CN114769675A - Hole making device and hole making method - Google Patents

Abstract

The hole making device comprises a fixing sleeve, the fixing sleeve is of a hollow cylinder structure and comprises a first part and a second part, the diameter of the outer ring of the first part is larger than that of the outer ring of the second part, the hollow cylinder of the first part is used for accommodating an air drill chuck, and the hollow cylinder of the second part is used for accommodating a cutter; the elastic part is sleeved on the outer side of the second part, the blocking cover is arranged on the outer side of the elastic part, the blocking cover is of a hollow cylinder structure, a space is reserved between the blocking cover and the elastic part, one end of the blocking cover is fixedly connected with the first part, a guide sleeve is arranged between the other end of the blocking cover and the second part, the guide sleeve abuts against the elastic part and can slide along the second part, one side, away from the elastic part, of the guide sleeve is connected with a drill bushing, and when the guide sleeve compresses the elastic part to slide, the cutter can extend out of the drill bushing. Through the processing scheme, the hole making quality and the working range of the part are improved, and the operation convenience and the working efficiency are improved.

Description

Hole making device and hole making method

Technical Field

The application relates to the technical field of aeroengine manufacturing, in particular to a hole making device and a hole making method.

Background

A large amount of hole making work is involved in the reverse thrust assembly process of a certain type, and the assembly of the reverse thrust device is carried out on an assembly type frame. The common machining equipment cannot be used, and only the hole can be drilled in a manual machining mode by using an air drill. Because thrust reverser's structural feature is mostly sheet metal component and combined material, is structural mostly the space curved surface structure, and the openness is not good, and the instrument reachability is poor, and the unable bushing plate that designs in most drilling position can only rely on operating personnel to observe the straightness that hangs down on drilling and part surface during drilling, and the operation degree of difficulty is great, and is higher to operating personnel's skill degree of dependence. Moreover, the holes processed by the method are easy to deflect, low in quality, unstable in quality and poor in appearance consistency.

The drilling and riveting quality is not high, so that the reworking and the repair of the reverse thrust device are caused, the production efficiency is reduced, the manufacturing cost is improved, and the delivery and acceptance of the reverse thrust device are also influenced. Meanwhile, irreversibility of hole making and pit making leads to poor reworkability of reverse thrust, which brings about technical difficulties. On the other hand, the drilling and riveting quality of the thrust reverser has great influence on the performance, service life and safety of the thrust reverser.

Similar processes exist in the field of aircraft manufacturing in China, and a drill bushing is discovered through research and can improve the perpendicularity of hole manufacturing to a certain extent, but the drill bushing has great limitations in the using process and mainly has two points: firstly, need two people's cooperations in the operation process just can accomplish the operation, the operation is inconvenient, secondly can't use this drill bushing in narrow and small space. Therefore, the drilling device in the prior art cannot be effectively applied to the assembly of the thrust reverser of the aero-engine.

Disclosure of Invention

In view of the above, embodiments of the present invention provide a hole forming apparatus and a hole forming method, which can drill holes in a narrow space and a position with poor openness, and can improve the quality of the drilled holes by preventing the drilled holes from being perpendicular to the surface of the part.

In a first aspect, an embodiment of the present application provides a hole forming device, which is sleeved outside an air drill chuck, the air drill chuck is connected with a cutter, the hole forming device includes a fixing sleeve, the fixing sleeve is of a hollow cylinder structure, and includes a first portion and a second portion, the outer ring diameter of the first portion is greater than that of the second portion, the hollow cylinder of the first portion is used for accommodating the air drill chuck, and the hollow cylinder of the second portion is used for accommodating the cutter;

the outer side of the second part is sleeved with an elastic part, the outer side of the elastic part is provided with a blocking cover, the blocking cover is of a hollow cylinder structure, a space is reserved between the blocking cover and the elastic part, one end of the blocking cover is fixedly connected with the first part, a guide sleeve is arranged between the other end of the blocking cover and the second part, the guide sleeve abuts against the elastic part and can slide along the second part, one side, far away from the elastic part, of the guide sleeve is connected with a drill bush, and when the guide sleeve compresses the elastic part to slide, a cutter can stretch out the drill bush.

According to a concrete implementation mode of the embodiment of the application, the blocking cover is close to one end of the first position is provided with a hanging lug, and the hanging lug is fixedly connected with the first position through a fixing piece.

According to a concrete implementation mode of this application embodiment, be equipped with the trompil on the guide pin bushing, be equipped with the locating part in the trompil, the locating part with the second position is connected, works as when the guide pin bushing slides, it is right to carry out spacingly through the locating part the guide pin bushing.

According to a specific implementation manner of the embodiment of the application, the limiting member is provided as a limiting pin.

According to a specific implementation manner of the embodiment of the application, a through hole for the cutter to pass through is formed in the center of the drill bushing, and a chip removal hole is formed in the front end face of the drill bushing.

According to a specific implementation manner of the embodiment of the application, the drill bushing and the cutter are in clearance fit.

According to a specific implementation manner of the embodiment of the application, the guide sleeve is connected with the drill bushing through a screw.

According to a specific implementation manner of the embodiment of the application, the elastic member is provided as a spring.

In a second aspect, an embodiment of the present application further provides a hole forming method, which uses the hole forming apparatus according to any embodiment of the first aspect to form a hole, the method including:

mounting the hole making device on the air drill chuck;

pressing the guide sleeve to expose the cutter to the position of the alignment hole;

adjusting the drill bushing to ensure that the drill bushing is attached to the surface of the part to be drilled and the perpendicularity of the manufactured hole is ensured;

the hole is initially made and pressure is applied to the pneumatic drill handle to overcome the resistance to tool feed and the resistance to compression of the resilient member of the hole making device.

Advantageous effects

According to the hole making device and the hole making method in the embodiment of the application, the slidable guide sleeve is arranged and matched with the drill sleeve, so that holes can be made in parts with poor openness, such as narrow spaces of reverse thrust parts, and the working range is enlarged; the hole making device can ensure that the hole made is vertical to the surface of a part when manual drilling and reaming are carried out, the hole making quality of the part is improved, and the chip removal effect can be improved as the chip removal hole is arranged at the front end of the drill bushing.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a block diagram of a hole making apparatus according to an embodiment of the present invention;

fig. 2 is a structural view of a fixing cover according to an embodiment of the present invention;

FIG. 3 is a block diagram of a guide sleeve according to an embodiment of the present invention;

fig. 4 is a block diagram of a closure according to an embodiment of the present invention;

FIG. 5 is a block diagram of a drill sleeve according to an embodiment of the present invention;

fig. 6 is a structural diagram of a stopper pin according to an embodiment of the present invention.

In the figure: 1. fixing a sleeve; 101. a first region; 102. a second region; 103. a limit pin hole; 104. a first threaded hole; 105. a second threaded hole; 2. blocking the cover; 3. a guide sleeve; 301. opening a hole; 4. drilling a sleeve; 5. a spacing pin; 6. a spring; 7. a first screw; 8. a second screw; 9. a third screw; 10. a cutter; 11. a pneumatic drill chuck.

Detailed Description

The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The application is capable of other and different embodiments and its several details are capable of modifications and various changes in detail without departing from the spirit of the application. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present application, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.

It should be further noted that the drawings provided in the following embodiments are only schematic illustrations of the basic concepts of the present application, and the drawings only show the components related to the present application rather than the numbers, shapes and dimensions of the components in actual implementation, and the types, the numbers and the proportions of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.

In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.

The embodiment of the application provides a hole making device, which is used for solving the problem that a hole making device in the prior art cannot be effectively applied to the assembly of a thrust reverser of an aero-engine, and the hole making device is described in detail with reference to fig. 1 to 6.

The hole making device of the embodiment is used for being sleeved on the outer side of a pneumatic drill chuck 11, the pneumatic drill chuck 11 is connected with a cutter 10, and referring to fig. 1 and fig. 2, the hole making device comprises a fixed sleeve 1, a blocking cover 2, a guide sleeve 3, a drill sleeve 4 (designed into various specifications according to the size of a hole and provided with interchangeability), a limiting pin 5, an elastic piece and other components. Specifically, fixed cover 1 is hollow cylinder structure, including first position 101 and second position 102, the outer lane diameter of first position 101 is greater than the outer lane diameter of second position 102, the hollow cylinder of first position 101 is used for holding pneumatic drill dop 11, and the open end cover of first position 101 is on pneumatic drill dop 11 promptly, is equipped with second screw hole 105 on the first position 101, realizes fixed cover 1 and pneumatic drill dop 11's fixed through the cooperation of second screw 8 and second screw hole 105, the hollow cylinder of second position 102 is used for holding cutter 10.

The outer side of the second part 102 is sleeved with an elastic part, the outer side of the elastic part is provided with a blocking cover 2, the blocking cover 2 is of a hollow cylinder structure and is spaced from the elastic part, one end of the blocking cover 2 is fixedly connected with the first part 101, a guide sleeve 3 is arranged between the other end of the blocking cover 2 and the second part 102, the guide sleeve 3 abuts against the elastic part and can slide along the second part 102, one side, far away from the elastic part, of the guide sleeve 3 is connected with a drill bush 4, when the guide sleeve 3 compresses the elastic part to slide, the cutter 10 can extend out of the drill bush 4, and the drill bush 4 is in clearance fit with the cutter 10. In this embodiment, the elastic member is a spring 6, and the guide sleeve 3 can slide back and forth by compressing and restoring the spring 6.

The hole making device of the embodiment is mainly used for manual hole making work of sheet metal part parts such as a reverse thrust device and is suitable for parts which are narrow in space and inconvenient to operate. By selecting drill bushings of different specifications and sizes, hole machining work of various sizes can be performed, the hole machining mainly comprises drilling and reaming, and therefore the cutter 10 is generally a drill bit or a reamer.

In an embodiment, referring to fig. 4, one end of the blocking cover 2 close to the first portion 101 is provided with a hanging lug, the hanging lug is provided with a through hole, the hanging lug is fixedly connected with the first portion 101 through a fixing member to realize the fixed connection of the blocking cover 2, the fixing member can be a screw or the like, for example, the first screw 7 in fig. 1 is provided with a through hole on the hanging lug, the position corresponding to the first portion 101 is provided with a first threaded hole 104, the first screw 7 penetrates through the through hole to be in threaded connection with the first threaded hole 104, so as to realize the connection between the blocking cover 2 and the first portion 101, that is, the blocking cover 2 is fixed on the fixing sleeve 1.

In order to realize the limiting function of the guide sleeve 3, an opening 301 is formed in the guide sleeve 3, referring to fig. 3, a limiting member is arranged in the opening 301, the limiting member is connected with the second portion 102, and when the guide sleeve slides, the guide sleeve is limited by the limiting member. Preferably, the limiting member is a limiting pin 5, and referring to fig. 6, the structure of the limiting pin 5, one end of the limiting pin 5 is located in the opening 301, the other end of the limiting pin 5 is located in the limiting pin hole 103 on the second portion 102, and the limiting function when the guide sleeve 3 slides is realized by the blocking effect of the limiting pin 5 in the opening 301, so that the guide sleeve 3 is prevented from falling off.

In order to improve the chip removal effect during drilling, a chip removal hole is formed in the drill bushing 4, referring to fig. 5, a through hole for allowing a cutter to pass through is formed in the center of the drill bushing 4, and the chip removal hole is formed in the front end face of the drill bushing 4.

In one embodiment, the guide sleeve 3 is connected with the drill sleeve 4 through a screw, referring to a third screw 9 in fig. 1, the guide sleeve 3 is fixedly connected with the drill sleeve 4 through the third screw 9, and the guide sleeve 3 drives the drill sleeve 4 to move when sliding, so that the cutter 10 is exposed and hidden.

When holes are actually required to be drilled, firstly, a proper drill bit or reamer (the cutter 10 in the attached drawing) is selected, the diameter size and the length of the cutter 10 are mainly considered during selection, and the length of the cutter 10 is required to ensure that the tool tip does not expose out of the drill bushing 4 after the cutter is installed with a pneumatic drill and a drilling device. Various special tools 10 can be designed according to the production yield requirement. The selected tool 10 is then mounted on the pneumatic drill chuck 11 and secured. And then according to the diameter of the selected cutter 10, selecting a proper drill bushing 4, wherein the fit between the drill bushing 4 and the cutter 10 is clearance fit. The drill bushing 4 is mounted on the guide bushing 3 of the hole making device, and the third screw 9 is tightened to fix the drill bushing 4 on the guide bushing 3 of the hole making device. And (3) mounting the hole making device on the pneumatic drill, and tightening the second screw 8 to fix the hole making device and the pneumatic drill. The installation condition is checked, whether the length of the cutter 10 is proper or not is mainly checked, the guide sleeve 3 is pressed by hands, the guide sleeve 3 can freely slide on the fixed sleeve 1, the cutter 10 can freely slide out, and the phenomenon of clamping is avoided. If the card is available, the card can be removed and reinstalled. After the above work is completed, the hole making work can be performed.

In a second aspect, the present application further provides a hole-making method, which uses the hole-making apparatus according to any embodiment of the first aspect to make a hole, the method including:

s1, mounting the hole making device on the pneumatic drill chuck 11;

s2, pressing the guide sleeve 3 to expose the tool tip of the tool 10 so as to align the position of the hole to the tool;

s3, loosening the guide sleeve 3, and adjusting the drill sleeve 4 to ensure that the drill sleeve 4 is attached to the surface of the part to be drilled, thereby ensuring the verticality of the drilled hole. During specific operation, the front end face of the drill bushing 4 is attached to the surface of the part within the maximum range, and then vertical alignment is completed.

And S4, starting the pneumatic drill trigger to drill or ream and start hole making, wherein a certain pressure is required to be applied to the pneumatic drill handle to overcome the cutter feeding resistance and the compressed resistance of the elastic piece of the hole making device. In the whole hole making process, the fit between the end face of the drill bushing and the surface of the part to be drilled is always ensured, and the perpendicularity of the made hole can be ensured.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (9)

1. A hole making device is sleeved on the outer side of an air drill chuck, and the air drill chuck is connected with a cutter;

the outer side of the second position is sleeved with an elastic piece, a blocking cover is arranged on the outer side of the elastic piece, the blocking cover is of a hollow cylinder structure and is spaced from the elastic piece, one end of the blocking cover is fixedly connected with the first position, a guide sleeve is arranged between the other end of the blocking cover and the second position, the guide sleeve abuts against the elastic piece and can slide along the second position, one side, far away from the elastic piece, of the guide sleeve is connected with a drill bushing, and when the guide sleeve compresses the elastic piece to slide, the cutter can stretch out the drill bushing.

2. The hole making device of claim 1, wherein an end of said closure proximate to said first portion is provided with a hanger, said hanger being fixedly attached to said first portion by a fastener.

3. The hole making device according to claim 1, wherein an opening is provided in the guide sleeve, a stopper is provided in the opening, the stopper is connected to the second portion, and the guide sleeve is stopped by the stopper when the guide sleeve slides.

4. A hole making device as claimed in claim 3, wherein the retaining member is provided as a retaining pin.

5. The hole making device according to claim 1, wherein a through hole for a cutter to pass through is formed in a central portion of the drill bushing, and a chip removal hole is formed in a front end face of the drill bushing.

6. A hole making device as claimed in claim 1, wherein there is a clearance fit between the drill sleeve and the cutter.

7. A hole making device as claimed in claim 1, wherein the guide sleeve is screwed to the drill sleeve.

8. A hole making device according to any of claims 1-7, wherein the resilient member is provided as a spring.

9. A method of making a hole using the hole making apparatus of any one of claims 1 to 8, the method comprising:

mounting a hole making device on the air drill chuck;

the guide sleeve is pressed tightly, so that the cutter is exposed out of the position for finding the hole;

adjusting the drill bushing to ensure that the drill bushing is attached to the surface of the part to be drilled and the perpendicularity of the manufactured hole is ensured;

the hole is initially made and pressure is applied to the pneumatic drill handle to overcome the resistance to tool feed and the resistance to compression of the resilient member of the hole making device.

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