CN116890399A - PCD drill bit and processing method thereof - Google Patents
PCD drill bit and processing method thereof Download PDFInfo
- Publication number
- CN116890399A CN116890399A CN202311075489.4A CN202311075489A CN116890399A CN 116890399 A CN116890399 A CN 116890399A CN 202311075489 A CN202311075489 A CN 202311075489A CN 116890399 A CN116890399 A CN 116890399A
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- Prior art keywords
- drill
- pcd
- cutting edge
- drill bit
- face
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Links
- 238000003672 processing method Methods 0.000 title abstract description 6
- 238000005520 cutting process Methods 0.000 claims abstract description 61
- 238000005553 drilling Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims description 35
- 238000003466 welding Methods 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 238000003754 machining Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000005498 polishing Methods 0.000 description 8
- 239000011324 bead Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
- B28D1/146—Tools therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
The invention relates to the technical field of drill bits, and particularly discloses a PCD drill bit and a processing method thereof. When the drilling processing is carried out on the workpiece to be processed, the edge side edge of the concave cutting edge surface rotates at a high speed to firstly contact and grind the workpiece to be processed, so that the grinding and drilling of the workpiece to be processed can be rapidly and smoothly realized, the occurrence of cracks in holes is avoided, the yield of products is improved, certain resource waste is reduced, and the production cost of enterprises is reduced.
Description
Technical Field
The invention relates to the technical field of drill bits, in particular to a PCD drill bit and a processing method thereof.
Background
The PCD drill bit is a diamond polycrystalline drill bit, and is generally used for drilling a to-be-machined piece made of hard fragile materials such as monocrystalline silicon, quartz, ceramic and the like, the center cutting face of the front end angle of the conventional PCD drill bit is a conical convex cutting face, namely the center point of the front end angle is the most protruding part, when the PCD drill bit is used for drilling the hard fragile material, the center point of the front end angle is firstly in contact grinding with the to-be-machined piece, and when the PCD drill bit is used for drilling the hard fragile material, the rotating speed of the center point is small and approaches to a static state, so that cracks are easily generated on the to-be-machined piece, and when the size of the cracks is larger than the aperture of a hole, the to-be-machined piece can only be scrapped, so that the yield of a product is low, the resource waste is large, and the production cost of enterprises is increased.
Disclosure of Invention
The invention aims to provide a PCD drill bit so as to solve the technical problems.
In order to achieve the above purpose, the technical scheme of the invention is as follows: a PCD drill bit comprises a drill handle and a drill needle, wherein a drill rod is formed by extending one end of the drill handle, the drill needle is made of PCD composite materials, one end of the drill needle is connected to the drill rod, a front end angle is formed at the other end of the drill needle, a plurality of centrosymmetric cutting edges are formed on the front end angle, each cutting edge comprises a central cutting edge face positioned in the middle and an inclined cutting edge face positioned at the edge, and each central cutting edge face is a concave cutting edge face.
Preferably, the concave facet is progressively higher from the center toward the edge.
Preferably, the inclined blade faces are two groups and are respectively positioned at two sides of the central blade face, and each group of inclined blade faces comprises a first inclined blade face, a second inclined blade face and a third inclined blade face which are sequentially arranged from the central blade face towards the drill rod.
Preferably, the two first inclined facets, the two second inclined facets, and the two third inclined facets are all centrosymmetric.
Preferably, the drill point is provided with two spiral chip grooves.
Preferably, the depth of the third inclined facet tapers from the central facet towards the drill rod.
Preferably, one side of the third inclined facet is convexly formed with a grinding lug.
Preferably, the grinding rib comprises a first grinding rib and a second grinding rib which are sequentially arranged from the central edge surface towards the drill rod direction, and the protruding height of the first grinding rib is larger than that of the second grinding rib.
Preferably, the drill handle, the drill rod and the drill needle are coaxially and sequentially arranged, the outer diameter of the drill rod is matched with that of the drill needle, and one end of the drill needle is fixedly connected to the drill rod in a welding mode.
The invention also provides a processing method for the PCD drill bit, which comprises the following processing steps:
s100, welding: welding a drill point blank and a drill handle blank which are made of PCD composite materials together through high-temperature heating of a welding material, so that a first-stage material is formed;
s200, step difference: processing the outer diameter and the cutting edge surface of the first-stage material, and detecting the outer diameter and the concentricity of the first-stage material by a high-precision detector until the first-stage material is processed to meet the required size, so as to form a second-stage material;
s300, opening a spiral chip groove: processing the second-stage material with the outer diameter and the cutting surface processed by laser to form a third-stage material;
s400, cutting an inclined cutting edge surface at the front end angle: sharpening the front end angle of the material in the third stage to process an inclined blade surface, thereby forming a material in the fourth stage;
s500, forming a central cutting face: and removing the convex part in the center of the front end angle to form a concave cutting edge surface, wherein the concave cutting edge surface is required to form a relief angle, and finally obtaining the finished PCD drill bit.
The invention has the following beneficial effects:
the drilling rod is formed by extending one end of the drilling rod, the drilling rod is made of PCD composite materials, one end of the drilling rod is connected to the drilling rod, a front end angle is formed at the other end of the drilling rod, a plurality of centrally symmetrical cutting edges are formed at the front end angle, each cutting edge comprises a central cutting edge surface positioned in the middle and an inclined cutting edge surface positioned at the edge, each central cutting edge surface is a concave cutting edge surface, when a workpiece to be drilled is processed, the edge side edges of the concave cutting edges rotate at high speed to firstly contact with the workpiece to be processed, grinding and drilling of the workpiece to be processed can be rapidly and smoothly realized, cracks are avoided, the yield of products is improved, certain resource waste is reduced, and the production cost of enterprises is reduced.
Drawings
FIG. 1 is a top view and a partially enlarged schematic illustration of embodiment 1 of the present invention;
FIG. 2 is a front view and a partially enlarged schematic illustration of embodiment 1 of the present invention;
FIG. 3 is a schematic view and a partially enlarged schematic view of embodiment 1 of the present invention at an angle;
FIG. 4 is a schematic view and a partially enlarged schematic view of embodiment 1 of the present invention at another angle;
FIG. 5 is a top view and a partially enlarged schematic illustration of embodiment 2 of the present invention;
FIG. 6 is a front view and a partially enlarged schematic illustration of embodiment 2 of the present invention;
FIG. 7 is a schematic view and a partially enlarged schematic view of embodiment 2 of the present invention at an angle;
the drawings are marked: 1 drill shank, 2 drill rod, 3 drill needle, 4 concave cutting edge face, 5 plane cutting edge face, 6 first inclined cutting edge face, 7 second inclined cutting edge face, 8 third inclined cutting edge face, 9 first grinding bead, 10 second grinding bead, 11 spiral chip groove.
Detailed Description
For further illustration of the various embodiments, the invention is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present invention. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.
Example 1.
Referring to fig. 1-4, as an embodiment of the present invention, a PCD drill is provided, including a drill shank 1 and a drill needle 3, one end of the drill shank 1 extends to form a drill rod 2, the drill needle 3 is a PCD composite drill needle, the drill shank 1, the drill rod 2 and the drill needle 3 are coaxially and sequentially arranged, an outer diameter of the drill rod 2 is adapted to an outer diameter of the drill needle 3, one end of the drill needle 3 is fixedly connected to the drill rod 2 by welding, a front end angle is formed at the other end, a plurality of edges with central symmetry are formed on the front end angle, the edges include a central edge surface located in the middle and an inclined edge surface located at the edge, the central edge surface is a concave edge surface 4, the concave edge surface 4 gradually increases from the center to the edge, i.e. the concave edge surface 4 gradually inclines inwards from the edge to the center, as shown in fig. 3, a concave angle a of the concave edge surface 4 is smaller than 180 °.
The PCD drill bit is used for drilling a workpiece to be machined made of hard fragile materials such as monocrystalline silicon, quartz and ceramic, when the workpiece to be drilled is drilled, as the center point of the front end angle is arranged to be concave, the edge side edge of the concave cutting face 4 is firstly contacted with the workpiece to be machined for grinding, and when the workpiece is rotated at a high speed, the rotating speed of the edge side edge of the concave cutting face 4 is higher, so that the workpiece to be drilled can be quickly and smoothly ground, holes are prevented from generating cracks, the yield of products is improved, certain resource waste is reduced, and the production cost of enterprises is reduced.
In this embodiment, the inclined blade faces are two groups, and are respectively located at two sides of the central blade face, each group of inclined blade faces comprises a first inclined blade face 6, a second inclined blade face 7 and a third inclined blade face 8 which are sequentially arranged from the central blade face towards the drill rod 2, the inclined angles of the first inclined blade face 6, the second inclined blade face 7 and the third inclined blade face 8 are gradually inclined towards the central axis from the central blade face towards the drill rod 2, and from the two first inclined blade faces 6, the two second inclined blade faces 7 and the two third inclined blade faces 8 are all in central symmetry. Namely, the concave blade surface 4 is used for primarily grinding the concave hole formed by the workpiece to be processed, and then the concave hole is gradually enlarged through three layers of the first inclined blade surface 6, the second inclined blade surface 7 and the third inclined blade surface 8, so that the hole meeting the requirement of the aperture size is finally formed. Compared with the one-time grinding forming processing process of the drill bit with the front end angle in the linear cone angle structure in the prior art, the hole wall quality of the hole processed by the front end angle of the multi-inclined-surface structure in the embodiment is better, no damaged layer exists, and the smoothness is higher.
In this embodiment, the drill point 3 is provided with two spiral chip grooves 11, and the helix angle of the spiral chip grooves 11 is 30 °. However, it should be understood by those skilled in the art that in other embodiments, the helix angle of the helical flute 11 may be any other angle from 10 ° to 55 °, and is not limited to the 30 ° disclosed in the present embodiment, and those skilled in the art may specifically design according to specific needs.
In this embodiment, the depth of the third inclined blade surface 8 gradually decreases from the central blade surface toward the drill rod 2, one side of the third inclined blade surface 8 protrudes to form a polishing rib, the polishing rib comprises a first polishing rib 9 and a second polishing rib 10 which are sequentially arranged from the central blade surface toward the drill rod 2, and the protruding height of the first polishing rib 9 is greater than that of the second polishing rib 10.
The invention also provides a processing method for the PCD drill bit, which comprises the following processing steps:
s100, welding: welding a drill point blank and a drill handle blank which are made of PCD composite materials together through high-temperature heating of a welding material, so that a first-stage material is formed;
s200, step difference: processing the outer diameter and the cutting edge surface of the first-stage material, and detecting the outer diameter and the concentricity of the first-stage material by a high-precision detector until the first-stage material is processed to meet the required size, so as to form a second-stage material;
s300, opening a spiral chip groove 11: processing the second-stage material with the outer diameter and the cutting surface processed by laser into a spiral chip groove 11, thereby forming a third-stage material;
s400, cutting an inclined cutting edge surface at the front end angle: sharpening the front end angle of the material in the third stage to process an inclined blade surface, so that a material in the fourth stage is formed, and the smoothness of the inner wall of the hole of the workpiece to be machined is improved;
s500, forming a central cutting face: and removing the convex part in the center of the front end angle to form a concave cutting edge surface 4, and forming a relief angle on the concave cutting edge surface 4 to finally obtain the finished PCD drill bit.
Wherein, step S300 includes:
s310, polishing: and polishing the second-stage material after the spiral chip groove 11 is processed by using a diamond grinding wheel, so that the smoothness of the spiral chip groove 11 is improved, and chip removal is facilitated.
Wherein, the relief angle is the included angle between the cutting edge surface and the rear cutting surface, and the size of the relief angle is generally between 6 degrees and 12 degrees. The relief angle has the function of enhancing the strength and rigidity of the PCD drill bit and keeping the stability of the cutter.
Embodiment 2 for the sake of brevity, this embodiment mainly describes differences from embodiment 1.
Referring to fig. 5-7, as an embodiment of the present invention, a PCD drill is further provided, wherein the center cutting edge surface of the PCD drill is a flat cutting edge surface 5, as shown in fig. 6, the flat cutting edge surface can be understood as a concave cutting edge surface with a concave angle b of 180 degrees, that is, the flat cutting edge surface 5 is perpendicular to the central axis of the drill 3, when the workpiece is drilled, the center point of the front end angle is on the flat cutting edge surface 5, so that the whole plane of the flat cutting edge surface 5 is firstly contacted with the workpiece to be polished, and when the workpiece is rotated at a high speed, the rotation speed of the flat cutting edge surface 5 is larger, thereby the grinding and drilling of the workpiece to be processed can be realized rapidly and smoothly, the occurrence of cracks of holes is avoided, the yield of products is improved, the certain resource waste is reduced, and the production cost of enterprises is reduced.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A PCD drill bit, characterized by: the drilling device comprises a drill handle and a drill needle, wherein a drill rod is formed at one end of the drill handle in an extending mode, the drill needle is made of PCD composite materials, one end of the drill needle is connected to the drill rod, a front end angle is formed at the other end of the drill needle, a plurality of centrally symmetrical cutting edges are formed on the front end angle, each cutting edge comprises a central cutting edge face located in the middle and an inclined cutting edge located at the edge, and each central cutting edge face is a concave cutting edge face.
2. The PCD drill bit of claim 1, wherein: the concave cutting surface gradually increases from the center to the edge.
3. The PCD drill bit of claim 1, wherein: the inclined blade faces are two groups and are respectively positioned at two sides of the central blade face, and each group of inclined blade faces comprises a first inclined blade face, a second inclined blade face and a third inclined blade face which are sequentially arranged from the central blade face towards the drill rod.
4. A PCD drill bit as claimed in claim 3, wherein: the two first inclined blade faces, the two second inclined blade faces and the two third inclined blade faces are all in central symmetry.
5. The PCD drill bit of claim 1, wherein: two spiral chip grooves are formed in the drill point.
6. A PCD drill bit as claimed in claim 3, wherein: the depth of the third inclined blade surface gradually decreases from the central blade surface towards the drill rod.
7. A PCD drill bit as claimed in claim 3, wherein: one side of the third inclined blade surface is convexly provided with a grinding convex edge.
8. The PCD drill bit of claim 7, wherein: the grinding rib comprises a first grinding rib and a second grinding rib which are sequentially arranged from the central edge face towards the direction of the drill rod, and the protruding height of the first grinding rib is larger than that of the second grinding rib.
9. The PCD drill bit of claim 1, wherein: the drill stem, the drill rod and the drill needle are coaxially and sequentially arranged, the outer diameter of the drill rod is matched with the outer diameter of the drill needle, and one end of the drill needle is fixedly connected to the drill rod in a welding mode.
10. A method of machining a PCD drill bit as claimed in any one of claims 1 to 9, the method comprising: the method comprises the following processing steps:
s100, welding: welding a drill point blank and a drill handle blank which are made of PCD composite materials together through high-temperature heating of a welding material, so that a first-stage material is formed;
s200, step difference: processing the outer diameter and the cutting edge surface of the first-stage material, and detecting the outer diameter and the concentricity of the first-stage material by a high-precision detector until the first-stage material is processed to meet the required size, so as to form a second-stage material;
s300, opening a spiral chip groove: processing the second-stage material with the outer diameter and the cutting surface processed by laser to form a third-stage material;
s400, cutting an inclined cutting edge surface at the front end angle: sharpening the front end angle of the material in the third stage to process an inclined blade surface, thereby forming a material in the fourth stage;
s500, forming a central cutting face: and removing the convex part in the center of the front end angle to form a concave cutting edge surface, wherein the concave cutting edge surface is required to form a relief angle, and finally obtaining the finished PCD drill bit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311075489.4A CN116890399A (en) | 2023-08-24 | 2023-08-24 | PCD drill bit and processing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311075489.4A CN116890399A (en) | 2023-08-24 | 2023-08-24 | PCD drill bit and processing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116890399A true CN116890399A (en) | 2023-10-17 |
Family
ID=88312297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311075489.4A Pending CN116890399A (en) | 2023-08-24 | 2023-08-24 | PCD drill bit and processing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116890399A (en) |
-
2023
- 2023-08-24 CN CN202311075489.4A patent/CN116890399A/en active Pending
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