DE314307C - - Google Patents

Description

In the mass production of certain workpieces, especially stamped parts, such as z. B. chain links and the like., Reject parts often arise, their main cross-sectional shape is in some way incomplete (scrap) and which therefore of the remaining parts are to be sorted out. The present invention relates to a new method, 'which a particularly advantageous, mechanical separation of such missing parts is permitted, and It is true that the essence of this new process consists in separating them Workpieces each as a final link; switches on in a pressure medium line, whose Cross-section is such that it matches the cross-section to be tested of the regular The workpiece to a full area.

Then in a known / way through

■ Movement of a piston in a press cylinder a pressure medium is put in tension so that it is through the means of the to be tested The workpiece is looking to exit the closed line. Depending on the shape of the Boundary lines of the workpiece cross-section to be tested of the standard form more or corresponds to less, the workpiece switched on in the line 'becomes one more or bring about a less tight seal, so that the load was equally strong with each work step The plunger can displace the pressure medium more or less quickly! The different rapidly failing movement of the plunger is then in a known manner used to control scrap parts (flap, slide) known type, which separate the defective workpieces from the regular workpieces.

Special \ ^ dvantages of the new method are firstly the complete \ ermeidung of movable Tastwerkzeugen with corresponding drives, and also the light Umsteil-, bility for differently shaped workpieces, as you have to replace only the die in most cases that the workpiece 'while taking the exam. Another essential advantage is that the new method is not restricted to particularly simple shapes, as would be the case when using feeler tools, but rather that workpieces of any cross-section, for example with openings, can easily be shaped in can be checked for correctness in one operation, and in a much more perfect way than would be possible with tactile tools, since the latter can only be arranged in a limited number. . ·

An example embodiment of a Apparatus for carrying out the new process is shown schematically in the following Drawing illustrates. It shows:

Claims (5)

FIG. I shows a section through the test device in elevation with it in the test position Workpiece. Fig. 2 is a section through the testing device in plan. The workpiece to be tested consists, for example, of a toothed chain link a, which is provided with two circular openings b (see FIG. 2). By means of any conveying or feeding device of a known type, this workpiece α is first brought under or opposite the cavity c of a die d, the shape of which corresponds exactly to the outline of a normally designed workpiece. In order to fill the openings b of the workpiece, two pins e , which correspond exactly to these openings in terms of arrangement and diameter, protrude into the cavity c . An expediently resiliently rising punch f , moved by any drive, now inserts the workpiece into the die d until it hits against intended stops, for example the pin g of the ejector he s h . Now the piston i, falling under the influence of a weight or spring load, starts moving and displaces the pressure medium (air, gas, liquid) contained in the cylinder k , which now tries to escape through the line I. If the workpiece to be checked for the correctness of its cross-section corresponds to the cross-section of a standard workpiece or the 35. corresponds exactly to the free cross-section of the cavity c, so. the exit of the pressure medium is completely or almost completely prevented, so that the piston i does not move or moves only slightly in a certain time ga>:. If, on the other hand, the workpiece is at any point its ·; Cross-section unrelated, in such a way that parts of the regular cross-section are missing, the pressure medium will be able to easily escape through the spaces created at this position, so that the piston i covers a greater distance at the same time. On the other hand, if the cross-section to be tested is too large at any point, the workpiece cannot be fully inserted into the cavity c. introduce, but is already in the tapered part m of this cavity. In order to always prevent a seal between the workpiece and the die d in this case, bores or channels η are provided on the tapered surface m , through which the pressure medium then also escapes. The piston i will therefore also lower itself if the cross-section of the workpiece to be tested is larger than the standard cross-section at any point. The movement of the piston i , which varies in size depending on the failure of the test at the same times, is then used in a known manner to control a sorting device of any kind which, after the workpieces have been ejected again from the die ei, separates the regular A corkpieces from the defective workpieces. The regular and faulty workpieces can then be collected in separate collecting containers, if the machine in question is only intended for a test of the type explained above. However, other tests of a different kind can just as well be carried out in the same machine, in which case the regular workpieces do not immediately end up in the waste, but must be fed to the following location or points by means of a suitable conveying device. Furthermore, it would of course also be conceivable to combine a test point of the type explained above with one or more further processing points in a machine, such that, for example, the entire machine or the processing tools of the points following the test point are shut down when there is a the inspection body reveals the defectiveness of the workpiece in one respect or another. With the type of test described, the missing pieces, their cross-section is too large at any point, mixed with the remaining missing pieces, the cross-section of which au is too small at some point. In most cases, this won't be a special one The disadvantage is that with such mass-produced parts such as stamped parts and the like, it is customary to rework defective workpieces is out of the question. However, if you need such rework in special cases and accordingly a separate sorting out of the missing pieces according to the type of defect should be important, then a achieve such in a simple manner that the stamp is known per se Way is also used to control the sorting device. In this way lets can then easily achieve that even workpieces whose cross-section at any Place too big! is, which therefore result in an imperfect stroke of the punch, also if be eliminated separately. H5 patent claims: . i. Method for testing and separating workpieces of various types according to the Shape of their outlines, thus geo indicates that the workpiece to be tested as a terminating element in the line of a pressure medium (e.g. liquid or Air) is introduced in such a way that defective workpieces result in an imperfect finish and that by this taking place outflow of the pressure medium an adjustment of the separating device takes place. 2. The method according to claim i, characterized in that the workpiece (a) is introduced into a die (d) adapted to its regular shape and then the pressure medium is passed onto the workpiece. ' 3. The method according to claim 1, characterized in that the pressure medium between Workpiece and die base is introduced. 4. The method according to claim 1 to 3, characterized in that the for Insertion of the workpiece 'into the die serving punch. (/) for controlling the separating device is also used for the purpose of separate separation of the workpieces that are too large. 5. Apparatus for carrying out the method according to claim 1 to 4, characterized by an expediently replaceable die (d) with a conically widened input (im) 'and channels (- ») for the immediate outflow of the pressure medium when the workpiece is too large. 1 sheet of drawings.