Multifunctional tool clamp capable of rapidly positioning and finely adjusting angle
The multi-functional fixture with a circular arc guide and micro-adjustment mechanism addresses low angular resolution and positional inaccuracies in traditional fixtures, enhancing precision and stability for complex part machining.
Patent Information
- Application Number
- CN202510481998.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2025-07-15
AI Technical Summary
Traditional workholding fixtures in precision machining suffer from low angular resolution, positional inaccuracies, and lack of vibration suppression, leading to errors in processing complex curved surfaces, especially in thin-walled components like aircraft engine blades.
A multi-functional fixture with a circular arc guide and adjustable micro-adjustment mechanism, enabling rapid positioning and precise angular adjustment, combined with a micro-adjustment mechanism for enhanced accuracy and stability.
Enhances positioning efficiency, reduces setup time, and ensures high precision and stability during machining, minimizing cumulative errors and improving the quality of complex part processing.
Smart Images
Figure CN120307048A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of special clamping fixtures, and particularly relates to a multi-functional workholding fixture with quick positioning and angle fine-tuning capabilities. Background Art
[0002] In the field of precision machining, traditional workholding fixtures generally adopt a design scheme of a dividing plate positioning structure combined with a mechanical locking device. However, this design scheme has multiple technical bottlenecks in practical applications. Traditional angle adjustment usually relies on discrete indexing hole positions for positioning, which results in a low resolution of angle adjustment, usually greater than 0.5°, and it is easy to cause workpiece offset during the locking process, affecting machining accuracy. Through engineering practice verification, there is a system rigidity coupling phenomenon between the worm and gear fine adjustment mechanism and the main locking device after the existing hydraulic locking fixture completes the angle setting. This makes it necessary to repeatedly loosen and tighten the locking elements during the fine adjustment operation, and thus the cumulative positioning error can reach more than ±0.1 mm. Especially when machining thin-walled workpieces with complex spatial curved surfaces, such as aero-engine blades, the rigid overload design of traditional fixtures is likely to cause workpiece clamping deformation and lack effective vibration suppression function, seriously restricting the machining performance of five-axis linkage machining centers. Therefore, improving the accuracy, rigidity, and stability of the fixture has become the key to promoting technological progress in the field of precision machining. Summary of the Invention
[0003] The purpose of the present invention is to provide a multi-functional workholding fixture with quick positioning and angle fine-tuning capabilities. This multi-functional workholding fixture improves the efficiency, accuracy, and stability of workpiece clamping, can effectively meet the requirements of high-precision and high-efficiency machining at specific clamping angles, and has a wide range of application prospects.
[0004] The multi-functional workholding fixture with quick positioning and angle fine-tuning capabilities includes a base, a positioning plate, an arc guide rail, and a clamping mechanism. A rotating shaft is provided at the left edge of the base, and the left end of the positioning plate is mounted on the rotating shaft through a bushing and can rotate relative to the rotating shaft. An arc guide rail is provided on the right side of the top surface of the base, and the right end of the positioning plate is sleeved on the arc guide rail through a sliding sleeve, and the sliding sleeve can slide relative to the arc guide rail. A positioning screw hole is provided at the top of the sliding sleeve, and the position of the sliding sleeve on the arc guide rail is fixed by screwing in a positioning screw. A clamping mechanism is provided in the middle of the top surface of the positioning plate.
[0005] The arc guide rail is a 1 / 4 arc, and the center of the circle is the axis of the rotating shaft.
[0006] Angle scales are marked on the arc guide rail.
[0007] The clamping mechanism described above includes an upper clamping plate and a lower clamping plate. The middle part of the top surface of the positioning plate is fixedly installed with the lower clamping plate. A plurality of mounting screw holes A are provided on the lower clamping plate, and mounting screw holes B corresponding to the mounting screw holes A are respectively provided on the upper clamping plate and the positioning plate. The upper clamping plate and the lower clamping plate are installed by screwing bolts and nuts at both ends of the bolts to compress the parts between the upper clamping plate and the lower clamping plate.
[0008] Two sets of arc-shaped guide rails are provided at intervals, and the right ends of the top surface of the base are respectively connected to the arc-shaped guide rails through sliding sleeves.
[0009] The multi-functional tooling fixture with quick positioning and adjustable angle also includes a fine-tuning mechanism. The fine-tuning mechanism includes a large turntable, a fine-tuning shaft, a mounting table, and a fine-tuning rod. A fine-tuning shaft sleeve is provided at the right edge of the top surface of the base. The fine-tuning shaft is installed on the fine-tuning shaft sleeve and can rotate relative to the fine-tuning shaft sleeve. The fine-tuning shaft is parallel to the rotating shaft. A large turntable is provided at one end of the fine-tuning shaft, a mounting table is provided in the middle of the fine-tuning shaft, and the lower end of the fine-tuning rod is installed on the mounting table through thread fit. The upper end of the fine-tuning rod extends to the position of the positioning plate and contacts the bottom surface of the positioning plate to form a support.
[0010] The length of the fine-tuning rod is longer than the distance from the axis of the rotating shaft to the axis of the fine-tuning shaft.
[0011] The length design principle of the fine-tuning rod is as follows: when the fine-tuning rod contacts and supports the positioning plate, the angle with the horizontal can be adjusted within the range of 60 - 80°.
[0012] A stop block is provided at the right edge of the bottom surface of the positioning plate to limit the slipping of the fine-tuning rod.
[0013] The beneficial effects of the present invention are as follows: Through the arc-shaped guide rail with angle scales, the present invention can adjust the workpiece to the required position in a short time, greatly improving the operation efficiency, reducing the time required for angle setting in the traditional fixture system, and thus enhancing the production efficiency.
[0014] In the preferred embodiment of the present invention, a fine-tuning mechanism is used. This design makes the angle adjustment more precise, can meet the requirements of high-precision machining, especially in the processing of complex workpieces and precision machining, ensures the stability of the position accuracy, avoids the accumulation of machining errors, and greatly improves the machining quality.
[0015] The tooling fixture of the present invention is simply and reliably designed. This device can not only quickly and stably clamp workpieces of various specifications, but also maintain good repeat positioning accuracy during long-term use, greatly improving the adaptability and stability of workpiece clamping.
[0016] Through optimized design, this invention patent comprehensively improves the efficiency, precision and stability of workpiece clamping, can effectively meet the requirements of high-precision and high-efficiency machining, and has broad application prospects. Description of the Drawings
[0017] Figure 1 It is a schematic structural diagram of a multifunctional fixture for rapid positioning and angle fine-tuning in Embodiment 1; The serial numbers in the figure and the structures and names of each part are as follows: 1 - Base, 2 - Positioning plate, 3 - Arc guide rail, 4 - Rotating shaft, 5 - Sliding sleeve, 6 - Positioning screw, 7 - Upper clamping plate, 8 - Lower clamping plate, 9 - Large turntable, 10 - Fine-tuning shaft, 11 - Installation table, 12 - Fine-tuning rod, 13 - Bolt, 14 - Nut, 15 - Stop block. Detailed Implementation Manner
[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0019] A multifunctional fixture for rapid positioning and angle fine-tuning includes a base 1, a positioning plate 2, an arc guide rail 3, and a clamping mechanism; A rotating shaft 4 is provided at the left edge of the base 1, and the left end of the positioning plate 2 is installed on the rotating shaft 4 through a bushing and can rotate relative to the rotating shaft 4; An arc guide rail 3 is provided on the right side of the top surface of the base 1. The arc guide rail 3 is a 1 / 4 arc, and the center of the circle is the axis of the rotating shaft 4. Angle scales are marked on the arc guide rail 3; Two groups of arc guide rails 3 are provided at intervals, and the right ends of the base 1 are respectively connected to the arc guide rail 3 through sliding sleeves 5; A positioning screw hole is provided at the top of the sliding sleeve 5, and the position of the sliding sleeve 5 on the arc guide rail 3 is fixed by screwing in a positioning screw 6; A clamping mechanism is provided in the middle of the top surface of the positioning plate 2. The clamping mechanism includes an upper clamping plate 7 and a lower clamping plate 8. The lower clamping plate 8 is fixedly installed in the middle of the top surface of the positioning plate 2. A plurality of mounting screw holes A are provided on the lower clamping plate 8, and mounting screw holes B corresponding to the mounting screw holes A are provided on the upper clamping plate 7 and the positioning plate 2 respectively. The upper clamping plate 7 and the lower clamping plate 8 are installed by screwing in bolts 13 and nuts 14 at both ends of the bolts to clamp the parts between the upper clamping plate 7 and the lower clamping plate 8.
[0020] The described multi-functional tooling fixture with quick positioning and fine-tuning angle further includes a fine-tuning mechanism. The fine-tuning mechanism includes a large turntable 9, a fine-tuning shaft 10, a mounting table 11, and a fine-tuning rod 12. A fine-tuning shaft sleeve is provided at the right edge of the top surface of the base 1. The fine-tuning shaft 10 is installed on the fine-tuning shaft sleeve and can rotate relative to the fine-tuning shaft sleeve. The fine-tuning shaft 10 is parallel to the rotating shaft 4. A large turntable 9 is provided at one end of the fine-tuning shaft 10, a mounting table 11 is provided in the middle of the fine-tuning shaft 10, and the lower end of the fine-tuning rod 12 is installed on the mounting table 11 by screw fit. The upper end of the fine-tuning rod 12 extends to the position of the positioning plate 2 and contacts the bottom surface of the positioning plate 2 to form a support. The length of the fine-tuning rod 12 is longer than the distance from the axis of the rotating shaft 4 to the axis of the fine-tuning shaft 10. The length design principle of the fine-tuning rod 12 is as follows: when the fine-tuning rod 12 contacts and supports the positioning plate 2, the angle with the horizontal can be adjusted within the range of 60-80°. A stop block 15 is provided at the right edge of the bottom surface of the positioning plate 2 to limit the slippage of the fine-tuning rod 12.
[0021] The working principle of the present invention is as follows. Based on the rotating shaft 4 and the sliding sleeve 5, the positioning plate 2 slides to the limit on the arc guide rail 3. Rotate the large turntable 9 so that the fine-tuning shaft 10 allows the fine-tuning rod 12 to enter the range of the positioning plate 2. Rotate the positioning plate 2 back to the required angle and tighten the positioning screw 6 on the sliding sleeve 5. Place the workpiece between the upper clamping plate 7 and the lower clamping plate 8 and fasten it with a nut. Loosen the positioning screw 6, rotate the large turntable 9 to fine-tune the position of the fine-tuning rod 12 so that the workpiece reaches the required precise angle position, and then tighten the positioning screw 6 on the sliding sleeve 5 to complete the fastening, thereby realizing the precise machining angle clamping of the workpiece.
[0022] In the description of this embodiment, the orientation or positional relationship terms such as "upper", "lower", "left", "right", "front", "rear", etc. are based on the Figure 1 orientation or positional relationship shown, and are only for the convenience of description and simplifying the operation, 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, so it cannot be understood as a limitation of the present invention.
Claims
1. A multi-functional tooling fixture with quick positioning and angle fine-tuning, comprising a base (1), a positioning plate (2), an arc guide rail (3), and a clamping mechanism, characterized in that: A rotating shaft (4) is provided at the left end edge of the base (1), and the left end of the positioning plate (2) is mounted on the rotating shaft (4) through a bushing and can rotate relative to the rotating shaft (4); An arc guide rail (3) is provided on the right side of the top surface of the base (1), and the right end of the positioning plate (2) is sleeved on the arc guide rail (3) through a sliding sleeve (5), and the sliding sleeve (5) can slide relative to the arc guide rail (3); A positioning screw hole is provided at the top of the sliding sleeve (5), and by screwing in a positioning screw (6), the position of the sliding sleeve (5) on the arc guide rail (3) is fixed; A clamping mechanism is provided in the middle of the top surface of the positioning plate (2).
2. The multi-functional tooling fixture with quick positioning and fine-tuning angle according to claim 1, characterized in that: The arc guide rail (3) is a 1 / 4 arc, and the center of the circle is the axis of the rotating shaft (4).
3. The multi-functional tooling fixture with quick positioning and fine angle adjustment as described in claim 2, wherein: Angle scales are marked on the arc guide rail (3).
4. The multi-functional tooling fixture with quick positioning and angle fine-tuning according to claim 1, characterized in that: The clamping mechanism includes an upper clamping plate (7) and a lower clamping plate (8). The lower clamping plate (8) is fixedly installed in the middle of the top surface of the positioning plate (2). A plurality of mounting screw holes A are provided on the lower clamping plate (8). Mounting screw holes B corresponding to the mounting screw holes A are respectively provided on the upper clamping plate (7) and the positioning plate (2). By screwing in bolts (13) and nuts (14) at both ends of the bolts, the upper clamping plate (7) and the lower clamping plate (8) are installed to clamp the parts between the upper clamping plate (7) and the lower clamping plate (8).
5. The multi-functional workholding fixture with quick positioning and adjustable angle as claimed in claim 1, wherein: Two groups of arc guide rails (3) are provided at intervals, and the right end of the top surface of the base (1) is respectively connected to the arc guide rail (3) through sliding sleeves (5).
6. The multi-functional tooling fixture with quick positioning and fine-tuning angle as described in claim 1, wherein: It further includes a fine-tuning mechanism, and the fine-tuning mechanism includes a large turntable (9), a fine-tuning shaft (10), a mounting table (11), and a fine-tuning rod (12); A fine-tuning bushing is provided at the right side edge of the top surface of the base (1), and the fine-tuning shaft (10) is installed on the fine-tuning bushing and can rotate relative to the fine-tuning bushing. The fine-tuning shaft (10) is parallel to the rotating shaft (4). A large turntable (9) is provided at one end of the fine-tuning shaft (10), a mounting table (11) is provided in the middle of the fine-tuning shaft (10), and the lower end of the fine-tuning rod (12) is installed on the mounting table (11) through thread fit. The upper end of the fine-tuning rod (12) extends to the position of the positioning plate (2) and contacts the bottom surface of the positioning plate (2) to form a support.
7. The multi-functional tooling fixture with quick positioning and fine-tuning angle as claimed in claim 1, characterized in that: The length of the fine-tuning rod (12) is longer than the distance from the axis of the rotating shaft (4) to the axis of the fine-tuning shaft (10).
8. The multifunctional tooling fixture with quick positioning and fine - adjustable angle according to claim 7, characterized in that: The length design principle of the fine-tuning rod (12) is as follows: when the fine-tuning rod (12) contacts and supports the positioning plate (2), the angle with the horizontal can be adjusted within the range of 60 - 80°.
9. The multifunctional tooling fixture with quick positioning and fine - adjustable angle as claimed in claim 7, wherein: A stop block (15) is provided at the right end edge of the bottom surface of the positioning plate (2) to limit the slippage of the fine-tuning rod (12).