Multi-claw floating pressure head special for casting blank machining

Abstract

The invention discloses a multi-claw floating pressure head special for casting blank machining. The pressure head comprises a chuck, a plurality of jaws and pressure head bodies, wherein the plurality of jaws are mounted on the chuck at equal intervals, an arc-shaped groove is formed in the clamping surface of each jaw, at least one mounting hole is formed in the top wall in each arc-shaped groove, a magnet is fixed in each mounting hole, each pressing head body is provided with an arc-shaped top face matched with the arc-shaped groove, the pressing head body is embedded into the arc-shaped groove after being attracted by the magnet, the non-arc-shaped top face side of the pressing head body protrudes out of the arc-shaped groove and is used for clamping a casting blank, and the pressing head body can relatively slide along the top wall of the arc-shaped groove through the arc-shaped top face of the pressing head body. The floating arc-shaped pressing head bodies are additionally arranged on the jaws, the arc-shaped top faces of the pressing head bodies shift along with the change of the inclination of the blank after the jaws are subjected to the effect of clamping force, the clamping face of the pressing head bodies is promoted to be completely attached to the blank, face contact is achieved, finally, the clamping force reaches the maximum, and the clamping process is completed.

Description

technical field [0001] The invention relates to the technical field of casting forming devices, in particular to a multi-claw floating pressure head for casting blank processing. Background technique [0002] When molding a metal mold, in order to facilitate the smooth release of the mold from the molding sand, generally a small micro-taper (commonly known as "draft angle") is provided on the radial contour surface of the mold to prevent poor demoulding or cavity surface Strain, so the rough surface of the cast product has a corresponding slope. [0003] Therefore, when the surface of the casting blank is used as the positioning reference for rough machining, if the three-jaw chuck of the ordinary lathe is used for clamping, due to the influence of the draft angle, the clamping jaws cannot completely match the clamping surface of the blank, and the The virtual clamping phenomenon of point contact or line contact not only has a large runout of the casting, but also requires ...

AI Technical Summary

Problems solved by technology

[0003] Therefore, when the surface of the cast blank is used as the positioning reference for rough machining, if the three-jaw chuck of the ordinary lathe is used for clamping, due to the influence of the draft angle, the clamping jaws cannot completely match the clamping surface of the blank, and the The virtual clamping phenomenon of point contact or line contact not only has a large runout of the casting, but also requires adjustment of the coaxiality, which seriously affects the work efficiency, and the clamping force will be greatly reduced. If the cutting force is slightly too large, the fast rotating If the casting is affected by centrifugal force, it may fly off the jaws and cause an accident, which poses a major safety hazard

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