Auxiliary device for inclined threaded hole matched with drilling hole

Abstract

The invention belongs to the technical field of drilling auxiliary devices, and discloses an inclined threaded hole drilling auxiliary device which comprises a machine tool platform, a universal radial drilling machine and a drill bushing, the machine tool platform is provided with a cross beam assembly, the cross beam assembly comprises four cross beams, the four cross beams form a cross shape, and scale marks are arranged on the cross beams; a screw rod is arranged in the center of the cross beam assembly and detachably connected with a first pressing assembly. The cross beam is slidably connected with a roller assembly, the roller assembly comprises a connecting frame, the connecting frame is rotatably connected with an inner-diameter roller and a plane roller, the axis of the inner-diameter roller is perpendicular to the machine tool platform, and the axis of the plane roller extends in the length direction of the cross beam; the machine tool platform is detachably connected with a roller pressing plate assembly; the machine tool platform is detachably connected with a second pressing assembly used for fixing the shell. The problems that according to an existing drilling machining technology for the inclined threaded hole of the metal shell, the metal shell slides easily, and the drilling position and angle precision is low are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drilling auxiliary devices, in particular to a drilling auxiliary device for inclined threaded holes. BACKGROUND

[0002] In the field of aerospace, metal shells are core structural components of various aircraft and spacecraft, and the reliability and precision of their connections directly affect the operation safety and performance indicators of the whole machine. Due to the need to adapt to complex mechanical environments and spatial layouts in the structural design of aerospace equipment, the connection between multiple metal shells often adopts an inclined threaded connection method. This connection method can effectively disperse loads, reduce stress concentration, and at the same time meet the design requirements of lightweight and compactness.

[0003] To achieve inclined threaded connection between metal shells, inclined threaded holes that cooperate with each other need to be machined at predetermined positions on the shells. Generally, a first inclined threaded hole is drilled on one workpiece in advance, and a second inclined threaded hole that cooperates with the first one is drilled on another workpiece. The drilling precision of the second inclined threaded hole is the core prerequisite for ensuring the connection quality. Currently, the drilling of inclined threaded holes in metal shells in the prior art mainly uses manual line marking positioning combined with ordinary drilling machines or general numerical control drilling machines. However, manual line marking positioning combined with ordinary machine tools relies on the experience and skills of operators, which not only has low efficiency but also cannot guarantee the accuracy of angles and positions. In addition, since metal shells in the field of aerospace are mostly large thin-walled structures or special-shaped parts, the general clamps of numerical control drilling machines often cannot completely match the outer shape of the shells. During the drilling process, under the action of the feeding impact force and cutting force of the drill bit, the metal shell is prone to slipping, thereby affecting the connection quality. SUMMARY

[0004] The present application aims to provide an inclined threaded hole drilling auxiliary device that solves the problem of metal shell slipping and low drilling position and angle accuracy caused by the existing inclined threaded hole drilling technology of metal shells.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] The utility model provides a kind of auxiliary device of inclined thread hole drilling hole, including machine tool platform, universal rocker arm drilling machine and drill bushing, the machine tool platform is equipped with beam assembly, the beam assembly includes four cross beams, and the four cross beams form cross, and the cross beam is equipped with scale line;The center of the beam assembly is equipped with screw rod, the end of the screw rod away from the machine tool platform can be detachably connected with first pressing assembly;Four the cross beam is slidably connected with roller assembly, the roller assembly includes connecting frame, the connecting frame is rotatably connected with inner diameter roller and plane roller respectively, the axis of the inner diameter roller is perpendicular to the machine tool platform, and the axis of the plane roller extends along the length direction of the cross beam;The machine tool platform is detachably connected with roller pressure plate assembly, and the roller pressure plate assembly is used to limit the sliding of the connecting frame;The machine tool platform is detachably connected with the second pressing assembly for fixing shell.

[0007] Further, the beam assembly further includes a square mounting plate, the four sides of the mounting plate are provided with mounting grooves, one end of the beam is provided with a mounting notch matched with the mounting groove, and the beam is connected with the mounting plate through a fixing bolt.

[0008] Further, the beam is fixed on the machine tool platform through a beam pressure plate assembly, the beam pressure plate assembly includes a support, a beam pressure plate and a locking bolt, the beam pressure plate is slidably sleeved on the support, and the locking bolt passes through the beam pressure plate and is threadedly connected with the machine tool platform.

[0009] Further, the beam is provided with a "concave" shaped key groove, the connecting frame bottom is connected with a "convex" shaped flat key matched with the key groove, and the flat key is slidably connected in the key groove.

[0010] Further, the second pressing assembly includes a shell pad and a shell pressure plate, the shell pressure plate is above the shell pad, and the shell pressure plate and the shell pad have a clamping area for clamping the shell; the shell pressure plate is detachably connected with the machine tool platform through a locking bolt.

[0011] Further, the roller pressure plate assembly includes a roller pressure plate and a fastening bolt, one end of the roller pressure plate is detachably connected with the machine tool platform through the fastening bolt, and the other end of the roller pressure plate is provided with a wedge-shaped block to avoid interference with the rotation of the plane roller.

[0012] Further, the first pressing assembly includes a pressing plate, the pressing plate is slidably connected with the screw rod, and the screw rod is threadedly connected with a locking nut for fixing the pressing plate.

[0013] The principle and beneficial effects of the technical solution are as follows:

[0014] 1. The auxiliary device for drilling inclined threaded holes provided by the application comprises a machine tool platform, a crossbeam and a shell fixing assembly, a drill sleeve is installed in a first inclined threaded hole drilled in the first shell in advance, so that the drill bit of a universal radial drill extends into the drill sleeve and drills a second inclined threaded hole in the second shell, ensuring the accuracy of the drilling angle; the machine tool platform is provided with a crossbeam assembly, the crossbeam assembly comprises four crossbeams, and the four crossbeams form a cross shape, the crossbeam is provided with scale lines, so that the roller assembly can be adjusted to the corresponding scale position according to the inner diameter size of the end face of the second shell to be machined; a screw is arranged at the center of the crossbeam assembly, and a first pressing assembly is detachably connected to the end of the screw away from the machine tool platform, so as to fix the two shells together and avoid the shells from slipping during the work; the crossbeam is slidingly connected with a roller assembly, which can realize 360° rotation and center positioning of the second shell; specifically, the roller assembly comprises a connecting frame, the connecting frame is rotatably connected with an inner diameter roller and a plane roller respectively, the axis of the inner diameter roller is perpendicular to the machine tool platform, the inner diameter roller is attached to the inner diameter of the end face of the second shell, the axis of the plane roller extends along the length direction of the crossbeam, and the plane roller is attached to the end face of the second shell, so as to realize 360° rotation and center positioning of the shell; the machine tool platform is detachably connected with a roller pressing plate assembly, after the position of the second shell and the position of the roller assembly are adjusted according to the inner diameter of the second shell, the connecting frame is limited from sliding by the roller pressing plate assembly, and the end face of the second shell is pressed by the second pressing assembly, so as to further fix the second shell and avoid the second shell from slipping; the first pressing assembly, the second pressing assembly, the roller pressing plate assembly, the drill sleeve and the universal radial drill are used to avoid manual scribing, improve the efficiency and the accuracy of the angle and position; in addition, the first pressing assembly, the second pressing assembly and the roller pressing plate assembly can be completely attached to the contour of the second shell, so as to avoid the metal second shell from slipping during the drilling process, thereby affecting the connection quality.

[0015] 2. The auxiliary device for drilling inclined threaded holes provided by the application, the crossbeam assembly further comprises a square mounting plate, mounting grooves are formed in the four sides of the mounting plate, one end of the crossbeam is provided with a mounting notch matched with the mounting grooves, and the crossbeam is connected with the mounting plate through fixing bolts, so as to increase the stability of the connection and ensure the perpendicularity between the crossbeams. The crossbeam is fixed on the machine tool platform through a crossbeam pressing plate assembly, the crossbeam pressing plate assembly comprises a support, a crossbeam pressing plate and a locking bolt, so as to avoid the crossbeam from slipping and affecting the drilling accuracy, and the pressing force on the crossbeam can be adjusted through the cooperation of the bolt and the pressing plate.

[0016] 3. The oblique threaded hole drilling auxiliary device provided by the application has a "concave" key groove formed in the cross beam, a "convex" flat key matched with the key groove is connected to the bottom of the connecting frame, the flat key is slidingly connected in the key groove, can play a guiding role, ensures that the axis of the flat roller is always along the length direction of the cross beam, ensures the function of the rotation of the second shell, and can ensure the smoothness of sliding.

[0017] 4. The oblique threaded hole drilling auxiliary device provided by the application has a second pressing assembly including a shell pad and a shell pressing plate, the shell pressing plate is located above the shell pad, the pad abuts against the bottom of the end face of the second shell, the shell pressing plate abuts against the top of the end face of the second shell, can be closely combined with the contour of the second shell to fix the second shell, has high stability, and further avoids the sliding of the second shell. The roller pressing plate assembly includes a roller pressing plate and a fastening bolt, the other end of the roller pressing plate is provided with a wedge-shaped block to avoid interference with the rotation of the flat roller, the flat roller and the inner diameter roller are used to perform the center positioning of the shell to ensure the accuracy of drilling. The first pressing assembly includes a pressing plate and a locking nut, can align and fix the two shells, and the pressing plate can be combined with the end face of the shell to further increase the fixing property. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structure schematic view of the oblique threaded hole drilling auxiliary device provided by the application;

[0019] Figure 2 It is a structure schematic view of the oblique threaded hole drilling auxiliary device provided by the application; Figure 1 It is a structure schematic view of the oblique threaded hole drilling auxiliary device provided by the application;

[0020] Figure 3 It is a structure schematic view of the oblique threaded hole drilling auxiliary device provided by the application; Figure 1 It is a structure schematic view of the oblique threaded hole drilling auxiliary device provided by the application;

[0021] Figure 4 It is a structure schematic view of the oblique threaded hole drilling auxiliary device provided by the application; Figure 1 It is a structure schematic view of the oblique threaded hole drilling auxiliary device provided by the application;

[0022] Figure 5 It is a top view of the cross beam assembly of the oblique threaded hole drilling auxiliary device provided by the application;

[0023] Figure 6 It is an exploded structure schematic view of the cross beam assembly of the oblique threaded hole drilling auxiliary device provided by the application.

[0024] The names of corresponding marks in the drawings are:

[0025] 1. Machine tool platform; 2. Universal radial drilling machine; 3. Drill bushing; 4. First housing; 5. Second housing; 51. End face; 6. Crossbeam; 7. First oblique threaded hole; 8. Mounting plate; 9. Screw; 10. Pressure plate; 11. Locking nut; 12. Mounting groove; 13. Mounting notch; 14. Crossbeam pressure plate; 15. Support component; 16. Locking bolt; 17. Connecting frame; 18. Keyway; 19. Flat key; 20. Notch; 21. Flat roller; 22. Inner diameter roller; 23. Fastening bolt; 24. Roller pressure plate; 25. Housing pad; 26. Housing pressure plate. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0027] In related technologies, to achieve a herringbone threaded connection between metal housings, it is necessary to machine mutually mating herringbone threaded holes at predetermined positions on the housings. Generally, a herringbone threaded hole is pre-drilled on one housing, and then another mutually mating herringbone threaded hole is drilled on the other housing. The drilling accuracy of this herringbone threaded hole is a core prerequisite for ensuring the connection quality. Currently, existing technologies for drilling herringbone threaded holes in metal housings mainly employ manual scribing and positioning combined with machining on ordinary drilling machines or general-purpose CNC drilling machines. However, manual scribing and positioning combined with machining on ordinary machine tools relies on the operator's experience and skills, which is not only inefficient but also makes it difficult to guarantee the accuracy of angles and positions. In addition, since metal housings in the aerospace field are mostly large thin-walled structures or irregularly shaped parts, the general-purpose fixtures of CNC drilling machines often cannot perfectly fit the outer contour of the housing. During the drilling process, with the impact force and cutting force of the drill bit, the metal housing is prone to slippage, thus affecting the connection quality. Therefore, this invention designs a slanted thread hole with drilling auxiliary device that can avoid shell slippage and ensure drilling accuracy. It is applicable to irregular thin-walled parts with end faces (flanges) at the bottom, such as arc-shaped, conical, and frustum-shaped parts.

[0028] like Figures 1 to 6 As shown, a drilling auxiliary device for a slanted threaded hole includes a machine tool platform 1, a universal radial drilling machine 2, and a drill bushing 3 adapted to the first slanted threaded hole 7. The machine tool platform 1 is provided with a crossbeam assembly, which includes a square mounting plate 8 and four crossbeams 6, which form a cross shape. The crossbeams 6 are provided with scale lines. Specifically, the four sides of the mounting plate 8 are provided with mounting grooves 12, and one end of the crossbeam 6 is provided with a mounting notch 13 that matches the mounting groove 12. The crossbeams 6 are connected to the mounting plate 8 by fixing bolts. Each crossbeam 6 is fixed to the machine tool platform 1 by two sets of crossbeam pressure plate assemblies. The crossbeam pressure plate assembly includes a support member 15, a crossbeam pressure plate 14, and a locking bolt 16. The crossbeam pressure plate 14 is slidably sleeved on the support member 15, and the lower end of the support member 15 abuts against the machine tool platform 1. The locking bolt 16 passes through the crossbeam pressure plate 14 and is threadedly connected to the machine tool platform 1.

[0029] A screw 9 is provided at the center of the mounting plate 8. The end of the screw 9 away from the machine tool platform 1 is detachably connected to a first clamping assembly. The first clamping assembly includes a clamping plate 10, which is slidably connected to the screw 9. A locking nut 11 for fixing the clamping plate 10 is threaded onto the screw 9. Roller assemblies are slidably connected to the four crossbeams 6. The crossbeams 6 have a U-shaped keyway 18. A U-shaped flat key 19 matching the keyway 18 is connected to the bottom of the connecting frame 17. The flat key 19 is slidably connected to the keyway 18.

[0030] The roller assembly includes a connecting frame 17. The connecting frame 17 has a notch 20 for observing the scale line corresponding to the scale line on the crossbeam 6. The connecting frame 17 is rotatably connected to an inner diameter roller 22 and a flat roller 21 via bearings. The axis of the inner diameter roller 22 is perpendicular to the machine tool platform 1, and the axis of the flat roller 21 extends along the length of the crossbeam 6. The machine tool platform 1 is detachably connected to a roller pressure plate assembly, which includes a roller pressure plate 24 and fastening bolts 23. One end of the roller pressure plate 24 is detachably connected to the machine tool platform 1 via the fastening bolts 23. The machine tool platform 1 has several threaded holes (not shown in the figure) along the length of the crossbeam 6 that mate with the fastening bolts 23 to accommodate housings of different sizes. The other end of the roller pressure plate 24 has a wedge-shaped block for pressing the connecting frame 17, and the inclined surface of the wedge-shaped block can prevent pressure on the flat surface. The rotation of roller 21 causes interference, and the roller pressure plate assembly is used to limit the sliding of the connecting frame 17. The machine tool platform 1 is detachably connected to a second clamping assembly for fixing the second housing 5. The second clamping assembly includes a housing pad 25 and a housing pressure plate 26. The housing pressure plate 26 is located above the housing pad 25, and there is a clamping area between the housing pressure plate 26 and the housing pad 25 for clamping the housing. The housing pressure plate 26 is fixed to the machine tool platform 1 in the same way as the crossbeam pressure plate assembly, that is, the housing pressure plate 26 is slidably sleeved on a support member 15. The lower end of the support member 15 abuts against the machine tool platform 1. The locking bolt 16 passes through the housing pressure plate 26 and is connected to the machine tool platform 1 by threads. The machine tool platform 1 is provided with a number of threaded holes (not shown in the figure) that mate with the locking bolt 16 evenly spaced outward from the center of the mounting plate 8 to accommodate housings of different sizes.

[0031] The specific implementation process is as follows:

[0032] When using this device, install the mounting plate 8 and the four crossbeams 6 on the machine tool platform 1. Adjust the position of each connecting frame 17 on the crossbeam 6 according to the inner diameter of the end face 51 (flange) of the second housing 5 to be drilled as needed. Fix the connecting frame 17 to the machine tool platform 1 using the roller pressure plate 24 and the fastening bolt 23. Make the bottom of the end face 51 of the second housing 5 contact the flat roller 21, and make the inner diameter of the end face 51 contact the inner diameter roller 22. Then rotate the second housing 5 to the designated position. Press the end face 51 of the second housing 5 with the housing pressure plate 26, the support member 15 and the locking bolt 16. Then place the first housing 4 with the first oblique threaded hole 7 pre-drilled on it above the second housing 5 and fix it with the pressure plate 10 and the locking nut 11. Put the drill sleeve 3 into the first oblique threaded hole 7, and the universal radial drilling machine 2 drills the second oblique threaded hole on the second housing 5.

[0033] The machine tool platform 1 is used to install the crossbeam 6 and the housing fixing assembly. The drill sleeve 3 is pre-installed in the first oblique threaded hole 7 drilled in the first housing 4, so that the drill bit of the universal radial drilling machine 2 can extend from the drill sleeve 3 and drill a matching second oblique threaded hole in the second housing 5, ensuring the accuracy of the drilling angle. The crossbeam 6 is provided with scale lines, so that the roller assembly can be adjusted to the corresponding scale position according to the inner circle size of the end face 51 of the second housing 5 to be processed. The end of the screw 9 away from the machine tool platform 1 is detachably connected to the first clamping assembly, so as to overlap and fix the two housings to prevent the housings from slipping during operation. The axis of the inner diameter roller 22 is perpendicular to the machine tool platform 1, and the inner diameter roller 22 fits with the inner diameter of the end face 51 of the housing. The axis of the flat roller 21 is perpendicular to the machine tool platform 1. Extending along the length of the crossbeam 6, the flat roller 21 fits against the end face 51 of the second housing 5, enabling 360° rotation and center positioning of the housing. The roller pressure plate 24 assembly restricts the sliding of the connecting frame 17, and the second clamping assembly presses against the end face 51 of the second housing 5, further fixing the second housing 5 and preventing it from slipping. The use of the first clamping assembly, the second clamping assembly, the roller pressure plate assembly, the drill bushing 3, and the universal radial drilling machine 2 avoids manual scribing, improves efficiency, and enhances the accuracy of angles and positions. Furthermore, the first clamping assembly, the second clamping assembly, and the roller pressure plate assembly can completely fit the outer contour of the second housing 5, preventing the metal housing from slipping during drilling, which would affect the connection quality.

[0034] The crossbeam 6 is fixed to the machine tool platform 1 by a crossbeam pressure plate assembly. The crossbeam pressure plate assembly includes a support 15, a crossbeam pressure plate 14, and a locking bolt 16. This assembly prevents the crossbeam 6 from slipping and affecting drilling accuracy. Furthermore, the locking bolt 16 and the crossbeam pressure plate 14 can be used to adjust the clamping force on the crossbeam 6. The crossbeam 6 has a U-shaped keyway 18. The bottom of the connecting frame 17 is connected to a U-shaped flat key 19 that matches the keyway 18. The flat key 19 is slidably connected within the keyway 18 and serves as a guide, ensuring that the axis of the flat roller 21 is always along the length of the crossbeam 6. This ensures the functionality of the second housing 5's rotation and also guarantees smooth sliding. The housing pressure plate 26 is located above the housing pad 25. The housing pad 25 abuts against the bottom of the end face 51 of the second housing 5, and the housing pressure plate 26 abuts against the top of the end face 51 of the second housing 5. It can fit tightly against the contour of the second housing 5 to fix the second housing 5. It has high stability and further prevents the housing from slipping.

[0035] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific technical solutions or characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A drilling auxiliary device for oblique threaded holes, comprising a machine tool platform (1), a universal radial drilling machine (2), and a drill bushing (3), characterized in that, The machine tool platform (1) is provided with a crossbeam assembly, which includes four crossbeams (6) forming a cross shape, and the crossbeams (6) are provided with scale lines; a screw (9) is provided at the center of the crossbeam assembly, and a first clamping assembly is detachably connected to one end of the screw (9) away from the machine tool platform (1); all four crossbeams (6) are slidably connected with roller assemblies, which include connecting frames (17), and the connecting frames (17) are rotatably connected with inner diameter rollers (22) and flat rollers (21), respectively. The axis of the inner diameter rollers (22) is perpendicular to the machine tool platform (1), and the axis of the flat rollers (21) extends along the length direction of the crossbeams (6); a roller pressure plate assembly is detachably connected to the machine tool platform (1), which is used to limit the sliding of the connecting frames (17); a second clamping assembly for fixing the housing is detachably connected to the machine tool platform (1).

2. The drilling auxiliary device for oblique threaded holes according to claim 1, characterized in that, The crossbeam assembly also includes a square mounting plate (8), with mounting grooves (12) on all four sides of the mounting plate (8). One end of the crossbeam (6) is provided with a mounting notch (13) that matches the mounting groove (12), and the crossbeam (6) is connected to the mounting plate (8) by fixing bolts.

3. The drilling auxiliary device for oblique threaded holes according to claim 2, characterized in that, The crossbeam (6) is fixed to the machine tool platform (1) by a crossbeam pressure plate assembly. The crossbeam pressure plate assembly includes a support member (15), a crossbeam pressure plate (14), and a locking bolt (16). The crossbeam pressure plate (14) is slidably sleeved on the support member (15). The locking bolt (16) passes through the crossbeam pressure plate (14) and is threadedly connected to the machine tool platform (1).

4. The drilling auxiliary device for oblique threaded holes according to claim 1, characterized in that, The crossbeam (6) has a concave keyway (18), and the bottom of the connecting frame (17) is connected to a convex flat key (19) that matches the keyway (18). The flat key (19) is slidably connected to the keyway (18).

5. The drilling auxiliary device for oblique threaded holes according to claim 1, characterized in that, The second clamping assembly includes a housing pad (25) and a housing pressure plate (26). The housing pressure plate (26) is located above the housing pad (25), and there is a clamping area between the housing pressure plate (26) and the housing pad (25) for clamping the housing. The housing pressure plate (26) is detachably connected to the machine tool platform (1) by a locking bolt (16).

6. The drilling auxiliary device for oblique threaded holes according to claim 1, characterized in that, The roller pressure plate assembly includes a roller pressure plate (24) and a fastening bolt (23). One end of the roller pressure plate (24) is detachably connected to the machine tool platform (1) by the fastening bolt (23), and the other end of the roller pressure plate (24) is provided with a wedge block to avoid interference with the rotation of the flat roller (21).

7. The drilling auxiliary device for oblique threaded holes according to claim 1, characterized in that, The first clamping assembly includes a clamping plate (10), which is slidably connected to the screw (9), and the screw (9) is threadedly connected to a locking nut (11) for fixing the clamping plate (10).

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