Flexible positioning device for synchronously milling double-sided steel

Abstract

A flexible positioning device for synchronous milling of double-sided steel comprises a supporting table and two positioning plates hinged to each other. One end of the positioning plate is slidably arranged on the supporting table, and the other end of the positioning plate is hinged. Each set of mechanism is composed of a transverse sliding rail and a vertical sliding rail, and the vertical sliding rail is provided with a flexible positioning assembly. The assembly can provide elastic supporting force when making contact with a workpiece, collision is avoided, and the workpiece is fixed in an adsorption mode. The clamping device has the advantages that the clamping angle can be adjusted through the hinged positioning plate and the sliding connection structure, and the clamping device meets the machining requirements of steel of different sizes and shapes. The transverse sliding rails and the vertical sliding rails are arranged in a crossed mode to form a two-dimensional adjusting system, so that the flexible positioning assembly can be freely positioned in a plane, and the requirement for multiple machining sites is met. By means of the design, the flexibility and applicability of the device are remarkably improved, and an efficient solution is provided for synchronous milling of the double-face steel.

Description

TECHNICAL FIELD

[0001] The utility model relates to a positioning device, especially a flexible positioning device for synchronous milling of double-sided steel. BACKGROUND

[0002] In the prior art, the positioning device of a communication steel tower is mainly used for accurately positioning the tower foot during installation and maintenance to ensure the stability and safety of the overall structure of the steel tower. Typical application scenarios include communication base station construction, power transmission tower erection, and wind power equipment support, etc. During use, the positioning device is usually connected to the tower foot through rigid fixation and position adjustment is completed with the help of external measuring equipment, and then the two end faces of the tower corner are simultaneously machined by the milling devices arranged on both sides of the positioning device. However, this positioning method has certain limitations in actual operation.

[0003] The main defect of the prior art is that the rigid positioning method is easy to cause different degrees of scratches on the surface of the tower foot, affecting the long-term service life and corrosion resistance of the steel tower. In addition, due to the differences in size and shape of tower feet of communication steel towers of different specifications, the adaptability of the existing positioning device is poor, and it is difficult to flexibly adjust to meet the needs of various models, resulting in reduced construction efficiency and increased additional costs. These problems need to be solved through technical improvement. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides a flexible positioning device for synchronous milling of double-sided steel.

[0005] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: a flexible positioning device for synchronous milling of double-sided steel, comprising a support table, two mutually hinged positioning plates are arranged on the support table, the other end of the positioning plate is slidingly arranged on the support table, a plurality of groups of flexible positioning mechanisms are arranged on each positioning plate, the flexible positioning mechanism comprises a plurality of groups of horizontal sliding rails and vertical sliding rails slidingly arranged on the horizontal sliding rails and perpendicular to the horizontal sliding rails, a flexible positioning assembly is slidingly arranged on the vertical sliding rails, the flexible positioning assembly can provide elastic support force for the workpiece when in contact with the workpiece to prevent the workpiece from impacting on the flexible positioning assembly, and the flexible positioning assembly fixes the workpiece on the positioning plate by adsorption after the workpiece is placed.

[0006] The utility model discloses the beneficial effect is: through double hinged positioning plate and sliding connection structure, realized workpiece clamping angle's adjustability, can adapt to the steel processing demand of different size and shape. The cross arrangement of horizontal slide rail and vertical slide rail forms two -dimensional adjustment system, makes flexible positioning assembly can be positioned freely in plane, satisfies the positioning demand of multiple processing site. The elastic support characteristic of flexible positioning assembly can effectively buffer the impact when workpiece is placed, avoids the surface damage caused by rigid contact, and adsorption fixed mode can keep the positioning stability and do not influence milling operation. As a preferred mode, horizontal slide rail can adopt servo motor drive ball screw and realize accurate positioning, and vertical slide rail realizes accurate fine adjustment through linear motor cooperation position sensor, and the both collaborative work can quickly match the processing coordinate system of different workpieces. Another embodiment, the bottom of flexible positioning assembly can be provided with spring buffer structure, and the impact energy is absorbed through the spring group of different rigidity, and simultaneously, the contact pressure is monitored in real time by using air pressure sensor, and dynamic compliance control is realized.

[0007] Further, the flexible positioning assembly includes a suction cup disposed on the vertical slide rail, the suction cup is trumpet-shaped and gradually increases towards the side away from the vertical slide rail, the suction cup includes a support section and an elastic section, the elastic section is located further outside the trumpet-shaped suction cup than the support section, and the material hardness of the support section is greater than that of the elastic section.

[0008] The trumpet-shaped suction cup design realizes the hierarchical buffer function through a split structure, the flexible material of the elastic section can effectively absorb the initial contact impact, and the high hardness characteristic of the support section ensures the stability of the final positioning. The gradually expanding opening structure is beneficial to expand the adsorption area, and adapts to the positioning requirements of curved or special-shaped workpieces. As a preferred mode, the support section can be injection molded by using polyurethane composite material, and the surface is provided with anti-skid lines, and the elastic section is combined with the support section by using a silicon rubber material through a co-injection process to form a gradient hardness transition. In another embodiment, a multi-chamber structure can be provided inside the suction cup, and each chamber is connected to a negative pressure source through an independent air duct, which can automatically compensate the air pressure when detecting local seal failure, ensuring the adsorption reliability. The combination part of the support section and the elastic section can be designed as a bellows structure, allowing axial micro-displacement to compensate for workpiece deformation.

[0009] Further, the flexible positioning assembly further includes a negative pressure air source, and an air pipe is connected between the negative pressure air source and the suction cup.

[0010] The independent setting of the negative pressure air source realizes accurate control of the adsorption force, and the negative pressure intensity can be automatically adjusted according to the weight of the workpiece. The flexible connection mode of the air pipe ensures smooth air passage when the positioning assembly moves. As a preferred mode, the air pipe can adopt a spiral telescopic conduit structure, an electrically conductive wire is embedded in the conduit to realize signal transmission of the displacement sensor, and a wear-resistant coating is arranged on the outer wall of the conduit to improve the service life. In another embodiment, a coil spring type air pipe storage device is arranged on the back of the positioning plate, and the tension adjusting mechanism is used to keep the air pipe in an unfolded state to avoid winding during movement. A multi-channel rotary joint can also be provided to ensure continuous communication of the air path when the rotating disc rotates, thereby ensuring the stability of the adsorption force during machining.

[0011] Further, the support table is fixed with telescopic cylinders, the telescopic cylinders are arranged on one side of the two positioning plates and the telescopic ends thereof are hinged to one end of the positioning plates, and the telescopic cylinders change the arching angle of the two positioning plates to adapt to more tower angle specifications.

[0012] The symmetrical arrangement of the telescopic cylinders realizes accurate synchronous adjustment of the clamping angle of the positioning plates, and different curvature workpieces can be quickly matched by changing the arching angle. The application of double-acting hydraulic cylinders or electric push rods can realize stepless angle adjustment, and an angle sensor is used to form a closed-loop control system. As a preferred mode, the telescopic cylinders can adopt a double-rod structure, and the two ends are respectively connected to the hinge points of the positioning plates and the support table, and a synchronous controller is used to ensure the consistency of the displacements on both sides. In another embodiment, a guide rail is arranged on the support table, and a sliding block is arranged at the bottom of the positioning plate and matched with the guide rail, so that when the telescopic cylinder pushes the positioning plate, the sliding block slides along the guide rail to further prevent the positioning plate from being separated from the telescopic cylinder, and a self-locking mechanism is arranged to fix the selected angle.

[0013] Further, the support table is a rotating disc, and the telescopic cylinders, the positioning plates and the flexible positioning mechanism are arranged on the rotating disc.

[0014] The arrangement of the rotating disc expands the machining freedom, so that the workpiece can be machined in multiple directions in a fixed state, and is particularly suitable for complex workpieces that need to be milled on multiple sides. The linkage control of the rotating drive system and the milling equipment can improve the machining efficiency. As a preferred mode, the rotating disc adopts a precision harmonic reducer driven by a servo motor, and an optical encoder is used to realize high positioning accuracy. Crossed roller bearings are arranged at the bottom of the rotating disc to bear the composite load in the axial and radial directions, and pneumatic locking pins are arranged at the edges to realize rigid fixation during machining. In another embodiment, the rotating disc can be designed as a double-layer structure, the lower layer is a fixed base integrated with an electrical slip ring, and the upper layer rotating platform realizes dynamic connection of the air path and the circuit through a magnetic fluid seal, thereby ensuring the reliability of medium transmission during continuous rotation. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The shaft view of the embodiment of the utility model;

[0016] Figure 2 It is the partial enlarged view of the flexible positioning mechanism of the embodiment of the utility model;

[0017] Figure 3 It is the sectional view of the suction cup of the embodiment of the utility model;

[0018] Figure 4 It is the front view of the embodiment of the utility model. DETAILED DESCRIPTION

[0019] The flexible positioning device for synchronous milling of double-sided steel of the embodiment of the utility model as shown in the figure: Figures 1-4 It includes the support table 1 of the rotatable rotary disc, the surface of the support table 1 is equipped with two mutually hinged positioning plates 2, the hinged end 21 of the two positioning plates 2 is connected through the rotating shaft, and the other end is slidably connected with the sliding groove on the support table 1 through the sliding block 22; the surface of each positioning plate 2 is uniformly equipped with a plurality of groups of flexible positioning mechanisms 3; each group of flexible positioning mechanisms 3 comprises a horizontal sliding rail 31, a vertical sliding rail 32 perpendicular to the horizontal sliding rail 31 is slidably installed on the horizontal sliding rail 31, and the vertical sliding rail 32 is provided with a flexible positioning assembly 4 which can slide thereon.

[0020] The flexible positioning assembly 4 comprises a horn-shaped suction cup 41, the opening of the horn-shaped suction cup 41 faces the outside and the diameter gradually expands, the horn-shaped suction cup 41 is composed of a supporting section 411 and an elastic section 412, the supporting section 411 is made of hard plastic, the elastic section 412 is made of silica gel material and extends to the edge of the opening of the horn-shaped suction cup, the horn-shaped suction cup 41 is connected with a negative pressure air source 5 through an air pipe 42, and the negative pressure air source 5 is fixed to the back of the positioning plate 2. Two groups of telescopic cylinders 6 are symmetrically installed on the two sides of the lower support table 1, and the piston rod end 61 of each group of telescopic cylinders 6 is hingedly connected with the sliding block 22 of the corresponding positioning plate 2.

[0021] The working principle is as follows: during operation, the horizontal sliding rail 31 and the vertical sliding rail 32 are first adjusted to make the flexible positioning assembly 4 in a non-processing position, then the workpiece is placed between the two positioning plates 2, the elastic section 412 of the flexible positioning assembly 4 is deformed to buffer the impact force when contacting the workpiece, so that each horn-shaped suction cup 41 uniformly contacts the surface of the workpiece, then the negative pressure air source 5 is started to adsorb and fix the workpiece through the horn-shaped suction cup 41, the arching angle of the positioning plate 2 is adjusted through the telescopic cylinder 6 to adapt to workpieces with different angles, and the support table 1 can drive the workpiece to rotate as a whole during the processing process, so that the rapid surface changing operation of double-sided milling is realized.

[0022] As a preferred mode, a plurality of elastic supporting structures 7 are arranged on the back of the positioning plate 2, one end of the elastic supporting structure 7 is hingedly connected to the positioning plate 2, so as to provide buffering for the positioning plate 2 when the workpiece is placed on the positioning plate 2.

[0023] The above embodiment is only one of preferred specific embodiments of the present application, and common changes and replacements made by those skilled in the art within the technical scheme of the present application are included in the protection scope of the present application.

Claims

1. A flexible positioning device for simultaneous milling of double-sided steel material, comprising a support table, characterized in that: The support table is provided with two positioning plates hinged to each other, the other end of the positioning plates is slidingly arranged on the support table, a plurality of groups of flexible positioning mechanisms are arranged on each positioning plate, the flexible positioning mechanism comprises a plurality of groups of horizontal sliding rails and vertical sliding rails slidingly arranged on the horizontal sliding rails and perpendicular to the horizontal sliding rails, a flexible positioning assembly is slidingly arranged on the vertical sliding rails, the flexible positioning assembly can provide elastic supporting force for the workpiece when in contact with the workpiece to prevent the workpiece from impacting on the flexible positioning assembly, and the flexible positioning assembly can fix the workpiece on the positioning plate through adsorption after the workpiece is placed.

2. The flexible positioning device for simultaneous milling of both sides of a steel product according to claim 1, characterized in that: The flexible positioning assembly comprises a suction cup arranged on the vertical sliding rail, the suction cup is trumpet-shaped and gradually increases towards the side away from the vertical sliding rail, the suction cup comprises a supporting section and an elastic section, the elastic section is located on the outer side of the trumpet-shaped suction cup compared with the supporting section, and the material hardness of the supporting section is greater than that of the elastic section.

3. The flexible positioning device for simultaneous milling of both sides of a steel product according to claim 2, characterized in that: The flexible positioning assembly further comprises a negative pressure gas source, and a gas pipe is connected between the negative pressure gas source and the suction cup.

4. The flexible positioning device for simultaneous milling of both sides of a steel product according to claim 1, characterized in that: A telescopic cylinder is fixed on the support table, the telescopic cylinder is arranged on one side of the two positioning plates and the telescally extendable end of the telescopic cylinder is hinged to one end of the positioning plate, and the telescopic cylinder changes the arching angle of the two positioning plates to adapt to more tower angle specifications.

5. The flexible positioning device for simultaneous milling of double-sided steel material according to claim 4, characterized in that: The support table is a rotating disc, and the telescopic cylinder, the positioning plate and the flexible positioning mechanism are arranged on the rotating disc.

Images