Z-axis feeding mechanism of vertical machining center

Abstract

The utility model discloses a Z-axis feeding mechanism of a vertical machining center, and relates to a feeding mechanism of a machine tool. The feeding device comprises a mounting structure and a feeding component, the mounting structure comprises a stand column and a machine head, the feeding component comprises a servo motor and a Z-axis lead screw nut pair, first bosses are arranged on the stand column, Z-axis guide rails are mounted on the first bosses, a mounting groove is formed between the first bosses, and a first mounting base and a second mounting base are arranged on the mounting groove; a first transverse reinforcing rib is arranged between the first installation base and the first boss in the X-axis direction, a second transverse reinforcing rib is arranged between the second installation base and the first boss in the X-axis direction, and two vertical reinforcing ribs are arranged in the middle of the installation groove in the Z-axis direction at intervals. The servo motor is mounted at the top of the first mounting seat; the two ends of the Z-axis lead screw nut pair are installed on the first installation base and the second installation base respectively. According to the Z-axis feeding mechanism, it is guaranteed that the mounting position of the Z-axis lead screw nut pair has good bearing capacity and stability, and the movement precision of the machine head and the main shaft is guaranteed.

Description

Technical Field

[0001] The utility model relates to a feeding mechanism of a machine tool, in particular to a Z-axis feeding mechanism of a vertical machining center. Background Art

[0002] The feed mechanism of the vertical machining center is an important component of the machine tool, among which the Z-axis feed mechanism is arranged on the column to realize the precise movement of the machine head and the spindle along the Z-axis.

[0003] Chinese patent document CN204339416U discloses a Z-axis feed drive component installation structure in a Z-axis feed system, wherein the Z-axis feed drive component includes a feed servo motor and a Z-axis screw nut pair, and the installation structure includes a column, a motor seat, a bearing cover plate, a lower bearing seat, a bearing seat bushing and a bearing seat pre-tightening nut. The upper end journal of the Z-axis screw is supported and installed in the bearing seat through a bearing member, and a wing-shaped support connecting block is provided on the outer wall of the bearing seat, and the wing-shaped support connecting block is supported on the top of the vertical slide; the lower end journal of the Z-axis screw is supported and installed in the bearing seat bushing through a bearing member, and the bearing seat bushing is installed in the lower bearing seat, and a wing-shaped support block is provided on the outer wall of the lower bearing seat, and the wing-shaped support block is correspondingly embedded in the support groove at the lower part of the vertical slide. The bearing seat and the lower bearing seat in this patent are connected in the vertical slide through the wing-shaped support connecting block and the wing-shaped support block respectively. However, the connection position of the corresponding bearing seat and the lower bearing seat in the vertical slide lacks reinforcing structures such as reinforcing ribs. When the Z-axis feed drive component is working, the Z-axis screw nut pair drives the machine head and the main shaft to move up and down along the Z-axis. Structures such as the machine head and the main shaft will generate a certain load on the Z-axis screw nut pair. Therefore, the installation position of the Z-axis screw nut pair needs to have good load-bearing capacity and stability. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a Z-axis feeding mechanism of a vertical machining center, to ensure that the installation position of the Z-axis screw nut pair has good bearing capacity and stability, and to ensure the movement accuracy of the machine head and the spindle.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A Z-axis feed mechanism of a vertical machining center comprises a mounting structure and a feed component, the mounting structure comprises a column and a machine head, the feed component is arranged between the column and the machine head, and comprises a servo motor and a Z-axis screw nut pair, first bosses are arranged on both sides of the front of the column along the Z-axis direction, a Z-axis guide rail is installed on the first boss, a slider of the Z-axis guide rail is fixedly connected to the machine head, a mounting groove is arranged between the first bosses, the mounting groove is located at the upper part and the lower part of the column and respectively provided with a first mounting seat and a second mounting seat, a first transverse reinforcing rib is arranged between the first mounting seat and the first bosses on both sides along the X-axis direction, a second transverse reinforcing rib is arranged between the second mounting seat and the first bosses on both sides along the X-axis direction, two vertical reinforcing ribs are arranged at intervals in the middle of the mounting groove along the Z-axis direction, and the two vertical reinforcing ribs intersect with the first mounting seat and the second mounting seat; the servo motor is installed on the top of the first mounting seat; the Z-axis screw nut pair is arranged between the two vertical reinforcing ribs, and the two ends of the Z-axis screw nut pair are respectively installed on the first mounting seat and the second mounting seat.

[0007] In some embodiments, the first mounting seat includes four first mounting plates vertically fixed in the mounting groove, and the four first mounting plates form a rectangular frame; the second mounting seat includes two second mounting plates vertically fixed in the mounting groove, and the two second mounting plates are arranged along the Z-axis direction and are parallel to each other; the Z-axis screw nut pair includes a Z-axis screw and a nut, the nut is installed on the machine head and is threadedly connected with the Z-axis screw, the upper end journal of the Z-axis screw is provided with an upper bearing assembly, the upper bearing assembly is installed on the first mounting plate located at the bottom, the lower end journal of the Z-axis screw is provided with a lower bearing assembly and a lower bearing seat, the lower bearing assembly is installed on the lower bearing seat, and wing-shaped connecting plates are provided on both sides of the lower bearing seat, and the wing-shaped connecting plates are installed and fixed on the second mounting plate. In at least one embodiment, a motor fixing plate is provided on the servo motor, and the motor fixing plate is installed on the first mounting plate located at the top; the upper end of the Z-axis screw is fixedly connected to the output shaft of the servo motor.

[0008] Compared with the prior art, the present invention achieves at least the following beneficial effects:

[0009] The utility model provides first bosses on both sides of the front face of the column along the Z-axis direction, the Z-axis guide rail is installed on the first boss, a mounting groove is provided between the first bosses, and the mounting groove is located at the upper and lower parts of the column and respectively provided with a first mounting seat and a second mounting seat, a first transverse reinforcing rib is provided between the first mounting seat and the first bosses on both sides along the X-axis direction, a second transverse reinforcing rib is provided between the second mounting seat and the first bosses on both sides along the X-axis direction, two vertical reinforcing ribs are provided at intervals along the Z-axis direction in the middle part of the mounting groove, the two vertical reinforcing ribs intersect with the first mounting seat and the second mounting seat, and the two ends of the Z-axis screw nut pair are respectively installed on the first mounting seat and the second mounting seat, and the strength and rigidity of the mounting position of the Z-axis screw nut pair can be enhanced by the first transverse reinforcing rib, the second transverse reinforcing rib and the two vertical reinforcing ribs, that is, the strength and rigidity of the first mounting seat and the second mounting seat can be enhanced, the bearing capacity and stability can be improved, and it can be ensured that the machine head and the spindle on the machine head can run stably, and the processing accuracy can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] One or more embodiments of the present invention will now be described by way of example only with reference to the accompanying drawings, in which:

[0011] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application;

[0012] Figure 2 This is a schematic diagram of the structure of the pillars of an embodiment of the present application;

[0013] Figure 3 This is a schematic diagram of the structure of the machine head according to an embodiment of the present application;

[0014] Figure 4 This is a top view of the nose of an embodiment of the present application.

[0015] The numbers in the figure are: 1, column; 2, machine head; 3, feed component; 4, servo motor; 41, motor fixing plate; 5, Z-axis screw nut pair; 51, Z-axis screw; 52, nut; 6, first boss; 61, mounting groove; 7, Z-axis guide rail; 71, slider; 8, first mounting seat; 81, first mounting plate; 9, second mounting seat; 91, second mounting plate; 10, first transverse reinforcement rib; 20, second transverse reinforcement rib; 30, vertical reinforcement rib; 40, upper bearing assembly; 50, lower bearing assembly; 60, lower end bearing seat; 601, wing-shaped connecting plate; 70, second boss; 701, limiting convex strip; 702, pressure block; 703, connecting part. DETAILED DESCRIPTION

[0016] The present invention will be described in detail below with reference to the exemplary embodiments in the accompanying drawings. However, it should be understood that the present application can be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. These embodiments are provided here to make the disclosure of the present application more complete and to fully convey the concept of the present application to those skilled in the art.

[0017] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application 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 a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "several" and "multiple" mean two or more, unless otherwise clearly and specifically defined. In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In this application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature can include the first and second features directly contacting, or it can include the first and second features not being in direct contact but contacting through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0018] like Figures 1 to 4As shown, the Z-axis feed mechanism of the vertical machining center of this embodiment includes a mounting structure and a feed component 3, the mounting structure includes a column 1 and a head 2, the feed component 3 is arranged between the column 1 and the head 2, and includes a servo motor 4 and a Z-axis screw nut pair 5, first bosses 6 are arranged on both sides of the front of the column 1 along the Z-axis direction, a Z-axis guide rail 7 is installed on the first boss 6, a slider 71 of the Z-axis guide rail 7 is fixedly connected to the head 2, a mounting groove 61 is arranged between the first bosses 6, the mounting groove 61 is located at the upper and lower parts of the column 1, and a first mounting seat 8 and a second mounting seat 9 are respectively arranged, and the first A first transverse reinforcing rib 10 is provided between a mounting seat 8 and the first bosses 6 on both sides along the X-axis direction, a second transverse reinforcing rib 20 is provided between a second mounting seat 9 and the first bosses 6 on both sides along the X-axis direction, two vertical reinforcing ribs 30 are provided at intervals in the middle of the mounting groove 61 along the Z-axis direction, and the two vertical reinforcing ribs 30 intersect with the first mounting seat 8 and the second mounting seat 9; the servo motor 4 is installed on the top of the first mounting seat 8; the Z-axis screw nut pair 5 is provided between the two vertical reinforcing ribs 30, and the two ends of the Z-axis screw nut pair 5 are respectively installed on the first mounting seat 8 and the second mounting seat 9. The first transverse reinforcing rib 10 on the first mounting seat 8, the second transverse reinforcing rib 20 on the second mounting seat 9, and the two vertical reinforcing ribs 30 between the first mounting seat 8 and the second mounting seat 9 can significantly enhance the strength and rigidity of the first mounting seat 8 and the second mounting seat 9, ensure the stable operation of the feeding component 3, and can withstand the load of the machine head 2 and the spindle.

[0019] refer to Figure 2 and Figure 3 Optionally, the first mounting seat 8 includes four first mounting plates 81 vertically fixed in the mounting groove 61, and the four first mounting plates 81 form a rectangular frame; the second mounting seat 9 includes two second mounting plates 91 vertically fixed in the mounting groove 61, and the two second mounting plates 91 are arranged along the Z-axis direction and parallel to each other; the Z-axis screw nut pair 5 includes a Z-axis screw 51 and a nut 52, the nut 52 is installed on the machine head 2 and is threadedly connected with the Z-axis screw 51, the upper end journal of the Z-axis screw 51 is provided with an upper bearing assembly 40, the upper bearing assembly 40 is installed on the first mounting plate 81 located at the bottom, the lower end journal of the Z-axis screw 51 is provided with a lower bearing assembly 50 and a lower end bearing seat 60, and the lower bearing assembly 50 is installed on the lower end bearing seat 60; wing-shaped connecting plates 601 are provided on both sides of the bearing seat 60, optionally, a through hole is provided on the wing-shaped connecting plate 601, and a screw hole corresponding to the through hole is provided on the second mounting plate 91, and the wing-shaped connecting plate 601 is fixedly connected to the second mounting plate 91 by screws.

[0020] Furthermore, a motor fixing plate 41 is provided on the servo motor 4, and the motor fixing plate 41 is installed on the first mounting plate 81 located at the top. Since the first mounting seat 8 is provided with a first transverse reinforcement rib 10 and a vertical reinforcement rib 30, it can withstand the load of the servo motor 4; the upper end of the Z-axis screw rod 51 is fixedly connected to the output shaft of the servo motor 4.

[0021] Optionally, the Z-axis guide rail 7 is a roller-type guide rail; the roller-type Z-axis guide rail 7 is in line contact with the slider 71 through rollers. Compared with the point contact method of the ball-type guide rail, it can achieve a smaller elastic deformation when subjected to the same load, thereby meeting the high-precision application of the Z-axis guide rail 7 in heavy-load processing and ensuring the processing accuracy of the tool on the spindle of the machine head 2.

[0022] refer to Figure 3 and Figure 4 Optionally, a second boss 70 is provided on both sides of the mounting end of the machine head 2, and the second boss 70 is fixedly connected to the slider 71, and a limiting convex strip 701 is provided on the inner side wall of the second boss 70 on one side, and a pressure block 702 is provided on the outer side wall, and the slider 71 is arranged between the limiting convex strip 701 and the pressure block 702, and the pressure block 702 plays a role in pressing and positioning the slider 71, and the limiting convex strip 701 cooperates with the pressure block 702 to prevent the slider 71 from being displaced, thereby ensuring the movement accuracy of the machine head 2. Furthermore, a connecting portion 703 for installing the nut 52 is provided between the second bosses 70, and reinforcing ribs are provided between the connecting portion 703 and the second bosses 70 on both sides, and between the connecting portion 703 and the mounting end of the machine head 2, thereby ensuring the structural rigidity and strength of the connecting portion 703.

[0023] It should be understood that all the above embodiments are illustrative rather than restrictive, and any modifications, equivalent changes and modifications made by those skilled in the art to the specific embodiments described above under the conception of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A Z-axis feed mechanism of a vertical machining center, comprising a mounting structure and a feed component (3), wherein the mounting structure comprises a column (1) and a machine head (2), the feed component (3) is arranged between the column (1) and the machine head (2), and comprises a servo motor (4) and a Z-axis screw nut pair (5), characterized in that: First bosses (6) are provided on both sides of the front of the column (1) along the Z-axis direction, a Z-axis guide rail (7) is installed on the first boss (6), a slider (71) of the Z-axis guide rail (7) is fixedly connected to the machine head (2), a mounting groove (61) is provided between the first bosses (6), the mounting groove (61) is located at the upper part and the lower part of the column (1) and respectively provided with a first mounting seat (8) and a second mounting seat (9), a first transverse reinforcing rib (10) is provided between the first mounting seat (8) and the first bosses (6) on both sides along the X-axis direction, a second transverse reinforcing rib (20) is provided between the second mounting seat (9) and the first bosses (6) on both sides along the X-axis direction, and two vertical reinforcing ribs (30) are provided at intervals in the middle of the mounting groove (61) along the Z-axis direction, and the two vertical reinforcing ribs (30) intersect with the first mounting seat (8) and the second mounting seat (9); The servo motor (4) is mounted on the top of the first mounting seat (8); The Z-axis screw nut pair (5) is arranged between the two vertical reinforcing ribs (30), and the two ends of the Z-axis screw nut pair (5) are respectively mounted on the first mounting seat (8) and the second mounting seat (9).

2. The Z-axis feed mechanism of the vertical machining center according to claim 1, characterized in that: The first mounting seat (8) comprises four first mounting plates (81) vertically fixed to the mounting groove (61), and the four first mounting plates (81) form a rectangular frame; the second mounting seat (9) comprises two second mounting plates (91) vertically fixed to the mounting groove (61), and the two second mounting plates (91) are arranged along the Z-axis direction and are parallel to each other; the Z-axis screw rod and nut pair (5) comprises a Z-axis screw rod (51) and a nut (52), and the nut (52) is mounted on the machine head (2) and is connected to the Z-axis screw rod (51) ) threaded connection, the upper end journal of the Z-axis screw rod (51) is provided with an upper bearing assembly (40), and the upper bearing assembly (40) is mounted on the first mounting plate (81) located at the bottom, the lower end journal of the Z-axis screw rod (51) is provided with a lower bearing assembly (50) and a lower bearing seat (60), and the lower bearing assembly (50) is mounted on the lower bearing seat (60), and wing-shaped connecting plates (601) are provided on both sides of the lower bearing seat (60), and the wing-shaped connecting plates (601) are mounted and fixed on the second mounting plate (91).

3. The Z-axis feed mechanism of the vertical machining center according to claim 2, characterized in that: The servo motor (4) is provided with a motor fixing plate (41), and the motor fixing plate (41) is mounted on a first mounting plate (81) located at the top; the upper end of the Z-axis screw rod (51) is fixedly connected to the output shaft of the servo motor (4).

4. The Z-axis feed mechanism of the vertical machining center according to claim 1, characterized in that: The Z-axis guide rail (7) is a roller-type guide rail.

5. The Z-axis feed mechanism of the vertical machining center according to claim 1, characterized in that: Second bosses (70) are provided on both sides of the mounting end of the machine head (2), the second bosses (70) are fixedly connected to the slider (71), and the inner side wall of the second boss (70) on one side is provided with a limiting convex strip (701), and the outer side wall is provided with a pressure block (702), and the slider (71) is arranged between the limiting convex strip (701) and the pressure block (702).

6. The Z-axis feed mechanism of the vertical machining center according to claim 5, characterized in that: A connecting portion (703) for mounting the nut (52) is provided between the second bosses (70), and reinforcing ribs are provided between the connecting portion (703) and the second bosses (70) on both sides, and between the connecting portion (703) and the mounting end of the machine head (2).

Images