JP2014024141A - Apparatus for peeling fiber reinforced resin layer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for peeling a fiber reinforced resin layer capable of rapidly and securely obtaining a satisfactory cut surface without requiring a skill when a coating layer of a fiber reinforced resin tube is peeled.SOLUTION: There is provided an apparatus for peeling a fiber reinforced resin layer of a fiber reinforced tube which comprises: a clamp mechanism 2 for fixing a fiber reinforced resin tube 7 by grasping it from the outside; a center positioning tool 21 for fixing the fiber reinforced resin tube 7 from the inside; at least one set of coarse cutting tools 33 and a finish cutting tool 34; a cutting tool fixing part 31 in which the cutting tools 33 and 34 can be radially disposed around a shaft center of the fiber reinforced resin tube 7; a pressing mechanism 23 for pressing the center positioning tool 21 to the fiber reinforced resin tube 7; a drive mechanism 4 for rotating the clamp mechanism 2 or the cutting tool fixing part 31; and a moving mechanism 5 for moving the cutting tool fixing part 31 along the tube axis direction, in which a step is provided so that a blade edge of the coarse cutting tool 33 is positioned more adjacent to the end surface of a coating layer 75 by 0.5 to 1.0 mm than a blade edge of the finish cutting tool 34.

Description

  The present invention relates to an apparatus for peeling a coating layer of a fiber reinforced resin pipe coated with a reinforcing fiber layer and the like, and more particularly to an apparatus for cutting and peeling a coating layer by rotating a work (pipe to be peeled) or a cutting tool. .

  Conventionally, fiber reinforced resin pipes 7 as shown in FIG. 8 are frequently used as pipes used in chemical pipelines such as steel manufacturing, chemical factories, and semiconductor factories, aquariums, water supply facilities, water purification facilities and wastewater treatment facilities. Yes. This fiber reinforced resin tube 7 has excellent chemical resistance, mechanical strength and heat resistance, has a low coefficient of linear expansion (1/2 of PVC), and is a complete insulator, so there is no risk of external corrosion or electrolytic corrosion. It is an excellent piping member with light weight (1/5 of cast iron pipe). The structure of the fiber reinforced resin pipe 7 is composed of a mother pipe material 71 made of vinyl chloride resin, chlorinated vinyl chloride resin, polyethylene resin, polypropylene resin, or the like, a surface treatment portion 72, a primer 73, and a polyester resin impregnated glass fiber. This pipe is covered with a covering layer 76 composed of a reinforcing fiber layer 74 and a surface finishing layer 75 subjected to a surface treatment with a corrosion-resistant resin.

  Therefore, when the fiber reinforced resin pipe 7 and the joint are bonded and connected, first, the coating layer 76 is peeled off by a desired length, and then an adhesive is applied to the exposed surface of the mother pipe material 71 to form the joint or the like. Adhere with. Conventionally, the peeling operation is performed by, for example, making a helical saw cut along a marking line of the peeling dimension, heating with a gas burner or the like to soften the coating layer 76, and then jumping the softened coating layer 76 with a screwdriver or the like. Waking up, pinching with pliers, etc., is done manually and requires skill.

  Furthermore, inadequate adhesion with a joint or the like causes water leakage after the pipe construction, and therefore, in the pipe construction, it is required to remove all the covering layer 76 on the surface of the peeling portion. For this reason, it takes time and effort to treat the residue adhering to the surface of the mother pipe 71 after the coating layer 76 is peeled off with sandpaper or fine file.

  Thus, as an apparatus for performing the peeling operation of the surface coating layer of the pipe as described above, a coating layer peeling apparatus for a plastic-coated steel pipe such as a gas pipe has been proposed (see Patent Document 1). However, the apparatus described in Patent Document 1 has a problem that the finished surface becomes non-uniform because the peel amount varies depending on the state of the coating layer. Further, since the thickness of the coating changes according to the size of the pipe diameter, a skilled engineer is required to use the apparatus.

  On the other hand, in metal cutting, in order to improve the finished state of the cut surface, the material to be cut is fed at a predetermined speed, and the finished cutting tool is set to a ratio between the feed speed of the roughing tool and the total number of cutting tools. According to this, a cutting apparatus has been proposed that generates chips with different cross-sectional shapes, has good chip compression moldability, and can perform good finished cutting without being affected by rough cutting tools (patent) Reference 2).

Japanese Utility Model Publication No. 61-127901 Japanese Utility Model Publication No. 63-100102

  Each of the above-mentioned conventional apparatuses mechanically cuts the coating material using a lathe mechanism, and gradually cuts the coating layer while pressing the cutting tool against the coating layer continuously to peel the coating layer. However, it is difficult to sufficiently cut the glass fiber used for the coating layer of the fiber reinforced resin tube depending on the depth of cut (depth) from the surface, and it is possible to remove all the coating layer from the peeled surface. However, the present situation is that the peeling operation of the coating layer is still performed manually by a skilled worker.

  The present invention has been made in view of the problems of the prior art as described above, and can reduce the labor of an operator during the stripping operation of the fiber reinforced resin tube, and can be performed quickly and without skill. It is an object of the present invention to provide a fiber reinforced resin layer peeling apparatus that reliably removes a uniform peeling layer and that can safely perform a coating layer peeling operation.

  For this reason, the present invention includes at least one clamping mechanism that holds and fixes a fiber reinforced resin tube covered with a coating layer including a fiber reinforced resin layer from the outside, a center positioning tool that fixes the fiber reinforced resin tube from the inside, and the like. A pair of roughing cutting tools and finishing cutting tools, and a cutting tool fixing portion in which these cutting tools can be arranged radially about the axis of the fiber-reinforced resin tube, and the center positioning tool is used as the fiber. In a fiber reinforced resin layer peeling apparatus comprising: a pressing mechanism that presses against a reinforced resin tube; a drive mechanism that rotates the clamp mechanism or the bite fixing portion; and a moving mechanism that moves the bite fixing portion along the tube axis direction. The first feature is that a step is provided so that the cutting edge of the roughing cutting tool is positioned 0.5 to 1.0 mm closer to the end face of the coating layer than the cutting edge of the finishing cutting tool. To. Further, a second feature is that the rough cutting tool is set to a cutting depth at which 30 to 50% of the coating layer is cut. Furthermore, the third feature is that the thickness cut by the rough cutting tool is 30 to 50% of the coating layer of the fiber-reinforced resin pipe.

The present invention has the following excellent effects.
(1) Since a clamp mechanism for grasping and fixing the fiber reinforced resin tube from the outside and a center positioning tool for fixing the fiber reinforced resin tube from the inside are provided, the tube can be easily centered and can be peeled off without unevenness.
(2) Since the rough cutting tool and the finishing tool can be easily positioned, a good cutting surface (adhesion) can be obtained quickly and surely without the need for skill when peeling the fiber reinforced resin layer of the fiber reinforced resin pipe. Surface).
(3) Since no excessive cuts or rough scratches remain on the peeled surface, the quality of adhesion is stabilized.

It is a perspective view which shows 1st embodiment of the fiber reinforced resin layer peeling apparatus which concerns on this invention. BRIEF DESCRIPTION OF THE DRAWINGS (a) which shows the use condition of the fiber reinforced resin layer peeling apparatus which concerns on 1st embodiment of this invention is a side view, (b) is a top view. FIG. 3 is a cross-sectional view of the main part taken along line AA in FIG. It is a principal part front view of a fiber reinforced resin peeling part. It is a principal part side view of a fiber reinforced resin peeling part. It is a perspective view which shows 2nd embodiment of the fiber reinforced resin layer peeling apparatus which concerns on this invention. It is an enlarged plan view showing a bite feeding mechanism according to a second embodiment. It is a partially broken perspective view which shows the coating structure of a fiber reinforced resin pipe.

[First embodiment]
Hereinafter, with reference to FIGS. 1-5, 1st embodiment of the fiber reinforced resin layer peeling apparatus 1 by this invention is described.

  As shown in FIGS. 1, 2 and 8, the fiber reinforced resin layer peeling apparatus 1 according to the present embodiment includes a tube fixing mechanism 2 for holding a fiber reinforced resin tube 7 which is a material to be cut, and a fiber reinforced resin tube. A coating layer grinding machine 3 (hereinafter simply referred to as a grinding machine 3) having a roughing cutting tool 33 and a finishing cutting tool 34 for cutting the coating layer 76, a driving mechanism 4 for rotating the grinding machine 3, and a drive The mechanism 4 includes a feed mechanism 5 of a rotating cylinder 43 provided so as to be able to advance and retreat in the tube axis direction, and a gantry 8 on which these components are placed.

  As shown in FIG. 2, the tube fixing mechanism 2 includes a clamp portion 22 that fixes the fiber reinforced resin tube 7 from the outside, and a center positioning tool 21 that is inserted into the opening end portion of the fiber reinforced resin tube 7. The reinforced resin tube 7 can be centered and fixed reliably from inside and outside.

  The clamp portion 22 includes a circular window 223 formed to have a size capable of inserting the fiber reinforced resin tube 7 and three clampers 221 provided at equal intervals on the inner peripheral surface of the window 223. By rotating the handle 222, the outer peripheral surface of the inserted fiber reinforced resin tube 7 can be fastened and fixed.

  The center positioning tool 21 is a cylindrical body having a substantially conical head portion 21a whose diameter is reduced toward the distal end side, and a bolt or the like is attached to the distal end side of the centering shaft 24 so that it can be exchanged according to different tube diameters. Removably attached. A push screw grip 23 is connected to the rear end side of the centering shaft 24. By rotating the push screw grip 23, the centering shaft 24 is pressed and moves along the tube axis direction. Then, the fiber reinforced resin pipe 7 inserted into the center positioning tool 21 is also moved, and the center axis of the center positioning tool 21 and the pipe axis can be matched.

As shown in FIGS. 1 and 2, the drive mechanism 4 is composed of a rotating cylinder 43 that rotates from a motor 41 via a drive belt 42. The rotating cylinder 43 is connected and fixed to an annular grinder 3 fitted with a roughing cutting tool 33 and a finishing cutting tool 34 at the end of the center positioning tool 21 and fastened with bolts. Then, while rotating the rotating cylinder 43, the drive mechanism 4 is advanced in the tube axis direction,
The coating layer 76 of the fiber reinforced resin tube 7 inserted into the center positioning tool 21 can be cut and peeled off. The rotating cylinder 43 may have a hollow portion through which the centering shaft 24 can be inserted, and may have a structure that rotates when the rotation of the motor 41 is transmitted. You may make it connect via the deceleration mechanism etc. which combined the gearwheel.

  The feed mechanism 5 of the rotating cylinder 43 uses a rack and pinion mechanism that is a combination of a rack gear 514 and a pinion gear 513. The feed mechanism 5 of the rotating cylinder 43 is fixed with a pinion gear 513 that meshes with a rack gear 514, and a handle 51 is attached to a shaft 511 that is supported by the gantry 8 via a bearing 512. The rotating cylinder 43 can be moved forwards and backwards at a speed to perform. Here, the rack gear 514 is attached to the bottom surface of the mounting table 53 on which the motor 41 and the rotating cylinder 43 are mounted, and the mounting table 53 is a recess that fits into a pair of slide rails 52 protruding from the frame 8. The strip 53a is provided and slides back and forth on the gantry 8 without swinging left and right. In addition, a stopper 6 made of urethane rubber that restricts excessive movement of the mounting table 53 is provided so that an excessive feeding distance can be prevented. That is, unnecessary cutting due to an operation error of the handle 51 or the like can be prevented.

  As shown in FIGS. 4 and 5, the grinding machine 3 is provided with a pair of cutting tool fixing portions 31 facing each other along the radial direction, and cutting tool exchangeable cutting tools 33 and 34 are provided on these cutting tool fixing portions 31. Each is fixed. One of the cutting tools 33 and 34 is a roughing cutting tool 33 and the other is a finishing cutting tool 34, and tips 33a and 34a are attached to the tips. The bytes 33 and 34 to be used are preferably, for example, Tungaloy JSCLCR1010H6 (product name), and the chips 33a and 34a are preferably CCGW060204 (product name).

  The grinder 3 is firmly connected to the rotating cylinder 43 by bolting. The grinder 3 is rotated following the rotation of the rotating cylinder 43, and the rotating grinder 3 is connected to the clamp portion 22 and the center positioning tool. By proceeding at a feed rate F toward the fiber reinforced resin tube 7 fixed by 21, the roughing cutting tool 33 and the finishing cutting tool 34 are sequentially cut and peeled off from the coating layer 76. Here, a step is set so that the cutting edge of the roughing cutting tool 33 is positioned closer to the surface of the coating layer 76 than the cutting edge of the finishing cutting tool 34. The cutting edge of the tip 33a of the cutting tool 33 comes into contact and rough cuts, and then the cutting edge of the tip 34a of the finishing cutting tool 34 comes into contact and cuts.

  As shown in FIG. 5, the separation distance A between the tip 33a of the roughing cutting tool 33 and the tube axis L, and the separation distance B between the tip 34a of the finishing cutting tool 34 and the tube axis L are A> B. Is set. Therefore, after the rough cutting bit 33 is cut, the finish cutting bit 34 is cut deeper, and the entire layer of the coating layer 76 is finish cut. In this way, the coating layer 76 is cut and peeled from the mother pipe material 71 of the fiber reinforced resin pipe 7.

  Here, by changing the level difference between the cutting edge of the roughing cutting tool 33 and the cutting edge of the finishing cutting tool 34, the finished state of the cutting portion and the peeled surface also changes. Therefore, in order to obtain a step difference of the cutting edge suitable for cutting the fiber reinforced resin pipe 7 (hereinafter referred to as a step setting value C of the cutting edge), first, the minimum necessary for the roughing blade to cut ahead of the finishing cutting blade. Of the cutting edge (hereinafter referred to as a limit cutting edge step D). This limit edge level difference D was set to a value satisfying the following formula.

さらに上記式の送り速度Ｆを約１．０〜１．５ｍｍ／秒、回転数Ｅを１２０ｒｐｍ、刃先間の角度Ｇを１８０°とし、配管口径別に限界刃先段差Ｄを求めた値を表１に示す。

Further, Table 1 shows the values obtained for the critical cutting edge step D for each pipe diameter with the feed rate F of the above formula being about 1.0 to 1.5 mm / second, the rotational speed E being 120 rpm, the angle G between the cutting edges being 180 °. Show.

  As can be seen from Table 1, when the tube diameter is 25 to 100 mm, the critical cutting edge step D is 0.26 to 0.34 mm. In actual work, the operator manually operates the handle 51 while confirming the cutting state of the fiber reinforced resin tube 7, so it is difficult to make the feed speed F constant as shown in Table 1. In addition, since the actual feed speed F is predicted to be faster than the feed speed F in Table 1, a suitable cutting edge level setting value C is set to 0.5 to 1. It was set to 0 mm. Thus, a step is provided so that the cutting edge of the roughing cutting tool 33 is closer to the end face of the coating layer 76 of the fiber reinforced resin pipe 7 than the cutting edge of the finishing cutting tool 34 by 0.5 to 1.0 mm. Is possible.

  The separation distance A between the tip 33a tip of the roughing cutting tool 33 and the tube axis L and the tip 34a tip of the finishing cutting tool 34 and the tube axis L and the separation distance B have a significant influence on the machining quality. Therefore, a test for obtaining the optimum set value for the coating peeling of the fiber reinforced resin tube 7 was conducted and examined. When the test specimen was cut with a fiber reinforced resin tube 7 with a nominal diameter of 100 mm for 120 seconds with a step set value C of 1 mm or 0.5 mm at the cutting edge, the finished state of the coating peeling part was compared with the conventional manual operation and roughing depth = a / coating Each value of thickness = b was compared. Table 2 shows the results of the comparison and determination, with ◎ being in a good state, ○ being usable with minor modifications, Δ being usable by minor modifications, and × being unusable.

表２に示すように、ａ／ｂの値が０．３〜０．５の間が良好な加工品質を得られることが分かった。すなわち、荒削用バイト３３は、先ず被覆層７６全層の３０〜５０％を切削する切削深度に設定し、切削される厚さが被覆層７６の３０〜５０％とすることが好適である。

As shown in Table 2, it was found that good processing quality can be obtained when the value of a / b is between 0.3 and 0.5. That is, it is preferable that the rough cutting tool 33 is set to a cutting depth at which 30 to 50% of the entire coating layer 76 is first cut, and the thickness to be cut is 30 to 50% of the coating layer 76. .

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS. The main difference between the second embodiment and the first embodiment is the structure of the drive mechanism 4 and the feed mechanism 5 of the grinding machine 3. In this embodiment, the fiber reinforced resin pipe 7 is rotated and the grinder 3 is fixed. Further, the feed mechanism 5 of the grinding machine 3 is a feed screw type and the grinding machine 3 is slid. In addition, the same code | symbol is attached | subjected to the location same as 1st embodiment, and the difference with 1st embodiment is mainly demonstrated below.

  As shown in FIG. 6, the fiber reinforced resin layer peeling apparatus 1 according to the second embodiment of the present invention is inserted into the drive mechanism 4 that rotates the fiber reinforced resin tube 7 and the opening end of the fiber reinforced resin tube 7. A center positioning tool 21, a grinding machine 3 that slides in the direction of the pipe axis toward the rotating fiber reinforced resin pipe 7, a feed mechanism 5 of the grinding machine 3 that includes a handle 51 and a pair of slide shafts 54, and It is comprised from the mount frame 8 which mounts this structural member.

  As shown in FIG. 6, the driving mechanism 4 transmits a cylindrical tube holding portion 44, flange-shaped scroll chucks 45 provided at both ends thereof, a motor 41, and the driving force of the motor 41 to the scroll chuck 45. And a driving belt 42 that performs the above-described operation. The scroll chuck 45 is a mechanism generally used in a lathe or the like. In this embodiment, the scroll chuck 45 is provided with three claw chucks 451 for gripping the fiber reinforced resin tube 7. The scroll chuck 45 is the drive mechanism 4 and can make the center of the rotating shaft coincide with the axis of the fiber reinforced resin tube 7.

  The feed mechanism 5 of the grinding machine 3 includes four mounting plates 81 erected on one end side of the gantry 8, a pair of slide shafts 54 horizontally mounted on the mounting plate 81, and end portions of the slide shafts 54. The center positioning tool holding plate 25 that is fixed to the center and holding the center positioning tool 21, the connecting body 516 that is bridged between the pair of slide shafts 54 and that fixes the grinding machine 3, and is attached to the connecting body 516. And a feed screw shaft 515 provided with a handle 51 at the end. As shown in FIG. 7, one end of the feed screw shaft 515 is rotatably attached to the connecting body 516 through a through-hole 517 provided in the center positioning tool holding plate 25. The penetrating portion 517 and the feed screw shaft 515 are screwed together, and the connecting body 516 can slide along the slide shaft 54 by rotating the handle 51.

  In this embodiment, the drive mechanism 4 is provided with the scroll chuck 45 having the claw chuck 451. However, for example, a cylindrical collet chuck is used instead of the scroll chuck 45, and the fiber reinforced resin tube 7 is fixed. Any structure that can rotate is acceptable. The feed mechanism 5 of the grinding machine 3 may have any structure and shape as long as the grinding machine 3 can be slid, and is not limited to the present embodiment.

  As the cutting tools 33 and 34 in the present invention, a clamping tool which is a kind of an assembly tool is used, but an assembly tool, an attached tool tool, a strip tool, etc. generally used for outer diameter processing may be used and are limited. is not.

  The fiber reinforced resin pipe processed by the fiber reinforced resin layer peeling apparatus of the present invention has a configuration as shown in FIG. As the mother pipe material 71, vinyl chloride resin, chlorinated vinyl chloride resin, polyethylene resin, polypropylene resin, or the like is used. If the processing method of a surface treatment part is a method of improving the adhesion effect with the primer 73, it will not be limited to sandblasting or metal spraying. As the primer 73, one that can bond the mother pipe material 71 and the reinforcing fiber layer 74 is appropriately selected. The reinforcing fiber layer is a reinforcing layer obtained by impregnating polyester fibers or the like into reinforcing fibers such as glass fibers. The surface finish layer 75 is a layer whose surface is treated with a corrosion-resistant resin.

DESCRIPTION OF SYMBOLS 1 Fiber reinforced resin layer peeling apparatus 2 Pipe fixing mechanism 21 Center positioning tool 22 Clamp part 221 Clamper 222 Clamper handle 223 Window 23 Push screw grip 24 Centering shaft 25 Center positioning tool holding plate 3 Grinding machine 31 Byte holding fixing part 33 Roughing Tooling tool 33a Tip 34 Finishing tool 34a Tip 4 Drive mechanism 41 Motor 42 Drive belt 43 Rotating cylinder 44 Tube holder 45 Scroll chuck 451 Claw chuck 5 Feed mechanism 51 Handle 511 Shaft 512 Bearing (bearing)
513 Pinion gear 514 Rack gear 515 Feed screw shaft 516 Linked body 517 Contact portion 52 Slide rail 53 Mounting table 54 Slide shaft 6 Stopper 7 Fiber reinforced resin pipe 71 Mother pipe material 72 Surface treatment section 73 Primer 74 Reinforced fiber layer 75 Surface finish layer 76 Cover layer 8 Mounting base 81 Mounting plate a Roughing depth b Covering layer thickness A Distance between the cutting edge of the roughing tool and the tube axis L B Distance between the cutting edge of the finishing tool and the tube axis L C Step height setting value D Limit Cutting edge step F Feed rate G Tip angle L Tube axis

Claims (3)

A clamp mechanism for grasping and fixing a fiber reinforced resin tube coated with a coating layer including a fiber reinforced resin layer from the outside;
A center positioning tool for fixing the fiber reinforced resin pipe from the inside;
A cutting tool fixing portion that has at least one pair of rough cutting tools and finishing cutting tools, and these tools can be arranged radially around the axis of the fiber-reinforced resin tube;
A pressing mechanism for pressing the center positioning tool against the fiber-reinforced resin tube;
A drive mechanism for rotating the clamp mechanism or the tool fixing part;
In the fiber reinforced resin layer peeling apparatus of the fiber reinforced resin pipe provided with a moving mechanism for moving the cutting tool fixing part along the tube axis direction,
A fiber-reinforced resin pipe, characterized in that a step is provided so that a cutting edge of the rough cutting bit is closer to an end face of the coating layer by 0.5 to 1.0 mm than a cutting edge of the finishing cutting bit Fiber reinforced resin layer peeling device.   The fiber reinforced resin layer peeling apparatus for fiber reinforced resin pipes according to claim 1, wherein the rough cutting tool is set to a cutting depth at which 30 to 50% of the coating layer is cut.   The fiber reinforcement of the fiber reinforced resin pipe according to claim 1 or 2, wherein a thickness cut by the rough cutting tool is 30 to 50% of the coating layer of the fiber reinforced resin pipe. Resin layer peeling device.

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