CN113798536A

CN113798536A - Three-axis numerical control butt boring and machining process

Info

Publication number: CN113798536A
Application number: CN202111212980.8A
Authority: CN
Inventors: 王寿永
Original assignee: Shandong Yongsheng Machinery Co ltd
Current assignee: Shandong Yongsheng Machinery Co ltd
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2021-12-17
Anticipated expiration: 2041-10-19
Also published as: CN113798536B

Abstract

The invention provides a three-axis numerical control butt boring and machining process, and relates to the technical field of machine tool equipment. The three-axis numerical control butt boring machine comprises a machine body; the control box is rotatably connected to the front wall of the lathe bed through a folding arm assembly; according to the invention, the abdicating opening and the third baffle plate arranged on the side wall of the protective cover can play a role of shielding and cannot influence the lifting of the spindle box along the stand column, the first baffle plate and the second baffle plate on the front wall of the protective cover are driven by the driving motor and the flexible rack to ascend or descend without manual switching, the set limiting assembly can control the lifting stroke, when a long and thin hole is machined, the two opposite boring cutters are integrated by installing the shockproof assembly, and when the blades of the boring cutters are used for cutting, the condition of vibration is greatly reduced, and the finish degree and the size precision of the machined surface are improved.

Description

Three-axis numerical control butt boring and machining process

Technical Field

The invention relates to the technical field of machine tool equipment, in particular to a three-axis numerical control butt boring and machining process.

Background

The boring machine is a machine tool for boring the existing prefabricated holes of a workpiece by using a boring cutter, generally, the rotation of the boring cutter is a main motion, the movement of the boring cutter or the workpiece is a feeding motion, and the boring machine is mainly used for machining high-precision holes or finishing fine machining of a plurality of holes by positioning once.

The three-axis numerical control butt boring is a boring machine which is controlled by numerical control programming and has two groups of boring cutters which are arranged oppositely, and is generally used for rough boring and fine boring after clamping the same hole, the existing three-axis numerical control butt boring is generally not provided with a protective device on the front side, only an operator is required to wear goggles for protection, the temperature of scrap iron cut off in actual work is very high, the problem of scrap iron splashing and scalding is often caused, in addition, when a slender hole is machined, due to the limitation of the diameter of the hole, the cutter bar of the boring cutter must be smaller than the size of the hole, the cutter bar is easy to vibrate during machining, the machined surface is rough, and the size precision is not high.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a three-axis numerical control counter boring and machining process, which solves the problems that the traditional three-axis numerical control counter boring is not protected and the surface is rough and the size precision is not high when a slender hole is machined.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the three-axis numerical control butt boring machine comprises a machine body; the control box is rotatably connected to the front wall of the lathe bed through a folding arm assembly; the two groups of upright posts are distributed left and right and fixedly connected to the upper wall of the bed body, and the upper ends of the two groups of upright posts are connected with a top beam together; the spindle boxes are respectively connected to the front walls of the two upright posts in a sliding manner, the front walls of the two groups of upright posts are respectively provided with a vertical guide rail, and the two groups of spindle boxes are respectively connected with the two groups of upright posts in a sliding manner through the vertical guide rails; the boring shafts are arranged on the inner side walls of the two groups of spindle boxes, the opposite ends of the inner side walls of the two groups of boring shafts are fixedly connected with boring cutters, and the opposite ends of the two groups of boring cutters are provided with connectors and shockproof assemblies for preventing vibration during cutting; the upper wall of the longitudinal guide rail is connected with a lower sliding seat in a sliding manner, and the upper wall of the lower sliding seat is fixedly connected with a workbench; the protective cover is fixedly connected to the outer walls of the two groups of upright columns and the top beam and used for preventing iron chips from splashing, a side baffle assembly for enabling the spindle box to move up and down is arranged on the side wall of the protective cover, a front baffle assembly and a driving assembly for lifting the front baffle assembly are arranged on the front wall of the protective cover, and a limiting assembly for limiting the up-and-down stroke of the front baffle assembly is further arranged between the front baffle assembly and the protective cover;

and feeding mechanisms are arranged between the spindle box and the stand column, between the boring shaft and the spindle box and between the lower sliding seat and the lathe bed.

Preferably, roll over the arm subassembly and roll over the arm including rotating seat, first arm, the second of rolling over, rotate seat fixed connection and just be close to right side wall position at the lathe bed antetheca, first arm of rolling over is rotated and is connected at the seat antetheca that rotates, the second is rolled over the arm and is rotated and be connected the one end that the seat was kept away from to first arm of rolling over, the second is rolled over the one end and the control box fixed connection that the arm kept away from first arm of rolling over.

Preferably, the shockproof subassembly includes shockproof pole and two sets of dwang, and is two sets of dwang fixed connection respectively keeps away from the one end outer wall of boring cutter at two sets of connectors, the shockproof pole rotates to be connected between the relative one end of two sets of dwang.

Preferably, the side keeps off the subassembly and includes two sets of third baffles and first slide rail, the protection casing lateral wall just is located headstock about the active region be provided with the opening of stepping down, two kinds the equal fixed connection of first slide rail just is located the opening both sides of stepping down respectively at the protection casing inside wall, and is two sets of one side that first slide rail is relative all is provided with first spout, and is two sets of the equal sliding connection of third baffle is inboard at two sets of first spouts, and is two sets of both ends respectively with the inboard upper wall of opening of stepping down and headstock upper wall fixed connection about wherein a set of third baffle, and is two sets of both ends difference headstock lower wall and the inboard lower wall fixed connection of opening of stepping down in another set of third baffle.

Preferably, the front baffle assembly comprises a plurality of groups of first baffles, second baffles and two groups of second slide rails, wherein the front wall of the protective cover is provided with a product clamping window for the product to pass in and out, the second slide rails are fixedly connected to the inner front wall of the protective cover and are respectively positioned on two sides of the product clamping window, and the two groups of second slide rails are arranged on one opposite sides of the second slide rails and are respectively provided with a second chute and a plurality of groups of sliding shafts, the sliding shafts are far away from the first baffles and the outer walls of one ends of the second baffles and are respectively connected with the two groups of second chutes in a sliding mode and are respectively connected with the inner sides of the second chutes in a sliding mode and are respectively connected with the second chutes in a sliding mode through the sliding shafts, and the inner walls of the second baffles are provided with observation windows.

Preferably, the back surfaces of the multiple groups of first baffles are connected with two flexible racks together, and the upper end of the second baffle is rotatably connected with one group of the multiple groups of first baffles, wherein the group of the first baffles is arranged at the lower part of the second baffles.

Preferably, drive assembly includes two sets of motor cabinet, elevator motor, gear, and is two sets of the equal fixed connection of motor cabinet just is located two sets of second slide rail both sides respectively at the inboard antetheca of protection casing, and is two sets of elevator motor fixed connection is respectively at two sets of motor cabinet back walls, and is two sets of gear fixed connection is respectively at two sets of elevator motor and stretches out the tip of axle, and is two sets of the gear is respectively with two sets of flexible rack toothing.

Preferably, spacing subassembly includes first fixing base, first gag lever post, first travel switch, second fixing base and second gag lever post and second travel switch, first fixing base, second fixing base fixed connection respectively just are close to the lower extreme and the upper end of second baffle respectively behind two sets of second slide rails, first gag lever post, second gag lever post fixed connection respectively are at first fixing base, second fixing base rear wall, the equal fixed connection of first travel switch, second travel switch just is close to the both sides respectively at second baffle rear wall, first travel switch button is to first gag lever post, second travel switch button is towards the second gag lever post.

The machining process of the three-axis numerical control counter boring comprises the following steps:

s1, moving the workbench to the front side of the lathe bed through the control box, fixing the product through the positioning clamp, controlling the workbench to move between the two groups of upright posts and enabling the hole to be machined to be located between the two groups of boring cutters, and setting the left boring cutter for rough boring and the right boring cutter for fine boring;

s2, further, mounting a shockproof assembly on the connecting head of the fine boring cutter, enabling the shockproof assembly to penetrate through a hole to be machined, controlling the fine boring cutter to extend out through a control box until the other end of the shockproof assembly is aligned with the connecting head on the rough boring cutter, and screwing two ends of the shockproof assembly by using anti-loosening screws;

s3, further, after the boring cutter is tried to be turned through the control box and no interference is confirmed, the lifting motor is started, the lifting motor rotates to drive the gear, the gear is meshed with the flexible rack to move the flexible rack downwards to drive the first baffle and the second baffle to slide downwards along the second sliding groove on the second sliding rail until the first travel switch contacts the first limiting rod, and the lifting motor automatically stops and is locked;

s4, further, inputting a machining program through a control box, roughly boring, reserving allowance and finely boring, avoiding vibration of a boring cutter during machining through a shockproof assembly, and improving surface smoothness and machining precision;

and S5, further, after the machining is finished, controlling the lifting motor to rotate reversely, driving the gear to move the flexible rack upwards, driving the first baffle and the second baffle to slide upwards along the second sliding groove on the second sliding rail until the second travel switch contacts the second limiting rod, automatically stopping the lifting motor and locking the lifting motor, dismantling the shockproof assembly, returning the two groups of boring cutters, controlling the workbench to drive the workpiece to be dismantled after the workpiece is removed through the product clamping window, and finishing the machining.

(III) advantageous effects

The invention provides a three-axis numerical control butt boring and machining process. The method has the following beneficial effects:

1. through setting up the protection casing, can make the course of working safer, there is not iron fillings departure risk of hindering the people, the opening of stepping down and the third baffle that the protection casing lateral wall set up, can play the effect of sheltering from and can not influence the headstock and go up and down along the stand again, the first baffle and the second baffle of protection casing antetheca, it rises or descends through driving motor and flexible rack drive, do not need the manual work to go the switch, all through control box control operation, the spacing subassembly of settlement, the lift stroke of steerable second baffle, after the arrival stroke, through the rotation of the automatic stop driving motor that triggers of first travel switch and second travel switch, it is safer.

2. When small and long holes are machined, the two opposite groups of boring cutters are integrated by installing the shockproof assembly, so that the vibration of the blades of the boring cutters is greatly reduced during cutting, and the finish degree and the dimensional precision of the machined surface are improved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the overall structure of the present invention showing the raised front fender;

FIG. 3 is a schematic view of the inside structure of the present invention with the protective cover removed;

FIG. 4 is a partial structural view of the boring tool of the present invention;

FIG. 5 is a partial structural cross-sectional view of the shock assembly of the present invention;

FIG. 6 is a side view of the overall structure of the present invention;

FIG. 7 is a side view, partially in section, of a shield in accordance with the present invention;

FIG. 8 is a partial schematic view of a first slide rail according to the present invention;

FIG. 9 is a rear view of the inner structure of the shield of the present invention;

FIG. 10 is an enlarged view of a portion of the invention at A in FIG. 9;

FIG. 11 is an enlarged view of a portion of the invention at B in FIG. 9;

FIG. 12 is an enlarged view of a portion of the invention at C of FIG. 9;

FIG. 13 is a side, partially cross-sectional view of a protective cover and a second slide track attachment structure in accordance with the present invention;

FIG. 14 is a schematic view of a connection structure of a first fixing base and a first limiting rod according to the present invention;

fig. 15 is a partial schematic view of a connection structure of a first shutter and a sliding shaft according to the present invention.

Wherein, 1, a lathe bed; 2. a rotating seat; 3. a first folding arm; 4. a second folding arm; 5. a control box; 6. a longitudinal guide rail; 7. a lower slide base; 8. a work table; 9. a column; 10. a vertical guide rail; 11. a main spindle box; 12. boring a shaft; 13. boring cutter; 14. a shock-absorbing bar; 15. a top beam; 16. a protective cover; 17. a first baffle plate; 18. a second baffle; 19. an observation window; 20. a connector; 21. rotating the rod; 22. a abdication opening is formed; 23. a third baffle plate; 24. a first slide rail; 25. a first chute; 26. a second slide rail; 27. a motor base; 28. a lifting motor; 29. a gear; 30. a flexible rack; 31. a sliding shaft; 32. a first fixed seat; 33. a first limit rod; 34. a first travel switch; 35. a second fixed seat; 36. a second limiting rod; 37. a second travel switch; 38. a second chute; 39. and (5) a product clamping window.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b):

as shown in fig. 1 to 15, the embodiment of the invention provides a three-axis numerically-controlled counter-boring machine, which comprises a machine body 1; the control box 5 is rotatably connected to the front wall of the lathe bed 1 through a folding arm assembly, the folding arm assembly comprises a rotating seat 2, a first folding arm 3 and a second folding arm 4, the rotating seat 2 is fixedly connected to the front wall of the lathe bed 1 and is close to the position of the right side wall, the first folding arm 3 is rotatably connected to the front wall of the rotating seat 2, the second folding arm 4 is rotatably connected to one end, away from the rotating seat 2, of the first folding arm 3, one end, away from the first folding arm 3, of the second folding arm 4 is fixedly connected with the control box 5, and the control box 5 can conveniently move front and back, left and right through the folding arm assembly so as to be used by an operator; the two groups of upright posts 9 are distributed left and right and fixedly connected to the upper wall of the bed body 1, and the upper ends of the two groups of upright posts 9 are connected with a top beam 15 together; the spindle boxes 11 are respectively connected to the front walls of the two upright posts 9 in a sliding manner, the front walls of the two upright posts 9 are respectively provided with a vertical guide rail 10, and the two spindle boxes 11 are respectively connected with the two upright posts 9 in a sliding manner through the vertical guide rails 10; the boring shafts 12 are arranged on the inner side walls of the two groups of spindle boxes 11, the opposite ends of the inner side walls of the two groups of boring shafts 12 are fixedly connected with boring cutters 13, and the opposite ends of the two groups of boring cutters 13 are provided with connectors 20 and shockproof assemblies for preventing vibration during cutting; the longitudinal guide rail 6 is fixedly connected to the upper wall of the lathe bed 1 and positioned between the two groups of upright posts 9, the upper wall of the longitudinal guide rail 6 is connected with a lower sliding seat 7 in a sliding manner, and the upper wall of the lower sliding seat 7 is fixedly connected with a workbench 8; the protective cover 16 is fixedly connected to the outer walls of the two groups of upright posts 9 and the top beam 15 and used for preventing iron scraps from splashing, a side baffle assembly for enabling the spindle box 11 to move up and down is arranged on the side wall of the protective cover 16, a front baffle assembly and a driving assembly for lifting the front baffle assembly are arranged on the front wall of the protective cover 16, and a limiting assembly for limiting the vertical stroke of the front baffle assembly is further arranged between the front baffle assembly and the protective cover 16; feeding mechanisms are arranged between the spindle box 11 and the upright post 9, between the boring spindle 12 and the spindle box 11 and between the lower slide seat 7 and the lathe bed 1, the feeding mechanisms of the lathe are common in the market, and are not described in detail.

The shockproof assembly comprises a shockproof rod 14 and two groups of rotating rods 21, the two groups of rotating rods 21 are respectively and fixedly connected to the outer wall of one end, far away from the boring cutter 13, of the two groups of connectors 20, the shockproof rod 14 is rotatably connected between the opposite ends of the two groups of rotating rods 21, the two groups of boring cutters 13 are connected into a whole through the shockproof assembly, the occurrence of tremor is greatly reduced during processing, the surface smoothness is high, and the processing precision is good.

The side blocking component comprises two groups of third blocking plates 23 and first sliding rails 24, a yielding opening 22 is formed in the side wall of the protective cover 16 and is located in the vertical moving area of the spindle box 11, two types of first sliding rails 24 are fixedly connected to the inner side wall of the protective cover 16 and are respectively located on two sides of the yielding opening 22, first sliding grooves 25 are formed in one opposite sides of the two groups of first sliding rails 24, the two groups of third blocking plates 23 are connected to the inner sides of the two groups of first sliding grooves 25 in a sliding mode, the upper ends and the lower ends of one group of the two groups of third blocking plates 23 are fixedly connected with the inner side upper wall of the yielding opening 22 and the inner side lower wall of the spindle box 11 respectively, the side blocking component can always keep a blocking state along with the vertical movement of the spindle box 11, and the third blocking plates 23 are common organ plates for machine tools in the market.

The front baffle assembly comprises a plurality of groups of first baffles 17, second baffles 18 and two groups of second slide rails 26, a product clamping window 39 for the product to enter and exit is arranged on the front wall of the protective cover 16, the two groups of second slide rails 26 are fixedly connected to the front wall of the inner side of the protective cover 16 and are respectively positioned at two sides of the product clamping window 39, second slide grooves 38 are respectively arranged at one opposite sides of the two groups of second slide rails 26, the plurality of groups of first baffles 17 and the plurality of groups of second baffles 18 are respectively connected at the inner sides of the second slide grooves 38 in a sliding manner, the plurality of groups of first baffles 17, the both sides of second baffle 18 all are provided with sliding shaft 31, and first baffle 17, the 18 one end outer wall of second baffle are kept away from respectively with two sets of second spout 38 sliding connection to multiunit sliding shaft 31, and first baffle 17 of multiunit and second baffle 18 all pass through sliding shaft 31 and second spout 38 sliding connection, and second baffle 18 inner wall is provided with observation window 19, and when the preceding fender subassembly descends, can see the processing conditions through observation window 19.

The back of the plurality of groups of first baffles 17 is connected with two flexible racks 30 together, the upper end of the second baffle 18 is rotatably connected with one group of the plurality of groups of first baffles 17 which is arranged at the lower part through a hinge, the flexible racks 30 are made of polyacetal and have certain flexibility, and the plurality of groups of first baffles 17 can form a bent shape along the flexible racks 30.

Drive assembly includes two sets of motor cabinet 27, elevator motor 28, gear 29, the equal fixed connection of two sets of motor cabinet 27 just is located two sets of second slide rail 26 both sides respectively at the inboard antetheca of protection casing 16, two sets of elevator motor 28 are fixed connection respectively at two sets of motor cabinet 27 back walls, two sets of gear 29 are fixed connection respectively and stretch out the axle head portion at two sets of elevator motor 28, two sets of gear 29 mesh with two sets of flexible racks 30 respectively, drive gear 29 and flexible rack 30 through elevator motor 28, keep off the lift of subassembly before the control.

The limiting component comprises a first fixing seat 32, a first limiting rod 33, a first travel switch 34, a second fixing seat 35, a second limiting rod 36 and a second travel switch 37, the first fixing seat 32 and the second fixing seat 35 are respectively and fixedly connected to the rear walls of the two sets of second slide rails 26 and respectively close to the lower end and the upper end of the second baffle 18, the first limiting rod 33 and the second limiting rod 36 are respectively and fixedly connected to the first fixing seat 32 and the rear wall of the second fixing seat 35, the first travel switch 34 and the second travel switch 37 are respectively and fixedly connected to the rear wall of the second baffle 18 and respectively close to two sides, the first travel switch 34 is pressed towards the first limiting rod 33, the second travel switch 37 is pressed towards the second limiting rod 36, the lifting motor 28 automatically stops after reaching the travel.

s1, moving the workbench 8 to the front side of the lathe bed 1 through the control box 5, fixing a product through a positioning clamp, controlling the workbench 8 to move between the two groups of upright posts 9 and enabling a hole to be machined to be located between the two groups of boring cutters 13, and setting the left boring cutter 13 for rough boring and the right boring cutter 13 for fine boring;

s2, further, installing a shockproof assembly on the connector 20 of the fine boring cutter 13, enabling the shockproof assembly to penetrate through a hole to be machined, controlling the fine boring cutter 13 to extend through the control box 5 until the other end of the shockproof assembly is aligned with the connector 20 on the rough boring cutter 13, and screwing two ends of the shockproof assembly by using anti-loosening screws;

s3, further, after trial rotation of the boring cutter 13 is performed through the control box 5, and no interference is confirmed, the lifting motor 28 is started, the lifting motor 28 rotates to drive the gear 29, the gear 29 is meshed with the flexible rack 30 to move the flexible rack 30 downwards, the first baffle 17 and the second baffle 18 are driven to slide downwards along the second sliding groove 38 on the second sliding rail 26, until the first travel switch 34 contacts the first limiting rod 33, and the lifting motor 28 automatically stops and is locked;

s4, further, inputting a machining program through the control box 5, roughly boring, reserving allowance and finely boring, avoiding vibration of the boring cutter 13 during machining through a shockproof assembly, and improving surface smoothness and machining precision;

and S5, further, after the machining is finished, controlling the lifting motor 28 to rotate reversely, driving the gear 29 to move the flexible rack 30 upwards, driving the first baffle 17 and the second baffle 18 to slide upwards along the second sliding groove 38 on the second sliding rail 26 until the second travel switch 37 contacts the second limiting rod 36, automatically stopping and locking the lifting motor 28, detaching the shockproof assembly, returning the two groups of boring cutters 13, controlling the workbench 8 to drive the workpiece to be detached after being removed through the product clamping window 39, and finishing the machining.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Three-axis numerical control counter boring is characterized in that: comprises a lathe bed (1);

a control box (5) which is rotatably connected to the front wall of the lathe bed (1) through a folding arm component;

the two groups of upright posts (9) are distributed left and right and are fixedly connected to the upper wall of the bed body (1), and the upper ends of the two groups of upright posts (9) are connected with a top beam (15) together;

the spindle boxes (11) are respectively connected to the front walls of the two upright posts (9) in a sliding manner, the front walls of the two upright posts (9) are respectively provided with a vertical guide rail (10), and the two spindle boxes (11) are respectively connected with the two upright posts (9) in a sliding manner through the vertical guide rails (10);

the boring shafts (12) are arranged on the inner side walls of the two groups of spindle boxes (11), the opposite ends of the inner side walls of the two groups of boring shafts (12) are fixedly connected with boring cutters (13), and the opposite ends of the two groups of boring cutters (13) are respectively provided with a connector (20) and a shockproof assembly for preventing vibration during cutting;

the vertical guide rail (6) is fixedly connected to the upper wall of the lathe bed (1) and positioned between the two groups of upright columns (9), the upper wall of the vertical guide rail (6) is connected with a lower sliding seat (7) in a sliding manner, and the upper wall of the lower sliding seat (7) is fixedly connected with a workbench (8);

the protective cover (16) is fixedly connected to the outer walls of the two groups of upright columns (9) and the top beam (15) and used for preventing iron scraps from splashing, a side blocking assembly for enabling the spindle box (11) to move up and down is arranged on the side wall of the protective cover (16), a front blocking assembly and a driving assembly for lifting the front blocking assembly are arranged on the front wall of the protective cover (16), and a limiting assembly for limiting the up-down stroke of the front blocking assembly is further arranged between the front blocking assembly and the protective cover (16);

and feeding mechanisms are arranged between the spindle box (11) and the upright post (9), between the boring shaft (12) and the spindle box (11) and between the lower sliding seat (7) and the lathe bed (1).

2. The three-axis numerically controlled counter-boring machine of claim 1, wherein: roll over arm subassembly and roll over arm (4) including rotating seat (2), first arm (3), the second of rolling over, rotate seat (2) fixed connection and just be close to right side wall position at lathe bed (1) antetheca, first arm (3) of rolling over rotate to be connected at rotating seat (2) antetheca, the second rolls over arm (4) and rotates to be connected first arm (3) of rolling over keep away from the one end of rotating seat (2), the second rolls over arm (4) and keeps away from the one end and control box (5) fixed connection of first arm (3) of rolling over.

3. The three-axis numerically controlled counter-boring machine of claim 2, wherein: the subassembly that takes precautions against earthquakes is including taking precautions against earthquakes pole (14) and two sets of dwang (21), and is two sets of dwang (21) fixed connection is respectively kept away from the one end outer wall of boring cutter (13) at two sets of connectors (20), take precautions against earthquakes pole (14) rotate to be connected between the one end that two sets of dwang (21) are relative.

4. The three-axis numerically controlled counter-boring machine of claim 3, wherein: the side keeps off the subassembly and includes two sets of third baffles (23) and first slide rail (24), protection casing (16) lateral wall just is located headstock (11) about the region of activity be provided with opening of stepping down (22), two kinds the equal fixed connection of first slide rail (24) just is located opening of stepping down (22) both sides respectively, and is two sets of one side that first slide rail (24) is relative all is provided with first spout (25), two sets of the equal sliding connection of third baffle (23) is inboard at two sets of first spout (25), and is two sets of third baffle (23) wherein about a set of both ends respectively with opening of stepping down (22) inboard upper wall and headstock (11) upper wall fixed connection, two sets of both ends are headstock (11) lower wall respectively and opening of stepping down (22) inboard lower wall fixed connection about another group in third baffle (23).

5. The three-axis numerically controlled counter-boring machine of claim 4, wherein: the front baffle assembly comprises a plurality of groups of first baffles (17), second baffles (18) and two groups of second sliding rails (26), the front wall of the protective cover (16) is provided with a product clamping window (39) for a product to enter and exit, the second sliding rails (26) are fixedly connected to the inner front wall of the protective cover (16) and are respectively positioned on two sides of the product clamping window (39), the second sliding grooves (38) are formed in one opposite side of the second sliding rails (26), the first baffles (17) and the second baffles (18) are slidably connected to the inner side of the second sliding grooves (38), the sliding shafts (31) are arranged on two sides of the first baffles (17) and the second baffles (18), the sliding shafts (31) are arranged on the outer walls of one ends of the first baffles (17) and the second baffles (18) and are slidably connected with the two groups of second sliding grooves (38), and the first baffles (17) and the second baffles (18) are respectively connected with the second sliding grooves (38) through the sliding shafts (31) The second baffle (18) is slidably connected, and an observation window (19) is arranged on the inner wall of the second baffle.

6. The three-axis numerically controlled counter-boring machine of claim 5, wherein: the back of the first baffles (17) is connected with two flexible racks (30), and the upper end of the second baffle (18) is rotatably connected with one of the lower baffles (17) through a hinge.

7. The three-axis numerically controlled counter-boring machine of claim 6, wherein: drive assembly includes two sets of motor cabinet (27), elevator motor (28), gear (29), and is two sets of equal fixed connection of motor cabinet (27) just is located two sets of second slide rail (26) both sides respectively at protection casing (16) inboard antetheca, and is two sets of elevator motor (28) fixed connection is respectively at wall behind two sets of motor cabinet (27), and is two sets of gear (29) fixed connection is respectively and stretches out the axle head portion at two sets of elevator motor (28), and is two sets of gear (29) mesh with two sets of flexible rack (30) respectively.

8. The three-axis numerically controlled counter-boring machine of claim 7, wherein: the limiting component comprises a first fixed seat (32), a first limiting rod (33), a first travel switch (34), a second fixed seat (35), a second limiting rod (36) and a second travel switch (37), the first fixed seat (32) and the second fixed seat (35) are respectively and fixedly connected with the rear walls of the two groups of second slide rails (26) and are respectively close to the lower end and the upper end of the second baffle (18), the first limiting rod (33) and the second limiting rod (36) are respectively and fixedly connected with the rear walls of the first fixing seat (32) and the second fixing seat (35), the first travel switch (34) and the second travel switch (37) are both fixedly connected to the rear wall of the second baffle plate (18) and respectively close to the two sides, the first travel switch (34) button faces the first limiting rod (33), and the second travel switch (37) button faces the second limiting rod (36).

9. The machining process of the three-axis numerical control butt boring is characterized by comprising the following steps of: the processing technology comprises the following steps:

s1, moving the workbench (8) to the front side of the lathe bed (1) through the control box (5), fixing a product through a positioning clamp, controlling the workbench (8) to move between two groups of upright posts (9) and enabling a hole to be machined to be located between two groups of boring cutters (13), setting the left boring cutter (13) for rough boring and the right boring cutter (13) for fine boring;

s2, further, installing a shockproof assembly on the connector (20) of the fine boring cutter (13), enabling the shockproof assembly to penetrate through a hole to be machined, controlling the fine boring cutter (13) to extend through the control box (5) until the other end of the shockproof assembly is aligned with the connector (20) on the rough boring cutter (13), and screwing two ends of the shockproof assembly by using anti-loosening screws;

s3, further, after the boring cutter (13) is tried to be rotated through the control box (5) and no interference is confirmed, the lifting motor (28) is started, the lifting motor (28) rotates to drive the gear (29), the gear (29) is meshed with the flexible rack (30) to move the flexible rack (30) downwards, the first baffle (17) and the second baffle (18) are driven to slide downwards along the second sliding groove (38) in the second sliding rail (26) until the first travel switch (34) contacts the first limiting rod (33), and the lifting motor (28) automatically stops and is locked;

s4, further, inputting a machining program through the control box (5), roughly boring, reserving allowance and finely boring, avoiding vibration of a boring cutter (13) during machining through a shockproof assembly, and improving surface smoothness and machining precision;

s5, furthermore, after the machining is finished, the lifting motor (28) is controlled to rotate reversely, the gear (29) is driven to move the flexible rack (30) upwards, the first baffle (17) is driven, the second baffle (18) slides upwards along the second sliding groove (38) in the second sliding rail (26), until the second travel switch (37) contacts the second limiting rod (36), the lifting motor (28) stops automatically and is locked, the shockproof assembly is disassembled, the two groups of boring cutters (13) return, the workbench (8) is controlled to drive the workpiece to be disassembled after being removed through the product clamping window (39), and the machining is finished.