Drop weight testing machine for testing strength of structural adhesive

Abstract

The utility model relates to the technical field of testing, in particular to a drop hammer testing machine for testing structural adhesive strength, which comprises a main body and a rotating and fixing seat part, a bearing and adjusting part is mounted on the upper side of the main body, a drop hammer part is mounted on the upper side of the bearing and adjusting part, a control host is mounted on the right side of the bearing and adjusting part, and the main body comprises a box body. A door plate is connected to the front side of the box body through a hinge, partition plates are fixedly connected to the two sides of the interior of the box body, the rotating and fixing seat part comprises a shaft rod movably connected with a middle hole position of the box body, the front end of the shaft rod is fixedly connected with a seat body located between one set of partition plates, and the rear end of the shaft rod is fixedly connected with a limiting block. According to the drop-weight testing machine, the structural adhesive can be arranged on a plate capable of being tested by the drop-weight testing machine through structures such as the rotating and fixing seat part, the positioning module and the heating dryer, and the strength test of the structural adhesive can be completed through an impact test on the plate.

Description

Technical Field

[0001] The utility model relates to the technical field of testing, in particular to a drop hammer testing machine for testing the strength of structural adhesives. Background Technique

[0002] High-strength structural adhesives for vehicle bodies are used for bonding parts that are not easily spot-welded or whose strength still does not meet requirements after spot-welding during automobile manufacturing. After bonding, they have high durability and can improve the stiffness and collision resistance of the vehicle body. Without high-strength structural adhesives for automobiles, the performance of the vehicle body will be affected. Therefore, automobile manufacturers pay more attention to the requirements for the adhesives used for high-strength structural adhesives in automobiles. To ensure the performance and technical standards of the use requirements of high-strength structural adhesives in automobiles, it is necessary to conduct impact tests on structural adhesives to test their strength.

[0003] Existing equipment for conducting impact tests generally uses drop hammer testing machines. Its principle is to use a drop hammer in free fall to impact and load the test piece, so as to study the response of materials and structures under impact loads. Although existing drop hammer testing machines can conduct impact tests on various material workpieces, they are generally applied to the tests of solid workpiece structures and are difficult to conduct strength tests on structural adhesives. Therefore, a drop hammer testing machine for testing the strength of structural adhesives is proposed according to the above problems. Summary of the Invention

[0004] The purpose of the utility model is to provide a drop hammer testing machine for testing the strength of structural adhesives to solve the problem that existing drop hammer testing machines are difficult to conduct impact strength tests on structural adhesives.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A drop hammer testing machine for the strength test of structural adhesives, comprising a main body and a rotating and fixing seat part. A load-bearing adjustment part is installed on the upper side of the main body, a drop hammer part is installed on the upper side of the load-bearing adjustment part, and a control host is installed on the right side of the load-bearing adjustment part. The main body includes a box body, a door panel is hinged to the front side of the box body, partition plates are fixedly connected to both sides inside the box body. The rotating and fixing seat part includes a shaft rod movably connected to the middle hole position of the box body. A seat body is fixedly connected to the front end of the shaft rod and is located between a group of partition plates. A limiting block is fixedly connected to the rear end of the shaft rod. A handle is fixedly connected to the front side groove of the seat body. A counterbore is opened at the upper end face position of the seat body, and a positioning module is installed inside the counterbore. The positioning module includes a bottom plate, side-mounted parts, limiting parts, a control frame and a test plate. The bottom plate is fixed inside the counterbore. Side-mounted parts are fixedly connected to both sides of the upper end face of the bottom plate. Each side-mounted part includes a base plate. A rotating bar is rotatably connected to the upper side opening of the base plate. A slot is opened on the lower side of the rotating bar. An installation shell is fixedly connected to the end of the rotating bar away from the base plate. A test plate is installed inside the installation shell. A rail plate is fixedly connected to the groove of the base plate. A group of two positioning rods are fixedly connected to the groove of the base plate and are located below the rail plate. The limiting parts are all installed inside the side-mounted parts. Each limiting part includes a rail frame slidably connected to the rail plate. A guide rod is fixedly connected to the lower end face of the middle plate of the rail frame and is slidably connected to the hole of the rail plate. A second spring is sleeved on the outer side of the guide rod and is located above the rail plate. Positioning notches are opened at both ends inside the lower part of the rail frame. An insertion bar inserted inside the slot is fixedly connected to the upper side of the rail frame. A control frame is fixedly connected between a group of the rail frames. A heating and drying device is installed inside the box body and is located below the rotating and fixing seat part.

[0007] Preferably, the drop hammer part is composed of a frame body, a guide rod, a motor, a reel, a pull rope, an electric clamping part and a hammer part. A through hole is provided on the lower plate of the frame body of the drop hammer part, and the hammer part of the drop hammer part is arranged vertically aligned with the through hole. The control host is electrically connected to the motor and the electric clamping part of the drop hammer part. The control host is electrically connected to the heating and drying device.

[0008] Preferably, the outer curved surface of the seat body fits the inner curved surface of the partition plate. The front end face of the seat body and the front end face of the partition plate are on the same plane. The front end face of the seat body and the front end face of the handle are on the same plane. The rear end face of the door panel and the front end face of the seat body are on the same plane.

[0009] Preferably, a gap is provided between a group of the test plates. The test plates are all horizontally arranged. The test plates and the bottom plate are parallel to each other vertically. A distance is left between the test plates and the bottom plate. A distance is left between the front end face of the test plate and the middle rod of the control frame. The positioning module will not interfere with the partition plate when rotating with the rotating and fixing seat part.

[0010] Preferably, the rail frames are all arranged inside the channel of the substrate, the front and rear end faces of the rail frames are in contact with the front and rear inner walls of the channel of the substrate, the positioning rods are all arranged on the lower side of the positioning notch, and the positioning notch is composed of a set of two circular grooves, a lower corner groove, and a through groove connecting the circular grooves and the corner groove.

[0011] Preferably, a first spring is sleeved outside the shaft rod, the first spring is arranged between the front end face of the limiting block and the rear end face of the box body, a positioning disk sleeved outside the shaft rod is fixedly connected in the inner wall circular groove of the box body, a scale ring is fixedly connected in the inner wall annular groove of the box body, clamping blocks inserted into the engraved grooves of the positioning disk are fixedly connected in the two side slots at the rear end face of the seat body, a finger block is fixedly connected at the middle line position of the upper end face of the seat body, the load-bearing adjustment part includes a seat plate fixed on the box body, a through opening is formed in the upper side plate body of the seat plate, tracks are fixedly connected to both sides of the upper part of the seat plate, the frame of the drop hammer part is slidably connected with a set of tracks, and an electric cylinder with its output end fixedly connected to the frame of the drop hammer part is fixedly connected to the upper side of the seat plate.

[0012] Preferably, the electric cylinder, the heating and drying device and the control host are electrically connected, the through opening and the through hole of the drop hammer part are vertically communicated, and the length dimension of the through opening is larger than the diameter dimension of the through hole of the drop hammer part.

[0013] Preferably, a set of thirty-six equally-angled engraved grooves are arranged on the inner side of the front end face of the positioning disk, a set of thirty-six equally-angled marking lines are arranged on the front end face of the scale ring, the engraved grooves of the positioning disk and the marking lines of the scale ring are aligned one by one inside and outside, and the clamping block is composed of a sector plate and a set of three equally-angled convex strips.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] 1. In the present utility model, through structures such as the rotation and fixation seat part, positioning module, and heating and drying device, a set of side-mounted parts of the positioning module can install a set of test plates, and the limiting part can position the side-mounted parts, enabling a set of test plates to be kept horizontal. Structural adhesive can be applied between a set of test plates to obtain test plates after bonding. By rotating the rotation and fixation seat part, the test plates after bonding can be driven to displace downward. The structural adhesive is quickly dried and cured by the heating and drying device. After curing, an integrated test plate is obtained. At this time, the rotation and fixation seat part is reset and rotated back, causing the integrated test plate to be displaced to the upper side of the partition. At this time, due to the curing of the structural adhesive, the integrated test plate bonded together by the structural adhesive will still remain horizontal. At this time, the integrated test plate can be subjected to an impact test by the drop hammer part, realizing that the drop hammer testing machine can set the structural adhesive on the plate that can be tested. Through the impact test on the plate, the strength test of the structural adhesive can be completed, solving the problem that it is difficult for the existing drop hammer testing machine to conduct an impact strength test on the structural adhesive;

[0016] 2. In the present utility model, through structures such as the load-bearing adjustment part, rotation and fixation seat part, positioning disk, and scale ring, the rotation and fixation seat part can drive the positioning module to rotate. The operation is as follows: Pull the seat body forward by the handle, thereby driving the shaft rod, limiting block, and clamping block to move forward. The forward movement of the limiting block causes the first spring to contract, and the forward movement of the clamping block will disengage from the engraved groove of the positioning disk. At this time, the seat body can be rotated at the required angle in cooperation with the finger block and the scale ring. After rotating to the required angle, release the handle. The expansion and reset of the first spring can drive the limiting block, shaft rod, seat body, and clamping block to move backward, causing the clamping block to insert into the corresponding engraved groove of the positioning disk to complete the positioning of the seat body and the rotation of the rotation and fixation seat part. By rotating the rotation and fixation seat part, the integrated test plate can be tilted at an angle, and at the same time, the impact point of the hammer part of the drop hammer part can be adjusted according to the needs of the user, that is, controlling the expansion and contraction of the electric cylinder to drive the drop hammer part to perform a lateral displacement guided by the track to complete the adjustment of the impact point of the hammer part of the drop hammer part, realizing that the drop hammer testing machine can conduct an impact test on the structural adhesive at different angles and different points, solving the problem that the existing drop hammer testing machine generally can only conduct an impact test on the test piece at a single angle, resulting in relatively single measured data. Description of the Drawings

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is the present utility model Figure 1 schematic diagram of the door panel opening structure;

[0019] Figure 3 is the present utility model Figure 2 schematic diagram of the rear view structure;

[0020] Figure 4It is a schematic structural view of the main body of the present utility model;

[0021] Figure 5 It is a schematic structural view of the positioning disk of the present utility model;

[0022] Figure 6 It is a schematic structural view of the rotation and fixation seat part of the present utility model;

[0023] Figure 7 It is the present utility model Figure 6 A schematic structural view from another perspective;

[0024] Figure 8 It is a schematic structural view of the load-bearing adjustment part of the present utility model;

[0025] Figure 9 It is a schematic structural view of the positioning module of the present utility model;

[0026] Figure 10 It is a schematic structural view of the side-mounted part of the present utility model;

[0027] Figure 11 It is a schematic structural view of the limiting part of the present utility model;

[0028] Figure 12 It is a schematic structural view of the control frame of the present utility model.

[0029] In the figure: 1. Main body; 11. Box body; 12. Door panel; 13. Partition board; 14. Positioning disk; 15. Scale ring; 2. Load-bearing adjustment part; 21. Seat plate; 22. Through hole; 23. Track; 24. Electric cylinder; 3. Drop hammer part; 4. Control host; 5. Rotation and fixation seat part; 51. Shaft rod; 52. Seat body; 53. Limiting block; 54. Handle; 55. Sunk groove; 56. First spring; 57. Finger block; 58. Clamping block; 6. Positioning module; 61. Bottom plate; 62. Side-mounted part; 621. Substrate; 622. Rotating bar; 623. Installation shell; 624. Slot; 625. Rail plate; 626. Positioning rod; 63. Limiting part; 631. Rail frame; 632. Guide rod; 633. Second spring; 634. Positioning notch; 635. Insert bar; 64. Control frame; 65. Test plate; 7. Heating and drying device. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] It should be noted that the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] Unless otherwise specifically stated, the relative arrangements of the components and steps set forth in these embodiments, numerical expressions and values do not limit the scope of the present invention. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed herein, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not require further discussion in subsequent drawings.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present invention; the orientation words "inner, outer" refer to the inside and outside relative to the contour of each component itself.

[0034] For ease of description, spatial relative terms, such as "above", "over", "on the upper surface", "upper", etc., may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used herein will be made accordingly.

[0035] In addition, it should be noted that the use of terms such as "first" and "second" to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present utility model.

[0036] Please refer to Figures 1-12 , the present utility model provides a technical solution:

[0037] A drop hammer testing machine for testing the strength of structural adhesives, comprising a main body 1 and a rotating and fixing seat part 5. A load-bearing adjusting part 2 is installed on the upper side of the main body 1, a drop hammer part 3 is installed on the upper side of the load-bearing adjusting part 2, and a control host 4 is installed on the right side of the load-bearing adjusting part 2. The main body 1 includes a box body 11, a door panel 12 is hinged to the front side of the box body 11, partition plates 13 are fixedly connected to both sides inside the box body 11. The rotating and fixing seat part 5 includes a shaft rod 51 movably connected to the middle hole position of the box body 11. The front end of the shaft rod 51 is fixedly connected to a seat body 52 located between a group of partition plates 13. The rear end of the shaft rod 51 is fixedly connected to a limit block 53. A handle 54 is fixedly connected to the front side slot of the seat body 52. A counterbore 55 is opened at the upper end surface position of the seat body 52. A positioning module 6 is installed inside the counterbore 55. The positioning module 6 includes a bottom plate 61, a side-mounted part 62, a limiting part 63, a control frame 64 and a test plate 65. The bottom plate 61 is fixed inside the counterbore 55. Side-mounted parts 62 are fixedly connected to both sides of the upper end surface of the bottom plate 61. The side-mounted part 62 includes a base plate 621. A rotating bar 622 is rotatably connected to the upper side opening of the base plate 621. A slot 624 is opened on the lower side of the rotating bar 622. An installation shell 623 is fixedly connected to the end of the rotating bar 622 away from the base plate 621. A test plate 65 is installed inside the installation shell 623. A rail plate 625 is fixedly connected to the channel of the base plate 621. A group of two positioning rods 626 are fixedly connected to the channel of the base plate 621 and are located below the rail plate 625. The limiting parts 63 are all installed inside the side-mounted parts 62. The limiting part 63 includes a rail frame 631 slidably connected to the rail plate 625. A guide rod 632 slidably connected to the hole position of the rail plate 625 is fixedly connected to the lower end surface of the middle plate of the rail frame 631. A second spring 633 is sleeved on the outer side of the guide rod 632 and is located above the rail plate 625. Positioning notches 634 are opened at both inner ends of the lower part of the rail frame 631. An insertion bar 635 inserted inside the slot 624 is fixedly connected to the upper side of the rail frame 631. A control frame 64 is fixedly connected between a group of rail frames 631. A heating and drying device 7 is installed inside the box body 11 and is located below the rotating and fixing seat part 5.

[0038] As Figure 2 , Figures 4-8As shown, the drop hammer part 3 is composed of a frame body, a guide rod, a motor, a reel, a pulling rope, an electric clamping part and a hammer part. A through hole is provided on the lower plate of the frame body of the drop hammer part 3, and the hammer part of the drop hammer part 3 is arranged vertically aligned with the through hole. The control host 4 is electrically connected to the motor and the electric clamping part of the drop hammer part 3, and the control host 4 is electrically connected to the heating and drying device 7. Through this setting, the control host 4 can control the electrical equipment of the drop hammer part 3; the outer curved surface of the seat body 52 fits with the inner curved surface of the partition plate 13, the front end surface of the seat body 52 and the front end surface of the partition plate 13 are arranged on the same plane, and the front end surface of the seat body 52 and the front end surface of the handle 54 are arranged on the same plane. Through this setting, the handle 54 can be completely received in the seat body 52, so that the handle 54 does not interfere with the closed door panel 12. The rear end surface of the door panel 12 and the front end surface of the seat body 52 are arranged on the same plane, so that after the door panel 12 closes the box body 11, the partition plate 13 and the rotary fixing seat part 5 can divide the box body 11 into regions; there is a gap between a group of test plates 65, and the test plates 65 are all arranged horizontally. Through this setting, structural adhesive can be applied between a group of test plates 65. The test plates 65 and the bottom plate 61 are arranged parallel to each other up and down, and there is a spacing between the test plates 65 and the bottom plate 61. Through this setting, the test plates 65 can rotate downward. There is a spacing between the front end surface of the test plate 65 and the middle rod of the control frame 64. Through this setting, the downward rotation of the test plate 65 is not interfered by the control frame 64, and the positioning module 6 will not interfere with the partition plate 13 when rotating with the rotary fixing seat part 5; the rail frames 631 are all arranged inside the grooves of the substrate 621, and the front and rear end surfaces of the rail frames 631 fit with the front and rear inner walls of the grooves of the substrate 621. Through this setting, the grooves of the substrate 621 can guide the rail frames 631 up and down. The positioning rods 626 are all arranged below the positioning slots 634. The positioning slots 634 are composed of a group of two circular slots, a lower corner slot and a through slot connecting the circular slots and the corner slot. Through this setting, when the rail frame 631 moves downward, the positioning slots 634 can clamp the positioning rods 626;A first spring 56 is sleeved outside the shaft rod 51. The first spring 56 is arranged between the front end face of the limit block 53 and the rear end face of the box body 11. A positioning disk 14 sleeved outside the shaft rod 51 is fixedly connected in the inner wall circular groove of the box body 11. A scale ring 15 is fixedly connected in the inner wall annular groove of the box body 11. Clamping blocks 58 inserted into the engraved grooves of the positioning disk 14 are fixedly connected in the groove positions on both sides of the rear end face of the seat body 52. A finger block 57 is fixedly connected at the midline position of the upper end face of the seat body 52. The load-bearing adjustment part 2 includes a seat plate 21 fixed on the box body 11. A through port 22 is formed in the upper side plate body of the seat plate 21. Guide rails 23 are fixedly connected to both sides of the upper part of the seat plate 21. The frame of the drop hammer part 3 is slidably connected with a group of guide rails 23. An electric cylinder 24 whose output end is fixedly connected to the frame of the drop hammer part 3 is fixedly connected above the seat plate 21. Through this setting, the rotation fixing seat part 5 can drive the positioning module 6 to rotate. Through the rotation of the rotation fixing seat part 5, the integrated test plate 65 can be driven to tilt at an angle. At the same time, the landing point of the hammer part of the drop hammer part 3 can be adjusted according to the needs of the user, that is, by controlling the expansion and contraction of the electric cylinder 24, the drop hammer part 3 is driven to perform a lateral displacement guided by the guide rail 23 to complete the adjustment of the landing point of the hammer part of the drop hammer part 3; the electric cylinder 24, the heating and drying device 7 and the control host 4 are electrically connected. Through this setting, the control host 4 can control the operation of the electric cylinder 24 and the heating and drying device 7. The through port 22 and the through hole of the drop hammer part 3 are vertically communicated. The length dimension of the through port 22 is larger than the diameter dimension of the through hole of the drop hammer part 3. Through this setting, the hammer part of the drop hammer part 3 after displacement can still pass through the through port 22 and enter the box body 11; a group of thirty-six equally-angled engraved grooves are arranged on the inner side of the front end face of the positioning disk 14. A group of thirty-six equally-angled scale lines are arranged on the front end face of the scale ring 15. Through this setting, the scale ring 15 cooperating with the finger block 57 can be used as a reference for the rotation angle of the seat body 52. The engraved grooves of the positioning disk 14 and the scale lines of the scale ring 15 are aligned one by one inside and outside. The clamping block 58 is composed of a sector plate and a group of three equally-angled convex strips. Through this setting, the clamping block 58 can also be clamped into the engraved groove of the positioning disk 14 after rotation.;

[0039] Workflow: The operation of the drop hammer testing machine for testing the strength of structural adhesives is as follows. Note 1: All electrical appliances of this equipment are used with an external power supply and are controlled through the control host 4. First, open the door panel 12 of the box body 11, insert the two test plates 65 into the mounting shells 623 of the side mounting parts 62 on both sides respectively, then turn a group of test plates 65 flat, and push them up by the elastic force of the second spring 633 to drive the rail frame 631 to drive the insert bar 635 to insert into the slot 624 of the rotating bar 622, so as to position the rotating bar 622 and make the rotating bar 622 unable to rotate. At this time, a group of test plates 65 are in a horizontal state with left and right alignment, and there will be a gap between a group of test plates 65 at this time. Through the above operations, the installation of the test plates 65 is completed. Then, apply the structural adhesive to be tested between a group of test plates 65 to fill the gap between a group of test plates 65, complete the addition of the structural adhesive, and obtain the bonded test plates 65. At this time, in order to improve the curing speed of the structural adhesive, the rotating fixing seat part 5 can be rotated by 180°. The rotation of the rotating fixing seat part 5 can drive the displacement of the bonded test plates 65. Close the door panel 12. At this time, start the heating and drying device 7 to dry the structural adhesive of the bonded test plates 65, so as to accelerate the curing speed of the structural adhesive. After the structural adhesive is cured, an integrated test plate 65 (composed of two test plates 65 bonded by the structural adhesive) is obtained. At this time, reset the rotating fixing seat part 5 by 180° to make the integrated test plate 65 return to the upper side of the partition plate 13. At this time, due to the curing of the structural adhesive, the integrated test plate 65 bonded together by the structural adhesive will still remain in a horizontal state. Then, control the motor of the drop hammer part 3 to run, make the reel rotate to wind up the pull rope, make the electric clamping part clamp the hammer part and move up to the required height, and then control the electric clamping part to release so that the hammer part falls freely and impacts the integrated test plate 65, so as to complete the impact test of the structural adhesive. Through the above operations, the drop hammer testing machine can set the structural adhesive on the plate that can be tested, and through the impact test of the plate, the strength test of the structural adhesive can be completed;When an impact test needs to be carried out on the structural adhesive at different angles, a set of side-mounted parts 62 of the positioning module 6 can first position the integrated test plate 65, and the rotation and fixation seat part 5 can drive the positioning module 6 to rotate. The operation is as follows: Pull the seat body 52 forward by the handle 54, thereby driving the shaft rod 51, the limit block 53, and the clamping block 58 to move forward. The forward movement of the limit block 53 causes the first spring 56 to contract, and the forward movement of the clamping block 58 will disengage from the engraved groove of the positioning disk 14. At this time, the seat body 52 can be rotated to the required angle in cooperation with the finger block 57 and the scale ring 15. After rotating to the required angle, release the handle 54. The expansion and reset of the first spring 56 can drive the limit block 53, the shaft rod 51, the seat body 52, and the clamping block 58 to move backward, so that the clamping block 58 is inserted into the corresponding engraved groove of the positioning disk 14, completing the positioning of the seat body 52 and the rotation of the rotation and fixation seat part 5. At this time, the rotation of the rotation and fixation seat part 5 can drive the integrated test plate 65 to tilt at an angle. At the same time, the impact point of the hammer part of the drop hammer part 3 can be adjusted according to the needs of the user, that is, controlling the telescopic movement of the electric cylinder 24 to drive the drop hammer part 3 to perform a lateral displacement guided by the track 23, completing the adjustment of the impact point of the hammer part of the drop hammer part 3. Through the above operations, the drop hammer testing machine can carry out impact tests on the structural adhesive at different angles and different points.

[0040] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drop weight testing machine for testing the strength of structural adhesives, comprising a main body (1) and a rotating and fixing seat (5), characterized in that: A load-bearing adjustment portion (2) is installed on the upper side of the main body (1), a drop weight portion (3) is installed on the upper side of the load-bearing adjustment portion (2), a control host (4) is installed on the right side of the load-bearing adjustment portion (2), the main body (1) comprises a box body (11), a door panel (12) is hingedly connected to the front side of the box body (11), partitions (13) are fixedly connected to both sides of the interior of the box body (11), the rotating seat portion (5) comprises a shaft rod (51) movably connected to a middle hole of the box body (11), a front end of the shaft rod (51) is fixedly connected to a seat body (52) located between a group of partitions (13), and a rear end of the shaft rod (51) is fixedly connected to the seat body (52) located between a group of partitions (13). The base body (52) is fixedly connected to a limit block (53), a handle (54) is fixedly connected in the front groove of the base body (52), a sink groove (55) is opened at the upper end surface of the base body (52), and a positioning module (6) is installed inside the sink groove (55), and the positioning module (6) comprises a bottom plate (61), a side mounting part (62), a limit part (63), a control frame (64) and a test plate (65), the bottom plate (61) is fixed on the inner side of the sink groove (55), and the upper end surface of the bottom plate (61) is fixedly connected to the side mounting part (62) on both sides, and the side mounting part (62) comprises a base plate (621), and the upper side opening of the base plate (621) is provided in the inner side of the sink groove (55). A rotating bar (622) is rotatably connected, a slot (624) is provided on the lower side of the rotating bar (622), an end of the rotating bar (622) away from the base plate (621) is fixedly connected to a mounting shell (623), a test plate (65) is installed on the inner side of the mounting shell (623), a track plate (625) is fixedly connected in the groove of the base plate (621), a group of two positioning rods (626) located on the lower side of the track plate (625) are fixedly connected in the groove of the base plate (621), the limiting part (63) is installed on the inner side of the side mounting part (62), and the limiting part (63) includes a track frame slidably connected to the track plate (625) (631), a guide rod (632) is fixedly connected to the lower end surface of the middle plate of the rail frame (631) and is slidably connected to the hole of the rail plate (625), a second spring (633) located on the upper side of the rail plate (625) is sleeved on the outer side of the guide rod (632), positioning slots (634) are provided at both ends of the lower part of the rail frame (631), an insert strip (635) inserted into the inner side of the slot (624) is fixedly connected to the upper side of the rail frame (631), a control frame (64) is fixedly connected between a group of the rail frames (631), and a heating dryer (7) located on the lower side of the rotating fixing seat (5) is installed on the inner side of the box body (11).

2. A drop weight testing machine for testing the strength of structural adhesive according to claim 1, characterized in that: The falling hammer part (3) is composed of a frame, a guide rod, a motor, a reel, a pull rope, an electric clamping part and a hammer. The lower plate of the frame of the falling hammer part (3) is provided with a through hole. The hammer of the falling hammer part (3) and the through hole are arranged to be aligned vertically. The control host (4) is electrically connected to the motor and the electric clamping part of the falling hammer part (3). The control host (4) is electrically connected to the heating dryer (7).

3. The drop weight testing machine for testing the strength of structural adhesive according to claim 1, characterized in that: The outer curved surface of the seat body (52) fits with the inner curved surface of the partition (13); the front end surface of the seat body (52) and the front end surface of the partition (13) are arranged in the same plane; the front end surface of the seat body (52) and the front end surface of the handle (54) are arranged in the same plane; and the rear end surface of the door panel (12) and the front end surface of the seat body (52) are arranged in the same plane.

4. The drop weight testing machine for testing the strength of structural adhesive according to claim 1, characterized in that: A gap is provided between a group of the test plates (65), the test plates (65) are all arranged horizontally, the test plates (65) and the bottom plate (61) are arranged vertically parallel, a gap is left between the test plates (65) and the bottom plate (61), a gap is left between the front end surface of the test plates (65) and the middle rod of the control frame (64), and the positioning module (6) will not interfere with the partition plate (13) when rotating with the rotating fixing seat (5).

5. The drop weight testing machine for testing the strength of structural adhesive according to claim 1, characterized in that: The rail frames (631) are all arranged on the inner side of the groove of the base plate (621), and the front and rear end surfaces of the rail frames (631) are in contact with the front and rear inner walls of the groove of the base plate (621). The positioning rods (626) are all arranged on the lower side of the positioning slots (634), and the positioning slots (634) are composed of a group of two circular slots, a lower corner slot, and a through slot that connects the circular slot and the corner slot.

6. The drop weight testing machine for testing the strength of structural adhesive according to claim 1, characterized in that: A first spring (56) is sleeved on the outer side of the shaft rod (51), and the first spring (56) is arranged between the front end surface of the limit block (53) and the rear end surface of the box body (11). A positioning plate (14) sleeved on the outer side of the shaft rod (51) is fixedly connected in the circular groove on the inner wall of the box body (11). A scale ring (15) is fixedly connected in the annular groove on the inner wall of the box body (11). Blocks (58) inserted into the grooves of the positioning plate (14) are fixedly connected in the grooves on both sides of the rear end surface of the seat body (52). A finger block (57) is fixedly connected to the centerline position of the upper end surface of the seat body (52), the load-bearing adjustment part (2) comprises a seat plate (21) fixed to the box body (11), a through opening (22) is opened in the upper plate body of the seat plate (21), rails (23) are fixedly connected to both sides of the upper part of the seat plate (21), the frame of the drop hammer part (3) is slidably connected to a group of rails (23), and an electric cylinder (24) whose output end is fixedly connected to the frame of the drop hammer part (3) is fixedly connected to the upper side of the seat plate (21).

7. A drop weight testing machine for testing the strength of structural adhesive according to claim 6, characterized in that: The electric cylinder (24), the heating dryer (7) and the control host (4) are electrically connected, the through opening (22) and the through hole of the falling hammer (3) are connected up and down, and the length of the through opening (22) is greater than the diameter of the through hole of the falling hammer (3).

8. The drop weight testing machine for testing the strength of structural adhesive according to claim 6, characterized in that: A group of thirty-six grooves arranged at equal angles are arranged on the inner side of the front end surface of the positioning plate (14), and a group of thirty-six marking lines arranged at equal angles are arranged on the front end surface of the scale ring (15). The grooves of the positioning plate (14) and the marking lines of the scale ring (15) are arranged to be aligned one by one inside and outside. The clamping block (58) is composed of a sector plate and a group of three convex strips arranged at equal angles.

Images