Novel shield bolt head hexagonal socket machining tool and machining technology

Abstract

The invention discloses a novel shield bolt head hexagonal socket machining tool and a machining technology. The hexagonal socket machining tool comprises a hexagonal socket forming tool body and a rotary morse tool handle. A clamping end is arranged at the tail of the hexagonal socket forming tool body and clamped to one end of the rotary morse tool handle. The other end of the rotary morse toolhandle is connected with one end of a lathe tailstock. A tailstock handle is arranged at the other end of the lathe tailstock. According to the novel shield bolt head hexagonal socket machining tool and the machining technology, the original traditional compression technology is successfully converted into a machining technology, the machining technology is simple, high in operability, not limitedby the length of a rod portion and high in machining precision and machining speed, the problem that compression of a hexagonal socket in the head of a bolt is limited by the length is successfully solved, and the size precision of the hexagonal socket in the head of the bolt is also improved. According to the novel shield bolt head hexagonal socket machining tool and the machining technology, bymeans of high-speed rotation of a lathe, the tool is driven to rotate at a high speed, extrusion is performed by means of small thrust force provided for a workpiece in the axial direction by a toolforming surface during rotating, and therefore, the hexagonal socket is extruded out.

Description

technical field [0001] The invention relates to a novel hexagonal inner hexagonal machining tool for the head of a shield bolt and a processing technology, in particular to forming a hexagonal inner hexagonal head of a high-strength, long bolt head for a shield machine. Background technique [0002] At present, with the rapid development of our country, shield machines are widely used in projects such as urban subways, railway tunnels, water diversion projects, cross-river road tunnels, and urban pipeline projects. The demand for shield machines has increased, and the demand for supporting parts for shield machines has also increased. There are many types of shield bolts, the length of which is generally in the range of 300mm-1500mm, and the inner hexagon of the head needs to be processed, such as figure 1 As shown, the width across sides of the inner hexagon is required to be 14 (tolerance is +0.08~+0.33mm), and the hole depth is greater than 10mm. The traditional inner he...

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Problems solved by technology

There are many types of shield bolts, the length of which is generally in the range of 300mm-1500mm, and the inner hexagon of the head needs to be processed, such as figure 1 As shown, the width across sides of the inner hexagon is required to be 14 (tolerance is +0.08~+0.33mm), and the hole depth is greater than 10mm. The traditional inner hexagon processing adopts the profiling process, but the processing of bolts above 600mm requires too much equipment , for general large and medium-sized enterprises cannot produce, even if the enterprises that can produce will invest a lot of production costs, not only the production efficiency is low, but also the dimensional accuracy of the inner hexagon is not easy to control

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