CN213559886U - Graphite core rod for sintering tubular hard alloy - Google Patents
Graphite core rod for sintering tubular hard alloy Download PDFInfo
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- CN213559886U CN213559886U CN202022615918.0U CN202022615918U CN213559886U CN 213559886 U CN213559886 U CN 213559886U CN 202022615918 U CN202022615918 U CN 202022615918U CN 213559886 U CN213559886 U CN 213559886U
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Abstract
The utility model belongs to the technical field of the carbide sintering, especially, tubulose carbide is graphite core bar for sintering, including first semicircle graphite core bar and second semicircle graphite core bar, constitute a complete graphite core bar after first semicircle graphite core bar and the closed second semicircle graphite core bar, the inside center of graphite core bar is formed with the centre bore, screw thread has all been seted up to graphite core bar surface left end and right-hand member, screw thread threaded connection has the internal thread, the internal thread is seted up in the inside of fixed end cover, the bell mouth has been seted up at graphite core bar right-hand member middle part, the bell mouth cooperatees and has the expansion piece, and this tubulose carbide sintering graphite core bar has the structure ingenious, and existing repeatedly usable can guarantee workpiece quality again, can increase substantially the product size qualification rate characteristics.
Description
Technical Field
The utility model relates to a carbide sintering technical field especially relates to a graphite core bar is used in tubular carbide sintering.
Background
Cemented carbide is an alloy material made from a hard compound of refractory metals and a binder metal by a powder metallurgy process. The hard alloy has a series of excellent performances of high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance and the like, particularly high hardness and wear resistance, basically keeps unchanged even at the temperature of 500 ℃, and still has high hardness at the temperature of 1000 ℃.
The thin-wall tube type hard alloy shrinks in the sintering process, generally, the shrinkage of small hard alloy products is in the range of required size, but the problems of inner hole ellipse, workpiece bending and the like can occur in the liquid phase sintering process of the tubular hard alloy under the influence of the height and the self weight of the workpiece, particularly the problems of high bonding ratio products, ellipse, bending and the like are obvious, the size is difficult to control, and the product percent of pass is low.
In order to solve the problems, the application provides a graphite core rod for sintering tubular hard alloy.
Disclosure of Invention
Objects of the invention
For solving the technical problem that exists among the background art, the utility model provides a graphite core bar is used in tubular carbide sintering has the structure ingenious, and both repeatedly usable can guarantee the work piece quality again, can increase substantially the product size qualification rate characteristics.
(II) technical scheme
In order to solve the problem, the utility model provides a tubulose carbide is graphite core bar for sintering, including first semicircle graphite core bar and second semicircle graphite core bar, constitute a complete graphite core bar after first semicircle graphite core bar and the closed second semicircle graphite core bar, the inside center of graphite core bar is formed with the centre bore, screw thread has all been seted up to graphite core bar surface left end and right-hand member, screw thread threaded connection has the internal thread, the internal thread is seted up in the inside of fixed end cover, the bell mouth has been seted up at graphite core bar right-hand member middle part, the bell mouth cooperatees and has the extension piece.
Preferably, the taper of the tapered hole is set from zero five degrees to one point five degrees.
Preferably, the number of the fixed end caps is two, and the number of the expansion pieces is one.
The above technical scheme of the utility model has following profitable technological effect:
this tubulose carbide graphite core bar for sintering, through setting up the graphite core bar, the centre bore, bell mouth and extension piece and fixed end cover, the graphite core bar that first semicircle graphite core bar and second semicircle graphite core bar formed after closed, the fixed end cover is fixed graphite core bar both ends, in the extension piece screw in bell mouth, make graphite core bar right-hand member reach the external diameter size that expands needs, then insert the graphite core bar in the tubulose carbide work piece, keep the tubulose carbide work piece can not appear nonconforming product at the in-process of sintering, thereby reach the structure ingenious, not only repeatedly usable, can guarantee the work piece quality again, can increase substantially the product size qualification rate effect.
Drawings
Fig. 1 is a schematic view of a matching structure of a first semicircular graphite core rod, a second semicircular graphite core rod and a fixed end cover of the present invention;
FIG. 2 is a schematic view of a closed structure of a first semicircular graphite core rod and a second semicircular graphite core rod of the present invention;
fig. 3 is the utility model discloses a closed back right-hand member of first semicircle graphite core bar and second semicircle graphite core bar and extension piece cooperation structure schematic diagram.
In the figure: 1. a first semicircular graphite core rod; 2. a central bore; 3. a second semicircular graphite core rod; 4. threading; 5. fixing an end cover; 6. an internal thread; 7. a tapered hole; 8. an expansion member; 9. a graphite core rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1-3, the utility model provides a graphite core bar is used in tubular carbide sintering, including first semicircle graphite core bar 1 and second semicircle graphite core bar 3, constitute a complete graphite core bar 9 after first semicircle graphite core bar 1 and the closed of second semicircle graphite core bar 3, graphite core bar 9 inside center is formed with centre bore 2, screw thread 4 has all been seted up to graphite core bar 9 surface left end and right-hand member, screw thread 4 threaded connection has internal thread 6, internal thread 6 sets up in the inside of fixed end cover 5, bell mouth 7 has been seted up at graphite core bar 9 right-hand member middle part, bell mouth 7 cooperatees has expansion piece 8.
In this embodiment, it should be noted that the taper of the tapered hole 7 is set to be zero five degrees to one five degrees, and by adopting such a setting mode, after the expansion piece 8 is screwed into the tapered hole 7, the outer diameter of the right end of the graphite core rod 9 can be better adjusted.
In this embodiment, it should be noted that two fixing end caps 5 are provided, and one expansion piece 8 is provided, and in this way, the two fixing end caps 5 fix two ends of the graphite core rod 9 through the matching of the screw thread 4 and the internal thread 6.
The working principle is as follows: when in use, the first semicircular graphite core rod 1 and the second semicircular graphite core rod 3 are closed to form a complete graphite core rod 9, the closed left ends of the first semicircular graphite core rod 1 and the second semicircular graphite core rod 3 are fixed together by the fixed end cover 5 through the matching of the screw thread 4 and the internal thread 6, the expansion piece 8 is screwed into the tapered hole 7 at the right end of the graphite core rod 9, the right end of the graphite core rod 9 is radially expanded to the required outer diameter size, then the fixed end cover 5 is screwed into the right end of the graphite core rod 9 through the matching of the internal thread 6 and the screw thread 4 to be fixed, the graphite core rod 9 is put into a tubular hard alloy workpiece, the hard alloy workpiece shrinks in the sintering process and is matched with the graphite core rod, so as to ensure the size and the roundness of the inner hole of a product, after the hard alloy workpiece is sintered, the fixed end cover 5 at the right end of the graphite core rod 9 is unscrewed, the, the right end of the graphite core rod 9 is shrunk, and then the graphite core rod 9 piece is pushed out from the right end to the left end until the graphite core rod 9 is pushed out of the hard alloy workpiece, so that the using process is completed.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. The utility model provides a graphite core bar is used in tubular carbide sintering, includes first semicircle graphite core bar (1) and second semicircle graphite core bar (3), constitute a complete graphite core bar (9) after first semicircle graphite core bar (1) and second semicircle graphite core bar (3) are closed, its characterized in that, graphite core bar (9) inside center is formed with centre bore (2), screw thread (4) have all been seted up to graphite core bar (9) surface left end and right-hand member, screw thread (4) threaded connection has internal thread (6), internal thread (6) are seted up in the inside of fixed end cover (5), bell mouth (7) have been seted up in graphite core bar (9) right-hand member middle part, bell mouth (7) cooperate and have expansion piece (8).
2. The graphite core rod for tubular cemented carbide sintering according to claim 1, characterized in that the taper of the tapered hole (7) is set from zero to one and a half degrees.
3. The graphite core rod for tubular cemented carbide sintering of claim 1, characterized in that the number of the fixed end caps (5) is provided with two and the number of the expansion pieces (8) is provided with one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022615918.0U CN213559886U (en) | 2020-11-13 | 2020-11-13 | Graphite core rod for sintering tubular hard alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022615918.0U CN213559886U (en) | 2020-11-13 | 2020-11-13 | Graphite core rod for sintering tubular hard alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213559886U true CN213559886U (en) | 2021-06-29 |
Family
ID=76537003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022615918.0U Active CN213559886U (en) | 2020-11-13 | 2020-11-13 | Graphite core rod for sintering tubular hard alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213559886U (en) |
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2020
- 2020-11-13 CN CN202022615918.0U patent/CN213559886U/en active Active
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