Machine tool body with combined guide rail structure

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By adopting a guide rail structure design combining line rails and hard rails in CNC machine tools, the problem of inconsistent movement and fixing methods of tail seat rails and center frames during automation cooperation is solved, and the demand for automated control and high rigidity is achieved, reducing equipment costs.

CN222806515UActive Publication Date: 2025-04-29FOSHAN RUISHI PRECISION MACHINERY CO LTD

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Patent Information

Application Number: CN202421666861.9
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-07-12
Publication Date: 2025-04-29
Estimated Expiration: 2034-07-12

AI Technical Summary

Technical Problem

When the existing CNC machine tools are automated, the tailstock guide rails need to adopt a linear rail structure, but the center frame is difficult to use the same moving and fixing methods, resulting in an increase in equipment costs and cannot meet the requirements of automatic control of tailstock components.

Method used

The structural design is adopted for combining wire rails and hard rails. The tailstock parts use wire rail structures, and the center frame uses hard rail structures. The two guide rail structures can be used at the same time and do not interfere with each other.

Benefits of technology

It realizes the automatic control and operation characteristics of tailstock components, and at the same time meets the center frame's demand for manual or semi-automatic control methods and high rigidity, reducing equipment costs.

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Abstract

The utility model discloses a machine tool body with a combined guide rail structure, which comprises a machine tool body, two guide rail mounting seats are arranged on the machine tool body at intervals, linear rails are mounted on the upper surfaces of the two guide rail mounting seats, a plurality of linear rail sliders are slidably connected onto the linear rails, and tailstock components are mounted on the linear rail sliders. Hard rails are arranged on the back-to-back sides of the two guide rail installation seats and are parallel to the upper surfaces of the guide rail installation seats, a hard rail sliding block is connected to the two hard rails in a sliding mode, a center frame is installed on the hard rail sliding block, and the hard rails and the linear rails are mutually independent and do not make contact with each other. The machine tool body adopts the structural design of combining the linear rails and the hard rails, the tailstock component adopts a linear rail structure mode, the center frame adopts a hard rail structure mode, and the two guide rail structure modes can be used simultaneously and do not interfere with each other, so that the requirements of the tailstock component on automatic control and good operation characteristics are met, and the production efficiency is improved. And the requirements of the center frame on high rigidity in a manual or semi-automatic control mode are met.

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Description

Technical Field

[0001] The utility model relates to the technical field of numerically controlled machine tools, in particular to a machine tool bed with a combined guide rail structure. Background Art

[0002] There are two main structural types of guide rails for CNC machine tools. One is the hard rail type structure, which uses materials such as cast iron or steel, and achieves the required functions and performance through machining and heat treatment. The main feature of the hard rail is the surface contact method, which has relatively high rigidity, low cost, and complex processing and maintenance. The other is the linear rail type structure. The main feature of the linear rail is the point or line contact method, which has high relative motion accuracy, high cost, and simple assembly and maintenance.

[0003] CNC lathes are usually equipped with a tailstock assembly. When processing long workpieces, the spindle assembly clamps the workpiece, and the tailstock assembly assists in tightening the workpiece at the other end. Therefore, the tailstock assembly has high rigidity requirements and low speed and dynamic characteristics requirements. It generally adopts a hard rail structure and is manual or semi-automatic. When the CNC machine tool requires programming and automation, the tailstock assembly can also adopt a linear rail structure, which is controlled by a screw and servo motor and is fully automatic.

[0004] When processing long workpieces, it is generally necessary to add an accessory center frame. The center frame is set between the spindle component and the tailstock component to assist in clamping and supporting to ensure the processing effect. When the tailstock guide rail is a hard rail structure, the center frame can share the tailstock guide rail with the tailstock component, and adopt the same moving and fixing method as the tailstock component, which is a manual or semi-automatic method. However, when the CNC machine tool requires automated coordination, the tailstock guide rail needs to adopt a linear rail structure. Since the movement of the tailstock component on the linear rail is guided by the cooperation of the slider and the linear rail, and the tailstock component needs to use the top to support the workpiece when working, the axial direction is fixed, while the center frame clamps and bears force in the radial direction of the workpiece, and is basically not subjected to force in the axial direction. To fix the slider part of the center frame to a point on the linear rail, a complete set of functional accessories such as hydraulic clamps are required to be added, which will undoubtedly lead to a significant increase in equipment costs. Therefore, under these restrictions, it is difficult for the center frame to adopt the same moving and fixing method as the tailstock component with a linear rail structure, and it cannot meet the requirements of automated control of the tailstock component. Utility Model Content

[0005] The utility model aims to provide a machine tool bed with a combined guide rail structure to solve the problems raised in the background technology in view of the shortcomings of the prior art.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A machine tool bed with a combined guide rail structure comprises a machine tool bed, wherein two guide rail mounting seats are arranged at intervals on the machine tool bed, and the upper surfaces of the two guide rail mounting seats are both mounted with linear rails, and a plurality of linear rail sliders are slidably connected to the linear rails, and the linear rail sliders are arranged in an array on the two linear rails, and tail stock components are mounted on the linear rail sliders arranged in the array, and the tail stock components are provided with ejectors, and the ejectors are used to fix the tail of a workpiece; a hard rail is arranged on the opposite side of the two guide rail mounting seats, and the hard rail is parallel to the upper surfaces of the guide rail mounting seats, and a hard rail slider is slidably connected to the two hard rails, and a center frame is mounted on the hard rail slider, and the center frame is used to assist in clamping the workpiece, and the linear rail is at least longer than the hard rail by a tail stock component, and the hard rail and the linear rail are independent of each other and do not contact each other.

[0008] As a preferred solution for a machine tool bed of a combined guide rail structure, the linear rail is provided with a plurality of mounting holes spaced apart along its length direction, the guide rail mounting seat is provided with a plurality of connecting holes spaced apart along its length direction, the mounting holes and the connecting holes have the same spacing, and the linear rail is locked and fixed to the guide rail mounting seat by fasteners passing through the mounting holes and the connecting holes respectively.

[0009] As a preferred solution for a machine tool bed with a combined guide rail structure, connecting grooves are opened inward on both sides of the linear rail, and the upper and lower ends of the connecting grooves are inclined outward to form a side trapezoidal structure, and the connecting surface of the linear rail slider matches the shape of the connecting groove.

[0010] As a preferred solution for a machine tool bed with a combined guide rail structure, the hard rail includes a first connecting part and a second connecting part, the first connecting part is parallel to the upper surface of the guide rail mounting seat, and the first connecting part extends outward to a side protruding from the guide rail mounting seat, the protruding side of the first connecting part is connected to the second connecting part, the second connecting part is tilted downward and connected to the side of the guide rail mounting seat, the first connecting part and the second connecting part are integrally formed to form a dovetail structure, and the hard rail slider is respectively in contact with the first connecting part and the second connecting part of the hard rails on both sides for sliding connection.

[0011] As a preferred solution for the machine tool bed of the combined guide rail structure, a spindle mounting surface is also provided on the machine tool bed, and the spindle mounting surface is located in the axial direction of the guide rail mounting seat.

[0012] Beneficial effects of the utility model:

[0013] The machine tool bed of the utility model adopts a structural design of a combination of linear rails and hard rails. The tailstock component uses a linear rail structure, and the center frame uses a hard rail structure. The two guide rail structures can be used simultaneously without interfering with each other, which not only meets the requirements of the tailstock component for automatic control and good operating characteristics, but also meets the requirements of the center frame for manual or semi-automatic control and high rigidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for use in the embodiments of the present utility model. Obviously, the drawings described below are only some embodiments of the present utility model, and for ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work.

[0015] Figure 1 The utility model is a three-dimensional structural schematic diagram of a machine tool bed with a combined guide rail structure.

[0016] Figure 2 It is a schematic diagram of the structure of a machine tool bed in a top view according to the utility model.

[0017] Figure 3 It is a side structural schematic diagram of the machine tool bed described in the utility model.

[0018] Figure 4 yes Figure 3 A magnified view of the structure of part A.

[0019] Figure 5 It is a schematic diagram of the relevant structure on the guide rail mounting seat described in the utility model.

[0020] In the figure:

[0021] 1. Machine tool bed; 2. Guide rail mounting seat; 3. Linear rail; 4. Linear rail slider; 5. Tail stock component; 6. Ejector; 7. Hard rail; 71. First connecting part; 72. Second connecting part; 8. Hard rail slider; 9. Center frame; 10. Mounting hole; 11. Connecting hole; 12. Connecting groove; 13. Spindle mounting surface; 100. Workpiece. DETAILED DESCRIPTION

[0022] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0023] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0024] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention 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. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between 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.

[0026] like Figure 1 and Figure 2As shown, the utility model provides a machine tool bed with a combined guide rail structure, including a machine tool bed 1, two guide rail mounting seats 2 are arranged on the machine tool bed 1 at intervals, the upper surfaces of the two guide rail mounting seats 2 are both mounted with linear rails 3, and a plurality of linear rail sliders 4 are slidably connected to the linear rails 3. In this embodiment, four linear rail sliders 4 are preferably arranged, and the four linear rail sliders 4 are arranged in an array on the two linear rails 3. Tail stock components 5 are installed on the linear rail sliders 4 arranged in the array, and the tail stock component 5 is provided with an ejector pin 6, which is mainly used to fix the tail of the workpiece 100; a hard rail 7 is arranged on the opposite side of the two guide rail mounting seats 2, and the hard rail 7 is parallel to the upper surface of the guide rail mounting seats 2, and a hard rail slider 8 is slidably connected to the two hard rails 7, and the hard rail slider 8 is mounted A center frame 9 is installed, and the center frame 9 is used to assist in clamping the workpiece 100. The center frame 9 does not need to share the linear rail 3 structure with the tailstock component 5. The tailstock component 5 can slide back and forth on the linear rail 3 through the linear rail slider 4 to adjust the position, and the center frame 9 can slide back and forth on the hard rail 7 through the hard rail slider 8 to adjust the position. The two guide rail structures can be used at the same time without interfering with each other, which not only meets the requirements of the tailstock component 5 for automated control and good operating characteristics, but also meets the requirements of the center frame 9 for manual or semi-automatic control and high rigidity; at the same time, since the center frame 9 is located between the spindle component and the tailstock component 5, its moving range also needs to be between the two. In order to save equipment costs, the hard rail 7 is at least one tailstock component 5 shorter than the linear rail 3.

[0027] like Figure 5 As shown, in order to facilitate the installation and disassembly of the linear rail 3, the linear rail 3 of this embodiment is provided with a plurality of installation holes 10 at intervals along its length direction, and the guide rail mounting seat 2 is provided with a plurality of connecting holes 11 at intervals along its length direction, and the installation holes 10 and the connecting holes 11 are at the same spacing. The linear rail 3 can be respectively passed through the installation holes 10 and the connecting holes 11 and locked and fixed to the guide rail mounting seat 2 by fasteners, thereby realizing the positioning of the linear rail 3.

[0028] like Figure 3 and Figure 4 As shown, the left and right sides of the linear rail 3 of this embodiment are both provided with connecting grooves 12 inwardly, and the upper and lower ends of the connecting grooves 12 are both inclined outwardly to form a side trapezoidal structure, and the connecting surface of the linear rail slider 4 matches the shape of the connecting groove 12 to facilitate the stable connection between the linear rail slider 4 and the linear rail 3.

[0029] Specifically, the hard rail 7 of this embodiment includes a first connecting portion 71 and a second connecting portion 72. The first connecting portion 71 is parallel to the upper surface of the guide rail mounting seat 2, and the first connecting portion 71 extends outward to a side protruding from the guide rail mounting seat 2. The protruding side of the first connecting portion 71 is connected to the second connecting portion 72. The second connecting portion 72 is tilted downward and connected to the side of the guide rail mounting seat 2. The first connecting portion 71 and the second connecting portion 72 are integrally formed to form a dovetail structure, and the hard rail slider 8 is respectively in contact with the first connecting portion 71 and the second connecting portion 72 of the hard rails 7 on both sides to be slidably connected.

[0030] In order to facilitate the installation of the spindle component, a spindle mounting surface 13 is also provided on the machine tool bed 1. The spindle mounting surface 13 is located in the axial direction of the guide rail mounting seat 2, so that the spindle component, the center frame 9 and the tailstock component 5 are all in the same axial direction to facilitate clamping the workpiece 100.

[0031] It should be noted that the above specific implementations are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art should understand that various modifications, equivalent substitutions, changes, etc. can be made to the present invention. However, as long as these changes do not deviate from the spirit of the present invention, they should be within the scope of protection of the present invention. In addition, some terms used in the specification and claims of this application are not restrictive, but are only for the convenience of description.

Claims

1. A machine tool bed with a combined guide rail structure, characterized in that: The invention comprises a machine tool bed (1), wherein two guide rail mounting seats (2) are arranged at intervals on the machine tool bed (1), and the upper surfaces of the two guide rail mounting seats (2) are both installed with linear rails (3), and the linear rails (3) are slidably connected with a plurality of linear rail sliders (4), and the linear rail sliders (4) are arranged in an array on the two linear rails (3), and the linear rail sliders (4) arranged in the array are installed with tailstock components (5), and the tailstock components (5) are provided with ejectors (6), and the ejectors (6) are used to fix the tail of a workpiece (100). The two guide rail mounting seats (2) are both provided with a hard rail (7) on the opposite side, the hard rail (7) is parallel to the upper surface of the guide rail mounting seat (2), and a hard rail slider (8) is slidably connected to the two hard rails (7), and a center frame (9) is installed on the hard rail slider (8), and the center frame (9) is used to assist in clamping the workpiece (100), the linear rail (3) is at least longer than the hard rail (7) by a tailstock component (5), and the hard rail (7) and the linear rail (3) are independent of each other and do not contact each other.

2. The machine tool bed of the combined guide rail structure according to claim 1, characterized in that: The linear rail (3) is provided with a plurality of mounting holes (10) at intervals along its length direction, and the guide rail mounting seat (2) is provided with a plurality of connecting holes (11) at intervals along its length direction, the mounting holes (10) and the connecting holes (11) are spaced at the same distance, and the linear rail (3) is locked and fixed to the guide rail mounting seat (2) by fasteners passing through the mounting holes (10) and the connecting holes (11) respectively.

3. The machine tool bed of the combined guide rail structure according to claim 2, characterized in that: The left and right sides of the linear rail (3) are both provided with connecting grooves (12) facing inwards, and the upper and lower ends of the connecting groove (12) are both inclined outwards to form a side trapezoidal structure, and the connecting surface of the linear rail slider (4) matches the shape of the connecting groove (12).

4. The machine tool bed of the combined guide rail structure according to claim 1, characterized in that: The hard rail (7) comprises a first connecting portion (71) and a second connecting portion (72), the first connecting portion (71) being parallel to the upper surface of the guide rail mounting seat (2), and the first connecting portion (71) extending outward to a side protruding from the guide rail mounting seat (2), the protruding side of the first connecting portion (71) being connected to the second connecting portion (72), the second connecting portion (72) being arranged to be tilted downward and connected to a side surface of the guide rail mounting seat (2), the first connecting portion (71) and the second connecting portion (72) being integrally formed to form a dovetail structure, and the hard rail slider (8) is respectively in contact with the first connecting portion (71) and the second connecting portion (72) of the hard rails (7) on both sides for sliding connection.

5. The machine tool bed with a combined guide rail structure according to claim 1, characterized in that: A spindle mounting surface (13) is also provided on the machine tool bed (1), and the spindle mounting surface (13) is located in the axial direction of the guide rail mounting seat (2).