Tubular sleeving type structure high-precision cross hole forming device and method

Abstract

The invention belongs to an aircraft assembly technology, and relates to a tubular sleeving type structure high-precision cross hole forming device and method. The device is composed of a device body structure, a connecting pipe positioning mechanism, a connector positioning mechanism and a drill jig. The device body structure is composed of a device body structure, a connecting pipe positioning mechanism, a connector positioning mechanism and a drill jig. The device body structure is provided with a connecting pipe positioning mechanism, a connector positioning mechanism and a drill jig. The connecting pipe positioning mechanism is used for positioning and fastening a connecting pipe on the device main body structure, the joint positioning mechanism is used for positioning and fixing a joint on the connecting pipe, and the drilling jig is used for drilling holes in the connecting pipe to ensure the drilling position degree and precision. The economical efficiency is excellent; the drilling quality is consistent and stable, ergonomics is met, the labor intensity of an operator is low, and operation is convenient. Through long-term application verification, the method has the characteristics of high reliability, stable quality and the like, and has wide popularization and application values.

Description

Technical Field

[0001] The invention belongs to aircraft assembly technology and relates to a high-precision cross hole making device and method for a tubular sleeve-type structure. Background Art

[0002] There are usually many designs for the location of helicopter fuel tanks, but common locations include below the center floor of the fuselage, on both sides of the fuselage, in a safety groove behind the belly, and under the engine. Different helicopter models may have different fuel tank layouts to suit their specific design requirements and structures. The lower part of the helicopter fuel tank connection structure described in this article is connected to the floor insert, and the upper part is connected to the frame beam by bolts through tubular connecting rods and tubular joints. In the field of helicopter manufacturing, the finishing of tubular parts with connecting holes is an extremely difficult process. After finishing, key parameters such as aperture size, coaxiality, verticality and part position need to be ensured, so as to achieve a stable connection between the fuel tank and the structure, eliminate assembly stress, improve the wear resistance of the product, and ensure the reliability and stability of shipborne helicopters during long-term operation.

[0003] In the traditional process of finishing the connecting holes of tubular connecting rods and tubular joints of the sleeve-type structure, the relative position of the two parts is extremely difficult to ensure, and the coaxiality of the two part holes is prone to deviation; the surface verticality of the outer part hole is poor, resulting in a gap between the gasket and the product contact surface when bolting; the position of the two parts is determined by on-machine matching and drawing, and the operating space is not open, the assembly cycle is long, the efficiency is low, and the labor intensity is high, causing fatigue and injury to the operator's waist and shoulders, and not meeting ergonomics; and when the coaxiality and verticality of the product hole are out of tolerance, it is often necessary to increase the hole diameter or scrap the parts for processing, resulting in a huge economic waste. The above factors restrict the finishing quality and efficiency of helicopter tubular connecting rods and tubular joint connecting holes. Summary of the invention

[0004] Purpose of the Invention

[0005] In view of the above problems, the present invention proposes a high-precision cross hole making device and method for a tubular sleeve structure, designs a high-precision, simple and flexible rigid device, and comprehensively improves the process flow, assembly method, process parameters, etc., to achieve high-quality and high-efficiency engineering applications, and break through the difficulty of fine processing of tubular sleeve cross holes.

[0006] Technical Solution

[0007] The present invention proposes a high-precision cross hole making device and method of a tubular sleeve structure, which specifically includes the following:

[0008] A high-precision cross hole drilling device with a tubular sleeve structure is composed of a device main structure, a connecting pipe positioning mechanism, a joint positioning mechanism, and a drilling jig; the device main structure is respectively provided with a connecting pipe positioning mechanism, a joint positioning mechanism, and a drilling jig; the connecting pipe positioning mechanism is used for positioning and fastening the connecting pipe on the device main structure, the joint positioning mechanism realizes positioning and fixing of the joint on the connecting pipe, and the drilling jig is used for drilling holes on the connecting pipe to ensure the drilling position and accuracy.

[0009] Furthermore, the main structure of the device includes a base (10); the connecting pipe positioning mechanism includes two groups of shape positioners and one group of end face positioners, each group of shape positioners is composed of a handle nut (23), a screw (24), two cylindrical pins A (25), a connecting pipe V-shaped positioner A (26), a connecting pipe V-shaped positioner B (27), and two hexagon socket head screws (28), wherein the two cylindrical pins A (25) respectively pass through the through holes on the connecting pipe V-shaped positioner B (27) and are locked by interference fit, and the connecting pipe V-shaped positioner B (27) is provided with two grooves A and groove B, and the connecting pipe V-shaped positioner A is connected at the groove A. (26), the connecting pipe V-shaped positioner A (26) can rotate around the hexagon socket head screw (28), and the two are clearance-matched to realize the opening and closing of the connecting pipe V-shaped positioner A (26); the screw rod (24) and the handle nut (23) can rotate around the cylindrical pin A (25) at the groove B, and the screw rod (24) and the handle nut (23) are connected by threaded matching, and the connecting pipe V-shaped positioner A (26) can be pressed by rotating the handle nut (23); the connecting pipe V-shaped positioner B (27) is connected to the base (10) by two hexagon socket head screws (28) and two cylindrical pins B; another group of external positioners has the same structure;

[0010] The end face locator comprises a baffle plate (20) and two knurled high head screws (16), wherein the knurled high head screws (16) are connected to the lower drilling template B (17) by means of a threaded connection, and the baffle plate (20) is moved up and down along the knurled high head screws (16) by means of two grooves C provided therewith;

[0011] The joint positioning mechanism consists of an upper part and a lower part. The upper part of the mechanism comprises an angle seat (1), two knurled nuts A (2), two positioning bolts (3), a joint end face positioner (4), a locking handle (5), an AM8 knurled nut B (6), and a locking positioning pin (7). The bottom of the angle seat (1) is connected to the base (10) by two hexagon socket head screws (28) and two cylindrical pins B. The upper part is connected to the joint end face positioner (4) by two positioning bolts (3) and two knurled nuts A (2). After the joint end face positioner (4) is positioned and fitted with the joint belly plate surface, it is tightened by the locking handle (5), the knurled nut B (6), and the locking positioning pin (7). The locking positioning pin (7) and the joint hole are in a clearance fit.

[0012] The lower part of the mechanism is composed of 4 knurled high head screws (18), 2 pressure plates (19), and 2 L-shaped plates (29). The L-shaped plates (29) are connected to the base (10) by 2 hexagon socket head screws (28) and 2 cylindrical pins B. The pressure plate (19) can be adjusted in horizontal direction according to the actual position of the joint. The pressure plate (19) is fixed by the knurled high head screws (18) by using two grooves D on the structure of the pressure plate (19) itself, thereby realizing the positioning of the end face of the product joint.

[0013] The drilling template is composed of an upper drilling template A (8), an upper drilling template B (11), a lower drilling template A (13), a lower drilling template B (17), 7 sets of drill sleeves (15), 7 drill sleeve clamping screws (14), 4 bent handle pins (9), and 4 sets of long bent handle pins (22). The upper drilling template A (8), the lower drilling template A (13) and the base (10) are connected by 2 hexagon socket head screws (28) and 2 cylindrical pins B respectively. The upper drilling template A (8) and the upper drilling template B (11) are connected by the bent handle pins ( 9), the lower drilling template A (13) and the lower drilling template B (17) are connected by another bent handle pin (9), the drill sleeve clamping screw (14) is used in conjunction with the drill sleeve (15) to prevent the drill sleeve (15) from rotating during use, and the long bent handle pin (22) is used for positioning and connecting the product connecting pipe and the joint, and can pass through the upper drilling template A (8) and the upper drilling template B (11), the lower drilling template A (13) and the lower drilling template B (17), and the drill sleeve (15) and the drilling template are clearance-matched by means of through holes.

[0014] Furthermore, the device also includes a handle (21), and the handle 21 is positioned on the base (10) by welding.

[0015] Furthermore, there are two handles (21), which are symmetrically distributed on both sides of the base (10).

[0016] Furthermore, the connecting pipe V-shaped positioner A (26) and the connecting pipe V-shaped positioner B (27) are rubber parts bonded to the product contact surface, which have the function of pressing and preventing damage to the surface of the connecting pipe, and the rubber parts are consumables.

[0017] Furthermore, the drill sleeve (15) includes 7 levels, which are used to match the hole making requirements of the product precision hole.

[0018] Furthermore, the long curved handle pin (22) includes two levels, specifically Φ3 and Φ6, which are used to match the initial hole and final hole of the connection pipe and the joint precision hole respectively.

[0019] Further, the knurled high head screw (16) is specifically M6. The cylindrical pin A (25) is specifically A8X40. The cylindrical pin B is specifically A8X35. The knurled nut A (2) is specifically AM5. The knurled nut B (6) is specifically AM8. The knurled high head screw (18) is specifically M8. The drill sleeve clamping screw (14) is specifically M6.

[0020] Furthermore, the joint end face locator (4) is detachable. The bent handle pin (9) is specifically Φ6. The drill sleeve (15), the long bent handle pin (22), the bent handle pin (9), the positioning bolt (3), and the knurled nut B (6) are consumable parts and can be replaced according to actual use.

[0021] There are three groups of tubular connecting pipes and tubular joints described in this article. The hole making methods are the same, so only one group of hole making methods is described:

[0022] A method for making high-precision cross holes in a tubular sleeve structure, comprising the following steps:

[0023] First positioning. Open the connecting pipe V-shaped positioner A (26) on the hole-making device; clean the inner surface of the connecting pipe V-shaped positioner B (27) that contacts the product to ensure that there is no debris on the surface; then put the product connecting pipe into the V-shaped positioner B (27), and use the baffle (20) to position the end face of the tubular connecting pipe on the upper part of the product; use the joint end face positioner (4) and the 2-ΦaHb hole of the tubular joint on the upper part of the product to position the joint; after the above positioning is completed, use fasteners (locking pins, nuts, bolts, etc.) to effectively tighten to ensure that there is no gap between the parts on the device, the device and the product at the positioning position.

[0024] The first high-precision hole making. Use a drill sleeve (15) to make the cross-connecting holes for the upper connecting pipe and the joint of the product. The hole making process is: drilling Φn → expanding Φn+2.2 → expanding Φn+2.6 → reaming Φn+2.7 → reaming Φn+2.8 → reaming Φn+2.9 → reaming Φn+3, H8; the connecting hole is a cross-type structure. During the process of drilling one hole, a long bent handle pin (22) is required to be used for positioning the other hole throughout the process; when drilling holes, prevent excessive cutting volume from causing structural vibration, reduce the feed amount each time, and increase the number of feeds; try to complete the reaming of a single hole at one time; during the reaming process, ensure that the lubricant is sufficient and the selected lubricant has a cooling function. After each hole making, use a vacuum cleaner to clean the metal chips generated.

[0025] Remove the product from the rack for the first time and clean it. Open all the fasteners on the device used to connect and tighten the positioner, remove the tubular connecting pipe and tubular joint from the hole making device, and remove the burrs on the edge of the product hole. Use a powerful vacuum cleaner to clean the excess generated during the hole making process, and wipe the cooling lubricant on the device and the product with a wiping cloth, alcohol or acetone and other solvents.

[0026] Second positioning. Use bolts + nuts + washers to connect the upper tubular joint to the frame and beam on the body structure; the upper tubular joint to the tubular connecting pipe; the lower tubular joint to the oil tank. All bolt-nut connections are tightened or fixed according to the requirements of the product drawings, so that their status fully meets the requirements of product installation.

[0027] Drill the initial hole. Drill the initial hole of Φn between the lower connecting pipe and the lower tubular joint according to the Φm prefabricated hole on the lower tubular joint of the product. Clean the holes after drilling, then remove the bolts + nuts + washers of the upper and lower tubular joints and the tubular connecting pipe, remove the upper and lower tubular joints and the tubular connecting pipe from the machine, and clean the burrs and excess materials generated during the hole drilling process.

[0028] The third positioning. Use the hole-making device to reposition the connecting pipe and the joint. The connecting pipe and the upper joint of the product are positioned using the Φ6 grade specification of the long bent handle pin (22), the connecting pipe V-type positioner A (26), and the connecting pipe V-type positioner B (27); the connecting pipe and the lower joint are positioned using the Φ3 grade specification of the long bent handle pin (22) through the Φ3 hole that has been made. The end face of the lower joint is positioned by the pressure plate (19), the knurled high head screw (18), and the L-shaped plate (29). When positioning, adjust the relative position of the pressure plate and the joint through the groove D on the pressure plate to ensure that the joint surface and the pressure plate surface are completely in contact. After positioning is completed, use fasteners (locking pins, nuts, bolts, etc.) to effectively tighten to ensure that there is no gap between the parts on the device, the device and the product at the positioning position.

[0029] The second high-precision hole making. Use a drill sleeve to make the cross-connecting hole between the connecting pipe and the joint in the lower part of the product. The hole making process is: reaming Φn+2.2 → reaming Φn+2.6 → reaming Φn+2.7 → reaming Φn+2.8 → reaming Φn+2.9 → reaming Φn+3, H8; the connecting hole is a cross-type structure. During the process of making a hole, a long curved handle pin (22) is required to be used for positioning the other hole throughout the process; when making holes, prevent excessive cutting volume from causing structural vibration, reduce the feed amount each time, and increase the number of feeds; try to complete the reaming of a single hole at one time; during the reaming process, ensure that the lubricant is sufficient and the selected lubricant has a cooling function. After each hole making, use a vacuum cleaner to clean the metal chips generated.

[0030] Remove the device from the rack and clean it for the second time. Open all the fasteners on the device used to connect and tighten the positioner, remove the tubular connecting pipe and tubular joint from the hole making device, and remove the burrs on the hole edge. Use a powerful vacuum cleaner to clean the excess generated during the hole making process, and wipe the cooling lubricant on the device and the product with a wiping cloth, alcohol or acetone and other solvents.

[0031] The beneficial effects of this application are:

[0032] The present invention proposes a high-precision cross-hole making device and method for a tubular sleeve structure, which has the following advantages in improving the hole making accuracy of helicopter tubular sleeve structure parts, ensuring processing quality and improving production efficiency: the final hole accuracy is not less than H8 level; the hole wall finish is not less than Ra3.2; the coaxiality of the same group of tubular connecting rods and joints is not less than φ0.05mm; the verticality of the hole on one side of the connecting pipe is not less than φ0.04mm; the on-machine matching time of the product is reduced by at least 50% compared with the traditional method; the scrap rate of parts is reduced to 0%, which has excellent economy; the hole making quality is consistent and stable, meets ergonomics, the operator has low labor intensity and is easy to operate. The method of the present invention has been verified by long-term application and has the characteristics of high reliability and stable quality, and has wide promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure;

[0034] Including: (1) Angle seat; (2) AM5 knurled nut (2 pieces); (3) Positioning bolt (2 pieces); (4) Joint end face locator; (5) Locking handle; (6) AM8 knurled nut; (7) Locking positioning pin; (8) Upper drilling template 1; (9) Φ6 bent handle pin (4 pieces); (10) Base; (11) Upper drilling template 2; (12) A8X35 cylindrical pin B (14 pieces); (13) Lower drilling template 1; (14) M6 drill sleeve clamping screw (6 pieces); (15) Drill sleeve (6 groups in total, each group has 7 levels); (16) M6 knurled high head screw (2 pieces); (17) Lower drilling template 2; (18) M8 knurled high head screw (4 pieces); (19) Pressure plate (2 pieces);

[0035] (20)——stopper; (21)——handle; (22)——long curved handle pin (4 groups in total, 2 levels in each group); (23)——handle nut (2 pieces); (24)——screw (2 pieces); (25)——A8X40 cylindrical pin (4 pieces); (26)——connecting pipe V-type positioner 1;

[0036] (27)——Connecting pipe V-type positioner 2; (28)——Hexagon socket head screw (12 pieces); (29)——L-type plate (2 pieces)

[0037] Figure 2 This is a schematic diagram of the connecting pipe application;

[0038] Wherein (35) is the connecting pipe A; (30) is the joint AA; (31) is the joint AB; (32) is the oil tank; (33) is the structural beam; (34) is the structural frame; DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the implementation of the present invention clearer, the technical scheme in the embodiment of the present invention will be described in more detail in combination with the embodiment of the present invention. In the example, the same or similar reference numerals throughout represent the same or similar originals or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of them. The embodiments described below by reference are exemplary and intended to be used to explain the present invention, and should not be construed as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present invention. The following is a detailed description in combination with the embodiments of the present invention.

[0040] The helicopter fuel tank described in this article is located on the left side of the middle fuselage cabin. The upper part of the fuel tank is connected to the structure through three groups of tubular connecting pipes and tubular joints. Each group includes one connecting pipe and two joints. The connecting pipes and joints are sleeve structures. The connecting holes are two groups of Φ6H8 cross holes for the installation of bolts and nuts. The structure is as follows: Figure 2 :

[0041] Based on the above requirements, a high-precision cross hole making device and method of a tubular sleeve structure is invented. Since the connection forms of the three groups of connecting pipes and joints are the same, the hole making device and method are also the same. The following only describes the implementation process of the connecting pipe A and the joints AA and AB. Specifically, it includes the following:

[0042] First positioning: ① Use two positioning bolts (3) and two knurled nuts A (2) to connect and tighten the diagonal seat (1) and the joint end face locator (4); fit the flat surface of the joint AA ear with the joint end face locator (4), and use the locking handle (5) and AM8 knurled nut B (6) to lock the positioning pin (7) through the 2-Φ10H8 hole on the joint AA to tighten the joint.

[0043] ② Open the connecting pipe V-shaped positioner A (26) and the connecting pipe V-shaped positioner B (27), and insert the connecting pipe A into the joint AA to form a sleeve structure; use the handle nut (23) and the screw (24) to connect the connecting pipe V-shaped positioner 1 (26) and the connecting pipe V-shaped positioner B (27), and realize the positioning and tightening of the connecting pipe A.

[0044] The first high-precision hole making: the upper drilling template A (8) and the upper drilling template 1 (11) are connected by two Φ6 bent shank pins (9), and the Φ3 grade drill sleeve in the drill sleeve (15) is used to make the initial hole Φ3 of the cross hole between the connecting pipe A and the joint AA (only one side is drilled), and the Φ3 specification pin in the long bent shank pin (22) is used for positioning, and then the 2-Φ6H8 bolt holes on the other side of the connecting pipe A and the joint AA are drilled: drilling Φ3 → expanding Φ5.2 → expanding Φ5.6 → reaming Φ5.7 → reaming Φ5.7 → reaming Φ5.8 → reaming Φ5.9 → reaming Φ6H8, after completion, the Φ8 specification pin in the long bent shank pin (22) is used for positioning, and the same hole making process is used to make the 2-Φ6H8 bolt holes on the cross side. The connecting hole is a cross-type structure. During the process of drilling one hole, a long curved handle pin (22) is used to position the other hole throughout the process. When drilling holes, excessive cutting volume should be prevented from causing structural vibration. The feed volume should be reduced each time and the number of feeds should be increased. The reaming of a single hole should be completed at one time as much as possible. During the reaming process, sufficient lubricant should be ensured and the selected lubricant should have a cooling function. After each drilling, a vacuum cleaner should be used to clean the metal chips generated.

[0045] First time of unloading and cleaning: Open the handle nut (23) and screw (24) connected to the connecting pipe V-type positioner A (26) and the connecting pipe V-type positioner B (27); remove the positioning bolt (3), AM5 knurled nut, locking handle (5), AM8 knurled nut B (6) and locking positioning pin (7) connected to the joint positioner (4); after removing the connecting pipe A and the joint AA, use a powerful vacuum cleaner to clean the excess materials generated during the hole making process, and wipe the cooling lubricant on the device and the product with a wiping cloth, alcohol or acetone and other solvents.

[0046] Second positioning: Use standard product parts hexagonal bolts, hexagonal self-locking screws, and washers to connect the oil tank (4) and the structural floor; the oil tank (4) and the connecting pipe A and the joint AB; the structural beam (5), the structural frame (6) and the connecting pipe A and the joint AA.

[0047] Making initial hole: Use the 2-Φ2.1 initial hole on the joint AB to make the initial hole for the bolt connection hole that matches the connecting pipe A, and expand the hole to φ3.0. After disassembling the product standard parts, remove the connecting pipe A, tubular joint AA, and tubular joint AB from the machine.

[0048] The third positioning: Use a hole-making device to position the connection pipe A and the joints AA and AB. Use two Φ6.0 long bent handle pins to position the connection pipe A and the joint AA. Use a connection pipe V-shaped positioner A (26) and a connection pipe V-shaped positioner B (27) to position and tighten the middle part of the connection pipe A. Use two Φ3 long bent handle pins (22) to position the connection pipe A and the joint AB through the Φ3 holes. Adjust the positions of the joint end face pressure plate (19), the knurled high head screw (18) and the L-shaped plate (29). After ensuring that the end face of the joint AB ear is completely fitted with the joint end face pressure plate (19), remove the Φ3 long bent handle pin (22) on the joint AB.

[0049] Second high-precision hole making: Use the drill sleeve (15) to make a connection hole between the connecting pipe A and the joint AB. The hole making process is: expanding hole Φ5.2 → expanding hole Φ5.6 → reaming hole Φ5.7 → reaming hole Φ5.8 → reaming hole Φ5.9 → reaming hole Φ6H8. After the hole is made, a Φ6.0 long curved handle pin (22) is used to position the hole; then another connecting hole is made, and the hole making process is: expanding hole Φ5.2→expanding hole Φ5.6→reaming hole Φ5.7→reaming hole Φ5.8→reaming hole Φ5.9→reaming hole Φ6H8; the connecting hole is a cross-type structure, and in the process of making one hole, the long curved handle pin (22) needs to be used to position the other hole throughout the whole process; when making holes, to prevent the structure from vibrating due to excessive cutting amount, the feed amount should be reduced each time and the number of feeds should be increased; the reaming work of a single hole should be completed at one time as much as possible; during the reaming process, it is necessary to ensure that the lubricant is sufficient and the selected lubricant has a cooling function, and a vacuum cleaner should be used to clean the metal chips generated after each hole making.

[0050] Second time of unloading and cleaning: Open the handle nut (23) and screw (24) connected to the connecting pipe V-type positioner A (26) and the connecting pipe V-type positioner B (27); remove the connecting pipe A and the joint AA and use two Φ6.0 grade long curved handle pins for positioning; remove the joint end face pressure plate (19) and knurled high head screw (18); remove the long curved handle pin (22) of the connecting pipe A and the joint AB; after removing the connecting pipe A and the joints AA and AB, use a powerful vacuum cleaner to clean the excess generated during the hole making process, and wipe the cooling lubricant on the device and the product with a wiping cloth, alcohol or acetone and other solvents.

[0051] It is understood by those skilled in the art that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and unless defined as here, will not be interpreted with idealized or overly formal meanings. The specific implementation methods described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Within the spirit and principle of the present invention, any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment of equivalent changes for application in other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the technical solution content of the present invention, any modification, equivalent replacement, improvement, etc., made according to the technical essence of the present invention, should be included in the protection scope of the present invention.

Claims

1. A high-precision cross-hole making device with a tubular sleeve structure, characterized in that: It consists of a device main structure, a connecting pipe positioning mechanism, a joint positioning mechanism, and a drilling jig; the device main structure is respectively provided with a connecting pipe positioning mechanism, a joint positioning mechanism, and a drilling jig; the connecting pipe positioning mechanism is used to position and fasten the connecting pipe on the device main structure, the joint positioning mechanism positions and fixes the joint on the connecting pipe, and the drilling jig is used to make holes on the connecting pipe to ensure the drilling position and accuracy.

2. The device according to claim 1, characterized in that The main structure of the device includes a base; the connecting pipe positioning mechanism includes 2 groups of shape positioners and 1 group of end face positioners, each group of shape positioners consists of a handle nut, a screw, 2 cylindrical pins A, a connecting pipe V-type positioner A, a connecting pipe V-type positioner B, and 2 hexagon socket head screws, wherein the 2 cylindrical pins A pass through the through holes on the connecting pipe V-type positioner B respectively and are locked by interference fit. The connecting pipe V-type positioner B is provided with two grooves A and groove B. The connecting pipe V-type positioner A is connected at the groove A, and the connecting pipe V-type positioner A can rotate around the hexagon socket head screw, and the two are clearance-fitted to realize the opening and closing of the connecting pipe V-type positioner A; the screw and the handle nut can rotate around the cylindrical pin A at the groove B, and the screw and the handle nut are connected by threaded fit, and the connecting pipe V-type positioner A can be pressed by rotating the handle nut; the connecting pipe V-type positioner B is connected to the base by 2 hexagon socket head screws and 2 cylindrical pins B; the other group of shape positioners has the same structure; The end face locator includes a baffle and two knurled high head screws, wherein the knurled high head screws are connected to the lower drilling template B by threaded connection, and the baffle is moved up and down along the knurled high head screws by two grooves C provided therewith; The joint positioning mechanism consists of an upper and lower part. The upper part of the mechanism includes an angle seat, two knurled nuts A, two positioning bolts, a joint end face positioner, a locking handle, an AM8 knurled nut B, and a locking positioning pin. The bottom of the angle seat is connected to the base through two hexagon socket head screws and two cylindrical pins B. The upper part is connected to the joint end face positioner through two positioning bolts and two knurled nuts A. After the joint end face positioner is positioned and fitted with the joint web surface, it is tightened by the locking handle, knurled nut B, and locking positioning pin. The locking positioning pin and the joint hole are clearance-matched. The lower part of the mechanism consists of 4 knurled high-head screws, 2 pressure plates, and 2 L-shaped plates. The L-shaped plate is connected to the base through 2 hexagon socket head screws and 2 cylindrical pins B. The pressure plate can adjust the horizontal direction according to the actual position of the joint. The two grooves D on the pressure plate itself are used to tighten and fix it through the knurled high-head screws, thereby realizing the positioning of the product joint end face; The drilling template consists of an upper drilling template A, an upper drilling template B, a lower drilling template A, a lower drilling template B, 7 groups of drill sleeves, 7 drill sleeve clamping screws, 4 bent handle pins, and 4 groups of long bent handle pins. The upper drilling template A and the lower drilling template A are connected to the base through 2 hexagon socket head screws and 2 cylindrical pins B respectively, the upper drilling template A is connected to the upper drilling template B through a bent handle pin, and the lower drilling template A and the lower drilling template B are connected through another bent handle pin. The drill sleeve clamping screw is used in conjunction with the drill sleeve to prevent the drill sleeve from rotating during use. The long bent handle pin is used for positioning and connecting the product connecting pipe and joint, and can pass through the upper drilling template A and the upper drilling template B, the lower drilling template A and the lower drilling template B. The drill sleeve and the drilling template are clearance-matched by means of through holes.

3. The device according to claim 2, characterized in that The device also comprises a handle, said handle 21 being positioned on said base by welding.

4. The device according to claim 3, characterized in that There are two handles, which are symmetrically distributed on both sides of the base.

5. The device according to claim 4, characterized in that The connecting pipe V-shaped positioner A and the connecting pipe V-shaped positioner B are rubber parts bonded to the product contact surface.

6. The device according to claim 5, characterized in that The drill sleeve includes 7 levels to match the hole making requirements of product precision holes.

7. The device according to claim 6, characterized in that The long curved shank pin includes two levels, specifically Φ3 and Φ6, which are used to match the initial hole and the final hole of the connection pipe and the joint precision hole respectively.

8. The device according to claim 7, characterized in that The knurled high head screw is specifically M6; the cylindrical pin A is specifically A8X40; the cylindrical pin B is specifically A8X35; the knurled nut A is specifically AM5; the knurled nut B is specifically AM8; the knurled high head screw is specifically M8; the drill sleeve clamping screw is specifically M6.

9. The device according to claim 8, characterized in that The joint end face locator is detachable; the bent handle pin is specifically Φ6.

10. The high-precision cross hole making method of the device as claimed in claim 9, comprising the following: The first positioning: open the V-shaped positioner A of the connecting pipe on the hole-making device; clean the inner surface of the connecting pipe V-shaped positioner B that contacts the product to ensure that there is no debris on the surface; then put the product connecting pipe into the V-shaped positioner B, and use the baffle to position the end face of the tubular connecting pipe on the upper part of the product; use the joint end face positioner and the 2-ΦaHb hole of the tubular joint on the upper part of the product to position the joint; after the above positioning is completed, use fasteners to effectively tighten to ensure that there is no gap between the parts on the device, the device and the product at the positioning position; The first high-precision hole making; use a drill sleeve to make the cross-connecting holes for the upper connecting pipes and joints of the product. The hole making process: drilling Φn → expanding Φn+2.2 → expanding Φn+2.6 → reaming Φn+2.7 → reaming Φn+2.8 → reaming Φn+2.9 → reaming Φn+3, H8; the connecting holes are cross-type structures. During the process of drilling one hole, a long bent-handle pin is required to position the other hole throughout the process; when drilling holes, excessive cutting volume should be prevented from causing structural vibration. The feed volume should be reduced each time and the number of feeds should be increased; try to complete the reaming of a single hole at one time; during the reaming process, ensure that the lubricant is sufficient and the selected lubricant has a cooling function. A vacuum cleaner should be used to clean the metal chips generated after each hole making; The first time it was removed from the shelves and cleaned up; Open all fasteners on the device used to connect and tighten the positioner, remove the tubular connecting pipe and tubular joint from the hole-making device, and remove the burrs on the edge of the product hole; use a powerful vacuum cleaner to clean the excess generated during the hole-making process, and wipe the cooling lubricant on the device and the product with a wiping cloth, alcohol or acetone solvent; Second positioning: Use bolts + nuts + washers to connect the upper tubular joint to the frame and beam on the body structure; the upper tubular joint to the tubular connecting pipe; the lower tubular joint to the oil tank. All bolt-nut connections are tightened or fixed according to the requirements of the product drawings, so that their status fully meets the requirements of product installation; Make the initial hole; drill the Φn initial hole of the lower connecting pipe and the lower tubular joint according to the Φm prefabricated hole on the lower tubular joint of the product; clean up after making the hole, then remove the bolts + nuts + washers of the upper and lower tubular joints and the tubular connecting pipe, remove the upper and lower tubular joints and the tubular connecting pipe from the machine, and clean up the burrs and excess materials generated during the hole making process; The third positioning: Use the hole-making device to reposition the connecting pipe and the joint. The connecting pipe and the upper joint of the product are positioned using the Φ6 grade specification of the long bent handle pin, the connecting pipe V-type positioner A, and the connecting pipe V-type positioner B; the connecting pipe and the lower joint are positioned using the Φ3 grade specification of the long bent handle pin through the made Φ3 hole. The end face of the lower joint is positioned by the pressing plate, the knurled high head screw, and the L-shaped plate. When positioning, the relative position of the pressing plate and the joint is adjusted through the groove D on the pressing plate to ensure that the joint surface and the pressing plate surface are completely fitted. After the positioning is completed, use fasteners to effectively tighten to ensure that there is no gap between the parts on the device, the device and the product at the positioning position; The second high-precision hole making; use a drill sleeve to make the cross-connecting hole between the connecting pipe and the joint in the lower part of the product. The hole making process: reaming Φn+2.2 → reaming Φn+2.6 → reaming Φn+2.7 → reaming Φn+2.8 → reaming Φn+2.9 → reaming Φn+3, H8; the connecting hole is a cross-type structure. During the hole making process of one hole, a long bent-handle pin is required to position the other hole throughout the process; when making holes, prevent excessive cutting volume from causing structural vibration, reduce the feed amount each time, and increase the number of feeds; try to complete the reaming of a single hole at one time; during the reaming process, ensure that the lubricant is sufficient and the selected lubricant has a cooling function. After each hole making, use a vacuum cleaner to clean the metal chips generated; The second time it was removed from the shelves and cleaned up; Open all fasteners on the device used to connect and tighten the locator, remove the tubular connecting pipe and tubular joint from the hole-making device, and remove burrs on the hole edges; use a powerful vacuum cleaner to clean the excess material generated during the hole-making process, and wipe the cooling lubricant on the device and the product with a wiping cloth, alcohol or acetone solvent.

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