CN2044265U - Cold rolling screw steel bar - Google Patents
Cold rolling screw steel bar Download PDFInfo
- Publication number
- CN2044265U CN2044265U CN 88217140 CN88217140U CN2044265U CN 2044265 U CN2044265 U CN 2044265U CN 88217140 CN88217140 CN 88217140 CN 88217140 U CN88217140 U CN 88217140U CN 2044265 U CN2044265 U CN 2044265U
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- CN
- China
- Prior art keywords
- steel bars
- utility
- model
- concrete
- steel
- 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- Withdrawn
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Abstract
The utility model relates to the improvement of steel bars. At present, the concrete steel bars in the building trade mostly adopt hot rolling thread steel bars and cold drawn steel bars, and the defects of lower intensity, the waste of steel products, poor adhesive force with the concrete exist. In the utility model, three longitudinal steel bars are made at the surface of the steel bar, spiral transverse steel bars interlaced each other are arranged among the three longitudinal steel bars, and the utility model is made by the technological process of cold rolling. The utility model has the characteristics of high intensity, low production cost, good adhesive force with the concrete, obvious social benefit, etc.
Description
The utility model relates to a kind of improvement of reinforcing bar.
The building trade concrete reinforcing bars mostly adopts two kinds of hot-rolled screw thread reinforcing bar and cold drawn wires at present.Wherein the hot-rolled screw thread reinforcing bar is owing to be subjected to the restriction of working condition, diameter is less than the indented bars of 8mm, basically there is not production unit, some small-size concrete members, can only adopt hot rolling unit's steel or cold drawn wire, in use there is defective in various degree again respectively in these two kinds of steel.The former intensity is on the low side, has to strengthen the reinforcing bar section, has increased the consumption of reinforcing bar; Though the latter has higher intensity, because smooth surface, and produce slippage between the concrete, can not make full use of the intensity of steel.
The utility model purpose provides a kind of intensity height, the novel cold-rolled threaded reinforcing steel good with concrete conglutination power.
The utility model is the improvement to former use reinforcing bar, adopt cold rolling process, rebar surface three longitudinal ribs 1 have been made, three groups of spirality horizontal bars 2 interlaced with each other are arranged therebetween, spirality horizontal bar 2 can be made the willow leaf shape, technological process is: raw material advances factory → pickling → cleaning → coating drying → cold-drawn → cold rolling → surface, dimensional gaughing etc., produces the high-performance steel with common straightcarbon steel.
The utlity model has the intensity height, cost of production is low, and characteristics such as bonding force is good between the concrete.
Accompanying drawing 1 is the utility model structural representation.
Accompanying drawing 2 is that Figure 1A is to view.
Below in conjunction with accompanying drawing the utility model is described further.
The utility model consider increase to greatest extent its intensity and and concrete between bonding force, cold-rolled threaded reinforcing steel is made circle, its A is uniform three longitudinal ribs that distribute on the section circumference, the spirality horizontal bar is crescent at its place, cross section and distributes, three groups of spirality horizontal bars have certain angle of cut each other, to prevent that pressure from concentrating on a certain position of reinforcing bar accident and fractureing, the utility model is after cold rolling, the tensile strength of product is all more than 65 kilograms, the strength limit that is equivalent to cold drawn wire, yield limit б 0.2 is more than 62 kilograms, limit of proportionality б p. is also greater than 44 kilograms, 180 degree bending and un are all more than 4 times, maximum has 12 times, elongation per unit length is all more than 3%, and these technical performances meet the standard-required of cold drawn wire fully.
The utility model is used as arrangement of reinforcement in order to the common cold drawn wire that replaces equal section in prestressed cored slab, can eliminate the sliding phenomenon of reinforcing bar, improve the bearing capacity of cored slab, improve quality, can shorten conditioned time simultaneously, improve output. If take full advantage of the strong characteristics of its bonding force, can reduce concrete grade, save cement, result of the test shows, every cubic meter of concrete member is saved cement more than 50 kilograms at least, in the KB30-3 cored slab, and can saving steel more than 36%, 3.5 kilograms of every plate saving steels, average every square metre of floor can reduce cost about 2 yuan.
Claims (3)
1. cold-rolled threaded reinforcing steel is characterized in that the surface has three longitudinal ribs 1, and three groups of spirality horizontal bars 2 interlaced with each other are arranged therebetween.
2. according to the described cold-rolled threaded reinforcing steel of claim 1, it is characterized in that reinforcing bar cross section spirality horizontal bar is crescent and distributes 3.
3. according to the described cold-rolled threaded reinforcing steel of claim 1, it is characterized in that the spirality horizontal bar can make the willow leaf shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88217140 CN2044265U (en) | 1988-11-26 | 1988-11-26 | Cold rolling screw steel bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88217140 CN2044265U (en) | 1988-11-26 | 1988-11-26 | Cold rolling screw steel bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2044265U true CN2044265U (en) | 1989-09-13 |
Family
ID=4849703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88217140 Withdrawn CN2044265U (en) | 1988-11-26 | 1988-11-26 | Cold rolling screw steel bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2044265U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100431724C (en) * | 2004-04-05 | 2008-11-12 | 朱晖 | Cold-rolling nicking reinforcing bar with rib high-strength and low relaxation, production and production line thereof |
| CN100436728C (en) * | 2003-07-03 | 2008-11-26 | 联邦国营企业“建筑科研中心” | Intended reinforcement bar |
-
1988
- 1988-11-26 CN CN 88217140 patent/CN2044265U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100436728C (en) * | 2003-07-03 | 2008-11-26 | 联邦国营企业“建筑科研中心” | Intended reinforcement bar |
| CN100431724C (en) * | 2004-04-05 | 2008-11-12 | 朱晖 | Cold-rolling nicking reinforcing bar with rib high-strength and low relaxation, production and production line thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |