Composite processing machine

Abstract

The present invention provides a multi-tasking machine that can increase the rigidity of tool holding while reducing the time required to hold the tool in a double-supported position, thereby saving space. [Solution] The multi-tasking machine 100 includes a spindle indexing table 112 that rotates the tool spindle 110, a tailstock 118 that supports the tip 102b of the tool 102, a tailstock swivel table 116 that is arranged coaxially with the spindle indexing table and rotates the tailstock, and is rotatably supported relative to the spindle indexing table and body 114, a coupling 120 that connects or disconnects the rotation of the tailstock swivel table relative to the spindle indexing table, and a rotation stopper 122 that fixes or disconnects the rotation of the tailstock swivel table relative to the body. By connecting the coupling and releasing the rotation stopper, the tailstock swivel table and the spindle indexing table can rotate together, and by releasing the coupling and fixing the rotation stopper, only the spindle indexing table can rotate.

Description

Technical Field

[0001] The present invention relates to a machining center including a tool spindle for holding a tool.

Background Art

[0002] In a machining center, a tool (for example, a hob tool) for machining a workpiece is held by a tool spindle. A load is applied to the tool during machining of the workpiece. Therefore, particularly in the case of a tool having a long tool length or in machining where a load is applied in the radial direction of the tool such as a hob or a grinding wheel, if only one end is held by the tool spindle, that is, in a cantilever state, the tool may bend due to the load applied during machining, leading to a decrease in machining accuracy.

[0003] For example, in Patent Document 1, there is provided a first support portion (tool spindle) that rotatably supports a hob tool, and a second support portion (rotary support unit) that rotatably supports the side of the hob tool opposite to the side supported by the tool spindle. After attaching the hob tool to the tool spindle, the rotary support unit is attached to support the hob tool in a double-ended state. A tool support device is disclosed.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the tool support device of Patent Document 1, when attaching and detaching the rotary support unit, it is necessary to move the tool spindle base to the unit housing portion for housing the rotary support unit. Therefore, it takes time to change the hob tool from a cantilever state to a double-ended state, and furthermore, the size of the device increases.

[0006] Furthermore, because the rotary support unit that supports the opposite side of the hob tool is mounted on an external component of the tool headstock, the distance to the opposite side of the hob tool becomes longer, resulting in lower holding rigidity.

[0007] In view of these problems, the present invention aims to provide a composite machining center that can increase the holding rigidity of the tool, shorten the time required to hold the tool in a double-supported position, and save space. [Means for solving the problem]

[0008] To solve the above problems, a typical configuration of a multi-tasking machine according to the present invention includes a tool spindle, a spindle indexing table that rotates the tool spindle, a body into which the spindle indexing table is inserted, a tailstock that supports the tip of a tool held on the tool spindle, and a tailstock swivel table arranged coaxially with the spindle indexing table and for swiveling the tailstock, comprising: a tailstock swivel table rotatably supported with respect to the spindle indexing table and the body; a coupling that connects or disconnects the rotation of the tailstock swivel table with respect to the spindle indexing table; and a rotation stopper that fixes or disconnects the rotation of the tailstock swivel table with respect to the body. The tailstock swivel table and the spindle indexing table can be rotated together by connecting the coupling and releasing the rotation stopper, and only the spindle indexing table can be rotated by releasing the coupling and fixing the rotation stopper.

[0009] When the tailstock swivel table and the spindle indexing table are rotatable as a single unit, it is preferable that the drive source for the tailstock swivel table and the spindle indexing table be shared. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a multi-tasking machine that can increase the holding rigidity of the tool, reduce the time required to hold the tool in a double-supported state, and save space. [Brief explanation of the drawing]

[0011] [Figure 1] This is a diagram showing the overall structure of a multi-tasking machine according to an embodiment of the present invention. [Figure 2] Figure 1 shows the main components of a multi-tasking machine. [Figure 3] Figure 2 is a schematic diagram illustrating the coupling of a multi-tasking machine. [Figure 4] This diagram shows the operation of the multi-tasking machine shown in Figure 1. [Figure 5] This figure shows the operation of the multi-tasking machine, following Figure 4. [Modes for carrying out the invention]

[0012] 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 examples 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.

[0013] Figure 1 shows an overall view of the multi-tasking machine 100 in an embodiment of the present invention. The multi-tasking machine 100 is a machine tool that processes a workpiece (work 104) by rotating a tool 102. The tool 102 is, for example, a hob tool, and processes the workpiece 104 with its outer circumference 102a.

[0014] The multi-tasking machine 100 includes a work spindle 106 for gripping a workpiece 104, a tool changer 108, and a tool spindle 110, all mounted on a bed 105. The tool changer 108 is an ATC (Automatic Tool Changer) that automatically changes the tool 102, and mounts the tool 102 on the tool spindle 110.

[0015] FIG. 2 is a diagram showing a main part of the multi-task machine 100 of FIG. 1. In the figure, a part of the multi-task machine 100 is shown in cross section. The multi-task machine 100 includes a main spindle indexing table 112, a body 114, a tailstock swivel table 116, a tailstock 118, a coupling 120, and anti-rotation members 122 and 123.

[0016] First, an overview will be described. The body 114 is a non-rotating member. The main spindle indexing table 112 is rotated by a motor (not shown). The tailstock swivel table 116 rotates integrally with the main spindle indexing table 112 by being connected by the coupling 120.

[0017] The main spindle indexing table 112 is a table that rotates the tool spindle 110, and has a large-diameter portion 112a formed on the tool spindle 110 side and a small-diameter portion 112b continuous with the large-diameter portion 112a. The body 114 inserts the small-diameter portion 112b of the main spindle indexing table 112 as shown in the figure.

[0018] A bearing 124a is disposed between the small-diameter portion 112b of the main spindle indexing table 112 and the inner peripheral surface 114a of the body 114. The main spindle indexing table 112 is rotatably supported with respect to the body 114 via the bearing 124a.

[0019] The tailstock swivel table 116 is a table disposed coaxially with the main spindle indexing table 112 and rotates the tailstock 118. The tailstock 118 stands on an extension portion 116a of the tailstock swivel table 116 and supports the tip 102b of the tool 102 (the free end of the tool 102 on the side opposite to the root side held by the tool spindle 110) as shown in FIG. 1.

[0020] The tailstock swivel table 116 also has a top surface portion 117a and a cylindrical portion 117b. The top surface portion 117a faces the large-diameter portion 112a of the main spindle indexing table 112. The cylindrical portion 117b of the tailstock swivel table 116 faces the outer peripheral surface 114b of the body 114.

[0021] Furthermore, a bearing 124b is disposed between the cylindrical portion 117b of the tailstock turntable 116 and the outer peripheral surface 114b of the body 114. The tailstock turntable 116 is rotatably supported with respect to the body 114 and the spindle indexing table 112 via the bearing 124b.

[0022] FIG. 3 is a schematic diagram for explaining the coupling 120 of the composite machining machine 100 in FIG. 2. The coupling 120 constitutes a curvic coupling and connects or releases the rotation of the tailstock turntable 116 with respect to the spindle indexing table 112.

[0023] Specifically, the coupling 120 has an annular coupling member 121 housed in the body 114. Among the large-diameter portions 112a of the spindle indexing table 112, a tooth portion 112c including a plurality of concavities and convexities in the circumferential direction is formed on the surface facing the coupling member 121. Among the top surfaces 117a of the tailstock turntable 116, a tooth portion 117c including a plurality of concavities and convexities in the circumferential direction is formed on the surface facing the coupling member 121.

[0024] Since the large-diameter portion 112a of the spindle indexing table 112 and the top surface 117a of the tailstock turntable 16 face each other, as shown in FIG. 3, the tooth portion 112c of the spindle indexing table 112 and the tooth portion 117c of the tailstock turntable 116 are adjacent to each other. Among the coupling member 121, a tooth portion 121a including a plurality of concavities and convexities in the circumferential direction is formed on the surface facing the tooth portion 112c and the tooth portion 117c.

[0025] The tooth portion 121a of the coupling member 121 is formed so as to fit into the tooth portion 112c of the spindle indexing table 112 and the tooth portion 117c of the tailstock turntable 116. Further, the coupling member 121 is movable in the directions indicated by the arrows Xa and Xb in FIG. 2 (the directions of protruding from or being drawn into the body 114) by hydraulic pressure or the like.

[0026] As a result, when the coupling member 121 protrudes in the direction indicated by arrow Xa, the teeth 121a engage with the teeth 112c and 117c, connecting the large-diameter portion 112a of the spindle indexing table 112 and the top surface portion 117a of the tailstock swivel table 116. Consequently, the rotation of the tailstock swivel table 116 relative to the spindle indexing table 112 is linked, and the tailstock swivel table 116 and the spindle indexing table 112 can rotate together via the coupling 120. When the tailstock swivel table 116 and the spindle indexing table 112 rotate, the coupling member 121 also rotates within the body 114.

[0027] Furthermore, when the coupling member 121 is retracted in the direction indicated by arrow Xb, the engagement between the teeth 121a and the teeth 112c and 117c is released, and the connection between the large diameter portion 112a of the spindle indexing table 112 and the top surface portion 117a of the tailstock swivel table 116 is released. As a result, the rotation of the tailstock swivel table 116 relative to the spindle indexing table 112 is released, and only the spindle indexing table 112 becomes rotatable relative to the tailstock swivel table 116, as shown by arrow R.

[0028] The anti-rotation device 122 shown in Figure 2 locks or releases the rotation of the tailstock swivel table 116 relative to the body 114. The anti-rotation device 122 primarily locks the rotation when the tailstock swivel table 116 is in the retracted position, as shown in Figure 4(a). Specifically, the anti-rotation device 122 is located inside the body 114 and is movable in the directions indicated by arrows Ya and Yb (directions in which it protrudes from or retracts from the body 114). When the anti-rotation device 122 moves in the direction indicated by arrow Ya, the tip 122a of the anti-rotation device 122 protrudes from the outer circumferential surface 114b of the body 114 and is inserted into the groove 117d of the cylindrical portion 117b of the tailstock swivel table 116. As a result, the rotation of the tailstock swivel table 116 is fixed relative to the body 114.

[0029] Furthermore, when the anti-rotation device 122 moves in the direction indicated by arrow Yb, the tip 122a of the anti-rotation device 122 is disengaged from the groove 117d of the tailstock swivel table 116. As a result, the tailstock swivel table 116 is released from rotation relative to the body 114 and becomes rotatable relative to the body 114.

[0030] Therefore, in the multi-tasking machine 100, by connecting the coupling 120 and releasing the anti-rotation device 122, the tailstock swivel table 116 and the spindle indexing table 112 can rotate together with respect to the body 114. At this time, the tailstock swivel table 116 rotates via the coupling 120 using the driving force of the spindle indexing table 112's drive motor (not shown). As a result, the drive source for the tailstock swivel table 116 and the spindle indexing table 112 is shared, which allows for space saving.

[0031] In addition, in the multi-tasking machine 100, by releasing the coupling 120 and fixing the anti-rotation device 122, the rotation of the tailstock swivel table 116 relative to the body 114 is fixed, while only the spindle indexing table 112 can rotate relative to the tailstock swivel table 116.

[0032] The anti-rotation device 123 shown in Figure 2 fixes or releases the rotation of the coupling member 121 relative to the body 114. The anti-rotation device 123 is located inside the body 114 and is movable in a direction that allows it to protrude toward the coupling member 121 or to be withdrawn from the coupling member 121.

[0033] The following describes the operation of the multi-tasking machine 100 in which the tailstock 118 is replaced with a tool 102 that requires it, and the tool 102 is moved to the machining position. Figure 4 is a diagram showing the operation of the multi-tasking machine 100 shown in Figure 1. Figures 4(b) and 4(d) are cross-sectional views AA and BB of Figure 4(a) and Figure 4(c), respectively.

[0034] As a prerequisite, the tailstock swivel table 116 is positioned in the retracted position (non-interference position) shown in Figure 4(a) so that the tailstock 118 does not interfere with machining other than hob tools or tool changes. At this time, the anti-rotation device 122 is inserted into the groove 117d of the tailstock swivel table. The coupling 120 is released. When the coupling 120 is released, the anti-rotation device 123 protrudes toward the coupling member 121, fixing the rotation of the coupling member 121.

[0035] As shown in Figure 4(a), when changing to tool 102 (hob tool), if a load is applied to the tailstock swivel table 116, the anti-rotation device 122 may deform or malfunction. Therefore, as shown by arrow Xa in Figure 4(b), the coupling 120 is connected, and as shown by arrow Yb, the anti-rotation device 122 is released. Furthermore, after connecting the coupling 120, the anti-rotation device 123 is removed from the coupling member 121, and the anti-rotation device 123 is released. In other words, the rotation of the tailstock swivel table 116 is fixed by the spindle indexing table 112 instead of the anti-rotation device 122. Then, as shown by arrow F, the tool 102 is attached to the tool spindle 110 by the tool changer 108.

[0036] Next, the anti-rotation device 122 is fixed in place as shown by arrow Ya in Figure 4(d). Furthermore, the anti-rotation device 123 is extended toward the coupling member 121 (inserting the anti-rotation device 123) as shown by the arrow in Figure 4(d) to fix the rotation of the coupling member 121 relative to the body 114. Then, the coupling 120 is released by moving it to arrow Xb as shown in Figure 4(d). Finally, only the spindle indexing table 112 is rotated in the direction of arrow Ra as shown in Figures 4(c) and 4(d) so that the tool spindle 110 faces the tool changer 108.

[0037] Figure 5 shows the operation of the multi-tasking machine 100 following Figure 4. Figures 5(b) and 5(d) are cross-sectional views of Figure 5(a) (CC) and Figure 5(c) (DD), respectively.

[0038] As shown in Figure 4(c), with the tool 102 and tailstock 118 facing each other, the coupling 120 is connected as indicated by arrow Xa in Figure 5(b), and the anti-rotation device 122 is released as indicated by arrow Yb. Furthermore, after connecting the coupling 120, the anti-rotation device 123 is released.

[0039] This fixes the rotation of the tailstock swivel table 116 with the spindle indexing table 112 instead of the stopper 122. Then, as shown in Figures 5(a) and 5(b), the tailstock 118 is extended to hold the tip 102b of the tool 102.

[0040] Subsequently, as shown by arrow Rb in Figures 5(c) and 5(d), the spindle indexing table 112 and the tailstock rotation table 116 are rotated integrally with respect to the body 114 to move the tool 102 to the machining position. If the tool 102 does not require the tailstock 118, the machine moves directly from the state shown in Figures 4(a) and 4(b) to the state shown in Figures 5(c) and 5(d) to move the tool 102 to the machining position.

[0041] In this way, with the multi-tasking machine 100, the tool spindle 110 can be brought into contact with the tailstock 118 of the tailstock swivel table 116 simply by rotating the spindle indexing table 112 (see arrow Ra in Figures 4(c) and 4(d)). Then, with the two facing each other, the tip 102b of the tool 102 held on the tool spindle 110 can be held by the tailstock 118 (see Figures 5(a) and 5(b)), thereby allowing the tool 102 to be held in a double-supported position and further increasing the holding rigidity of the tool 102.

[0042] Furthermore, in the multi-tasking machine 100, there is no need to move the tool spindle 110 to another location (for example, the unit housing section in Patent Document 1), so the time required to hold the tool 102 in a double-supported position can be reduced, and the size of the device does not increase, thus saving space.

[0043] 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 these 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]

[0044] The present invention can be used as a multi-tasking machine equipped with a tool spindle for holding a tool. [Explanation of Symbols]

[0045] 100...Multi-tasking machine, 102...Tool, 102a...Outer circumference of tool, 102b...Tip of tool, 104...Workpiece, 105...Bed, 106...Workpiece spindle, 108...Tool changer, 110...Tool spindle, 112...Spindle indexing table, 112a...Large diameter section of spindle indexing table, 112b...Small diameter section of spindle indexing table, 112c...Teeth section of spindle indexing table, 114...Body, 114a...Inner surface of body, 114b...Outer surface of body, 116...Tailstock swivel table, 1 16a... Extension of the tailstock swivel table, 117a... Top surface of the tailstock swivel table, 117b... Cylinder portion of the tailstock swivel table, 117c... Teeth of the tailstock swivel table, 117d... Groove of the tailstock swivel table, 118... Tailstock, 120... Coupling, 121... Coupling member, 121a... Teeth of the coupling member, 122, 123... Anti-rotation devices, 122a... Tip of the anti-rotation device, 124a, 124b... Bearings

Claims

1. Tool spindle and A spindle indexing table that rotates the tool spindle, A body that inserts the aforementioned spindle indexing table, A tailstock that supports the tip of the tool held on the tool spindle, A tailstock rotation table, which is arranged coaxially with the spindle indexing table and rotates the tailstock, comprising: a tailstock rotation table rotatably supported with respect to the spindle indexing table and the body; A coupling for connecting or disconnecting the rotation of the tailstock swivel table relative to the spindle indexing table, The tailstock swivel table is equipped with a stopper for fixing or releasing its rotation relative to the body, The coupling is connected and the anti-rotation mechanism is released, allowing the tailstock swivel table and the spindle indexing table to rotate together as a single unit. A multi-tasking machine characterized in that the coupling is released and the anti-rotation device is fixed, allowing only the spindle indexing table to rotate.

2. The multi-tasking machine according to claim 1, characterized in that when the tailstock swivel table and the spindle indexing table are rotatable as a single unit, the drive source for the tailstock swivel table and the spindle indexing table is shared.

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