GB2202470A - Method of manufacturing a blank or article, particularly for painters' cutlery - Google Patents

Method of manufacturing a blank or article, particularly for painters' cutlery Download PDF

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Publication number
GB2202470A
GB2202470A GB08804738A GB8804738A GB2202470A GB 2202470 A GB2202470 A GB 2202470A GB 08804738 A GB08804738 A GB 08804738A GB 8804738 A GB8804738 A GB 8804738A GB 2202470 A GB2202470 A GB 2202470A
Authority
GB
United Kingdom
Prior art keywords
blade
bolster
steel
blank
carbon content
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.)
Granted
Application number
GB08804738A
Other versions
GB8804738D0 (en
GB2202470B (en
Inventor
Glyn Rodney Atkinson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hamilton & Co
Original Assignee
Hamilton & Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from GB878704610A external-priority patent/GB8704610D0/en
Application filed by Hamilton & Co filed Critical Hamilton & Co
Priority to GB8804738A priority Critical patent/GB2202470B/en
Publication of GB8804738D0 publication Critical patent/GB8804738D0/en
Publication of GB2202470A publication Critical patent/GB2202470A/en
Application granted granted Critical
Publication of GB2202470B publication Critical patent/GB2202470B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G1/00—Handle constructions
    • B25G1/10—Handle constructions characterised by material or shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/60—Making other particular articles cutlery wares; garden tools or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/002—Resistance welding; Severing by resistance heating specially adapted for particular articles or work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G3/00—Attaching handles to the implements
    • B25G3/34—Attaching handles to the implements by pressing the handle on the implements; using cement or molten metal, e.g. casting, moulding, by welding or the like

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

A steel blade (3), a steel bolster (1) and means (2) for use in attaching a handle thereto are manufactured by providing separately the blade and the bolster, said means being integrally formed with the blade or the bolster, and welding the bolster and the blade to each other by electrical flash butt welding or electrical resistance welding. Preferably the bolster and the tang are formed together by forging of a blank of steel, which is non-stainless steel. The steel of the blade may have a relatively high carbon content as compared with the steel of the bolster. Accordingly the blade may be flexible, whilst the bolster may be made by forging. <IMAGE>

Description

METHOD OF MANUFACTURING A BLANK OR ARTICLE, PARTICULARLY FOR PAINTERS1 CUTLERY The present invention relates to a method of manufacturing a blank or article (hereinafter referred to as a "blank", particularly for painters' cutlery, the blank comprising a blade, a bolster and means, such as a tang, for use in attaching a handle to the blank.
Conventionally in manufacturing such a blank, the blade, the bolster and the tang are produced as a single forging of carbon steel. The blade accordingly has the same carbon content (herein by "carbon content" we mean proportion of carbon by weight) as the bolster and the tang. Since the blank is made by forging, the carbon content has to be kept low, thereby reducing the durability and flexibility of the blade as compared with the case if the carbon content were higher.
The present invention aims to provide an improved method of manufacturing a blank comprising a blade, a bolster and means, such as a tang, for use in attaching a handle to the blank whereby the carbon content of the blade may be higher and accordingly the durability and flexibility of the blade may be increased.
In accordance with the present invention there is provided a method of manufacturing a blank comprising a steel blade, a bolster and means for use in attaching a handle to the blank, comprising providing the steel blade and the steel bolster, the means for attaching the handle to the blank being integrally formed with the blade or the bolster, and welding the bolster and the blade to each other by electrical flash butt welding or electrical resistance welding.
Said means may be a tang and is hereinafter referred to as a tang.
The blade may be formed of non-stainless steel having a relatively high carbon content, e.g. above 0.7% and typically about 0.80%.
Such steel has better hardening characteristics than steel of a lower carbon content. Accordingly the blade may be made more flexible than blades made as hitherto with steel of a lower carbon content.
According to a preferred aspect of the invention said means is integrally formed with the bolster.
The bolster and the tang may be formed together by forging of a non-stainless steel blank, i.e. a blank of steel which is non-stainless. The bolster and the tang may have a relatively low carbon content, e.g. below 0.6% and typically in the range 0.35 to 0.48%.
Normally the difference in carbon content between (a) the blade (having a relatively high carbon content) and (b) the bolster and the tang (having a relatively low carbon content) would be at least 0.2% and more usually at least 0.258.
In an alternative aspect of the invention the means for use is attaching theblank to an article is integrally formed with the blade and the bolster is provided in two halves or separate portions which are welded to the blade on either side of the blade by electrical resistance welding. The carbon contents of the blade and the bolster, and the difference between such contents, may be as specified above.
The blade (and the tang if integrally formed therewith) may be formed by pressing from cold-rolled strip steel. The blade when so formed has a more consistent carbon content and may be cut to more precise dimensions and to a more precise shape than the blade of a blank formed, as hitherto, by forging.
After the blade has been welded to the bolster, the weld area, that is the parts of the bolster and the blade which have been heated and melted during the welding, may be annealed and then hardened and tempered.
The invention is further described below by way of example with reference to the accompanying drawings, wherein: Figures 1A and 1B are a plan view and a side view respectively of an integral bolster and tang and a separate blade prior to the bolster and the blade being welded together; Figure 2 is a plan view of the bolster, the tang and the blade of Figure 1 after the bolster and the blade have been welded together to form a blank; and Figure 3 is a plan view of another blank comprising a bolster, a tang and a blade manufactured by the method of the invention.
Referring to Figure 1 a bolster 1 and a tang 2 are formed integrally by forging a blank of steel comprising nominally 0.5% carbon by weight. A blade 3 is formed from steel comprising nominally 0.8% (i.e. 0.78 to 0.82%) carbon by weight.
In carrying out the method of the invention, edge 1' at the nose of the bolster 1 and edge 3' at the root of the blade are butted against each other or held spaced apart by only a small distance (e.g. lem). The bolster 1 and the blade 3 are then electrically flash butt welded together. In carrying out this welding, the regions of the bolster 1 and the blade 3 for a distance of about 2rtrn from the edges 1' and 3' respectively are melted and fused together to give a weld area or joint 5 about 4m wide. There is accordingly formed a blank comprising the bolster, the tang and the blade.
Subsequently the blank is annealed across the weld area 5, hardened and tempered. The weld area 5 in the blank so treated is stronger than if the bolster and blade had been made integrally by forging as it is thicker at that region than the blade and the bolster at either side of the weld area and may in fact be stonger than either of the bolster and the blade at either side of the weld area.
After annealing, hardening and tempering, the blade is ground to its desired thickness and the weld area 5 ground flush with the bolster and the blade.
Figure 3 shows a further blank which may be formed by the method of the invention as described above. In this figure, the same reference numerals as used in Figures 1A, 1B and 2 are used for like parts.
As shown in Figures LA, 1B and 2, the tang 2 is in the form of a blunt spike. As shown in Figure 3 the tang 2 is flat.
Where the tang 2 of the blank is in the form of a spike, the tang may be located in a handle to form a complete tool. Where the tang 2 of the blank is flat, two half handles in the form of scales may be fastened on either side of the tang to form a complete tool. In either case the complete tool may be useful as a filler knife or a stripper or scraper or, if the blade has a suitable shape (different from the shapes shown in the drawings), as a putty knife.
It is envisaged that the invention may have applications outside the field of painters' cutlery.

Claims (14)

1. A method of manufacturing a blank or article comprising a steel blade, a steel bolster and means for use in attaching a handle to the blank, the method comprising providing separately the blade and the bolster, said means being integrally formed with the blade or the bolster, and welding the bolster and the blade to each other by electrical flash butt welding or electrical resistance welding.
2. A method according to claim 1, wherein the blade is formed of steel,being non-stainless steel, having a high carbon content.
3. A method according to claim 2, wherein the steel of the blade has a carbon content above 0.7% by weight (based on the steel).
4. A method according to any preceeding claim, wherein the bolster and said means are formed together by forging of a blank of steel which is non-stainless steel.
5. A method according to any preceding claim, wherein the bolster has a low carbon content.
6. A method according to claim 5, wherein the bolster is of steel having a carbon content of 0.35 to 0.48% by weight (based on the steel).
7. A method according to any preceding claim, wherein the steel of the blade has a carbon content at least 0.2% by weight greater than the carbon content of the steel of the bolster.
8. A method according to any of claims 1 to 3, wherein the means for use in attaching the blank to an article is integrally formed with the blade and the bolster is provided in two separate half portions which are welded to the blade on either side of the blade and said means.
9. A method according to any preceding claim, wherein the blade is formed by pressing from a cold-rolled steel strip.
10. A method according to any preceding claim, wherein after the blade and the bolster have been welded together the weld area is annealed and then hardened and tempered.
11. A method according to claim 10, wherein after the annealing, hardening and tempering the blade is ground to a desired thickness.
12. A method according to claim 10 or 11, wherein after the annealing, hardening and tempering the weld area is ground flash with the bolster and the blade.
13. A method according to any preceding claim, wherein said means is a tang.
14. A method of manufacturing a blank substantially as described herein with reference to and as illustrated in the accompanying drawings.
GB8804738A 1987-02-27 1988-02-29 Method of manufacturing a blank or article, particularly for painters' cutlery Expired - Lifetime GB2202470B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8804738A GB2202470B (en) 1987-02-27 1988-02-29 Method of manufacturing a blank or article, particularly for painters' cutlery

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB878704610A GB8704610D0 (en) 1987-02-27 1987-02-27 Manufacturing article for painters'cutlery
GB8804738A GB2202470B (en) 1987-02-27 1988-02-29 Method of manufacturing a blank or article, particularly for painters' cutlery

Publications (3)

Publication Number Publication Date
GB8804738D0 GB8804738D0 (en) 1988-03-30
GB2202470A true GB2202470A (en) 1988-09-28
GB2202470B GB2202470B (en) 1991-11-20

Family

ID=26291949

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8804738A Expired - Lifetime GB2202470B (en) 1987-02-27 1988-02-29 Method of manufacturing a blank or article, particularly for painters' cutlery

Country Status (1)

Country Link
GB (1) GB2202470B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0782905A3 (en) * 1995-12-30 1997-10-29 Neil Holdings Ltd James Hand tool with forged connector for securing tool portion to handle

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191649A (en) * 1922-03-06 1923-01-18 Harry Frederick Atkins Improvements in or relating to the manufacture of cutlery
GB584282A (en) * 1944-08-09 1947-01-10 George Herbert Fletcher Improvements in and relating to table and like cutlery
GB591988A (en) * 1944-05-03 1947-09-04 B & J Sippel Ltd Improvements in knives
GB883022A (en) * 1957-03-14 1961-11-22 Firth Vickers Stainless Steels Ltd Improvements in and relating to the manufacture of metal articles of different thicknesses
GB1348191A (en) * 1973-01-26 1974-03-13 Pear Tree Tools Ltd Manufacture of light edge tools
GB1509310A (en) * 1975-06-13 1978-05-04 Eickhorn R Knives
GB1510088A (en) * 1975-09-25 1978-05-10 Wmf Wuerttemberg Metallwaren Manufacture of knives
GB1525301A (en) * 1976-10-06 1978-09-20 Betts & Sons Ltd S Method of forming hand tools

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191649A (en) * 1922-03-06 1923-01-18 Harry Frederick Atkins Improvements in or relating to the manufacture of cutlery
GB591988A (en) * 1944-05-03 1947-09-04 B & J Sippel Ltd Improvements in knives
GB584282A (en) * 1944-08-09 1947-01-10 George Herbert Fletcher Improvements in and relating to table and like cutlery
GB883022A (en) * 1957-03-14 1961-11-22 Firth Vickers Stainless Steels Ltd Improvements in and relating to the manufacture of metal articles of different thicknesses
GB1348191A (en) * 1973-01-26 1974-03-13 Pear Tree Tools Ltd Manufacture of light edge tools
GB1509310A (en) * 1975-06-13 1978-05-04 Eickhorn R Knives
GB1510088A (en) * 1975-09-25 1978-05-10 Wmf Wuerttemberg Metallwaren Manufacture of knives
GB1525301A (en) * 1976-10-06 1978-09-20 Betts & Sons Ltd S Method of forming hand tools

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0782905A3 (en) * 1995-12-30 1997-10-29 Neil Holdings Ltd James Hand tool with forged connector for securing tool portion to handle

Also Published As

Publication number Publication date
GB8804738D0 (en) 1988-03-30
GB2202470B (en) 1991-11-20

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 20080228