JP2002254244A - Deburring tool, deburring method and device for umbrella-shaped gear wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve at least either work efficiency or reliability in a deburring tool, a deburring device for an umbrella-shaped gear wheel and the like. SOLUTION: A deburring wheel 52 is relatively movably and relatively unrotatably installed in a tool shaft 130 to be energized on its tip side by a spring 164. The deburring wheel 52 is formed into a discoid and installed by which some a plurality of grooves 192 are inclined in the radial direction on a circular deburring side 190. After chamfering each ridge line of the front cone side of a spiral bevel gear 16 and a back cone side 144 by a chamfering milling 50, the deburring wheel 52 is moved to bring the deburring side 190 into line contact with the back cone side 144 to be pressed resiliently by the energization power of the spring 164. The deburring wheel 52 and the spiral bevel gear 16 are allowed to rotate in this state to cut the burr on the ridge line by edges of the ditches 192.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a deburring tool, a deburring device for a bevel gear, a deburring method for a bevel gear,
The present invention relates to a method of chamfering and deburring a gear and a device for chamfering and deburring a gear, and more particularly to improvement of workability or reliability.

[0002]

2. Description of the Related Art For example, a blank is subjected to gear cutting,
In the case of forming a bevel gear, burrs are generated on the ridgeline generated by the intersection of the inner side surface (tooth surface or bottom surface) of the tooth groove and one of the front and back conical surfaces of the gear. Also, chamfering may be performed on the ridgeline formed by the intersection of the inner side surface of the tooth groove and the front or back conical surface,
Burr may be generated by the chamfering process. Conventionally, these burrs have been removed by a plate-like deburring member or a wire brush.

[0003]

However, when deburring is performed by a plate-shaped deburring member, the deburring member elastically contacts the back cone surface or front cone surface of the bevel gear. It takes time to remove the burrs by relatively moving the deburring member and the bevel gear while maintaining the state, and there is a problem of poor workability. Also, wire brushes are easy to wear and need to be replaced frequently,
If deburring is performed with a worn wire brush after ignoring replacement, there is a problem that burrs are not sufficiently removed and the reliability of removal is low.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and aims to improve at least one of the deburring workability and reliability. A tool, deburring device, bevel gear deburring device, bevel gear deburring method, gear chamfering / burring method, and gear chamfering / burring device are obtained. As in the case of the claims, each aspect is divided into sections, each section is numbered, and if necessary, is described in a form in which the numbers of other sections are cited. This is for the purpose of facilitating the understanding of the present invention and should not be construed as limiting the technical features and combinations thereof described in the present specification to those described in the following sections. . Further, when a plurality of items are described in one section, the plurality of items need not always be adopted together. It is also possible to select and adopt only some of the items.

[0005] In each of the following items, the item (1) corresponds to the item (1), the combination of the items (2) and (4) corresponds to the item (2), and the item (5) corresponds to the item (1). Claim 3 is a combination of (6) and (7) in Claim 4, (11) is in Claim 5, (12) is in Claim 6, and (14) is in Claims. 7 respectively.

(1) A plurality of grooves extending in a direction having a component parallel to the straight line are formed on a deburring surface formed by rotating a straight line including a portion separated from the center axis around the center axis. Deburring tool formed. The straight line including the portion separated from the central axis may be a straight line that intersects the central axis at right angles, a straight line parallel to the central axis, a straight line that intersects the central axis at an angle other than a right angle, or a three-dimensional intersection with the central axis. Straight line. The deburring surface only needs to be rotatable while being in line contact with the deburring target surface, and since the deburring surface is generally a straight line as a bus, the deburring surface is composed of a set of straight buses. If the trajectory of a straight line that does not overlap with the central axis is rotated around the central axis is taken as the deburring surface, the deburring surface and the surface to be deburred are line-contacted on their generatrix. The deburring surface can be rotated in the state in which the deburring is performed. The deburring tool is
With the deburring surface being in line contact with the deburring surface of the deburring object, the deburring surface is rotated about its central axis, and a plurality of edges defining each opening of the plurality of grooves of the deburring surface are sequentially arranged. It comes into contact with the surface to be deburred and the burrs are removed. Therefore, it is desirable that the edge be sharp. The deburring tool can be easily and quickly removed by rotating the deburring tool while contacting the deburring surface, and the deburring surface is less likely to wear because it contacts the deburring surface. A highly reliable deburring tool is obtained. (2) The deburring tool according to (1), wherein the deburring surface is a circle orthogonal to the central axis. A deburring tool having a circular deburring surface is easy to manufacture and can be used for deburring various deburring surfaces such as a flat surface, a cylindrical outer peripheral surface, and a tapered outer peripheral surface. (3) The deburring tool according to (2), wherein the deburring tool has a generally disk shape, and one surface of the deburring surface is the deburring surface. (4) The groove is inclined with respect to the radial direction of the circle. (2)
Deburring tool according to paragraph or (3). The groove may be formed parallel to the radial direction of the circle. However, if the groove is inclined with respect to the radial direction, the angle between the edge of the groove and the ridge line where the burrs occur can be set arbitrarily. For example, even when the burrs are formed on ridges extending in a direction perpendicular to the tool rotation axis, the burrs are sequentially removed from one end in the longitudinal direction of the ridges to the other end, and the driving torque is relatively small. Deburring can be performed stably. Further, it is possible to prevent the deburring target portion from being fitted into the groove, causing excessive interference between the edge of the groove and the vicinity of the ridgeline of the deburring target portion, and at least one of the two to be prevented from being damaged. For example, when the object to be deburred is a bevel gear, and the ridgeline formed by the intersection of the inner surface of the tooth groove and the back conical surface or the front conical surface is the deburring target portion, the groove may be inclined. For example, the grooves are inclined with respect to the direction in which the teeth are set, and it is possible to prevent the teeth from being fitted into the grooves. (5) The deburring tool according to any one of (1) to (4), wherein the groove is terminated on an inner peripheral side of an outer peripheral edge of the deburring surface. A portion in which no groove is formed and which is continuous in the circumferential direction functions as a guide portion for guiding the contact between the deburring tool and the deburring target surface. If the groove reaches the outer edge of the deburring surface, the deburring surface may not contact the deburring surface when the opening of the groove reaches the position facing the deburring surface. While the position of the tool with respect to the surface to be deburred cannot be determined accurately at the correct position, if there is a guide portion that is continuous in the circumferential direction, the guide portion is, for example, the tooth of the back cone surface of the bevel gear. By bringing the groove into contact with the portion where the groove is not open, the approach limit of the deburring tool to the deburring target surface can be reliably defined, and stable deburring can be performed. According to the deburring tool adopting the features of this section and the features of section (4), deburring can be performed particularly well. Depending on how the deburring tool is applied to the deburring surface, a deburring tool whose groove is terminated on the outer peripheral side from the inner peripheral edge of the deburring surface may be effective. Deburring tools terminated at a location remote from both the outer and inner perimeters can also be manufactured. Further, when the deburring surface is a cylindrical outer peripheral surface, the groove is terminated inside at least one of both axial ends of the outer peripheral surface. In short, it is desirable that the groove be terminated inside the circumferentially extending edge of the deburring surface, and that a portion where the groove is not formed extend along the edge. (6) The deburring tool described in any of the above paragraphs (1) to (5), a rotary shaft fitted to the deburring tool so as to be non-rotatable and relatively movable in the axial direction, A biasing device provided between the tool and the rotating shaft for biasing the deburring tool in one direction parallel to the axis of the rotating shaft with respect to the rotating shaft; and a deburring tool based on the biasing force of the biasing device. A deburring device including: a stopper that defines a movement limit of the rotary shaft; and a rotary driving device that drives the rotary shaft to rotate. The deburring tool is
The deburring surface is rotated by the urging force of the urging device while being pressed against the deburring target surface of the deburring object, thereby removing the burrs. By the urging of the urging device, a state where the deburring surface comes into contact with the deburring target surface and the deburring is removed is reliably obtained. (7) A gear rotating device for holding a bevel gear and rotating it around a central axis thereof, and the deburring tool on one of a back conical surface and a front conical surface of the bevel gear held by the gear rotating device. The deburring surface is elastically pressed based on the urging force of the urging device, and the rotary shaft is positioned so that the deburring surface is in line contact with one of the back cone surface and the front cone surface. The deburring device according to the above mode (6), comprising a rotating shaft holding device for holding the rotating shaft. Bevel gears are straight bevel gears,
Includes helical bevel gears, spiral bevel gears, hypoid gears, etc. (8) The deburring apparatus according to the above mode (7), further comprising an adjusting device that adjusts a pressing force of the deburring surface, one of the back conical surface and the front conical surface. The adjusting device may be provided on one of the gear rotating device and the rotating shaft holding device, and may be provided between the two devices separately and independently of the two devices. The adjusting device may be a device that adjusts the pressing force by, for example, adjusting the position of the rotating shaft in a direction having an axial component with respect to the bevel gear, or the adjusting device may be configured to adjust the pressing force at the initial stage (when the deburring surface is removed). A device that adjusts the pressing force by adjusting the load during the period of non-biasing may be used. (9) A deburring tool according to the above (1), a rotary shaft, and a joint device for connecting the deburring tool to the rotary shaft so as to be movable in the radial direction of the rotary shaft and capable of transmitting rotation, and a flash is always provided. The deburring tool is positioned at a position substantially concentric with respect to the rotation axis, and when the radial force of the rotation axis is applied, the rotation of the deburring tool is generated while generating an elastic force against the radial force. A deburring device including: a tool holding device including a positioning device that allows eccentricity with respect to a shaft; and a rotation driving device that drives the rotation shaft to rotate. Item (7) or (8) above
The features described in the section are also applicable to the deburring apparatus of this section. (10) A gear rotating device for holding a bevel gear and rotating it around its central axis, and the deburring tool on one of a back conical surface and a front conical surface of the bevel gear held by the gear rotating device. The deburring surface is elastically pressed based on the elastic force of the positioning device, and the rotary shaft is positioned so that the deburring surface is in line contact with one of the back cone surface and the front cone surface. Including a rotating shaft holding device for holding
The deburring device described in (9). (11) The deburring surface of the deburring tool described in any of (1) to (5) is brought into line contact with one of the back cone surface and the front cone surface of the bevel gear. Rotate the tool and the bevel gear around their respective central axes,
A deburring method for a bevel gear that removes a burr existing at a ridge formed by an inner surface of a tooth groove of the bevel gear and a back conical surface or a front conical surface intersect. (12) The deburring surface of the deburring tool described in (5) is formed on the back conical surface or the front conical surface of the gear, and the portion of the deburring surface where the groove is formed is formed on the back conical surface or the front conical surface. In a state where at least a part of the part where the groove is not formed contacts at least a part of the part where the tooth groove of the dorsal conical surface or the front conical surface does not open. Deburring method of the bevel gear to be contacted. The deconical surface of the deburring tool is obtained by contacting at least a part of the deburred surface of the deburring surface with at least a part of the back conical surface or the front conical surface where the groove is not open. Alternatively, the approach limit to the front conical surface is reliably defined, and stable deburring can be performed. (13) At least one of the ridge lines generated when the work shaft that rotates while holding the gear to be chamfered intersects with the inner surface of the tooth groove of the gear and the surface where one of both ends of the tooth groove is open. A tool axis that holds and rotates a chamfering tool that performs chamfering on the part, the tool axis and the work axis, the rotation of both axes, at least one of the axial movement and the radial movement of at least one of the two axes. A chamfering tool for removing a flash existing on the ridge line, on the tool axis of the gear chamfering device including a relative motion imparting device for imparting a relative motion required for chamfering by the chamfering tool. A method of chamfering and deburring a gear, wherein mounting and deburring by the deburring tool are performed following chamfering by the chamfering tool. The gear may be not only a bevel gear but also another gear such as a spur gear. According to this aspect, by changing the position of the tool shaft with respect to the gear, a tool for machining the gear can be changed, and it is possible to quickly shift from chamfering to deburring, thereby improving machining efficiency. . Also, at least a part of the tool shaft and the mechanical part of the relative motion imparting device are common to the chamfering tool and the deburring tool, so that the chamfering and deburring can be performed at a low cost with a simple configuration. As the deburring tool,
Those described in any of paragraphs (1) to (5) are preferable, but not limited thereto. (14) At least one of the ridge lines generated when the work shaft that rotates while holding the gear to be chamfered intersects with the inner surface of the tooth groove of the gear and the surface on which one of both ends of the tooth groove opens. A tool axis that holds and rotates a chamfering tool that performs chamfering on the part, the tool axis and the work axis, the rotation of the two axes, and at least one of the axial movement and the radial movement of at least one of the two axes. A chamfering relative motion imparting device for imparting a relative motion required for chamfering by the chamfering tool, and a deburring tool provided on the tool shaft for removing a flash existing on the ridge line. A deburring tool mounting device,
A chamfer for a gear, comprising: a deburring relative motion imparting device for imparting a relative motion required for deburring by the deburring tool, the device including at least rotation of both the tool axis and the work axis.・ Deburring device. As the deburring tool, those described in any of the above-mentioned items (1) to (5) are suitable, but not limited thereto. According to the present mode, for example, the operation and effect described in the mode (13) can be obtained.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a gear chamfering / burring apparatus 10. In FIG. 1, reference numeral 12 denotes a bed of the gear chamfering / burring device 10. On the bed 12, a gear rotating device 14 as a work rotating device is provided, which holds a spiral bevel gear 16 which is a kind of a gear to be deburred and a kind of a bevel gear,
Rotate it around its central axis.

The gear rotating device 14 has a work shaft 18 rotatable about one axis, in the illustrated example, a vertical axis, and a work shaft rotating device 20 for rotating the work shaft 18.
The work shaft rotation device 20 uses the work shaft rotation motor 22 as a drive source, and the rotation of the work shaft rotation motor 22 is transmitted to the work shaft 18 by a worm gear 28 including a worm 24 and a worm wheel 26, and the work shaft 18
Is its own axis, which is rotated about a vertical axis and kept stationary at a predetermined position.

The work shaft 18 is provided with a chuck 34 (see FIG. 3) as a work holder. In the example shown,
The chuck 34 is operated by a chuck cylinder 36 to hold and release the spiral bevel gear 16 concentrically with the work shaft 18. The work shaft rotation motor 22 is constituted by a servo motor, which is a kind of an electric motor capable of controlling the rotation angle with high accuracy, and in the illustrated example, by an AC servo motor, and the work shaft 18 is provided with the spiral bevel gear 16. The spiral bevel gear 16 is rotated about the center axis thereof while being held and rotated by an arbitrary angle in both the forward and reverse directions.

In the illustrated example, the beveled bevel gear 16 is chamfered by using a chamfering milling tool 50 as a chamfering tool, and is also deburred by a deburring wheel 52 which is a kind of deburring tool. You. In the illustrated example, the chamfering milling cutter 50 and the deburring wheel 52 are provided with an X-axis direction and a Z-axis direction which are two directions orthogonal to each other in a horizontal plane which is a plane perpendicular to the rotation axis α of the work shaft 18. In the example shown in the drawing, a linear motion in the Y-axis direction, which is a direction parallel to the rotation axis α of the shaft 18, is imparted, and a swiveling motion about the axis β in a direction parallel to the X-axis direction. When,
A rotational motion about its own axis and about an axis orthogonal to the turning axis β is provided.

For this purpose, an X-axis slide 60 is provided on the bed 12 so as to be movable in the X-axis direction. The X-axis slide 60 is driven by a pair of guide rails 68 and X-axis slides by a X-axis slide drive device 66 having an X-axis drive motor 62 as a drive source, a ball screw 64 as a feed screw, and a nut not shown. It is moved in the X-axis direction while being guided by a guide device including a guided member (not shown) provided at 60. The X-axis slide 60 and the X-axis slide driving device 66 constitute an X-axis moving device 69.

On the vertical side surface 70 of the X-axis slide 60,
A Y-axis slide 72 is provided movably in the Y-axis direction (up-down direction). The Y-axis slide 72 is driven by a Y-axis slide driving device 78 including a Y-axis drive motor 74 as a drive source, a ball screw 76 as a feed screw, and a nut 77, and a pair of guide rails 80 and a Y-axis slide 72 as guide members. The guide member is guided by a guide device (not shown) provided in the guide member and is moved in the Y-axis direction. The Y-axis slide 72 and the Y-axis slide driving device 78 constitute a Y-axis moving device 82.

On the vertical side surface 90 of the Y-axis slide 72,
A Z-axis slide 92 is provided movably in the Z-axis direction. The Z-axis slide 92 includes a Z-axis drive motor 94 as a drive source, a ball screw 96 as a feed screw, and a nut 97.
Are driven by a Z-axis slide driving device 98 including a pair of guide rails 100 serving as guide members and a guided device (not shown) provided on the Z-axis slide 92 to guide in the Z-axis direction. Moved. Z-axis slide 92 and Z-axis slide drive 98
Constitute the Z-axis moving device 102. In FIG. 1, reference numeral 104 denotes a balance weight.

The Z-axis slide 92 has a tool holder 110
Are rotatably provided around an axis β parallel to the X-axis direction. The tool holder 110 is mounted on the Z-axis slide 92,
It is supported by a turning shaft 112 rotatably provided around the axis β, and is rotated by a turning drive device 116 having a turning motor 114 as a drive source. The rotation of the turning motor 114 is controlled by a worm gear 122 including a worm 118 and a worm wheel 120.
When the turning shaft 112 is rotated, the tool holding table 110 is rotated, and the chamfering milling cutter 50 and the deburring wheel 52 are turned in a vertical plane, and are positioned at the turned position. Is kept. Swing shaft 112 and swivel drive 11
6 constitutes a tool turning device 124.

A tool shaft 130 is provided on the tool holder 110.
It is held rotatably about an axis orthogonal to the axis of the turning shaft 112, and is rotated about its own axis by the rotation drive device 132. The rotation driving device 132 is configured using a tool shaft rotation motor 134 as a drive source. In the present embodiment, the tool rotation motor 134 is configured by an electric motor. As shown in FIGS. 2 and 3, the chamfering milling cutter 50 is attached to a protruding end portion of the tool shaft 130 from the tool holding base 110 so as to be concentric and relatively non-rotatable and relatively non-movable in the axial direction. When the tool shaft 130 is rotated, the chamfering milling cutter 50 is rotated about its central axis.
The tool shaft 130 is a rotating shaft.

The X-axis driving motor 62, the Y-axis driving motor 74, the Z-axis driving motor 94, and the turning motor 114 are, as shown in FIG. The X-axis slide 60, the Y-axis slide 72, and the Z-axis slide 92 are moved to arbitrary positions in each of the X-axis, Y-axis, and Z-axis directions. The reference numeral 52 is used to rotate the rotary shaft 112 to an arbitrary position around the axis. A step motor may be used instead of the servo motor.

In the illustrated example, the chamfering mill 50 has a plurality of blade portions 136 provided at equal angular intervals on a circle around the center axis thereof, and the bevel gear 16 is adjacent to each other. Inner surface 1 of tooth groove 138 between teeth 137
Ridge lines 146, 14 formed by the intersection of the front conical surface 142 and the back conical surface 144 of the spiral bevel gear 16 in which both ends of the tooth groove 138 are opened.
8, each of which forms an acute angle, ie, the teeth 13
In the two curves defining the tooth tip surface of No. 7 and intersecting with the arc defining the outer peripheral end of the tooth 137, a portion where the intersection angle forms an acute angle is chamfered.

As shown in FIG. 3, the deburring wheel 52 is mounted on a portion of the tool shaft 130 closer to the tool holder 110 than the chamfering mill 50 so as to be relatively non-rotatable and relatively movable in the axial direction by a wheel holder 150. Have been. The wheel holder 150 has a hollow cylindrical shape with a circular cross section, and is fitted concentrically to the outside of the tool shaft 130 so as to be relatively movable in the axial direction. Wheel holder 1
Reference numeral 50 denotes a structure in which a plurality of members are assembled together, and functions as an integrated wheel holder 150 after the assembly. A key groove 154 extending in the axial direction is provided on the inner peripheral surface of the wheel holder 150, and a key 156 provided on the tool shaft 130 is fitted so as to be relatively movable in the longitudinal direction of the key groove 154. Accordingly, the relative movement of the tool shaft 130 and the wheel wheel 50 in the axial direction is allowed, the rotation of the wheel holder 150 with respect to the tool shaft 130 is prevented, and the rotation of the tool shaft 130 is transmitted to the wheel holder 150. . In the illustrated example, the keyway 15
The key 4 and the key 156 constitute a relative rotation preventing device or a rotation transmitting device.

The wheel holder 150 is a compression coil spring (hereinafter abbreviated as a spring) 1 as an elastic member, which is a kind of a biasing device disposed between the wheel holder 150 and the tool shaft 130.
64, the deburring wheel 52 urged in one direction parallel to the axis of the tool shaft 130, away from the tool holder 110, toward the tip of the tool shaft 130, and held by the wheel holder 150. Biased in the direction.
Wheel holder 15 based on biasing force of spring 164
The travel limit of the deburring wheel 152 from zero is defined by a retaining ring 166 fitted on the tool shaft 130. The retaining ring 166 forms a stopper.

The deburring wheel 52 is made of a material having sufficient hardness for deburring. In the illustrated example, SCM415, which is a kind of alloy steel for machine structure and a kind of low carbon steel, is immersed. It is made by charcoal quenching and polishing. It may be made of a material that is hardened to obtain high hardness, such as tool steel.

The deburring wheel 52 is shown in FIGS.
As shown in the figure, the disk-shaped member is fitted concentrically outside the wheel holder 150 in a fitting hole 170 formed through the center of the disk. Deburring wheel 52
Forms a ring shape. Deburring wheel 52
Is a surface perpendicular to the center axis thereof, and a surface 172 opposite to the chamfering mill 50 side is a surface provided on the wheel holder 150, and
It is brought into contact with a contact surface 174 orthogonal to the 0 axis, and is detachably fixed to the wheel holder 150 by a plurality of bolts 176 which are a kind of fixing device.

3 and 5, the deburring wheel 52 is formed with a keyway 180 which is opened in the surface 172 and penetrates in the radial direction, and which is in contact with the wheel holder 150 from the contact surface 174. The rotation of the wheel holder 150, that is, the rotation of the tool shaft 130, is transmitted to the deburring wheel 52. The key groove 180 and the key 182 constitute a rotation transmitting device. The deburring wheel 52 is mounted on the tool shaft 13 by the wheel holder 150.
Since the tool shaft 130 is rotated, the tool shaft 130 is rotated around its own central axis line.

The surface on the side opposite to the surface 172 of the deburring wheel 52 on the side of the chamfering mill 50 constitutes a deburring surface 190. In the present embodiment, a deburring surface is provided in front of the deburring wheel 52. In the example shown, the deburring surface 190 is formed by rotating a straight line perpendicular to the central axis of the deburring wheel 52 around the central axis, and is a circle perpendicular to the central axis of the deburring wheel 52. .

A plurality of grooves 192 are formed in the deburring surface 190 as shown in FIG. These grooves 192
Are formed in such a shape that they are inclined with respect to the radial direction of the circle, open on the inner peripheral surface of the deburring wheel 52, and are terminated on the inner peripheral side from the outer peripheral edge. An outer peripheral portion of the deburring surface 190, in which a plurality of grooves 192 are not formed, and a portion that is continuous in the circumferential direction forms an annular guide portion 194.

The gear chamfering and deburring device 10 is controlled by a control device 200 (see FIG. 1). The control device 200 is mainly configured by a computer, and controls various actuators such as the work shaft rotation motor 22 via a drive circuit (not shown). The rotation angle of the work shaft rotation motor 22 and the like is detected by an encoder (not shown) as a rotation detection device, and the motor 22 and the like are controlled based on the detection signal and the like. Further, a program for chamfering and deburring the spiral bevel gear 16 and the like are stored in a memory of the computer.

When the beveled bevel gear 16 is chamfered and deburred by the gear chamfering / deburring apparatus 10 configured as described above, as shown in FIG. 1 and FIG. The bevel gear 16 is held. Then, each moving device 69, 8 of X axis, Y axis, Z axis
2 and 102 are controlled by the control device 200, the tool holding table 110 is moved in each of the X-axis, Y-axis, and Z-axis directions to move the chamfering milling cutter 50. 110 is rotated so that the chamfering milling cutter 50 is turned, and first, as shown in FIG. 2, for example, as shown in FIG. The chamfering mill 50 is automatically positioned.

After positioning, chamfering is performed. On this occasion,
The tool shaft 130 is rotated, and the chamfering milling cutter 50 is rotated, and is moved in the Z-axis direction and the Y-axis direction. Further, the spiral bevel gear 16 is indexed and rotated by the work shaft rotating device 20 for each tooth. The movement of the tool shaft 130 and the rotation of the beveled bevel gear 16 are performed in synchronization with each other.
Are relatively moved, and the ridgeline 148 is chamfered.

When the chamfering for one tooth is completed, the chamfering mill 50 is returned to the machining start position by following a path that does not interfere with the spiral bevel gear 16. For example, the beveled bevel gear 16 is rotated in the reverse direction, and the chamfering milling cutter 50 is returned along a path similar to that at the time of chamfering. Thereafter, the spiral bevel gear 16 is rotated, and the tooth 137 to be chamfered next is indexed to a processing position to perform the processing.

If all the teeth 137 of the spiral bevel gear 16 are chamfered on the ridge 148 on the outer peripheral side,
Chamfering is performed on the ridgeline 146 on the inner peripheral side. At this time, though not shown, the chamfering milling cutter 50 is positioned at a position and an angle for chamfering the ridgeline 146 of the spiral bevel gear 16 and chamfering one tooth at a time.

If chamfering has been performed on both the edge lines 146 and 148, deburring is performed. Deburring is
This is performed for the ridgeline 148. At this time, the chamfering mill 50 and the deburring wheel 52 are moved by the X-axis moving device 69.
Are controlled by the control device 200, X
Axis, the Y axis and the Z axis, and the axis β
And the beveling mill 50 is disengaged from the spiral bevel gear 16 as shown in FIG. 3 and the deburring wheel 52 is automatically positioned at the deburring position and angle. The deburring position and the angle are as follows: a portion where the groove 192 is formed on the dorsal conical surface 144 of the bevel gear 16 that is wound around the deburring surface 190 (a portion between two two-dot chain lines shown in FIG. 4); Dorsal conical surface 144
The guide portion 194 is in contact with a part where the tooth groove 138 is open and a part of the part where the tooth groove 138 is not open, and the guide part 194 is another part of the part where the tooth groove 138 of the dorsal conical surface 144 is not open. And in line with a straight line perpendicular to the central axis of the deburring wheel 52, the back conical surface 1
This is the position and angle at which the bus line 44 and the deburring surface 190 are in line contact with each other at their generatrix. These positions and angles are obtained in advance by calculation or the like and stored in the memory of the computer, and the chamfering mill 50 and the deburring wheel 52 are automatically moved to the preset positions and angles. It is not necessary for the operator to align the chamfering mill 50 and the deburring wheel 52.

At this time, in the axial direction of the tool shaft 130, the deburring surface 190 is pressed against the back conical surface 144 based on the urging force of the spring 164 by a predetermined pressing force (for example, a pressing force of several kg or less). ) Is positioned at a position where it is elastically pressed. This position is obtained in advance by calculation or the like and stored in the memory of the computer, and the Z-axis drive motor 94 is operated according to the position data. As a result, the tool shaft 130 is moved to the deburring surface 190.
The beveled bevel gear 16 is further advanced a small distance from the state in which the beveled gear 16 is in contact with the back cone surface 144. The movement of the tool shaft 130 is allowed by the compression of the spring 164 and the relative movement of the wheel holder 150 with respect to the tool shaft 130, and the deburring wheel 52 is pressed against the back cone surface 144 with a predetermined pressing force. The Z-axis slide 92 is stopped in a state where the tool shaft 130 is located at a preset position, is kept at that position, and positions and holds the tool shaft 130.

After the positioning, the tool shaft 130 is rotated, and the deburring wheel 52 is rotated.
The bevel gear 16 is rotated. During deburring, the spiral bevel gear 16 is continuously rotated at a constant speed a plurality of times. The deburring surface 190 is formed at the portion where the groove 192 is formed by the tooth groove 13 of the back conical surface 144.
8 comes into contact with the opened portion, and the edge of the groove 192 functions as a kind of cutting blade to cut off the burrs existing at the ridgeline 148. The edge of the groove 192 is an opening edge of the groove 192 to the deburring surface 190, and the groove 192 of the deburring surface 190
Are defined by the portions that are opened.

The deburring wheel 52 includes a spring 16
4 is pressed against the spiral bevel gear 16 by the urging force of 4, and a state in which the burrs are removed by contacting the back cone surface 144 is reliably obtained, and the burrs are removed satisfactorily. Further, since the groove 192 is provided to be inclined in the radial direction of the circle of the deburring surface 190 and is inclined with respect to the generatrix of the deburring surface 190, the ridge line 1 extending in a direction perpendicular to the axis of rotation of the tool is provided.
The burrs formed on the ridge line 148 are stably removed from one end in the longitudinal direction of the ridge line 148 to the other end thereof, and the groove 192 coincides with the setting direction of the tooth 137. 137 fits into the groove 192 and avoids damaging at least one of them. Further, the deburring surface 190 is always in contact with a portion of the guide portion 194 that is separated from the teeth 137 of the dorsal conical surface 144 of the spiral bevel gear 16 and is continuous in the circumferential direction. The approach limit of the take-off wheel 52 to the spiral bevel gear 16 is defined, and the deburring is performed stably.

When the burrs are removed, the rotation of the bevel gear 16 and the deburring wheel 52 is stopped, and the tool shaft 130 is retracted so that the deburring wheel 52 is separated from the bevel gear 16. Can be

As is clear from the above description, in this embodiment, the Y-axis moving device 82 and the Z-axis moving device 10
2, control the gear rotating device 14 and the rotation driving device 132, and those devices 82 and the like of the control device 200 to index and rotate the spiral bevel gear 16 and rotate and move the chamfering milling cutter 50 to perform chamfering. And the portion constitute a chamfering relative motion imparting device, and the gear rotating device 1
4 and a rotation driving device 132, a part for controlling the devices 14 and the like of the control device 200, and rotating the bevel gear 16 and the deburring wheel 52 to perform deburring, and a deburring relative motion imparting device. Make up. Both relative motion imparting devices share a part of the mechanical configuration. The wheel holder 150 and the bolt 176 constitute a deburring tool mounting device, and the chamfering relative motion imparting device, the deburring relative motion imparting device, the work shaft 18,
The chamfer for a gear according to claim 7, together with the tool shaft 130.
It is considered to constitute a deburring device. It is considered that the gear chamfering / deburring apparatus 10 in a state where the chamfering milling cutter 50 and the deburring wheel 52 are not attached constitutes the gear chamfering / deburring apparatus according to claim 7. The spring 164 is compressed by a predetermined amount in the Z-axis direction of the tool shaft 130 of the control device 200, and the deburring wheel 52 is pressed against the dorsal conical surface 144 of the spiral bevel gear 16 with a predetermined pressing force to make line contact. The part to be positioned at the position where the state is set and the Z-axis moving device 102 constitute a rotating shaft holding device, and include a deburring wheel 52, a tool shaft 130, a spring 164, a retaining ring 166, a rotation driving device 132, and a gear rotating device 14. Together with the above, it may be considered that the deburring device according to claim 4 is configured. Further, a portion of the control device 200 for adjusting the axial position of the tool shaft 130 with respect to the spiral bevel gear 16 constitutes an adjusting device for adjusting the pressing force mainly by adjusting the compression amount of the spring 164.

In the above embodiment, the ridge 148 on the outer peripheral side of the spiral bevel gear 16 is deburred, but the ridge 146 on the inner peripheral side may be deburred. The embodiment will be described with reference to FIGS.

As shown in FIG. 6, the deburring wheel 252 of the deburring device 250 of the present embodiment is attached to the tool shaft 256 as a rotating shaft in the radial direction of the tool shaft 256 by an Oldham coupling 254 which is a kind of a joint device. Are connected so as to be movable and transmit rotation. Deburring wheel 252
Although the illustration and description are omitted, the tool axis 256 is moved in the X-axis,
It is moved in the Y-axis and Z-axis directions, and is moved and turned by being turned around the turning axis. The tool shaft 256 is rotated around its own axis by a rotation drive device (not shown).

The outer peripheral surface of the deburring wheel 252 is a tapered outer peripheral surface whose diameter increases linearly toward the tip, and is a conical surface from which the head is removed. This outer peripheral surface constitutes the deburring surface 260, and a plurality of grooves 262 are formed. In the present embodiment, the deburring surface 260 is formed by rotating a straight line that intersects the central axis of the deburring wheel 252 at an angle smaller than a right angle around the central axis.

The plurality of grooves 262 are provided so as to be inclined with respect to the generatrix of the deburring surface 260, and are provided on the base end side of the deburring wheel 252, that is, on the tool shaft 256 side or the side where the diameter of the deburring surface 260 is small. It is open at the end face, and ends at the distal end of the deburring wheel 252, that is, the end opposite to the tool shaft 256, at the base end side from the end where the diameter of the deburring surface 260 is larger. Deburring surface 2
A groove 292 is not formed at the distal end of 60, and a portion that continues in the circumferential direction constitutes the guide portion 264.

The Oldham coupling 254 is described in, for example,
The structure is the same as that of the Oldham coupling described in JP-A-348888, and will be briefly described with reference to FIGS. 7 and 8. At the tip end of the tool shaft 256, a bottomed cylindrical drive rotation unit 270 is provided, and the first joint member 272, the second joint member 274, and the engagement member 276 are fitted into the drive rotation unit 270. . The first joint member 272 includes the drive rotating unit 2
70, the second joint member 274 and the engagement member 276 are fitted with a gap left in the radial direction.

A connecting member 278 is fitted in the first and second joint members 272, 274 and the engaging member 276. The connecting member 278 is fitted to the first joint member 272 without any gap in the radial direction, is fitted to the second joint member 274 and the engaging member 276 with a gap left in the radial direction, and is driven by the screw 280. It is fixed to the rotating part 270.

The first joint member 272 and the second joint member 274
Each of the surfaces facing each other has a trapezoidal cross-sectional shape, and extends in the left-right direction in FIGS. 7 and 8, and a plurality of, for example, two rows of mutually parallel grooves 284 and 286 are formed. A plurality of balls 288, for example, two balls 288 are arranged between the grooves 284 and 286.

The opposite surfaces of the second joint member 274 and the engagement member 276 each have a trapezoidal cross-sectional shape, which is a direction perpendicular to the plane of FIG. Grooves 290, 29 extending in the direction
2 are formed, for example, two rows each, and a plurality of, for example, two balls 294 are arranged between the grooves 290 and 292.

Between the connecting member 278 and the engaging member 276, there is provided a compression coil spring 300 as an elastic member which is a kind of a biasing device.
, The engaging member 276 is pressed against the second joint member 274 via the ball 294, and the second joint member 274 is pressed against the first joint member 272 via the ball 288. In this state, the diameters of the balls 288, 294 are trapezoidal cross-sectional grooves 284, 286, 290, 2 respectively.
92, the first joint member 272, the second joint member 274, and the engagement member 27.
6 is determined to have such a size that a slight gap is generated between the end faces. Therefore, the first joint member 272 and the second joint member 27
4 means that the relative movement and the relative rotation in the axial direction are impossible, but the longitudinal direction of the grooves 284 and 286, that is, the tool shaft 25
6 is relatively movable in one of two directions orthogonal to each other in a plane perpendicular to the axis of the second joint member 2.
The relative movement and the relative rotation in the axial direction are not possible between the 74 and the engaging member 276, but are relative to the longitudinal direction of the grooves 290 and 292 and the other of the two directions.

In the illustrated example, the relative rotation of the first and second joint members 272 and 274 around the axis of the tool shaft 256 is prevented by fitting the plurality of balls 288 into the plurality of grooves 284 and 286. Two joint member 274 and engagement member 2
The relative rotation of the tool shaft 256 with respect to the axis of the tool shaft 256 is prevented by the fitting of the balls 294 into the grooves 290 and 292.

Therefore, the second joint member 274 moves in the left-right direction with respect to the first joint member 272, and the engaging member 276 moves in the front-rear direction with respect to the second joint member 274. Are allowed to move relative to the drive rotation unit 270 in all directions in a plane perpendicular to their axes. If the tool shaft 256 is rotated by the tool rotation motor, the rotation is reliably transmitted to the engagement member 276 via the first joint member 272, the ball 288, the second joint member 274, and the ball 294.

Further, the engaging member 276 and the drive rotating portion 27
Between zero and zero, three or more, for example, four compression coil springs 302 as elastic members, which are a kind of urging device, are provided at equal angular intervals, and urge the engagement member 276 in the radial direction. Always remove the deburring wheel 252 from the tool 25
6 are positioned substantially concentrically.

The deburring wheel 252 is detachably fixed to a radially outward flange-like mounting portion 306 provided at the tip of the engaging member 276 by a plurality of bolts 308 which are a kind of fixing device. ing. Therefore, the deburring wheel 252 moves and rotates integrally with the engagement member 276, and is connected to the tool shaft 256 so as to be movable in the radial direction and to transmit the rotation.
Due to the urging force of the spring 302, it is positioned at a position substantially concentric with the tool shaft 256.

At the time of deburring, the spiral bevel gear 16 is rotated around its central axis by a gear rotating device (not shown). Also, when the tool axis 256 is X axis, Y
The deburring wheel 252 is moved and turned in each direction of the axis and the Z axis, and is positioned at a position and an angle at which the deburring wheel 252 performs deburring. As shown in FIG. 6, the deburring position and the angle are such that the groove 262 of the deburring surface 260 of the deburring wheel 252 opens the tooth groove 138 of the front conical surface 142 of the spiral bevel gear 16. In this state, the guide portion 264 contacts another part of the portion of the front conical surface 142 where the tooth groove 138 is not open. The deburring surface 260 is brought into line contact with the front conical surface 142 at a straight line that intersects the central axis of the deburring wheel 252 at an angle smaller than a right angle, and the front conical surface 142 and the deburring surface 260 are line contacted with each other by their generatrix. Position and angle to be set.

At this time, the tool shaft 256 is
From the state where 0 is brought into contact with the front conical surface 142, the front conical surface 142 is further brought close to the front conical surface 142 in a direction perpendicular to the axis of the tool shaft 256 and a small distance in the radial direction. The deburring wheel 252 is in contact with the front conical surface 142 and does not move, but the tool shaft 256 is moved with respect to the deburring wheel 252, and this movement is caused by the Oldham coupling 254.
And the tool shaft 256 includes a plurality of springs 3
02, the front conical surface 14 with respect to the axis of the tool shaft 256.
The spring 302 located on the side opposite to the side 2 is moved with respect to the deburring wheel 252 while being compressed, so as to approach the front conical surface 142. The spring 302 generates the elastic force against the radial force applied by the tool shaft 256 by compression, and
2, the eccentricity with respect to the tool shaft 256 is allowed, and the deburring surface 260 of the deburring wheel 252 is elastically pressed against the front conical surface 142 with a predetermined pressing force based on the elastic force of the spring 302, It is kept in line contact. The tool shaft 256 has, in its radial direction,
It is moved to a position where the above pressing force is obtained. In the present embodiment, the plurality of springs 302 constitute a positioning device, and together with the tool shaft 256 and the Oldham coupling 254, constitute a tool holding device.

When the tool shaft 256 is rotated with the deburring wheel 252 elastically contacting the front conical surface 142 of the spiral bevel gear 16, the deburring wheel 252 is rotated. Also, the beveled bevel gear 16 is rotated about its central axis, and the burrs present on the ridgeline 146 are removed by the edges that define the openings of the grooves 262 formed in the deburring surface 260.

The deburring wheel 252 is connected to the tool shaft 256 by an Oldham coupling 254, and remains decentered with respect to the tool shaft 256, that is, the deburring surface 260 has a predetermined pressing force against the front conical surface 142. It is rotated while being pressed with to remove burrs. When the tool shaft 256 is rotated, the deburring wheel 2
Although the positions of the respective axes of the tool shaft 52 and the tool shaft 256 do not change, since the two shafts are eccentric to each other, for example, if attention is paid to one point on the engaging member 276, the approach and separation of the axis of the tool shaft 256 are possible. While rotating about the axis of the deburring wheel 252, its relative movement in the radial direction with respect to the axis of the tool shaft 256 is allowed by the Oldham coupling 254, and the deburring wheel 252 is rotated while remaining eccentric. . Further, the spring 302 is expanded and contracted in accordance with the position around the axis of the tool shaft 256,
The amount of compression is reduced by the deburring wheel 25 during non-machining.
The deburring wheel 252 is pressed against the front conical surface 142 at a position where the amount of compression is greater than the amount of compression at the time of biasing the positioning of the plurality of springs 302. The same is true in both cases, and the deburring wheel 252 is always kept pressed against the front conical surface 142 of the spiral bevel gear 16. In the present embodiment, the tool shaft 256 of the control device (not shown) is moved in the radial direction to move the tool shaft 256 with respect to the deburring wheel 252, and the deburring wheel 252 is moved.
The portion that keeps being pressed against the beveled bevel gear 16 with a predetermined pressing force, the Y-axis moving device and the Z-axis moving device constitute a rotating shaft holding device. The control device is
Like the control device, the computer is mainly configured.

During deburring, the Oldham coupling 25 is attached to the deburring wheel 252 by the radial force applied to the deburring wheel 252 from the spiral bevel gear 16.
4 acts on the portion holding the balls 288 and 294, but the urging force of the spring 300 overcomes this moment and causes the first and second joint members 272 and 274 and the engaging member 276 to move. Ball 288,2
The second joint member 27 is pressed against each other with the
4. While keeping the engaging member 276 from tilting with respect to the axis of the tool shaft 256, the deburring wheel 252 is pressed against the front conical surface 142 with its central axis parallel to the axis of the tool shaft 256. It is set to be large enough to keep the Also, grooves 284, 2 of two rows each in which balls 288, 294 of Oldham coupling 254 are fitted.
86, 290 and 292 are widened, which also prevents the deburring wheel 252 from tilting due to the action of the moment.
No. 2 removes burrs satisfactorily while its deburring surface 260 is kept in line contact with the front conical surface 142. After deburring, the tool shaft 256 is moved and the deburring wheel 2 is removed.
When 52 is separated from the spiral bevel gear 16, the engaging member 276 and the deburring wheel 252 are returned to a position substantially concentric with the tool shaft 256 by the biasing force of the spring 302.

The adjusting device for adjusting the pressing force between the deburring surface and the back conical surface is adjusted mainly by adjusting the initial load of a compression coil spring which is an urging device for urging the deburring tool. It may be a device. For example,
In the embodiment shown in FIGS. 1 to 5, the axial position of the wheel holder 150 with respect to the tool shaft 130 is adjustable, thereby adjusting the initial load of the spring 164.

When the deburring tool and the chamfering tool are mounted on a common tool shaft, the deburring tool may be mounted on the tip end of the tool shaft, and the chamfering tool may be mounted on the tool holding table side with respect to the deburring tool. Furthermore, when deburring the front conical surface of the bevel gear, both the chamfering tool and the deburring tool are attached to the tool shaft, and after the chamfering is completed, the deburring tool moves to the deburring position by moving the tool shaft. It may be positioned and deburred.

Although some embodiments of the present invention have been described in detail above, these are merely examples, and the present invention is described in the above section [Problems to be solved by the invention, means for solving problems and effects]. The present invention can be implemented in various modified and improved forms based on the knowledge of those skilled in the art, including the described embodiment.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a gear chamfering / burring device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which the chamfering mill of the gear chamfering and deburring device chamfers a spiral bevel gear.

FIG. 3 is a side view (partial cross section) showing a state where a deburring wheel of the gear chamfering and deburring device deburrs a spiral bevel gear;

FIG. 4 is a front view showing the deburring wheel.

5 is a cross-sectional view of the deburring wheel, and is a cross-sectional view taken along line AA in FIG.

FIG. 6 is a side view (partially in section) showing a deburring wheel of a deburring device according to another embodiment of the present invention together with a spiral bevel gear.

7 is a front sectional view showing an Oldham coupling for connecting the deburring wheel and the tool shaft shown in FIG. 6;

FIG. 8 is a plan sectional view showing the Oldham coupling, and is a sectional view taken along line BB in FIG. 7;

[Explanation of symbols]

10: Gear chamfering / burring device 14: Gear rotating device 16: Rolling bevel gear 18: Work shaft
50: chamfering milling 52: deburring wheel
69: X-axis moving device 82: Y-axis moving device 10
2: Z-axis moving device 124: Tool turning device 13
7: Tooth 138: Tooth groove 140: Inner surface 14
2: Front cone surface 144: Back cone surface 146, 14
8: Ridge line 150: Wheel holder 164: Compression coil spring 166: Retaining ring 190: Deburring surface 192: Groove 194: Guide part 200: Control device 250: Deburring device
252: Deburring wheel 256: Tool axis 2
60: Deburring surface 262: Groove 264: Guide part

Continued on the front page (72) Inventor Masao Anan 3-4, Akatsuki-cho, Seto-shi, Aichi F-Term in Toyo Seimitsu Industry Co., Ltd. (Reference) 3C022 DD03 DD05 3C025 DD02 DD14

Claims (7)

[Claims] 1. A plurality of grooves extending in a direction having a component parallel to the straight line are formed on a deburring surface formed by rotating a straight line including a portion separated from the center axis around the center axis. A deburring tool characterized by: 2. The deburring tool according to claim 1, wherein the deburring surface is a circle orthogonal to the central axis, and the groove is inclined with respect to a radial direction of the circle. 3. The deburring tool according to claim 1, wherein the groove is terminated on an inner peripheral side of an outer peripheral edge of the deburring surface. 4. A deburring tool according to any one of claims 1 to 3, a rotary shaft fitted to the deburring tool so as to be unrotatable and relatively movable in the axial direction. A biasing device provided between the rotating shaft and the biasing device for biasing the deburring tool in one direction parallel to the axis of the rotating shaft with respect to the rotating shaft; and movement of the deburring tool based on the biasing force of the biasing device. A stopper that defines a limit, a rotation driving device that rotationally drives the rotation shaft, a gear rotation device that holds the bevel gear and rotates around a central axis thereof, and a bevel gear held by the gear rotation device. The deburring surface of the deburring tool is on one of the back conical surface and the front conical surface,
A rotating shaft holding member that is elastically pressed based on the urging force of the urging device and positions and holds the rotating shaft in a state where the deburring surface is in line contact with one of the back cone surface and the front cone surface. And a deburring device for a bevel gear. 5. The deburring surface of the deburring tool according to claim 1 is brought into line contact with one of a back conical surface and a front conical surface of a bevel gear. By rotating the cutting tool and the bevel gear around their respective central axes, the burrs existing at the ridge line generated when the inner surface of the groove of the bevel gear intersects the back cone surface or the front cone surface are removed. A deburring method for a bevel gear, which comprises removing the bevel gear. 6. The deburring surface of the deburring tool according to claim 3, wherein the deburring surface is formed on the back conical surface or the front conical surface of the gear, and the portion of the deburring surface on which the groove is formed is formed on the back conical surface or the front conical surface. A state in which the tooth groove of the surface contacts the open part, and at least a part of the part where the groove is not formed contacts at least a part of the part where the tooth groove of the dorsal conical surface or the front conical surface does not open A deburring method for bevel gears, characterized in that they are brought into contact with each other. 7. A ridge line generated when a work shaft that rotates while holding a gear to be chamfered, and an inner surface of a tooth groove of the gear and a surface where one of both ends of the tooth groove intersects. A tool axis that holds and rotates a chamfering tool for chamfering at least a part of the tool axis, the tool axis and the work axis, the rotation of the two axes, the axial movement and the radial movement of at least one of the two axes, A chamfering relative motion imparting device for imparting a relative motion required for chamfering by the chamfering tool, and a deburring tool provided on the tool shaft for removing a flash existing on the ridge line. A deburring tool mounting device that can be mounted, the tool axis and the work axis including at least rotation of both axes, and are necessary for deburring by the deburring tool. Gear chamfering, deburring apparatus comprising a deburring for relative movement imparting device to impart relative motion.