A mold positioning device for a three-dimensional structure braiding machine

Abstract

The present application discloses a mold positioning device for a three-dimensional structure braiding machine, which includes a frame, a transverse clamping assembly for clamping the mold from both sides of the mold is provided on the frame, and a vertical pressing mechanism for pressing the mold toward the transverse clamping assembly is also provided on the frame; the vertical pressing mechanism includes a positioning sleeve for cooperating with the lifting and lowering movement of the mold, and a yielding portion is provided on the peripheral wall of the positioning sleeve. When the positioning sleeve moves in a direction away from the mold, the mold passes through the yielding portion through the winding line connected to the top thereof to leave the positioning sleeve. The present application first clamps the mold from both sides of the mold through the transverse clamping assembly, and then uses the positioning sleeve to press the mold toward the transverse clamping assembly, thereby improving the influence of the instability of the mold on the braiding quality in the initial stage. After braiding a certain length, the positioning sleeve retracts upward, and then the transverse clamping assembly releases the mold, and the winding line passes through the yielding portion to bring the mold away from the positioning sleeve, which has the effect of positioning the mold in the three-dimensional structure braiding machine.

Description

Technical Field

[0001] The present application relates to the field of weaving of wire bands of specific shapes, and in particular to a mold positioning device for a three-dimensional structure weaving machine. Background Art

[0002] Developed in the 1970s, three-dimensional braided composites are a new type of high-performance composite material. Using 3D braiding technology, high-performance fibers are woven into complex, integral preforms for use in reinforcing various matrices, such as resin, carbon, ceramic, and metal. Compared to laminated composite manufacturing processes, 3D braided structures offer superior interlayer properties and characteristics, making them suitable for manufacturing structural and high-performance components. They have been widely used in key technologies for China's aerospace and weaponry industries.

[0003] Reference Figure 1 In the related art, a three-dimensional structure braiding machine includes a spindle 11 for fixing the bobbin, a carriage 12 for forming the braiding path, a mold, and a wire take-up device 13. By setting a mold above the carriage 12 and a wire take-up device 13 above the mold, the braiding wire is partially confined on the mold, one end of the mold is connected to the winding wire of the wire take-up device 13, and the braiding wire bobbin is fixed on the spindle 11. The spindle 11 is routed along the braiding path of the carriage 12 to perform the braiding operation.

[0004] With respect to the above-mentioned related technologies, the inventors found that the three-dimensional structure braiding machine in the related technologies would produce large shaking during operation, affecting the quality of the finished product, and this problem was particularly serious in the initial weaving section, which urgently needs to be improved. Summary of the Invention

[0005] In order to position the mold during the weaving process of three-dimensional structure webbing, the present application provides a mold positioning device for a three-dimensional structure weaving machine.

[0006] The present application provides a mold positioning device for a three-dimensional structure braiding machine using the following technical solutions:

[0007] A mold positioning device for a three-dimensional structure braiding machine includes a frame, the frame is provided with a horizontal clamping assembly for clamping the mold from both sides of the mold, and the frame is also provided with a vertical pressing mechanism for pressing the mold toward the horizontal clamping assembly; the vertical pressing mechanism includes a positioning sleeve for cooperating with the lifting and lowering movement of the mold, and a yield portion is provided on the peripheral wall of the positioning sleeve. When the positioning sleeve moves in a direction away from the mold, the mold passes through the yield portion through the winding line connected to its top and leaves the positioning sleeve.

[0008] By adopting the above technical solution, when working, the transverse clamping assembly first clamps the mold from both sides of the mold, and then uses the positioning sleeve in the vertical pressing mechanism to extend and retract toward the mold to press the mold toward the transverse clamping assembly. The positioning sleeve abuts against the top of the mold, so that the mold is stabilized between the transverse clamping assembly, which improves the impact of mold instability on the weaving quality in the initial stage. After weaving a certain length, the mold gradually stabilizes under the constraints of the winding wire at its top and the three-dimensional weaving wire that has been woven and formed below it. The positioning sleeve retracts upward, and then the transverse clamping assembly releases the mold. The winding wire connected to the top of the mold passes through the yielding part and brings the mold away from the positioning sleeve, which has the effect of positioning the mold in the three-dimensional structure weaving machine.

[0009] Optionally, the transverse clamping assembly includes a first clamping plate, a second clamping plate and a first driving member, the first clamping plate and the second clamping plate are respectively located on both sides of the mold, and the first driving member drives the first clamping plate and the second clamping plate to move closer to or away from each other.

[0010] By adopting the above technical solution, the first driving member drives the first clamping plate and the second clamping plate to move closer to or away from each other, thereby clamping or loosening the mold, which is easy to implement.

[0011] Optionally, a first bayonet is provided at an end of the first clamping plate close to the second clamping plate, and a second bayonet is provided at an end of the second clamping plate close to the first clamping plate.

[0012] By adopting the above technical solution, the first clamping piece and the second clamping piece are close to each other, and the mold is positioned in the gap formed by the intersection of the first clamping opening and the second clamping opening.

[0013] Optionally, the vertical pressing mechanism also includes a lifting assembly that drives the positioning sleeve to rise and fall, and a translation assembly that drives the positioning sleeve to translate; the translation assembly includes a support block slidably mounted on the frame and a second drive member that drives the support block to slide on the frame; the lifting assembly is mounted on the support block, and the positioning sleeve is mounted at the output end of the lifting assembly.

[0014] By adopting the above technical solution, the support block is slidably installed on the frame, the lifting assembly is installed on the support block, and the positioning sleeve is installed on the output end of the lifting assembly, driving the positioning sleeve to press the mold toward the horizontal clamping assembly. After weaving a certain length, the lifting assembly drives the positioning sleeve to retract upward, and the second drive member drives the lifting assembly to move horizontally, helping the winding line connected to the top of the mold to pass through the yielding part and bring the mold away from the positioning sleeve.

[0015] Optionally, the lifting assembly includes a mounting seat, a screw rotatably connected to the mounting seat, a third driving member for driving the screw to rotate, and a lifting block threadedly engaged with the screw and limited by the mounting seat, the mounting seat is arranged on the supporting block, and the positioning sleeve is installed on the lifting block.

[0016] By adopting the above technical solution, the supporting block is slidably installed on the frame, the lifting assembly is installed on the supporting block, the positioning sleeve is installed on the lifting block in the lifting assembly, the third driving member drives the screw to rotate, and the lifting block is lifted and lowered along the axial direction of the screw to press the mold toward the horizontal clamping assembly. After weaving a certain length, the lifting block drives the positioning sleeve to retract upward, and the second driving member drives the lifting assembly to move horizontally, helping the winding line connected to the top of the mold to pass through the yielding part and bring the mold away from the positioning sleeve.

[0017] Optionally, a retaining ring is provided in the positioning sleeve, and a retaining outlet is correspondingly provided on a side of the retaining ring facing the retracting portion.

[0018] By adopting the above technical solution and coordinating the retaining ring and the clearance outlet, the area where the positioning sleeve contacts the top of the mold can be increased, thereby improving the pressing strength.

[0019] Optionally, the diameter of the inner circumferential wall of the retaining ring gradually decreases along the retraction direction of the positioning sleeve.

[0020] By adopting the above technical solution, it can also be applied to molds with slightly smaller cross-sections, thereby improving the applicability of the device.

[0021] Optionally, a plurality of connecting plates are provided at intervals on the outer peripheral wall of the retaining ring, and one end of the connecting plate away from the retaining ring is fixedly connected to the positioning sleeve.

[0022] By adopting the above technical solution, the burden of the device can be reduced as much as possible while ensuring the connection strength between the retaining ring and the positioning sleeve.

[0023] Optionally, the transverse clamping assembly is mounted on the frame via an adjusting assembly, the adjusting assembly includes a fourth driving member fixed to the frame and a loading plate arranged at the telescopic end of the fourth driving member, and the transverse clamping assembly is mounted on the loading plate.

[0024] By adopting the above technical solution, different molds are used, the three-dimensional structure of the weaving ribbon and the number of ribbon strands are different, so the time required to clamp and position the mold will be different, and the mold will rise as the weaving and winding work proceeds, that is, the height of the horizontal clamping component can be adjusted according to the different weaving lengths by using the adjustment component.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. During operation, the transverse clamping assembly first clamps the mold from both sides, and then uses the positioning sleeve in the vertical pressing mechanism to extend and retract toward the mold to press the mold toward the transverse clamping assembly. The positioning sleeve abuts against the top of the mold, stabilizing the mold between the transverse clamping assembly, improving the impact of mold instability on weaving quality in the initial stage. After weaving a certain length, the mold gradually stabilizes under the constraints of the winding wire at its top and the woven three-dimensional structure webbing below it. The positioning sleeve retracts upward, and then the transverse clamping assembly releases the mold. The winding wire connected to the top of the mold passes through the yielding part and brings the mold away from the positioning sleeve, which has the effect of positioning the mold in the three-dimensional structure weaving machine;

[0027] 2. Slide the support block onto the frame, install the lifting assembly onto the support block, and install the positioning sleeve onto the lifting block in the lifting assembly. The third drive member drives the screw to rotate, and the lifting block rises and falls along the screw axis, pressing the mold toward the horizontal clamping assembly. After weaving a certain length, the lifting block drives the positioning sleeve to retract upward, and the second drive member drives the lifting assembly to move horizontally, helping the winding wire connected to the top of the mold to pass through the yielding part and move the mold away from the positioning sleeve.

[0028] 3. Through the coordinated setting of the retaining ring and the clearance outlet, the area between the positioning sleeve and the top of the mold can be increased, and the pressing strength can be improved. The inner wall diameter of the retaining ring gradually decreases along the retraction direction of the positioning sleeve, which can also be applied to molds with slightly smaller cross-sections, thereby improving the applicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a three-dimensional structure braiding machine in the related art;

[0030] Figure 2 This is a schematic diagram of the overall structure of the embodiment of the present application in use;

[0031] Figure 3 Schematic diagram of the vertical pressing mechanism structure in an embodiment of the present application;

[0032] Figure 4 This is a schematic cross-sectional view showing the internal structure of the positioning sleeve in the embodiment of the present application;

[0033] Figure 5 is a schematic diagram of the structure of the transverse clamping assembly and the adjustment assembly in the embodiment of the application;

[0034] Figure 6 This is a schematic diagram showing the structure of the first splint and the second splint in an embodiment of the present application.

[0035] Figure markings: 1. Frame; 2. Horizontal clamping assembly; 21. First clamping plate; 22. Second clamping plate; 23. First driving member; 3. Vertical pressing mechanism; 31. Positioning sleeve; 311. Yielding portion; 32. Lifting assembly; 321. Mounting seat; 322. Screw; 323. Third driving member; 324. Lifting block; 33. Translation assembly; 331. Support block; 332. Second driving member; 4. First bayonet; 5. Second bayonet; 7. Retaining ring; 8. Yielding outlet; 9. Connecting plate; 10. Adjusting assembly; 101. Fourth driving member; 102. Loading plate; 11. Running spindle; 12. Running platform; 13. Wire-taking device. DETAILED DESCRIPTION

[0036] The following is combined with Figure 2-6 This application is described in further detail.

[0037] An embodiment of the present application discloses a mold positioning device for a three-dimensional structure braiding machine.

[0038] Reference Figure 2 A mold positioning device for a three-dimensional structure braiding machine includes a frame 1, a transverse clamping assembly 2, and a vertical pressing mechanism 3. The transverse clamping assembly 2 clamps the mold from both sides, and the vertical pressing mechanism 3 on the frame 1 presses the mold toward the transverse clamping assembly 2.

[0039] Reference Figure 3 The vertical pressing mechanism 3 includes a positioning sleeve 31 for cooperating with the mold to move up and down, a lifting component 32 for driving the positioning sleeve 31 to move up and down, and a translation component 33 for driving the positioning sleeve 31 to move horizontally.

[0040] Reference Figure 2 and Figure 3 A yield portion 311 is provided on the peripheral wall of the positioning sleeve 31. The yield portion 311 is a long strip opening provided on the peripheral wall of the positioning sleeve 31, and the opening penetrates the peripheral wall of the positioning sleeve 31 axially on the positioning sleeve 31. When the positioning sleeve 31 moves in a direction away from the mold, the mold leaves the positioning sleeve 31 through the yield portion 311 via the winding wire connected to the top thereof. The lifting assembly 32 includes a mounting seat 321, a screw rod 322 rotatably connected to the mounting seat 321, a third driving member 323 driving the screw rod 322 to rotate, and a lifting block 324 threadedly engaged with the screw rod 322 and limited by the mounting seat 321. The limiting can be achieved by slotting or by passing a guide rod. The third driving member 323 is a motor, and the end of the screw rod 322 passing through the mounting seat 321 is fixed to the output shaft of the motor. The translation assembly 33 includes a support block 331 slidably mounted on the frame 1 and a second driving member 332 driving the support block 331 to slide on the frame 1. The second driving member 332 is a cylinder, and the support block 331 and the telescopic end of the second driving member 332 are plugged and fixed.

[0041] When the cam 324 is in the unlock state, the locking cam 326 is in the unlock state, and the locking cam 327 is in the unlock state, so that the locking cam 327 is locked and the winch cam 328 is locked.

[0042] Reference Figure 3 and Figure 4 A retaining ring 7 is provided in the positioning sleeve 31. A plurality of connecting plates 9 are provided at intervals on the outer peripheral wall of the retaining ring 7. The end of the connecting plate 9 away from the retaining ring 7 is fixedly connected to the positioning sleeve 31. The inner peripheral wall diameter of the retaining ring 7 gradually decreases along the retraction direction of the positioning sleeve 31. A corresponding yielding outlet 8 is provided on the side of the retaining ring 7 facing the yielding portion 311. The yielding outlet 8 is a long strip opening provided on the peripheral wall of the retaining ring 7, and the opening penetrates the peripheral wall of the retaining ring 7 axially in the retaining ring 7. The yielding portion 311, the retaining ring 7, the connecting plates 9, and the positioning sleeve 31 are integrally formed. By coordinating the retaining ring 7 and the yielding outlet 8, the area of ​​contact between the positioning sleeve 31 and the top of the mold can be increased, thereby improving the pressing strength. The inner peripheral wall diameter of the retaining ring 7 gradually decreases along the retraction direction of the positioning sleeve 31, making it applicable to molds with slightly smaller cross-sections, thereby improving the scope of application of the device.

[0043] Reference Figure 5 The transverse clamping assembly 2 is mounted on the frame 1 via an adjustment assembly 10. The adjustment assembly 10 includes a fourth drive member 101 fixed to the frame 1 via bolts and a carrier plate 102 plugged into and fixed to the telescopic end of the fourth drive member 101. Preferably, the fourth drive member 101 is a pneumatic cylinder, and there are two fourth drive members 101. The two ends of the carrier plate 102 are respectively fixed to the telescopic ends of the two fourth drive members 101. The telescopic direction of the fourth drive member 101 is perpendicular to the clamping direction of the transverse clamping assembly 2. The transverse clamping assembly 2 is mounted on the carrier plate 102 so that the height of the transverse clamping assembly 2 can be adjusted according to the different braiding lengths.

[0044] Reference Figure 5 and Figure 6The transverse clamping assembly 2 includes a first clamping plate 21, a second clamping plate 22 and a first driving member 23. Preferably, the first driving member 23 is a cylinder, and the number of the first driving members 23 is two. The two first driving members 23 are respectively fixed at the two ends of the carrier plate 102, and the telescopic ends of the two first driving members 23 are respectively fixed with the first clamping plate 21 and the second clamping plate 22. The fixing method can be selected by welding, bonding or fixing by threaded connection. The first clamping plate 21 and the second clamping plate 22 are respectively located on both sides of the mold, and the first driving member 23 drives the first clamping plate 21 and the second clamping plate 22 to move closer to or away from each other, thereby clamping or loosening the mold. A first bayonet 4 is formed at the end of the first clamping plate 21 close to the second clamping plate 22, and a second bayonet 5 is formed at the end of the second clamping plate 22 close to the first clamping plate 21. After the first clamping plate 21 and the second clamping plate 22 are close to each other, the first bayonet 4 and the second bayonet 5 clamp the mold from both sides to strengthen the strength of the mold positioning during initial weaving.

[0045] The present invention relates to a mold positioning device for a three-dimensional structure braiding machine. The first driving member 23 drives the first clamping plate 21 and the second clamping plate 22 to clamp the mold from both sides. The third driving member 323 then drives the screw 322 to rotate. The lifting block 324 moves axially along the screw 322, pressing the mold toward the transverse clamping assembly 2. The positioning sleeve 31 abuts against the top of the mold, stabilizing the mold between the transverse clamping assembly 2 and the mold, thereby improving the effect of mold instability on the braiding quality during the initial stage. The adjustment assembly 10 can adjust the height of the transverse clamping assembly 2 according to the braiding length. After braiding a certain length, the mold gradually stabilizes under the constraints of the winding wire at its top and the braided three-dimensional structure braid below it. The positioning sleeve 31 retracts upward, and then the transverse clamping assembly 2 releases the mold. The translation assembly 33 translates the positioning sleeve 31, helping the winding wire connected to the top of the mold to pass through the clearance portion 311 and remove the mold from the positioning sleeve 31, thereby effectively positioning the mold in the three-dimensional structure braiding machine. A retaining ring 7 and a clearance outlet 8 are provided in the positioning sleeve 31 to increase the contact area between the positioning sleeve 31 and the top of the mold, thereby improving the pressing strength and expanding the application range of the device.

[0046] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A mold positioning device for a three-dimensional structure braiding machine, characterized in that: The invention comprises a frame (1), wherein the frame (1) is provided with a transverse clamping assembly (2) for clamping the mold from both sides of the mold, and the frame (1) is also provided with a vertical pressing mechanism (3) for pressing the mold toward the transverse clamping assembly (2); the vertical pressing mechanism (3) comprises a positioning sleeve (31) for cooperating with the lifting and lowering movement of the mold, and a yielding portion (311) is provided on the peripheral wall of the positioning sleeve (31), and when the positioning sleeve (31) moves in a direction away from the mold, the mold passes through the yielding portion (311) through the winding line connected to the top of the positioning sleeve (31) and leaves the positioning sleeve (31).

2. The mold positioning device for a three-dimensional structure braiding machine according to claim 1, characterized in that: The transverse clamping assembly (2) comprises a first clamping plate (21), a second clamping plate (22) and a first driving member (23), wherein the first clamping plate (21) and the second clamping plate (22) are respectively located on two sides of the mold, and the first driving member (23) drives the first clamping plate (21) and the second clamping plate (22) to move closer to or away from each other.

3. The mold positioning device for a three-dimensional structure braiding machine according to claim 2, characterized in that: A first bayonet (4) is provided at the end of the first clamping plate (21) close to the second clamping plate (22), and a second bayonet (5) is provided at the end of the second clamping plate (22) close to the first clamping plate (21).

4. The mold positioning device for a three-dimensional structure braiding machine according to claim 1, characterized in that: The vertical pressing mechanism (3) further comprises a lifting assembly (32) for driving the positioning sleeve (31) to rise and fall, and a translation assembly (33) for driving the positioning sleeve (31) to translate; the translation assembly (33) comprises a support block (331) slidably mounted on the frame (1) and a second driving member (332) for driving the support block (331) to slide on the frame (1); the lifting assembly (32) is mounted on the support block (331), and the positioning sleeve (31) is mounted at the output end of the lifting assembly (32).

5. The mold positioning device for a three-dimensional structure braiding machine according to claim 4, characterized in that: The lifting assembly (32) includes a mounting seat (321), a screw (322) rotatably connected to the mounting seat (321), a third driving member (323) for driving the screw (322) to rotate, and a lifting block (324) threadedly engaged with the screw (322) and limitedly engaged with the mounting seat (321). The mounting seat (321) is arranged on the supporting block (331), and the positioning sleeve (31) is installed on the lifting block (324).

6. The mold positioning device for a three-dimensional structure braiding machine according to claim 1, characterized in that: A retaining ring (7) is provided in the positioning sleeve (31), and a retaining ring (7) is provided with a corresponding retaining outlet (8) on one side facing the retaining ring (311).

7. The mold positioning device for a three-dimensional structure braiding machine according to claim 6, characterized in that: The diameter of the inner peripheral wall of the retaining ring (7) gradually decreases along the retraction direction of the positioning sleeve (31).

8. The mold positioning device for a three-dimensional structure braiding machine according to claim 6, characterized in that: A plurality of connecting plates (9) are arranged at intervals on the outer peripheral wall of the retaining ring (7), and one end of the connecting plate (9) away from the retaining ring (7) is fixedly connected to the positioning sleeve (31).

9. The mold positioning device for a three-dimensional structure braiding machine according to claim 1, characterized in that: The transverse clamping assembly (2) is mounted on the frame (1) via an adjusting assembly (10). The adjusting assembly (10) comprises a fourth driving member (101) fixed to the frame (1) and a loading plate (102) arranged at a telescopic end of the fourth driving member (101). The transverse clamping assembly (2) is mounted on the loading plate (102).

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