CN201596803U - Micro-drill and machining appliance using same - Google Patents
Micro-drill and machining appliance using same Download PDFInfo
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- CN201596803U CN201596803U CN2009203533483U CN200920353348U CN201596803U CN 201596803 U CN201596803 U CN 201596803U CN 2009203533483 U CN2009203533483 U CN 2009203533483U CN 200920353348 U CN200920353348 U CN 200920353348U CN 201596803 U CN201596803 U CN 201596803U
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- chip pocket
- knife face
- assisted machining
- back knife
- apex point
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Abstract
The utility model discloses a micro-drill and a machining appliance using the same. The micro-drill includes a tip and a body, a holding groove spirally ascending is arranged on the body and includes a long holding groove and a short holding groove, the short holding groove is arranged at a position, corresponding to the tip, on the body, and the long holding groove extends from the tip position to the tail end of the body. Depth of the long holding groove of the holding groove, spirally ascending, of the body is larger than that of the short holding groove. Since the single long holding groove occupies most of the body, and core thickness of a groove body is increased, drill body of the micro-drill has better rigidity and difficult breakage, thereby being capable of further reducing size of the micro-drill and prolonging service life. Additionally, aperture of a hole drilled by the micro-drill can be smaller and has higher machining precision.
Description
Technical field
The utility model relates to the manufacturing field of printed circuit board (PCB) (be called for short PCB), in particular, relates to a kind of carbide alloy microbit of the PCB of being used for circuit board and has used the processing apparatus of this microbit.
Background technology
The structure of PCB microbit commonly used as shown in Figure 1-Figure 3 at present, microbit comprises apex point 1 and bores body 2, the shape of its apex point as shown in Figure 2, include the chisel edge between 11, two main cutting edges of main cutting edge of two symmetries and be positioned at two helical front cutting edges 12 of the rear side of main cutting edge; Formed major first flank 14, the second back knife face 15, the 3rd back knife face 16, the 4th back knife face 17 as shown in FIG. between described main cutting edge and front cutting edge and the chisel edge respectively; Between the described major first flank 14 and the second back knife face 15, and the 3rd back knife face 16 be formed with intersection 13 with the 4th back between the knife face 17, the length of described intersection is roughly consistent with the length of brill body diameter.Described spiral front cutting edge extends to boring on the Shenzhu face, forms the spiralling chip pocket 21 of two symmetries, and as shown in Figure 3, the degree of depth of chip pocket is increasing evenly distribution on the brill Shenzhu face.When carrying out grinding, front cutting edge contacts with the hole wall that grinding goes out, and forms the strong point.
For existing little brill, because it has the helicla flute that is all long chip pocket of two symmetries, therefore the groove depth of chip pocket is less to guarantee its rigidity for the core that guarantees to bore core is thick, is difficult to further reduce on the basis of the rigidity that guarantees little brill the size of little brill.Along with the development of PCB technology, the brill footpath requires more and more littler, and for microbit, along with reducing of bit size, existing structure is remarkable all the more to the influence of the breaking of rod, has limited to the possibility that bit size is further reduced.
The utility model content
For overcoming above-mentioned defective, technical problem to be solved in the utility model provides the processing apparatus that a kind of rigidity better is difficult for the microbit of the breaking of rod and has used this microbit.
The purpose of this utility model is achieved through the following technical solutions:
A kind of microbit comprises apex point and bores body that described brill body is provided with spiralling chip pocket; Wherein, the spiralling chip pocket of described brill body comprises a long chip pocket and at least one short chip pocket, and described short chip pocket only is arranged on and bores the position of body corresponding to apex point, and long chip pocket extends to brill body end from the position of apex point; In the spiralling chip pocket of described brill body, the groove depth of long chip pocket is greater than the groove depth of short chip pocket.
The length of described short chip pocket account for long chip pocket length 10%～20%.
Described apex point comprises a main cutting edge, at least two assisted machining swords, and at least three front cutting edge being connected with the assisted machining sword with main cutting edge respectively.Because being provided with at least two assisted machining swords replaces an existing main cutting edge, add another main cutting edge, make that the cutting edge part multiple spot of little brill is stressed, strengthened the rigidity of little brill apex point part, be difficult for the breaking of rod, thereby under the prerequisite that guarantees enough rigidity, can further reduce the size of microbit.In order to improve the symmetry of single long chip pocket, design at least two assisted machining swords and carry out the multiple spot supplemental support, can strengthen the stability that little brill bores body.
Have at least between the major first flank, the second back knife face of and apex point in the described assisted machining sword and the 3rd back knife face and the 4th back knife face between the intersection that forms crossing.Because reaching the intersection that forms between the 3rd back knife face 16 and the 4th back knife face 17 between the major first flank of assisted machining sword and apex point, the second back knife face intersects, intersection that intersects and assisted machining sword can certain each other angles, can better cut, prolong the service life of little brill.
The length of the intersection that described and assisted machining sword intersect is less than the length of micro-drill diameter.By an assisted machining sword with between the major first flank of apex point, the second back knife face and the intersection length of formation between the 3rd back knife face 16 and the 4th back knife face 17, make the length of intersection less than the length of micro-drill diameter, such design, reduce the length of intersection, reduced the frictional force that the intersection place of apex point is subjected to; And because the common cutting that forms an angle between assisted machining sword and the intersection, the frictional force that apex point partly is subjected to is littler, is difficult for taking place the breaking of rod, therefore can further reduce the size of little brill.
Described assisted machining sword is two, comprises the first assisted machining sword and the second assisted machining sword; Described front cutting edge is three, is connected with two assisted machining swords with main cutting edge respectively; Wherein, second of described main cutting edge and the apex point back knife face and the 4th back knife face intersect; The 4th back knife face of the described first assisted machining sword and intersection and apex point, the 3rd back knife face, the second back knife face intersect; The described second assisted machining sword only is connected with the second back knife face of apex point.Such design becomes three strong points on the sidewall by three front cutting edges are set, and can keep cutting equilibrium of forces preferably, overcomes asymmetric cutting.
Described assisted machining sword is three, comprises the first assisted machining sword, the second assisted machining sword and the 3rd assisted machining sword; Described front cutting edge is four, is connected with three assisted machining swords with main cutting edge respectively; Wherein, second of described main cutting edge and the apex point back knife face and the 4th back knife face intersect; The 4th back knife face of the described first assisted machining sword and intersection and apex point, the 3rd back knife face, the second back knife face intersect; The described second assisted machining sword only is connected with the second back knife face of apex point; Described the 3rd assisted machining sword only is connected with the 4th back knife face of apex point.Such design has further reduced the frictional force of little brill and sidewall, and becomes four strong points on the sidewall by four front cutting edges are set, and can better keep cutting equilibrium of forces, overcomes asymmetric cutting.
A kind of processing apparatus that uses above-mentioned microbit, described microbit comprise apex point and bore body that described brill body is provided with spiralling chip pocket; Wherein, the spiralling chip pocket of described brill body comprises a long chip pocket and at least one short chip pocket, and described short chip pocket only is arranged on and bores the position of body corresponding to apex point, and long chip pocket extends to brill body end from the position of apex point; In the spiralling chip pocket of described brill body, the groove depth of long chip pocket is greater than the groove depth of short chip pocket.
The utility model is owing to mainly carry out chip removal by long chip pocket, and the short chip pocket of front end only works the chip removal effect of assisting.On the basis of single groove chip removal,, therefore can further increase the groove depth of this long chip pocket because the core of the cell body of long chip pocket part is thick bigger, strengthened the chip removal ability of this long chip pocket, little brill like this adds man-hour and the hole wall friction is little, position, hole precision height, and the life-span is longer.And because brill body major part is all single long chip pocket, so the thick increase of the core of cell body, the rigidity that little brill drill body part divides is better, is difficult for the breaking of rod, thereby can further reduces the size of little brill, longer service life.And use the processing apparatus of microbit described in the utility model, and the aperture of boring can be littler, and machining accuracy is higher.
Description of drawings
Fig. 1 is the structural representation of microbit of the prior art;
Fig. 2 is the structural representation of the apex point of microbit of the prior art;
Fig. 3 is the cross sectional representation that the drill body part of microbit of the prior art divides;
Fig. 4 is the structural representation of apex point of the microbit of the utility model embodiment one;
Fig. 5 is that the brill body of microbit of the utility model embodiment one is near the cross sectional representation of apex point position;
Fig. 6 is that the brill body of microbit of the utility model embodiment one is away from the cross sectional representation of apex point position;
Fig. 7 is the structural representation of the microbit of the utility model embodiment one;
Fig. 8 is the structural representation of apex point of the microbit of the utility model embodiment two.
Wherein: 1, apex point; 11, main cutting edge; 12, front cutting edge; 13, intersection; 14, major first flank; 15, the second back knife face; 16, the 3rd back knife face; 17, the 4th back knife face; 2, bore body; 21, chip pocket;
3, apex point; 301, the first assisted machining sword; 302, the second assisted machining sword; 303, the 3rd assisted machining sword; 31, main cutting edge; 32, front cutting edge; 33, intersection; 34, major first flank; 35, the second back knife face; 36, the 3rd back knife face; 37, the 4th back knife face; 4, bore body; 41, long chip pocket; 42, lack chip pocket.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and preferred embodiment.
The structure of first kind of embodiment of microbit of the present invention is shown in Fig. 4-7, and shown microbit comprises apex point 3 and bore body 4, and described apex point 3 comprises a main cutting edge 31, two assisted machining swords, and three front cutting edges 32; Described assisted machining sword comprises the first assisted machining sword 301 and the second assisted machining sword 302; Between the major first flank of the first assisted machining sword 301 and apex point, the second back knife face and the intersection 33 that forms between the 3rd back knife face 16 and the 4th back knife face 17 crossing, and make the length of intersection 33 less than the length of micro-drill diameter; Described front cutting edge 32 is connected with two assisted machining swords with main cutting edge 31 respectively; Wherein, described main cutting edge 31 intersects with the major first flank 34 and the 4th back knife face 37 of apex point; The described first assisted machining sword 301 intersects with the 4th back knife face 37, the 3rd back knife face 36, the second back knife face 35 of intersection 33 and apex point; The described second assisted machining sword 302 only is connected with the second back knife face 35 of apex point.
The function class of assisted machining sword and main cutting edge seemingly, but different sizes.Because reaching the intersection 33 that forms between the 3rd back knife face 16 and the 4th back knife face 17 between the major first flank of the first assisted machining sword 301 and apex point, the second back knife face intersects, intersection that intersects and assisted machining sword can certain each other angles, can better cut, prolong the service life of little brill.And by the first assisted machining sword 301 with intersection 33 length, make the length of intersection less than the length of micro-drill diameter, such design has reduced the length of intersection, has reduced the frictional force that intersection is subjected to; And because the common cutting that forms an angle between assisted machining sword and the intersection, the frictional force that apex point partly is subjected to is littler, is difficult for taking place the breaking of rod, therefore can further reduce the size of little brill.Become three strong points on the sidewall by three front cutting edges are set, can keep cutting equilibrium of forces preferably, overcome asymmetric cutting.
As Fig. 5, shown in Figure 6, described spiral front cutting edge 32 extends to boring on the Shenzhu face, has formed spiralling chip pocket; The chip pocket that bores body comprises at least one long chip pocket 41 and two short chip pockets 42, and described short chip pocket 42 only is arranged on and bores the position of body corresponding to apex point, and long chip pocket 41 extends to brill body 4 ends from the position of apex point 3.Wherein, the groove depth of long chip pocket 41 is greater than the groove depth of short chip pocket 42.The length of described short chip pocket account for long chip pocket length 10%～20%.
Such design makes chip removal mainly by long chip pocket, and the short chip pocket of front end only plays auxiliary chip removal effect.For existing little brill, because it has the helicla flute that is all long chip pocket of two symmetries, therefore the groove depth of chip pocket is less to guarantee its rigidity for the core that guarantees to bore core is thick, is difficult to further reduce on the basis of the rigidity that guarantees little brill the size of little brill.And in the utility model, bore the body major part and be all single long chip pocket, so the thick increase of the core of cell body, the rigidity that little brill drill body part divides is better, is difficult for the breaking of rod, thereby can further reduces the size of little brill, longer service life.On the basis of single groove chip removal, because the core of the cell body of long chip pocket part is thick bigger, therefore can further increase the groove depth of this long chip pocket, strengthened the chip removal ability of this long chip pocket.Little brill like this adds man-hour and the hole wall friction is little, position, hole precision height, and the life-span is longer.In order to improve the symmetry of single long chip pocket, design at least two assisted machining swords and carry out the multiple spot supplemental support, can strengthen the stability that little brill bores body.
Microbit of the present invention can have plural assisted machining sword, is not limited to two assisted machining swords in the foregoing description; The structure of the microbit of another embodiment of the present invention as shown in Figure 8, with different in the foregoing description be, the shape that described microbit apex point is overlooked is halberd shape, it comprises a main cutting edge 31 and three assisted machining swords, and described assisted machining sword comprises the first assisted machining sword 301, the second assisted machining sword 302 and the 3rd assisted machining sword 303; Corresponding front cutting edge 32 is four, is connected with three assisted machining swords with main cutting edge 31 respectively; Wherein, described main cutting edge 31 intersects with the major first flank 34 and the 4th back knife face 37 of apex point; Between the major first flank of described first assisted machining sword 301 and apex point, the second back knife face and the 4th back knife face 37, the 3rd back knife face 36, the second back knife face 35 of intersection 33 that forms between the 3rd back knife face 16 and the 4th back knife face 17 and apex point 1 crossing; The described second assisted machining sword 302 only is connected with the second back knife face 35 of apex point; Described the 3rd assisted machining sword 303 only is connected with the 4th back knife face 37 of apex point.Such design has further reduced the frictional force of little brill and sidewall, and becomes four strong points on the sidewall by four front cutting edges are set, and can better keep cutting equilibrium of forces, overcomes asymmetric cutting.
And the chip pocket of the brill body of its correspondence also is four, comprise at least one long chip pocket 41 and three short chip pockets 42, described short chip pocket 42 only is arranged on and bores body 4 corresponding to the position near apex point 3, and long chip pocket 41 extends to brill body 4 ends from the position of apex point 3.Wherein, the groove depth of long chip pocket 41 is greater than the groove depth of short chip pocket 42.
The invention also discloses a kind of processing apparatus that uses above-mentioned microbit, it comprises aforesaid microbit and anchor clamps thereof.Use the processing apparatus of microbit described in the utility model, the aperture of boring can be littler, and machining accuracy is higher.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (8)
1. a microbit comprises apex point and bores body, and described brill body is provided with spiralling chip pocket; It is characterized in that the spiralling chip pocket of described brill body comprises a long chip pocket and at least one short chip pocket, described short chip pocket only is arranged on and bores the position of body corresponding to apex point, and long chip pocket extends to brill body end from the position of apex point; In the spiralling chip pocket of described brill body, the groove depth of long chip pocket is greater than the groove depth of short chip pocket.
2. a kind of microbit as claimed in claim 1 is characterized in that, the length of described short chip pocket account for long chip pocket length 10%～20%.
3. a kind of microbit as claimed in claim 1 is characterized in that, described apex point comprises a main cutting edge, at least two assisted machining swords, and at least three front cutting edge being connected with the assisted machining sword with main cutting edge respectively.
4. a kind of microbit as claimed in claim 3 is characterized in that, have at least between the major first flank, the second back knife face of and apex point in the described assisted machining sword and the 3rd back knife face and the 4th back knife face between the intersection that forms crossing.
5. a kind of microbit as claimed in claim 4 is characterized in that, the length of the intersection that described and assisted machining sword intersect is less than the length of micro-drill diameter.
6. as claim 3 or 4 or 5 described a kind of microbits, it is characterized in that described assisted machining sword is two, comprise the first assisted machining sword and the second assisted machining sword; Described front cutting edge is three, is connected with two assisted machining swords with main cutting edge respectively; Wherein, second of described main cutting edge and the apex point back knife face and the 4th back knife face intersect; The 4th back knife face of the described first assisted machining sword and intersection and apex point, the 3rd back knife face, the second back knife face intersect; The described second assisted machining sword only is connected with the second back knife face of apex point.
7. as claim 3 or 4 or 5 described a kind of microbits, it is characterized in that described assisted machining sword is three, comprise the first assisted machining sword, the second assisted machining sword and the 3rd assisted machining sword; Described front cutting edge is four, is connected with three assisted machining swords with main cutting edge respectively; Wherein, second of described main cutting edge and the apex point back knife face and the 4th back knife face intersect; The 4th back knife face of the described first assisted machining sword and intersection and apex point, the 3rd back knife face, the second back knife face intersect; The described second assisted machining sword only is connected with the second back knife face of apex point; Described the 3rd assisted machining sword only is connected with the 4th back knife face of apex point.
8. one kind has been used the processing apparatus as the arbitrary described microbit of claim 1-7, and described microbit comprises apex point and bore body that described brill body is provided with spiralling chip pocket; It is characterized in that the spiralling chip pocket of described brill body comprises a long chip pocket and at least one short chip pocket, described short chip pocket only is arranged on and bores the position of body corresponding to apex point, and long chip pocket extends to brill body end from the position of apex point; In the spiralling chip pocket of described brill body, the groove depth of long chip pocket is greater than the groove depth of short chip pocket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203533483U CN201596803U (en) | 2009-12-25 | 2009-12-25 | Micro-drill and machining appliance using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203533483U CN201596803U (en) | 2009-12-25 | 2009-12-25 | Micro-drill and machining appliance using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201596803U true CN201596803U (en) | 2010-10-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203533483U Expired - Fee Related CN201596803U (en) | 2009-12-25 | 2009-12-25 | Micro-drill and machining appliance using same |
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| Country | Link |
|---|---|
| CN (1) | CN201596803U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767217B (en) * | 2009-12-25 | 2012-11-14 | 深圳市金洲精工科技股份有限公司 | Micro-bit and processing apparatus using the micro-bit |
| CN102837033A (en) * | 2011-06-20 | 2012-12-26 | 华伟纳精密工具（昆山）有限公司 | UC-shaped micro drill with asymmetric groove length and indexing angle |
-
2009
- 2009-12-25 CN CN2009203533483U patent/CN201596803U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767217B (en) * | 2009-12-25 | 2012-11-14 | 深圳市金洲精工科技股份有限公司 | Micro-bit and processing apparatus using the micro-bit |
| CN102837033A (en) * | 2011-06-20 | 2012-12-26 | 华伟纳精密工具（昆山）有限公司 | UC-shaped micro drill with asymmetric groove length and indexing angle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101006 Termination date: 20161225 |