Novel preform numerical control needling machine

Abstract

The invention discloses a novel preform numerical control needling machine, and belongs to the field of needling machines. A novel preform numerical control needling machine comprises an equipment main body, the equipment main body comprises a first needling mechanism, a second needling mechanism and a tip locking mechanism, the equipment main body further comprises a rotating mechanism used for installing and driving a crucible preform to rotate, and the rotating mechanism comprises a lower box body and an upper box body which are detachably connected; a plurality of mounting grooves are formed in the lower box body; the outer sheath is fixedly connected to the upper box body, a rotating shaft is rotatably arranged in the outer sheath, and the rotating shaft and the outer sheath are coaxially arranged; the rotating shaft is cooled in real time, thermal deformation of the rotating shaft is prevented, the amplitude of the rotating shaft is detected through hydraulic pressure of cooling liquid, and the situation that the machining quality of crucible preforms of the current batch is affected due to the fact that the amplitude of the rotating shaft is too large is effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of acupuncture machine technology, and in particular to a novel prefabricated CNC acupuncture machine. Background Technology

[0002] In modern industrial manufacturing, composite materials, with their superior properties such as high strength, low density, and high corrosion resistance, have gradually become indispensable basic materials for many high-end industries. As a key piece of equipment in the composite material manufacturing process, the preform CNC needle punching machine undertakes the important task of processing fiber materials into preforms with specific structures and properties. Its performance directly affects the quality and production efficiency of composite materials.

[0003] The rotating mechanism of current needle punching machines mainly consists of a spindle box, a rotating shaft, and a chuck mechanism. The rotating shaft is subjected to long-term load operation, which generates heat through friction and makes it prone to micro-deformation. As the usage time increases, the vibration amplitude of the rotating shaft will gradually increase, which may greatly affect the stability of the preform rotation, thereby affecting its needle punching effect and ultimately impacting the quality of the composite material. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a novel prefabricated CNC needle punching machine that can overcome or at least partially solve the above problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A novel preform CNC needle punching machine includes: a main body comprising a first needle punching mechanism, a second needle punching mechanism, and a top locking mechanism; a rotating mechanism for mounting and driving the crucible preform to rotate, the rotating mechanism comprising a detachably connected lower housing and an upper housing, the lower housing having multiple mounting slots; an outer sheath fixedly connected to the upper housing, with a rotating shaft rotatably mounted inside the outer sheath, the rotating shaft being coaxial with the outer sheath; a spindle box disposed on one side of the outer sheath, the output end of the spindle box being connected to the rotating shaft, the other end of the rotating shaft having a chuck mechanism; sealing components symmetrically disposed within the outer sheath, the sealing components being rotatably and sealingly connected to the rotating shaft, and the sealing components having a drainage unit; a cooling chamber disposed between the two sealing components; and a circulation component for circulating coolant into the cooling chamber.

[0006] In a preferred embodiment of the present invention, the sealing assembly includes elastic retaining rings symmetrically fixedly disposed within the outer sheath, wherein an inner ring of the elastic retaining ring is fixedly connected to a fitting retaining ring, and the drainage unit includes a liquid outlet disposed on the fitting retaining ring, wherein a flow-blocking nozzle is fixedly connected to the liquid outlet end.

[0007] In a preferred embodiment of the present invention, the circulation assembly includes a storage cavity disposed within the lower housing, a circulation pump disposed within the storage cavity, a liquid supply pipe disposed between one end of the pump and the cooling cavity, and a liquid extraction pipe disposed between the other end of the pump and the storage cavity, a first reflux cavity disposed between one of the elastic retaining rings and the chuck mechanism, and a second reflux cavity disposed between the other elastic retaining ring and the spindle box, both the first and second reflux cavities being provided with reflux pipes between them and the storage cavity, and a flared end of the reflux pipe near the outer sheath being provided with a flared opening, and a wind-cooled heat dissipation mechanism disposed on one side of the lower housing.

[0008] In a preferred embodiment of the present invention, a dividing ring is symmetrically arranged between the two elastic retaining rings, a buffer gap is provided between the dividing ring and the rotating shaft, and a flow limiting mechanism is provided at the buffer gap.

[0009] In a preferred embodiment of the present invention, the current limiting component includes baffles symmetrically fixedly connected to the rotating shaft, and a micro gap is provided between the baffles and the dividing ring.

[0010] In a preferred embodiment of the present invention, the outer diameter of the baffle is larger than the inner diameter of the dividing ring, and a detection gap is provided between the outer edge of the baffle and the inner edge of the dividing ring, and a water pressure detection component is provided on one side of the cooling cavity.

[0011] In a preferred embodiment of the present invention, the water pressure detection assembly includes a detection box fixedly mounted on an outer sheath, and a pressure gauge is fixedly connected to the outer wall of the detection box.

[0012] In a preferred embodiment of the present invention, an elastic membrane is fixedly connected between the detection box and the cooling cavity.

[0013] In a preferred embodiment of the present invention, a spray pipe communicating with a liquid supply pipe is provided in the cooling chamber, and a plurality of spray nozzles are symmetrically opened on the spray pipe, and the spray nozzles are distributed in a ring along the axis of the rotating shaft.

[0014] In a preferred embodiment of the present invention, support bearings are symmetrically arranged inside the outer sheath, and the length of the first reflux cavity is less than the length of the second reflux cavity.

[0015] Compared with the prior art, the present invention provides a novel prefabricated body CNC needle punching machine, which has the following beneficial effects: 1. This new type of prefabricated CNC needle punching machine cools the rotating shaft in real time by adding an appropriate amount of coolant into the storage chamber and then using a circulating pump to transport the coolant from the storage chamber to the cooling chamber, thus preventing thermal deformation.

[0016] 2. In this new type of prefabricated CNC needle punching machine, the coolant entering the cooling chamber flows towards the elastic baffles on both sides and finally flows out through the outlet. The coolant flowing out of the outlet is collected through the flared mouth and flows into the return pipe, eventually returning to the storage chamber for circulation. The air-cooled heat dissipation mechanism placed in the lower box dissipates heat from the coolant in the storage chamber in real time. The circulating coolant cools the rotating shaft in real time, which can effectively prevent the deformation of the rotating shaft from affecting the overall needle punching accuracy. The fitting baffles can act as a transfer medium, transferring some of the heat from the rotating shaft to the coolant, achieving large-area cooling and heat dissipation, improving its heat dissipation effect, and preventing the cool coolant from directly contacting the high-temperature rotating shaft, which could cause thermal stress cracks.

[0017] 3. This new type of prefabricated CNC needle punching machine, through the micro-gap between the dividing ring and the baffle, can restrict the outflow of coolant, allowing it to flow out stably under a certain water pressure. The coolant flows through the micro-gap into the buffer gap, and finally enters between the dividing ring and the elastic baffle. The coolant entering between the dividing ring and the elastic baffle reduces the impact force to a certain extent, and then flows out from the outlet, thus effectively preventing the lubricant from spraying out from the support bearing. In addition, the temperature of the coolant located between the elastic baffle and the dividing ring is higher than the temperature of the coolant in the cooling chamber, which has a temperature transition effect, further preventing thermal stress cracks in the rotating shaft.

[0018] 4. In this new type of preform CNC needle punching machine, the gap between the baffle and the dividing ring remains basically unchanged within the safe amplitude range. In addition, the vibration amplitude is less than the detection gap. When the vibration amplitude is greater than the detection gap, the outer edge of the baffle will move to the buffer gap, forming a larger flow channel. At this time, the water pressure in the cooling chamber will decrease. By detecting the water pressure, it can be determined in time whether the shaft amplitude is within the safe range, thus effectively avoiding the impact of excessive shaft amplitude on the processing quality of the current batch of crucible preforms.

[0019] The parts of the device not described herein are the same as or can be implemented using existing technologies. This invention prevents thermal deformation of the rotating shaft by real-time cooling and effectively avoids excessive shaft amplitude affecting the processing quality of the current batch of crucible preforms by detecting the amplitude of the rotating shaft through the hydraulic pressure of the coolant. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the rotating mechanism in the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the rotating mechanism in the present invention. Figure 2 ; Figure 4This is a cross-sectional schematic diagram of the reflux pipe in this invention; Figure 5 This is a cross-sectional schematic diagram of the liquid supply pipe in this invention; Figure 6 This is a cross-sectional view of the present invention. Figure 1 ; Figure 7 This is a partial structural diagram of the present invention; Figure 8 This is a cross-sectional view of the present invention. Figure 2 ; Figure 9 For the present invention Figure 8 Enlarged diagram of point A in the middle.

[0021] In the diagram: 1. Main body of the equipment; 101. First needle-piercing mechanism; 102. Second needle-piercing mechanism; 103. Top locking mechanism; 104. Crucible preform; 2. Rotation mechanism; 3. Lower housing; 301. Air-cooled heat dissipation mechanism; 302. Mounting slot; 303. Storage chamber; 304. Circulation pump; 305. Liquid extraction pipe; 306. Liquid supply pipe; 307. Liquid spraying pipe; 308. Liquid spraying nozzle; 4. Upper housing; 401. Main spindle box; 402. Rotating shaft; 403. 404 Chuck mechanism; 405 Return pipe; 405 Bell mouth; 5 Outer sheath; 501 Detection box; 502 Pressure gauge; 503 Elastic diaphragm; 504 Support bearing; 505 First return chamber; 506 Cooling chamber; 507 Second return chamber; 6 Dividing ring; 601 Buffer gap; 602 Baffle; 603 Micro gap; 604 Detection gap; 7 Elastic retaining ring; 701 Fitting retaining ring; 702 Liquid outlet; 703 Flow deflector. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] Example: Refer to Figures 1-9 A novel prefabricated CNC needle punching machine includes: a main body 1, which includes a first needle punching mechanism 101, a second needle punching mechanism 102 and a top locking mechanism 103; In a specific implementation, refer to Figure 1 The first needle-punching mechanism 101 is mainly used to needle the side of the crucible preform 104, while the two second needle-punching mechanisms 102 are mainly used to needle the left and right end faces of the crucible preform 104, thereby realizing all-round needle-punching of the crucible preform 104. The needle-punching direction of the second needle-punching mechanism 102 can be adjusted in multiple directions. Reference Figure 2A rotating mechanism 2 for installing and driving the crucible preform 104 to rotate, the rotating mechanism 2 includes a detachably connected lower box 3 and upper box 4, and the lower box 3 is provided with a plurality of mounting slots 302. Reference Figure 8 The outer sheath 5 is fixedly connected to the upper housing 4, and a rotating shaft 402 is rotatably installed inside the outer sheath 5. The rotating shaft 402 is coaxial with the outer sheath 5. Reference Figure 3 The spindle box 401 is located on one side of the outer sheath 5. The output end of the spindle box 401 is connected to the rotating shaft 402. The other end of the rotating shaft 402 is provided with a chuck mechanism 403, wherein the chuck mechanism 403 can be a manual chuck or a pneumatic chuck. Before performing needle punching on the crucible preform 104, the main shaft of the crucible preform 104 is installed on the chuck mechanism 403, and then the other end of the main shaft is limited by the center locking mechanism 103, so that the axis of the main shaft of the crucible preform 104 is collinear with the axis of the rotating shaft 402, thereby ensuring its stable rotation and improving the accuracy of needle punching. However, in actual use, since the rotating shaft 402 needs to operate for a long time, it may heat up due to friction or other factors during long-term operation, which may easily cause thermal deformation, which may lead to the rotation of the crucible preform 104 being offset, affecting its needle punching effect. To address the issue of overheating in the 402 rotating shaft, the following implementation method can be adopted, as described below. Figure 4-6 It includes a sealing assembly, which is symmetrically arranged inside the outer sheath 5, and the sealing assembly is rotatably connected to the rotating shaft 402, and a drainage unit is provided on the sealing assembly; Cooling chamber 506 is disposed between two sealing components; The sealing assembly includes elastic retaining rings 7 symmetrically fixedly disposed within the outer sheath 5, wherein the inner ring of the elastic retaining ring 7 is fixedly connected to a fitting retaining ring 701, and the drainage unit includes a liquid outlet 702 disposed on the fitting retaining ring 701, and a flow-blocking nozzle 703 is fixedly connected to the liquid outlet 702. Its sealing assembly is formed by two elastic retaining rings 7 and a fitting retaining ring 701, and forms a cooling chamber 506 with a stable liquid outlet 702; A circulation assembly for circulating coolant into the cooling chamber 506; Reference Figure 5The circulation assembly includes a storage chamber 303 located in the lower housing 3. A circulation pump 304 is installed in the storage chamber 303. A liquid supply pipe 306 is installed between one end of the pump and the cooling chamber 506, and a liquid extraction pipe 305 is installed between the other end of the pump and the storage chamber 303. A first return chamber 505 is installed between one elastic retaining ring 7 and the chuck mechanism 403, and a second return chamber 507 is installed between the other elastic retaining ring 7 and the spindle box 401. Return pipes 404 are installed between the first return chamber 505 and the second return chamber 507 and the storage chamber 303. A flared end 405 is installed at the end of the return pipe 404 near the outer sheath 5. A wind-cooled heat dissipation mechanism 301 is installed on one side of the lower housing 3.

[0024] In a preferred embodiment, by adding an appropriate amount of coolant into the storage cavity 303, and then using a circulation pump 304 to transport the coolant from the storage cavity 303 to the cooling cavity 506, the rotating shaft 402 is cooled in real time to prevent thermal deformation. During the actual cooling process, the coolant entering the cooling chamber 506 flows towards the elastic baffles 7 on both sides and finally flows out through the outlet 702. The coolant flowing out through the outlet 702 is collected through the flared mouth 405 and flows into the return pipe 404, eventually returning to the storage chamber 303 for circulation. The air-cooled heat dissipation mechanism 301 placed in the lower box 3 dissipates heat from the coolant in the storage chamber 303 in real time. The circulating coolant cools the rotating shaft 402 in real time, which can effectively prevent the deformation of the rotating shaft 402 from affecting the overall needle-piercing accuracy.

[0025] In addition, during the actual cooling process, the fitting retaining ring 701 can act as a transfer medium to transfer some of the heat of the rotating shaft 402 to the coolant, thereby achieving large-area cooling and heat dissipation, improving its heat dissipation effect, and preventing the cool coolant from directly contacting the high-temperature rotating shaft 402, which could cause thermal stress cracks.

[0026] To ensure that the cooling chamber 506 is completely filled with coolant, the following implementation method can be adopted. In a specific implementation method, refer to... Figure 8 and Figure 9 A dividing ring 6 is symmetrically arranged between the two elastic retaining rings 7. A buffer gap 601 is provided between the dividing ring 6 and the rotating shaft 402. A flow limiting mechanism is provided at the buffer gap 601.

[0027] The current limiting component includes baffles 602 that are symmetrically fixedly connected to the rotating shaft 402, and a micro gap 603 is provided between the baffles 602 and the dividing ring 6.

[0028] The micro-gap 603 between the dividing ring 6 and the baffle 602 restricts the outflow of coolant, allowing it to flow out stably under a certain water pressure. The coolant flows through the micro-gap 603 into the buffer gap 601, and finally enters the space between the dividing ring 6 and the elastic baffle 7. The coolant entering the space between the dividing ring 6 and the elastic baffle 7 reduces the impact force to a certain extent, and then flows out from the outlet 702, thereby effectively preventing the lubricant from spraying out from the support bearing 504. In addition, the temperature of the coolant located between the elastic baffle 7 and the dividing ring 6 is higher than the temperature of the coolant in the cooling chamber 506, which has a temperature transition effect, further preventing thermal stress cracks from appearing in the rotating shaft 402.

[0029] In a specific implementation, the baffle 602 has a certain flow-blocking effect. When water flows, it can be guided to the surroundings, improving the turbulence effect of the coolant at its edge.

[0030] To facilitate the detection of the vibration amplitude of the rotating shaft 402, the following implementation method can be adopted: the outer diameter of the baffle 602 is larger than the inner diameter of the dividing ring 6, and a detection gap 604 is provided between the outer edge of the baffle 602 and the inner edge of the dividing ring 6, and a water pressure detection component is provided on one side of the cooling cavity 506.

[0031] Within the safe amplitude range, the gap between the baffle 602 and the dividing ring 6 remains basically unchanged. In addition, the vibration amplitude is less than the detection gap 604. When the vibration amplitude is greater than the detection gap 604, the outer edge of the baffle 602 will move to the buffer gap 601, forming a larger flow channel. At this time, the water pressure in the cooling chamber 506 will decrease. By detecting the water pressure, it can be determined in time whether the amplitude of the rotating shaft 402 is within the safe range, thereby effectively avoiding the excessive amplitude of the rotating shaft 402 from affecting the processing quality of the current batch of crucible preforms 104.

[0032] The water pressure testing assembly includes a testing box 501 fixedly mounted on the outer sheath 5, and a pressure gauge 502 is fixedly connected to the outer wall of the testing box 501.

[0033] The pressure gauge 502 can also be electronic, which can transmit pressure signals to the control terminal in a timely manner and promptly remind the staff.

[0034] An elastic membrane 503 is fixedly connected between the detection box 501 and the cooling cavity 506.

[0035] By setting up the elastic diaphragm 503, the accuracy of the pressure gauge 502 can be prevented from being affected by the flow or movement of water.

[0036] To improve the heat exchange and cooling effect of the coolant on the rotating shaft 402, the following implementation method can be adopted, with reference to... Figure 7The cooling chamber 506 is provided with a spray pipe 307 that is connected to the liquid supply pipe 306. Multiple spray nozzles 308 are symmetrically opened on the spray pipe 307, and the spray nozzles 308 are distributed in a ring along the axis of the rotating shaft 402.

[0037] In a specific implementation, a spray pipe 307 with symmetrically arranged spray nozzles 308 is used to supply coolant. On the one hand, coolant can be supplied evenly and precisely to the outer surface of the rotating shaft 402. On the other hand, the coolant in the cooling chamber 506 can be made turbulent, thereby improving its heat exchange effect.

[0038] The outer sheath 5 is symmetrically provided with support bearings 504, and the length of the first return cavity 505 is less than the length of the second return cavity 507.

[0039] The support bearing 504 is mainly used to support and guide both ends of the rotating shaft 402 to prevent it from shaking severely. The length of the first return cavity 505 is set to be less than the length of the second return cavity 507. This design can cool the load end more accurately, improve the cooling effect, and prevent the rotating shaft 402 from overheating.

[0040] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A novel preform CNC needle punch machine comprising: The main body of the device (1), comprising a first needle-piercing mechanism (101), a second needle-piercing mechanism (102), and a top locking mechanism (103), is characterized in that it further comprises: A rotating mechanism (2) for installing and driving the crucible preform (104) to rotate, the rotating mechanism (2) includes a detachably connected lower box (3) and upper box (4), the lower box (3) being provided with a plurality of mounting slots (302). The outer sheath (5) is fixedly connected to the upper housing (4), and a rotating shaft (402) is rotatably provided inside the outer sheath (5), and the rotating shaft (402) is coaxially arranged with the outer sheath (5); A spindle box (401) is disposed on one side of the outer sheath (5). The output end of the spindle box (401) is connected to the rotating shaft (402). The other end of the rotating shaft (402) is provided with a chuck mechanism (403). A sealing assembly is symmetrically arranged inside the outer sheath (5), and the sealing assembly is rotatably connected to the rotating shaft (402), and a drainage unit is provided on the sealing assembly; The cooling chamber (506) is disposed between the two sealing components; A circulation assembly for circulating coolant into the cooling chamber (506).

2. A novel preform CNC needling machine as claimed in claim 1, wherein, The sealing assembly includes elastic retaining rings (7) symmetrically fixed inside the outer sheath (5), wherein the inner ring of the elastic retaining ring (7) is fixedly connected to a fitting retaining ring (701), and the drainage unit includes a liquid outlet (702) disposed on the fitting retaining ring (701), and the liquid outlet end of the liquid outlet (702) is fixedly connected to a flow deflector (703).

3. A novel preform CNC needle punching machine as claimed in claim 2, wherein, The circulation assembly includes a storage chamber (303) disposed in the lower housing (3). A circulation pump (304) is disposed in the storage chamber (303). A liquid supply pipe (306) is disposed between one end of the pump and the cooling chamber (506), and a liquid extraction pipe (305) is disposed between the other end of the pump and the storage chamber (303). A first reflux chamber (505) is disposed between one of the elastic retaining rings (7) and the chuck mechanism (403), and a second reflux chamber (507) is disposed between the other elastic retaining ring (7) and the spindle box (401). A reflux pipe (404) is disposed between the first reflux chamber (505) and the second reflux chamber (507) and the storage chamber (303). A flared end (405) is disposed near the outer sheath (5) of the reflux pipe (404). A wind-cooled heat dissipation mechanism (301) is disposed on one side of the lower housing (3).

4. A novel preform CNC needle punching machine as claimed in claim 2, wherein, A dividing ring (6) is symmetrically arranged between the two elastic retaining rings (7), and a buffer gap (601) is provided between the dividing ring (6) and the rotating shaft (402). A flow limiting mechanism is provided at the buffer gap (601).

5. A novel preform CNC needle punching machine as claimed in claim 4, wherein, The current limiting component includes baffles (602) symmetrically fixedly connected to the rotating shaft (402), and a micro gap (603) is provided between the baffles (602) and the dividing ring (6).

6. A novel preform CNC needling machine as claimed in claim 5, wherein, The outer diameter of the baffle (602) is larger than the inner diameter of the dividing ring (6), and a detection gap (604) is provided between the outer edge of the baffle (602) and the inner edge of the dividing ring (6). A water pressure detection component is provided on one side of the cooling cavity (506).

7. A novel preform CNC needle punching machine as claimed in claim 6, wherein, The water pressure detection assembly includes a detection box (501) fixedly mounted on the outer sheath (5), and a pressure gauge (502) is fixedly connected to the outer wall of the detection box (501).

8. A novel preform CNC needling machine as claimed in claim 7, wherein, An elastic membrane (503) is fixedly connected between the detection box (501) and the cooling chamber (506).

9. A novel preform CNC needle punching machine as claimed in claim 3, wherein, The cooling chamber (506) is provided with a spray pipe (307) that is connected to the liquid supply pipe (306). Multiple spray nozzles (308) are symmetrically opened on the spray pipe (307), and the spray nozzles (308) are distributed in a ring along the axis of the rotating shaft (402).

10. A novel preform CNC needle punching machine as claimed in claim 3, wherein, The outer sheath (5) is symmetrically provided with support bearings (504), and the length of the first reflux cavity (505) is less than the length of the second reflux cavity (507).

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