阅读说明：本技术 一种航空发动机燃油总管自动焊接气动式夹具 (Pneumatic type clamp for automatically welding fuel manifold of aircraft engine ) 是由 王天宇 洪家光 李宁 孟宪国 毕建侠 于 2021-08-31 设计创作，主要内容包括：本发明公开一种航空发动机燃油总管自动焊接气动式夹具,包括圆形底座、支座、气缸、拉杆、压板和气动控制系统；支座垂直的固定在圆形底座的外边缘上,在支座的侧面固定安装由气缸和拉杆组成的气动式结构,气动式结构在气动控制系统的控制下,由气缸带动连接在上面的拉杆进行垂直于圆形底座的伸缩运动；在拉杆远离气缸的顶端设置压板,通过拉杆拉动压板下压后将燃油总管夹持于压板和支座之间。夹具还包括T形定位夹块,用于定位燃油总管上的马鞍喷杆。本发明结构简单,焊接定位精度较高,不仅降低了人工成本,还提高了燃油总管的整体焊接质量。(The invention discloses a pneumatic type clamp for automatically welding an aircraft engine fuel manifold, which comprises a circular base, a support, a cylinder, a pull rod, a pressing plate and a pneumatic control system, wherein the support is arranged on the circular base; the support is vertically fixed on the outer edge of the round base, a pneumatic structure consisting of an air cylinder and a pull rod is fixedly installed on the side surface of the support, and the pneumatic structure is controlled by a pneumatic control system to drive the pull rod connected to the pneumatic structure to perform telescopic motion vertical to the round base; the top end of the pull rod, which is far away from the cylinder, is provided with a pressure plate, and the fuel manifold is clamped between the pressure plate and the support after the pressure plate is pulled to be pressed down by the pull rod. The clamp also comprises a T-shaped positioning clamping block for positioning a saddle spray rod on the fuel main pipe. The invention has simple structure and higher welding positioning precision, not only reduces the labor cost, but also improves the overall welding quality of the fuel oil header pipe.)

1. An automatic welding pneumatic type clamp for an aircraft engine fuel manifold is characterized by comprising a circular base, a support, a cylinder, a pull rod, a pressing plate and a pneumatic control system;

the pneumatic structure is controlled by a pneumatic control system, and the air cylinder drives the pull rod connected to the pneumatic structure to perform telescopic motion vertical to the round base;

the top end of the pull rod, which is far away from the cylinder, is provided with a pressure plate, and the fuel manifold is clamped between the pressure plate and the support after the pressure plate is pulled to be pressed down by the pull rod.

2. The aircraft engine fuel manifold automatic weld pneumatic fixture of claim 1, wherein: one end of the support far away from the circular base is provided with a semi-circular groove for supporting and positioning a fuel oil main pipe.

3. The aircraft engine fuel manifold automatic weld pneumatic fixture of claim 1, wherein: the edge of the round base is uniformly provided with a plurality of supports, and each support is respectively fixed with a pneumatic structure consisting of an air cylinder and a pull rod and a pressing plate.

4. The aircraft engine fuel manifold automatic weld pneumatic fixture of claim 1, wherein: the pneumatic control system comprises a control unit, a communication unit and a pneumatic circuit; and the control unit sends a control instruction to the pneumatic circuit through the communication unit to control the telescopic motion of the cylinder.

5. The aircraft engine fuel manifold automatic weld pneumatic fixture of claim 1, wherein: the cylinder is a rotary type compression cylinder, when the cylinder presses down, a cylinder guide rod can generate a 90-degree corner, and the pressing plate is in different positions in compression and loosening states, so that the clamping operation is facilitated.

6. The aircraft engine fuel manifold automatic weld pneumatic fixture of claim 4, wherein: the pneumatic circuit comprises an air guide pipe and an electromagnetic directional valve, and two exhaust ports of the electromagnetic directional valve are connected to an air inlet and an air outlet of the air cylinder through the air guide pipe.

7. The aircraft engine fuel manifold automatic weld pneumatic fixture of claim 6, wherein: a throttle valve and a speed regulating valve are arranged on the gas guide pipe connecting the cylinder and the electromagnetic directional valve in parallel.

8. The aircraft engine fuel manifold automatic weld pneumatic fixture of claim 6, wherein: two mufflers are arranged at two exhaust ports of the electromagnetic directional valve.

9. The automatic pneumatic welding clamp for the fuel manifolds of aircraft engines according to any one of claims 1 to 8, characterized in that: the clamp also comprises a T-shaped positioning clamping block, wherein two symmetrical ends of the T-shaped positioning clamping block are respectively provided with a through hole, positioning pins are respectively arranged in the through holes, and the positioning pins are connected with holes arranged at one end of the support far away from the circular base; the asymmetric end of the T-shaped positioning clamping block is provided with a bolt for positioning a saddle spray rod on a fuel oil main pipe.

Technical Field

The invention relates to the technical field of tool fixtures, in particular to a pneumatic fixture for automatically welding an aircraft engine fuel manifold.

Background

The welding quality and the processing technical requirements of the fuel manifold of the aircraft engine are high, the process is complex, the quality control is strict, and particularly, the welding of the saddle piece on the manifold meets the processing bottleneck. The traditional welding method for saddle members relies on a bolt type welding tool, the biggest problem of the tool is that the machining and adjusting time is long, the manufacturing period of a fuel oil main pipe is prolonged, the precision requirement of the bolt type welding tool during positioning is high, and the positioning difficulty is increased. In the manual welding process, a group of bolt type welding tools are used for positioning each saddle piece on the fuel oil main pipe, then manual argon arc welding is adopted for fixing the saddle pieces in a spot welding mode, and then the saddle pieces are taken down from the tools for full welding. Due to welding deformation, when a circle of saddle members are welded, the whole fuel manifold can generate welding deformation. Therefore, the conventional method also requires calibration using a check pin on the tool before the next welding operation can be performed. If the spray bar is welded directly after the saddle member is welded, the entire fuel rail can be severely out of tolerance under the influence of the weld distortion.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an automatic welding pneumatic clamp for an aircraft engine fuel manifold.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a pneumatic type clamp for automatically welding an aircraft engine fuel manifold comprises a circular base, a support, a cylinder, a pull rod, a pressing plate and a pneumatic control system;

the pneumatic structure is controlled by a pneumatic control system, and the air cylinder drives the pull rod connected to the pneumatic structure to perform telescopic motion vertical to the round base;

the top end of the pull rod, which is far away from the cylinder, is provided with a pressure plate, and the fuel manifold is clamped between the pressure plate and the support after the pressure plate is pulled to be pressed down by the pull rod.

Furthermore, one end of the support far away from the circular base is provided with a semi-circular groove for supporting and positioning the fuel manifold.

Furthermore, a plurality of supports are uniformly arranged on the edge of the circular base, and a pneumatic structure and a pressing plate which are composed of an air cylinder and a pull rod are respectively fixed on each support.

Further, the pneumatic control system comprises a control unit, a communication unit and a pneumatic circuit; and the control unit sends a control instruction to the pneumatic circuit through the communication unit to control the telescopic motion of the cylinder.

Furthermore, the cylinder is a rotary compression cylinder, when the cylinder presses down, a cylinder guide rod can generate a 90-degree corner, and the pressing plate is in different positions in compression and loosening states, so that the clamping operation is facilitated.

Furthermore, the pneumatic circuit comprises an air duct and an electromagnetic directional valve, and two exhaust ports of the electromagnetic directional valve are connected to an air inlet and an air outlet of the air cylinder through the air duct. Two mufflers are arranged at two exhaust ports of the electromagnetic directional valve.

Furthermore, a throttle valve and a speed regulating valve are arranged on the gas guide pipe which connects the cylinder and the electromagnetic directional valve in parallel.

Furthermore, the clamp also comprises a T-shaped positioning clamping block, wherein two symmetrical ends of the T-shaped positioning clamping block are respectively provided with a through hole, positioning pins are respectively arranged in the through holes, and the positioning pins are connected with holes arranged at one end of the support far away from the circular base; the asymmetric end of the T-shaped positioning clamping block is provided with a bolt for positioning a saddle spray rod on a fuel oil main pipe.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:

1. the automatic welding pneumatic type clamp for the fuel main pipe of the aircraft engine, provided by the invention, has the advantages of simple structure and higher welding positioning precision, the labor cost is reduced, and the overall welding quality of the fuel main pipe is improved.

2. The clamp can adopt an industrial controller to control the clamping and the loosening of a pneumatic structure, and carries out PROFINET communication with a welding robot, thereby not only improving the automation degree of welding, but also improving the welding efficiency of the tool clamp and finishing the operation with high quality and high efficiency.

Drawings

FIG. 1 is a schematic structural diagram of an automatic pneumatic welding fixture for an aircraft engine fuel manifold according to an embodiment of the invention;

FIG. 2 is a schematic cross-sectional view of an aircraft engine fuel manifold automatic welding pneumatic fixture in an embodiment of the invention;

FIG. 3 is a schematic structural diagram of a pneumatic control system according to an embodiment of the present invention;

FIG. 4 is a pneumatic circuit diagram according to an embodiment of the present invention;

FIG. 5 is an electrical control diagram of a solenoid operated directional valve in an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a T-shaped positioning block according to an embodiment of the present invention.

The device comprises an engine fuel manifold 1, an engine fuel manifold 2, a saddle spray rod 3, a base 4, a support 5, an air cylinder 6, a pressure plate 7, a T-shaped positioning clamp block 8, a communication unit 9, an electromagnetic reversing valve 10, a pull rod 11, a guard plate 12, a semi-circular groove 13, a connecting hole with the support, an air guide pipe 14, a silencer 15, a relay terminal table 16, a bus bar 17, a positioning pin 18, a plug 19 and a bushing 20.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

As shown in fig. 1, the automatic welding pneumatic fixture for the fuel manifold of the aircraft engine in the embodiment is as follows:

the clamp comprises a circular base 3, a support 4, a cylinder 5, a pull rod 10, a pressure plate 6 and a pneumatic control system;

the support 4 is vertically fixed on the outer edge of the circular base 3, a pneumatic structure consisting of an air cylinder 5 and a pull rod 10 is fixedly installed on the side surface of the support 4, the pneumatic structure is controlled by a pneumatic control system, the air cylinder 5 drives the pull rod 10 connected to the pneumatic structure to perform telescopic motion vertical to the circular base 4, and the schematic cross-sectional view of the clamp is shown in fig. 2;

the top end of the pull rod 10, which is far away from the air cylinder 5, is provided with a pressure plate 6, and the engine fuel manifold 1 is clamped between the pressure plate 6 and the support 4 after the pressure plate 6 is pulled to be pressed down by the pull rod 10.

Furthermore, one end of the support 4, which is far away from the circular base 3, is provided with a semi-circular groove 12 for supporting and positioning the fuel manifold 1.

Furthermore, a plurality of supports 4 are uniformly arranged on the edge of the circular base 4, and a pneumatic structure consisting of an air cylinder 5 and a pull rod 10 and a pressure plate 6 are respectively fixed on each support 4.

In the embodiment, the fixture is designed to be supported by 13 supports 4, interference parts which may appear are optimized in the tool design stage, the size of the pull rod hole of the tool support is reduced, and sharp edge and round corner processing is performed. And analyzing and summarizing fuel oil pipelines with different radiuses, and selecting bases 3 and supports 4 with different specifications.

Further, the pneumatic control system comprises a control unit, a communication unit 8 and a pneumatic circuit, as shown in fig. 3; the control unit sends a control instruction to the pneumatic circuit through the communication unit 8 to control the telescopic motion of the air cylinder 5.

In this embodiment, the control unit of the pneumatic control system is a PLC, a master-slave PROFINET communication mode is adopted between the control unit and the robot, and the KUKA robot communicates with the remote I/O through a PROFINET industrial ethernet and can be equipped with an option packet to support master station communication. The control unit communicates with the communication unit using a DB9 communication interface. The structure of the pneumatic circuit in this embodiment is schematically shown in fig. 4, and since the number of cylinders 5 on the jig is large, the bus 17 is used to install the electromagnetic directional valve 9, and 2 mufflers are provided at the exhaust port. Because the number of the air cylinders 5 on the clamp is large, the direction of the electromagnetic directional valve is controlled by adopting an electrical control chart shown in fig. 5 in the embodiment, and the telescopic control of the air cylinders is realized.

Further, the cylinder 5 is a rotary type pressing cylinder, when the cylinder 5 presses down, a cylinder guide rod can generate a 90-degree corner, and the pressing plate 6 is in different positions in pressing and loosening states, so that the clamping operation is convenient.

Further, the pneumatic circuit comprises an air duct 14 and an electromagnetic directional valve 9, and two exhaust ports of the electromagnetic directional valve 9 are connected to an air inlet and an air outlet of the air cylinder 5 through the air duct 14. Two mufflers 15 are arranged at two exhaust ports of the electromagnetic directional valve 9.

Furthermore, a throttle valve and a speed regulating valve are arranged in parallel on the air duct 14 connecting the cylinder 5 and the electromagnetic directional valve 9.

Further, the fixture further comprises a T-shaped positioning clamping block 7, the structure of which is shown in FIG. 6, wherein two symmetrical ends of the T-shaped positioning clamping block 7 are respectively provided with a through hole, positioning pins 18 are respectively arranged in the through holes, and the positioning pins 18 are connected with holes 13 arranged at one end of the support 4 far away from the circular base 3; the asymmetric end of the T-shaped positioning clamp block 7 is provided with a bolt 19 for positioning the saddle spray rod 2 on the fuel main pipe 1.

In the embodiment, the T-shaped positioning clamping block 7 is adopted to perform reference positioning of the first saddle spray rod 2 when the fuel header pipe 1 is clamped at each time, so that accurate welding of automatic welding equipment according to an automatic program is ensured after clamping. And because support 4 size is higher, can take place tremble when the car is processed, can design the strengthening rib on support 4, improve the intensity and the stability of support 4.