CN203145943U - Micro-metallurgical reinforced sparkless cutting tooth - Google Patents
Micro-metallurgical reinforced sparkless cutting tooth Download PDFInfo
- Publication number
- CN203145943U CN203145943U CN 201320117340 CN201320117340U CN203145943U CN 203145943 U CN203145943 U CN 203145943U CN 201320117340 CN201320117340 CN 201320117340 CN 201320117340 U CN201320117340 U CN 201320117340U CN 203145943 U CN203145943 U CN 203145943U
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- China
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- cutting tooth
- pick
- metallurgical
- carbide bit
- tooth body
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Abstract
The utility model discloses a micro-metallurgical reinforced sparkless cutting tooth which comprises a cutting tooth body and a carbide bit mounted on the cutting tooth body, wherein the carbide bit is connected with the cutting tooth body through screw threads; and a combining part of the carbide bit and the cutting tooth body is fixed in a soldering manner. After the reinforced cutting tooth body and the carbide bit are connected through the screw threads and fixed in the soldering manner, the failure problem of the carbide bit due to the unfirm effect caused by the traditional direct-soldering manner is solved. In addition, by utilizing a micro-metallurgical-cladding corrosion resisting layer, the service life of the cutting tooth body is prolonged; and sparks are not generated when the cutting tooth is used for cutting coal and rock, so that the coal-mining safety is improved.
Description
Technical field
The utility model belongs to the Machining Technology field, particularly a kind of little metallurgical no-spark pick of strengthening.
Background technology
Pick is to be used for directly cutting the cutter of coal petrography on coal mining machine and the development machine, is the vital part of colliery digger, directly affects the production efficiency in colliery the application life of pick.The inefficacy of pick 80% mainly since wearing and tearing and cutter head come off and cause.
Pick is subjected to complicated work condition environment such as high pressure stress, shear stress and shock loading in the process of cut coal petrography, and the wearing and tearing heat of pick can be so that the pick temperature be brought up to 600 ~ 800 degree in the course of the work, cause that denticle produces high tempering, reduce the hardness of pick, make denticle accelerated wear test.Because the affixed mode of soldering is directly adopted in carbide alloy and tooth head junction, when in cutting coal petrography process, being subjected to powerful shock loading, causing stress to concentrate and cause hard alloy head to get loose.
Method strengthened picks such as the present normal built-up welding reinforcement of adopting, plasma melting coating rubbing-layer, but because there are shortcomings such as the heat affected zone is big, defective is wayward in these methods, and wearing layer easy spark that produces when the cutting coal petrography, influencing the safety in production in colliery, actual strengthening effect is undesirable.
Summary of the invention
In view of above-mentioned present situation, the purpose of this utility model is the problem that comes off that solves carbide bit in the pick, and a kind of little metallurgical no-spark pick of strengthening is provided.
Technical solution of the present utility model is: a kind of little metallurgical no-spark pick of strengthening comprises the pick denticle, and goes up the carbide bit of installing; By being threaded, and fix by soldering at two body binding sites between wherein said carbide bit and the pick denticle.
In this was novel, the tapering section that also is included in described pick denticle was provided with wearing layer.Can improve hardness and abrasion resistance, increase the service life.
Further, described wearing layer thickness is 0.5-2.5mm.
The beneficial effects of the utility model:
Traditional pick is that carbide bit is embedded in the pick denticle, fixes by soldering again, and in follow-up cladding strengthening process, brazing layer comes off because of the rising of organism temperature easily; In actual the use, soldering also often takes place snap, hard alloy head comes off, and causes pick initial failure.The utility model is by improving structure, and carbide bit is fixed on the pick body by being threaded, and then carries out soldering and fix, and has avoided the problems referred to above fully, has realized the sync fail of pick body of tool bit and hard alloy head.In cut coal petrography process, little metallurgical cladding wearing layer does not produce spark, has improved the safety of coal mining.Compare with traditional pick, improve the application life of back pick and can improve more than 3 times, especially be fit to high fiery colliery and use.
Description of drawings
Fig. 1 is this novel schematic diagram.
The specific embodiment
Embodiment 1
See a kind of little metallurgical no-spark pick of strengthening that Fig. 1 is, comprise carbide bit 1, wearing layer 2 and pick denticle 3.Pick denticle 3 taperings of present embodiment have groove, be provided with screw thread in this groove, and the carbide bit 1 of assembling is partly with external screw thread with it, after fastening by being threaded to each other, the binding site that carbide bit 1 is connected with pick denticle 3 taperings makes its carbide bit 1 and pick denticle 3 form an integral body by the fixing weld layer (meaning not shown in the figures) that forms of soldering again.Do not produce spark in order to solve surface, pick denticle 3 tapering, improved safety and the intensity of coal mining, and surperficial by little metallurgical cladding alloy powder in described pick denticle 3 taperings, form the wearing layer 2 that is metallurgical binding with it in pick denticle 3 taperings.The thickness of the little metallurgical cladding wearing layer 2 of present embodiment is 1.2mm.Little metallurgical cladding realizes that by high power semiconductor lasers the high power semiconductor lasers technological parameter is:
Laser power P=2300W;
Scan velocity V=520mm/min;
Rectangular light spot is 2 * 8mm;
Overlapping rate is 30%.
Each composition quality percentage: C 0.8% of alloy powder, Cr 18%, and B 0.8%, and Si 2.5%, and Mo 0.45%, and Ni 2.3%, and Mn 0.35%, and Ti 0.125%, and Nb 0.75% surplus is Fe.
Manufacturing process:
Selecting material for use is the pick denticle 3 of 42CrMo, process screw thread at pick denticle 3 tapering grooves by machining, screwed carbide bit 1 is screwed in the pick denticle 3 tapering grooves, with pick denticle 3 surface degreasings, rust cleaning, the pick denticle 3 after handling is installed on the rotary table.Adopt the method for gravity transfer alloyed powder, at pick denticle 3 tapering section surfaces, alloy layer thickness is 1.2mm with the alloy powder cladding.In order to reduce the residual stress of cladding area, prevent the generation of cold crack, carry out the slow cooling processing to strengthening back pick denticle 3 integral body.
Embodiment 2
It is identical with the mechanism of embodiment 1, and the Therefore, omited is described.Difference is that to form the thickness that is the wearing layer 2 of metallurgical binding with it in pick denticle 3 taperings be 1.0mm.The high power semiconductor lasers technological parameter is:
Laser power P=2100W;
Scan velocity V=420mm/min;
Rectangular light spot is 2 * 8mm;
Overlapping rate is 20%.
Each composition quality percentage: C 0.8% of alloy powder, Cr 18%, and B 0.8%, and Si 2.5%, and Mo 0.45%, and Ni 2.3%, and Mn 0.35%, and Ti 0.125%, and Nb 0.75% surplus is Fe.
Manufacturing process is identical with embodiment 1.
Embodiment 3
It and embodiment 1,2 identical.Difference is that to form the thickness that is the wearing layer 2 of metallurgical binding with it in pick denticle 3 taperings be 0.8mm.The high power semiconductor lasers technological parameter is:
Laser power P=2000W;
Scan velocity V=410mm/min;
Rectangular light spot is 2 * 8mm;
Overlapping rate is 30%.
Each composition quality percentage: C 0.8% of alloy powder, Cr 18%, and B 0.8%, and Si 2.5%, and Mo 0.45%, and Ni 2.3%, and Mn 0.35%, and Ti 0.125%, and Nb 0.75% surplus is Fe.
Manufacturing process and embodiment 1,2 identical.
Claims (3)
1. little metallurgical no-spark pick of strengthening comprises the pick denticle, and goes up the carbide bit of installing; It is characterized in that, by being threaded, and fix by soldering at two body binding sites between described carbide bit (1) and the pick denticle (3).
2. little metallurgical no-spark pick of strengthening according to claim 1 is characterized in that section is provided with wearing layer (2) in described pick denticle (3) tapering.
3. little metallurgical no-spark pick of strengthening according to claim 2 is characterized in that wherein wearing layer (2) thickness is 0.5-2.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320117340 CN203145943U (en) | 2013-03-15 | 2013-03-15 | Micro-metallurgical reinforced sparkless cutting tooth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320117340 CN203145943U (en) | 2013-03-15 | 2013-03-15 | Micro-metallurgical reinforced sparkless cutting tooth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203145943U true CN203145943U (en) | 2013-08-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320117340 Expired - Fee Related CN203145943U (en) | 2013-03-15 | 2013-03-15 | Micro-metallurgical reinforced sparkless cutting tooth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203145943U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953091A (en) * | 2014-05-21 | 2014-07-30 | 上海智平基础工程有限公司 | TRD (Trench-Cutting and Re-mixing Deep Wall) construction method cutting tool for construction of gravel formation and rock formation |
| CN107630663A (en) * | 2017-08-11 | 2018-01-26 | 江苏中科大港激光科技有限公司 | A kind of rotary digging tooth for having wearability and toughness concurrently and preparation method thereof |
-
2013
- 2013-03-15 CN CN 201320117340 patent/CN203145943U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953091A (en) * | 2014-05-21 | 2014-07-30 | 上海智平基础工程有限公司 | TRD (Trench-Cutting and Re-mixing Deep Wall) construction method cutting tool for construction of gravel formation and rock formation |
| CN107630663A (en) * | 2017-08-11 | 2018-01-26 | 江苏中科大港激光科技有限公司 | A kind of rotary digging tooth for having wearability and toughness concurrently and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130821 Termination date: 20190315 |