CN112318596B

CN112318596B - A pressure foot for a drilling machine

Info

Publication number: CN112318596B
Application number: CN202011100295.1A
Authority: CN
Inventors: 吴正中; 袁金兴; 温想华; 谢棚臣; 黄勇文
Original assignee: Dongguan Langming Precision Machinery Technology Co ltd
Current assignee: Dongguan Langming Precision Machinery Technology Co ltd
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2021-07-23
Anticipated expiration: 2040-10-15
Also published as: CN112318596A

Abstract

The application relates to a pressure foot for a drilling machine, and relates to the technical field of drilling machines. The pressure foot includes a base, a sliding seat is installed on the base, and a sliding block and a driving member for driving the sliding block to slide are arranged on the sliding seat. The sliding block is slidably connected with the sliding seat, the sliding block is provided with at least two pressure rings along its sliding direction, the sliding seat is provided with a working through cavity for communicating with the pressure ring, and the outer wall of the sliding seat is provided with a working through cavity for communicating with the working through cavities. Air blow structure. The driving part drives the slider to slide to align one of the pressure rings with the working through-hole, and then the drill bit of the drilling machine passes through the working through-hole and the corresponding pressure ring to drill the substrate of the printed circuit board. The blowing structure blows air into the working through cavity to blow out the debris and dust in the working through-cavity, thereby reducing the accumulation of debris and dust in the working through-cavity, thereby enabling the present application to reduce the amount of debris and dust caused by the printed circuit board substrate. resulting in drilling errors.

Description

Pressure foot for drilling machine

Technical Field

The application relates to the technical field of drilling machines, in particular to a pressure foot for a drilling machine.

Background

A printed circuit board is a carrier that supports and electrically connects electronic components, and is mainly manufactured by electronic printing. During production, the printed circuit board is required to cover the surface of the base material with copper foil, then a circuit is formed through etching treatment, and then small holes are drilled at corresponding positions on the base material for pins of electronic components to be inserted, so that circuit conduction between the electronic components is realized. When a drill bit of a drilling machine in the related art is used for drilling, a pressure foot is often used for pressing a substrate, and a working through cavity is arranged on the pressure foot and is used for the drill bit to pass through.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: while prior art drills often drill multiple stacked substrates simultaneously, drilling multiple substrates simultaneously results in a significant amount of debris dust, and the presence of debris dust can also result in errors in the location and size of the substrate holes drilled.

Disclosure of Invention

In order to reduce the error when the base material of printed circuit board drills, the purpose of this application is to provide a pressure foot for drilling machine.

The application provides a pressure foot for drilling machine adopts following technical scheme:

the utility model provides a pressure foot for drilling machine, includes the base, installs the slide on the base, is provided with the slider on the slide and orders about the gliding driving piece of slider, slider and slide sliding connection, and the slider is provided with two at least pressure rings along its slip direction, offers on the slide to be used for the work that communicates with the pressure ring to lead to the chamber, is provided with the structure of blowing that is used for leading to the chamber to blow to the work on the outer wall of slide.

Through adopting above-mentioned technical scheme, the driving piece orders about the slider and slides so that one of them pressure ring and the work lead to the chamber and aim at, and then the drill bit of drilling machine passes the work and leads to the chamber and correspond the pressure ring in order to drill to printed circuit board's substrate, and the structure of blowing simultaneously of drilling blows to the work and leads to the piece dust that the chamber was led to in order to blow out the work to reduce the work and lead to the accumulation of piece dust in the chamber, from this, make this pressure foot can reduce the drilling error that printed circuit board substrate leads to because of the piece dust.

Optionally, the pressure foot is further provided with an air floating structure, the air floating structure comprises a block air hole formed in the sliding block and an annular air hole formed in the pressure ring, the block air hole is communicated with the annular air hole, and an air floating opening is formed in one surface, far away from the working through cavity, of the pressure ring.

Through adopting above-mentioned technical scheme, to the interior back gas of ventilating of block gas pocket via ring gas pocket discharge, form the air supporting layer between the base material that air supporting opening exhaust gas made on the pressure ring air supporting opening place face and waited to process to make between base material and the pressure ring direct contact when drilling, from this, make this pressure foot can reduce the indentation on the printed circuit board, from reducing the printed circuit board because of the broken needle subaperture scheduling problem that the indentation leads to. It is worth mentioning that the existence of the air flotation layer enables the whole laminated printed circuit board not to warp when the pressure foot leaves the base material, thereby reducing the distance required by the horizontal position calibration after the return stroke of the drill bit and reducing the working stroke so as to effectively improve the drilling efficiency.

Optionally, at least one tool changing hole used for being communicated with the working through cavity is formed in the sliding block in a penetrating mode, and one tool changing hole is formed between every two adjacent pressure rings.

Through adopting above-mentioned technical scheme, the great pressure ring in aperture often is used for boring simultaneously and punches and the tool changing on traditional pressure foot, nevertheless in the in-service use process, the macropore pressure ring that will satisfy the tool changing is because the aperture is too big, leads to the face of the regional substrate of drilling to level and smooth closely knit inadequately, the easy drill way of substrate drapes over one's shoulders the cutting edge of a knife and explodes the hole scheduling problem, the setting up of trading the cutting hole makes the intra-annular hole of pressure only be used for drilling, from this for this pressure foot can further improve drilling quality.

Optionally, the sliding seat includes a connecting portion and a guiding portion, the connecting portion is fixedly connected with the base, the guiding portion is fixedly arranged on a surface of the connecting portion away from the base, a guiding sliding cavity is formed between the connecting portion and the guiding sliding portion, the sliding block is located in the guiding sliding cavity, the working through cavity is located on the connecting portion, and the air blowing structure is located on the guiding sliding portion.

Through adopting above-mentioned technical scheme, the structure of blowing blows to leading the smooth intracavity via leading smooth portion, and then gaseous leads the chamber to blow off from work, and the piece dust that leads smooth chamber and work logical intracavity is taken away in the gas flow process to further reduce the dust on slide and the slider and pile up.

Optionally, the sliding seat is provided with a positioning structure for abutting against the sliding block, the positioning structure is located at one end of the extending direction of the sliding guide cavity, and the sliding block is in surface contact with the positioning structure.

Through adopting above-mentioned technical scheme, the slider on the pressure foot is spacing often adopts the screw to carry out a point location among the correlation technique, consequently, area of contact between slider and the screw is little, the slider constantly reciprocating sliding's in-process screw influences the degree of accuracy of slider position because of collision wearing and tearing easily, and the face contact can effectively reduce slider and location structure's wearing and tearing between slider and the location structure, thereby improve the accuracy of pressure ring position when the slider slides and conflicts, therefore, make this pressure foot can further reduce the error when printed circuit board base material drills.

Optionally, the slider is laminated with connecting portion, is provided with the chip removal structure in the slider is close to the one side of connecting portion, and the chip removal structure intercommunication structure of blowing leads to the chamber with work, and the chip removal structure has scrapes the bits limit, scrape the bits limit for the chip removal structure inner wall with the slider is close to junction between the connecting portion one side.

Through adopting above-mentioned technical scheme, the slider is with the regional area that probably piles up the piece dust on the reduction slider with the laminating of connecting portion, the chip removal structure intercommunication structure of blowing and the work lead to the chamber in order to guarantee gaseous mobile chip removal, the slider is scraped the piece limit when leading the slip intracavity and is contradicted the connecting portion in order to strike off the piece dust on the slider to improve the chip removal ability of this pressure foot in order to reduce the piling up of piece dust on the pressure foot, therefore, make this pressure foot can further reduce the drilling error that printed circuit board base material leads to because of the piece dust.

Optionally, a plurality of mounting holes for mounting the pressure ring are formed in the sliding block, the chip removal structure comprises at least one vent groove and at least one connecting groove, the connecting groove is communicated with two adjacent mounting holes, and the vent groove is communicated with the blowing structure and the connecting groove.

Through adopting above-mentioned technical scheme, the slip direction distribution of pressure ring edge slider is so that the mounting hole distributes along the slip direction of slider, the slider is at the slip in-process, scrape the bits limit and scrape into the air channel with piece dust and link the hole groove, the structure of blowing simultaneously blows to the air channel and link the hole inslot so that when the chamber intercommunication is led to with work to the chip removal structure, piece dust can discharge smoothly, thereby reduce the piling up of piece dust on the pressure foot, therefore, make this pressure foot can further reduce the drilling error that printed circuit board base material leads to because of piece dust.

Optionally, an angle adjusting ring groove is circumferentially arranged on the inner wall of the mounting hole along the circumferential direction of the mounting hole, a variable angle adjusting piece is sleeved on the outer wall of the pressure ring, the variable angle adjusting piece is partially embedded into the angle adjusting ring groove, and the variable angle adjusting piece and the angle adjusting ring groove are fastened.

Through adopting above-mentioned technical scheme, there is the unevenness in the base material surface of printed circuit board actually probably because of production error, when the pressure ring supported the pressure in the base material, the base material surface exerted reverse action and is encircled in the pressure, and deformation angle modulation spare pressurized this moment takes place to deform so that produce certain angle of inclination between pressure ring and the mounting hole to make and keep laminating between pressure ring and the base material surface.

Optionally, the slide is the arc setting, and the slide is protruding towards the direction of keeping away from the base, and the slider is and slide complex arc setting, and the slider slides along the arc direction of slide.

Through adopting above-mentioned technical scheme, the slip direction of pressure ring edge slider distributes to when making one of them pressure ring contradict with the substrate, all the other pressure rings do not contradict with the substrate, from this, make the position that needs processing the hole site on the needs substrate with correspond pressure ring stable contact and be difficult for taking place inclined to one side hole, thereby make this pressure foot can further reduce the drilling error that printed circuit board leads to because of pressure ring location is stable.

Optionally, the arc diameter phi of the sliding seat is 100mm-400 mm.

By adopting the technical scheme, the sliding seat with the arc diameter of 100mm-400mm is matched with the outer diameter of 150mm-350mm, and the sliding block and the sliding seat can be switched stably at the moment, so that the pressure foot can work stably and does not deviate from a hole.

Optionally, the driving part comprises a cylinder body and a piston rod arranged on the cylinder body in a sliding manner, a limiting table is arranged on the cylinder body and surrounds the piston rod, a mounting seat is detachably arranged on the base and is located at one end of the sliding direction of the sliding block, and a limiting hole matched with the limiting table is formed in the mounting seat.

Through adopting above-mentioned technical scheme, spacing platform and spacing hole cooperation are in order to inject the position of piston rod to the installation of driving piece is convenient for.

Optionally, a main shaft hole is formed in one surface, away from the sliding block, of the base, and a chip pumping pipe communicated with the main shaft hole is arranged on the base.

Through adopting above-mentioned technical scheme, the piece dust that produces when the drilling machine drills enters into the main shaft hole via the work logical chamber, takes out the bits pipe this moment and can produce the negative pressure piece intercommunication of negative pressure to make and take out the piece dust that the bits pipe can extract the main shaft downthehole, thereby reduce the piling up of piece dust on the pressure foot, from this, make this pressure foot can further reduce the drilling error that printed circuit board base material leads to because of the piece dust.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the driving piece drives the sliding block to slide so that one of the pressure rings is aligned with the working through cavity, then a drill bit of the drilling machine penetrates through the working through cavity and the corresponding pressure ring to drill a base material of the printed circuit board, and the air blowing structure blows air into the working through cavity to blow out the chip dust of the working through cavity during drilling, so that accumulation of the chip dust in the working through cavity is reduced, and therefore the pressure pin can reduce drilling errors caused by the chip dust of the base material of the printed circuit board;

2. in the related art, the position of the sliding block on the pressure foot is limited by a screw, so that the contact area between the sliding block and the screw is small, the accuracy of the position of the sliding block is easily influenced by collision and abrasion of the screw in the process that the sliding block continuously slides in a reciprocating manner, and the sliding block and the positioning structure are in surface contact with each other

3. The abrasion between the sliding block and the positioning structure can be effectively reduced, so that the accuracy of the position of the pressure ring when the sliding block slides and conflicts is improved, and therefore, the pressure pin can reduce the error of the printed circuit board substrate during drilling;

4. the sliding block is attached to the connecting part so as to reduce the area of a region where the chip dust is likely to be accumulated on the sliding block, the chip removal structure is communicated with the air blowing structure and the working through cavity so as to ensure the flowing chip removal of air, and when the sliding block slides in the guide sliding cavity, the chip removing edge is abutted against the sliding block so as to scrape the chip dust on the sliding block, so that the chip removal capacity of the pressure pin is improved so as to reduce the accumulation of the chip dust on the pressure pin, and therefore, the pressure pin can reduce the drilling error of a base material of a printed circuit board caused by the chip dust;

5. the surface of the base material of the printed circuit board may be uneven due to production errors, when the pressure ring is pressed against the base material, the surface of the base material exerts reverse action on the pressure ring, and the deformation angle adjusting piece is pressed to deform so as to generate a certain inclination angle between the pressure ring and the mounting hole, so that the pressure ring is attached to the surface of the base material.

Drawings

FIG. 1 is a schematic overall structure diagram of a first embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of a first embodiment of the present application;

FIG. 3 is a schematic front view of the first embodiment of the present application;

FIG. 4 is a partially enlarged schematic view of portion A of FIG. 2;

FIG. 5 is a schematic diagram of an exploded structure among the slider, the slider and the pressure ring according to an embodiment of the present application;

FIG. 6 is a schematic overall structure diagram of a second embodiment of the present application;

FIG. 7 is a schematic partial cross-sectional view of a slider and a slider according to a second embodiment of the present application;

fig. 8 is a partially enlarged structural view of a portion B in fig. 7.

In the figure, 1, a base; 11. a spindle hole; 12. a chip pumping pipe; 2. a slide base; 21. a connecting portion; 22. a slide guide part; 23. a slide guide cavity; 24. a blowing structure; 25. a working through cavity; 26. a positioning structure; 261. avoiding the notch; 3. a slider; 31. mounting holes; 311. an angle adjusting ring groove; 32. a chip removal structure; 321. a vent channel; 322. a hole connecting groove; 323. scraping scraps; 4. a pressure ring; 41. a deformation trim; 5. a drive member; 51. a cylinder body; 52. a piston rod; 53. a limiting table; 6. a mounting seat; 61. a limiting hole; 7. an air floating structure; 71. a block air hole; 711. air floatation opening; 72. an annular air hole; 8. and (6) changing a cutter hole.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

The embodiment of the application discloses pressure foot for drilling machine.

The first embodiment is as follows:

referring to fig. 1 and 2, a pressure foot for a drilling machine includes a base 1, the base 1 is disposed in a cylindrical shape to form a spindle hole 11 inside the base 1, and one end of the spindle hole 11 is open and the other end is closed. The base 1 is provided with a chip extraction pipe 12 communicated with the spindle hole 11, and the chip extraction pipe 12 is communicated with a negative pressure piece capable of generating negative air pressure. The slide base 2 is mounted on the end face of the closed end of the spindle hole 11. The sliding base 2 comprises a connecting portion 21 and two sliding guide portions 22, the connecting portion 21 is fixedly connected with the closed end of the base 1, and the sliding guide portions 22 are fixedly arranged on one surface, far away from the base 1, of the connecting portion 21. The slide carriage 2 is arranged like an "Jiong" so that a slide guiding cavity 23 is formed between the connecting portion 21 and the two slide guiding portions 22. The slide guiding cavity 23 is internally provided with a slide block 3 in a sliding way, and the base 1 is correspondingly provided with a driving piece 5 for driving the slide block 3 to slide.

Referring to fig. 3, in the first embodiment, the sliding seat 2 is disposed in an arc shape, the sliding seat 2 protrudes toward a direction away from the base 1, the sliding block 3 is disposed in an arc shape matched with the sliding seat 2, and a sliding direction of the sliding block 3 is the same as an arc direction of the sliding seat 2. The arc-shaped outer diameter phi of the guide sliding part 22 on the sliding seat 2 is 100mm-400 mm. The sliding seat 2 and the sliding block 3 are both formed by finish machining after metal heat treatment, so that the sliding seat 2 and the sliding block 3 have the advantages of high temperature resistance, high hardness and high precision, and the stability and the precision of the sliding seat 2 and the sliding block 3 in the long-term use process are ensured.

Referring to fig. 2, a working through cavity 25 is formed in the connecting portion 21 of the sliding base 2 in a penetrating manner, the working through cavity 25 is arranged in a hole shape, and the working through cavity 25 is communicated with the spindle hole 11. At least two mounting holes 31 for communicating with the working through cavity 25 are formed in the sliding block 3 in a penetrating mode. The mounting holes 31 are provided at intervals in the sliding direction of the slider 3. Each mounting hole 31 is detachably provided with a pressure ring 4, and the pressure ring 4 is in clearance fit with the corresponding mounting hole 31. In the first embodiment, the number of the mounting holes 31 is two, and the number of the pressure rings 4 is two and is arranged in one-to-one correspondence with the mounting holes 31.

It is worth mentioning that the outer wall of the pressure ring 4 is provided with an embedded groove along the circumferential direction, the pressure ring 4 is sleeved with a deformation angle adjusting piece 41, and the deformation angle adjusting piece 41 is partially positioned in the embedded groove. The deformation angle adjusting piece 41 is annularly arranged and made of elastic rubber. Correspondingly, the inner wall of the mounting hole 31 is provided with an angle adjusting ring groove 311 along the circumferential direction thereof, and the angle adjusting ring groove 311 is a triangular groove, a trapezoidal groove or an arc groove with a central angle smaller than 90 degrees, so that the angle adjusting ring groove 311 has a first inclined inner wall and a second inclined inner wall along the axial direction of the mounting hole 31.

Referring to fig. 2 and 4, the first inclined inner wall and the second inclined inner wall form an included angle α, which is 50 ° to 130 °. The deformation angle adjusting piece 41 is partially embedded in the angle adjusting ring groove 311, so that the angle adjusting piece 41 is fastened with the angle adjusting ring groove 311.

When the pressure ring 4 is pressed against the substrate, the surface of the substrate exerts reverse action on the pressure ring 4, and at this time, the deformation angle adjusting piece 41 is pressed to deform so as to generate a certain inclination angle between the pressure ring 4 and the mounting hole 31, so that the pressure ring 4 is kept attached to the surface of the substrate.

Referring to fig. 5, an air blowing structure 24 for blowing air into the working through cavity 25 is provided on the outer wall surface of the slide 2, and the air flow delivered by the air blowing structure 24 can blow out the chip dust in the working through cavity 25. Specifically, the air blowing structure 24 is at least one air inlet hole penetrating the slide guide 22, and the air inlet hole is used for connecting with an air supply member such as an air pump. An air inlet pipe can be arranged in the air inlet hole so as to facilitate the connection of the air supply piece. The air inlet hole is communicated with the sliding guide cavity 23 and can blow air to the working through cavity 25 through the sliding guide cavity 23.

Referring to fig. 2 and 5, the slider 3 is fitted to the connecting portion 21 to reduce the area of the slider 3 where debris dust may accumulate. In order to ensure the flow of the gas, a chip removal structure 32 is arranged on one surface of the sliding block 3 close to the connecting part 21, and the chip removal structure 32 is communicated with the air blowing structure 24 and the working through cavity 25. Specifically, the chip removal structure 32 includes at least one vent groove 321 and at least one connecting hole groove 322, the connecting hole groove 322 communicates with two adjacent mounting holes 31, and the vent groove 321 communicates with the air blowing structure 24 and the connecting hole groove 322. The gas supplied from the gas blowing structure 24 enters the communicating hole groove 322 through the vent groove 321, then enters the working through cavity 25 from the communicating hole groove 322, and finally is discharged through the working through cavity 25 and the spindle hole 11.

At this time, a scraping edge 323 is formed at a connection portion between the inner wall of the vent groove 321, the inner wall of the connecting groove 322, and the surface of the slider 3 adjacent to the connecting portion 21. When the slider 3 slides in the slide guide chamber 23, the scraping edge 323 abuts against the connecting portion 21 to scrape off the slider 3 and the connecting portion 21 of the dust.

Referring to fig. 2, in the first embodiment, the driving member 5 is an air cylinder, and the driving member 5 is located at one end of the sliding block 3 in the sliding direction. The driving member 5 comprises a cylinder 51 and a piston rod 52 slidably disposed in the cylinder 51, and an end of the piston rod 52 is hinged to the slider 3. A limit table 53 is provided on a surface of the cylinder body 51 adjacent to the slider 3, and the limit table 53 is annularly provided to surround the piston rod 52. Correspondingly, the base 1 is detachably provided with a mounting seat 6 for mounting the driving piece 5. The mounting seat 6 is provided with a limiting hole 61, and the piston rod 52 penetrates through the limiting hole 61 and the limiting platform 53 to be connected with the limiting platform 53 in a clamping manner.

In order to limit the sliding block 3 from sliding off the sliding guide cavity 23, the sliding base 2 is provided with two positioning structures 26 for abutting against the sliding block 3, wherein one positioning structure 26 is located at one end of the sliding guide cavity 23 in the extending direction, and the other positioning structure 26 is located at the other end of the sliding guide cavity 23 in the extending direction. The positioning structure 26 is arranged in a rectangular plate shape or a plate shape similar to the shape of Contraband, so that the positioning structure 26 is in surface contact with the sliding block 3. Wherein, the positioning structure 26 near the mounting seat 6 is provided with an abdicating notch 261 for the piston rod 52 to pass through.

The implementation principle of the first embodiment of the application is as follows: the driving member 5 drives the sliding block 3 to slide so as to align one of the pressure rings 4 with the working through cavity 25, the base 1 is moved so as to press the pressure ring 4 against the substrate, the surface of the substrate is applied with a reverse action on the pressure ring 4, at this time, the deformation angle adjusting member 41 is pressed and deformed so as to generate a certain inclination angle between the pressure ring 4 and the mounting hole 31, so that the pressure ring 4 and the surface of the substrate are kept attached, then, a drill bit of the drilling machine penetrates through the working through cavity 25 and the corresponding pressure ring 4 to drill the substrate of the printed circuit board, the air blowing structure 24 blows air into the working through cavity 25 through the chip removal structure 32 to blow out the chips and dust in the working through cavity 25 while drilling, and the blown chips and dust enters the spindle hole 11 and then is discharged from the chip extraction pipe 12.

Example two:

the difference between the second embodiment and the first embodiment is:

referring to fig. 6 and 7, at least one cutter changing hole 8 is formed in the sliding block 3 in a penetrating mode, the cutter changing hole 8 is used for being communicated with the working through cavity 25, and the aperture of the cutter changing hole 8 is slightly larger than the diameter of the drill bit. And the cutter changing hole 8 is arranged between two adjacent pressure rings 4. In the second embodiment, the number of the tool changing holes 8 is one, and the two installation holes 31 for installing the pressure ring 4 and the one tool changing hole 8 are arranged to enable the pressure foot to have three hole positions, so that the slider 3 can have three states communicated with the working through cavity 25 when sliding, and therefore the pressure foot can be switched between three positions.

In order to reduce the direct contact between the pressure ring 4 and the printed circuit board during operation, an air floating structure 7 is also arranged on the pressure foot. Specifically, the air floating structure 7 includes a block air hole 71 opened in the slider 3 and an annular air hole 72 opened in the pressure ring 4. The block air hole 71 is used for connection with an air supply member such as an air pump. The number of the ring air holes 72 on each pressure ring 4 is at least three, and all the ring air holes 72 communicate with the block air holes 71. Each ring air hole 72 is provided with air floatation openings 711 on one surface of the pressure ring 4 far away from the working through cavity 25, and all the air floatation openings 711 are distributed on the corresponding pressure ring 4 at equal intervals by taking the axis of the pressure ring 4 as the center, so that the air floatation pressure between the pressure ring 4 and the printed circuit board is kept balanced.

The second implementation principle of the embodiment of the application is as follows: the driving member 5 drives the sliding block 3 to slide to align one of the pressure rings 4 with the working through cavity 25, the base 1 is moved to make the pressure ring 4 approach the substrate, the block air hole 71 is ventilated to supply air to the ring through hole, the air is discharged from the air floating opening 711 to form an air floating layer between the printed circuit board and the pressure ring 4, then the drill bit of the drilling machine passes through the working through cavity 25 and the corresponding pressure ring 4 to drill the substrate of the printed circuit board, the air blowing structure 24 blows air into the working through cavity 25 through the chip removing structure 32 to blow out the chip dust of the working through cavity 25, and the blown chip dust enters the spindle hole 11 and then is discharged from the chip suction pipe 12.

The embodiments of the present invention are preferred embodiments of the present application, and the protection scope of the present application is not limited thereby, wherein like parts are denoted by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component. Therefore, the method comprises the following steps: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A pressure foot for a drilling machine, comprising a base (1), characterized in that a sliding seat (2) is installed on the base (1), and a sliding block is provided on the sliding seat (2) (3) and a driving member (5) for driving the sliding block (3) to slide, the sliding block (3) is slidably connected with the sliding seat (2), and the sliding block (3) is arranged along its sliding direction There are at least two pressure rings (4), the sliding seat (2) is provided with a working through cavity (25) for communicating with the pressure ring (4), and the outer wall surface of the sliding seat (2) is provided with There is an air blowing structure (24) for blowing air to the working through-cavity (25);

In order to reduce the direct contact between the pressure ring (4) and the printed circuit board during operation, an air-floating structure (7) is also provided on the pressure foot, and the air-floating structure (7) includes a structure arranged on the sliding block. The block air hole (71) of (3) and the ring air hole (72) opened in the pressure ring (4), the block air hole (71) is used to communicate with the ring air hole (72), and the ring air hole ( 72) There are air flotation openings (711) on the side of the pressure ring (4) away from the working through cavity (25); all the air flotation openings (711) are on the corresponding pressure ring (4) with the number The axis of the pressure ring (4) is distributed at equal intervals in the center, so as to ensure that the air flotation pressure between the pressure ring (4) and the printed circuit board is kept in balance;

The sliding seat (2) includes a connecting part (21) and a guide sliding part (22), the connecting part (21) is fixedly connected with the base (1), and the guide sliding part (22) is fixedly arranged on the base (1). A surface of the connecting portion (21) away from the base (1), a guide sliding cavity (23) is formed between the connecting portion (21) and the guide sliding portion (22), and the sliding block ( 3) is located in the guide sliding cavity (23), the working through cavity (25) is located on the connecting part (21), and the blowing structure (24) is located on the sliding guide part (22);

The sliding block (3) is fitted with the connecting portion (21), a chip removal structure (32) is provided on the side of the sliding block (3) close to the connecting portion (21), and the chip removal structure (32) Connecting the blowing structure (24) and the working through cavity (25), the chip removal structure (32) has a scraping edge (323), and the scraping edge (323) serves as a chip removal structure (32) The connection between the inner wall and the side of the slider (3) close to the connecting portion (21), when the slider (3) slides in the sliding guide cavity (23), the The scraping edge (323) abuts against the connecting portion (21) to scrape off the debris and dust on the slider (3) and the connecting portion (21);

The slider (3) is provided with a plurality of mounting holes (31) for mounting the pressure ring (4), and the chip removal structure (32) includes at least one ventilation groove (321) and at least one connecting hole groove (322), the connecting hole groove (322) communicates with two adjacent mounting holes (31), and the ventilation groove (321) communicates with the blowing structure (24) and the connecting hole groove (322);

The inner wall of the mounting hole (31) is provided with an angle adjustment ring groove (311) along its circumferential direction, and the outer wall of the pressure ring (4) is sleeved with a deformation angle adjustment piece (41), and the deformation angle adjustment piece ( 41) Partially embedded in the angle adjustment ring groove (311), the deformation angle adjustment piece (41) and the angle adjustment ring groove (311) are tightly fastened, and the deformation angle adjustment piece (41) is pressed Deformation occurs to generate an inclination angle between the pressure ring (4) and the mounting hole (31);

A main shaft hole (11) is opened on the side of the base (1) away from the slider (3), and a chip extraction pipe (11) communicated with the main shaft hole (11) is provided on the base (1). 12);

When the pressure foot works, the driving member (5) drives the sliding block (3) to slide so that one of the pressure rings (4) is aligned with the working through-cavity (25), and moves the base (1). ) so that the pressure ring (4) is pressed against the base material, and the surface of the base material exerts a reverse action on the pressure ring (4), at this time, the deformation angle adjusting member (41) is pressed and deformed to make the pressure A certain inclination angle is generated between the ring (4) and the mounting hole (31), so that the pressure ring (4) and the surface of the substrate are kept in contact, and then the drill bit of the drilling machine passes through the work The through cavity (25) and the corresponding pressure ring (4) are used to drill the base material of the printed circuit board, and the air blowing structure (24) is connected to the working channel through the chip removal structure (32) at the same time of drilling. Air is blown in the cavity (25) to blow out the debris and dust in the working through-cavity (25), and the blown debris and dust enter the main shaft hole (11) and are discharged from the debris extraction pipe (12).

2 . The pressure foot for a drilling machine according to claim 1 , wherein at least one tool change hole ( 8), there is a tool change hole (8) between two adjacent pressure rings (4).

3 . The pressure foot for a drilling machine according to claim 1 , wherein the sliding seat ( 2 ) is provided with a positioning structure ( 26 ) for colliding with the sliding block ( 3 ), and the positioning structure (26) is located at one end of the guide sliding cavity (23) in the extending direction, and the sliding block (3) and the positioning structure (26) are in surface contact.

4 . The pressure foot for a drilling machine according to claim 1 , wherein the sliding seat ( 2 ) is arranged in an arc shape, and the sliding seat ( 2 ) faces a direction away from the base ( 1 ). 5 . The sliding block (3) is arranged in an arc shape matched with the sliding seat (2), and the sliding block (3) slides along the arc-shaped direction of the sliding seat (2).

5 . The pressure foot for a drilling machine according to claim 4 , wherein the arc diameter φ of the sliding seat ( 2 ) is 100mm-400mm. 6 .

6 . The pressure foot for a drilling machine according to claim 1 , wherein the driving member ( 5 ) comprises a cylinder body ( 51 ) and a piston rod ( 52 ) slidably arranged on the cylinder body ( 51 ). 7 . , a limiting platform (53) is arranged on the cylinder body (51), the limiting platform (53) is arranged around the piston rod (52), and a mounting seat (53) is detachably provided on the base (1). 6), the mounting seat (6) is located at one end of the sliding block (3) in the sliding direction, and the mounting seat (6) is provided with a limiting hole (61) that cooperates with the limiting platform (53). ).