CN201950252U

CN201950252U - Printed circuit board (PCB) grooved bit and drilling machine using same

Info

Publication number: CN201950252U
Application number: CN2010206814161U
Authority: CN
Inventors: 兰保养
Original assignee: 兰保养
Current assignee: XIAMEN CHUANGXIN YIDA PRECISION TECHNOLOGY CO., LTD.
Priority date: 2010-12-27
Filing date: 2010-12-27
Publication date: 2011-08-31
Anticipated expiration: 2020-12-27

Abstract

The utility model provides a printed circuit board (PCB) grooved bit and a drilling machine using the same. The PCB grooved bit comprises a drilling part and an end shrank part connected with the drilling part, wherein the drilling part comprises a drilling head, a drilling neck and a drilling root; the end face of the drilling head is provided with a cutting main channel and cutting secondary channels formed by extending and converging both ends of the cutting main channel; the intersectant supporting points of the cutting main channel and the cutting secondary channels are distributed on the circumference at equal distances; the drilling neck and the drilling root are provided with a spirally extending chip removal main channel; and the chip removal main channel is used for removing chips after a PCB substrate is punched. The PCB grooved bit and the drilling machine using the same have higher hole slot precision, lower processing difficulty and lower cost.

Description

PCB grooved bit and use the rig of this drill bit

[technical field]

The utility model relates to PCB manufacturing technology field, relates in particular to a kind of PCB grooved bit and uses the rig of this drill bit.

[background technology]

Existing P CB substrate adds employing two-point bit punching usually in man-hour; its drill bit all has two ditches from the tip to the root; and formerly have only contact on the end section at 2 with the hole wall of substrate; the bad phenomenon in the porose position of so in use frequent meeting; and the lamination number can not be too high under the slow-speed of revolution (120,000 change) equipment; otherwise the drill bit that fractures easily, so position, the hole precision of its two-point bit is lower, difficulty of processing is big and cost is higher.

[utility model content]

In view of this, be necessary to provide that position, a kind of hole precision is higher, difficulty of processing is less and lower-cost PCB grooved bit and use the rig of this drill bit.

A kind of PCB grooved bit and use the rig of this drill bit, described PCB grooved bit, the end shank that comprises bore portion and connection thereof, described bore portion comprises boring head, boring neck and boring root, the end face of described boring head is provided with the cutting tap drain, extends the cutting counter drain that crosses and form by cutting tap drain two ends, the fulcrum five equilibrium that described cutting tap drain and cutting counter drain intersect is distributed on the circumference, described boring neck and boring root offer a chip removal tap drain that extends spirally, and it is used for carrying out chip removal after the punching of PCB substrate.Further, in above-mentioned drill bit,

Further, in above-mentioned drill bit, described boring root external diameter is consistent with the boring head outer diameter.

The utility model also provides a kind of PCB punching rig, it comprises a drill bit, described drill bit comprises the end shank of bore portion and connection thereof, described bore portion comprises boring head, boring neck and boring root, the end face of described boring head is provided with the cutting tap drain, extends the cutting counter drain that crosses and form by cutting tap drain two ends, the fulcrum five equilibrium that described cutting tap drain and cutting counter drain intersect is distributed on the circumference, described boring neck and boring root offer a chip removal tap drain that extends spirally, and it is used for carrying out chip removal after the punching of PCB substrate.

Further, in above-mentioned rig, described boring root external diameter is consistent with the boring head outer diameter.

PCB grooved bit of the present utility model and use the end profile of boring head of the rig of this drill bit roughly to be triangular shape, it is end-grain cutting ditch and groove 4 times altogether formerly, but boring neck and boring root in the bore portion rear end have only a dissected valley groove to finish the chip removal function, improve position, the hole precision after drill bit rigidity and the boring, and can promote the lamination number of plies in when boring to a certain extent; In addition,, reduce processing cost, further improved the unit output value of board because the minimizing of the groove of processing has reduced the difficulty of processing of drill bit and shortened process time.

[description of drawings]

Fig. 1 is the structural representation of the utility model PCB grooved bit preferred embodiment;

Fig. 2 is the structural representation of bore portion among Fig. 1;

Fig. 3 is the sectional view of the end face of boring head among Fig. 2.

[specific embodiment]

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in detail.

See also Fig. 1, Fig. 1 is the structural representation of the utility model PCB grooved bit preferred embodiment.Described PCB grooved bit comprises bore portion 1 and the end shank 2 that connects thereof.The external diameter of described bore portion 1 is less than the external diameter of end shank 2.

See also Fig. 2, Fig. 2 is the structural representation of bore portion 1 among Fig. 1.The bore portion 1 of described PCB grooved bit comprises boring head 12, boring neck 14 and boring root 16, and described boring neck 14 and boring root 16 offer a chip removal tap drain that extends spirally (figure is mark not), are used for carrying out chip removal after the punching of PCB substrate.

See also Fig. 3, Fig. 3 is the sectional view of the end face of boring head among Fig. 2.The end profile of boring head 12 roughly is triangular shape, and it is provided with cutting tap drain 122, extends the cutting counter drain 124,126 that crosses and form by cutting tap drain 122 two ends.Fulcrum A, B, C five equilibrium that described cutting tap drain 122 and cutting counter drain 124,126 intersect are distributed on the circumference.124,126 processing of cutting counter drain head, back segment is not processed, and boring root 16 external diameters are consistent with boring head 12 external diameters, to promote the rigidity of drill bit.

The utility model PCB grooved bit when boring procedure, boring head 12 end face 3 fulcrum A, B, C and processed PCB substrate contacts.Drill bit is in the rotation of process high speed, and generally between 100KRPM to 400KRPM, the drill bit high speed rotating drives drill bit head 12 high speed rotating simultaneously, and can enter substrate with certain feed speed.After entering substrate, the main cutting edge of cutting tap drain 122 can cut substrate the very first time, and a bits that downcut is discharged by described chip removal tap drain, cutting counter drain 124 can cut again to the part that cutting tap drain 122 was cut under the situation of high speed rotating, cutting counter drain 126 is after repeating to do the cutwork of cutting at one time counter drain 124, also the bits that cutting tap drain 122 is not discharged fully exist in the cutting counter drain 124,126, and therefore the bits band that will have counter drain after bit bore is finished has certain chip removal function from endoporus.The utility model PCB grooved bit has 3 fulcrum A, B, C to finish a title function, the stability when having guaranteed to keep boring in boring procedure.

In addition, the utility model also provides a kind of rig that uses above-mentioned grooved bit.

Than prior art, PCB grooved bit of the present utility model and use the end profile of boring head of the rig of this drill bit roughly to be triangular shape, it is end-grain cutting ditch and groove 4 times altogether formerly, but boring neck and boring root in the bore portion rear end have only a dissected valley groove to finish the chip removal function, drill bit rigidity and boring metapore position precision have been improved, its CPK value promotes 0.3 approximately, and can promote the lamination number of plies when holing to a certain extent; And because position, hole precision is good, the many wearing and tearing of drill bit a bit can also be processed, and can increase the grinding number of times, promote the punching sum more than 1.5 times, save drill bit cost 40-50%; In addition,, change the brill time and increased the part process velocity, reduced processing cost, further improved the unit output value of board thereby reduced because the minimizing of the groove of processing has reduced the difficulty of processing of drill bit and shortened process time.

The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.

Claims

1. PCB grooved bit, the end shank that comprises bore portion and connection thereof, it is characterized in that, described bore portion comprises boring head, boring neck and boring root, the end face of described boring head is provided with the cutting tap drain, extends the cutting counter drain that crosses and form by cutting tap drain two ends, the fulcrum five equilibrium that described cutting tap drain and cutting counter drain intersect is distributed on the circumference, described boring neck and boring root offer a chip removal tap drain that extends spirally, and it is used for carrying out chip removal after the punching of PCB substrate.

2. grooved bit according to claim 1 is characterized in that, described boring root external diameter is consistent with the boring head outer diameter.

3. PCB punching rig, it comprises a drill bit, described drill bit comprises the end shank of bore portion and connection thereof, it is characterized in that, described bore portion comprises boring head, boring neck and boring root, the end face of described boring head is provided with the cutting tap drain, extends the cutting counter drain that crosses and form by cutting tap drain two ends, the fulcrum five equilibrium that described cutting tap drain and cutting counter drain intersect is distributed on the circumference, described boring neck and boring root offer a chip removal tap drain that extends spirally, and it is used for carrying out chip removal after the punching of PCB substrate.

4. punching rig according to claim 3 is characterized in that, described boring root external diameter is consistent with the boring head outer diameter.