JP3730549B2 - Transmission belt cutting device and method for cutting the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a transmission belt width cutting device and a cutting method, and more particularly, a technology for cutting a belt with high accuracy while biting into a belt sleeve that elastically deforms a blade having a thickness and surpassing the deformation. The present invention relates to a narrow cut in which a cutting margin for cutting a slope portion of a V-ribbed belt in which a cut surface of a sleeve forms a slope is thin.
[0002]
[Prior art]
The V-ribbed belt is widely used as a standard cut product in which the number of rib crests is selected from 3 to 10 crests and cut at right angles at the center of the valley bottom (S1, S2, S3) at both ends (see FIG. 5). ). On the other hand, a so-called narrow cut product obtained by removing the semicircular arc portion of the belt valley bottom constituting both ends of the standard cut product is used in part for the following reason.
[0003]
The reason for this is that in the case of a standard cut product, when the pulley P provided with the flange f is mounted, the semicircular arc portions at both ends of the belt B interfere with the flange, and a strong interference portion d is generated on the belt side (see FIG. 6). For this reason, there is mainly a problem of sound generation at the initial stage of wearing, and the life process quality is also affected in the running process. This durability process is described in JP-A-2000-74154.
[0004]
In addition, in the above pulley with flange, as one method for eliminating the strong interference part d, the present applicant also discloses a pulley P for ribbed belt P having a stepped j process on the flange f. (See FIG. 7).
[0005]
On the other hand, the above-mentioned narrow cut product has a problem in reliably cutting thinly and surely the arc portion of the belt valley bottom constituting both ends of the belt over the entire circumference. This is because the thickness varies depending on the belt size type, but it is necessary to cut a very thin wall of about 0.6 mm when used frequently. As described above, it has been a problem to allow the cutting edge to penetrate into the cylindrical belt sleeve, and to cut the ring with high accuracy and reliability overcoming the deformation.
[0006]
For this reason, there was a limit to the yield of thin slice cuts in the past, and it was also possible to avoid the variation in cut quality and add one rib crest to the cutting waste to make it thick and cut the width. .
[0007]
[Problems to be solved by the invention]
However, with the above-mentioned thick cut, the manufacturing cost and the environmental loss cost associated with the increase in scrap disposal are unavoidable. On the other hand, the stepped shape machining on the flanged pulley side poses a problem in reducing the pulley machining cost. Therefore, the realization of a thin slice cut that can drastically improve these has been a problem.
[0008]
In the present invention, even when such a rubber sleeve having elasticity is cut using a thick blade while the blade thickness is pressed while deforming the surrounding sleeve, the cut piece of the cut end is cut. The object is to provide a width cutting technique that can cut a thin slice in a ring shape without being cut and scattered while moving and being caught.
[0009]
[Means for Solving the Problems]
That is, according to the first aspect of the present invention, the shaft means for stretching and rotating the belt sleeve, the cutter means using the blade for cutting the belt sleeve to a predetermined width, and the one perpendicular to the tension shaft surface. A belt cutting device comprising a cutter moving means that can move forward and backward and can be moved laterally and parallel to an axis, wherein the guide means holds the belt by engaging the concave and convex portions of the belt sleeve surface with a roll surface groove in the shaft means. It has a roll, and the cutter means is provided with two blades that cut the belt width at an interval between them, and in particular, the countermeasure to prevent the belt sleeve from escaping in the left-right direction due to the intrusion of the cutting edge at the time of cutting. It is to make it possible.
[0010]
According to the cutting device of this aspect, the roll is constituted by the shaft mounting means, the cutter means, and the cutter moving means, and the roll for catching and guiding the uneven shape on the belt sleeve surface is guided by the shaft mounting means. The cutter means is composed of two blades with the blade edge and the blade interval adjusted, and the two blades are arranged on the left and right sides of the belt cut width. Since the belt is clamped in the width direction and securely held without gaps, there is no side escaping and accurate cutting is possible.
[0011]
The invention according to claim 2 of the present application eliminates the cutting gap so that the two blades of the cutter means each have a shape of a blade on the inner and outer surfaces of the blade edge and sandwich the cut belt with each blade on the inner surface side, By making each outer blade on the outer surface symmetrical to displace the displacement due to the blade thickness to the outer sides, the deformation of the belt sleeve when the blade enters during cutting changes the shape of the uneven portion by changing the blade shape An optimum cutting edge can be configured for each. In other words, the two blade tips are symmetrically shaped, and the escape of the belt to the left and right by the blade can be made equal on the left and right to prevent the escape to the left and right. In addition, the amount of compressive deformation caused by the insertion of the cut belt that is cut and sandwiched between the two blades can be optimized. Further, the force of pushing the blade to the left and right can be adjusted by adjusting the cynogi angle and cynogi length.
[0012]
In the invention according to claim 3, the distance between the two blades can be adjusted by the cutter means. According to this cutting device, the interval between the two blades can be adjusted freely, and the setup change can be automatically performed for different sizes of crests, that is, different sizes of cut widths, and fine adjustment of the cut width is possible. Can be done easily.
[0013]
In the invention according to claim 4 of the present application, the guide roll that holds the belt by meshing the concave and convex portions of the belt sleeve surface with the roll surface groove is wound around the pivot means that contacts the cutter means. It is arranged so as to be able to contact and separate at the immediately preceding position. According to this cutting device, the concave and convex portions of the sleeve that rotates between the two axes are engaged with the roll surface groove that rotates and guides the guide roll immediately before contact with the rotating shaft equipped with the cutter, that is, in the vicinity of the upstream of rotation. In addition, the sleeve can be prevented from escaping left and right at the cutting position.
[0014]
In the invention according to claim 5 of the present application, the vulcanized belt sleeve is stretched between two shafts and rotated, and using a blade, the belt sleeve can be contacted / separated perpendicularly to one of the stretched shaft surfaces and parallel to the axis. This is a cutting method in which a belt is cut in a lateral direction by feeding it to a predetermined width, and an escape portion is prevented by a guide roll with the concave and convex portion of the belt sleeve surface as an outer surface, and the distance between the right and left two sheets is adjusted according to the belt width. This is a cutting method characterized by cutting while holding a belt sandwiched between blades.
[0015]
The cutting method according to claim 5 is a method that can prevent the sleeve from escaping to the left and right while pressing both sides of the cut width of the belt equally to the left and right with two blades and applying appropriate compression between the blades. Yes, it is a cutting method that can automatically set the cut width and finely adjust the cut width together with a mechanism that can change the distance between the two blades.
[0016]
In the invention according to claim 6 of the present application, the vulcanized belt sleeve is stretched between two axes and rotated, and using a blade, it can be contacted / separated at right angles to one of the tension shaft surfaces and parallel to the axis. This is a cutting method in which a belt is cut in a lateral direction by feeding it to a predetermined width, and the relief of the belt sleeve surface is made the outer surface to prevent escape by a guide roll, and the three intervals of four blades are narrow and standard width This is a cutting method characterized by cutting as a narrow width and laterally feeding the standard width, then performing the next cut, and cutting the thin cut part one side at a time with this combination.
[0017]
According to the cutting method of claim 6, the sleeve is pressed while cutting both sides of the left and right cut widths evenly on the left and right sides by passing one central belt at three intervals constituted by four blades and sandwiching between the blades. This is a method that can prevent the escape of the belt to the left and right, and can cut two belts simultaneously with four blades.
[0018]
[Action]
According to the configuration of claims 1 and 2, as shown in FIGS. 10 (a) and 10 (b), the blade edge shape of the cutter is such that the rubber sleeve B is pushed by the blade edge at the time of cutting and the sleeve thickness is gradually pushed to the left and right. Cut through. The edge angle θ1 of the blade edge is related to the sharpness, and the smaller the θ1 is, the better the sharpness is. On the contrary, the smaller the θ1 is, the easier the blade spills. Furthermore, compression deformation is applied to the rubber sleeve B with the penetration of the blade thickness after cutting.
[0019]
In the dispersion of this compression deformation, in the case where the blade edge is at the center of the blade thickness, compression deformation occurs evenly on both sides of the blade edge, which is convenient for cutting a flat surface into two right angles. On the other hand, a difference can be provided in the amount of compressive deformation generated on both sides of the blade edge by placing the blade edge away from the center.
[0020]
Particularly when cutting the thickness of the belt sleeve B with a thick blade edge, in particular, as a method of cutting the cut width with high accuracy, in the present invention, the two blade edges are arranged symmetrically, and the cut belt is preferably disposed within the blade interval. Hold compressed. Further compression deformation is provided on the inner side with the blade edge removed from the center so that it can escape to the outside of both blades and be eliminated. In this way, by giving a difference in the amount of the blade edge, the amount of compression deformation of the belt sleeve B can be changed to optimize the appearance of the cut section.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a partially broken side view of a transmission belt cutting device of the present invention, FIG. 2 is a front view, and FIG. 4 is a rear view. This transmission belt cutting device 1 is a device that pivots a vulcanized cylindrical belt sleeve B, cuts it into a predetermined width, and processes it into a predetermined transmission belt. Hereinafter, a narrow cut of a V-ribbed belt in the cylindrical belt sleeve B in which a V-shaped polishing groove is formed on the outer surface will be described as an example.
[0022]
The overall configuration of the cutting device 1 is such that a cylindrical belt sleeve B having a rib chamfer polished is stretched between two shafts 11 and 22, and a round cutter blade 7 is fastened. The cutter means 3 provided with the cutter holder 46 and the cutter moving means 4 for moving the cutter means 3 in and out of contact with the main shaft 11 and traversing operation are assembled to the main body 5.
[0023]
In addition to this, as a configuration according to the present invention, one is a guide roll 6 and the other is a two-blade cutter. In the former, the rubber sleeve B is reliably positioned in the shaft mounting means 2 and provided near the main shaft 11. The latter is a cutter means 3, which is provided with a new function in which the cutter blade 7 is made into two cutter blades 7a and 7b, and one of the blades 7b (see FIG. 3) can be moved forward and backward to change the cut width. Is. The whole is configured by adding these two configurations.
[0024]
Hereinafter, these element means will be described in order. First, the shaft mounting means 2 expands and contracts the distance between the main shaft 11 and the rotating main shaft 11 that also serves as a receiving base for receiving the drive shaft and the cutter cut from behind, and the circumferential length of the cylindrical belt sleeve B. In addition, the belt sleeve B includes a driven shaft 22 that presses the meandering while the belt sleeve B is rotating and tilts the shaft core in the two-axis direction.
[0025]
As shown in FIG. 2, the main shaft 11 is supported by a cantilever structure on the rotational drive side, and the right end can be opened in the drawing. As a result, the annular belt sleeve B can be attached and detached after being cut from the open end 15 at the right end of the main shaft 11. When the belt sleeve B is mounted and stretched, the open end 15 is centered, connected and supported as follows to change to a sealed end, and the shaft is supported at both ends to prevent shaft runout.
[0026]
In this both-end support state, the turning cylinder 19 is extended, the arm 16 is turned upright about the rotation support shaft 18, the protruding cylinder 17 is extended, and the centering shaft is fitted into the center hole on the end surface of the main shaft 11. Connect. In addition, the main shaft can be driven to rotate by connecting the left end of the main shaft bearing 12 to the main body 5 and the output shaft of the electric motor 14 mounted on the lower bed of the main body 5 with a transmission belt 13.
[0027]
The main shaft 11 also serves as a cradle for receiving the cutting of the cutter from the back, but the outer surface touched by the blade edge is polished with a urethane resin layer that protects the blade edge, and the contact damage of the blade becomes large. It can be repaired and replaced.
[0028]
As shown in FIG. 4, the driven shaft 22 is pivotally supported by an L-shaped swivel frame 23 so as to be cantilevered. The left end in the drawing is an open end. The belt can be removed after mounting or cutting. This is because the swing arm 25 is turned upright by the extension of the swing cylinder 28 around the swing support shaft 27 installed at the left end of the swing frame 23, the protrusion cylinder 26 is extended, and the centering shaft is fitted into the center hole on the shaft end surface. Connect together.
[0029]
The driven shaft 22 is a parallel axis on the same horizontal plane including the rotation axis of the main shaft 11, and the other end can be inclined in the vertical plane with one end of the axis as a fulcrum (see FIG. 4). That is, it can incline in the arrow direction in FIG. This is because an L-shaped swivel frame 23 supported by a swivel support shaft 24 provided on an upper portion of a support frame 31 erected on the slide table 32 has a swing nut 34 provided on the other side of the slide table 32. The amount of inclination can be adjusted by being pushed up or pulled down by twisting rotation of the adjusting bolt 33 meshing with the adjusting bolt 33.
[0030]
A fixed flange 30 for restricting the meandering of the belt is provided on the cantilevered bearing side of the driven shaft 22, and the belt sleeve B runs closer to the back of the driven shaft 22 by adjusting the inclination of the rotation shaft core, The rotation position is substantially determined by being abutted against the fixed flange 30 and limited.
[0031]
Unlike the fixed main shaft 11, the driven shaft 22 has a movable structure, and the distance between the two shafts can be expanded and contracted. Thereby, when the belt sleeve B is attached or the belt after cutting is removed, the interval can be shortened, and the annular body can be relaxed and easily detached. This is done by moving the sliding table 32 fastened on the linear bearing nut 35 slidably fitted to the guide rail 36 disposed on the bed of the main body 5. The movement of the table 32 is performed by extending and contracting the cylinder 38 by fixing the rod end of the expansion cylinder 38 accommodated in the bed 20 to the connection channel 37 extending downward from the end of the table 32.
[0032]
Next, the cutter means 3 will be described in detail with reference to FIGS. The cutter means 3 includes a cutter blade 7, a cutter holder 46, a blade interval setting unit 50, and a cutter base table 52. The two-blade function and the structure in which the two-blade spacing can be changed according to the present invention will be described in detail later.
[0033]
The cutter blade 7 is composed of two round blades 7a and 7b, both of which are fixed to the cutter holder 46 so that they can be handled integrally and safely. Further, as shown in FIG. 1, the cutter blade 7 is disposed at a right angle to the axis of the main shaft 11 with its disk surface parallel to the main shaft cross section, and the thickness of the belt sleeve B rotating along the outer surface of the main shaft is set. Can be cut at right angles.
[0034]
The cutter holder 46 is fixedly positioned so as to enable adjustment of the cutter edge per blade and reproduction of the position at the time of blade replacement. Further, the blade contact position, that is, the cut position, is used by changing the contact position little by little at a predetermined use interval with respect to sharpness deterioration.
[0035]
Next, as shown in FIG. 1, the cutter moving means 4 is a means for giving the following contact / separation operation and transverse operation to the cutter means 3 provided mainly with two cutter blades 7 and a blade interval setting unit 50 on the cutter base table 52. These are executed with high accuracy and high speed, and are compactly configured.
[0036]
The contact / separation operation is a cutting operation for moving the cutter to the surface of the main shaft 11 at a right angle, and the traversing operation is an operation for positioning the blade by repeatedly running and stopping in a direction parallel to the axis of the main shaft 11.
[0037]
The contact / separation operation is an operation in which the cutter base table 52 is moved back and forth in a direction perpendicular to the main shaft 11 so that the cutter means 3 on the table 52 approaches and separates from the main shaft 11. This is to move the table 52 in a direction perpendicular to the rotational axis of the main shaft 11. Two linear rails 54 are arranged on the cutter traversing table 60 and assembled on a linear head 53 that slides linear balls on this rail. At the same time, the ball screw 65 accommodated between the linear rails 54 is rotated in the forward and reverse directions by the servo motor 66 to be changed to a linear motion of a nut screwed to the ball screw 65 and driven.
[0038]
Next, in the transverse operation, two linear rails 62 are arranged on the main body 5, a transverse table 60 is arranged on a linear head 61 that slides on the rail, and a ball screw shaft provided between the linear rails 62 is provided. The servo motor 63 is rotated in the forward and reverse directions, parameters such as the rotation amount are set in advance, and the control method selected according to the cut size and servo control are combined so that traversing can be performed at high speed and high accuracy.
[0039]
In addition to the description of the cutter device 1 in which the shaft mount means 2, the cutter means 3 and the cutter moving means 4 are assembled to the main body 5, the shaft mount means 2 according to the present invention is provided with the guide roll 6; The contents of the means 3 having two blades will be described in detail with reference to the drawings.
[0040]
First, the guide roll 6 according to the present invention will be described in detail based on the side view shown in FIG. 1, the front view of FIG. 2, and the functional schematic diagram (b) of FIG. 11 (a). As shown in FIG. 11 (b), a crest that fits into the rib groove on the outer surface of the belt sleeve B is formed on the outer circumference of the guide roll 6 in the surface length so that the belt sleeve B can be positioned reliably. It can be configured.
[0041]
The rotary shafts at both ends are fixed to the lifter base 40 by using the rotary bearing body 41 as a shaft support that prevents play of the shaft from side to side. The lifter base 40 is provided with linear bearings 42 and sliding rods 43 at both left and right ends and is slid up and down by a central telescopic cylinder 44, and a guide roll 6 is mounted so as to be movable up and down.
[0042]
Further, as shown in FIG. 1, the guide roll 6 is rotated from the upper side in the figure, aiming at a position where the belt sleeve B wound on the main shaft 11 in the vicinity of the cutter can escape sideways just before the main shaft 11 is wound. It is lowered to the upper surface of the belt sleeve B and guided and fitted into the roll groove to guide the position on the main shaft to a predetermined position. In FIG. 11, C1 = 3 to 10 mm is preferably used as the gap with the main shaft, and C2 = 5 to 15 mm is preferably used as the pushing allowance of the sleeve.
[0043]
An overhanging frame 45 is provided from the upper part of the main body 5 and attached. In order to allow the belt sleeve B and the annular cut belt B to be attached and detached, the guide roll 6 can be retracted upward and opened to the front.
[0044]
Next, the configuration of the two blades in the cutter means 3 according to the present invention will be described in detail with reference to FIG. Here, the structure of the two-blade will be described, and this function will be described later. As shown in FIG. 3, the two-blade structure is arranged so that the two round blades 7a and 7b are sandwiched, and can be cut simultaneously when the blade edge approaches the belt sleeve B facing the front. is there. The interval between the two round blades can be set finely and freely with respect to the target belt width, so that it can be cut accurately.
[0045]
Next, the shape of the blade edge and the like will be described later together with the function, and a structure in which the distance between the two blades is variable will be described first with reference to FIG. This is a mechanism using the blade interval setting unit 50. This is done by moving the movable blade 7b, which is the other blade facing the fixed blade 7a, in the distance. This perspective movement is implemented by using a linear actuator, a ball screw, a movable head 49, and a drive motor 51 which are integrated into a compact and commercially available integrated structure actuator 50.
[0046]
On the movable head 49, the movable blade 7 b integrated with the cutter holder 46 with the mounting height being aligned by the blade support base 48 is fixed, and can be moved in the near and far directions by forward / reverse control of the drive motor 51. A thin round blade is integrally fixed to the cutter holder 46 so that it can be safely mounted.
[0047]
On the other hand, the fixed blade 7 a integrated with the cutter holder 46 is mounted on the blade holder 47 and fixed on the cutter base table 52. With the table 52 as a common bed, the movable blade 7b integrated with the cutter holder 46 mounted on the blade support base 48 is fixed on the blade interval setting unit 50 and the movable head 49 described above.
With this configuration, the cutter means 3 is mounted on the cutter base table 52 with the blade interval setting unit 50, and the blade interval between the fixed blade 7a and the movable blade 7b can be precisely set by servo drive control.
[0048]
The blade interval is set to a blade interval that matches the finishing dimension by trial cutting with a previously obtained width so as to match the belt width after cutting. These are systems that are instrumented using a programmable controller and servo control unit, and can be optimally controlled by inputting workpiece specification values and selecting buttons.
[0049]
Next, the function of the two-blade cutter means 3 according to the present invention will be described in detail. In the present invention, one belt is cut with two cutting edges. Two, the two blade edges are arranged symmetrically. Three, Shinogi conditions were established with the cutting edge shape. Using these, even with a thick cutting edge, it is possible to finish to a predetermined size appearance in a free state with the cut belt sandwiched between the blades removed after cutting.
[0050]
These are based on the following concept. First, the cut belt is suitably compressed and held within the blade interval so that a cut gap does not occur. Next, most of the compression deformation of the sleeve due to the wedge action of the blade thickness is increased on the outer surface side of the blade so that it can be deformed and released to the outside of both blades, and conversely, the inner surface side is decreased. The influence of the thickness of the cutter blade is suitably distributed to the inside and outside of the blade edge.
[0051]
As described above, with a thick blade tip, the tip of the blade tip is set symmetrically from the center to the inner surface side of both the left and right blades, so that the cut belt is suitably sandwiched between the two blades and is turning. Can be cut straight without any lateral shift.
[0052]
Subsequently, the cutting edge shape of the cutter will be described using the reference numerals in FIG. The blade angles θ1, θ2 are related to the sharpness, and the smaller the θ1, θ2, the better the sharpness. Conversely, blade spillage is more likely to spill as the angle θ1 is smaller.
[0053]
The shape of the inner surface side of the left and right blades is a single-stage Shinogi, the Shinogi angle θ1 is 5 to 10 °, and the Shinogi thickness T1 is 0.02 to 0.1 mm. In this way, both the cutting edges bite into the belt sleeve B and receive compression corresponding to the thickness of the sinogi, but the right and left are suitably balanced and no lateral deviation occurs.
[0054]
In addition, the deformation due to the bite of the blade is eliminated as much as possible to the left and right outside of the cut belt. It can be suitably cut without any play gap between the two blades under the corresponding moderate compression.
[0055]
Next, the shape of the outer surface side of the left and right blades is a two-stage cypress, and the first tier that is the cutting edge has a cynogi angle θ2 that is equivalent to the inner surface side of 5 to 20 °, and a shino thickness T2 of 0.15 to .0. In the second stage following this, the cynogi angle θ3 is 3 to 10 °, and the blade thickness is 0.5 to 2.5 mm.
[0056]
In this way, the amount of the outer surface is larger than the inner surface, and the compression deformation due to the bite of the blade thickness is eliminated as much as possible to the left and right outer sides of the cut belt. Further, by making the two blade tips symmetrical in the left-right direction, the compression reaction force generated on the left and right can be offset as much as possible.
[0057]
Next, the state in which the blade cuts into the belt sleeve B cross section and cuts it will be described with reference to FIG. 10A (cut start state) and (b) cut completion state. First, (a) at the start of cutting, the angle of the inner edge of the blade edge of the two-blade blade starts to compress the cut belt by the amount of the blade along the slope of the rib crest, and the cutting edge starts to catch the edge of the inclined surface.
[0058]
Next, as the cutting progresses according to the amount of sword on the inner surface of the blade edge, the thickness is cut through while gradually pushing left and right to deform the sleeve. The inner surface side of the blade maintains an appropriate amount of compression, and the outer surface side of the blade gradually increases outward deformation and compression force as the amount of blade blades increases.
[0059]
Further, the depth of cut is increased, and compression deformation is applied to the rubber sleeve B as the blade thickness penetrates. At the end of cutting, as shown in FIG. 10 (b), the cut belt between the two blades is sandwiched between the inner surfaces of the blades and is held in an appropriate and uniform compressed state according to the amount of the sword. Many deformations that impede this impose a condition for pushing against the outer surface of the blade.
[0060]
As described above, regarding the dispersion of the compression deformation, in the case where the blade edge is at the center of the blade thickness, the compression deformation is uniformly generated on both sides of the blade edge. On the other hand, by placing the blade edge away from the center, a difference in the amount of compressive deformation generated on both sides of the blade edge can be provided, and the lateral clearance of the sleeve B can be adjusted to the minimum.
[0061]
Next, the operation of cutting the belt sleeve B formed by polishing the rib crest according to the present invention to be narrow will be described.
(1) The cutting conditions are input and set on the operation panel of the cutting apparatus 1 of FIG. Next, when the ready push button is operated, the driven shaft 22 moves from the circumference of the input belt to a predetermined axial separation, and at the same time, the position of the movable blade 7b is set to the predetermined distance between the two blades according to the input value.
(2) The main shaft 11 and the driven shaft 22 are cantilevered, the front shaft end is opened, and the guide roll is stopped at the upper retracted position. A cylindrical belt sleeve B to be cut is inserted into both shafts 11 and 22 from the open end, and is abutted on and suspended from a fixed flange 30 located behind the driven shaft 22. The inclination of the driven shaft is determined in advance by running various belt sleeves B in advance.
[0062]
(3) With the start button, the swing arms 16 and 25 at the open ends of the main shaft 11 and the driven shaft 22 are first swung up by the swing cylinders 19 and 28, and the open shaft ends are connected by the centering cylinders 17 and 26. Support both ends.
(4) After the timer, the driven shaft 22 stretches to a predetermined tension by increasing the distance between the main shaft 11 and the shaft.
[0063]
(5) After the timer, the rotation of the main shaft 11 starts, and the guide roll 6 descends onto the rib groove of the belt sleeve B which is substantially positioned and rotated at the same time, and the rib groove is aligned and accurately guided to a predetermined position.
(6) Subsequent to the above-described pre-cut operation, the following cutter means 3 repeats the advance / retreat operation and the lateral feed operation determined in advance from the input conditions to cut the entire width of the belt sleeve B. First, the cutter cutting speed is advanced at 0.5 mm / sec in the two-blade cutting (see FIG. 8), the lateral feed pitch is the belt standard width W2, and the cutter cutting speed in the other four-blade cutting (see FIG. 9). The lateral feed pitch is similarly set to the belt standard width W2, and these can be automatically set by the cutter system selection setting in the operation panel. In this way, the entire width of the belt sleeve B is cut, the rotational drive of the main shaft 11 is stopped, the guide roll 6 returns to the upper retracted position, and the cutter means 3 returns to the starting original position.
[0064]
(7) In accordance with the return to the original position of the cutter, the driven shaft 22 reduces the axial separation, returns to the start position, releases the tension, and relaxes.
(8) Next, the connection between the centering cylinders 17 and 26 of the main shaft 11 and the driven shaft 22 is cancelled, and the swing arms 16 and 25 are rotated by the cylinders 19 and 28 to open the front shaft end.
(9) The apparatus stops for one cycle in a state where the cut belt that has finished the ring cutting between the main shaft 11 and the driven shaft 22 and the thin annular belt waste between the cut belts are suspended. This is taken out and the cutting of one sleeve is completed.
(10) For the same specification belt, the above items (2) to (9) are repeated. If the specifications are different, operation can be handled by changing the setup in the above item (1) and repeating the same.
[0065]
Next, the cutting method with two blades according to the present invention will be described in detail with the following examples. Immediately before cutting, the grooved guide roll 6 is fitted and set with the groove of the belt in the guide roll groove to accurately maintain the circumferential position in the width direction. Then, using the cutting means 3 consisting of two blades having a symmetrical blade edge, the belt is sandwiched between two blades, the amount of blade edge is optimized, and cut to a predetermined width. An example is shown below.
[0066]
〔Example〕
As shown in FIG. 8, the two-blade belt cutting method is used to cut a belt size of 1715 mm and a narrow width W2 (see FIG. 5) of 21.06 mm (that is, rib pitch 3.56 mm × rib number 6-0.3 mm). Therefore, the target narrow cut was realized by setting the following main cutting conditions.
[0067]
The driven shaft tilt distance is 15mm and can be rotated stably. The cutter blade tip is arranged with a symmetrical blade, the inner blade is 1 step cyno θ1 = 10 °, and the outer blade is a 2 tier blade. Shinogi θ2 = 10 °, the second stage is Shinogi θ3 = 6 °, the blade tip is T1 = 0.05mm from the inner surface of the blade with respect to the blade thickness of 1.5mm, and T2 = 0.18mm, almost one piece A double-edged blade close to
[0068]
Next, the main shaft rotation speed was set to 50 to 360 rpm with a main shaft diameter of φ120, the tension setting was set to 800 to 5000 N, and the cutter cutting speed was set to 0.5 mm / sec. .
[0069]
Further, a cutting method using four blades, which is another cutting method of the present invention, will be described in detail with reference to FIG. First, the cutter means 3 is composed of four blades as shown in the figure.
[0070]
The center of the blade interval is wider with respect to the left and right. In FIG. 9, the four blades are spaced so as to be positioned at N2, N3, N6, and N7. This is set by sandwiching a spacer having a predetermined width. N2 to N3, N4 to N5, and N6 to N7 are narrow belts, and N3 to N4 and N5 to N6 are annular thin scraps to be cut.
[0071]
From the first advancing / retreating position W1, a lateral feed of the standard belt width X1 from N2 to N4 is performed from the second advancing / retreating position W2. Therefore, when the four-blade cutter means 3 is caused to perform the second advance / retreat operation W2, that is, the cutting operation, four cut belts B1, B2, B3, B4 are obtained by these two cutting operations. In other words, the cutting ability can be doubled at the same speed compared to the previous two-blade. Here, conversely, the cutting ability is made equal, and the cutting speed is halved to improve accuracy.
[0072]
As for the tip shape of the cutting edge, N2 and N3 are arranged symmetrically in the same manner as the above-mentioned two-blade, and N6 and N7 are arranged symmetrically similarly to N2 and N3. In this way, since the central portion is widened with respect to the left and right blades, the thin thin-walled portion to be cut from N3 to N4 and N5 to N6 is divided into two portions on one side and cut.
[0073]
(Application example)
As described above, the narrow cut of the V-ribbed belt according to the present invention has been described in detail. However, the transmission belt can be similarly applied to a double V-ribbed belt having ribs on the back surface similar to the V-ribbed belt of this example.
[0074]
The embodiment is not limited to the above, and may be modified as follows, for example.
The two-blade is a narrow cut of the V-ribbed belt and detailed in the left-right symmetrical form,
It is not necessarily constrained symmetrically, and depending on the configuration of the belt cutting surface, based on the cutting result on the left and right, review each Shinogi condition with little lateral deviation, and provide a good balance by providing a difference in left and right according to the situation of the cut surface It can be suitably used.
Applicable rubber sleeve is V-ribbed belt with V-groove shape, double V-ribbed
The flat belt is not limited to a belt, and a two-blade cutting means is preferably used with the guide roll means free.
(3) About the biaxial axis | shaft mounting means 2, not only the arrangement | positioning in a horizontal surface but a vertical arrangement | positioning may be sufficient.
[0075]
【The invention's effect】
According to the transmission belt cutting device according to claim 1, and the transmission belt cutting method according to claim 5, first, on the outer surface of the belt sleeve rotating in the surface groove of the guide roll. Since the concavo-convex portions are aligned on the width direction and are held on the rotation shaft surface immediately afterward, it is possible to prevent lateral escape when the blade edge is inserted into the belt sleeve at the cutting position to push it. Furthermore, the cutting width can be moderately clamped with two blades, and the appearance of deformation return when released after cutting can be stabilized. From these, it became possible to perform circular cutting of thin wall accompanying narrow cut.
[0076]
According to the transmission belt cutting device of the third aspect, the changeover to the change of the cutting condition with different cutting width can be easily mechanized and automated. In addition, fine adjustment using servo control is possible, ensuring fine reproducibility and improving cutting accuracy.
[0077]
According to the method for cutting a transmission belt according to claim 6, it is possible to cut by cutting one belt in the middle with four blades, and it is possible to cut two with four blades at the same time. Will have the ability to cut. On the other hand, with the same ability, the cutting speed can be reduced and low speed cutting can be performed. The cutting accuracy was improved by the low-speed cutting, and the narrow cut was realized because the thin wall excision can be cut one by one (see FIG. 9).
[Brief description of the drawings]
FIG. 1 is an overall side view of a transmission belt cutting device according to the present invention.
2 is a front view of the transmission belt cutting device of the present invention, and is a cross-sectional view taken along arrow Y1-Y1 ′ of FIG. 1; The guide roll arrange | positioned freely is shown.
FIG. 3 is a detailed view showing a two-blade blade interval setting mechanism.
4 is a rear view of the apparatus, and is a view taken along arrow Y2-Y2 ′ of FIG. 1; 2 shows a driven-shaft running-off mechanism and a both-end pivot support mechanism of the running shaft.
FIG. 5 is a cross-sectional view of a V-ribbed belt sleeve and a schematic diagram of a width cut position.
FIG. 6 is a configuration diagram showing a strong interference unit when a pulley is mounted.
FIG. 7 is a stepped pulley diagram showing a stepped portion of the pulley.
FIG. 8 is a schematic view of a thin-walled cut with two blades of the present invention.
FIG. 9 is a schematic view of a thin wall cut by a four-blade of the present invention.
FIGS. 10A and 10B are a reaction force dispersion schematic diagram and a shape diagram of a cutting edge when the cutting edge is intruded by the two-blade of the present invention, in which (a) cut start and (b) end of cutting.
11A is a functional schematic diagram of the guide roll of the present invention, and FIG.
[Explanation of symbols]
1 Cutting device
2 Shaft mount means
3 Cutter means
4 Cutter moving means
6 Guide roll
7 Cutter means
7a Fixed blade
7b Movable blade
15 Open end
23 Rotating frame
40 Lifter base
50 Blade spacing setting unit
51 Servo motor
56 Integrated actuator
A Thin section
B belt sleeve
W1 Standard belt width
W2 narrow belt width
d Strong interference part
j Stepped part

Claims (6)

Axial means that stretches and rotates the belt sleeve, cutter means that uses a blade that cuts the belt sleeve to a predetermined width, and can move forward and backward perpendicularly to one of the tension shaft surfaces and can move laterally in parallel to the axis. A belt cutting device comprising a cutter moving means having a guide roll for holding the belt by meshing an uneven portion of a belt sleeve surface with a roll surface groove in the shaft means, the cutter means being spaced A transmission belt cutting device characterized in that it has two blades for cutting the belt width. The two blades of the cutter means each have a sinusoid shape on the inner and outer surfaces of the cutting edge, eliminate the cutting gap by sandwiching the cut belt with the inner blades on the inner surface side, and the blades with the outer blades on the outer surface side. 2. The transmission belt cutting device according to claim 1, wherein the belt belt is symmetrical to disperse the displacement due to the thickness outward. The transmission belt cutting device according to claim 1, wherein a distance between the two blades is adjustable by the cutter means. The guide means for holding the belt by engaging the concave and convex portions of the belt sleeve surface with the roll surface groove by the shaft means is arranged so as to be able to come into contact with and separate from the position immediately before the guide means is wound around the shaft means contacting the cutter means. The transmission belt cutting device according to any one of claims 1 to 3. A belt sleeve is stretched between two axes, rotated, and cut using a blade to cut the belt in a circle by allowing it to be moved to and away from the surface of one of the tension shafts at a right angle and in parallel with the axis. The method is to cut the belt sleeve while holding the belt sandwiched between the two blades on the left and right sides of the belt sleeve surface with the irregularities on the outer surface to prevent escape by the guide roll, and adjusting the distance to the belt width. A method of cutting a transmission belt characterized by A belt sleeve is stretched between two axes, rotated, and cut using a blade to cut the belt in a circle by allowing it to be moved to and away from the surface of one of the tension shafts at a right angle and in parallel with the axis. In this method, the uneven portion of the belt sleeve surface is used as an outer surface to prevent escape by a guide roll, and the three intervals formed by four blades are cut into a narrow width, a standard width, and a narrow width, and a lateral feed corresponding to the standard width is performed. After that, the cutting method for the transmission belt is characterized in that the next cut is made and the thin cut portion is cut one side by this combination.

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