METHOD TO ENSURE THE QUALITY OF UNIONS BY GETTING A
PRESSURE ELABORATED IN A PRESSURE LIGHTING DEVICE,
AS WELL AS THE TOOL CRIME AND THE DEVICE OF
PRESSURE ENGRAVING Description of the invention The invention relates to a method for ensuring the quality of pressure crimping joints made in a pressure crimping device, in accordance with the preamble of claim 1. The invention is further related to a crimping tool in accordance with the preamble of claim 3 and a press-crimping device in accordance with the preamble of claim 6. From DE 4 038 658 A1 a pressure crimping device is known which operates in accordance with the method under consideration and with a crimping tool of the type under consideration. To fix connectors to electric cables with several wires and an insulating lining, pressure crimping has become widespread. For this, a contact component by pressure crimping, which is first configured in the form of a flat piece of sheet metal, is formed around the end of the conductor by moving one or the other of two moving elements of the tool relative to one another, configured as dies, and then fixed to the end of the conductor so that a secure contact is established. In particular, wire harnesses used in automotive vehicles are constituted by a multitude of the most diverse electrical conductors to which, by means of pressure crimping, connectors or contact components must be provided by crimping. The quality assurance of the crimping processes is carried out, for example, by proceeding in such a way that during the pressure crimping the force-stroke characteristic curve of the tool elements is captured, immediately comparing it with a curve Prescribed force-travel characteristic stored in the pressure crimping device, or from the measured force-travel characteristic curve, the measured data are calculated which are compared with the stored stored data. The prescribed data or the prescribed force-travel characteristic curve are determined when the tool comes into operation. In practice, the problem arises that there is a multitude, both of different conductors as well as contact components by pressure crimping, which require in each case the application of different tools. These tools can be used in a common pressure crimping device, and are exchanged in each case. It results on the one hand in a large consumption of time and on the other hand expensive, to determine and store the prescribed data indicating a perfect pressure setting after each tool change. The object of the invention is to refine a method of the type under consideration in the sense that during the operation of the press-crimping device with different tools an unobjectionable quality of the joints is obtained by crimping under pressure, however short intervals of tool change. The object of the invention is also to create a crimping tool of the type under consideration for carrying out the aforementioned method. Additionally, the object of the invention is the task of creating a pressure crimping device that allows using such a tool. The part relating to the method of the task of the invention is solved with the features of the main claim. Due to the fact that the tool is equipped with a data carrier containing specified data specific to the tool, and that these data are then immediately compared with the respective measurement data, a complex determination of the prescribed data is no longer required. of a tool change. The method according to the invention is suitably improved with the features of claim 2. Claim 3 is related to the crimping tool with which the corresponding part (a) of the task of the invention is solved. The crimping tool of claim 3 is suitably refined with those (features) of claims 4 and 5. Claim 6 characterizes the crimping device to be employed with a crimping tool in accordance with the invention. The pressure crimping device according to claim 6 is suitably refined with the features of claims 7 and 8. The invention is explained below in an exemplary manner and in greater detail on the basis of schematic drawings. Represent: Figure 1 in perspective representation a device of crimping under pressure with the disassembled toolFIG. 2 shows a tool for being used in the pressure crimping device according to FIG. 1, FIG. 3, a characteristic force-travel curve as it results when the mobile tool elements are pressed one against the other. to another, to manufacture a press-fit connection, figure 4 a cross section through a press-fit connection, and figure 5 a perspective view of a data carrier. In the present description, figures 1 and 2 were taken to a large extent from DE 4 038 658 A1 mentioned in the introduction, whose content is incorporated into the content of the following application as an example of a pressure crimping device and a crimping method. under pressure. The pressure crimping device designated entirely by 2 is formed by a crimping press in which a movable die up and down by an actuator element not shown in detail ends in an adapter 4. Adapter 4 protrudes into the a space 6 for accommodating the tool which below has a plate 8 that rests on a leg 12 of the device 2 for crimping under pressure through a manometric capsule (only the duct 10 leading to the manometric capsule is shown). To operate the pressure crimping device an operation board 14 is provided which forms an interface with a data processing device 15 contained in the pressure crimping device comprising microprocessor, data memory, program memory, etc. In the housing space 6 of the tool of the press-fit device 2, a tool can be inserted, which in FIG. 2 is designated in its entirety with 14. This tool contains, in order to mount it in the adapter 4, a mounting component 16 which it is rigidly connected to an element 18 of the tool configured as an upper die, and which together with it can be moved upwards and downwards within a frame 20. Arranged in front of the tool element 18, in a base body 22 find another element 24 of the tool configured as a lower die. To feed the tool with components
26 contact by pressure crimping serves an installation
28 that by means of a lever 32 that is moved by moving it, moves step by step forward a band 30 with the contact components 26 by crimping under pressure. When a contact component 26 is placed on the lower element 24 of the tool by means of pressure crimping, between the elements 18 and 24 of the tool a cable end (not shown) with insulated conductors is placed and by means of crimping under pressure. unites firmly with the contact components 26 by crimping. During the crimping process, by measuring the force K on the tool exerted by the adapter 4, which is carried out by means of the manometric capsule connected through the conduit 10, and of the path taken by the adapter 4 ( the corresponding travel sensor is not shown) the characteristic force-travel curve shown in FIG. 3 results. This characteristic force-travel curve first passes through a preparation phase I inside which the upper element 18 of the tool it comes into intimate contact with the contact component 26 by pressure crimping and the end of the cable, and then goes through the phase II crimp under pressure itself. The course of the curve is in each case specific for a single type of contact components by crimping, cable and tool. The actual evaluation of the measurement is carried out above a threshold force K3 to suppress deviations. The dotted S curve indicates a prescribed curve representing an unobjectionable pressure crimp. As the nominal magnitudes for recognizing a perfect pressure crimping, the curve S itself or the integrated surface F can be taken below the curve S, which is a measure of the pressure crimping work carried out. The data interpreting the curve S and / or the surface F are stored in the data processing device that is provided in the crimping device 2. During a pressure crimping process, the actual data are collected and compared with the prescribed data. In the case of a deviation of the force-travel characteristic curve downwards (Si) or upwards (Su) of the prescribed curve, an error indication occurs. To recognize a defective pressure crimp, additional criteria can also be used, such as too large a deviation at a single measuring point, additional measurements of time intervals, etc. Figure 4 shows a cross section through a cable provided with a contact component 26 by crimping, cut in the area of the insulated conductors. The contact component 26 can be seen by pressure crimping completely folded in the manner of a bushing, which in its interior imprisons the conductors 32 of the cable in a positive fit for safe contact. The device described hitherto and the method described hitherto are known from DE 4 038 658 Al, and therefore are described only partially. As explained, for different joints by pressure crimping, it is necessary to use different tools 14 in the crimping device 2. According to the invention, the tool 14 is equipped with a data carrier 36 which in the example shown is applied to the frame 20. The task and function of the data carrier 36 are as follows: When the tool 14 is inserted for the first time once in the pressure crimping device 2, the data processing device 15 located in the pressure crimping device 2 determines and stores the prescribed data, for example on the basis of the prescribed S curve and / or the integral F, so that they are available as prescribed quantities for future pressure crimping operations. For this purpose the mechanical firmness is verified, electrical resistance and optical quality of a pressure crimping connection, and the measured data of the perfect pressure crimping connection are stored as prescribed data in the data processing device of the crimping device. Before removing the tool 14 from the pressure crimping device 2 to replace it with another tool, the prescribed data of the tool 14 of the memory of the data processing device 15 of the pressure crimping device 2 are selected and inserted into the support 36 of data. In this way, the same tool 14 contains its own prescribed data. Additionally, when the tool 14 is removed, the amount of the connections by pressure crimping with it can be introduced into its data carrier 36. If the tool 14 goes back into operation, then its prescribed data can be selected from the data carrier 36 and entered into the memory of the data processing device 2 of the pressure crimping device 2, so that the prescribed data is found. immediately available. Now the first pressure crimping process is carried out at the usual speed, and it can be corroborated immediately if this crimping process is correct or not. To configure the data support 36 and for the data transfer of the data medium 36 to the data processing device 15 of the pressure crimping device 2, there are the most diverse embodiments. Figure 5 shows a data carrier 36 inserted in a recess 38 of the frame 20 having a base plate 40 fixed to the bottom of the recess on which the data carrier itself is mounted. In this way, the data carrier 36 is mounted in a protected manner in the frame 20. The data carrier 36 can be a simple write / read memory that has a mechanically contactable or wireless input and output interface, by means of which You can select and enter data using a manual device. In the case of a complex embodiment, the data carrier 36 may contain a complete microprocessor with program memory, data memory and reception and emission device, for example with antenna and transponder (transmitter / receiver sent by pulses). The data processing device 15 of the pressure crimping device 2 has correspondingly an input and output unit by means of which the data can be transferred, for example by means of a hand-held device. In a more comfortable and functionally safer embodiment, the pressure-engaging device 2 has in the area of the tool receiving space 6 a cutting point 46 which works by contact or wirelessly and which is disposed opposite to a corresponding cut-off point configured in the tool 14 according to FIG. 3, in the rear part of the frame 20. An exchange of data is automatically carried out through the cut-outs when inserting or upon entering into functions a tool 14, and when removing or ceasing operation of the tool 14. It is understood that in this case it is convenient that the complete data carrier 36 is disposed on the back side of the frame 20. It is also understood that it is possible to use the more diverse transmission techniques (through contacts, wireless via ultrasound, infrared radiation, through antenna with emitter, etc.). In the case of transmissions made by radio, there are no limitations with regard to the spatial arrangement of the data carrier and the input and output device of the data transmission device of the pressure crimping device 2. In the data carrier 36 of the tool 14, it is possible to enter prescribed data upon cessation of the operation of the tool 14 corresponding, for example, to a mean value of a certain number of measurements. Based on these data, the tool can then be revised in a tool management center with respect to its later utility in relation to its operation and useful life, and in comparison with the original prescribed data, as well as eventually with the amount of the total number of unions by pressure crimping made with the tool. It is understood that the invention can be applied to the most diverse crimping devices or crimping presses and tools. For example, the volume of a tool can be substantially smaller than that represented in FIG. 2. In special embodiments, for example, only the elements 18 and 24 of the tool can be exchanged. Then one of these elements of the tool contains the data support. In total, with the invention is created a possibility to monitor without loss of time and with exceptional security the quality of connections by pressure crimping produced with the most diverse tools, being that you can also capture in a predictable way the state itself of the tools The prescribed data specific to the tool stored in the tool itself does not only refer to the tool itself, but preferably also to the contact component by pressure crimping and to the cable for which the tool must be used. They do not depend or only to a very small extent on the respective pressure crimping device, and can, if necessary, contain a corresponding additional parameter. The invention can be applied in all those places where several tools with tool-specific data used to monitor the quality or to control a device that works with the tool are alternately used in one or several devices.