Drop hammer impact clamp capable of adjusting any angle position and working method of drop hammer impact clamp

Abstract

The invention provides a drop hammer impact clamp capable of adjusting any angle position and a working method of the drop hammer impact clamp, and belongs to the technical field of drop hammer type impact clamps. The problems that a sample cannot be impacted at a special angle and any position of the surface of the sample cannot be impacted are solved. The device comprises a sample pressing rapid clamp, an X-direction moving plate, a Y-direction moving plate, an upper bottom plate, a lower bottom plate, rotating plates and supporting plates, the supporting plates are installed on the two sides of the lower bottom plate, the rotating plates are installed on the inner sides of the supporting plates, the two ends of the upper bottom plate are connected with the two rotating plates through bolts, the Y-direction moving plate is slidably installed on the upper bottom plate, and the Y-direction moving plate is slidably installed on the lower bottom plate. Y-direction fixed quick clamps are installed on the two sides of the Y-direction moving plate respectively, the X-direction moving plate is installed on the Y-direction moving plate in a sliding mode, X-direction fixed quick clamps are installed on the two sides of the X-direction moving plate respectively, and sample pressing quick clamps are installed at the four corners of the upper portion of the X-direction moving plate respectively. The device is mainly used for composite material structure impact testing.

Description

Technical Field

[0001] The invention belongs to the technical field of drop hammer impact fixtures, and in particular relates to a drop hammer impact fixture capable of adjusting any angle position and a working method thereof. Background Art

[0002] With the improvement of composite material technology, various structural parts made of composite materials have increased significantly. However, related plates made of composite materials, such as composite laminates, fiber metal laminates, and composite honeycomb sandwich panels composed of composite materials as panels, are particularly susceptible to low-speed impact loads. In order to evaluate the impact resistance of related plates made of composite materials, a large number of related drop hammer impact testing machines have come into being. However, after investigation, it was found that the fixtures of various current drop hammer impact testing machines can only clamp the specimens for vertical positive impact, and cannot cooperate with the drop hammer impact testing machine to achieve clamping at different impact angles. In reality, the impact of foreign objects on composite material related plates usually has a certain angle, that is, the impact experienced by most composite material related plates is oblique impact. What exactly is the mechanical performance of composite material related plates in resisting low-speed oblique impact must be revealed through a large number of related oblique impact tests.

[0003] The existing Chinese invention patent with publication number CN110658059A discloses a drop hammer type multi-angle impact fixture with stable impact position, wherein both side plates of the rotating frame are semi-disc-shaped and both side plates are evenly distributed along their circumferential direction, and wall panels are vertically arranged on the outer sides of the two side panels, and a rotation groove adapted for the side panels is provided on the inner side of the upper portion of the wall panel, and the rotation groove is provided with a second fixing hole which matches the first fixing hole at the same circumferential position as the side panel, and the side panel is embedded in the rotation groove and can rotate freely in the rotation groove, and when the rotating frame is rotated to the required impact angle, at least two groups of connected first fixing holes and second fixing holes are selected on the outer side of the wall panel, and fasteners are inserted into the first fixing holes and the second fixing holes to fix the rotating frame, but the device can only achieve impact at a specific angle by adjusting the pin position, and cannot achieve impact at a special angle.

[0004] The existing Chinese invention patent with publication number CN118777046A discloses a drop hammer impact fixture with adjustable impact position and its use method, which belongs to the technical field of drop hammer impact fixtures. The fixture includes a limit plate, a clamp, a gauge block and a standard test bench. The limit plate is placed on the square through hole of the standard test bench, and positioning pins for determining the position of the limit plate are provided around the square through hole. The limit plate is provided with a groove for fixing the test piece and a U-shaped through groove for placing the gauge block. The clamp is fixed on the standard test bench, and the adjustment rod and the fixed rod in the clamp are rotatably connected to adjust the position of the pressure foot under the adjustment rod to ensure that the relative position of the pressure foot and the test piece are always consistent. The clamp is equipped with different gauge blocks for calibrating the impact position that deviates from the center by a specific distance. However, the device controls the offset size by using different gauge blocks and can only perform offset in one direction. It cannot achieve impact at any position on the surface of the specimen, and has certain limitations. Summary of the Invention In view of this, the present invention aims to provide a drop hammer impact fixture that can be adjusted to any angle position and a working method thereof, so as to solve the problem that the sample cannot be impacted at a specific angle or at any position on the sample surface.

[0005] To achieve the above-mentioned object, the present invention adopts the following technical solution: a drop hammer impact fixture that can be adjusted to any angle position, comprising a sample clamping quick clamp, an X-direction fixed quick clamp, an X-direction movable plate, a Y-direction movable plate, a Y-direction fixed quick clamp, an upper base plate, a lower base plate, a rotating plate and a support plate, wherein support plates are installed on both sides of the lower base plate, a rotating plate is installed on the inner side of the support plate, both ends of the upper base plate are connected to the two rotating plates by bolts, the Y-direction movable plate is slidably mounted on the upper base plate, Y-direction fixed quick clamps are installed on both sides of the Y-direction movable plate, the X-direction movable plate is slidably mounted on the Y-direction movable plate, X-direction fixed quick clamps are installed on both sides of the X-direction movable plate, and sample clamping quick clamps are installed at the four corners above the X-direction movable plate.

[0006] Furthermore, an X-direction locking block is installed in the groove at the bottom of the Y-direction moving plate.

[0007] Furthermore, a Y-direction locking block is installed in the groove at the bottom of the upper base plate.

[0008] Furthermore, a U-shaped groove is provided at the center position above the support plate, the rotating shaft of the rotating plate cooperates with the U-shaped groove, and a bearing is installed on the outer side of the rotating shaft.

[0009] Furthermore, a friction plate is provided on the inner side of the rotating plate.

[0010] Furthermore, the friction plate is connected to the support plate through a friction plate fixing quick clamp.

[0011] Furthermore, the surface of the friction plate is sandblasted or coated with a wear-resistant material.

[0012] Furthermore, the sides of the X-direction moving plate, the Y-direction moving plate, the upper base plate and the supporting plate are all provided with steel-printed scales.

[0013] A method for operating a drop hammer impact fixture capable of adjusting any angle position comprises the following steps: Step 1: Place the specimen on the X-direction moving plate and fix it with a specimen clamping quick clamp; Step 2: Adjust the positions of the X-direction moving plate and the Y-direction moving plate according to the test requirements, and then fix the X-direction moving plate and the Y-direction moving plate using the X-direction fixed quick clamp and the Y-direction fixed quick clamp respectively; Step 3: Rotate the rotating plate, adjust the angle of the sample through the upper base plate, and fix the rotating plate with the friction plate and the friction plate fixing quick clamp; Step 4: Perform a drop weight impact test on the specimen.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention moves the X-direction moving plate and the Y-direction moving plate to adjust the sample's arbitrary landing point in the X and Y directions. The steel-stamped scale between the plates provides accurate displacement distance parameters, and the quick clamp and frosted locking block achieve rapid movement and fixation.

[0015] 2. The present invention can realize the impact of landing points at any position within the range of 250*150mm in the X and Y directions, and can realize rapid adjustment of the position, providing stable and reliable connection support.

[0016] 3. The present invention can realize rotation fixation at any angle. The large contact area of ​​the friction plate provides sufficient locking force, the arc groove provides stable support, the angle is determined by the ruler, and the quick clamp realizes rapid locking. The operation is convenient, fast and accurate.

[0017] 4. The fixture of the present invention has an accurate landing point after rotation, and the sample landing plane and the rotation axis are in the same plane and the same rotation axis, which can solve the problem of landing point position offset caused by the upper surface of the sample and the rotation axis not being in the same plane after the sample is rotated.

[0018] 5. All fixing operations of the present invention are achieved through quick clamps and frosted locking blocks and friction plates. Compared with bolt locking, the operation is simple and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings: Figure 1 This is a schematic structural diagram of a drop hammer impact fixture capable of adjusting to any angle position according to the present invention; Figure 2 This is an exploded diagram of the drop hammer impact fixture that can be adjusted to any angle position according to the present invention.

[0020] In the picture: 1-Specimen clamping quick clamp, 2-X direction fixed quick clamp, 3-X direction moving plate, 4-Y direction moving plate, 5-X direction locking block, 6-Y direction fixed quick clamp, 7-Upper base plate, 8-Y direction locking block, 9-Lower base plate, 10-Friction plate, 11-Rotating plate, 12-Support plate, 13-Bearing shell, 14-Friction plate fixed quick clamp. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features therein can be combined with each other in the absence of conflict, and the embodiments described are only part of the embodiments of the present invention, not all of the embodiments.

[0022] Specific implementation 1: See Figure 1-2 Describe this embodiment, a drop hammer impact fixture that can be adjusted to any angle position, including a sample clamping quick clamp 1, an X-direction fixed quick clamp 2, an X-direction movable plate 3, a Y-direction movable plate 4, a Y-direction fixed quick clamp 6, an upper base plate 7, a lower base plate 9, a rotating plate 11 and a support plate 12, wherein support plates 12 are installed on both sides of the lower base plate 9, a rotating plate 11 is installed on the inner side of the support plate 12, and both ends of the upper base plate 7 are connected to the two rotating plates 11 by bolts, the Y-direction movable plate 4 is slidably mounted on the upper base plate 7, the Y-direction fixed quick clamp 6 is installed on both sides of the Y-direction movable plate 4, the X-direction movable plate 3 is slidably mounted on the Y-direction movable plate 4, the X-direction fixed quick clamp 2 is installed on both sides of the X-direction movable plate 3, and the sample clamping quick clamp 1 is installed at the four corners above the X-direction movable plate 3.

[0023] Place the sample on the X-direction movable plate 3 and secure it with the sample clamping quick-release clamp 1. Adjust the positions of the X-direction movable plate 3 and the Y-direction movable plate 4 according to the test requirements. Then, secure the X-direction movable plate 3 and the Y-direction movable plate 4 with the X-direction securing quick-release clamp 2 and the Y-direction securing quick-release clamp 6, respectively. Rotate the rotating plate 11, adjust the angle of the sample with the upper base plate 7, and secure the rotating plate 11 with the friction plate 10 and the friction plate securing quick-release clamp 14. Perform a drop hammer impact test on the sample.

[0024] The specimen is placed in the X-direction movable plate 3 and fixed by the specimen clamping quick clamp 1. The X-direction movable plate 3 and the Y-direction movable plate 4 are matched by the matching guide protrusion structure of the X-direction movable plate 3 and the inner opening of the Y-direction movable plate 4 to achieve linear movement in the X-direction. The X-direction fixed quick clamp 2 and the X-direction locking block 5 work together to fix and lock the X-direction movable plate 3 and the Y-direction movable plate 4. The X-direction locking block 5 will be hidden in the groove on the bottom side of the Y-direction movable plate 4 to avoid affecting the movement of the movable plate. The sides of the X-direction movable plate 3 and the Y-direction movable plate 4 are engraved with scale lines. The relative position of the specimen in the plane can be determined by the offset size displayed by the two sets of scale lines, thereby achieving the effect of accurate movement.

[0025] After the X-direction movable plate 3 is locked, the matching guide protrusion of the Y-direction movable plate 4 cooperates with the inner opening of the upper base plate 7 to realize Y-direction movement. The Y-direction fixed quick clamp 6 and the Y-direction locking block 8 work together to fix and lock the Y-direction movable plate and the upper base plate 7. The Y-direction locking block 8 will be hidden in the groove on the bottom side of the upper base plate 7 to avoid affecting the movement of the movable plate. The Y-direction movable plate 4 and the upper base plate 7 are engraved with scale lines on the side surfaces. The relative position of the sample in the plane can be determined by the offset size displayed by the two sets of scale lines, thereby achieving the effect of accurate movement.

[0026] The upper base plate 7 is connected to the rotating plate 11 by bolts. The rotating plate 11 is placed in the U-shaped groove of the support plate 12 to provide stable support and rotation guide. The rotating axis cooperates with the groove of the support plate 12 to ensure that the axis will not shift when the structure rotates. An observation port and a scale pointer are provided under the support plate 12, which are used to cooperate with the angle scale line on the side of the rotating plate 11 to determine the rotation angle. When it is rotated to the appropriate angle, the friction plate 10 is driven by the friction plate fixing quick clamp 14 to fix the rotating plate 11 between the support plate 12 and the friction plate 10.

[0027] In this embodiment, an X-direction locking block 5 is installed in the groove at the bottom of the Y-direction moving plate 4. The direction-fixing quick clamp 2 and the X-direction locking block 5 work together to fix and lock the X-direction moving plate 3 and the Y-direction moving plate 4, wherein the X-direction locking block 5 will be hidden in the groove on the bottom side of the Y-direction moving plate 4 to avoid affecting the movement of the moving plate.

[0028] In this embodiment, a Y-direction locking block 8 is installed in the groove at the bottom of the upper base plate 7. The Y-direction fixed quick clamp 6 and the Y-direction locking block 8 work together to fix and lock the Y-direction movable plate and the upper base plate 7, wherein the Y-direction locking block 8 will be hidden in the groove on the bottom side of the upper base plate 7 to avoid affecting the movement of the movable plate.

[0029] In this embodiment, a U-shaped groove is provided at the center position above the support plate 12, the rotating axis of the rotating plate 11 cooperates with the U-shaped groove, and a bearing 13 is installed on the outside of the rotating axis. The rotating plate 11 is placed in the U-shaped groove of the support plate 12 to provide stable support and rotation guidance. The rotating axis cooperates with the groove of the support plate 12 to ensure that the axis center will not shift when the structure rotates.

[0030] In this embodiment, a friction plate 10 is provided on the inner side of the rotating plate 11, and the friction plate 10 is connected to the support plate 12 through a friction plate fixing quick clamp 14. When rotated to a suitable angle, the friction plate fixing quick clamp 14 drives the friction plate 10 to fix the rotating plate 11 between the support plate 12 and the friction plate 10.

[0031] In this embodiment, the surface of the friction plate 10 is sandblasted or coated with a wear-resistant material. The surface of the friction plate 10 can be treated by sandblasting or with a special wear-resistant material to increase friction, thereby improving the clamping effect.

[0032] In this embodiment, the sides of the X-direction moving plate 3, the Y-direction moving plate 4, the upper base plate 7 and the support plate 12 are all provided with steel-stamped scales, and the relative position of the sample in the plane can be determined by the offset size displayed by the scale lines, thereby achieving the effect of accurate movement.

[0033] Specific implementation method 2: See Figure 1-2 The present embodiment describes a method for operating a drop hammer impact fixture that can be adjusted to any angular position, comprising the following steps: Step 1: Place the sample on the X-direction movable plate 3 and fix it with the sample clamping quick clamp 1; Step 2: Adjust the positions of the X-direction moving plate 3 and the Y-direction moving plate 4 according to the test requirements, and then fix the X-direction moving plate 3 and the Y-direction moving plate 4 using the X-direction fixed quick clamp 2 and the Y-direction fixed quick clamp 6 respectively; Step 3: Rotate the rotating plate 11, adjust the angle of the sample through the upper base plate 7, and fix the rotating plate 11 through the friction plate 10 and the friction plate fixing quick clamp 14; Step 4: Perform a drop weight impact test on the specimen.

[0034] The specific embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The specific embodiments do not describe all details in detail, nor do they limit the invention to the specific embodiments described. Numerous modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention.

Claims

1. A drop hammer impact fixture that can be adjusted to any angle, characterized by: The invention comprises a sample pressing quick clamp (1), an X-direction fixed quick clamp (2), an X-direction movable plate (3), a Y-direction movable plate (4), a Y-direction fixed quick clamp (6), an upper base plate (7), a lower base plate (9), a rotating plate (11) and a support plate (12), wherein both sides of the lower base plate (9) are provided with support plates (12), the inner side of the support plate (12) is provided with a rotating plate (11), both ends of the upper base plate (7) are connected to the two rotating plates (11) by bolts, the Y-direction movable plate (4) is slidably mounted on the upper base plate (7), both sides of the Y-direction movable plate (4) are provided with Y-direction fixed quick clamps (6), the X-direction movable plate (3) is slidably mounted on the Y-direction movable plate (4), both sides of the X-direction movable plate (3) are provided with X-direction fixed quick clamps (2), and the four corners above the X-direction movable plate (3) are provided with sample pressing quick clamps (1).

2. The drop hammer impact fixture capable of adjusting to any angle according to claim 1, characterized in that: An X-direction locking block (5) is installed in the groove at the bottom of the Y-direction moving plate (4).

3. The drop hammer impact fixture capable of adjusting to any angle according to claim 1, characterized in that: A Y-direction locking block (8) is installed in the groove at the bottom of the upper base plate (7).

4. The drop hammer impact fixture capable of adjusting to any angle according to claim 1, characterized in that: A U-shaped groove is provided at the center position above the support plate (12), the rotating shaft of the rotating plate (11) cooperates with the U-shaped groove, and a bearing bush (13) is installed on the outer side of the rotating shaft.

5. The drop hammer impact fixture capable of adjusting to any angle according to claim 5, characterized in that: A friction plate (10) is provided on the inner side of the rotating plate (11).

6. The drop hammer impact fixture capable of adjusting to any angle according to claim 6, characterized in that: The friction plate (10) is connected to the support plate (12) via a friction plate fixing quick clamp (14).

7. The drop hammer impact fixture capable of adjusting to any angle according to claim 6, characterized in that: The surface of the friction plate (10) is sandblasted or coated with a wear-resistant material.

8. The drop hammer impact fixture capable of adjusting to any angle according to claim 1, characterized in that: The sides of the X-direction moving plate (3), the Y-direction moving plate (4), the upper base plate (7) and the support plate (12) are all provided with steel-stamped scales.

9. A method for operating the drop hammer impact fixture capable of adjusting to any angle as claimed in any one of claims 1 to 8, characterized in that: It includes the following steps: Step 1: Place the specimen on the X-direction moving plate (3) and fix it with the specimen clamping quick clamp (1); Step 2: According to the test requirements, adjust the positions of the X-direction moving plate (3) and the Y-direction moving plate (4), and then fix the X-direction moving plate (3) and the Y-direction moving plate (4) respectively using the X-direction fixed quick clamp (2) and the Y-direction fixed quick clamp (6); Step 3: Rotate the rotating plate (11), adjust the angle of the sample through the upper base plate (7), and fix the rotating plate (11) through the friction plate (10) and the friction plate fixing quick clamp (14); Step 4: Perform a drop weight impact test on the specimen.

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