Modularized pneumatic double-taper expansion type guiding and rapid fixing device for automatic feeding drill

Abstract

The invention belongs to the field of machining equipment, and provides a modularized pneumatic double-taper expansion type guiding and rapid fixing device for an automatic feeding drill. The device generates displacement through the air cylinder, and the connecting rod transmission mechanism transmits the displacement to drive the double-taper outer taper sleeve to move towards the large-diameter side of the inner taper sleeve and generate deformation; the expansion part of the double-taper outer taper sleeve expands and is in precise shaft hole fit with a drill jig hole, and positioning and preliminary clamping of the mechanism in the drill jig hole are achieved. And the outwards-turned part of the flange is outwards turned after being deformed to form the flange which is clamped at the orifice of the drill plate to realize fastening. The device can be integrated at the front end of portable automatic drilling equipment, rapid positioning and clamping of hole positions are achieved before drilling, machining efficiency is improved while machining precision and quality are guaranteed, and the device is particularly suitable for drilling of materials difficult to machine such as titanium alloy and stainless steel.

Description

Technical Field

[0001] The present invention belongs to the field of processing equipment, and relates to a modular automatic-feed drill pneumatic double-taper expansion type guiding and rapid fixing device. Background Art

[0002] In the high-end equipment manufacturing in fields such as aerospace, it is necessary to efficiently process tens of thousands of connection holes with high precision and high surface quality. However, the aerospace hole-making operation site faces space limitations, and traditional numerical control machine tools and industrial robotic arms are difficult to adapt to. If manual processing methods are adopted, there are problems such as cumbersome drilling steps and low efficiency, which are difficult to meet the production requirements; while portable automatic processing equipment, with its small size and high flexibility, has become the mainstream method for high-quality and high-efficiency processing internationally. The portable processing equipment needs to cooperate with the drill jig tooling to achieve guiding, precise positioning, and ensure processing efficiency during the processing process. The existing fixing devices of automatic hole-making equipment require workers to hold the equipment to achieve the cooperation between the drill and the drill jig tooling. During the continuous processing by workers, the labor intensity is high and the hole-making efficiency is low. At the same time, during the hole-making process of small-volume hole-making equipment for materials such as titanium alloy and stainless steel, the axial force during the processing process is relatively large, and the existing expansion type guiding and fixing devices are fastened by the frictional force generated by the tight fit between the hole and the shaft, which is not sufficient to meet the requirements for stable processing of high-strength materials. Therefore, it is urgent to develop a guiding and stable rapid fixing device suitable for automatic hole-making equipment.

[0003] At present, companies such as CRRC Qingdao have developed this type of product. Han Xiaohui et al. invented "A Drilling Method and Equipment", and the patent publication number is "CN 119328567 A". This invention drills riveting holes at the bottom of blind holes by presetting several concentric blind holes on the workpiece, controlling the movement of the expansion chuck of the automatic feed drill and tightening it into the blind hole, and then starting the automatic feed drill. By tightening the expansion chuck in the blind hole, the stability of the expansion chuck can be ensured, and no additional clamping device is required to clamp the expansion chuck. However, blind holes need to be pre-machined on the workpiece before its use, and it is applicable to rail vehicles. Pu Yuliang et al. invented "A Double Taper Built-in Expansion Tooling", and the patent announcement number is "CN221185536U". This invention drives the double taper mandrel to move linearly into the double taper expansion chuck through a driving device. After the double taper expansion chuck is expanded, the workpiece to be machined of the shaft type is pressed and fitted with the two conical surfaces in the double taper expansion chuck, so as to clamp the workpiece to be machined of the shaft type through the two conical surfaces. However, in the double taper expansion chuck designed in this invention, the double taper structure design only has the same taper design at two positions, and the overall effect is not much different from that of an ordinary single taper expansion chuck, and problems such as uneven force may exist; Zheng Huaqiang et al. invented "An Expansion Chuck for EDU Drilling Equipment", and the patent announcement number is "CN219004686 U", which uses the cooperation of the elastic chuck and the conical surface of the conical head to uniformly expand the elastic chuck, so as to clamp it in the guide hole of the drill template, which can ensure the stability of the connection between the expansion chuck and the drill template. And because there is a close surface contact among the conical head, the elastic chuck and the guide hole of the drill template, the concentricity is guaranteed, and the position error of hole making can be reduced. However, the pulling rod torque of this invention should not be too large, and the clamping force is small. For reciprocating motion mechanisms or difficult-to-machine materials, an additional limiting mechanism needs to be set up.

[0004] To sum up, in order to solve the problems of the quick and precise cooperation between the portable processing equipment and the drill jig tooling, and the large axial force of high-strength materials such as titanium alloy and stainless steel, which cannot be stably clamped, it is necessary to invent an automatic feed drill guiding and rapid fixing device that is convenient to operate, accurately positioned and stable, so as to ensure the machining accuracy and efficiency during hole making work and break the situation that this type of product is monopolized by foreign products. Summary of the Invention

[0005] Based on the need for rapid positioning and clamping of portable automatic feed drilling equipment, the present invention has developed a modular automatic feed drill pneumatic double taper expansion type guiding and rapid fixing device.

[0006] The technical solution of the present invention:

[0007] A modular automatic feed drill pneumatic double taper expansion type guiding and rapid fixing device, including a main body connection part and a working part;

[0008] The main connecting part plays a fixing role, including a cylinder bracket 3, a drill sleeve 12 and a nut 13; the working part plays an expansion guide and a quick fixing role, including a cylinder 1, a cylinder adapter 2, a connecting rod 4, a double-taper outer cone sleeve 5, an outer cone buckle 6, an inner cone sleeve 7, an outer cone pull seat 8, a chip removal barrel 9, a steel sleeve 10, and a hinge pin 11;

[0009] The end of the cylinder adapter 2 is connected to the cylinder 1, and two symmetrical short shafts 2a are provided at the front end of the cylinder adapter 2; the cylinder bracket 3 is an L-shaped structure, one of which is fixed to the surface of the cylinder 1 through the cylinder adapter 2, and the other of which is connected to the upper surface of the drill sleeve 12; the nut 13 is concentrically matched with the drill sleeve 12, and the inner surface of the nut 13 is in contact with the rear flange of the drill sleeve 12; the chip removal barrel 9 is connected to the drill sleeve 12;

[0010] The connecting rod 4 is a stepped structure, with a notch A4a, a connecting hole 4d, a middle hole 4b and a notch B4c arranged in sequence from one end to the other; the hinge pin 11 passes through the steel sleeve 10 and the middle hole 4b of the connecting rod 4 in sequence and is connected to the side of the drill sleeve 12; the two connecting rods 4 are symmetrically installed on both sides of the drill sleeve 12, and the notches A4a of the two connecting rods 4 cooperate with the two short shafts at the front end of the cylinder adapter 2, and are connected through the connecting hole 4d of the connecting rod 4; the external thread of the inner tapered sleeve 7 is connected with the internal thread of the front end of the drill sleeve 12, the drill sleeve 12 is concentrically matched with the external tapered pull seat 8, the inner cone surface of the double-taper outer tapered sleeve 5 is in contact with the outer cone surface of the inner tapered sleeve 7, the inner thread of the outer tapered buckle 6 is connected with the outer thread of the outer tapered pull seat 8, and the flange on the double-taper outer tapered sleeve 5 is clamped; the notch B4c of the connecting rod 4 cooperates with the short shafts at both ends of the outer tapered pull seat 8.

[0011] Furthermore, the double-tapered outer cone sleeve 5 is a cylindrical structure, including 4 expansion parts 5a and 4 flange outward-turned parts 5b, which are arranged alternately to present a petal-like structure, and an expansion joint is provided between each group of expansion parts 5a and flange outward-turned parts 5b; a notch is provided in the middle of the flange outward-turned part 5b near the outside of the bottom, and a flange bayonet is provided on the outside of the top. The inner cone has two different tapers, and the taper near the top is larger. The outer diameter of the expansion part 5a is slightly larger than the outer diameter of the flange outward-turned part 5b, and the inner part has only one taper; double taper A flange is provided at the bottom of the outer tapered sleeve 5, and the outer tapered buckle 6 and the outer tapered pull seat 8 drive the double-tapered outer tapered sleeve 5 through the flange; during the extrusion process of the double-tapered outer tapered sleeve 5 and the inner tapered sleeve 7, the expansion part 5a expands, and due to its larger outer diameter, it first contacts the wall of the drilling template hole to form a precise hole-axis fit; in the process of continued extrusion, the large tapered part on the inner side of the top of the flange outward-turned part 5b is extruded, and is extruded along the outer notch of the flange outward-turned part 5b, and the outer flange snap-in on the top of the flange outward-turned part 5b is turned outward and stuck at the opening of the drilling template hole.

[0012] During operation, the cylinder 1 generates displacement, and the displacement is transmitted through the connecting rod 4 to the outer taper pulling seat 8 and the outer taper pulling buckle 6, and then drives the double-taper outer taper sleeve 5 to move towards the large-diameter side of the inner taper sleeve 7 and deform; due to the relative movement between the tapered surfaces, the expanded part 5a of the double-taper outer taper sleeve 5 expands, and the flange outward-turning part 5b deforms and turns outward to form a flange.

[0013] After the cylinder 1 changes the air supply direction, it pulls back. The connecting rod 4 transmits the power of the cylinder 1 to drive the outer taper pulling seat 8, the outer taper pulling buckle 6, and the double-taper outer taper sleeve 5 as a whole to move towards the small-diameter side of the inner taper sleeve 7 along the axis direction of the drill bushing 12. The outer surface of the expanded part 5a relaxes, and the flange outward-turning part 5b returns to its original shape, thus realizing disassembly at the target hole position.

[0014] The beneficial effects of the present invention: The present invention provides a modular automatic-feed drill pneumatic double-taper expansion type guiding and rapid fixing device. The device includes a main body connection part and a working part. By generating displacement with the cylinder, the displacement is transmitted to the outer taper pulling seat and the outer taper pulling buckle through the connecting rod transmission mechanism, and then drives the double-taper outer taper sleeve to move towards the large-diameter side of the inner taper sleeve and deform; the expanded part of the double-taper outer taper sleeve expands, and realizes precise shaft-hole fit with the drill die hole, realizes the positioning and preliminary clamping of the mechanism in the drill die hole, and the flange outward-turning part deforms and turns outward to form a flange, which is stuck at the orifice of the drill template hole to realize fastening. The device can realize the rapid and stable positioning of the portable automatic hole-making equipment on the processing fixture, greatly shorten the installation time in the processing process of the portable automatic hole-making equipment, improve the positioning accuracy, and ensure the processing accuracy and quality. Description of the Drawings

[0015] Figure 1 is an exploded schematic view of a modular automatic-feed drill pneumatic double-taper expansion type guiding and rapid fixing device of the present invention;

[0016] Figure 2 is a sectional view of the working part of a modular automatic-feed drill pneumatic double-taper expansion type guiding and rapid fixing device of the present invention;

[0017] Figure 3 is a structural diagram of the cylinder adapter.

[0018] Figure 4 is a structural diagram of the connecting rod.

[0019] Figure 5 is a structural diagram of the double-taper outer taper sleeve, where (a) is the front view, (b) is the right view, and (c) is the three-dimensional view.

[0020] Figure 6 is the overall external view of the assembly of a modular automatic-feed drill pneumatic double-taper expansion type guiding and rapid fixing device of the present invention and the automatic-feed drill;

[0021] In the figure: 1 - cylinder, 2 - cylinder adapter, 2a - short shaft, 3 - cylinder bracket, 4 - connecting rod, 4a - notch A, 4b - middle hole, 4c - notch B, 4d - connecting hole, 5 - double-tapered outer cone sleeve, 5a - expansion part, 5b - flange turned-out part, 6 - outer cone pull buckle, 7 - inner cone sleeve, 8 - outer cone pull seat, 9 - chip removal cylinder, 10 - steel sleeve, 11 - hinge pin, 12 - drill bushing, 13 - nut, 14 - fuselage, 15 - power unit, 16 - drill template. Detailed implementation mode

[0022] The following further describes the detailed implementation mode of the present invention in combination with the attached drawings and technical solutions.

[0023] A modular automatic-feed drill pneumatic double-tapered expansion type guiding and quick-fixing device includes a main body connection part and a working part.

[0024] The main body connection part plays a fixing role for the device and includes a cylinder bracket 3, a drill bushing 12 and a nut 13; the working part plays an expansion guiding and quick-fixing role and includes a cylinder 1, a cylinder adapter 2, a connecting rod 4, a double-tapered outer cone sleeve 5, an outer cone pull buckle 6, an inner cone sleeve 7, an outer cone pull seat 8, a chip removal cylinder 9, a steel sleeve 10, and a hinge pin 11.

[0025] Preferably, the bottom external thread of the cylinder adapter 2 is connected to the top threaded hole of the cylinder 1; the side surface of the cylinder 1 is in contact with the side surface of the cylinder bracket 3, and the smooth hole on the surface of the cylinder bracket 3 is bolt-connected to the side threaded hole of the cylinder 1; the bottom smooth hole of the cylinder bracket 3 is bolt-connected to the upper surface threaded hole of the drill bushing 12; the nut 13 is concentrically fitted with the drill bushing 12, and the inner mating surface of the nut 13 is in contact with the right side of the tail flange of the drill bushing 12; the chip removal cylinder 9 is located below the drill bushing 12, and its upper surface is bolt-connected to the lower surface of the drill bushing 12. The inner cone sleeve 7 is thread-connected to the drill bushing 12, the outer cone pull buckle 6 is connected to the outer cone pull seat 8 through an internal thread, and clamps the bottom flange of the double-tapered outer cone sleeve 5.

[0026] The hinge pin 11 passes through the steel sleeve 10 and the middle hole 4b of the connecting rod 4, and is thread-connected to the side of the other drill bushing 12; the inner cone sleeve 7 is thread-connected to the drill bushing 12, the drill bushing 12 is concentrically fitted with the outer cone pull seat 8, the inner cone surface of the double-tapered outer cone sleeve 5 is in contact with the outer cone surface of the inner cone sleeve 7, the internal thread of the outer cone pull buckle 6 is connected to the external thread of the outer cone pull seat 8, and clamps the flange end of the double-tapered outer cone sleeve 5; the notch A 4a on the connecting rod 4 is matched with the notch of the short shaft 2a at the end of the cylinder adapter 2, and the notch B 4c on the lower part of the connecting rod 4 is matched with the short shaft notches at both ends of the outer cone pull seat 8; the two side connecting rods 4 are thread-connected through the connecting hole 4d of the connecting rod 4.

[0027] Preferably, the double-tapered outer cone sleeve 5 consists of an expansion part 5a and a flange outward-turning part 5b. The two parts are arranged alternately, and an expansion joint is provided between each part; a notch is provided on the outer side near the bottom in the middle of the flange outward-turning part 5b, and it has two different tapers inside. The taper near the top is larger, and a flange is provided on the outer side of the top; the outer diameter of the expansion part 5a is slightly larger than the outer diameter of the flange outward-turning part 5b. A flange plate is provided at the bottom of the double-tapered outer cone sleeve 5.

[0028] Preferably, the inner cone sleeve 7 and the drill sleeve 12 are connected by threads. The outer cone pull buckle 6 is connected to the outer cone pull seat 8 through an internal thread and clamps the flange at the bottom of the double-tapered outer cone sleeve 5. When the outer cone pull seat 8 is driven to move leftward, the double-tapered outer cone sleeve 5 moves leftward and is squeezed by the inner cone sleeve 7, causing expansion, and the device is positioned and fixed with the drill jig hole.

[0029] Preferably, after the air cylinder 1 is ventilated, it extends forward, pushes the connecting rod 4 to rotate around the hinge pin 11 through the air cylinder adapter 2, and then drives the outer cone pull buckle 6 and the outer cone pull seat 8 to move towards the large-diameter side of the inner cone sleeve 7. The double-tapered outer cone sleeve 5 moves leftward and is squeezed by the inner cone sleeve 7. The opposite movement between the tapered surfaces causes the double-tapered outer cone sleeve 5 to expand and clamp, and the device is positioned and fixed with the drill jig hole.

[0030] Preferably, during the extrusion process between the double-tapered outer cone sleeve 5 and the inner cone sleeve 7, the expansion part 5a expands and first contacts the wall of the drill jig hole, forming a precise hole-shaft fit to complete the positioning of the device; at the same time, the frictional force generated by the friction with the hole wall can achieve preliminary fixation. During the continuous extrusion process, the large-tapered part on the inner side of the top of the flange outward-turning part 5b is squeezed, expands outward along the bottom groove, and the flange plate on the outer side of the top is stuck to the orifice of the drill jig hole to resist the high axial force during the processing.

[0031] Preferably, after changing the ventilation direction, the air cylinder 1 pulls back. The connecting rod 4 transmits the power of the air cylinder 1 to drive the outer cone pull seat 8, the outer cone pull buckle 6, and the double-tapered outer cone sleeve 5 in the outer and inner cone sleeves to move towards the small-diameter side of the inner cone sleeve 7 along the axis of the drill sleeve 12. The outer surface of the expansion part 5a relaxes, and the flange outward-turning part 5b returns to its original shape, thereby realizing disassembly at the target hole position.

[0032] Preferably, if the size of the target drill jig hole changes, only the double-tapered outer cone sleeve 5, the outer cone pull buckle 6, and the inner cone sleeve 7 need to be replaced to change the working size.

[0033] Example 1

[0034] Reference Figures 1 to 6, A modular automatic feed drill pneumatic double-taper expansion type guiding and quick fixing device, comprising: a cylinder 1, a cylinder adapter 2, a cylinder bracket 3, a connecting rod 4, a double-taper outer cone sleeve 5, an outer cone pull buckle 6, an inner cone sleeve 7, an outer cone pull seat 8, a chip removal cylinder 9, a steel sleeve 10, a hinge pin 11, a drill sleeve 12 and a nut 13.

[0035] In this embodiment, the bottom external thread of the cylinder adapter 2 is connected to the top threaded hole of the cylinder 1; the side surface of the cylinder 1 is in contact with the side surface of the cylinder bracket 3, and the bolt connects the light hole on the side surface of the cylinder bracket 3 and the threaded hole on the side surface of the cylinder 1; the bottom surface of the cylinder bracket 3 is in contact with the upper surface of the drill sleeve 12, and the bolt connects the light hole at the bottom of the cylinder bracket 3 and the threaded hole on the upper surface of the drill sleeve 12; the nut 13 is concentrically fitted with the drill sleeve 12, and the inner mating surface of the nut 13 is in contact with the right side of the tail flange of the drill sleeve 12; the upper surface of the chip removal cylinder 9 is in contact with the lower surface of the drill sleeve 12, and the bolt connects the light hole at the top of the chip removal cylinder 9 and the threaded hole on the lower surface of the drill sleeve 12; the hinge pin 11 passes through the steel sleeve 10 and the middle hole 4b of the connecting rod 4, and is threadedly connected to the side surface of the other drill sleeve 12; the external thread of the inner cone sleeve 7 is connected to the internal thread of the drill sleeve 12, the drill sleeve 12 is concentrically fitted with the outer cone pull seat 8, the inner conical surface of the double-taper outer cone sleeve 5 is in contact with the outer conical surface of the inner cone sleeve 7, the internal thread of the outer cone pull buckle 6 is connected to the external thread of the outer cone pull seat 8, clamping the flange of the double-taper outer cone sleeve 5; the upper notch A4a on the connecting rod 4 is matched with the notch of the short shaft 2a at the end of the cylinder adapter 2, and the lower notch B4c on the connecting rod 4 is matched with the notches of the short shafts at both ends of the outer cone pull seat 8; the two side connecting rods 4 are threadedly connected through the connecting hole 4d of the connecting rod 4.

[0036] During operation, the double-taper outer cone sleeve 5, the outer cone pull buckle 6 and the outer cone pull seat 8 can move as a whole along the axis direction of the drill sleeve 12, and the cylinder 1 and the nut 13 are connected to external equipment. The specific working process is as follows: Insert the double-taper outer cone sleeve 5 into the target hole position. After the cylinder 1 is ventilated, it extends or contracts, driving the short shaft 2a on the cylinder connector 2 to slide in the notch A4a, converting the horizontal thrust or pull of the cylinder 1 into the moment of the connecting rod 4 around the hinge pin 11, and then into the pull / thrust along the axis direction of the drill sleeve 12 given by the notch B4c to the outer cone pull seat 8, driving the double-taper outer cone sleeve 5 and the outer cone pull buckle 6 as a whole to move along the axis direction of the drill sleeve 12 towards the large-diameter side or the small-diameter side of the inner cone sleeve 7. Due to the relative movement between the conical surfaces, the expanded part 5a of the double-taper outer cone sleeve 5 expands or relaxes, achieving precise shaft-hole fit with the drill die hole, and realizing the positioning and preliminary clamping of the mechanism in the drill die hole; the flange outward-turning part 5b turns outwards to form a flange or returns to its original shape, clamping at the orifice of the drill template hole, realizing fastening. Thus, the small automatic hole-making equipment can be quickly clamped or disassembled at the target drill die hole position.

Claims

1. A modular automatic-feed drill pneumatic double-taper expansion type guiding and quick-fixing device, characterized in that, The automatic feed drill pneumatic double-taper expansion type guiding and quick fixing device includes a main body connection part and a working part; The main body connection part plays a fixing role and includes a cylinder bracket (3), a drill bushing (12) and a nut (13); the working part plays an expansion guiding and quick fixing role and includes a cylinder (1), a cylinder adapter (2), a connecting rod (4), a double-taper outer cone sleeve (5), an outer cone pull buckle (6), an inner cone sleeve (7), an outer cone pull seat (8), a chip removal cylinder (9), a steel sleeve (10), and a hinge pin (11); The end of the cylinder adapter (2) is connected to the cylinder (1), and two symmetric short shafts (2a) are provided at the front end of the cylinder adapter (2); the cylinder bracket (3) is an L-shaped structure, one of its support plates is fixed on the surface of the cylinder (1) through the cylinder adapter (2), and the other support plate is connected to the upper surface of the drill bushing (12); the nut (13) is concentrically fitted with the drill bushing (12), and the inner surface of the nut (13) contacts the rear flange of the drill bushing (12); the chip removal cylinder (9) is connected to the drill bushing (12); The connecting rod (4) is a stepped structure, and a notch A (4a), a connection hole (4d), a middle hole (4b) and a notch B (4c) are sequentially arranged from one end to the other end; the hinge pin (11) sequentially passes through the steel sleeve (10) and is connected to the middle hole (4b) of the connecting rod (4) on the side of the drill bushing (12); two connecting rods (4) are symmetrically installed on both sides of the drill bushing (12), and the notches A (4a) of the two connecting rods (4) are fitted with the two short shafts at the front end of the cylinder adapter (2) and are connected through the connection holes (4d) of the connecting rods (4); the external thread of the inner cone sleeve (7) is connected to the internal thread at the front end of the drill bushing (12), the drill bushing (12) is concentrically fitted with the outer cone pull seat (8), the inner conical surface of the double-taper outer cone sleeve (5) contacts the outer conical surface of the inner cone sleeve (7), the internal thread of the outer cone pull buckle (6) is connected to the external thread of the outer cone pull seat (8) to clamp the flange on the double-taper outer cone sleeve (5); the notch B (4c) of the connecting rod (4) is fitted with the short shafts at both ends of the outer cone pull seat (8).

2. The automatic-feed drill pneumatic double-taper expansion type guiding and quick-fixing device according to claim 1, wherein The described double-tapered outer cone sleeve (5) is a cylindrical structure, including 4 expansion parts (5a) and 4 flange out-turned parts (5b), which are arranged alternately, presenting a petal-like structure. An expansion gap is provided between each group of expansion parts (5a) and flange out-turned parts (5b); a notch is opened on the outer side near the bottom in the middle of the flange out-turned part (5b), a flange bayonet is provided on the outer side of the top, and the inner conical surface has two different tapers, with the taper near the top being larger. The outer diameter of the expansion part (5a) is slightly larger than the outer diameter of the flange out-turned part (5b), and it has only one taper inside; a flange plate is provided at the bottom of the double-tapered outer cone sleeve (5), and the outer cone pull buckle (6) and the outer cone pull seat (8) drive the double-tapered outer cone sleeve (5) through the flange plate; during the extrusion process between the double-tapered outer cone sleeve (5) and the inner cone sleeve (7), the expansion part (5a) expands. Due to its larger outer diameter, it contacts the wall of the drill jig hole first, forming a precise hole-shaft fit; during the continuous extrusion process, the large-taper part on the inner side of the top of the flange out-turned part (5b) is extruded, extruded along the notch on the outer side of the flange out-turned part (5b), and the flange bayonet on the outer side of the top of the flange out-turned part (5b) turns outwards and gets stuck at the orifice of the drill jig hole.

3. The automatic feed drill pneumatic double-taper expansion type guiding and rapid fixing device according to claim 1, wherein, During operation, the cylinder (1) generates a displacement, and the displacement is transmitted to the outer cone pull seat (8) and the outer cone pull buckle (6) through the connecting rod (4), and then drives the double-tapered outer cone sleeve (5) to move towards the large-diameter side of the inner cone sleeve (7) and deform; due to the opposite movement between the conical surfaces, the expansion part (5a) of the double-tapered outer cone sleeve (5) expands, and the flange out-turned part (5b) deforms and turns outwards to form a flange.

4. The automatic feed drill pneumatic double-taper expansion type guiding and quick fixing device according to claim 1, characterized in that, After the cylinder (1) changes the ventilation direction, it pulls back. The connecting rod (4) transmits the power of the cylinder (1) to drive the outer cone pull seat (8), the outer cone pull buckle (6), and the double-tapered outer cone sleeve (5) to move towards the small-diameter side of the inner cone sleeve (7) along the axis direction of the drill sleeve (12). The outer surface of the expansion part (5a) relaxes, and the flange out-turned part (5b) returns to its original shape, thus realizing the disassembly at the target hole position.

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