Composite screw tap

Composite screw tap

The invention discloses a composite screw tap which comprises first tap teeth and second tap teeth. A sleeving hole coaxial with the first conical teeth is formed in the first conical teeth, and firstpin holes penetrating through the first conical teeth are formed in the radial direction of the slee...

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Hauptverfasser: LIANG ZHAOBI, CHEN ZHENBIN, GAO ZHIFA, YU XUECONG, CHEN GUOLIANG, HUANG JINYONG, CHEN SHENGQIANG, HUANG MEIXIAN
Format: Patent
Sprache:chi ; eng
Schlagworte:
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
THREAD CUTTING
TRANSPORTING
WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTIONTHEREWITH
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creator LIANG ZHAOBI
CHEN ZHENBIN
GAO ZHIFA
YU XUECONG
CHEN GUOLIANG
HUANG JINYONG
CHEN SHENGQIANG
HUANG MEIXIAN
description The invention discloses a composite screw tap which comprises first tap teeth and second tap teeth. A sleeving hole coaxial with the first conical teeth is formed in the first conical teeth, and firstpin holes penetrating through the first conical teeth are formed in the radial direction of the sleeving hole. A second screw tap neck smaller than the second taper teeth in small diameter is arranged at the upper end of the second taper teeth, and second pin holes penetrating through the second screw tap neck are formed in the second screw tap neck in the radial direction. The second screw tap neck and the first pin holes can be sleeved in a sliding and rotating manner in the axial direction. Pin columns are arranged in the first pin holes and the second pin holes. The breaking strength of the pin columns is smaller than that of the second screw tap neck. According to the composite screw tap, internal threads of two specifications can be machined under the condition that the screw tap isnot replaced; the breakin
format Patent
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A sleeving hole coaxial with the first conical teeth is formed in the first conical teeth, and firstpin holes penetrating through the first conical teeth are formed in the radial direction of the sleeving hole. A second screw tap neck smaller than the second taper teeth in small diameter is arranged at the upper end of the second taper teeth, and second pin holes penetrating through the second screw tap neck are formed in the second screw tap neck in the radial direction. The second screw tap neck and the first pin holes can be sleeved in a sliding and rotating manner in the axial direction. Pin columns are arranged in the first pin holes and the second pin holes. The breaking strength of the pin columns is smaller than that of the second screw tap neck. 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language chi ; eng
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subjects MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
THREAD CUTTING
TRANSPORTING
WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTIONTHEREWITH
title Composite screw tap
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