Machine tool
Patent Information
- Authority / Receiving Office
- TW · TW
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-01-30
- Publication Date
- 2023-09-16
Smart Images
Figure TWG2TA000925328_001 
Figure TWG2TA000925328_002 
Figure TWG2TA000925328_003
Abstract
Description
[Technical Field]
[0001] Field of Invention
[0002] The present invention relates to a working machine having a platform device that can simultaneously achieve lightweight and improved chip removal while ensuring rigidity. [Previous Technology]
[0003] Background Technology
[0004] Patent Document 1 discloses a machining center (working machine) comprising: a base, a platform, a support, a spindle head, a spindle head, a spindle, an NC device, and an automatic tool changing device. A pair of linear guides are arranged on the base along the machine's longitudinal direction (Z-axis direction), and a platform platform, whose outer periphery is formed into a rectangular shape in plan view, is bridged between the pair of linear guides. The platform platform is configured to move along the tracks of the pair of linear guides, and the platform disposed on the upper surface side of the platform platform is configured to move along the Z-axis direction.
[0005] In such a machine tool, chips generated during the machining of a workpiece positioned on the stage tend to remain on the stage platform. Furthermore, while a rectangular stage platform is easier to rigidify, its weight increases. (Previous Art Documents, Patent Documents)
[0006] [Patent Document 1] International Publication No. 2020 / 089982 [Summary of the Invention]
[0007] Summary of the Invention Problem to be Solved by the Invention
[0008] In view of the above, the present invention aims to provide a working machine having a platform device that can simultaneously achieve lightweight design and improved chip removal while ensuring rigidity. Means for solving the problem
[0009] According to the present invention, a working machine is provided, which moves a tool relative to a workpiece and processes the workpiece, characterized in that it comprises: a base, which is the base of the working machine; and a platform device, which has: a platform for mounting the workpiece; a base body disposed on the upper surface of the base extending in all directions, and the platform disposed on the upper surface; and four legs, which are four legs that are separated from each other and connected to the base body, and are composed of a first leg extending towards the right front side of the base, a second leg extending towards the right rear side of the base, a third leg extending towards the left front side of the base, and a fourth leg extending towards the left rear side of the base. Effects of the Invention
[0010] According to the machine tool of the present invention, the platform device has four legs that are separated from each other and connected to the base body. Therefore, chips generated during the processing of a workpiece mounted on the platform can be discharged downwards through the space between the four legs, improving the chip removal performance of the machine tool. Furthermore, the four legs extend in their respective directions toward the right front, right rear, left front, and left rear of the base. Therefore, rigidity can be uniformly ensured for loads acting on the platform device from all directions. Moreover, by having four legs that are separated from each other, for example, compared to forming the platform device in a plate shape, the platform device can be lightweight while ensuring rigidity. Thus, it is possible to simultaneously achieve lightweight design of the machine tool's platform device and improved chip removal performance while ensuring rigidity.
Implementation Method
[0012] Form used to implement the invention
[0013] Hereinafter, with reference to the accompanying drawings, the working machinery of the relevant embodiments will be described. The same or corresponding elements will be given the same symbols, and repeated explanations will be omitted. For ease of understanding, the drawings may be described at a reduced scale.
[0014] Figure 1 shows, as an example, a working machine 10 configured as a vertical machining center according to this embodiment. In the figure, the machine's front-back direction, left-right direction, and up-down direction when the machine is positioned on a horizontal plane are indicated by arrows. In the figure, Z represents the machine's front-back direction (Z-axis direction), X represents the machine's left-right direction (X-axis direction), and Y represents the machine's up-down direction (Y-axis direction).
[0015] The machine tool 10 includes: a base 12 fixed to the ground of the factory as a platform; a platform device 14 disposed on the upper surface of the base 12 so as to be movable along the front-rear direction of the machine; a platform 36a disposed on the upper surface of the platform device 14; and a support column 18 erected on the upper surface of the base 12. The platform device 14 and the platform 36a disposed on its upper surface are configured as a rotating platform having one or two rotation axes. Furthermore, in FIG1, the illustration of the frame forming the outer periphery of the machine tool 10 is omitted.
[0016] In the horizontal plane, the side where the platform device 14 is arranged (the left side of FIG1) is called the front side of the machine, and the side where the support column 18 is erected (the right side of FIG1) is called the rear side of the machine. Furthermore, the right side when viewing the platform device 14 from the side of the support column 18 is called the right side of the machine (the upper side of FIG1), and the left side is called the left side of the machine (the lower side of FIG1).
[0017] The machine tool 10 includes a pair of Z-axis linear guide members 20 arranged along the Z-axis direction on the upper surface of the base 12 as guide members. The platform device 14 is connected to the carrier 22, which is mounted on the Z-axis linear guide members 20 as a mounting part, and is configured to move back and forth (linearly) together with the carrier 22 along the machine's front-to-back direction (Z-axis direction) using a Z-axis ball screw unit 120 including a motor and a ball screw.
[0018] The support column 18 is mounted on one of a pair of X-axis linear guide members 30 arranged on the upper surface side of the base 12 along the left-right direction (X-axis direction) of the machine, and is configured to reciprocate (linearly movable) along the X-axis direction using an X-axis ball screw unit 100 including a motor and a ball screw. Furthermore, the working machine 10 includes a saddle 24. The saddle 24 is mounted on one of a pair of Y-axis linear guide members 26 arranged on the front side of the support column 18 and on the upper surface side of the base 12 along the up-down direction (Y-axis direction) of the machine, and is configured to reciprocate (linearly movable) along the Y-axis direction using a Y-axis ball screw unit 110 including a motor and a ball screw.
[0019] A spindle head 32 protruding towards the front of the machine is installed in the saddle 24. The spindle head 32 supports the spindle 34 located at the front of the machine in a rotatable drive manner using a built-in servo motor (not shown). A tool (not shown) is installed at the front end of the spindle 34, and the workpiece (not shown) mounted on the stage 36a is machined using the tool. In order to perform a variety of machining operations, a tool holder or tool changing device can also be configured in the machine 10, so that the tool mounted on the spindle 34 can be changed.
[0020] Figure 2 shows a perspective view of the stage assembly 14. The stage assembly 14 includes a base body 36 on which a stage 36a (see Figure 1) is disposed on its upper surface, and four legs 40, 42, 44, and 46 that are separated from each other and connected to the base body 36. The stage 36a has a bracket 16 on which a workpiece is mounted. Alternatively, the workpiece may be mounted directly on the stage 36a.
[0021] The four legs 40, 42, 44, and 46 of the platform device 14 are composed of a first leg 40 extending towards the right front side of the machine, a second leg 42 extending towards the right rear side of the machine, a third leg 44 extending towards the left front side of the machine, and a fourth leg 46 extending towards the left rear side of the machine. These four legs 40, 42, 44, and 46 are separated from each other and extend in four separate directions. Therefore, as shown in the case where the four legs 40, 42, 44, and 46 extend in the same direction (e.g., the left-right direction or the front-back direction of the machine), high rigidity is ensured not only for loads from the extending direction, but also for loads from either the left-right direction or the front-back direction of the machine.
[0022] Furthermore, the four legs 40, 42, 44, and 46 form an X-shape in the plan view, constituting a symmetrical structure in both the front-rear and left-right directions of the machine. Therefore, the platform 36a and the platform assembly 14 can be supported with good balance. Moreover, the platform assembly 14 can uniformly ensure rigidity under loads acting from the front-rear and / or left-right directions of the machine. Alternatively, the four legs 40, 42, 44, and 46 can also be symmetrical in the plan view only in either the front-rear or left-right direction of the machine.
[0023] Four feet 40, 42, 44, and 46 extend downward from the base body 36. Therefore, rigidity can be ensured for the weight of the workpiece mounted on the stage 36a or the load borne by the tool during machining, which acts downward on the stage 36a and the stage device 14.
[0024] A right-side hole 48, serving as a hole, is formed through the machine in the vertical direction between the first foot 40 and the second foot 42. A left-side hole 50, also serving as a hole, is formed through the machine in the vertical direction between the third foot 44 and the fourth foot 46. Therefore, chips generated during workpiece machining can fall (discharge) to the lower side of the stage assembly 14 through the right-side hole 48 and the left-side hole 50. Furthermore, the four feet 40, 42, 44, and 46 extend outwards toward the stage 36a in the plan view. Therefore, chip retention in the four feet 40, 42, 44, and 46 (obstructing chip discharge) can be suppressed or prevented. Moreover, the stage can also be formed so as not to overlap with the right-side and left-side holes.
[0025] Each of the four feet 40, 42, 44, and 46 has an inclined surface 52 that is oriented downward toward the side of the right hole 48 or the left hole 50. Therefore, it is possible to facilitate the discharge of chips generated during workpiece processing through the underside of the right hole 48 or the left hole 50.
[0026] Figure 3 shows a cross-sectional view of the stage assembly 14 cut along the vertical and horizontal directions of the machine. A stage 36a is disposed on the upper side of the base body 36, and a bearing 54 is disposed on the lower side of the stage 36a. The base body 36 is formed in an inverted conical shape (mortar shape) in cross-section, with its outer periphery decreasing towards the lower side. Therefore, the right-side hole 48 or the left-side hole 50 can be enlarged towards the lower side of the stage assembly 14, which can promote the removal of chips generated during workpiece processing.
[0027] As shown in Figure 1, the ends of the four legs 40, 42, 44, and 46 on the Z-axis direct-drive guide 20 side are connected to the carriers 22, which are respectively arranged separately in the machine's front-to-back and left-to-right directions. Furthermore, the first leg 40 and the second leg 42, extending to the right front and right rear respectively, are connected in the Z-axis direct-drive guide 20 side via a connecting structure 60. The third leg 44 and the fourth leg 46, extending to the left front and left rear respectively, are connected in the Z-axis direct-drive guide 20 side via a connecting structure 60. This improves the rigidity of the platform assembly 14.
[0028] Also, although it is described that the first foot 40 is connected to the second foot 42 and the third foot 44 is connected to the fourth foot 46, it is not limited to this. It can also be a foot connection extending to the same front side of the right front side and the left front side, or a foot connection extending to the same rear side of the right rear side and the left rear side.
[0029] The space where the platform device 14 is installed is configured as a machining chamber 56. A conveyor belt 58 serving as a chip discharge section is arranged along the front-rear direction of the machine in the lower side of the platform device 14 within the machining chamber 56. Therefore, chips generated during workpiece processing can be discharged (fall) onto the conveyor belt 58 through the right-side hole 48 or the left-side hole 50. Furthermore, chips discharged onto the conveyor belt 58 can be moved by the conveyor belt 58 to the rear side of the machine 10 and discharged outside the machine 10. Moreover, since no oil tray or similar device is installed in the machining chamber 56, chip accumulation on the oil tray or similar device can be prevented. This improves the chip discharge performance of the machine 10.
[0030] Furthermore, in the following description, although the conveyor belt 58 is configured to be arranged on the lower side of the platform device 14, it is not limited to this. A chip discharge section may also be constructed by forming a concave groove on the lower side of the platform device in a way that can collect falling chips.
[0031] The four legs 40, 42, 44, and 46 are located between the base body 36 and the carrier 22 and are covered by a pair of shields 62 that divide the area between the machining chamber 56 on which the stage 36a is mounted and the Z-axis linear guide 20 (outside the machining chamber 56). The shields 62 are formed to tilt downwards towards the inside of the machining chamber 56. Therefore, it is possible to suppress or prevent chips generated during workpiece machining or coolant used in the stage assembly 14 from scattering and discharging to the outside of the machining chamber 56. The shields 62 are integrally mounted with the stage assembly 14 and move back and forth along with it when the stage assembly 14 moves back and forth in the machine's longitudinal direction (Z-axis direction). Corrugations or other structures may also be added to the portion of the shields 62 that covers the stage assembly 14 as needed. Furthermore, in order to prevent chips or coolant from flying outside the machining chamber 56, it will also be connected to other shields, but in Figure 1, in order to illustrate the structure of the Z-axis linear guide 20 or its surroundings, other shields are not shown.
[0032] Next, the function and effect of the working machine 10 of this embodiment will be explained below.
[0033] According to the machine tool 10 of this embodiment, the platform device 14 has four legs 40, 42, 44, and 46 that are separated from each other and connected to the base body 36. Furthermore, a right-side hole 48 is formed between the first leg 40 and the second leg 42 along the vertical direction of the machine, and a left-side hole 50 is formed between the third leg 44 and the fourth leg 46 along the vertical direction of the machine. Therefore, chips generated by the workpiece mounted on the platform 36a can be discharged (fallen) to the conveyor belt 58 through the right-side hole 48 and the left-side hole 50 between the legs 40, 42, 44, and 46, thereby improving the chip discharge performance of the machine tool 10.
[0034] Furthermore, according to the machine tool 10 of this embodiment, the four legs 40, 42, 44, and 46 extend toward the right front, right rear, left front, and left rear sides of the base 12, respectively. Therefore, the rigidity of the platform device 14 can be ensured for loads from either the left-right or front-back directions of the machine. Moreover, by having four mutually separated legs 40, 42, 44, and 46, for example, compared to forming the platform device into a plate shape, the platform device 14 can be constructed to be lightweight while uniformly ensuring rigidity. In this way, the rigidity of the platform device 14 can be ensured while simultaneously achieving a lightweight design.
[0035] Furthermore, according to the machine tool 10 of this embodiment, the four legs 40, 42, 44, and 46 are formed in an X-shape in the plan view, constituting a symmetrical structure in the front-rear direction and the left-right direction of the machine. Therefore, the platform device 14 can be supported with good balance, and the rigidity of the platform device 14 can be ensured for loads acting from the front-rear direction and / or the left-right direction of the machine.
[0036] Furthermore, according to the machine tool 10 of this embodiment, the four legs 40, 42, 44, and 46 extend downward from the base body 36. Therefore, rigidity can be ensured for the weight of the workpiece mounted on the platform 36a or the load from the tool during processing, which acts downward on the platform device 14.
[0037] Furthermore, according to the machine tool 10 of this embodiment, the four legs 40, 42, 44, and 46 extend outward toward the platform 36a in the plan view. Therefore, chip retention (obstruction of chip discharge) in the four legs 40, 42, 44, and 46 can be suppressed or prevented.
[0038] Furthermore, according to the machine tool 10 of this embodiment, each of the four legs 40, 42, 44, and 46 has an inclined surface 52 formed to be inclined downward on the side of the right hole 48 or the left hole 50. Therefore, it is possible to facilitate the discharge of chips generated by machining the workpiece downward through the right hole 48 or the left hole 50.
[0039] Furthermore, according to the machine tool 10 of this embodiment, the base body 36 is formed into an inverted cone shape (mortar shape) with its outer periphery becoming smaller as it moves downward. Therefore, as it moves downward toward the stage device 14, the right hole 48 or the left hole 50 can be enlarged, which can promote the removal of chips generated by the workpiece being processed.
[0040] Furthermore, according to the machine tool 10 of this embodiment, the four legs 40, 42, 44, and 46 are covered between the base body 36 and the carrier 22 by a pair of shields 62 that divide the sides of the machining chamber 56 and the Z-axis linear guide 20. The shields 62 are formed to tilt downwards towards the inside of the machining chamber 56. Therefore, it is possible to suppress or prevent the scattering and discharge of chips or coolant used in the stage device 14 generated during workpiece processing to the outside of the machining chamber 56.
[0041] Based on the above, the machine tool 10 of this embodiment can simultaneously achieve lightweight and improved chip removal while ensuring the rigidity of the platform device 14.
[0042] Although the above description pertains to an embodiment of the machine tool 10, the present invention is not limited to the above-described embodiment. Those skilled in the art will understand that various modifications of the above-described embodiment are possible. [Simplified Explanation of the Diagram]
[0011] FIG1 is a perspective view showing the working machine of the relevant embodiment of the present invention from the top side. FIG2 is a perspective view showing the platform device. FIG3 is a cross-sectional view showing the platform device cut along line AA shown in FIG2.
Claims
1. A working machine for moving a tool relative to a workpiece and processing the workpiece, characterized in that it comprises: a base, which is the base of the working machine; and a platform device having: a platform for mounting the workpiece; a base body disposed on the upper surface of the base extending in the front, back, left, and right directions, and the platform disposed on the upper surface; and four legs, which are four legs that are separated from each other and connected to the base body, and are composed of a first leg extending towards the right front side of the base, a second leg extending towards the right rear side of the base, a third leg extending towards the left front side of the base, and a fourth leg extending towards the left rear side of the base.
2. The machine tool as claimed in claim 1, wherein the aforementioned four legs are configured to be symmetrical in a plan view.
3. The working machine as claimed in claim 1 or 2, wherein the aforementioned platform device has a through hole formed between two legs extending toward the same side of the front and rear sides or the left and right sides among the aforementioned four legs, extending from the side of the aforementioned platform toward the upper surface side of the aforementioned base.
4. The working machine as claimed in any one of claims 1 to 3, wherein the aforementioned four legs extend from the aforementioned base body toward the lower side of the aforementioned platform device.
5. The machine tool as claimed in any of claims 1 to 4, wherein the aforementioned four legs are formed to extend outward toward the aforementioned platform in a plan view.
6. The working machine of any one of claims 1 to 5, wherein the aforementioned base body is formed such that the outer peripheral shape decreases as it moves downward.
7. The working machine as claimed in any of claims 1 to 6, wherein the lower side of the aforementioned platform device is provided with: a conveyor belt or a chip discharge section with grooves.
8. The working machine as described in any of claims 1 to 7, wherein each of the aforementioned four legs is connected to a separately configured mounting part.
9. The machine tool as claimed in claim 8, wherein the aforementioned mounting part is a carrier frame, which is mounted to allow linear movement of a guide member disposed on the upper surface side of the aforementioned base.
10. The machine tool as claimed in claim 9, wherein two of the aforementioned four legs, extending toward the same side toward the front and rear sides or the left and right sides, are connected in the side of the aforementioned carrier.
11. The machine tool as claimed in claim 9 or 10, wherein the aforementioned four legs are located between the aforementioned base body and the aforementioned carrier and are covered by a shield that divides the processing chamber side where the aforementioned platform is disposed and the side of the aforementioned guide member.
12. The machine tool as claimed in any of claims 1 to 11, wherein the aforementioned platform is a rotary platform having one or two rotation axes.