Symmetric clamp for grinding of drill core

Abstract

The invention discloses a symmetrical jig for grinding drill cores, which comprises a jig cylinder, a mandrel is arranged on the jig cylinder, two positioning columns are arranged at one end of the mandrel, and a rear end is arranged at the other end of the mandrel. The inner side of the rear plug is provided with a radial ball bearing, and a rear washer is arranged between the rear plug and the radial ball bearing, and the upper side and the lower side of the inside of the clamp cylinder are symmetrically arranged with For a cylindrical bearing and a thrust ball bearing, an adjusting nut is arranged on one side of the cylindrical bearing, and a sealing ring is arranged on the side of the adjusting nut close to the mandrel. This jig for grinding the drill core symmetry, when grinding the outer circle of the drill bit, and when the drill core and the outer circle are asymmetrical, the drill tip of the drill bit is placed in the jig, and the symmetry tolerance of the two positioning columns is not greater than 0.03mm, good clamping effect, simple structure, reasonable layout of bearings and adjusting nuts, simple and practical, easy to operate, can ensure the outer circle of the symmetrical sharpening part of the drill core, and ensure product quality requirements.

Description

technical field [0001] The invention relates to the technical field of fixtures, in particular to a symmetrical fixture for grinding drill cores. Background technique [0002] Drill bits are the tools used in drills, drilling machines, and drilling rigs. Twist drill bits with spiral grooves are commonly used in metal cutting. Carbide drill bits, diamond drill bits, etc. are used in geological exploration. Generally, after long-term use, drill bits need The drill core is ground to ensure the working efficiency of the drill bit in the later stage. When grinding the drill core, it is generally necessary to use a fixture to fix it, so as to facilitate the drill core grinding. However, when grinding the outer circle of the drill bit, When the drill core and the outer circle are asymmetrical, the drill tip of the drill bit cannot guarantee the symmetrical grinding of the drill core and the outer circle of the edge, so that the product quality requirements cannot be guaranteed. C...

AI Technical Summary

Problems solved by technology

[0002] Drill bits are the tools used in drills, drilling machines, and drilling rigs. Twist drill bits with spiral grooves are commonly used in metal cutting. Carbide drill bits, diamond drill bits, etc. are used in geological exploration. Generally, after long-term use, drill bits need The drill core is ground to ensure the working efficiency of the drill bit in the later stage. When grinding the drill core, it is generally necessary to use a fixture to fix it, so as to facilitate the drill core grinding. However, when grinding the outer circle of the drill bit, When the drill core and the outer circle are asymmetrical, the drill tip of the drill bit cannot guarantee the symmetrical grinding of the drill core and the outer circle of the edge, so that the product quality requirements cannot be guaranteed

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