Horizontal machine tool base structure

Abstract

The utility model discloses a horizontal machine tool base structure relates to the related field of processing machine tool, including first base body and second base body, first base body top surface middle part is equipped with the chip removal groove, both sides symmetry are equipped with 30~60 inclination Z axis inclined plane, install parallel Z axis inclined plane Z axis linear motor and the Z axis guide rail of ladder shape on it, the chip removal mechanism is installed in the chip removal groove, and second base body is equipped with X axis inclined plane and ladder guide rail, and double Z axis linear motor symmetrical inclination layout reduces magnetic attraction horizontal component, restrains guide rail deformation, and the middle part chip removal groove promotes the chip removal efficiency, reduces the chip accumulation, and the ladder guide rail optimizes space utilization, and double -drive structure improves Z axis acceleration, and grating ruler guarantees processing accuracy, is applicable to high dynamic precision machining.

Description

Technical Field

[0001] This utility model relates to the technical field of machine tools, specifically a horizontal machine tool base structure. Background Technology

[0002] The existing Z-axis drive of horizontal machining centers faces a dilemma. In a horizontal layout, the linear motor is placed horizontally between two guide rails. Although dual drive is possible, it occupies chip removal space, preventing chips from falling directly and causing them to accumulate. A side chip removal system must be relied upon, but the side chip removal efficiency is low and chip jamming can easily cause downtime. In a vertical layout, the motor is placed vertically. Although a central chip removal channel is reserved, enabling central chip removal, the magnetic attraction of the linear motor acts vertically on the guide rails. After long-term operation, local deformation of the guide rail surface will occur, affecting machining accuracy. Utility Model Content

[0003] The purpose of this invention is to provide a horizontal machine tool base structure that ensures chip removal in the middle and a dual-drive layout while utilizing the tilt angle to decompose magnetic attraction and reduce the problem of local deformation of the Z-axis guide rail after long-term operation.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a horizontal machine tool base structure, comprising:

[0005] a first base body and a second base body;

[0006] The top surface of the first base is provided with a chip removal groove, and two Z-axis inclined surfaces are provided on the top surface of the first base symmetrically arranged with respect to the chip removal groove for mounting the Z-axis drive unit.

[0007] The second base is connected to one side of the first base and is used to mount the X-axis drive unit.

[0008] In a further technical solution, the angle between the Z-axis inclined plane and the horizontal plane is α, and 30°≤α≤60°.

[0009] The tilted symmetrical layout reduces the horizontal component of the magnetic attraction force of the linear motor on the guide rail, the dual-motor drive increases the Z-axis acceleration, and the central chip removal groove directly collects chips, improving chip removal efficiency.

[0010] A further technical solution is to provide Z-axis guide rails arranged in a stepped manner on both Z-axis inclined surfaces.

[0011] In a further technical solution, the Z-axis drive unit includes a Z-axis linear motor mounted on the inclined surface, and the mounting surface of the Z-axis linear motor is parallel to the Z-axis inclined surface.

[0012] The stepped design optimizes the spatial layout, integrating guide rails and chip removal channels within a limited height, balancing structural rigidity and smooth chip removal.

[0013] In a further technical solution, a chip removal mechanism is installed inside the chip removal groove.

[0014] In a further technical solution, an X-axis inclined surface is provided on the second substrate, and X-axis guide rails arranged in a stepped manner are provided on the X-axis inclined surface.

[0015] In a further technical solution, both the bottom of the first substrate and the second substrate are provided with mounting holes.

[0016] A further technical solution involves mounting a Z-axis grating ruler on the first substrate.

[0017] In a further technical solution, an X-axis grating ruler is mounted on the second substrate.

[0018] The Z-axis and X-axis optical grating rulers provide real-time position feedback signals, improving machining accuracy.

[0019] In summary, this utility model has the following beneficial effects: by setting the linear motor in a symmetrically inclined machine tool base, the influence of the horizontal component of the magnetic attraction force on the guide rail is suppressed; the Z-axis linear motor is installed at an inclination angle of 30° to 60°, decomposing the magnetic attraction force into a vertical component F2 and a horizontal component F1, thereby reducing the risk of guide rail deformation.

[0020] The dual Z-axis linear motors provide symmetrical drive, offering twice the power and increasing processing speed. Combined with closed-loop control using a linear encoder, this improves processing accuracy.

[0021] The central chip chute collects chips directly, improving chip removal efficiency and avoiding the accumulation problem of traditional side-discharge chips; and the inclined stepped guide rails save space compared to the horizontal layout. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0023] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the installation of the Z-axis linear motor and Z-axis guide rail according to this utility model;

[0025] Figure 3 This is a schematic diagram of the magnetic attraction force decomposition of this utility model;

[0026] In the figure: 10, First base; 11, Z-axis inclined surface; 12, chip removal groove; 13, Z-axis guide rail mounting surface; 14, foot mounting hole; 20, Second base; 21, X-axis inclined surface; 22, X-axis guide rail mounting surface; 30, Z-axis linear motor; 40, Z-axis guide rail; 50, chip removal mechanism; 60, X-axis grating ruler; 70, Z-axis grating ruler. Detailed Implementation

[0027] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0029] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] like Figures 1-2 As shown, a horizontal machine tool base structure, the core innovation of which is to solve the requirements of high-efficiency chip removal in the middle, dual linear motor drive of the Z-axis, and suppress the influence of the magnetic attraction of the Z-axis linear motor on the deformation of the Z-axis guide rail through a unique inclined Z-axis drive layout. The inclined horizontal machining center base includes two parts: a first base 10 and a second base 20.

[0033] Specifically, the length direction of the first base 10 is perpendicular to the length direction of the second base 20. At the middle position of the first base 10, a chip removal groove 12 is provided extending along the length direction of the first base 10, that is, the Z-axis direction. The chip removal groove 12 is located directly below the worktable and is used to directly receive the chips generated during the processing, realize the intermediate chip removal function, and improve chip removal efficiency.

[0034] On the left and right sides of the chip removal groove 12, the top surface of the first base 10 extends upward to form two Z-axis inclined surfaces 11 symmetrically arranged relative to the chip removal groove 12. These two Z-axis inclined surfaces 11 are used to install the Z-axis drive unit. The inclined angle between the Z-axis inclined surface 11 and the horizontal plane is defined as α. Considering the optimization of the spatial layout, taking into account the chip removal effect, the driving force transmission efficiency, and the suppression of the influence of magnetic attraction on the Z-axis guide rail, the preferred range of the inclined angle is 30°≤α≤60°. In this embodiment, the inclined angle α between the Z-axis inclined surface 11 and the horizontal plane is specifically 60°.

[0035] Two Z-axis drive units are provided, each mounted on a Z-axis inclined surface 11, symmetrically arranged relative to the chip removal groove 12. Each Z-axis drive unit includes a Z-axis linear motor 30 and a Z-axis guide rail 40. The Z-axis linear motor 30 is mounted on the Z-axis inclined surface 11, and the mounting surface of the Z-axis linear motor 30 is parallel to the Z-axis inclined surface 11. The two Z-axis linear motors 30 are respectively mounted on two symmetrical Z-axis inclined surfaces 11, forming a dual linear motor drive layout for the Z-axis. This symmetrical dual drive layout can provide greater thrust than a single drive layout, enabling the worktable to move at high speed, achieve faster acceleration and deceleration, and improve machining efficiency.

[0036] On the two Z-axis inclined surfaces 11, there are Z-axis guide rail mounting surfaces 13 arranged in a stepped manner. The Z-axis guide rail 40 is precisely installed on the Z-axis guide rail mounting surface 13 by fasteners such as bolts. The slide or saddle of the worktable is assembled on the Z-axis guide rail 40. The stepped design optimizes the space utilization of the first base 10 and takes into account the need for intermediate chip removal.

[0037] The Z-axis linear motor is tilted, with the magnetic force F making an angle θ with the horizontal plane. θ and α are complementary, meaning θ + α = 90°. The magnetic force F is decomposed into a horizontal component F1 and a vertical component F2, which significantly reduces the impact on horizontal deformation of the guide rail. (See attached diagram.) Figure 3 .

[0038] Analysis of the magnetic attraction force: Since the Z-axis linear motor is installed at an angle of 30°, the direction of the magnetic attraction force F it generates is also inclined relative to the horizontal plane, and perpendicular to the motor mounting surface. Let the angle between the magnetic attraction force F and the horizontal plane be θ. According to geometric relationships, θ + α = 90°, that is, θ and α are complementary. The magnetic attraction force F can be decomposed into:

[0039] Orthogonally decompose the magnetic attraction force F:

[0040] Horizontal component force F1: F1=F*cosθ=F*sinα, this force is the main factor causing harmful deformation of Z-axis guide rail 40 in the horizontal direction.

[0041] Vertical component of force F2: F2=F*sinθ=F*cosα;

[0042] The tilted design of this utility model, with 30°≤α≤60°, significantly reduces the harmful horizontal component force F1 acting on the Z-axis guide rail 40 compared to the vertical arrangement where α=90°, θ=0°, F1=F*cos0°=F*1=F.

[0043] Taking α = 60° in this embodiment as an example: the angle α between the inclined plane of the Z-axis and the horizontal plane is 60°, F1 = F*sin60°≈F*0.866, which means that the horizontal component force is only about 86.6% of that when arranged vertically, that is, it is reduced by about 13.4%. The 60° inclination angle reduces the horizontal component force F1 of the magnetic attraction force, taking into account both spatial layout and chip removal.

[0044] Examples of other implementation methods:

[0045] If α = 45°, F1 = F*sin45° ≈ F*0.707, a decrease of approximately 29.3%;

[0046] If α = 30°, F1 = F*sin30° = F*0.5, which decreases by 50%.

[0047] The effective reduction of this horizontal component force F1 directly reduces the risk of horizontal deformation of the left and right Z-axis guide rails 40 caused by the magnetic attraction force generated by the linear motor during long-term operation, thereby ensuring the high rigidity and long-term motion accuracy of the entire Z-axis drive part.

[0048] In one embodiment, a chip removal mechanism 50 is installed in the chip removal groove 12. In this embodiment, the chip removal mechanism 50 can be a chain plate type chip conveyor. To ensure that the chip removal mechanism 50 operates smoothly and effectively collects chips, an appropriate installation and operation gap needs to be maintained between the inner wall width W of the chip removal groove 12 and the width P of the chip removal mechanism 50. The gap between the inner wall of the chip removal groove 12 and the chip removal mechanism 50 satisfies 0 < W P ≤ 10 mm, and preferably 5 mm in this embodiment.

[0049] In one embodiment, a Z-axis grating ruler 70 is mounted on the first base 10. In this embodiment, the Z-axis grating ruler 70 is mounted on the side of the first base 10. This design does not affect the installation of the guide rail, facilitates maintenance and reading, and is used for real-time high-precision detection of the position of the worktable in the Z-axis direction.

[0050] In one embodiment, a second base 20 is connected to one side of a first base 10. The length direction (i.e., the X-axis direction) of the second base 20 is perpendicular to the length direction (i.e., the Z-axis direction) of the first base 10. It is used to support and install the X-axis drive unit. An X-axis inclined surface 21 is provided on the second base 20. An X-axis guide rail mounting surface 22 arranged in a stepped manner is machined on the X-axis inclined surface 21 for mounting the X-axis guide rail (not shown). The X-axis drive unit includes an X-axis linear motor (not shown) and an X-axis guide rail. The X-axis motor is mounted on the X-axis inclined surface 21 and is used to drive the spindle box (not shown) to move along the X-axis direction. The slider of the spindle box is slidably mounted on the X-axis guide rail.

[0051] The second substrate 20 is provided with an X-axis grating ruler mounting plate 60, which is used to mount an X-axis grating ruler (not shown) to achieve high-precision position feedback of the X-axis.

[0052] In one embodiment, the bottom of both the first base 10 and the second base 20 is provided with a plurality of foot mounting holes 14. The foot mounting holes 14 are machined with internal threads for tightening with the external threads of the anchor bolts or pads, thereby achieving stable and horizontal installation of the entire bed structure on the foundation.

[0053] Working principle:

[0054] During machining, the workpiece is fixed on the worktable. Two Z-axis linear motors 30 work together to drive the worktable and its sliding saddle to move at high speed and high precision along the Z-axis. The chips generated during machining fall directly into the chip removal groove 12 below and are promptly and efficiently discharged from the machine tool by the chip removal mechanism 50. The X-axis drive section drives the spindle box and other components to move along the X-axis. The inclined and symmetrical arrangement of the Z-axis linear motors 30 is the core of this design. It achieves intermediate chip removal through the intermediate chip removal groove 12 and achieves high-speed and precise drive through the symmetrical dual Z-axis linear motors 30. The inclined surface allows the Z-axis linear motors to be installed at an angle, reducing the influence of the horizontal component of the magnetic attraction force F1 on the guide rail.

[0055] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0056] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0057] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A horizontal machine tool base structure, characterized in that, include: The first base body (10) and the second base body (20); The top surface of the first base (10) is provided with a chip removal groove (12), and the top surface of the first base (10) is provided with two Z-axis inclined surfaces (11) symmetrically arranged with respect to the chip removal groove (12) for mounting the Z-axis drive unit. The second base (20) is connected to one side of the first base (10) and is used to mount the X-axis drive unit.

2. The horizontal machine tool base structure according to claim 1, characterized in that, The angle between the inclined plane (11) of the Z-axis and the horizontal plane is α, and 30°≤α≤60°.

3. The horizontal machine tool base structure according to claim 1, characterized in that, Both Z-axis inclined surfaces (11) are provided with Z-axis guide rails (40) arranged in a stepped manner.

4. The horizontal machine tool base structure according to claim 1, characterized in that, The Z-axis drive unit includes a Z-axis linear motor (30) mounted on the Z-axis inclined surface (11), and the mounting surface of the Z-axis linear motor (30) is parallel to the Z-axis inclined surface (11).

5. The horizontal machine tool base structure according to claim 1, characterized in that, A chip removal mechanism (50) is installed inside the chip removal groove (12).

6. The horizontal machine tool base structure according to claim 1, characterized in that, The second substrate (20) is provided with an X-axis inclined surface (21), and the X-axis inclined surface (21) is provided with X-axis guide rails arranged in a stepped manner.

7. The horizontal machine tool base structure according to claim 1, characterized in that, Both the first base (10) and the second base (20) have mounting holes (14) at their bottoms.

8. The horizontal machine tool base structure according to claim 1, characterized in that, A Z-axis grating ruler (70) is mounted on the first substrate (10).

9. A horizontal machine tool base structure according to claim 1, characterized in that, An X-axis grating ruler is mounted on the second substrate (20).

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