Composite processing machine

Abstract

To provide a composite processing machine which can produce a gear at a position adjacent to a protruding part without damaging the protruding part formed along an outer peripheral surface of an elongated workpiece.SOLUTION: A structure of a composite processing machine 100 molds a gear at a position adjacent to a protruding part 310 in a longitudinal direction of an elongated workpiece 300 on an outer peripheral surface of the workpiece 300 having the protruding part 310 on the outer peripheral surface. The composite processing machine 100 includes: a workpiece main shaft 110 configured to support the workpiece 300 in a rotatable manner; a tool main shaft 130 configured to support a tool; and a cutting chip 200 being a tool attached in an attitude that the cutting chip 200 cuts the workpiece 300 in a radial direction with respect to an axis of the tool main shaft 130. The workpiece main shaft 110 and the tool main shaft 130 are relatively moved in the radial direction of the tool main shaft 130 in a repetitive manner to mold a gear at the position adjacent to the protruding part 310.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a composite processing machine for forming a gear at a position adjacent to a protruding portion of a long workpiece having a protruding portion.

Background Art

[0002] In recent years, a composite processing machine that integrates a device capable of turning, such as a NC lathe, and a device capable of skiving has been put into practical use. As one of the processes performed using the composite processing machine, a gear may be created on the outer peripheral surface of a workpiece.

[0003] Although it is not strictly a composite processing machine, for example, Patent Document 1 discloses "a turning tool including a tool body detachably provided on a rotating spindle of a machine tool, and a turning cutting edge provided on the tool body and having a tip at a turning position coaxially provided with the axis of the rotating spindle." In Patent Document 1, the outer peripheral surface of a cylindrical workpiece W is cut using the turning tool, and then a gear is created on the cut outer peripheral surface.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] When a workpiece is long and the machining position is far from the end of the workpiece (machining in the middle of the workpiece), using a shaper would result in an excessively long shank, reducing machining accuracy. In this case, skiving can be considered, but there may be circumferential or other protrusions near the machining position. In skiving, the distance required for the skiving cutter to exit after cutting is calculated based on the machining conditions, but if the position of the gear adjacent to the protrusion is closer than this calculated distance, the protrusion will be cut away when the skiving cutter exits. For this reason, the technology described in Patent Document 1 cannot be applied when manufacturing gears adjacent to protrusions on long workpieces, and there was room for further improvement.

[0006] In view of the above circumstances, the present invention aims to provide a multi-tasking machine capable of manufacturing gears adjacent to protrusions formed along the outer circumferential surface of a long workpiece without damaging the protrusions. [Means for solving the problem]

[0007] To solve the above problems, a typical configuration of the present invention is a composite machining machine that forms a gear on the outer circumferential surface of a long workpiece having a protrusion on its outer circumferential surface, at a position adjacent to the protrusion in the longitudinal direction of the workpiece, comprising a workpiece spindle that rotatably supports the workpiece, a tool spindle that supports a tool, and a cutting tip which is a tool mounted in a position that cuts the workpiece radially with respect to the axis of the tool spindle, and a gear is formed at a position adjacent to the protrusion by repeatedly moving the workpiece spindle and the tool spindle relative to each other in the radial direction of the tool spindle.

[0008] The above-mentioned multi-tasking machine further includes a control unit that controls the movement of the workpiece spindle and the tool spindle, and the control unit repeats the following: a feed process in which the workpiece spindle and the tool spindle are moved relative to each other in a direction that brings the cutting chips closer to the position on the workpiece where the gears will be formed; a release process in which the tool spindle is moved in a direction that moves the cutting chips away from the workpiece to separate the cutting chips from the workpiece; a return process in which the workpiece spindle and the tool spindle are moved relative to each other in the opposite direction to the feed process to return the cutting chips to their position before the feed process; and a cutting process in which the tool spindle is moved in a direction that brings the cutting chips closer to the workpiece in accordance with the amount of cut in the next feed process. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a multi-tasking machine that can manufacture gears adjacent to protrusions formed along the outer circumferential surface of a long workpiece without damaging the protrusions. [Brief explanation of the drawing]

[0010] [Figure 1] This diagram schematically illustrates the configuration of the multi-tasking machine according to this embodiment. [Figure 2] Figure 1 is a schematic three-view drawing of the cutting chip shown. [Figure 3] This diagram illustrates the forming of gears using the multi-tasking machine of this embodiment. [Modes for carrying out the invention]

[0011] Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. The dimensions, materials, and other specific numerical values ​​shown in these embodiments are merely illustrative to facilitate understanding of the invention and do not limit the present invention unless otherwise specified. In this specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals to avoid redundant explanations, and elements not directly related to the present invention are omitted from the illustrations.

[0012] Figure 1 is a schematic diagram illustrating the configuration of the multi-tasking machine 100 according to this embodiment. As shown in Figure 1, the multi-tasking machine 100 of this embodiment is composed of a control unit 104, a workpiece spindle 110, a tailstock 120, a tool spindle 130, and a cutting tip 200. The control unit 104 controls the overall operation of the multi-tasking machine 100, including the workpiece spindle 110 and the tool spindle 130.

[0013] The workpiece spindle 110 rotatably supports one end of the workpiece 300. The workpiece spindle 110 is positioned on a fixed bed 102 and is rotatable about the workpiece axis C, which is the axial direction of the workpiece 300, and movable in the Z-axis direction, which is parallel to the workpiece axis C. The tailstock 120 is positioned on the fixed bed 102 and supports the other end of the workpiece 300. The tailstock 120 is movable in the Z-axis direction in conjunction with the workpiece spindle 110.

[0014] The tool spindle 130 supports the tool (in this embodiment, a cutting tip 200 is exemplified). The tool spindle 130 is movable in the X-axis direction (a direction moving horizontally away from the work axis C: front-back direction in the figure) and the Y-axis direction (a direction moving vertically away from the Z axis: up-down direction in the figure). The tool spindle 130 is also rotatable in direction A (rotation in a vertical plane parallel to the work axis C).

[0015] Figure 2 is a schematic three-view drawing of the cutting tip 200 shown in Figure 1. Figure 2(a) is a plan view of the cutting tip 200. Figure 2(b) is a side view of the cutting tip 200. Figure 2(c) is a bottom view of the cutting tip 200. The cutting tip 200 is a tool supported on the tool spindle 130, and is supported on the tool spindle 130 via the holder 250 shown in Figures 2(a)-(c).

[0016] As shown in FIGS. 2(a) to 2(c), the cutting tip 200 has a main body portion 210 fixed to the holder 250 and a cutting edge 220 formed on the lower surface of the main body portion 210. The cutting tip 200 is attached in a posture for cutting the workpiece 300 in the radial direction with respect to the B-axis direction (see FIG. 1), which is the axis of the tool spindle 130. Further, as shown in FIG. 2(c), the tip attachment guide 250a has a V shape. Thereby, the replacement reproducibility of the cutting tip 200 can be enhanced.

[0017] In the present embodiment, cutting is performed with the tool spindle 130 (B-axis) and the workpiece axis C orthogonal to each other. And the machining direction (cutting direction) is the radial direction of the tool spindle 130 (the axial direction of the workpiece axis C).

[0018] FIG. 3 is a diagram for explaining the formation of a gear by the compound machining machine 100 of the present embodiment. The compound machining machine 100 of the present embodiment relatively repeatedly moves the workpiece spindle 110 and the tool spindle 130 in the radial direction of the tool spindle 130, so that among the long workpieces 300 having a circumferential protrusion 310 on the outer peripheral surface 302, a gear is formed at a position adjacent to the protrusion 310. Hereinafter, the position (portion) of the workpiece 300 where the gear is formed is referred to as a convex portion 320.

[0019] In the present embodiment, a configuration in which a circumferential protrusion 310 is formed on the outer peripheral surface 302 of the long workpiece 300 is illustrated, but the present invention is not limited thereto. The protrusion 310 may be continuously formed on the outer peripheral surface 302 of the workpiece 300, or may be formed on a part of the outer peripheral surface 302 of the workpiece 300.

[0020] When forming a gear on the convex portion 320, first, as shown in FIG. 3(a), from the state where the cutting tip 200 is disposed on the side opposite to the protrusion 310 with respect to the convex portion 320, the workpiece spindle 110 is moved in the direction in which the cutting tip 200 approaches the convex portion 320 of the workpiece 300 (direction D1 in the figure), and the upper surface 322 of the convex portion 320 is cut by the cutting tip 200 (feed process).

[0021] When the upper surface 322 of the convex portion 320 is cut, as shown in FIG. 3(b), before the cutting edge 220 contacts the protruding portion 310, the movement of the workpiece spindle 110 is stopped. Then, the tool spindle 130 is moved in the direction in which the cutting tip 200 separates from the workpiece 300 (direction D2 in the figure), separating the cutting tip 200 from the workpiece 300 (relieving process).

[0022] Subsequently, the workpiece spindle 110 is moved in the direction opposite to the feeding process (direction D3 in the figure), and the workpiece 300 is arranged so that the cutting tip 200 is located on the side opposite to the protruding portion 310 with respect to the convex portion 320 (return process). Thereafter, the tool spindle 130 is moved in the direction in which the cutting tip 200 approaches the workpiece 300 (direction D4 in the figure) in accordance with the depth of cut of the stroke of the next feeding process (cutting process).

[0023] By repeating the above-described feeding process, relieving process, returning process, and cutting process, when the cut (tooth) formed on the upper surface 322 of the convex portion 320 reaches a predetermined depth, the workpiece spindle 110 is rotated to perform rotational indexing of the workpiece 300. Then, by repeating the process from the feeding process to the cutting process again, the next tooth groove is cut. By repeating this, a gear is formed on the entire circumference of the convex portion 320.

[0024] As described above, according to the compound processing machine 100 of the present embodiment, a gear is formed on the outer peripheral surface of the workpiece 300 by cutting in the radial direction of the tool spindle 130. Thereby, a gear can be formed at a position adjacent to the protruding portion 310 without damaging the protruding portion 310. Therefore, it is possible to manufacture a high-quality and highly reliable product.

[0025] Also, in FIG. 3, a hollow workpiece 300 is illustrated. In the case of a hollow workpiece 300, if a gear is to be manufactured by forging, the workpiece 300 may be deformed. On the other hand, in the case of the compound processing machine 100 of the present embodiment, since it is cutting in the axial direction of the workpiece 300, no load is applied in the direction of crushing the hollow workpiece. Therefore, the compound processing machine 100 of the present embodiment can form a gear while preventing deformation of the hollow workpiece 300.

[0026] Note that the hollow workpiece 300 shown in Figure 3 is merely an example and is not limiting. The multi-tasking machine 100 of this embodiment can also be suitably used when manufacturing gears from solid workpieces.

[0027] Preferred embodiments of the present invention have been described above with reference to the attached drawings, but it goes without saying that the present invention is not limited to such examples. It will be obvious to those skilled in the art that various modifications or alterations can be conceived within the scope of the claims, and these will naturally also fall within the technical scope of the present invention. [Industrial applicability]

[0028] The present invention can be used as a composite machining center for forming gears adjacent to the protrusions of a long workpiece having protrusions. [Explanation of Symbols]

[0029] 100...Multi-tasking machine, 102...Fixed bed, 104...Control unit, 110...Workpiece spindle, 120...Tailstock, 130...Tool spindle, 200...Cutting tip, 210...Main body, 220...Cutting edge, 250...Holder, 250a...Tip mounting guide, 300...Workpiece, 302...Outer surface, 310...Protrusion, 320...Convex part, 322...Top surface

Claims

[Claim 1] A composite machining machine for forming a gear on the outer circumferential surface of a long workpiece having a protrusion on its outer circumferential surface, at a position adjacent to the protrusion in the longitudinal direction of the workpiece, A workpiece spindle that rotatably supports the aforementioned workpiece, A tool spindle is positioned perpendicular to the longitudinal direction of the workpiece and supports the tool, The cutting tip, which is the tool, is mounted on the axis of the tool spindle in a position to cut the workpiece in the radial direction, A control unit that controls the operation of the work spindle and the tool spindle, Equipped with, The control unit, A feeding process in which the workpiece is cut by relatively moving the workpiece spindle and the tool spindle in a direction that brings the cutting chip closer to the position in the workpiece where the gear is formed, A relief step is to move the tool spindle in a direction away from the workpiece to separate the cutting tip from the workpiece, A return step involves moving the workpiece spindle and the tool spindle relative to each other in the opposite direction to the feed step to return the cutting chip to its position before the feed step, A composite machining machine characterized by forming the gear at a position adjacent to the protruding portion by repeating a cutting step in which the cutting tip moves the tool spindle in a direction that brings it closer to the workpiece in accordance with the amount of cutting in the next feeding step.

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