PCB milling device and method of use

Abstract

The application discloses a PCB milling device and a use method, relates to the technical field of PCB processing, and solves the problem that a large amount of heat is generated due to the friction and extrusion of a cutter of a PCB milling machine, the copper foil or elements on the PCB are possibly ablated when the temperature of the cutter of the milling machine is too high, and the PCB is damaged by heat, and the device comprises a fixed plate fixedly installed on a control mechanism of the milling machine, a top plate and a bottom plate fixedly installed on a side of the fixed plate away from the control mechanism, and a plurality of connecting columns fixedly installed between the top plate and the bottom plate and equidistantly distributed. The milling mechanism is used for processing the PCB, and the number of the milling mechanisms is two groups; the driving motor in the driving mechanism can drive the two milling mechanisms to rotate left and right, the two milling mechanisms are alternately used to process the PCB, the cutter is alternately cooled, and the cutter is effectively prevented from being overheated to damage the PCB.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of PCB processing, in particular to a PCB milling device and a use method thereof. BACKGROUND

[0002] PCB milling refers to a process of cutting a pattern required by a customer according to an engineering formula of engineering design by a milling cutter, and the process is an important procedure in PCB manufacturing. In the process of processing a PCB by a milling machine, a positioning mechanism is used to position the PCB in order to ensure the processing precision of the milling.

[0003] In the process of the milling of the PCB in the prior art, the cutter of the PCB milling machine generates a large amount of heat due to friction and extrusion. When the cutter processes the PCB for a period of time, the cutter of the milling machine has a phenomenon of excessively high temperature. At this time, the high temperature causes the material of the cutter to change chemically when the cutter continues to process the PCB, which aggravates the wear of the cutter, thereby causing the cutting of the PCB to be inaccurate, affecting the dimensional accuracy of the PCB, and if the temperature of the cutter is excessively high, the direct contact of the cutter with the PCB or the accumulation of heat caused indirectly can damage the PCB, which can ablate the copper foil or elements on the PCB, and cause thermal damage to the PCB. SUMMARY

[0004] The application aims to provide a PCB milling device and a use method thereof to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme.

[0006] A PCB milling device comprises a fixed plate fixedly installed on a control mechanism of a milling machine, a top plate and a bottom plate fixedly installed on a side of the fixed plate away from the control mechanism, wherein the top plate is located on the upper side of the bottom plate, a plurality of connecting columns are fixedly installed between the top plate and the bottom plate, the connecting columns are equidistantly distributed, a milling mechanism is used to process a PCB, the number of the milling mechanisms is two, and the two milling mechanisms are installed on the outer sides of the top plate and the bottom plate; a driving mechanism is used to drive the two milling mechanisms to rotate, the driving mechanism is installed on the bottom plate; and a lifting mechanism is used to adjust the height of the milling mechanism, and the lifting mechanism is installed on the outer side of the milling mechanism.

[0007] Preferably, the driving mechanism comprises a driving motor fixedly installed at the center of the upper end of the bottom plate, the lower end of the driving shaft of the driving motor is fixedly connected with a disc, the outer side of the disc is fixedly installed with two symmetrically distributed connecting seats, the concentric angle between the two connecting seats is 90°, and the gong plate mechanism comprises a driving seat, the outer side of the driving seat is fixedly provided with a plurality of circumferentially equidistantly distributed convex ribs, and the edges of the plurality of convex ribs are all arc processed.

[0008] Preferably, the outer side of the driving seat and the convex rib is movably sleeved with a positioning seat near the lower end of the driving seat, the connecting mode between the positioning seat and the connecting seat is fixed connection, the lower end of the driving seat is rotatably installed with a plug-in seat, the center of the lower end of the plug-in seat is embedded with a pin column, the connecting mode between the pin column and the plug-in seat is plug-in connection, the transverse section of the pin column is rectangular and is chamfered, and the lower end center of the pin column is fixedly embedded with a cutter.

[0009] Preferably, the lifting mechanism comprises a sleeving seat fixedly sleeved on the outer side of the driving seat and the convex rib, and the sleeving seat is located on the upper side of the positioning seat, a top rod is installed at the front of the sleeving seat, and the top rod is fixedly connected with the sleeving seat through a fixing seat, both ends of the top rod are movably embedded with two rolling balls, the rolling balls can reduce the moving resistance of the top rod, and the upper end of the bottom plate is fixedly installed with two symmetrically distributed arc baffle blocks one.

[0010] Preferably, the two arc baffle blocks one are close to the edges of the bottom plate, one end of each of the two arc baffle blocks one close to each other is provided with an inclined slope one, the rolling ball at the lower end of the top rod is in rolling contact with the arc baffle block one through the inclined slope one, one of the connecting columns in front is fixedly installed with an arc baffle block two close to one side of the gong plate mechanism, both ends of the arc baffle block two are provided with inclined slopes two, and the rolling ball at the upper end of the top rod is in rolling contact with the arc baffle block two through the inclined slope two, and the inclined slope two can prevent the top rod from being stuck by the arc baffle block two.

[0011] Preferably, the upper end of the sleeving seat is fixedly connected with a spring two, and the spring two is movably sleeved on the outer side of the driving seat, the spring two can drive the cutter to move downward, the upper end of the spring two is fixedly connected with a washer two, and the washer two is movably sleeved on the outer side of the driving seat, the upper end of the washer two is installed with an arc baffle strip, and the arc baffle strip is fixedly installed on the outer side of the top plate, and the connecting modes of the washer two, the top plate and the arc baffle strip are all sliding contact.

[0012] Preferably, the outer side of the pin post is internally provided with a plurality of circumferentially equidistantly distributed connecting assemblies in the socket, the connecting assembly comprises a pin rod capable of moving in the socket, the cross-sectional shape of the pin rod is circular, the pin rod is provided with a hemispherical part at one end close to the pin post, the outer side of the pin rod is fixedly sleeved with a washer I, and the outer side of the pin rod is movably sleeved with a spring I.

[0013] Preferably, the two ends of the spring I are respectively in abutment with the socket and the washer I, the outer side of the pin post is provided with a plurality of hemispherical clamping grooves equal in number to the connecting assemblies, the hemispherical part of the pin rod is movably clamped with the pin post through the hemispherical clamping grooves, and the end of the pin rod away from the pin post is movably embedded with a ball I, and the ball I can reduce the rotational resistance of the pin rod.

[0014] Preferably, the outer side of the ball I is movably in abutment with a positioning tube, the positioning tube is movably sleeved on the outer side of the socket, the connecting mode between the ball I and the positioning tube is rolling contact, the center of the positioning tube coincides with the center of the socket, the outer side of the positioning tube is fixedly provided with two symmetrically distributed bent connecting rods, and the end of the bent connecting rod away from the positioning tube is fixedly connected with the positioning seat.

[0015] A use method of a PCB milling device:

[0016] S1: processing stage, the control mechanism on the milling machine drives the fixed plate and the milling mechanism to move forward and backward, left and right, up and down, and processes the PCB;

[0017] S2: tool changing stage, when the tool processes the PCB for a period of time and the temperature rises, the driving motor drives the two milling mechanisms to rotate, the tool is replaced, and the two milling mechanisms are used alternately;

[0018] S3: rising stage, during the process of replacing the tool, the ball II at the lower end of the ejector rod on the outer side of the replaced milling mechanism moves along the slope I of the circular arc block I to the highest point of the circular arc block I, and in this process, the height of the replaced tool is raised;

[0019] S4: tool replacement stage, during the process of rising of the milling mechanism, a plurality of pin rods also rise, the ball I rises and is separated from the positioning tube, at this time, the hemispherical part of the pin rod can be separated from the hemispherical clamping groove by slightly applying force, the pin post and the socket are convenient to disassemble and assemble, and the tool can be replaced.

[0020] Compared with the prior art, the PCB milling device has the following beneficial effects:

[0021] 1、The present application is through the installation of two plate mechanism and driving mechanism, driving mechanism in driving motor can drive two plate mechanism left and right rotation, is favorable to two plate mechanism alternately to PCB board processing, so as to facilitate the tool alternately cooling, effectively avoid the tool overheating to PCB board cause damage.

[0022] 2、The present application is through the installation of lifting assembly, lifting assembly in arc block one can be driven by the top bar to rise away from the processing station of plate mechanism, make the tool away from the processing station rise a certain height, can effectively avoid the tool on the processing station when processing PCB board, the tool on the cooling station influences the movement of tool on the processing station.

[0023] 3、The present application is through the installation of connecting assembly, when the tool away from the processing station rises a certain height, multiple ball one will move up and separate from the positioning tube, at this time, the pin rod can move in the plug-in seat, at this time, only need to slightly use force to make the hemispherical part of pin rod separate from the hemispherical slot, so as to facilitate the quick replacement of damaged tool. DRAWINGS

[0024] Figure 1 It is the overall structure schematic diagram of the present application;

[0025] Figure 2 It is the overall side view of the present application;

[0026] Figure 3 It is the cross section schematic diagram of the present application;

[0027] Figure 4 It is the overall bottom side schematic diagram of the present application;

[0028] Figure 5 It is the driving mechanism and bottom plate split schematic diagram of the present application;

[0029] Figure 6 It is the plate mechanism place side cut schematic diagram of the present application;

[0030] Figure 7 It is the plate mechanism place side cut schematic diagram of the present application; Figure 6 It is the enlarged schematic diagram of A in the present application;

[0031] Figure 8 It is the tool and mounting seat split schematic diagram of the present application.

[0032] In the figure: 1, fixed plate; 2, top plate; 3, bottom plate; 4, connecting column; 5, driving motor; 6, disc; 7, connecting seat; 8, driving seat; 9, convex rib; 10, positioning seat; 11, plug-in seat; 12, pin column; 13, cutter; 14, pin rod; 15, washer I; 16, spring I; 17, half-ball clamping groove; 18, ball I; 19, positioning tube; 20, bent connecting rod; 21, sleeve seat; 22, fixed seat; 23, jacking rod; 24, ball II; 25, arc block I; 26, arc block II; 27, spring II; 28, washer II; 29, arc block. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0034] Embodiment one: please refer to Figure 1 、 Figure 6 , a PCB milling device shown in the figure, comprising a fixed plate 1 fixedly installed on the control mechanism of the milling machine, further comprising a top plate 2 and a bottom plate 3 fixedly installed on the side of the fixed plate 1 away from the control mechanism, and the top plate 2 is located on the upper side of the bottom plate 3, and a plurality of connecting columns 4 are fixedly installed between the top plate 2 and the bottom plate 3 in equidistant distribution; a milling mechanism for processing PCB, the number of milling mechanisms is two groups, and the two milling mechanisms are installed on the outer side of the top plate 2 and the bottom plate 3; a driving mechanism for driving the two milling mechanisms to rotate, the driving mechanism is installed on the bottom plate 3; a lifting mechanism for adjusting the height of the milling mechanism, the lifting mechanism is installed on the outer side of the milling mechanism.

[0035] The driving mechanism comprises a driving motor 5 fixedly installed at the center of the upper end of the bottom plate 3, the lower end of the driving shaft of the driving motor 5 is fixedly connected with a disc 6, two connecting seats 7 symmetrically distributed are fixedly installed on the outer side of the disc 6, and the concentric angle between the two connecting seats 7 is 90°, the milling mechanism comprises a driving seat 8, a plurality of convex ribs 9 are fixedly arranged on the outer side of the driving seat 8 in circumferential equidistant distribution, and the edges of the plurality of convex ribs 9 are arc processed.

[0036] The outer side of the driving seat 8 and the convex rib 9 movably sleeves the positioning seat 10 close to the lower end of the driving seat 8, and the connecting mode between the positioning seat 10 and the connecting seat 7 is fixed connection, the lower end of the driving seat 8 is rotatably installed with the plug-in seat 11, the lower end center of the plug-in seat 11 is embedded with the pin column 12, and the connecting mode between the pin column 12 and the plug-in seat 11 is plug-in connection, the transverse section of the pin column 12 is rectangular and chamfered, and the lower end center of the pin column 12 is fixedly embedded with the cutter 13.

[0037] A PCB milling device and a use method thereof

[0038] S1: processing stage, the control mechanism on the milling machine drives the fixed plate 1 and the milling mechanism to move forward and backward, left and right, up and down, and processes the PCB board;

[0039] S2: tool changing stage, when the tool 13 processes the PCB board for a period of time and the temperature rises, the driving motor 5 drives the two milling mechanisms to rotate to change the tool 13, so that the two milling mechanisms are used alternately;

[0040] S3: rising stage, during the process of changing the tool 13, the ball 24 at the lower end of the ejector rod 23 outside the changed milling mechanism moves along the slope I of the arc block I 25 to the highest point of the arc block I 25, and in this process, the height of the changed tool 13 is raised;

[0041] S4: tool changing stage, during the rising process of the milling mechanism, the plurality of pin rods 14 also rise, and the ball 18 rises to separate from the positioning pipe 19, at this time, the half-sphere part of the pin rod 14 can be separated from the half-sphere slot 17 by applying a little force, so that the pin column 12 and the plug-in seat 11 are convenient to disassemble and assemble, and the tool 13 can be changed.

[0042] Working principle: during the process of milling the PCB board, the control mechanism of the milling machine drives the fixed plate 1 and the two milling mechanisms to move forward and backward, left and right, up and down, and the driving seat 8 on the processing station drives the tool 13 to rotate to process the PCB board, and during the process of processing the PCB board, under the self-locking performance of the driving motor 5, the two milling mechanisms cannot rotate; when the tool 13 at the processing station processes the PCB board for a period of time, the driving motor 5 drives the milling mechanism at the processing station to rotate to the corresponding direction according to the position of the milling mechanism at the processing station, at this time, the milling mechanism at the cooling station is rotated to the processing station by the driving motor 5 to continue processing the PCB board, which is conducive to the alternation of the two milling mechanisms to process the PCB board, so as to facilitate the alternation of the tool 13 and effectively avoid the damage of the overheated tool 13 to the PCB board.

[0043] Embodiment two: please refer to Figures 2-5 , the embodiment further illustrates the embodiment one, the lifting mechanism includes a sleeve seat 21 which is sleeved on the outside of the driving seat 8 and the protruding rib 9, and the sleeve seat 21 is located on the upper side of the positioning seat 10, a top rod 23 is installed in front of the sleeve seat 21, and the top rod 23 is fixedly connected with the sleeve seat 21 through a fixed seat 22, the two ends of the top rod 23 are movably embedded with ball 24, the ball 24 can reduce the moving resistance of the top rod 23, and the upper end of the bottom plate 3 is fixedly installed with two symmetrically distributed arc blocks I 25.

[0044] Two circular arc blocks 25 are close to the edge of the top plate 3, and the end of the two circular arc blocks 25 close to each other is provided with a slope 1, and the ball 2 24 at the lower end of the top rod 23 is in rolling contact with the circular arc block 1 25 through the slope 1, and the connecting column 4 in the front is fixedly installed with a circular arc block 2 6 close to the side of the hammer plate mechanism, and the two ends of the circular arc block 2 6 are provided with a slope 2, and the ball 2 24 at the upper end of the top rod 23 is in rolling contact with the circular arc block 2 6 through the slope 2, and the slope 2 can prevent the top rod 23 from being stuck by the circular arc block 2 6.

[0045] The upper end of the sleeve seat 21 is fixedly connected with a spring 2 7, and the spring 2 7 is movably sleeved on the outside of the driving seat 8. The spring 2 7 can drive the cutter 13 to move downward. The upper end of the spring 2 7 is fixedly connected with a washer 2 8, and the washer 2 8 is movably sleeved on the outside of the driving seat 8. The upper end of the washer 2 8 is provided with a circular arc block 2 9, and the circular arc block 2 9 is fixedly installed on the outside of the top plate 2. The connection mode of the washer 2 8 with the top plate 2 and the circular arc block 2 9 is sliding contact.

[0046] In this embodiment: in the process of driving the hammer plate mechanism on the processing station to rotate to the cooling station, the driving seat 8 will drive the top rod 23 to rotate together through the sleeve seat 21. The top rod 23 rolls along the slope 1 of the circular arc block 1 25 to the highest point of the circular arc block 1 25 in the process of rotation. In this process, the cutter 13 in the hammer plate mechanism will also rise to a certain height, which can effectively avoid the influence of the cutter 13 in the cooling station on the movement of the cutter 13 in the processing station when the cutter 13 in the processing station is processing the PCB board.

[0047] When the hammer plate mechanism on the processing station rotates to the cooling station, the hammer plate mechanism on the cooling station will also rotate to the processing station. In the process of rotating the hammer plate mechanism on the cooling station to the processing station, under the driving of the compressed spring force of the spring 2 7, the top rod 23 and the cutter 13 will move downward through the slope 1 of the circular arc block 1 25. In the process of rotating the top rod 23, the ball 2 24 at the upper end of the top rod 23 will be in rolling contact with the slope 2 of the circular arc block 2 6, so that the hammer plate mechanism is completely moved downward and reset. In the process of processing the PCB board by the hammer plate mechanism, the circular arc block 2 6 blocks the top rod 23 to prevent the hammer plate mechanism from moving upward.

[0048] Example three: please refer to Figures 6-8 , the embodiment further illustrates the embodiment one, a plurality of connection assemblies are installed on the outside of the pin column 12 in the inside of the plug-in seat 11, the connection assemblies include a pin rod 14 which can move in the plug-in seat 11, the cross-sectional shape of the pin rod 14 is circular, the end of the pin rod 14 close to the pin column 12 is provided with a hemispherical part, the outside of the pin rod 14 is fixedly sleeved with a washer 1 5, and the outside of the pin rod 14 is movably sleeved with a spring 1 6.

[0049] Two ends of the spring 16 are respectively in abutment with the plug-in seat 11 and the washer 15, and the outer side of the pin column 12 is provided with a plurality of hemispherical clamping grooves 17 equal in number to the connecting assemblies, and the hemispherical part of the pin rod 14 is movably clamped with the pin column 12 through the hemispherical clamping grooves 17, and the end of the pin rod 14 away from the pin column 12 movably embeds a ball 18, and the ball 18 can reduce the rotational resistance of the pin rod 14.

[0050] The outer side of the ball 18 movably abuts against a positioning tube 19, and the positioning tube 19 movably sleeves the outer side of the plug-in seat 11, and the connection between the ball 18 and the positioning tube 19 is rolling contact, and the center of the positioning tube 19 coincides with the center of the plug-in seat 11, and the outer side of the positioning tube 19 fixedly installs two symmetrically distributed bent connecting rods 20, and the end of the bent connecting rod 20 away from the positioning tube 19 is fixedly connected with the positioning seat 10.

[0051] In the embodiment, during the moving of the gong plate mechanism, a plurality of positioning assemblies move upward, after the ball 18 in the positioning assembly moves upward and is separated from the positioning tube 19, the pin rod 14 can move in the interior of the plug-in seat 11, at this time, slight force can make the hemispherical part of the pin rod 14 separate from the hemispherical clamping groove 17, so that the pin column 12 and the plug-in seat 11 are convenient to disassemble and assemble;

[0052] When the gong plate mechanism moves downward and resets, during the rotating of the cutter 13 to process the PCB, a plurality of balls 18 abut against the inner wall of the positioning tube 19 and roll, and the positioning tube 19 can block the pin rod 14 from moving in the interior of the plug-in seat 11 through the ball 18, so that the pin column 12 and the plug-in seat 11 are firmly connected during the processing of the cutter 13 to the PCB, and the cutter 13 will not fall off.

[0053] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0054] Although embodiments of the present application have been shown and described, it would be appreciated by those skilled in the art that changes can be made in these embodiments without departing from the principles and spirit of the application, the scope of which is defined in the claims and their equivalents.

Claims

1. A PCB panel sawing device comprising a fixed plate (1) fixedly mounted on a sawing machine control mechanism, characterized in that, Also include: The top plate (2) and the bottom plate (3) are fixedly installed on the side of the fixed plate (1) away from the control mechanism, and the top plate (2) is located on the upper side of the bottom plate (3), a plurality of connecting columns (4) are fixedly installed between the top plate (2) and the bottom plate (3), and the connecting columns (4) are equidistantly distributed; The number of the plate processing mechanism is two, and the two plate processing mechanisms are installed outside the top plate (2) and the bottom plate (3); The driving mechanism is used for driving the two plate processing mechanisms to rotate, and the driving mechanism is installed on the bottom plate (3); The lifting mechanism is used for adjusting the height of the plate processing mechanism, and the lifting mechanism is installed outside the plate processing mechanism; The driving mechanism includes a driving motor (5) fixedly installed at the center of the upper end of the bottom plate (3), the lower end of the driving shaft of the driving motor (5) is fixedly connected with a disc (6), two symmetrically distributed connecting seats (7) are fixedly installed outside the disc (6), the included angle between the two connecting seats (7) is 90°, the plate processing mechanism includes a driving seat (8), and a plurality of circumferentially equidistantly distributed convex ribs (9) are fixedly arranged outside the driving seat (8); The outer side of the driving seat (8) and the convex rib (9) is movably sleeved with a positioning seat (10) close to the lower end of the driving seat (8), the connection between the positioning seat (10) and the connecting seat (7) is fixed connection, the lower end of the driving seat (8) is rotatably installed with a plug-in seat (11), the lower end center of the plug-in seat (11) is embedded with a pin column (12), the connection between the pin column (12) and the plug-in seat (11) is plug-in connection, and the lower end center of the pin column (12) is fixedly embedded with a cutter (13); The lifting mechanism includes a sleeving seat (21) fixedly sleeved outside the driving seat (8) and the convex rib (9), and the sleeving seat (21) is located on the upper side of the positioning seat (10), a top rod (23) is installed at the rear of the sleeving seat (21), the top rod (23) is fixedly connected with the sleeving seat (21) through a fixing seat (22), both ends of the top rod (23) are movably embedded with ball two (24), and the upper end of the bottom plate (3) is fixedly installed with two symmetrically distributed arc-shaped stop blocks one (25); Two arc-shaped stop blocks one (25) are close to the edge of the bottom plate (3), one end of two arc-shaped stop blocks one (25) close to each other is provided with an inclined slope one, the ball two (24) located at the lower end of the top rod (23) is in rolling contact with the arc-shaped stop block one (25) through the inclined slope one, one connecting column (4) located in front is fixedly installed with an arc-shaped stop block two (26) close to one side of the plate processing mechanism, both ends of the arc-shaped stop block two (26) are provided with inclined slopes two, and the ball two (24) located at the upper end of the top rod (23) is in rolling contact with the arc-shaped stop block two (26) through the inclined slopes two.

2. The PCB milling device according to claim 1, characterized in that: The upper end of the socket (21) is fixedly connected with a spring two (27), and the spring two (27) is movably sleeved on the outer side of the drive seat (8), the upper end of the spring two (27) is fixedly connected with a washer two (28), and the washer two (28) is movably sleeved on the outer side of the drive seat (8), the upper end of the washer two (28) is provided with a circular arc baffle (29), and the circular arc baffle (29) is fixedly installed on the outer side of the top plate (2), and the connection between the washer two (28) and the top plate (2) and the circular arc baffle (29) is sliding contact.

3. The PCB milling device of claim 2, wherein: A plurality of connection assemblies are installed on the outer side of the pin column (12) inside the plug-in seat (11) and are distributed at equal intervals in a circle, the connection assembly comprises a pin rod (14) capable of moving inside the plug-in seat (11), one end of the pin rod (14) close to the pin column (12) is provided with a hemispherical part, the outer side of the pin rod (14) is fixedly sleeved with a washer one (15), and the outer side of the pin rod (14) is movably sleeved with a spring one (16).

4. The PCB milling device of claim 3, wherein: The two ends of the spring one (16) abut against the plug-in seat (11) and the washer one (15) respectively, a hemispherical clamping groove (17) equal in number to the connection assemblies is formed on the outer side of the pin column (12), and the hemispherical part of the pin rod (14) is movably clamped with the pin column (12) through the hemispherical clamping groove (17), and a ball one (18) is movably embedded at one end of the pin rod (14) away from the pin column (12).

5. The PCB panel sawing apparatus according to claim 4, wherein: The outer side of the ball one (18) movably abuts against a positioning tube (19), and the positioning tube (19) is movably sleeved on the outer side of the plug-in seat (11), the connection between the ball one (18) and the positioning tube (19) is rolling contact, and the outer side of the positioning tube (19) is fixedly installed with two symmetrically distributed bent connecting rods (20), and one end of the bent connecting rod (20) away from the positioning tube (19) is fixedly connected with the positioning seat (10).

6. The use method of the PCB milling device according to claim 5, characterized in that: S1: processing stage, the control mechanism on the milling machine drives the fixed plate (1) and the milling mechanism to move forward and backward, left and right, up and down, and processes the PCB; S2: tool changing stage, when the tool (13) is used for a period of time and the temperature rises, the driving motor (5) drives the two milling mechanisms to rotate to change the tool (13), so that the two milling mechanisms are used alternately; S3: rising stage, during the process of changing the tool (13), the ball two (24) at the lower end of the ejector rod (23) on the outer side of the changed milling mechanism moves along the slope one of the circular arc stop block one (25) to the highest point of the circular arc stop block one (25), and in this process, the height of the changed tool (13) is raised. ​ ​ S4: tool (13) replacement stage, the plate mechanism in the process of moving up, a plurality of pin rods (14) will also move up, the ball one (18) moves up to separate the positioning tube (19), at this time, a little force can make the pin rod (14) hemispherical part off the hemispherical slot (17), so that the pin column (12) and the plug-in seat (11) are easy to disassemble, the tool (13) can be replaced.

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