Four-axis numerical control machine tool suitable for machining weakly-rigid parts

Abstract

The four-axis numerical control machine tool comprises a machine tool body, a rotary table seat body, a first rotary working table and a second rotary working table, the rotary table seat body is installed on the front portion of the machine tool body, and the first rotary working table and the second rotary working table are both installed on the rotary table seat body and are oppositely arranged left and right. And the rotating shafts can synchronously or independently rotate around the A axis. The device is high in installation rigidity, high in operability, wide in application range and capable of greatly reducing deformation of weak-rigidity parts in the machining process and achieving efficient and high-precision machining of complex curved surfaces.

Description

Technical Field

[0001] The utility model belongs to the technical field of machine tools, and particularly relates to a four-axis numerical control machine tool suitable for machining weak rigidity parts. Background Art

[0002] Weak rigid parts are generally larger in length and width, and their profiles are mostly complex spatial curved surfaces, and their surfaces are mostly free-form surfaces. The difficulty in processing lies in the low strength of the parts themselves, the complex processing surfaces, and the high processing accuracy and surface quality requirements. It is difficult for general three-axis machine tools to achieve the processing requirements of complex curved surfaces, and five-axis machine tools are also difficult to meet their processing requirements due to the strength limitations of the parts themselves. In order to reduce the deformation of the workpiece during processing, the existing technology also uses the method of adding a rotating axis and a thimble (or tailstock) to the three-axis machine tool for processing, but because the parts themselves will transmit the torque of the four-axis rotation, it is easy to cause deformation at the end of the thin-walled parts, which cannot meet the processing requirements. Summary of the invention

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a four-axis linkage CNC machine tool with high installation rigidity, strong operability and wide application range, which can greatly reduce the deformation of weak rigid parts during processing and realize efficient and high-precision processing of complex curved surfaces.

[0004] In order to solve the above technical problems, the utility model is implemented through the following technical solutions: a four-axis CNC machine tool suitable for processing weak rigid parts, including a bed, a turntable base body, a first rotary worktable and a second rotary worktable, the turntable base body is installed on the front part of the bed, the first rotary worktable and the second rotary worktable are both installed on the turntable base body, and are arranged opposite to each other on the left and right, and can rotate synchronously or individually around the A-axis respectively.

[0005] The above-mentioned four-axis CNC machine tool is suitable for processing weak rigid parts. The turntable base body includes a mounting base, a fixed base, a movable base and a turntable guide rail. The mounting base is fixed on the bed, the fixed base is fixed to the left side of the mounting base, and the turntable guide rail is arranged along the X-axis direction and fixed to the right side of the mounting base; the movable base is slidably mounted on the turntable guide rail and can move left and right along the turntable guide rail; the first rotary worktable is mounted on the fixed base, and the second rotary worktable is mounted on the movable base.

[0006] The above-mentioned four-axis CNC machine tool is suitable for processing weak rigid parts. A first rotation drive device is installed on the fixed seat, and a second rotation drive device is installed on the movable seat. The first rotation drive device and the second rotation drive device can respectively drive the first rotary table and the second rotary table to rotate synchronously or separately.

[0007] In the above-mentioned turntable structure of a CNC machine tool, the first rotation drive device and the second rotation drive device adopt a dual-torque motor distributed parallel drive structure, which are controlled by two drivers respectively. The two drivers communicate with each other and can perform independent drive or master-slave coordinated synchronous drive.

[0008] In the above-mentioned turntable structure of a CNC machine tool, a moving control driving device is arranged on the moving seat, which can control the moving seat to move along the turntable guide rail or lock the moving seat on the turntable guide rail.

[0009] The above-mentioned four-axis CNC machine tool suitable for processing weak rigid parts also includes a left support, a right support, a crossbeam and a machine head, the left support and the right support are respectively fixed on the bed, the crossbeam is installed on the left support and the right support, and the machine head is installed on the crossbeam; an electric spindle is arranged on the machine head, and the electric spindle can perform relative reciprocating linear motion with the first rotary worktable and the second rotary worktable in three directions of X-axis, Y-axis and Z-axis.

[0010] The above-mentioned four-axis CNC machine tool suitable for processing weak rigidity parts, the left support and the right support are respectively provided with Y guide rails, the crossbeam is slidably installed on the Y guide rails, and can reciprocate along the Y guide rails in the Y-axis direction; the crossbeam is provided with X guide rails, the machine head is slidably installed on the X guide rails, and can reciprocate along the X-axis direction.

[0011] The above-mentioned four-axis CNC machine tool is suitable for processing weak rigid parts. The head includes a Z-axis connecting plate, a Z-guide rail, a Z-axis driving device and a sliding base plate. The Z-axis connecting plate acts on the X-guide rail, and the Z-guide rail is installed on the Z-axis connecting plate. The sliding base plate acts on the Z-guide rail and can move along the Z-guide rail under the action of the Z-axis driving device; the electric spindle is fixedly installed on the sliding base plate and can reciprocate along the Z-axis direction with the sliding base plate.

[0012] The above-mentioned four-axis CNC machine tool suitable for processing weak rigidity parts has a V-shaped chip removal groove arranged on the bed, and the V-shaped chip removal groove is located below the turntable seat body.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the utility model adopts a dual rotary table structure arranged relatively to each other, and can realize dual-drive positioning through independently controlled synchronous rotary motion, effectively avoiding the problem of deformation of the workpiece end caused by torque transmission, and greatly improving the processing quality of weak rigid parts. At the same time, the second rotary table moves along the axial direction, and the table spacing is adjustable, which can adapt to the processing of parts of different sizes and has a wide range of uses. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the utility model.

[0015] Figure 2 It is a schematic diagram of the turntable structure provided by an embodiment of the utility model. Implementation

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0017] In the description of the embodiments of the present utility model, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0018] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0019] like Figure 1 As shown, a four-axis CNC machine tool suitable for processing weak rigid parts provided by an embodiment of the utility model comprises a bed 1, a crossbeam 2, a Z-axis connecting plate 3, a sliding base plate 4, an electric spindle 5, an A-axis turntable 6, a left support 7 and a right support 8. The A-axis turntable 6 is fixed to the front of the bed 1. The bed 1 is also respectively fixed with a left support 7 and a right support 8, and the left support 7 and the right support 8 can be a split structure or an integrated structure. The embodiment of the utility model adopts a U-shaped integrated structure, and a closed support seat is formed at the rear end of the bed 1, which can be used to install a Y-axis drive device 12. Y-guide rails 11 are respectively provided on the left support 7 and the right support 8, and the crossbeam 2 is slidably installed on the Y-guide rails 11, and can reciprocate along the Y-guide rails 11 in the Y-axis direction under the action of the Y-axis drive device 12. The top and front side of the crossbeam 2 are respectively provided with X-guide rails 21, and the Z-axis connecting plate 3 is slidably mounted on the X-guide rails 21, and can reciprocate along the X-guide rails 21 under the action of the X-axis driving device 22. The Z-guide rails 31 are mounted on the Z-axis connecting plate 3, and the sliding base plate 4 is slidably mounted on the Z-guide rails 31, and can reciprocate along the Z-guide rails 31 under the action of the Z-axis driving device 32. The electric spindle 5 is fixedly mounted on the sliding base plate 4, and can reciprocate along the Z-axis direction with the sliding base plate 4.

[0020] like Figure 2 As shown, the A-axis turntable 6 includes a mounting base 61, a fixed base 62, a turntable guide rail 63, a movable base 64, a first rotating worktable 65, and a second rotating worktable 66. The mounting base 61 is fixed on the bed 1, the fixed base 62 is fixed to the left side of the mounting base 61, and the turntable guide rail 63 is arranged along the X-axis direction and fixed to the right side of the mounting base 61. The movable base 64 is slidably mounted on the turntable guide rail 63 and can move left and right along the turntable guide rail 63. The first rotating worktable 65 is mounted on the fixed base 62, and the second rotating worktable 66 is mounted on the movable base 64, and can move left and right with the movable base 64; the table surfaces of the first rotating worktable 65 and the second rotating worktable 66 are arranged opposite to each other, and as the second rotating worktable 66 moves left and right, the distance between the first rotating worktable 65 and the second rotating worktable 66 can be expanded or reduced, so as to clamp the workpiece according to the length of the workpiece, thereby reducing the difficulty of clamping. The movable seat 64 is also provided with a moving control driving device 69 , which can control the movable seat 64 to move along the turntable guide rail 63 or lock the movable seat 64 on the turntable guide rail 63 .

[0021] A first rotary drive device 67 is provided in the fixed seat 62, and the first rotary table 65 is connected to the first rotary drive device 67; a second rotary drive device 68 is provided in the movable seat 64, and the second rotary table 66 is connected to the second rotary drive device 68. The first rotary drive device 67 and the second rotary drive device 68 adopt a dual-torque motor distributed parallel drive structure, which is controlled by two drivers respectively. The two drivers communicate with each other and can be driven independently or synchronously by master-slave cooperation, so that the first rotary drive device 67 and the second rotary drive device 68 respectively drive the first rotary table 65 and the second rotary table 66 to rotate synchronously or independently.

[0022] When the utility model is working, the electric spindle 5 can realize three-axis linear motion, and cooperate with the high-speed rotation of the first rotary table 65 and the second rotary table 66 to realize four-axis linkage processing, effectively improving the processing accuracy and processing quality. In order to facilitate chip removal, a V-shaped chip removal groove 9 is also provided on the bed 1. The V-shaped chip removal groove 9 is located below the A-axis rotary table 6. The chips in the processing process can directly fall into the V-shaped chip removal groove 9, which has high chip removal efficiency, is easy to clean, and is not easy to accumulate chips.

[0023] Although the utility model is described in detail above, the utility model is not limited thereto, and those skilled in the art can make various modifications according to the principle of the utility model. Therefore, all modifications made according to the principle of the utility model should be understood to fall within the protection scope of the utility model.

Claims

1. A four-axis CNC machine tool suitable for machining weak rigid parts, characterized in that: It includes a bed, a turntable base, a first rotating worktable and a second rotating worktable. The turntable base is installed at the front of the bed. The first rotating worktable and the second rotating worktable are both installed on the turntable base and are arranged opposite to each other on the left and right, and can rotate synchronously or independently around the A axis respectively.

2. A four-axis CNC machine tool suitable for machining weak rigid parts according to claim 1, characterized in that: The turntable seat body includes a mounting base, a fixed seat, a movable seat and a turntable guide rail. The mounting base is fixed on the bed, the fixed seat is fixed on the left side of the mounting base, and the turntable guide rail is arranged along the X-axis direction and fixed on the right side of the mounting base; the movable seat is slidably mounted on the turntable guide rail and can move left and right along the turntable guide rail; the first rotating worktable is mounted on the fixed seat, and the second rotating worktable is mounted on the movable seat.

3. A four-axis CNC machine tool suitable for machining weak rigid parts according to claim 2, characterized in that: The fixed seat is provided with a first rotation driving device, and the movable seat is provided with a second rotation driving device. The first rotation driving device and the second rotation driving device can respectively drive the first rotating worktable and the second rotating worktable to rotate synchronously or independently.

4. A four-axis CNC machine tool suitable for machining weak rigid parts according to claim 3, characterized in that: The first rotation drive device and the second rotation drive device adopt a dual-torque motor distributed parallel drive structure, which is controlled by two drivers respectively. The two drivers communicate with each other and can perform independent driving or master-slave coordinated synchronous driving.

5. A four-axis CNC machine tool suitable for machining weak rigid parts according to claim 4, characterized in that: The movable seat is provided with a moving control driving device, which can control the movable seat to move along the turntable guide rail or lock the movable seat on the turntable guide rail.

6. A four-axis CNC machine tool suitable for machining weak rigid parts according to any one of claims 1 to 5, characterized in that: It also includes a left support, a right support, a crossbeam and a machine head. The left support and the right support are respectively fixed on the bed, the crossbeam is installed on the left support and the right support, and the machine head is installed on the crossbeam. An electric spindle is arranged on the machine head, and the electric spindle can perform relative reciprocating linear motion with the first rotary worktable and the second rotary worktable in three directions of X-axis, Y-axis and Z-axis.

7. A four-axis CNC machine tool suitable for machining weak rigid parts according to claim 6, characterized in that: The left support and the right support are respectively provided with Y guide rails, and the crossbeam is slidably installed on the Y guide rails, and can reciprocate along the Y guide rails in the Y-axis direction; the crossbeam is provided with X guide rails, and the head is slidably installed on the X guide rails, and can reciprocate along the X-axis direction.

8. A four-axis CNC machine tool suitable for machining weak rigid parts according to claim 7, characterized in that: The machine head includes a Z-axis connecting plate, a Z-guide rail, a Z-axis driving device and a sliding base plate. The Z-axis connecting plate acts on the X-guide rail, the Z-guide rail is installed on the Z-axis connecting plate, the sliding base plate acts on the Z-guide rail and can move along the Z-guide rail under the action of the Z-axis driving device; the electric spindle is fixedly installed on the sliding base plate and can reciprocate along the Z-axis direction with the sliding base plate.

9. A four-axis CNC machine tool suitable for machining weak rigid parts according to claim 8, characterized in that: The bed is provided with a V-shaped chip removal groove, which is located below the turntable seat.

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