CN219683952U - Crown drill bit tool bit forming die - Google Patents
Crown drill bit tool bit forming die Download PDFInfo
- Publication number
- CN219683952U CN219683952U CN202320928381.4U CN202320928381U CN219683952U CN 219683952 U CN219683952 U CN 219683952U CN 202320928381 U CN202320928381 U CN 202320928381U CN 219683952 U CN219683952 U CN 219683952U
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- pressure head
- core block
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- block
- die
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- 238000000465 moulding Methods 0.000 claims abstract description 42
- 238000003825 pressing Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 5
- 238000005245 sintering Methods 0.000 abstract description 18
- 238000007731 hot pressing Methods 0.000 abstract description 7
- 239000000843 powder Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005192 partition Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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Abstract
The utility model discloses a crown drill bit forming die which comprises a die frame, a first pressure head and a second pressure head, wherein a cavity is formed in the die frame; the die further comprises a first core block and a second core block, one end of the first core block is arranged in the first pressure head, the other end of the first core block protrudes out of the first pressure head to form a first forming part, one end of the second core block is arranged in the second pressure head, the other end of the second core block protrudes out of the second pressure head to form a second molding part, the second molding part is connected with the first molding part, and a molding space for molding the cutter head is formed outside the second molding part and the first molding part. According to the utility model, the first core block and the second core block are arranged, and after hot-pressing sintering, the inner side wall of the cutter head is adhered to the first core block and the second core block, so that the die is convenient to disassemble.
Description
Technical Field
The utility model relates to the technical field of tool bits, in particular to a crown drill bit tool bit forming die.
Background
Hot press sintering is a sintering method in which a mold is filled with a dry powder and then heated while being pressurized from a uniaxial direction, so that molding and sintering are completed simultaneously.
Some crown drills are provided with tool bits, the tool bits such as crown tool bits are usually formed by hot-pressing sintering by adopting a weighting method, as shown in fig. 1, a traditional crown drill tool bit forming die generally comprises a die frame, a first pressing head 20, a core rod 30 and a second pressing head 40, a partition board 10 is arranged in the die frame, a cavity 101 is formed in the partition board 10, when the crown drill is used, the first pressing head 20 is firstly arranged in the cavity 101, then the core rod 30 is inserted into the first pressing head 20, the outer side of the core rod 30 is abutted against the inner side of the first pressing head 20, then powder is filled into the cavity 101, finally the second pressing head 40 is arranged in the cavity 101, and the whole is heated under pressure to finish hot-pressing sintering.
After the hot press sintering is completed, when the die is required to be removed, after the whole die is removed from the die frame, the second pressure head 40 and the first pressure head 20 are easy to separate from the tool bit 50 due to smaller bonding areas of the second pressure head 40 and the first pressure head 20 and the tool bit 50, and the inner side of the tool bit 50 is tightly bonded with the middle part of the outer side of the core rod 30, so that the bonding areas of the tool bit 50 and the core rod 30 are larger, the die is difficult to remove, and the core rod 30 is easy to damage during die removal. In view of the above, the present inventors have made intensive studies to solve the above-mentioned drawbacks of the prior art.
Disclosure of Invention
The present utility model aims to solve at least to some extent one of the technical problems in the above-described technology. Therefore, the utility model aims to provide a crown drill bit forming die, which is convenient for die disassembly by arranging a first core block and a second core block, and bonding the inner side wall of a bit with the first core block and the second core block after hot-pressing sintering.
In order to achieve the above purpose, the utility model provides a crown drill bit forming die, which comprises a die frame, a first pressure head and a second pressure head, wherein a cavity is formed in the die frame, the first pressure head is arranged at one end of the cavity, and the second pressure head is arranged at the other end of the cavity;
the die further comprises a first core block and a second core block, one end of the first core block is arranged in the first pressure head, the other end of the first core block protrudes out of the first pressure head to form a first forming part, one end of the second core block is arranged in the second pressure head, the other end of the second core block protrudes out of the second pressure head to form a second molding part, the second molding part is connected with the first molding part, and a molding space for molding the cutter head is formed outside the second molding part and the first molding part.
Further, the end of the first molding part forms a first abutting surface, and the second molding part forms a second abutting surface which is tightly matched with the first abutting surface.
Further, the first molding part end is concaved inward to form a connection groove, and the second molding part end is protruded to form a connection protrusion for being inserted into the connection groove.
Further, the inner groove wall of the connecting groove forms a first cambered surface, and the outer surface of the connecting lug forms a second cambered surface which is tightly matched with the first cambered surface.
Further, the connecting groove is in an inverted truncated cone shape.
Further, the first core block comprises a connecting block and a core sleeve, a first forming part is formed on the connecting block, and the core sleeve is detachably arranged on the connecting block.
Further, the end of the connecting block forms a third abutting surface, and the core sleeve is provided with a fourth abutting surface which is tightly matched with the third abutting surface.
Further, a third cambered surface is arranged on the connecting block, and a fourth cambered surface which is tightly matched with the third cambered surface is arranged on the core sleeve.
Further, the core sleeve end forms a first connection surface, and the second molding portion end forms a second connection surface that mates with the first connection surface.
Further, the second pressure head is provided with a mounting groove, and the movable pressing block is detachably arranged in the mounting groove.
After the structure is adopted, the forming die for the crown drill bit tool bit has the following beneficial effects:
firstly, when the die is used, the first pressure head is placed in the cavity, then the first core block is placed in the first pressure head, the first forming part protrudes out of the first pressure head, then the second forming part of the second core block is connected with the first forming part of the first core block, then quantitative powder is filled in the cavity, and then the second pressure head is placed in the cavity, so that one end of the second core block is positioned in the second pressure head, and finally hot-press sintering is carried out. After the sintering is completed to form the tool bit, the whole die frame is separated from the first pressure head and the second pressure head, at the moment, one part of the inner side wall of the tool bit is connected with the first forming part, the other part of the inner side wall of the tool bit is connected with the second forming part, the bonding area of the second forming part and the inner side wall of the tool bit is smaller, the second pressure head can be conveniently separated from the tool bit, and after the second pressure head is separated from the tool bit, the end part of the tool bit can be hit, so that the first pressure head is conveniently separated from the tool bit.
And secondly, after the hot-pressed sintering is finished, the inner side wall of the cutter head is adhered with the first core block and the second core block, so that when the die is disassembled, the first core block only needs to be replaced even if the first core block is damaged, and even if the second core block is damaged, the second core block only needs to be replaced, and the replacement cost is lower.
Compared with the prior art, the die is convenient to disassemble by arranging the first core block and the second core block and bonding the inner side wall of the cutter head with the first core block and the second core block after hot-pressing sintering.
Drawings
FIG. 1 is a schematic diagram of a conventional crown bit tool bit forming die;
fig. 2 is a schematic structural view of a crown bit tool bit forming die according to an embodiment of the utility model;
fig. 3 is a schematic structural view of a crown bit tool bit forming mold disengaging from a mold frame according to an embodiment of the utility model;
FIG. 4 is a schematic view of a molded tool tip according to an embodiment of the utility model;
FIG. 5 is an exploded view of a crown bit tool insert forming die according to an embodiment of the utility model;
FIG. 6 is a schematic diagram of the connection of a first core block to a second core block according to an embodiment of the present utility model;
FIG. 7 is a cross-sectional view of a shaped tool tip according to an embodiment of the utility model;
fig. 8 is a schematic diagram of connection of a connection block, a core sleeve, and a second core block according to an embodiment of the present utility model.
Description of the reference numerals
The die frame 1, the first ram 2, the second ram 3, the mounting groove 31, the movable press block 32, the first core block 4, the first molding portion 41, the first abutment surface 411, the connection groove 412, the first arc surface 4121, the connection block 42, the third abutment surface 421, the core sleeve 43, the fourth abutment surface 431, the first connection surface 432, the second core block 5, the second molding portion 51, the second abutment surface 511, the connection bump 512, the second arc surface 5121, the second connection surface 513, the molding space 6, and the bit 7.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
As shown in fig. 2 to 8, the forming die for the crown drill bit tool bit of the utility model comprises a die frame 1, a first pressure head 2 and a second pressure head 3, wherein a cavity is formed in the die frame 1, the first pressure head 2 is arranged at one end of the cavity, and the second pressure head 3 is arranged at the other end of the cavity; the cutter head comprises a cutter head body and is characterized by further comprising a first core block 4 and a second core block 5, wherein one end of the first core block 4 is arranged in the first pressure head 2, the other end of the first core block 4 protrudes out of the first pressure head 2 to form a first forming part 41, one end of the second core block 5 is arranged in the second pressure head 3, the other end of the second core block 5 protrudes out of the second pressure head 3 to form a second forming part 51, the second forming part 51 is connected with the first forming part 41, and a forming space 6 for forming the cutter head 7 is formed outside the second forming part 51 and the first forming part 41.
Thus, when the crown drill bit forming die is used, the first pressure head 2 is placed in the cavity, the first core block 4 is placed in the first pressure head 2, the first forming part 41 protrudes out of the first pressure head 2, the second forming part 51 of the second core block 5 is connected with the first forming part 41 of the first core block 4, quantitative powder is filled into the cavity, the second pressure head 3 is placed in the cavity, one end of the second core block 5 is positioned in the second pressure head 3, and finally hot-press sintering is carried out. After the sintering is completed to form the tool bit 7, the whole die frame 1 is separated from the tool bit 7 by the first pressure head 2 and the second pressure head 3, at the moment, one part of the inner side wall of the tool bit 7 is connected with the first forming part 41, the other part of the inner side wall of the tool bit 7 is connected with the second forming part 51, the bonding area between the second forming part 51 and the inner side wall of the tool bit 7 is smaller, the second pressure head 3 can be conveniently separated from the tool bit 7, and the end part of the tool bit 7 can be beaten after the second pressure head 3 is separated from the tool bit 7, so that the first pressure head 2 is conveniently separated from the tool bit 7.
After the hot-pressed sintering is finished, the inner side wall of the cutter head 7 is adhered with the first core block 4 and the second core block 5, and when the die is disassembled, the cutter head is only required to replace the first core block 4 even if the first core block 4 is damaged, only required to replace the second core block 5 even if the second core block 5 is damaged, and the replacement cost is lower.
Alternatively, the end of the first molding portion 41 forms a first abutment surface 411, and the second molding portion 51 forms a second abutment surface 511 that is tightly fitted to the first abutment surface 411. When the second core piece 5 is connected with the first core piece 4, the first abutting surface 411 of the first molding part 41 abuts against the second abutting surface 511 of the second molding part 51 tightly, so that the first molding part 41 is connected with the second molding part 51 tightly, and powder is prevented from entering the core piece effectively.
In some examples, the end of the first molding part 41 is concaved inward to form the connection groove 412, and the end of the second molding part 51 is convexly formed to form the connection protrusion 512 for being inserted into the connection groove 412. When the second core block 5 is connected with the first core block 4, the connection protrusion 512 may be inserted into the connection groove 412, thereby completing the connection. Specifically, the inner sidewall of the connection groove 412 forms a first arc surface 4121, and the outer surface of the connection protrusion 512 forms a second arc surface 5121 that is closely matched with the first arc surface 4121. During connection, the second cambered surface 5121 moves along the first cambered surface 4121, and the second cambered surface 5121 is attached to the first cambered surface 4121, so that the second core block 5 is quickly connected with the first core block 4. Wherein the connecting groove 412 has an inverted truncated cone shape.
Further, the first core block 4 includes a connection block 42 and a core sleeve 43, the connection block 42 is formed with a first molding portion 41, and the core sleeve 43 is detachably disposed on the connection block 42. In the use process, the core sleeve 43 is not contacted with the tool bit 7, when the die is removed, the core sleeve 43 can be quickly separated from the connecting block 42, after the core sleeve 43 is separated from the connecting block 42, the second core block 5 is separated from the tool bit 7, at the moment, the connecting block 42 can be placed on a bearing surface, such as the ground, and then the tool bit 7 is hit, so that the connecting block 42 is quickly separated from the tool bit 7, and the die removal is completed. After the connecting block 42 is used for a long time, even if the connecting block 42 is damaged when the die is removed, the connecting block 42 is only needed to be replaced, and the replacement cost is low.
In some examples, the end of the connection block 42 forms a third abutment surface 421 and the core sleeve 43 forms a fourth abutment surface 431 that mates with the third abutment surface 421. By arranging the third abutting surface 421 and the fourth abutting surface 431, connection between the connecting block 42 and the core sleeve 43 is facilitated, wherein a third cambered surface is arranged on the connecting block 42, and a fourth cambered surface tightly matched with the third cambered surface is arranged on the core sleeve 43. When the core sleeve 43 is separated from the connecting block 42, the fourth cambered surface moves along the third cambered surface, so that the core sleeve 43 is quickly separated from the connecting block 42.
Further, the end of the core sheath 43 forms a first connection surface 432, and the end of the second molding part 51 forms a second connection surface 513 closely fitted with the first connection surface 432. In this way, the core sleeve 43, the connecting block 42 and the second core block 5 are tightly matched with each other, so that the overall strength is high, and deformation is not easy to generate in the hot press molding process.
In some examples, the second ram 3 is provided with a mounting groove 31, and the mounting groove 31 is detachably provided with a movable pressing block 32. That is, the movable pressing block 32 can be detached from the mounting groove 31, so that the movable pressing block 32 with different heights can be conveniently connected with the mounting groove 31, and the tool bits 7 with different sizes can be formed by hot press sintering.
In this example, the tool bit 7 formed by hot-pressing sintering of the die is a crown tool bit, the crown tool bit is crown, and the crown tool bit can be connected with the substrate to form a crown drill bit, which is a common term of those skilled in the art.
Compared with the prior art, the die is convenient to disassemble by arranging the first core block 4 and the second core block 5 and bonding the inner side wall of the cutter head 7 with the first core block 4 and the second core block 5 after hot-pressing sintering.
The above examples and drawings are not intended to limit the form or form of the present utility model, and any suitable variations or modifications thereof by those skilled in the art should be construed as not departing from the scope of the present utility model.
Claims (10)
1. The crown bit tool bit forming die comprises a die frame, a first pressure head and a second pressure head, wherein a cavity is formed in the die frame, the first pressure head is arranged at one end of the cavity, and the second pressure head is arranged at the other end of the cavity; the method is characterized in that:
the die further comprises a first core block and a second core block, one end of the first core block is arranged in the first pressure head, the other end of the first core block protrudes out of the first pressure head to form a first forming part, one end of the second core block is arranged in the second pressure head, the other end of the second core block protrudes out of the second pressure head to form a second molding part, the second molding part is connected with the first molding part, and a molding space for molding the cutter head is formed outside the second molding part and the first molding part.
2. The crown drill bit forming die of claim 1, wherein: the end of the first forming part forms a first abutting surface, and the second forming part forms a second abutting surface which is tightly matched with the first abutting surface.
3. The crown drill bit forming die of claim 1, wherein: the end of the first forming part is concave inwards to form a connecting groove, and the end of the second forming part is convex to form a connecting lug for being inserted into the connecting groove.
4. A crown drill bit forming die as claimed in claim 3, wherein: the inner groove wall of the connecting groove forms a first cambered surface, and the outer surface of the connecting lug forms a second cambered surface which is tightly matched with the first cambered surface.
5. A crown drill bit forming die as claimed in claim 3, wherein: the connecting groove is in an inverted truncated cone shape.
6. The crown drill bit forming die of claim 1, wherein: the first core block comprises a connecting block and a core sleeve, a first forming part is formed on the connecting block, and the core sleeve is detachably arranged on the connecting block.
7. The crown drill bit forming die of claim 6, wherein: the end part of the connecting block forms a third abutting surface, and the core sleeve is provided with a fourth abutting surface which is tightly matched with the third abutting surface.
8. The crown drill bit forming die of claim 7, wherein: the connecting block is provided with a third cambered surface, and the core sleeve is provided with a fourth cambered surface which is tightly matched with the third cambered surface.
9. The crown drill bit forming die of claim 6, wherein: the core sleeve end forms a first connecting surface, and the second molding part end forms a second connecting surface tightly matched with the first connecting surface.
10. The crown drill bit forming die of claim 1, wherein: the second pressure head is provided with a mounting groove, and a movable pressing block is detachably arranged in the mounting groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320928381.4U CN219683952U (en) | 2023-04-23 | 2023-04-23 | Crown drill bit tool bit forming die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320928381.4U CN219683952U (en) | 2023-04-23 | 2023-04-23 | Crown drill bit tool bit forming die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219683952U true CN219683952U (en) | 2023-09-15 |
Family
ID=87961535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320928381.4U Active CN219683952U (en) | 2023-04-23 | 2023-04-23 | Crown drill bit tool bit forming die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219683952U (en) |
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2023
- 2023-04-23 CN CN202320928381.4U patent/CN219683952U/en active Active
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