Efficient finish machining tool and method for aluminum-titanium layered drilling automatic feeding drill

Abstract

The invention provides an aluminum-titanium layered drilling automatic feeding drilling efficient finish machining tool and method, and belongs to the field of aviation aircraft assembling and manufacturing. The machining tool comprises a first drill plate and a second drill plate which are used for drilling a titanium alloy part and an aluminum alloy part correspondingly; and after the aluminum alloy part and the titanium alloy part are fixed, two holes are formed in the aluminum alloy part according to the hole positions formed in the titanium alloy part, the aluminum alloy part is detached, and other holes are formed after the second drill plate is fixed according to the two formed holes. Holes are formed in the aluminum alloy part and the titanium alloy part through the automatic feeding drill, the hole diameter precision of each hole is guaranteed, meanwhile, the hole position degree is guaranteed through the drill plate, and the assembly efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the field of aviation aircraft assembly and manufacturing, and relates to an efficient finishing tool and method for an aluminum-titanium layered hole-making automatic feed drill. Background Art

[0002] In the aviation field, important load-bearing parts such as aircraft intersection joints and fuselage intersection bulkheads are often made of titanium alloy materials, while aircraft skins and non-load-bearing area bulkheads are often made of aluminum alloy materials. When installing holes for some fasteners, it is necessary to drill aluminum alloy materials and titanium alloy materials at the same time. In addition, the hole diameter of the fasteners at the intersection joints of the aircraft is generally large, and the common manual hole making scheme is inefficient.

[0003] The commonly used technical solution for drilling holes in aircraft aluminum-titanium sandwiches is: to ensure the hole diameter of the sandwich, drilling is usually performed from the titanium alloy and drilling out from the aluminum alloy to avoid the vibration of the cutting tool when drilling the titanium alloy material, which will cause the hole diameter of the aluminum alloy part to exceed the tolerance. At present, this hole-making solution has the following shortcomings: (1) The space at some joints is not open, and due to the limited tool space, it is impossible to use traditional pistol drills, angle drills and other tools to make holes; (2) When the hole diameter is large, the traditional hole-making solution requires frequent replacement of cutting tools, resulting in low hole-making efficiency and inconsistent hole-making quality. Summary of the invention

[0004] In response to the problems of the prior art, the present invention provides an efficient finishing tool and method for automatic feed drilling of aluminum-titanium layered holes. The automatic feed drill can be used to make holes in aluminum alloy parts and titanium alloy parts respectively to ensure the accuracy of their respective hole diameters. At the same time, a drilling template is used to ensure the hole position accuracy, thereby improving assembly efficiency.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] The invention discloses an efficient finishing tool for automatic feeding drill for aluminum-titanium layered hole making. The finishing tool comprises a No. 1 drilling template and a No. 2 drilling template, which are used for making holes in titanium alloy parts and aluminum alloy parts respectively.

[0007] The No. 1 drilling template comprises a No. 1 drilling template body 1, a No. 1 drilling template drill sleeve A2, a No. 1 drilling template drill sleeve B3, and an automatic feed drill clamping bolt 4.

[0008] The No. 1 drilling template body 1 is opened according to the shape of the part and the axis of the fastener, and is used to locate the titanium alloy part to confirm the relative position. It is made of aluminum alloy as a whole, and a drill sleeve bottom hole is set thereon according to the target hole position of the titanium alloy part. The drill sleeve bottom hole is fine-machined by CNC, and the No. 1 drilling template drill sleeve A2 and the No. 1 drilling template drill sleeve B 3 are installed in the hole; a number of bolt holes are also formed on the No. 1 drilling template body 1, which are used to fix the automatic feed drill through the automatic feed drill clamping bolt 4 to achieve clamping and ensure the hole making quality.

[0009] The No. 1 drilling template drill sleeve A2 and the No. 1 drilling template drill sleeve B3 are both made of steel as a whole. The two have different outer diameters and are correspondingly installed in the drill sleeve bottom holes. The drill sleeve outer diameter matches the clearance of the drill sleeve bottom hole on the No. 1 drilling template body 1, which is used for automatic feed drill insertion to make holes.

[0010] The No. 2 drilling template comprises a No. 2 drilling template body 5 and a No. 2 drilling template drill sleeve 6.

[0011] The No. 2 drilling template body 5 is made of aluminum alloy as a whole. The bottom hole of the drill sleeve is opened according to the shape of the aluminum alloy part and the axis of the fastener. The bottom hole of the drill sleeve is CNC-finished for installing the No. 2 drilling template drill sleeve 6. The No. 2 drilling template body 5 is positioned using the existing hole positions of the aluminum alloy part.

[0012] The No. 2 drilling template drill sleeve 6 is made of steel as a whole, and its outer diameter matches the clearance of the bottom hole of the No. 2 drilling template body 5. It is connected to the No. 1 drilling template drill sleeve A2 or the No. 1 drilling template drill sleeve B3 using a pin rod and fixed by sand casting to ensure coaxiality.

[0013] An efficient finishing method for aluminum-titanium layered hole-making automatic feed drill is implemented based on the above finishing tool, and the finishing method comprises the following steps:

[0014] Step 1, locate and fix the titanium alloy part and the No. 1 drilling template body 1, fix the automatic feed drill in the bolt hole of the No. 1 drilling template body 1 through the automatic feed drill clamping bolt 4, and use the automatic feed drill to use the No. 1 drilling template drill sleeve A2 and the No. 1 drilling template drill sleeve B 3 to make the hole position of the titanium alloy part.

[0015] Step 2: Use jigs or auxiliary tools to position and fix the aluminum alloy parts and the titanium alloy parts.

[0016] Step 3, using a handheld drill sleeve, utilizing the existing holes of the titanium alloy part to drill two diagonal holes on the aluminum alloy part as positioning reference holes for the No. 2 drill template body 5 .

[0017] Step 4, remove the titanium alloy part, use the stepped pins to use the existing holes to position and install the No. 2 drilling template body 5 on the aluminum alloy part, and make the remaining holes to the final hole.

[0018] The beneficial effects of the present invention are:

[0019] (1) The present invention realizes the layered hole making of the aluminum-titanium sandwich, solves the problem that holes cannot be made simultaneously due to the lack of open space, and ensures that the aperture of each sandwich part meets the design requirements;

[0020] (2) The present invention uses an automatic feed drill to drill holes and uses a drilling template to confirm the hole position of the part, thereby reducing the difficulty of operation, ensuring the hole diameter accuracy and hole quality, reducing the number of frequent tool changes, and improving hole making efficiency.

[0021] (3) The tools and process equipment used in the hole making scheme of the present invention have good rigidity and high stability, ensuring that the quality of the assembled product meets the design requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the structural diagram of drill template No. 1.

[0023] Figure 2 This is the structural diagram of the No. 2 drill template.

[0024] Figure 3 This is the plan for using the No. 1 drill template.

[0025] Figure 4 Use the plan diagram for the No. 2 drill template.

[0026] In the figure: 1- No. 1 drilling template body; 2- No. 1 drilling template drill sleeve A; 3- No. 1 drilling template drill sleeve B; 4- automatic feed drill clamping bolt; 5- No. 2 drilling template body; 6- No. 2 drilling template drill sleeve. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments improved or adjusted by ordinary technicians in this field based on the embodiments of the present invention belong to the protection scope of the present invention.

[0028] The invention discloses an efficient finishing tool for automatic feeding drill for aluminum-titanium layered hole making. The finishing tool comprises a No. 1 drilling template and a No. 2 drilling template, which are used for making holes in titanium alloy parts and aluminum alloy parts respectively.

[0029] The No. 1 drilling template comprises a No. 1 drilling template body 1, a No. 1 drilling template drill sleeve A2, a No. 1 drilling template drill sleeve B3, and an automatic feed drill clamping bolt 4. Figure 1 shown.

[0030] The No. 1 drilling template body 1 is opened according to the shape of the part and the axis of the fastener, and is used to locate the titanium alloy part to confirm the relative position. It is made of aluminum alloy as a whole, and a drill sleeve bottom hole is set thereon according to the target hole position of the titanium alloy part. The drill sleeve bottom hole is fine-machined by CNC, and the No. 1 drilling template drill sleeve A2 and the No. 1 drilling template drill sleeve B 3 are installed in the hole; a number of bolt holes are also formed on the No. 1 drilling template body 1, which are used to fix the automatic feed drill through the automatic feed drill clamping bolt 4 to achieve clamping and ensure the hole making quality.

[0031] The No. 1 drilling template drill sleeve A2 and the No. 1 drilling template drill sleeve B3 are both made of steel as a whole. The two have different outer diameters and are correspondingly installed in the drill sleeve bottom holes. The drill sleeve outer diameter matches the clearance of the drill sleeve bottom hole on the No. 1 drilling template body 1, which is used for automatic feed drill insertion to make holes.

[0032] The second drilling template includes a second drilling template body 5 and a second drilling template drill sleeve 6. Figure 2 shown.

[0033] The No. 2 drilling template body 5 is made of aluminum alloy as a whole. The bottom hole of the drill sleeve is opened according to the shape of the aluminum alloy part and the axis of the fastener. The bottom hole of the drill sleeve is CNC-finished for installing the No. 2 drilling template drill sleeve 6. The No. 2 drilling template body 5 is positioned using the existing hole positions of the aluminum alloy part.

[0034] The No. 2 drilling template drill sleeve 6 is made of steel as a whole, and its outer diameter matches the clearance of the bottom hole of the No. 2 drilling template body 5. It is connected to the No. 1 drilling template drill sleeve A2 or the No. 1 drilling template drill sleeve B3 using a pin rod and fixed by sand casting to ensure coaxiality.

[0035] An efficient finishing method for aluminum-titanium layered hole-making automatic feed drill is implemented based on the above finishing tool, and the finishing method comprises the following steps:

[0036] Step 1: Position the titanium alloy part and the No. 1 drilling template body 1 and fix them. Figure 3 As shown, the automatic feed drill is fixed in the bolt hole of the No. 1 drilling template body 1 through the automatic feed drill clamping bolt 4, and the hole position of the titanium alloy part is made using the automatic feed drill using the No. 1 drilling template drill sleeve A2 and the No. 1 drilling template drill sleeve B3.

[0037] Step 2: Use jigs or auxiliary tools to position and fix the aluminum alloy parts and the titanium alloy parts.

[0038] Step 3, using a handheld drill sleeve, utilizing the existing holes of the titanium alloy part to drill two diagonal holes on the aluminum alloy part as positioning reference holes for the No. 2 drill template body 5 .

[0039] Step 4: Remove the titanium alloy part, and use the stepped pins to position and install the No. 2 drilling template body 5 on the aluminum alloy part using the existing holes. Figure 4 As shown, make the remaining holes to the final hole.

[0040] The above-described embodiments merely express the implementation methods of the present invention, but they should not be understood as limiting the scope of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An aluminum-titanium layered hole-making automatic feed drill high-efficiency finishing tool, characterized in that: The finishing tools include a No. 1 drilling template and a No. 2 drilling template, which are used for making holes in titanium alloy parts and aluminum alloy parts respectively; The No. 1 drilling template comprises a No. 1 drilling template body (1), a No. 1 drilling template drill sleeve A (2), and a No. 1 drilling template drill sleeve B (3); The No. 1 drilling template body (1) is drilled with holes according to the shape of the part and the axis of the fastener, and is used to locate the titanium alloy part and confirm the relative position. A drill sleeve bottom hole is set on it according to the target hole position of the titanium alloy part, and the No. 1 drilling template drill sleeve A (2) and the No. 1 drilling template drill sleeve B (3) are installed in the hole; The No. 1 drilling template drill sleeve A (2) and the No. 1 drilling template drill sleeve B (3) have different outer diameters and are installed in the drill sleeve bottom holes accordingly. The outer diameters of the drill sleeves match the clearance of the drill sleeve bottom holes on the No. 1 drilling template body (1) for automatic feed drill insertion to make holes. The No. 2 drilling template comprises a No. 2 drilling template body (5) and a No. 2 drilling template drill sleeve (6); The second drilling template body (5) is provided with a drill sleeve bottom hole according to the shape of the aluminum alloy part and the axis of the fastener, and is used to install the second drilling template drill sleeve (6). The second drilling template body (5) is positioned by using the existing hole position of the aluminum alloy part; The No. 2 drilling template drill sleeve (6) is made of steel as a whole, and its outer diameter matches the clearance of the bottom hole of the drill sleeve of the No. 2 drilling template body (5). After being connected with the No. 1 drilling template drill sleeve A (2) or the No. 1 drilling template drill sleeve B (3) by using a pin rod, it is fixed by pouring sand to ensure coaxiality.

2. The aluminum-titanium layered hole-making automatic feed drill high-efficiency finishing tool according to claim 1 is characterized in that: The No. 1 drilling template body (1) and the No. 2 drilling template body (5) are made entirely of aluminum alloy.

3. The aluminum-titanium layered hole-making automatic feed drill high-efficiency finishing tool according to claim 1 is characterized in that: The bottom holes of the drill sleeves on the No. 1 drilling template body (1) and the No. 2 drilling template body (5) are finely processed by numerical control.

4. The aluminum-titanium layered hole-making automatic feed drill high-efficiency finishing tool according to claim 1 is characterized in that: The No. 1 drilling template drill sleeve A (2), the No. 1 drilling template drill sleeve B (3) and the No. 2 drilling template drill sleeve (6) are all made of steel.

5. The aluminum-titanium layered hole-making automatic feed drill high-efficiency finishing tool according to claim 1 is characterized in that: The No. 1 drilling template body (1) is also provided with a plurality of bolt holes for fixing the automatic feed drill via the automatic feed drill clamping bolts (4).

6. An efficient finishing method for aluminum-titanium layered hole-making automatic feed drill, based on the finishing tool described in any one of claims 1 to 5, characterized in that: The finishing method comprises the following steps: Step 1, positioning and fixing the titanium alloy part and the No. 1 drilling template body (1), using an automatic feed drill to drill the titanium alloy part hole using the No. 1 drilling template drill sleeve A (2) and the No. 1 drilling template drill sleeve B (3); Step 2, positioning and fixing the aluminum alloy part and the titanium alloy part; Step 3, using a handheld drill sleeve, using the existing holes of the titanium alloy part to drill two diagonal holes on the aluminum alloy part as positioning reference holes for the No. 2 drilling template body (5); Step 4, remove the titanium alloy part, use the existing holes to position and install the No. 2 drilling template body (5) on the aluminum alloy part, and make the remaining holes to the final hole.

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