A method and apparatus for cutting a preform

Abstract

The application discloses a kind of preform cutting method and device, device includes rotary shaft (1), cutting support (2), axial movement track (3), height self-adapting adjusting device (4) and cutting execution mechanism, cutting execution mechanism includes track mark and identification system (5) and preform adaptive cutting device (6), rotary shaft (1) is used to erect preform, the bottom of cutting support (2) is connected with rotary shaft (1), top is provided with axial movement track (3), the top of height self-adapting adjusting device (4) is slidably connected with axial movement track (3), bottom is connected with track mark and identification system (5) and preform adaptive cutting device (6), height self-adapting adjusting device (4) can be adjusted height along vertical direction.The present application realizes that preform is formed after completion, and effective area mark accuracy is greatly improved, to thereby reduce the influence to preform use.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of textiles, and particularly relates to a preform cutting method and device. BACKGROUND

[0002] In the prior art, after the preform is formed, effective area marking and cutting need to be performed on the surface of the preform. The traditional marking method can only be completed by using conventional measuring tools such as a ruler in cooperation with a round knife or an art knife, which is not only inaccurate in position marking, but also cannot realize space curve or random curve drawing, thereby affecting the use of the preform. SUMMARY

[0003] The present application aims to provide a preform cutting method and device to solve the problem of preform effective area marking after the preform is formed.

[0004] In order to achieve the object of the present application, the present application provides the following technical solutions:

[0005] A preform cutting device comprises a rotating shaft, a cutting support, an axial movement track, a height self-adapting adjusting device and a cutting execution mechanism, the cutting execution mechanism comprises a track marking and identifying system and a preform adaptive cutting device,

[0006] The rotating shaft is used for erecting the preform, the bottom of the cutting support is connected with the rotating shaft, and the top is provided with the axial movement track, the top of the height self-adapting adjusting device is slidably connected with the axial movement track, and the bottom is connected with the track marking and identifying system and the preform adaptive cutting device, the axial movement track is arranged in parallel with the rotating shaft, and the height self-adapting adjusting device can be adjusted in height along the vertical direction.

[0007] Further, the height self-adapting adjusting device comprises a support, a spring, a pressure sensor, a sliding block, a counterweight and an electromagnet, the top end of the support is slidably connected with the axial movement track, the inside of the top end of the support is mounted with the spring along the vertical direction, the lower end of the spring is connected with the sliding block, the lower end of the sliding block is connected with the counterweight, the inside of the bottom of the support is mounted with the electromagnet, and the electromagnet is located below the counterweight.

[0008] Further, the track marking and identifying system and the preform adaptive cutting device are respectively located on the two sides of the bottom of the height self-adapting adjusting device.

[0009] Further, the track marking and identifying system comprises a dynamic height adjusting device, a preform marking head and a track identifying device, the preform marking head is located at the bottom of the dynamic height adjusting device, the track identifying device is provided with a visual identifying system, the visual identifying system can identify the position of the marking line and the position of the cutter, and can monitor whether the cutter deviates in real time.

[0010] Further, the prefabricated body adaptive cutting device comprises a cutting mode conversion device, a low-density prefabricated body cutting device, a medium-density prefabricated body cutting device, and a high-density prefabricated body cutting device, wherein the low-density prefabricated body cutting device, the medium-density prefabricated body cutting device, and the high-density prefabricated body cutting device are connected to the cutting mode conversion device, and the cutting mode conversion device can realize the conversion of the three cutting devices.

[0011] Further, the low-density prefabricated body cutting device comprises a prefabricated body cutting round knife and a prefabricated body profile maintaining device, the medium-density prefabricated body cutting device comprises a medium-density prefabricated body cutting tool and a medium-density fiber cutting device, and the high-density prefabricated body cutting device comprises a tool pressure control device, a high-density prefabricated body cutting tool, and a high-density fiber cutting device.

[0012] Further, the cutting execution mechanism further comprises a tool deviation correction system, which is arranged on one side of the prefabricated body adaptive cutting device and comprises a laser emitter and a visual recognition device. The tool deviation correction system can emit laser light behind the cutting tool and simultaneously perform visual collection. The laser light produces a bending on the surface of the prefabricated body, and the visual recognition device collects the laser light information, analyzes the laser light information, judges whether the cutting surface meets the cutting requirements, and if there is an unqualified condition, an alarm will be given, and the cutting tool will be fed back for deviation correction or re-cutting.

[0013] Further, the control system is used for controlling the rotation of the prefabricated body along the rotary shaft, receiving the pressure signal and feeding back the electromagnet signal, height adjustment of the height self-adaptive adjusting device, setting the prefabricated body cutting mode, cutting tool conversion, cutting path planning deviation correction, and integrated control of the visual system.

[0014] According to the cutting method of the prefabricated body cutting device,

[0015] The cutting mode includes three modes: one is circumferential cutting, the cutting execution mechanism is adjusted to a suitable circumferential mark line position, the control system is started to start the rotary shaft, and the pressure sensor is used to monitor the pressure in real time during the operation to ensure that the prefabricated body adaptive cutting device blade is always in a state capable of cutting off the prefabricated body and does not affect the shape of other positions of the prefabricated body, and the circumferential cutting is completed after one rotation of the rotary shaft; two is axial cutting, the cutting execution mechanism is adjusted to a suitable axial mark line position, the control system is started to make the height self-adaptive adjusting device move along the axial movement track, and the pressure sensor is used to monitor the pressure in real time during the operation to ensure that the prefabricated body adaptive cutting device blade is always in a state capable of cutting off the prefabricated body and does not affect the shape of other positions of the prefabricated body, and the axial cutting is completed after the prefabricated body from one end to the other end; three is a space curve, the cutting execution mechanism is adjusted to the starting position of the mark line, the control system is started to make the height self-adaptive adjusting device move along the axial movement track and the rotary shaft rotates, and the pressure sensor is used to monitor the pressure in real time during the operation to ensure that the prefabricated body adaptive cutting device blade is always in a state capable of cutting off the prefabricated body and does not affect the shape of other positions of the prefabricated body, and the space curve is completed after the operation to the end position;

[0016] During the cutting process, the volume density and the structure of the prefabricated body are first determined, and the operation program is set according to the structure, one is to select a low, medium or high cutting device according to the volume density of the prefabricated body, and two is to determine which cutting mode to use according to the actual cutting position and shape,

[0017] When the device is started, the trajectory marking function is used, the starting point is set, the device is started, the device adjusts the prefabricated body marking head position according to the surface pressure, ensures that the prefabricated body marking head contacts but does not affect the surface of the prefabricated body, until the cutting position of the prefabricated body is set, after the marking is completed, the device is switched to the prefabricated body cutting function, the visual recognition system detects the mark line position to ensure that the device runs along the mark line, during the cutting process, different cutting tools or different cutting methods are used according to the volume density of the prefabricated body, the prefabricated body is cut in depth step by step, and the prefabricated body is ensured not to affect the profile precision and internal quality during the cutting, and the cutter correction system works synchronously during the cutting of the prefabricated body, the cutter correction system emits laser to the rear of the cutter, the visual recognition device monitors the laser deformation, the laser information is used to judge whether the prefabricated body cutting surface meets the requirements, if there is deviation, the feedback system is fed back and the cutter is adjusted

[0018] Compared with the prior art, the significant progress of the present application is that: 1) the present application is aimed at low, medium and high density preforms, and uses profile maintenance, fiber cutting and cutting surface visual detection and other methods to improve the applicability and cutting accuracy of the device; 2) the present application greatly improves the accuracy of effective area identification after the preform is formed, thereby reducing the influence on the use of the preform. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings described herein are used to provide further understanding of the present application, constitute a part of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0020] Figure 1 It is a front view of the preform cutting device.

[0021] Figure 2 It is a perspective view of the preform cutting device.

[0022] Figure 3 It is a schematic view of the height self-adaptive adjusting device and the cutting execution mechanism.

[0023] Figure 4 It is a schematic view of the height self-adaptive adjusting device.

[0024] Figure 5 It is a trajectory identification and recognition system diagram.

[0025] Figure 6 It is a preform adaptive cutting device diagram.

[0026] Figure 7 It is a cutter deviation correction system diagram.

[0027] Figure 8 It is a low-density preform cutting device diagram.

[0028] Figure 9 It is a medium-density preform cutting device diagram.

[0029] Figure 10 It is a high-density preform cutting device diagram.

[0030] The reference signs in the drawings are:

[0031] 1-rotary shaft; 2-cutting support; 3-axial movement track; 4-height self-adaptive adjusting device; 5-track identification and recognition system; 6-preform adaptive cutting device; 7-tool deviation correction system; 41-support; 42-spring; 43-pressure sensor; 44-sliding block; 45-counterweight; 46-electromagnet; 51-dynamic height adjusting device; 52-preform identification head; 53-track identification device; 61-cutting mode conversion device; 62-low-density preform cutting device; 63-medium-density preform cutting device; 64-high-density preform cutting device; 71-laser emitter; 72-vision recognition device; 621-preform cutting circular knife; 622-preform profile maintaining device; 631-medium-density preform cutting tool; 632-medium-density fiber cutting device; 641-tool pressure control device; 642-high-density preform cutting tool; 643-high-density fiber cutting device. DETAILED DESCRIPTION

[0032] In combination Figures 1-4 A preform cutting device, comprising a rotary shaft 1, a cutting support 2, an axial movement track 3, a height self-adaptive adjusting device 4, and a cutting execution mechanism, the cutting execution mechanism comprising a track identification and recognition system 5, a preform adaptive cutting device 6, and a tool deviation correction system 7. The cutting support 2 is erected on the preform rotary shaft 1, and the cutting execution mechanism contacts the preform surface by using the height self-adaptive adjusting device 4. The preform rotary shaft 1 is rotated, and the cutting execution mechanism slides on the preform surface to form a circumferential marking line on the preform. At the same time, the height self-adaptive adjusting device 4 can move axially on the preform to form an axial marking line. Meanwhile, the position moving device (including height adjusting and horizontal adjusting functions) can rotate and axially move in linkage according to instructions to form a track with a certain angle or curve equation. The cutting track line is identified before cutting, and the cutting track is planned in advance. In the cutting process, the cutting device 6 identifies the track line through visual detection to ensure the accuracy of the cutting direction. Different cutting devices are installed for different bulk densities of the preform. For low-density preforms, cutting profile maintaining protection is performed. For medium-density preforms, internal fiber secondary cutting is performed to ensure internal quality. For high-density preforms, tool position pressure fixation and preform cutting surface visual detection are performed to ensure the accuracy of the cutting surface.

[0033] The cutting support 2 can match the preform rotary shaft 1 and match the preform reference datum. The device datum and the preform reference datum are accurately matched to ensure accurate positioning during cutting.

[0034] In combination Figures 3-4, height self-adapting adjusting device 4 is vertically placed, spring 42 is installed on upper end of sliding block 44 and is pulled, lower end is made into counterweight 45, according to pressure size, pressure is adjusted by changing the number of counterweights below.The number of counterweights changes in the following way: a plurality of electromagnets 46 are arranged below sliding block 44, when the pressure is small, a plurality of electromagnets 46 are energized, attract counterweight 45, increase the counterweight, when the pressure is large, electromagnet 46 is de-energized, releases counterweight 45, reduces the counterweight.

[0035] The most important thing for preform cutting is the correct trajectory, and the preform cutting device is divided into trajectory identification and recognition system 5 and cutting device 6.

[0036] In combination Figure 5 , trajectory identification and recognition system 5 is divided into trajectory identification device and trajectory recognition device, wherein the identification device adopts a dynamic height adjusting identification head, which can identify the position on the surface of the preform and reserve the identification line. During the identification process, the identification head adopts a pressure sensing method, and the position is coarsely adjusted by the dynamic height adjusting device 51, and then the height position of the identification head is finely adjusted by the elastic identification member of the identification head 52, to ensure the dynamic adjustment position, so that the identification head does not affect the preform profile during identification, and a clear trajectory line can be left. The visual recognition system of the trajectory recognition device identifies the position of the identification line and the position of the cutter, and monitors whether the cutter advances position deviates in real time, and if there is deviation, the system is fed back to finely adjust the position of the cutter, to ensure the correctness of the cutting line of the cutter.

[0037] In combination Figure 6 , the cutting device of the preform is adaptively cut 6, and different cutting methods are selected according to different thicknesses, different bulk densities and different organizational structures of the preform. In this embodiment, the bulk density range is: low-density preform 0-0.3g / cm 3 , medium-density preform 0.3-0.7g / cm 3 , high-density preform greater than 0.7g / cm 3 .

[0038] In combination Figure 8 , for low-density preform, in order to prevent affecting the thickness of the fabric and the cutting surface during cutting, the cutting device is equipped with a preform profile maintaining device 622, which is installed behind the cutter 621 and attached to the surface of the preform. By means of vacuum negative pressure, a certain profile maintaining force is provided, which can ensure that the profile can still maintain the original position after cutting is completed. Step-by-step cutting method is adopted during cutting, and lower cutting thickness is set each time to prevent damage to the profile caused by cutting.

[0039] In combination Figure 9, for the medium density preform, to prevent it from not being completely cut off or easily bringing out the fiber during cutting, the medium density fiber cutting device 632 is added behind the cutter, which cooperates with the medium density preform cutting cutter to clean the internal fiber of the preform that is not completely cut off, preventing internal damage to the preform due to fiber entanglement of the cutter during cutting.

[0040] In combination Figure 10 , for the high-density preform, in addition to increasing the high-density fiber cutting device 643, it is also necessary to prevent the path from deviating and the cutting surface from tilting due to the high density of the preform during cutting, and to pressurize the cutter during cutting to ensure the stability of the cutter during cutting.

[0041] In order to ensure the stability of the preform cutting surface, a cutter deviation correction system 7 (such as Figure 7 ) is added on one side of the preform adaptive cutting device 6, which includes a laser emitter 71 and a visual recognition device 72, to ensure that the cutter does not deviate and tilt inside the preform. During the cutting process of the cutter, the cutter deviation correction system 7 will emit laser light behind the cutter during cutting, and at the same time, visual collection will be carried out. The laser light will bend on the surface of the preform, and the system will collect laser information, analyze the laser information, and determine whether the cutting surface meets the cutting requirements and is flat. If there is an unqualified condition, an alarm will be given, and the cutter will be fed back for deviation correction or re-cutting.

[0042] For the gradient variable density preform, a convertible cutter head is designed, and a cutter conversion instruction is set. Different cutting devices are used in different density layers.

[0043] The axial motion track can connect the two ends of the cutting support, and the linear module is mounted on the top. The height self-adaptive adjustment device is installed on the linear module. At the same time, the linear module is provided with a scale indicating the distance, which can accurately and timely observe the position information.

[0044] The control system is mainly responsible for rotating the preform along the rotation axis, receiving the pressure signal and feeding back the electromagnet signal, and converting the spatial curve into a combination of rotation and axial motion according to the required curve, realizing the drawing of the spatial curve, and realizing the cutting of the spatial curve. In addition, the control system is also responsible for setting the preform cutting mode, cutting cutter conversion, cutting path planning deviation correction and integration control of the visual system.

[0045] In the running process, first install and fix the cutting support 2 at both ends of the preform rotating shaft 1, and match with the preform reference datum. Then set up the axial movement track 3 in the middle, and ensure that the axial movement track 3 is parallel to the rotating shaft. Install the cutting execution mechanism to the self-adaptive height adjusting device 4, and then install the height adjusting device 4 on the linear module of the axial movement track 3, and complete the device installation. There are three kinds of usage: one is circumferential cutting, adjust the cutting execution mechanism to the appropriate circumferential marking line position, start the rotating shaft by opening the control system, and monitor the pressure size in real time through the pressure sensor 43 in the running process to ensure that the cutting device blade is always in the state of cutting off the preform, and does not affect the shape of other positions of the preform, and complete the circumferential cutting after one revolution of the rotating shaft 1. Two is axial cutting, adjust the cutting execution mechanism to the appropriate axial marking line position, start the linear module by opening the control system, and monitor the pressure size in real time through the pressure sensor 43 in the running process to ensure that the cutting device blade is always in the state of cutting off the preform, and does not affect the shape of other positions of the preform, and complete the axial cutting after reaching the other end. Three is spatial curve, adjust the cutting execution mechanism to the starting position of the marking line, start the linear module and the rotating shaft by opening the control system, and monitor the pressure size in real time through the pressure sensor in the running process to ensure that the cutting device blade is always in the state of cutting off the preform, and does not affect the shape of other positions of the preform, and complete the spatial curve drawing after running to the end position.

[0046] The cutting process is divided into trajectory identification, preform cutting and cutting correction. In the implementation process, first determine the bulk density and organizational structure of the preform, set the operation procedure according to the structure, and determine two parts of the specific operation procedure, one is to determine the use of low, medium and high cutting devices according to the bulk density, and the other is to determine which cutting mode to use according to the actual cutting position and shape, for example, the cutting of the two end annular areas adopts the circumferential cutting mode, the axial cutting mode for the axial cutting mode, and the space curve mode for the special shape with space curve. When the device starts, it is converted into a trajectory identification device, the starting point is set, the device is started, the identification head position is adjusted according to the surface pressure to ensure that the identification head contacts but does not affect the surface of the preform, until the preform cutting position is set. After the identification is completed, the device switches to the preform cutting function, the visual detection device detects the position of the identification line after the device is started to ensure that the device runs along the identification line. During the cutting process, the device converts the cutting mode of the device according to the bulk density of the preform, and cuts the preform by using different cutters or different cutting methods, and ensures that the preform does not affect the profile accuracy and internal quality during cutting. When the preform is cut, the cutting correction device works synchronously, the correction device emits laser to the rear of the cutter, the visual system monitors the laser deformation, judges whether the preform cutting surface meets the requirements according to the laser deformation, if there is deviation, the feedback system will be adjusted.

[0047] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A preform cutting apparatus characterized by, The utility model relates to a cutting device for prefabricated body, including rotary shaft (1), cutting support (2), axial movement track (3), height self -adaptation adjusting device (4) and cutting executive mechanism, cutting executive mechanism includes track mark and identification system (5) and prefabricated body adaptive cutting device (6), Rotary shaft (1) is used for erecting prefabricated body, the bottom of cutting support (2) is connected with rotary shaft (1), the top is provided with axial movement track (3), the top of height self -adaptation adjusting device (4) is slidably connected with axial movement track (3), the bottom is connected with track mark and identification system (5) and prefabricated body adaptive cutting device (6), axial movement track (3) is arranged in parallel with rotary shaft (1), height self -adaptation adjusting device (4) can adjust height along vertical direction; Track mark and identification system (5) include dynamic height adjusting device (51), prefabricated body mark head (52), track identification device (53), prefabricated body mark head (52) is located at the bottom of dynamic height adjusting device (51), track identification device (53) is provided with visual identification system, and visual identification system can identify mark line position and cutter position, and real -time monitoring whether cutter advancing position deviates; Prefabricated body adaptive cutting device (6) includes cutting mode conversion device (61), low density prefabricated body cutting device (62), medium density prefabricated body cutting device (63), high density prefabricated body cutting device (64), low density prefabricated body cutting device (62), medium density prefabricated body cutting device (63), high density prefabricated body cutting device (64) are all connected to cutting mode conversion device (61), and cutting mode conversion device (61) can realize the conversion of three cutting devices; Height self -adaptation adjusting device (4) includes support (41), spring (42), pressure sensor (43), sliding block (44), counterweight (45) and electromagnet (46), the top end outside of support (41) is slidably connected with axial movement track (3), and the top end inside of support (41) is installed with spring (42) along vertical direction, the lower end of spring (42) is connected with sliding block (44), the lower end of sliding block (44) is connected with counterweight (45), the bottom inner surface of support (41) is installed with electromagnet (46), and electromagnet (46) is located below counterweight (45); The cutting device further comprises a cutter deviation correction system (7) disposed on one side of the prefabricated body adaptive cutting device (6), which includes a laser emitter (71) and a visual identification device (72). The cutter deviation correction system (7) can emit laser light behind the cutter after cutting and simultaneously perform visual acquisition. The laser light generates a bending on the surface of the prefabricated body. The visual identification device (72) acquires laser information, analyzes the laser information, determines whether the cutting surface meets the cutting requirements, and if there is an unqualified condition, an alarm is prompted and the cutter is fed back for deviation correction or re-cutting.

2. The preform cutting apparatus of claim 1, wherein, The trajectory identification and recognition system (5) and the preform adaptive cutting device (6) are respectively located at the bottom of the height self-adaptive adjusting device (4) on both sides.

3. The preform trimming apparatus of claim 1 wherein, The low-density preform cutting device (62) comprises a preform cutting circular cutter (621) and a preform profile maintaining device (622), the medium-density preform cutting device (63) comprises a medium-density preform cutting cutter (631) and a medium-density fiber cutting device (632), and the high-density preform cutting device (64) comprises a cutter pressure control device (641), a high-density preform cutting cutter (642) and a high-density fiber cutting device (643).

4. The preform trimming apparatus of claim 1 wherein, The control system is further included for controlling the rotation of the preform along the rotary shaft (1), receiving the pressure signal and feeding back the electromagnet signal, height adjustment of the height self-adaptive adjusting device (4), setting the preform cutting mode, cutting cutter switching, cutting path planning correction and integrated control of the visual system.

5. A cutting method of the preform cutting device of claim 4, characterized in that, The cutting mode comprises three kinds: one is circumferential cutting, the cutting execution mechanism is adjusted to the appropriate circumferential marking line position, the control system is started to start the rotary shaft (1), the pressure sensor (43) is used to monitor the pressure in real time during the operation to ensure that the preform adaptive cutting device (6) cutter is always in a state capable of cutting off the preform and does not affect the shape of other positions of the preform, and the circumferential cutting is completed after one revolution of the rotary shaft (1); two is axial cutting, the cutting execution mechanism is adjusted to the appropriate axial marking line position, the control system is started to make the height self-adaptive adjusting device (4) move along the axial movement track (3), the pressure sensor (43) is used to monitor the pressure in real time during the operation to ensure that the preform adaptive cutting device (6) cutter is always in a state capable of cutting off the preform and does not affect the shape of other positions of the preform, and the axial cutting is completed after the preform from one end to the other end; three is a space curve, the cutting execution mechanism is adjusted to the starting position of the marking line, the control system is started to make the height self-adaptive adjusting device (4) move along the axial movement track (3) and the rotary shaft (1) rotate, the pressure sensor (43) is used to monitor the pressure in real time during the operation to ensure that the preform adaptive cutting device (6) cutter is always in a state capable of cutting off the preform and does not affect the shape of other positions of the preform, and the space curve is completed after running to the end position; During the cutting process, the volume density and organizational structure of the preform are first determined, and the operation program is set according to the structure, one is to select the low, medium and high cutting devices for cutting according to the volume density of the preform, and two is to determine which cutting mode to use according to the actual cutting position and shape, When the device starts, the trajectory identification function is used, the identification starting point is set, the device is started, the device adjusts the position of the preform identification head (52) according to the surface pressure condition, ensures that the preform identification head (52) contacts but does not affect the preform surface, until the preform set cutting position is completed, after the identification is completed, the device switches to the preform cutting function, the visual identification system detects the position of the identification line, ensures that the device runs along the identification line, in the cutting process, according to the volume density of the preform, different cutters or different cutting methods are used, the preform is cut in depth step-by-step, ensures that the preform does not affect the profile accuracy and internal quality during cutting, during the cutting of the preform, the cutter correction system (7) works synchronously, the cutter correction system (7) emits laser to the rear of the cutter, the visual identification device (72) monitors the laser deformation condition, judges whether the preform cutting surface meets the requirements according to the laser information, if there is deviation, the feedback system will be adjusted and the cutter will be adjusted.

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