A process for strengthening the conical surface of an aviation pipe joint by rolling

Abstract

The application discloses a kind of aviation pipeline joint's roll light strengthening surface process, it is related to aviation pipe joint technical field.The process is executed by including roll light cutter and tool of numerical control equipment, roll light cutter is roller type structure, including: connecting roll light cutter with the main shaft of numerical control equipment;Aviation pipeline joint is placed between the clamping plate of tool, start button of numerical control equipment is started, and aviation pipeline joint is automatically clamped;Numerical control equipment is automatically executed according to preset numerical control program parameters, and main shaft drives roll light cutter to descend to preset position and then start rotating, and the roller in roll light cutter is used to roll light strengthening to the conical surface of aviation pipeline joint.The application adopts the process of roll light strengthening, and synchronous independent development special tool, cutter and special equipment, improve the roughness and shape error of conical surface, enhance the strength of conical surface, solve the problem of the quality consistency of the conical surface of joint body, ensure that no flared duct connection technology pipe fitting product is successfully applied in batch.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aviation pipe joints, in particular to a process for aviation pipe joint cone surface burnishing strengthening treatment. BACKGROUND

[0002] The pipe system in the aviation field adopts a large number of flared and non-flared pipe connection technology, the sealing technology of the pipe relies on the sealing of the cone surface of the pipe joint, and needs to withstand very high pressure, and has high service life requirements. Therefore, higher requirements are put forward for the surface quality of the cone surface of the joint body of the aviation pipe, such as the roughness, shape error and fatigue strength of the cone surface, which will have a greater impact on the performance and function of the product.

[0003] At present, different manufacturers have adopted different process methods to ensure the quality of the cone surface of the joint body. However, the effect is not very ideal, and the roughness and shape error of the cone surface of the product are generally large, the process capacity is insufficient, and the product cannot effectively meet the 100% qualification, and the scrap rate is high. Different process methods also lead to different manufacturing efficiency and manufacturing cost of the product, reducing the competitiveness of the product in the market. Therefore, how to solve these outstanding problems will become the key to the successful batch application of pipe joint technology. SUMMARY

[0004] In order to solve the consistency of the quality of the cone surface of the joint body, to improve the operation efficiency and reduce the manufacturing cost, and to ensure the smooth batch application of the pipe fitting product of the non-flared pipe connection technology, the present application provides a burnishing strengthening surface process for an aviation pipe joint by researching the burnishing strengthening process, adopts the burnishing strengthening process, synchronously develops special tooling, cutters and special equipment, improves the roughness and shape error of the cone surface, enhances the strength of the cone surface, and further meets the performance and function requirements of the product.

[0005] Therefore, the present application provides the following technical solutions:

[0006] The present application provides a burnishing strengthening surface process for an aviation pipe joint, which is executed by a numerical control equipment including a burnishing cutter and tooling. The burnishing cutter is of a roller structure and includes:

[0007] The burnishing cutter is connected with the main shaft of the numerical control equipment;

[0008] The aviation pipe joint is placed between the two clamping plates of the tooling, and the start button of the numerical control equipment is started, so that the aviation pipe joint is automatically clamped;

[0009] The numerical control equipment is automatically executed according to the preset numerical control program parameters, the main shaft drives the burnishing cutter to descend to the preset position and then starts to rotate, and the roller in the burnishing cutter performs burnishing strengthening on the cone surface of the aviation pipe joint.

[0010] Further, the roll polishing cutter comprises a handle, a nut, a cage and rollers; the working end of the roll polishing cutter has a cone structure, and the outer diameter of the working end gradually decreases in the direction towards the working end; the taper surface of the front end of the handle and the cage contain the rollers, and the cage is used for arranging a plurality of rollers.

[0011] Further, the front end of the cage is a solid cone structure, and a plurality of rollers are uniformly arranged outside the cone structure of the cage.

[0012] Further, the front end of the cage is a hollow cone structure, and a plurality of rollers are uniformly arranged inside the hollow cone structure of the cage.

[0013] Further, the tooling comprises:

[0014] The first clamping plate and the second clamping plate are the same in structure and size, the first clamping plate is located on the fixed seat and remains stationary, the second clamping plate is located on the movable seat, the movable seat is provided with a gas cylinder, and the movable seat is provided with a slide rail below; under the action of the gas cylinder, the movable seat can drive the second clamping plate to slide on the slide rail.

[0015] The fixed seat and the slide rail are located on the guide rail plate; the upper die plate is fixedly connected below the guide rail plate; the upper die plate and the lower die plate are fixedly connected through guide columns; and the space formed between the upper die plate and the lower die plate is fixedly provided with a pressure sensor, a mandrel and a spring.

[0016] Further, during the roll strengthening process, the pressure sensor acquires the force size of the roll polishing cutter applied to the sealing cone surface of the pipeline joint.

[0017] The numerical control equipment controls the roll polishing force of the roll polishing cutter according to the force size acquired by the pressure sensor.

[0018] Further, the main shaft is driven by a servo motor.

[0019] Further, after the roll strengthening is completed, the main shaft drives the roll polishing cutter to retreat to the initial position; and the aviation pipeline joint is released.

[0020] Advantages and positive effects of the present application:

[0021] 1. The roll polishing cutter of the present application is of a roller structure, and the rollers rotate by friction to roll, extrude and strengthen the cone surface of the product, thereby improving the strength of the surface of the product, and the rollers can be replaced as consumables.

[0022] 2. The present application controls the force during the roll process through the pressure sensor of the equipment, and the machining consistency is good, the variation is small, and the process capability meets the requirements of actual application.

[0023] 3、The application adopts servo motor to drive the rotation of the cutter, and the flexible connection mode is adopted between the cutter and the main shaft, the cutter is in contact with the taper surface of the joint during the rolling process, the position of the cutter can be automatically adjusted under the influence of the uniformity of the contact force, the coaxiality of the rolling cutter, guide rail and product is ensured, the machining consistency of the taper surface of the product after rolling is realized, and the rolling effect is stable.

[0024] 4、The numerical control machine tool equipment provided by the application has high automation degree, stable operation, low failure rate, high intelligence and high production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor under the premise of the drawings.

[0026] Figure 1 It is a whole schematic view of the device for the rolling strengthening surface process of the aviation pipeline joint in the embodiment of the application.

[0027] Figure 2 It is a structural schematic view of the rolling cutter in the embodiment of the application.

[0028] Figure 3 It is a structural schematic view of the tooling in the embodiment of the application.

[0029] Figure 4 It is a structural schematic view of the rolling cutter in the embodiment of the application.

[0030] Figure 5 It is another structural schematic view of the rolling cutter in the embodiment of the application.

[0031] In the figure, 1 is a rolling cutter, 2 is tooling, 3 is an aviation pipeline joint, 1.1 is a nut, 1.2 is a roller, 1.3 is a retainer, 1.4 is an adjusting pad, 1.5 is an inner sleeve, 1.6 is a bearing, 1.7 is a shaft handle, 1.8 is a lock ring, 2.2 is a fixed seat, 2.3 is a guide rail plate, 2.4 is an upper die plate, 2.5 is a guide column, 2.6 is a lower die plate, 2.7 is a pneumatic cylinder, 2.8 is a sliding rail, 2.9 is a pressure sensor, 2.10 is a mandrel, 2.11 is a spring, and 2.12 is a movable seat. DETAILED DESCRIPTION

[0032] In order to better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of the present application.

[0033] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0034] As shown in Figure 1 , which shows a rolling strengthening surface process of an aviation pipeline joint in an embodiment of the present application, the process is realized by using a numerical control device. The main body of the numerical control device is a numerical control machine tool, which mainly includes a product tool 2 and a rolling cutter 1. The product tool 2 is used to fix the product (the product refers to an aviation pipeline joint 3). The rolling cutter 1 is connected with the main shaft of the device, and the main shaft can drive the rolling cutter 1 to move axially according to the set numerical control program under the drive of the servo motor, to contact the aviation pipeline joint 3 fixed on the product tool 2 below, and to realize the rolling strengthening of the conical surface of the product.

[0035] The structure of the rolling cutter 1 is shown in Figure 2 , which mainly includes a nut 1.1, a roller 1.2, a retainer 1.3, an adjusting pad 1.4, an inner sleeve 1.5, a bearing 1.6, a shaft handle 1.7 and a lock ring 1.8. The working end of the rolling cutter head of the retainer 1.3 has a conical structure. The retainer 1.3 is used to arrange a plurality of rollers 1.2. When assembled, the nut 1.1 surrounds the rollers 1.2, the retainer 1.3, the adjusting pad 1.4, the inner sleeve 1.5 and the bearing 1.6, and connects with the shaft handle 1.7, and is compressed to form a whole by the lock ring 1.8. The servo motor of the main shaft of the device drives the adjustable speed rotation. When the roller 1.2 contacts the surface of the product, the roller 1.2 rolls around the conical surface of the product due to the existence of friction, and the retainer 1.3 is also rotated by the roller 1.2, so as to achieve the best rolling effect. The rolling cutter 1 has two structural forms, as shown in Figure 4 andFigure 5 As shown, the principles of the two are basically the same, and the inner cone and outer cone products can be respectively rolled and strengthened, and the equipment is universal. Specifically, Figure 2 The front end of the cage 1.3 in the middle rolling cutter 1 is a solid cone structure, and a plurality of rollers 1.2 are uniformly arranged outside the cone structure of the cage 1.3. During the process, the solid cone structure at the front end of the cage 1.3 can be extended into the product inside to roll and strengthen the inner cone product. Figure 3 The front end of the cage 1.3 in the middle rolling cutter 1 is a hollow cone structure, and a plurality of rollers 1.2 are uniformly arranged inside the hollow cone structure of the cage 1.3. During the process, the product can be extended into the hollow cone structure at the front end of the cage 1.3 to roll and strengthen the outer cone product.

[0036] The structure of the tooling 2 is shown in Figure 3 As shown, it mainly includes: clamping plate 2.1, fixed seat 2.2, guide rail plate 2.3, upper die plate 2.4, guide column 2.5, lower die plate 2.6, air cylinder 2.7, slide rail 2.8, pressure sensor 2.9, mandrel 2.10 and spring 2.11. Among them: the clamping plate 2.1 includes two pieces, the structure and size of the two clamping plates 2.1 are consistent, which can clamp and fix the product between the two clamping plates 2.1, the first clamping plate 2.1 is located on the fixed seat 2.2 and keeps still, the second clamping plate 2.1 is located on the movable seat 2.12, the movable seat 2.12 is provided with the air cylinder 2.7, and the movable seat 2.12 is provided with the slide rail 2.8 below, under the action of the air cylinder 2.7, the movable seat 2.12 can drive the second clamping plate 2.1 to slide on the slide rail 2.8, change the distance between the second clamping plate 2.1 and the first clamping plate 2.1, and clamp and fix products of various sizes. The fixed seat 2.2 and the slide rail 2.8 are located on the horizontal guide rail plate 2.3, the common height of the movable seat 2.12 and the slide rail 2.8 is close to the fixed seat 2.2, so as to keep the first clamping plate 2.1 and the second clamping plate 2.1 flush. The lower end of the guide rail plate 2.3 is fixedly connected with the upper die plate 2.4, the upper die plate 2.4 and the lower die plate 2.6 are fixedly connected through four guide columns 2.5, and the pressure sensor 2.9, the mandrel 2.10 and the spring 2.11 are sequentially arranged in the space between the upper die plate 2.4 and the lower die plate 2.6.

[0037] The pressure sensor 2.9 automatically calibrates zero before processing, and the numerical control lifting platform drives the rolling cutter 1 of the slide rail 2.8 to make axial reciprocating motion during work, so as to drive the rolling cutter 1 product to roll and work; the pressure sensor 2.9 is installed below the upper die plate 2.4, is connected in series with the rolling cutter 1 through connecting components, detects the rolling strengthening pressure in real time, and controls execution according to the preset force parameters. After the product is placed on the tooling 2, the product is automatically clamped by the air cylinder 2.7, the main shaft of the equipment drives the cutter to automatically roll and strengthen, returns to the initial position after completion, and the air cylinder 2.7 is automatically released.

[0038] The specific process is as follows:

[0039] S1, connect the rolling tool 1 with the equipment spindle; at this time, the rolling tool 1 is located at the initial position and does not contact the product;

[0040] S2, place the aviation pipeline joint 3 between the two clamping plates 2.1 of the equipment tool 2, start the equipment start button, the cylinder 2.7 in the tool 2 acts, drives the second clamping plate 2.1 to slide on the slide rail 2.8, and the aviation pipeline joint 3 is automatically clamped;

[0041] S3, the equipment automatically executes according to the preset numerical control program parameters, the servo motor drives the equipment spindle, drives the rolling tool 1 connected with the equipment spindle to descend to the preset position and then starts to rotate, and the rolling tool 1 performs rolling strengthening on the aviation pipeline joint 3 conical surface;

[0042] At the preset position, the rolling tool 1 can contact the aviation pipeline joint 3, such as the working end of the rolling tool 1 entering the inside of the aviation pipeline joint 3, or the working end of the rolling tool 1 surrounding the outside of the aviation pipeline joint 3.

[0043] S4, during the rolling strengthening process, the rolling principle is used, and the pressure sensor 2.9 obtains the force of the rolling tool 1 applied to the sealing conical surface of the pipeline joint;

[0044] S5, the equipment controls the rolling force of the rolling tool 1 according to the force obtained by the pressure sensor 2.9;

[0045] S6, after the rolling strengthening is completed, the equipment spindle drives the rolling tool 1 to retreat to the initial position; the cylinder 2.7 is loosened, and the aviation pipeline joint 3 can be taken out from the two clamping plates 2.1.

[0046] The numerical control program parameters are rich in content and are controlled from multiple dimensions, such as pressure, speed, number of revolutions, time, etc. The whole process is completely digitally controlled, and the automation degree is high. Except for feeding and discharging, no human intervention is needed. Moreover, the equipment has a safety protection function-safety light curtain, which prevents the body from being accidentally touched into the equipment during automatic operation and causes harm to the person.

[0047] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A process for the surface strengthening of an aircraft tubing fitting by rolling, characterized in that, The application relates to a numerical control device comprising a rolling tool (1) and a tooling (2), wherein the rolling tool (1) is in a roller (1.2) type structure and comprises the following steps. The rolling tool (1) is connected to the spindle of the numerical control device in a flexible connection mode. The aircraft pipeline joint (3) is placed between the two clamping plates of the tooling (2), and the start button of the numerical control device is started, so that the aircraft pipeline joint (3) is automatically clamped; The numerical control device automatically executes according to preset numerical control program parameters, the spindle drives the rolling tool (1) to descend to a preset position and then starts to rotate, and the roller (1.2) in the rolling tool (1) performs rolling strengthening on the conical surface of the aircraft pipeline joint (3); The rolling tool (1) comprises a nut (1.1), a roller (1.2), a retainer (1.3), an adjusting pad (1.4), an inner sleeve (1.5), a bearing (1.6), a shaft handle (1.7) and a lock ring (1.8); the working end of the retainer (1.3) has a conical structure, and the outer diameter of the working end gradually decreases in the direction indicated by the working end; the conical surface at the front end of the tool handle and the retainer (1.3) contain the roller (1.2), the retainer (1.3) is used for arranging a plurality of rollers (1.2), and when assembled, the nut (1.1) surrounds the roller (1.2), the retainer (1.3), the adjusting pad (1.4), the inner sleeve (1.5) and the bearing (1.6) and is connected with the shaft handle (1.7) to form an integral whole by means of the lock ring (1.8).

2. A process for rolling and strengthening the surface of an aircraft tubing joint as defined in claim 1, characterized in that, The front end of the retainer (1.3) is a solid conical structure, and a plurality of rollers (1.2) are uniformly arranged outside the conical structure of the retainer (1.3).

3. A process for tumbling and hardening the surface of an aircraft tubing joint as defined in claim 1, wherein, The front end of the retainer (1.3) is a hollow conical structure, and a plurality of rollers (1.2) are uniformly arranged inside the hollow conical structure of the retainer (1.3).

4. A process for tumbling and hardening the surface of an aircraft tubing joint as defined in claim 1 wherein, The tooling (2) comprises: A first clamping plate and a second clamping plate which are the same in structure and size, the first clamping plate is located on a fixed seat (2.2) and keeps still, the second clamping plate is located on a movable seat (2.12), a pneumatic cylinder (2.7) is arranged on the movable seat (2.12), and the movable seat (2.12) is provided with a sliding rail (2.8) below; under the action of the pneumatic cylinder (2.7), the movable seat (2.12) can drive the second clamping plate to slide on the sliding rail (2.8); The fixed seat (2.2) and the sliding rail (2.8) are located on a guide rail plate (2.3); a top die plate (2.4) is fixedly connected below the guide rail plate (2.3), the top die plate (2.4) and a bottom die plate (2.6) are fixedly connected through guide columns (2.5), and a space formed between the top die plate (2.4) and the bottom die plate (2.6) is fixedly provided with a pressure sensor (2.9), a mandrel (2.10) and a spring (2.11).

5. A process for rolling and strengthening the surface of an aircraft tubing joint as defined in claim 4, wherein During the rolling strengthening process, the pressure sensor (2.9) obtains the force applied by the rolling tool (1) to the sealing conical surface of the pipeline joint. The numerical control equipment controls the rolling intensity of the rolling cutter (1) according to the intensity acquired by the pressure sensor (2.9).

6. A process for roll strengthening the surface of an aircraft tubing joint as defined in claim 1 wherein, The main shaft is driven by a servo motor.

7. A process for tumbling and hardening the surface of an aircraft tubing joint as defined in claim 1 wherein, After the rolling strengthening is finished, the main shaft drives the rolling cutter (1) to retreat to the initial position, and the aviation pipeline joint (3) is released.

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