CN102744576A - Machining method of elevator safety tongs wedge block - Google Patents
Machining method of elevator safety tongs wedge block Download PDFInfo
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- CN102744576A CN102744576A CN201210255044XA CN201210255044A CN102744576A CN 102744576 A CN102744576 A CN 102744576A CN 201210255044X A CN201210255044X A CN 201210255044XA CN 201210255044 A CN201210255044 A CN 201210255044A CN 102744576 A CN102744576 A CN 102744576A
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- wedge block
- safety tongs
- treatment
- carrying
- elevator safety
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Abstract
The invention provides a machining method of an elevator safety tongs wedge block, which relates to a machining process of a metal part, in particular to the technical field of heat treatment of the safety tongs wedge block. The method comprises the following steps of: after forging a low-carbon quality structural steel A3, carrying out normalizing treatment on the low-carbon quality structural steel A3 at 920 DEG C; and then milling and molding the low-carbon quality structural steel A3; carrying out carburizing treatment on a molded wedge block at 930 DEG C; carrying out surface hardening treatment on the wedge block at 780-800 DEG C; and finally, carrying out blackening treatment on the wedge block. Through the adoption of the method provided by the invention, the surface of the elevator safety tongs wedge block obtains higher hardness, the surface wear resistance is improved, friction couple coefficient between the wedge block surface and the surface of a guide rail is improved, the guide rail is protected, and the maintenance cost is reduced; meanwhile, as a core part of the elevator safety tongs wedge block is still kept with enough plasticity and toughness, the wedge block cannot be crushed in a high pressure working state and the functions of safety tongs are reliably achieved; therefore, the development space of a large-tonnage elevator is enlarged.
Description
Technical field
The present invention relates to the processing technology of metal parts, particularly the heat treatment technics field of safety tongs voussoir.
Background technology
Safety tongs is one of safety component of elevator, and said voussoir then is the vital part of safety tongs, is mainly used in the large-tonnage safety tongs more than 10 tons.
The former process using 40Gr steel of voussoir; Be shaped through machining, the surface blackening processing forms behind heat-treatment quenching again, because of its piece surface and the close HRC45 of core hardness～50; Receive down in working order to be prone to produce break the forfeiture proper function under the above positive pressure of 100KN.
The existing 45# steel of using instead is in addition handled through heat treatment quenching and tempering through the machining voussoir that is shaped again, and hardness is in HB195～210; Close with lift car riser guide hardness because of it, under very big normal pressure duty, the sliding-frictional resistance of generation is very big; Though car stop out of control is had very great help, fricative temperature can reach more than 1,000 degree, meeting major injury voussoir and working face of guide rail; And once change guide rail, then can cause the loss of units up to ten thousand.
Summary of the invention
The present invention seeks to propose a kind of processing method of the elevator safety gear voussoir that improves the quality of products.
Technical scheme of the present invention is: after adopting A3 low-carbon (LC) high-quality structural steel to forge; Adopt 920 ℃ of temperature normalized treatment; Milling Process is shaped then; Voussoir after will being shaped again carries out Carburization Treatment under 930 ℃ of temperature, again in 780～800 ℃ of temperature conditions lower surface Quenching Treatment, the processing of turning black at last.
The present invention can make the refinement of part material crystalline structure after normalized treatment, suitably improve its intensity; Carburization Treatment can make the product surface phosphorus content increase to .18～0.2; Quenching Treatment can make product surface hardness reach HRC54～58, and heart portion material hardness then is controlled at HRC22～26; Last surface blackening is handled, and it is anti-oxidant attractive in appearance with increase to improve product surface.
In a word, through technology of the present invention, elevator safety gear voussoir surface has obtained higher hardness; Improved the surface abrasion resistance degree, improved and guide rail surface between friction pay a coefficient, protected guide rail to reduce maintenance expense; Still maintain enough plasticity and toughness because of its heart portion simultaneously, make voussoir under the high-pressure work state, not broken; Make the function of safety tongs be able to reliable realization, thereby promoted the development space of large-tonnage elevator.
The specific embodiment
The process operation step:
1, adopt A3 low-carbon (LC) high-quality structural steel to forge.
2, the goods that forge are adopted 920 ℃ of temperature normalized treatment, make the refinement of part material crystalline structure.
3, Milling Process forms the voussoir semi-finished product.
4, the voussoir semi-finished product are carried out Carburization Treatment under 930 ℃ of temperature, make case carbon increase to 0.18～0.2mm.
5,780～800 ℃ of temperature conditions lower surface Quenching Treatment, case hardness is reached to HRC54～58, heart portion material hardness then is controlled at HRC22～26.
6, surface blackening is handled, and is attractive in appearance with increase to improve surface oxidation-resistant.
Claims (1)
1. the processing method of elevator safety gear voussoir; It is characterized in that: after adopting A3 low-carbon (LC) high-quality structural steel to forge; Adopt 920 ℃ of temperature normalized treatment, Milling Process is shaped then, and the voussoir after will being shaped again carries out Carburization Treatment under 930 ℃ of temperature; Again in 780～800 ℃ of temperature conditions lower surface Quenching Treatment, the processing of turning black at last.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210255044XA CN102744576A (en) | 2012-07-23 | 2012-07-23 | Machining method of elevator safety tongs wedge block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210255044XA CN102744576A (en) | 2012-07-23 | 2012-07-23 | Machining method of elevator safety tongs wedge block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102744576A true CN102744576A (en) | 2012-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210255044XA Pending CN102744576A (en) | 2012-07-23 | 2012-07-23 | Machining method of elevator safety tongs wedge block |
Country Status (1)
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| CN (1) | CN102744576A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104070126A (en) * | 2014-04-22 | 2014-10-01 | 湖南千跃机械制造有限公司 | Forging jaw machining method |
| CN106276478A (en) * | 2016-08-24 | 2017-01-04 | 南通亨特电器有限公司 | A kind of elevator safety gear voussoir and processing method thereof |
| CN106282792A (en) * | 2016-08-24 | 2017-01-04 | 南通亨特电器有限公司 | A kind of processing method of elevator safety gear voussoir |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040094234A1 (en) * | 2002-11-15 | 2004-05-20 | Curtis Machine Company, Inc. | Methods and apparatus for reducing the sound level of a gearbox |
| CN101131183A (en) * | 2007-07-17 | 2008-02-27 | 邹树林 | Manufacturing method for cross axle of universal coupling |
| CN102011055A (en) * | 2010-12-10 | 2011-04-13 | 燕山大学 | Method for manufacturing hard bainite bearing |
| CN102162069A (en) * | 2010-02-23 | 2011-08-24 | 宝山钢铁股份有限公司 | Flying-shear main-transmission gearwheel steel and preparation method thereof |
| CN102581574A (en) * | 2012-03-20 | 2012-07-18 | 江国辉 | Method for machining inner gear rings |
-
2012
- 2012-07-23 CN CN201210255044XA patent/CN102744576A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040094234A1 (en) * | 2002-11-15 | 2004-05-20 | Curtis Machine Company, Inc. | Methods and apparatus for reducing the sound level of a gearbox |
| CN101131183A (en) * | 2007-07-17 | 2008-02-27 | 邹树林 | Manufacturing method for cross axle of universal coupling |
| CN102162069A (en) * | 2010-02-23 | 2011-08-24 | 宝山钢铁股份有限公司 | Flying-shear main-transmission gearwheel steel and preparation method thereof |
| CN102011055A (en) * | 2010-12-10 | 2011-04-13 | 燕山大学 | Method for manufacturing hard bainite bearing |
| CN102581574A (en) * | 2012-03-20 | 2012-07-18 | 江国辉 | Method for machining inner gear rings |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104070126A (en) * | 2014-04-22 | 2014-10-01 | 湖南千跃机械制造有限公司 | Forging jaw machining method |
| CN106276478A (en) * | 2016-08-24 | 2017-01-04 | 南通亨特电器有限公司 | A kind of elevator safety gear voussoir and processing method thereof |
| CN106282792A (en) * | 2016-08-24 | 2017-01-04 | 南通亨特电器有限公司 | A kind of processing method of elevator safety gear voussoir |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121024 |