Composite processing machine and tooling

Abstract

To provide a composite processing machine and a tooling which do not require tool replacement when chamfering after gear cutting of a gear.SOLUTION: A composite processing device 100 includes a tooling 108 which is replaceably mounted on a tool main spindle 106, and a control part 110 for controlling operations of a workpiece main spindle 104 and the tool main spindle. The tooling has a shank 124 held on the tool main spindle, a first tool holder 126 that is arranged on the tip side of the shank and on which a gear cutting tool (skiving cutter 120) is mounted, and a second tool holder 128 that is arranged on the tip side of the first tool holder and on which a chamfering tool 130 is mounted coaxially with the shank. The control part processes a tooth surface of a gear 122a mounted on the workpiece main spindle by the gear cutting tool, in a state in which the tool main spindle is inclined at a predetermined angle with respect to the workpiece main spindle, then rotates the tool main spindle at an angle substantially perpendicular to the workpiece main spindle, and removes burrs generated in the gear by a chamfering tool.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a composite machine tool and a turning method for creating a gear on a workpiece by cutting.

Background Art

[0002] As a machining method for creating a gear, hobbing machining and the like are known. Hobbing machining is performed while synchronizing the rotation of the workpiece and the rotation of the tool, and tilting the rotation axis of the tool with respect to the rotation axis of the workpiece. As a result, a difference occurs between the rotation direction of the workpiece and the rotation direction of the tool, and "sliding" occurs when the tool interferes with the workpiece. By utilizing this sliding, the interfering portion is shaved off from the workpiece, and tooth grooves and the like are machined on the workpiece.

[0003] When machining a gear by cutting, the generation of burrs becomes a problem. As conventional techniques for deburring after machining, using a dedicated deburring machine, using a rotary brush or a dedicated tool, or applying a turning tool to the tooth end face and cutting with a cutting depth of zero (zero cut) are well known.

[0004] For example, Patent Document 1 describes a gear chamfering mill which is a drill-shaped chamfering tool. This gear chamfering mill has a shank attached to the spindle of the machine tool, a tapered portion that tapers continuously from the shank, and a plurality of cutting edges formed on the outer periphery of the tapered portion and reaching the tip of the tapered portion. The plurality of cutting edges chamfer the ridge line between the tooth surface and the side surface of the gear.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, when using the chamfering tool of Patent Document 1, after gear machining with a skiving cutter or the like, it is necessary to exchange the skiving cutter and the chamfering tool, which takes a long time for tool exchange. Furthermore, after tool exchange, an operation of aligning the chamfering tool with the phase of the workpiece is also required, which impairs workability.

[0007] In view of such problems, an object of the present invention is to provide a compound machining machine and a tooling in which tool exchange is not required when chamfering is performed after gear cutting.

Means for Solving the Problems

[0008] In order to solve the above problems, a typical configuration of the compound machining machine according to the present invention includes a workpiece spindle, a tool spindle, a tooling that is detachably attached to the tool spindle, and a control unit that controls the operations of the workpiece spindle and the tool spindle. The tool spindle can change the angle with respect to the workpiece spindle, and the tooling has a shank held by the tool spindle, a first tool holder disposed on the tip side of the shank to which a gear cutting tool is attached, and a second tool holder disposed on the tip side of the first tool holder to which a chamfering tool is coaxially attached to the shank. The control unit is characterized in that after machining the tooth surface of a gear attached to the workpiece spindle with a gear cutting tool in a state where the tool spindle is inclined at a predetermined angle with respect to the workpiece spindle, the tool spindle is rotated to an angle substantially orthogonal to the workpiece spindle, and burrs generated on the gear are removed with the chamfering tool.

[0009] A typical configuration of the tooling according to the present invention is a tooling that is detachably attached to the tool spindle of a compound machining machine, and has a shank held by the tool spindle, a first tool holder disposed on the tip side of the shank to which a gear cutting tool is attached, and a second tool holder disposed on the tip side of the first tool holder to which a chamfering tool is coaxially attached to the shank.

Effects of the Invention

[0010] According to the present invention, it is possible to provide a compound processing machine and a tooling that do not require tool change when chamfering is performed after gear hobbing.

Brief Description of Drawings

[0011]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0012] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Dimensions, materials, and other specific numerical values shown in such embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not shown.

[0013] FIG. 1 is a diagram for explaining a compound processing machine 100 according to an embodiment of the present invention. The compound processing machine 100 includes a work spindle 104 that grips a work 102, a tool spindle 106, a tooling 108, and a control unit 110. The control unit 110 controls the operations of the work spindle 104 and the tool spindle 106.

[0014] The compound processing machine 100 is also provided such that a column 114 can travel in the Z-axis direction (left and right direction) by rails 116a and 116b on a wall 112a. A rotary table 118 is provided on the column 114 so as to be movable in the Y-axis direction (up and down direction).

[0015] The tool spindle 106 is attached to the rotary table 118, and the angle (orientation) of the tool spindle 106 can be set by rotating the rotary table 118 in the R direction shown in the figure. Therefore, the tool spindle 106 can change the angle with respect to the work spindle 104.

[0016] The work spindle 104 is movable in the X-axis direction (front-rear direction) by the rails 105a and 105b formed on the wall 112b. The work spindle 104 has a built-in motor and can rotate the work 102 attached thereto in a replaceable manner.

[0017] A tooling 108 is attached to the tool spindle 106 in a replaceable manner. The tool spindle 106 has a built-in motor and can rotate the tooling 108 to perform machining such as cutting. Here, a skiving cutter 120 as an example of a tooth cutting tool attached to the tooling 108 is used for skiving to create a plurality (here, two) of gears 122a and 122b on the work 102. Note that as the tooth cutting tool, a hobbing tool may be used in addition to the skiving cutter.

[0018] FIG. 2 is a diagram for explaining the main part of the tooling 108 in FIG. 1. The tooling 108 has a shank 124 held by the tool spindle 106 (see FIG. 1), a first tool holder 126, and a second tool holder 128.

[0019] The first tool holder 126 is disposed on the tip 124a side of the shank 124, and the skiving cutter 120 is attached thereto. The skiving cutter 120 is fixed by a fixing nut 132 in a state of being passed through the first tool holder 126 and abutting against the tip 124a of the shank 124. A phase determination key 134 is provided between the skiving cutter 120 and the shank 124, and is fixed to the first tool holder 126 while ensuring a constant phase by the phase determination key 134.

[0020] The second tool holder 128 is disposed on the tip 126a side of the first tool holder 126, and the chamfering tool 130 is attached coaxially with the shank 124. A hole 128b extending toward the tip 126a of the first tool holder 126 is provided at the tip 128a of the second tool holder 128. The chamfering tool 130 has a flat surface on the shank (not shown). Then, by inserting the chamfering tool 130 into the hole 128b of the second tool holder 128 as shown in the figure and fixing the flat surface of the shank of the chamfering tool 130 with the fixing screws 136a and 136b, the phases of the skiving cutter 120 and the chamfering tool 130 can be aligned (fixed).

[0021] Figure 3 is a diagram for explaining the operation of the composite machining machine 100 of FIG. 1. First, the control unit 110 cuts the tooth surface of the gear 122a of the workpiece 102 shown in FIG. 3(a) by skiving. The skiving is performed while synchronizing the rotation of the skiving cutter 120 with the rotation of the workpiece 102 and tilting the tool spindle 106, which is the rotation axis of the skiving cutter 120, by a predetermined angle with respect to the workpiece spindle 104 (see FIG. 1), which is the rotation axis of the workpiece 102.

[0022] Also, while cutting the tooth surface of the gear 122a, the skiving cutter 120 moves toward, for example, the side closer to the workpiece spindle 104 (the end face 122c on the side where the gear comes out) in the gear 122a of the workpiece 102 and comes out of the gear 122a. For this reason, burrs are generated on the end face 122c on the side where the gear 122a comes out.

[0023] Next, after cutting the tooth surface of the gear 122a of the workpiece 102 by skiving, the control unit 110 controls the rotary table 118 shown in FIG. 1 to rotate the tool spindle 106 to an angle substantially orthogonal to the workpiece spindle 104. As a result, as shown in FIG. 3(b), the turning tool 108 is in a state substantially orthogonal to the workpiece 102.

[0024] Subsequently, the control unit 110 removes the burr generated on the end face 122c on the removal side of the gear 122a with the chamfering tool 130 attached to the second tool holder 128 of the turret 108. Since the chamfering tool 130 cuts along the end face 122c on the removal side of the gear 122a, it is necessary to align the phases of the chamfering tool 130 and the gear 122a, and the chamfering process is performed by rotating the chamfering tool 130 and the gear 122a synchronously. Here, as described above, since the phases of the skiving cutter 120 and the chamfering tool 130 are aligned (the phases are fixed), it is not necessary to realign the phases of the chamfering tool 130 and the gear 122a.

[0025] In this way, in the composite machining machine 100, the skiving cutter 120 is attached to the first tool holder 126 of the turret 108, and the chamfering tool 130 is attached coaxially with the shank 124 by the second tool holder 128. Then, after the control unit 110 processes the tooth surface of the gear 122a with the skiving cutter 120, the tool spindle 106 is rotated to an angle substantially orthogonal to the work spindle 104, and the burr is removed with the chamfering tool 130. Therefore, after the gear machining by the skiving cutter 120, it is not necessary to exchange the skiving cutter 120 and the chamfering tool 130.

[0026] Also, when the tool to be used is changed from the skiving cutter 120 to the chamfering tool 130, the state where the tool spindle 106 and the work spindle 104 are synchronized is maintained. Therefore, it is not necessary to perform synchronization (phase alignment) associated with tool change. Thus, according to the composite machining machine 100, tool change is not required when performing chamfering after gear cutting, and the tool change time can be shortened and the workability can be improved.

[0027] Further, since the skiving cutter 120 and the chamfering tool 130 are each detachably attached to the turret 108, when tool edge wear occurs on these, only the tool with tool edge wear can be independently exchanged. Therefore, the cost of the tool can be reduced.

[0028] In the above-described compound processing machine 100, although the operation of removing burrs after cutting the tooth surface of the gear 122a of the workpiece 102 has been described, it is also possible to perform cutting of the tooth surface on the gear 122b of the workpiece 102 using the skiving cutter 120, and further remove the burrs generated on the end face 122d on the disengaging side of the gear 122b with the chamfering tool 130.

[0029] Also, in the compound processing machine 100, with the tooling 108 in a state substantially orthogonal to the workpiece 102, the burrs generated on the end faces 122c and 122d on the disengaging side of the gears 122a and 122b are removed respectively. At this time, since the thin drill-type chamfering tool 130 is used, even when multi-stage gears, that is, a plurality of gears 122a and 122b, are cut on the workpiece 102, there is no interference with the gear 122b when removing the burrs of the gear 122a. Thereby, the burrs of the plurality of gears 122a and 122b can be reliably removed.

[0030] As described above, the preferred embodiments of the present invention have been described with reference to the accompanying drawings. Needless to say, the present invention is not limited to such examples. It is obvious that those skilled in the art can conceive of various modification examples or correction examples within the scope described in the claims, and it is naturally understood that they also belong to the technical scope of the present invention.

Industrial Applicability

[0031] The present invention can be used as a compound processing machine and tooling for creating gears on a workpiece by cutting.

Explanation of Reference Numerals

[0032] 100... Composite machining tool, 102... Workpiece, 104... Work spindle, 105a, 105b,... Rails, 106... Tool spindle, 108... Tool magazine, 110... Control unit, 112a, 112b... Walls, 114... Column, 116a, 116b... Rails, 118... Rotary table, 120... Skiving cutter, 122a, 122b... Gears, 122c, 122d... End faces on the side where the gears come off, 124... Shank, 124a... Tip of the shank, 126... First tool holder, 126a... Tip of the first tool holder, 128... Second tool holder, 128a... Tip of the second tool holder, 128b... Hole in the second tool holder, 130... Chamfering tool, 132... Fixing nut, 134... Phasing key, 136a, 136b... Fixing screws

Claims

1. A work spindle, a tool spindle, a turret that is detachably attached to the tool spindle, and a control unit that controls the operations of the work spindle and the tool spindle, wherein the tool spindle can change the angle relative to the work spindle, and the turret includes a shank held by the tool spindle, a first tool holder disposed on the tip side of the shank and to which a gear cutting tool is detachably attached, and a second tool holder disposed on the tip side of the first tool holder and to which a chamfering tool is coaxially attached to the shank, and the control unit processes the tooth surface of a gear attached to the work spindle with the gear cutting tool in a state where the tool spindle is inclined at a predetermined angle with respect to the work spindle, and then rotates the tool spindle to an angle substantially orthogonal to the work spindle to remove burrs generated on the gear by the chamfering tool. A compound machining machine characterized by this.

2. In a turret detachably attached to a tool spindle of a compound machining machine, a shank held by the tool spindle, a first tool holder disposed on the tip side of the shank and to which a gear cutting tool is detachably attached, and a second tool holder disposed on the tip side of the first tool holder and to which a chamfering tool is coaxially and detachably attached to the shank. A turret characterized by this.

3. A phase determination key is provided between the shank and the gear cutting tool, a flat surface is formed on the shank of the chamfering tool, and the turret according to claim 2, characterized in that the phases of the gear cutting tool and the chamfering tool can be aligned.

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