KR20040039086A - Cutting apparatus for both ends of bellows assembly - Google Patents

Abstract

PURPOSE: A device for cutting both ends of a bellows assembly is provided to improve working efficiency and productivity by precisely and uniformly cutting both ends of the bellows assembly, automatically. CONSTITUTION: A device for cutting both ends of a bellows assembly(7) is composed of a supporter rotatably supporting the lower part of the bellows assembly, a pressing/supporting unit(17) rotatably pressing/supporting the upper part of the bellows assembly, a lower knife(9) inserted into the inner circumferences of both ends of the bellows assembly, an upper knife(11) interlocked with the lower knife and disposed in the outer circumferences of both ends of the bellows assembly, a knife moving unit moving the upper and lower knives forward and backward, a knife pressing unit, and a knife rotating unit for rotating the upper and lower knives. The knife pressing unit moves the upper knife downward to lap the upper knife over the lower knife partially, and moves the upper knife upward after cutting work.

Description

Cutting apparatus for both ends of bellows assembly}

The present invention relates to a device for cutting both ends of a bellows assembly, and in particular, a braid and a cap are assembled in a bellows pipe for use as an industrial pressure absorbing pipe such as an automobile, and then the both ends thereof are cut smoothly. It relates to a cutting device for both ends of the bellows assembly to be produced by.

As is generally known, a bellows assembly is formed by attaching a braid to the outside of a corrugated bellows pipe and then fixing the cap to both ends thereof. The bellows assembly is connected to an automobile pipe or a building pipe, and is widely used for absorbing thermal expansion pressure. Many products are in use.

For example, bellows assemblies used in automobiles are used in car flexes, expansion joints, mufflers, and the like, and are widely used for construction hot water and joint piping.

Such a bellows assembly is usually formed by forming a bellows tube by bulging, hydroforming, explosive forming, magnetic pulse forming, etc., and then covering the bellows tube with a braid. Then, the caps are fixed to both ends of the bellows tube and assembled.

However, after the assembly is completed, the bellows assembly assembled in the above manner is not uniform at both ends, and the material is irregularly protruded.

For example, the ends of the bellows pipe, the ends of the braid and the cap do not uniformly match each other, so finishing is required, but in the related art, an operator cuts the ends uniformly by hand.

Accordingly, the present invention has been made to solve the problem of cutting the bellows assembly both ends by the conventional manual work, to provide a device for cutting both ends of the bellows assembly capable of automatically and accurately cutting both ends of the bellows assembly automatically. Leave.

1 is an overall front configuration view showing a cutting device of both ends of the bellows assembly of the present invention,

Figure 2 is an enlarged cross-sectional view showing a cutting device of both ends of the bellows assembly of the present invention,

3 is an enlarged cross-sectional view illustrating a detailed cutting structure of the bellows assembly of the present invention;

4 is a cross-sectional configuration view showing the support means and the take-out means of the present invention,

Figure 5 is a side configuration view showing a cutting knife pressing means of the present invention,

Figure 6 is a plan view showing a cutting knife pressing means of the present invention.

In order to achieve the above object, the present invention is a support means for rotatably supporting and supporting the bellows assembly that is injected after the assembly is completed, and the bellows assembly rotatable and fixed on the upper side corresponding to the support means. A press support means for crimping and supporting, a lower knife inserted into the inner circumferential surfaces of both ends of the bellows assembly supported by the supporting means and the pressing support means, an upper knife fixedly positioned at both outer peripheral surfaces of the bellows assembly in conjunction with the lower knife; Knife transfer means for moving the lower knife and the upper knife forward and backward, and a cutting knife which lowers the upper knife to partially overlap with the lower knife in a state where both the lower knife and the upper knife are in a fixed position and rises again after cutting. Crimping means and the lower An apparatus for cutting both ends of a bellows assembly including a knife rotating means for rotating a knife and an upper knife to cut both ends of the bellows assembly.

In addition, the cutting device of both ends of the bellows assembly of the present invention comprises a take-out means for ejecting the bellows assembly after both ends are cut and the angle knife and the pressure supporting means is returned to its original position. Here, the take-out means is composed of an inclined member which is raised from the lower portion of the supporting means to lift the bellows assembly and simultaneously rolls it down, and an actuator that raises and lowers the inclined member.

Preferably the support means comprises at least three lower rollers rotatably seated and support the bellows assembly, and a support for supporting the lower roller. In addition, the pressure supporting means comprises an upper roller for directly contacting and supporting the bellows assembly, an elevating cylinder for raising and lowering the upper roller, and a guide post for elevating through the fixed frame.

Preferably, the knife conveying means in the present invention is the front and rear cylinders for moving forward and backward at the same time, the lower knife, the fixed member for supporting the forward and backward cylinders, the length provided between the front and rear cylinders and the fixed member Includes an adjustment bar.

Preferably, the cutting knife pressing means includes a connecting rotary member through which the rotary shaft of the upper knife is coupled, a fixed bracket for rotatably supporting one end of the connecting rotary member, and a cutting lift cylinder coupled to the other end of the connecting rotary member. Configuration including the piston rod.

In addition, the knife rotating means in the present invention comprises a power source, a plurality of gears connected to the power source, the rotary shaft of the upper knife coupled to one of the gear and the rotary shaft of the lower knife.

In another preferred embodiment, the present invention proposes a cutting chip discharging means. The chip discharging means includes a stripper installed on one side of a rotary shaft of a lower knife, a sliding bar directly connected to the stripper, and a sliding bar directly restoring the sliding bar. And a restoring spring and a stopper for blocking movement of the sliding bar at a predetermined position.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 1 shows the overall structure of the device for cutting both ends of the bellows assembly of the present invention, Figures 2 and 3 is an enlarged view of the main portion of the present invention in more detail.

As shown, the bellows assembly 7 after the bellows tube 1, the braid 3 and the cap 5 have been assembled has both ends uneven and irregular (see FIG. 3). (7) is cut and pressed to a certain length by the cutting device of both ends of the bellows assembly of the present invention, and finally shipped as a product.

To this end, the present invention discloses a cutting device for both ends of the bellows assembly, the specific configuration of which is as follows.

First, when the cutting device of both ends of the bellows assembly of the present invention is largely divided, the supporting means rotatably supporting and supporting the bellows assembly 7 which is inserted after the assembly is completed, and the bellows assembly from the upper side corresponding to the supporting means. And pressurizing support means for crimping and supporting the rotatable and fixed position 7.

In addition, the cutting device of both ends of the bellows assembly of the present invention is a means for directly cutting the bellows assembly (7), the lower knife (9) inserted into the inner peripheral surface of both ends of the bellows assembly (7) supported by the supporting means and the pressure supporting means And an upper knife 11 interlocked with the lower knife at both ends of the bellows assembly 7. In addition, as a means for operating the lower knife 9 and the upper knife 11, the knife transfer means for moving forward and backward the lower knife 9 and the upper knife 11, the lower knife 9 and the upper knife Cutting knife pressing means for lowering the upper knife 11 to partially overlap with the lower knife 9 in a state where all of the 11 is in an upright position, and to raise again after the work; and the lower knife 9 and the upper knife ( And rotating the knife 11 to cut both ends of the bellows assembly 7.

In addition, the cutting device of both ends of the bellows assembly of the present invention comprises a take-out means for ejecting the bellows assembly (7) after both ends are cut in the last configuration and each knife and the pressure supporting means is returned to its original position.

In the cutting device of the both ends of the bellows assembly of the present invention configured as described above, looking at the structure of the support means, at least three lower rollers 13 rotatably seated and support the bellows assembly 7 introduced from the upper side as shown in FIG. ), The lower roller (13) is rotatably installed on the fixing table (15).

After the bellows assembly 7 is put into the lower roller 13, the operation switch of both ends of the bellows assembly of the present invention is turned on. Then, the pressure supporting means constituting the present invention operates to support the bellows assembly 7 by compression.

The pressing support means comprises an upper roller 17 which directly contacts and supports the bellows assembly 7. The upper roller 17 is moved up and down by the lifting cylinder 19, and is supported by the guide post 23 which is lifted together through the fixed frame 21 to operate more stably.

Both ends of the bellows assembly 7 fixedly supported by the supporting means and the pressure supporting means are cut by the lower knife 9 and the upper knife 11 of the present invention.

The lower knife 9 and the upper knife 11 are simultaneously advanced by a knife transfer means and are transferred to a predetermined position. In this case, the lower knife 9 is inserted into the inner peripheral surface of the bellows assembly 7 as shown in FIG. The upper knife 11 is positioned above the outer circumferential surface of the bellows assembly 7.

In order to simultaneously move back and forth between the lower knife 9 and the upper knife 11, the forward and backward cylinders 29 are provided on one side of the base table 25 via the fixing member 27. The front and rear cylinders 29 forward and backward the entire knife assembly 31 having a single body. On the other hand, the length adjusting bar 33 is installed between the fixing member 27 and the forward and backward cylinder 29, which is the distance between the front and back of the knife assembly 31 according to the material, that is, the length of the bellows assembly 7. By adjusting the stroke length of the forward and backward cylinder 29, and replacing the length adjustment bar 33 with a short or long instead, to adjust the forward and backward distance to the bellows assembly (7). The predetermined purpose is realized.

After the lower knife 9 and the upper knife 11 are positioned at a desired position, the upper knife 11 is lowered while the lower knife 9 is fixed and partially overlaps with the edge of the lower knife 9. Initially the bellows assembly 7 is cut. In order to lower and raise the upper knife 11, the present invention proposes a cutting knife crimping means.

Specifically, as illustrated in FIGS. 5 and 6, the cutting knife pressing unit includes a connecting rotating member 37 to which the rotary shaft 35 of the upper knife 11 is rotatably coupled. The connecting rotating member 37 is rotatable by one end of the fixing bracket 39, but the displacement is coupled in a fixed state, and the other end is coupled to the piston rod 43 of the cutting lift cylinder 41 while the displacement is variable. Is installed. Therefore, the connecting rotary member 37 is rotated by a predetermined angle with respect to the hinge axis of the fixing bracket 39 by the lowering operation of the cutting lift cylinder 41, and as a result, at approximately an intermediate position of the connecting rotary member 37 The upper knife 11 and its rotating shaft 35 are to be lowered.

On the other hand, it is preferable to install the guide post 45 for the stable operation of the piston rod 43 and the connecting rotary member 37, and the rotary shaft 35 of the upper knife 11 is a universal joint in consideration of the lifting and lowering operation. It is recommended to connect to the power source via the.

In the state where the lower knife 9 and the upper knife 11 overlap each other and the part of the bellows assembly 7 is pressed and cut, the lower knife 9 and the upper knife 11 are rotated by the knife rotating means, At this time, both ends of the bellows assembly 7 are also rotated together.

To this end, the night rotating means has a power source 47 such as a hydraulic motor, and the rotational force of the power source 47 is transmitted to the rotary shaft 35 of the upper knife 11 through the gears 49a and 49b. Also, power is transmitted to the rotary shaft 51 of the lower knife 9 through the gears 49a and 49b.

When the cutting operation of both ends of the bellows assembly 7 is completed by the lower knife 9 and the upper knife 11, each knife and the pressing support means are returned to their original positions in the opposite operation to the present, and then the bellows assembly 7 ) Is ejected from the device of the present invention for product shipment.

To this end, in the present invention comprises a take-out means, the take-out means is raised from the bottom of the support means to raise the bellows assembly (7) and at the same time having an inclined surface to roll the bellows assembly (7) to the side dropping A member 53 and an actuator 55 for raising and lowering the inclined member 53.

On the other hand, after the cutting operation of both ends of the bellows assembly 7 is completed, the cutting chip remains on the rotary shaft of the lower knife (9). This cutting chip is to be removed for the next cutting process, it is easy to be discharged by the restoring force of the cushion member 57 is installed on the outer periphery of the rotary shaft of the lower knife 9, it is easy by the chip discharge means of the present invention Is removed. The cushion member 57 is made of urethane or a resin product. Meanwhile, the upper knife 11 is provided with a space plate 11a to maintain a gap, and the space plate 11a is pressed into a circular shape by pressing a cutting chip. An inclined portion 11b is provided that facilitates discharging by straightening. The inner side of the cushion member 57 is provided with a space member 57a for maintaining the gap of the lower knife 9.

Chip ejection means is a stripper (59) installed on one side of the rotary shaft of the lower knife (9), a sliding bar (61) directly connected to the stripper (59) and supported on the knife assembly (31) and interlocked together, and the sliding Restoration spring 63 for restoring it after sliding of the bar 61 and the sliding bar against the movement of the knife assembly 31 by blocking the movement of the sliding bar 61 at a predetermined position when the knife assembly 31 is moved. 61, the stopper 65 is fixed.

That is, the bellows assembly 7 in which both ends are cut is ejected as described above, and at the same time, the cutting chip is removed, which is a sliding bar 61 that is interlocked when the knife assembly 31 is restored to its original position. ) Is cut off by the stopper 65, in which the knife assembly 31 is continuously retracted, and as a result, the cutting chip is pushed out by the stripper 59 and discharged.

As can be seen through the embodiments described above, the both ends cutting device of the bellows assembly of the present invention automatically and accurately cuts both ends of the bellows assembly, thereby reducing all problems such as workability and productivity by conventional manual work. Can solve the problem.

In addition, according to the present invention, by using the cutting device of the both ends of the automated bellows assembly it is possible to produce a high-quality product, reducing the production defect rate can also be obtained the effect of reducing the manufacturing cost.

Claims (9)

Support means for supporting and supporting the first bellows assembly rotatably from below; Pressure support means for pressing and supporting the bellows assembly in a rotatable and precise position at an upper side corresponding to the support means; A lower knife inserted into inner circumferential surfaces of both ends of the bellows assembly supported by the supporting means and the pressure supporting means; An upper knife interlocked with the lower knife at both ends of the bellows assembly; Knife transfer means for moving forward and backward the lower knife and the upper knife; Cutting knife pressing means for lowering the upper knife so as to partially overlap with the lower knife in a state in which both the lower knife and the upper knife are in position and rising again after a cutting operation; And And a knife rotating means for rotating the lower knife and the upper knife to cut both ends of the bellows assembly. 2. The apparatus of claim 1, further comprising ejecting means for ejecting the bellows assembly after both ends of the bellows assembly are cut and each knife and the pressure supporting means are returned to their original positions. The apparatus of claim 1, wherein the supporting means comprises at least three lower rollers rotatably seating and supporting the bellows assembly, and a support for supporting the lower roller. The bellows assembly of claim 1, wherein the pressure supporting means includes an upper roller for directly contacting and supporting the bellows assembly, an elevating cylinder for elevating and lowering the upper roller, and a guide post for elevating through the fixed frame. Double end cutting device. The method of claim 1, wherein the knife conveying means is provided between the front and rear cylinders for simultaneously moving back and forth the lower knife and the upper knife, a holding member for supporting the front and rear cylinders, and between the front and rear cylinders and the fixing member Cutting device on both ends of the bellows assembly including a length adjustment bar. The method of claim 1, wherein the cutting knife pressing means is coupled to the connecting rotary member through which the rotary shaft of the upper knife is coupled, a fixing bracket for rotatably supporting one end of the connecting rotary member, and is coupled to the other end of the connecting rotary member Cutting device for both ends of bellows assembly including piston rod of cutting lift cylinder. The apparatus of claim 1, wherein the knife rotating means comprises a power source, a plurality of gears connected to the power source, a rotary shaft of an upper knife coupled to one of the gears, and a rotary shaft of a lower knife. According to claim 1, Stripper installed on one side of the rotary shaft of the lower knife, a sliding bar directly connected to the stripper, a restoring spring to restore it after the sliding movement of the sliding bar, and a stopper to block the movement of the sliding bar at a predetermined position Both ends of the bellows assembly further comprises a chip discharge means consisting of. 3. The bellows assembly according to claim 2, wherein the takeout means includes an inclined member which is lifted from the lower part of the supporting means and simultaneously rolls down the bellows assembly, and an actuator which raises and lowers the inclined member. Double end cutting device.