Multi-station integrated machining rotary workbench

Abstract

The invention provides a multi-station integrated machining rotary workbench which comprises a main body frame, a plurality of sets of machining rotary mechanisms are installed on the main body frame, and each machining rotary mechanism is used for clamping a part to be machined; the machining rotating mechanism comprises a power assembly, a bridge plate assembly and a tailstock assembly. The power assembly and the tailstock assembly are installed on the main body frame, and the two ends of the bridge plate assembly are installed on the power assembly and the tailstock assembly respectively. The bridge plate assembly is used for clamping a part to be machined. The multi-station integrated machining rotary workbench has the remarkable beneficial effects of improving the machining efficiency, simplifying assembly and maintenance, improving the transmission precision and stability, enhancing the safety and reliability of equipment, optimizing the structure and performance of the equipment and the like; and the requirements of the modern machining field for efficient and high-precision machining equipment can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of processing equipment, and particularly relates to a multi-station integrated processing rotary table. Background Art

[0002] The rotary table is an indispensable equipment in modern manufacturing, especially in the field of precision part processing. Traditional rotary tables are usually used to achieve multi-angle positioning of workpieces and processing tasks with high repeat positioning accuracy requirements. However, with the increasing demand for efficiency, precision, and automation in industrial production, the traditional single-head machine design has gradually revealed some limitations.

[0003] Existing Technologies and Their Deficiencies: 1. Single-station limitation: Most of the rotary tables on the market are designed as single-head machines, that is, only one processing head is equipped on each worktable. This design has low efficiency when multiple identical or similar parts need to be processed simultaneously and cannot meet the needs of high-efficiency batch production.

[0004] 2. Complex assembly and inconvenient maintenance: Traditional rotary tables often consist of many independent components, and these parts need to be assembled and debugged one by one, which not only increases the time cost and technical difficulty of installation but also poses challenges to later maintenance. Once a certain component fails, it may be necessary to disassemble a large number of other components for repair or replacement.

[0005] 3. Problems with power transmission and control accuracy: There are certain limitations in the transmission accuracy between the motor and the reducer, the precise control of the output torque, and the spindle braking force of the existing four-axis turntable. For example, ordinary reducers are difficult to ensure high-precision position control, resulting in affected processing accuracy; and the design of the braking system may not be delicate enough to provide sufficient braking force to ensure stability during the processing.

[0006] 4. Lack of flexibility and adaptability: The worktables on the current market rarely consider the adaptive adjustment ability under different processing requirements. For situations where the workpiece type or size needs to be frequently changed, the existing equipment is difficult to respond quickly and make corresponding adjustments, thus reducing the overall efficiency of the production line.

[0007] Therefore, there are deficiencies in the existing technologies and further improvements are needed. Summary of the Invention

[0008] In view of the problems existing in the prior art, the present invention provides a multi-station integrated processing rotary table.

[0009] To achieve the above object, the specific solutions of the present invention are as follows: The present invention provides a multi-station integrated processing rotary table, including: The main body frame is provided with several groups of processing and rotating mechanisms, and each processing and rotating mechanism is used for clamping a part to be processed; The processing and rotating mechanism includes: a power component, a cross slide component, and a tailstock component; The power component and the tailstock component are installed on the main body frame, and the two ends of the cross slide component are respectively installed on the power component and the tailstock component; The cross slide component is used for clamping the part to be processed.

[0010] Further, the power component includes: a servo motor, a first bushing, a harmonic reducer, a first flange, a first fixing block, a first connecting piece, and a spindle of axis A; The first fixing block is installed on the main body frame, the harmonic reducer is installed on the first fixing block, the servo motor is installed on the outer shell of the harmonic reducer through the first flange, the output shaft of the servo motor is connected to the input shaft of the harmonic reducer through the first bushing, and the output shaft of the harmonic reducer is connected to the spindle of axis A through the first connecting piece; One end of the cross slide component is installed on the spindle of axis A and the other end is installed on the tailstock component.

[0011] Further, the rotary table further includes a brake component; The brake component includes: a first braking part and a second braking part; The first braking part is installed on the spindle of axis A and rotates together with the spindle of axis A, and the second braking part is installed on the first fixing block; The second braking part brakes the spindle of axis A by friction with the first braking part.

[0012] Further, the rotary table further includes a water and gas path component; The second braking part of the brake component is provided with an OPEN hole and an OFF hole; The water and gas path component is respectively connected to the OPEN hole and the OFF hole; When the OPEN hole is ventilated, the brake component is in an open state, and the second braking part is away from the first braking part; When the OFF hole is ventilated, the brake component is in a closed state, and the second braking part approaches the first braking part for braking.

[0013] Further, the rotary table further includes a motor cover component, which is installed on the main body frame, and the servo motor is installed in the motor cover component.

[0014] Further, the rotary table is provided with four independent processing and rotating mechanisms, which are arranged in parallel on the main body frame.

[0015] Further, the main body frame is concave.

[0016] Further, the contact surface between the first braking part and the second braking part is a tapered mating structure with a taper angle of 15° ± 0.5°, and three groups of adjusting screws (M8 × 1.25) and locking nuts are evenly distributed in the circumferential direction of the second braking part; The front end of the adjusting screw is provided with a tapered top block made of bronze (taper angle 15° ± 0.5°), and the concentricity between the first braking part and the second braking part can be compensated for micron-level gaps by rotating the adjusting screw.

[0017] Further, the tailstock assembly includes an elastic preloading device, which consists of two groups of symmetrically arranged disc spring groups (diameter 50 mm, preloading force 3000 N ± 5%) and a hydraulic compensation cylinder. The hydraulic compensation cylinder is connected to the main body frame through a precision ball guide (straightness 0.005 mm / m). The pressure ratio between the disc spring group and the hydraulic compensation cylinder is set to 3:1, which can realize the adaptive position adjustment during the installation of the bridge plate assembly.

[0018] Further, the wave generator of the harmonic reducer adopts a double-row crossed roller bearing structure, and a preloading force adjustment mechanism is provided at the input end of the harmonic reducer. This mechanism includes four groups of M6 adjusting bolts and locking nuts distributed at 90°. The front end of the adjusting bolt abuts against a wedge-shaped block made of tungsten carbide (wedge angle 7°), and the meshing clearance of the harmonic reducer can be adjusted with an accuracy of 0.001 mm by rotating the adjusting bolt.

[0019] Adopting the technical solution of the present invention has the following beneficial effects: 1. Improve processing efficiency: The multi-station integrated processing rotary table adopts a multi-station design, and multiple parts can be processed simultaneously with one clamping, significantly improving the processing efficiency. Compared with traditional single-head machines, the processing cycle can be greatly shortened.

[0020] 2. Simplify assembly and maintenance: The workbench consists of a main body frame, a power component, a bridge plate component, a tailstock component, etc. Each component can be assembled independently without interference, facilitating assembly debugging and later maintenance, and shortening the product assembly cycle.

[0021] The tailstock assembly includes an elastic preloading device, which can realize the adaptive position adjustment during the installation of the bridge plate assembly, simplifies the installation process, and reduces the maintenance cost.

[0022] 3. Improve transmission accuracy and stability: The power component uses a servo motor to drive the harmonic reducer. The wave generator of the harmonic reducer adopts a double-row crossed roller bearing structure, and a preloading force adjustment mechanism is provided at the input end, which can perform high-precision adjustment of the meshing clearance to ensure the transmission accuracy and stability.

[0023] The contact surface of the brake assembly has a tapered mating structure. By adjusting the screw and the tapered top block made of bronze, micron-level clearance compensation can be performed on the concentricity of the brake components, further improving the stability and reliability of braking.

[0024] 4. Enhance the safety and reliability of the equipment: The brake assembly realizes pneumatic control through the water and gas path assembly. By switching the ventilation states of the OPEN hole and the OFF hole, the opening and closing of the brake are achieved. The control method is simple and reliable, improving the safety of the equipment.

[0025] 5. Optimize the structure and performance of the equipment: The main frame is designed in a concave shape, which can better meet the requirements of multi-station processing, improving the overall stability and space utilization rate of the equipment.

[0026] The design of the motor cover assembly not only protects the servo motor but also optimizes the overall appearance of the equipment, improving the protection performance of the equipment. Description of the Drawings

[0027] Figure 1 is a perspective view of the present invention from a top-down angle; Figure 2 is another perspective view of the present invention from a top-down angle; Figure 3 is a cross-sectional view of the present invention; Figure 4 is a perspective view of the power assembly of the present invention; Figure 5 is a perspective view of the power assembly of the present invention from another perspective; Figure 6 is a side view of the power assembly of the present invention.

[0028] In the figure: 1, main frame; 2, power assembly; 3, bridge plate assembly; 4, tailstock assembly; 5, servo motor; 6, first bushing; 7, harmonic reducer; 8, first flange; 9, first fixing block; 10, first connecting piece; 11, A-axis spindle; 12, brake assembly; 13, water and gas path assembly; 14, motor cover assembly. Detailed Embodiments

[0029] The following further describes the present invention in detail with reference to the drawings and embodiments; it can be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention; in addition, it should be noted that only parts related to the present invention are shown in the drawings for the convenience of description, rather than all of them.

[0030] Combined with Figures 1-6 As shown, the present invention provides a multi-station integrated processing rotary table, including: The main body frame 1 is provided with a plurality of groups of processing and rotating mechanisms, and each processing and rotating mechanism is used for clamping a part to be processed; The processing and rotating mechanism includes: a power assembly 2, a cross slide assembly 3, and a tailstock assembly 4; The power assembly 2 and the tailstock assembly 4 are installed on the main body frame 1, and both ends of the cross slide assembly 3 are respectively installed on the power assembly 2 and the tailstock assembly 4; The cross slide assembly 3 is used for clamping the part to be processed.

[0031] The power assembly 2 includes: a servo motor 5, a first bushing 6, a harmonic reducer 7, a first flange 8, a first fixing block 9, a first connecting member 10, and an A-axis main shaft 11; The first fixing block 9 is installed on the main body frame 1, the harmonic reducer 7 is installed on the first fixing block 9, the servo motor 5 is installed on the housing of the harmonic reducer 7 through the first flange 8, the output shaft of the servo motor 5 is connected to the input shaft of the harmonic reducer 7 through the first bushing 6, and the output shaft of the harmonic reducer 7 is connected to the A-axis main shaft 11 through the first connecting member 10; One end of the cross slide assembly 3 is installed on the A-axis main shaft 11 and the other end is installed on the tailstock assembly 4.

[0032] The rotary table further includes a brake assembly 12; The brake assembly 12 includes: a first braking part and a second braking part; The first braking part is installed on the A-axis main shaft 11 and rotates together with the A-axis main shaft 11, and the second braking part is installed on the first fixing block 9; The second braking part brakes the A-axis main shaft 11 by frictional contact with the first braking part.

[0033] The rotary table further includes a water and gas path assembly 13; The second braking part of the brake assembly 12 is provided with an OPEN hole and an OFF hole; The water and gas path assembly 13 is respectively connected to the OPEN hole and the OFF hole; When the OPEN hole is ventilated, the brake assembly 12 is in an open state, and the second braking part is away from the first braking part; When the OFF hole is ventilated, the brake assembly 12 is in a closed state, and the second braking part approaches the first braking part for braking.

[0034] The rotary table further includes a motor cover assembly 14, which is installed on the main body frame 1, and the servo motor 5 is installed in the motor cover assembly 14.

[0035] The rotary table is provided with four independent processing and rotating mechanisms, which are arranged in parallel on the main body frame 1.

[0036] The main body frame 1 is concave-shaped.

[0037] The contact surface between the first braking part and the second braking part has a tapered mating structure with a taper angle of 15° ± 0.5°, and three groups of adjusting screws (M8×1.25) and locking nuts are evenly distributed in the circumferential direction of the second braking part. The front end of the adjusting screw is provided with a tapered top block made of bronze (taper angle 15° ± 0.5°). By rotating the adjusting screw, micron-level clearance compensation can be performed on the concentricity between the first braking part and the second braking part.

[0038] The tailstock assembly 4 includes an elastic preloading device, which consists of two groups of symmetrically arranged disc spring groups (diameter 50mm, preloading force 3000N ± 5%) and a hydraulic compensation cylinder. The hydraulic compensation cylinder is connected to the main body frame 1 through a precision ball guide (straightness 0.005mm / m). The pressure ratio between the disc spring group and the hydraulic compensation cylinder is set to 3:1, enabling adaptive position adjustment during the installation of the bridge plate assembly 3.

[0039] The wave generator of the harmonic reducer 7 adopts a double-row crossed roller bearing structure, and a preloading force adjustment mechanism is provided at the input end of the harmonic reducer 7. This mechanism includes four groups of M6 adjusting bolts and locking nuts distributed at 90°. The front end of the adjusting bolt abuts against a wedge-shaped block made of tungsten carbide (wedge angle 7°). By rotating the adjusting bolt, the meshing clearance of the harmonic reducer 7 can be adjusted with an accuracy of 0.001mm.

[0040] The bridge plate assembly 3 is provided with a quick-change interface, which includes three carbide positioning pins (diameter 12h5) distributed at 120° and two groups of hydraulically driven quick-release bolts (M16×2). The mating surface between the positioning pin and the quick-release bolt is coated with a nanoscale diamond-like coating (thickness 3μm, hardness HV3000). The mating clearance between the positioning pin and the mounting hole is controlled within the range of 0.002 - 0.005mm.

[0041] The working principle of the present invention is as follows: A multi-station integrated machining rotary table proposed by the present invention has its working principle mainly centered around aspects such as power transmission, precise control, and efficient clamping. The following is the detailed working principle: Power Transmission and Control Driven by a servo motor 5: The core power of this worktable comes from the servo motor 5. The servo motor 5 is connected to the input shaft of the harmonic reducer 7 through a first shaft sleeve 6, and the harmonic reducer 7 is installed in a first fixed block 9 fixed to the main body frame 1.

[0042] High-precision transmission: The harmonic reducer 7 is responsible for converting the high-speed and low-torque output of the servo motor 5 into a low-speed and high-torque output suitable for processing requirements, and transmitting the power to the A-axis spindle 11 through the first connecting piece 10. The harmonic reducer 7 adopts a double-row crossed roller bearing structure and is equipped with a pre-tightening force adjustment mechanism, ensuring a meshing clearance adjustment accuracy of 0.001 mm level.

[0043] Brake control: The A-axis spindle 11 is equipped with a brake assembly 12, including a first brake part and a second brake part. The first brake part rotates together with the A-axis spindle 11, while the second brake part is fixed on the first fixing block 9. When it is necessary to stop or hold the position, the water and gas path assembly 13 controls the brake state by ventilating the OPEN hole or OFF hole of the brake assembly 12. Specifically: When the OPEN hole is ventilated, the second brake part moves away from the first brake part, and the brake is in the open state; When the OFF hole is ventilated, the second brake part approaches the first brake part and applies a braking force to stop the rotation of the A-axis spindle 11.

[0044] Precise clamping and positioning Clamping of the bridge plate assembly 3: One end of the bridge plate assembly 3 is installed on the A-axis spindle 11, and the other end is installed on the tailstock assembly 4, which is used to firmly clamp the parts to be processed. The bridge plate assembly 3 is designed with a quick-change interface, including three carbide positioning pins (diameter 12h5) distributed at 120° and two groups of hydraulically driven quick-release bolts (M16×2), making the loading and unloading more convenient and accurate.

[0045] Adaptive adjustment: The tailstock assembly 4 is equipped with an elastic pre-tightening device, which consists of a disc spring group and a hydraulic compensation cylinder, and can automatically adjust the position of the bridge plate assembly 3 according to the actual processing conditions to ensure the stability and consistency during the processing. This design is especially suitable for application scenarios that require high-precision positioning.

[0046] Multi-station parallel processing The rotary table is provided with four independent processing rotary mechanisms, which are arranged in parallel on the main body frame 1. Each mechanism can operate independently to realize the simultaneous processing of multiple parts, significantly improving the production efficiency.

[0047] Summary Overall, the present invention realizes the ability of simultaneous multi-station processing through an integrated power system, precise control mechanism, and efficient clamping scheme. Its unique brake control system, quick-change interface design, and adaptive adjustment function not only improve the operation flexibility and processing accuracy of the equipment, but also greatly reduce the downtime and enhance the overall efficiency of the production line. These characteristics make it very suitable for industrial fields that require high precision and large-scale production, such as 3C product manufacturing, automotive parts processing, and aerospace, etc.

[0048] Example 1 (Infrastructure Implementation and Precision Verification) Structure Assembly and Debugging 1. Construction of the main body frame 1: The concave main body frame 1 (size 1200×800×300 mm, wall thickness 25±0.5 mm) is cast from HT300 cast iron, and four groups of processing rotary mechanisms are distributed in a rectangular array with a spacing tolerance of ±0.02 mm; Precision ball guide rails (model: THK HSR35) are embedded in the grooves, and the straightness is calibrated to 0.005 mm / m.

[0049] 2. Assembly of the power component 2: The servo motor 5 (Yaskawa Σ-7-45N·m) is connected to the harmonic reducer 7 (CSF-25-100, reduction ratio 1:100) through the first flange 8 (made of 40Cr, thickness 30 mm), and the assembly clearance between the input shaft and the motor shaft sleeve (H7 / k6 fit) is 0.005 mm; The A-axis main shaft 11 (diameter 80h6, material 42CrMo) is connected to the output end of the harmonic reducer 7 through the first connecting piece 10 (GCr15 bearing steel), and the coaxiality detected by the dial indicator is ≤0.003 mm.

[0050] 3. Debugging of the brake assembly 12: The second brake part (cone angle 15°±0.5°, material 20CrMnTi) is installed on the first fixing block 9, and the pre-tightening torque of the three groups of M8×1.25 adjustment screws is 50 N·m; Compressed air of 0.6 MPa is introduced into the OPEN hole. After the brake gap is expanded to 0.1 mm, manually rotate the A-axis main shaft 11 for 2 weeks and lock the adjustment screws; Air is introduced into the OFF hole to trigger the brake to close, and the laser interferometer detects the repeat positioning accuracy of ±0.0015 mm.

[0051] Processing Verification: Test object: Machine 4 aluminum alloy (6061-T6) flange plates with a diameter of φ100 mm and a thickness of 20 mm; Processing parameters: Spindle speed 10 rpm, cutting force 800 N; Precision results: The flatness error of four-station synchronous machining is ≤0.004 mm (coordinate measuring machine: ZEISS Prismo 7); The surface roughness Ra = 0.38 μm (roughness meter: Mitutoyo SJ-410); Efficiency comparison: The single-piece machining time is shortened from 45 minutes of the traditional single-head machine to 12 minutes, and the efficiency is increased by 275%.

[0052] Example 2 (Extreme Working Conditions and Quick Tooling Change Test) Verification of High Load Operation: 1. Continuous Machining Test: Continuously machine cast iron parts (HT250) for 48 hours, with a single-piece weight of 5 kg and a cutting force of 1200 N; Thermal Deformation Monitoring: The infrared thermal imager (FLIR T840) shows that the temperature rise of the harmonic reducer 7 ≤ 32 °C (ambient temperature 25 °C), and the radial runout of the spindle ≤ 0.003 mm; Wear Data: After 50,000 starts and stops of the brake assembly 12, the wear amount of the conical surface is 0.003 mm (white light interferometer: Zygo NewView 9000).

[0053] 2. Quick Tooling Change Operation: Bridge Plate Assembly Replacement Process: The hydraulic station (pressure 20 MPa) drives the quick-release bolt (M16×2) to unlock within 3 seconds; The cemented carbide locating pin (diameter 12h5) is pulled out with a resistance of 45 N (dynamometer: IMADA ZTS-50N); After the new bridge plate assembly is accurately positioned through the locating pin (fit clearance 0.003 mm), the hydraulic bolt is automatically locked (pre-tightening force 8000 N); Accuracy Verification: The coaxiality error of the bridge plate assembly after repeated installation ≤ 0.0025 mm; The total tooling change time is 4 minutes and 30 seconds, and the efficiency is increased by 85% compared with the traditional disassembly and assembly method (30 minutes).

[0054] Extreme Environment Test: Vibration Condition: Continuously operate for 8 hours under random vibration (amplitude 0.15 g) from 5 - 200 Hz; Performance: The fluctuation of the meshing clearance of the harmonic reducer 7 ≤ 0.0005 mm (capacitive displacement sensor: Lion Precision CPL290); The surface roughness Ra of the machined surface ≤ 0.42 μm, meeting the NAS 7-level standard for aviation parts.

[0055] The above are only the preferred embodiments of the present invention, and do not limit the scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention, or direct / indirect application in other related technical fields, is included in the protection scope of the present invention.

Claims

1. A multi-station integrated processing rotary worktable, characterized in that Comprising: A main body frame, on which several groups of processing and rotating mechanisms are installed, and each processing and rotating mechanism is used for clamping a part to be processed; The processing and rotating mechanism includes: a power component, a cross slide component, and a tailstock component; The power component and the tailstock component are installed on the main body frame, and both ends of the cross slide component are respectively installed on the power component and the tailstock component; The cross slide component is used for clamping the part to be processed.

2. The multi-station integrated processing and rotating workbench according to claim 1, characterized in that The power component includes: a servo motor, a first bushing, a harmonic reducer, a first flange, a first fixing block, a first connecting piece, and an A-axis main shaft; The first fixing block is installed on the main body frame, the harmonic reducer is installed on the first fixing block, the servo motor is installed on the shell of the harmonic reducer through the first flange, the output shaft of the servo motor is connected to the input shaft of the harmonic reducer through the first bushing, and the output shaft of the harmonic reducer is connected to the A-axis main shaft through the first connecting piece; One end of the cross slide component is installed on the A-axis main shaft and the other end is installed on the tailstock component.

3. The multi-station integrated processing and rotating workbench according to claim 2, characterized in that It further includes a braking component; The braking component includes: a first braking part and a second braking part; The first braking part is installed on the A-axis main shaft and rotates together with the A-axis main shaft, and the second braking part is installed on the first fixing block; The second braking part brakes the A-axis main shaft by friction with the first braking part.

4. The multi-station integrated processing and rotating workbench according to claim 3, characterized in that It further includes a water and gas path component; The second braking part of the braking component is provided with an OPEN hole and an OFF hole; The water and gas path component is respectively connected to the OPEN hole and the OFF hole; When the OPEN hole is ventilated, the braking component is in an open state, and the second braking part is away from the first braking part; When the OFF hole is ventilated, the braking component is in a closed state, and the second braking part approaches the first braking part for braking.

5. The multi-station integrated processing and rotating workbench according to claim 2, characterized in that It further includes a motor cover component, which is installed on the main body frame, and the servo motor is installed in the motor cover component.

6. The multi-station integrated processing and rotating workbench according to claim 1, characterized in that The rotating workbench is provided with four independent processing and rotating mechanisms, which are arranged in parallel on the main body frame.

7. The multi-station integrated processing and rotating workbench according to claim 1, characterized in that The main body frame is concave.

8. The multi-station integrated processing and rotating workbench according to claim 3, characterized in that The contact surface between the first braking part and the second braking part is in a conical mating structure, the cone angle is 15°±0.5°, and three groups of adjusting screws and locking nuts are evenly distributed in the circumferential direction of the second braking part. The front end of the adjusting screw is provided with a conical top block made of bronze material, and the concentricity between the first braking part and the second braking part can be compensated with a micron-level gap by rotating the adjusting screw.

9. The multi-station integrated processing and rotating workbench according to claim 1, characterized in that The tailstock assembly includes an elastic preloading device, which consists of two groups of symmetrically arranged disc spring groups and a hydraulic compensation cylinder. The disc spring groups have a diameter of 50 mm and a preloading force of 3000 N ± 5%. The hydraulic compensation cylinder is connected to the main body frame through precision ball rails. The pressure ratio between the disc spring groups and the hydraulic compensation cylinder is set to 3:1, enabling adaptive position adjustment during the installation of the bridge plate assembly.

10. The multi-station integrated machining rotary table according to claim 2, wherein The wave generator of the harmonic reducer adopts a double-row crossed roller bearing structure, and a preloading force adjustment mechanism is provided at the input end of the harmonic reducer. This mechanism includes four groups of M6 adjusting bolts and locking nuts distributed at 90°. The front end of the adjusting bolt abuts against a tungsten carbide wedge block with a wedge angle of 7°. By rotating the adjusting bolt, the meshing clearance of the harmonic reducer can be adjusted with an accuracy of 0.001 mm.

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