CN1028502C - Method for manufacturing nodular cast iron cylindrical tooth drill bit - Google Patents
Method for manufacturing nodular cast iron cylindrical tooth drill bit Download PDFInfo
- Publication number
- CN1028502C CN1028502C CN 90102549 CN90102549A CN1028502C CN 1028502 C CN1028502 C CN 1028502C CN 90102549 CN90102549 CN 90102549 CN 90102549 A CN90102549 A CN 90102549A CN 1028502 C CN1028502 C CN 1028502C
- Authority
- CN
- China
- Prior art keywords
- core
- iron
- drill bit
- riser
- sandbox
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title abstract description 12
- 229910001141 Ductile iron Inorganic materials 0.000 title abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052742 iron Inorganic materials 0.000 claims abstract description 10
- 239000004576 sand Substances 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 7
- 244000035744 Hura crepitans Species 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910001018 Cast iron Inorganic materials 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 239000010439 graphite Substances 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- 238000004080 punching Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 4
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000005266 casting Methods 0.000 abstract description 5
- 238000004140 cleaning Methods 0.000 abstract 1
- 238000005553 drilling Methods 0.000 abstract 1
- 238000003754 machining Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 7
- 238000009423 ventilation Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention relates to a method for manufacturing an improved nodular cast iron cylindrical tooth drill bit. The key point of the invention is that a sand core which plays a role in supporting and positioning is added at the center of a casting cavity, and supporting iron is welded at the bottom end of the core iron, so that a main vent hole of a drill bit can be directly cast, and drilling by machining is not needed. The original riser ring is changed into a core fixing disc, an inner sprue on the core fixing disc is connected with an outer sprue of a riser box to form the easily cut riser, and the riser (namely the outer sprue) can be directly removed in the sand cleaning process without needing a sawing machine to cut. The manufacturing method simplifies the production process, shortens the production period, improves the quality and ensures that the qualified rate reaches 98 percent.
Description
The present invention is the improvement of cylindrical toothed drill of nodular graphite cast iron production technology.
Cylindrical toothed drill of nodular graphite cast iron is the boring main tool of mining, is consumable accessory.The technological process of adopting now is: system punching block and sandbox-moulding-casting-sand removal-saw cap mouth-heat treatment-brill main ventilation hole-brill divides wind hole-edge alloy column.This manufacture method, the drill bit of casting are solid, and this just brings a series of shortcomings.The solid bit cast, the waste molten iron; Drill bit cap mouth is big, is difficult for removing, and must saw the cap mouth with sawing machine; It is long that solid bit heat goes out to manage the burning time, wastes energy; The main ventilation hole also needs machined boring, waste manpower in man-hour.Employing is directly poured into a mould and machined brill main ventilation hole from top cap mouth, the percent defective height.A whole set of technology is unreasonable, product cost height, wasting manpower and material resources.See accompanying drawing 5.
The objective of the invention is to overcome the shortcoming that above-mentioned manufacture method exists, a kind of new technology of improved cylindrical toothed drill of nodular graphite cast iron is provided.
The object of the present invention is achieved like this.Its technological process: system punching block and sandbox-moulding-cast-sand removal-heat treatment-brill divides wind hole-edge alloy column, and key is to improve the moulding operation.Increase by one in the die cavity centre and work the core that supports positioning action, the core iron bottom in the core is fixed with support iron; Core has steam vent; Change former cap mouth circle 13 into fixed core disk, the steam vent on the fixed core disk is communicated with cap mouth sandbox pouring basin.Other operation does not change.
This process is compared with former process, has saved saw cap mouth and machined and has bored the main ventilation hole, adopts the easy-to-cut cap section hollow forming, and pouring basin directly is significantly smaller than former cap bore, just can directly the cap mouth be removed in the sand removal operation; Establish ingate on the fixed core disk, controlled poring rate and direction.A complete set of technology has shortened the production cycle 1/3, saves manpower 1/3, has improved operating efficiency, has simplified production technology, saves the energy, has reduced cost.Casting technique is reasonable, has improved casting quality, makes qualification rate reach 98%, has improved molten iron product yield 18%, and economic benefit is considerable.
Description of drawings:
Fig. 1 is formative technology figure of the present invention;
Fig. 2 is the core profile;
Fig. 3 is the fixed core disk front view;
Fig. 4 is the fixed core disk vertical view;
Fig. 5 is former formative technology figure;
Now in conjunction with the accompanying drawings method of the present invention is described further: a kind of cylindrical toothed drill of nodular graphite cast iron production method, operations such as its technological process: system punching block and sandbox-moulding-cast-sand removal-Re go out reason-brill and divide wind hole-edge alloy column, and system punching block and sandbox, casting, sand removal, heat go out to manage, the machined brill divides the wind hole are identical with original production process.Only change the moulding operation.Increase by one in the die cavity centre and work the core 2 that supports positioning action, the core upper end is flat with the fixed core disk 4 one that sand mold top studs with, and the lower end is suspended in the die cavity bottom.Iron 1 is supported in one of the core iron 3 bottom spot welding at core center, supports ferropexy in cavity bottom centre bore 12.Steam vent 9 is arranged in the core.The ingate 5 of fixed core disk centre bore 10 1 sides links to each other with core, and it is fan-shaped that ingate is, and ingate communicates with pouring basin 6 on the cap mouth sandbox 11, and fixed core disk centre bore opposite side is provided with steam vent 8, communicates with the steam vent 7 of cap mouth sandbox.In drill bit crown drill hole, in the hole, inlay alloy column.
Claims (1)
1, method for making cylindrical toothed drill of nodular graphite cast iron, technological process divides wind hole, edge alloy column for system punching block and sandbox, moulding, cast, sand removal, heat treatment, brill, it is characterized in that in the moulding operation, increase a core 2, the bottom fixed support iron 1 of core center core iron 3 in the die cavity centre; Core has steam vent 9; Steam vent 8 on the fixed core disk 4 is communicated with the steam vent 7 of cap mouth sandbox 11; Ingate 5 on the fixed core disk 4 is communicated with the pouring basin 6 of cap mouth sandbox 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90102549 CN1028502C (en) | 1990-04-30 | 1990-04-30 | Method for manufacturing nodular cast iron cylindrical tooth drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90102549 CN1028502C (en) | 1990-04-30 | 1990-04-30 | Method for manufacturing nodular cast iron cylindrical tooth drill bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1056270A CN1056270A (en) | 1991-11-20 |
| CN1028502C true CN1028502C (en) | 1995-05-24 |
Family
ID=4877578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90102549 Ceased CN1028502C (en) | 1990-04-30 | 1990-04-30 | Method for manufacturing nodular cast iron cylindrical tooth drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1028502C (en) |
-
1990
- 1990-04-30 CN CN 90102549 patent/CN1028502C/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CN1056270A (en) | 1991-11-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| C35 | Partial or whole invalidation of patent or utility model | ||
| IW01 | Full invalidation of patent right |
Decision date of declaring invalidation: 20010312 Decision number of declaring invalidation: 2944 |