JP2005088173A - Chamfering tool of pipe end - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chamfering tool of a pipe end capable of effectively and uniformly chamfering an end part of a machined pipe without depending on technique of a worker and enhancing machining accuracy. <P>SOLUTION: The chamfering tool 1 has a plurality of pipe inserting holes 12, whose one side is opened, formed in a substantially cylindrical shape on a holder 11 for holding the machined pipe 2. A guide base part 13 having a prescribed diameter corresponding to an inner diameter of the machined pipe 2 is provided at the center of the inside of the pipe inserting holes 12. The respective pipe inserting holes and guide base part are formed in dimensions corresponding to different pipe diameters. The end part of the machined pipe 2 is chamfered while plural blade plates 14 are provided in a truncated cone or an inverted truncated cone from the guide base part 13 to a bottom part of the pipe inserting holes 12. The holder 11 supports an outer peripheral surface of the machined pipe 2, and a minimum diameter of the machined pipe 2 for inserting the guide base part 13 to the pipe inserting holes 12 is regulated. Chamfering is performed while the machined pipe 2 is held. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a chamfering jig for chamfering an end portion of a pipe.

  In piping work, when a pipe to be processed such as a synthetic resin pipe is cut to a required length at a work site, the end of the cut surface may need to be chamfered. Conventionally, chamfering on the inner diameter side of the end of the pipe to be processed has been performed by a file, a chamfering reamer or the like. The chamfering reamer is provided with a plurality of blade plates in a conical shape, and these blade plates are rotated to chamfer the inner diameter side of the tube to be processed.

  However, the chamfering process using the file, the chamfering reamer, etc. is performed little by little in the circumferential direction at the end of the pipe to be processed, so it takes time and labor. Since it is adjusted by force adjustment or visual observation, the processing accuracy would vary.

Therefore, for example, a chamfering jig as disclosed in Patent Document 1 has been proposed. In this chamfering jig, a plurality of blade plates are joined together at an inner end to form a blade plate assembly, and the blade plate assembly is provided in a cylindrical outer casing made of synthetic resin. The outer casing is formed of a synthetic resin into a cylindrical shape whose both ends are open, and the outer end of the blade plate is joined to the inner wall surface of the outer casing. The cut pipe to be machined is configured to be chamfered by inserting its end into the outer casing, applying the pipe edge to the blade plate, and rotating the outer casing in the circumferential direction. .
JP 2001-179537 A

  The illustrated chamfering jig described in Patent Document 1 has higher work efficiency than manual chamfering using a file or the like, but the work tube is inserted obliquely with respect to the outer casing. It is impossible to prevent the cut surface from shaking during processing. For this reason, the edge part of a to-be-processed pipe | tube does not contact equally with respect to several blade plates, and it becomes impossible to chamfer uniformly. If the chamfering process is not performed uniformly, it is difficult to insert the work pipe into the joint in the piping work, and the work cannot be performed quickly. Also, the work pipe is not attached to a water stop material such as an O-ring provided in the joint. There is also a possibility that the water-stopping material may be damaged by, for example, hooking the end portion of the, and the water-stopping performance may be deteriorated.

  In view of the circumstances as described above, the present invention provides a pipe end chamfering jig capable of chamfering the end of the pipe to be processed efficiently and uniformly regardless of the skill of the operator, thereby improving the processing accuracy. The purpose is to do.

  In order to solve the above-described problems, a pipe end chamfering jig according to the present invention includes a holder for holding a pipe to be processed and a blade plate for chamfering the end of the pipe to be processed. The holder has a tube insertion hole formed in a substantially cylindrical shape with one opening, and a guide base having a predetermined diameter corresponding to the inner diameter of the tube to be processed is provided at the inner center of the tube insertion hole. A plurality of blade plates are provided in a truncated cone shape or an inverted truncated cone shape from the guide base portion to the bottom portion of the tube insertion hole. Then, the holder supports the outer peripheral surface of the pipe to be processed, the guide base defines the minimum diameter of the pipe to be processed that can be inserted into the pipe insertion hole, and chamfering is performed while holding the pipe to be processed. It is a feature.

  According to this invention, the work tube is inserted between the tube insertion hole formed according to the outer diameter of the work tube and the guide base formed with the diameter according to the inner diameter of the work tube. Since the work tube is held from both the outside and inside of the work tube, the work tube does not wobble or tilt during processing, and the pipe end is applied to the blade plate appropriately and evenly. Can do. Therefore, the end portion of the tube to be processed is uniformly chamfered and can be finished with high accuracy.

  Further, in the pipe end chamfering jig according to the present invention, the holder is provided with a plurality of pipe insertion holes having dimensions corresponding to the pipes to be processed having different pipe diameters, and the inner center of each of the pipe insertion holes. Is provided with a guide base having a predetermined diameter corresponding to the inner diameter of the pipe to be processed.

  According to this, since the holder is provided with a plurality of tube insertion holes and guide bases according to a plurality of types of tube diameters of the tube to be processed, the tube insertion hole that matches the size of the tube to be chamfered Chamfering can be performed by inserting a pipe to be processed into a jig corresponding to a multi-size pipe diameter.

  Further, according to the present invention, in the above-described chamfering jig at the pipe end, a shaving removal hole for removing the shavings of the pipe to be machined is provided on the side portion of the pipe insertion hole of the holder. It is characterized by.

  As a result, it is possible to remove the shavings of the workpiece pipe generated by the chamfering process by discharging the shavings from the pipe insertion hole through the shaving removal hole.

  According to the pipe end chamfering jig according to the present invention, the pipe to be processed inserted into the pipe insertion hole is stably held by the inner peripheral surface of the pipe insertion hole corresponding to the pipe diameter of the pipe to be processed and the guide base. Therefore, the tube to be processed is prevented from wobbling or tilting during processing, and the end of the tube to be processed can be uniformly chamfered.

  In the chamfering jig of the present invention, since the tube insertion hole of the holder is formed corresponding to the tube diameter of the tube to be processed, the tube to be processed is inserted into the tube insertion hole in order to perform the chamfering process. Then, it is only necessary to rotate the holder while pressing it against the pipe to be processed, and anyone can perform chamfering with high accuracy by a simple operation.

  Further, by providing a plurality of such tube insertion holes in the holder, it becomes possible to chamfer a plurality of types of processed pipes uniformly and appropriately with a single chamfering jig, thereby improving versatility. .

  The best mode for carrying out a pipe end chamfering jig according to the present invention will be described below with reference to the drawings.

  First, Example 1 of the chamfering jig according to the present invention will be described.

  1 to 5 show a first embodiment of a chamfering jig according to the present invention, FIG. 1 is a cross-sectional view of a pipe end chamfering jig, FIG. 2 is a side view of FIG. 1, and FIG. FIG. 4 is a perspective view showing a chamfering process, and FIG. 5 is a cross-sectional view showing a chamfering process.

  The chamfering jig 1 includes a holder 11 that holds the processed pipe 2 and a blade plate 14 that chamfers the end of the processed pipe 2.

  The holder 11 is formed in a block shape, and is provided with tube insertion holes 12 in four directions on the side surfaces. The tube insertion hole 12 is formed in a substantially cylindrical shape and opens on one side surface of the holder 11. In the illustrated embodiment, the tube insertion holes 12 are provided corresponding to four types of tube diameters of nominal sizes 10A, 13A, 16A, and 20A, and the inner diameter of the tube can be inserted into the processed tube 2 having such tube diameters. It is formed with.

  A guide base portion 13 is provided at the inner center of each tube insertion hole 12. The guide base 13 has a predetermined diameter corresponding to the inner diameter of the tube 2 to be processed, and is formed in a substantially cylindrical shape. That is, these guide bases 13 are also formed in dimensions corresponding to the processed pipes 2 having different nominal dimensions of 10A, 13A, 16A, and 20A, similar to the pipe insertion holes 12, and can be inserted into the pipe insertion holes 12. The minimum diameter of the processing tube 2 is defined. Each guide base 13 is pivotally supported in the center direction of the holder 11 in the tube insertion hole 12.

  Inside the tube insertion hole 12, four blade plates 14 are provided in a truncated cone shape from the guide base 13 to the bottom of the tube insertion hole 12. The cutting edges of these blade plates 14 are provided so as to form a predetermined chamfering angle with respect to the bottom of the tube insertion hole 12, and are set to an angle of approximately 45 ° in the illustrated embodiment. The base part of the blade plate 14 is inserted into a fixing hole 121 provided in the bottom part of the tube insertion hole 12, is evenly arranged, and is fixed by the guide base part 13.

  As shown in FIGS. 3 and 4, in order to chamfer the processed tube 2, a tube insertion hole 12 corresponding to the tube diameter of the processed tube 2 is selected and performed. The tube 2 to be processed is inserted between a tube insertion hole 12 having an inner diameter corresponding to the outer diameter of the tube and a guide base 13 corresponding to the inner diameter of the tube 2 to be processed. The bottom of the tube insertion hole 12 comes into contact with the end of the inserted tube 2 to be processed and serves as a stopper. Then, by rotating the holder 11 in the direction of the arrow B while pressing the holder 11 against the work tube 2, the blade plate 14 comes into contact with the inner end of the work tube 2 and is uniformly shaved in the circumferential direction to be chamfered. Can be applied.

  The chamfering jig 1 is configured to chamfer the inner end surface of the tube 2 to be processed. However, when it is necessary to chamfer the outer end portion of the tube 2 to be processed, the following chamfering jig is used. Is suitable.

  In this case, as shown in FIG. 6, the chamfering jig 1 is provided with four blade plates 14 in an inverted frustoconical shape from the guide base 13 to the bottom of the tube insertion hole 12. The cutting edges of these blade plates 14 are provided at a predetermined chamfering angle with respect to the bottom of the tube insertion hole 12, and an angle of about 45 ° is preferable. Also in this case, in order to chamfer the tube 2 to be processed, it is only necessary to insert it into the tube insertion hole 12 corresponding to the tube diameter of the tube 2 to be processed. By rotating the holder 11 while pressing it against the tube 2 to be processed. The chamfering process can be performed with the blade plate 14 in contact with the outer end of the tube 2 to be processed.

  Next, a second embodiment of the chamfering jig according to the present invention will be described.

  The chamfering jig 1 according to the second embodiment is characterized in that a shaving removal hole 15 for removing shavings generated by chamfering the processed pipe 2 from the tube insertion hole 12 is provided. Therefore, in the following description, a configuration peculiar to the second embodiment will be described in detail, and parts having the same configuration as in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  FIG. 7 is a sectional view showing a second embodiment of the chamfering jig according to the present invention, and FIG. 8 is a side view of the chamfering jig shown in FIG.

  In the illustrated embodiment, the shaving removal hole 15 of the chamfering jig 1 is provided in a long hole shape on each side of the tube insertion hole 12 on the side surface of the holder 11. For example, in the tube insertion hole 12 having a tube diameter of 20A, each shaving removal hole 15 appearing on the side surface of the holder 11 goes straight through the holder 11 and is provided on the side surface of the adjacent holder 11. It is formed so as to reach the bottom of each tube insertion hole 12 of 10A and tube diameter 13A.

  Similarly, each shaving removal hole 15 provided on both sides of the tube insertion hole 12 having a tube diameter of 10A has a tube diameter of 16A and a tube diameter of 20A provided on the side surface of the adjacent holder 11 from the side surface of the holder. It is formed so as to reach the bottom of each tube insertion hole 12. Each of these shavings removal holes 15 is formed so as to communicate with one tube insertion hole 12 from two directions to the bottom.

  Then, as shown in FIG. 7, inside the holder 11, each of these shavings removal holes 15 intersects with each other to connect the bottom of each tube insertion hole 12 and the side surface of the holder 11. Yes.

  As a result, after chamfering the processed tube 2, the processed tube 2 is extracted, and the holder 11 is rotated about 45 ° in the same manner as in the processing, so that the cutting powder of the processed tube 2 is inserted into the tube insertion hole 12. Can be discharged through the shavings removal hole 15 and removed.

  As described above, the chamfering jig 1 according to the present invention has four pipe insertion holes 12 formed in the holder 11 corresponding to the pipe diameter of the pipe 2 to be processed. The outer peripheral surface of the work tube 2 inserted into the insertion hole 12 is supported by the inner peripheral surface of the tube insertion hole 12 of the holder 11. Further, the minimum diameter of the tube 2 to be processed that can be inserted into each tube insertion hole 12 of the holder 11 is defined by the guide base 13. Accordingly, since the inserted tube 2 to be processed is properly held in the tube axis direction, the tube 2 to be processed is prevented from wobbling or tilting during processing, and the end of the tube 2 to be processed can be made uniform. Can be chamfered. In addition, such a single chamfering jig 1 can cope with the sizes of the four types of processed pipes 2 and each can be chamfered uniformly and appropriately. It is not necessary to prepare a plurality of jigs according to the above.

It is sectional drawing which shows Example 1 of the chamfering jig | tool which concerns on this invention. It is a side view of FIG. It is a perspective view which shows the place which inserts a to-be-processed pipe | tube in the chamfering jig of this invention. It is a perspective view which shows the place which chamfers with a chamfering jig of this invention. FIG. 5 is a cross-sectional view of FIG. 4. It is sectional drawing which shows the chamfering jig which concerns on this invention. It is sectional drawing which shows Example 2 of the chamfering jig | tool which concerns on this invention. FIG. 8 is a side view of FIG. 7.

Explanation of symbols

1 Chamfering jig 11 Holder 12 Pipe insertion hole 13 Guide base 14 Blade plate 2 Pipe to be processed

Claims (3)

A tube end chamfering jig comprising a holder for holding a tube to be processed and a blade plate for chamfering the end of the tube to be processed,
The holder has a tube insertion hole formed in a substantially cylindrical shape with one opening, and a guide base having a predetermined diameter corresponding to the inner diameter of the tube to be processed is provided at the inner center of the tube insertion hole. A plurality of blade plates are provided in a truncated cone shape or an inverted truncated cone shape from this guide base to the bottom of the tube insertion hole,
The holder supports the outer peripheral surface of the work tube, the guide base defines the minimum diameter of the work tube that can be inserted into the tube insertion hole, and performs chamfering while holding the work tube. Pipe end chamfering jig. The holder is provided with a plurality of tube insertion holes having dimensions corresponding to the pipes to be processed having different pipe diameters, and a predetermined diameter corresponding to the inner diameter of the pipe to be processed is provided at the inner center of each of the pipe insertion holes. The tube end chamfering jig according to claim 1, further comprising a guide base portion having a guide. The chamfering of the pipe end according to claim 1 or 2, wherein a shaving removal hole for removing the cutting powder of the chamfered pipe is provided on a side portion of the pipe insertion hole of the holder. jig.

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