Inverted cone-shaped groove type piece hole processing device and using method

Abstract

The application provides a processing tool for inverted-cone-shaped groove holes and a use method, and belongs to the field of mechanical manufacturing and processing. The processing tool comprises a guide hole vertical drill sleeve, a fixing support, a swinging support arm, a fastening light pole bolt positioning pin, a fastening bolt, a positioning fastener, a dovetail groove slide rail, a positioning side plate, an outer contour side plate, a transmission rod, an auxiliary transmission rod, a scale ruler I and a scale ruler II. The tool has a novel structure, high matching precision, can be applied to the determination and processing of inverted-cone-shaped groove inner holes in various narrow operation spaces, and solves the problem of inaccurate line drawing of inverted-cone-shaped grooves and incorrect determination of hole positions.

Description

Technical Field

[0001] This invention belongs to the field of mechanical manufacturing and processing, and relates to a device for machining holes in an inverted conical groove and its usage method. Background Technology

[0002] During aircraft assembly, most of the panels at the wing and tail section have an inverted conical groove design. This design offers high strength and good fatigue resistance. However, these grooves are prevalent at the wing and tail sections, and because the dimensions of different structures or mating parts vary, it is impossible to create a fixed template or module for every groove. Furthermore, the precise determination of the hole positions within the grooves during processing requires extensive verification and confirmation. This not only extends the work cycle but also significantly increases the difficulty of the work and can easily lead to deviations or even scrap due to inaccurate marking. The current conventional method for marking lines and determining hole positions involves using an irregularly shaped steel ruler and a gauge block. A gauge block of appropriate thickness (selected according to the size of the slot) is placed inside an inverted conical slot, flush against one side of the slot wall. Then, the irregularly shaped steel ruler is used to measure and mark the lines, held firmly against the gauge block's end face. This method is not only extremely inefficient but also demands a high level of skill and experience from the operator. This is mainly because the worker's hand cannot control the amount of movement while holding the irregularly shaped steel ruler and gauge block, and the view is obstructed by the hand. Wings and tail sections have extremely high structural dimensional requirements. Since the positions of each hole are irregularly distributed within these inverted conical slots, each measurement requires repeated verification before drilling can proceed. Furthermore, when drilling holes with marked positions, the absence of an auxiliary guide sleeve can easily lead to inaccurate drilling at the center position, resulting in hole position deviations. If the deviation is small and within an adjustable range, it is necessary to readjust the correct hole position by using a borrowed hole. Borrowing holes is a labor-intensive, complex, and dangerous process. Slight carelessness can result in oblong holes, figure-eight holes, etc., leading to out-of-tolerance and scrap. Moreover, if the deviation exceeds the expected size (usually considered based on the final hole diameter to determine if the deviation is within the acceptable range for borrowing holes), it directly causes out-of-tolerance and scrap. Replacing wing and tail skin or panels and frames will generate even more quality risks and uncertainties.

[0003] For the above reasons, a tooling for machining holes in inverted conical groove parts was invented. This tooling has a novel structure, high fitting accuracy, and is flexible and convenient to use. It can be adapted to the determination and machining of holes in inverted conical groove parts in various narrow operating spaces. It solves the difficult problems such as inaccurate drawing of inverted conical groove parts, inability to correctly determine the hole position, and easy deviation from the center during drilling. Moreover, it has high working efficiency, is simple and easy to operate, and the machining accuracy meets the technical requirements. Summary of the Invention

[0004] The purpose of this invention is to develop a tooling for machining holes in inverted conical groove parts. It can adapt to narrow and special working spaces, is convenient and flexible to use, and can complete the determination and positioning of the holes in the inverted conical groove in one go on an aircraft, strictly ensuring the accuracy and perpendicularity requirements of the hole position in the groove.

[0005] The technical solution of the present invention is as follows:

[0006] The operating procedure for the inverted conical groove part hole machining device is as follows:

[0007] Step 1: Select a drill bit of appropriate length according to the diameter of the φ2.7mm guide hole vertical drill bushing of the inverted conical groove part hole machining device, clamp it on the drill chuck of the pneumatic drill, tighten it, and connect the air source for use when making holes.

[0008] Step 2: Place the processing device into the inverted conical groove part, so that the outer side plate is inside the inverted conical groove. Tighten the fastening bolts to clamp the processing device to the side wall of the inverted conical groove part with the positioning side plate and positioning fasteners, so that the main body of the processing device frame is fixed in the groove. Check the stability and smoothness of the tooling. If it meets the requirements, prepare to adjust the hole position.

[0009] Step 3: Loosen the locating pins of the fastening bolts on the smooth rod, and adjust the fixed support along the dovetail groove slide rail so that it moves along... Figure 1 The middle positioning side plate moves horizontally and parallel to the center. According to the scale I, the position of the center of the guide hole perpendicular to the drill sleeve hole in this direction is determined. Tighten the positioning pin of the fastening rod bolt to ensure that the positioning position is accurate, stable and reliable.

[0010] Step 4: Shake the rocker arm to make the transmission rod and auxiliary transmission rod move back and forth smoothly. Determine the vertical position of the center of the φ2.7mm guide hole vertical drill sleeve hole in this direction according to the scale II.

[0011] Step 5: Using a pre-clamped drill bit of appropriate length, drill a hole in the vertical drill sleeve of the φ2.7mm guide hole after determining the hole position. This completes the determination of the hole position and hole making work in the groove of the inverted conical groove part.

[0012] A hole-machining device for inverted conical groove parts includes a φ2.7mm guide hole vertical drill sleeve, a fixed support, a dovetail groove slide rail, a positioning side plate, an outer contour side plate, a transmission rod, an auxiliary transmission rod, a scale I, and a scale II.

[0013] The φ2.7mm guide hole vertical drill bushing is made of steel and is used to drill holes based on the φ2.7mm guide hole after the hole position is determined. The fixed support, dovetail groove slide rail, positioning side plate, and outer contour side plate form a stable steel connection structure frame, which allows the φ2.7mm guide hole vertical drill bushing to move in the left and right directions and plays a stabilizing role in the overall structure. The transmission rod, auxiliary transmission rod, scale I, and scale II are all made of steel, while the rocking arm is made of hard plastic. By rotating the rocking arm, the φ2.7mm guide hole vertical drill bushing can move back and forth. When used in conjunction with the fastening rod bolt positioning pin, it can accurately determine the center position of the guide hole vertical drill bushing. The positioning fastener is made of steel, and the fastening bolt is used to ensure the accurate and stable positioning of the overall structure in the inverted conical groove part.

[0014] The beneficial effects of this invention are:

[0015] 1. This invention features a novel structure and precise fit, enabling it to adapt to confined and specialized working spaces. It is convenient and flexible to use, allowing for the determination and positioning of the inner hole position within an inverted conical groove on an aircraft in a single operation. This rigorously ensures the accuracy and perpendicularity requirements of the inner hole position. It solves the long-standing problem of insufficient accuracy in marking lines within certain inverted conical grooves on aircraft.

[0016] 2. Because the tooling adopts a structure combining dovetail groove slide rails and smooth rod positioning bolts, the fit accuracy between tooling parts is greatly improved, making the parallel movement process more stable and reliable.

[0017] 3. Another highlight of this tooling is the combination of the drive shaft and the auxiliary drive shaft. The principle is simple and the utilization rate is high, making the tooling more flexible and convenient to operate.

[0018] 4. The φ2.7mm vertical drill bushing used in this tooling not only helps to determine the correct hole position, but also ensures the verticality of the inner hole of the inverted conical groove. This solves the old operating method of one person drilling while another observes, shortens the work cycle, improves product quality, and saves on personnel. Attached Figure Description

[0019] Figure 1 This is a front view of the present invention;

[0020] Figure 2 This is a cross-sectional view of the present invention;

[0021] Figure 3 This is a top view of the present invention.

[0022] In the figure: 1: φ2.7mm guide hole vertical drill sleeve; 2: fixed support; 3: rocker arm; 4: fastening guide rod bolt positioning pin; 5: fastening bolt; 6: positioning fastener; 7: dovetail groove slide rail; 8: positioning side plate; 9: outer contour side plate; 10: transmission rod; 11: auxiliary transmission rod; 12: scale scale I; 13: scale scale II. Detailed implementation method:

[0023] The φ2.7mm guide hole vertical drill sleeve 1 is made of steel and is used to drill holes based on the φ2.7mm guide hole after the hole position is determined. The fixed support 2, dovetail groove slide rail 7, positioning side plate 8, and outer contour side plate 9 form a stable steel connection structure frame, which allows the φ2.7mm guide hole vertical drill sleeve 1 to move in the left and right directions and plays a stabilizing role in the overall structure. The transmission rod 10, auxiliary transmission rod 11, scale II 12, and scale II 13 are all made of steel, and the rocking arm 3 is made of hard plastic. By rotating the rocking arm 3, the φ2.7mm guide hole vertical drill sleeve 1 can move back and forth. When used in conjunction with the fastening rod bolt positioning pin 4, it can accurately determine the center position of the guide hole vertical drill sleeve. The positioning fastener 6 is made of steel, and the fastening bolt 5 is used to ensure the accurate and stable positioning of the overall structure in the inverted conical groove part.

[0024] When drilling holes in an inverted conical groove part, follow these steps:

[0025] 1) Select a drill bit of appropriate length according to the diameter of the φ2.7mm vertical drill bushing and clamp it on the drill chuck of the pneumatic drill. After tightening, connect the air source for use when drilling.

[0026] 2) Place the processing device into the inverted conical groove part, so that the outer side plate 9 is in the inverted conical groove. Tighten the fastening bolts 5 to clamp the positioning side plate 8 and positioning fasteners 6 to the side wall of the inverted conical groove part, so that the main body of the processing device frame is fixed in the groove. Check the stability and smoothness of the tooling. If it meets the requirements, prepare to adjust the hole position.

[0027] 3) Loosen the locating pin 4 of the fastening bolt on the smooth rod, and adjust the fixed support 2 along the dovetail groove slide rail 7 so that it moves along... Figure 1 The middle positioning side plate 8 moves horizontally and parallel to the center. According to the scale scale I12, the position of the center of the vertical drill sleeve 1 in the direction is determined. Tighten the positioning pin 4 of the fastening rod bolt to ensure that the positioning position is accurate, stable and reliable.

[0028] 4) Shake the rocker arm 3 to make the transmission rod 10 and auxiliary transmission rod 11 move back and forth smoothly. Determine the vertical position of the center of the φ2.7mm guide hole vertical drill sleeve 1 in this direction according to the scale II 13.

[0029] 5) Using a pre-clamped drill bit of appropriate length, drill a hole in the vertical drill sleeve of the φ2.7mm guide hole after determining the hole position. This will complete the determination of the hole position in the groove of the inverted conical groove part and the hole making work.

Claims

1. A method for using a hole-machining device for inverted conical groove parts, characterized in that, The steps are as follows: Step 1: Select the corresponding length of the vertical drill sleeve for the φ2.7mm guide hole of the inverted conical groove part hole processing device (1) Select the drill bit of the corresponding length and clamp it on the drill chuck of the air drill. After tightening, connect the air source for use when making holes. Step 2: Place the hole machining device of the inverted conical groove into the inverted conical groove, so that the outer side plate (9) is in the inverted conical groove. Tighten the fastening bolt (5) to clamp the machining device with the side wall of the inverted conical groove by the positioning side plate (8) and the positioning fastener (6), so that the main body of the machining device frame is fixed in the groove. Check the stability and smoothness of the tooling. If it meets the requirements, prepare to adjust the hole position. Step 3: Loosen the positioning pin (4) of the fastening smooth rod bolt, adjust the fixed support (2) along the dovetail groove slide rail (7) so that it moves horizontally parallel along the positioning side plate (8), determine the position of the center of the guide hole vertical drill sleeve (1) in this direction according to the scale scale I (12), tighten the positioning pin (4) of the fastening smooth rod bolt to ensure that the positioning position is accurate, stable and reliable. Step 4: Shake the rocker arm (3) to make the transmission rod (10) and auxiliary transmission rod (11) move back and forth smoothly. Determine the vertical position of the center of the φ2.7mm guide hole vertical drill sleeve (1) in this direction according to the scale II (13). Step 5: Using a pre-clamped drill bit of appropriate length, drill a hole in the vertical drill sleeve of the φ2.7mm guide hole after determining the hole position. This completes the determination of the hole position and hole making work in the groove of the inverted conical groove part. The inverted conical groove hole processing device includes a φ2.7mm guide hole vertical drill sleeve (1), a fixed support (2), a dovetail groove slide rail (7), a positioning side plate (8), an outer contour side plate (9), a transmission rod (10), an auxiliary transmission rod (11), a scale I (12), and a scale II (13). The φ2.7mm guide hole vertical drill sleeve (1) is connected to the transmission rod (10) and the auxiliary transmission rod (11); the rocking arm (3) is in the form of a disc and is connected to the transmission rod (10). By rotating the rocking arm (3), the transmission rod (10) is driven by the threaded transmission rod, so that the φ2.7mm guide hole vertical drill sleeve (1) can move back and forth. The fixed support (2) is a fixed support for fixing the transmission rod (10) and the auxiliary transmission rod (11); the dovetail slide rail (7) is used to connect the fixed support (2) and the positioning side plate (8) so that it can move laterally; The fastening bolt positioning pin (4) serves to fix and adjust the φ2.7mm guide hole vertical drill sleeve (1), fixed support (2), rocking arm (3), transmission rod (10), and auxiliary transmission rod (11) that are assembled together can move laterally along the slot of the positioning side plate (8). After moving to the position where the hole needs to be drilled, the fastening bolt positioning pin (4) can be locked to fix the structure. The fastening bolt (5) is used to lock the positioning side plate (8) and the positioning fastener (6) so that it can clamp one side edge of the slot of the positioning side plate (8). The positioning fastener (6) is 7-shaped, and the inner side of the 7-shaped part is attached to the upper surface of the slot edge of the positioning side plate (8). The positioning side plate (8) is used to connect the fixed support (2) and the positioning fastener (6). The outer contour side plate (9) is an outer contour side plate used to be inserted into the groove of the grooved part; The scale I (12) is a scale for measuring the lateral movement position, and the scale II (13) is a scale for measuring the longitudinal movement position.

2. The method of using the inverted conical groove hole machining device as described in claim 1, characterized in that, The φ2.7mm guide hole vertical drill sleeve (1) of the inverted conical groove hole processing device is made of steel and is used to make holes based on the φ2.7mm guide hole of the vertical drill sleeve after determining the hole position.

3. The method of using the inverted conical groove hole machining device as described in claim 1, characterized in that, The fixed support (2) of the inverted conical groove hole processing device is connected to the dovetail groove slide rail (7), positioning side plate (8), and outer contour side plate (9) by steel material. This structure is used to move the φ2.7mm guide hole vertical drill sleeve (1) in the left and right directions and to stabilize the overall structure.

4. The method of using the inverted conical groove hole machining device as described in claim 2, characterized in that, The fixed support (2) of the inverted conical groove hole processing device is connected to the dovetail groove slide rail (7), positioning side plate (8), and outer contour side plate (9) by steel material. This structure is used to move the φ2.7mm guide hole vertical drill sleeve (1) in the left and right directions and to stabilize the overall structure.

5. The method of using the inverted conical groove hole machining device as described in any one of claims 1 or 4, characterized in that, The transmission rod (10), auxiliary transmission rod (11), scale I (12), and scale II (13) are all made of steel, and the rocking arm (3) is made of hard plastic. By rotating the rocking arm (3), the φ2.7mm guide hole vertical drill sleeve (1) can move back and forth. When used in conjunction with the fastening rod bolt positioning pin (4), the center position of the guide hole vertical drill sleeve can be accurately determined. The positioning fastener (6) is made of steel, and the fastening bolt (5) is used to ensure the accurate and stable positioning of the overall structure in the inverted conical groove part.

6. The method of using the inverted conical groove hole machining device as described in claim 2, characterized in that, The transmission rod (10), auxiliary transmission rod (11), scale I (12), and scale II (13) are all made of steel, and the rocking arm (3) is made of hard plastic. By rotating the rocking arm (3), the φ2.7mm guide hole vertical drill sleeve (1) can move back and forth. When used in conjunction with the fastening rod bolt positioning pin (4), the center position of the guide hole vertical drill sleeve can be accurately determined. The positioning fastener (6) is made of steel, and the fastening bolt (5) is used to ensure the accurate and stable positioning of the overall structure in the inverted conical groove part.

7. The method of using the inverted conical groove hole machining device as described in claim 3, characterized in that, The transmission rod (10), auxiliary transmission rod (11), scale I (12), and scale II (13) are all made of steel, and the rocking arm (3) is made of hard plastic. By rotating the rocking arm (3), the φ2.7mm guide hole vertical drill sleeve (1) can move back and forth. When used in conjunction with the fastening rod bolt positioning pin (4), the center position of the guide hole vertical drill sleeve can be accurately determined. The positioning fastener (6) is made of steel, and the fastening bolt (5) is used to ensure the accurate and stable positioning of the overall structure in the inverted conical groove part.

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