Hollow roll bar object cutting mechanism and method

Abstract

To provide a mechanism and a method for cutting a hollow roll bar object, which can solve the occurrence of caving / deformation of a hole edge in a cutting step.SOLUTION: A material input side insertion shaft component and a material discharge side insertion shaft component are contained. When cutting by a cutter, a right expandable head of the material input side insertion shaft component and a left expandable head of the material discharge side insertion shaft component are respectively inserted into a hollow hole of a hollow roll bar object from a material input side and a material discharge side, and the outer diameters of the right and left expandable heads respectively support the hollow hole of the hollow roll bar object. A rewinding deformation correction step is included, and a problem of rewinding deformation occurring at the hole edge is solved during cutting work. A cutter pressure releasing mechanism is further included and, during the cutting by the cutter, resilience of stored energy compressed in advance is released to the hollow roll bar object, and appropriate elastic pressure can be released on the basis of a cutter cutting depth.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a cutting technique for hollow roll bar objects, and particularly to a cutting mechanism and method for hollow roll bar objects without a tube shaft. [Background technology]

[0002] Known winding-type textile products or roll paper products mainly use a tubular object as a tubular axis around which an elongated fiber or paper material is wound. The tubular object has a hole that can be used as a central axis for hanging or pulling the product during use. However, in today's developed world, due to environmental protection and cost considerations, hollow roll bar products (hollow roll bar objects) that do not use a tubular axis have emerged.

[0003] As shown in FIG. 1, in the process of manufacturing a hollow roll bar object A, a long, thin hollow roll bar object A must be cut (divided) with a cutter 1 to form several usable finished products. However, because the material of the hollow roll bar object A is generally fiber or paper, the cutting pressure of the cutter 1 during the cutting process causes a problem of hole edge depression and deformation A2 on both sides of the cut portion of the hollow hole A1 of the hollow roll bar object A. To solve the problem of hole edge depression and deformation A2, a commonly adopted method is to insert insertion shafts 11 into the hollow hole A1 of the hollow roll bar object A (as shown in FIG. 2). The two insertion shafts 11 are opposite each other, and there is a gap within the safety range for the cutter 1 to allow the cutter to avoid the hole edge depression and deformation A2 during cutting as much as possible. However, this known method still has some problems, such as the insertion shaft often not being smoothly inserted into the hollow hole A1 of the hollow roll bar object A, inaccurate stroke control, poor efficiency, and the need to significantly change the size of the mechanism when the roll paper specifications change.

[0004] In addition, in the design of the known cutting mechanism, if it is desired to keep the cut end surface of the hollow roll bar object smooth, a sawtooth cutter cannot be used, but the disadvantage is that there is no adequate gap between the contact surface of the cutter and the object to be cut, allowing the cut surface to escape during cutting, resulting in viscous resistance between the cutter and the cut surface of the object to be cut.When the object to be cut is dense and relatively inelastic, it is difficult to make a deep cut. Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, an object of the present invention is to provide a mechanism and method for cutting hollow roll bar objects, which can solve the problem of depression and deformation of the hole edge at the center hole during the cutting process of hollow roll bar objects, improve production efficiency, and reduce the problem of reduced functionality in subsequent processes and later use. [Means for solving the problem]

[0006] To achieve the above-mentioned objectives, the present invention provides a mechanism and method for cutting a hollow roll bar object, which includes a material input insertion shaft component and a material output insertion shaft component. When a cutter cuts the hollow roll bar object, the right expandable head of the material input insertion shaft component and the left expandable head of the material output insertion shaft component are inserted into the hollow hole of the hollow roll bar object from the material input side and the material output side, respectively, and the outer diameters of the right expandable head and the left expandable head respectively support the hollow hole of the hollow roll bar object. The present invention further includes a cutter pressure release mechanism, which, when the cutter cuts the hollow roll bar object, can release the elastic force of pre-compressed stored energy to the hollow roll bar object and release corresponding elastic pressure according to the cutting depth of the cutter. [Effects of the Invention]

[0007] In terms of effectiveness, the present invention solves the problem of depression and deformation of the hole edge at the center hole during the cutting process of hollow roll bar objects, improves production efficiency, and reduces the trouble of reduced functionality in subsequent processes and at later dates.The present invention introduces servo-driven components into the hollow roll bar object cutting mechanism, which controls the material input side insertion shaft component and the material output side insertion shaft component, thereby accelerating the operation procedure, precisely and accurately controlling the stroke, improving production speed, and meeting the needs of different hole diameters of different hollow roll bar objects and fine-tuning the enlargement / reduction of the material input side insertion shaft component and the material output side insertion shaft component.

[0008] The rewinding deformation correction process of the present invention can correct the hole edges of a hollow roll bar object during cutting work of the hollow roll bar object, thereby improving the problem of rewinding deformation occurring at the hole edges of the hollow roll bar object.

[0009] The cutter pressure release mechanism of the present invention can release the elastic force of the pre-compressed stored energy to the hollow roll bar object when the cutter cuts the hollow roll bar object, and can release a corresponding elastic pressure based on the cutting depth of the cutter.

[0010] The specific techniques employed in the present invention are further illustrated by the following examples and accompanying diagrams. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a schematic diagram showing that depression and deformation of the hole edges occur on both sides of the cut portion when a hollow roll bar object is cut with a cutter in the prior art. [Figure 2]1 is a schematic diagram showing that in the prior art, insertion shafts are inserted into the hollow holes of a hollow roll bar object, but even so, depression and deformation of the hole edges occur on both sides of the cutting point when cutting with a cutter. [Figure 3] 1 is a schematic diagram showing a hollow roll bar object cutting mechanism of the present invention; FIG. [Figure 4] 4 is a side view showing the positional relationship between the material pushing plate, the material groove, and the hollow roll bar object in FIG. 3. FIG. [Figure 5] FIG. 4 is a left side view of the cutting unit in FIG. 3, showing the arrangement relationship between the cutter, the material discharge clamp, the material push-feed plate, and related cutter drive components. [Figure 6] 1 is a schematic diagram showing an operation state in which material is replenished / discharged according to the present invention; [Figure 7] 1 is a schematic diagram showing an operating state in which cutting is performed according to the present invention; [Figure 8] FIG. 1 is a schematic diagram showing a simplified correspondence between a material input side insertion shaft component and a material discharge side insertion shaft component in the present invention. [Figure 9] 9 is a schematic diagram showing the end of the right expandable head in FIG. 8 split into a ring of claws. [Figure 10] FIG. 9 is a cross-sectional view showing the material input side insertion shaft component and the right servo drive component in FIG. 8. [Figure 11] FIG. 9 is a schematic diagram showing the material discharge side insertion shaft component and the left servo drive component in FIG. 8. [Figure 12] FIG. 2 is an enlarged schematic view showing the correspondence between the right expandable head and the left expandable head in the present invention when the outer diameter is expanded. [Figure 13] 1 is an enlarged schematic view showing the correspondence between the right expandable head and the left expandable head in the present invention when the outer diameter is reduced. [Figure 14A] 4 is an operational flowchart showing the rewinding deformation compensation process of the present invention. [Figure 14B] 4 is an operational flowchart showing the rewinding deformation compensation process of the present invention. [Figure 14C] 4 is an operational flowchart showing the rewinding deformation compensation process of the present invention. [Figure 14D] 4 is an operational flowchart showing the rewinding deformation compensation process of the present invention. [Figure 14E] 4 is an operational flowchart showing the rewinding deformation compensation process of the present invention. [Figure 15A] 1 is a schematic diagram illustrating the cutter pressure relief mechanism of the present invention and its operation. [Figure 15B] 1 is a schematic diagram illustrating the cutter pressure relief mechanism of the present invention and its operation. [Figure 15C] 1 is a schematic diagram illustrating the cutter pressure relief mechanism of the present invention and its operation. DETAILED DESCRIPTION OF THE INVENTION

[0012] Example Please refer to Figure 3. As shown in this figure, the machine body includes a cutting section 100, a material input side 200, and a material output side 300. The cutting section 100 has a predefined cutting position P1, and a cutter 1 is positioned exactly at the location corresponding to the cutting position P1. A material input clamp 12a and a material output clamp 12b are installed on both the left and right sides of the cutting position P1, respectively.

[0013] The material input side 200 includes a material input side insertion shaft component 2, a material push feed plate 3, and a material groove 4. The material input side insertion shaft component 2 includes a right pulley 21, and therefore, the material input side insertion shaft component 2 can perform linear movement in the left and right directions under the drive of a right pulley drive component 211. The material push feed plate 3 can push a hollow roll bar object A toward the cutting section 100 by performing linear movement under the drive of a material push feed plate drive component 31. The material groove 4 is installed between the material push feed plate 3 and the cutting section 100. FIG. 4 is a side view showing the positional relationship among the material push feed plate 3, material groove 4, and hollow roll bar object A in FIG. 3. FIG. 5 is a left side view of the cutting section 100 in FIG. 3, showing the positional relationship among the cutter 1, the material input side clamp 12a, the material push feed plate 3, and the cutter-related drive components.

[0014] The material discharge side 300 includes a material discharge side insertion shaft component 5, a stopper plate 6, and a material discharge mechanism 7. The material discharge side insertion shaft component 5 includes a left pulley 51, and therefore the material discharge side insertion shaft component 5 can perform linear movement in the left and right directions under the drive of the left pulley drive component 511. The stopper plate 6 is installed between the cutting section 100 and the material discharge side 300.

[0015] Please refer to Figures 6 and 7. As shown in these figures, Figure 6 is a schematic diagram of an operating state in which material is being refilled / discharged according to the present invention, and Figure 7 is a schematic diagram of an operating state in which cutting according to the present invention is being performed. As shown in Figure 6, when the right pulley 21 and the material push-feed plate 3 return to the right end, an empty material input area is formed between the cutting section 100 and the material input side 200. At this time, a hollow roll bar object A can be input into the material groove 4.

[0016] After the hollow roll bar object A is properly placed on the material groove 4, the right extendable head 22 in the material input side insertion shaft component 2 is inserted into the hollow hole A1 of the hollow roll bar object A from the material input side 200 toward the cutting section 100 and moves left to a predetermined position, and at the same time the material pushing feed plate 3 pushes and moves the hollow roll bar object A toward the cutting section 100, causing the left end of the hollow roll bar object A to protrude a predetermined length beyond the cutting position P1. At the same time, the left extendable head 52 in the material discharge side insertion shaft component 5 is also inserted into the hollow hole A1 of the hollow roll bar object A from the material discharge side 300 toward the cutting section 100, waiting for cutting to occur.

[0017] 7, the hollow roll bar object A fed to the cutting section 100 is cut by the cutter 1 to form finished products B of a predetermined length. Some of the cut finished products B are stopped by the stopper plate 6, and the left extendable head 52 of the material discharge side insertion shaft component 5 remains inserted into the hollow hole of the hollow roll bar object A. When the left pulley 51 returns to the left and reaches its end, the material discharge side insertion shaft component 5 also moves left accordingly, dropping some of the cut finished products B into the material discharge mechanism 7 and sending them out by the slope belt conveyor of the material discharge mechanism 7.

[0018] Please refer to Figure 8. This figure is a schematic diagram showing the relationship between the material input side insertion shaft component 2 and the material discharge side insertion shaft component 5 in the present invention. As shown in the figure, the left end of the material input side insertion shaft component 2 is coupled to a right expandable head 22, the end of which is divided into a ring-shaped array of claws 221 (as shown in Figure 9), and a right tapered hole 222 is formed between the claws 221. The right tapered head 23 is movably housed in the right tapered hole 222 (Figure 10).

[0019] Similarly, the right end of the material discharge side insertion shaft component 5 is coupled to a left expandable head 52, the end of which is also divided into a plurality of annular claws 521, and a left tapered hole 522 is formed between the plurality of claws 521. The left tapered head 53 is movably housed in the left tapered hole 522 (FIG. 11).

[0020] 10 shows a cross-sectional view of the material supply side insertion shaft component 2 in FIG. 8. One end of the right outer conduit 24 is connected to the right expandable head 22, and the other end is connected to the right pulley 21. One end of the right central drive shaft 25 is connected to the right tapered head 23, and the other end is connected to the right servo drive component 26 through the internal space of the right outer conduit 24.

[0021] The right servo drive component 26 includes a right servo motor 261. When the right servo motor 261 rotates, it drives and rotates a rotating sleeve 273 via an output shaft 272 of a reducer 271. A ball nut 275 is connected to the inside of the rotating sleeve 273 by a key 274, so that the ball nut 275 rotates along with the rotating sleeve 273. A ball screw 276 is threadedly engaged with the ball nut 275, so that the ball screw 276 can perform linear expansion and contraction motion in response to the ball nut 275. The ball screw 276 is connected to the right central drive shaft 25 by a ball spline 277. The outside of the ball spline 277 is covered with a spline bushing 278 in an annular shape, and is further connected to a fixed cylinder 280 by a key 279, which allows the ball spline 277 to move only in a linear direction in the left-right direction. Therefore, the ball spline 277 can cause the right central driving shaft 25 to move in a linear direction in the left-right direction, which allows the right tapered head 23 to move in a linear direction in the right tapered hole 222 along the left-right direction, and further increases or decreases the outer diameter of the right expandable head 22.

[0022] 11 shows a cross-sectional view of the material discharge side insertion shaft component 5 in FIG. 8. One end of the left outer conduit 54 is connected to the left expandable head 52, and the other end is connected to the left pulley 51. One end of the left central drive shaft 55 is connected to the left tapered head 53, and the other end is connected to the left servo drive component 56 through the internal space of the left outer conduit 54.

[0023] The left servo drive component 56 includes a left servo motor 561. When the left servo motor 561 rotates, it drives and rotates a rotating sleeve 573 via an output shaft 572 of a reducer 571. A ball nut 575 is connected to the inside of the rotating sleeve 573 by a key 574, so that the ball nut 575 rotates following the rotating sleeve 573, and a ball screw 576 performs a linear extension / retraction motion relative to the ball nut 575. The ball screw 576 is connected to the left center drive shaft 55 by a ball spline 577. The outside of the ball spline 577 is covered with a spline bushing 578 in an annular shape, and is connected to a fixed cylinder 580 by a key 579, so that the ball spline 577 can only move linearly in the left-right direction. Therefore, the spline bushing 578 allows the left central drive shaft 55 to move linearly in the left-right direction, so that the left tapered head 53 can move linearly in the left tapered hole 522 along the left-right direction, and further, the outer diameter of the left expandable head 52 can be expanded or contracted.

[0024] In the present invention, the servo motor is combined with related components to replace the operation of the traditional pneumatic cylinder, accelerating the operation procedure and improving the production speed. In the present invention, the servo motor is driven in a stepless stroke control type to achieve the expansion / contraction of the outer diameter of the right expandable head 22 and the left expandable head 52, which can meet the needs of different hole diameters of different hollow roll bar objects and the purpose of fine-tuning the expansion / contraction.

[0025] Furthermore, by driving the servo motor, the travel stroke of the right tapered head 23 can be adjusted to easily change the expansion / contraction of the outer diameter of the right expandable head 22, and the travel stroke of the left tapered head 53 can be adjusted to easily change the expansion / contraction of the outer diameter of the left expandable head 52. This design of the present invention can accommodate the inner diameters of different hollow roll bar object products, thereby reducing the production and replacement of standard parts, and allowing the expansion width of the right expandable head 22 and the left expandable head 52 to be fine-tuned, thereby achieving the best production quality.

[0026] 12 is an enlarged schematic diagram showing the relationship between the right expandable head 22 and the left expandable head 52 in the expanded state. When the right tapered head 23 moves leftward and presses against the inner wall of the right tapered hole 222 of the right expandable head 22, the claws 221 of the right expandable head 22 expand outward, thereby expanding the outer diameter of the right expandable head 22. When the left tapered head 53 moves rightward and presses against the inner wall of the left tapered hole 522 of the left expandable head 52, the claws 521 of the left expandable head 52 expand outward, thereby expanding the outer diameter of the left expandable head 52.

[0027] When the hollow roll bar object A is fed into the cutting section 100 and protrudes a predetermined length from the cutting position P1, the right expandable head 22 and the left expandable head 52 are located on either side of the cutting position P1 corresponding to each other, and there is a gap between them to allow the cutter to move. When the outer diameters of the right expandable head 22 and the left expandable head 52 are in an outward expanded state, they respectively support the inner ring edge of the hollow roll bar object A, and then the cutter 1 cuts the hollow roll bar object A along the cutting position P1.

[0028] During the cutting operation and material pushing operation of the hollow roll bar object A in the present invention, the operation of expanding / reducing the outer diameter of the right expandable head 22 and the left expandable head 52 is advantageous for inserting the right expandable head 22 and the left expandable head 52 into the hollow hole A1 of the hollow roll bar object A, and is also advantageous for the cutting operation.

[0029] 13 shows an enlarged schematic diagram of the correspondence between the right expandable head 22 and the left expandable head 52 in the present invention when their outer diameters are reduced. When the right tapered head 23 is moved rightward (i.e., away from the cutting portion 100) by the driving of the right servo drive component 26, the pressure exerted by the right tapered head 23 on each of the claws 221 of the right expandable head 22 decreases or disappears, thereby reducing the outer diameter of the right expandable head 22. Similarly, when the left tapered head 53 is moved leftward by the driving of the left servo drive component 56, the pressure exerted by the left tapered head 53 on each of the claws 521 of the left expandable head 52 decreases or disappears, thereby reducing the outer diameter of the left expandable head 52.

[0030] When the cutter 1 cuts the hollow roll bar object A, when the first stage of the finished product B is cut out and the hollow roll bar object A is pushed forward again by the next predetermined length, there must be a gap at the cutting position P1 to allow the cutter to move around, and therefore the hollow hole A1 of the hollow roll bar object A still cannot receive full support across the board, resulting in partial collapse and deformation at the side edge of the hollow roll bar object A at the cutting position P1. When the left extendable head 52 is pushed into the hollow hole A1 of the hollow roll bar object A, the left extendable head 52 will cause a rewind deformation problem at the collapsed and deformed portion. In order to further improve the rewind deformation problem, in the present invention, based on the above-mentioned structural design, a rewind deformation compensation process is added.

[0031] 14A to 14E show an operational flow chart of the unwinding deformation compensation process of the present invention, which includes the following steps:

[0032] As shown in FIG. 14A, after cutting is completed, the cutter 1 rises, the left tapered head 53 retreats, the outer diameter of the left expandable head 52 is reduced, the outer diameter of the right expandable head 22 remains expanded, and the material pushing and feeding plate 3 pushes and moves the hollow roll bar object A to the left by a predetermined length.

[0033] As shown in FIG. 14B, the left tapered head 53 moves to the right, expanding the outer diameter of the left expandable head 52, and at this time, the outer diameter of the right expandable head 22 also remains expanded, and the cutter 1 descends to cut.

[0034] As shown in Figure 14C, after cutting is completed, the cutter 1 rises, and at this time, while the hollow roll bar object A is stationary, the left tapered head 53 retreats, causing the outer diameter of the left expandable head 52 to contract; at this time, while the outer diameter of the right expandable head 22 expands, the right expandable head 22 moves to the left and passes the cutting position P1, and the outer ring edge of the right expandable head 22 compensates for the front rewinding deformation A3 of the front hole edge of the hollow roll bar object A.

[0035] As shown in FIG. 14D, the material pushing plate 3 pushes and moves the hollow roll bar object A again to the left by a predetermined length, and during the stroke when the hollow roll bar object A is pushed and moves to the left and passes the left expandable head 52, the outer ring edge of the left expandable head 52 compensates for the rear rewinding deformation A4 of the rear hole edge of the hollow roll bar object A.

[0036] As shown in Figure 14E, when the hollow roll bar object A is pushed and moved to the left and reaches a predetermined length of the cutting position P1, the material pushing and feeding plate 3 stops pushing and feeding the material, and the left tapered head 53 moves to the right, thereby expanding the outer diameter of the left expandable head 52, and at this time, the outer diameter of the right expandable head 22 also remains in an expanded state.

[0037] The above procedure is repeated until all cutting of the hollow roll bar object A is completed.

[0038] In the hollow roll bar object cutting mechanism of the present invention, the cutting section 100 further includes a cutter pressure release mechanism 400, which allows the cutter to peel off the cut hollow roll bar object during the process of cutting the hollow roll bar object, thereby eliminating the increased resistance force that the cutter experiences when cutting deeply.

[0039] 15A to 15C, which show a schematic diagram of the cutter pressure release mechanism of the present invention and its operation. A material input clamp 12a and a material output clamp 12b are installed on both sides of the cutter 1 on the hollow roll bar object A, and are used to clamp the hollow roll bar object A. The material input clamp 12a and the material output clamp 12b are connected to a right positioning plate 14a and a left positioning plate 14b by a right rotation center 13a and a left rotation center 13b, respectively.

[0040] The cutter pressure release mechanism 400 of the present invention includes a right crankshaft connecting rod 81a, the top end of which is connected to the bottom edge of the material input clamp 12a, and the bottom end of which is connected to a right crankshaft 82a. The right crankshaft connecting rod 81a is separately connected to a right elastic member 83a. The right crankshaft 82a can be driven and rotated by a right servo motor 84a. When the right crankshaft 82a is driven by the right servo motor 84a and rotates a certain angle, the right elastic member 83a is compressed and can store energy.

[0041] Similarly, the top end of the left crankshaft connecting rod 81b is connected to the bottom edge of the material discharge-side clamp 12b, and the bottom end is connected to the left crankshaft 82b. The left crankshaft connecting rod 81b is separately coupled to a left elastic member 83b. The left crankshaft 82b can be driven and rotated by a left servo motor 84b. When the left crankshaft 82b is driven by the left servo motor 84b and rotates a certain angle, the left elastic member 83b is compressed and can store energy.

[0042] When the cutter 1 has not yet cut the hollow roll bar object A, the cutter pressure release process is first carried out, that is, the right crankshaft 82a and the left crankshaft 82b are raised and the right crankshaft connecting rod 81a and the left crankshaft connecting rod 81b are respectively brought into contact, so that the right elastic part 83a and the left elastic part 83b are compressed and energy is stored. When the cutter 1 begins to cut the hollow roll bar object A, the structure of the hollow roll bar object A is partially destroyed at the cutting position P1. At this time, the right elastic part 83a and the left elastic part 83b release the elastic force that was originally compressed and storing energy, and apply the elastic force to the material input side clamp 12a and the material output side clamp 12b through the right crankshaft connecting rod 81a and the left crankshaft connecting rod 81b, respectively. This enlarges the crack at the cutting position P1 of the hollow roll bar object A and reduces the viscous resistance force of the hollow roll bar object A against the cutter 1, making it easier for the cutter 1 to cut the hollow roll bar object A.

[0043] When the cutter 1 cuts the hollow roll bar object A to a deeper depth, the right elastic part 83a and the left elastic part 83b release corresponding elastic pressure to the bottom edges of the material input side clamp 12a and the material output side clamp 12b according to the cutting depth of the cutter 1, thereby performing the ideal and best cutting auxiliary function of cutting and peeling.

[0044] The above embodiments are only for illustrative purposes of the structural design of the present invention and are not intended to limit the present invention. Anyone skilled in the art can make modifications and changes to the above embodiments within the structural design and spirit of the present invention, and these modifications will still fall within the spirit of the present invention and the scope of the patent defined below. Therefore, the scope of protection of the rights of the present invention shall be as set forth in the following claims. [Explanation of symbols]

[0045] 100 cutting section 200 Material input side 300 Material discharge side 400 Cutter Pressure Relief Mechanism 1 cutter 11 Insertion shaft 12a Material input side clamp 12b Material discharge side clamp 13a Right rotation center 13b Left rotation center 14a Right positioning plate 14b Left positioning plate 2. Material input side insert shaft component 21 Right pulley 211 Right Pulley Drive Component 22 Right Extendable Head 221 Claw 222 Right tapered hole 23 Right tapered head 24 Right external duct 25 Right center drive shaft 26 Right Servo Drive Component 261 Right servo motor 271 Reducer 272 output shaft 273 Rotating Sleeve 274 keys 275 ball nut 276 Ball Screw 277 Ball Spline 278 Spline bush 279 keys 280 Fixed tube 3 Material push-feed plate 31 Material push feed plate drive component 4 Material groove 5 Insertion shaft component on material discharge side 51 Left pulley 511 Left pulley drive component 52 Left Extendable Head 521 Claw 522 Left tapered hole 53 Left tapered head 54 Left external duct 55 Left center drive shaft 56 Left servo drive component 561 Left servo motor 571 Reducer 572 output shaft 573 Rotating Sleeve 574 keys 575 ball nut 576 Ball Screw 577 Ball Spline 578 Spline Bush 579 keys 580 Fixed tube 6 Stopper plate 7 Material discharge mechanism 81a Right crankshaft connecting rod 81b Left crankshaft connecting rod 82a Right crankshaft 82b left crankshaft 83a Right elastic part 83b Left elastic part 84a Right servo motor 84b Left servo motor A Hollow roll bar object A1 hollow hole A2 Depression and deformation of hole edges A3 Front Rewind Transformation A4 rear rewind deformation B Finished product P1 cutting position

Claims

1. A hollow roll bar object cutting mechanism, which a cutting section in which a cutter is arranged and a cutting position is defined in advance; a material input side located on one side of the cutting section, for supplying a hollow roll bar object to the cutting section through a material groove, the hollow roll bar object having a hollow hole; a material discharge side located on the other side of the cutting portion; Including, a material input side insertion shaft component is disposed in the material input side, the material input side insertion shaft component includes a right extendable head that is insertable into the hollow hole of the hollow roll bar object from the material input side toward the cutting portion, and the right extendable head can be controlled to assume an expanded state or a contracted state; a material discharge side insertion shaft component is disposed in the material discharge side, the material discharge side insertion shaft component includes a left extendable head that can be inserted into the hollow hole of the hollow roll bar object from the material discharge side toward the cutting portion, and the left extendable head can be controlled to assume an expanded state or a contracted state; wherein the hollow roll bar object is fed into the cutting section through the material groove and protrudes from the cutting position by a predetermined length, the right expandable head is inserted into the hollow hole of the hollow roll bar object from the material input side toward the cutting section, and the left expandable head is inserted into the hollow hole of the hollow roll bar object from the material discharge side toward the cutting section, the right expandable head and the left expandable head are located on opposite sides of the cutting position, with a gap to allow the cutter to avoid them, when the outer diameters of the right expandable head and the left expandable head are in an expanded state, they respectively support the hollow hole of the hollow roll bar object, and the cutter cuts the hollow roll bar object along the cutting position.

2. The material input side insertion shaft component is a right outer conduit, one end of which is connected to the right expandable head and the other end of which is connected to the right pulley, the end of which is divided into a plurality of claws forming an annular row, and a right tapered hole is formed between the plurality of claws; a right tapered head movably accommodated in the right tapered hole; Right servo drive component; a right central drive shaft, one end of which is coupled to the right tapered head and the other end of which is connected to the right servo drive component through the internal space of the right outer conduit; Including, When the right central driving shaft is driven by the right servo driving component to move toward the cutting section, it drives and moves the right tapered head, and presses the inner hole wall of the right expandable head, causing the several claws of the right expandable head to expand outward, thereby expanding the outer diameter of the right expandable head; When the right central drive shaft is driven by the right servo drive component to move away from the cutting section, the pressure exerted by the right tapered head on each of the claws of the right expandable head is reduced or eliminated, thereby reducing the outer diameter of the right expandable head.

2. The hollow roll bar object cutting mechanism of claim 1.

3. The right servo drive component a right servo motor that drives and rotates the rotating sleeve; a ball nut coupled to the rotating sleeve and rotating along with the rotating sleeve; a ball screw that is threadedly engaged with the ball nut, is moved by the ball nut, and performs an expansion and contraction linear motion corresponding to the ball nut; a ball spline coupled to the ball screw and the right central drive shaft; a spline bushing annularly surrounding the ball spline and coupled to a fixed cylinder, whereby the ball spline can cause the right central drive shaft to perform a linear motion in a left-right direction, the right tapered head can perform a linear motion in the right tapered bore along the left-right direction, and the outer diameter of the right expandable head can be expanded or reduced; Including, 3. The hollow roll bar object cutting mechanism of claim 2.

4. The material discharge side insertion shaft component is a left outer conduit, one end of which is connected to the left expandable head and the other end of which is connected to the left pulley, the end of which is divided into a plurality of claws forming an annular row, and a left tapered hole is defined between the plurality of claws; a left tapered head movably housed in the left tapered hole; Left servo drive components and a left central drive shaft, one end of which is coupled to the left tapered head and the other end of which is connected to the left servo drive component through the internal space of the left outer conduit; Including, When the left central driving shaft is driven by the left servo driving component to move toward the cutting section, it drives and moves the left tapered head, and presses the inner bore wall of the left expandable head, causing the several claws of the left expandable head to expand outward, thereby enlarging the outer diameter of the left expandable head; When the left central drive shaft is driven by the left servo drive component to move in a direction away from the cutting section, the pressure exerted by the left tapered head on each of the claws of the left expandable head is reduced or eliminated, thereby reducing the outer diameter of the left expandable head.

2. The hollow roll bar object cutting mechanism of claim 1.

5. The left servo drive component A left servo motor that drives and rotates the rotating sleeve; a ball nut coupled to the rotating sleeve and rotating along with the rotating sleeve; a ball screw that is threadedly engaged with the ball nut, is moved by the ball nut, and performs an expansion and contraction linear motion corresponding to the ball nut; a ball spline coupled to the ball screw and the left center drive shaft; a spline bushing annularly surrounding the ball spline and coupled to a fixed cylinder, whereby the ball spline can cause the left central drive shaft to perform a linear motion in a left-right direction, the left tapered head can perform a linear motion in the left tapered bore along the left-right direction, and the left expandable head can have an outer diameter expanded or contracted; Including, 5. The hollow roll bar object cutting mechanism of claim 4.

6. moreover, A material input side clamp installed on the right side of the cutting position; a material discharge side clamp installed on the left side of the cutting position; a cutter pressure release mechanism, which is installed at the cutting section and includes a right elastic element and a left elastic element, so that when the cutter has not yet cut the hollow roll bar object, it is compressed and stores energy in advance; when the cutter starts to cut the hollow roll bar object, the right elastic element and the left elastic element release the elastic force that has stored energy through compression to the bottom edges of the material input clamp and the material output clamp, thereby enlarging the gap at the cutting position of the hollow roll bar object; and when the cutter cuts the hollow roll bar object to a deeper depth, the right elastic element and the left elastic element release corresponding elastic pressure to the material input clamp and the material output clamp according to the cutter's cutting depth; Including, 2. The hollow roll bar object cutting mechanism of claim 1.

7. The cutter pressure relief mechanism includes: The material input side clamp is connected to the right positioning plate by a right rotation center, a right crankshaft located at the bottom of the material input side clamp; a right crankshaft connecting rod disposed between the material input clamp and the right crankshaft and coupled to the right elastic component; a right servomotor connected to the right crankshaft and used to drive the right crankshaft; The material discharge side clamp is connected to the left positioning plate by a left rotation center, a left crankshaft located at the bottom of the material discharge side clamp; a left crankshaft connecting rod disposed between the material discharge side clamp and the left crankshaft and coupled to the left elastic part; a left servomotor coupled to the left crankshaft and used to drive the left crankshaft; Including, 7. The hollow roll bar object cutting mechanism of claim 6.

8. A method for cutting a hollow roll bar object, the method comprising: when a cutter of a hollow roll bar object cutting mechanism cuts the hollow roll bar object, applying elastic force that has been compressed in advance and stored as energy to the hollow roll bar object up to a cutting position, the method comprising: (a) a material input clamp is installed on the right side of the cutting position to clamp the hollow roll bar object; (b) a material discharge side clamp is installed to the left of the cutting position to be used to clamp the hollow roll bar object; (c) when the cutter has not yet cut the hollow roll bar object, performing a cutter pressure release step, so that the right elastic element and the left elastic element are pre-compressed and store energy; (d) when the cutter starts to cut the hollow roll bar object, the right elastic element and the left elastic element release the elastic force that has been compressed and stored in energy to the bottom edges of the material input side clamp and the material discharge side clamp, thereby widening the gap at the cutting position of the hollow roll bar object; (e) when the cutter cuts the hollow roll bar object to a deeper depth, the right elastic element and the left elastic element release corresponding elastic pressures to the material input clamp and the material discharge clamp according to the cutting depth of the cutter; This includes the steps: How to cut a hollow roll bar object.

9. The cutter pressure release step of step (c) includes: (c1) The right crankshaft is disposed at the bottom of the material input side clamp; (c2) a right crankshaft connecting rod is disposed between the material input side clamp and the right crankshaft, and the right crankshaft connecting rod is coupled to the right elastic part; (c3) a right servo motor is coupled to the right crankshaft and is used to drive and rotate the right crankshaft; (c4) the left crankshaft is disposed at the bottom of the material discharge side clamp; (c5) a left crankshaft connecting rod is disposed between the material discharge side clamp and the left crankshaft, and the left crankshaft connecting rod is coupled to the left elastic part. (c6) a left servo motor is coupled to the left crankshaft and is used to drive and rotate the left crankshaft; 9. The method for cutting a hollow roll bar object according to claim 8, comprising the steps of:

10. A method for cutting a hollow roll bar object, which is used to correct a rollback deformation occurring at a hole edge of the hollow roll bar object after cutting by a cutter of a hollow roll bar object cutting mechanism, the hollow roll bar object cutting mechanism comprising: A cut portion; Material input side, A material discharge side; a material push-feed plate disposed on the material input side; a material input side insertion shaft component disposed on the material input side, including a right extendable head insertable into a hollow hole of the hollow roll bar object, the right extendable head being controllable to assume an expanded state or a contracted state; a material discharge side insertion shaft component disposed in the material discharge side, including a left extendable head insertable into a hollow hole of the hollow roll bar object, the left extendable head being controllable to assume an expanded state or a contracted state; Including, The method comprises: (a) after the cutter has completed cutting the hollow roll bar object at the cutting position, the cutter ascends, the left tapered head retreats, thereby reducing the outer diameter of the left expandable head, and the outer diameter of the right expandable head remains expanded, and the material pushing plate pushes and moves the hollow roll bar object leftward by a predetermined length; (b) the left tapered head moves to the right, expanding the outer diameter of the left expandable head, while the outer diameter of the right expandable head also remains expanded, and the cutter descends to cut; (c) after the cutting is completed, the cutter ascends, and at this time, the hollow roll bar object remains stationary, and the left tapered head retreats to contract the outer diameter of the left expandable head; and at this time, the outer diameter of the right expandable head expands, and the right expandable head moves leftward to pass the cutting position, and the outer ring edge of the right expandable head compensates for the front rewind deformation of the front hole edge of the hollow roll bar object; (d) the material pushing feed plate pushes and moves the hollow roll bar object again to the left by a predetermined length, and during the stroke when the hollow roll bar object is pushed and moved to the left and exceeds the left extendable head, the outer ring edge of the left extendable head compensates for the rear rewinding deformation of the rear hole edge of the hollow roll bar object; (e) when the hollow roll bar object is pushed and moved leftward and reaches a predetermined length of the cutting position, the material pushing and feeding plate stops pushing and feeding the material, and the left tapered head moves rightward to expand the outer diameter of the left expandable head, and at this time, the outer diameter of the right expandable head also remains expanded; (f) repeating the above steps (a) to (e) multiple times until all the cuts in the hollow roll bar object are completed; This includes the steps: How to cut a hollow roll bar object.

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