CN111730334B

CN111730334B - End face milling and center hole drilling machine tool

Info

Publication number: CN111730334B
Application number: CN202010599366.0A
Authority: CN
Inventors: 颜灵永; 马永建
Original assignee: Zhejiang Sanhuan Gear Co ltd
Current assignee: Zhejiang Sanhuan Gear Co ltd
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2021-05-04
Anticipated expiration: 2040-06-28
Also published as: CN111730334A

Abstract

The application relates to a machine tool for milling end faces and drilling center holes, which relates to the field of machine tools and comprises a rack, wherein the rack is provided with a chuck and a power seat, and the power seat is provided with a first driving source, a drill bit and a face milling cutter which are driven to rotate by the first driving source; the power seat is provided with a first air cylinder driving the drill bit to stretch and a second air cylinder driving the face milling cutter to stretch, the power seat is provided with an inclined chute, the chute is connected with an installation frame in a sliding manner, the face milling cutter is arranged on the installation frame, the power seat is rotatably provided with a first cone pulley driving the drill bit to rotate, the installation frame is rotatably provided with a second cone pulley driving the face milling cutter to rotate, and the first cone pulley and the second cone pulley are in transmission through wheel surface contact; when the mounting bracket slides along the sliding groove, the first conical wheel and the second conical wheel keep a transmission state, and the rack is provided with a second driving source driving the chuck to rotate. The machine tool can simultaneously perform operations of drilling a central hole and milling an end face on the gear, can complete procedures of drilling the central hole, milling a plane and chamfering the reverse side after clamping a workpiece once, and has the advantages of high processing efficiency and high automation degree.

Description

End face milling and center hole drilling machine tool

Technical Field

The application relates to the field of machine tools, in particular to a machine tool for milling end faces and drilling center holes.

Background

Machine tools are mechanical devices that perform machining and can be used to machine gears. In the machining process of the gear, the end face of the gear blank needs to be milled, a central hole needs to be drilled, and a key groove is further machined in the central hole and used for inserting and connecting the rotating shaft.

The Chinese utility model patent with the publication number of CN208879775U discloses a numerical control end face milling and center hole drilling machine tool, which adopts a symmetrical structure and comprises an integrated base arranged horizontally and symmetrically, wherein a group of modularized sliding tables are respectively fixed on two sides of the top of the integrated base through bolts, a feeding modularized sliding table is arranged at the center of the top of the integrated base, and the feeding modularized sliding table is horizontally vertical to two groups of modularized sliding tables; the workbench is connected with the integrated base through the feeding modular sliding table; the inner side of each group of modular sliding tables is provided with a main shaft box, each main shaft box is connected with a belt box, and each belt box is provided with two power boxes; each spindle box is provided with a drill chuck and a milling cutter; and a servo motor is arranged on the outer side of each group of modular sliding tables.

The above-described related art has the following drawbacks: the machine tool needs to perform operations of drilling a central hole and milling an end face on a gear respectively, and after the gear is drilled with the central hole, the gear needs to be replaced and clamped to a machining position of the milled end face; the time consumption for respectively rotating the central hole and milling the end face is long, the time is needed for replacing the clamping position of the gear, and the machine tool has the defect of low machining efficiency.

Disclosure of Invention

In order to promote machining efficiency, the application provides a mill terminal surface and beat center hole lathe.

The application provides a mill terminal surface and beat center hole lathe adopts following technical scheme:

a machine tool for milling end faces and punching center holes comprises a rack, wherein the rack is provided with a chuck for clamping a workpiece and a power seat opposite to the chuck, and the power seat is provided with a first driving source, a drill bit and a face milling cutter, wherein the drill bit and the face milling cutter are driven to rotate by the first driving source; the method is characterized in that: the power seat is provided with a first air cylinder driving the drill bit to stretch and a second air cylinder driving the face milling cutter to stretch, and the stretching directions of the drill bit and the face milling cutter face the chuck; the power seat is provided with an inclined sliding groove, the sliding groove is connected with an installation frame in a sliding mode, the face milling cutter is arranged on the installation frame, the power seat is rotatably provided with a first driving shaft for driving a drill bit to rotate, the drill bit is fixed to the end portion, away from the first air cylinder, of the first driving shaft, a first cone pulley is sleeved outside the first driving shaft, and the first driving shaft and the first cone pulley are limited to rotate relatively by a first key groove structure; the mounting frame is rotatably provided with a second bevel wheel used for driving the face milling cutter to rotate, the axes of the first bevel wheel and the second bevel wheel are parallel, the conical directions of the first bevel wheel and the second bevel wheel deviate from each other, and the first bevel wheel and the second bevel wheel are in transmission through wheel surface contact;

when the mounting frame slides along the sliding groove, the first conical wheel and the second conical wheel keep a transmission state, and the axis of the face milling cutter can be close to or far away from the axis of the drill bit; the frame is provided with a second driving source for driving the chuck to rotate.

By adopting the technical scheme, when the driving source I runs, the drill bit and the face milling cutter are driven to rotate, the first air cylinder and the second air cylinder are controlled to extend, the drill bit is pressed at the center of a workpiece to perform a process of drilling a central hole, and the face milling cutter is pressed at the end face of the workpiece to perform a process of milling the end face. At this time, along the axial direction of the drill bit, the face milling cutter and the drill bit do not overlap. And the driving source II drives the chuck to rotate, the chuck drives the workpiece to rotate, and the face milling cutter can mill the circumferential peripheral annular region of the end face of the workpiece flat while the drill drills.

After the center hole is drilled, the cylinder is shortened to enable the drill bit to pull out the workpiece, then the mounting frame is driven to move along the sliding groove manually or by equipment, the milling cutter moves towards the direction close to the axis of the drill bit, the face milling cutter moves to the position where the drilled center hole orifice can be milled, and at the moment, the drill bit is far away from the position where the end part is not in contact with the face milling cutter. With the rotation of the chuck, the face milling cutter mills the middle part of the end face of the workpiece, including the position of the hole of the central hole. After the machining is finished, the second control cylinder is shortened, the first driving source and the second driving source are controlled to stop running, and then the workpiece can be blanked.

In conclusion, the machine tool can simultaneously perform operations of drilling a central hole and milling an end face on the gear, and complete plane milling operation on most area of the end face while drilling the central hole on the gear. On the other hand, the machine tool can complete the procedures of drilling a central hole and completely milling the end face after the workpiece is clamped once, and has the advantage of high processing efficiency.

Preferably, the cylinder body of the first air cylinder is fixed with the power seat, the piston rod end of the first air cylinder is rotatably connected to the first driving shaft, the first air cylinder drives the first driving shaft to slide along the axial direction of the first air cylinder when stretching, and the first driving shaft penetrates through the cone pulley and is connected with the first cone pulley in a sliding mode.

By adopting the technical scheme, the first air cylinder can drive the first driving shaft to move axially when stretching, so that the drill bit can stretch; through the first key groove structure, the rotation energy of the first cone pulley is transmitted to the first driving shaft and the drill bit.

Preferably, a cylinder body of the second air cylinder is fixed on the mounting frame, a piston rod end of the second air cylinder is rotatably connected with a second driving shaft, the second air cylinder drives the second driving shaft to slide along the axial direction of the second driving shaft when stretching, the second driving shaft penetrates through the second conical pulley and is in sliding connection with the second conical pulley, and the second driving shaft and the second conical pulley are limited to rotate relatively by a second key groove structure; and the face milling cutter is fixed at the end part of the second driving shaft departing from the second cylinder.

By adopting the technical scheme, the second air cylinder can drive the second driving shaft to move axially when stretching, so that the stretching of the face milling cutter is realized; and the rotation energy of the second conical wheel is transmitted to the second driving shaft and the face milling cutter through the second key groove structure.

Preferably, a connecting frame is fixed on a piston rod of the first air cylinder, a guide rod is fixed on the connecting frame, a guide hole in sliding connection with the guide rod is formed in the mounting frame, and the connecting frame drives the mounting frame to slide through the guide rod when moving; the direction of the sliding groove is set as follows: when the drill bit moves towards the direction departing from the chuck, the connecting frame drives the mounting frame to move, so that the face milling cutter moves towards the direction close to the axis of the drill bit.

Through adopting above-mentioned technical scheme, the link is ordered about when cylinder is flexible and is removed, and the link stirs the mounting bracket through the guide bar and slides, and when the mounting bracket slided along the spout, the guide bar was in the guiding hole self-adaptation slip. The movement of the connecting frame is linked with the cylinder, so that the automation is improved.

Preferably, the first driving source is a motor, and the output end of the first driving source and the first driving shaft are driven by a tension transmission belt.

Through adopting above-mentioned technical scheme, when the motor ran, the motor drove drive shaft one through the drive belt and rotates, and drive shaft one and then will rotate and transmit to drive shaft two, makes drill bit, face milling cutter all produce the rotation.

Preferably, the frame rotates and is provided with the chamfer sword, the chamfer sword is rotated by the drive of driving source two, the chamfer sword is located the chuck center, the axis and the drill bit coincidence of chamfer sword, the frame is equipped with the drive structure who orders about chamfer sword along its axial displacement.

Through adopting above-mentioned technical scheme, after the drill bit bore centre bore was accomplished, drive structure can order about the chamfer sword and remove protruding chuck, carries out the chamfer to the burr of the opposite side of centre bore, then follow-up process that need not to set up artifical chamfer.

Preferably, the driving structure is a driving rod, one end of the driving rod is connected to the piston rod end of the first cylinder, and the other end of the driving rod is connected to the chamfering tool.

By adopting the technical scheme, when the first air cylinder stretches, the first air cylinder drives the chamfering tool to move through the driving rod, so that the chamfering tool and the drill bit move synchronously along the axial direction, and a driving source or an electric control system is not required to be additionally arranged for moving the chamfering tool.

Preferably, the rack is rotatably provided with a first driven pulley and a second driven pulley, the second driving source is a motor, and the output end of the second driving source is coaxially fixed with a driving pulley; the first driven belt wheel is coaxially fixed with the chuck, and transmission is established between the first driven belt wheel and the driving belt wheel by arranging a first synchronous belt; the chamfering tool is coaxially fixed with a driving shaft III, the driving shaft III penetrates through a driven belt wheel II and is in sliding connection with the driven belt wheel II, the driving shaft III and the driven belt wheel II limit relative rotation through a key groove structure III, and rotation is established between the driven belt wheel II and a driving belt wheel through a synchronous belt II.

By adopting the technical scheme, the chamfering tool and the chuck are driven to rotate together when the driving source II operates; and meanwhile, a third key groove structure is arranged, so that the third driving shaft and the chamfering tool can be allowed to move along the axial direction of the third driving shaft.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the machine tool can simultaneously perform operations of drilling a central hole and milling an end face on the gear, and finish plane milling operation on most area of the end face while drilling the central hole on the gear, so that the production efficiency is improved;

2. the machine tool can complete the procedures of drilling a central hole, milling a plane and chamfering the reverse side together after a workpiece is clamped for one time;

3. the mounting frame and the chamfering tool of the machine tool can be automatically moved, and the automation degree is high.

Drawings

Fig. 1 is a perspective view of the embodiment.

Fig. 2 is a sectional view of the embodiment.

Fig. 3 is a partial view of the power seat side of fig. 2.

FIG. 4 is a perspective view of the interior of the power base of the embodiment.

Fig. 5 is a partial view of the chuck side of fig. 2.

Description of reference numerals: 1. a frame; 11. a chuck; 12. a power base; 2. a drill bit; 3. a face milling cutter; 21. a first cylinder; 22. a first driving shaft; 23. a first cone pulley; 24. a key groove structure I; 121. a first limiting frame; 31. a mounting frame; 311. a slide bar; 122. a chute; 32. a second air cylinder; 33. a second driving shaft; 34. a second conical pulley; 35. a second key groove structure; 312. a second limiting frame; 25. a connecting frame; 251. a guide bar; 313. a guide hole; 13. a first driving source; 131. a transmission belt; 111. a driven belt wheel I; 4. chamfering cutter; 41. a driven belt wheel II; 42. a third driving shaft; 43. a key groove structure III; 5. a drive rod; 14. a second driving source; 141. a driving pulley; 142. a first synchronous belt; 143. and a second synchronous belt.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a machine tool for milling end faces and drilling center holes. Referring to fig. 1 and 2, the machine tool for milling the end face and drilling the center hole comprises a frame 1, wherein the frame 1 is provided with a chuck 11 for clamping a workpiece and a power seat 12 opposite to the chuck 11, the power seat 12 is rotatably provided with a drill 2 and a face milling cutter 3, and the drill 2 and the face milling cutter 3 are opposite to the chuck 11.

Referring to fig. 3 and 4, a first cylinder 21 for driving the drill bit 2 to extend and retract is arranged in the power base 12, and the extending and retracting direction of the drill bit 2 is along the axial direction. The cylinder body of the first cylinder 21 is fixed on the power base 12, the piston rod end of the first cylinder 21 is rotatably connected with the first driving shaft 22, the end parts of the first driving shaft and the first driving shaft are rotatably connected in a manner of an embedded block and an embedded groove, the second driving shaft 33 is driven to slide along the axial direction when the second cylinder 32 stretches, and the piston rod of the first cylinder 21 and the first driving shaft 22 cannot move relatively along the axial direction. A first conical wheel 23 is sleeved outside the first driving shaft 22, the first driving shaft 22 penetrates through the first conical wheel 23 and is in sliding connection with the first conical wheel 23, and relative rotation is limited between the first driving shaft 22 and the first conical wheel 23 by arranging a first keyway structure 24; the inner wall of the power base 12 is fixed with a first limiting frame 121, and the first limiting frame 121 is respectively abutted against two end faces of the first cone pulley 23 so as to limit the relative movement of the first cone pulley 23 and the power base 12 along the axial direction. The drill bit 2 is coaxially fixed at the end of the driving shaft one 22, which is far away from the cylinder one 21, and the drill bit 2 is positioned outside the power seat 12.

A mounting frame 31 is arranged in the power base 12 in a sliding mode, and the mounting frame 31 is located above the first driving shaft 22. A slide bar 311 is fixed on the outer side wall of the mounting frame 31, the length direction of the slide bar 311 is inclined with the horizontal plane, and a sliding groove 122 for the slide bar 311 to be connected in a sliding manner is arranged on the inner wall of the power base 12. The slide bar 311 and the slide groove 122 are inclined in the directions of: the chute 122 extends obliquely downward in a direction away from the chuck 11.

The face milling cutter 3 is connected to the mounting frame 31, the mounting frame 31 is provided with a second cylinder 32 for driving the face milling cutter 3 to stretch, and the stretching direction of the face milling cutter 3 is along the axial direction. The cylinder body of the second cylinder 32 is fixed on the mounting frame 31, the piston rod end of the second cylinder 32 is rotatably connected with a second driving shaft 33, the end parts of the second driving shaft 33 and the second driving shaft are rotatably connected in a manner of an embedded block and an embedded groove, the second driving shaft 33 is driven to slide along the axial direction when the second cylinder 32 stretches, and the piston rod of the second cylinder 32 and the second driving shaft 33 cannot move relatively along the axial direction; the axes of the second driving shaft 33 and the first driving shaft 22 are parallel to each other. A second conical wheel 34 is sleeved outside the second driving shaft 33, the second driving shaft 33 penetrates through the second conical wheel 34 and is in sliding connection with the second conical wheel 34, and relative rotation is limited between the second driving shaft 33 and the second conical wheel 34 through a second key groove structure 35; the mounting frame 31 is fixed with a second limiting frame 312, and the second limiting frame 312 abuts against two end faces of the second cone pulley 34 respectively so as to limit the second cone pulley 34 to move relative to the mounting frame 31 along the axial direction. The face milling cutter 3 is coaxially fixed at the end part of the second driving shaft 33, which is far away from the second cylinder 32, and the face milling cutter 3 is positioned outside the power base 12.

The axes of the first conical wheel 23 and the second conical wheel 34 are parallel, the conical directions deviate from each other, and elastic materials with large static friction force, such as rubber, are fixed on the wheel surfaces of the first conical wheel 23 and the second conical wheel 34 respectively; through the arrangement of the sliding strip 311 connected to the sliding groove 122, the first conical wheel 23 and the second conical wheel 34 are tightly abutted through the wheel surface, and the first conical wheel 23 and the second conical wheel 34 are in contact through the wheel surface to establish transmission. The cone angles of the first cone wheel 23 and the second cone wheel 34 are set as follows: the contact line of the first conical pulley 23 and the second conical pulley 34 is parallel to the length direction of the slide bar 311, so that the first conical pulley 23 and the second conical pulley 34 can always keep a transmission state when the mounting rack 31 slides along the slide groove 122. The axis of the face mill 3 can be close to or away from the axis of the drill 2 when the mounting bracket 31 slides along the slide groove 122.

The connecting frame 25 is fixed on the piston rod of the first air cylinder 21, the two guide rods 251 are fixed on the connecting frame 25, the length direction of the guide rods 251 is along the vertical direction, and the mounting frame 31 is provided with guide holes 313 in sliding connection with the guide rods 251. When the first cylinder 21 expands and contracts, the connecting frame 25 is driven to move, the connecting frame 25 drives the mounting frame 31 to slide through the guide rod 251, and when the mounting frame 31 slides along the sliding chute 122, the guide rod 251 slides in the guide hole 313 in a self-adaptive manner. When the first cylinder 21 is shortened to move the drill bit 2 away from the chuck 11, the connecting frame 25 drives the mounting frame 31 to move, so that the face milling cutter 3 moves towards the direction close to the axis of the drill bit 2.

The drill 2 and the face milling cutter 3 are driven to rotate by a first driving source 13 arranged in the power base 12, and the specific structure is as follows: the first driving source 13 is a motor, and the output end of the first driving source 13 and the first driving shaft 22 are driven by a tension transmission belt 131. When the first driving source 13 runs, the first driving shaft 22 and the first cone pulley 23 are driven to rotate through the transmission belt 131, and the first cone pulley 23 drives the second cone pulley 34 to rotate synchronously. The drill bit 2 is rotated; the rotation of the second conical wheel 34 is transmitted to the second driving shaft 33 and the face milling cutter 3 through the second key groove structure 35, so that the face milling cutter 3 rotates.

Referring to fig. 1 and 2, the chuck 11 is a general three-jaw chuck, and a person can move jaws of the chuck 11 by an operation to clamp or unclamp a workpiece. The center of chuck 11 is equipped with the through-hole, and chuck 11 rotates and sets up on frame 1, and the axis of rotation of chuck 11 is its axis, and the axis of rotation of chuck 11 and drill bit 2 coincide.

Referring to fig. 2 and 5, the chuck 11 coaxially fixes a first driven pulley 111. The frame 1 is also rotatably provided with a second driven belt wheel 41, and the axis of the second driven belt wheel 41 is superposed with the chuck 11; a chamfer cutter 4 is arranged in the chuck 11, the chamfer cutter 4 is positioned in a through hole in the center of the chuck 11, the axis of the chamfer cutter 4 is overlapped with the drill bit 2, and the cutter head of the chamfer cutter 4 faces the drill bit 2. And a third driving shaft 42 is coaxially fixed on the chamfering cutter 4, the third driving shaft 42 penetrates through the central axis of the second driven pulley 41 and is in sliding connection with the second driven pulley 41, and the third driving shaft 42 and the second driven pulley 41 are limited to rotate relatively by arranging a third key groove structure 43.

The frame 1 is provided with a driving structure for driving the chamfer cutter 4 to move along the axial direction of the chamfer cutter, the driving structure is specifically a driving rod 5, one end of the driving rod 5 is fixedly connected to the piston rod end of the first air cylinder 21, and the other end of the driving rod 5 is rotatably connected to a third driving shaft 42. When the first air cylinder 21 drives the drill bit 2 to move, the chamfering tool 4 moves together with the drill bit 2 through the connection action of the driving rod 5.

A second driving source 14 is arranged in the frame 1, the second driving source 14 is used for driving the chuck 11 and the chamfering tool 4 to rotate, and the specific structure is as follows: the second driving source 14 is a motor, and a driving pulley 141 is coaxially fixed at the output end of the second driving source 14; the axis of the driving pulley 141 is parallel to the axis of the chuck 11, the driving pulley 141 is preset with a long length, and transmission is established between the first driven pulley 111 and the driving pulley 141 by arranging a first synchronous belt 142. A second synchronous belt 143 is arranged between the second driven pulley 41 and the driving pulley 141 to establish rotation; the size of the driving pulley 141 is similar to that of the second driven pulley 41, and the size of the first driven pulley 111 is much larger than that of the driving pulley 141. Because the output rotating speed of the motor is high, the second driving source 14 drives the chamfering tool 4 to rotate at a high speed and drives the chuck 11 to rotate at a slow speed when operating.

The implementation principle of the end face milling and center hole drilling machine tool in the embodiment of the application is as follows: the first air cylinder 21 is of a type capable of controlling the telescopic stroke, the first air cylinder 21 is shortened to a position where the drill bit 2 is far away from the chuck 11, and the second air cylinder 32 is shortened to a position where the face milling cutter 3 is far away from the chuck 11, at the moment, a person installs a workpiece to be machined on the chuck 11, and the end face of the workpiece completely protrudes out of the chuck 11 and a clamping jaw of the workpiece during installation; when the workpiece is installed, the shortening range of the first air cylinder 21 is controlled, so that the chamfering tool 4 is located at a position which is not contacted with the workpiece.

And then starting the first driving source 13 and the second driving source 14 for processing. When the first driving source 13 operates, the drill bit 2 and the face milling cutter 3 are driven to rotate, the first air cylinder 21 and the second air cylinder 32 are controlled to extend, the drill bit 2 is pressed to the center of the workpiece to perform a process of drilling a center hole, and the face milling cutter 3 is pressed to the end face of the workpiece to perform a process of milling the end face. At this time, the face mill 3 and the drill 2 do not overlap each other in the axial direction of the drill 2. The second driving source 14 drives the chuck 11 and the chamfer cutter 4 to rotate, the chuck 11 drives the workpiece to rotate, and the face milling cutter 3 can mill the circumferential peripheral annular region of the end face of the workpiece flat while the drill bit 2 drills.

After the center hole is drilled, the first air cylinder 21 is shortened to enable the drill bit 2 to extract a workpiece, and meanwhile, the connecting frame 25 drives the mounting frame 31 to move, so that the milling cutter moves towards the direction close to the axis of the drill bit 2. The lengths of the drill bit 2 and the face milling cutter 3 are set as follows: when the drill bit 2 is completely pulled out of the workpiece and is away from the surface of the workpiece for a certain distance, the face milling cutter 3 moves to a position where a drilled central hole orifice can be milled, at the moment, the face milling cutter 3 and the drill bit 2 are overlapped along the axial direction of the drill bit 2, but the end part of the drill bit 2 is not contacted with the face milling cutter 3; with the rotation of the chuck 11, the face mill 3 mills the middle portion of the end face of the workpiece, including the aperture position of the center hole, flat. As the drill 2 continues to be away from the workpiece, the chamfer cutter 4 is moved to a position on the back side of the central hole by the pulling of the driving rod 5, and the chamfer cutter 4 chamfers the back-side orifice of the central hole.

After the machining is finished, the first control cylinder 21 extends a little to enable the chamfering tool 4 to be separated from the workpiece, meanwhile, the second control cylinder 32 shortens, the first driving source 13 and the second driving source 14 are controlled to stop running, and then the workpiece can be blanked.

In conclusion, the machine tool can simultaneously perform operations of drilling a central hole and milling an end face on the gear, and complete plane milling operation on most area of the end face while drilling the central hole on the gear. On the other hand, the machine tool can complete the procedures of drilling a central hole, completely milling the end face and chamfering the reverse side after the workpiece is clamped once, has the advantages of high processing efficiency and high automation degree, and saves the labor amount of workers.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A machine tool for milling end faces and drilling center holes comprises a rack (1), wherein the rack (1) is provided with a chuck (11) for clamping a workpiece and a power seat (12) opposite to the chuck (11), the power seat (12) is provided with a first driving source (13), a drill bit (2) driven to rotate by the first driving source (13) and a face milling cutter (3); the method is characterized in that: the power seat (12) is provided with a first cylinder (21) for driving the drill bit (2) to stretch and a second cylinder (32) for driving the face milling cutter (3) to stretch, and the stretching directions of the drill bit (2) and the face milling cutter (3) face the chuck (11); the power seat (12) is provided with an inclined sliding groove (122), the sliding groove (122) is connected with an installation frame (31) in a sliding mode, the face milling cutter (3) is arranged on the installation frame (31), the power seat (12) is rotatably provided with a first driving shaft (22) used for driving the drill bit (2) to rotate, the drill bit (2) is fixed to the end portion, away from the first cylinder (21), of the first driving shaft (22), a first cone pulley (23) is sleeved outside the first driving shaft (22), and relative rotation is limited by the arrangement of a first key groove structure (24) between the first driving shaft (22) and the first cone pulley (23); the mounting rack (31) is rotatably provided with a second bevel wheel (34) for driving the face milling cutter (3) to rotate, the axes of the first bevel wheel (23) and the second bevel wheel (34) are parallel, the conical directions of the first bevel wheel and the second bevel wheel deviate from each other, and the first bevel wheel (23) and the second bevel wheel (34) are in transmission through wheel surface contact;

when the mounting frame (31) slides along the sliding groove (122), the first conical wheel (23) and the second conical wheel (34) keep a transmission state, and the axis of the face milling cutter (3) can be close to or far away from the axis of the drill bit (2); the frame (1) is provided with a second driving source (14) for driving the chuck (11) to rotate.

2. The end-milling and center-hole-drilling machine tool according to claim 1, characterized in that: the cylinder body of the first air cylinder (21) is fixed with the power base (12), the piston rod end of the first air cylinder (21) is rotatably connected to the first driving shaft (22), the first air cylinder (21) drives the first driving shaft (22) to slide along the axial direction of the first driving shaft when stretching, and the first driving shaft (22) penetrates through the first cone pulley (23) and is in sliding connection with the first cone pulley (23).

3. The end-milling and center-hole-drilling machine tool according to claim 1, characterized in that: the cylinder body of the second cylinder (32) is fixed on the mounting frame (31), the piston rod end of the second cylinder (32) is rotatably connected with a second driving shaft (33), the second driving shaft (33) is driven to slide along the axial direction of the second cylinder when the second cylinder (32) stretches and retracts, the second driving shaft (33) penetrates through the second cone pulley (34) and is in sliding connection with the second cone pulley (34), and the second driving shaft (33) and the second cone pulley (34) are limited to rotate relatively by arranging a second key groove structure (35); the face milling cutter (3) is fixed at the end part of the second driving shaft (33) departing from the second cylinder (32).

4. The end-milling and center-hole-drilling machine tool according to claim 1, characterized in that: a connecting frame (25) is fixed on a piston rod of the first air cylinder (21), a guide rod (251) is fixed on the connecting frame (25), a guide hole (313) in sliding connection with the guide rod (251) is formed in the mounting frame (31), and the mounting frame (31) is driven to slide through the guide rod (251) when the connecting frame (25) moves; the direction of the chute (122) is arranged as follows: when the drill bit (2) moves in the direction away from the chuck (11), the connecting frame (25) drives the mounting frame (31) to move, so that the face milling cutter (3) moves in the direction close to the axis of the drill bit (2).

5. The end-milling and center-hole-drilling machine tool according to claim 2, characterized in that: the first driving source (13) is a motor, and the output end of the first driving source (13) and the first driving shaft (22) are transmitted through a tension transmission belt (131).

6. The end-milling and center-hole-drilling machine tool according to claim 1, characterized in that: frame (1) rotates and is provided with chamfer sword (4), chamfer sword (4) are rotated by drive source two (14) drive, chamfer sword (4) are located chuck (11) center, the axis and drill bit (2) coincidence of chamfer sword (4), frame (1) is equipped with the drive structure who orders about chamfer sword (4) along its axial displacement.

7. The end-milling and center-hole-drilling machine tool according to claim 6, characterized in that: the driving structure is a driving rod (5), one end of the driving rod (5) is connected to the piston rod end of the first cylinder (21), and the other end of the driving rod (5) is connected to the chamfering tool (4).

8. The end-milling and center-hole-drilling machine tool according to claim 6, characterized in that: the rack (1) is rotatably provided with a first driven belt wheel (111) and a second driven belt wheel (41), the second driving source (14) is a motor, and the output end of the second driving source (14) is coaxially fixed with a driving belt wheel (141); the first driven pulley (111) and the chuck (11) are coaxially fixed, and transmission is established between the first driven pulley (111) and the driving pulley (141) by arranging a first synchronous belt (142); the chamfering tool (4) is coaxially fixed with a driving shaft III (42), the driving shaft III (42) penetrates through a driven pulley II (41) and is in sliding connection with the driven pulley II (41), relative rotation is limited between the driving shaft III (42) and the driven pulley II (41) through a key groove structure III (43), and rotation is established between the driven pulley II (41) and a driving pulley (141) through a synchronous belt II (143).