GB2081176A - Coated Cutting Blade - Google Patents
Coated Cutting Blade Download PDFInfo
- Publication number
- GB2081176A GB2081176A GB8109422A GB8109422A GB2081176A GB 2081176 A GB2081176 A GB 2081176A GB 8109422 A GB8109422 A GB 8109422A GB 8109422 A GB8109422 A GB 8109422A GB 2081176 A GB2081176 A GB 2081176A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blade
- nickel
- tool
- coating
- coated
- 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- Withdrawn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
- 238000005520 cutting process Methods 0.000 title claims abstract description 28
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 68
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 34
- 239000011248 coating agent Substances 0.000 claims abstract description 29
- 238000000576 coating method Methods 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 15
- 238000001311 chemical methods and process Methods 0.000 claims abstract description 4
- 230000036346 tooth eruption Effects 0.000 claims abstract 2
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000002411 adverse Effects 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229910000997 High-speed steel Inorganic materials 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- JUWOETZNAMLKMG-UHFFFAOYSA-N [P].[Ni].[Cu] Chemical compound [P].[Ni].[Cu] JUWOETZNAMLKMG-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- QDWJUBJKEHXSMT-UHFFFAOYSA-N boranylidynenickel Chemical compound [Ni]#B QDWJUBJKEHXSMT-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- OFNHPGDEEMZPFG-UHFFFAOYSA-N phosphanylidynenickel Chemical compound [P].[Ni] OFNHPGDEEMZPFG-UHFFFAOYSA-N 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Knives (AREA)
Abstract
At least that portion or each such portion of a saw blade or a similar sawing or cutting tool which in use engages or contacts material being cut by the blade or tool is coated with a nickel or nickel based deposit by an electroless chemical process. Thus in the case of a saw blade such as a hacksaw blade the entire blade or at least the working portion is coated in the above manner, i.e. on the blade side faces and cutting teeth. The lubricity of the coating facilitates operation of the saw or cutting tool and also provides a hard corrosion resistant protection of the blade. The coating has good adhesion direct to the blade or tool without adversely affecting the required dimensions of the latter.
Description
SPECIFICATION
Saw Blades and Similar Cutting Tools
The object of this invention is to provide improved saw blades or similar cutting tools -ffording ease of use and other practical advantages which will be apparent from the following disclosure.
The invention is applicable to saw blades for a wide variety of use, e.g. in crosscut saws, tenon saws, keyhole saws, hacksaws (including bimetal hacksaws), reciprocating blade saws, jig saws, band saws, circular saws and also to the cutting elements or teeth and other parts of chain saws.
The invention is also applicable to other cutting tools of a generally similar nature such as rotary slotting cutters, milling cutters and arbor mills as well as to reciprocating cutting tools.
According to this invention a saw blade or a similar sawing or cutting tool or a part or parts thereof is characterised by at least that portion or each such portion of the saw blade or tool which in use engages or contacts material being cut thereby, being coated with a nickel or nickel based deposit by an electroless chemical process.
In practice and as applied for example to a hacksaw blade, the blade is cleaned and degreased by appropriate pretreatment of the blade and then by a suitable electroless or autocatalytic nickel process the entire blade is coated with nickel, e.g. in a nickel boron, nickel phosphorus or nickel copper phosphorus solution to a suitable thickness without adversely affecting required dimensions of the blade especially as an intervening layer of a bonding agent is not necessary.
For direct bonding of the nickel or nickel based deposit to the surfaces of the blade with maximum adhesion the blade should be very thoroughly cleaned to remove all traces of rolling mill and heat treatment scale and discoloration and also grease. A suitable cleaning procedure is to firstly immerse the blade in a heated caustic solution and then in a hydrochloric acid solution.
While immersed in the hydrochloric acid solution or in a second such solution the blade is ultrasonically vibrated to dislodge very fine particles of carbon smut, scale and dirt drawn by the etching acid from the blade. The blade may be then dipped in sulphuric acid solution and rinsed after which it is immediately transferred to the electroless nickel coating bath before oxidation of the highly cleaned and etched surfaces of the blade can occur.
The method and sequence of the cleaning operation may vary according to requirements, e.g. according to the material specification and manufacturing process used in production of the blades. If desired direct electric anode cleaning may be employed.
As will be appreciated and particularly in the case of hacksaw blades, a considerable quantity of them can be compactly jig mounted or suspended in closely spaced apart relationship for cleaning immersion and subsequent nickel coating. Barrel cleaning and coating is also possible so long as total immersion of the blades is maintained.
As is known in the art of electroless nickel coating, a uniform deposit is obtained on the surface or surfaces of a body or component being coated even in holes or recesses and such coating is not subject to the kind of variation and rounding of edges which occurs in electro-plating due to varying current density and/or shielding between anode and cathode. Thus nickel coating to a required uniform thickness can be readily obtained without any rounding of cutting edges in a controlled manner with negligible effect on the dimensions of the blade which can thus be maintained within close tolerances.
The advantages obtained by coating a saw blade in the above manner is that owing to its amorphous nature, the nickel coating is smooth and due to its resulting very low co-efficient of friction provides a high degree of lubricity, i.e. for ease of movement of the saw blade between material when cutting the latter thus requiring less effort or power and minimising the likelihood of pick up and scuffing on the blade sides or jamming of the saw in the material with consequent less likelihood of blade breakage. The ease of operation obtained in this way is considerably greater than that obtained when using, for example, a painted or scaled hacksaw blade.The advantage thus obtained also compares with that of a "Teflon" (Trade Mark) coated wood saw i.e. coated with polytetrafluoroethylene (PTFE) but with the added benefit that the nickel coated blade is capable of similarly cutting metal or other hard material.
The coating has good adhesion direct to the steel or other base material of the blade, i.e.
without any substrate. Under test the adhesion may be such as to withstand 65,000 p.s.i. (4,500 kg/cm2) parting load in the case of high carbon or high speed steel (HSS) of the blade. Thus the coating is unlikely to peel or similarly part from the blade which peeling might otherwise crease sharp edges likely to cause injury and/or damage during use in cutting metal or other hard material.
Further in this regard, the coating is readily flexible with the blade and thus is not adversely affected by bending or twisting of the blade. The coating obtained is superior in all respects to electro-deposited chromium plating which latter provides a porous nodular surface rather than a highly smooth protective and corrosion resistant surface.
In addition to the foregoing advantages the coating provides a hard wearing protective skin to the blade and in particular to the cutting edges of the teeth and also to the chip spaces between the teeth, the hardness being of the order of 500 to 700 V.P.N. but which can be further increased by heat treatment as necessary. However, heat generated by the cutting action during use of the blade has the effect of hardening the coating, especially on the cutting edges.
Chip spaces treated with the nickel coating
greatly assist the flow and evacuation of cuttings
and swarf and reduces the tendency of the latter
to erode the chip space faces.
The coating is also highly corrosion resistant so
that protection of the blades by grease coating,
paint, lacquering or other rust proofing is
unnecessary, whilst little or no galvanic action or
oxidation with dissimilar metals occurs, e.g.
where the blade is secured or clamped by screws
or wedges of other metal to a holder, frame or
tool body.
The nickel or nickel based coating also enables the blades to be easily maintained in a hygienic condition for use in food preparation such as in
butchers' bone cutting saws and also in the case of blades used in saws for surgical purposes.
Particularly in the latter case it is possible to provide a somewhat less expensive alternative to solid stainless steel saw blades by the nickel or nickel based coating or carbon steel or similar non-stainless steel blades.
A still further advantage of the coating is its bright finish which imparts an attractive appearance to the blades for sales appeal purposes.
In the application of the invention to chain saws the cutting elements or teeth and their side faces and preferably also the chain links and pins, are provided with the nickel or nickel based coating.
In the case of other toothed cutting tools such as circular saws or slotting cutters, having cutting elements or inserts brazed or clamped to the body of the saw or cutter, the body is provided with the hard nickel or nickel based coating and the body can be of any suitable material including materials not normally used for such saws or cutters, e.g.
aluminium or aluminium alloy.
In addition to the wear resistant properties and lubricity of the coating, heat absorption is reduced when the saw or cutter is in use due to reduced friction between the saw and material being cut and also between the saw and any support guide.
In the case of large diameter saws or cutters, their weight can be considerably reduced by the use of an aluminium body. The coating also minimises the likelihood of seizure of cutting insert clamping screws and/or wedges in the saw or cutter body due to oxidation or galvanic action.
Particularly where there is a rubbing action not only between the blade or cutter and material being cut but also between the blade and a further blade or support or guide part of the tool as in reciprocating or rotary blade cutters, the coating can be advantageously applied to such blades to minimise friction and wear with the' support or guide part which latter should not be so coated. Thus reciprocating or rotary blade cutters can be provided in accordance with the invention for agricultural, horticultural and garden use such as for hedge cutters or trimmers or for mowing machines. In all these applications the high resistance of the nickel coating to corrosion is beneficial during long periods of storage especially when the cutting blades remain exposed to wet or damp conditions.
Claims (6)
1. A saw blade or a similar sawing or cutting tool or a part or parts thereof is characterised by at least that portion or each such portion of the saw blade or tool which in use engages or contacts material being cut thereby, being coated with a nickel or nickel based deposit by an electroless chemical process.
2. A saw blade according to claim 1 wherein at least that entire portion of a saw blade (including the side faces and cutting teeth thereof) which in use engages or contacts material being cut by the blade, is coated with a said nickel or nickel based deposit.
3. A saw blade or a similar sawing or cutting tool or parts thereof according to claim 1 or 2 wherein the nickel or nickel based coating thereof is further hardened by heat treatment.
4. A sawing or cutting tool according to claim
1, 2 or 3 wherein a part such as a body of the tool is coated with a said nickel or nickel based deposit.
5. A sawing or cutting tool according to claim 4 wherein the said part or body is of aluminium or aluminium alloy.
6. A saw blade or similar sawing or cutting tool or a part or parts thereof wherein the or each portion of the saw blade or tool which in use contacts or engages material being cut by the blade or tool is coated with a nickel or nickel based deposit by an electroless chemical process substantially as herein described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8109422A GB2081176A (en) | 1980-08-05 | 1981-03-25 | Coated Cutting Blade |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8025513 | 1980-08-05 | ||
| GB8109422A GB2081176A (en) | 1980-08-05 | 1981-03-25 | Coated Cutting Blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2081176A true GB2081176A (en) | 1982-02-17 |
Family
ID=26276452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8109422A Withdrawn GB2081176A (en) | 1980-08-05 | 1981-03-25 | Coated Cutting Blade |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2081176A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2218667A (en) * | 1988-05-11 | 1989-11-22 | Sandvik Ab | Cutting devices |
| WO2002072319A1 (en) * | 2001-03-09 | 2002-09-19 | Aquapore Moisture Systems, Inc. | Cutting tool with an electroless nickel coating |
-
1981
- 1981-03-25 GB GB8109422A patent/GB2081176A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2218667A (en) * | 1988-05-11 | 1989-11-22 | Sandvik Ab | Cutting devices |
| WO2002072319A1 (en) * | 2001-03-09 | 2002-09-19 | Aquapore Moisture Systems, Inc. | Cutting tool with an electroless nickel coating |
| US6658967B2 (en) | 2001-03-09 | 2003-12-09 | Aquapore Moisture Systems, Inc. | Cutting tool with an electroless nickel coating |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2034937C1 (en) | Method for electrochemical treatment of products | |
| GB2081176A (en) | Coated Cutting Blade | |
| JPH05112885A (en) | Titanium coating film remover for high-speed tool steel | |
| US4659436A (en) | Particulate diamond-coated metal article with high resistance to stress cracking and process therefor | |
| US6284123B1 (en) | Electroplating formulation and process for plating iron onto aluminum/aluminum alloys | |
| US6322871B1 (en) | Method of treating ceramics for use as tips in saws and other tools or other structures | |
| US2542994A (en) | Electrolytic surface treatment of steel | |
| US2784151A (en) | Electrodeposition | |
| CN218571298U (en) | Mounting structure of special double-edge cutter of fillet | |
| JPS6317621Y2 (en) | ||
| US3424054A (en) | Method of machining metals and apparatus therefor | |
| US3972784A (en) | Method for pretreating surfaces of electrically conductive materials prior to electroplating | |
| Sarwar et al. | Forces, surface finish and friction characteristics in surface engineered single-and multiple-point cutting edges | |
| US20020034652A1 (en) | Method of treating ceramics for use as tips in saws and other tools or other structures | |
| US5616255A (en) | Solution and process for chemically resharpening smoothing tools, forming tools, and cutting tools | |
| GB1583572A (en) | Wear-resistant zinc base metal article and manufacture thereof | |
| CN218694259U (en) | Four-blade flat-tooth milling cutter with wear-resisting function | |
| JP2762203B2 (en) | Chemical remover and method for removing titanium coating film on cemented carbide surface | |
| Scholl et al. | Wear behavior of wood-cutting edges | |
| EP0599948A1 (en) | ELECTROLYTIC BATHING SOLUTION AND METHOD FOR IMPROVING THE SURFACE RESISTANCE OF TOOLS. | |
| JPH06246510A (en) | Cutting member | |
| KR880000096B1 (en) | Saw blade manufacturing method | |
| SU1744148A1 (en) | Method of processing titanium alloy medical instruments | |
| US6745479B2 (en) | Chromium mounted diamond particle cutting tool or wear surface and method | |
| CN217492829U (en) | High-strength milling cutter made of tungsten steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |