GB1385940A - Hardness testing machine - Google Patents
Hardness testing machineInfo
- Publication number
- GB1385940A GB1385940A GB5830772A GB5830772A GB1385940A GB 1385940 A GB1385940 A GB 1385940A GB 5830772 A GB5830772 A GB 5830772A GB 5830772 A GB5830772 A GB 5830772A GB 1385940 A GB1385940 A GB 1385940A
- Authority
- GB
- United Kingdom
- Prior art keywords
- load
- penetrator
- major load
- major
- weight
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/42—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid
- G01N3/44—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid the indentors being put under a minor load and a subsequent major load, i.e. Rockwell system
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
1385940 Testing hardness SKF COMPAGNIE D'APPLICATIONS MECANIQUES 18 Dec 1972 [21 Dec 1971] 58307/72 Heading G1S A Rockwell hardness testing machine, in which a pyramidal diamond-tipped penetrator 1 is impressed into a surface to be tested at first with a minor pre-load and then with a major load, comprises a beam 8 to which the penetrator, supported for vertical movement by a flexible blade 7 and by flexible blades 3, 4, fixed at 5 and 6 is attached between a cross-bladed fulcrum 9 of the beam and an adjustable weight 10 serving as the minor pre-load, the beam having at its end remote from the fulcrum a ring 11 to which a hook 12 carrying the major load is attachable. The penetrator point 2 is protected by a cap 38 flexibly mounted on a diaphragm 40 and an electrically driven cam 20 and follower 19 are operable firstly to allow the weight 10 to act on the penetrator 1 and then to lower a rod 13 supported by flexible blades 14, 15 to apply the major load to the beam, the major load comprising the weight of a plate 18 and, if desired, of additional weights 30, 31 which can be selectively lowered on to or raised from the plate by ties 32, 33 attached to a drum 34 operated by a control knob 35, see also Fig. 6 (not shown). In Fig. 7 (not shown) an alternative arrangement for operating the cords is illustrated. The operation of the machine can be automatically controlled and timed by an electrical circuit which energizes an electromagnet 21, after the surface under test has been relieved of the major load, to connect the penetrator to the feeler of a dial gauge 22 by which the impression formed in the surface can be measured. During load application the cam 20 operates a switch which stops the motor 29 and places in circuit a timer set by a further knob (37), Fig. 4 (not shown), provided to control and adjust the time during which the major load is applied. The starting cycle is initiated with the starting up of motor 29 by contacts made when the cap 38 is pushed up into abutment with the casing part 23.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7145860A FR2165164A5 (en) | 1971-12-21 | 1971-12-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1385940A true GB1385940A (en) | 1975-03-05 |
Family
ID=9087767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5830772A Expired GB1385940A (en) | 1971-12-21 | 1972-12-18 | Hardness testing machine |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3855848A (en) |
| DE (1) | DE2260614B2 (en) |
| FR (1) | FR2165164A5 (en) |
| GB (1) | GB1385940A (en) |
| IT (1) | IT974181B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1561732A (en) * | 1975-10-16 | 1980-02-27 | Sidaway J | Hardnesstesting machine |
| GB1524601A (en) * | 1976-03-16 | 1978-09-13 | Monsanto Ltd | Hardness tester |
| CH612758A5 (en) * | 1977-03-25 | 1979-08-15 | Alfred Ernst | |
| DE3737461C2 (en) * | 1987-11-05 | 1997-06-19 | Helmut Fischer Gmbh & Co | Guide device for a test piece of a hardness measuring device |
| AT398850B (en) * | 1989-12-07 | 1995-02-27 | Emco Maier Gmbh | PENETRATION HARDNESS TESTER |
| US5133210A (en) * | 1990-02-06 | 1992-07-28 | The University Of Maryland | Thermal expansion driven indentation stress-strain system |
| WO2005031314A1 (en) * | 2003-09-26 | 2005-04-07 | C.I.S.A.M. S.A.S. Di A Ernst E C. | Hardness tester with a loading structure of the indenter independent of the stress frame connecting the indenter to the anvil |
| US20130247645A1 (en) * | 2012-03-26 | 2013-09-26 | Matsuzawa Co., Ltd. | Hardness tester and hardness testing method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1141881A (en) * | 1909-08-20 | 1915-06-01 | Tinius Olsen Testing Mach Co | Machine for testing hardness. |
| US1646195A (en) * | 1926-05-29 | 1927-10-18 | Howard M German | Hardness-testing machine and method of testing hardness |
| US2333747A (en) * | 1941-07-18 | 1943-11-09 | Wilson Mechanical Instr Co Inc | Hardness tester |
| DE919437C (en) * | 1951-02-11 | 1954-10-21 | Alex Geiger Maschinenfabrik | Hardness testing device for carrying out the depth difference measurement method |
| US3416367A (en) * | 1965-04-15 | 1968-12-17 | Ernst Alfred | Hardness measuring apparatus |
| US3443422A (en) * | 1965-10-04 | 1969-05-13 | Ametek Inc | Testing machine |
-
1971
- 1971-12-21 FR FR7145860A patent/FR2165164A5/fr not_active Expired
-
1972
- 1972-12-12 DE DE2260614A patent/DE2260614B2/en active Pending
- 1972-12-12 US US00314346A patent/US3855848A/en not_active Expired - Lifetime
- 1972-12-18 GB GB5830772A patent/GB1385940A/en not_active Expired
- 1972-12-19 IT IT54858/72A patent/IT974181B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| DE2260614B2 (en) | 1974-03-21 |
| FR2165164A5 (en) | 1973-08-03 |
| IT974181B (en) | 1974-06-20 |
| DE2260614A1 (en) | 1973-07-05 |
| US3855848A (en) | 1974-12-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |