Balance mechanism of drilling and milling head of gantry movable type numerical-control drilling and milling machine

Abstract

A balance mechanism of a drilling and milling head of a gantry movable type numerical-control drilling and milling machine comprises self-locking spring balancers. Two ends of a steel wire rope in a body of each self-locking spring balancer respectively penetrate out of two sides of a shell of the self-locking spring balancer, the steel wire rope on one side of the shell of each self-locking spring balancer is connected with a connector of a first swing bolt by a first hook, the first swing bolts are fixed onto upright column assemblies by first nuts, the steel wire rope on the other side of the shell of each self-locking spring balancer is wound around a roller and then is connected with a connector of a second swing bolt by a second hook, and the second swing bolts are fixed onto a drilling and milling head assembly by second nuts and can move along with the drilling and milling head; and the rollers are sleeved on axles, the axles are fixed onto supports, the supports are fixed onto the upright column assemblies, and sliding sleeves are arranged among the rollers and the axles. The balance mechanism has the advantages that stress on the drilling and milling head can be balanced, driving force of a spindle of the drilling and milling head can be effectively relieved, and the running stability of the drilling and milling power head is guaranteed.

Description

technical field [0001] The invention relates to the technical field of numerical control drilling and milling equipment, in particular to a balance mechanism for balancing the weight of a drilling and milling power head and the drilling and milling force generated during drilling and milling in a gantry mobile numerical control drilling and milling machine. Background technique [0002] The CNC gantry drilling and milling machine is a processing equipment for large parts. The structure of the gantry mobile CNC drilling and milling machine is characterized by the movement of the gantry frame and the fixed worktable, so there is no limit to the weight of the workpiece, and super long parts can be processed. With its automation With the continuous improvement of performance and compounding degree, it has been widely used. In the gantry mobile CNC drilling and milling machine, the drilling and milling mechanism is usually equipped with a special counterweight structure to balanc...

AI Technical Summary

Problems solved by technology

The disadvantage of this structure is that after the wire rope has been used for a period of time, the wire rope will be worn out. If it is not replaced in time, the wire rope will break. Since the counterweight mechanism does not have a self-locking mechanism, the wire rope will break, and the counterweight will fall to damage the bed of the machine tool, and the wire rope will break. It is difficult to replace the steel wire rope afterwards; if the counterweight is not used, the power of the lifting spindle must be increased because the lifting spindle of the power head bears a large force of gravity, which consumes more energy. On the other hand, the power The load on the head spindle is not uniform when it is raised and lowered, and the speed error generated during the movement will increase, resulting in machining accuracy errors

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