Accurate positioning device for column rotation of boring and milling machine

Abstract

The utility model discloses a boring and milling machine's standpost rotation accurate positioning device relates to boring and milling machine technical field, including chassis, the chassis top one side fixedly connected with the cushion block, be provided with the installation bin in the cushion block. This boring and milling machine's standpost rotation accurate positioning device, this device passes through two -stage adjusting mechanism and significantly improved the precision and stability of standpost rotation positioning, and the primary regulation is by the self -locking motor drive adjusting gear rotation, drives the carousel and the worm rotation, realizes the substantial rotation adjustment of support disc through the meshing of worm and worm wheel, and the secondary regulation is by servo motor direct drive worm, utilizes the characteristics of worm gear drive ratio amplification torque, and the fine correction of small angle is carried out to support disc, because worm gear drive has self -locking, and the worm wheel position is locked after adjusting, avoids the rotation deviation caused by load fluctuation or external interference, guarantees the accuracy of positioning, and also has promoted the stability of device in the processing process.

Description

Technical Field

[0001] This utility model relates to the field of boring and milling machine technology, specifically to a column rotation precision positioning device for boring and milling machines. Background Technology

[0002] A boring and milling machine is a multi-functional metal cutting machine tool that combines the precision machining of holes by a boring machine with the machining of planes and curved surfaces by a milling machine.

[0003] Chinese patent (publication number: CN218746116U) discloses a boring and milling machine, relating to the field of boring and milling machine technology. It improves the problem that when machining a workpiece, it is necessary to first use bolts to fix the fixture used to fix the workpiece to the worktable, which is relatively troublesome and has low work efficiency. The machine includes a base, a boring and milling machine frame, a transverse traverse seat, a longitudinal traverse seat, and a worktable. The top of the worktable has two vertically intersecting grooves. A bidirectional screw is rotatably installed inside each of the two grooves. A first motor for driving the bidirectional screw is fixedly installed on the outer wall of the worktable. Two symmetrical fixture fixing plates are threadedly connected to each of the two bidirectional screws. The arrangement of the first motor, bidirectional screw, and clamp fixing plate facilitates clamp fixation without the need for manual bolt removal, simplifying operation and saving manpower. Furthermore, Chinese patent (publication number: CN221474464U) discloses a gantry boring and milling machine, including a bed and a gantry frame. The gantry frame is vertically fixed to the bed, and a boring and milling head is mounted on it. A chip-blocking mechanism is fixedly installed on the boring and milling head, comprising a mounting box, a transmission assembly, and a chip-blocking component. The mounting box is fixedly installed on the boring and milling head, and first through slots are formed on both sides of the mounting box. The transmission assembly is located inside the mounting box, and the chip-blocking component is mounted on the transmission assembly. The transmission assembly drives the chip-blocking component to move horizontally, causing it to pass through the first through slots on both sides of the mounting box. By driving the chip-blocking component to move horizontally and passing through the first through slots on both sides of the mounting box, the chip-blocking component blocks metal chips, reducing the possibility of metal chips flying and injuring operators.

[0004] While existing technologies can overcome the shortcomings mentioned above, other problems still exist in their operation: boring and milling machines achieve machining actions through the vertical movement of the gearbox and the up-and-down displacement of the spindle. However, due to differences in workpiece position, it is often necessary to adjust the rotation angle of the column to adapt to the machining requirements. Currently, the accuracy of the column during rotation is insufficient, making it difficult to meet the requirements for precise positioning. Utility Model Content

[0005] The purpose of this utility model is to provide a column rotation precision positioning device for boring and milling machines, so as to solve the problem in the above-mentioned background technology that due to the difference in workpiece position, it is often necessary to adjust the rotation angle of the column to adapt to the processing requirements, but the current column has insufficient precision during rotation, which makes it difficult to meet the requirements of precise positioning.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a column rotation precision positioning device for a boring and milling machine, including a chassis, a pad block fixedly connected to one side of the top of the chassis, an installation chamber provided inside the pad block, and a rotary structure rotatably connected to the top of the pad block;

[0007] The rotary structure includes a support plate rotatably connected to the top of the pad, a worm gear fixedly connected to the bottom center of the support plate, a turntable rotatably connected to the bottom of the installation chamber, and an adjusting gear fixedly connected to the bottom of the turntable, which is driven by a self-locking motor.

[0008] Preferably, the top side of the installation compartment is provided with an installation groove, and a guide ring is fixedly connected to the bottom of the support plate, the guide ring being slidably connected to the inside of the installation compartment.

[0009] Preferably, the bottom of the support plate is fixedly connected to a ring-shaped array of support pulleys, and the support pulleys are rotatably connected to the inner side of the mounting groove, and the support pulleys support the guide ring.

[0010] Preferably, a plug rod is fixedly connected to the top center of the turntable, and the plug rod is inserted into the bottom center of the worm gear. A worm is rotatably connected to the top of the turntable, and the worm meshes with the outer side of the worm gear. The plug rod is driven by a servo motor.

[0011] Preferably, the top of the guide ring is fixedly connected to two symmetrically distributed columns, and each column is provided with vertical guide rails on both sides. A gearbox is fixedly connected between the two columns, and the two ends of the gearbox are slidably connected to the outside of the vertical guide rails.

[0012] Preferably, the gearbox has two power output ends, and the two output ends are respectively fixedly connected to a first main shaft and a second main shaft. A vertical lead screw is rotatably connected between the two columns, and the vertical lead screw is threaded to the middle of the gearbox and is driven by a motor.

[0013] Preferably, the top of the chassis is provided with a guide rail, and an adjustment seat is slidably connected to the guide rail. The adjustment seat is driven by a lead screw. The top of the adjustment seat is provided with a guide rail, and a shelf is slidably connected to the guide rail. The shelf is driven by a lead screw.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The column rotation precision positioning device of this boring and milling machine significantly improves the accuracy and stability of column rotation positioning through a two-stage adjustment mechanism. The primary adjustment is driven by a self-locking motor to rotate the adjusting gear, which in turn rotates the turntable and worm. The meshing of the worm and worm wheel enables a large-scale rotational adjustment of the support plate. The secondary adjustment is driven directly by a servo motor to drive the worm. Utilizing the torque amplification characteristic of the worm gear transmission ratio, it performs fine correction of the support plate at minute angles. Because the worm gear transmission has self-locking properties, the worm wheel position is locked after adjustment, avoiding rotational deviations caused by load fluctuations or external interference. This ensures both positioning accuracy and improves the stability of the device during machining.

[0016] By integrating two power output ends on the gearbox, which are fixedly connected to the first and second spindles respectively, the convenience and efficiency of tool changing are achieved. When it is necessary to switch machining tools, the drive state of the two spindles can be quickly switched by adjusting the internal transmission path of the gearbox through external control. There is no need to disassemble or adjust the equipment structure. The dual spindle design reduces tool changing time and improves the continuity of multi-process machining. It is especially suitable for complex workpiece machining scenarios that require frequent tool changes, effectively improving the overall machining efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the chassis of this utility model;

[0019] Figure 3 This is a schematic diagram of the installation compartment structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the gearbox structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the support disk structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the worm gear structure of this utility model.

[0023] In the diagram: 1. Chassis; 2. Pad; 3. Mounting chamber; 4. Mounting groove; 5. Support plate; 6. Guide ring; 7. Support pulley; 8. Worm gear; 9. Turntable; 10. Connecting rod; 11. Worm; 12. Adjusting gear; 13. Column; 14. Vertical guide rail; 15. Gearbox; 16. First spindle; 17. Second spindle; 18. Vertical lead screw; 19. Adjusting seat; 20. Display platform. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: Please refer to Figure 1 - Figure 6 This utility model provides the following technical solution: a column rotation precision positioning device for a boring and milling machine, including a chassis 1, a pad 2 fixedly connected to one side of the top of the chassis 1, an installation chamber 3 provided inside the pad 2, and a rotating structure rotatably connected to the top of the pad 2; the rotating structure includes a support plate 5 rotatably connected to the top of the pad 2, a worm gear 8 fixedly connected to the bottom center of the support plate 5, a turntable 9 rotatably connected to the bottom of the installation chamber 3, an adjusting gear 12 fixedly connected to the bottom of the turntable 9, and the adjusting gear 12 being driven by a self-locking motor; an installation groove 4 is provided on the top side of the installation chamber 3, a guide ring 6 is fixedly connected to the bottom of the support plate 5, and the guide ring 6 is slidably connected to the inner side of the installation chamber 3; a ring array of support pulleys 7 is fixedly connected to the bottom of the support plate 5, and the support pulleys 7 are rotatably connected to the inner side of the installation groove 4, and the support pulleys 7 support the guide ring 6; a plug rod 10 is fixedly connected to the top center of the turntable 9, and the plug rod 10 is plugged into the worm gear 8. At the bottom center, a worm gear 11 is rotatably connected to the top of the turntable 9, and the worm gear 11 meshes with the outer side of the worm wheel 8. The plug rod 10 is driven by a servo motor. Two symmetrically distributed columns 13 are fixedly connected to the top of the guide ring 6, and each column 13 has a vertical guide rail 14 on both sides. A gearbox 15 is fixedly connected between the two columns 13, and both ends of the gearbox 15 are slidably connected to the outer side of the vertical guide rail 14. The gearbox 15 has two power output ends, and the two output ends are fixedly connected to the first spindle 16 and the second spindle 17, respectively. A vertical lead screw 18 is rotatably connected between the two columns 13, and the vertical lead screw 18 is threaded to the middle of the gearbox 15. The vertical lead screw 18 is driven by a motor. The top of the chassis 1 has a guide rail, and an adjustment seat 19 is slidably connected to the guide rail. The adjustment seat 19 is driven by a lead screw. The top of the adjustment seat 19 has a guide rail, and a shelf 20 is slidably connected to the guide rail. The shelf 20 is driven by a lead screw.

[0026] The bottom support of the device consists of a chassis 1, which serves as the rigid foundation of the entire device. A pad 2 is fixedly connected to one side of the top. An installation chamber 3 is set inside the pad 2 to provide installation space for the core components of the rotating structure. The top of the pad 2 is rotatably connected to the rotating structure. The support plate 5 is connected to the top of the pad 2 through a bearing or a slewing bearing, allowing it to rotate freely in the horizontal plane.

[0027] The bottom of the support plate 5 is designed with a ring-shaped array of support pulleys 7. These support pulleys 7 are rotatably connected to the mounting groove 4 inside the mounting chamber 3. The mounting groove 4 is a ring groove, which is consistent with the distribution trajectory of the support pulleys 7. This ensures that the support pulleys 7 can evenly distribute the weight of the support plate 5 when rolling, while limiting its rotation to only the horizontal direction to avoid tilting or deviation. The guide ring 6 is fixedly connected to the middle position of the bottom of the support plate 5. Its outer circumference is in sliding contact with the inner wall of the mounting chamber 3, further constraining the rotation trajectory of the support plate 5 and ensuring the accuracy of the rotation center.

[0028] The core transmission components of the rotary structure are the worm gear 8 and the worm 11. The worm gear 8, which is fixed in the middle of the bottom of the support plate 5, has its axis coincide with the rotation center of the support plate 5. The turntable 9, which is rotatably connected to the bottom of the mounting chamber 3, has an adjusting gear 12 fixedly connected to its bottom. The adjusting gear 12 is driven by a self-locking motor.

[0029] When the rotation angle of the column needs to be adjusted, the self-locking motor first drives the adjusting gear 12 to rotate. The adjusting gear 12 drives the turntable 9 to rotate, and the worm 11 rotates around the turntable 9. The worm 11 driven by the servo motor meshes with the outer side of the worm wheel 8. Through the self-locking property of the worm 11 and the worm wheel 8, the support plate 5 is rotated, and the support plate 5 is adjusted initially. The torque of the servo motor is amplified by the transmission ratio of the worm 11 and the worm wheel 8. The worm 11 drives the worm wheel 8 to rotate, achieving a secondary precise adjustment. Because this transmission has a self-locking characteristic, even if the servo motor stops working, the position of the worm wheel 8 can be locked, avoiding rotation deviation caused by load fluctuations or external interference, and ensuring positioning accuracy.

[0030] The rolling of the support pulley 7 in the mounting groove 4 reduces the frictional resistance when the support plate 5 rotates, while the sliding contact between the guide ring 6 and the inner side of the mounting chamber 3 further restricts the radial displacement of the support plate 5 through the constraint force of the contact surface, avoiding swaying caused by uneven load, thereby improving the smoothness of rotation.

[0031] The column 13 is fixedly connected to the top of the guide ring 6 and rotates synchronously with the rotation of the support plate 5, thereby adjusting the machining direction. Vertical guide rails 14 are set on both sides of the column 13. The gearbox 15 is slidably connected to the vertical guide rails 14 through a slider. Its two ends are respectively engaged with the two vertical guide rails 14 to ensure the straightness of the sliding process. The gearbox 15 serves as a power distribution mechanism. It integrates two sets of transmission gears inside, which can convert a single input power into output in two directions. Its two power output ends are fixedly connected to the first spindle 16 and the second spindle 17, respectively, for driving boring and milling cutters or other machining tools. The two spindles facilitate tool replacement.

[0032] The gearbox 15 is threadedly connected to a vertical lead screw 18 in the middle. The vertical lead screw 18 is driven to rotate by an independent motor. When the motor rotates forward or in reverse, the vertical lead screw 18 drives the gearbox 15 to move up and down along the vertical guide rail 14, thereby adjusting the height position of the first spindle 16 and the second spindle 17.

[0033] A horizontal guide rail is provided on the top of the chassis 1. The adjusting seat 19 is slidably connected to the guide rail by a slider. Its bottom is threadedly connected to a horizontal lead screw. The lead screw is driven to rotate by another motor, thereby causing the adjusting seat 19 to move horizontally along the top of the chassis 1. A horizontal guide rail is also provided on the top of the adjusting seat 19. The platform 20 is slidably connected to the guide rail by a slider. Its bottom is threadedly connected to another horizontal lead screw, so as to realize the horizontal movement of the platform 20 on the top of the adjusting seat 19.

[0034] Driven by the two horizontal lead screws, the platform 20 can achieve bidirectional position adjustment of the X and Y axes on the horizontal surface at the top of the chassis 1. Combined with the rotation of the column 13 and the vertical height adjustment, it ultimately forms a three-dimensional positioning capability, meeting the multi-dimensional machining needs of boring and milling machines for complex workpieces.

[0035] When boring and milling is required, the workpiece is first adjusted to the XY plane coordinates of the target machining position by adjusting the horizontal lead screw of the adjusting seat 19 and the table 20; then, the servo motor drives the worm gear 11 to control the rotation angle of the worm wheel 8, so that the column 13 rotates to the target machining direction; then, the vertical lead screw 18 drives the gearbox 15 to move along the vertical guide rail 14 to adjust the height of the first spindle 16 and the second spindle 17.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A column rotation precision positioning device for a boring and milling machine, comprising a chassis (1), wherein a pad (2) is fixedly connected to one side of the top of the chassis (1), wherein an installation chamber (3) is provided inside the pad (2), and a rotary structure is rotatably connected to the top of the pad (2); Its features are: The rotary structure includes a support disk (5) rotatably connected to the top of the pad (2), a worm gear (8) fixedly connected to the bottom center of the support disk (5), a turntable (9) rotatably connected to the bottom of the installation chamber (3), an adjusting gear (12) fixedly connected to the bottom of the turntable (9), and the adjusting gear (12) is driven by a self-locking motor.

2. The column rotation precision positioning device for a boring and milling machine according to claim 1, characterized in that: The top side of the installation chamber (3) is provided with an installation groove (4), and the bottom of the support plate (5) is fixedly connected with a guide ring (6), which is slidably connected to the inside of the installation chamber (3).

3. The column rotation precision positioning device for a boring and milling machine according to claim 2, characterized in that: The bottom of the support plate (5) is fixedly connected to a ring array of support pulleys (7), and the support pulleys (7) are rotatably connected to the inner side of the mounting groove (4), and the support pulleys (7) support the guide ring (6).

4. The column rotation precision positioning device for a boring and milling machine according to claim 3, characterized in that: A plug rod (10) is fixedly connected to the top center of the turntable (9), and the plug rod (10) is inserted into the bottom center of the worm wheel (8). A worm (11) is rotatably connected to the top of the turntable (9), and the worm (11) meshes with the outer side of the worm wheel (8). The plug rod (10) is driven by a servo motor.

5. The column rotation precision positioning device for a boring and milling machine according to claim 4, characterized in that: The top of the guide ring (6) is fixedly connected to two symmetrically distributed columns (13), and each column (13) is provided with vertical guide rails (14) on both sides. A gearbox (15) is fixedly connected between the two columns (13), and the two ends of the gearbox (15) are slidably connected to the outside of the vertical guide rails (14).

6. The column rotation precision positioning device for a boring and milling machine according to claim 5, characterized in that: The gearbox (15) is provided with two power output ends. The two output ends are respectively fixedly connected to the first spindle (16) and the second spindle (17). A vertical screw (18) is rotatably connected between the two columns (13). The vertical screw (18) is threaded to the middle of the gearbox (15) and is driven by a motor.

7. The column rotation precision positioning device for a boring and milling machine according to claim 1, characterized in that: The chassis (1) is provided with a guide rail on the top, and an adjustment seat (19) is slidably connected to the guide rail. The adjustment seat (19) is driven by a lead screw. The adjustment seat (19) is provided with a guide rail on the top, and a shelf (20) is slidably connected to the guide rail. The shelf (20) is driven by a lead screw.

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