GB1592482A - Manually operable screw and method for its manufacture - Google Patents
Manually operable screw and method for its manufacture Download PDFInfo
- Publication number
- GB1592482A GB1592482A GB3962777A GB3962777A GB1592482A GB 1592482 A GB1592482 A GB 1592482A GB 3962777 A GB3962777 A GB 3962777A GB 3962777 A GB3962777 A GB 3962777A GB 1592482 A GB1592482 A GB 1592482A
- Authority
- GB
- United Kingdom
- Prior art keywords
- head
- screw
- stud
- winged
- thickening
- 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
Links
- 238000000034 method Methods 0.000 title claims description 14
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 230000008719 thickening Effects 0.000 claims description 26
- 238000003466 welding Methods 0.000 claims description 18
- 229910001296 Malleable iron Inorganic materials 0.000 claims description 8
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 6
- 230000004927 fusion Effects 0.000 claims description 5
- 238000005242 forging Methods 0.000 claims description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims description 2
- 230000002349 favourable effect Effects 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
- F16B37/16—Wing-nuts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Transmission Devices (AREA)
Description
(54) MANUALLY OPERABLE SCREW AND METHOD FOR ITS MANUFACTURE
(71) I, Fr-.WILHELM KOHLHAGE, of
Hinter der Stadt 22, 5982 Neuenrade Westfalen
Federal Republic of Germany, a citizen of the
Federal Republic of Germany, do hereby declare the invention, for which I pray that a patent may be granted to: me and the method by which it is to be performed, to be particularly described in and by the following state ment: - This invention relates to a manually operable screw, e.g. a winged head screw or a knurled head screw, of the kind which consists of a head and a screw-threaded stud connected together by a welded joint, the head having gripping surfaces for manual engagement by an operator and the stud having a radially outwardly projecting flange-like profiling which serves as an abutment for the head.The invention is also concerned with a method of producing a manually operable screw of this kind.
A winged head screw of this kind is disclosed in U.S. Patent Application No. 2,305, 427. The central portion of the winged head of this screw is formed with an axially extending recess which is open only at its lower end and serves for the reception of the upper end part of the stud. So called welding projections, which are provided on the upper end wall of the stud, abut against the closed upper end wall of the recess in the head when the stud and head are assembled and clamped together prior to the welding operation. During the welding operation, a welding current is passed through these welding projections, causing them to become fused so as to provide a molecular bond between the winged head and the stud. In the finished winged head screw, the flange-like profiling on the stud abuts against the lower surface of the central portion of the winged head.
The terms "upper" and "lower" are used above and later in this specification to indicate the positions of the parts concerned when the screw is vertical with its head uppermost.
The known winged head screw has various disadvantages. First, it is relatively expensive to produce, particularly because the recess in the central portion of the winged head has only one open end. In addition, both the winged head and the screw-threaded stud must be produced to close tolerances in order to ensure that the depth of the recess in the winged head differs from the distance between the top surface of the flange-like profiling and the extremities of the welding projections on the upper end of the stud by the precise amount required to ensure a reliable weld. It is evident that, if these two dimensions do not differ by the .correct amount, either (if the recess is too deep) a faulty weld will be produced or (if the recess is too shallow) the flange-like profiling will not abut against the lower surface of the head after completion of the welding operation.With this known wing head screw, therefore, unless production is carried out with great care, one can expect to obtain a high proportion of rejects.
The present invention has for its object to provide an improved manually operable screw of the kind initially referred to which on the one hand is particularly simple and economic to produce and on the other hand will have a reliable welded connection between the head and the stud even if very close tolerances are not adhered to in the production of the head and stud.
With this object in view, according to the present invention, in the manually operable screw according to this invention, the head is provided with an axially extending through hole, the profiling has the form of a countersunk-head shaped thickening of one end of the stud and rests upon the top surface of the head, and the head and the stud are connected together by a pressure, welded joint, with workpiece fusion, emanating from the profiling.
A screw having the features referred to in the immediately preceding paragraph may be produced from a head formed with an axially extending through hole and a screw-threaded stud provided at one end with a countersunkhead-shaped thickening by a method which comprises the steps of inserting the stud through the hole in the head unfil the thickening thereof abuts against the top surface of the head and then connecting the head and the stud together by electric resistance pressure welding, starting from the zone of contact of the thickening with the part of the top surface
of the head.
An embodiment of the invention will now be
described, with reference to Figures 1 to 3.
Figure 1 shows a stud of a winged head screw
according to the invention;
Figure 2 shows a winged head of a winged
screw head according to the invention; and
Figure 3 shows an assembled winged head screw from the stud and winged nut of Figures
1 and 2.
The screw-threaded stud 1 shown in Figure
1 which may be of rolled mild steel has a screwthreaded portion 2 which in the present case extends over the entire length as far as an upset thickened portion 3.
The winged head 4 shown in Figure 2, which may consist of black heart malleable iron or may be made by a drop-forging process, has wings 6 formed on the centre portion 5 thereof. A cylindrical bore 7 is formed in the centre portion 5.
From the direction in which the wings 6 project, that is to say from the top surface 8 of the head 4, the screw-threaded stud 1 is inserted until the thickened portion 3 thereof abuts against the top surface 8 of the centre portion 5 of the winged head 4.
When the winged head screw 9 is assembled as shown in Figure 3, a connection between the screw-threaded stud 1 and the head 4 is made by electrical resistance welding, in particular by electrical resistance pressure welding, in which one electrode is applied from above against the thickened portion 3 of the stud 1, and another electrode is applied against the underside 10 of the centre portion 5 of the winged head 4 under opposite pressure, and a welded connection, with workpiece fusion, is made at the place denoted by the reference numeral 11, extending from the line of contact between the outer circumferential surface of the thickened portion 3 to that annular edge of the centre portion 5 of the winged head 4 which is located at the junction between the bore 7 and the top surface 8.
It is clear that the winged head screw described above with reference to the accompanying drawings can be made cheaply, technically simply and also with a visually favourable appearance, since the thickened portion 3 can be welded flush or almost flush with the top surface 8 of the centre portion 5.
The invention is also concerned with other manually operated screws, such as, for example, knurled screws, which are made in a similar manner.
WHAT I CLAIM IS:
1. A manually operable screw of the kind which consists of a head and a screw-threaded stud connected together by a welded joint, the head having gripping surfaces for manual engagement by an operator and the stud having a radially outwardly projecting flange-like profiling which serves as an abutment for the head, characterised in that the head is provided with an axially extending through hole, the profiling has the form of a countersunk-headshaped thickening of one end of the stud and rests upon the top surface of the head, and the head and the stud are connected together by a pressure welded joint, with workpiece fusion, emanating from the profiling.
2. A screw according to claim 1, characterised in that the countersunk-head-shaped thickening is formed by upsetting and has a taper angle of between 60 and 1200.
3. A screw according to claim 2, characterised in that the taper angle of the countersunk-head-shaped thickening is between 60 and 90".
4. A screw according to any of the preceding claims, characterised in that the head is composed of malleable cast iron.
5. A screw according to claim 4, characterised in that the head is composed of black heart malleable cast iron.
6. A screw according to any of the preceding claims, characterised in that the screw-threaded stud is composed of rolled mild steel.
7. A screw according to any of the preceding claims, characterised in that the through hole provided in the head is a cylindrical bore.
8. A method of producing a screw having the features claimed in any of claims 1 to 7 from a head formed with an axially extending through hole and a screw-threaded stud provided at one end with a countersunk-headshaped thickening, comprising the steps of inserting the stud through the hole in the head until the thickening thereof abuts against the top surface of the head and then connecting the head and the stud together by electric resistance pressure welding, starting from the zone of contact of the thickening with the part of the top surface of the head.
9. A method of producing a manually operable screw from a head and a screw threaded stud, characterised in that the head, which is made by casting, forging or pressing, is formed with gripping surfaces for manual engagement by an operator and with a smoothwalled, axially extending passage into which the stud is inserted from the upper end of the said passage until a thickening on the end of the stud remote from its leading end comes to rest on the head, the head or the thickening of the stud or each of them having been previously provided with a zone of progressively varying cross-section facing towards the other part, and, after the said thickening has come to rest on the head, the head and the stud are joined together by electric resistance pressure welding, the zone or zones of progressively varying cross-section being deformed as a result of a relative movement between the thickening and the head caused by the application of pressure during the welding operation and the neighbouring zones of the head of the thickening being fused together.
10. A method according to claim 9, charac
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (13)
1 which may be of rolled mild steel has a screwthreaded portion 2 which in the present case extends over the entire length as far as an upset thickened portion 3.
The winged head 4 shown in Figure 2, which may consist of black heart malleable iron or may be made by a drop-forging process, has wings 6 formed on the centre portion 5 thereof. A cylindrical bore 7 is formed in the centre portion 5.
From the direction in which the wings 6 project, that is to say from the top surface 8 of the head 4, the screw-threaded stud 1 is inserted until the thickened portion 3 thereof abuts against the top surface 8 of the centre portion 5 of the winged head 4.
When the winged head screw 9 is assembled as shown in Figure 3, a connection between the screw-threaded stud 1 and the head 4 is made by electrical resistance welding, in particular by electrical resistance pressure welding, in which one electrode is applied from above against the thickened portion 3 of the stud 1, and another electrode is applied against the underside 10 of the centre portion 5 of the winged head 4 under opposite pressure, and a welded connection, with workpiece fusion, is made at the place denoted by the reference numeral 11, extending from the line of contact between the outer circumferential surface of the thickened portion 3 to that annular edge of the centre portion 5 of the winged head 4 which is located at the junction between the bore 7 and the top surface 8.
It is clear that the winged head screw described above with reference to the accompanying drawings can be made cheaply, technically simply and also with a visually favourable appearance, since the thickened portion 3 can be welded flush or almost flush with the top surface 8 of the centre portion 5.
The invention is also concerned with other manually operated screws, such as, for example, knurled screws, which are made in a similar manner.
WHAT I CLAIM IS:
1. A manually operable screw of the kind which consists of a head and a screw-threaded stud connected together by a welded joint, the head having gripping surfaces for manual engagement by an operator and the stud having a radially outwardly projecting flange-like profiling which serves as an abutment for the head, characterised in that the head is provided with an axially extending through hole, the profiling has the form of a countersunk-headshaped thickening of one end of the stud and rests upon the top surface of the head, and the head and the stud are connected together by a pressure welded joint, with workpiece fusion, emanating from the profiling.
2. A screw according to claim 1, characterised in that the countersunk-head-shaped thickening is formed by upsetting and has a taper angle of between 60 and 1200.
3. A screw according to claim 2, characterised in that the taper angle of the countersunk-head-shaped thickening is between 60 and 90".
4. A screw according to any of the preceding claims, characterised in that the head is composed of malleable cast iron.
5. A screw according to claim 4, characterised in that the head is composed of black heart malleable cast iron.
6. A screw according to any of the preceding claims, characterised in that the screw-threaded stud is composed of rolled mild steel.
7. A screw according to any of the preceding claims, characterised in that the through hole provided in the head is a cylindrical bore.
8. A method of producing a screw having the features claimed in any of claims 1 to 7 from a head formed with an axially extending through hole and a screw-threaded stud provided at one end with a countersunk-headshaped thickening, comprising the steps of inserting the stud through the hole in the head until the thickening thereof abuts against the top surface of the head and then connecting the head and the stud together by electric resistance pressure welding, starting from the zone of contact of the thickening with the part of the top surface of the head.
9. A method of producing a manually operable screw from a head and a screw threaded stud, characterised in that the head, which is made by casting, forging or pressing, is formed with gripping surfaces for manual engagement by an operator and with a smoothwalled, axially extending passage into which the stud is inserted from the upper end of the said passage until a thickening on the end of the stud remote from its leading end comes to rest on the head, the head or the thickening of the stud or each of them having been previously provided with a zone of progressively varying cross-section facing towards the other part, and, after the said thickening has come to rest on the head, the head and the stud are joined together by electric resistance pressure welding, the zone or zones of progressively varying cross-section being deformed as a result of a relative movement between the thickening and the head caused by the application of pressure during the welding operation and the neighbouring zones of the head of the thickening being fused together.
10. A method according to claim 9, charac
terised in that the head and the screw-threaded stud are composed of malleable cast iron and mild steel respectively.
11. A method according to claim 10, characterised in that the head and the screw-threaded stud are composed of black heart malleable cast iron and rolled mild steel respectively.
12. A manually operable screw substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
13. A method of making a screw, as claimed in any of claims 8 to 11 and substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU75850A LU75850A1 (en) | 1976-09-22 | 1976-09-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1592482A true GB1592482A (en) | 1981-07-08 |
Family
ID=19728358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3962777A Expired GB1592482A (en) | 1976-09-22 | 1977-09-22 | Manually operable screw and method for its manufacture |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE2742172B2 (en) |
| FR (1) | FR2365719A1 (en) |
| GB (1) | GB1592482A (en) |
| LU (1) | LU75850A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3215382A1 (en) * | 1982-04-24 | 1983-10-27 | Friedrich 7405 Dettenhausen Linnemann | Clamping ring for coupling two flanges of a pipe connection |
| GB2179290A (en) * | 1985-08-20 | 1987-03-04 | Fpt Industries | Locating metal inserts in rotational casting moulds |
| GB2284241A (en) * | 1993-11-26 | 1995-05-31 | Exchem Plc | Anti-theft securing device |
| CN109882484A (en) * | 2019-04-04 | 2019-06-14 | 安徽省矿业机电装备有限责任公司 | A kind of Novel welding type connection spiral pin |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3003000B1 (en) | 2013-03-07 | 2016-08-26 | Samy Abensour | SYSTEM FOR FIXING A BODY ON A WALL. |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE437722A (en) * | ||||
| BE517867A (en) * | ||||
| GB913003A (en) * | 1900-01-01 | |||
| US1139479A (en) * | 1914-08-05 | 1915-05-18 | Latham H Brightman | Bolt-head and process of making same. |
| FR524129A (en) * | 1919-01-18 | 1921-08-30 | Victor Nodiere | Bolt with insert head |
| FR501205A (en) * | 1919-07-01 | 1920-04-07 | Lucien Engler | Special process suitable for iron and steel bolts and screws |
| GB299233A (en) * | 1928-01-02 | 1928-10-25 | Dale Forty & Company Ltd | Improvements in thumb screws or the like |
| US2169460A (en) * | 1938-12-21 | 1939-08-15 | Lyle E Broughton | Socket head screw and method of making the same |
| US2305427A (en) * | 1941-10-20 | 1942-12-15 | Ferro Stamping And Mfg Company | Wing screw |
| DE815430C (en) * | 1950-04-01 | 1951-10-01 | Ermeto G M B H | Wing screw |
| DE862846C (en) * | 1950-11-14 | 1953-01-12 | Walter Kaemper | Wing screw |
| US2816473A (en) * | 1952-06-24 | 1957-12-17 | Katherine G Labbee | Fastening device having a lock cavity for a screw driver |
| DE951787C (en) * | 1953-01-13 | 1956-10-31 | Johann Stiel | Screw part with knurled handle |
| US2985898A (en) * | 1955-05-23 | 1961-05-30 | L M Pierce | Method of making a headed bolt by brazing the head on the bolt end |
| DE1930608U (en) * | 1965-10-19 | 1966-01-05 | Peter Schmetz Industrieofenbau | THREADED SCREW. |
| GB1146750A (en) * | 1966-09-21 | 1969-03-26 | Fredk Mountford Birmingham Ltd | Improvements in foundation bolts |
| GB1142247A (en) * | 1966-09-21 | 1969-02-05 | Fredk Mountford Birmingham Ltd | Improvements in members comprising two threaded parts connected by a shank part |
| GB1190157A (en) * | 1967-08-15 | 1970-04-29 | Torque Tension Bolt Company Pr | Wire Eyebolts |
| DE1815508A1 (en) * | 1967-12-20 | 1969-08-14 | Standard Pressed Steel Co | Screw bolts and process for their manufacture |
| FR1601485A (en) * | 1967-12-20 | 1970-08-24 | ||
| GB1252013A (en) * | 1967-12-20 | 1971-11-03 |
-
1976
- 1976-09-22 LU LU75850A patent/LU75850A1/xx unknown
-
1977
- 1977-09-20 DE DE19772742172 patent/DE2742172B2/en active Granted
- 1977-09-20 FR FR7728307A patent/FR2365719A1/en active Granted
- 1977-09-22 GB GB3962777A patent/GB1592482A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3215382A1 (en) * | 1982-04-24 | 1983-10-27 | Friedrich 7405 Dettenhausen Linnemann | Clamping ring for coupling two flanges of a pipe connection |
| GB2179290A (en) * | 1985-08-20 | 1987-03-04 | Fpt Industries | Locating metal inserts in rotational casting moulds |
| GB2284241A (en) * | 1993-11-26 | 1995-05-31 | Exchem Plc | Anti-theft securing device |
| GB2284241B (en) * | 1993-11-26 | 1997-04-16 | Exchem Plc | Fixing tendon |
| CN109882484A (en) * | 2019-04-04 | 2019-06-14 | 安徽省矿业机电装备有限责任公司 | A kind of Novel welding type connection spiral pin |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2365719A1 (en) | 1978-04-21 |
| DE2742172A1 (en) | 1978-03-23 |
| FR2365719B1 (en) | 1983-11-10 |
| LU75850A1 (en) | 1977-05-04 |
| DE2742172B2 (en) | 1980-10-23 |
| DE2742172C3 (en) | 1984-10-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |