DE880495C - Procedure for revision of threads - Google Patents

Description

Procedure for revision of threads Facilities are known which make the laborious Ejus screwing easier by hand. It has also long been known so-called torque wrenches to avoid choking screws, studs or nuts to use the screws after reaching a certain torque tighten further. Through all of this, the idea of the invention is the degree of screwability automatically to be determined and used to control sorting devices, not has been suggested because, although this is a great need for fully automatic Machines and processes exist and the aforementioned state of the art has existed since Has long been known, but nobody has taught threads that are mass-produced be produced on machines, also with the help of automatic measuring equipment on their To check interchangeable screwing in order to find the ones required for the revision of the thread To free labor.

The object of the invention can be achieved with the help of known machines and devices for checking the diameters, in particular the pitch diameter cannot be resolved. Because even if the pitch diameter is correct, it is at such mass parts, whose individual parts to be screwed together from one another Substances exist in which z. B. Interchangeable steel bolts with nuts made of light metal are to be screwed together, but not the screwability within narrower limits guaranteed.

The invention solves the problem set by it, the degree of screwability by measuring the forces required for screwing in and uses the torque exerted when screwing in to control sorting devices.

This can e.g. B. happen that when checking a Genvindemutter the measuring mandrel and, when testing a threaded mandrel, the measuring ring by means of a mechanical, hydraulically or electrically operated pushers are pushed forwards and into one another, whereby the easy beaking of the thread in a known manner by designing the Measuring body is guaranteed, and the torque by known devices, z. B. by changing a resistance with the help of a bridge circuit, inductively or is measured capacitively. The invention has the advantage that for committee and Well only one measuring body is needed.

If the threads are too wide, a torque occurs when screwing in, which is practically zero.

After reaching the thread depth therefore controls according to the invention which determines the relative movement between the test item and the measuring ring or

The drive motor that causes the measuring mandrel automatically switches over a contact, or a clutch for changing the direction of rotation is actuated. Simultaneously a switch for Iden sorting boxes is made with the help of elements known per se "Reject due to too wide a thread" triggered.

If the thread is too strong, the measuring body can only be opened a few Screw in gears or not at all, then one is set as permissible in any case Torque amount exceeded and with the help of a known device the test device reversed in the direction of rotation, at the same time a magnet od. Like. A switch for the sorting box "Nachanarbeit" operated.

All test items that can be designated as sufficiently screwable are lying with regard to their torques in an arbitrarily adjustable range.

Such test items are checked for screw-in depth after they have all been tested are changed in their direction of movement by an already mentioned contact and fall into the appropriate box for "good".

Claims (1)

PATENT CLAIM: Method for automatic testing of threads their interchangeable screwing, characterized in that the screwing to be used torque to control sorting devices.