JP2017144476A - Structure of jig of pipe bender (including all workpiece such as "round pipe, other pipe, plate material, different shape material" machined in bender) - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems in which a structure of a jig of a pipe bender with slip prevention means has square recessed grooves and square saw grooves engraved in a clamping face of the jig such as a bender clamp, and the square recessed grooves and the square saw grooves are slip prevention means of a pipe, and also the curve of the pipe is generated by the working of the slip prevention means and the bending accuracy can be secured, however the square grooves have perpendicular shapes and there is a risk of damaging the pipe, and the square grooves are easily worn and lacks durability.SOLUTION: A jig 1 of a pipe bender includes clamping faces 100, 101 for sandwiching an outer circumference curved surface of a pipe. The clamping faces have peaks and valleys projected from the faces. The pitches between the peaks and the valleys are formed by the same bend angle as the outer circumference curved surface of the pipe, and are formed on a radial line segment 5 from the focal point of the curve of the pipe toward the circumference of the pipe. The clamping faces achieve a slip prevention effect on the pipe, and the improvement of the bending accuracy of the pipe and the improvement of quality can be expected.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a structure of a jig for a pipe bender (for example, a round pipe).

  Conventionally, as a structure of a pipe bender jig provided with an anti-slip means, schematic diagrams shown in FIGS. 8A and 8B are known. A square recess groove engraved on a holding surface of a jig such as a vendor clamp shown in FIG. 8-1, and a square saw groove engraved on a jig such as a vendor clamp shown in FIG. There is. The square recess groove and the square saw groove (when collectively referred to as a square groove) are anti-slip means for the pipe, and the anti-slip means works to generate the bend of the pipe and ensure the bending accuracy. . However, since the square groove has a right-angled shape, there is a possibility that the pipe may be damaged, and the square groove is easily worn and lacks durability.

  In view of the above, as a prior document, Japanese Patent Laid-Open No. 2003-053433 (Document 1) discloses a clamp made of a flexible member. In the longitudinal direction (axial direction) of the inner surface of the clamp, a recessed groove is engraved in an annular direction, and the structure is intended to prevent slipping by the annular recessed groove and the characteristics (elastic deformation) of the material.

JP 2003-053433 A

  In Document 1, the clamp is made of a flexible member. Therefore, there is a problem in durability depending on the usage frequency and usage mode of the clamp, and improvement thereof is desired. Further, it is a chucking between the clamp and the pipe, and has a structure in which a recessed groove is formed in the longitudinal direction of the clamp. Therefore, since the clamp is made of a flexible material, the wedge effect between the right angle corner portion of the hollow and the pipe cannot be expected. Therefore, even if it is effective for preventing rotation in the circumferential direction or pulling out, it is not necessarily considered sufficient for the slip resistance in the axial direction of the pipe.

  In view of the above, according to the present invention, the clamping surface of the jig has a crest protruding from the surface and a trough at the same surface position as the surface, and the pitch between the crest and the trough is determined by the pipe. It is formed with the same curved angle as the outer peripheral curved surface (circumference). In other words, the pitch is set on the radial line segment from the focal point of the pipe to the circumference of the pipe (the pitch is In the structure formed in the shape similar to the line segment), it is possible to expect that the anti-slip effect on the pipe is achieved on the holding surface, the accuracy of bending of the pipe, and the quality are improved.

  In order to achieve the effect of the present invention, claims 1 to 7 are proposed.

The invention of claim 1 is a jig of a pipe vendor for chucking a pipe (for example, a round pipe).
The jig includes at least a clamping surface that clamps the outer peripheral curved surface of the pipe. The clamping surface has a peak protruding from the surface, and a valley at the same surface position as the surface. The pitch of the pipe is the same as the outer curved surface of the pipe and the structure of the pipe bender jig formed at the same bending angle, and the pitch between the crest and trough provided on the clamping surface is the same as the outer curved surface of the pipe. In other words, the pitch is formed on the radial segment from the focal point of the pipe bending (center of bending) to the circumference of the pipe. The anti-slip effect on the pipe can be achieved, the accuracy of bending of the pipe can be improved, and the quality can be improved. The clamping surface has a peak portion projecting from this surface (the clamping surface) and a valley portion at the same surface position as the surface, and the pipe is not damaged (a pinching mark is formed on the pipe). This pipe is characterized in that it can be curved at a predetermined angle.

  In the invention of claim 2, the pitch between the crest and the trough is formed at the same bending angle as that of the outer peripheral curved surface of the pipe, and the radial direction toward the converging direction of the crest and the trough This is a structure of a pipe bender jig provided with the line toward the focal point of the bending of the jig, and the effect of claim 1 and the achievement of the characteristics can be achieved. Moreover, the peak part and trough part which can anticipate the anti-slip | skid effect can be formed in a clamping surface.

  In the invention of claim 3, the jig is a pipe bender jig structure which is one of a bending foam, a vendor clamp, a clamp die, a wiper, or a pair of pipe clamps. Achieved. Moreover, the range of the jig | tool which can employ | adopt this invention can be specified.

  In the invention of claim 4, the radial line in the converging direction of the crests and troughs is the structure of the pipe bender jig formed toward the focal point of the outer peripheral curved surface for curved processing of the pipe. To achieve the effects and characteristics. Moreover, the structure of the peak part and trough part of this invention can be specified.

  The invention according to claim 5 is a pipe bender jig structure in which the height of the crest is 0.03 mm to 0.2 mm, preferably 0.05 mm to 0.1 mm. Achievement and achievement of characteristics. Moreover, the structure of the height of the peak part of this invention can be specified.

  In the invention of claim 6, the pitch is 0.5 mm to 2 mm, preferably 0.8 mm to 1 mm, and is a jig structure of a pipe bender. I can plan. Moreover, the numerical structure of the pitch of the present invention can be specified.

  In the invention of claim 7, the skirt from the peak to the valley is a circumferential locus, and the circumferential radius is R1.0 mm to R3.0 mm, preferably R1.5 mm to R2.5 mm. The structure of the pipe bender jig is as follows. The effect of claim 1 and the achievement of the characteristics can be achieved. Moreover, the structure of the downward locus | trajectory from the peak part of this invention to a trough part can be specified.

An enlarged overhead view of the vendor clamp Schematic diagram showing an enlarged structure of the mountain valley on the clamping surface The perspective view which showed the example which provided the valley part on each clamping surface of a pipe bender (bending form) and the clamp die which opposes this, respectively Sectional drawing of the state bent using the pipe bender and clamp die shown in FIG. Schematic diagram showing a part of the state of bending using the vendor clamp shown in FIG. The radial direction of each line segment that forms a peak portion projecting from the inner peripheral surface of the clamping surface provided in the curved shape of the fitting surface of the vendor clamp (main body) and a valley portion having the same surface position as the inner peripheral surface The focal point that is the converging part is the center point in the radial direction of the outer peripheral curved surface of the clamping surface, and the point (focal point) where the so-called mountain and valley line segments gather is the central point of the outer peripheral curved surface of the clamping surface. Schematic diagram It is an enlarged schematic diagram showing a square recess groove carved on a clamping surface of a conventional jig such as a vendor clamp. This square recess is likely to cause a corner defect, leading to a short life (hereinafter the same). Enlarged schematic diagram showing a square saw groove engraved on a jig such as a conventional vendor clamp.

  1 and 2 are part of the jig shown in FIG. 1 and are vendor clamps 1 and 1 (pipe clamps). The vendor clamps 1 are a pair of males and females, and the structure thereof is an opposing relationship. This will be explained on one side. The vendor clamps 1, 1 have clamping surfaces 100, 101 (surfaces having the same diameter as the pipe peripheral surface) for clamping the pipe on the inner surface. The clamping surfaces 100, 101 are one end face 1 a of the vendor clamps 1, 1. Is recessed toward the other end face 1b, and is a substantially 1/4 arc. The clamping surfaces 100 and 101 have an arc-shaped peak 2 projecting from the surface 1c and an arc-shaped valley 3 at the same surface position as the surface 1c. The arc-shaped curved surface of the mountain portion 2> the arc-shaped curved surface of the valley portion 3. The principle showing a line segment, which will be described later, formed in the radial direction of the arc of the peak portion 2 and the valley portion 3 is shown in FIG. 101 reaches the outer peripheral surfaces 100a and 101a (the outer peripheral curved surface W2 of the pipe W), and has a so-called radial direction. With this configuration, the crest 2 and the trough 3 are connected to the clamping surface 100 and the clamping surface 101, respectively, and the crest 2 and the trough 3 of the both clamping surfaces 100 and 101 are respectively outer peripheral surfaces. The inner peripheral surfaces 100b and 101b (inner peripheral curved surface W3 of the pipe W) are reached via 100a and 101a, and are formed in a spiral shape. The advantage of this configuration is that the pinching portion of the pipe W can be gripped at least in a spiral shape formed by the crests 2 without being damaged. Moreover, although not shown in figure, the peak part 2 and the trough part 3 are not limited to this spiral shape, but are diffusion shape (from the center C toward the outer peripheral surface 100a (101a) from the inner peripheral surface 100b (101b). A deformed spiral shape is also possible, which is a shape composed of a line segment 5 of a peak portion 2 and a valley portion 3 based on a coordinate axis facing the radial direction, and the same effect as the spiral shape can be expected. . A gentle biconcave base 200 (R surface) extending from the peak 2 to the valley 3 is formed, and the biconcave base 200 can receive a load applied to the peak 2. Thereby, there exists an advantage which the defect of the peak part 2 decreases, and there exists an actual benefit which can consider the effectiveness of leading to life extension. Further, the peak 2 and the valley 3 are characterized in that the shape of the pair of widths with respect to the basic line segment 5 is continuously maintained. It is effective in reducing the burden on the jig, reducing the burden on each jig, extending the life, and improving the quality and accuracy.

  The relationship between the peak 2 and the valley 3 on the clamping surfaces 100 and 101 is a continuous flow in a spiral shape or an irregular spiral shape in each figure. It is considered possible even in a relationship of opposite shape and irregular shape.

  A preferred example of the relationship between the peak portion 2 and the valley portion 3 and numerical values will be described. The pitch 6 between the peak portion 2 and the valley portion 3 is the same bending angle as the outer peripheral curved surface W2 and the inner peripheral curved surface W3 of the pipe W. And the radial line segment 5 (line) in the radial direction toward the converging direction of the valley portion 3 is formed by bending the one end surface 1a to the other end surface 1b of the vendor clamp 1. It is the structure provided toward the focal point. This bending is the same as the outer peripheral curved surface W2 and the inner peripheral curved surface W3 of the pipe W. Moreover, a preferable example of the numerical value is shown in FIG. 2, and the pitch 6 is 0.5 mm to 2 mm, preferably 0.8 mm to 1 mm. The height of the peak portion 2 is 0.03 mm to 0.2 mm, preferably 0.05 mm to 0.1 mm. The circumferential radius of the arc-shaped curved surface of the crest 2 is smaller than the circumferential radius of the arc-shaped curved surface of the trough 3. Although the peak part 2 is provided with a curved surface (arc top face), it has an extremely triangular shape and a circumferential radius of R0.1 to R1.0, preferably R0.05 to R0.6. . Further, the curved surface (the R surface, the skirt portion 200 formed between the ridges 2) from the ridge 2 to the valley 3 has a circumferential radius of R1.0 to R3.0, and preferably R1.5 to R2.5. And the trough part 3 is made into the same surface position as the outer peripheral surfaces 100a and 101a of the clamping surfaces 100 and 101, or its inner peripheral surfaces 100b and 101b (surface of the same diameter as a pipe peripheral surface). Each numerical value is appropriately selected depending on the diameter of the pipe W, the bent portion W1, or the material. As an example, when considering the pitch 6, the case where the pipe W is large and / or the bending angle is small is large, and conversely, the case where the pipe W is small and / or the bending angle is large is small. It is possible to do. Other numerical reasons are considered to be the same. Thus, since the peak part 2 is not a triangle shape, it is an arc shape to the last, and the trough part 3 is a curved surface, Therefore The bending part W1 can be processed without leaving a trace in the surrounding surface of the pipe W. There are features.

  A crest 2 and a trough 3 are formed on the curved surface portion 1000 and the confronting portion 1001 (collectively, the clamping surface 101) of the pipe bender 10 (jig) shown in FIGS. 3 and 4-1. Then, a crest 2 and a trough 3 are formed on the clamping surface 100 (of the facing portion) of the clamp die 12 (jig) facing the pipe bender 10. The crest 2 and the trough 3 are formed on the clamping surfaces 101 and 100 of the pipe bender 10 and the clamp die 12, and the idea is that the crest 2 and the trough 3 of the above-described bender clamps 1 and 1 According to the idea. In this example, as shown in FIG. 4A, in the straight state of the pipe W, a portion that is near the tip of the bent portion W1 after the processing is defined as a crest portion 1001 of the pipe bender 10 and a crest portion of the confronting portion of the clamp die 12. The one surface side of the bent portion W1 sandwiched between the portion 2 and the trough portion 3 is attached to the crest portion 2 and the trough portion 3 of the curved surface portion 1000 of the pipe bender 10. Then, the pipe bender 10 is rotated and the clamp die 12 is moved, and the pipe W is processed through advancement of a pressure die 13 and a clamp die / wiper 15 which will be described later, and advancement of a mandrel (not shown). Then, the bent portion W1 is processed. In the same figure, if necessary, the pressure die 13 (jig) and the clamp die / wiper 15 (jig) are also provided on the clamping surfaces 100 and 101 of the jig with the ridges 2 in the same manner as the vendor clamps 1 and 1. And the valley 3 are formed in accordance with the concept of the peak 2 and valley 3 of the vendor clamps 1 and 1 described above. Further, the relationship between the crest 2 and the trough 3 in the facing portion such as the pressure die 13 and the clamp die / wiper 15 is a continuous flow of the spiral shape or the irregular spiral shape described above. It is also possible to have a relationship of similar shape, or a relationship of opposite shape and irregular shape.

  As shown in FIG. 4B, as an example of use of the vendor clamps 1 and 1, the pipe W in the pipe bender 10 is used as a kind of jig for clamping the already bent portion W1. The bent portion W1 is securely clamped between the crests 2 and the troughs 3 provided on the clamping surfaces 100 and 101, and the speed and reliability of processing in the pipe bender 10 are achieved while ensuring the quality. To improve. The use of the vendor clamps 1 and 1 is an example and is not limited.

In addition, although not shown, as another example of using the vendor clamps 1 and 1, the pipe W in the pipe bender 10 is used as a kind of jig for clamping a plurality of already processed bent portions. The plurality of bent portions are reliably chucked by the crests 2 and the troughs 3 provided on the clamping surfaces 100 and 101, and the processing of the pipe bender 10 can be performed quickly and reliably. Secure and improve. The use of the vendor clamps 1 and 1 is an example and is not limited.
Furthermore, it can be used for bending forms.

  Each of the embodiments described above shows preferable examples, and other structures and means having similar effects and features are within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Vendor clamp 100 Clamping surface 100a Outer peripheral surface 100b Inner peripheral surface 101 Holding surface 101a Outer peripheral surface 101b Inner peripheral surface 1a One end surface 1b The other end surface 1c Surface 2 Mountain part 200 Bottom part 3 Valley part 5 Line segment 6 Pitch 10 Pipe bender 1000 Curved surface Part 1001 Confronting part 12 Clamp die 13 Pressure die 15 Clamp die and wiper C Center W Pipe W1 Curved part

Claims (7)

In pipe vendor jigs that chuck pipes,
The jig includes at least a clamping surface that clamps the outer peripheral curved surface of the pipe. The clamping surface has a peak portion protruding from the surface, and a valley portion at the same surface position as the surface. The pitch of the crests and troughs is the structure of a pipe bender jig that is formed with the same curved angle as the outer peripheral curved surface of the pipe.   The pitch between the crest and trough is formed at the same bending angle as the outer peripheral curved surface of the pipe, and the apex of the crest and the radial line toward the converging direction of the trough, The structure of the jig of the pipe bender according to claim 1, wherein the structure is provided toward the focal point of the bending of the jig.   2. The pipe bender jig structure according to claim 1, wherein the jig is one of a bending foam, a bender clamp, a clamp die, a wiper, and a pair of pipe clamps.   2. The pipe bender jig structure according to claim 1, wherein the converging radial lines of the crests and troughs are formed toward the focal point of the outer peripheral curved surface for processing the curved surface of the pipe.   The pipe bender jig structure according to claim 1, wherein the height of the peak portion is 0.03 mm to 0.2 mm, preferably 0.05 mm to 0.1 mm.   The pipe vendor jig structure according to claim 1, wherein the pitch is 0.5 mm to 2 mm, preferably 0.8 mm to 1 mm.   The base part from the peak part to the valley part is a circumferential locus, and the circumference radius is R1.0 mm to R3.0 mm, preferably R1.5 mm to R2.5 mm The structure of the jig of the pipe bender according to claim 1.