Two-fixed six-movable eight-point automatic alignment rapid positioning tool for arc-shaped workpiece

Abstract

The invention discloses an arc-shaped workpiece two-fixed six-movable eight-point automatic alignment rapid positioning tool, and relates to the technical field of machining positioning, the arc-shaped workpiece two-fixed six-movable eight-point automatic alignment rapid positioning tool comprises a positioning table, an arc-shaped receding groove is formed in the positioning table, and two positioning wheels are symmetrically arranged on the two sides of the middle of the arc-shaped receding groove; two horizontal adjusting rods which synchronously ascend and descend are arranged at the two ends of the groove bottom of the arc-shaped receding groove, diagonal adjusting rods are arranged at the four corners of the arc-shaped receding groove, and each pair of diagonal adjusting rods which are arranged diagonally ascend and descend synchronously; and a pressing mechanism for applying pressure to the blank workpiece is arranged right above the positioning table. The two-fixed six-movable eight-point automatic alignment rapid positioning tool for the arc-shaped workpiece is simple and feasible in structure and high in positioning efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of machining positioning, and particularly to a two-fixed six-moving eight-point automatic alignment and rapid positioning tooling for arc-shaped workpieces. Background Art

[0002] In the field of machining, arc-shaped blank workpieces are usually formed by casting or forging processes. Affected by factors such as the release of material residual stress, thermal processing deformation, and uneven distribution of machining allowances, there are generally deviations between the actual arc of the blank parts and the theoretical design values. In addition, in arc-shaped blank workpieces, local warping deformation is likely to occur due to stress concentration in the corner areas, resulting in difficulties for traditional positioning devices to effectively position them.

[0003] To address the above problems, the current industry generally uses rigid fixtures for positioning and applies multi-point forced constraints to the workpiece through multiple hydraulic cylinders or pneumatic cylinders. Although this method can achieve the correction and positioning of the workpiece to a certain extent, it has problems such as low positioning efficiency and complex structure.

[0004] Therefore, it is necessary to propose a two-fixed six-moving eight-point automatic alignment and rapid positioning tooling for arc-shaped workpieces to solve the above problems. Summary of the Invention

[0005] (1) Technical Problems to be Solved The purpose of the present invention is to provide a two-fixed six-moving eight-point automatic alignment and rapid positioning tooling for arc-shaped workpieces to solve the problems raised in the above background art.

[0006] (2) Technical Solutions To achieve the above object, the present invention is realized through the following technical solutions: A two-fixed six-moving eight-point automatic alignment and rapid positioning tooling for arc-shaped workpieces, including a positioning table. An arc-shaped relief groove is provided on the positioning table. Two positioning wheels are symmetrically arranged on both sides of the middle of the arc-shaped relief groove. Two horizontally adjustable rods that move synchronously are provided at both ends of the bottom of the arc-shaped relief groove. Diagonal adjustment rods are provided at the four corners of the arc-shaped relief groove, and the two diagonal adjustment rods arranged diagonally are lifted and lowered synchronously; A pressing mechanism for pressing the blank workpiece is provided directly above the positioning table.

[0007] Preferably, the axis of the positioning wheel is parallel to the length direction of the arc-shaped relief groove.

[0008] Preferably, one end of each of the diagonal adjustment rod and the horizontal adjustment rod is slidably connected to the positioning table, and the other end of each of the diagonal adjustment rod and the horizontal adjustment rod is slidably connected to a limit frame. The positioning table and the limit frame are fixedly connected by a middle frame.

[0009] Preferably, the two horizontal adjustment rods are fixedly connected via a second connecting plate, and the two diagonal adjustment rods arranged diagonally are fixedly connected via a first connecting plate.

[0010] Preferably, the clamping mechanism includes a pressing plate driven to rise and fall by a cylinder.

[0011] Preferably, the size of the pressing plate is smaller than the size of the arc-shaped giving way groove, and pressing wheels are rotatably connected to the four corners of the pressing plate.

[0012] Preferably, a clamping mechanism is provided on the outer side of the positioning platform along the length direction of the arc-shaped clearance groove, and the clamping mechanism acts on the axial ends of the blank workpiece to clamp and fix it.

[0013] Preferably, the length of the blank workpiece is greater than the length of the positioning platform.

[0014] (III) Beneficial effects Compared with the prior art, the present invention provides a two-fixed and six-moved eight-point automatic alignment and rapid positioning tool for arc-shaped workpieces, which has the following beneficial effects: 1. The two-fixed and six-moving eight-point automatic alignment and rapid positioning tooling for arc-shaped workpieces can correct and position the curvature and end angle of the rough workpiece by setting positioning wheels, diagonal adjustment rods and horizontal adjustment rods to meet the needs of subsequent processing. The structure is simple and easy to operate, and the positioning efficiency is high.

[0015] 2. The arc-shaped workpiece two-fixed six-moving eight-point automatic alignment rapid positioning tooling is equipped with two horizontal adjustment rods and two sets of diagonal adjustment rods that are lifted and lowered synchronously, and the two ends of the diagonal adjustment rods and the horizontal adjustment rods are limited by the positioning table and the limit frame respectively, so as to avoid position deviation during the lifting process and ensure the correction and positioning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional schematic diagram of a positioning platform of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention; Figure 3 It is a schematic diagram of a front cross-section of the structure of the present invention; Figure 4 It is a side view schematic diagram of the structure of the present invention.

[0017] In the figure: 1. positioning wheel; 2. diagonal adjustment rod; 3. horizontal adjustment rod; 4. arc-shaped clearance groove; 5. positioning table; 6. middle frame; 7. limit frame; 8. rough workpiece; 9. first connecting plate; 10. second connecting plate; 13. clamping mechanism; 14. clamping mechanism; 15. pressing wheel; 16. pressing plate. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] See also Figures 1-4 As shown, it includes a positioning platform 5, on which an arc-shaped clearance groove 4 is opened, two positioning wheels 1 are symmetrically arranged on both sides of the middle of the arc-shaped clearance groove 4, two horizontal adjustment rods 3 that are synchronously lifted and lowered are arranged at both ends of the bottom of the arc-shaped clearance groove 4, and diagonal adjustment rods 2 are arranged at the four corners of the arc-shaped clearance groove 4, and each pair of two diagonal adjustment rods 2 that are arranged diagonally are lifted and lowered synchronously; a clamping mechanism 13 for applying pressure to the rough workpiece 8 is arranged directly above the positioning platform 5. Specifically, the diagonal adjustment rods 2 and the horizontal adjustment rods 3 are driven to lift and lower by independent cylinders, and the curvature of the arc-shaped clearance groove 4 is adapted to the outer curved surface of the standard workpiece.

[0020] When positioning the rough workpiece 8, it is placed on the positioning platform 5, and the rough workpiece 8 is pressed by the clamping mechanism 13, and the two positioning wheels 1 contact the outer arc surface of the rough workpiece 8 to support and position it; then the two horizontal adjustment rods 3 are driven upward synchronously by the cylinder, and the two horizontal adjustment rods 3 respectively support and position the two ends of the rough workpiece 8 to make it horizontal, and at the same time, with the cooperation of the positioning wheel 1, its curvature is corrected and positioned; finally, the two diagonal adjustment rods 2 set diagonally are driven upward synchronously by the cylinder, and the end angles of the rough workpiece 8 are supported and positioned by the diagonal adjustment rods 2, and the warped end angles are corrected. By making the two diagonal adjustment rods 2 move upward synchronously, the problem of diagonal offset when the diagonal adjustment rod 2 corrects one of the angles is avoided.

[0021] Specifically, the axis of the positioning wheel 1 is parallel to the length direction of the arc-shaped clearance groove 4. Through the above arrangement, during the positioning process, the positioning wheel 1 can roll relative to the blank workpiece 8 to reduce the friction between the positioning wheel 1 and the outer arc surface of the blank workpiece 8.

[0022] In some embodiments, in order to improve the stability of the diagonal adjustment rod 2 and the horizontal adjustment rod 3, one end of the diagonal adjustment rod 2 and the horizontal adjustment rod 3 are slidably connected to the positioning platform 5, and the other end of the diagonal adjustment rod 2 and the horizontal adjustment rod 3 are slidably connected to the limit frame 7, and the positioning platform 5 and the limit frame 7 are fixedly connected through the middle frame 6.

[0023] The two ends of the horizontal adjustment rod 3 are further limited by the positioning platform 5 and the limiting frame 7 to avoid position deviation during the lifting process and ensure the correction effect.

[0024] In some embodiments, in order to enable the two horizontal adjustment rods 3 to be accurately and synchronously lifted and lowered to ensure the horizontal positioning effect of the blank workpiece 8, the two horizontal adjustment rods 3 are fixedly connected by a second connecting plate 10; in order to ensure the synchronous lifting and lowering of the two diagonal adjustment rods 2, the two diagonally arranged diagonal adjustment rods 2 are fixedly connected by a first connecting plate 9.

[0025] In some embodiments, the clamping mechanism 13 includes a pressing plate 16 driven by a cylinder to rise and fall. Preferably, the size of the pressing plate 16 is smaller than the size of the arc-shaped clearance groove 4, and the four corners of the pressing plate 16 are rotatably connected with pressing wheels 15. When the blank workpiece 8 is corrected and positioned, the deformation of the blank workpiece 8 will cause a small displacement of its force point. By using the pressing wheel 15 to apply pressure to the blank workpiece 8, when the force point is displaced, the pressing wheel 15 can roll relative to the inner arc surface of the blank workpiece 8 to reduce friction and ensure that the blank workpiece 8 is evenly stressed.

[0026] In some embodiments, a clamping mechanism 14 is provided on the outer side of the positioning platform 5 along the length direction of the arc-shaped clearance groove 4, and the clamping mechanism 14 acts on the axial ends of the blank workpiece 8 to clamp and fix it. The axial ends of the blank workpiece 8 are clamped and fixed by the clamping mechanism 14 to avoid axial deviation during the processing. Specifically, the length of the blank workpiece 8 is greater than the length of the positioning platform 5. This prevents the positioning platform 5 from interfering with the clamping mechanism 14 on the blank workpiece 8.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An eight-point automatic alignment and rapid positioning tooling for two-fixed and six-moving of an arc-shaped workpiece, characterized in that: It includes a positioning table (5), on which an arc-shaped relief groove (4) is provided. On both sides of the middle of the arc-shaped relief groove (4), two positioning wheels (1) are symmetrically arranged. At both ends of the bottom of the arc-shaped relief groove (4), two horizontally adjusting rods (3) that are synchronously lifted and lowered are provided. At the four corners of the arc-shaped relief groove (4), diagonal adjusting rods (2) are provided, and the two diagonal adjusting rods (2) arranged diagonally are synchronously lifted and lowered; directly above the positioning table (5), there is a pressing mechanism (13) for pressing the blank workpiece (8).

2. The automatic alignment and rapid positioning tooling for two fixed and six moving points of an arc-shaped workpiece according to claim 1, characterized in that: The axis of the positioning wheel (1) is parallel to the length direction of the arc-shaped relief groove (4).

3. The automatic centering and rapid positioning tooling for two fixed and six moving points of an arc workpiece according to claim 1, characterized in that: One end of each of the diagonal adjusting rod (2) and the horizontal adjusting rod (3) is slidably connected to the positioning table (5), and the other end of the diagonal adjusting rod (2) and the horizontal adjusting rod (3) is slidably connected to the limiting frame (7). The positioning table (5) and the limiting frame (7) are fixedly connected through a middle frame (6).

4. An automatic centering and rapid positioning tooling for two fixed and six moving points of an arc workpiece according to claim 1, characterized in that: The two horizontal adjusting rods (3) are fixedly connected through a second connecting plate (10), and the two diagonal adjusting rods (2) arranged diagonally are fixedly connected through a first connecting plate (9).

5. An automatic centering and rapid positioning tooling for two fixed and six moving points of an arc workpiece according to claim 1, characterized in that: The pressing mechanism (13) includes a pressing plate (16) driven by a cylinder to lift and lower.

6. An automatic alignment and rapid positioning tooling for two fixed and six moving points of an arc-shaped workpiece according to claim 5, characterized in that: The size of the pressing plate (16) is smaller than the size of the arc-shaped relief groove (4), and pressing wheels (15) are rotatably connected to the four corners of the pressing plate (16).

7. An automatic centering and rapid positioning tooling for two fixed and six moving points of an arc-shaped workpiece according to claim 1, characterized in that: On the outer side of the positioning table (5) along the length direction of the arc-shaped relief groove (4), there is a clamping mechanism (14), and the clamping mechanism (14) acts on the two axial ends of the blank workpiece (8) to clamp and fix it.

8. An automatic centering and rapid positioning tooling for two fixed and six moving points of an arc workpiece according to claim 1, characterized in that: The length of the blank workpiece (8) is greater than the length of the positioning table (5).

Images