Foam core material grooving device

Abstract

The utility model discloses a foam core material grooving device which comprises a machining unit and a control cabinet used for controlling the machining unit. The machining unit comprises a conveying assembly, a pressing roller assembly and a cutting assembly, wherein the pressing roller assembly and the cutting assembly are sequentially erected on the conveying assembly in the conveying direction of the conveying assembly and used for preventing the foam core materials from warping. Wherein the cutting assembly comprises a rotating shaft erected on the conveying assembly and a plurality of saw blades installed on the rotating shaft at intervals, and cutting edges of the saw blades are arc-shaped cutting edges. According to the utility model, the cutting work of the foam core material in the wind power blade can be finished with high quality, the arc-shaped slotting can be performed on the foam core material, the purposes of reducing the problem of internal stress concentration of the groove of the foam core material and the problem of more resin permeation can be achieved, and the device is suitable for the production of the wind power blade and is used for the slotting process of the foam core material.

Description

Technical Field

[0001] This utility model belongs to the field of wind turbine blade processing equipment, and relates to a production equipment for wind turbine blade core material, specifically a grooving device capable of cutting arc-shaped grooves in the foam core material of wind turbine blades. Background Technology

[0002] In wind turbine blades, to reduce the weight of the blades themselves, increase structural stiffness, and prevent local instability, sandwich structures are usually used at the leading edge, trailing edge, and internal shear web of the blades. The sandwich structure is mainly composed of a panel and a core material, with the core material usually being a foam core material made of PVC or PET.

[0003] To improve the conformability of the foam core material to the blade surface mold and to suppress the delamination between the core material and the panel, the foam core material in the sandwich structure is often processed with shallow grooves for resin filling. The bonding strength between the panel and the foam core material mainly depends on the resin wetting of the foam core material and the final curing. However, the grooving process and method will affect the resin curing reaction, thus affecting the bonding strength of the panel. Therefore, how to groove the surface of the foam core material is a difficult problem that needs to be continuously explored.

[0004] Currently, grooving of foam core materials is usually done using saw blades with right-angled edges. However, this grooving method results in a right-angled bottom shape. During resin injection, the resin tends to concentrate at the right angle, leading to significant stress concentration. This can cause the foam core material to crack or even break.

[0005] In addition, when resin is injected into the foam core material, some of the resin will fill the pores on the surface of the foam core material. Using a right-angled groove bottom will result in a larger contact area between the foam core material and the resin, causing the foam core material to absorb more resin. This will not only increase the weight of the finished product, but also increase the cost of resin injection. Utility Model Content

[0006] To address the aforementioned shortcomings in the existing technology, this utility model aims to provide a foam core material grooving device that can perform arc-shaped grooving on the foam core material, thereby reducing the problems of stress concentration and excessive resin penetration within the groove of the foam core material.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A foam core material grooving device includes a processing unit and a control cabinet for controlling the processing unit;

[0009] The processing unit includes a conveying assembly, a pressure roller assembly and a cutting assembly that are sequentially mounted on the conveying assembly along the conveying direction to prevent the foam core material from warping.

[0010] The cutting assembly includes a rotating shaft mounted on a conveying assembly and multiple saw blades spaced apart on the rotating shaft, wherein the saw blades have curved cutting edges.

[0011] As a limitation of this utility model, the cutting assembly also includes a first movable bearing seat fixed on the conveying assembly for adjusting the distance between the rotating shaft and the conveying assembly.

[0012] As a further limitation of this utility model, the cutting assembly also includes an air pump connected to the rotating shaft and an air compressor connected to the air pump. The rotating shaft has a hollow structure, and a boss for driving the saw blade to rotate is fixed on the rotating shaft. Multiple air jet holes are opened on the rotating shaft near both sides of the saw blade.

[0013] As a further definition of this utility model, the two sides of the saw blade have a frosted structure. The saw blade is mounted on the rotating shaft by a clamping mechanism. The clamping mechanism includes a first clamping block and a second clamping block that pass through the rotating shaft and are located on both sides of the saw blade, respectively. The first clamping block is threadedly connected to the second clamping block.

[0014] As another limitation of this utility model, the pressure roller assembly includes a pressure roller mounted on the conveying assembly and a second movable bearing seat installed at the end of the pressure roller for adjusting the distance between the pressure roller and the conveying assembly.

[0015] As a further limitation of this utility model, the processing unit also includes a dust collection component mounted on the conveying assembly for absorbing cutting residue. The dust collection component includes a box mounted above the pressure roller assembly and the cutting assembly, a dust collection port fixed on the top surface of the box near the conveying assembly, a dust collection pipe passing through the top surface of the box and connected to the dust collection port, and an industrial vacuum cleaner connected to the dust collection pipe. The height of the box in the conveying direction of the conveying assembly is lower than that in other directions, and a channel for the foam core material to pass through is formed at the bottom of the box.

[0016] As a third limitation of this utility model, a ruler for limiting the movement direction of the foam core material is fixed on the conveying assembly.

[0017] As a further limitation of this utility model, a visual touch screen operation panel is installed on the control cabinet.

[0018] By adopting the above-mentioned technical solution, the beneficial effects achieved by this utility model compared with the prior art are as follows:

[0019] (1) This utility model designs a foam core material grooving device that can perform arc-shaped grooving on the foam core material, thereby reducing the stress in the grooving and excessive resin penetration of the foam core material. By setting the shape of the saw blade to arc, the shape of the cut groove is arc, avoiding the presence of right angles in the bottom of the groove, thus preventing stress concentration. At the same time, by changing the shape of the groove from right angle to arc, the contact area between the foam core material and the resin is reduced, which also prevents excessive resin penetration into the foam core material, thus increasing the weight and cost of the finished product.

[0020] (2) The cutting assembly of this utility model is provided with a first movable bearing seat and the pressure roller assembly is provided with a second movable bearing seat. The position of the rotating shaft in the cutting assembly can be adjusted by the first movable bearing seat and the position of the pressure roller can be adjusted by the second movable bearing seat, so that this utility model can adapt to the cutting of foam core materials of different thicknesses.

[0021] (3) In this utility model, the rotating shaft is connected to an air pump and an air compressor, and an air jet hole is provided on the rotating shaft. When cutting, gas is sprayed out through the air jet hole, which can cool the saw blade and prevent the saw blade from deforming, becoming unstable or even breaking due to overheating.

[0022] (4) The saw blade has a sanding structure on both sides, which can sand the cut groove surface, ensure that the groove opening is flat, prevent the cut surface from having "burrs" and "strips", and facilitate resin flow.

[0023] (5) In this utility model, the saw blade is installed on the rotating shaft through a clamping mechanism. The clamping structure can change the spacing between the saw blades and disassemble the saw blades to change the number of saw blades, so that this utility model can meet the production of foam core materials for different types of wind turbine blades.

[0024] (6) The present invention is equipped with a dust collection component, which can collect the dust generated during the cutting process, ensuring that the product surface is clean and tidy, and providing a good working environment for workers.

[0025] (7) The conveying component in this utility model is equipped with a guide ruler, which can limit the movement direction of the foam core material on the conveying component and prevent abnormal situations such as skewing of the foam core material during cutting.

[0026] (8) This utility model is equipped with a control cabinet, and a visual touch screen operation panel is installed on the control cabinet to facilitate the control of cutting parameters.

[0027] In summary, this utility model can complete the cutting of foam core material in wind turbine blades with high quality, and can perform arc-shaped grooving on the foam core material, thereby reducing the problems of stress concentration and excessive resin penetration in the groove of the foam core material. It is suitable for the production of wind turbine blades and is used for the grooving process of foam core material. Attached Figure Description

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model (industrial vacuum cleaner, air pump and air compressor are not shown).

[0030] Figure 2 This is a schematic diagram of the internal structure of the processing unit in an embodiment of this utility model;

[0031] Figure 3 This is a schematic diagram showing the positional relationship between the rotating shaft and the saw blade in an embodiment of this utility model;

[0032] Figure 4 This is a schematic diagram of the saw blade structure in an embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the structure of the rotating shaft in an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the slotted foam chip structure in an embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram showing the positional relationship between the saw blade and the clamping mechanism in an embodiment of this utility model;

[0036] In the diagram: 1. Control cabinet; 2. Processing unit;

[0037] 21. Second movable bearing seat; 22. Pressure roller; 23. First movable bearing seat; 24. Rotating shaft; 25. Saw blade; 26. Dust suction port; 27. Dust suction pipe; 28. Straightedge; 29. ​​First clamping block; 210. Second clamping block;

[0038] 241. Air vent; 242. Boss;

[0039] 251. Blade;

[0040] A. Arc-shaped groove. Detailed Implementation

[0041] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0042] This embodiment discloses a grooving device for foam core materials, such as Figure 1 As shown, it includes a processing unit 2, a control cabinet 1 fixed on the processing unit 2, and a visual touch screen operation panel installed on the control cabinet 1; wherein the processing unit 2 includes a conveying component, a pressure roller component mounted on the conveying component, a cutting component mounted on the conveying component, and a dust collection component mounted on the conveying component.

[0043] Control cabinet 1 is an existing control device. Through control cabinet 1, the opening and closing of the pressure roller assembly, the cutting assembly and the dust collection assembly can be controlled, as well as the height of the pressure roller assembly and the cutting assembly can be adjusted, and the rotation speed of the saw blade in the cutting assembly can also be controlled.

[0044] The conveying assembly is an existing parallel belt conveyor, such as Figure 2 As shown, a guide ruler 28 is fixed on each of the two brackets parallel to the conveying direction of the conveyor belt in the conveying assembly. Each guide ruler 28 is fixed to the conveying assembly by bolts and nuts located on both sides of the conveying assembly bracket. By loosening the nuts, the distance between the two guide rulers 28 can be adjusted to be equal to the width of the foam core material to be processed. When the foam core material is running on the conveying assembly, the two guide rulers 28 will keep the direction of movement of the foam core material unchanged.

[0045] like Figure 2 As shown, the pressure roller assembly includes a second movable bearing seat 21 fixed on the conveying assembly, a rotary joint mounted on the movable part of the second movable bearing seat 21, and a pressure roller 22 mounted on the rotary joint. Two second movable bearing seats 21 are provided, respectively mounted on two supports parallel to the conveying direction of the conveyor belt in the conveying assembly, and the two second movable bearing seats 21 are arranged opposite each other, such that the axis of the pressure roller 22 mounted on it is perpendicular to the movement direction of the conveyor belt in the conveying assembly.

[0046] like Figure 2 and Figure 3 As shown, the cutting assembly includes a first movable bearing seat 23 fixed on the conveying assembly, a rotary joint mounted on a movable part of the first movable bearing seat 23, a rotary shaft 24 mounted on the rotary joint, a saw blade 25 mounted on the rotary shaft 24 via a clamping mechanism, an air pump connected to the rotary shaft 24, and an air compressor connected to the air pump. Two first movable bearing seats 23 are provided, each located on the side of two second movable bearing seats 21 near the discharge end of the conveying assembly. Figure 5 As shown, the rotating shaft 24 has a hollow structure, and multiple air jet holes 241 are provided on the rotating shaft 24 near both sides of the saw blade 25, and the multiple air jet holes 241 are arranged around the rotating shaft 24. Multiple saw blades 25 can be provided depending on the actual production situation; in this embodiment, thirty-nine saw blades 25 are provided, such as... Figure 4 As shown, the saw blade 25 has an arc-shaped cutting edge 251, and both sides of the saw blade 25 are designed with a frosted structure, enabling this embodiment to cut patterns such as... on the foam core material. Figure 6 The arc-shaped groove A is shown. The clamping mechanism includes a first clamping block 29 and a second clamping block 210, which are located on both sides of the saw blade 25. The first clamping block 29 can be installed and removed from the rotating shaft 24 by bolts. The first clamping block 29 and the second clamping block 210 are fixedly connected by bolts. When the bolts are tightened, the first clamping block 29 and the second clamping block 210 are pressed together to fix the saw blade 25. When the bolts are loosened, the first clamping block 29 and the second clamping block 210 are released, thereby disassembling the saw blade 25. In actual use, the air pump and air compressor will fill the rotating shaft 24 with air. The filled air will be ejected through the jet holes 241 on the rotating shaft 24. Since the jet holes 241 are located on both sides of the saw blade 25, the ejected air will carry away the heat from the surface of the saw blade 25. Before cutting, the saw blade 25 can be disassembled and assembled by the clamping mechanism to adjust the spacing between the saw blades 25 and change the number of saw blades 25 installed, so as to change the number and spacing of the arc-shaped grooves A cut. At the same time, the height of the saw blade 25 can be adjusted by the first movable bearing seat 23 so that the spacing, number and height of the saw blade 25 meet the production requirements.

[0047] It should be added here that: under the control of the control cabinet 1, the moving parts in the two first movable bearing seats 21 move in the same direction and distance, and the moving parts in the two second movable bearing seats 23 move in the same direction and position, so that the rotating shaft 24 and the pressure roller 22 are always in a parallel position to each other with the upper surface of the foam core material.

[0048] The dust collection assembly includes a housing mounted on the conveying assembly, a dust collection port 26 fixed on the top surface of the housing near the conveying assembly, a dust collection pipe 27 passing through the top surface of the housing and connected to the dust collection port 26, and an industrial vacuum cleaner connected to the dust collection pipe 27. The housing is composed of five metal plates, which enclose the pressure roller assembly and the cutting assembly. The height of the two metal plates facing the feed and discharge ends of the conveying assembly is less than the height of the other two metal plates (excluding the top metal plate), and the height difference between them is greater than the height of the foam core material to be cut, allowing the foam core material to pass smoothly through the housing.

[0049] When using this embodiment, first adjust the number and spacing of the saw blades 25 to the required state, then adjust the height of the saw blades 25 and the pressure rollers 22 to the required state, and at the same time set the rotation speed of the saw blades 25 and the conveying speed of the conveying component to the required values. After the adjustment is completed, this embodiment can be started. Then, place the foam core material on the feed end of the conveying component. The foam core material moves towards the discharge end with the conveyor belt in the conveying component and is cut by the cutting component. If it is necessary to perform cross grooving on the foam core material, simply rotate the foam core material that has been processed once by 90° and put it into the feed end for secondary cutting.

[0050] It should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A foam core slotting device characterized by: The processing unit comprises a conveying assembly, a pressing roller assembly for preventing the foam core material from warping and a cutting assembly arranged in sequence along the conveying direction of the conveying assembly; The cutting assembly comprises a rotating shaft arranged on the conveying assembly and a plurality of saw blades spacedly arranged on the rotating shaft, and the cutting edges of the saw blades are arc-shaped cutting edges. The cutting assembly further comprises an air pump connected with the rotating shaft and an air compressor connected with the air pump, the rotating shaft is a hollow structure, a boss for driving the saw blades to rotate is fixed on the rotating shaft, and a plurality of air injection holes are formed on the rotating shaft near the positions of the two sides of the saw blades. The cutting assembly further comprises a first movable bearing seat fixed on the conveying assembly for adjusting the distance between the rotating shaft and the conveying assembly.

2. A foam core slotting device according to claim 1, wherein: The two side surfaces of the saw blade are frosted structures, the saw blade is installed on the rotating shaft through a pressing mechanism, the pressing mechanism comprises a first pressing block and a second pressing block penetratingly arranged on the rotating shaft and respectively located at the two sides of the saw blade, and the first pressing block is threadedly connected with the second pressing block.

3. A foam core slotting device according to claim 2, wherein: The pressing roller assembly comprises a pressing roller arranged on the conveying assembly and a second movable bearing seat arranged on the end of the pressing roller for adjusting the distance between the pressing roller and the conveying assembly.

4. A foam core slotting device according to any one of claims 1 to 3, wherein: The processing unit further comprises a dust suction assembly arranged on the conveying assembly for absorbing cutting residues, the dust suction assembly comprises a box arranged above the pressing roller assembly and the cutting assembly, a dust suction port fixed on the top surface of the box near the conveying assembly, a dust suction pipeline penetratingly arranged on the top surface of the box and connected with the dust suction port, and an industrial dust collector connected with the dust suction pipeline, wherein the plate surface height of the box in the conveying direction of the conveying assembly is lower than the plate surface heights in other directions, and a passage for passing the foam core material is formed at the bottom of the box.

5. A foam core slotting device according to claim 4, wherein: A ruler is fixed on the conveying assembly for limiting the movement direction of the foam core material.

6. A foam core slotting device according to any one of claims 1-3, 5, wherein: A visual touch screen operation panel is arranged on the control cabinet.

7. A foam core slotting device according to claim 6, wherein: ​

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