Reverse stepped mounting structure of virtual Y-axis saddle

Abstract

The utility model belongs to the technical field of machine tools, and discloses a reverse stepped mounting structure of a virtual Y-axis saddle, which comprises a lathe bed provided with a Z-direction guide rail at the rear part and a saddle assembly provided with a Z-axis saddle at the bottom end, an X1-direction sliding system is arranged at the top of the saddle assembly, the X1-direction sliding system drives the tool turret assembly to slide and move in the X1 direction to form a virtual Y axis perpendicular to the X1 direction, the Z-direction guide rail is arranged in a step shape with the front portion higher than the rear portion, and the Z-axis saddle is provided with a Z-direction sliding block in sliding fit with the Z-direction guide rail. The Z-direction sliding block is arranged in a step shape with the front portion higher than the rear portion, so that the gravity center of the saddle assembly deviates backwards, obliquely and downwards. The saddle assembly and the Z-direction guide rail are higher in mounting and matching stability, better in torsion resistance and better in rigidity, vibration of the saddle assembly in the machining process can be further reduced, and the machining stability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of machine tools, and in particular relates to a saddle installation structure of a machine tool. Background Art

[0002] When the traditional vertical Y-axis structure machine tool is processing in counterclockwise rotation, the force exerted by the workpiece on the tool is in the same direction as the movement direction of the Y-axis guide rail and the screw rod, which is prone to tool vibration and affects the processing accuracy. By adopting the interpolation Y-axis structure, that is, the virtual Y-axis, the force exerted by the workpiece on the tool and the Y-axis guide rail and the screw rod are at an angle during counterclockwise processing, which is not easy to cause tool vibration and can ensure processing accuracy; however, the existing machine tool interpolation Y-axis structure is generally disclosed in the Chinese Utility Model (Announcement No. CN218192610) and the Chinese Utility Model (Announcement No. CN220574761), and usually sets a front low and rear high step-type Z-guide rail at the rear of the bed to slide the saddle assembly, the overall installation center of gravity of the saddle assembly is tilted forward, and the installation coordination of the saddle assembly and the guide rail is relatively poor in torsion resistance and rigidity, and poor stability. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a virtual Y-axis saddle reverse stepped installation structure, and the installation cooperation of the saddle assembly on the Z guide rail has better torsional resistance, better rigidity and higher stability.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A virtual Y-axis saddle reverse step-type installation structure comprises a bed body with a Z-guide rail at the rear and a saddle assembly with a Z-axis saddle at the bottom, and an X-axis saddle assembly at the top of the saddle assembly. 1 To the sliding system and by the X 1 The slide system drives the turret assembly along the X 1 The sliding activity forms a vertical 1 The Z-axis is a virtual Y-axis, the Z-guide rail is arranged in a stepped shape with high front and low rear, the Z-axis saddle is provided with a Z-slider which slidably cooperates with the Z-guide rail, and the Z-slider is arranged in a stepped shape with high front and low rear so that the center of gravity of the saddle assembly is shifted obliquely downward and backward.

[0006] The utility model has the following beneficial effects:

[0007] Compared with the forward-inclined overall installation center of gravity of the saddle assembly when the guide rail is stepped in a high-front-and-low-back setting, the sliding cooperation between the Z-direction slider and the Z-direction guide rail of the high-front-and-low-back step type makes the overall installation center of gravity of the saddle assembly on the Z-direction guide rail be adjusted and offset downward and backward. The installation cooperation between the saddle assembly and the Z-guide rail has higher stability, better torsional resistance, and better rigidity, which helps to further reduce the vibration of the saddle assembly during processing and improve processing stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A top view of the machine tool involved in the utility model;

[0009] Figure 2 for Figure 1 A perspective view of the machine tool shown;

[0010] Figure 3 for Figure 1 A right side view of the machine tool shown;

[0011] Figure 4 for Figure 1 a side view of the saddle assembly of the machine tool shown;

[0012] Figure 5 for Figure 1 A perspective view of the saddle assembly of the machine tool shown.

[0013] Figure: 1, bed; 2, main spindle system; 3, sub-spindle system; 4, traverse guide rail; 41, screw drive system; 5, Z guide rail; 51, Z drive system; 6, bed saddle assembly; 61, Z-axis bed saddle; 62, Z-slider; 63, Y-axis saddle; 64, X 1 Slide system. DETAILED DESCRIPTION

[0014] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, so as to more clearly understand the technical concept to be protected by the present invention.

[0015] like Figures 1 to 4 The machine tool shown includes a bed 1, and a main spindle system 2 and a sub-spindle system 3 are relatively arranged at the front of the bed 1, wherein the main spindle system 2 is fixed on the left side and the sub-spindle system 3 is arranged on the right side. A transverse guide rail 4 with a lower front and a higher rear is installed at the front of the bed 1, and the sub-spindle box of the sub-spindle system 3 is slidably matched with the transverse guide rail 4 through a bottom slider. The bed 1 is installed with a screw drive system 41, which is composed of a screw nut assembly driven by a motor, and the nut is connected to the bottom of the sub-spindle box of the sub-spindle system 3. The screw drive system 41 can drive the sub-spindle system 3 to move back and forth in a straight line along the transverse guide rail 4 to adjust the relative position of the sub-spindle system 3 and the main spindle system 2.

[0016] The rear part of the bed 1 is provided with a Z-guide rail 5 with a high front and a low rear step type, and a saddle assembly 6 is slidably mounted on the Z-guide rail 5. A Z-axis saddle 61 is provided at the bottom of the saddle assembly 6. A Z-direction slider 62 with a high front and a low rear step type is provided at the bottom of the Z-axis saddle 61. The saddle assembly 6 is driven by a Z-direction drive system 51 to reciprocate along the Z-guide rail 5 in a straight line. Figure 1The Z-direction is used to adjust the processing position of the workpiece, and cooperate with the main spindle system 2 and the auxiliary spindle system 3. The Z-direction drive system 51 is composed of a motor-driven screw installed on the bed 1, and a nut connected to the bottom of the Z-axis saddle 61 and matched with the screw thread. Compared with the forward tilt of the overall installation center of gravity of the saddle assembly when the Z-guide rail is set in a stepped manner with a low front and a high rear, the sliding cooperation between the Z-direction slider 62 with a high front and a low rear step and the Z-guide rail 5 makes the overall installation center of gravity of the saddle assembly 6 on the Z-guide rail be adjusted and offset backward and downward. The installation cooperation stability of the saddle assembly 6 and the Z-guide rail 5 is higher, the torsion resistance is better, and the rigidity is better, which helps to further reduce the vibration of the saddle assembly during processing and improve the processing stability.

[0017] In the specific implementation, the saddle assembly 6 in this embodiment is as follows Figure 5 The saddle 61 and the Y-axis saddle 63 are separated and slidably connected, and an X-axis saddle 62 is provided on the top of the Y-axis saddle 63. 1 Towards sliding system 64, by X 1 The slide system 64 drives the turret assembly along the X 1 The turret assembly forms a vertical X 1 The virtual Y axis can reduce the vibration of the tool when the workpiece rotates counterclockwise. 1 The sliding system 64 and the vertical 1 The virtual Y axis belongs to the existing general settings, X 1 The sliding system 64 is a sliding drive system composed of a slider, a guide rail and a motor screw nut, or a sliding drive system driven by a linear motor, which will not be elaborated here.

[0018] In other embodiments, the Z-axis saddle 61 and the Y-axis slide saddle 63 may also adopt an integral structure. When implemented, the front-high-back-low stepped fit between the Z-axis saddle 61 and the Z-guide rail 5 can improve the stability, torsion resistance and rigidity of the above-mentioned structural saddle assembly when installed on the bed rail.

[0019] In other embodiments, the Z-axis drive system 51 can also be driven by a linear motor. During installation, the Z-axis primary coil of the linear motor is installed at the bottom of the Z-axis saddle 61, and the Z-axis secondary magnetic plate is installed on the bed surface of the bed 1. A Z-axis reading head is arranged on the bed 1, and a Z-axis grating scale is arranged at the corresponding position of the Z-axis saddle 61. The movement of the saddle assembly 6 in the Z-axis direction transmits kinetic energy through the Z-axis linear motor, and the Z-axis grating scale feeds back the Z-axis position signal to achieve full closed-loop feedback, full closed-loop control, higher precision and longer life.

[0020] For those skilled in the art, various other corresponding changes and modifications can be made according to the technical solutions and concepts described above, and all of these changes and modifications should fall within the protection scope of the claims of the utility model.

Claims

1. A virtual Y-axis saddle reverse stepped installation structure, comprising a bed (1) with a Z-axis guide rail (5) at the rear and a saddle assembly (6) with a Z-axis saddle (61) at the bottom, an X1-direction sliding system (64) being arranged on the top of the saddle assembly (6) and the X1-direction sliding system (64) driving the turret assembly to slide along the X1 direction to form a virtual Y-axis perpendicular to the X1 direction, characterized in that: The Z-direction guide rail (5) is arranged in a stepped manner with a height higher at the front and a height lower at the rear, and the Z-axis saddle (61) is provided with a Z-direction slider (62) that slidably cooperates with the Z-direction guide rail (5). The Z-direction slider (62) is arranged in a stepped manner with a height higher at the front and a height lower at the rear, so that the center of gravity of the saddle assembly (6) is shifted obliquely downward and rearward.

2. The virtual Y-axis saddle reverse stepped installation structure according to claim 1, characterized in that: The Z-direction sliding block (62) is arranged at the bottom of the Z-axis saddle (61).

3. The virtual Y-axis saddle reverse stepped installation structure according to claim 2, characterized in that: A Z-direction drive system (51) for driving the saddle assembly (6) to move along the Z direction is provided between the bed (1) and the Z-axis saddle (61).

4. The virtual Y-axis saddle reverse stepped installation structure according to claim 3, characterized in that: The Z-axis drive system (51) is composed of a motor-driven screw installed on the bed (1) and a nut connected to the bottom of the Z-axis saddle (61) and matching the screw thread.

5. The virtual Y-axis saddle reverse stepped installation structure according to claim 3, characterized in that: The Z-axis drive system (51) comprises a linear motor having a Z-axis primary coil mounted on the bottom of the Z-axis saddle (61), a Z-axis secondary magnetic plate mounted on the bed (1), a Z-axis reading head arranged on the bed (1), and a Z-axis grating ruler arranged corresponding to the Z-axis reading head.

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