Device and method for preparing variable-density flat plate preform

Abstract

The invention discloses a device and a method for preparing a variable-density flat plate preform. Firstly, the two sides of the multi-angle fiber cloth felt are unreeled at the same time, then two roller felting needles conduct up-down rotating opposite needling on the two sides of the multi-angle fiber cloth felt, the two multi-angle fiber cloth felt needled layers are connected together, the two multi-angle fiber cloth felt needled layers serve as a base layer, then fiber cloth felt bodies are laid on the two sides of the base layer, and the multi-angle fiber cloth felt is formed. And repeatedly rotating and needling up and down back and forth by using a roller needling needle to form a variable-density flat plate prefabricated body with four unit layers, and repeating the steps according to the unit layers and density requirements required by the prefabricated body to finally prepare the variable-density flat plate prefabricated body based on the multi-angle fiber cloth felt. The preparation device comprises an unwinding component, a needling component, a radial transmission component, a translation component and a support module, needling preparation of the variable-density flat plate prefabricated body is carried out through a two-side rolling needling method, layer connection of the flat plate prefabricated body is greatly improved, and the production efficiency of the flat plate prefabricated body is improved in a multiplied mode.

Description

Technical Field

[0001] The present application relates to the technical field of production equipment, and in particular to a device and method for preparing a variable-density flat plate preform. Background Art

[0002] Most of the existing flat preform needling equipment consists of a horizontal trawl board and needling components. During production, the preform needs to be placed flat on the trawl board for needling, which is more susceptible to the downward pressure of the needling component and the upward support force of the trawl board. It is more suitable for the preparation of high and single-density flat preforms.

[0003] In the current production method, since the device is placed horizontally, under the action of gravity, the thickness of the lower preform is easily compressed, resulting in a higher density, while the upper preform still has the preset density. This makes it impossible to produce the expected uniform density preform.

[0004] Furthermore, due to changes in production requirements, different densities are required on the same flat plate preform in actual production. Currently, there is only one way, which is to press a low-density flat plate preform onto a high-density flat plate preform, and it cannot be done the other way around. Otherwise, the bottom flat plate preform, which should have been low-density, will be further compressed, shifting the original density. Under the premise that uniform density is difficult to ensure, the process difficulty and preparation difficulty of variable-density flat plate preforms are even more difficult to overcome. Summary of the invention

[0005] The present invention provides a device and method for preparing a variable-density flat plate preform, which can be used to solve the technical problem that the variable-density flat plate preform cannot be prepared in the prior art.

[0006] The present invention provides a device for preparing a variable-density flat plate preform, the device comprising:

[0007] The preparation device includes an unwinding bearing assembly I, an unwinding roller, a lead screw I, an unwinding bearing assembly II, a bracket, a lead screw II, a lead screw nut, a nut roller connecting piece, a roller bearing, a needle roller, a radial displacement motor, a coupling I, a gear steering gear I, a connecting rod I, a coupling II, a gear steering gear II, a translation base, a radial displacement bearing assembly I, a radial displacement bearing assembly II, a suspension frame, a flattening roller I, a flattening roller II, a flattening roller fixing frame, a gear steering gear III, a coupling III, a connecting rod II, a slide rail slider module, a rack, a gear, and a translation motor;

[0008] The preparation device is a symmetrical structure, with the same structure on both sides, and either side is mounted on a corresponding translation base;

[0009] The unwinding bearing assembly I includes two identical unwinding bearings I; the unwinding bearing assembly II includes two identical unwinding bearings II; each unwinding bearing I corresponds to an unwinding bearing II;

[0010] Wherein: the unwinding bearing assembly I and the unwinding bearing assembly II are fixed above the bracket, and the unwinding roller is horizontally installed between the unwinding bearing assembly I and the unwinding bearing assembly II;

[0011] Two screw rods Ⅰ are arranged vertically, one end of which is installed together with radial displacement bearing assembly Ⅰ and fixed on the suspension frame through a nut, and the other end is installed in the gear steering gear Ⅲ; the suspension frame is arranged beside the unwinding bearing assembly Ⅰ and the unwinding bearing assembly Ⅱ; the gear steering gear Ⅲ is arranged on the translation base;

[0012] A gear steering gear III is arranged on one side of the gear steering gear I, and a gear steering gear II is arranged on the other side; wherein the gear steering gear III is fastened with the connecting rod II through the coupling III, and the connecting rod II is installed in the gear steering gear I; similarly, the connecting rod I is installed on the other side of the gear steering gear I, and is connected to the gear steering gear II through the coupling II;

[0013] The radial translation motor is connected to the input end of the gear steering gear I through the coupling I;

[0014] The screw rod II is installed in the same way as the screw rod I, with both ends being installed in the gear steering gear II and the unwinding bearing assembly II respectively.

[0015] Furthermore, the translation base is installed on two sets of slide rail slider modules, and the extension direction of the slide rail slider module is perpendicular to the extension direction of the unwinding roller; the slide rail slider module enables the entire device to move along the extension direction; the rack is fixed to the translation base, parallel to the slide rail slider module, and inputs power to the translation base through the gear and the translation motor;

[0016] The screw nut is installed between the screw rod I and the screw rod II, and is fixed to the needling roller through the nut roller connecting piece;

[0017] The axis of the acupuncture drum is horizontal, the acupuncture drum rotates through the drum bearing, and the needles are evenly arranged and installed on the acupuncture drum;

[0018] The flattening rollers I and II are installed in the middle of the bracket through the flattening roller fixing frame. The unwinding rollers and needle cylinders on both sides must be kept at the same level.

[0019] Furthermore, the screw rod I is used to drive the roller needle to move up and down;

[0020] The unwinding speed of the unwinding roller can be adjusted and the rotation speed is uniform.

[0021] Furthermore, the needle has a certain inclination of 45° and a length ranging from 2 to 3 mm.

[0022] Furthermore, the gear steering gear transmission ratio is all 1:1.

[0023] The present invention also provides a method for preparing a variable-density flat plate preform, which is implemented based on the device provided by the present invention and comprises:

[0024] Step 1: First, load the two rolled felts onto the unwinding rollers respectively, and introduce one end of the felts between the two flattening rollers to flatten and fit the felts on both sides together;

[0025] Step 2: Pull the felts on both sides vertically down to the bottom of the device so that the felts are placed between the two roller needles. Then the radial displacement motor is started to rotate the lead screw and drive the roller needles to move to the top.

[0026] Step 3: Start the translation motor, and the gear rack module drives the roller needles on both sides to fit on the cloth felt, leaving enough space for the needles to pierce;

[0027] Step 4: After the preparation work is completed, the radial displacement motor is started again to drive the roller needle to roll the felt from top to bottom to needle-puncture the two felts, so that the two felts are connected by needle-puncture to form a preform. Then the clamping device is started and clamps the upper end of the preform, and the felt is cut short;

[0028] Step 5: Repeat step 1 and place two pieces of felt on both sides of the preform respectively; repeat step 4 for rolling needling, so that the two new pieces of felt are connected to both sides of the preform by needling layers, forming two new unit layers;

[0029] Step 6: When the volume density of the preform needs to be increased, the translation motor is started to drive the needle roller to step toward each other to increase the relative needling depth of the preform; and the speed of the radial displacement motor is slowed down to reduce the up and down displacement speed of the needle roller and reduce the relative displacement speed of the preform and the needle, thereby increasing the needling density;

[0030] Step 7: When the volume density of the preform needs to be reduced, the translation motor is started to drive the needle drum to step relatively, thereby reducing the relative needling depth of the preform; and the speed of the radial displacement motor is increased, the up and down displacement speed of the needle drum is increased, and the relative displacement speed of the preform and the needle is increased, thereby reducing the needling density; so as to reduce the density of the preform;

[0031] Through the adjustment of step 6 and step 7, the volume density of the preform can be adjusted steplessly, thereby meeting the preparation requirements of the variable density preform.

[0032] Step 8: Repeat the process of shortening the top of the new felt and re-clamping it, and repeat steps 5, 6, and 7 until all the unit layers are needle-punched to form a complete preform.

[0033] Furthermore, the surface density of the felt in step 1 can be adjusted, and the density range is 136g / m2 to 450g / m2.

[0034] Furthermore, after the cloth felt in step 1 passes through the flattening roller, the surface is uniform and wrinkle-free.

[0035] Furthermore, the cloth felt in step 1 is pre-punctured and connected with two layers of mesh and a layer of fiber cloth to form a sandwich structure of mesh net;

[0036] The felt can be pre-covered with fiber yarn and pre-needled.

[0037] Furthermore, the preform in step 4 may include absorbing felt, prepreg and other materials to replace the cloth felt during the preparation process.

[0038] Compared with the prior art, the significant improvements of the present invention are: 1. The present invention realizes the production and preparation of flat preforms with stepless variable density; 2. The present invention can realize the preparation of ultra-long and ultra-wide flat preforms; 3. The present invention can realize the simultaneous needling preparation on both sides of the flat preform, which greatly improves the product production efficiency and competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A diagram of a variable density flat plate preform preparation device provided in an embodiment of the present invention;

[0040] Figure 2 A front view provided for an embodiment of the present invention;

[0041] Figure 3 A top view provided for an embodiment of the present invention;

[0042] Figure 4 A side view provided for an embodiment of the present invention;

[0043] The accompanying drawings are marked as follows: unwinding bearing assembly Ⅰ1, unwinding roller 2, screw rod Ⅰ3, unwinding bearing assembly Ⅱ4, bracket 5, screw rod Ⅱ6, screw nut 7, nut roller connecting piece 8, roller bearing 9, acupuncture roller 10, needle 11, radial displacement motor 12, coupling Ⅰ13, gear steering gear Ⅰ14, connecting rod Ⅰ15, coupling Ⅱ16, gear steering gear Ⅱ17, translation base 18, radial displacement bearing assembly Ⅰ19, radial displacement bearing assembly Ⅱ20, suspension frame 21, flattening roller Ⅰ22, flattening roller Ⅱ23, flattening roller fixing frame 24, gear steering gear Ⅲ25, coupling Ⅲ26, connecting rod Ⅱ27, slide rail slider module 28, rack 29, gear 30, translation motor 31. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0045] The present invention provides a preparation device for a variable-density flat plate preform, which comprises an unwinding bearing assembly I1, an unwinding roller 2, a screw rod I3, an unwinding bearing assembly II4, a bracket 5, a screw rod II6, a screw nut 7, a nut roller connector 8, a roller bearing 9, a needling roller 10, a needle 11, a radial displacement motor 12, a coupling I13, a gear steering gear I14, a connecting rod I15, a coupling II16, a gear steering gear II17, a translation base 18, a radial displacement bearing assembly I19, a radial displacement bearing assembly II20, a suspension frame 21, a flattening roller I22, a flattening roller II23, a flattening roller fixing frame 24, a gear steering gear III25, a coupling III26, a connecting rod II27, a slide rail slider module 28, a rack 29, a gear 30, and a translation motor 31.

[0046] The preparation device is a symmetrical structure, with the same structure on both sides, and either side is mounted on a corresponding translation base 18;

[0047] The unwinding bearing assembly Ⅰ1 includes two identical unwinding bearings Ⅰ; the unwinding bearing assembly Ⅱ4 includes two identical unwinding bearings Ⅱ; each unwinding bearing Ⅰ corresponds to an unwinding bearing Ⅱ;

[0048] Among them, the unwinding bearing assembly Ⅰ1 and the unwinding bearing assembly Ⅱ4 are fixed above the bracket 5, and the unwinding roller 2 is horizontally installed between the unwinding bearing assembly Ⅰ1 and the unwinding bearing assembly Ⅱ4;

[0049] Two screw rods Ⅰ3 are arranged vertically, one end of which is installed together with the radial displacement bearing assembly Ⅰ19 and fixed on the suspension frame 21 through a nut, and the other end is installed in the gear steering gear Ⅲ25; the suspension frame 21 is arranged beside the unwinding bearing assembly Ⅰ1 and the unwinding bearing assembly Ⅱ4; the gear steering gear Ⅲ25 is arranged on the translation base 18;

[0050] A gear steering gear III 25 is arranged on one side of the gear steering gear I 14, and a gear steering gear II 17 is arranged on the other side; wherein the gear steering gear III 25 is fastened with a connecting rod II 27 through a coupling III 26, and the connecting rod II 27 is installed in the gear steering gear I 14; similarly, the connecting rod I 15 is installed on the other side of the gear steering gear I 14, and is connected to the gear steering gear II 17 through a coupling II 16;

[0051] The radial translation motor 12 is connected to the input end of the gear steering device Ⅰ 14 through the coupling Ⅰ 13;

[0052] The screw rod Ⅱ6 is installed in the same way as the screw rod Ⅰ3, with both ends installed in the gear steering gear Ⅱ17 and the unwinding bearing assembly Ⅱ4 respectively;

[0053] The translation base 18 is installed on two sets of slide rail slider modules 28, and the extension direction of the slide rail slider module 28 is perpendicular to the extension direction of the unwinding roller 2; the slide rail slider module 28 enables the entire device to move along the extension direction; the rack 29 is fixed to the translation base 18, parallel to the slide rail slider module 28, and inputs power to the translation base 18 through the gear 30 and the translation motor 31;

[0054] The screw nut 7 is installed between the screw rod I3 and the screw rod II6, and is fixed to the needling roller 10 through the nut roller connector 8;

[0055] The axis of the acupuncture drum 10 is in the horizontal direction, and the acupuncture drum 10 rotates through the drum bearing 9, and the needles 11 are evenly arranged and installed on the acupuncture drum 10;

[0056] The flattening roller I 22 and the flattening roller II 23 are installed in the middle of the bracket 5 through the flattening roller fixing frame 24. The unwinding rollers and needle rollers on both sides must be kept at the same level to prevent the preform from being deformed due to inconsistent laying speed of the unit layer and misalignment of the needle.

[0057] The screw rod Ⅰ3 is used to drive the roller needle to move up and down, and the moving mode includes but is not limited to transmission devices such as a worm gear, a gear rack, a slider rail, etc.

[0058] The unwinding speed of the unwinding roller 2 can be adjusted and the rotation speed is uniform.

[0059] The lead screw nut 7 is a designed processed part and has a certain bearing capacity.

[0060] The needle 11 has a certain slope of 45° and a short length ranging from 2 to 3 mm.

[0061] The gear steering gear ratio is all 1:1.

[0062] The radial displacement motor 12 and the translation motor 31 are both reduction motors.

[0063] The present invention also provides a method for preparing a variable-density flat plate preform, comprising the following steps:

[0064] Step 1: First, load the two rolled felts onto the unwinding rollers respectively, and introduce one end of the felts between the two flattening rollers to flatten and fit the felts on both sides together.

[0065] Step 2: Pull the felts on both sides vertically down to the bottom of the device so that the felts are placed between the two roller needles. Then the radial displacement motor is started to rotate the lead screw and drive the roller needles to move to the top.

[0066] Step 3: Start the translation motor, and the gear rack module drives the roller needles on both sides to fit on the cloth felt, leaving enough space for the needles to pierce.

[0067] Step 4: After the preparation work is completed, start the radial displacement motor again to drive the roller needle to roll and needle the cloth felt from top to bottom, so that the two pieces of cloth felt are connected by needles to form a preform. Then the clamping device starts and clamps the upper end of the preform, and cuts the cloth felt short.

[0068] Step 5: Repeat step 1 and place two pieces of cloth felt on both sides of the preform respectively; repeat step 4 for rolling needling, so that the two new pieces of cloth felt are connected to both sides of the preform by needling layers, forming two new unit layers.

[0069] Step 6: When the volume density of the preform needs to be increased, the translation motor is started to drive the needle roller to step toward each other to increase the relative needling depth of the preform; and the speed of the radial displacement motor is slowed down, the up and down displacement speed of the needle roller is reduced, and the relative displacement speed of the preform and the needle is reduced, thereby increasing the needling density; so as to increase the density of the preform.

[0070] Step 7: When the volume density of the preform needs to be reduced, the translation motor is started to drive the needle drum to step relatively, thereby reducing the relative needling depth of the preform; and the speed of the radial displacement motor is increased, the up and down displacement speed of the needle drum is increased, and the relative displacement speed of the preform and the needle is increased, thereby reducing the needling density; so as to reduce the density of the preform;

[0071] Through the adjustment of step 6 and step 7, the volume density of the preform can be adjusted steplessly, thereby meeting the preparation requirements of the variable density preform.

[0072] Step 8: Repeat the process of shortening the top of the new felt and re-clamping it, and repeat steps 5, 6, and 7 until all the unit layers are needle-punched to form a complete preform.

[0073] The surface density of the felt in step 1 is adjustable, and the density range is 136g / m2 to 450g / m2.

[0074] After the felt in step 1 passes through the flattening roller, the surface is even and wrinkle-free.

[0075] The cloth felt in step 1 is pre-punctured and connected with two layers of mesh and a layer of fiber cloth to form a sandwich structure of mesh net;

[0076] The cloth felt can be pre-covered with fiber yarns and pre-needled to increase the long fiber content of the preform weight.

[0077] The fiber cloth contained in the cloth felt in step 1 is any one or more of quartz plain cloth, quartz satin cloth, quartz twill cloth, carbon fiber widened cloth, carbon fiber satin cloth, and carbon fiber unidirectional cloth.

[0078] The preform in step 4 can be prepared into a steplessly variable density flat plate preform by adjusting the surface density of the fiber cloth and the web in each felt unit layer.

[0079] The preform in step 4 may include absorbing felt, prepreg and other materials to replace the cloth felt during the preparation process to form a flat preform with different properties.

[0080] The above embodiments of the present invention do not limit the protection scope of the present invention.

Claims

1. A device for preparing a variable density flat plate preform, characterized in that: The device comprises: The preparation device comprises an unwinding bearing assembly I (1), an unwinding roller (2), a screw rod I (3), an unwinding bearing assembly II (4), a bracket (5), a screw rod II (6), a screw nut (7), a nut roller connecting piece (8), a roller bearing (9), a needling roller (10), a needle (11), a radial displacement motor (12), a coupling I (13), a gear steering gear I (14), a connecting rod I (15), a coupling II (16), a gear steering gear II (17), a translation base (18), a radial displacement bearing assembly I (19), a radial displacement bearing assembly II (20), a suspension frame (21), a flattening roller I (22), a flattening roller II (23), a flattening roller fixing frame (24), a gear steering gear III (25), a coupling III (26), a connecting rod II (27), a slide rail and slider module (28), a rack (29), a gear (30), and a translation motor (31); The preparation device is a symmetrical structure, with the structures on both sides being the same, and either side being mounted on a corresponding translation base (18); The unwinding bearing assembly I (1) includes two identical unwinding bearings I; the unwinding bearing assembly II (4) includes two identical unwinding bearings II; each unwinding bearing I corresponds to an unwinding bearing II; Wherein: the unwinding bearing assembly I (1) and the unwinding bearing assembly II (4) are fixed above the bracket (5), and the unwinding roller (2) is horizontally installed between the unwinding bearing assembly I (1) and the unwinding bearing assembly II (4); Two screw rods Ⅰ (3) are vertically arranged, one end of which is installed together with the radial displacement bearing assembly Ⅰ (19) and fixed on the suspension frame (21) through a nut, and the other end is installed in the gear steering gear Ⅲ (25); the suspension frame (21) is arranged beside the unwinding bearing assembly Ⅰ (1) and the unwinding bearing assembly Ⅱ (4); the gear steering gear Ⅲ (25) is arranged on the translation base (18); A gear steering gear III (25) is arranged on one side of the gear steering gear I (14), and a gear steering gear II (17) is arranged on the other side; wherein the gear steering gear III (25) is fastened to a connecting rod II (27) through a coupling III (26), and the connecting rod II (27) is installed in the gear steering gear I (14); similarly, the connecting rod I (15) is installed on the other side of the gear steering gear I (14), and is connected to the gear steering gear II (17) through a coupling II (16); The radial translation motor (12) is connected to the input end of the gear steering device I (14) through a coupling I (13); The screw rod II (6) is installed in the same manner as the screw rod I (3), with its two ends respectively installed in the gear steering gear II (17) and the unwinding bearing assembly II (4).

2. The device for preparing a variable density flat plate preform according to claim 1, characterized in that: The translation base (18) is installed on two sets of slide rail slider modules (28), and the extension direction of the slide rail slider module (28) is perpendicular to the extension direction of the unwinding roller (2); the slide rail slider module (28) enables the entire device to move along the extension direction; the rack (29) is fixed to the translation base (18), is parallel to the slide rail slider module (28), and inputs power to the translation base (18) through the gear (30) and the translation motor (31); The screw nut (7) is installed between the screw rod I (3) and the screw rod II (6), and is fixed to the needling roller (10) through the nut roller connecting piece (8); The axis of the acupuncture drum (10) is in the horizontal direction, the acupuncture drum (10) rotates through the drum bearing (9), and the needles (11) are evenly arranged and installed on the acupuncture drum (10); The flattening roller I (22) and the flattening roller II (23) are installed in the middle of the bracket (5) through the flattening roller fixing frame (24). The unwinding rollers and the needle cylinders on both sides must be kept at the same level.

3. The device for preparing a variable density flat plate preform according to claim 1, characterized in that: The screw rod I (3) is used to drive the roller needle to move up and down; The unwinding speed of the unwinding roller (2) is adjustable and the rotation speed is uniform.

4. The device for preparing a variable density flat plate preform according to claim 1, characterized in that: The needle (11) has a certain slope of 45° and a length ranging from 2 to 3 mm.

5. The device for preparing a variable density flat plate preform according to claim 1, characterized in that: The gear steering gear transmission ratio is all 1:

1.

6. A method for preparing a variable density flat plate preform, characterized in that: The method is implemented based on any one of the devices in claims 1 to 5, and the method includes: Step 1: First, load the two rolled felts onto the unwinding rollers respectively, and introduce one end of the felts between the two flattening rollers to flatten and fit the felts on both sides together; Step 2: Pull the felts on both sides vertically down to the bottom of the device so that the felts are placed between the two roller needles. Then the radial displacement motor is started to rotate the lead screw and drive the roller needles to move to the top. Step 3: Start the translation motor, and the gear rack module drives the roller needles on both sides to fit on the cloth felt, leaving enough space for the needles to pierce; Step 4: After the preparation work is completed, the radial displacement motor is started again to drive the roller needle to roll the felt from top to bottom to needle-puncture the two felts, so that the two felts are connected by needle-puncture to form a preform. Then the clamping device is started and clamps the upper end of the preform, and the felt is cut short; Step 5: Repeat step 1 and place two pieces of felt on both sides of the preform respectively; repeat step 4 for rolling needling, so that the two new pieces of felt are connected to both sides of the preform by needling layers, forming two new unit layers; Step 6: When the volume density of the preform needs to be increased, the translation motor is started to drive the needle roller to step toward each other to increase the relative needling depth of the preform; and the speed of the radial displacement motor is slowed down to reduce the up and down displacement speed of the needle roller and reduce the relative displacement speed of the preform and the needle, thereby increasing the needling density; Step 7: When the volume density of the preform needs to be reduced, the translation motor is started to drive the needle drum to step relatively, thereby reducing the relative needling depth of the preform; and the speed of the radial displacement motor is increased, the up and down displacement speed of the needle drum is increased, and the relative displacement speed of the preform and the needle is increased, thereby reducing the needling density; so as to reduce the density of the preform; Through the adjustment of step 6 and step 7, the volume density of the preform can be adjusted steplessly, thereby meeting the preparation requirements of the variable density preform. Step 8: Repeat the process of shortening the top of the new felt and re-clamping it, and repeat steps 5, 6, and 7 until all the unit layers are needle-punched to form a complete preform.

7. The method for preparing a variable density flat plate preform according to claim 6, characterized in that: The surface density of the felt in step 1 can be adjusted, and the density range is 136g / m2 to 450g / m2.

8. The method for preparing a variable density flat plate preform according to claim 6, characterized in that: After the cloth felt in step 1 passes through the flattening roller, the surface is uniform and wrinkle-free.

9. The method for preparing a variable density flat plate preform according to claim 6, characterized in that: The cloth felt in step 1 is pre-punctured and connected by two layers of mesh and a layer of fiber cloth to form a sandwich structure of mesh net; The felt can be pre-covered with fiber yarn and pre-needled.

10. The method for preparing a variable density flat plate preform according to claim 6, characterized in that: The preform in step 4 can be replaced with absorbing felt, prepreg or other materials in the preparation process.

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