CN1178143A - Load-bearing shaped part and method for manufacturing shaped parts - Google Patents
Load-bearing shaped part and method for manufacturing shaped parts Download PDFInfo
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- CN1178143A CN1178143A CN 97118656 CN97118656A CN1178143A CN 1178143 A CN1178143 A CN 1178143A CN 97118656 CN97118656 CN 97118656 CN 97118656 A CN97118656 A CN 97118656A CN 1178143 A CN1178143 A CN 1178143A
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- form parts
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- section bar
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Abstract
The present invention provides a method for manufacturing a shaped part, which comprises the following steps: Firstly, a profiled material of aluminum alloy is prepared. Then, a profiled piece of predetermined length is produced by cutting the profiled material to length. This profiled piece is then inserted into a press machine. Finally, the profiled piece is pressed into the desired shape in the press machine. Further, a carrier shaped part is provided, which consists of cold-worked aluminum alloy.
Description
The present invention relates to make the method for form parts.The invention still further relates to the form parts of this carrying.
The form parts of carrying can be used in various engineerings field.The various application of protecting (protection) system aspects at the occupant safety bundle of vehicle for example below will be described.But should spell out, the present invention can be used in all mechanical engineering fields.
Can use form parts of the present invention for example is snap close, and this snap close can be used for take-up is connected in the take-up spool of bandage-winder.This snap close is the part of connector, and this connector makes bandage-winder and take-up separate under normal condition, makes the take-up spool of bandage-winder freely to rotate.If but take-up is by for example configuration sensor-triggered onboard, then take-up must be connected in take-up spool in the shortest time, so that take-up spool is along the coiling direction rotation of band, the triggering that just produces sensor when the deceleration of vehicle surpasses the threshold value of stipulating.Because require very short response time and the torque that will transmit, this snap close will be subjected to heavily stressed effect.
For meeting the requirements of intensity reliably, snap close makes sintered part usually.Like this except that having essential intensity, the shape degree of accuracy that can also obtain to require.Perhaps also can adopt steel to make blank and make this form parts with machined.Manufacturing cost is all very high in each case.In addition, the cold stamping of well-known steel.Its shortcoming is the energy input height of processing.In the form parts of doing with steel, its weight quite greatly also is a shortcoming.
The invention provides a kind of method of making form parts, the cost of this method is lower than prior art.Method of the present invention may further comprise the steps: the section bar of at first making aluminium; Then section bar is cut into certain-length, makes the type spare of predetermined length; Type spare is inserted in the pressing mold; At last the type spare in the pressing mold is pressed into the shape of requirement.The method has been utilized the beyond thought result of study of expert in this technical field, although promptly the intensity of the form parts aluminium alloy of doing with aluminium alloy is in fact not enough, can replace the form parts of steel fully.In pressing mold, during mold pressing type spare, be actually this material of cold working, so the strength of materials increases by 60%.Therefore cold worked in this way form parts has the intensity that enough is used for predetermined purpose; The material that dependence will be compared, its intensity is suitable with the intensity of the form parts of doing with steel.Therefore alleviated weight significantly.In addition, can make of moulding mixture because type spare promptly will make the blank of form parts, and this moulding mixture can provide in a continuous manner, so a kind of particularly advantageous manufacture method can be provided.The advantageous effect of this manufacture method is, type spare can be molded into the shape that needs in conventional press (punch press), promptly compare with for example sintering equipment, and this molding device is the quite low simple device of a kind of price.
According to a preferred embodiment of the present invention, section bar has a cross section, and this cross section is suitable for the production form parts.This embodiment of the present invention is based on such starting point: if section bar is made to the expense that has the cross section that is suitable for the form parts structure as far as possible then can further reduce the form parts manufacturing.Even in fact there is the aluminium section bar of various shape of cross section can be for selecting for use now, but existing cross section also be difficult to satisfy its cross section corresponding to form parts construction profile line and may add that also regulation crosses this requirement of surplus.But make this section bar in order to make type spare separately, compare with the expense of conventional autofrettage, its expense is inappreciable, and the blank of the form parts of requirement is processed in the available mold pressing of this type spare.In other words, adopt extrusion for example to produce the section bar that is fit to configuration continuously with low cost and just can obtain many type spares that are connected to each other, these type spares only need be separated from each other it.With particularly for example sintering process compare, clearly simplified manufacture method, in sintering process, to make form parts singly separately.
The cross section of section bar is preferably corresponding to waiting that the projection of making form parts added surplus.This embodiment of the present invention is based on such starting point: can be about to form parts to be made in simple especially mode and be projected in the optimum cross section of determining section bar on the plane.And then will cross surplus and be added on the zone that obtains in this way, can obtain the cross section of section bar thus.This is crossed surplus and guarantees when type spare is molded into the shape of requirement, the height moulding can take place, thereby meet the requirements of material cold working.This crosses surplus usually less than about 25%, preferably between 10%～20%.
If form parts has central axis, then preferably from form parts at a cross section that goes out to send to determine section bar perpendicular to the projection on the plane of this central axis.In this kind projection pattern, preferably be parallel to form parts at one and extend the cross section that projection on the plane on plane obtains section bar according to form parts.In this kind projection pattern, the cross section of section bar is particularly suitable for making flat substantially form parts.
According to the present invention, first soft annealing section bar, and then be cut into certain-length.Perhaps also can change soft annealing type spare into.Can remove the cold-working (cold-workability) that when making, has produced once more by soft annealing, thereby the aluminium alloy type spare of easy processing is provided for example with extrusion making section bar.
According to the present invention, for example after mold pressing, can adopt thermmohardening or stress hardening method to make the form parts sclerosis.Can further increase the intensity of the form parts of mold pressing like this.
The invention still further relates to a kind of form parts of carrying.According to the present invention, this form parts constitutes with cold-working aluminium.The advantage that this form parts had is that it can promptly adopt the method for mold pressing type spare to make in simple especially mode.The professional and technical personnel does not also study this form parts so far, because the intensity of steel is quite high, this material has good processability again, and has obtained satisfied effect, and its intensity of aluminium alloy is quite low, and price is expensive again, does not show any advantage.Yet the present invention is based on the adopting process the i.e. method of mold pressing type spare in pressing mold of quite simple method, can increase the intensity of resulting form parts, be increased to the form parts that can replace steel commonly used so far with the form parts that the cold-working aluminium alloy is done.
This form parts of the present invention can specifically be the load bearing component of the occupant restraint system of vehicle.
Because in the by bus personnel's of vehicle bundle protecting system, require parts to have pin-point accuracy and high security, in case have an accident, in addition, also require parts to have high intensity and owing to use amount requires the low manufacture method of cost greatly, so the invention provides parts with these special benefits.
Other favourable aspect of the present invention as can be seen from dependent claims.
Below with reference to various embodiment the present invention is described, these embodiment are illustrated in the accompanying drawing of following discloses:
Fig. 1 illustrates the longitdinal cross-section diagram that can use type spare in the methods of the invention;
Fig. 2～5 schematically illustrate four procedure of processings that adopt the inventive method to make form parts;
Fig. 6 illustrates the perspective view of the form parts of making of the method that is shown in Fig. 2～5;
Fig. 7 illustrates the top view of the form parts made from the inventive method;
Fig. 8 illustrates along the sectional view of the form parts of the VIII-VIII line intercepting of Fig. 7;
Fig. 8 a illustrates the section bar perspective view that is used for form parts shown in shop drawings 7 and 8;
Fig. 9 illustrates the side view of the another kind of form parts made from the inventive method;
Figure 10 illustrates the top view of form parts shown in Figure 9, and wherein part is the sectional view along the X-X line intercepting of Fig. 9;
Figure 11 illustrates the perspective view of another form parts made from the inventive method;
Figure 12 illustrates the top view of Figure 11 form parts;
Figure 13 is the perspective view that is used to make the section bar of form parts shown in Figure 12.
Utilize Fig. 1～6, can illustrative method of the present invention.The aluminium alloy extrusions (not shown) cut into chunks just can obtain the type spare shown in Fig. 1 10.Section bar can be on upply spool for example.According to the respective length of the true shaped element of volume of waiting to make form parts, the volume that makes the volume of type spare equal form parts at least adds the volume that the type spare that causes owing to material compaction reduces in process, but this volume that reduces is very little.Section bar is that intensity rank is the aluminium alloy of F17～F50.Preferably section bar or soft annealing before cutting into chunks perhaps make type spare 10 soft annealings of being cut into, and then further processing, make the cold-working that can eliminate the aluminium alloy that produces when making section bar to make material have good processing characteristics.
Then type spare 10 is inserted press (punch press) 14, this press is made of mould 16 and drift.In addition, can be provided with respect to the mobilizable pushing piece 21 of this mould in the inside of mould 16.Fig. 2 illustrates how type spare 10 is inserted mould 16.Then drift 18 is inserted mould 16, be engaged in wherein up to plunger protuberance 22, the overall diameter of this protuberance is slightly smaller than the interior diameter of blank 10.
As shown in Figure 3, plus-pressure makes drift 18 more go deep into mould 16, force type spare 10 to enter mould 16 on the one hand thus, be pressed against on the pushing piece 21, utilize the punching press tapered portion 24 that is right after plunger protuberance 22 to make the enlarging a little of end to axial of type spare on the other hand again up to it.
Can see among Fig. 4 that drift 18 is pressed into mould 16 fully.Thus type spare 10 is pressed into the shape of requirement, thereby produces form parts 12.
Fig. 5 illustrates and utilizes pushing piece 21 with form parts 12 launch modes 16.If desired the release ring 28 that is shown in Fig. 5 can also be set in mould 16, so that rolled-up stock 12 and drift 18 are separated.
When drift 18 and mould 16 punching presses, the just deformation of type spare 10 of inserting press 14, deformation is so big, so that the cold-working of generating material.This cold-working can cause intensity to increase to up to 60%.If necessary, the material of thermmohardening for example or stress hardening method sclerosis form parts 12 can also be after mold pressing, adopted, the intensity of resulting form parts can be further increased like this.If by selecting suitable Cutting Length to make the volume of type spare equal the volume of the form parts that will obtain, then directly mold pressing goes out form parts and does not need to carry out subsequently processing.If the volume of selection type spare is a bit larger tham the volume of form parts to be made, then the result forms a blank, and this blank is compared with form parts to be made after mold pressing has excessive material.This excessive material or make the local extension that can cut perhaps makes the sheet that can remove and crosses surplus.
Fig. 7 and 8 illustrates form parts of the present invention, and these parts utilize method production of the present invention.Form parts 12 in this example is gears, and it has the opening along central axis C, and this opening makes shoulder hole.For making suitable section bar, at first resolve form parts to be made, determine to constitute the axis of form parts central axis C.With form parts be projected in one perpendicular on the plane of this axis C for example on the plane of figure.Produce the outer peripheral lines 70 determined by the gear exterior contour subsequently and by the given interior contour 72 of the shoulder hole part with minimum diameter.For the actual cross sections of the section bar that obtains to use, be added on two zones between the contour in the mistake surplus between about 10%～20% amounting to.Therefore, use and to be about that tubular (see the start material of Fig. 8 section bar 20 a) as form parts shown in shop drawings 7 and 8, the interior diameter of this pipe is determined by the minimum diameter of gear hole, and its exterior contour has had corresponding to the tooth of waiting to make gear.But the difference between the size of the size of section bar and the form parts that processes is above-mentioned mistake surplus.By the cutting moulding mixture become type spare that section forms the length that must have definite according to the volume of last form parts 12 as mentioned above, the type spare that will so form is placed on and is processed into form parts 12 in the press then, and this press is suitable for stamping out the configuration of waiting to make form parts.Cross on the direction of axis C that surplus can also only be added in form parts.
Fig. 9 and 10 illustrates the different form parts 12 of producing with the inventive method.This form parts 12 is snap closes, and this snap close is used for for example take-up is connected in bandage-winder.This snap close can transmit high rotating torque to about 100Nm, the about 20mm of its height H, and the about 7mm of its thickness d.In addition, in this form parts to be made 12, by the form parts projection in one plane being obtained to be used as the cross section of the section bar of the material that starts.Because the form parts 12 in this example is flat substantially, extends on the plane on planes and promptly carry out projection on the accompanying drawing face in this example so be parallel to form parts 12 at one.Therefore the outline of transverse section of section material is corresponding to the contour 90 of form parts 12.Also added surplus at this.Therefore the section bar that obtains like this is equivalent to be roughly meniscate bar, and the tooth that form parts 12 has is formed on the inboard.Mold pressing becomes certain-length and the type spare that forms through suitable this section bar of cutting then.Form supporting protuberance 92 in mold pressing with during making material deformation, this protuberance extends perpendicular to the perspective plane.
Figure 11 and 12 illustrates the another kind of form parts of making by the inventive method 12, for example is being used in the rotating piston that rotates in the take-up shown in this example.The cross section of the section bar that uses is determined by being projected on the plane perpendicular to central axis C in the mode that is similar to form parts shown in Fig. 7 and 8.Produce outer peripheral lines 100 and interior contour 102 in this way.Therefore will with section bar 20 are bars (rod) that have triangle outline substantially and the endoporus (seeing Figure 13) of tooth is arranged.Mold pressing is cut into resulting type spare behind the certain-length with this section bar then, to form form parts 12.During carrying out deformation, can form recess 104 (seeing Figure 11).
If form parts to be made 12 has following grooving, then can in this press, use slide block in addition, extrude these slot portion down by this slide-action die.
Claims (27)
1. method of making form parts (12) may further comprise the steps:
Make aluminium alloy extrusions (20);
By section bar (20) is cut into the type spare that certain-length forms predetermined length;
Type spare (10) is inserted in the press (14);
In press (14), type spare (10) is molded into the shape of requirement.
2. the method for claim 1 is characterized in that, section bar (20) has the cross section that is suitable for forming form parts to be made (12).
3. method as claimed in claim 2 is characterized in that, by determining axis (C) and being positioned at the configuration of resolving the form parts (12) of completion perpendicular to the outline of the form parts on this plane (12).
4. method as claimed in claim 3 is characterized in that, the cross section of section bar (20) added the surplus part corresponding to the projection of form parts to be made (12).
5. method as claimed in claim 4 is characterized in that, the length that is cut into one section type spare (10) depends on form parts (12), the axial length of configuration.
6. method as claimed in claim 4 is characterized in that, the difference of the outline of the shape of cross section of section bar (20) and form parts (12) was surplus.
7. method as claimed in claim 4 is characterized in that, the difference of the axial length of the axial length of type spare (10) and form parts (12) was surplus.
8. method as claimed in claim 4 is characterized in that, crosses surplus less than about 25%.
9. method as claimed in claim 8 is characterized in that, crosses surplus between about 10%～20%.
10. method as claimed in claim 3 is characterized in that, axis is the central axis (C) of form parts (12), from form parts (12) at the cross section that can obtain section bar (20) perpendicular to the projection on the plane of central axis (C).
11. method as claimed in claim 3 is characterized in that, form parts (12) has flat substantially configuration; Axis (C) is perpendicular to the extension plane of form parts (12); From form parts (12) at the cross section that can obtain section bar (20) perpendicular to the projection on the plane of axis.
12. method as claimed in claim 2 is characterized in that, makes section bar (20), makes it have the cross section that is suitable for form parts to be made (12).
13. method as claimed in claim 12 is characterized in that, the shape of cross section of section bar (20) is suitable for forming the trim line of form parts (12), and this trim line obtains by sciagraphy.
14. the method for claim 1 is characterized in that, the intensity rank of section bar (20) is F17～F50.
15. the method for claim 1 is characterized in that, section bar (20) carried out soft annealing before cutting into chunks.
16. the method for claim 1 is characterized in that, type spare (10) is by soft annealing.
17. the method for claim 1 is characterized in that, form parts (12) is hardened after mold pressing.
18. method as claimed in claim 17 is characterized in that, form parts (12) is carried out thermmohardening handle.
19. method as claimed in claim 17 is characterized in that, form parts (12) is carried out stress hardening handle.
20. the method for claim 1 is characterized in that, form parts (20) has the excess enthalpy material after mold pressing.
21. method as claimed in claim 20 is characterized in that, the excess enthalpy material exists as at least one local protuberance, and this protuberance cuts after mold pressing.
22. method as claimed in claim 20 is characterized in that, the excess enthalpy material is crossed excess as at least one sheet shape and is existed, and this is crossed excess and removes after mold pressing.
23. the method for claim 1 is characterized in that, form parts (12) is the load bearing component of automotive occupant bundle protecting system.
24. the form parts of a carrying is characterized in that, it is made of cold worked aluminium.
25. form parts as claimed in claim 24 is characterized in that, form parts is the connection catcher of take-up.
26. form parts as claimed in claim 24 is characterized in that, form parts is the rotating piston of take-up.
27. form parts as claimed in claim 24 is characterized in that, form parts is the snap close piece of bandage-winder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97118656 CN1178143A (en) | 1996-09-19 | 1997-09-18 | Load-bearing shaped part and method for manufacturing shaped parts |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19638441.9 | 1996-09-19 | ||
| EP97106918.2 | 1997-04-25 | ||
| CN 97118656 CN1178143A (en) | 1996-09-19 | 1997-09-18 | Load-bearing shaped part and method for manufacturing shaped parts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1178143A true CN1178143A (en) | 1998-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97118656 Pending CN1178143A (en) | 1996-09-19 | 1997-09-18 | Load-bearing shaped part and method for manufacturing shaped parts |
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| Country | Link |
|---|---|
| CN (1) | CN1178143A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102152253A (en) * | 2011-04-21 | 2011-08-17 | 泰德兴精密电子（昆山）有限公司 | Special-shaped workpiece structure favorable to CNC (computer numerical control) processing |
| CN105188978A (en) * | 2013-02-08 | 2015-12-23 | 杰富意钢铁株式会社 | Press-forming analysis method |
| CN110340238A (en) * | 2018-04-03 | 2019-10-18 | 苏州德锌达自动化科技有限公司 | A kind of safety belt bulb necking machine |
| CN112191752A (en) * | 2020-09-10 | 2021-01-08 | 李文华 | Pre-flaring device for low-wall-thickness steel pipe |
-
1997
- 1997-09-18 CN CN 97118656 patent/CN1178143A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102152253A (en) * | 2011-04-21 | 2011-08-17 | 泰德兴精密电子（昆山）有限公司 | Special-shaped workpiece structure favorable to CNC (computer numerical control) processing |
| CN105188978A (en) * | 2013-02-08 | 2015-12-23 | 杰富意钢铁株式会社 | Press-forming analysis method |
| CN105188978B (en) * | 2013-02-08 | 2017-03-29 | 杰富意钢铁株式会社 | Punch forming analytic method |
| US10161892B2 (en) | 2013-02-08 | 2018-12-25 | Jfe Steel Corporation | Method of analyzing press forming |
| CN110340238A (en) * | 2018-04-03 | 2019-10-18 | 苏州德锌达自动化科技有限公司 | A kind of safety belt bulb necking machine |
| CN112191752A (en) * | 2020-09-10 | 2021-01-08 | 李文华 | Pre-flaring device for low-wall-thickness steel pipe |
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