NOL ring preparation tool
By designing a NOL ring preparation tool set including insert-connected tool splitter and extrusion ring, the problem of difficult mold release of existing tool sets is solved, and convenient mold release of the NOL ring is achieved, reducing the risk of damage.
Patent Information
- Application Number
- CN202420612261.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-03-27
AI Technical Summary
The existing NOL ring preparation tool has the problem of demolding difficulties. The fibers need to be carried out under high tension conditions during the winding process, and when cured at high temperature, it expands and contracts when it drops to room temperature, making it extremely difficult to remove the NOL ring. It usually requires a hammer to be beaten or cut by the cutting machine to remove.
A NOL ring preparation tool is designed, including two tool splits connected to the insert, each tool split has a drive shaft, a winding part and an extrusion ring. The insertion of a plurality of inserts in the slot is connected to form a cylinder for wrapping material, and the insert is radially squeezed by an extrusion ring to gather toward the axis of the cylinder, thereby facilitating separation and mold release.
The tooling reduces the diameter of the wound part by radially extruding the insert, which facilitates the release of the NOL ring, significantly improves the mold release convenience of the NOL ring, and avoids damage caused by hammer knocking or cutting by cutting machine.
Smart Images
Figure CN222590678U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of NOL ring preparation, in particular to a NOL ring preparation tool. Background Art
[0002] The development of hydrogen storage cylinders has a history of more than 50 years, and is divided into four types: all-metal cylinders (Type I), metal liner fiber hoop-wrapped cylinders (Type II), metal liner fiber fully wrapped cylinders (Type III), non-metal liner fiber fully wrapped cylinders (Type IV). Among them, Type I and Type II cylinders are relatively heavy and difficult to meet the unit mass hydrogen storage density requirements. Compared with Type III cylinders, Type IV cylinders generally use a non-metallic liner such as plastic and carbon fiber winding manufacturing method, which makes the cylinders lighter, lower cost, and higher mass hydrogen storage density.
[0003] The current industry is still dominated by Type III cylinders and is in the stage of developing Type IV cylinders. The extensive application of composite materials is the direction for weight reduction and development of gas cylinders. Among them, the sampling and testing of composite materials will be the basis of product analysis and design. Refining the sampling method and improving the testing level will be the basis for the development of the industry.
[0004] NOL (Naval Ordnance Laboratory) ring refers to a cylinder obtained by winding prepreg fibers onto a tooling, and then curing and polishing (dimensional finishing) the wound prepreg fibers. Its application in gas cylinders is mainly reflected in two aspects. The first aspect is to prepare NOL rings of corresponding thickness and test their tensile strength and shear strength. The second aspect is to study the curing process of gas cylinders, and improve the curing process of gas cylinders by adjusting the winding tension and gradient curing temperature step setting.
[0005] However, the existing NOL ring preparation tooling has the problem of difficult demoulding. Even if the winding steel mold has been coated with a demoulding agent before winding, the fibers need to be wound under a large tension during the winding process, and the high-temperature curing will cause thermal expansion and contraction when the temperature drops to room temperature. This makes the NOL ring extremely difficult to remove, and it can only be removed by hammering or cutting with a cutting machine. Utility Model Content
[0006] In view of this, the utility model aims to provide a NOL ring preparation tool to facilitate the demoulding of the NOL ring.
[0007] In order to achieve the above object, the technical solution of the utility model is implemented as follows:
[0008] A NOL ring preparation tool, comprising two tool parts connected by insertion;
[0009] Each of the tooling parts comprises a transmission shaft and a winding portion connected to one end of the transmission shaft, wherein the winding portion has a plurality of inserts extending along the axial direction of the transmission shaft and arranged at intervals in the circumferential direction of the transmission shaft, and a slot is formed between two adjacent inserts;
[0010] The two tooling parts are connected by inserting a plurality of the inserting pieces into the corresponding slots to form a cylinder for winding the winding material, and each of the inserting pieces can be radially squeezed to gather toward the axis of the cylinder.
[0011] Furthermore, each of the tooling parts further comprises an extrusion ring sleeved on the winding part;
[0012] When the extrusion ring is driven to move toward the free end of the winding portion, it can radially extrudes the corresponding insert.
[0013] Furthermore, at least one of the outer peripheral walls of the root of the insert is provided with a first inclined surface arranged obliquely;
[0014] The inner peripheral wall of the extrusion ring is provided with a second inclined surface adapted to the first inclined surface;
[0015] When the extrusion ring moves, the second inclined surface abuts against the first inclined surface to radially extrudes the insert.
[0016] Further, the second inclined surface is a conical surface continuously arranged along the circumference of the extrusion ring; and / or,
[0017] The outer peripheral wall of the root of each insert is provided with the first inclined surface.
[0018] Furthermore, at least one of the winding parts is provided with a limiting portion, and the limiting portion is used to block the winding material inside the limiting portion;
[0019] The limiting portion includes a limiting piece provided on at least one of the inserting pieces, and the limiting piece is provided to extend outwardly along the radial direction of the winding portion.
[0020] Furthermore, at least one of the limiting pieces is provided with a scale mark on a side facing away from the transmission shaft, and the scale mark is arranged along an extension direction of the limiting piece.
[0021] Furthermore, the limiting piece is fan-shaped, and the axis of the limiting piece is coaxially arranged with the axis of the winding part.
[0022] Furthermore, the first inclined surface is arranged between the root of the inserting piece and the limiting piece.
[0023] Furthermore, each of the tooling parts also includes a connecting block provided at the free end of each of the transmission shafts, and the connecting block is used to be connected to an external driving device.
[0024] Furthermore, the connecting block is provided with a connecting head, the transmission shaft is provided with a connecting groove, and the connecting head is inserted into the connecting groove.
[0025] Compared with the prior art, the utility model has the following advantages:
[0026] The NOL ring preparation tooling of the utility model is connected by inserting a plurality of inserts into corresponding slots, so that the winding parts on the two tooling parts form a cylinder, which is beneficial to the winding of the winding material, thereby facilitating the preparation of the NOL ring. When the two tooling parts move along their own axes and separate in the NOL ring, the inserts are radially squeezed and gathered toward the axis of the cylinder, which is beneficial to the two separated winding parts coming out of the NOL ring, thereby facilitating the demoulding of the NOL ring.
[0027] In addition, the insert can be squeezed by moving the extrusion ring, which is conducive to the convergence of multiple inserts to the axis of the cylinder, thereby further improving the convenience of the winding part in the NOL ring. The first inclined surface on the insert and the second inclined surface on the extrusion ring cooperate to improve the radial extrusion effect of the extrusion ring on each insert. The second inclined surface is a conical surface continuously arranged along the circumference of the extrusion ring, and the first inclined surface is arranged on at least one of the inserts, which is conducive to ensuring the abutment effect between the first inclined surface and the second inclined surface. As long as the extrusion ring is moved, each insert can be squeezed through the cooperation of the first inclined surface and the second inclined surface, and the second inclined surface is easy to be formed on the extrusion ring.
[0028] In addition, the setting of the limiting plate in the limiting part is conducive to blocking the movement of the winding material to the outside of the limiting plate, and is conducive to preventing the winding material from slipping at the end, thereby improving the thickness uniformity of the NOL ring. The setting of scale marks on the limiting plate is conducive to obtaining the thickness of the NOL ring, and the measurement accuracy is high. The limiting plate is fan-shaped, which is conducive to increasing the contact area with the winding material, thereby helping to improve the limiting effect on the winding material. The connecting block on the transmission shaft is conducive to receiving the power of the external driving device, and driving the transmission shaft to rotate, which is conducive to the winding of the winding material to form the NOL ring. The setting of the connector and the connecting groove is conducive to the connection between the connecting block and the transmission shaft, and the structures of the two are simple and easy to process. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:
[0030] Figure 1 This is a schematic diagram of the structure of the NOL ring preparation tooling according to an embodiment of the utility model;
[0031] Figure 2It is a structural schematic diagram of the tooling split body according to an embodiment of the utility model;
[0032] Figure 3 It is a front view of the NOL ring preparation tooling according to an embodiment of the utility model;
[0033] Figure 4 for Figure 3 AA direction section view in.
[0034] Description of reference numerals:
[0035] 1. Transmission shaft; 2. Winding part; 3. Extrusion ring;
[0036] 101, connecting block; 1011, connecting head;
[0037] 200, first inclined surface; 201, inserting piece; 202, slot; 203, limiting piece; 204, scale mark; 300, second inclined surface. DETAILED DESCRIPTION
[0038] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0039] In the description of the present invention, it should be noted that if there are terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first", "second", etc., they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0040] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.
[0041] This embodiment relates to a NOL ring preparation tool, which facilitates the preparation and demoulding of the NOL ring by optimizing its own structure.
[0042] In terms of overall structure, the NOL ring preparation tooling includes two tooling parts connected by insertion. Each tooling part includes a transmission shaft 1 and a winding part 2 connected to one end of the transmission shaft 1. The winding part 2 has a plurality of inserts 201 extending along the axial direction of the transmission shaft 1 and arranged at intervals in the circumferential direction of the transmission shaft 1, and a slot 202 is formed between two adjacent inserts 201. The two tooling parts are connected by inserting a plurality of inserts 201 into corresponding slots 202, and form a cylinder for winding the winding material, and each insert 201 can be radially extruded and gathered toward the axis of the cylinder.
[0043] The NOL ring preparation tooling of this embodiment is connected by inserting a plurality of inserts 201 into corresponding slots 202, so that the winding parts 2 on the two tooling parts form a cylinder, which is convenient for winding the winding material, thereby facilitating the preparation of the NOL ring, and by radially extruding each insert 201, each insert 201 is gathered toward the axis of the cylinder. When the two tooling parts move along their own axis and separate in the NOL ring, each insert 201 is radially extruded and gathered toward the axis of the cylinder, thereby reducing the diameter of the winding part 2, thereby facilitating the two separated winding parts 2 to be released from the NOL ring, thereby facilitating the demoulding of the NOL ring.
[0044] Based on the above overall introduction, an exemplary structure of the NOL ring preparation tooling described in this embodiment is as follows: Figure 1 As shown in , the two tooling parts are connected by relative insertion, and the two tooling parts have the same structure, which is conducive to reducing production costs and facilitating the assembly and molding of the tooling.
[0045] The exemplary structure of the tooling split body in this embodiment is as follows Figure 2 As shown in , one end of each transmission shaft 1 is connected to four inserts 201, and there are also four slots 202. The cross section of each insert 201 is arc-shaped, and the axis of each insert 201 is coaxially arranged with the axis of the transmission shaft 1. Such an arrangement is conducive to the coaxial arrangement of the cylinder and the transmission shaft 1, thereby facilitating the winding effect of the winding material on the cylinder, and further facilitating the preparation of the NOL ring.
[0046] When the two tooling parts are installed, they are arranged opposite to each other, and by moving closer to each other, multiple inserts 201 are respectively inserted into corresponding slots 202, and the above-mentioned cylinder is formed by splicing multiple inserts 201. It can be understood that in specific implementation, the number of inserts 201 can also be adaptively increased or decreased according to the use requirements, and the number of slots 202 is the same as the number of inserts 201, so as to ensure that the multiple inserts 201 on the two winding parts 2 are plugged and connected with the corresponding slots 202.
[0047] As a preferred embodiment, Figure 1 , Figure 3 and Figure 4 As shown in , each tooling part also includes a squeezing ring 3 sleeved on the winding part 2. When the squeezing ring 3 is driven to move toward the free end of the winding part 2, it can radially squeeze the corresponding insert 201. Here, the insert 201 can be squeezed by moving the squeezing ring 3, which is conducive to the gathering of multiple inserts 201 toward the axis of the cylinder, thereby further improving the convenience of the two winding parts to escape from the NOL ring.
[0048] Furthermore, in this embodiment, the outer peripheral wall at the root of at least one of the inserts 201 is provided with an inclined first bevel 200, and the inner peripheral wall of the extrusion ring 3 is provided with a second bevel 300 adapted to the first bevel 200. When the extrusion ring 3 moves, the insert 201 is radially extruded by the abutment of the second bevel 300 and the first bevel 200. Here, as a preference, the outer peripheral wall at the root of each insert 201 is provided with an inclined first bevel 200, and the first bevel 200 on each insert 201 and the second bevel 300 on the extrusion ring 3 cooperate, which is conducive to improving the radial extrusion effect of the extrusion ring 3 on each insert 201.
[0049] The specific structure is Figure 3 and Figure 4 As shown in the figure, the distance between the first inclined surface 200 and the axis of the cylinder is gradually increased in the direction away from the transmission shaft 1. The distance between the second inclined surface 300 and the axis of the extrusion ring 3 is also gradually increased in the direction away from the transmission shaft 1. When the extrusion ring 3 moves toward the free end of the winding part 2, the second inclined surface 300 presses against the first inclined surface 200, and the first inclined surface 200 can radially squeeze each insert 201, so that each insert 201 can be easily removed from the NOL ring under the action of the outward pulling force.
[0050] As a preferred embodiment, the second inclined surface 300 in this embodiment is a conical surface continuously arranged along the circumference of the extrusion ring 3. With such an arrangement, as long as the extrusion ring 3 moves toward the free end of the winding portion 2, each insert 201 can be squeezed by the abutment between the second inclined surface 300 and the first inclined surface 200, thereby facilitating the operation convenience of the extrusion ring 3. Moreover, the conical surface structure is easy to be processed and formed on the extrusion ring 3, and the use effect is good.
[0051] It should be noted that the extrusion ring 3 in this embodiment has an initial position where it is sleeved at the connection between the winding part 2 and the transmission shaft 1, and moves toward the free end of the winding part 2, so that each insert 201 is gathered toward the axis of the cylinder in a demoulding state. The extrusion ring 3 at the initial position is fixed relative to the transmission shaft 1 and the winding part 2, and is conducive to further improving the plug-in effect between the winding part 2 and the stability of the cylinder during rotation.
[0052] In this embodiment, the parameters such as the slope and length of the first inclined surface 200 should ensure that after the extrusion ring 3 is moved into place, the insert 201 can be easily removed from the corresponding slot 202 under the action of the outward pulling force. In addition, as a preference, in this embodiment, a gap is set between the side wall of the slot 202 and the two sides of the insert 201, so as to meet the needs of cylinder molding while also facilitating the separation of the two tooling parts.
[0053] As a preferred embodiment, at least one of the winding parts 2 is provided with a limiting portion located on the inner side of the extrusion ring 3, and the limiting portion is used to block the winding material on the inner side of the limiting portion. The limiting portion includes a limiting piece 203 provided on at least one of the inserts 201, and the limiting piece 203 is provided to extend radially outwardly along the winding part 2. Here, in order to improve the limiting effect, each winding part 2 is provided with a limiting portion, and the winding material is wound between the two limiting portions. The provision of the limiting pieces 203 in the two limiting portions is conducive to defining the winding area of the winding material and preventing the winding material from slipping at both ends, thereby improving the thickness uniformity of the NOL ring.
[0054] In terms of specific structure, Figure 1 and Figure 2 As shown in , the extrusion ring 3 is arranged between the limiting piece 203 and the transmission shaft 1, and each insert 201 is provided with the above-mentioned limiting piece 203, which is conducive to increasing the limiting area of the limiting part, thereby improving the limiting effect of the limiting part. The limiting piece 203 in this embodiment is fan-shaped, and the axis of the limiting piece 203 is coaxially arranged with the axis of the winding part 2. By setting the limiting piece 203 in a fan shape, it is conducive to further increasing the contact area between the limiting piece 203 and the winding material, thereby facilitating the improvement of the limiting effect on the winding material.
[0055] As a preferred embodiment, Figure 1 and Figure 2 As shown in , each stopper 203 is provided with a scale mark 204 on the side facing away from the transmission shaft 1, and the scale mark 204 is provided along the extension direction of the stopper 203. Here, by providing the scale mark 204 on the stopper 203, it is easier to obtain the thickness of the NOL ring, and the measurement accuracy is high, compared with the traditional measurement tools such as calipers. Of course, it is also feasible to provide the scale mark 204 on only one of the stoppers 203.
[0056] like Figure 4 As shown in the figure, the first inclined surface 200 in this embodiment is arranged between the root of the insert 201 and the limiting piece 203. It is not only conducive to extending the stroke of the extrusion ring 3 and facilitating the insertion piece 201 to escape from the slot 202, but also the limiting piece 203 can limit the moving extrusion ring 3, which is conducive to preventing the extrusion ring 3 from damaging the prepared NOL ring, and has a better protective effect.
[0057] In addition, in order to facilitate the rotation of the cylinder and the winding material to be wound around the cylinder, each tooling component in this embodiment also includes a connecting block 101 provided at the free end of each transmission shaft 1, and the connecting block 101 is used to connect to an external driving device.
[0058] like Figure 1 and Figure 4As shown in , a connector 1011 is provided on the connection block 101, and a connection groove is provided on the transmission shaft 1, and the connector 1011 is inserted into the connection groove. That is, the connection block 101 is connected to the transmission shaft 1 by inserting the connector 1011 into the connection groove. The external driving device is the driving device in the winding machine, and the connector 1011 is connected to the winding machine, so that the cylinder is driven to rotate through the transmission shaft 1 under the drive of the driving device, so that the winding material is wound on the cylinder, which is beneficial to the preparation of the NOL ring.
[0059] It should be noted that the extrusion ring 3 in this embodiment is first installed to the initial position, and then the connection block 101 is installed to achieve relative fixation between the connection block 101 and the transmission shaft 1. In specific implementation, the cross section of the connection head 1011 can be non-circular, and the cross section of the connection groove is set in accordance with the shape of the connection head 1011 to limit the relative rotation between the connection block 101 and the transmission shaft 1. In addition, the connection between the connection block 101 and the transmission shaft 1 can also be strengthened by welding.
[0060] In addition, the winding material in this embodiment can be the material used to prepare the NOL ring in the prior art, for example, it can be a carbon fiber composite material, etc., which can be determined according to the preparation requirements of the NOL ring.
[0061] When preparing the NOL ring in the NOL ring preparation tool in this embodiment, the connecting block 101 is first loaded into the winding machine, and the cylinder is driven to rotate by the transmission shaft 1. After the carbon fiber composite material is dipped in resin, it is wound on the cylinder between the limit plates 203 at both ends according to the set tension. The limit plate 203 ensures that the carbon fiber composite material will not slip, and the thickness of the prepared NOL ring is uniform. The scale mark 204 on the height limit plate can be used to more intuitively observe the thickness of the NOL ring that has been wound. Then, after the NOL ring is wound, it is moved into the oven for curing, and the NOL ring is formed after curing.
[0062] Then, the prepared tooling is removed from the winding machine, and external forces are applied to the transmission shaft 1 to pull the corresponding tooling parts outward respectively, so that the length of the insertion parts of the two winding parts 2 gradually shortens until the two winding parts 2 are completely separated in the NOL ring. Next, each extrusion ring 3 is driven to move toward the free end of the winding part 2, and each insert 201 is squeezed toward the axis of the cylinder and gathered. At this time, the diameter of the winding part 2 is smaller than the diameter of the NOL ring, so the tooling parts are continuously pulled outward, so that the two tooling parts can be completely separated from the NOL ring, and the NOL ring can be demoulded.
[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A NOL ring preparation tool, characterized by: It includes two tooling parts connected by plug-in; Each of the tooling parts comprises a transmission shaft (1), and a winding portion (2) connected to one end of the transmission shaft (1), the winding portion (2) having a plurality of inserts (201) extending along the axial direction of the transmission shaft (1) and arranged at intervals in the circumferential direction of the transmission shaft (1), and a slot (202) being formed between two adjacent inserts (201); The two tooling parts are connected by inserting a plurality of the inserting pieces (201) into the corresponding slots (202) to form a cylinder for winding the winding material, and each of the inserting pieces (201) can be radially squeezed to gather toward the axis of the cylinder.
2. The NOL ring preparation tool according to claim 1, characterized in that: Each of the tooling parts further comprises an extrusion ring (3) sleeved on the winding part (2); When the extrusion ring (3) is driven to move toward the free end of the winding portion (2), it can radially extrude the corresponding insert (201).
3. The NOL ring preparation tool according to claim 2, characterized in that: The outer peripheral wall at the root of at least one of the inserts (201) is provided with a first inclined surface (200) arranged obliquely; The inner peripheral wall of the extrusion ring (3) is provided with a second inclined surface (300) adapted to the first inclined surface (200); When the extrusion ring (3) moves, the insert sheet (201) is radially extruded through the abutment between the second inclined surface (300) and the first inclined surface (200).
4. The NOL ring preparation tool according to claim 3, characterized in that: The second inclined surface (300) is a conical surface continuously arranged along the circumference of the extrusion ring (3); and / or the outer peripheral wall at the root of each of the inserts (201) is provided with the first inclined surface (200).
5. The NOL ring preparation tool according to claim 3, characterized in that: At least one of the winding parts (2) is provided with a limiting portion located inside the extrusion ring (3), and the limiting portion is used to block the winding material inside the limiting portion; The limiting portion comprises a limiting piece (203) provided on at least one of the inserting pieces (201), and the limiting piece (203) is provided to extend outwardly in the radial direction of the winding portion (2).
6. The NOL ring preparation tool according to claim 5, characterized in that: At least one of the limiting plates (203) is provided with a scale mark (204) on a side facing away from the transmission shaft (1), and the scale mark (204) is arranged along the extension direction of the limiting plate (203).
7. The NOL ring preparation tool according to claim 5, characterized in that: The limiting piece (203) is fan-shaped, and the axis of the limiting piece (203) is coaxially arranged with the axis of the winding part (2).
8. The NOL ring preparation tool according to claim 5, characterized in that: The first inclined surface (200) is arranged between the root of the inserting piece (201) and the limiting piece (203).
9. The NOL ring preparation tool according to any one of claims 1 to 8, characterized in that: Each of the tooling parts further comprises a connecting block (101) arranged at the free end of each of the transmission shafts (1), and the connecting block (101) is used to be connected to an external driving device.
10. The NOL ring preparation tool according to claim 9, characterized in that: The connection block (101) is provided with a connection head (1011), the transmission shaft (1) is provided with a connection groove, and the connection head (1011) is inserted into the connection groove.