JP2008119799A - Chamfering device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chamfering device capable of rapidly performing chamfering. <P>SOLUTION: A device base 10 is provided with a work rotary base 11 for supporting and rotationally driving a workpiece W, and a column 16, and a tool support base 18 is movably mounted to the column 16. A machining head 26 for rotationally driving a machining tool 27 is mounted to a support shaft 21 pivotably mounted to the tool support base 18, a spring force of a tension coil spring 36 is applied to the machining tool 27 through an oscillating lever 34 mounted to the support shaft 21, and the workpiece W is energized by pressing force in the oscillating direction. The machining tool 27 performs chamfering on the workpiece W by the oscillating movement of the machining head 26 copying the portion E to be machined of the workpiece W. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a chamfering device for chamfering a peripheral surface of a rotating member such as an inner peripheral surface of a gear mounting hole.

  When finishing or deburring the outer peripheral surface or inner peripheral surface of a workpiece manufactured by casting or forging, the end is processed by a chamfering device. For example, after forging an external gear having a spline hole as a mounting hole to be fitted to the spline of the shaft, the inner peripheral surface of the boundary portion between the spline hole and the straight hole having a larger diameter is chamfered. Finished. The inner peripheral surface is a curved surface, and conventionally, a copying apparatus as described in Patent Document 1 is used to process a three-dimensional surface such as a curved surface.

The copying apparatus presses a stylus against a model having a contour surface corresponding to a workpiece part of the workpiece, and moves the machining tool connected to the stylus by tracing the stylus on the contour surface.
JP-A-10-249677

  The copying apparatus can process many types of workpieces by exchanging models, and has the advantage of versatility. However, the copying machine becomes complex and the workpiece type changes each time the workpiece type is changed. It is necessary to prepare and mount a model having a contour surface corresponding to the part to be processed, and there is a problem that the manufacturing cost of the copying apparatus increases and the processing cost also increases. Further, since the processing tool in the copying apparatus has a large inertial mass including the stylus, the moving speed of the processing tool cannot be increased, and there is a limit to increasing the processing speed.

  The objective of this invention is providing the chamfering apparatus which can perform a chamfering process rapidly.

  The chamfering apparatus of the present invention is provided on the apparatus base, supports a work and rotates and supports a work, and is provided on the apparatus base, and the tool support moves in a direction along the rotation center axis of the work. A column that is freely mounted and a support shaft that is swingably mounted on the tool support base around a swing center axis in a direction perpendicular to the rotation center axis, and is in contact with the peripheral surface of the workpiece Mounted between a machining head that rotationally drives the machining tool, a swing lever attached to the support shaft, and the tool support base, and swings the machining tool relative to the workpiece via the swing lever. And a spring member that urges a pressing force in the direction, and the machining tool performs machining following a work site of the workpiece by a swing movement locus centering on the support shaft.

  The chamfering apparatus according to the present invention includes tool positioning means for driving the machining head to a machining position where the machining tool contacts the workpiece and a standby position away from the workpiece via the swing lever. To do.

  The chamfering device of the present invention attaches the machining head to a tool support bracket fixed to the support shaft so as to be movable in the axial direction, and urges the machining head to have an axial spring force toward the workpiece. A spring member is provided on the tool support bracket.

  In the chamfering apparatus of the present invention, the machining head is an air grinder that rotationally drives the machining tool with compressed air.

  According to the present invention, since the processing head is swung by applying a spring force to the processing head provided with the processing tool at the tip via the swing lever, the processing tool is high at the part to be processed of the workpiece. It can be moved with tracking, and chamfering can be performed quickly. Thereby, chamfering processing efficiency can be improved.

  Since the pressing force against the processing site is applied to the processing tool by the spring force, the pressing force can be reliably applied with a simple structure, and the chamfering device can be manufactured without increasing the manufacturing cost. By simply pressing the processing tool against the peripheral surface such as the inner peripheral surface or the outer peripheral surface of the workpiece, the processing tool can be automatically moved to the locus of the part to be processed in accordance with the shape of the workpiece by rotating the workpiece.

  Since the workpiece is machined by the machining tool provided on the machining head that swings, the workpiece is rotated on the inner peripheral surface of the workpiece while rotating the workpiece by fitting the rotary shaft of the workpiece turntable to the inner surface of the workpiece. Chamfering can be performed.

  When an air grinder is used as a machining head that rotationally drives the machining tool, the machining head can be reduced in weight, and the machining head can be swung more quickly.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a front view of a chamfering apparatus according to an embodiment of the present invention, FIG. 2 is an enlarged front view showing a main part of FIG. 1, FIG. 3 is a right side view of FIG. 2 is a plan view of FIG. 2, and FIG. 5 is a side view in the direction of arrow 5 in FIG.

  As shown in FIG. 2, the workpiece W is an external gear, and a spline hole H1 is formed on the inner peripheral surface of the boss by forging or casting, and this is connected to the spline hole H1 at one end of the boss portion. A straight hole H2 having a diameter larger than that is formed. These holes H1 and H2 are attachment holes for attaching the gear to the shaft, and a curved surface as a step portion is formed on the inner peripheral surface at the boundary between the spline hole H1 and the straight hole H2. Each figure shows a state in which a chamfering device is used to finish this portion into an arcuate concave surface by using the inner peripheral surface of the boss portion as a processing portion E.

  This chamfering apparatus has an apparatus base 10 as shown in FIG. 1, and a work turntable 11 that supports and rotates the work W is provided on the upper surface of the apparatus base 10. 2 and 3, the work turntable 11 has a rotary shaft 12 that is driven to rotate about a rotation center axis S. The rotary shaft 12 is on the lower surface side of the apparatus base 10 as shown in FIG. The rotation of the electric motor 13 is transmitted to the rotary shaft 12 via the speed reducer 14. The workpiece W is fitted to the rotary shaft 12 and is attached to the rotary shaft 12, and a pin 15 that protrudes from the outer peripheral surface of the rotary shaft 12 and engages with the spline hole H1 of the workpiece W in the radial direction. Built in to move freely.

  On the apparatus base 10, a column 16 is erected in the vertical direction in the direction along the rotation center axis S adjacent to the work turntable 11, and the guide rail 17 attached to the column 16 has a guide rail 17. A tool support 18 is mounted so as to be able to reciprocate in the vertical direction along the central axis S. As shown in FIG. 1, a pneumatic cylinder 19 is attached to the column 16 to reciprocate the tool support base 18 in the vertical direction, and the tip of the piston rod 20 of the pneumatic cylinder 19 is fixed to the tool support base 18. Yes. The tool support 18 is reciprocated in the vertical direction between the lower limit position and the upper limit position by the pneumatic cylinder 19.

  The tool support 18 extends in the horizontal direction, and the tip of the tool support 18 reaches the upper part of the work turntable 11. As shown in FIGS. 3 and 4, a support shaft 21 is swingably mounted by a bearing 22 at the tip of the tool support base 18, and the swing center axis R of the support shaft 21 is shown in FIG. As shown, the rotation axis 12 is perpendicular to the rotation center axis S. As shown in FIGS. 3 and 4, a tool support bracket 23 is fixed to one end portion of the support shaft 21 so as to extend in a direction perpendicular to the swinging central axis R. A holder 25 is movably mounted on a guide rail 24 provided on the tool support bracket 23, and a machining head 26 is attached to the holder 25.

  The machining head 26 has a rod-like machining tool 27 having a cutting edge at the tip, and this machining tool 27 has a tool rotation center axis T as shown in FIG. 2 by compressed air supplied from an air supply hose 28. An air grinder is used as the processing head 26. However, as the machining head 26, a type in which the machining tool 27 is rotationally driven by an electric motor may be used.

  As shown in FIG. 5, a protrusion 29 is fixed to the holder 25, and forward and backward stopper bolts 30a and 30b are fixed to the tool support bracket 23 so as to sandwich the protrusion 29 from both sides in the axial direction. The machining head 26 is restricted in the movement limit position in the axial direction between the stopper bolts 30a and 30b. A spring in which a compression coil spring 32 as a spring member incorporated in a case 31 fixed to the tool support bracket 23 is fixed to the holder 25 in order to bias the processing head 26 in the direction toward the workpiece W. It abuts on the receiver 33. As this spring member, other spring members such as a tension coil spring may be used as long as the spring force in the direction toward the workpiece W is urged against the machining head 26.

  As shown in FIGS. 2 and 4, a swing lever 34 is attached to the support shaft 21 at its base end, and between the spring receiver 35 fixed to the tool support 18 and the swing lever 34. A tension coil spring 36 is attached. A spring force in the clockwise direction in FIG. 2 is urged to the support shaft 21 via the swing lever 34 by the spring force of the tension coil spring 36, and the machining head 26 is swung in the clockwise direction by this spring force. A rotational force is applied. When the machining head 26 swings and rotates, the tip of the machining tool 27 provided on the machining head 26 moves along an arc-shaped trajectory centered on the oscillation center axis R. The arc-shaped trajectory is the workpiece W. This corresponds to the arcuate surface of the work site E to be machined on the inner peripheral surface. As the spring member, other spring members such as a compression coil spring may be used as long as the spring force in the clockwise direction in FIG.

  In order to swing the machining head 26 between a position where the machining tool 27 comes into contact with the workpiece W and a standby position where the machining tool 27 is separated from the workpiece W, a guide rail 37 fixed to the tool support 18 as shown in FIG. A positioning box 38 is mounted so as to be movable in the vertical direction. As shown in FIG. 2, a roller 41 provided at the tip of the swing lever 34 enters a guide groove 39 formed in the positioning box 38. Yes. A piston rod 44 of a pneumatic cylinder 43 as a tool positioning means attached to the tool support 18 is brought into contact with the protrusion 42 attached to the positioning box 38, and the piston rod 44 of the pneumatic cylinder 43 projects and moves. As a result, the positioning box 38 is moved downward via the protrusion 42, and the machining head 26 is driven to the standby position via the swing lever 34. On the other hand, when the piston rod 44 of the pneumatic cylinder 43 is moved backward, the movement restriction of the positioning box 38 is released, and the machining head 26 is driven to rotate clockwise in FIG. 2 by the spring force of the tension coil spring 36. In FIG. 2, the angle θ indicates the swing angle of the machining head 26.

  The positioning box 38 for swinging the machining head 26 between the position where it contacts the workpiece W and the standby position away from the workpiece W is moved by the pneumatic cylinder 43. The tool positioning means may be configured by the driving means.

  The procedure for chamfering the workpiece to be machined by the chamfering device described above will be described. The distance of the column 16 from the workpiece turntable 11 is adjusted and moved according to the diameter of the workpiece W. After the position of the column 16 is set, the column 16 is fixed to the apparatus base 10 by the bolt 45 shown in FIG. By mounting the workpiece W on the rotating shaft 12 of the workpiece rotating table 11, the workpiece W is set on the workpiece rotating table 11, the pin 15 provided on the rotating shaft 12 engages with the spline hole H1 of the workpiece W, and the rotating shaft The rotation of 12 is transmitted to the workpiece W via the pin 15.

  In this way, with the workpiece W mounted on the rotary shaft 12, the pneumatic cylinder 19 is operated to move the tool support 18 downward to the lower limit position. When moving down, the processing head 26 is set to the standby position by the pneumatic cylinder 43 via the swing lever 34. In order to set the lower limit position of the tool support 18, an adjustment bolt 47 is attached to the bracket 46 fixed to the column 16, and the tool support 18 is lowered in advance corresponding to the workpiece W by the adjustment bolt 47. The limit position has been adjusted.

  FIG. 2 shows a state in which the tool head 18 approaches the workpiece W with the machining head 26 at the standby position. Under this state, the compressed air is supplied to the machining head 26 to rotate the machining tool 27, and the electric motor 13 rotates the rotary shaft 12 of the work turntable 11, and further swings by the pneumatic cylinder 43. When the restraint of the lever 34 is released, the machining head 26 swings by the spring force of the tension coil spring 36 and the machining tool 27 comes into contact with the workpiece E of the workpiece W.

  When the processing tool 27 comes into contact with the workpiece W, the processing tool 27 is caused by the spring force in the swing direction applied to the processing head 26 by the tension coil spring 36 and the spring force applied to the processing head 26 by the compression coil spring 32 in the axial direction. Is applied with a pressing force toward the workpiece W. When the workpiece W is rotated while rotating the machining tool 27 in this way, the machining tool 27 swings around the oscillation center axis R, so that the workpiece E of the workpiece W has an arcuate inner circumference. The surface is finished. At the time of this machining, simply by pressing the machining tool 27 against the machining site E on the inner peripheral surface of the workpiece W, the machining tool 27 is automatically placed on the locus of the machining site E following the machining site E by the rotation of the workpiece W. Can be moved.

  As shown in the figure, the machining head 26 that swings and moves even when the workpiece E formed on the inner peripheral surface of the workpiece W is processed or the rotary shaft 12 is fitted to the inner peripheral surface of the workpiece W. The part E to be machined can be machined by the machining tool 27 provided on the machining head 26 without interfering with W.

  As described above, in the above-described chamfering device, the chamfering process is performed by applying a spring force to the machining head 26 provided with the machining tool 27 at the tip end through the swing lever 34 and swinging the machining head 26. Therefore, the machining tool 27 can be worked by quickly following the work site E of the workpiece W. Since the pressing force in the swinging direction by the tension coil spring 36 and the pressing force in the axial direction by the compression coil spring 32 are applied from the processing tool 27 to the processing site E, the processing site E can be surely applied to the processing site E with a simple structure. On the other hand, a pressing force can be applied.

  It is also possible to machine the outer peripheral surface of the cylindrical member using the chamfering device shown in the figure. In this case, the distance between the column 16 and the work turntable 11 is adjusted so that the tip of the processing tool 27 is brought into contact with the outer peripheral surface of the work. Will be in contact. As described above, the chamfering apparatus can perform chamfering and finishing on the outer peripheral surface as well as the inner peripheral surface of the workpiece.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, although the workpiece W shown in the figure is a gear, the workpiece W can be machined in any shape as long as it is a rotating member and the inner circumferential surface or outer circumferential surface thereof is machined with a rotary tool.

It is a front view of the chamfering device which is one embodiment of the present invention. It is an enlarged front view which shows the principal part of FIG. FIG. 3 is a right side view of FIG. 2. FIG. 3 is a plan view of FIG. 2. It is a side view in the direction of arrow 5 in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Apparatus base 11 Work rotation base 16 Column 18 Tool support stand 21 Support shaft 23 Tool support bracket 26 Processing head 27 Processing tool 32 Compression coil spring (spring member)
34 Oscillating lever 36 Tension coil spring (spring member)
R Oscillation center axis S Work rotation center axis T Tool rotation center axis

Claims (4)

A work turntable provided on the apparatus base and configured to support and rotate the work;
A column provided on the apparatus base, and a tool support is mounted so as to be movable in a direction along the rotation center axis of the workpiece;
A machining head that is attached to a support shaft that is slidably mounted on the tool support base around an oscillation center axis perpendicular to the rotation center axis, and that rotationally drives a machining tool that contacts the peripheral surface of the workpiece. When,
A spring member that is mounted between a swing lever attached to the support shaft and the tool support, and biases a pressing force in the swing direction against the workpiece against the work tool via the swing lever. And
A chamfering apparatus, wherein the machining tool performs machining in accordance with a part to be machined of the workpiece by a swing movement locus centering on the support shaft.   2. The chamfering device according to claim 1, further comprising a tool positioning unit that drives the machining head to a machining position where the machining tool contacts the workpiece and a standby position away from the workpiece via the swing lever. A characteristic chamfering device.   3. The chamfering apparatus according to claim 1, wherein the machining head is attached to a tool support bracket fixed to the support shaft so as to be movable in the axial direction, and an axial spring toward the work is attached to the machining head. A chamfering device, wherein a spring member for biasing a force is provided on the tool holding bracket.   The chamfering apparatus according to any one of claims 1 to 3, wherein the machining head is an air grinder that rotationally drives the machining tool with compressed air.

Images