CN1035131C - Method for taking out broken drill bit in oil holl of nodular cast iron crankshaft - Google Patents
Method for taking out broken drill bit in oil holl of nodular cast iron crankshaft Download PDFInfo
- Publication number
- CN1035131C CN1035131C CN92110429A CN92110429A CN1035131C CN 1035131 C CN1035131 C CN 1035131C CN 92110429 A CN92110429 A CN 92110429A CN 92110429 A CN92110429 A CN 92110429A CN 1035131 C CN1035131 C CN 1035131C
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- CN
- China
- Prior art keywords
- oilhole
- drill bit
- detonator
- breaking
- cast iron
- 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.)
- Expired - Fee Related
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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The present invention relates to a method for taking a broken drill bit from an oil hole of a nodular cast iron crankshaft, which comprises the steps: 2 to 10 grams of high explosive is added in an oil hole where a broken drill bit is arranged; then, a detonating tube is inserted into the oil hole, a detonator is connected with the detonating tube, and the detonator is ignited; the broken drill bit in the oil hole can be taken out easily after explosion for 1 to 3 times so that a lot of crankshafts to be discarded can be used again. The machining efficiency of the present invention is 20 times of that of electrospark machining, but the cost of the present invention is only 1/15 of electrospark machining. Therefore, the present invention has very large economic benefits, so the present invention can be widely used in industrial production.
Description
The present invention relates to a kind of method of from the ductile iron crankshaft oilhole, getting breaking of rod head.
In various engines, many is to adopt QT60-2, the bent axle that ductile cast iron materials such as QT70-2 are made.In the oilhole processing of bent axle, because the hole depth drill bit is thin, breaking of rod head phenomenon usually takes place, consequently cause whole bent axle to scrap and melt down.Both made and can adopt the molten method of spattering of electric spark that breaking of rod head is taken out, but its work efficiency is extremely low, processing charges is quite high.
The purpose of this invention is to provide a kind of explosion method, utilize the breaking of rod head in the explosive force taking-up ductile iron crankshaft oilhole.
The object of the present invention is achieved like this, and a kind of method of taking out broken drill bit in oil holl of nodular cast iron crankshaft is characterized in that: add 2-10 gram high explosive at oilhole breaking of rod head place.On described high explosive, insert detonator, the described detonator of oilhole oral area is fixed, it is not contacted with described oilhole inwall.An end that described detonator is exposed at described oilhole outside connects with detonator, ignites described detonator.
When adopting the forward explosion, described high explosive is placed the afterbody of described oilhole breaking of rod head.
When adopting reverse explosion, oppositely bore oilhole, described high explosive is placed the head of described oilhole breaking of rod head in the axial location of described oilhole breaking of rod head.
The present invention is owing to taked above method, can neither damage the ductile iron crankshaft matrix, can successfully take out oilhole breaking of rod head through the 1-3 separate explosion again, the bent axle that is on the verge of in a large number to scrap is come back to life, its working (machining) efficiency is 20 times of employing spark machined, its expense only is 1/15 of a spark machined, and its economic benefit is very remarkable.
Embodiments of the present invention is described in detail below in conjunction with accompanying drawing.
Accompanying drawing 1 is the inventive method forward exploded perspective view
Accompanying drawing 2 is the inventive method backlash schematic diagrames
As shown in Figure 1: the afterbody of oilhole breaking of rod head 1 in oilhole 4, place 2 gram hexogen explosives 2, insert detonator 3, and it is the detonator 3 of oilhole 4 oral areas is fixing with adhesive plaster 6, it is not contacted with oilhole 4 inwalls, so use detonator 3 is exposed at detonator 5 on the termination of oilhole 4 outsides, detonating primer 5 just can be finished once blast.Sometimes need just oilhole breaking of rod head 1 all to be taken out through twice or three blasts.
As shown in Figure 2: if breaking of rod head is long and dark, can utilize special-purpose clamping tool to guarantee centering,, high explosive 2 is placed on the head of oilhole breaking of rod head 1 oppositely boring oilhole 4 with the axial location of oilhole breaking of rod head 1.Insert detonator 3 then, and the detonator 3 of oilhole 4 oral areas is fixing, the detonator 3 that is exposed at oilhole 4 outsides is connected detonator 5, detonating primer 5 through 1-3 blast, just can oppositely eject oilhole breaking of rod head 1.
Can also adopt the high explosive of other kind in the foregoing description, consumption restrains at 2-10.Fixedly the fixture of oilhole oral area detonator also can adopt other form.
The inventive method all obtains good effect in the oilhole breaking of rod head taking-up experiment of hundreds of ball graphite cast-iron crankshaft, none damage of ductile iron crankshaft matrix can continue to use.The inventive method is compared with the electric discharge machining method of present use, and work efficiency improves a lot, and cost is but very low, and it can be widely used in the industrial production.
Claims (3)
1, a kind of method of taking out broken drill bit in oil holl of nodular cast iron crankshaft, it is characterized in that: go up adding 2-10 gram high explosive (2) at oilhole breaking of rod head (1), go up insertion detonator (3) at described high explosive (2), the described detonator (3) of oilhole (4) oral area is fixing, it is not contacted with described oilhole (4) inwall, an end that described detonator (3) is exposed at described oilhole (4) outside connects with detonator (5), ignites described detonator (5).
2, the method for taking out broken drill bit in oil holl of nodular cast iron crankshaft as claimed in claim 1 is characterized in that: the afterbody that described high explosive (2) is placed described oilhole breaking of rod head (1).
3, the method for taking out broken drill bit in oil holl of nodular cast iron crankshaft as claimed in claim 1 is characterized in that: at the reverse oilhole of axial location (4) of described oilhole breaking of rod head (1), described high explosive (2) is placed the head of described oilhole breaking of rod head (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92110429A CN1035131C (en) | 1992-09-18 | 1992-09-18 | Method for taking out broken drill bit in oil holl of nodular cast iron crankshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92110429A CN1035131C (en) | 1992-09-18 | 1992-09-18 | Method for taking out broken drill bit in oil holl of nodular cast iron crankshaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1084267A CN1084267A (en) | 1994-03-23 |
| CN1035131C true CN1035131C (en) | 1997-06-11 |
Family
ID=4944811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92110429A Expired - Fee Related CN1035131C (en) | 1992-09-18 | 1992-09-18 | Method for taking out broken drill bit in oil holl of nodular cast iron crankshaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1035131C (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051688A (en) * | 1989-11-11 | 1991-05-29 | 卡伯特公司 | Purification plant and purification method thereof |
| CN1055036A (en) * | 1990-12-28 | 1991-10-02 | 煤炭科学研究总院抚顺分院 | Deep hole control pressure relief blasting protrusion-dispelling technology, technology and equipment |
-
1992
- 1992-09-18 CN CN92110429A patent/CN1035131C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051688A (en) * | 1989-11-11 | 1991-05-29 | 卡伯特公司 | Purification plant and purification method thereof |
| CN1055036A (en) * | 1990-12-28 | 1991-10-02 | 煤炭科学研究总院抚顺分院 | Deep hole control pressure relief blasting protrusion-dispelling technology, technology and equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1084267A (en) | 1994-03-23 |
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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 |