Novel vertical machining tool and linear driving structure applied to same

Abstract

The invention provides a novel vertical processing machine tool and a linear driving structure applied to the vertical processing machine tool, the linear driving structure comprises double linear motor modules, and each linear motor module is provided with a magnetic plate magnetic track and a coil sliding block capable of moving back and forth in the length direction of the magnetic plate magnetic track. The double linear motor modules are arranged in parallel at intervals, two coil sliding blocks on the double linear motor modules are oppositely arranged face to face, and an external plate is connected between the two coil sliding blocks; the X-axis drive, the Y-axis drive and the Z-axis drive of the vertical machine tool all adopt the layout design of the double-linear-motor module, compared with the design of a U-shaped linear motor, under the same installation size, the thrust can be larger than that of the U-shaped motor, stress deformation of long-time magnetic attraction force to an installation face is avoided, meanwhile, large thrust and large acceleration can be guaranteed, and the service life of the vertical machine tool is prolonged. And high-speed cutting, high-speed machining and high machining efficiency are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of vertical machining centers, and in particular relates to a novel vertical machining center and a linear drive structure applied to the vertical machining center. Background Art

[0002] A vertical machining center is a highly automated multifunctional CNC machine tool with a tool magazine and automatic tool changing device. A vertical machining center can complete milling, boring, drilling, tapping and thread cutting processes. A vertical machining center is at least three-axis two-linkage, and generally can achieve three-axis three-linkage.

[0003] A vertical machining center refers to a machining center with a vertical spindle. Its structure is mostly a fixed column, the worktable is rectangular, and it has no indexing and rotation function. It is suitable for processing discs, sleeves, and plate parts. It generally has three linear motion coordinate axes, and a turntable that rotates along a horizontal axis can be installed on the worktable to process spiral parts.

[0004] For example, the Chinese patent of the prior art CN205764927U discloses a vertical machining center, which includes a Z-axis moving part and a bed, and the Z-axis moving part includes: two columns, the two columns are respectively connected to the two ends of the top surface of the bed; two motor connecting plates, the two sides of each motor connecting plate are respectively connected to the two columns, and an inner cavity is formed between the two motor connecting plates and the two columns; a spindle box, the spindle box is passed through the inner cavity, and the left and right sides of the spindle box are respectively slidably arranged on the two columns; a spindle, the spindle is embedded in the lower end of the spindle box; a Z-axis linear motor module is arranged between the spindle box and the motor connecting plate.

[0005] The linear drive part of the above scheme adopts the more conventional screw nut motor method to achieve single-axis linear motion, but the efficiency of screw nut transmission is generally low, and the energy consumption and noise are large during the transmission process; there is also a method of using a single linear motor for transmission, but the installation method of the conventional linear motor flat mounting surface cannot offset the problem of magnetic attraction. The long-term action of magnetic attraction can easily cause stress deformation on the mounting surface, and it is difficult to ensure the accuracy of processing accuracy after long-term use. Summary of the invention

[0006] In view of this, an object of the present invention is to provide a novel vertical machining center and a linear drive structure used in the vertical machining center, which adopts a back-to-back dual linear motor module drive layout design to offset the magnetic attraction on the mounting surface.

[0007] To achieve the above object, the present invention adopts the following contents on one hand:

[0008] A linear drive structure used in a vertical machining center, characterized in that it includes a dual linear motor module, wherein the linear motor module has a magnetic plate track and a coil slider that can move back and forth along the length direction of the magnetic plate track, the dual linear motor modules are arranged in parallel and at intervals, and the two coil sliders on the dual linear motor module are arranged face to face, and an external plate is commonly connected between the two coil sliders.

[0009] Another aspect of the present invention adopts the following contents:

[0010] A new type of vertical processing machine tool includes a bed and a column, wherein the surface of the bed is provided with a movable workbench, and the column is provided with a movable spindle for installing a processing tool, wherein a linear drive structure No. 1 as described above is arranged along the length direction of the bed, and a No. 1 external plate of the No. 1 linear drive structure is connected to the workbench; a No. 2 linear drive structure No. 2 as described above is arranged along the width direction of the column, and a No. 2 external plate of the No. 2 linear drive structure is connected to the spindle; a No. 3 linear drive structure No. 3 as described above is arranged along the height direction of the movable spindle, and a No. 3 external plate of the No. 3 linear drive structure is connected to the processing tool.

[0011] Further explanation: the workbench is arranged horizontally, the middle of the bottom end of the workbench is downwardly connected to the top of the No. 1 external plate of the No. 1 linear drive structure, the No. 1 linear drive structure is arranged along the Y-axis direction of the novel vertical machining center, and the two coil sliders of the No. 1 linear drive structure are perpendicular to the surface of the bed.

[0012] Further explanation: the movable spindle is arranged vertically, the middle of the outer end of the movable spindle is connected inwardly to the side of the No. 2 external plate of the No. 2 linear drive structure, the No. 2 linear drive structure is arranged along the X-axis direction of the novel vertical machining center, and the two coil sliders of the No. 2 linear drive structure are perpendicular to the inner side of the column.

[0013] It is further explained that the No. 3 linear drive structure is arranged along the Z-axis direction of the novel vertical machining center, and the two coil sliders of the No. 3 linear drive structure are perpendicular to the outer side surface of the movable spindle.

[0014] Compared with the prior art, the present invention has the following technical effects: the present invention has a simple structure and a reasonable design. Compared with the single motor module design that flattens the mounting surface and cannot offset the magnetic attraction, the dual linear motor module layout design that is back-to-back and perpendicular to the mounting surface can offset the magnetic attraction in any case, avoid the stress deformation of the mounting surface caused by the long-term magnetic attraction, and ensure long-term precision stability; Compared with the U-shaped linear motor design, the dual linear motor module layout design that is back-to-back and perpendicular to the mounting surface can have a greater thrust than the U-shaped motor under the same mounting dimensions, avoid the stress deformation of the mounting surface caused by the long-term magnetic attraction, and ensure large thrust and large acceleration, so as to achieve high-speed chip cutting, high-speed processing and high processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The specific implementation modes of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0016] Figure 1 This is a simplified schematic diagram of a linear drive structure used in a vertical processing machine tool according to an embodiment of the present invention;

[0017] Figure 2 It is a simplified schematic diagram of a novel vertical processing machine tool according to an embodiment of the present invention;

[0018] Relevant marks in the accompanying drawings: a-installation surface, 1-linear motor module, 11-magnetic plate track, 12-coil slider, 13-external plate, 2-bed, 3-column, 4-workbench, 5-movable spindle, 6-machining tool. DETAILED DESCRIPTION

[0019] In order to explain the present invention more clearly, the present invention is further described below in conjunction with preferred embodiments. It should be understood by those skilled in the art that the following specific description is illustrative rather than restrictive, and should not be used to limit the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] See also Figure 1 As shown, it is a relevant schematic diagram of the bed surface.

[0022] Embodiment 1:

[0023] An embodiment of the present invention provides a linear drive structure for use in a vertical machining center, using two groups of linear motor modules 1 with the same structure. Each linear motor module 1 has a magnetic plate track 11 and a coil slider 12 that can move forward and backward along the length direction of the magnetic plate track 11. The two groups of linear motor modules 11 are arranged in parallel and at intervals, and the two coil sliders 12 on the two groups of linear motor modules 1 are arranged face to face, and an external plate 13 is commonly connected between the two coil sliders 12.

[0024] Compared with the single motor module design that cannot offset the magnetic attraction force due to the flat mounting surface, the dual linear motor module layout design that is back-to-back and perpendicular to the mounting surface a can offset the magnetic attraction force under any circumstances, avoid the stress deformation of the mounting surface a due to the long-term magnetic attraction force, and ensure long-term accuracy stability.

[0025] See also Figure 2 shown.

[0026] Example 2: Based on the linear drive structure proposed in Example 1, the embodiment of the present invention proposes a new type of vertical processing machine tool, which includes a bed 2 and a column 3. The surface of the bed 2 has a movable worktable 4, and the column 3 has a movable spindle 5 for installing a processing tool 6.

[0027] Among them, the linear drive structure No. 1 as described above is arranged along the length direction of the bed, and the external plate No. 1 of the linear drive structure No. 1 is connected to the workbench; the workbench is arranged horizontally, and the middle of the bottom end of the workbench is downwardly connected to the top of the external plate No. 1 of the linear drive structure No. 1, and the two linear motor modules of the linear drive structure No. 1 are arranged along the Y-axis direction of the new vertical machining center, and the two coil sliders of the linear drive structure No. 1 are perpendicular to the surface of the bed.

[0028] Among them, the No. 2 linear drive structure as described above is arranged along the width direction of the column, and the No. 2 external plate of the No. 2 linear drive structure is connected to the main shaft; the movable main shaft is arranged vertically, and the middle of the outer end of the movable main shaft is connected inwardly to the side of the No. 2 external plate of the No. 2 linear drive structure, and the dual linear motor module of the No. 2 linear drive structure is arranged along the X-axis direction of the new vertical machining center, and the two coil sliders of the No. 2 linear drive structure are perpendicular to the inner side of the column.

[0029] Among them, the No. 3 linear drive structure as described above is arranged along the height direction of the movable spindle, and the No. 3 external plate of the No. 3 linear drive structure is connected to the processing tool; the dual linear motor module of the No. 3 linear drive structure is arranged along the Z-axis direction of the new vertical processing machine tool, and the two coil sliders of the No. 3 linear drive structure are perpendicular to the outer side of the movable spindle.

[0030] Most machine tools use a parallel structure for their drives. The biggest disadvantage of a parallel structure linear motor is the magnetic influence of the linear motor, which results in less than ideal flatness of the worktable and shortens the life of the linear motor.

[0031] The X-axis, Y-axis, and Z-axis drives of the vertical machining center of this embodiment all adopt a dual linear motor module layout design, that is, a dual linear motor module layout design that is back-to-back and perpendicular to the mounting surface. Compared with the U-shaped linear motor design, under the same mounting dimensions, the thrust can be greater than that of the U-shaped motor, avoiding long-term magnetic attraction. The stress deformation of the mounting surface can also ensure large thrust and large acceleration, achieving high-speed chip cutting, high-speed processing, and high processing efficiency.

[0032] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A linear drive structure used in a vertical machining center, characterized in that: It includes a dual linear motor module, which has a magnetic plate track and a coil slider that can move back and forth along the length direction of the magnetic plate track. The dual linear motor modules are arranged in parallel and at intervals, and the two coil sliders on the dual linear motor module are arranged face to face, and an external plate is commonly connected between the two coil sliders.

2. A new type of vertical processing machine tool, comprising a bed and a column, wherein the surface of the bed has a movable workbench, and the column has a movable spindle for mounting a processing tool, characterized in that: A linear drive structure No. 1 as described in claim 1 is arranged along the length direction of the bed, and an external plate No. 1 of the linear drive structure No. 1 is connected to the workbench; a linear drive structure No. 2 as described in claim 1 is arranged along the width direction of the column, and an external plate No. 2 of the linear drive structure No. 2 is connected to the spindle; a linear drive structure No. 3 as described in claim 1 is arranged along the height direction of the movable spindle, and an external plate No. 3 of the linear drive structure No. 3 is connected to the machining tool.

3. A novel vertical processing machine tool according to claim 2, characterized in that: The workbench is arranged horizontally, and the middle of the bottom end of the workbench is downwardly connected to the top of the No. 1 external plate of the No. 1 linear drive structure. The No. 1 linear drive structure is arranged along the Y-axis direction of the novel vertical processing machine tool, and the two coil sliders of the No. 1 linear drive structure are perpendicular to the surface of the bed.

4. A novel vertical processing machine tool according to claim 2, characterized in that: The movable spindle is arranged vertically, and the middle of the outer end of the movable spindle is connected inwardly to the side of the No. 2 external plate of the No. 2 linear drive structure. The No. 2 linear drive structure is arranged along the X-axis direction of the novel vertical machining center, and the two coil sliders of the No. 2 linear drive structure are perpendicular to the inner side of the column.

5. A novel vertical processing machine tool according to claim 2, characterized in that: The No. 3 linear drive structure is arranged along the Z-axis direction of the novel vertical processing machine, and the two coil sliders of the No. 3 linear drive structure are perpendicular to the outer side surface of the movable spindle.

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