Composite processing machine

Abstract

To provide a composite working machine in which a tailstock unit can be moved without requiring a large power source and which can therefore materialize miniaturization as an entire device.SOLUTION: The composite working machine according to the present invention comprises: a tool spindle 110 to which a tool 112 is fitted in a replaceable manner; a workpiece spindle 120 to which a workpiece W is fitted in a replaceable manner; a Z-axis drive mechanism 140 which moves the workpiece spindle 120 in a Z-axis direction being a rotational axis direction of the workpiece W; a tailstock unit 130 which can move in the Z-axis direction; a pilot bar 160 which connects the workpiece spindle 120 and the tailstock unit 130 to each other in such a manner that relative spacing in the Z-axis direction between the workpiece spindle 120 and the tailstock unit 130 can be changed; and a clamp drive source 170 that moves the pilot bar 160 forward and backward in the Z-axis direction to change the above relative spacing.SELECTED DRAWING: Figure 1

Description

【Technical Field】 【0001】 The present invention relates to a composite machine tool having a tool spindle, a work spindle, and a tailstock unit. 【Background Art】 【0002】 In recent years, for example, a composite machine tool in which a device capable of turning, such as a NC lathe, and a device capable of drilling and gear skiving are integrated has been put into practical use. In the composite machine tool, the workpiece may be held by the work spindle and the tailstock. 【0003】 As an example of holding a workpiece by a work spindle and a tailstock, although it is not strictly a composite machine tool, for example, Patent Document 1 discloses a lathe having "a bed, a headstock mounted on the bed, a linear guide rail disposed on the bed, a carriage having a tool post guided by the guide rail, a tailstock guided by the linear guide rail, and means for driving the carriage". 【0004】 The tailstock of the lathe of Patent Document 1 has a linear guide block engaged with the linear guide rail, a hydraulic device for raising and lowering the linear guide block, and a surface that abuts on the linear guide rail. In Patent Document 1, it is stated that the tailstock is guided by the linear guide rail only by the linear guide block during movement, and the tailstock is pushed out onto the upper surface of the linear guide rail by the hydraulic device during clamping. 【Prior Art Documents】 【Patent Documents】 【0005】 【Patent Document 1】 Japanese Patent Application Laid-Open No. 2003-080404 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0006】 In Patent Document 1, the tailstock is moved in the Z-axis direction by controlling the movement of a tool post that is movable in the rotation axis direction of the workpiece spindle (hereinafter referred to as the Z-axis direction). However, the tool post, or tool axis, requires high rigidity to obtain high machining accuracy and is extremely heavy. Therefore, moving such a heavy tool axis naturally requires a large power source. For this reason, the entire lathe in Patent Document 1 inevitably becomes large. 【0007】 In view of these problems, the present invention aims to provide a multi-tasking machine that can move the tailstock unit without requiring a large power source, thereby enabling miniaturization of the entire device. [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 to which a tool can be interchangeably mounted, a work spindle to which a workpiece can be interchangeably mounted, a Z-axis drive mechanism for moving the work spindle in the Z-axis direction, which is the rotation axis direction of the workpiece, a tailstock unit that can move in the Z-axis direction, a pilot bar that connects the work spindle and the tailstock unit so as to be able to change the relative distance in the Z-axis direction, and a clamp drive source that moves the pilot bar forward and backward in the Z-axis direction to change the relative distance. [Effects of the Invention] 【0009】 According to the present invention, it is possible to provide a multi-tasking machine that can move the tailstock unit without requiring a large power source, thereby enabling miniaturization of the entire device. [Brief explanation of the drawing] 【0010】 [Figure 1] This diagram schematically shows the overall configuration of the multi-tasking machine according to this embodiment. [Figure 2] This figure shows the unclamped state of the workpiece in the multi-tasking machine shown in Figure 1. [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 showing the overall configuration of the multi-tasking machine 100 according to this embodiment. Figure 2 is a diagram showing the unclamped state of the workpiece in the multi-tasking machine of Figure 1. Figure 1 is an example diagram showing the multi-tasking machine 100 with the workpiece W in a clamped state. Figure 2 is an example diagram showing the multi-tasking machine 100 with the workpiece W in an unclamped state. 【0013】 As shown in Figures 1 and 2, the multi-tasking machine 100 of this embodiment comprises a tool spindle 110, a workpiece spindle 120, and a tailstock unit 130. A tool 112 is interchangeably mounted on the tool spindle 110. The tool spindle 110 is rotatable in direction B. The tool spindle 110 is also movable in the X-axis direction (forward and backward direction in the figure) and the Y-axis direction (up and down direction in the figure), and is pivotable in direction A (rotation around an axis parallel to the center of the X axis). 【0014】 A workpiece W is interchangeably mounted on the workpiece spindle 120. The workpiece spindle 120 is rotatable in the C direction and can also move in the Z-axis direction (left-right direction in the figure; hereinafter simply referred to as the Z-axis direction), which is the rotation axis R direction of the workpiece W, by a Z-axis drive mechanism 140 described later. In this embodiment, the workpiece spindle 120 is fixed to a Z-axis table 102 located below it. 【0015】 The tailstock unit 130 is a device for clamping or unclamping the workpiece W and is movable in the Z-axis direction. A tailstock center 132 is provided on the surface of the tailstock unit 130 facing the workpiece W so as to press the workpiece W against the workpiece spindle 120. In this embodiment, as shown in Figure 1, the multi-tasking machine 100 clamps the workpiece W attached to the workpiece spindle 120 with the tailstock unit 130, and then processes the workpiece W with a tool attached to the tool spindle 110. 【0016】 Furthermore, the multi-tasking machine 100 of this embodiment includes a Z-axis drive mechanism 140, a first rail 152, a second rail 154 (as described later, the first rail 152 and the second rail 154 may be continuous and integrated), a pilot bar 160, and a clamp drive source 170. The Z-axis drive mechanism 140 is composed of a Z-axis drive motor 142 and a Z-axis drive ball screw 144, and moves the workpiece spindle 120 (Z-axis table 102) in the Z-axis direction of the workpiece W. 【0017】 The Z-axis drive motor 142 is a drive source for rotating the Z-axis drive ball screw 144, which is provided along the Z-axis direction, and is fixed on the bed 104. One end of the Z-axis drive ball screw 144 is fixed to the Z-axis drive motor 142, and the other end is fixed to a stopper 146 located on the bed 104. 【0018】 The first rail 152 is positioned on the bed 104 and guides the movement of the workpiece spindle 120 in the Z-axis direction. The second rail 154 is positioned on the bed 104 and guides the movement of the tailstock unit 130 in the Z-axis direction. 【0019】 The pilot bar 160 is a member that connects the work spindle 120 and the tailstock unit 130 in a manner that allows the relative distance therebetween in the Z-axis direction to be changed freely. Thereby, the work spindle 120 is connected to the tailstock unit 130 via the Z-axis table 102 by the pilot bar 160. Therefore, when the work spindle 120 moves, the tailstock unit 130 moves in the same direction following the work spindle 120. 【0020】 The clamp drive source 170 changes the relative distance between the work spindle 120 and the tailstock unit 130 by advancing and retracting the pilot bar 160. Examples of the clamp drive source 170 include, but are not limited to, a hydraulic cylinder and a motor, and other known devices may also be used. 【0021】 Hereinafter, the operation of the multi-tasking machine 100 shown in FIGS. 1 and 2 will be described. In the multi-tasking machine 100 of the present embodiment, the work spindle 120 is moved in the Z-axis direction of the work W by the Z-axis drive mechanism 140, and the relative distance between the work spindle 120 and the tailstock unit 130 is changed by the clamp drive source 170, whereby the work W is clamped or unclamped. 【0022】 Specifically, as shown in FIG. 1, in a state where the work W is clamped, the work W is attached to the work spindle 120 and is clamped between them by being biased in the direction of arrow D1 by the center punch 132 of the tailstock unit 130. 【0023】 In the multi - processing machine 100 of the present embodiment, when machining the workpiece W, first, the Z - axis drive motor 142 is driven. As a result, the Z - axis drive ball screw 144 rotates, causing the Z - axis table 102 to travel on the first rail 152, and thus the workpiece spindle 120 moves in the Z - axis direction. Since the workpiece spindle 120 is connected to the tailstock unit 130 by the pilot bar 160, the tailstock unit 130 follows the workpiece spindle 120 and travels on the second rail 154 to move in the Z - axis direction. As a result, the workpiece spindle 120 and the tailstock unit 130 move in the Z - axis direction while clamping the workpiece W, and the workpiece W moves relative to the tool 112 attached to the tool spindle 110. 【0024】 According to the above configuration, the tailstock unit 130 can be moved in conjunction with the workpiece spindle 120 by the Z - axis drive motor 142, which is the power source for moving the workpiece spindle 120. Therefore, compared with the case of providing a drive source in the Z - axis direction for the tool spindle 110 as in the prior art, the workpiece spindle 110 and the tailstock unit 130 can be moved without requiring a large power source. Thus, it is possible to miniaturize the multi - processing machine 100. 【0025】 When unclamping the workpiece W, such as when replacing the workpiece W, first, the clamp drive source 170 is driven. As a result, the pilot bar 160 advances toward the tailstock unit 130. In other words, the tailstock unit 130 is biased in the direction (D2 direction) away from the workpiece spindle 120 by the pilot bar 160 and travels on the second rail 154. As a result, as shown in FIG. 2, the center rest 132 of the tailstock unit 130 is separated from the workpiece W, and the workpiece W is in an unclamped state. 【0026】 Once the workpiece replacement and other operations are complete, the clamp drive source 170 is driven again. The pilot bar 160 is then retracted toward the workpiece spindle 120. As a result, the tailstock unit 130 is biased by the pilot bar 160 toward the workpiece spindle 120 (direction D1) and travels along the second rail 154. Consequently, as shown in Figure 1, the tailstock center 132 of the tailstock unit 130 comes into contact with the workpiece W, and the workpiece W is clamped. 【0027】 As described above, with the multi-tasking machine 100 of this embodiment, the relative distance between the workpiece spindle 120 and the tailstock unit 130 can be changed by moving the pilot bar 160 forward and backward using the clamp drive source 170. Therefore, clamping and unclamping of the workpiece W can be easily performed. 【0028】 Furthermore, the pilot bar 160 is threaded, and the tailstock unit 130 is adjustable relative to the pilot bar 160. This allows the tailstock unit 130 to be roughly positioned according to the size of the workpiece W, and the clamp drive source 170 to perform clamping and unclamping with a short stroke. 【0029】 In this embodiment, the composite machining center 100 is shown as having a configuration in which the first rail 152 and the second rail 154 are separate components, but the invention is not limited to this configuration. The same effects can be obtained even if the first rail 152 and the second rail 154 are integrated into a single unit. 【0030】 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] 【0031】 The present invention can be used as a multi-tasking machine equipped with a tool spindle, a workpiece spindle, and a tailstock unit. [Explanation of symbols] 【0032】 100...Multi-tasking machine, 102...Z-axis table, 104...Bed, 110...Tool spindle, 112...Tool, 120...Workpiece spindle, 130...Tailstock unit, 132...Tailstock center, 140...Z-axis drive mechanism, 142...Z-axis drive motor, 144...Z-axis drive ball screw, 146...Stopper, 152...First rail, 154...Second rail, 160...Pilot bar, 170...Clamp drive source, R...Rotation axis, W...Workpiece

Claims

[Claim 1] A tool spindle on which tools can be attached interchangeably, A workpiece spindle that allows for interchangeable workpiece mounting, A Z-axis drive mechanism moves the workpiece spindle in the Z-axis direction, which is the rotation axis direction of the workpiece. A tailstock unit that is movable in the Z-axis direction, A pilot bar connects the workpiece spindle and the tailstock unit so that their relative distance in the Z-axis direction can be changed. A clamp drive source that clamps or unclams the workpiece by moving the pilot bar back and forth in the Z-axis direction to change the relative distance, The bed serves as the base, A rail positioned on the bed and guiding the movement of the workpiece spindle and the tailstock unit in the Z-axis direction, Equipped with, The Z-axis drive mechanism and the clamp drive source are located on the opposite side of the tailstock unit from the workpiece spindle, A multi-tasking machine characterized in that the pilot bar is threaded and the tailstock unit is adjustable relative to the pilot bar.

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