CN210817630U

CN210817630U - Column milling cutter of processing PCB board

Info

Publication number: CN210817630U
Application number: CN201921782440.1U
Authority: CN
Inventors: 刘红城; 陈伟洪; 杨莉; 曹竞赛
Original assignee: Shenzhen Yueniu Technology Co ltd
Current assignee: Shenzhen Yueniu Technology Co ltd
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2020-06-23
Anticipated expiration: 2029-10-22

Abstract

The utility model discloses a column milling cutter of processing PCB board, its technical scheme main points are: including blade and the spliced pole of being connected with the blade, the coaxial mounting hole that runs through of spliced pole terminal surface, blade outer wall and the laminating of mounting hole inner wall, the blade is kept away from the one end of its tool bit and is arranged in the mounting hole, set up pitch equal and revolve to opposite first thread groove and second thread groove in the mounting hole, the screw thread of first thread groove revolves to the same with the groove of bits of blade revolve to, the coaxial mounting block that is fixed with of terminal surface that its tool bit was kept away from to the blade, just it and first thread groove screw-thread fit are arranged in the mounting hole to the mounting block, it has the stopper still threaded connection in the mounting hole, stopper and second thread groove screw-thread fit, the terminal surface butt of blade is kept away from to the stopper and mounting block. The cutter head can be machined out of the cutter body again after the cutter head of the cutter body is broken, the length of the cutter body, which extends out of the mounting hole, is adjusted, so that the milling cutter can be continuously used, the whole milling cutter does not need to be replaced at the moment, and the cost is reduced.

Description

Column milling cutter of processing PCB board

Technical Field

The utility model belongs to the lathe annex, more specifically say, it relates to a column milling cutter of processing PCB board.

Background

Under the trend of electronic products to be light, thin, short and small, the volumes of various electronic products are gradually reduced, the manufacturing and processing processes of various parts inside the electronic products are relatively more and more delicate, and a general Printed Circuit Board (PCB) is an indispensable element of the electronic products, and the volume of the printed circuit board must be reduced along with the volume of the electronic products.

Milling cutters are the requisite cutting tools in the manufacture of printed circuit substrates. The milling cutter and the printed circuit substrate are in a high-speed running high-temperature friction environment, the cutter point of the milling cutter is easy to be lost when the milling cutter is contacted with the printed circuit substrate, the traditional method is to scrap the whole milling cutter as a waste product, and buy a new milling cutter again.

And a large amount of resources are wasted by directly replacing the milling cutter, and the production cost is higher.

Therefore, a new technical solution is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a column milling cutter of processing PCB board, after the tool bit rupture of blade or damage, reprocess out the tool bit on the blade, later shift out the blade from the mounting hole required length, make milling cutter can continue to use, no longer need change milling cutter reduce cost.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a column milling cutter of processing PCB board, includes blade and the spliced pole of being connected with the blade, the coaxial penetration of spliced pole terminal surface has the mounting hole, blade outer wall and the laminating of mounting hole inner wall, the blade is kept away from the one end of its tool bit and is arranged in the mounting hole, set up pitch in the mounting hole and equal and revolve to opposite first thread groove and second thread groove, the screw thread of first thread groove revolves to the same with the groove of chip of blade soon, the coaxial mounting block that is fixed with of terminal surface that its tool bit was kept away from to the blade, and just its and first thread groove screw-thread fit in the mounting hole are arranged in to the mounting block, it has the stopper to go back threaded connection in the mounting hole, stopper and second thread groove screw-thread fit, the terminal surface butt of blade is kept away from to the stopper and mounting block.

Through adopting above-mentioned technical scheme, after the tool bit fracture of blade, the one end of keeping away from the spliced pole at the blade has reprocessed the tool bit, later with the direction removal of blade orientation away from the spliced pole, makes the blade reach the length that can process the work piece, no longer need change whole milling cutter after the tool bit of blade damages this moment, the cost is reduced.

The utility model discloses further set up to: a plurality of spacing grooves have been seted up to stopper lateral wall circumference, equal threaded connection has stop screw in the spacing groove, stop screw can sink into the spacing inslot completely, the spliced pole lateral wall has a plurality of waist type grooves along its axial penetration, stop screw keeps away from the one end of stopper axis and inserts and arrange in waist type groove.

Through adopting above-mentioned technical scheme, after the position of stopper is confirmed, rotate limit screw and with its part of screwing out from the spacing inslot, utilize the cooperation of waist type groove and stopper to restrict the rotation of stopper, make the relative position of stopper and spliced pole difficult change to make milling cutter's use be difficult for receiving the influence.

The utility model discloses further set up to: the utility model discloses a knife blade, including spliced pole, installation cover, butt piece, installation cover inner wall fixedly connected with butt piece, the spliced pole is close to the terminal surface coaxial coupling of the tool bit of blade has the installation cover, the blade passes in the installation cover, the butt piece is close to the one end of installation cover axis and the chip groove bottom surface butt of blade.

Through adopting above-mentioned technical scheme, utilize the butt piece to restrict the position of blade, the cutting edge of blade is difficult for receiving the pressure that the mounting hole was exerted, makes the difficult production of cutting edge of blade damaged.

The utility model discloses further set up to: the butt joint piece is spiral setting, and the helix of first thread groove and the coincidence of the helix of butt joint piece, the helix of a chip groove of blade and the coincidence of the helix of first thread groove.

Through adopting above-mentioned technical scheme, utilize first helicla flute to lead the removal and the rotation of blade, make the butt joint piece can not direct and the cutting edge contact of blade to make the blade difficult the emergence of cutting edge when installing in the mounting hole damage.

The utility model discloses further set up to: the axial length of the connecting column is greater than that of the knife body.

Through adopting above-mentioned technical scheme, its removal can receive the direction of direction thread groove when the blade does not contact with the butt piece, and the cutting edge of blade can not direct and butt piece contact to the difficult condition of taking place the cutting edge damage of blade.

The utility model discloses further set up to: the limiting block is provided with a rotating groove at the end face far away from the mounting block.

By adopting the technical scheme, when the limiting block is completely sunk into the mounting hole, the use of the limiting block cannot be influenced.

The utility model discloses further set up to: the wedge-shaped surface is arranged at the position, far away from the mounting sleeve, of the inner wall of the mounting hole, and one end, close to the axis of the connecting column, of the wedge-shaped surface inclines towards the direction of the cutter body.

Through adopting above-mentioned technical scheme, utilize the wedge face to increase the open-ended area of mounting hole to make the blade change insert in the mounting hole, make the installation of blade more convenient.

The utility model discloses further set up to: a plurality of locating holes are circumferentially formed in the side wall of the mounting block, locating screws are connected in the locating holes in a threaded mode, and one ends, far away from the axis of the connecting columns, of the locating screws are inserted into the waist-shaped grooves.

Through adopting above-mentioned technical scheme, utilize the set screw to restrict the rotation of installing the piece, make the difficult rotation that takes place towards the installation cover direction of installation piece to make milling cutter's use more stable.

To sum up, the utility model discloses following beneficial effect has:

1. the cutter head can be machined again after the cutter head of the cutter body is broken, and then the length of the cutter body extending out of the mounting hole is adjusted, so that the milling cutter can be continuously used, the whole milling cutter does not need to be replaced at the moment, and the cost is reduced;

2. utilize and install the stopper of piece screw thread rotation direction difference and inject the position of installing the piece, make the blade can not take place to rotate when using to make milling cutter's use more stable.

Drawings

FIG. 1 is a perspective view of the present embodiment;

FIG. 2 is a schematic view illustrating an internal structure of a mounting groove according to the present embodiment;

fig. 3 is an enlarged view of a portion a of fig. 2.

Description of the drawings: 1. a blade body; 11. mounting blocks; 111. positioning holes; 12. positioning a screw rod; 2. connecting columns; 21. mounting holes; 22. a first thread groove; 23. a second thread groove; 24. a waist-shaped groove; 25. a wedge-shaped surface; 3. a limiting block; 31. a limiting groove; 32. a limit screw; 33. a rotating groove; 4. installing a sleeve; 41. and a butt joint block.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

A column milling cutter for processing a PCB (printed Circuit Board) comprises a cutter body 1 and a connecting column 2 connected with the cutter body 1, wherein a mounting hole 21 coaxially penetrates through the end surface of the connecting column 2, one end of the cutter body 1, far away from a cutter head, is arranged in the mounting hole 21, and the outer wall of the cutter body 1 is attached to the inner wall of the mounting hole 21. As shown in fig. 2, two first thread grooves 22 and two second thread grooves 23 with equal thread pitches and opposite screwing directions are formed in the mounting hole 21, and the screwing direction of the first thread groove 22 is the same as that of the chip groove of the blade 1. The end face of the knife body 1 far away from the knife head is coaxially welded with a mounting block 11, the mounting block 11 is arranged in the mounting hole 21, and the mounting block 11 is in threaded fit with the first thread groove 22. Still threaded connection has stopper 3 in the mounting hole 21, stopper 3 and the 23 screw-thread fit of second thread groove, and stopper 3 is close to the terminal surface of blade 1 and the terminal surface butt of blade 1 is kept away from to installation piece 11. After the tool bit of blade 1 breaks, the one end of keeping away from spliced pole 2 at blade 1 reprocesses out the tool bit, later remove blade 1 towards the direction of keeping away from spliced pole 2, make blade 1 reach the length that can process the work piece, no longer need change whole root milling cutter after blade 1's tool bit damages this moment, the cost is reduced, make installation piece 11 and first thread groove 22 be connected after placing blade 1 in the connecting hole in, later in with stopper 3 screw in mounting hole 21, make stopper 3 and installation piece 11 butt, utilize the rotation of stopper 3 restriction installation piece 11, thereby the relative position between blade 1 and spliced pole 2 is difficult for taking place to change in milling cutter use, make milling cutter's use more stable.

As shown in fig. 2, in order to determine the position of the stopper 3, the relative position between the stopper 3 and the connecting column 2 is not easy to change, six limiting grooves 31 are circumferentially formed in the side wall of the stopper 3, the axis of each limiting groove 31 passes through the axis of the stopper 3, a limiting screw 32 is in threaded connection with the inside of each limiting groove 31, and the limiting screw 32 can completely sink into the corresponding limiting groove 31. The side wall of the connecting column 2 is penetrated with a plurality of waist-shaped grooves 24 along the axis direction, and one end of the limiting screw 32 far away from the axis of the limiting block 3 can be inserted into the waist-shaped grooves 24. After the position of stopper 3 is confirmed, rotate limit screw 32 and with its part of screwing out from spacing groove 31, utilize waist-shaped groove 24 and stopper 3's cooperation to restrict stopper 3's rotation, make the relative position of stopper 3 and spliced pole 2 difficult change to make milling cutter's use be difficult for receiving the influence.

As shown in fig. 3, when the milling cutter is used, the outer wall of the cutter body 1 is pressed by the inner wall of the mounting hole 21, and the cutting edge of the cutter body 1 is damaged due to the excessive pressure applied to the cutter body 1. Therefore, the mounting sleeve 4 is coaxially welded on the end face of the connecting column 2 close to the cutter head of the cutter body 1, the cutter body 1 penetrates through the mounting sleeve 4, and the outer wall of the cutter body 1 is attached to the inner wall of the mounting sleeve 4. The inner wall of the mounting sleeve 4 is integrally formed with a butting block 41, and one end of the butting block 41 close to the axis of the mounting sleeve 4 is butted against the groove bottom of a chip groove of the cutter body 1. At this time, the position of the blade 1 is restricted by the abutment block 41, and the cutting edge of the blade 1 is less likely to receive the pressure applied from the mounting hole 21, so that the cutting edge of the blade 1 is less likely to be damaged.

As shown in fig. 3, since the cutter body 1 needs to be rotated when the abutment block 41 is placed in the chip groove of the cutter body 1, it is difficult to control the rotation angle of the cutter body 1 and the distance of movement in the axial direction thereof, and the cutter body 1 is likely to have a cutting edge which collides with the abutment block 41 and is damaged. The abutment block 41 is thus arranged helically, the helix of the first thread groove 22 coinciding with the helix of the abutment block 41, and the helix of one flute of the blade 1 coinciding with the helix of the first thread groove 22. At this time, the first spiral groove guides the movement and rotation of the blade 1, so that the abutting block 41 does not directly contact with the cutting edge of the blade 1, and the cutting edge is not easily damaged when the blade 1 is mounted in the mounting hole 21.

As shown in fig. 2, in order to make the blade 1 not contact with the mounting sleeve 4, the mounting block 11 can be connected with the connecting column 2, the axial length of the connecting column 2 is greater than that of the blade 1, and at this time, when the blade 1 does not contact with the abutting block 41, the movement of the blade can be guided by the guiding thread groove, and the cutting edge of the blade 1 does not directly contact with the abutting block 41, so that the situation that the cutting edge of the blade 1 is damaged is not easy to occur.

As shown in fig. 2, the stopper 3 can still be rotated after the stopper 3 completely enters the mounting hole 21. The end face of the limiting block 3 far away from the mounting block 11 is provided with a regular hexagon-shaped rotating groove 33, an inner hexagon wrench can be inserted into the rotating groove 33 to drive the limiting block 3 to rotate, and at the moment, when the limiting block 3 is completely sunk into the mounting hole 21, the use of the limiting block 3 cannot be influenced.

As shown in fig. 2, in order to facilitate the process of inserting the blade 1 into the mounting hole 21, a wedge-shaped surface 25 is disposed on the inner wall of the mounting hole 21 at a position away from the mounting sleeve 4, and one end of the wedge-shaped surface 25 close to the axis of the connecting column 2 is inclined toward the blade 1. The wedge-shaped surface 25 is used for increasing the area of the opening of the mounting hole 21, so that the cutter body 1 can be easily inserted into the mounting hole 21, and the installation of the cutter body 1 is more convenient.

As shown in fig. 2, since the movement of the mounting block 11 toward the mounting sleeve 4 is not limited, the blade 1 can still rotate when being stressed. Therefore, six positioning holes 111 are circumferentially formed in the side wall of the mounting block 11, and the axes of the positioning holes 111 intersect with the axis of the mounting block 11. The positioning holes 111 are all connected with positioning screws 12 in a threaded manner, one ends of the positioning screws 12 far away from the axis of the mounting block 11 are inserted into the waist-shaped grooves 24, and the positioning screws 12 can completely sink into the positioning grooves. The positioning screw 12 is used for limiting the rotation of the mounting block 11, so that the mounting block 11 is not easy to rotate towards the direction of the mounting sleeve 4, and the using process of the milling cutter is more stable.

The working principle is as follows:

after the tool bit at blade 1 takes place to break or damage, reprocess out the tool bit with blade 1, later with stop screw 32 and positioning screw 12 screw in spacing groove 31 and constant head tank respectively, rotate blade 1 and make it move towards the direction of keeping away from mounting hole 21 mutually, rotate stopper 3 after reaching the length that needs, make stopper 3 and installation piece 11 butt, rotate stop screw 32 and positioning screw 12 respectively this moment, make both keep away from the one end of spliced pole 2 axis and insert in the waist type groove 24.

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

Claims

1. The utility model provides a column milling cutter of processing PCB board, includes blade (1) and spliced pole (2) of being connected with blade (1), its characterized in that: the end face of the connecting column (2) coaxially penetrates through a mounting hole (21), the outer wall of the knife body (1) is attached to the inner wall of the mounting hole (21), one end of the knife body (1) far away from the knife head is arranged in a mounting hole (21), a first thread groove (22) and a second thread groove (23) which have the same thread pitch and opposite screwing directions are arranged in the mounting hole (21), the thread turning direction of the first thread groove (22) is the same as the turning direction of the chip groove of the knife body (1), the end surface of the knife body (1) far away from the knife head is coaxially fixed with a mounting block (11), the mounting block (11) is arranged in the mounting hole and is in threaded fit with the first thread groove (22), a limiting block (3) is further connected in the mounting hole (21) in a threaded manner, the limiting block (3) is in threaded fit with the second thread groove (23), the limiting block (3) is abutted against the end face, far away from the knife body (1), of the mounting block (11).

2. The cylindrical milling cutter for processing PCB as recited in claim 1, wherein: a plurality of spacing grooves (31) have been seted up to stopper (3) lateral wall circumference, equal threaded connection has stop screw (32) in spacing groove (31), stop screw (32) can sink into in spacing groove (31) completely, spliced pole (2) lateral wall has a plurality of waist type grooves (24) along its axial through, stop screw (32) are kept away from the one end of stopper (3) axis and are inserted and arrange in waist type groove (24).

3. The cylindrical milling cutter for processing PCB as recited in claim 1, wherein: the terminal surface coaxial coupling that spliced pole (2) are close to the tool bit of blade (1) has installation cover (4), installation cover (4) inner wall fixedly connected with butt piece (41), blade (1) passes in from installation cover (4), butt piece (41) are close to the chip groove bottom surface butt of the one end of installation cover (4) axis and blade (1).

4. The cylindrical milling cutter for processing PCB as recited in claim 3, wherein: the butt joint block (41) is spirally arranged, the spiral line of the first thread groove (22) coincides with the spiral line of the butt joint block (41), and the spiral line of a chip groove of the knife body (1) coincides with the spiral line of the first thread groove (22).

5. The cylindrical milling cutter for processing PCB as recited in claim 1, wherein: the axial length of the connecting column (2) is greater than that of the knife body (1).

6. The cylindrical milling cutter for processing PCB as recited in claim 2, wherein: the end face, far away from the mounting block (11), of the limiting block (3) is provided with a rotating groove (33).

7. The cylindrical milling cutter for processing PCB as recited in claim 1, wherein: wedge face (25) have been seted up to the position that mounting hole (21) inner wall kept away from installation cover (4), wedge face (25) are close to the one end of spliced pole (2) axis and incline towards blade (1) direction.

8. The cylindrical milling cutter for processing PCB as recited in claim 1, wherein: a plurality of locating holes (111) are circumferentially formed in the side wall of the mounting block (11), locating screws (12) are connected into the locating holes (111) in a threaded mode, and one ends, far away from the axis of the connecting columns (2), of the locating screws (12) are inserted into the waist-shaped grooves (24).