Composite type screw tapper for threading machine
A thread machine and composite technology, which is applied in thread cutting tools, metal processing equipment, tangent devices, etc., can solve problems such as inconvenience in processing, and achieve the effect of convenient operation and simple structure.
Inactive Publication Date: 2014-06-11
AVIC STANDARD PARTS MFG
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Problems solved by technology
[0003] In order to combine groups of taps into single taps, one-time clamping, and one-time cutting of internal threads, the invention provides a compound thread machine tap to solve the inconvenience caused by multiple or grouped taps.
Method used
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Embodiment Construction
[0023] Now take thread specification 1-12UNF-3B as an example to illustrate the specific design method of the present invention.
[0024] Image 6 It is a front view of an inch-machine thread composite tap designed according to the present invention. The number of teeth of the tap is 4 teeth, the total length L=150mm, the front end diameter D1 is 22.86mm, the pitch of the thread P=2.1167mm, the initial cutting part and the finishing part The length of the cutting part L1=18 times the thread pitch P, which is 38mm, the length of the clamping section of the taper shank L3=30mm, the length of the cylinder between the initial cutting part and the finishing cutting part L4=4mm, and the diameter is Φ21mm; Figure 7 It is the tooth shape diagram of the initial cutting part of the tap, and the taper angle α of the cone part in the initial cutting part is 1°48'; Figure 8 is the tooth shape diagram of the fine-cut part, and the cone angle α of the cone part of the fine-cut part is 2°8...
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The invention discloses a composite type screw tapper for a threading machine. The appearance and structure of the composite type screw tapper for the threading machine are as shown in the figure. The composite type screw tapper for the threading machine is formed by a tapper body portion, a column portion and a tapper handle portion; 3 to 4 grooves are formed in the tapper body portion and the column portion of the screw tapper longitudinally; the grooves are uniformly formed; a tapper angle alpha of the tapper body is between 1 to 3 degrees; the tapper body portion comprises a primary cutting portion and a finishing cutting portion; a 45-degree chamber C is arranged at the front end of the primary cutting portion; the front end diameter D1 is less than the major diameter; the length off the primary cutting portion and the length of the finishing cutting portion which are equal is equal to L1; the length L2 of a revising portion is 14 to 15 times of the thread pitch P; all the minor diameter d1 of the screw tapper is equal; the major diameter and the mean diameter are designed to be different; thread forms and the thread pitch of the finishing cutting portion, the primary cutting portion and the revising portion are consistent; a cylinder with the length to be in L4 is arranged between the primary cutting portion and the finishing cutting portion; the diameter of the cylinder is less than the minor diameter d1.
Description
technical field [0001] The invention relates to a mechanical tool, in particular to a composite screw tap for a machine. Background technique [0002] At present, with the continuous application of new materials in all walks of life, the processed materials have put forward higher and higher requirements for taps. When tapping, in order to reasonably distribute the cutting force, the cutting work is often assigned to several taps, and the use of single and group taps brings many difficulties to the processing, such as the need for multiple clamping and positioning, and the program is complicated. Contents of the invention [0003] In order to combine groups of taps into single taps, one-time clamping, and one-time cutting of internal threads, the invention provides a compound thread machine tap to solve the inconvenience caused by multiple or groups of taps. [0004] The exterior structure of the screw tap for compound thread machine of the present invention is as follows...
Claims
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IPC IPC(8): B23G5/06
Inventor 田冬英
Owner AVIC STANDARD PARTS MFG