Device for metering lubricants in metal cutting

Abstract

The pump block of a metering pump for metering liquids including a first feed duct system for the liquid to be delivered; a metering chamber connected to said feed duct system; a pump duct; a metering piston arranged in the metering chamber such that it can slide along an axis, said metering piston being set up to pump a certain quantity of a liquid present in the metering chamber through a stop valve into the pump duct when moved in a direction along said axis; and an actuator device for moving the metering piston along said axis.

1 . A metering pump for metering liquids, with at least one pump block comprising:
 a first feed duct system for the liquid to be delivered; a pump duct; and   a pump device for pumping the liquid from the feed duct system into the pump duct,   wherein the pump block has a housing cover in the form of a cylinder or of a truncated cone, the feed duct system leading to at least one opening arranged in the housing cover.   
     
     
         2 . The metering pump as set forth in  claim 1 , wherein the pump device has a metering chamber connected to the first feed duct system, a metering piston arranged in the metering chamber so as to be slidable along an axis, and an actuator device for moving the metering piston along said axis, the metering piston being set up to pump a certain quantity of a liquid present in the metering chamber through a stop valve into the pump duct when moved in a direction along said axis. 
     
     
         3 . The metering pump as set forth in  claim 1 , characterized-by further comprising:
 a pneumatic actuator device operable by a pneumatic medium, particularly pressurized air, and a second feed duct system for the pneumatic medium for operating the pneumatic actuator device, said second feed duct system leading to at least one opening arranged in the housing cover.   
     
     
         4 . The metering pump as set forth in  claim 1 , further comprising:
 a mounting block with at least one receptacle that is adapted to the shape of the housing cover of the pump block and in which the pump block is arranged in a flush-fitting manner.   
     
     
         5 . The metering pump as set forth in  claim 4 , further comprising:
 a circumferential groove, on the housing cover of the pump block, as well as a screw arranged in a continuous threaded hole in the mounting block, the groove, the threaded hole and the screw being embodied and arranged such that, in an assembled pump block, the screw can reversibly engage with the groove, thus enabling the reversible positive fixation of the pump block in the mounting block in the direction of the longitudinal axis.   
     
     
         6 . The metering pump as set forth in  claim 4 , wherein the mounting block has a third feed duct system for the liquid; and
 a first circumferential groove is provided on the wall of the receptacle connected to the third feed duct system and arranged such that the at least one opening of the first feed duct system of a pump block arranged in the mounting block overlaps with the first circumferential groove; or   that the third feed duct system leads to at least one opening arranged in the wall of the receptacle, and a first circumferential groove is provided on the housing cover of a pump block arranged in the mounting block that is connected to the first feed duct system and arranged such that the at least one opening of the third feed duct system overlaps with the first circumferential groove;   so that the first and third feed duct systems form a continuous feed duct system for liquid.   
     
     
         7 . The metering pump as set forth in  claim 6 , wherein the mounting block has a fourth feed duct system for pneumatic medium; and
 a second circumferential groove is provided on the wall of the receptacle is connected to the fourth feed duct system and is arranged such that the at least one opening of the second feed duct system of a pump block arranged in the mounting block overlaps with the second circumferential groove; or   that the fourth feed duct system leads to at least one opening arranged in the wall of the receptacle, and a second circumferential groove is provided on the housing cover of a pump block arranged in the mounting block that is connected to the second feed duct system and arranged such that the at least one opening of the fourth feed duct system overlaps with the second circumferential groove;   so that the second and fourth feed duct system form a continuous feed duct system for pneumatic medium.   
     
     
         8 . The metering pump as set forth in  claim 6 , characterized by further comprising:
 sealing elements that are arranged at least one of in the receptacle of the mounting block and around the housing cover of the pump block along the periphery and are capable of connecting in a sealing manner the at least one opening of the first feed duct system or at least one of the third feed duct system and the first circumferential groove and of connecting in a sealing manner the at least one opening of the second feed duct system or of the fourth feed duct system and the second circumferential groove.   
     
     
         9 . The metering pump as set forth in  claim 4 , wherein the mounting block has two parallel flat walls and at least one of the third feed duct system and the fourth feed duct system leads to an opening on both walls, the corresponding two openings being arranged such that one opening coincides with a corresponding opening of another, equivalent metering pump when the two metering pumps are placed with their walls one on top of the other. 
     
     
         10 . The metering device for metering liquids, with at least one metering pump as set forth in  claim 1 . 
     
     
         11 . The metering device as set forth in  claim 10 , wherein two or more metering pumps have a mounting block with a receptacle that is adapted to the shape of the housing cover of a pump block of the metering pump and in which the pump block is arranged. 
     
     
         12 . The metering device as set forth in  claim 11 , wherein the two or more metering pumps are arranged in a stack, wherein two parallel, flat walls of each of the mounting blocks of two adjacent metering pumps lie flush one on top of the other. 
     
     
         13 . The metering device as set forth in  claim 12 , further comprising:
 a reservoir for the liquid, a common feed duct system of the metering pumps for the liquid, and   a shut-off valve for the reversible disconnection of the feed duct system from the reservoir.   
     
     
         14 . The metering device as set forth in by  claim 10 , further comprising:
 a device for the detachable connection of the mounting blocks of two adjacent metering pumps, that are functionally connected to the mounting blocks to be connected.   
     
     
         15 . The metering device as set forth in  claim 14 , wherein the device is embodied such that, when the functionally connection of the device to the mounting blocks to be connected is established, the mounting blocks are braced against each other.