CN114871914B - Self-adaptive polishing method and device for aerospace pipe fitting - Google Patents

Abstract

The invention relates to a self-adaptive polishing method and a device for aerospace pipe fittings, wherein a plurality of rollers are used for supporting annular polishing belts, one roller actively moves to push the polishing belt to the pipe fitting, the surface of the pipe fitting is coated, an included angle formed by the polishing belt and two ends contacted with the pipe fitting is more than or equal to 180 degrees, the other roller passively moves when the polishing belt moves, so that the polishing belt is kept taut, after polishing is finished, the roller is reset, the polishing belt is kept taut, and the other roller actively rotates to drive the polishing belt to rotate, so that one side of the pipe fitting is polished, and then the other side of the pipe fitting can be polished after the pipe fitting is turned over. The invention meets the applicability effect of more complex pipe fittings and pipe fittings with more specifications, and can realize automatic polishing of various pipe fittings through digital control.

Description

A self-adaptive grinding method and device for aerospace pipe fittings

technical field

The invention relates to the field of aerospace technology, and more specifically relates to an adaptive grinding method and device for aerospace pipe fittings.

Background technique

There are tens of thousands of accessories on aerospace vehicles such as airplanes and rockets, and many accessories are connected by metal pipes. For example, there are many metal conduits on the rocket body and engine, which are used to transmit various fluids and support the rocket. It is an extremely important part of the rocket for various tasks of flight. "Rocket Propulsion/Journal of Rocket Propulsion" 2018 Issue 03 "Liquid Rocket Engine Piping Fracture Failure Analysis and Power Optimization" explains that: the safety and reliability of the liquid rocket engine piping system has become the key to whether the engine can work safely key.

In order to meet the requirements of the overall layout, the pipe fittings used in aerospace are usually designed in various shapes. Therefore, the processing of pipe fittings used in aerospace has the characteristics of a wide variety of pipe fittings and diverse shapes of pipe fittings. At the same time, there are small batches and multi-standard pipe fittings. Production task; as an important process in the pipe fittings processing process, end grinding plays a role in improving the surface quality of pipe fittings ends, and the pipe fittings end grinding equipment also needs to adapt to the operation in the automatic processing of its related production lines.

Since the product contains many types of pipe fittings, such as round pipes, square pipes, oval pipes, etc., and the applicable type of equipment for grinding is single, multiple special equipment are used for different types of end grinding, and the operator Sending the pipe fittings to be polished into matching equipment for grinding treatment increases the workload of the operator; secondly, in production and application, due to the existence of such drawbacks, it cannot be well applied to the conditions of automatic processing in the production line, and there is often a problem In the case of multiple machines being idle, the waste of space is not conducive to the reasonable layout of the production line.

Contents of the invention

In order to solve the above technical problems, the first object of the present invention is to provide an adaptive grinding method for aerospace pipe fittings, which can wrap and grind the ends of pipe fittings of various types and specifications. A second object of the present invention is to provide an adaptive grinding device for aerospace pipes.

In order to realize above-mentioned first invention object, the present invention adopts following technical scheme:

An adaptive grinding method for aerospace pipe fittings, using multiple rollers to support a ring-shaped grinding belt, one of the rollers actively moves to push the grinding belt to the pipe fittings, and covers the surface of the pipe fittings, grinding the belt and pipe fittings The angle formed by the two ends of the contact is greater than or equal to 180°, and the other roller moves passively when the grinding belt is moving, so that the grinding belt remains tight, and after the grinding is completed, the roller resets to keep the grinding belt still tight, and There is a roller that actively rotates to drive the grinding belt to rotate to complete the grinding on one side of the pipe fitting, and then turn the pipe fitting over to complete the grinding on the other side of the pipe fitting.

As a preferred solution: the plurality of rollers are all arranged on the polishing mounting plate, including a driving wheel, a driven wheel B, a driven wheel A, a runner A, and a runner B, and the driving wheel is used to drive the grinding belt to rotate; The runner A is driven to move by a pressing mechanism arranged on the polishing mounting plate, and the runner B keeps the polishing belt in a tight state all the time through a tensioning mechanism arranged on the polishing mounting plate.

As a preferred solution: the pressing mechanism includes a pressing arm shaft and a pressing driving cylinder, and a rotating shaft B runs through the polished mounting plate. One end of the rotating shaft B is fixed to press the rotating arm shaft, and the other end is fixed to The movable connecting rod, the pressing driving cylinder pushes the movable connecting rod to rotate with the rotating shaft B as the center of a circle, so that the pressing arm shaft also rotates correspondingly, and the runner A is arranged at the outer end of the pressing arm shaft .

As a preferred solution: the shaft of the pressing arm is arc-shaped, and the outer end of the shaft of the pressing arm is provided with two runners A at intervals.

As a preferred solution: the polishing mounting plate is provided with a grinding hole, and the compression arm shaft is pressed down so that the grinding hole is located in the notch of the compression arm shaft.

As a preferred solution: the tensioning mechanism includes a tensioning arm shaft, a tension spring and a spring seat, and the polished mounting plate is provided with a rotating shaft A, one end of the rotating shaft A is fixed to the tensioning arm shaft, and the other end Fix the connecting rod, the spring seat is fixed on the polishing mounting plate, the tension spring connects the spring seat and the connecting rod, the tension spring moves the tensioning arm axially outside the grinding belt through the connecting rod, and then the grinding belt is tightened, When the pressing unit drives the grinding belt, the tensioning arm shaft will overcome the force of the extension spring and move inward, and the end of the tensioning arm shaft is provided with a runner B.

As a preferred solution: the tensioning arm shaft is L-shaped, and the tensioning arm shaft rotates downward so that the driven wheel A is located at the bend of the tensioning arm shaft.

As a preferred solution: the polishing mounting plate is provided with a connecting shaft through bearing rotation, the driving wheel is fixed on one end of the connecting shaft, the other end of the connecting shaft is fixed with a driving motor wheel, and the driving motor wheel is connected with a grinding wheel through a transmission belt. Belt drive motor.

As a preferred solution: the grinding device also includes a dustproof cover, the dustproof cover includes a first shell and a second shell, the two shells are hinged by a hinge, and a Has a lock.

In order to realize above-mentioned second invention object, the present invention adopts following technical scheme:

An adaptive grinding device for aerospace pipe fittings, the device is used to implement any one of the grinding methods described above.

Compared with prior art, the beneficial effect of the present invention is:

The invention adopts the structure of the movable roller and the grinding belt, drives the grinding belt to cover the end of the pipe fittings, and completes the grinding of the pipe fittings through the drive of the driving wheel; Stay tense.

The invention can realize the automatic grinding of various pipe fittings through digital control, improve the utilization rate of its equipment in the processing of the pipe fitting production line and the utilization rate of the production line site; through the use of self-adaptive grinding device, it can achieve more complex pipe fittings and more specifications The applicability effect of the pipe fittings meets the requirements of pipe fittings processing in the aerospace field.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application and not to limit the present application.

Fig. 1 is the overall structure schematic diagram of the grinding device that the method of the present invention adopts;

Fig. 2 is the rear view three-dimensional structural schematic diagram of the grinding device adopted in the method of the present invention after the dustproof shield is removed;

Fig. 3 is the front-view three-dimensional structure schematic diagram of the grinding device adopted in the method of the present invention after the dustproof shield is removed;

Fig. 4 is the schematic diagram of the rear structure of the polishing device adopted in the method of the present invention after the dustproof shield is removed;

Fig. 5 is the three-dimensional structure diagram of the rear view in the grinding state after the grinding device used in the method of the present invention is removed from the dust shield;

Fig. 6 is a schematic diagram of the back structure of the grinding device used in the method of the present invention after removing the dust shield and grinding;

Fig. 7 is a schematic diagram of the front structure of the grinding device used in the method of the present invention in the grinding state after the dustproof cover is removed.

Detailed ways

It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

Furthermore, in describing the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front" , "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. Based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood To limit the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

An adaptive grinding method for aerospace pipe fittings, using a plurality of rollers to support an annular grinding belt 26, one of which actively moves the grinding belt 26 to the pipe fitting 5, and coats the surface of the pipe fitting 5, The angle formed by the two ends of the polishing belt 26 in contact with the pipe fitting 5 is greater than or equal to 180°, and the other roller moves passively when the polishing belt 26 moves, so that the polishing belt 26 remains tight, and after the polishing is completed, the roller resets so that Grinding belt 26 still keeps tight, and a roller actively rotates to drive grinding belt 26 to rotate, completes the grinding of pipe fitting 5 one side, then pipe fitting 5 turns over and just can finish polishing to the other side of pipe fitting.

Fig. 1 to Fig. 7 is the specific structure of the device adopted in a kind of adaptive grinding method for aerospace pipe fittings according to the present invention, and the device comprises a polishing mounting plate 21, a grinding belt 26, a driving wheel 211, a Tightening mechanism and pressing mechanism, described polishing mounting plate 21 is vertically fixed on the frame, and described driving wheel, driven wheel are distributed on polishing mounting plate 21, and described polishing belt 26 is supported by driving wheel, driven wheel , and the sanding belt is tightened by a tensioning mechanism, and the pressing mechanism presses the sanding belt against the pipe fitting 5 .

The tensioning mechanism is arranged on the top of the polishing mounting plate 21, and includes a tensioning arm shaft 24 and a spring seat 27. The tensioning arm shaft 24 is L-shaped, and the tensioning arm shaft 24 rotates downward so that The driven wheel A213 is located at the bend of the tensioning arm shaft 24 . One end of the tensioning arm shaft 24 is fixed to one end of the rotating shaft A that runs through the polishing mounting plate 21 and is rotated. The other end of the rotating shaft A is fixed with a connecting rod 29, and the spring seat 27 is fixed on the polishing mounting plate. 21, and a tension spring 28 is provided between the spring seat 27 and the connecting rod 29, and the other end of the tensioning arm shaft 24 is provided with a runner B241.

The pressing mechanism is arranged at the middle part of the polishing mounting plate 21, and comprises a pressing arm shaft 23 and a pressing driving cylinder 25, and one end of the pressing arm shaft 23 is connected with the rotating arm shaft 21 that runs through the polishing mounting plate 21. One end of the rotating shaft B is fixed, and the other end of the rotating shaft B is fixed with a movable connecting rod 232. The pressing driving cylinder 25 is hinged on the polishing mounting plate 21, and the piston rod of the pressing driving cylinder 25 is hinged to the movable connecting rod 232. , There is at least one runner A231 on the other end of the pressing arm shaft 23, and preferably, two runners A231 are arranged at intervals on the other end of the pressing arm shaft 23.

A driven wheel A213 is also provided between the tensioning mechanism and the pressing mechanism, the driving wheel 211 is arranged on the bottom of the polishing mounting plate 21, and the driven wheel B212 is arranged obliquely above the driving wheel 211, and the grinding belt 26 is ring-shaped, and is jointly supported by driven wheel A213, runner A231, driven wheel B212, driving wheel 211 and runner B241; described pressing arm shaft 23 is arc-shaped, and described pressing driving cylinder 25 pushes and presses Tighten the rotating arm shaft 23 to rotate, wrap the polishing belt 26 between the runner A231 and the driven wheel B212 on the pipe fitting 5, the polishing mounting plate 21 is provided with a connecting shaft through bearing rotation, and the driving wheel 211 is fixed on One end of the connecting shaft, the other end of the connecting shaft is fixed with the driving motor wheel 214, and the grinding belt driving motor is connected with the driving motor wheel 214 by the transmission belt, and drives the driving motor wheel 214 to rotate; the driving wheel 211 is synchronous with the driving motor wheel 214 Rotate, and then drive the grinding belt 26 to rotate to grind the pipe fitting 5.

When the pipe fittings are clamped reliably, the compression drive cylinder drives the movable connecting rod to rotate, so that the runner A231 on the compression arm shaft pushes the grinding belt to cover the end of the pipe fittings, and the grinding belt is driven by the driving wheel to complete the fitting of the pipe fittings. Grinding; after the grinding was completed, the compression drive cylinder was retracted to the original position, and the connecting rod was pulled by the pulling force of the extension spring to drive the compression rotating arm shaft 23 to reset, and the grinding belt was propped to the tensioned state.

The above-mentioned structural layout can make the grinding belt more closely contact with the pipe fittings. At the same time, the pressing arm shaft 23 is designed to be arc-shaped, C-shaped or U-shaped, so that as much pipe fittings as possible can be moved when the pressing arm shaft 23 pushes the grinding belt. Surface coating is beneficial to reduce the number of grinding times and improve grinding efficiency. The pressing arm shaft 23 of the above-mentioned shape makes the angle formed by the two ends of the grinding belt in contact with the pipe fitting be greater than or equal to 180° after rotation, so that only the pipe fitting needs to be turned over during operation like this to complete all the pipe fitting grinding, saving Save time and effort. In addition, two runners are arranged at the end so that the grinding belt can still maintain no interference with each other after being bent, and the operation is stable, avoiding the transitional loss of the belt.

The above structure drives the movable tensioning roller structure by the cylinder and cooperates with the flexibility of the grinding belt to realize the wrapping and grinding of the ends of pipe fittings of various types and specifications to improve the applicability; the use of this device can guarantee the grinding of the ends of various types of pipe fittings The use of flexibility and adaptability in automatic processing improves production efficiency.

In order to meet the end grinding of the specific length of the pipe fitting, the polishing mounting plate 21 is also provided with a grinding hole 22. , the pipe fittings can pass through the grinding hole 22, and simultaneously, when the pressing arm shaft 23 is pressed down, the grinding hole 22 is also just in place in the notch of the pressing arm shaft 23.

In order to make the grinding device run more stably and with higher safety, the grinding device 2 also includes a dustproof cover 20, as shown in Figure 1, the dustproof cover 20 includes a first housing and a second housing , the two housings are hinged by a hinge 201, and a lock 202 is also provided between the two housings. The first housing is fixed to one side of the polishing mounting plate 21 by bolts, and the second housing is provided with an opening on the back, and the size and shape of the opening is the same as that of the polishing mounting plate 21 . A through hole is also opened on the dustproof cover 20 at a position corresponding to the grinding hole 22 . During maintenance, as long as the lock between the two housings is opened, the second housing can be turned over to repair and replace the components on the polished mounting plate 21 .

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be construed as limitations to the present invention. Under the circumstances, within the scope of the present invention, the above embodiments can be changed, modified, replaced and modified. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still belong to the present invention. within the scope of the technical program.

Claims (8)

1. An adaptive grinding method for aerospace pipe fittings, characterized in that: a plurality of rollers are used to support an annular grinding belt (26), and one of the rollers actively moves the grinding belt (26) to the pipe fitting (5) place, and the surface of the pipe fitting (5) is coated, the angle formed by the two ends of the grinding belt (26) in contact with the pipe fitting (5) is greater than or equal to 180°, and the other roller is passive when the grinding belt (26) moves movement, so that the grinding belt (26) remains taut, and after the grinding is completed, the roller resets so that the grinding belt (26) remains tight, and a roller actively rotates to drive the grinding belt (26) to rotate, completing the alignment of the pipe fittings ( 5) Grinding on one side, and then turning the pipe fitting (5) over to complete the grinding on the other side of the pipe fitting; The plurality of rollers are all arranged on the polishing mounting plate (21), including driving wheel (211), driven wheel B (212), driven wheel A (213), runner A (231), runner B (241 ), the driving wheel (211) is used to drive the grinding belt (26) to rotate; the runner A (231) is driven by a pressing mechanism arranged on the polishing mounting plate (21), and the runner B (241) keep the polishing belt (26) in a tight state all the time by the tension mechanism arranged on the polishing mounting plate (21); The pressing mechanism includes a pressing arm shaft (23) and a pressing driving cylinder (25). A rotating shaft B runs through the polished mounting plate (21), and one end of the rotating shaft B is fixed to the pressing arm. shaft (23), the other end of which is a fixed movable link (232), and the compressing drive cylinder (25) pushes the movable link (232) to rotate with the rotating shaft B as the center of the circle, so that the compressing arm shaft (23) also Correspondingly rotate, the runner A (231) is arranged on the outer end of the pressing arm shaft (23). 2. A kind of self-adaptive grinding method for aerospace pipe fittings according to claim 1, is characterized in that: described pressing arm shaft (23) is arc-shaped, and compressing arm shaft (23) The outer end is provided with two runners A (231) at intervals. 3. A kind of self-adaptive grinding method for aerospace pipe fittings according to claim 1, it is characterized in that: described polishing mounting plate (21) is provided with grinding hole (22), and described pressing arm Axle (23) presses down and makes grinding hole (22) be positioned at the notch that compresses pivot arm axle (23). 4. A kind of adaptive grinding method for aerospace pipe fittings according to claim 1, is characterized in that: described tensioning mechanism comprises tensioning arm shaft (24), extension spring and spring seat (27), The polished mounting plate (21) is provided with a rotating shaft A, one end of the rotating shaft A is fixed to the tensioning arm shaft (24), the other end is fixed to the connecting rod (29), and the spring seat (27) is fixed on On the polishing mounting plate (21), the extension spring (28) connects the spring seat (27) and the connecting rod (29), and the extension spring (28) makes the tensioning arm shaft (24) to the grinding belt through the connecting rod (29). (26) moves outward, and then the grinding belt (26) is just tightened, and when the pressing unit drives the grinding belt (26), the tensioning arm shaft (24) can overcome the force of the extension spring (28) and move inwardly, A runner B (241) is provided at the end of the tensioning arm shaft (24). 5. A method for adaptive grinding of aerospace pipes according to claim 4, characterized in that: the tensioning arm shaft (24) is L-shaped, and the tensioning arm shaft (24) faces Turn down so that the driven wheel A (213) is located at the bend of the tensioning arm shaft (24). 6. A kind of self-adaptive grinding method for aerospace pipe fittings according to claim 1, it is characterized in that: described polishing mounting plate (21) is provided with connecting shaft through bearing rotation, and described driving wheel (211 ) is fixed on an end of the connecting shaft, and the other end of the connecting shaft is fixed with a driving motor wheel (214), and the driving motor wheel (214) is connected with a grinding belt drive motor (33) by a transmission belt (37). 7. A kind of adaptive grinding method for aerospace pipe fittings according to claim 1, is characterized in that: described grinding device (2) also comprises dustproof shield (20), and described dustproof shield ( 20) It includes a first shell and a second shell, the two shells are hinged by a hinge (201), and a lock (202) is also provided between the two shells. 8. An adaptive grinding device for aerospace pipe fittings, characterized in that the device is used to implement the grinding method described in any one of claims 1 to 7.

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