Multi-station flexible machining center

Abstract

The present application relates to a kind of multi-station flexible machining center, including base, center turntable, several groups of clamping mechanism and several numerical control machining units, center turntable is rotatably connected on base;Each numerical control machining unit one-to-one corresponds to a machining station, the number of clamping mechanism is more than numerical control machining unit by one;Clamping mechanism can clamp workpiece and drive workpiece to rotate around vertical axis, to drive the side of workpiece to be processed towards corresponding numerical control machining unit;Fixed frame is provided on base, and fixed frame is provided with several tool magazines for tool changing, and tool magazine is one-to-one corresponding with each numerical control machining unit Setting. By setting clamping mechanism, so that the orientation of workpiece can be changed, so that each side of workpiece can be oriented towards numerical control machining unit as needed. And by setting tool magazine, so that numerical control machining unit can replace the required tool in tool magazine, expand the workpiece type processed by the present application.

Description

Technical Field

[0001] This invention relates to the field of machining, specifically to a multi-station flexible machining center. Background Technology

[0002] Most commonly known CNC machine tools have only one function; for example, lathes only have turning capabilities, milling machines only have milling capabilities, and drilling machines only have drilling capabilities. However, a workpiece usually requires multiple machining operations depending on the processing requirements. Since the machining position and angle of each operation are different, machining with ordinary CNC machine tools requires multiple employees and multiple machine tools. After completing one operation on one machine tool, the workpiece needs to be removed and transferred to another machine tool for clamping and positioning. Such multiple clamping and positioning not only increases the workload and reduces processing efficiency, but also affects the machining accuracy because the clamping and positioning cannot be guaranteed to be exactly the same each time.

[0003] For example, Chinese patent CN202742144U discloses a central turntable on which multiple workpieces are mounted. As the turntable rotates, the workpieces are sequentially stopped at various stations around the turntable, and CNC machining units on the outer side of each station perform machining on the workpieces. However, traditional fixtures only allow the radially outward side of the workpiece to face the CNC machine tool, while the part facing the center of the turntable cannot be machined. The workpiece needs to be removed and re-clamped to be machined.

[0004] Furthermore, each CNC machining unit is equipped with only one cutting tool, which limits the types of workpieces that can be processed.

[0005] In view of this, the inventor conducted in-depth research on the aforementioned deficiencies in the prior art, which led to the creation of this case. Summary of the Invention

[0006] The main objective of this invention is to provide a multi-station flexible machining center that solves the problems mentioned in the background art, such as the inability to machine the inward-facing side of the workpiece and the limitation on the types of workpieces due to the fact that each CNC machining unit has only one tool.

[0007] To achieve the above objectives, the solution of the present invention is:

[0008] A multi-station flexible machining center includes a base, a central turntable, several sets of clamping mechanisms disposed on the central turntable, and several CNC machining units disposed outside the central turntable. The central turntable is rotatably connected to the base. Each CNC machining unit corresponds to a machining station. The number of clamping mechanisms is one more than the number of CNC machining units. Each clamping mechanism can clamp a workpiece and drive the workpiece to rotate around a vertical axis, so that the side of the workpiece to be machined faces the corresponding CNC machining unit. A fixed frame is provided on the base, and several tool magazines for tool changing are provided on the fixed frame. Each tool magazine corresponds to one CNC machining unit.

[0009] Furthermore, the central turntable is fixedly mounted on the intermittent divider, and the intermittent divider is fixedly mounted on the base.

[0010] Furthermore, the tool magazine includes an outer cover and a tool turntable located inside the outer cover. Tool clips are evenly spaced on the tool turntable, and tools are mounted on the tool clips.

[0011] Furthermore, the CNC machining unit includes a radial moving mechanism, a transverse moving mechanism, a vertical moving mechanism, and a spindle; the spindle is mounted on the vertical moving mechanism, the radial moving mechanism is mounted on the base, and the transverse moving mechanism is disposed between the radial moving mechanism and the vertical moving mechanism; the spindle moves in three dimensions in space under the combined drive of the radial moving mechanism, the transverse moving mechanism, and the vertical moving mechanism.

[0012] Furthermore, a central cylinder is provided in the center of the central turntable; a slide rail is provided on the side wall of the central cylinder in a vertical direction; each clamping mechanism includes a lower turntable and an upper turntable; the upper turntable can move up and down along the slide rail; a lower turntable is rotatably connected to the upper end of the lower turntable, the lower turntable is fixedly connected to the central turntable, a control motor is connected to the side of the lower turntable, and the lower turntable is driven by the control motor; an upper turntable is rotatably connected to the lower end of the upper turntable; the rotation axes of the upper turntable and the lower turntable are coaxially arranged, and the workpiece is clamped between the upper turntable and the lower turntable.

[0013] Furthermore, a first cylinder and a second cylinder are provided on both sides of the upper turntable. The lower ends of the piston rods of the first cylinder and the second cylinder are connected to stop blocks, which can be embedded into the annular groove at the upper end of the upper turntable.

[0014] Furthermore, the upper turntable is fixedly mounted on the lifting seat, and the lifting seat is provided with a slider for sliding connection with the slide rail.

[0015] Furthermore, an annular plate is provided on the side wall of the central cylinder, and a lifting cylinder is provided on the annular plate. An extension rod is provided at the lower end of the piston rod of the lifting cylinder, and the extension rod is connected to the lifting seat.

[0016] Furthermore, the upper surface of the base is provided with a slope, and the lowest point of the slope is the debris discharge outlet.

[0017] Furthermore, the front of the base is provided with a recessed portion, which corresponds to the loading and unloading station.

[0018] With the above structure, the multi-station flexible machining center of the present invention has at least the following beneficial effects:

[0019] First, by setting up a clamping mechanism, the workpiece can be driven to rotate around a vertical axis, allowing the workpiece's orientation to be changed during machining station switching and within the same machining station, ensuring that each side of the workpiece faces the CNC machining unit as needed. Furthermore, by setting up a tool magazine, the CNC machining unit can change the required tools from the tool magazine, expanding the types of workpieces that can be processed by this invention.

[0020] 2. When changing tools, the CNC machining unit first moves the tool into the tool holder and then disengages it. The tool turntable rotates to move the required tool to the tool change position, and the CNC machining unit removes the required tool from the tool holder.

[0021] Third, the workpiece is clamped between the upper and lower turntables, and its orientation is controlled by the control motor of the lower turntable. By providing a first and a second cylinder, when the first and second cylinders extend, the stop block abuts against the annular groove of the upper turntable, thus restricting the rotation of the upper turntable and consequently restricting the rotation of the workpiece. This makes the CNC machining unit more stable when machining the workpiece.

[0022] Fourth, the ramp on the base allows debris generated during processing to more easily slide down to the debris discharge port. The recessed part on the side of the base makes it easier for workers to remove processed workpieces and place workpieces to be processed at the loading and unloading stations. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of a multi-station flexible machining center according to the present invention.

[0024] Figure 2 This is a three-dimensional exploded view of the tool magazine when it is separated from the base.

[0025] Figure 3 This is an exploded structural diagram of the base, CNC machining unit, and tool magazine.

[0026] Figure 4 A three-dimensional structural diagram showing several sets of clamping mechanisms set on a central turntable.

[0027] Figure 5 A three-dimensional structural diagram showing the dividing platform positioned at the lower end of the central turntable.

[0028] Figure 6 This is a three-dimensional structural diagram of the lifting platform, upper turntable, and upper turntable.

[0029] Figure 7 This is a three-dimensional structural diagram of a CNC machining unit.

[0030] Figure 8 This is a three-dimensional structural diagram of the tool magazine on the fixed frame.

[0031] Figure 9 This is a three-dimensional structural diagram of the tool magazine's tool turntable and tool holder.

[0032] In the picture:

[0033] Base 1; ramp 11; recess 12; fixed frame 13; tool magazine 14; outer cover 141; tool turntable 142; tool holder 143; center turntable 2; intermittent divider 21; center cylinder 22; dust cover 221; annular plate 222; lifting cylinder 23; extension rod 231; clamping mechanism 4; lower turntable 41; lower turntable 42; control motor 421; upper turntable 43; upper turntable 44; annular groove 441; first cylinder 451; second cylinder 452; stop block 453; lifting seat 46; slider 461; CNC machining unit 5; radial movement mechanism 51; transverse movement mechanism 52; up and down movement mechanism 53; spindle 54. Detailed Implementation

[0034] To further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0035] like Figures 1 to 9 As shown, this invention relates to a multi-station flexible machining center, comprising a base 1, a central turntable 2, several sets of clamping mechanisms 4 disposed on the central turntable 2, and several CNC machining units 5 disposed on the outer side of the central turntable 2. The central turntable 2 is rotatably connected to the base 1. Each CNC machining unit 5 corresponds to one machining station. The number of clamping mechanisms 4 is one more than the number of CNC machining units 5. The clamping mechanisms 4 can clamp the workpiece and drive the workpiece to rotate around a vertical axis, so that the side of the workpiece to be machined faces the corresponding CNC machining unit 5. A fixing frame 13 is provided on the base 1, and several tool magazines 14 for tool changing are provided on the fixing frame 13. Each tool magazine 14 corresponds to one CNC machining unit 5.

[0036] Thus, the multi-station flexible machining center of the present invention, by setting up a clamping mechanism 4, can drive the workpiece to rotate around a vertical axis, so that the orientation of the workpiece can be changed during the switching of machining stations and within the same machining station, so that each side of the workpiece can face the CNC machining unit 5 as needed. Furthermore, by setting up a tool magazine 14, the CNC machining unit 5 can change the required tools in the tool magazine 14, thus expanding the types of workpieces that can be processed by the present invention.

[0037] Preferably, the central turntable 2 is fixedly mounted on the intermittent divider 21, and the intermittent divider 21 is fixedly mounted on the base 1. The intermittent divider 21 converts the continuous rotational motion of the motor into periodic intermittent motion, thereby driving the central turntable 2 to rotate intermittently. Preferably, the intermittent divider 21 is a cam divider.

[0038] Preferably, such as Figure 8 and Figure 9 As shown, the tool magazine 14 includes an outer cover 141 and a tool turntable 142 located inside the outer cover 141. Tool holders 143 are evenly spaced on the tool turntable 142, and tools are mounted on the tool holders 143. When changing tools, the CNC machining unit 5 first moves the tool into the tool holder 143, and then disengages the tool. The tool turntable 142 rotates to rotate the required tool to the tool changing position, and the CNC machining unit 5 removes the required tool from the tool holder 143.

[0039] Preferably, the CNC machining unit 5 includes a radial moving mechanism 51, a transverse moving mechanism 52, a vertical moving mechanism 53, and a spindle 54; the spindle 54 is mounted on the vertical moving mechanism 53, the radial moving mechanism 51 is mounted on the base 1, and the transverse moving mechanism 52 is disposed between the radial moving mechanism 51 and the vertical moving mechanism 53; the spindle 54 moves in three dimensions in space under the combined drive of the radial moving mechanism 51, the transverse moving mechanism 52, and the vertical moving mechanism 53. Preferably, the radial moving mechanism 51, the transverse moving mechanism 52, and the vertical moving mechanism 53 all have a lead screw and nut transmission structure.

[0040] Preferably, a central cylinder 22 is provided in the middle of the central turntable 2; the side wall of the central cylinder 22 is provided with a slide rail arranged in a vertical direction; each clamping mechanism 4 includes a lower turntable 41 and an upper turntable 43; the upper turntable 43 can move up and down along the slide rail; the upper end of the lower turntable 41 is rotatably connected to a lower turntable 42, the lower turntable 41 is fixedly connected to the central turntable 2, and a control motor 421 is connected to the side of the lower turntable 41, the lower turntable 42 is driven by the control motor 421; the lower end of the upper turntable 43 is rotatably connected to an upper turntable 44; the rotation axes of the upper turntable 44 and the lower turntable 42 are coaxially arranged, and the workpiece is clamped between the upper turntable 44 and the lower turntable 42. The orientation of the workpiece is controlled by the control motor 421 of the lower turntable 41. This allows the side of the workpiece to be processed to be oriented towards the CNC machining unit 5 as needed. Furthermore, a first cylinder 451 and a second cylinder 452 are provided on both sides of the upper turntable 43. A stop block 453 is connected to the lower end of the piston rod of each cylinder. The stop block 453 can be embedded in the annular groove 441 at the upper end of the upper turntable 44. By providing the first cylinder 451 and the second cylinder 452, when the first cylinder 451 and the second cylinder 452 are extended, the stop block 453 abuts against the annular groove 441 of the upper turntable 44, thus restricting the rotation of the upper turntable 44 and consequently restricting the rotation of the workpiece. This makes the CNC machining unit 5 more stable when machining the workpiece.

[0041] Preferably, the upper turntable 43 is fixedly mounted on the lifting seat 46, which is provided with a slider 461 for sliding connection with the slide rail. A dust cover 221 is provided on the outside of the slide rail. An annular plate 222 is provided on the side wall of the central cylinder 22, and a lifting cylinder 23 is provided on the annular plate 222. An extension rod 231 is provided at the lower end of the piston rod of the lifting cylinder 23, and the extension rod 231 is connected to the lifting seat 46. The lifting cylinder 23 drives the lifting seat 46 to move up and down along the slide rail.

[0042] Preferably, the upper surface of the base 1 is provided with a ramp 11, the lowest point of which is a debris discharge outlet. The ramp 11 on the base 1 allows debris generated during processing to more easily slide down to the debris discharge outlet. Preferably, the front part of the base 1 is provided with a recess 12, corresponding to the loading and unloading station. The recess 12 on the side of the base 1 allows workers to more easily remove processed workpieces and place workpieces to be processed at the loading and unloading station.

[0043] The above embodiments and figures are not intended to limit the product form and style of the present invention. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.

Claims

1. A multi-station flexible machining center, characterized in that, The system includes a base, a central turntable, several sets of clamping mechanisms mounted on the central turntable, and several CNC machining units located outside the central turntable. The central turntable is rotatably connected to the base. Each CNC machining unit corresponds to a machining station. The number of clamping mechanisms is one more than the number of CNC machining units. Each clamping mechanism can clamp a workpiece and drive it to rotate around a vertical axis, so that the side of the workpiece to be machined faces the corresponding CNC machining unit. A fixed frame is provided on the base, and several tool magazines for tool changing are provided on the fixed frame. Each tool magazine corresponds to one CNC machining unit.

2. The multi-station flexible machining center as described in claim 1, characterized in that, The central turntable is fixedly mounted on the intermittent divider, and the intermittent divider is fixedly mounted on the base.

3. A multi-station flexible machining center as described in claim 1, characterized in that, The tool magazine includes an outer cover and a tool turntable located inside the outer cover. Tool clips are evenly spaced on the tool turntable, and tools are mounted on the tool clips.

4. A multi-station flexible machining center as described in claim 1, characterized in that, The CNC machining unit includes a radial moving mechanism, a transverse moving mechanism, a vertical moving mechanism, and a spindle; the spindle is mounted on the vertical moving mechanism, the radial moving mechanism is mounted on the base, and the transverse moving mechanism is disposed between the radial moving mechanism and the vertical moving mechanism; the spindle moves in three dimensions in space under the combined drive of the radial moving mechanism, the transverse moving mechanism, and the vertical moving mechanism.

5. A multi-station flexible machining center as described in claim 1, characterized in that, A central cylinder is provided in the middle of the central turntable; a slide rail is provided on the side wall of the central cylinder in a vertical direction; each clamping mechanism includes a lower turntable and an upper turntable; the upper turntable can move up and down along the slide rail; a lower turntable is rotatably connected to the upper end of the lower turntable, the lower turntable is fixedly connected to the central turntable, a control motor is connected to the side of the lower turntable, and the lower turntable is driven by the control motor; an upper turntable is rotatably connected to the lower end of the upper turntable; the rotation axes of the upper turntable and the lower turntable are coaxially arranged, and the workpiece is clamped between the upper turntable and the lower turntable.

6. A multi-station flexible machining center as described in claim 5, characterized in that, The upper turntable is provided with a first cylinder and a second cylinder on both sides. The lower ends of the piston rods of the first cylinder and the second cylinder are connected to stop blocks, which can be embedded into the annular groove at the upper end of the upper turntable.

7. A multi-station flexible machining center as described in claim 5, characterized in that, The upper turntable is fixedly installed on the lifting base, and the lifting base is provided with a slider for sliding connection with the slide rail.

8. A multi-station flexible machining center as described in claim 7, characterized in that, An annular plate is provided on the side wall of the central cylinder, and a lifting cylinder is provided on the annular plate. An extension rod is provided at the lower end of the piston rod of the lifting cylinder, and the extension rod is connected to the lifting seat.

9. A multi-station flexible machining center as described in claim 1, characterized in that, The upper surface of the base is provided with a slope, and the lowest point of the slope is the debris discharge outlet.

10. A multi-station flexible machining center as described in claim 1, characterized in that, The base has a recessed portion at the front, which corresponds to the loading and unloading station.

Images