CN111854650A - An assembly detection device for a piston assembly of an actuating part - Google Patents

Abstract

The invention discloses an assembly detection device for a piston assembly of an actuating part, comprising a clamping and positioning module, a tightening module, an adjustment module and a detection module. The adjustment module includes a guide-slider, a support block connected with the slider, and a screw rod. , servo motor, the clamping and positioning module includes a three-jaw chuck, an intermediate support mechanism and a spline-type ratchet positioning mechanism, and the motor output shaft of the tightening module is connected with the three-jaw chuck; the spline-type ratchet positioning mechanism is arranged on the fixed block. , One end of the tailstock piston in the piston assembly is assembled in the spline-type ratchet positioning mechanism, the other end is inserted into the mounting end of the end ring piston and placed on the intermediate support mechanism, and the other end of the end ring piston is clamped on the three pawls Inside the chuck; the detection module is installed on the fixed block and used to detect the coaxiality of the piston assembly. The device can ensure that the assembly of the piston assembly meets the technological requirements, and measures the coaxiality of the two parts of the assembly through a rapid detection method, thereby ensuring the assembly quality of the piston assembly.

Description

An assembly detection device for a piston assembly of an actuating part

technical field

The invention relates to the technical field of advanced digital assembly manufacturing and automation, in particular to an assembly detection device for a piston assembly of an actuating part.

Background technique

Modern commercial aircraft have high requirements for safety, reliability and economy. As a civil aircraft that can be put into airline operation, it must pass the strict examination and approval of relevant civil aviation bureaus. As a highly integrated product integrating mechanics, electricity, hydraulics, magnetism, force and control, the civil flight control hydraulic actuation system is one of the core systems of modern aircraft, which is related to the safety and comfort of the aircraft, and is the focus of review by the airworthiness authorities. object. In order to meet the control requirements of different types of aircraft and different parts of the aircraft, its key power actuator actuators need to serve reliably under severe working conditions such as high oil pressure, high temperature difference, low air pressure, and strong corrosive media. This puts forward more stringent requirements for the assembly accuracy and quality stability of the flight control hydraulic actuating components.

Piston tightening is a crucial step in the assembly of the flight control hydraulic actuating components. The piston assembly is shown in Figure 1 and consists of an end ring piston and a tailstock piston. This assembly process directly affects the reliability and life of the actuating components. This assembly process requires the rapid tightening of the tailstock piston and the end ring piston, and the precise control of the tightening torque of the tailstock piston and the end ring piston to ensure the assembly coaxiality of the two piston parts. At present, the method of manual-driven, mechanically-assisted, and post-inspection is adopted for the tightening and assembly of the piston, and the assembly process of components is completed manually by craftsmen.

With the development of aviation technology, the above assembly methods gradually exposed the following problems:

1. The matching threads of the two parts are long, and the manual tightening efficiency is low. It requires workers to hold the parts for a long time to tighten the operation, which is labor-intensive and difficult to work continuously;

2. It is difficult to fix the piston during the tightening operation, and it is easy to damage the parts by relying only on the hands of the workers;

3. The fixed torque tightening tooling currently used is inconvenient to operate, and requires two people to cooperate to complete it;

4. If the post-inspection fails, the components need to be disassembled and re-selected for assembly, which seriously affects the work efficiency and even causes irreversible damage to the parts.

Therefore, in view of the above problems, it is necessary to provide a new assembly method of the piston assembly.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an assembly detection device for the piston assembly of the actuating part, so as to solve the problems existing in the above-mentioned prior art, so as to ensure that the assembly of the piston assembly meets the technological requirements, and to measure the two parts of the piston assembly through a rapid detection method. The coaxiality of each part ensures the assembly quality of the piston assembly.

In order to achieve the above object, the present invention provides the following solutions: the present invention provides an assembly detection device for a piston assembly of an actuating part, including a clamping and positioning module, a tightening module, an adjustment module and a detection module, and the adjustment module includes a guide rail -The sliding block and the supporting block connected with the sliding block, the screw rod, the servo motor, the clamping and positioning module includes a three-jaw chuck, an intermediate support mechanism and a spline-type ratchet positioning mechanism, and the motor of the tightening module is installed in the the outer side of the support block, the output shaft of the motor passes through the support block and is connected to the three-jaw chuck installed on the other side of the support block, and the motor is used to drive the three-jaw chuck to rotate; the The spline-type ratchet positioning mechanism is arranged on the fixed block, one end of the tailstock piston in the piston assembly is clamped in the spline-type ratchet positioning mechanism, and the other end is inserted into the mounting end of the end ring piston and placed on the On the intermediate support mechanism, the other end of the end ring piston is clamped in the three-jaw chuck; the detection module is mounted on the fixed block and is used to detect the coaxiality of the piston assembly.

Preferably, the adjustment module includes an adjustment mounting plate, a screw rod, a slider and a servo motor, the guide rails are arranged on the adjustment mounting plate and are located on both sides of the screw rod, the slider and the screw rod The screw nut is fixed on the slider, the slider is slidably installed on the guide rail, and the servo motor is used to drive the screw to rotate; the support block is fixedly installed on the top of the slider and follows the The sliders move synchronously.

Preferably, the splines at one end of the tailstock piston are fixed to the ratchet of the spline-type ratchet positioning mechanism through splines.

Preferably, the intermediate support mechanism includes two support plates, one of which is disposed on the fixing block and is close to the spline-type ratchet positioning mechanism, and the other support plate is disposed at the end of the guide rail and close to the At the fixed block, the top heights of the two support plates are the same.

Preferably, the top of the support plate is provided with a V-shaped groove or a U-shaped groove, a flexible contact surface is provided at the V-shaped groove or the U-shaped groove, and the outer wall surface of the piston assembly is in contact with the flexible contact surface for support.

Preferably, flexible contact surfaces are provided on the jaws of the three-jaw chuck, and the other end of the end ring piston in the piston assembly is in contact with the flexible contact surface on the three-jaw chuck for clamping.

Preferably, the motor in the tightening module is a second servo motor, and the second servo motor is used to drive the three-jaw chuck on the other side of the support block to drive the piston assembly to rotate and tighten.

Preferably, the detection module adopts a laser sensor, the laser sensor is arranged on one side of the fixed block, and the laser sensor is used to measure the distance change between the outer wall of the piston assembly and the sensor to detect the coaxiality of the piston assembly Spend.

The present invention has achieved the following beneficial technical effects with respect to the prior art:

The assembly and detection device for the piston assembly of the actuating part in the present invention ensures that the tailstock piston and the end ring piston can be tightened with the constant torque required by the process by designing appropriate piston clamping, positioning, tightening and detection mechanisms; Design the corresponding detection structure to ensure that the coaxiality of the piston assembly meets the design requirements. The device can ensure that the assembly of the piston assembly meets the technological requirements, and measures the coaxiality of the two parts of the assembly through a rapid detection method, thereby ensuring the assembly quality of the piston assembly.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the structural schematic diagram of the piston assembly of the actuating part;

2 is a schematic diagram of the overall structure of an assembly detection device for an actuating component piston assembly;

Fig. 3 is the composition diagram of clamping and positioning module;

Fig. 4 is the clamping diagram of the piston assembly by the tightening module and the clamping and positioning module;

Fig. 5 is the structural composition diagram of the adjustment module;

6 is a schematic diagram of the installation position of the detection module;

Among them, 1 end ring piston; 2 tailstock piston; 3 servo motor one; 4 slider; 5 guide rail; 6 servo motor two; 7 support block; 8 three-jaw chuck; 9 intermediate support mechanism; 10 spline type ratchet positioning Mechanism; 11 Laser Sensors; 12 Ratchet.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The purpose of the present invention is to provide an assembly detection device for the piston assembly of the actuating part, so as to solve the above-mentioned problems in the prior art, so as to ensure that the assembly of the piston assembly meets the technological requirements, and to measure the two components of the assembly through a rapid detection method. The coaxiality of the parts ensures the assembly quality of the piston assembly.

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

As shown in Figures 1-6, the present invention provides an assembly detection device for a piston assembly of an actuating part, including a clamping and positioning module, a tightening module, an adjustment module and a detection module. Support block 7, the clamping and positioning module includes a three-jaw chuck 8, an intermediate support mechanism 9 and a spline-type ratchet positioning mechanism 10, the motor of the tightening module is installed on the outside of the support block 7, and the output shaft of the motor passes through the support block 7 It is connected with the three-jaw chuck 8 installed on the other side of the support block 7. The motor is used to drive the three-jaw chuck 8 to rotate, and it is tightened according to the set process parameters; the spline-type ratchet positioning mechanism 10 is arranged on the fixed block. One end of the tailstock piston 2 in the piston assembly is clamped in the spline-type ratchet positioning mechanism 10, and the other end is inserted into the mounting end of the end ring piston 1 and placed on the intermediate support mechanism 9. The other end is clamped in the three-jaw chuck 8; the detection module is installed on the fixed block and used to detect the coaxiality of the piston assembly.

Specifically, the present invention is used for the assembly of the piston assembly of the actuating part of the aircraft steering gear. The piston assembly is shown in Figure 1, which can ensure the flexible clamping of the end ring piston 1 and the tailstock piston 2, and can accurately locate and quickly perform the two pistons. After tightening, the coaxiality detection can also be carried out, thereby improving the assembly efficiency of the piston assembly, ensuring the consistency of the product, and reducing the labor intensity of workers.

As shown in Figure 2, the assembly detection device used for the piston assembly of the actuating part is fixed on the horizontal table during operation, and is used to tighten the piston assembly of the actuating part of the aircraft steering gear, and perform inspection to complete the assembly. Each contact surface of the three-jaw chuck 8, the intermediate support mechanism 9 and the spline-type ratchet positioning mechanism 10 in the clamping and positioning module is provided with protective rubber, which is used to clamp the tailstock piston 2 and the end ring piston 1. Positioned on the same axis, the rubber on the contact surface can protect the parts and avoid scratching the parts during the assembly process. At the same time, the ratchet wheel 12 in the spline-type ratchet wheel positioning mechanism 10 can ensure that one end of the piston assembly is fixed during the tightening process. In the subsequent detection module, the piston assembly is reversely rotated to meet the requirements of coaxiality measurement. The tightening module is driven by a torque-controllable high-precision servo motor 26 to drive the three-jaw chuck 8 to rotate, which is used to quickly screw on the piston assembly with a small torque, and complete the fixed torque tightening according to the torque required by the process; the adjustment module is set in the Adjust the servo motor 1 3, the slider 4 and the guide rail 5 on the mounting plate. The system composed of the slider 4, the guide rail 5 and the servo motor 1 3 can adjust the spline type ratchet positioning mechanism 10 and the clamping three-jaw chuck 8. The distance between them can meet the assembly of different types of piston assemblies; for the detection module, a high-precision laser displacement sensor is added on the basis of the quick-tightening module, because there is a ratchet 12 at the spline-type ratchet positioning mechanism 10. It can be rotated directly in the opposite direction, and data is collected by means of distance measurement by the laser sensor 11, which is used to measure the coaxiality of the piston assembly after the assembly is completed.

In this embodiment, the clamping and fixing methods of the piston assembly are as follows: the splines at one end of the tailstock piston 2 are fixed to the ratchet wheel 12 of the spline-type ratchet wheel positioning mechanism 10 through splines. The intermediate support mechanism 9 includes two support plates, one of which is arranged on the fixing block and is close to the spline-type ratchet positioning mechanism 10, and the other is arranged at the end of the guide rail 5 and is close to the fixing block. the top height is the same. The top of the support plate is provided with a V-shaped groove or a U-shaped groove, the V-shaped groove or the U-shaped groove is provided with a flexible contact surface, and the outer wall surface of the piston assembly is in contact with the flexible contact surface for support.

The working process of the assembly detection device for the piston assembly of the actuating part of the present invention is as follows:

First of all, at the beginning of the assembly work, the position of the support block 7 is determined according to the model of the piston assembly, and the position of the support block 7 is adjusted by the slider 4, and the servo motor 1 3 adjusts the position of the slider 4 through the screw rod to adapt to different types of pistons components.

Next, the piston assembly is clamped and positioned; after the position of the support block 7 is adjusted, the position of the three-jaw chuck 8 is also determined accordingly. Clamp the spline teeth at one end of the pre-assembled piston assembly tailstock piston 2 with the spline-type ratchet positioning mechanism 10, and clamp the other end through the three-jaw chuck 8, and the intermediate support mechanism 9 is used to support the piston assembly. The three-jaw chuck 8 and the piston assembly are tightly clamped to realize subsequent tightening steps, and the clamping force is controllable to ensure that the clamped parts do not rotate and the surface of the parts is not damaged. Each jaw of the three-jaw chuck 8 is covered with rubber to prevent scratches on the surface of the parts. The splines on the spline-type ratchet positioning mechanism 10 are locked with the splines of the parts, and the other end of the assembly is fixed. At the same time, due to the existence of the ratchet wheel 12 on the mechanism, it cannot be rotated in one direction, which plays a fixed role for tightening, and can be rotated in the other direction for coaxiality measurement. The intermediate support mechanism 9 plays a supporting role before tightening, reducing the stress of the connecting thread between the two parts of the piston assembly, protecting the thread, preventing damage to the thread and affecting the sealing performance of the assembly.

Again, tighten the piston assembly. At the high speed required by the process, use a small torque to quickly tighten the piston assembly to the set small torque; then, use the rated torque required by the assembly to tighten the piston assembly at a low speed to complete the piston tightening step. In the whole process, the speed and torque of the motor are set in the process parameter library, and the switching parameters are carried out automatically, without manual operation, only need to input the model of the piston assembly before starting.

Finally, the coaxiality of the piston assembly is detected. The core mechanism of the module is the laser sensor 11, and the rest of the mechanisms are completed with the cooperation of the aforementioned mechanisms. The assembled piston assembly is driven by the second servo motor 6 to rotate, and the rotating direction is opposite to the tightening direction. Due to the existence of the ratchet 12 , this process can be completed without additional operations. When the piston assembly rotates, the laser sensor 11 measures the distance from the outer wall of the piston assembly to achieve the purpose of measuring the coaxiality.

In this embodiment, the clamping and positioning module is in direct contact with the two pistons, and it is necessary to increase the surface flexibility to ensure that the parts can be clamped and positioned without being scratched by the clamping mechanism; the tightening module should take into account both rapid tightening and constant torque tightening. It needs to rotate quickly under a small torque, and then rotate slowly under a large torque; the adjustment module needs to be adjusted according to the part size information in the process parameter library to ensure that it can be applied to the assembly of parts of different models and specifications; Quickly perform non-destructive testing under the condition of re-clamping parts to ensure the reliability of parts assembly.

The three-jaw chuck 8 can flexibly adjust the clamping force while fast clamping. At the same time, weakly rigid and flexible objects are installed on the clamping jaws to prevent the clamping jaws from scratching the parts and ensure that the parts are clamped without damaging the parts. The other end of the clamping mechanism is a spline, which corresponds to the spline of the piston, which can be quickly clamped, and plays a role in positioning, ensuring that the axis of the part and the axis of the chuck are on the same axis.

The tightening module requires the use of a suitable servo motor to ensure that the speed and torque are controllable. The speed and torque are selected according to the assembly process parameters of the piston assembly. According to the selected servo motor, a suitable PLC is required to control it. According to the process of the parts to be assembled It is required to adjust the working parameters to complete the tightening action of the piston assembly, including quick tightening and constant torque tightening.

The adjustment module requires the selection of the appropriate screw rod, guide rail 5 and slider 4. The stroke distance is selected according to the length range of the piston assembly. According to the selected screw rod, guide rail 5 and slider 4, the appropriate servo motor is required to be selected. The PLC in the module realizes automatic control to ensure that the remaining modules can be adjusted to the working position to complete the assembly of different types of parts.

The detection module requires the selection of a suitable laser sensor 11, the range is determined according to the distance between the sensor on the device and the part, and the accuracy is determined according to the coaxiality required by the process to ensure that the coaxiality measurement of the piston assembly is met. At the same time, the piston assembly needs to be rotated during measurement, and a ratchet 12 is required to be connected between the spline-type clamping mechanism and the fixed seat to ensure rapid rotation in the opposite direction of tightening to realize coaxiality measurement.

It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. . Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the invention is to be defined by the appended claims rather than the foregoing description, which are therefore intended to fall within the scope of the claims. All changes that come within the meaning and range of equivalents of , are intended to be embraced within the invention, and any reference signs in the claims shall not be construed as limiting the involved claim.

In the present invention, specific examples are used to illustrate the principles and implementations of the present invention, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention; There will be changes in the specific implementation manner and application scope of the idea of the invention. In conclusion, the contents of this specification should not be construed as limiting the present invention.

Claims (8)

1. An assembly detection device for an actuating component piston assembly, characterized in that it comprises a clamping and positioning module, a tightening module, an adjustment module and a detection module, wherein the adjustment module comprises a support block slidably arranged on the guide rail, so The clamping and positioning module includes a three-jaw chuck, an intermediate support mechanism and a spline-type ratchet positioning mechanism. The motor of the tightening module is installed on the outside of the support block, and the output shaft of the motor passes through the support block and is installed. The three-jaw chuck on the other side of the support block is connected by transmission, and the motor is used to drive the three-jaw chuck to rotate; the spline-type ratchet positioning mechanism is arranged on the fixed block, and the tailstock piston in the piston assembly One end is clamped in the spline-type ratchet positioning mechanism, the other end is inserted into the mounting end of the end ring piston and placed on the intermediate support mechanism, and the other end of the end ring piston is clamped on the three The detection module is installed on the fixed block and used to detect the coaxiality of the piston assembly. 2 . The assembly detection device for the piston assembly of the actuating part according to claim 1 , wherein the adjustment module comprises an adjustment mounting plate, a screw rod, a sliding block and a servo motor, and the guide rail is arranged on the The adjustment mounting plate is located on both sides of the screw rod, the slider is fixed with the screw nut on the screw rod, the slider is slidably installed on the guide rail, and the servo motor is used for driving The screw rotates; the support block is fixedly mounted on the top of the slider and moves synchronously with the slider. 3 . The assembly detection device for an actuating part piston assembly according to claim 1 , wherein the spline at one end of the tailstock piston is fixed at the ratchet of the spline-type ratchet positioning mechanism through a spline. 4 . . 4 . The assembly detection device for the piston assembly of the actuating part according to claim 1 , wherein the intermediate support mechanism comprises two support plates, one of which is arranged on the fixed block and is close to the fixed block. 5 . In the spline-type ratchet positioning mechanism, another support plate is arranged at the end of the guide rail and is close to the fixing block, and the tops of the two support plates have the same height. 5 . The assembly detection device for the piston assembly of the actuating part according to claim 4 , wherein a V-shaped groove or a U-shaped groove is formed on the top of the support plate, and the V-shaped groove or the U-shaped groove is provided at the top of the supporting plate. 6 . There is a flexible contact surface, and the outer wall surface of the piston assembly is in contact with the flexible contact surface for support. 6 . The assembly detection device for a piston assembly of an actuating part according to claim 1 , wherein the jaws of the three-jaw chuck are provided with flexible contact surfaces, and the end ring in the piston assembly is provided with flexible contact surfaces. 7 . The other end of the piston is in contact with the flexible contact surface on the three-jaw chuck for clamping. 7 . The assembly detection device for the piston assembly of the actuating part according to claim 1 , wherein the motor in the tightening module is a second servo motor, and the second servo motor is used to drive the support block to another. 8 . The three-jaw chuck on one side drives the piston assembly to rotate and tighten. 8 . The assembly detection device for the piston assembly of the actuating part according to claim 1 , wherein the detection module adopts a laser sensor, the laser sensor is arranged on one side of the fixed block, and the laser The sensor is used to measure the distance change between the outer wall of the piston assembly and the sensor to detect the coaxiality of the piston assembly.

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