Numerical control horizontal type screw rod milling machine

Abstract

The utility model provides a numerical control horizontal type screw rod milling machine which comprises a lathe, a spindle box, a tailstock and a cutting device, the spindle box and the tailstock are arranged on the lathe in a matched mode and used for clamping and rotating a workpiece, and the lathe is provided with a plurality of center frame devices in parallel in the axis direction of the workpiece. The center frame device comprises a supporting assembly, a pressing assembly and a plurality of adjusting wheel sets, the supporting assembly is arranged below a workpiece and connected with a lathe, and the swing end of the pressing assembly is arranged above the side of the workpiece and rotationally connected with the supporting assembly. Part of the adjusting wheel sets are arranged on the supporting assembly and used for supporting the rotary side face of a workpiece in a rolling mode, and the other part of the adjusting wheel sets are arranged on the pressing assembly and used for being matched with the pressing assembly to achieve rolling pressing or loosening of the rotary side face of the workpiece. According to the utility model, the plurality of center frame devices are arranged to clamp and fix the rotary side surfaces at the two ends of the workpiece, so that vibration and bending can be avoided when a longer shaft workpiece is cut, and the machining precision is improved.

Description

Technical Field

[0001] The utility model relates to a numerical control horizontal screw rod milling machine. Background Art

[0002] The numerical control horizontal screw rod milling machine can be used for machining workpieces of deep drill bits of shaft-like rotating bodies in petroleum machinery, and can automatically complete the cutting process of multi-head spiral grooves. However, when the current milling machine cuts long shaft-like workpieces, the workpieces are prone to vibration and bending under force, and the machining accuracy cannot be guaranteed, resulting in waste of workpieces; therefore, the existing technology still needs to be improved and developed. Summary of the Invention

[0003] In view of the deficiencies in the above problems, the utility model provides a numerical control horizontal screw rod milling machine.

[0004] To achieve the above object, the utility model provides a numerical control horizontal screw rod milling machine, including a lathe, a spindle box, a tailstock, and a cutting device. The spindle box and the tailstock are cooperatively arranged on the lathe and are used for clamping and rotating the workpiece. A plurality of center rest devices are arranged in parallel along the axis direction of the workpiece on the lathe. The center rest device includes a support assembly, a pressing assembly, and a plurality of adjusting wheel groups. The support assembly is arranged below the workpiece and is connected to the lathe. The swinging end of the pressing assembly is arranged above the side of the workpiece and is rotatably connected to the support assembly. Some of the adjusting wheel groups are arranged on the support assembly and are used for forming a rolling support for the rotating side surface of the workpiece. The other part of the adjusting wheel groups is arranged on the pressing assembly and is used for cooperating with the pressing assembly to realize rolling pressing or loosening the rotating side surface of the workpiece.

[0005] Further, a main guide rail group is arranged along the axis direction of the workpiece below the workpiece on the lathe. The center rest device further includes a base. The support assembly, the pressing assembly, and the plurality of adjusting wheel groups are arranged above the base. The base is slidably arranged on the main guide rail group. A hydraulic system is arranged on the side of the lathe. The hydraulic system is used for moving the base along the main guide rail group.

[0006] Further, the support assembly includes a machine base and a plurality of mounting cylinders I. The machine base is fixedly connected to the base. The plurality of mounting cylinders I are fixedly arranged on the machine base at intervals around the axis of the workpiece and are used for mounting some of the adjusting wheel groups.

[0007] Further, the pressing assembly includes a hydraulic driving device I hinged to the base, a swing arm hinged to the support assembly, and a plurality of mounting cylinders II. The plurality of mounting cylinders II are arranged at one end of the swing arm close to the workpiece and are used for mounting the other part of the adjusting wheel groups. The output end of the hydraulic driving device I is hinged to the other end of the swing arm and is used for driving the swing arm to swing.

[0008] Further, the adjusting wheel set includes a roller and an adjusting member. The roller is rotatably provided at one end of the adjusting member close to the workpiece, and the adjusting member is provided on the supporting assembly or the pressing assembly for adjusting the gap between the roller and the axis of the workpiece.

[0009] Further, the tailstock includes a tailstock body, a sleeve, a first chuck, and a second hydraulic driving device. The tailstock body is slidably provided on the main guide rail set and is driven by a hydraulic system to move along the main guide rail set. The sleeve is slidably provided in the tailstock body. The first chuck is rotatably provided at one end of the sleeve. The second hydraulic driving device is fixedly provided in the tailstock body, and the output end of the second hydraulic driving device is connected to the other end of the sleeve to drive the first chuck to clamp or release the end of the workpiece.

[0010] Further, the headstock is fixedly provided on the lathe and includes a box body, a first driving device, a worm and worm gear assembly, and a second chuck. The first driving device is fixedly provided in the box body and drives the second chuck to rotate through the worm and worm gear assembly.

[0011] Further, a secondary guide rail set is provided on the lathe along the axis direction of the workpiece. A second driving device and a first workbench are provided on the lathe. The first workbench is slidably provided on the secondary guide rail set. The second driving device drives the first workbench to move along the secondary guide rail set through a lead screw. A slide rail portion is provided on the first workbench along the horizontal axis direction perpendicular to the axis of the workpiece. A third driving device and a second workbench are provided on the first workbench. The second workbench is slidably provided on the slide rail portion. The third driving device drives the second workbench to move along the slide rail portion through a lead screw. The cutting device is rotatably provided on the second workbench.

[0012] Further, the cutting device is rotatably connected to the second workbench through a rotating table, and a fourth driving device for driving the rotating table to rotate is provided in the second workbench.

[0013] Further, a plurality of chip discharge ports are provided below the workpiece on the lathe, and a chip collection box is provided outside the lathe. A chip conveyor is provided below the lathe opposite to the chip discharge ports. The chip conveyor is used for collecting the chip slag falling through the chip discharge ports and sending the chip slag into the chip collection box.

[0014] The beneficial effects of the present utility model compared with the prior art are as follows: By providing a plurality of steady rest devices to clamp and fix the rotary sides at both ends of the workpiece, the present utility model can avoid vibration and bending during the cutting of long shaft workpieces, and improve the machining accuracy. Description of the Drawings

[0015] Figure 1 is a perspective view of a numerically controlled horizontal screw milling machine of the present utility model;

[0016] Figure 2 is a perspective view of the steady rest device involved in this solution;

[0017] Figure 3 A perspective view of the lathe involved in this solution;

[0018] Figure 4 A structural schematic diagram of the headstock (excluding the housing) involved in this solution;

[0019] Figure 5 An assembly schematic diagram of the cutting device, drive device II, drive device III, workbench I, workbench II, and rotary table involved in this solution;

[0020] Figure 6 A structural schematic diagram of the milling machine (including the workpiece) involved in this solution. Specific implementation manners

[0021] As Figures 1 to 6 shown, a numerically controlled horizontal screw rod milling machine according to an embodiment of the present utility model includes a lathe 1, a headstock 2, a tailstock 3, and a cutting device 4; the lathe 1 is made by resin sand molding and is cast from high-quality HT300 cast iron, so that it has a good appearance and strength. Moreover, the internal rib plates of the lathe 1 are optimized by the finite element method with reasonable layout, having excellent anti-sectional distortion ability. At the same time, the cavity of the lathe 1 adopts a sand-sealing structure, which can increase the overall damping of the lathe 1 and effectively improve the vibration resistance of the lathe 1.

[0022] Furthermore, as Figures 1 to 6 shown, in this embodiment, the headstock 2 and the tailstock 3 are cooperatively arranged on the lathe 1 and are used for clamping and rotating the workpiece; among them, the headstock 2 is fixedly arranged on the lathe 1. The headstock 2 includes a housing 24, a drive device I 25, a worm and worm gear assembly 26, and a chuck II 27. The worm and worm gear assembly 26 is rotatably connected to the housing 24. The drive device I 25 is fixedly arranged in the housing 24 and drives the chuck II 27 to rotate through the worm and worm gear assembly 26; the tailstock 3 includes a tailstock body 20, a sleeve 21, a chuck I 22, and a hydraulic drive device II 23. The sleeve 21 is slidably arranged in the tailstock body 20. The chuck I 22 is rotatably arranged at one end of the sleeve 21. The hydraulic drive device II 23 is fixedly arranged in the tailstock body 20. The output end of the hydraulic drive device II 23 is connected to the other end of the sleeve 21 and further drives the chuck I 22 and the chuck II 27 to cooperate to clamp or loosen the end of the workpiece. The chuck I 22 and the chuck II 27 can be replaced according to requirements.

[0023] Furthermore, as Figures 1 to 6 shown, in this embodiment, the lathe 1 is provided with a main guide rail group 5 along the axial direction of the workpiece below the workpiece. The tailstock body 20 is slidably arranged on the main guide rail group 5. A hydraulic system is arranged on the side of the lathe 1. The hydraulic system drives the tailstock body 20 to move along the main guide rail group 5 to adjust the distance between the headstock 2 and the tailstock 3 and further adapt to workpieces of different lengths.

[0024] Furthermore, asFigures 1 to 6 As shown in the figure, the cutting device 4 in this embodiment is arranged on one side of the lathe 1 close to the workpiece and is used for cutting the spiral groove of the workpiece. On the lathe 1, a secondary guide rail group 6 is arranged along the axis direction of the workpiece. A second driving device 28 and a first workbench 29 are arranged on the lathe 1. The first workbench 29 is slidably arranged on the secondary guide rail group 6. The second driving device 28 drives the first workbench 29 to move along the secondary guide rail group 6 through a lead screw. A slide rail part 291 is arranged on the first workbench 29 along the horizontal axis direction perpendicular to the axis of the workpiece. A third driving device 30 and a second workbench 31 are arranged on the first workbench 29. The second workbench 31 is slidably arranged on the slide rail part 291. The third driving device 30 drives the second workbench 31 to move along the slide rail part 291 through a lead screw. The cutting device 4 is rotationally connected to the second workbench 31 through a rotating table 32. A fourth driving device (not marked in the figure) for driving the rotating table 32 to rotate is arranged in the second workbench 31. The cutting device 4 can not only adjust its position along the axis direction of the workpiece, but also adjust its position along the horizontal axis direction perpendicular to the axis of the workpiece, and can also rotate relative to the workpiece, which is convenient for the cutting use of the cutting device 4.

[0025] Further, as Figures 1 to 6 shown, the guide surfaces of the main guide rail group 5 and the secondary guide rail group 6 in this embodiment both adopt the high-frequency quenching and grinding process, so that the guide surfaces have very high wear resistance and accuracy retention. At the same time, a plastic soft belt for preventing creep with American technology is pasted on the secondary guide rail group 6, which can well ensure the positioning accuracy and repeat positioning accuracy of the movement.

[0026] Further, as Figures 1 to 6 shown, the lathe 1 in this embodiment is provided with a plurality of chip discharge ports 7 below the workpiece and a chip collection box 33 on the outside. A chip conveyor 34 is arranged directly below the chip discharge ports 7 under the lathe 1. The chip conveyor 34 is used to collect the chip slag falling through the chip discharge ports 7 and send the chip slag into the chip collection box 33. At the same time, a lighting device (not shown in the figure) is arranged above the lathe 1. The lighting in the lighting device uses fluorescent lamps so as to clearly observe the cutting and operation conditions of the milling machine.

[0027] Further, as Figures 1 to 6As shown in the figure, in this embodiment, two center rest devices 8 are arranged in parallel along the axial direction of the workpiece on the lathe 1. The two center rest devices 8 are respectively arranged at both ends of the workpiece. The center rest device 8 includes a support assembly 9, a pressing assembly 10, a plurality of adjusting wheel sets 11, and a base 12. The support assembly 9, the pressing assembly 10, and the plurality of adjusting wheel sets 11 are arranged above the base 12. The base 12 is slidably arranged on the main guide rail set 5. The hydraulic system is connected to the base 12 and drives the base 12 to move along the main guide rail set 5 to be applicable to workpieces of different specifications and lengths. Among them, the support assembly 9 is arranged below the workpiece and includes a machine base 13 and two first mounting cylinders 14. The machine base 13 is fixedly connected to the base 12, and the two first mounting cylinders 14 are fixedly arranged on the machine base 13 at intervals around the axis of the workpiece. The pressing assembly 10 includes a first hydraulic driving device 15 hinged to the base 12, a swing arm 16 hinged to the support assembly 9, and a second mounting cylinder 17. The second mounting cylinder 17 is arranged at one end of the swing arm 16 close to the workpiece. The output end of the first hydraulic driving device 15 is hinged to the other end of the swing arm 16 and is used to drive the swing arm 16 to swing. There are three groups of adjusting wheel sets 11. Each group of adjusting assemblies 11 includes a roller 18 and an adjusting member 19. The adjusting members 19 in two of the groups are installed on the first mounting cylinders 14. The rollers 18 in these two groups are rotatably arranged at the upper ends of the adjusting members 19 and are used to form a rolling support for the rotary side surface of the workpiece. The adjusting member 19 in the other group is installed on the second mounting cylinder 17. The roller 18 in this group is rotatably arranged at the lower end of the adjusting member 19 and is used to cooperate with the pressing assembly 10 to realize rolling pressing or loosening of the rotary side surface of the workpiece. The adjusting member 19 in each group is used to adjust the gap between the roller 18 and the axis of the workpiece to adapt to workpieces of different diameters.

[0028] Further, as Figures 1 to 6 shown, a control cabinet (not shown in the figure) is arranged on the side of the lathe 1 in this embodiment. The control system in the control cabinet is respectively connected to the hydraulic system, the cutting device 4, the first hydraulic driving device 15, the second hydraulic driving device 23, the first driving device 25, the second driving device 28, the third driving device 30, and the fourth driving device.

[0029] During specific use: As Figure 1 、 Figure 6 shown, the headstock 2 and the tailstock 3 cooperate to clamp the end of the workpiece. The first hydraulic driving device 15 drives the swing arm 16 to move downward to clamp the rotary side surface of the workpiece. The cutting device 4 performs the cutting process according to the program set in the control system. After cutting is completed, the first hydraulic driving device 15 drives the swing arm 16 to move upward to loosen the rotary side surface of the workpiece, and the tailstock 3 loosens the end of the workpiece, and the workpiece is completed with cutting.

[0030] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A CNC horizontal screw milling machine, comprising a lathe (1), a spindle box (2), a tailstock (3), and a cutting device (4), wherein the spindle box (2) and the tailstock (3) are cooperatively arranged on the lathe (1) and used for clamping and rotating a workpiece, and characterized in that: The lathe (1) is provided with a plurality of center frame devices (8) parallel to the axis direction of the workpiece, and the center frame device (8) comprises a support assembly (9), a clamping assembly (10) and a plurality of adjusting wheel groups (11). The support assembly (9) is arranged below the workpiece and connected to the lathe (1), and the swing end of the clamping assembly (10) is arranged above the workpiece side and is rotatably connected to the support assembly (9). Part of the adjusting wheel groups (11) are arranged on the support assembly (9) and are used to form rolling support for the rotating side surface of the workpiece, and another part of the adjusting wheel groups (11) are arranged on the clamping assembly (10) and are used to cooperate with the clamping assembly (10) to realize rolling clamping or loosening of the rotating side surface of the workpiece.

2. A CNC horizontal screw milling machine according to claim 1, characterized in that: The lathe (1) is provided with a main guide rail group (5) below the workpiece along the axis direction of the workpiece, the center frame device (8) also includes a base (12), the support assembly (9), the clamping assembly (10) and the plurality of adjustment wheel groups (11) are arranged above the base (12), the base (12) is slidably arranged on the main guide rail group (5), and a hydraulic system is provided on the side of the lathe (1), the hydraulic system is used to move the base (12) along the main guide rail group (5).

3. A CNC horizontal screw milling machine according to claim 2, characterized in that: The support assembly (9) comprises a machine base (13) and a plurality of mounting cylinders (14); the machine base (13) is fixedly connected to the base (12); the plurality of mounting cylinders (14) are fixedly arranged on the machine base (13) at intervals around the axis of the workpiece and are used to mount a portion of the adjusting wheel assembly (11).

4. A CNC horizontal screw milling machine according to claim 2, characterized in that: The clamping assembly (10) comprises a hydraulic drive device (15) hinged to the base (12), a swing arm (16) hinged to the support assembly (9), and a plurality of mounting cylinders (17). The plurality of mounting cylinders (17) are arranged at one end of the swing arm (16) close to the workpiece and are used to mount another part of the adjusting wheel assembly (11). The output end of the hydraulic drive device (15) is hinged to the other end of the swing arm (16) and is used to drive the swing arm (16) to swing.

5. A CNC horizontal screw milling machine according to claim 2, 3 or 4, characterized in that: The adjusting wheel assembly (11) comprises a roller (18) and an adjusting member (19); the roller (18) is rotatably disposed at one end of the adjusting member (19) close to the workpiece; the adjusting member (19) is disposed on the supporting assembly (9) or the pressing assembly (10) and is used to adjust the gap between the roller (18) and the axis of the workpiece.

6. A CNC horizontal screw milling machine according to claim 2, characterized in that: The tailstock (3) comprises a tailstock body (20), a sleeve (21), a chuck 1 (22), and a hydraulic drive device 2 (23); the tailstock body (20) is slidably disposed on a main guide rail assembly (5) and is driven by a hydraulic system to move along the main guide rail assembly (5); the sleeve (21) is slidably disposed in the tailstock body (20); the chuck 1 (22) is rotatably disposed at one end of the sleeve (21); the hydraulic drive device 2 (23) is fixedly disposed in the tailstock body (20); an output end of the hydraulic drive device 2 (23) is connected to the other end of the sleeve (21), thereby driving the chuck 1 (22) to press or loosen an end of a workpiece.

7. The CNC horizontal screw milling machine according to claim 1, characterized in that: The spindle box (2) is fixedly mounted on the lathe (1), and comprises a box body (24), a driving device 1 (25), a worm gear assembly (26), and a chuck 2 (27). The driving device 1 (25) is fixedly mounted in the box body (24) and drives the chuck 2 (27) to rotate via the worm gear assembly (26).

8. The CNC horizontal screw milling machine according to claim 1, characterized in that: The lathe (1) is provided with a secondary guide rail group (6) along the axis direction of the workpiece, and the lathe (1) is provided with a second drive device (28) and a workbench (29). The workbench (29) is slidably arranged on the secondary guide rail group (6). The second drive device (28) drives the workbench (29) to move along the secondary guide rail group (6) through a screw rod. The workbench (29) is provided with a slide rail portion (291) along a horizontal axis direction perpendicular to the axis of the workpiece. The workbench (29) is provided with a third drive device (30) and a second workbench (31). The workbench (31) is slidably arranged on the slide rail portion (291). The third drive device (30) drives the workbench (31) to move along the slide rail portion (291) through a screw rod. The cutting device (4) is rotatably arranged on the workbench (31).

9. A CNC horizontal screw milling machine according to claim 8, characterized in that: The cutting device (4) is rotatably connected to the second workbench (31) via a rotating table (32), and a driving device 4 for driving the rotating table (32) to rotate is provided in the second workbench (31).

10. The CNC horizontal screw milling machine according to claim 1, characterized in that: The lathe (1) is provided with a plurality of chip discharge openings (7) below the workpiece and a chip collection box (33) on the outside. A chip conveyor (34) is provided below the lathe (1) directly opposite the chip discharge openings (7). The chip conveyor (34) is used to collect chips dropped through the chip discharge openings (7) and to deliver the chips to the chip collection box (33).

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