CN115106596A

CN115106596A - Cyclone inner milling head

Info

Publication number: CN115106596A
Application number: CN202210899359.1A
Authority: CN
Inventors: 云立恒; 卢燕
Original assignee: Jinan Ko Yo Electrical Technology Co ltd
Current assignee: Jinan Ko Yo Electrical Technology Co ltd
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2022-09-27

Abstract

The invention belongs to the field of machining tools, and particularly relates to a cyclone inner milling head; comprises a box body, a main rotating mechanism and a radial feeding mechanism; the radial feeding mechanism comprises a servo feeding motor, a small motor belt wheel, a small belt wheel and a differential feeding device; the differential feeding device comprises a small pulley gear, a small pulley gear bearing, a gear ring gear, a radial feeding gear bearing, a gear ring and a radial feeding rack; the small belt wheel gear is connected with the small belt wheel in a matched mode and is installed on the box body through a small belt wheel gear bearing, and when the small belt wheel gear works, the small belt wheel can drive the small belt wheel gear to rotate; compared with the prior art, the invention has the following advantages: (1) the differential feeding device has exquisite differential feeding concept and is easy to popularize and apply; (2) the cutter has the functions of automatic feeding and automatic avoiding along the radial direction.

Description

Cyclone inner milling head

Technical Field

The invention relates to the field of machining tools, in particular to a cyclone inner milling head.

Background

The cyclone milling is a high-speed thread milling device matched with a common lathe. A thread machining method for milling thread from workpiece by using hard alloy forming cutter installed on high-speed rotary cutter head. Because the milling speed is high (the speed reaches 400m/min), the machining efficiency is high, and compressed air is adopted for chip removal and cooling. The cutting splash such as whirlwind in the processing process is called as whirlwind milling.

After the cyclone mill is matched with a lathe, five processing movements are required to be completed in the processing process:

1. main movement: the cutter head drives the hard alloy forming cutter to rotate at a high speed;

2. auxiliary movement: the lathe spindle drives the workpiece to rotate at a low speed;

3. feeding movement: the cyclone mill moves along the axial direction of the workpiece according to the pitch or lead of the workpiece;

4. cutting movement: the cyclone mill is driven by a carriage in the lathe to move radially;

5. rotating movement: the cyclone milling machine also has the freedom degree of helix angle adjustment within a certain angle range.

Wherein the motion of whirling cutter head itself does: a main movement, a feed movement and a rotary movement.

However, the existing cyclone milling head can only machine the thread of a straight workpiece, and cannot actively avoid when machining workpieces with flanges or bending characteristics.

Disclosure of Invention

The invention aims at the problems in the prior art, and aims at designing the cyclone inner milling head so that the cyclone inner milling head can automatically feed and automatically avoid in the machining process.

In order to achieve the purpose, the invention provides a cyclone inner milling head which comprises a box body, a main rotating mechanism and a radial feeding mechanism;

the main rotating mechanism comprises a spindle motor, a motor belt pulley, a large belt pulley, a cutter head spindle, a cutter holder and a pressing plate; the spindle motor is in belt wheel driving connection with the motor; the cutter head main shaft is provided with a sliding guide rail, and the pressure plate is arranged in the sliding guide rail of the cutter head main shaft; the tool apron is arranged on the pressing plate; the cutter head spindle is arranged in the box body and can rotate around a geometric central shaft of the cutter head spindle; the large belt wheel is matched with the cutter head main shaft; the large belt wheel is in belt transmission with the motor belt wheel;

the radial feeding mechanism comprises a servo feeding motor, a small motor belt wheel, a small belt wheel and a differential feeding device; the servo feeding motor is arranged in the box body and is in belt wheel driving connection with the small motor; the small motor belt wheel is in belt transmission with the small belt wheel; the small belt wheel is connected with the tool apron through the differential feeding device, and can drive the tool apron to move along the radial feeding of the sliding guide rail when needed.

Furthermore, the main rotating mechanism also comprises a check ring, an end cover, a main shaft bearing and a rear cover; the outer ring of the main shaft bearing is matched with the box body, and the inner ring of the main shaft bearing is matched with the cutter head main shaft, so that the cutter head main shaft can rotate around the central axis of the cutter head main shaft in the box; the end cover is arranged in the box body and is used for preventing sundries in the box body from entering the bearing; the rear cover is installed in the box body and is opposite to the large belt wheel.

Further, the differential feeding device comprises a small pulley gear, a small pulley gear bearing, a gear ring gear, a radial feeding gear bearing, a gear ring, a radial feeding rack and a sliding sleeve; the small belt wheel gear is connected with the small belt wheel in an interference fit manner and is arranged on the box body through a small belt wheel gear bearing, and when the small belt wheel gear works, the small belt wheel can drive the small belt wheel gear to rotate;

the small pulley gear is meshed with the gear ring, the gear ring is sleeved on the sliding sleeve, the sliding sleeve is sleeved on the cutter head main shaft, and the gear ring can rotate around the sliding sleeve under the meshing transmission of the small pulley gear;

the gear ring gear is mounted on the cutter head spindle through the radial feeding gear bearing and is meshed with the gear ring; the gear ring gear is connected with the radial feeding gear in an interference fit manner; the radial feeding gear is meshed with the radial feeding rack; a rack groove is formed in the sliding guide rail, and the radial feeding rack (347) is mounted on the pressing plate (210) and is arranged in the rack groove; during feeding, the radial feeding gear is meshed with the radial feeding rack to drive the pressing plate to move along the sliding guide rail.

Further, when the cutting does not have the radial feeding requirement, the feeding servo motor drives the gear ring and the cutter head main shaft to synchronously rotate through a small pulley gear in a certain transmission ratio; when feeding is required, the rotating speed of the feeding servo motor can be adjusted, so that the gear ring and the cutter head spindle generate differential motion, and at the moment, the gear ring gear installed on the cutter head spindle rotates under the driving of the gear ring, so that feeding is realized.

Further, the box body is also provided with a cutter head cover, a small cover and a round cover; the cutter head cover covers the cutter head main shaft; the small cover covers the feeding servo motor; the dome is faced to the spindle motor so as to observe the operation of the spindle motor at any time.

Preferably, the sliding guide rail arranged on the cutter head main shaft is a dovetail sliding guide rail and comprises movable blocks and a square groove, the movable blocks are arranged in two groups and are arranged in the square groove in a bilateral symmetry mode, one side face of each movable block is an inclined face, and the inclined face and the bottom face of the square groove form a dovetail shape after being arranged in the square groove.

Preferably, the four sliding guide rails are uniformly arranged on the end face of the cutter head main shaft exposed outside the box body.

In summary, the cyclone inner milling head provided by the invention has the following advantages and beneficial technical effects:

1. the cyclone inner milling head provided by the invention changes the current situation that a bent part cannot be machined in the prior art;

2. the invention utilizes the feeding servo motor to drive the small belt wheel and the small belt wheel gear to drive the gear ring to synchronously rotate on the cutter head main shaft, and when feeding is needed, the rotating speed of the feeding servo motor is changed to enable the gear ring and the cutter head main shaft to generate relative rotation due to differential motion, thereby achieving the technical purpose of radial feeding, and the invention has ingenious conception and is easy to popularize and use;

3. the differential feeding device can also ensure that the cyclone inner milling head automatically avoids the characteristic of no need of processing in the workpiece when processing irregular workpieces, thereby expanding the application of the cyclone milling in numerical control processing.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a front view of a cyclone inner milling head of the present invention;

FIG. 2 is a sectional view A-A of a front view structural view of a cyclone inner milling head of the present invention;

FIG. 3 is an enlarged view of a portion of the inner cyclone milling head of the present invention at I of FIG. 2;

FIG. 4 is a perspective view of the gear engagement of the radial feed mechanism of a whirling inner cutter head of the present invention;

FIG. 5 is a schematic perspective view of a sliding guide rail of a whirlwind inner milling head according to the present invention;

FIG. 6 is a perspective view of the cutterhead spindle of the internal cyclone milling head of the present invention as installed;

FIG. 7 is a perspective view of an overall assembly view of a whirling inner cutter head of the present invention;

the reference numbers in the drawings are:

1-a box body;

2-a main rotation mechanism; 21-a spindle motor; 22-motor pulley; 23-large belt wheel; 24-a cutter head main shaft; 241-a sliding guide rail; 2411-loose piece; 2412-square groove; 2413-rack groove; 25-a tool apron; 26-a retainer ring; 27-an end cap; 28-a main shaft bearing; 29-rear cover; 210-platen

3-a radial feed mechanism; 31-a servo feed motor; 32-small motor pulley; 33-small belt wheel; 34-differential feed; 341-small pulley gear; 342-small pulley gear bearings; 343-ring gear; 344-radial feed gear; 345-radial feed gear bearing; 346-a ring gear; 347-radial feed rack; 348 — sliding sleeve;

4-cutter head cover; 5-small cover; 6-round cover.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout the drawings; the described embodiments are a subset of the inventions and not all embodiments; the embodiments and their directional terminology described below with reference to the accompanying drawings are exemplary in nature and are intended to be illustrative of the invention and should not be construed as limiting the invention; 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. Embodiments of the present invention are described in detail below with reference to the accompanying drawings:

[ example 1 ] of the present invention:

as shown in fig. 1-2, a cyclone inner milling head comprises a box body 1, a main rotating mechanism 2 and a radial feeding mechanism 3; the main rotating mechanism 2 comprises a spindle motor 21, a motor belt pulley 22, a large belt pulley 23, a cutter head spindle 24, a cutter seat 25, a retainer ring 26, an end cover 27, a spindle bearing 28, a rear cover 29 and a pressure plate 210;

as shown in fig. 1, 2 and 5, the spindle motor 21 is in driving connection with the motor pulley 22; four square grooves 2412 are formed in the cutter head main shaft 24, a rack groove 2413 is formed in the bottom surface of each square groove, and a pressure plate 210 and two movable blocks 2411 are arranged in each square groove 2412 to form a dovetail sliding guide rail 241; the tool apron 25 is mounted on the pressing plate 210; the cutter head main shaft 24 is arranged in the box body 1 and can rotate around a geometric central shaft thereof; the large belt wheel 23 is matched with the cutter head main shaft 24; the large belt wheel 23 is in belt transmission with the motor belt wheel 22;

as shown in fig. 2 and 3, the outer ring of the main shaft bearing 28 is engaged with the casing 1, and the inner ring thereof is engaged with the cutter head main shaft 24, so that the cutter head main shaft 24 can rotate around the central axis thereof in the casing 1; a retainer ring 26 is arranged on the cutter head main shaft 24 and used for fixing the position of a main shaft bearing 28 in the box body 1, and an end cover 27 is arranged in the box body 1; the rear cover 29 is mounted on the case 1 and is opposite to the large belt wheel 23;

as shown in fig. 2 and 3, the radial feed mechanism 3 includes a servo feed motor 31, a small motor pulley 32, a small pulley 33, and a differential feed device 34; the servo feed motor 31 is arranged in the box body 1, and the servo feed motor 31 is in driving connection with the small motor belt wheel 32;

as shown in fig. 2, 3 and 4, the differential feed device 34 includes a pinion gear 341, a pinion gear bearing 342, a ring gear 343, a radial feed gear 344, a radial feed gear bearing 345, a ring gear 346, a radial feed rack 347, and a sliding sleeve 248; the small belt wheel gear 341 is connected with the small belt wheel 33 in an interference fit manner, and is installed on the box body 1 through a small belt wheel gear bearing 342, and when the small belt wheel gear 341 works, the small belt wheel 33 can drive the small belt wheel gear 341 to rotate;

as shown in fig. 2, 3, 4, 5 and 6, the small pulley gear 341 is engaged with the gear ring 346, the gear ring 346 is sleeved on the sliding sleeve 248, the sliding sleeve 248 is sleeved on the cutter head spindle 24, and the gear ring 346 can rotate around the sliding sleeve 248 under the driving of the small pulley gear 341; the gear ring gear 343 is also meshed with the gear ring 346, and meanwhile, the gear ring gear 343 is mounted on the cutter head main shaft 24 through a radial feeding gear bearing 345, and the gear ring gear 343 is in interference fit connection with the radial feeding gear 344; the radial feed gear 344 is engaged with the radial feed rack 347; the radial feed rack 347 is mounted on the platen 210 and lies within the rack slot 2413; during feeding, the radial feeding gear 344 is engaged with the transmission radial feeding rack 347, so as to drive the pressing plate 210 to move along the sliding guide rail 241;

as shown in fig. 2 and 3, the box body 1 is further provided with a cutter head cover 4, a small cover 5 and a round cover 6; the cutter head cover 4 covers the cutter head main shaft 24; the small cover 5 covers the feeding servo motor 31; the dome 6 is opposed to the spindle motor 21 so as to observe the operation of the spindle motor 21 from time to time.

The working principle of the cyclone inner milling head is as follows:

the main shaft motor 21 continuously runs and drives the cutter head main shaft 24 to rotate through the transmission of the motor belt pulley 22 and the large belt pulley 23; when the cutting has no radial feeding requirement, the feeding servo motor 31 drives the gear ring 346 and the cutter head main shaft 24 to synchronously rotate through the small pulley gear 341 in a certain transmission ratio; when a feeding requirement exists, the rotation speed of the feeding servo motor 31 is adjusted, so that the gear ring 346 and the cutterhead main shaft 24 differentially rotate relatively, at the moment, the gear ring gear 343 mounted on the cutterhead main shaft 24 rotates under the driving of the gear ring 346, the gear ring gear 343 drives the radial feeding gear 344 to rotate, and the meshing of the gear rack pair drives the radial feeding rack 347 and the pressure plate 210 to move along the dovetail sliding guide rail 241, so that the radial feeding is realized.

Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A whirlwind inner milling head is characterized in that: comprises a box body (1), a main rotating mechanism (2) and a radial feeding mechanism (3);

the main rotating mechanism (2) comprises a main shaft motor (21), a motor belt wheel (22), a large belt wheel (23), a cutter head main shaft (24), a cutter seat (25) and a pressing plate (210);

the spindle motor (21) is in driving connection with the motor belt wheel (22); the cutter head spindle (24) is provided with a sliding guide rail (241), and the pressure plate (210) is installed in the sliding guide rail (241); the tool apron (25) is arranged on the pressing plate (210);

the cutter head spindle (24) is arranged in the box body (1) and can rotate around a geometric central shaft of the cutter head spindle; the large belt wheel (23) is matched with the cutter head spindle (24); the large belt wheel (23) is in belt transmission with the motor belt wheel (22);

the radial feeding mechanism (3) comprises a servo feeding motor (31), a small motor belt wheel (32), a small belt wheel (33) and a differential feeding device (34); the servo feeding motor (31) is arranged in the box body (1), and the servo feeding motor (31) is in driving connection with the small motor belt wheel (32); the small motor belt wheel (32) is in belt transmission with the small belt wheel (33); the small belt wheel (33) is connected with the tool apron (25) through the differential feeding device (34), and drives the tool apron (25) to move along the radial feeding of the sliding guide rail (241) when needed.

2. The internal cyclone milling head as set forth in claim 1, wherein: the main rotating mechanism (2) further comprises a retainer ring (26), an end cover (27), a main shaft bearing (28) and a rear cover (29); the outer ring of the main shaft bearing (28) is matched with the box body (1), and the inner ring of the main shaft bearing is matched with the cutter head main shaft (24), so that the cutter head main shaft (24) can rotate around the central axis of the cutter head main shaft in the box body (1); the retainer ring (26) is arranged on a cutter head main shaft (24) and used for fixing the position of the main shaft bearing (28) in the box body (1), and the end cover (27) is arranged in the box body (1); the rear cover (29) is mounted on the box body (1) and is opposite to the large belt wheel (23).

3. The internal cyclone milling head as set forth in claim 1, wherein: the differential feeding device (34) comprises a small belt wheel gear (341), a small belt wheel gear bearing (342), a gear ring gear (343), a radial feeding gear (344), a radial feeding gear bearing (345), a gear ring (346), a radial feeding rack (347) and a sliding sleeve (348); the small belt wheel gear (341) is connected with the small belt wheel (33) in an interference fit manner, and is installed on the box body (1) through a small belt wheel gear bearing (342), and when the small belt wheel (33) works, the small belt wheel gear (341) can be driven to rotate;

the small pulley gear (341) is meshed with the gear ring (346), the gear ring (346) is sleeved on the sliding sleeve (348), the sliding sleeve (348) is sleeved on the cutterhead main shaft (24), and the gear ring (346) can rotate around the sliding sleeve (348) under the meshing transmission of the small pulley gear (341);

the gear ring gear (343) is mounted on the cutterhead main shaft (24) through the radial feeding gear bearing (345) and is meshed with the gear ring (346); the ring gear (343) is in interference fit connection with the radial feeding gear (344); the radial feed gear (344) is in mesh with the radial feed rack (347); a rack groove (2413) is formed in the sliding guide rail (241), and the radial feeding rack (347) is installed on the pressure plate (210) and is placed in the rack groove (2413); when feeding, the radial feeding gear (344) engages with the radial feeding rack (347) to drive the pressing plate (210) to move along the sliding guide rail (241).

4. A whirling inner cutter head as claimed in claim 3, wherein: when the cutting has no radial feeding requirement, the feeding servo motor (31) drives the gear ring (346) and the cutter head main shaft (24) to synchronously rotate through a small pulley gear (341) at a certain transmission ratio; when a feeding requirement exists, the rotating speed of the feeding servo motor (31) is adjusted to enable the gear ring (346) and the cutter head spindle (24) to generate a differential motion, and at the moment, a gear ring gear (343) installed on the cutter head spindle (24) rotates under the driving of the gear ring (346), so that feeding is realized.

5. The internal cyclone milling head as set forth in claim 1, wherein: the box body (1) is also provided with a cutter head cover (4), a small cover (5) and a round cover (6); the cutter head cover (4) covers the cutter head main shaft (24); the small cover (5) covers the feeding servo motor (31); the round cover (6) is opposite to the spindle motor (21) so as to observe the operation condition of the spindle motor (21) at any time.

6. The internal cyclone milling head as set forth in claim 1, wherein: the sliding guide rail (241) arranged on the cutter head main shaft (24) is a dovetail sliding guide rail, and the sliding mechanism further comprises movable blocks (2411) and square grooves (2412), wherein the movable blocks (2411) are arranged in two groups and are symmetrically arranged in the square grooves (2412) in the left-right direction, one side surface of each movable block (2411) is arranged to be an inclined surface, and after the movable blocks are arranged in the square grooves (2412), the inclined surfaces and the bottom surfaces of the square grooves (2412) form a dovetail shape.

7. The whirling inner milling head as claimed in claim 6, characterized in that the sliding guide rails (241) are uniformly arranged on the end face of the cutterhead main shaft (24) exposed out of the box body (1), and the number of the sliding guide rails (241) is four.