CN114101730A

CN114101730A - Drilling device for high-precision machining

Info

Publication number: CN114101730A
Application number: CN202111413925.5A
Authority: CN
Inventors: 彭金银
Original assignee: Hainan University of Science and Technology
Current assignee: Hainan University of Science and Technology
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-03-01

Abstract

The invention relates to a drilling device for high-precision machining, which comprises a base, a speed reducer and a U-shaped support, wherein a screw rod is arranged on the base, a first sleeve is arranged on the screw rod, a lifting frame is arranged on the first sleeve, a rotating shaft is arranged on the lifting frame, a first passive friction wheel and a drill bit clamp are arranged on the rotating shaft, a second passive friction wheel is arranged on an input shaft of the speed reducer, the speed reducer is connected with the first sleeve through a transmission assembly, the U-shaped support is arranged on the lifting frame and provided with a compensation assembly, first sliding grooves are formed in two sides of the U-shaped support, a supporting plate is arranged in the U-shaped support, sliding blocks are arranged on two sides of the supporting plate, the support is arranged on the supporting plate and provided with a motor and a telescopic shaft, a driving bevel gear is arranged on an output shaft of the motor, and a passive bevel gear, a first driving friction wheel and a second driving friction wheel are arranged on the telescopic shaft. Effectively solved drilling equipment among the prior art and impeld the drill bit through the manpower and drill, operation intensity of labour is big, and leads to feed speed inhomogeneous easily, causes the poor scheduling problem of hole surface precision.

Description

Drilling device for high-precision machining

Technical Field

The invention belongs to the technical field of drilling devices, and particularly relates to a drilling device for high-precision machining.

Background

In the field of machining, a drilling device is often used, and the drilling device is mainly used for removing materials of plate members, pipe fittings or other special-shaped members through a drill bit and finally processing the plate members, the pipe fittings or other special-shaped members into through holes or blind holes.

Present drilling equipment drives the commentaries on classics through the motor and rotates, and rethread manpower mode drives the drill bit and impels to the realization is to the work piece drilling, therefore the problem that exists among the prior art: the mode of drilling is carried out to the propulsion drill bit through the manpower, and operation intensity of labour is big, causes the fatigue easily, and the mode of realizing feeding through artifical propulsion drill bit leads to feed speed inhomogeneous easily, causes the hole surface roughness inconsistent, and then causes the hole surface precision poor.

Content of reality

The invention aims to provide a drilling device for high-precision machining aiming at the defects of the prior art, and effectively solves the problems that the drilling device in the prior art is high in operation labor intensity and poor in hole surface precision caused by uneven feeding speed due to the fact that a drill bit is manually pushed to drill holes.

The technical scheme adopted by the invention is as follows:

a drilling device for high-precision machining comprises a base, a speed reducer and a U-shaped support, wherein a screw rod and a guide assembly are arranged on the base, a first sleeve is sleeved on the screw rod in a threaded manner, a lifting frame is arranged on the top of the first sleeve and is rotationally connected with the first sleeve, a rotating shaft is arranged on the lifting frame in a penetrating manner, a first passive friction wheel and a drill bit clamp are respectively arranged at two ends of the rotating shaft, the speed reducer is arranged on the bottom of the lifting frame, an input shaft of the speed reducer penetrates through the lifting frame and is provided with a second passive friction wheel, an output shaft of the speed reducer is connected with the first sleeve through a transmission assembly, the U-shaped support is arranged on the top of the lifting frame, a compensation assembly is arranged on the top of the U-shaped support, first sliding grooves are respectively arranged on two sides of the U-shaped support, a support plate is arranged in the U-shaped support, and the compensation device is connected with the top of the support plate, the support plate is characterized in that sliding blocks are arranged on two sides of the support plate, the sliding blocks are arranged in the first sliding grooves and matched with the first sliding grooves, a support is arranged on the bottom of the support plate, a motor and a telescopic shaft are arranged on the support, a driving bevel gear is arranged on an output shaft of the motor, a driven bevel gear is arranged in the middle of the telescopic shaft and meshed with the driving bevel gear, a first driving friction wheel and a second driving friction wheel are arranged at two ends of the telescopic shaft respectively, and the first driving friction wheel and the second driving friction wheel are abutted to the first driven friction wheel and the second driven friction wheel respectively.

Furthermore, the guide assembly comprises a guide rod, the guide rod is arranged on the base and is parallel to the screw rod, and the top of the guide rod penetrates through the lifting frame and is in sliding connection with the lifting frame.

Furthermore, the transmission assembly comprises a driving chain wheel and a driven chain wheel, the driving chain wheel is arranged on an output shaft of the speed reducer, the driven chain wheel is arranged at the bottom of the first sleeve, and the driving chain wheel is connected with the driven chain wheel through a chain.

Furthermore, the compensation assembly comprises a bolt, a spring and a second sleeve, the bolt is threaded through the top of the U-shaped support, a limit ring is arranged in the middle of the bolt, the first sleeve is arranged on the top of the support plate and aligned with the bolt, one end of the spring is sleeved on the bolt and abutted against the limit ring, and the other end of the spring is arranged in the first sleeve and abutted against the top of the support plate.

Further, the telescopic shaft comprises an inner sleeve, an outer sleeve and a first screw rod, the cross section of the inner sleeve is noncircular, one side of the inner sleeve is slidably arranged in the outer sleeve, the second driving friction wheel is arranged at the other side of the inner sleeve, a bearing seat is arranged at the end part of the outer sleeve, one side of the first screw rod is arranged in the inner sleeve and is in threaded connection with the inner sleeve, the other side of the first screw rod penetrates through the bearing seat and is connected with a bearing, a first torsion part is arranged at the end part of the first screw rod, a locking nut is arranged on the first screw rod and is in threaded connection with the first torsion part, and the locking nut is located between the bearing seat and the first torsion part.

Further, be provided with the second spout on the backup pad bottom, the support top slides and sets up in the second spout, the second screw rod is worn to be equipped with by support top screw thread, second screw rod tip passes second spout lateral wall and is connected with its bearing, be provided with the second portion of twisting on the second screw rod tip.

Furthermore, be provided with the mouth head on the crane bottom, be provided with water tank and cylinder body on the base, the cylinder body bottom is provided with inlet tube and water outlet hose, the inlet tube with the water tank is connected, water outlet hose with the nozzle is connected, be provided with into water check valve and play water check valve on inlet tube and the outlet pipe respectively, be provided with the piston in the cylinder body, be provided with the piston rod on the piston, the piston rod with the crane is connected.

Further, be provided with drilling platform on the base, be provided with travel switch on the drilling platform, be provided with on the cylinder body and open and stop switch and controller, the controller respectively with motor, travel switch, open and stop switch electric connection.

Furthermore, a third sleeve is arranged on the drilling platform, a third screw rod is arranged in the third sleeve in a threaded mode, the third sleeve extends out of the top of the third screw rod, and the travel switch is arranged on the top of the third screw rod.

Compared with the prior art, the invention has the beneficial effects that:

1. the motor passes through first initiative friction pulley, first passive friction pulley and pivot drive drill bit clamp rotate, the motor passes through second initiative friction pulley simultaneously, the passive friction pulley of second, reduction gear and drive assembly drive first sleeve screw thread rotation on the lead screw, first sleeve passes through the crane and drives drill bit clamp uniform feed, do not need the manpower to impel the drill bit to realize feeding, the intensity of labour has effectively been reduced, guarantee hole roughness's uniformity, improve hole surface accuracy, and utilize the friction pulley transmission to have overload protection function, effectively avoid the drill bit card to die the problem that leads to the motor to damage.

2. Utilize compensation assembly's design, make the bolt screw thread rotation on the U-shaped support through twisting the bolt, make the spacing ring press to the spring, the spring effort passes through the backup pad, support and telescopic shaft act on first initiative friction pulley and second initiative friction pulley, guarantee first initiative friction pulley and second initiative friction pulley respectively with the passive friction pulley of second and the good butt of the passive friction pulley of second, the friction pulley has the normal wearing and tearing back, do not need frequently to adjust the friction pulley, utilize the elasticity of spring to drive the backup pad and slide on the U-shaped support, and then compensate the friction pulley, improve the utilization ratio and the work efficiency of friction pulley.

3. By means of the design of the telescopic shaft, the first screw rod is rotated to drive the inner sleeve to slide in the outer sleeve, so that the inner sleeve drives the second driving friction wheel to slide on the end face of the second driven friction wheel, the feeding speed is adjusted, the feeding speed is suitable for workpiece requirements of different materials, the application range is expanded, and the applicability is improved.

4. Utilize the second spout, the cooperation design of U-shaped support and base, it slides in the second spout to drive the support through the second screw rod, the support drives first initiative friction pulley through the outer sleeve and slides on first passive friction pulley terminal surface, realize the regulation of cutting speed, cooperate through to cutting speed and feed rate and adjust, make the drilling setting satisfy in the needs in various material work pieces and aperture, further increase drilling equipment's suitability, and be favorable to reducing the whole roughness in hole surface, improve hole surface accuracy, and the promotion processingquality.

5. Through the cooperation design of crane and cylinder body, when drilling, utilize the crane to drive the piston and slide in the cylinder body, make the nozzle spray the cutting fluid to work piece and drill bit in succession and realize cooling and lubrication, effectively reduce the wearing and tearing of drill bit, improve drill bit life, and effectively avoid because the work piece temperature risees and lead to its dimensional change and influence the problem of hole precision.

6. Open through opening and stop the switch, open and stop the switch and to controller signals, controller control motor rotates for the crane descends and drills, and behind the crane touching travel switch, the controller received travel switch signal and control motor reversal messenger crane and rise, and the crane rises to and closes after suitable high and stops and open the switch, realizes semi-automatization drilling, effectively alleviates the operation work and moves by force, improves production efficiency, is favorable to batch production.

7. The height of the travel switch is adjusted through the third screw, so that the drilling depth is effectively controlled, and the drilling precision is favorably improved.

Drawings

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

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is an enlarged view taken at A-A in FIG. 3;

FIG. 5 is a partial schematic view of the present invention;

FIG. 6 is a schematic view of the overall structure of the first screw;

in the figure: 1. a base; 2. drilling a platform; 3. a third sleeve; 4. a third screw; 5. a travel switch; 6. a bit holder; 7. a rotating shaft; 8. a lifting frame; 9. a first passive friction wheel; 10. a first torsion portion; 11. a first screw; 12. an outer sleeve; 13. a first driving friction wheel; 14. a U-shaped bracket; 15. a bolt; 16. a support plate; 17. an inner sleeve; 18. a second driving friction wheel; 19. a second passive friction wheel; 20. a speed reducer; 21. a drive sprocket; 22. a chain; 23. a first sleeve; 24. a driven sprocket; 25. a screw rod; 26. a piston rod, 27, a cylinder; 28. a start-stop switch; 29. a controller; 30. a guide bar; 31. a water inlet pipe; 32. a water inlet one-way valve; 33. a water outlet one-way valve; 34. a water tank; 35. a water outlet hose; 36. a nozzle; 37. locking the nut; 38. a bearing seat; 39. a driven bevel gear; 40. a drive bevel gear; 41. a second torsion portion; 42. a second screw; 43. a limiting ring; 44. a spring; 45. a second sleeve; 46. a second chute; 47. a first chute; 48. a motor; 49. a support; 50. a slider; 51. a piston; 101. a left threaded section; 102. a middle polished rod section; 103. and a right thread section.

Detailed Description

In order to better understand the technical content of the invention, specific embodiments are provided below, and the invention is further described with reference to the accompanying drawings.

Referring to fig. 1 to 6, the invention provides a drilling device for high-precision processing, comprising a base 1, a speed reducer 20 and a U-shaped bracket 14, wherein a screw rod 25 and a guide assembly are vertically arranged on the base 1, a first sleeve 23 is sleeved on the screw rod 25 in a threaded manner, a lifting frame 8 is arranged on the top of the first sleeve 23, the top of the first sleeve 23 penetrates through the left side of the lifting frame 8 and is connected with a bearing of the lifting frame 8, a rotating shaft 7 vertically penetrates through the right side of the lifting frame 8 and is connected with the bearing of the lifting frame 8, a first driven friction wheel 9 and a drill bit clamp 6 are respectively arranged on the top and the bottom of the rotating shaft 7, the first driven friction wheel 9 is transversely arranged, the drill bit clamp 6 is used for clamping a drill bit, the speed reducer 20 is used for reducing the speed to enable the feeding speed to be within a proper range, the speed reducer 20 is arranged on the bottom of the lifting frame 8, an input shaft of the speed reducer 20 vertically penetrates through the lifting frame 8 and is provided with a second driven friction wheel 19, an output shaft of the speed reducer 20 is connected with the first sleeve 23 through a transmission assembly, the output shaft of the speed reducer 20 drives the first sleeve 23 to rotate on the screw rod 25 in a threaded manner, the crane 8 is limited to rotate along with the first sleeve 23 under the action of the guide assembly, the crane 8 is driven to lift when the first sleeve 23 rotates on the screw rod 25, the crane 8 drives the drill bit clamp 6 to lift through the rotating shaft 7 to realize feeding, the U-shaped support 14 is arranged on the top of the crane 8, the compensation assembly is arranged on the top of the U-shaped support 14, first sliding grooves 47 are symmetrically arranged on two sides of the U-shaped support 14, a support plate 16 is transversely arranged in the U-shaped support 14, the compensation device is connected with the top of the support plate 16, sliding blocks 50 are symmetrically arranged on two sides of the support plate 16, the sliding blocks 50 are arranged in the first sliding grooves 47 and matched with the first sliding grooves, the compensation assembly is pressed on the support plate 16 to enable the support plate 16 to slide downwards for compensation, a support 49 is vertically arranged at the bottom of the support plate 16, a motor 48 and a telescopic shaft are arranged on the support 49, the telescopic shaft is transversely arranged and is in bearing connection with the support 49, a driving bevel gear 40 is arranged on an output shaft of the motor 48, a driven bevel gear 39 is arranged in the middle of the telescopic shaft, the driven bevel gear 39 is meshed with the driving bevel gear 40, the motor 48 drives the telescopic shaft to rotate through the driving bevel gear 40 and the driven bevel gear 39, a first driving friction wheel 13 and a second driving friction wheel 18 are arranged at two side ends of the telescopic shaft, the first driving friction wheel 13 and the second driven friction wheel 18 are respectively abutted against the first driven friction wheel 9 and the second driven friction wheel 19, the telescopic shaft drives the first driven friction wheel 9 and the second driven friction wheel 19 to rotate through the first driving friction wheel 13 and the second driving friction wheel 18, the first driven friction wheel 9 can drive the drill bit clamp 6 to rotate through the rotating shaft 7 for cutting, the second driven friction wheel 19 inputs the reducer 20.

Specifically, the guide assembly comprises a guide rod 30, the guide rod 30 is arranged on the base 1 and is parallel to the screw rod 25, and the top of the guide rod 30 penetrates through the lifting frame 8 and is in sliding connection with the lifting frame. The guide rod 30 is utilized to effectively limit the lifting frame 8 to rotate, so that the lifting frame 8 is lifted on the screw rod 25 along with the first sleeve 23, the drill bit clamp 6 is fed according to a fixed track, and the drilling precision is improved.

Specifically, the transmission assembly comprises a driving sprocket 21 and a driven sprocket 24, the driving sprocket 21 is arranged on the output shaft of the reducer 20, the driven sprocket 24 is arranged on the bottom of the first sleeve 23, and the driving sprocket 21 is connected with the driven sprocket 24 through a chain 22. The output shaft of the reducer 20 is used to drive the driving sprocket 21 to rotate, the driving sprocket 21 drives the driven sprocket 24 to rotate through the chain 22, and the driven sprocket 24 drives the first sleeve 23 to rotate on the screw 25.

Specifically, the compensating assembly includes bolt 15, spring 44 and second sleeve 45, and on the bolt 15 screw thread was worn to locate U-shaped support 14 top, was provided with spacing ring 43 on the bolt 15 middle part, and first sleeve 23 sets up on the top of backup pad 16 and aligns with bolt 15, and on bolt 15 and with spacing ring 43 butt were located to spring 44 pot head, the other end setting was in first sleeve 23 and with backup pad 16 top butt. The bolt 15 is rotated on the U-shaped support 14 through the torsion bolt, the bolt 15 drives the limiting ring 43 to compress the spring 44, the spring 44 is compressed to a proper range, the acting force of the spring 44 passes through the support plate 16, the support 49 and the telescopic shaft act on the first driving friction wheel 13 and the second driving friction wheel 18, the first driving friction wheel 13 and the second driving friction wheel 18 are ensured to be respectively and well abutted against the second driven friction wheel 19 and the second driven friction wheel 19, after the friction wheels are normally worn, the support plate 16 is driven to slide on the U-shaped support 14 by the elastic force of the spring 44, the friction wheels are further compensated, the utilization rate of the friction wheels is effectively improved, the friction wheels do not need to be frequently adjusted to compensate, and the working efficiency is improved.

Specifically, the telescopic shaft comprises an inner sleeve 17, an outer sleeve 12 and a first screw rod 11, the cross section of the inner sleeve 17 is non-circular, the inner sleeve 17 is limited to rotate in the outer sleeve 12, the right side of the inner sleeve 17 is slidably arranged in the outer sleeve 12, a second driving friction wheel 18 is arranged on the left side of the inner sleeve 17, the outer sleeve 12 is arranged on the lower portion of a support 49 in a penetrating manner and is in bearing connection with the lower portion of the support 49, a bearing seat 38 is arranged on the right end of the outer sleeve 12, a first driving friction wheel 13 is arranged on the right end of the outer sleeve 12, the first screw rod 11 is provided with a left thread section 103, a middle light rod section 102 and a right thread section 101, the left thread section 103 of the first screw rod 11 is arranged in the inner sleeve 17 and is in threaded connection with the inner sleeve 17, the middle light rod section 102 of the first screw rod 11 penetrates through the bearing seat 38 and is in bearing connection with the bearing seat 38, the right end of the first screw rod 11 is provided with a first torsion portion 10, the first torsion portion 10 is used for conveniently rotating the first screw rod 11, the right thread section 103 of the first screw rod 11 is provided with the locking nut 37 and is in threaded connection with the locking nut 37, the locking nut 37 is located between the bearing seat 38 and the first torsion part 10, the locking nut 37 is used for locking the first screw rod 11 on the bearing seat 38, the first screw rod 11 is effectively prevented from loosening in the rotating process, the feeding speed after adjustment is caused to change, and the accuracy of the surface of the hole is improved. The inner sleeve 17 is driven to slide in the outer sleeve 12 by rotating the first screw rod 11, so that the inner sleeve 17 drives the second driving friction wheel 18 to slide on the end face of the second driven friction wheel 19, the distance between the connecting point of the second driving friction wheel 18 and the second driven friction wheel 19 and the axis of the second driven friction wheel 19 is changed, the rotating speed of the second driven friction wheel 19 is further changed, the feeding speed is adjusted, the feeding speed is suitable for the requirements of workpieces made of different materials, the application range is expanded, the applicability is improved, finally, the first screw rod 11 is locked through the locking nut 37, the fact that the feeding speed after adjustment is finished is unchanged is guaranteed, and the drilling precision is improved.

Specifically, the bottom of the support plate 16 is transversely provided with a second sliding groove 46, the top of the support 49 is slidably arranged in the second sliding groove 46, the top of the support 49 is threaded with a second screw rod 42, the end of the second screw rod 42 passes through the side wall of the second sliding groove 46 and is connected with the second sliding groove through a bearing, and the end of the second screw rod 42 is provided with a second torsion portion 41. The support 49 is driven to slide in the second sliding groove 46 by rotating the second screw 42, the support 49 drives the first driving friction wheel 13 to slide on the end face of the first driven friction wheel 9 through the outer sleeve 12 so as to change the rotating speed of the rotating shaft 7, the cutting speed is adjusted, the cutting speed and the feeding speed are adjusted in a matched mode, the drilling setting meets the requirements of workpieces made of different materials and the hole diameter, and the applicability of the drilling device is further improved. And through adjusting cutting speed and feed speed cooperate, effectively reduce the whole roughness of hole surface, improve and bore the surface accuracy, promote processingquality.

Specifically, a nozzle is arranged at the bottom of the lifting frame 8, a water tank 34 and a cylinder body 27 are arranged on the base 1, a water inlet pipe 31 and a water outlet hose 35 are arranged at the bottom of the cylinder body 27, the water inlet pipe 31 is connected with the water tank 34, the water outlet hose 35 is connected with a nozzle 36, a water inlet check valve 32 and a water outlet check valve 33 are respectively arranged on the water inlet pipe 31 and the water outlet pipe, a piston 51 is arranged in the cylinder body 27, a piston rod 26 is arranged on the piston 51, and the piston rod 26 is connected with the lifting frame 8. The crane 8 drives the in-process that piston 51 slided upwards through piston rod 26, the check valve 32 that intakes is opened, cutting fluid in the water tank 34 passes through in the inlet tube 31 gets into cylinder body 27, crane 8 drives the in-process that piston 51 slided downwards through piston rod 26, the check valve 33 that goes out water is opened, cutting fluid in the water tank 34 sprays through a water hose 35 flow direction nozzle 36, in order to carry out continuous cooling and lubrication to work piece and drill bit, effectively reduce the wear of drill bit, improve drill bit life, and effectively avoid leading to its dimensional change and influence the problem of hole precision because the work piece temperature risees.

Specifically, be provided with drilling platform 2 on the base 1, drilling platform 2 is used for placing the work piece, can set up clamping device on drilling platform 2 and be used for pressing from both sides tight work piece, and drilling platform 2 is prior art, does not describe here one by one, is provided with travel switch 5 on drilling platform 2, is provided with on the cylinder body 27 and opens and stop switch 28 and controller 29, and the controller is the PLC controller, controller 29 respectively with motor 48, travel switch 5, open and stop switch 28 electric connection. Through opening start stop switch 28, start stop switch 28 is to controller 29 signals, controller 29 control motor 48 rotates, make crane 8 descend and drill, after crane 8 touched travel switch 5, controller 29 received travel switch 5 signal and control motor 48 reversal, make motor 48 drive drill bit reversal and rise, crane 8 rises to and closes after suitable high start stop switch 28, realize semi-automatization drilling, effectively alleviate the operation work and move by force, and the production efficiency is improved, be favorable to batch production.

Specifically, a third sleeve 3 is arranged on the drilling platform 2, a third screw rod 4 is arranged in the third sleeve 3 through internal threads, the top of the third screw rod 4 extends out of the third sleeve 3, and a travel switch 5 is arranged on the top of the third screw rod 4. The third screw rod 4 is rotated to drive the travel switch 5 to ascend and descend, so that the height of the travel switch 5 is adjusted, the drilling depth is effectively controlled, and the drilling precision is improved.

The working principle of the invention is as follows:

when the feeding speed and the cutting speed need to be adjusted, the cross section of the inner sleeve 17 is of a non-circular structure, the inner sleeve 17 is effectively limited to rotate in the outer sleeve 12, the inner sleeve 17 is driven to slide in the outer sleeve 12 by rotating the first screw rod 11, the inner sleeve 17 drives the second driving friction wheel 18 to slide on the end face of the second driven friction wheel 19, the distance between the connecting point of the second driving friction wheel 18 and the second driven friction wheel 19 and the rotating axis of the second driven friction wheel 19 is changed, the rotating speed of the second driven friction wheel 19 is changed, the feeding speed is adjusted, the first screw rod 11 is locked by the locking nut 37, and the first screw rod 11 is prevented from loosening after adjustment is completed, so that the rotating speed of the second driven friction wheel 19 is prevented from changing. By rotating the second screw 42 and driving the support 49 to slide in the second sliding slot 46, the support 49 drives the first driving friction wheel 13 to slide on the end surface of the first driven friction wheel 9 through the outer sleeve 12, thereby changing the rotation speed of the rotating shaft 7 to realize the adjustment of the cutting speed. It should be noted that when the feeding speed and the cutting speed are adjusted, the bolt 15 may be twisted to loosen the spring 44, so as to reduce the friction force between the friction wheels, so that the twisting of the first screw 11 and the second screw 42 is more labor-saving, after the adjustment, the bolt 15 is twisted by the bolt 15 to rotate the bolt 15 on the U-shaped bracket 14, the bolt 15 drives the limit ring 43 to compress the spring 44, so that the spring 44 is compressed to a suitable range, the acting force of the spring 44 acts on the first driving friction wheel 13 and the second driving friction wheel 18 through the support plate 16 and the telescopic shaft, so as to ensure that the first driving friction wheel 13 and the second driving friction wheel 18 are in good abutment with the second driven friction wheel 19 and the second driven friction wheel 19, respectively.

When drilling is needed, the start-stop switch 28 is turned on, the start-stop switch 28 sends a signal to the controller 29, the controller 29 controls the motor 48 to rotate, the motor 48 drives the outer sleeve 12 to rotate through the driving bevel gear 40 and the driven bevel gear 39, the outer sleeve 12 drives the first driving friction wheel 13 to rotate, and the first driving friction wheel 13 drives the drill bit on the drill bit clamp 6 to rotate through the first driven friction wheel 9 and the rotating shaft 7; meanwhile, the outer sleeve 12 drives the inner sleeve 17 to rotate, the inner sleeve 17 drives the second driven friction wheel 19 to rotate through the second driving friction wheel 18, the second driven friction wheel 19 drives the first sleeve 23 to rotate on the screw rod 25 through the speed reducer 20 and the transmission assembly, the lifting frame 8 is driven to descend through the rotation of the first sleeve 23, the lifting frame 8 drives the drill bit clamp 6 to descend for drilling, the height of the travel switch 5 is adjusted through the third screw rod 4, after the drilling is completed, the front end of the lifting frame 8 touches the travel switch 5, the controller 29 receives a signal of the travel switch 5 and controls the motor 48 to rotate reversely, the motor 48 drives the drill bit to rotate reversely, the lifting frame 8 drives the drill bit to ascend through the lifting frame 8, and the start-stop switch 28 is closed after the lifting frame 8 ascends to a proper height.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a drilling equipment of high accuracy processing which characterized in that: the automatic drilling machine comprises a base, a speed reducer and a U-shaped support, wherein a screw rod and a guide assembly are arranged on the base, a first sleeve is sleeved on the screw rod in a threaded manner, a lifting frame is arranged on the top of the first sleeve and is rotationally connected with the first sleeve, a rotating shaft is arranged on the lifting frame in a penetrating manner, a first passive friction wheel and a drill bit clamp are respectively arranged at two ends of the rotating shaft, the speed reducer is arranged on the bottom of the lifting frame, an input shaft of the speed reducer penetrates through the lifting frame and is provided with a second passive friction wheel, an output shaft of the speed reducer is connected with the first sleeve through a transmission assembly, the U-shaped support is arranged on the top of the lifting frame, a compensation assembly is arranged on the top of the U-shaped support, first sliding grooves are respectively arranged at two sides of the U-shaped support, a support plate is arranged in the U-shaped support, the compensation device is connected with the top of the support plate, and sliding blocks are respectively arranged at two sides of the support plate, the sliding block is arranged in the first sliding groove and matched with the first sliding groove, a support is arranged at the bottom of the supporting plate, a motor and a telescopic shaft are arranged on the support, a driving bevel gear is arranged on an output shaft of the motor, a driven bevel gear is arranged in the middle of the telescopic shaft and meshed with the driving bevel gear, a first driving friction wheel and a second driving friction wheel are respectively arranged at two ends of the telescopic shaft, and the first driving friction wheel and the second driving friction wheel are respectively abutted to the first driven friction wheel and the second driven friction wheel.

2. A high-precision machining drilling device according to claim 1, characterized in that: the guide assembly comprises a guide rod, the guide rod is arranged on the base and is parallel to the screw rod, and the top of the guide rod penetrates through the lifting frame and is in sliding connection with the lifting frame.

3. A high-precision machining drilling device according to claim 1, characterized in that: the transmission assembly comprises a driving chain wheel and a driven chain wheel, the driving chain wheel is arranged on an output shaft of the speed reducer, the driven chain wheel is arranged on the bottom of the first sleeve, and the driving chain wheel is connected with the driven chain wheel through a chain.

4. A high-precision machining drilling device according to claim 1, characterized in that: the compensating assembly comprises a bolt, a spring and a second sleeve, the bolt is threaded through the U-shaped support top, a limiting ring is arranged on the middle of the bolt, the first sleeve is arranged on the top of the supporting plate and aligned with the bolt, one end of the spring is sleeved on the bolt and abutted against the limiting ring, and the other end of the spring is arranged in the first sleeve and abutted against the top of the supporting plate.

5. A high-precision machining drilling device according to claim 4, characterized in that: the telescopic shaft comprises an inner sleeve, an outer sleeve and a first screw rod, the cross section of the inner sleeve is noncircular, one side of the inner sleeve slides to be arranged in the outer sleeve, a second driving friction wheel is arranged at the other side of the inner sleeve, the outer sleeve penetrates through the lower part of the support and is connected with a bearing, a bearing seat is arranged at the end part of the outer sleeve, the first driving friction wheel is arranged at the end part of the outer sleeve, one side of the first screw rod is arranged in the inner sleeve and is in threaded connection with the inner sleeve, the other side of the first screw rod penetrates through the bearing, the bearing seat is connected with the bearing, a first torsion part is arranged at the end part of the first screw rod, a locking nut is arranged on the first screw rod and is in threaded connection with the first screw rod, and the locking nut is located between the bearing seat and the first torsion part.

6. A high-precision machining drilling device according to claim 5, characterized in that: be provided with the second spout on the backup pad bottom, the support top slides and sets up in the second spout, the second screw rod is worn to be equipped with by support top screw thread, second screw rod tip passes second spout lateral wall and bearing connection with it, be provided with the second portion of twisting on the second screw rod tip.

7. A high-precision machining drilling device according to claim 6, characterized in that: the automatic water supply device is characterized in that a nozzle is arranged at the bottom of the lifting frame, a water tank and a cylinder body are arranged on the base, a water inlet pipe and a water outlet hose are arranged at the bottom of the cylinder body, the water inlet pipe is connected with the water tank, the water outlet hose is connected with the nozzle, a water inlet check valve and a water outlet check valve are respectively arranged on the water inlet pipe and the water outlet pipe, a piston is arranged in the cylinder body, a piston rod is arranged on the piston, and the piston rod is connected with the lifting frame.

8. A high-precision machining drilling device according to claim 1, characterized in that: the drilling machine is characterized in that a drilling platform is arranged on the base, a travel switch is arranged on the drilling platform, a start-stop switch and a controller are arranged on the cylinder body, and the controller is electrically connected with the motor, the travel switch and the start-stop switch respectively.

9. A high-precision machining drilling device according to claim 8, characterized in that: the drilling platform is provided with a third sleeve, a third screw rod is arranged in the third sleeve in a threaded mode, the top of the third screw rod extends out of the third sleeve, and the travel switch is arranged on the top of the third screw rod.