JPH0725371A - Adjustment support device for body assembling jig - Google Patents

Abstract

PURPOSE:To provide an adjustment support device for a body assembling jig, which facilitates an analysis of factors affecting the accuracy of a body, and can make the adjusting works of the assembling jig more efficient and more effective for aiming at the improvement of the accuracy of the body. CONSTITUTION:The device is equipped with a measurement equipment 1 measuring the specified areas of a work and an assembling jig, a detection switch 2 detecting the clamping condition of the work, a central processing section 5 analytically processing the respective data of the measurement equipment 1 and the detection switch 2 in a lump, a data base 6 storing the result of processing by the central processing section 5, and with a terminal means 7 indicating the result of processing by the central processing section 5 over a screen.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body assembly jig adjustment support device, and more particularly to measuring the behavior of a work or an assembly jig with the passage of time and centrally managing and displaying their correlation. The present invention relates to the one that supports the analysis of factors that affect the vehicle body accuracy.

[0002]

2. Description of the Related Art Generally, when assembling a vehicle body, it is necessary to position and weld each panel component with high precision, and an assembly jig (hereinafter, also simply referred to as a jig) is used for this purpose. . With the recent automation of the body assembly process, the position accuracy is required to be several times higher than that of the manual work, and the accuracy of the jig itself is strongly required. Jig adjustment is a very important factor.

Such adjustment of the vehicle body assembly jig is mainly performed in the stage of various kinds of small-quantity production of a prototype vehicle or the like, and conventionally, the behavior of a work such as a panel or a sub-assembly as an intermediate part and a jig is measured by a dial gauge, for example. However, the adjustment work for ensuring the positional accuracy is performed on the jig based on this result.

More specifically, according to the flowchart of the assembly jig adjusting step shown in FIG. 5, first, a jig corresponding to each work is assembled (S1), and then the measuring gauge is attached to the jig base. (S2), the accuracy of the jig is measured, and thus the jig is adjusted to the required accuracy (S3). Then, the work is positioned according to the jig (S4),
Adjust the jig so that the hit condition is appropriate (S
5). Then, the work is fixed with a clamp, and the works are joined by spot welding, for example, to form an upper assembly (S6), and the accuracy is measured by measuring the assembly with a gauge or a three-dimensional measuring device. The quality of is checked (S7). Then, when the quality is evaluated as NG (S8), the process returns to step 3 to check the accuracy of the jig and the accuracy of the work centering on the defective portion, and carry out the jig adjustment work for improving the accuracy. . When the vehicle body (main body) is assembled by repeating the above steps, a large layout machine is often used as a three-dimensional measuring device for measuring the vehicle body in step 7.

[0005]

However, in such a conventional body assembly jig adjusting method, the assembly obtained by joining the workpieces is measured and the result is fed back to the jig adjustment. Alternatively, since it is a method to check the accuracy of the jig by measuring it without load, what part of the jig is defective in the analysis of the inaccuracy part, what is the effect of the clamp order, and the work It is not possible to quantitatively grasp the behavior of the work or jig in the vehicle body assembly process, such as whether the jig is deformed due to overload, and it is difficult to see the correlation of the behavior of each part. It was extremely difficult to adjust the equipment efficiently and effectively.

The present invention has been made in view of the above problems of the prior art, and provides a vehicle body that assists the adjustment work of the assembly jig for improving the vehicle body precision in an efficient and effective manner. An object is to provide an assembly jig adjustment support device.

[0007]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides position measuring means for measuring the position of a predetermined portion of a work and an assembly jig, and clamp state detecting means for detecting the clamp state of the work. A statistical processing means for collectively statistically processing each data of the position measuring means and the clamp state detecting means, a storage means for storing a result of the statistical processing means, and a display means for displaying a result of the statistical processing means. And having.

[0008]

In the present invention thus constructed, the position measuring means measures the positions of the predetermined parts of the work and the assembly jig, and the clamp state detecting means detects the clamp state of the work. The statistical processing means collectively statistically processes each data of these position measuring means and clamp state detecting means,
The temporal changes in the behavior of the work and the assembly jig and their correlations are calculated. The storage means stores and manages the result in a unified manner, and the display means displays the result along the time axis.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a block diagram showing the configuration of a vehicle body assembly jig adjustment support device according to an embodiment of the present invention, FIG. 2 is a flowchart of an assembly jig adjustment process using the device of FIG. 1, and FIG. 3 is an example of a monitor display. FIG. 4 is a configuration diagram showing an application example of the apparatus of FIG.

The vehicle body assembly jig adjustment support device shown in FIG.
Measuring devices 1 (a, b, c, ...) As position measuring means for measuring the positions of workpieces such as panels and subassemblies and arbitrary predetermined parts of the assembly jig, and the clamped state of the workpiece on the jig is detected. Detection switches 2 (a, b, c, ...) As clamp state detecting means, a first input processing section 3 for inputting measurement data of each measuring instrument 1, and a detection signal of each detection switch 2 for input processing A second input processing unit 4, a central processing unit 5 as a statistical processing unit for collectively statistically processing the data input processed by the first and second input processing units 3 and 4, and the first and second A database 6 as a storage unit for storing data read from the input processing units 3 and 4 and data of a processing result of the central processing unit 5, and a terminal as a display unit for displaying an operation of an operator and a processing result of the central processing unit 5. With device 7 Are al configuration. In the present embodiment, the first input processing unit 3, the second input processing unit 4, the central processing unit 5 and the database 6 constitute one controller 8.

The measuring device 1 is a device that can measure the position of a predetermined portion of a work or a jig with the passage of time, and uses a non-contact type sensor such as an eddy current detection type gap sensor. In the present embodiment, a plurality of measuring devices 1 corresponding to the number of measurement portions are used to measure arbitrary plural desired portions of the work and the jig. These measuring instruments 1
Is configured for easy installation on existing assembly equipment and jigs. Further, the detection switch 2 is installed for each clamp provided on the jig.

The central processing unit 5 is composed of a computer and statistically processes the data from the first input processing unit 3 and the second input processing unit 4 collectively. Specifically, the position data of a plurality of predetermined parts of a workpiece or jig measured by each measuring instrument 1 with the passage of time, and the clamp of the workpiece detected by each detection switch 2 with the passage of time as well. The state data and the state data are collectively statistically processed to calculate the temporal transition of the behavior of a predetermined part of the work and the jig and their correlation. This situation is stored in the database 6 and simultaneously displayed on the screen of the external terminal device 7 in real time. An example of the screen displayed on the terminal device 7 is shown in FIG.
Through these, the processing result of the central processing unit 5 is centrally managed and displayed.

In the present embodiment, the terminal device 7 analyzes the degree of correlation between the deviation amount at the time of assembling the vehicle body and the vehicle body precision at each point of the work based on the data in addition to the real-time display function. It is equipped with a correlation statistical processing function and an influence degree evaluation function that analyzes the degree of influence on the displacement of each part of the entire vehicle body by each clamp. With the correlation statistical processing function, the correlation between the variation and deviation amount of each point that occurred during vehicle body assembly and the inaccuracy of the vehicle body is analyzed.
When a failure occurs, the cause can be easily investigated. For example, when the opening rear portion of the front pillar has a poor precision, there is a correlation that the portion is largely dispersed and unstable when the main body is assembled. In addition, the behavior of the work such as panel parts in the jig is generally complicated, and the accuracy of the entire vehicle body may be greatly affected by just clamping at one place. Since it is possible to grasp all of which part moved and how much when each clamp is performed, it is possible to easily improve the accuracy failure when it occurs. For example, if you grasp the phenomenon that the locate hole in the upper part of the front pillar shifts largely when the rear part of the body side roof is clamped in the main body assembly process, the cause of the poor accuracy of the upper part of the front pillar is the cause of the rear part of the body side roof. It seems that there is a problem with the jig shape of the part.

As a result, in each step of joining the works on the jig, the behavior of the works and the jig can be quantitatively grasped along the time axis together with the correlation thereof, and the assembly after assembly can be performed. It becomes possible to easily identify the factors that affect the accuracy (quality). As a result, the adjustment work of the assembly jig for improving the vehicle body accuracy can be efficiently and effectively performed. The measuring device 1 may be wireless and the measurement data may be transmitted wirelessly. In this case, the controller 8 is provided with a transmission / reception unit.

Next, the procedure of the assembly jig adjusting process using the present apparatus thus constructed is as shown in the flowchart of FIG.

First, after a jig corresponding to each work is assembled (S10), the gauge is attached to the base of the jig, while the measuring device 1 is installed at an appropriate position such as a post of the jig and the work or The jig is set so that the behavior of the portion to be measured can be measured, and the detection switch 2 is attached to a predetermined clamp of the jig so that the clamped state of the workpiece can be detected (S11). Then, the accuracy of the jig is measured with a gauge, and the jig is adjusted to the required accuracy (S12). Then, the work is positioned according to the jig and clamped in a predetermined order (S1
3). During this time, the behavior of the work and the jig is measured by this device over time (S14). That is, measuring instrument 1
The change of the position of the work and the predetermined part of the jig is measured, and the clamp state of the work is detected by the detection switch 2, and these data are centrally processed through the first and second input processing units 3 and 4, respectively. It is taken into the unit 5 and statistical processing is performed collectively. This result is displayed on the screen of the terminal device 7 in real time (see FIG. 3). Then, if necessary based on this result, the jig is adjusted so that the work hitting condition is appropriate (S15). After that, the works are joined together by spot welding, for example, to form an upper assembly (S16). Then, even during this period, the behavior of the work or the jig is measured by this device with the passage of time (S17). Then, the assembled assembly is measured with a gauge or a three-dimensional measuring device to measure the accuracy (S18), and the accuracy is evaluated (S1).
9) If it is NG, return to step 12, check the accuracy of the jig and the accuracy of the work centering on the defective part with reference to the result of step 17, and perform the jig adjustment work to improve the accuracy. carry out.

FIG. 4 shows a case where this apparatus is connected to an automatic panel measurement system as an application example. In panel measurement, a panel component P such as a door is set in a fixture for measurement. In an automatic panel measurement system that automatically performs panel measurement, accuracy of setting the panel P in the fixture is important. Become. In general,
Although it is fixed to a fixture that covers a shape such as a panel gauge, the panel P is easily deformed, so the accuracy varies greatly depending on the clamping method. Therefore, the measuring device 1 constituting the present device is installed at a position where a predetermined part of the panel P can be measured, the detection switch 2 is built in each clamp device 10, and the controller 8 is connected to the panel measurement controller 9, It is configured to detect whether or not the position of a predetermined portion of the panel P is largely displaced when the panel P is clamped, and output the result (OK / NG determination) to the panel measurement controller 9. For example, when the panel P is clamped and a deviation exceeding the allowable value occurs, a signal of measurement preparation NG is output to the panel measurement controller 9.

As an application example of this device, other than this,
Connected to the NC controller of the production line (for example, NC locator controller) or the controller of the vehicle body measurement system on the production line, for example, the gauge shape of the jig when starting up the prototype vehicle at the time of model change In order to perform jig adjustments efficiently by analyzing the influence of the position, position, clamp order, etc. on the vehicle body accuracy, the measurement data of this device can be fed back, or the location of the inaccuracy can be input from the vehicle body measurement data. Specify the area where analysis is focused on.

As described above, according to the present embodiment, the position data of the predetermined portion of the work and the jig and the clamp state of the work are detected, and these data are statistically processed to be centrally managed and displayed. , It becomes possible to quantitatively grasp the behavior of the work and the jig together with their correlation in the form of temporal transition, and the jig (clamping that affects the accuracy (quality) of the assembly (or vehicle body) after assembly) It is possible to easily specify (including) and workpieces. As a result, the adjustment work of the assembly jig for improving the vehicle body accuracy can be efficiently and effectively performed.

Further, when the present embodiment is applied to another system, by inputting the accuracy of the assembled vehicle body, it is possible to quickly identify a defective portion at the assembly stage, and the correlation at the assembly stage can be determined. Can be made into a database. In addition, the NC position of the analyzed jig is corrected.
The jig adjustment can be automated by feeding back to the vehicle body measuring device.

[0021]

As described above, according to the present invention, the behaviors of the work and the assembly jig are measured and the correlation between them is centrally managed and displayed. It becomes possible to easily identify factors such as tools and works, and it becomes possible to efficiently and effectively perform the adjustment work of the assembly jig for improving the accuracy of the vehicle body.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a vehicle body assembly jig adjustment support device according to an embodiment of the present invention.

FIG. 2 is a flowchart of an assembly jig adjusting process using the apparatus of FIG.

FIG. 3 is a diagram showing an example of a monitor display.

FIG. 4 is a diagram showing an application example in which the device of FIG. 1 is connected to an automatic panel measurement system.

FIG. 5 is a flowchart of a conventional assembly jig adjusting process.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Measuring device (position measuring means) 2 ... Detection switch (clamp state detecting means) 5 ... Central processing part (statistical processing means) 6 ... Database (storage means) 7 ... Terminal device (display means)

Claims (1)

[Claims] 1. A position measuring means for measuring a position of a work and a predetermined portion of an assembly jig, a clamp state detecting means for detecting a clamp state of a work, and data of the position measuring means and the clamp state detecting means. Car body assembly jig adjustment support, comprising: statistical processing means for collectively performing statistical processing, storage means for storing results of the statistical processing means, and display means for displaying results of the statistical processing means. apparatus.