EP2799663A2 - Verfahren zur Verlängerung der Lebensdauer eines Schrämmeissels - Google Patents
Verfahren zur Verlängerung der Lebensdauer eines Schrämmeissels Download PDFInfo
- Publication number
- EP2799663A2 EP2799663A2 EP13004425.8A EP13004425A EP2799663A2 EP 2799663 A2 EP2799663 A2 EP 2799663A2 EP 13004425 A EP13004425 A EP 13004425A EP 2799663 A2 EP2799663 A2 EP 2799663A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- strips
- shearer
- bit
- metallic substance
- rings
- 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.)
- Withdrawn
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
- E21C35/1833—Multiple inserts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
- E21C35/1837—Mining picks; Holders therefor with inserts or layers of wear-resisting material characterised by the shape
Definitions
- the subject of the invention is the method for increasing shearer bit durability by application of at least two strips and/or rings of composite metallic substance on conical surface of shearer bit.
- a known method for increasing shearer bit durability consists in applying a layer of homogeneous abrasion-resisting material on conical surface of the bit.
- Polish patent specification PL64658 "Shearer bit” presents a solution where bit body has a pad-welded working tip inside of which sinter is placed.
- Polish patent specification PL88563 "Coal shearer bit blade” presents a solution which consists in placing carbide on pad-welded tip of bit blade working tip.
- the essence of increasing shearer bit durability according to the invention is that two strips and/or rings of composite metallic substance are applied on conical surface of shearer bit.
- the second layer is applied similarly so that the axis of each strip and/or ring of the second layer was in the gap between the strips and/or rings of the first layer.
- the essence of the method is also that at least two strips of composite metallic substance are applied on conical surface of shearer bit preferably deflected by the angle from 0° to 60° from the plane passing through shearer bit symmetry axis and through the beginning or the end of the strip.
- strips and/or rings of composite metallic substance are applied with variable speed of at least one head for laser pad-welding preferably within the range from 0,10 m/min to 1,50 m/min.
- strips and/or rings of composite metallic substance may be applied with variable amount of the fed composite metallic substance preferably within the range from 5 g/min to 200 g/min.
- the strips and/or rings of composite metallic substance may be applied with variable chemical composition of the fed composite metallic substance preferably with variable content of tungsten carbide.
- strips and/or rings of composite metallic substance are applied with variable width of strips and/or rings preferably within the range from 0,3 mm to 5,0 mm, or also with variable thickness of strips and/or rings preferable within the range from 0,2 mm to 4,0 mm.
- conical surface of shearer bit between consecutive at least two strips and/or rings of composite metallic substance is subject to laser heat treatment before or after application of at least two strips and/or rings, there is also a possibility of their laser heat treatment before and after application of at least two strips and/or rings.
- conical surface of shearer bit between consecutive at least two strips and/or rings of composite metallic substance is subject to laser heat treatment preferably with at least one laser beam moving preferably with at least one head for laser pad-welding.
- alloy and/or mixture containing: iron and/or cobalt and/or nickel and/or chromium and/or molybdenum and/or manganese and/or carbon and/or silicon carbide and/or tungsten carbide and/or titanium carbide and/or aluminium oxide and/or diamond and/or tantalum carbide and/or regular boron nitride and/or fullerene and/or graphene and/or preferably nodular tungsten carbide are used for composite metallic substance.
- alloy and/or mixture containing preferably: nodular tungsten carbide with granulation from 20 ⁇ m to 500 ⁇ m preferably from 40 ⁇ m to 160 ⁇ m and the content from 10% to 80%, preferably from 60% to 70%, nickel from 5% to 30%, chromium from 5% to 30%, cobalt from 1% to 20%, iron from 1% to 20%, are used for composite metallic substance.
- composite metallic substance is applied on conical surface of shearer bit with strips preferably wide from at least 5,0 mm and preferably long at least 30% of the length of insert made of metal carbide or metals carbides sinter.
- the essence of the invention is also that composite metallic substance is applied on conical surface of shearer bit with at least two strips passing in the direction from bit blade to handle and with at least one strip that passes helically around the insert made of metal carbide or metals carbides sinter.
- the essence of the invention is also that composite metallic substance is applied on conical surface of shearer bit with at least two strips and at least one ring.
- composite metallic substance is applied on conical surface of shearer bit with at least one ring.
- a layer of steel of shearer bit wide preferably from 0,5 mm to 3,5 mm is removed from the edge of the socket used for fixing the insert made of metal carbide or metals carbides sinter, preserving bevelling of made edge.
- the essence of the invention is also that insert made of metal carbide or metals carbides sinter is mounted in shearer bit at the depth smaller than preferably from 0,5 mm to 5,0 mm in comparison with mounting on a typical shearer bit, another possible solution is that insert made of metal carbide or metals carbides sinter longer preferably from 0,5 mm to 5,0 mm in comparison with typical insert made of metal carbide or metals carbides sinter is mounted in shearer bit, another possibility is that the socket used for fixing the insert made of metal carbide or metals carbides sinter is made in such a way that its edges are lowered preferably from 0,5 mm to 5,0 mm in comparison with a typical socket.
- the essence of the invention is that composite metallic substance is applied on conical surface of shearer bit with least two layers, whereas preferably consecutive layers are created by application of at least one ring.
- the essence of the invention is also that composite metallic substance is applied on conical surface of shearer bit with least two layers, whereas favourably the first layer is created by application of at least one ring and/or strip, and the next layer or layers are created by means of application of at least two strips.
- An advantage of the method according to the invention is that it saves the amount of composite metallic substance applied on conical surface of shearer bit, moreover, deflection of strips of composite metallic substance from the plain passing through symmetry axis of shearer bit forces the turn of the bit in bit socket, which facilitates the process of uniform wear of shearer bit and its intrinsic sharpening.
- Another advantage may also be the fact that thermal application of another layer of composite metallic substance tempers previous layer and/or bit handle, which will improve their resistance to impacts.
- An example of execution is shearer bit whose conical surface was covered with 20 strips of composite metallic substance, 1,5 mm wide and ca. 1,0 mm thick and with the length of the strip ca. 30 mm, deviated to the left by the angle of 30° from the plane passing through symmetry axis of the bit and the beginning of the strip of composite metallic substance, at the same time time a gap of ca. 30% of strip width was left between the strips.
- the strips of composite metallic substance were applied, starting with the insert made of metal carbide or metals carbides.
- Fig. 1 presents shearer bit (3) on conical surface (2) of which strips (6) of composite metallic material (1) are applied
- fig. 2 presents another variant of the method according to the invention where strips (6) and strips (8) of composite metallic substance (1) are applied on conical surface (2)
- fig. 3 presents another variant of the invention where strips (6) of composite metallic substance (1) applied on conical surface (2) are deviated to the right by the angle of ca. 30° from the plane passing through symmetry axis (4) of shearer bit (3) and passing through the beginning of strip (6)
- fig. 4 presents shearer bit (3) on conical surface (2) of which a ring (7) and strips (6) of metallic composite substance (1) deviated by the angle of ca. 30° from the plane passing through symmetry axis (4) of shearer bit (3) and through the beginning of the strip (6), are applied.
- Fig. 5 presents the method in accordance with the invention, where a layer (10) of steel of shearer bit (3) is removed from the edge of the socket (9) used for fixing the insert made of metal carbide or metals carbides sinter (5), preserving bevelling (11) of made edge (12),
- fig. 6 presents another variant of the method, where the insert made of metal carbide or metals carbides sinter (5) is mounted in shearer bit (3) at the depth smaller than in comparison with mounting on a typical shearer bit
- fig. 7 presents another variant of the invention, where insert made of metal carbide or metals carbides sinter (13), longer in comparison with a typical insert made of metal carbide or metals carbides sinter (5), is placed in shearer bit (3).
- Fig. 8 presents the method according to the invention, where rings (7) of the first layer are applied on conical surface (2) of shearer bit (3), whereas a gap (14) of ca. 30% of ring (7) width is left between the rings and then rings (7) are applied on that layer in such a way that the axis of the rings (7) is placed in the gap (14) between rings (7) of the first layer.
- Fig. 9 presents the method in accordance with the invention, where rings (7) are applied on conical surface (2) of shearer bit (3), whereas a gap (14) of ca. 30% of ring (7) width is left between the rings, and then strips (6) are applied on that layer, which are deviated to the right by the angle of ca. 30° from the plane passing through symmetry axis (4) of shearer bit (3) and through the beginning of the strip (6).
- Fig. 10 presents the method in accordance with the invention, where a ring (7) is applied helically on conical surface (2) of shearer bit (3), and then strips (6) deviated to the right by the angle of ca. 30° from the plane passing through symmetry axis (4) of shearer bit (3) and through the beginning of the strip (6) are applied on that layer.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Harvester Elements (AREA)
- Earth Drilling (AREA)
- Powder Metallurgy (AREA)
- Coating By Spraying Or Casting (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL403719A PL224779B1 (pl) | 2013-04-29 | 2013-04-29 | Sposób zwiększenia trwałości noża kombajnowego |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL40371913 Previously-Filed-Application | 2013-04-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2799663A2 true EP2799663A2 (de) | 2014-11-05 |
Family
ID=49578061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13004425.8A Withdrawn EP2799663A2 (de) | 2013-04-29 | 2013-09-11 | Verfahren zur Verlängerung der Lebensdauer eines Schrämmeissels |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2799663A2 (de) |
| PL (1) | PL224779B1 (de) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL88563B1 (de) | 1974-01-21 | 1976-09-30 | ||
| PL64658Y1 (pl) | 2008-03-31 | 2009-11-30 | Lstrok Uczak Stanis & Lstrok A | Polowy transporter warzyw |
-
2013
- 2013-04-29 PL PL403719A patent/PL224779B1/pl unknown
- 2013-09-11 EP EP13004425.8A patent/EP2799663A2/de not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL88563B1 (de) | 1974-01-21 | 1976-09-30 | ||
| PL64658Y1 (pl) | 2008-03-31 | 2009-11-30 | Lstrok Uczak Stanis & Lstrok A | Polowy transporter warzyw |
Also Published As
| Publication number | Publication date |
|---|---|
| PL224779B1 (pl) | 2017-01-31 |
| PL403719A1 (pl) | 2014-11-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Dewangan et al. | Wear assessment of conical pick used in coal cutting operation | |
| US7445294B2 (en) | Attack tool | |
| JP5972470B2 (ja) | 超硬質の平坦な打撃面を有するピックツール | |
| US20080036273A1 (en) | Washer for a Degradation Assembly | |
| US9458607B2 (en) | Rotatable cutting tool with head portion having elongated projections | |
| KR20150053365A (ko) | 석재 절삭용 팁 및 그 제조방법 | |
| WO2017032704A1 (en) | Asymmetric pick tool with an aspect ratio between leading and trailing edges | |
| US20080048484A1 (en) | Shank for an Attack Tool | |
| Krauze et al. | Influence of the hard-faced layer welded on tangential-rotary pick operational part on to its wear rate | |
| EP3292274B1 (de) | Schneidwerkzeug | |
| EP2799663A2 (de) | Verfahren zur Verlängerung der Lebensdauer eines Schrämmeissels | |
| JP5994654B2 (ja) | 超高硬度焼結体付きドリルおよびその製造方法 | |
| CN103437713B (zh) | 一种自锐式环齿孕镶金刚石钻头 | |
| DE112012000963T5 (de) | Einsatz und Abtraganordnung | |
| RU174406U1 (ru) | Почвообрабатывающий сферический диск | |
| RU2510674C2 (ru) | Способ изготовления напильников | |
| CN207267420U (zh) | 一种钎焊金刚石石材雕刻刀 | |
| KR20220024025A (ko) | 절삭입자를 갖는 비대칭 톱니를 구비한 절삭공구 | |
| CN204397066U (zh) | 一种耐热耐磨合金锯片 | |
| CN103640094A (zh) | 金刚石排锯刀头及其制作方法 | |
| JP7550767B2 (ja) | 内部勾配材料、道具、および方法 | |
| Dvornikov et al. | Main development trends and some technical decisions on mining tools equipped with super-hard composite materials inserts | |
| US20250091322A1 (en) | Internal Gradient Materials, Assemblies and Methods | |
| CN211162113U (zh) | 加工汽车曲轴的锯片铣刀 | |
| JP6148101B2 (ja) | 切削工具 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20130911 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| AX | Request for extension of the european patent |
Extension state: BA ME |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20180404 |