CN100341660C - Method for punching and assembling safety column by punching distorted points - Google Patents
Method for punching and assembling safety column by punching distorted points Download PDFInfo
- Publication number
- CN100341660C CN100341660C CNB2003101224730A CN200310122473A CN100341660C CN 100341660 C CN100341660 C CN 100341660C CN B2003101224730 A CNB2003101224730 A CN B2003101224730A CN 200310122473 A CN200310122473 A CN 200310122473A CN 100341660 C CN100341660 C CN 100341660C
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- outer tube
- punching press
- mandrel
- diameter
- deformation point
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Abstract
The present invention relates to the improvement of a method for assembling a safety pipe column of an automobile steering wheel, which belongs to automotive part assembling technology. The method has the steps that a core rod is inserted into an outer sleeve pipe and is fixed, a deformation point is punched, a mandrel forcedly passes through the inner diameter of the punched outer sleeve pipe, and an inner sleeve pipe is directly pressed into the outer sleeve pipe by a pneumatic supporting head. The present invention can ensure the accuracy of contractive pressure thresholds of the inner sleeve pipe and the outer sleeve pipe, the consistency of the qualification rate and the performance of a product is greatly increased, and the hidden trouble of the steering wheel for the personal safety of a driver is eliminated.
Description
Technical field
The invention belongs to the auto parts and components mounting technology, relate to improvement vehicle steering safety tubing string assembly method.
Background technology
Vehicle steering safety tubing string is in order to alleviate the structural member that motor-vehicle accident damages the driver.When it is subjected to the external force pressure of overrate, can inwardly shrink, when getting into an accident to alleviate, steering wheel is to driver's injury.Existing assembly method is the combination pressing.This process is placed on inside and outside two sleeve pipes on the mould after the axial location, in the inner mandrel location of inserting of inner sleeve, directly utilizes common punch press in the moulding of outer tube upper punch compressive strain point then.The problem of this method is, because the diameter tolerance difference of internal and external casing, and stamping forming deformation point size difference, cause after the punching press combination degree of internal and external casing widely different, pressure threshold dispersiveness when making internal and external casing begin to shrink after stressed is very big, can not satisfy the requirement of technical standard.In case, can't carry out one by one inspection owing to just scrap after this product inspection pressure threshold value, can only inspect by random samples, thus cause substandard product to dispatch from the factory probably, to driver's life security formation hidden danger.
Summary of the invention
The objective of the invention is: a kind of vehicle steering safety tubing string punching press assembly method that can accurately guarantee internal and external casing systolic pressure threshold value is provided.
Technical scheme of the present invention is: a kind ofly it is characterized in that towards point type safety tubing string punching press assembly method,
(1) plug is inserted in the outer tube, and outer tube and plug are fixed on the mould, require diameter of mandrel less than outer tube internal diameter 0.5～1mm;
(2) use common punch press assigned position punching press deformation point radially on outer tube, each deformation point is a rectangular configuration, the long length of side 9～12mm of rectangle, the long 6～10mm of minor face, deformation point is two rows, the quantity of every row's deformation point is 2～10, every row's deformation point evenly distributes along the outer tube circumference, and two arrange the 30～70mm that is spaced apart of deformation points, after the punching press, should be along the distance between the inner projection of two deformation points on the same diameter less than the external diameter of inner sleeve, its difference range is: 0.05～0.55mm;
(3) mandrel that uses hard material is by force by the outer tube internal diameter after the punching press, and the external diameter of mandrel is greater than the distance between two deformation point the inner projections on the same diameter, and its difference is 0.1～0.3mm;
(4) inner sleeve directly is pressed in the outer tube with pneumatic top, and strict location, the size that is pressed into power is selected according to the regulation of different automobile types.
Advantage of the present invention is: can guarantee the accuracy of internal and external casing systolic pressure threshold value, improve the qualification rate of product and the uniformity of performance greatly, eliminate the hidden danger of steering wheel to driver's personal safety.
Description of drawings
Fig. 1 utilizes plug location, the schematic diagram of punching press outer tube.
Fig. 2 has formed the outer tube schematic diagram that rectangle dashes point, and 1 is that outer tube is towards point among the figure.
Fig. 3 utilizes the hard mandrel by force by outer tube internal diameter schematic diagram, thus in the check and correction outer tube dash a little between distance.1 is that outer tube is towards point, the 2nd, mandrel among the figure.
Fig. 4 is the outer tube schematic diagram after the calibration, and at this moment, the spacing and the outside diameter of mandrel that dash point are measure-alike, and have produced sclerosis towards point.
Fig. 5 is pressed into the inner sleeve schematic diagram, and in process of press in, monitoring is pressed into the power size.1 is that outer tube is towards point, the 3rd, inner sleeve among the figure.
Fig. 6 is the internal and external casing schematic diagram after the assembling.
The specific embodiment
Below the present invention is described in further details.Of the present invention towards point type safety tubing string punching press assembly method, its processing step is as follows:
(1) plug is inserted in the outer tube, and outer tube and plug are fixed on the mould, require diameter of mandrel to be slightly less than casing inner diameter 0.5～1mm.
(2) use common punch press assigned position punching press deformation point radially on outer tube, each deformation point is a rectangular configuration, the long length of side 9～12mm of rectangle, the long 6～10mm of minor face, deformation point is two rows, the quantity of every row's deformation point is 2～10, every row's deformation point evenly distributes along the outer tube circumference, and two arrange the 30～70mm that is spaced apart of deformation points, after the punching press, should be along the distance between the inner projection of two deformation points on the same diameter less than the external diameter of inner sleeve, its difference range is: 0.05～0.55mm.
(3) mandrel that uses hard material is by force by the outer tube internal diameter after the punching press, and the external diameter of mandrel is greater than the distance between two deformation point the inner projections on the same diameter, and its difference is 0.1～0.3mm.
(4) inner sleeve directly is pressed in the outer tube with pneumatic top, and strict location, the size that is pressed into power is selected according to the regulation of different automobile types.
Embodiment
1, a kind of safe tubing string punching press assembling of minicar, outer tube adopts the moulding seamless steel pipe, the application mould stamps out two and arranges totally eight distortion towards point, 4 of every rows dash point and evenly distribute on circumference, two rows dash point and axially go up at a distance of 52mm, and, the rectangular dimension that guarantees to dash point 11.5 * 8mm, through after the punching press, be 31.5mm along the distance between two inner projections of deformation point on the same diameter.
2, with the mandrel of hard material, its outside dimension is φ 31.7mm, by force by the outer tube internal diameter after punching press, at this moment, because the external diameter of mandrel is slightly larger than the distance between the punching press backlash point, therefore, on the outer tube dash a little between size just become outside diameter of mandrel's size of being inserted.And this technology can make outer tube dash a generation work hardening, makes size, the fixed in shape of dashing point motionless
3, using drift, no-go gage detects this sleeve pipe and dashes the minimum range size of point whether in φ 31.7 ± 0.05mm claimed range, to determine the uniformity of the product processing that flowing water is produced.
4, inner sleeve directly is pressed in the outer tube with pneumatic top, and strict location, and within the limits prescribed whether the size that monitors the power that is pressed into.This is pressed into the power size is 1180～2200N, to guarantee the contraction defencive function after car load collides.Because when assembling, outer tube dashed the point not redeformation of having hardened, cause inner sleeve in the stopping of dashing some generation plastic deformation down during assembling, and make two parts be fixed together.When this part was subjected to external force and need compresses, because that compression direction is pressed into direction during with assembling is consistent, therefore, the strength when system also will be according to assembling was compressed, so, monitor that assembling is pressed into the size of power, i.e. the requirement of assembly compression stress after the assembling as can be known.
Tabulation provides other several embodiment below.
| Every row counts | Row-to-row distance | Outer tube diameter | Interior external diameter of pipe | Outside diameter of mandrel | Collapse threshold | |
| Example 2 | 2 | 30 | 30 | 28 | 27.5 | Qualified |
| Example 3 | 4 | 48 | 34 | 31 | 30.7 | Qualified |
| Example 4 | 6 | 60 | 40 | 36.5 | 36.2 | Qualified |
| Example 5 | 8 | 64 | 42 | 39 | 38.6 | Qualified |
| Example 6 | 10 | 70 | 45 | 42 | 41.5 | Qualified |
Claims (3)
1, a kind ofly pacify golden tubing string punching press assembly method, it is characterized in that towards point type,
(1) plug is inserted in the outer tube, and outer tube and plug are fixed on the mould, require diameter of mandrel less than outer tube internal diameter 0.5～1mm;
(2) use common punch press assigned position punching press deformation point radially on outer tube, each deformation point is a rectangular configuration, the long length of side 9～12mm of rectangle, the long 6～10mm of minor face, deformation point is two rows, the quantity of every row's deformation point is 2～10, every row's deformation point evenly distributes along the outer tube circumference, and two arrange the 30～70mm that is spaced apart of deformation points, after the punching press, should be along the distance between the inner projection of two deformation points on the same diameter less than the external diameter of inner sleeve, its difference range is: 0.05～0.55mm;
(3) mandrel that uses hard material is by force by the outer tube internal diameter after the punching press, and the external diameter of mandrel is greater than the distance between two deformation point the inner projections on the same diameter, and its difference is 0.1～0.3mm;
(4) inner sleeve directly is pressed in the outer tube with pneumatic top, and strict location, the size that is pressed into power is selected according to the regulation of different automobile types.
2, punching press assembly method according to claim 1, it is characterized in that, after the mandrel that uses hard material is by force by the outer tube internal diameter after the punching press, use the difference that drift, no-go gage detect on the same diameter distance and inner sleeve external diameter between two inner projections of deformation point, guarantee in claimed range.
3, punching press assembly method according to claim 1 and 2 is characterized in that, when being pressed into inner sleeve in the outer tube, the force value that is pressed into is monitored.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101224730A CN100341660C (en) | 2003-12-25 | 2003-12-25 | Method for punching and assembling safety column by punching distorted points |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101224730A CN100341660C (en) | 2003-12-25 | 2003-12-25 | Method for punching and assembling safety column by punching distorted points |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1634678A CN1634678A (en) | 2005-07-06 |
| CN100341660C true CN100341660C (en) | 2007-10-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101224730A Expired - Fee Related CN100341660C (en) | 2003-12-25 | 2003-12-25 | Method for punching and assembling safety column by punching distorted points |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100341660C (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2161449A6 (en) * | 1971-11-25 | 1973-07-06 | Tubauto | |
| JPH10181615A (en) * | 1998-02-09 | 1998-07-07 | Nippon Seiko Kk | Shock absorbing steering shaft and manufacture thereof |
| CN2289724Y (en) * | 1996-05-10 | 1998-09-02 | 沈阳矿山机器厂 | Contractible absorption power type vehicle steering tubular column assembly |
| WO2002038430A1 (en) * | 2000-11-09 | 2002-05-16 | Daimlerchrysler Ag | Column tube of a steering column of a motor vehicle and a method for producing the column tube |
| US6574850B1 (en) * | 1999-03-04 | 2003-06-10 | Nsk Ltd. | Method for manufacturing shock absorbing type steering shaft |
-
2003
- 2003-12-25 CN CNB2003101224730A patent/CN100341660C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2161449A6 (en) * | 1971-11-25 | 1973-07-06 | Tubauto | |
| CN2289724Y (en) * | 1996-05-10 | 1998-09-02 | 沈阳矿山机器厂 | Contractible absorption power type vehicle steering tubular column assembly |
| JPH10181615A (en) * | 1998-02-09 | 1998-07-07 | Nippon Seiko Kk | Shock absorbing steering shaft and manufacture thereof |
| US6574850B1 (en) * | 1999-03-04 | 2003-06-10 | Nsk Ltd. | Method for manufacturing shock absorbing type steering shaft |
| WO2002038430A1 (en) * | 2000-11-09 | 2002-05-16 | Daimlerchrysler Ag | Column tube of a steering column of a motor vehicle and a method for producing the column tube |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1634678A (en) | 2005-07-06 |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071010 Termination date: 20151225 |
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| EXPY | Termination of patent right or utility model |