CN112974904A

CN112974904A - Device and method for machining counter bore in inner wall of workpiece

Info

Publication number: CN112974904A
Application number: CN202110234387.7A
Authority: CN
Inventors: 张国政; 杨浩; 杨磊
Original assignee: Anhui Technical College of Mechanical and Electrical Engineering
Current assignee: Anhui Technical College of Mechanical and Electrical Engineering
Priority date: 2021-03-03
Filing date: 2021-03-03
Publication date: 2021-06-18
Anticipated expiration: 2041-03-03
Also published as: CN112974904B

Abstract

The invention discloses a workpiece inner wall counter bore processing device and a method, wherein the workpiece inner wall counter bore processing device comprises a base, a base is slidably arranged on the base, an installation frame is arranged on the base and can move along the vertical direction, and a driving mechanism, a drill bit mechanism and a polishing mechanism are respectively arranged on the installation frame; the drill bit mechanism comprises a drill bit seat rotatably arranged on the mounting frame, the drill bit seat is connected with a disc seat through a support, a plurality of fan-shaped drill bits can be arranged on the disc seat in a sliding mode, the fan-shaped drill bits are connected with the upper end of the support through elastic elements, the fan-shaped drill bits are spliced to form a cylindrical drill bit structure, a through hole is formed in the middle of the disc seat, the bottom of the drill bit structure is upwards sunken to form an insertion hole aligned with the through hole, a driving cylinder is fixed in the drill bit seat, and an insertion rod is coaxially connected to a piston rod of the driving cylinder. The problem that the processing and polishing of the counter sink in the workpiece are difficult at present is solved.

Description

Device and method for machining counter bore in inner wall of workpiece

Technical Field

The invention relates to the field of machining, in particular to a device and a method for machining a counter bore in the inner wall of a workpiece.

Background

The counter bore is a blind hole processed from the surface of a certain object to the inside of the object, is usually used for installing bolts or other connecting parts, and can prevent the surface of the bolts or other connecting parts from being flat. In the field of workpiece machining, the technology for machining the outer counter bore of a workpiece is mature, but for some special workpieces, the counter bore is difficult to machine in the workpiece, particularly when the counter bore is deep, a common drilling tool cannot play an effective role, and meanwhile, the inner part of the workpiece is difficult to polish and deburr after the counter bore is machined.

Therefore, the invention provides equipment and a method for processing the counter bore of the inner wall of the workpiece, which are convenient to carry out counter bore processing on the inner wall of the workpiece and can carry out effective polishing.

Disclosure of Invention

The invention aims to provide equipment and a method for machining a counter bore in the inner wall of a workpiece, which solve the problem that the machining and polishing of the counter bore in the workpiece are difficult at present.

In order to achieve the purpose, the invention provides a workpiece inner wall counter bore processing device which comprises a base, wherein the base is slidably arranged on the base, an installation frame is arranged on the base and can move along the vertical direction, and a driving mechanism, a drill bit mechanism and a polishing mechanism are respectively arranged on the installation frame, so that the driving mechanism can drive the drill bit mechanism to rotate;

drill bit mechanism is including rotationally setting up drill bit seat on the mounting bracket, drill bit seat has disc seat through the leg joint, but be provided with a plurality of fan-shaped drill bits on the disc seat with slide, fan-shaped drill bit pass through elastic element with the upper end of support is connected, and is a plurality of fan-shaped drill bit concatenation forms the drill bit structure of columnar order, the middle part of disc seat is provided with the through hole, the bottom of drill bit structure upwards sunken be formed with the jack that the through hole is aligned, drill bit seat internal fixation has driving actuating cylinder, coaxial coupling has the inserted bar on driving actuating cylinder's the piston rod, driving actuating cylinder can drive the inserted bar certainly the through hole inserts in the jack, and make fan-shaped drill bit follows the radial direction of disc seat removes.

Preferably, the elastic element comprises a shaft sleeve fixed on the support and a shaft rod fixed on the fan-shaped drill bit, at least part of the shaft rod is movably positioned in the shaft sleeve, and a return spring is sleeved on the shaft rod.

Preferably, the polishing mechanism comprises a rotating cylinder fixed on the mounting rack, a cross rod fixed on an output shaft of the rotating cylinder, a bearing fixed on the cross rod, and a polishing sleeve rotatably arranged on the bearing; the rotary cylinder can drive the polishing sleeve to be sleeved on the drill bit structure.

Preferably, the polishing sleeve comprises a first polishing sleeve and a second polishing sleeve which are communicated from top to bottom, and the diameter of the first polishing sleeve is smaller than that of the second polishing sleeve.

Preferably, a key groove is formed at the upper end of the drill bit structure, a key strip matched with the key groove is fixed on the inner top wall of the polishing sleeve, and when the polishing sleeve is sleeved on the drill bit structure, the drill bit structure can drive the polishing sleeve to rotate.

Preferably, the driving mechanism comprises a worm rotatably arranged in the mounting frame and a worm wheel sleeved on the drill bit seat, and the worm wheel and the worm are meshed.

Preferably, a first gear is coaxially fixed to the end of the worm, a driving motor is fixed to the mounting frame, a second gear meshed with the first gear is coaxially fixed to an output shaft of the driving motor, a support frame is fixed to the mounting frame, and the output shaft is rotatably arranged on the support frame.

Preferably, the base is internally fixed with a first cylinder, a piston rod of the first cylinder is connected with the mounting frame, so that the first cylinder can drive the mounting frame to move along the vertical direction, and the base is connected with the mounting frame through a plurality of telescopic rods.

Preferably, a second cylinder is fixed on the base, and a piston rod of the second cylinder is connected with the base through a connecting rod, so that the second cylinder can drive the base to extend into the workpiece;

preferably, the base is further fixed with a positioning clamp, the positioning clamp is provided with a plurality of locking screws, the edge of the workpiece is fastened with the locking screws through the positioning clamp, the base is further fixed with a supporting plate, the supporting plate is rotatably provided with a plurality of supporting wheels, and at least part of the supporting wheels are abutted to the outer wall of the workpiece.

The invention also provides a method for processing by using the equipment for processing the counter bore in the inner wall of the workpiece, which comprises the following steps:

1) placing the workpiece on a supporting wheel, and clamping the edge of the workpiece by using a positioning clamp;

2) starting the second cylinder to drive the base to extend into the workpiece;

3) starting a driving motor to enable the drill bit mechanism to rotate;

4) starting a first stroke of the first cylinder to drive the drill bit mechanism to be close to the inner wall of the workpiece, and forming an outer hole on the inner wall of the drill bit mechanism;

5) starting a driving cylinder to enable the inserted rod to be separated from the jack, and enabling the fan-shaped drill bit to be driven by the elastic element to move towards the center of the disc seat and be in butt joint with the disc seat;

6) opening a second stroke of the first cylinder to enable the drill bit mechanism to form an inner hole at the bottom of the outer hole, and finishing the processing of the counter bore;

7) and after resetting, starting the rotary cylinder to enable the polishing sleeve to be sleeved on the drill bit structure, and repeating the operation to finish the polishing of the inner hole of the counter bore.

The invention provides a workpiece inner wall counter bore processing device which comprises a base, wherein a base is arranged on the base in a sliding mode, an installation frame is arranged on the base in a movable mode along the vertical direction, and a driving mechanism, a drill bit mechanism and a polishing mechanism are arranged on the installation frame respectively, so that the driving mechanism can drive the drill bit mechanism to rotate; drill bit mechanism is including rotationally setting up drill bit seat on the mounting bracket, drill bit seat has disc seat through the leg joint, but be provided with a plurality of fan-shaped drill bits on the disc seat with slide, fan-shaped drill bit pass through elastic element with the upper end of support is connected, and is a plurality of fan-shaped drill bit concatenation forms the drill bit structure of columnar order, the middle part of disc seat is provided with the through hole, the bottom of drill bit structure upwards sunken be formed with the jack that the through hole is aligned, drill bit seat internal fixation has driving actuating cylinder, coaxial coupling has the inserted bar on driving actuating cylinder's the piston rod, driving actuating cylinder can drive the inserted bar certainly the through hole inserts in the jack, and make fan-shaped drill bit follows the radial direction of disc seat removes. During specific work, a workpiece is placed on the supporting wheel, and the edge of the workpiece is clamped and fixed by positioning; starting the second cylinder to drive the base to extend into the workpiece; starting a driving motor to enable the drill bit mechanism to rotate; starting a first stroke of the first cylinder to drive the drill bit mechanism to be close to the inner wall of the workpiece, and forming an outer hole on the inner wall of the drill bit mechanism; starting a driving cylinder to enable the inserted rod to be separated from the jack, and enabling the fan-shaped drill bit to be driven by the elastic element to move towards the center of the disc seat and be in butt joint with the disc seat; opening a second stroke of the first cylinder to enable the drill bit mechanism to form an inner hole at the bottom of the outer hole, and finishing the processing of the counter bore; and after resetting, starting the rotary cylinder to enable the polishing sleeve to be sleeved on the drill bit structure, and repeating the operation to finish the polishing of the inner hole of the counter bore. The processing equipment provided by the invention can effectively process the counter bore on the inner wall of the workpiece, and can timely perform machine type polishing operation after the processing is finished.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a block diagram of a workpiece inner wall counterbore machining apparatus provided by the present invention;

FIG. 2 is a structural diagram of a base in the apparatus for processing a counterbore in the inner wall of a workpiece according to the present invention;

FIG. 3 is a structural diagram of a drill mechanism in the apparatus for processing a counterbore in the inner wall of a workpiece provided by the invention;

FIG. 4 is an internal structural view of a drill mechanism in the apparatus for processing a counterbore in the inner wall of a workpiece according to the invention;

FIG. 5 is a structural diagram of a worm wheel and a worm in the workpiece inner wall counterbore machining device provided by the invention;

FIG. 6 is a schematic diagram of a polishing mechanism in the apparatus for processing a counterbore in the inner wall of a workpiece according to the invention.

Description of the reference numerals

1-workpiece 2-base

3-mounting frame 4-drill bit mechanism

5-polishing mechanism 6-second cylinder

7-connecting rod 8-base

9-positioning clamp 10-locking screw

11-support plate 12-support wheel

21-telescopic rod 22-first cylinder

31-drive motor 32-support frame

33-second gear 34-worm

35-first gear 36-first bearing

41-fan-shaped drill bit 42-bracket

43-elastic element 44-plunger

45-bit seat 46-second bearing

47-drive cylinder 48-disc seat

49-turbine

51-rotating cylinder 52-cross bar

53-mounting bearing 54-polishing sleeve

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

As shown in fig. 1-6, the present invention provides a workpiece inner wall counterbore processing device, which includes a base 8, wherein a base 2 is slidably disposed on the base 8, a slide rail is disposed on a surface of the base 8, a slider matched with the slide rail is disposed on a bottom surface of the base 2, so that the base 2 can slide along a length direction of the base 8, a mounting frame 3 is disposed on the base 2 in a manner of being movable along a vertical direction, and a driving mechanism, a drill mechanism 4 and a polishing mechanism 5 are respectively disposed on the mounting frame 3, so that the driving mechanism can drive the drill mechanism 4 to rotate; the drill mechanism 4 comprises a drill seat 45 rotatably arranged on the mounting frame 3, the drill seat 45 is connected with a disc seat 48 through a support 42, a plurality of fan-shaped drill bits 41 are slidably arranged on the disc seat 48, the fan-shaped drill bits 41 are preferably 4, a complete cylindrical drill bit is formed after the butt joint of 4 fan-shaped cross-section drill bits, the fan-shaped drill bits 41 are connected with the upper end of the support 42 through elastic elements 43, the fan-shaped drill bits 41 are spliced to form a cylindrical drill bit structure, a through hole is formed in the middle of the disc seat 48, a jack aligned with the through hole is formed in the bottom of the drill bit structure in an upward concave mode, a driving cylinder 47 is fixed in the drill seat 45, an insertion rod 44 is coaxially connected to a piston rod of the driving cylinder 47, and the driving cylinder 47 can drive the insertion rod 44 to be inserted into the jack from the through hole, and causes the fan bit 41 to move in the radial direction of the disc seat 48. The diameter of the plug rod is larger than that of the jack, the top of the plug rod is in a pointed shape, when the plug rod is inserted into the jack, four fan-shaped drill bits 41 are extruded to expand outwards along the radial direction of the plug rod, the plug rod is located in the jack in an initial state, the drill bit structure is in a first state at the moment, the diameter of the drill bit structure is relatively large and used for machining an outer hole of a counter bore, when the plug rod is pulled out, the fan-shaped drill bits 41 are extruded inwards under the action of the elastic element 43, the drill bits are in a second state at the moment, and the diameter of the drill bit structure is relatively small and used for machining an inner.

In a preferred embodiment of the present invention, a specific structure of the elastic element 43 is disclosed, which facilitates the resetting of the fan bit 41, wherein the elastic element 43 comprises a sleeve fixed on the support 42 and a shaft fixed on the fan bit 41, the shaft is at least partially movably located in the sleeve, and a reset spring is sleeved on the shaft.

In a preferred embodiment of the present invention, in order to facilitate polishing of the counterbore, the polishing mechanism 5 comprises a rotating cylinder 51 fixed on the mounting frame 3, a cross bar 52 fixed on an output shaft of the rotating cylinder 51, a bearing 53 fixed on the cross bar 52, and a polishing sleeve 54 rotatably arranged on the mounting bearing 53; the rotary cylinder 51 can drive the polishing sleeve 54 to be sleeved on the drill bit structure. After the counter bore is machined, a piston rod of the rotary air cylinder 51 is jacked up and drives the cross rod 52 to rotate, the piston rod contracts, so that the polishing sleeve 54 is sleeved on the drill bit structure, the polishing sleeve 54 comprises a first polishing sleeve and a second polishing sleeve which are communicated from top to bottom, and the diameter of the first polishing sleeve is smaller than that of the second polishing sleeve. The inner diameter of the first polishing sleeve is the same as the outer diameter of the drill bit structure in the second state, and the inner diameter of the second polishing sleeve is the same as the outer diameter of the drill bit structure in the first state, so that the polishing sleeve and the counter bore are matched in size.

In a preferred embodiment of the present invention, in order to enable the drill structure to smoothly drive the polishing sleeve 54 to rotate, a key groove is formed at the upper end of the drill structure (a slot is formed at the upper end of each fan-shaped drill 41, and the four slots surround to form the key groove), a key strip matching with the key groove is fixed on the inner top wall of the polishing sleeve 54, and when the polishing sleeve 54 is sleeved on the drill structure, the drill structure can drive the polishing sleeve 54 to rotate.

In a preferred embodiment of the present invention, in order to enable the drill structure to rotate smoothly, the driving mechanism includes a worm 34 rotatably disposed in the mounting frame 3, and a worm wheel 49 sleeved on the drill seat 45, wherein the worm wheel 49 and the worm 34 are engaged. Here, a first bearing 36 is fixed in the mounting frame 3, the worm 34 is at least partially rotatably engaged in the first bearing 36, a second bearing 46 is also fixed on the mounting frame 3, and the drill bit seat 45 is at least partially rotatably engaged in the second bearing 46.

In a preferred embodiment of the present invention, a first gear 35 is coaxially fixed to an end of the worm 34, a driving motor 31 is fixed to the mounting bracket 3, a second gear 33 engaged with the first gear 35 is coaxially fixed to an output shaft of the driving motor 31, a support bracket 32 is fixed to the mounting bracket 3, and the output shaft is rotatably provided on the support bracket 32.

In a preferred embodiment of the present invention, in order to enable the drill structure to smoothly drill the inner wall of the workpiece 1, a first cylinder 22 is fixed in the base 2, a piston rod of the first cylinder 22 is connected to the mounting bracket 3, so that the first cylinder 22 can drive the mounting bracket 3 to move in the vertical direction, and the base 2 and the mounting bracket 3 are further connected by a plurality of telescopic rods 21. The first cylinder 22 is provided with two sets of strokes, the distance of the first stroke is the depth of an outer hole of the counter bore, the distance of the second stroke is the depth of an inner hole of the counter bore, and the specific distance of the two sets of strokes can be set and adjusted according to the machining requirements.

In a preferred embodiment of the present invention, in order to fix the workpiece 1 conveniently, a second cylinder 6 is fixed on the base 8, and a piston rod of the second cylinder 6 is connected to the base 2 through a connecting rod 7, so that the second cylinder 6 can drive the base 2 to extend into the workpiece 1;

preferably, a positioning clamp 9 is further fixed on the base 8, a plurality of locking screws 10 are arranged on the positioning clamp 9, the edge of the workpiece 1 is fastened with the locking screws 10 through the positioning clamp 9, a supporting plate 11 is further fixed on the base 8, a plurality of supporting wheels 12 are rotatably arranged on the supporting plate 11, and at least part of the supporting wheels 12 is abutted against the outer wall of the workpiece 1.

The invention also provides a method for processing by using the equipment for processing the counter bore in the inner wall of the workpiece, which comprises the following steps: placing the workpiece 1 on the support wheel 12, and fastening the edge of the workpiece 1 by using the positioning clamp 9; the second cylinder 6 is started to drive the base 2 to extend into the workpiece 1; the driving motor 31 is started to rotate the drill bit mechanism 4, and the drill bit mechanism is in a first state (i.e. the fan-shaped drill bit 41 is in an open state); opening a first stroke of the first cylinder 22 so that the first cylinder drives the drill bit mechanism 4 to be close to the inner wall of the workpiece 1, forming an outer hole on the inner wall, and closing the driving motor 31; the driving cylinder 47 is started, so that the inserted rod 44 is separated from the inserted hole, and the fan-shaped drill bit 41 is driven by the elastic element 43 to displace towards the center of the disc seat 48 and is butted; starting the driving motor 31 and starting the second stroke of the first air cylinder 22, so that the drill bit mechanism 4 forms an inner hole at the bottom of the outer hole, and finishing the processing of the counter bore; and (3) turning off the driving motor 31, resetting the first air cylinder 22, starting the rotary air cylinder 51 after resetting, sleeving the polishing sleeve 54 on the drill bit structure, starting the driving motor 31 and the first air cylinder 22, and repeating the operations to finish the inner hole polishing of the counter bore.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims

1. The workpiece inner wall counter bore machining equipment is characterized by comprising a base (8), wherein a base (2) is slidably arranged on the base (8), a mounting frame (3) is movably arranged on the base (2) along the vertical direction, and a driving mechanism, a drill bit mechanism (4) and a polishing mechanism (5) are respectively arranged on the mounting frame (3) so that the driving mechanism can drive the drill bit mechanism (4) to rotate;

drill bit mechanism (4) is including rotationally setting up drill bit seat (45) on mounting bracket (3), drill bit seat (45) are connected with disc seat (48) through support (42), can be provided with a plurality of fan-shaped drill bits (41) on disc seat (48) with sliding, fan-shaped drill bit (41) pass through elastic element (43) with the upper end of support (42) is connected, and is a plurality of fan-shaped drill bit (41) splice forms the drill bit structure of columnar order, the middle part of disc seat (48) is provided with the through hole, the bottom of drill bit structure upwards sunken be formed with the jack that the through hole is aligned, drill bit seat (45) internal fixation has drive cylinder (47), coaxial coupling has inserted bar (44) on the piston rod of drive cylinder (47), drive cylinder (47) can drive inserted bar (44) from the through hole inserts in the jack, and moving the fan bit (41) in a radial direction of the disc seat (48).

2. The apparatus for countersinking an inner wall of a workpiece according to claim 1, wherein said resilient member (43) comprises a sleeve fixed to said holder (42) and a shaft fixed to said fan bit (41), said shaft being at least partially movably located in said sleeve, said shaft being sleeved with a return spring.

3. The workpiece inner wall counterbore processing device according to claim 2, characterized in that the polishing mechanism (5) comprises a rotating cylinder (51) fixed on the mounting frame (3), a cross bar (52) fixed on an output shaft of the rotating cylinder (51), a bearing (53) fixed on the cross bar (52), and a polishing sleeve (54) rotatably arranged on the mounting bearing (53); the rotary cylinder (51) can drive the polishing sleeve (54) to be sleeved on the drill bit structure.

4. The workpiece inner wall counterbore machining apparatus of claim 3 wherein the burnishing sleeve (54) comprises a first burnishing sleeve and a second burnishing sleeve in communication from top to bottom, the first burnishing sleeve being smaller in diameter than the second burnishing sleeve.

5. The workpiece inner wall countersink machining apparatus according to claim 4, wherein a key groove is formed at an upper end of the drill structure, a key strip matched with the key groove is fixed on an inner top wall of the polishing sleeve (54), and when the polishing sleeve (54) is sleeved on the drill structure, the drill structure can drive the polishing sleeve (54) to rotate.

6. The workpiece inner wall counterbore processing device according to claim 1, characterized in that the driving mechanism comprises a worm (34) rotatably arranged in the mounting frame (3), and a worm wheel (49) sleeved on the drill bit seat (45), wherein the worm wheel (49) and the worm (34) are meshed.

7. The workpiece inner wall countersink machining apparatus according to claim 6, wherein a first gear (35) is coaxially fixed to an end of the worm (34), a driving motor (31) is fixed to the mounting frame (3), a second gear (33) meshed with the first gear (35) is coaxially fixed to an output shaft of the driving motor (31), a support frame (32) is fixed to the mounting frame (3), and the output shaft is rotatably disposed on the support frame (32).

8. The workpiece inner wall counterbore machining device according to claim 7, characterized in that a first cylinder (22) is fixed in the base (2), a piston rod of the first cylinder (22) is connected with the mounting frame (3) so that the first cylinder (22) can drive the mounting frame (3) to move along a vertical direction, and the base (2) and the mounting frame (3) are connected through a plurality of telescopic rods (21).

9. The workpiece inner wall counterbore processing device according to claim 1, characterized in that a second cylinder (6) is fixed on the base (8), and a piston rod of the second cylinder (6) is connected with the base (2) through a connecting rod (7), so that the second cylinder (6) can drive the base (2) to extend into the workpiece (1);

preferably, still be fixed with locating clip (9) on base (8), be provided with a plurality of locking screw (10) on locating clip (9), the edge of work piece (1) passes through locating clip (9) with locking screw (10) fastening, still be fixed with backup pad (11) on base (8), rotationally be provided with a plurality of supporting wheels (12) on backup pad (11), supporting wheel (12) at least part with the outer wall of work piece (1) offsets.

10. A method for machining by using the apparatus for machining a counterbore in the inner wall of a workpiece according to any one of claims 1 to 9, comprising:

1) placing the workpiece (1) on a supporting wheel (12), and fastening the edge of the workpiece (1) by using a positioning clamp (9);

2) the second cylinder (6) is started to drive the base (2) to extend into the workpiece (1);

3) starting a driving motor (31) to enable the drill bit mechanism (4) to rotate;

4) starting a first stroke of the first cylinder (22) to enable the first cylinder to drive the drill bit mechanism (4) to be close to the inner wall of the workpiece (1), and forming an outer hole on the inner wall of the drill bit mechanism;

5) starting a driving air cylinder (47) to enable the inserted rod (44) to be separated from the insertion hole, and enabling the fan-shaped drill bit (41) to be displaced towards the center of the disc seat (48) under the driving of the elastic element (43) and be in butt joint;

6) opening a second stroke of the first cylinder (22) to enable the drill bit mechanism (4) to form an inner hole at the bottom of the outer hole, and finishing the processing of the counter bore;

7) after resetting, the rotary cylinder (51) is started to enable the polishing sleeve (54) to be sleeved on the drill bit structure, and the operation is repeated to finish the inner hole polishing of the counter bore.