CN215698287U - L-shaped nonstandard milling cutter for machining undercarriage parts - Google Patents

Abstract

The utility model discloses an L-shaped non-standard milling cutter for processing undercarriage parts, which comprises a cutter handle, wherein the cutter handle comprises a connecting end cutter handle connected with a machine tool, and a cutter holder is arranged at one end far away from the connecting end; one end of the cutter body far away from the cutter holder is fixedly connected with a cutter tip. The utility model has simple structure, can process the corrosion of the inner walls of the holes or the end faces of the holes of some irregular parts of the outer cylinder of the main landing gear of the airplane, solves the problem that the prior art needs to additionally arrange a double-pendulum milling head on equipment to meet the processing requirement, and can be used for processing parts of the same type compared with a non-standard milling cutter specially designed for a single part, thereby having stronger universality.

Description

L-shaped nonstandard milling cutter for machining undercarriage parts

Technical Field

The utility model relates to the technical field of nonstandard milling cutters, in particular to an L-shaped nonstandard milling cutter for machining undercarriage parts.

Background

The parts with complex appearance, thin wall and deep long hole have large processing difficulty, complex process and high quality requirement, which are difficult points and bottlenecks of the processing of the undercarriage products, the parts such as the nose landing gear, the main landing gear piston rod, the outer cylinder, the wheel shaft, the torque arm and the like all belong to slender cylindrical parts and irregular shapes, and most of the materials are ultrahigh-strength steel and titanium alloy which are difficult to cut.

For example: the A320 main landing gear outer cylinder shown in figures 1 and 2 is an irregular part, after the inner wall of some holes or the end face of the holes on the outer cylinder are corroded, the corroded part of the end face needs to be removed by boring or milling to meet the repair requirement specified by a CMM (parts maintenance manual), wherein a mark a in figures 1 and 2 is a Dia A hole of the A320 main landing gear outer cylinder, the end face of the Dia A hole in the Y direction is one of the most difficult processing points in the outer cylinder processing, the Dia A hole axis is 20 degrees, 4 minutes and 27 seconds from the outer cylinder axis, so that the end face of the Dia A hole is inclined relative to the outer wall of the outer cylinder, and the distance from the Dia A hole end face in the Y direction to the opposite end of the outer cylinder is 680 mm;

the existing standard tools are all arranged in the same straight line with a main shaft of a machine tool, and the machine tool is matched with the standard tools to machine the end surfaces of Dia A holes, which mainly has the following problems: firstly, the Dia A hole end surface is inclined relative to the outer cylinder, so that a linear standard cutter cannot process the inclined end surface; secondly, the stroke of a main shaft of a general machine tool cannot exceed 600mm, when the outer cylinder is horizontally placed on a working platform of the machine tool, the distance from the end face of the Dia A hole pointed by the Y direction to the end part of the opposite outer cylinder is 680mm, and the length of the main shaft is not enough to enable a standard cutter to extend from the Y direction to contact with the end face of the Dia A hole; secondly, the cutter needs to be lowered to the same height as the contact surface in normal machining, but when the cutter is lowered to the height close to the end surface of the Dia A hole due to the fact that the Dia A hole is close to the outer cylinder wall, the main shaft of the machine tool interferes with the outer cylinder;

in summary, the end face of the hole cannot be machined by using a standard cutter, and the machining problem of the difficulty can be usually solved by additionally installing a double-pendulum milling head on the equipment or designing a non-standard cutter, so that the machining requirement can be met, but the double-pendulum milling head commonly used in the market has high cost, has certain requirement on the equipment and has high machining difficulty; if the mode of designing the non-standard cutter is adopted to meet the processing requirements of parts, different non-standard cutters are needed for different parts, and the cost of the cutter is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an L-shaped non-standard milling cutter for processing parts of an undercarriage, which can process corrosion on the inner walls of holes or end faces of holes of irregular parts of an outer cylinder of a main undercarriage of an airplane and can also be used for processing parts of the same type.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a non-standard milling cutter of L type of processing undercarriage spare part, includes the handle of a knife, the handle of a knife includes its characterized in that of the link of being connected with the lathe: the cutter holder is provided with a cutter holder at one end far away from the connecting end, a mounting groove with an opening at one end is formed in the cutter holder and is perpendicular to the cutter holder, a cutter body is fixedly inserted in the mounting groove in an inserting mode, a screw hole is formed in one side wall of the mounting groove, a fixing screw is screwed in the screw hole, and the cutter body inserted into the mounting groove is pressed and fixed through the fixing screw; one end of the cutter body, which is far away from the cutter holder, is fixedly connected with a cutter tip.

Furthermore, a reinforcing stop block used for supporting the cutter body is fixedly connected to one side, located on the notch of the mounting groove, of the cutter holder, a counter bore is formed in one side, away from the cutter holder, of the reinforcing stop block, a reinforcing screw is installed in the counter bore, and the reinforcing screw penetrates through the counter bore and then is in threaded connection with the cutter holder.

Furthermore, semicircular avoiding fillets are formed in two sides of the tail end of the mounting groove.

Further, the handle of a knife is hollow structure, the inside interior apopore of L type has still been seted up to the blade holder, the end of intaking of interior apopore with the inside hollow portion intercommunication of handle of a knife, the play water end of interior apopore extends to the blade holder on to the lateral wall of one side of knife tip on the port department of the play water end of interior apopore is provided with the bulb, the bulb inlays to be established on the lateral wall of blade holder, integrated into one piece has condenser tube on the bulb, set up the hole for water spraying that runs through bulb and condenser tube in bulb and the condenser tube, the hole for water spraying with interior apopore intercommunication.

Furthermore, a sealing cover plate is arranged between the ball head and the inner walls of the tool holders on the two sides, the sealing cover plate is fixedly connected with the tool holders through screws, and a sealing leather gasket is further bonded between the sealing cover plate and the ball head.

Further, the handle is a BT50 handle.

Further, the tool apron and the tool handle are of an integrally formed structure.

Further, the tool nose is pressed on the tool body through a screw.

Compared with the prior art, the utility model has the following beneficial effects:

(1) the L-shaped non-standard milling cutter for processing the undercarriage parts is characterized in that a cutter holder is arranged at the working end of a cutter handle, an installation groove vertical to the cutter handle is formed in the cutter holder, and a cutter body is installed on the cutter holder in an inserted manner; for example, the difficulty in processing the Dia A hole end face of the A320 main landing gear outer cylinder is solved, firstly, the cutting track of the cutter point of the milling cutter is a circle taking the main shaft as the center, and the inclined hole end face can be cut;

secondly, when the outer cylinder which is horizontally arranged is milled on a horizontal machine tool, as shown in figure 1, the end face of the Dia A hole is far away from the right end of the outer cylinder and is close to the left end of the outer cylinder, but when a standard cutter is installed on the machine tool spindle, the end face of the Dia A hole can only be milled by extending from the right end of the outer cylinder to the end face of the Dia A hole, as can be seen from fig. 7, after the L-shaped non-standard milling cutter of the present invention is mounted on the machine tool spindle, the cutter body can be turned from the machine tool spindle to the Dia a hole end surface to mill the hole end surface, so that the machine tool spindle does not need to extend from the right end of the outer cylinder to the Dia a hole end surface, the hole end face can be milled by extending from the left end with shorter stroke to the side upper part of the hole end face, so that when a standard cutter is used, the problem that the cutter cannot contact the end face of the Dia A hole due to insufficient stroke of the main shaft; similarly, the L-shaped non-standard milling cutter can also mill the Dia A hole end surface of the outer cylinder which is vertically arranged in the vertical machine tool; in addition, the utility model can ensure that the main shaft does not need to be reduced to the height close to the end surface of the hole by replacing the cutter bodies with different lengths, and simultaneously solves the problem that the interference between the main shaft and the outer cylinder is caused by the reduction of the height of the machine tool main shaft adopting a standard cutter due to the matching of the end surface.

In conclusion, the problem that the machining requirement can be met only by additionally arranging the double-pendulum milling head on the equipment in the prior art is solved according to actual requirements, and the machining cost of the undercarriage parts is greatly reduced; referring to the technology of processing the difficulties in singapore hill-race peak, a German CYTEC double-pendulum milling head needs to be purchased additionally in a workshop, a manufacturer has a price of about 120 ten thousand yuan, and meanwhile, regular maintenance and calibration are still needed in the later period. In reverse view, the cutter body of the L-shaped non-standard milling cutter is the existing turning cutter, the cutter seat is integrally formed on the existing BT50 cutter handle, and the cutter body is fixedly inserted on the cutter seat, so that the set cost is 1.5 ten thousand yuan;

compared with a non-standard cutter specially designed for a single part, the L-shaped non-standard milling cutter has stronger universality; the accessible is dismantled and is changed different cutter bodies, satisfies and process the same type spare part for the workshop need not to design specific nonstandard cutter to the different spare parts of the same type again, thereby saves the expense of workshop purchase nonstandard cutter of the same type function.

(2) As an improvement of the utility model, a reinforcing stop block for supporting the cutter body is fixedly connected to one side of the notch of the mounting groove on the cutter holder, and is connected with the cutter holder by adopting a fixing screw, so that the reinforcing stop block can be conveniently mounted and dismounted, when the end surface arc of the part of the undercarriage to be processed is large, the reinforcing stop block can be mounted, the lengthened cutter body can be supported, when the undercarriage is milled, the reinforcing stop block is always tightly attached to the cutter body, the strength of the cutter body is increased, the purpose of preventing cutter vibration is achieved, and the processing quality can be improved.

(3) An L-shaped inner water outlet hole is formed in the tool apron, one end of the inner water outlet hole is communicated with the hollow part of the tool shank, the other end of the inner water outlet hole extends to the side wall of one side of the notch of the mounting groove in the tool apron, and a cooling water pipe with a ball head is arranged at the port of the end; in the utility model, only the cooling water pipeline is connected to the hollow part of the cutter handle, and when cooling water enters the hollow part of the cutter handle from the cooling water inlet on the cutter handle, the cooling water can be discharged from the water spraying holes of the cooling water pipeline along the L-shaped inner water outlet hole to cool the milling part of the part.

(4) According to the utility model, the sealing cover plate is arranged between the ball head and the inner walls of the tool holders on two sides, the sealing leather gasket is bonded between the ball head and the sealing cover plate, and the sealing leather gasket is used for sealing, so that the ball head can be ensured to rotate between the sealing cover plates on two sides, the direction of a water spray hole of the cooling water pipe can be adjusted, the adjustment on the cooling of different processing parts can be realized, and the tool is very convenient.

Drawings

FIG. 1 is a schematic perspective view of the A320 main landing gear outer barrel when placed horizontally;

FIG. 2 is a schematic perspective view of the A320 main landing gear outer barrel when vertically placed;

FIG. 3 is a perspective view of the overall structure of an L-shaped nonstandard milling cutter according to an embodiment of the utility model;

FIG. 4 is a cross-sectional view of a connection between a tool holder and a reinforcing stop according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view of the tool holder at the positions of an inner water outlet hole, a ball head and a cooling water pipe in the embodiment of the utility model;

FIG. 6 is an enlarged view of a portion of FIG. 2 at A;

fig. 7 is a schematic view of a process of manufacturing an L-shaped non-standard milling cutter according to an embodiment of the present invention.

In the figure: 1-a knife handle; 2-a tool apron; 3, a cutter body; 4-a tool nose; 5-fixing screws; 6-mounting grooves; 7-avoiding a fillet; 8-a cooling water pipe; 9-inner water outlet; 10-water spray holes; 11-a ball head; 12-sealing the cover plate; 13-sealing leather gasket; 14-reinforcing the stopper; 15-counter bore; 16-a reinforcement screw; 17-a machine tool spindle; a-Dia A well.

Detailed Description

The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and examples so that those skilled in the art can better understand and implement the technical solutions of the present invention.

The utility model provides an L-shaped non-standard milling cutter for processing landing gear parts as shown in figures 3-7, which comprises a cutter handle 1, wherein the cutter handle 1 adopts the existing BT50 cutter handle, and the cutter handle 1 is of a hollow structure and comprises a conical connecting end connected with a machine tool spindle 17;

according to the utility model, the tool apron 2 is integrally formed at one end, far away from the connecting end, of the tool shank 1, the tool apron 2 is internally provided with the mounting groove 6 with one open end, the mounting groove 6 is perpendicular to the tool shank 1, the tool body 3 is fixedly inserted in the mounting groove 6, the tool body 3 is an existing turning tool in the embodiment, the butt end of the tool body 3 is fixedly inserted in the mounting groove 6, the cutting end, far away from the tool apron 2, of the tool body 3 is fixedly connected with the tool nose 4, and the tool nose 4 is pressed on the tool body 3 through a screw, so that the tool nose 4 can be conveniently replaced in the connecting mode; in the embodiment, two sides of the tail end of the mounting groove 6 are provided with semicircular avoiding fillets 7; when the existing milling cutter is used for processing the mounting groove 6, the existing milling cutter only can cut a fillet, so that the purpose of clearing the fillet is achieved by arranging avoiding fillets 7 at two sides of the tail end of the mounting groove 6, and the interference between the butt end of the cutter body 3 and the fillets at two sides of the tail end of the mounting groove 6 is avoided when the cutter body 3 is mounted under normal conditions;

in the utility model, a screw hole is arranged on one side wall of the mounting groove 6, a fixing screw 5 is screwed on the screw hole, and the cutter body 3 inserted into the mounting groove 6 can be pressed and fixed through the fixing screw 5.

As shown in fig. 4, as an improvement of the present invention, in order to solve the problem that when a part of a component with a large radius is machined in a machining process, a cutter bar extends out relatively long, which is easy to vibrate, and machining quality is affected, a reinforcing stop 14 is arranged on one side of the cutter holder 2, which is located at a notch of the mounting groove 6, the reinforcing stop 14 is provided with a counter bore 15 on one side away from the cutter holder 2, a reinforcing screw 16 is arranged in the counter bore 15, and the reinforcing screw 16 passes through the counter bore 15 and then is in threaded connection with the cutter holder 2; the reinforcing stop block 14 is fixed on the cutter holder 2 through the reinforcing screw 16, the reinforcing stop block 14 can be conveniently detached and installed at any time, when the undercarriage with a large circular arc is required to be machined, the reinforcing stop block 14 can be installed on one side of the notch of the installation groove 6 on the cutter holder 2, the lengthened cutter body 3 can be supported, the reinforcing stop block 14 is always tightly attached to the cutter body 3 during milling, the strength of the cutter body 3 is increased, the purpose of preventing vibration of the cutter is achieved, and the machining quality is further improved.

As shown in fig. 5 and 6, an L-shaped inner water outlet hole 9 is further formed beside the inner mounting groove 6 of the tool apron 2, a water inlet end of the inner water outlet hole 9 is communicated with the hollow part of the tool holder 1, a water outlet end of the inner water outlet hole 9 extends to a side wall of the tool apron 2 facing the tool tip 4, the side wall extends outwards and obliquely at a position of a water outlet of the inner water outlet hole 9 to form a convex part with an inclined plane, a ball head 11 is embedded on the inclined plane of the convex part, a cooling water pipe 8 is integrally formed on the ball head 11, water spray holes 10 penetrating through the ball head 11 and the cooling water pipe 8 are formed in the ball head 11 and the cooling water pipe 8, and the water spray holes 10 are communicated with the inner water outlet hole 9; in the utility model, the cooling water pipeline on the equipment is only required to be connected into the hollow part of the cutter handle 1, and when the cooling water enters the hollow part of the cutter handle 1, the cooling water flows into the ball head 11 and the water spraying holes 10 of the cooling water pipe 8 along the L-shaped inner water outlet hole 9 and is discharged, so that the milled part of the part is cooled.

In the embodiment, a sealing cover plate 12 is arranged between the ball head 11 and the inner wall of the tool apron 2 at two sides of the ball head 11, and the sealing cover plate 12 is screwed on the tool apron 2 by a screw penetrating through the sealing cover plate 12 from the outer side; still bonded one deck sealed leather packing 13 between bulb 11 and sealed apron 12 and sealed, through sealed leather packing 13, can ensure that bulb 11 can rotate between the sealed apron 12 of both sides, conveniently adjust the hole for water spraying 10 of condenser tube 8 orientation, realized adjusting the cooling to different positions in the course of working.

According to the L-shaped non-standard milling cutter, the cutter body 3 is an existing turning tool, the cutter handle 1 is an existing BT50 cutter handle, the cutter holder 2 is integrally formed at the working end of the cutter handle 1, and the cutter body 3 is fixedly inserted into the cutter holder 2, so that the purpose of processing irregular parts of an A320 main undercarriage can be met, the problem that the processing requirement can be met only by additionally installing a double-pendulum milling head or designing a non-standard cutter on equipment in the prior art is solved, the processing cost of parts of the undercarriage is greatly reduced, the depth repair capability of the parts of the undercarriage is supplemented to meet certain requirements on the equipment, the autonomous maintenance of the depth of the undercarriage is realized, the maintenance period of a single set of undercarriage is shortened, the maintenance capability of the undercarriage is greatly improved, the failure probability of parts is reduced, and the maintenance income and quality of the single set of the undercarriage are effectively guaranteed.

The using method of the utility model is as shown in fig. 7, for example, the end face of a Dia a hole of an a320 main landing gear outer cylinder is processed on a P-160 boring machine, firstly, an L-shaped non-standard milling cutter of the utility model is installed on a machine tool spindle 17, then the main landing gear outer cylinder is horizontally placed on a workbench, the end face of the Dia a hole to be processed is opposite to the machine tool spindle 17, the main landing gear outer cylinder is clamped and positioned by using a V-shaped block, a pressure plate and the like, the lower bearing aperture is used as a reference, the a320 main landing gear outer cylinder is in a horizontal state by using a dial indicator for calibration, then a B shaft of the workbench is rotated for 20 degrees, 4 minutes and 27 seconds, the axis of the Dia a hole is coincided with the machine tool spindle 17, and the dial indicator is used again for calibration to ensure that the axis of the Dia a hole is coaxial with the axis of the machine tool spindle 17, namely within the form and position tolerance range; controlling the moving stroke of a machine tool spindle 17, enabling an L-shaped non-standard milling cutter at the front end of the spindle to reach the side upper part of the Dia A hole end face, enabling a cutter point 4 on a cutter body 3 to contact the Dia A hole end face, then starting the machine tool, enabling the machine tool spindle 17 to drive a cutter handle 1 to rotate, and enabling the cutter handle 1 to rotate to drive the cutter body 3 to rotate around the spindle to mill the Dia A hole end face.

When the utility model is used for boring the corrosion surface of the inner wall of the hole, the cutter bodies 3 with different lengths can be replaced according to the radius of the hole, and then the whole cutter holder 2 and the cutter body 3 are partially inserted into the hole, so that the inner wall of the hole can be bored.

In addition, compared with a non-standard milling cutter designed for a single part, the L-shaped non-standard milling cutter has stronger universality, can be suitable for the same type of processing, such as the corrosion for milling the end surface of a B-737 series torsion arm hole, the milling of the end surface of a B-777 part requiring the distance of the inner end surface and the diameter of a bush smaller than 280mm, and the like, and does not need to purchase cutters with the same function in a workshop, so that the cost for purchasing the cutters in the workshop is saved, the operation of the L-shaped non-standard milling cutter is simple, convenient and reliable, the training and the maintenance are easy, and the later maintenance cost is low.

The above-mentioned embodiments are only preferred embodiments of the present invention, but should not be construed as limitations of the present invention, and any modifications and improvements based on the concept of the present invention shall fall within the protection scope of the present invention, and the specific protection scope shall be subject to the claims.

Claims (8)

1. The utility model provides a non-standard milling cutter of L type of processing undercarriage spare part, includes handle of a knife (1), handle of a knife (1) is including the link of being connected with the lathe, its characterized in that: a cutter holder (2) is arranged at one end, far away from the connecting end, of the cutter handle (1), a mounting groove (6) with an opening at one end is formed in the cutter holder (2), the mounting groove (6) is perpendicular to the cutter handle (1), a cutter body (3) is fixedly inserted in the mounting groove (6), a screw hole is formed in one side wall of the mounting groove (6), a fixing screw (5) is screwed in the screw hole, and the cutter body (3) inserted in the mounting groove (6) is compressed and fixed through the fixing screw (5); one end of the cutter body (3) far away from the cutter holder (2) is fixedly connected with a cutter point (4).

2. An L-shaped non-standard milling cutter for machining landing gear parts according to claim 1, wherein: one side of the cutter holder (2) positioned at the notch of the mounting groove (6) is fixedly connected with a reinforcing stop block (14) used for supporting the cutter body (3), a counter bore (15) is formed in one side, far away from the cutter holder (2), of the reinforcing stop block (14), a reinforcing screw (16) is installed in the counter bore (15), and the reinforcing screw (16) penetrates through the counter bore (15) and then is in threaded connection with the cutter holder (2).

3. An L-shaped non-standard milling cutter for machining landing gear parts according to claim 2, wherein: handle of a knife (1) is hollow structure, the interior apopore (9) of L type has still been seted up to blade holder (2) inside, the end of intaking of interior apopore (9) with the inside hollow portion intercommunication of handle of a knife (1), the play water end of interior apopore (9) extends to on blade holder (2) towards one side lateral wall of knife tip (4) the port department of the play water end of interior apopore (9) is provided with bulb (11), bulb (11) are inlayed and are established on the lateral wall of blade holder (2), integrated into one piece has cooling water pipe (8) on bulb (11), set up hole for water spraying (10) that run through bulb (11) and cooling water pipe (8) in bulb (11) and cooling water pipe (8), hole for water spraying (10) with interior apopore (9) intercommunication.

4. An L-shaped non-standard milling cutter for machining landing gear parts according to claim 3, wherein: be provided with between bulb (11) and the blade holder (2) inner wall of both sides sealed apron (13), sealed apron (13) through the screw with blade holder (2) fixed connection sealed apron (13) with still bond between bulb (11) and sealed leather packing (13).

5. An L-shaped non-standard milling cutter for machining landing gear parts according to claim 1 or 4, wherein: and semicircular avoiding fillets (7) are formed in two sides of the tail end of the mounting groove (6).

6. An L-shaped non-standard milling cutter for machining landing gear parts according to claim 1, wherein: the knife handle (1) is a BT50 knife handle.

7. An L-shaped non-standard milling cutter for machining landing gear parts according to claim 1, wherein: the tool apron (2) and the tool handle (1) are of an integrally formed structure.

8. An L-shaped non-standard milling cutter for machining landing gear parts according to claim 1, wherein: the tool nose (4) is pressed on the tool body (2) through a screw.

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