension line Y of the axis X of the shaft with respect to the horizontal arm of the holder.
(F) The posture of the cutting tool is set so that the extension line of the holder intersects with the cutting member.   The automatic chamfering device according to claim 1 or 2, wherein a posture of the cutting tool with respect to the holder can be changed around the axis Z.

Images