CN102207379A

CN102207379A - Method for measuring geometrical shape and/or structure of part

Info

Publication number: CN102207379A
Application number: CN2011100554028A
Authority: CN
Inventors: H-J·施密特
Original assignee: Dr Ing HCF Porsche AG
Current assignee: Dr Ing HCF Porsche AG
Priority date: 2010-03-30
Filing date: 2011-03-07
Publication date: 2011-10-05
Anticipated expiration: 2031-03-07
Also published as: DE102010016215A1; CN102207379B

Abstract

The invention relates to a method for measuring geometrical shape and/or structure of a part. In the method, the part is fixed by a fixing device for measuring the recording device in a stress-free way. The measuring is analyzed for several times with different substrates.

Description

The method that is used for measurement component geometric configuration and/or structure

Technical field

The present invention relates to a kind of be used to the measure geometric configuration of parts and/or the method for structure.

Background technology

Be known that by practice, for parts that relatively hour have certain altitude in support base, because there are four annexations inevitably, so simple, deviation is arranged certainly according to the mapping method (Aufnahme-Lehre) of 3-2-1 principle.Because parts are similar to the rigidity of surrounding environment, so both flexibly reset under the situation of tightening with screw thread, therefore when measuring, a kind of rigidity tensioning finally reflects few authenticity as three point measurements of routine.

For example well-known is only under the tensioning state with higher relatively pretightning force, just a supporting frame of the passenger protection device on the vehicle might be positioned at all four screw threads and twist in the contact.When this supporting frame has relative higher rigidity, because the vehicle skeleton has elasticity, so the rigidity tensioning is only partly corresponding with the installation in vehicle.On the other hand, to freely measuring that supporting frame carries out, then the mapping meeting at reference point 4 places produces error on the z of cartesian coordinate system direction by means of the alignment on three reference points (RP 1, and RP 2, and RP 3).Because disadvantageous length ratio between the spacing of each screw thread point and this supporting frame height on the cartesian coordinate system x direction, after being assembled to supporting frame in the vehicle, this error causes on cartesian coordinate system x direction the extra displacement at a plurality of tie points place on top, and this influence for the right side is particularly evident.

Summary of the invention

The objective of the invention is to overcome the above shortcoming.

According to the present invention, this purpose is to be used to measure the geometric configuration of parts and/or a kind of method of structure realizes by of the present invention.The present invention has also comprised other favorable characteristics.

In the method for parts of this measurement (parts that especially refer to motor vehicles) geometric configuration and/or structure, these parts are to utilize the stationary installation of a survey record equipment to fix in stressless mode.Respectively with different substrates to measurement carry out repeatedly, especially twice analysis.

According to an embodiment based on method of the present invention, measurement data that measures and/or analysis result (promptly described analysis is carried out in measurement and obtain result) are used to optimize these parts at least in part and are encased in accuracy of fit on the vehicle load-carrying members.

In a kind of design proposal of the method according to this invention, for the contrast purpose, these parts be in the rigidity tensioning and/or with the screw thread tight condition under, these parts are compared measurement.

An enforcement variant according to based on method of the present invention in the measurement of comparison process, is additionally supported these parts by at least one supporter.This supporter itself is supported on a kind of stressed load-carrying members.

In the method, angular error for example can obtain by means of the tolerance information of at least one (be preferably all) tie point of this supporting frame and/or by means of the tolerance information of a tie point of this supporter.

According to a embodiment,, the torsional rigid of parts and vehicle skeleton is compared for the purpose of contrast based on method of the present invention.

Combine it, the objective of the invention is to realize that by following 1 scheme 2-6 is a preferred version of the present invention:

1. be used to measure the geometric configuration of parts and/or a kind of method of structure, in the method, these parts are fixed in stressless mode by the stationary installation of a survey record equipment, it is characterized in that, with different substrates measurement are repeatedly analyzed respectively.

2. as 1 described method, it is characterized in that the accuracy of fit when measurement data that obtains and/or analysis result are used to optimize these parts at least in part and are encased in the vehicle load-carrying members in measurement.

3. as 1 or 2 described methods, it is characterized in that the purpose for contrast is under rigidity tensioning and/or the screw thread tight condition at these parts, and these parts are compared measurement.

4. as one of 1 to 3 described method, it is characterized in that in this measurement of comparison, utilize at least one supporter that these parts are supported extraly, this supporter self is supported on the stressed load-carrying members.

5. as one of 1 to 4 described method, it is characterized in that in the method, angular error is to utilize the tolerance information of at least one of this supporting frame, preferred all tie points and/or utilize the tolerance information of a tie point of this supporter to obtain.

6. as one of 1 to 5 described method, it is characterized in that,, the torsional rigid of parts and vehicle skeleton is compared for the purpose of contrast.

Description of drawings

Below with reference to accompanying drawings one embodiment of the present of invention are described in detail.In the accompanying drawings:

Fig. 1 has shown a supporting frame that is fixed of survey record equipment and motor vehicle passenger protection equipment in the mode of skeleton view;

Fig. 2 shows the skeleton view of structure on other direction of Fig. 1;

Fig. 3 shows the enlarged drawing of first details of Fig. 1;

Fig. 4 shows the enlarged drawing of second details of Fig. 1;

The base plate that Fig. 5 shows a survey record equipment with and go up the skeleton view of a plurality of load-bearing pillars of settling;

Fig. 6 shows the skeleton view of base plate on other direction of Fig. 5;

Fig. 7 shows the structure of Fig. 1 and Fig. 2 at the skeleton view that installs additional after a kind of spike is arranged; And

Fig. 8 is the bottom view of this supporting frame, is painted with the boost line that is used to illustrate one aspect of the invention among the figure.

Specific embodiments

In Fig. 1 to Fig. 8, identical parts adopt identical Reference numeral all the time.

Fig. 1 shows a survey record equipment 1 and can be by a supporting frame that is fixed 2 that measure based on method of the present invention, motor vehicle passenger protection equipment (roll-over protective structure) with the form of skeleton view.Survey record equipment 1 comprises a smooth base plate 3, and being mounted with a pair of xsect on this base plate is the load-bearing

pillar

4,5 of rectangle.The geometrical axis of load-bearing

pillar

4,5 is set to respectively perpendicular to base plate 3.

Fig. 2 shows the skeleton view of structure on another direction of Fig. 1.

The enlarged drawing of first details of Fig. 1 has been shown among Fig. 3, and a RPS2 (the support diameter is 25mm, and has pin) is equipped with Reference numeral 6.(RPS is used as the abbreviation of term " reference point system (Referenzpunktsystem) " in this article.)

The enlarged drawing of second details of Fig. 1 has been shown among Fig. 4, and a RPS1 (the support diameter is 25mm, and has pin) is equipped with Reference numeral 7.A RPS3 (the support diameter is 25mm) is equipped with Reference numeral 12.RPS1 to RPS3 on the interface point of correspondence by screw-thread securing.

Fig. 5 with the form of skeleton view show base plate 3 with and go up a plurality of load-bearing pillars of settling.A RPS4 (the support diameter is 25mm, can move by a plurality of depressions in the base plate, so that roughly be positioned in the framework when torque measurement) is equipped with Reference numeral 8.

Fig. 6 shows the skeleton view of base plate on other direction of Fig. 5.5 support chips (standard component) all are equipped with Reference numeral 9.

Fig. 7 shows the structure of Fig. 1 and Fig. 2 with the form of skeleton view, and this structure has installed a left spike additional arranges 10 and right spike arrangements.These spikes S1, S2 are used to stablize this fixing.

During one first measurement, on RPS1 to RPS3, carry out screw-thread securing.Carry out a kind of second and measure, except to spike S1, S2 in addition the screw-thread securing this point, all the other are all the same with first measurement.Measure for making this structure can be used in first, the screw-thread securing of spike S1, S2 is demountable.RPS3 and RPS4 are interchangeable.

The side information district that drawing shown in Fig. 8 comprises the bottom view that has the leg-of-mutton supporting frame that is marked and is used to illustrate one aspect of the present invention.

The aspect that the present invention discussed is, is under stressless state this supporting frame to be measured on the one hand, is to carry out twice analysis with different substrates on the other hand.

By means of the present invention,, still obtained restriction by the tolerance that this supporting frame caused at a plurality of tie points place on top although there is tensioning in the vehicle.Like this, need not further to measure, and the analysis that only need add can realize check in batches.

Claims

1. be used to measure the geometric configuration of parts (2) and/or a kind of method of structure, in the method, these parts (2) are fixed in stressless mode by the stationary installation of a survey record equipment (1), it is characterized in that, with different substrates measurement are repeatedly analyzed respectively.

2. the method for claim 1 is characterized in that, the accuracy of fit when measurement data that obtains in measurement and/or analysis result are used to optimize these parts (2) at least in part and are encased in the vehicle load-carrying members.

3. method as claimed in claim 1 or 2 is characterized in that, the purpose for contrast is under rigidity tensioning and/or the screw thread tight condition at these parts (2), and these parts (2) are compared measurement.

4. method as claimed in claim 3 is characterized in that, in this measurement of comparison, (S1 S2) supports these parts (2), and this supporter self is supported on the stressed load-carrying members to utilize at least one supporter extraly.

5. method as claimed in claim 4 is characterized in that, in the method, angular error be utilize this supporting frame whole tie points tolerance information and/or utilize the tolerance information of a tie point of this supporter to obtain.

6. method as claimed in claim 1 or 2 is characterized in that, in the method, angular error is to utilize the tolerance information of at least one tie point of this supporting frame.

7. method as claimed in claim 4 is characterized in that, in the method, angular error be utilize this supporting frame at least one tie point tolerance information and/or utilize the tolerance information of a tie point of this supporter to obtain.

8. method as claimed in claim 1 or 2 is characterized in that, for the purpose of contrast, the torsional rigid of parts and vehicle skeleton is compared.

9. method as claimed in claim 4 is characterized in that, for the purpose of contrast, the torsional rigid of parts and vehicle skeleton is compared.

10. method as claimed in claim 7 is characterized in that, for the purpose of contrast, the torsional rigid of parts and vehicle skeleton is compared.