Interchangeable thread cutting chasing tool
A thread cutting and interchangeable technology, which is applied to thread cutting auxiliary equipment, tangent devices, metal processing equipment, etc., can solve the problems of breakage, scrapping of combs, and difficulty in finding blades, so as to reduce processing costs and reduce waste. Effect
Inactive Publication Date: 2009-09-30
CHINA ACAD OF BUILDING RES +1
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Problems solved by technology
[0005] In the process of realizing the present invention, the inventor finds that the existing thread cutting comb has at least the following problems: since the distance S1 between the tip of the thread of the first blade of the thread cutting comb and the center line of the comb positioning groove is not limited, Therefore, the distances S1, S2, S3, and S4 between the corresponding tooth tips of the same number of blades of the same number of thread cutting combs processed by different pairs are generally different from each other, resulting in different pairs of combs. Knives of the same number cannot be used interchangeably
A large number of engineering statistics have proved that the damage of the thread comb cutter is mostly broken or broken by the thread teeth or the cutting edge of the tool, rather than normal wear and tear damage.
And as long as the existing straight thread comb cutter damages any one blade in a pair of cutters, this pair of comb cutter is promptly all scrapped, and can no longer be used, even if the remaining three blades of this pair of comb cutter are all intact, because it is difficult to find Blades interchangeable with damaged blades
This is a great waste for the use of cutting tools, and it also increases the processing cost of the straight thread head of the steel bar
Method used
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Embodiment Construction
[0016] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0017] figure 1 It is a schematic diagram of the tooth shape of the straight thread cutting comb of steel bar; Figure 2 to Figure 5 It is a schematic diagram of the appearance of four pieces of steel bar straight thread cutting combs. figure 1 Among them, P is the pitch, and H is the full tooth height. Figure 2 to Figure 5 1 is the centerline of the first complete tooth, 2 is the centerline of the positioning groove, and 3 is the positioning groove of the comb knife. At present, steel bar thread cutting generally adopts four common thread cutting combs, such as Figure 2 to Figure 5 As shown, each pair of combs includes four blades No. I, II, III, and IV, and the distance between the corresponding tooth tip of the thread of each blade and the previous blade and the centerline of the positioning groove of the comb differs by a quarter of the pitch. ...
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The present invention provides an interchangeable thread cutting chasing tool which comprises N chasing tool blades arranged sequentially, wherein the N is larger than or equal to 2. The distance from the corresponding tooth point of screw thread to the center line of positioning slot of chasing tool on each blade is different from that of former blade for 1 / N thread interval. The distance from the tooth point of a first whole tooth of screw thread of first blade in N chasing tool blades sequentially arranged to the distance of center line of positioning slot of chasing tool is a fixed value. The interchangeable thread cutting chasing tool provided by the invention causes that the same-number blade of thread chasing tool of different pair can be interchanged through setting the distance from the tooth point of first whole tooth of each chasing tool to the center line of positioning slot of chasing tool to a fixed value, thereby reducing the waste and reducing the processing cost of straight screw-threaded coupling of reinforcing steel.
Description
technical field [0001] The invention relates to a thread cutting comb, in particular to an interchangeable steel bar thread cutting comb. Background technique [0002] In the process of building construction, there are often a large number of steel bars that need to be connected. The traditional binding connection method is rarely used. Welding and straight thread mechanical connections are commonly used now. The welding method is affected by various factors such as welder level, welding raw materials, welding construction environment and weather, so it is difficult to guarantee the connection quality. Therefore, the straight thread mechanical connection method has been widely used in recent years. [0003] The mechanical connection of upsetting straight threads of steel bars is a main method in the mechanical connection of steel bars at present, and it is also a kind of mechanical connection of equal-strength steel bars. Equal-strength steel mechanical connection refers...
Claims
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Inventor 李智斌刘永颐吴广彬徐瑞榕吴晓星赵杰寿海钢
Owner CHINA ACAD OF BUILDING RES