CN211105740U

CN211105740U - Clamp for clamping filling in fabric filling process

Info

Publication number: CN211105740U
Application number: CN201920972621.4U
Authority: CN
Inventors: 杨丹军; 常宏伟; 阮宇翔
Original assignee: Siemens Gamesa Renewable Energy Shangai Co Ltd
Current assignee: Siemens Gamesa Renewable Energy Shangai Co Ltd
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2020-07-28
Anticipated expiration: 2029-06-26

Abstract

The utility model provides a anchor clamps (1) that are used for centre gripping filler at fabric filler in-process. The clamp (1) comprises: two gripper arms (5) extending in parallel in a longitudinal direction, each gripper arm (5) comprising a fixed end (51) and a free end (52) opposite to the fixed end (51); and a base (4) connected between the fixed ends (51) of the two gripper arms (5), wherein the gripper arms (5) comprise a reinforcing structure configured such that the two gripper arms (5) remain parallel to each other when the charge is gripped between the two gripper arms (5).

Description

Clamp for clamping filling in fabric filling process

Technical Field

The present invention generally relates to a clamp, and more particularly to a clamp for clamping a filler in a fabric filling process.

Background

A fabric filling step is typically used in the process of manufacturing, for example, turbine blades, where various laminates, such as dry glass fibers and/or pre-treated materials, are placed in a mold prior to being injected with a suitable liquid, such as epoxy resin, for curing. This step, commonly referred to as fabric packing (web packing), may include: placing a glass or carbon fibre mat or fabric in a mould to form an outer layer of fibrous material; providing a core material (e.g., balsa wood or PVC foam) on the outer layer; the outer fibrous layer and the core material are covered with an inner fibrous layer of fibrous mat or fabric. The final component (e.g., blade) is then cast by injecting epoxy into the mold. In the fabric filling step of this process, great care must be taken when arranging the various materials in the mould in such a way that undesired sheet overlaps, undulations, etc. are avoided as far as possible, which may have a negative effect on the shape, stability and overall quality of the final turbine blade. In addition, since the glass fibers have directionality in use, it is also necessary to ensure that the glass fibers are arranged in the correct direction in the fabric filling step to ensure the strength of the final member.

For this purpose, in the step of filling the fabric, an arrangement as shown in fig. 1 is required. In which a fabric 3, such as glass fiber, is arranged between fabric sandwich panels 2, and then the fabric sandwich panels 2 and the fabric 3 therein are held fixed by a jig 1, such as a metal fixing frame. As shown in fig. 2, the prior art clamp 1 is of a generally U-shaped configuration in side view, comprising a base 4 and two clamping arms 5 extending parallel from both ends of the base 4, the clamping arms 5 having a fixed end 51 fixed to the base 4 and a free end 52 opposite the fixed end 51. In use, the clamp 1 holds the fabric sandwich panel 2 and the fabric 3 therein between two holding arms 5, and the inner side surfaces of the holding arms 5 are brought into abutment with the surface of the fabric sandwich panel 2, as shown in fig. 1. This ensures that the fabric 3 is not easily displaced during application and subsequent processing.

However, due to the structural properties, the prior art clamp 1 is often subject to deformations, such as flaring, i.e. the free ends 52 of the gripping arms 5 are bent outwards, as shown in the clamp 1' in fig. 1 and in fig. 3. This results in edge warping of the glass fibers during the fabric filling process, which can cause axial changes in the glass fibers and thus axial defects in the glass fibers, and affect the mechanical properties of the final component.

To address this problem, workers typically use T-bar iron (T-bar) to repeatedly smooth or smooth the glass fibers. However, this is time and labor consuming. Moreover, when the edge warping is severe, the use of the t-bar cannot completely smooth the glass fiber.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a provide an above-mentioned problem has been solved to modified anchor clamps. According to the utility model discloses, a anchor clamps for being in fabric filler in-process centre gripping filler is provided, anchor clamps include: two clamping arms extending in parallel in a longitudinal direction, each clamping arm comprising a fixed end and a free end opposite to the fixed end; and a base connected between the fixed ends of the two clamp arms, wherein the clamp arms include a reinforcing structure configured to maintain the two clamp arms parallel to each other when the packing is clamped between the two clamp arms.

Through providing additional strengthening, changed anchor clamps and placed the support intensity on the fabric sandwich panel, made it can laminate the fabric sandwich panel more, and can not have the phenomenon that the opening expands outward among the prior art. Therefore, the fabric sandwich board can keep clamping the glass fiber without loosening, thereby reducing the defects of displacement and corrugation of the glass fiber. This in turn further reduces the occurrence of transverse or longitudinal defects of glass fibres on the fabric side of the final component, e.g. blade, in particular reducing the transverse wrinkle rate and saving blade repair time. In addition, due to the adoption of the clamp with the reinforcing structure, the laying time of the glass fiber is shortened in the fabric filling process, and the labor is saved.

As one aspect, the reinforcing structure is configured to widen the fixed end of the clamp arm in a lateral direction compared to the free end. Preferably, the width of the clamp arm in the transverse direction tapers from the fixed end to the free end. Preferably, the clamping arm is trapezoidal in shape in the transverse direction, wherein the fixed end and the free end form a long base and a short base of the trapezoid, respectively. Preferably, the clamp is a sheet metal part.

By changing the structure of the clamp, the rectangular clamping arm of the clamp in the prior art is changed into an inverted trapezoidal shape, so that the strength of the clamp is increased on the premise of not interfering the process flow of the fabric filling. Moreover, the clamp with the clamping arm with the inverted trapezoid shape can still be obtained through simple sheet metal machining, and the manufacturing cost is not obviously increased.

As another aspect, the reinforcing structure is configured such that the fixed end of the clamp arm is thickened on an outer side of the clamp arm compared to the free end. Preferably, the thickness of the clamping arm tapers from the fixed end to the free end.

As yet another aspect, the reinforcing structure is a reinforcing rib extending from the fixed end toward the free end on an outer side of the clamp arm.

Preferably, the base includes an extension, and the reinforcing rib is a diagonal member fixed between the extension and an outer side surface of the clamp arm. Preferably, both ends of the diagonal member are fixed to the outer side surfaces of the extension portion and the clamp arm, respectively, for example, by welding. Preferably, the end of the crossbar member fixed to the outer side surface of the clamp arm is located at a half position or two-thirds position between the fixed end and the free end. Alternatively, the one end of the diagonal member is located at the free end.

As a variant, the reinforcing rib is a longitudinal bar fixed on the outer lateral surface of the gripping arm in the longitudinal direction. Preferably, the longitudinal bar is fixed to the outer lateral surface of the gripping arm, for example by welding. Preferably, the longitudinal rod extends to a position halfway or two thirds between the fixed end and the free end. Alternatively, the longitudinal rod extends to the free end.

As another modification, the reinforcing rib is a longitudinal plate having one side fixed to an outer side surface of the clamp arm in the longitudinal direction. Preferably, the longitudinal plate is fixed to the outer side surface of the clamp arm, for example by welding. Preferably, the longitudinal plate extends to a position half or two thirds between the fixed end and the free end. Alternatively, the longitudinal plate extends to the free end. Preferably, the longitudinal plate member is rectangular in shape. Alternatively, the longitudinal plate tapers from the fixed end to the free end.

As a further modification, the base includes an extension, and the reinforcing rib is a longitudinal plate having one side fixed to an outer side surface of the clamp arm in the longitudinal direction and one end fixed to the extension. Preferably, the longitudinal plate is fixed to the outer side surfaces of the extension and the clamp arm, for example by welding.

Drawings

The invention is specifically illustrated by way of example in the accompanying drawings, in which:

FIG. 1 shows an arrangement in a prior art fabric filling step;

FIG. 2 shows schematic front and side views of a prior art clamp;

FIG. 3 shows a schematic view of a prior art clip after deformation;

figure 4 shows a schematic front view and side view of a clamp according to a first embodiment of the invention;

figure 5 shows a schematic front view and a side view of a clamp according to a second embodiment of the invention;

figure 6 shows a schematic front view and a side view of a clamp according to a third embodiment of the invention;

figure 7 shows a schematic front view and side view of a clamp according to a variant of the third embodiment of the invention;

figure 8 shows a schematic front view and a side view of a clamp according to another variant of the third embodiment of the invention; and

fig. 9 shows a schematic front view and a side view of a clamp according to a further variant of the third embodiment of the invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Fig. 4 shows a schematic front view and a side view of a clamp 1 according to a first embodiment of the invention. The clamp 1 comprises a base 4 and two clamping arms 5 extending in parallel in the longitudinal direction. Each gripper arm 5 comprises a fixed end 51 and an opposite free end 52, the base 4 being connected between the fixed ends 51 of the two gripper arms 5. The gripping arms 5 comprise a reinforcing structure which makes it possible that the two gripping arms 5 remain parallel at all times during the gripping of the packing using the clamp 1, i.e. the free ends 52 do not bend outwards as in the prior art.

As shown in fig. 4, the fixed end 51 of the holding arm 5 is widened compared with the free end 52, so that the holding arm 5 is in an inverted trapezoid shape in a front view, wherein the fixed end 51 and the free end 52 form a long base and a short base of the trapezoid respectively, thereby providing the reinforced structure of the present invention. The clamp 1 shown in fig. 4 can be obtained by simple sheet metal working of a thin metal plate.

Fig. 5 shows a schematic front view and a side view of a clamp 1 according to a second embodiment of the invention. Unlike the clamp 1 shown in fig. 4, the fixed end 51 of the holding arm 5 in fig. 5 is thickened instead of widened, thereby providing the reinforcing structure of the present invention. As shown in fig. 5, the thickness of the gripper arm 5 tapers from the fixed end 51 to the free end 52, and a thickening occurs on the outside of the gripper arm 5 to ensure that the inside surfaces of the two gripper arms 5 are parallel to each other.

As can be seen from fig. 3, the flaring phenomenon of the opening of the prior art clip 1 is mainly caused by the bending of the fixed end 51. In particular, a slight displacement or bending at the fixed end 51 will be transmitted to the entire gripping arm 5 and result in a deformation of the entire gripping arm 5, in particular a significant displacement will occur at the free end 52. Relatively speaking, minor displacements or bends occurring at or near the free end 52 do not spread throughout the gripping arm 5.

Based on this mechanical principle, the inventor provides a reinforcing structure as described above such that the fixed end 51 of the holding arm 5 is reinforced (widened or thickened) compared to the free end 52, thereby making the fixed end 51 less prone to deformation than the free end 52.

Fig. 6 to 9 show a schematic front view and side view of a clamp 1 according to a third embodiment of the invention. Unlike the widening or thickening of the fixed end 51 of the gripping arm 5 in fig. 4 and 5, the clamp 1 according to the third embodiment of the present invention provides a reinforcement rib 6 on the outside of the gripping arm 5 and near the fixed end 51, which reinforcement rib 6 extends from the fixed end 51 towards the free end 52 (may or may not extend to the free end 52) on the outside of the gripping arm 5, thereby providing a reinforcement structure according to the present invention.

As shown in fig. 6, the reinforcing rib 6 is in the form of a diagonal member 61. One end of the diagonal member 61 is provided at the extended portion 41 extending outward from the base portion 4, and the other end is provided on the outer side surface of the clamp arm 5. The other end of the diagonal member 61 may be located at one-half or two-thirds of the position of the clamp arm 5, or at the free end 52. The diagonal member 61 may be fixed to the extension 41 and the clamp arm 5 by welding.

Fig. 7 shows a variant of the embodiment shown in fig. 6, in which the reinforcing rib 6 is provided by a longitudinal bar 62 extending parallel to the gripper arm 5 and fixed to the outer side surface of the gripper arm 5. The longitudinal rod 62 extends from the fixed end 51, for example, to one half or two thirds of the clamping arm 5, or to the free end 52. The longitudinal bar 62 may be fixed to the gripping arm 5, for example by welding. According to the modification shown in fig. 7, the need to form the extensions 41 at both ends of the base 4 is eliminated.

Fig. 8 and 9 show a further variant of the embodiment shown in fig. 6, in which the reinforcing rib 6 is provided by a

longitudinal plate

63 or 64 fixed on the outer side surface of the holding arm 5. The

longitudinal plate

63 or 64 extends from the fixed end 51, for example, to one half or two thirds of the clamping arm 5 or to the free end 52. The

longitudinal plate

63 or 64 may be fixed to the clamp arm 5, for example by welding. The

longitudinal plate member

63 or 64 may be rectangular in shape. Alternatively, the

longitudinal plate

63 or 64 tapers from the fixed end 51 to the free end 52. In particular, the

longitudinal plate

63 or 64 is wedge-shaped.

As shown in fig. 9, the longitudinal plate member 64 may be used in combination with the extension 41 extending from the base 4, and one end of the longitudinal plate member 64 is fixed (e.g., welded) to the extension 41. As shown in fig. 8, the longitudinal plate member 63 may also be used alone, eliminating the need to form the extensions 41 at both ends of the base 4.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

For example, the solution of widening the fixed end 51 shown in fig. 4 may be used in combination with the solution of thickening the fixed end 51 shown in fig. 5, and may also be used in combination with the solution of reinforcing ribs shown in fig. 6 to 9. Such combinations are considered to be included within the scope of the present description.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A clamp (1) for clamping padding in a fabric padding process, characterized in that the clamp (1) comprises:

two gripper arms (5) extending in parallel in a longitudinal direction, each gripper arm (5) comprising a fixed end (51) and a free end (52) opposite to the fixed end (51); and

a base (4) connected between the fixed ends (51) of the two holding arms (5),

wherein the gripping arms (5) comprise a reinforcing structure configured such that when the charge is gripped between the two gripping arms (5), the two gripping arms (5) remain parallel to each other.

2. The clamp (1) according to claim 1, characterized in that the reinforcing structure is configured to widen the fixed end (51) of the clamping arm (5) in a transverse direction compared to the free end (52).

3. The clamp (1) according to claim 2, characterized in that the width of the clamping arm (5) in the transverse direction tapers from the fixed end (51) to the free end (52).

4. The clamp (1) according to claim 3, characterized in that said clamping arm (5) has a trapezoidal shape in said transverse direction, wherein said fixed end (51) and said free end (52) form the long and short base of said trapezoid, respectively.

5. The clamp (1) according to any one of claims 2 to 4, characterized in that the clamp (1) is a sheet metal part.

6. The clamp (1) according to claim 1, characterized in that the reinforcing structure is configured such that the fixed end (51) of the clamping arm (5) is thickened on the outside of the clamping arm (5) compared to the free end (52).

7. The clamp (1) according to claim 1, characterized in that the reinforcing structure is a reinforcing rib (6) extending from the fixed end (51) towards the free end (52) on the outside of the clamping arm (5).

8. The clamp (1) according to claim 7, characterized in that the base (4) comprises an extension (41) and the reinforcement rib (6) is a diagonal member (61) fixed between the extension (41) and the outer lateral surface of the clamping arm (5).

9. The clamp (1) according to claim 7, characterized in that the reinforcing rib (6) is a longitudinal bar (62) fixed on the outer side surface of the clamping arm (5) in the longitudinal direction.

10. The clamp (1) according to claim 7, characterized in that the stiffening rib (6) is a longitudinal plate (63, 64) fixed on one side to the outer side surface of the clamping arm (5) in the longitudinal direction.