CN1830592A - Method for producing bent spring rails from an endless spring band - Google Patents

Method for producing bent spring rails from an endless spring band Download PDF

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Publication number
CN1830592A
CN1830592A CNA2006100547926A CN200610054792A CN1830592A CN 1830592 A CN1830592 A CN 1830592A CN A2006100547926 A CNA2006100547926 A CN A2006100547926A CN 200610054792 A CN200610054792 A CN 200610054792A CN 1830592 A CN1830592 A CN 1830592A
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CN
China
Prior art keywords
spring
accordance
flexing
power
bending
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.)
Granted
Application number
CNA2006100547926A
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Chinese (zh)
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CN100434204C (en
Inventor
奥利弗·伦曾
杰拉尔德·帕胡尔
奥利弗·布卢门施托克
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Valeo Systemes dEssuyage SAS
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Valeo Systemes dEssuyage SAS
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Publication of CN1830592A publication Critical patent/CN1830592A/en
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Publication of CN100434204C publication Critical patent/CN100434204C/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
    • B21D53/886—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards leaf springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38—Wiper blades
    • B60S2001/3812—Means of supporting or holding the squeegee or blade rubber
    • B60S2001/3817—Means of supporting or holding the squeegee or blade rubber chacterised by a backing strip to aid mounting of squeegee in support
    • B60S2001/382—Means of supporting or holding the squeegee or blade rubber chacterised by a backing strip to aid mounting of squeegee in support the backing strip being an essentially planar reinforcing strip, e.g. vertebra

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)

Abstract

The invention relates to a method for producing bent spring rails from an endless spring band. The method is characterised by the following steps: continuous bending of a section of spring band; cutting the bent section of spring band into a spring rail; discontinuous reverse bending to reduce the internal stresses of the bent, cut-to-length spring rail.

Description

Make the method for crooked spring by continuous spring band
The application is that denomination of invention is that " method of being made crooked spring by continuous spring band ", international filing date are that November 6 calendar year 2001, international application no are to be for PCT/EP01/12838, national applications number dividing an application of 01818603.3 application for a patent for invention.
Technical field
The present invention relates to a kind of method that is used for making crooked spring by continuous spring band.The invention still further relates to the bending apparatus that is used to implement described method.
Background technology
Such spring constitutes the supporting member especially for the so-called plane windshield wiper blade of automobile.The supporting member of the spring formula of one or more particularly two banded longitudinal extensions is guaranteed from the windshield wiper blade contact pressure of scraping the water arm in a distribution of waiting to scrape the best on the glass plate of water in such plane windshield wiper blade.For this reason, supporting member promptly when windshield wiper blade is not adjacent to glass plate, has definite curvature according to prebuckling at the state of stand under load not.Wherein spring part or spring have cross section constant or that change along the longitudinal direction.Therefore, the supporting member of such plane windshield wiper blade replaces expensive jacket structured, this structure have two that Wiper rubber is provided with, under loaded state not the spring of prebuckling not, for example known as it by DE 1505397A1.
The result shows that the manufacturing of the spring of definite bending is difficult in this case.Produce internal stress as itself in the debatching process of continuous spring band from roller in the spring material BENDING PROCESS and in the process steps of extending forward especially, this internal stress may influence spring band part that is in crooked state or the performance that drops into the spring of using later on unfriendly.Wherein because the load stress in this internal stress and the windshield wiper blade annex and the stack of operational stresses induced make it at a good pace reach the plastic deformation zone.Because offset procedure causes the permanent change of member how much, this may cause member function part or even forfeiture completely.
By DE 19816609 known a kind of be used for by continuous spring band manufacturing curved by the method for spring, wherein will continuous spring band at first via a plurality of supporting-points crooked and and then on the supporting-point edge of a back in contrast to the direction back-flexing again of first bending.Then, the spring band part of processing is like this downcut to obtain actual spring from continuous spring band.Because the internal stress in the crooked spring band material is eliminated in the continuous bending of continuous spring band and back-flexing, can not occur or avoid thus because offset procedure or even because the permanent variation of the spring that load stress or operational stresses induced produce and can be prolonged and reliable in function ground uses spring.
But the shortcoming of this known method is, the best of method parameter is harmonized, that is supporting-point is very big with the expending of adjustment of the adjustment of the form of roller or roller and particularly back-flexing roller.When only adjusting a crooked roller, must depend on the adjustment of this first back-flexing roller of adjusting, so that in continuous BENDING PROCESS, reach the satisfactory back-flexing of spring part.
Summary of the invention
Therefore the objective of the invention is to, a kind of method that is used for being made by continuous spring band crooked spring is provided, it eliminates the described shortcoming of prior art and simply mode and method are implemented it.
This purpose was reached by the method for the spring of continuous spring band manufacturing bending by a kind of being used for, and this method is feature with the following step:
Spring band part of-continuous bend;
-the spring band part fixed length of bending is cut into a spring;
-intermittently by spring being applied at least one back-flexing power, spring is carried out instead
To bending, so that eliminate the internal stress of the spring that crooked and fixed length be cut into.
Opposite with known systems, the method of prior art contains that the back-flexing process is incorporated into bending machine and by the content in the direct-connected general function scope of the BENDING PROCESS of its continuous spring band that constitutes and back-flexing process, according to the present invention be provided with one in BENDING PROCESS and back-flexing interprocedual the cut-out step on the function and space.By the spring band of the relevant prebuckling of customized cut-off after the continuous spring band part that produces by continuous spring band, can next with its irrelevant step in, promptly the BENDING PROCESS with continuous spring band has nothing to do, and carries out the back-flexing of spring intermittently.Special advantage of the present invention is, thus the BENDING PROCESS of on method and technology, carrying out continuously and the back-flexing process of intermittently carrying out be separately and can have nothing to do each other and optimization individually.But for this reason according to this method can use easy operating, independently and the control functional block of good management, for example software and cam.Because the direct stroke connection to BENDING PROCESS is unnecessary, this method can be used very neatly.Because so simple system also obtains very big economic interests in being configured in and producing by batch.
Feature according to method of the present invention also is its very changeability of high level.Back-flexing on the one hand can realize hand-manipulatedly and can realize by means of the device of the operation of motor-driven, pneumatic or hydraulic pressure on the other hand by means of a simple device.
According to method of the present invention, being cut into spring in the spring band part fixed length with bending provides later under the situation of heat treatment of the K cryogenic treatment form under the temperature that preferably is being lower than 200 ℃, makes material or each spring be subjected to static strain-aging.This be because inside diffusion of carbon atom can make the dislocation structure stabilisation, wherein the built-in edge dislocation and the plastic deformation that only just may continue under the yield stress that improves effectively.Therefore the action principle of K cryogenic treatment and do not lie in by temperature effect and eliminate internal stress.As it for example in the annealing that eliminates stress that utilizes about 580 ℃-650 ℃ temperature to carry out.Advantageously, K cryogenic treatment is owing to particularly compare temperature to be lower than 200 ℃ be low-cost and low energy consumption with the annealing that eliminates stress.In addition, when K cryogenic treatment, must consider can not reduce strength characteristics.
Advantageously, the stabilisation of the temperature protection of spring is separated with BENDING PROCESS, thereby can carry out the independent optimization of Low Temperature Heat Treatment.
According to method of the present invention, in the interrupted back-flexing of spring with provide under the situation of heat treatment of the K cryogenic treatment form under the temperature that preferably is being lower than 200 ℃, can reach the extra high qualitatively stabilisation of spring, wherein obtain above-mentioned advantage equally.
In a favourable form of implementation of the present invention, set, before applying back-flexing power, spring is pressed to a pressing surface by means of a pressure.
Particularly advantageous is that described pressure acts on the maximum warpage point of spring.Advantageously reach the highest moment of flexure at the warpage point of maximum thus, eliminate the high internal stress that the there exists whereby.
Showed already, when described pressure act on spring in also can advantageously eliminate the fixed length internal stress with spring bending that be cut in the heart the time.
According to the later application of spring, all can be favourable when described pressing surface constitutes when the plane or crooked.
According to the present invention, need not or be additional to the pressure of spring being pressed to pressing surface, it is contemplated that before applying back-flexing power spring is clamped.Getting rid of spring by means of such clamping may be to undesirable direction skew when applying power.Avoid forming additional undesirable internal stress whereby.
Particularly advantageous form of implementation of the present invention is set.In the heart spring is carried out clamping at the warpage point of maximum or in spring.
A particularly preferred in practice form of implementation of the inventive method is characterised in that, by means of back-flexing power particularly application point or the bite from the application point of back-flexing power to described pressure produce a linear to a considerable extent reverse bending moment.Reach at the strongest deformed region by means of such reverse bending moment and to apply the strongest back-flexing, eliminate the high internal stress in the strongest deformed region whereby.
Another favourable form of implementation of the present invention is characterised in that with a plurality of, preferred two back-flexing power that act on the difference are applied on the spring, and wherein back-flexing power preferably acts on two free ends of spring.Can advantageously reach thus a linear to a considerable extent favourable moment of flexure is introduced in the spring.Thereby the introducing of the symmetry particularly by a plurality of back-flexing power produces the back-flexing of a spring symmetry and favourable.
Another form of implementation of the present invention is characterised in that, with a plurality of back-flexing power simultaneously or be applied on the spring successively.
It is contemplated that according to the present invention with at least one back-flexing power once, preferred secondary to five in turn is applied on the spring.Can consider the reduction of the stress of expection when loading repeatedly and unloading in this case especially simultaneously, this stress indicates the beginning (Bauschinger (Bauschinger) effect) of permanent plastic deformation.
The mode that the control of at least one back-flexing power can advantageously be controlled by power control and/or displacement realizes.Under power control load condition, spring is loaded into always makes back-flexing power reach certain level.The loading of displacement control is characterised in that, is stopping the back-flexing process later on through a predetermined bending displacement.
In another favourable form of implementation of the present invention, the spring that is cut into fixed length of a plurality of parallel bendings that are set up in parallel of back-flexing simultaneously.Advantageously, can be only by means of a plurality of springs of motor-driven form of implementation back-flexing simultaneously.Reduced other the sum for the treatment of the back-flexing process implemented successively whereby significantly.
The regulation of the value of back-flexing and particularly back-flexing power and/or back-flexing displacement can be determined by experience according to the present invention.These values depend on that basically the moment of inertia, cross-sectional area, back-flexing are with the height x of front curve and the bending height y of the later requirement of back-flexing.The quality of back-flexing can also be determined with how much distinctive characterisitic families by material is distinctive except the value that experience is determined to be fit to.
Shown that about heat treatment it carries out causing particularly advantageous and very high qualitatively result under 140 ℃ temperature.
The heat treated duration should be below one hour and preferred about 30 minutes.At this moment determine the heat treated duration by experience, wherein when described value, obtain particularly advantageous and very high qualitatively spring.
A further formation of this method is characterised in that in heat treatment process, spring is unaffected aspect how much variations of its temperature decision.Must be noted that each spring neither should be in contact with one another and should not hinder owing to the element of induction system or aggregate-storing system and change for how much of its temperature decision, so that avoid producing additional load stress this moment.Guarantee whereby not hinder material static strain-aging and can be not from the infringement of outside.
It is also conceivable that continuously or intermittently according to the present invention and to heat-treat.Make spring for example on a conveyer belt, pass through a heating station under the continuous heat treated situation.Under the interrupted heat treated situation spring for example placed a heating station and after processing finishes, therefrom taking out.
It is contemplated that according to the present invention in addition, spring be coating and particularly have one deck lacquer coat and/or a plastic coating.Heat treatment temperature is lower than the recrystallization temperature of the plastic coating that exists or is lower than such temperature under a stable condition in this case.Promptly may produce the temperature of undesirable change of the lacquer coat of spring.
The duration of heat treatment temperature and processing is particularly determined by experience according to material, face coat and spring geometry and/or by obtaining in the fixed characterisitic family.
Low Temperature Heat Treatment can advantageously be sent into spring in the storage device later, and it comprises the conveying to next module units.For example windshield wiper blade or windshield wiper device are installed in next module units then.
Starting described purpose also reaches by the bending apparatus that is used to implement said method.
Description of drawings
From following description, learn other favourable form of implementation and details of the present invention, wherein describe and illustrate the present invention in more detail by means of the embodiment shown in the accompanying drawing.Wherein:
Fig. 1 is according to the flow chart of method of the present invention;
Each step of the back-flexing process of first form of implementation of Fig. 2 to 5 the inventive method; And
Each step of the back-flexing process of another form of implementation of Fig. 6 to 9 the inventive method.
The specific embodiment
Learn that by flow chart at first the spring band to the formation spring of continuous spring band partly carries out bending, cut off then according to Fig. 1.Carry out bending and cut-out continuously.In the next interrupted step of method, spring is carried out the internal stress of back-flexing with the spring eliminating crooked and fixed length and be cut into.After it, can in another interrupted step of method, carry out tempering and particularly carry out Low Temperature Heat Treatment spring in addition.Or after the back-flexing or after additional tempering, spring can be flowed to unshowned assembling process and be installed to a flat windshield wiper blade or corresponding windshield wiper device on.The stabilisation of spring also can be under the situation of the interrupted step of saving back-flexing be realized by the interrupted step of the tempering of Low Temperature Heat Treatment form separately.
Fig. 2 to 5 demonstrates the step of the back-flexing shown in Fig. 1.
The fixed length spring band part that be cut into and bending of spring 1 form is shown with side view among Fig. 2.Spring 1 has bending height x with respect to level later in bending.
For back-flexing, as shown in Figure 3, in the center spring 1 clamped and by means of two onesize back-flexing power F by means of a holder 3 1And F 2Back-flexing makes spring 1 be in the state on plane to a considerable extent.Improving back-flexing power F 1And F 2Under the situation, make the plan-position of the spring 1 shown in this Fig. 3 import the state that is bent upwards shown in Fig. 4.The back-flexing of the maximum of spring shown in Fig. 41.Back-flexing this moment power F 1And F 2The value that reaches can or be subjected to that displacement is controlled or stressed control.Back-flexing power F 1And F 2Absolute value basically by the moment of inertia, cross-sectional area, before the back-flexing process bending height x and form at the function of the later bending height y of back-flexing process.
Be in the spring after the back-flexing under the loaded state not shown in Fig. 5.Wherein can obviously find out the bending height x of the spring 1 of the height y of the spring 1 after the back-flexing before less than back-flexing.
Another back-flexing method shown in Fig. 6-9 is wherein pressed to spring 1 pressing surface 5 on a plane.As obviously being found out by Fig. 6-9, pressing surface 5 is designed to the plane.Can certainly imagine, can adopt crooked pressing surface and without the pressing surface 5 on plane.
Shown in Fig. 6 according to Fig. 2 the later spring 1 of BENDING PROCESS and customized cut-off process not stand under load ground with two free and bearing on pressing surface 5.The value of the bending height of spring 1 is x at this moment.
Fig. 7 illustrates the next step of method, wherein, and pressure FThe 3 warpage points that act on the maximum of spring 1 go up or affact spring 1 in press against fully on the pressing surface 5 in the heart and with spring 1.
In the next step of method, corresponding at two free ends of spring 1 as shown in Figure 8 with Fig. 4, apply the back-flexing power F that spring 1 is bent upwards 4And F 5Back-flexing power F 4And F 5Absolute value be equivalent to back-flexing power F 1And F 2Value, depend on the moment of inertia, cross-sectional area especially, before BENDING PROCESS spring 1 bending height and after the back-flexing process bending height of spring 1.
As being learnt by Fig. 9, the height y after the back-flexing process is less than the bending height x of back-flexing process front spring bar 1.
By means of two free-ended two the back-flexing power F that in each each embodiment shown in Figure 1, act on spring 1 1And F 2Or F 4And F 5, bite or pressure F from the application point of back-flexing power to spring 1 3The application point that presses against pressing surface 5 produces the moment of flexure of a favourable linearity.In the back-flexing process shown in Fig. 2-5 or the 6-9, should repeat secondary to five especially, so that obtain very high qualitatively and prolonged and spring reliable in function.This moment, each back-flexing of holding of spring 1 can simultaneously or in turn be finished.
In the specification, in the dependent claims and the whole feature shown in the accompanying drawing independent and arbitrarily mutually combination all can be main contents of the present invention.

Claims (24)

1. method that is used for being made by continuous spring band crooked spring (1) is characterized in that the following step:
Spring band part of-continuous bend;
-the spring band part fixed length of bending is cut into a spring (1);
-intermittently by spring (1) being applied at least one back-flexing power (F 1, F 2Or F 4, F 5), spring (1) is carried out back-flexing, to eliminate the internal stress of the spring (1) that crooked and fixed length be cut into.
2. in accordance with the method for claim 1, it is characterized in that, applying back-flexing power (F 1, F 2Or F 4, F 5) before, by means of a pressure (F 3) spring (1) is pressed against on the pressing surface (5).
3. in accordance with the method for claim 2, it is characterized in that pressure (F 3) act on the maximum warpage point of spring (1).
4. in accordance with the method for claim 2, it is characterized in that pressure (F 3) act on spring (1) in the heart.
5. in accordance with the method for claim 2, it is characterized in that pressing surface (5) is the plane or crooked.
6. in accordance with the method for claim 1, it is characterized in that, applying back-flexing power (F 4, F 5) former clamp springs bar (1).
7. in accordance with the method for claim 6, it is characterized in that, go up at the maximum warpage point of spring (1) spring (1) is carried out clamping (3).
8. in accordance with the method for claim 6, it is characterized in that, spring (1) is carried out clamping (3) at the center of spring (1).
9. in accordance with the method for claim 1, it is characterized in that, by back-flexing power (F 1, F 2Or F 4, F 5), from back-flexing power (F 1, F 2Or F 4, F 5) application point to pressure (F 3) application point or to the reverse bending moment of a substantial linear of clamping (3) point generation.
10. in accordance with the method for claim 1, it is characterized in that, a plurality of back-flexing power (F that act on the difference 1, F 2Or F 4, F 5) be applied on the spring (1) wherein back-flexing power (F 1, F 2Or F 4, F 5) act on two free-ended zones of spring (1).
11. in accordance with the method for claim 10, it is characterized in that, with a plurality of back-flexing power (F 1, F 2Or F 4, F 5) simultaneously or be applied to successively on the spring (1).
12. in accordance with the method for claim 1, it is characterized in that, with described at least one back-flexing power (F 1, F 2Or F 4, F 5) be applied on the spring (1) at least once.
13. in accordance with the method for claim 1, it is characterized in that, with described at least one back-flexing power (F 1, F 2Or F 4, F 5) secondary to five in turn is applied on the spring (1).
14. in accordance with the method for claim 1, it is characterized in that, spring (1) is applied described at least one back-flexing power (F by power control and/or displacement control mode 1, F 2Or F 4, F 5).
15. in accordance with the method for claim 1, it is characterized in that, simultaneously a plurality of parallel springs that are set up in parallel of back-flexing (1).
16. in accordance with the method for claim 1, it is characterized in that back-flexing power (F 1, F 2Or F 4, F 5) and/or the back-flexing displacement determine by experience.
17. in accordance with the method for claim 1, it is characterized in that spring (1) is lower than under 200 ℃ the temperature at one by K cryogenic treatment heat-treats after interrupted back-flexing.
18. in accordance with the method for claim 17, it is characterized in that heat treatment is carried out under an about temperature of 140 ℃.
19. in accordance with the method for claim 17, it is characterized in that the heat treated duration is below one hour.
20. in accordance with the method for claim 17, it is characterized in that about 30 minutes of heat treated duration.
21. in accordance with the method for claim 17, it is characterized in that, determine the heat treated duration by experience.
22. in accordance with the method for claim 17, it is characterized in that in heat treatment process, spring (1) is unaffected aspect how much variations of its temperature decision.
23. in accordance with the method for claim 17, it is characterized in that, heat-treat continuously or intermittently.
24., it is characterized in that spring (1) is a coating according to one of aforesaid right requirement described method.
CNB2006100547926A 2000-11-11 2001-11-06 Method for producing bent spring rails from an endless spring band Expired - Fee Related CN100434204C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10056054.7 2000-11-11
DE2000156054 DE10056054A1 (en) 2000-11-11 2000-11-11 Method for producing bent spring rails from endless spring band involves continuously bending section of spring band , cutting bent section and discontinuous reverse bending to reduce internal stress
DE10056055.5 2000-11-11

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CNB018186033A Division CN1254325C (en) 2000-11-11 2001-11-06 Method for producing bent spring rails from endless spring band

Publications (2)

Publication Number Publication Date
CN1830592A true CN1830592A (en) 2006-09-13
CN100434204C CN100434204C (en) 2008-11-19

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CNB2006100547926A Expired - Fee Related CN100434204C (en) 2000-11-11 2001-11-06 Method for producing bent spring rails from an endless spring band

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DE (1) DE10056054A1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3339908A (en) * 1965-04-20 1967-09-05 Rockwell Standard Co Tapered leaf springs
DE4035484C2 (en) * 1989-05-09 2001-10-18 Georg Burger Device for deforming rod-shaped components
FR2739333B1 (en) * 1995-09-29 1997-11-14 Valeo Systemes Dessuyage WINDSCREEN WIPER PROVIDED WITH A FLEXIBLE DEFLECTOR FIXED ON CLAWS FOR FIXING THE WIPING SQUEEGEE
BR9811197A (en) * 1997-08-15 2000-07-25 Trico Products Corp Process of working a metal strip segment, worked metal strip segment and apparatus for use in working a metal strip segment
DE19815529C1 (en) * 1998-04-07 1999-12-02 Bosch Gmbh Robert Method and device for producing curved spring band sections
DE19816609A1 (en) * 1998-04-15 1999-10-21 Bosch Gmbh Robert Process for manufacturing flat beam windshield wipers for vehicles with curved flat beams
CN1254325C (en) * 2000-11-11 2006-05-03 瓦莱奥清洗系统公司 Method for producing bent spring rails from endless spring band

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CN100434204C (en) 2008-11-19

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