CN2248103Y - Frame type straightening machine for metal pipe and rod material - Google Patents
Frame type straightening machine for metal pipe and rod material Download PDFInfo
- Publication number
- CN2248103Y CN2248103Y CN 95205912 CN95205912U CN2248103Y CN 2248103 Y CN2248103 Y CN 2248103Y CN 95205912 CN95205912 CN 95205912 CN 95205912 U CN95205912 U CN 95205912U CN 2248103 Y CN2248103 Y CN 2248103Y
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- CN
- China
- Prior art keywords
- alignment
- straightening
- pairs
- utility
- model
- 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 - Fee Related
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Abstract
The utility model relates to a frame type straightening machine for metal pipe and rod materials. In the utility model, at least one straightening unit which is composed of four pairs of straightening rollers is arranged on a rotating frame, wherein, the middle two pairs of straightening rollers (6, 7) are biassed towards a same direction, so a straightening unit with recurved four points are formed. Compared with the existing three-point recurving type straightening machine, the utility model has the advantages that straightening force is reduced by two thirds, and the length of plastic range is increased by two times, so the accuracy of straightening once is higher.
Description
The utility model belongs to alignment equipment, particularly a kind of metal tube bar frame straightener.
Existing metal tube bar straightener all adopts 3 recurvation principles, promptly forms an alignment unit with the alignment roller of three pairs of interlaced arrangements.For the higher steel pipe of non-ferrous metal tubing such as the bigger copper of diameter, aluminium or ask for something and book wall pipe generally to adopt the alignment of frame machine to be advisable.Existing frame straightener is that the alignment roller is installed on the framework.During work, framework rotation is advanced by alignment tubing but is not rotated, and its alignment mode still adopts 3 recurvation principles.The present inventor thinks: the metal tube bar is under 3 recurvation states, and its plastic zone is shorter, therefore, can alignment degree very limited.In order to improve precision, adopt the method that increases the alignment unit usually, this is difficult to realize to the frame machine.Even but like this, its alignment precision also is limited.Particularly bigger to some original curved degree of what pipe bar will realize that the disposable alignment of degree of precision is just more difficult.
The purpose of this utility model is that existing frame straightener is improved, and provides a kind of alignment precision higher metal tube bar frame straightener.
The solution that realizes the utility model purpose is: the metal tube bar frame straightener that is provided, have a rotating frame, and on this rotating frame, be provided with many to the alignment roller.Special feature of the present utility model is the alignment unit that has at least one to be made up of four pairs of alignment rollers, and two pairs of alignment rollers in the middle of it are setovered to same direction.The pipe bar will be in 4 recurvation states in this alignment unit, thereby its plastic zone growth, and the alignment precision will be greatly improved.
Preferred plan of the present utility model is: two pairs of alignment rollers in the middle of in above-mentioned alignment unit are equidistantly setovered to same direction.
Compared with prior art, the utility model is owing to the plastic zone that has increased alignment, thereby the increase of the cycle-index of alignment, and the alignment precision is improved.Because the utility model has adopted 4 recurvation principles, the stress of pipe bar is compared with 3 recurvations bigger variation, and its alignment power obviously reduces.Therefore, give, the clamping force of gripping roll also can reduce, and so not only help the surface quality of protection tube bar, and power consumption reduces obviously.
Below in conjunction with accompanying drawing content of the present utility model is illustrated.
Fig. 1 is an overall structure schematic diagram of the present utility model.
Fig. 2 is the schematic diagram of 4 recurvation alignments of the utility model unit.
Fig. 3 is the bending moment diagram of tubing among Fig. 2.
As shown in Figure 1: rotating frame 1 is driven by reductor 2, and its left end is provided with feeding roller 3, and right-hand member is provided with gripping roll 4.Four pairs of alignment rollers 5,6,7,8 are housed in the framework 1, and their relative position as shown in Figure 2.Two pairs of alignment rollers 5,8 on both sides are positioned on the alignment axis, and middle two pairs of alignment rollers 6,7 are equidistantly setovered to the same side, make tubing 9 be in 4 recurvation states.If the position of above-mentioned four pairs of alignment rollers is respectively A, B, C, D, then the bending moment diagram of tubing 9 as shown in Figure 3.M among the figure
w---the elastic limit moment of flexure; M
a---plastic limit bending moment; T---roll spacing.So: the alignment power equal and opposite in direction at A, B, C, D place is M
a/ t.Plastic zone length S=1.46t.And the alignment power under 3 recurvation states is 3 (M
a/ t), plastic zone length is 0.69t.Hence one can see that: compare with existing 3 recurvation alignments, alignment power of the present utility model has reduced by 2/3rds, and plastic zone length has increased by one times.
The utility model is that the book wall copper pipe of 60-100mm is tested to diameter, and the nonstraightness after the alignment is all less than 0.5%.
Claims (2)
1, a kind of metal tube bar frame straightener, has a rotating frame, on this rotating frame, be provided with many to the alignment roller, it is characterized in that the alignment unit that has at least one to form by four pairs of alignment rollers, two pairs of alignment rollers (6,7) in the middle of it are setovered to same direction, and two pairs of alignment rollers (5,8) on both sides are positioned on the alignment axis.
2, frame straightener as claimed in claim 1 is characterized in that two pairs of alignment rollers (6,7) of centre in above-mentioned alignment unit are equidistantly setovered to same direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95205912 CN2248103Y (en) | 1995-03-21 | 1995-03-21 | Frame type straightening machine for metal pipe and rod material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95205912 CN2248103Y (en) | 1995-03-21 | 1995-03-21 | Frame type straightening machine for metal pipe and rod material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2248103Y true CN2248103Y (en) | 1997-02-26 |
Family
ID=33858003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95205912 Expired - Fee Related CN2248103Y (en) | 1995-03-21 | 1995-03-21 | Frame type straightening machine for metal pipe and rod material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2248103Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100371469C (en) * | 2005-12-16 | 2008-02-27 | 俞学文 | Continuous heat treatment machine for fine long fastener and continuous heat treatment method |
| CN102844128A (en) * | 2010-03-29 | 2012-12-26 | 住友金属工业株式会社 | Method for straightening tube and straightening roll |
| CN103930221A (en) * | 2011-09-13 | 2014-07-16 | Mep意大利美普机械制造有限公司 | Device for correcting shape of bent metal bar and corresponding method |
-
1995
- 1995-03-21 CN CN 95205912 patent/CN2248103Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100371469C (en) * | 2005-12-16 | 2008-02-27 | 俞学文 | Continuous heat treatment machine for fine long fastener and continuous heat treatment method |
| CN102844128A (en) * | 2010-03-29 | 2012-12-26 | 住友金属工业株式会社 | Method for straightening tube and straightening roll |
| CN102844128B (en) * | 2010-03-29 | 2015-03-25 | 新日铁住金株式会社 | Method for straightening tube and straightening roll |
| CN103930221A (en) * | 2011-09-13 | 2014-07-16 | Mep意大利美普机械制造有限公司 | Device for correcting shape of bent metal bar and corresponding method |
| CN103930221B (en) * | 2011-09-13 | 2016-06-29 | Mep意大利美普机械制造有限公司 | The device of shape of metallic rod and corresponding method for bending with sizing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |