An irregular object welding surface welding strength testing device

Abstract

The application discloses a kind of irregular object welding surface welding strength testing device, including detection table, one side is fixed with L-shaped fixing frame;Simulation test component is installed on the upper end of the fixing frame;Positioning assembly is rotatably arranged on the detection table, and located below the simulation test component, the five-star foot to be tested is clamped on the positioning assembly;And protective cover, which is transparent material, is provided with two groups, the protective cover is slidably arranged on the upper end of the detection table, and is located on the two sides of the positioning assembly, and the opposite side end of each protective cover is provided with a clearance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding strength test, in particular to a welding strength test device for irregular object welding surface. BACKGROUND

[0002] With the development of society, the shape and function of the swivel chair are more and more, but only shape and function are not enough, must ensure that it has stable strength, the existing swivel chair leg is mostly five-star angle structure, which is composed of a fixed steel cylinder and five supporting legs welded on the outer peripheral side, the existing test device can only perform a simple impact strength test after the five-star leg is welded, and the test result has a large error due to the influence of welding deformation, in addition, due to its own structure, it is difficult to test the strength of a single supporting leg, which cannot meet the test requirements.

[0003] Therefore, it is necessary to provide a welding strength test device for irregular object welding surface to solve the problems mentioned in the background. SUMMARY

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a welding strength test device for irregular object welding surface, comprising:

[0005] A detection table is provided with an L-shaped fixing frame on one side;

[0006] A simulation test assembly is installed on the upper end of the fixing frame;

[0007] A positioning assembly is rotatably arranged on the detection table and located below the simulation test assembly, and the positioning assembly is clamped with a five-star leg to be tested; and

[0008] Two protective covers made of transparent material are provided, the protective covers are slidingly arranged on the upper end of the detection table and located on both sides of the positioning assembly, and an avoiding opening is formed on the upper end of the opposite side surface of each protective cover.

[0009] As a preferred technical scheme of the present application, the simulation test assembly comprises: a driving cylinder vertically arranged downward and slidingly arranged along the upper part of the fixing frame, a swelling sleeve slidingly arranged on the lower end of the driving cylinder along the axial direction, a plurality of clamping grooves uniformly formed on the lower end of the piston rod of the driving cylinder along the circumferential direction, a blocking ring arranged above the swelling sleeve at the piston rod, a horizontal driving mechanism fixed on the fixing frame on the side surface of the driving cylinder, and the horizontal driving mechanism can drive the driving cylinder to move forward and backward.

[0010] As a preferred technical scheme of the present application, an electromagnet is arranged in the clamping groove, a plurality of clamping blocks are arranged on the upper end of the swelling sleeve corresponding to the clamping groove, and a sliding rod is slidingly arranged on the middle part of the lower end of the piston rod.

[0011] As a preferred technical scheme of the present application, the positioning assembly comprises:

[0012] The shell is rotatably arranged at the upper end of the detection table, and a plurality of limiting grooves are uniformly arranged on the upper end and the side surface of the shell, the limiting grooves are arranged in correspondence with the five-star feet, and a sliding groove is arranged on the side wall of each limiting groove.

[0013] The driving shaft is coaxially fixed at the lower end of the shell and is driven by an external motor.

[0014] The support shaft is vertically arranged in each sliding groove, and a short shaft is rotatably arranged at the two ends of the support shaft, and the short shaft is slidably and rotatably arranged in the sliding groove.

[0015] As a preferred technical scheme of the present application, a hinge disc is fixed at the center of the bottom end of the shell, a plurality of telescopic rods are uniformly hinged on the outer circumferential side of the hinge disc in correspondence with the limiting grooves, the other end of each telescopic rod is hinged with the support shaft, and the telescopic rod is driven to move in the sliding groove.

[0016] As a preferred technical scheme of the present application, a limiting column is coaxially fixed at the upper end of the hinge disc, the limiting column is a telescopic structure, and the limiting column can support the end surface of the five-star foot.

[0017] As a preferred technical scheme of the present application, a torsional spring is arranged at the hinge between the telescopic rod and the support shaft, an arc-shaped groove is arranged on the upper part of the circumferential outer side of the support shaft, and the torsional spring can always keep the arc-shaped groove at the upper part of the support shaft when the support shaft slides.

[0018] As a preferred technical scheme of the present application, a pressure sensing unit is arranged in the arc-shaped groove.

[0019] As a preferred technical scheme of the present application, the driving cylinder is in the maximum contraction position in the initial state, the support shaft is located at the upper limit position of the sliding groove, and the angle between each telescopic rod and the sliding groove is greater than 90°.

[0020] Compared with the prior art, the present application provides an irregular object welding surface welding strength testing device, which has the following beneficial effects:

[0021] In the application, the five-star foot is clamped by the positioning assembly, and the strength of the welding surface of the five-star foot under various stress conditions is tested in cooperation with the simulation test assembly, which has the advantages of simple structure, convenient clamping, high testing efficiency, the deformation of each supporting leg of the five-star foot can be detected through the setting of the plurality of telescopic rods and the pressure sensing unit, and the stress can be adjusted, thereby reducing the influence of welding deformation on the test result, the clamping of the five-star foot and the test of the torsional resistance of the welding surface of the five-star foot are facilitated through the setting of the electromagnetic driving clamping structure at the expansion sleeve and the piston rod, so that the expansion sleeve can be rotated and limited or released, and the torsional resistance of the welding surface of the five-star foot is tested. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the welding strength testing device for the welding surface of an irregular object.

[0023] Figure 2 It is a schematic diagram of the positioning assembly structure of the welding strength testing device for the welding surface of an irregular object.

[0024] Figure 3 It is a schematic diagram of the expansion sleeve and drive cylinder structure of the welding strength testing device for the welding surface of an irregular object.

[0025] Figure 4 It is a schematic diagram of the five-star foot testing stress structure of the welding strength testing device for the welding surface of an irregular object.

[0026] Figure 5 It is Figure 1 a five-star foot;

[0027] In the figure: 1, detection table; 2, fixed frame; 3, simulation test assembly; 31, drive cylinder; 32, expansion sleeve; 33, horizontal drive mechanism; 34, retaining ring; 4, positioning assembly; 41, housing; 42, limiting groove; 43, sliding groove; 44, drive shaft; 45, support shaft; 46, short shaft; 47, articulated disc; 48, telescopic rod; 49, limiting column; 311, clamping groove; 312, electromagnet; 313, sliding rod; 321, clamping block; 451, arc-shaped groove; 5, protective cover; 51, avoiding opening; 6, five-star foot. DETAILED DESCRIPTION

[0028] Please refer to Figures 1-5 , the application provides a welding strength testing device for the welding surface of an irregular object, which comprises:

[0029] The detection table 1 is fixed with an L-shaped fixed frame 2 on one side;

[0030] The simulation test assembly 3 is installed on the upper end of the fixed frame 2;

[0031] A positioning assembly 4 is rotatably arranged on the detection table 1 below the simulation test assembly 3, and clamps the five-star foot 6 to be tested on the positioning assembly 4; and

[0032] Two protective covers 5 are made of transparent material and are arranged on the upper end of the detection table 1 and located on both sides of the positioning assembly 4, and each of the protective covers 5 is provided with an avoiding opening 51 on the upper end of the opposite side surface.

[0033] It should be explained that during the test, the five-star foot 6 to be tested is limited by the positioning assembly 4, and then the two protective covers 5 are moved to cover the positioning assembly 4 and the five-star foot 6 inside to protect the operator, and then the stress state of the five-star foot 6 in the use scene is simulated by the simulation test assembly 3, and the welding surface strength of the five-star foot 6 is tested.

[0034] In this embodiment, the simulation test assembly 3 comprises a driving cylinder 31 which is arranged vertically downward and slidably on the upper portion of the fixed frame 2, a plurality of clamping grooves 311 are uniformly arranged on the lower end of the piston rod of the driving cylinder 31 in the circumferential direction, a stop ring 34 is arranged above the piston rod of the driving cylinder 31, a horizontal driving mechanism 33 is arranged on the fixed frame 2 and can drive the driving cylinder 31 to move forward and backward.

[0035] It should be explained that during the simulation test of the five-star foot 6, since the five-star foot 6 is usually installed at the lower end of a swivel chair, and during use, the pressure and impact force from vertically downward or obliquely downward (the user leans on the swivel chair) will affect the welding surface of the five-star foot 6, therefore, targeted test is carried out, the vertical downward pressure and impact force are simulated by the driving cylinder 31, and in addition, after the driving cylinder 31 is clamped into the five-star foot 6, the horizontal driving mechanism 33 is started to push the driving cylinder 31 to simulate the oblique downward pressure.

[0036] In this embodiment, an electromagnet 312 is arranged in the clamping groove 311, a plurality of clamping blocks 321 are arranged on the upper end of the expansion sleeve 32 corresponding to the clamping groove 311, and a sliding rod 313 is slidably arranged on the middle portion of the lower end of the piston rod.

[0037] That is, the expansion sleeve 32 is adsorbed by controlling the power supply of the electromagnet 312 to limit the rotation and release the limitation, when the five-star foot 6 is installed, the electromagnet 312 is powered off, the expansion sleeve 32 is expanded to the five-star foot 6 in a rotatable state, and the five-star foot 6 is conveniently moved downward into the positioning assembly 4 by the driving cylinder 31.

[0038] In this embodiment, the positioning assembly 4 comprises:

[0039] The shell 41 is rotationally arranged on the upper end of the detection table 1, and a plurality of limiting grooves 42 are uniformly arranged on the upper end and the side surface of the shell 41. The limiting grooves 42 are arranged in correspondence with the five-star feet 6, and a sliding groove 43 is obliquely arranged on the two side walls of the limiting groove 42.

[0040] A driving shaft 44 is coaxially fixed to the lower end of the shell 41 and is driven by an external motor.

[0041] A support shaft 45 is vertically arranged in each sliding groove 43, and a short shaft 46 is rotationally arranged at the two ends of the support shaft 45. The short shaft 46 is slidingly and rotationally arranged in the sliding groove 43. The support shaft 45 and the limiting groove 42 support and limit each support leg of the five-star foot 6.

[0042] In this embodiment, a hinge disc 47 is fixedly arranged at the center of the inner bottom end of the shell 41. A plurality of telescopic rods 48 are uniformly hingedly arranged on the outer circumferential side of the hinge disc 47 in correspondence with the limiting grooves 42. The other end of each telescopic rod 48 is hingedly connected to the support shaft 45. The telescopic rod 48 drives the support shaft 45 to move in the sliding groove 43 through telescopic driving.

[0043] That is, the telescopic rod 48 controls the movement of the support shaft 45 in the sliding groove 43 to support different positions of the lower end of the five-star foot 6. The telescopic rod 48 can be synchronously driven or independently driven.

[0044] When the five-star foot 6 is subjected to vertical downward force simulation test, the telescopic rod 48 remains stationary, and the driving cylinder 31 is controlled to perform one-time impact or multiple impact test. When the driving cylinder 31 is continuously pressed downward until the welding surface is broken, the welding surface breaking limit of the five-star foot 6 is tested. When the five-star foot 6 is subjected to multiple reciprocating impacts, the impact force is less than the limit pressure (the size of the impact force corresponds to the body weight of the user), and the welding surface fatigue damage degree and service life are tested.

[0045] When the five-star foot 6 is subjected to inclined downward force simulation test, the telescopic rod 48 remains stationary, the expansion sleeve 32 at the end of the driving cylinder 31 is clamped into the five-star foot 6, and then the horizontal driving mechanism 33 is started to push the driving cylinder 31 to simulate the inclined downward pressure. One-time impact or multiple impact test is performed to test the welding surface breaking limit or fatigue damage degree.

[0046] In this embodiment, a limiting column 49 is coaxially fixed to the upper end of the hinge disc 47. The limiting column 49 is a telescopic structure, and can support the end surface of the five-star foot 6.

[0047] It needs to be explained that in the initial state, the limiting column 49 is lifted, the lower end of the five-star foot 6 is placed on it to horizontally support the five-star foot 6, and then the expansion sleeve 32 is moved into the five-star foot 6 to expand and limit, after the limiting is completed, the limiting column 49 is retracted to the lower limit position.

[0048] In the embodiment, a torsional spring is arranged at the hinge of the telescopic rod 48 and the support shaft 45, an arc-shaped groove 451 is arranged on the upper lateral part of the support shaft 45, and the torsional spring can always keep the arc-shaped groove 451 at the upper part of the support shaft 45 when the support shaft 45 slides, which facilitates the limiting of the bottom of the five-star foot 6.

[0049] In the embodiment, a pressure sensing unit is arranged in the arc-shaped groove 451.

[0050] The arrangement of the pressure sensing unit can detect the pressure of each support foot, avoid uneven force of each support foot due to welding deformation, and affect the accuracy of the test.

[0051] Specifically, the steel cylinder part of the five-star foot 6 is expanded and limited by the expansion sleeve 32, and the upper end of the steel cylinder is completely attached to the piston rod end face of the driving cylinder 31, then the driving cylinder 31 drives the five-star foot 6 to move downward, and the five-star foot 6 is placed in the limiting groove 42 by rotating the five-star foot 6, and stops moving downward when the five-star foot 6 contacts the support shaft 45, and then the values of each pressure sensing unit are observed, if the values are consistent, it indicates that the welding is normal and will not affect the accuracy of the test results, otherwise, it proves that the welding has deformation, and the telescopic length of each telescopic rod 48 needs to be adjusted adaptively to make the pressure values of each pressure sensing unit consistent (the pressure of the five-star foot 6 in the pressed state is the same on each support shaft 45), and reduce the influence of welding deformation on the welding surface strength test.

[0052] At the same time, when each telescopic rod 48 is adjusted, the five-star foot 6 is in a completely limited state, one telescopic rod 48 is controlled to extend, and the welding surface strength of a single support foot is tested, in addition, the support position of the telescopic rod 48 is adjusted, so that the side surface of the five-star foot 6 is attached and limited by the side surface 42 of the limiting groove, and the electromagnet 312 is energized to make the expansion sleeve 32 in a non-rotatable state, and then the external motor is controlled to rotate to test the torsional resistance of the welding surface of each support foot.

[0053] In the embodiment, the driving cylinder 31 is in the maximum retracted position in the initial state, the support shaft 45 is located at the upper limit position of the sliding groove 43, and the angle between each telescopic rod 48 and the sliding groove 43 is greater than 90°, which avoids the support shaft 45 from being stuck during adjustment.

[0054] In specific implementation, the five-star foot to be tested is placed on the raised limiting column, then the simulation test assembly is controlled to expand and limit the five-star foot, and the five-star foot is controlled to move downward to the positioning assembly, the five-star foot is supported and limited by the telescopic rod and the supporting shaft, and then the welding surface strength of the five-star foot is tested.

[0055] The above merely provides the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, within the technical range disclosed by the present application, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change, should be covered within the protection scope of the present application.

Claims

1. A device for testing the welding strength of irregular object welding surfaces, characterized in that: The utility model relates to a five-star foot simulation test device, including: The detection platform (1) one side is fixed with the L-shaped fixing frame (2); The simulation test component (3) is installed on the upper end of the fixing frame (2); The positioning assembly (4) is rotationally arranged on the detection platform (1) and located below the simulation test component (3), and the five-star foot (6) to be tested is clamped on the positioning assembly (4); The protective cover (5) is provided with two groups of transparent materials, the protective cover (5) is slidingly arranged on the upper end of the detection platform (1) and located on both sides of the positioning assembly (4), and the protective cover (5) is provided with an avoiding opening (51) on the opposite side of the upper end of each protective cover (5); The simulation test component (3) includes: a driving cylinder (31) vertically downwardly arranged and slidingly arranged along the upper part of the fixing frame (2), a swelling sleeve (32) slidingly arranged on the lower end of the driving cylinder (31) along the axial direction, a plurality of clamping grooves (311) uniformly arranged on the lower end of the piston rod of the driving cylinder (31) along the circumferential direction, a stop ring (34) arranged above the swelling sleeve (32) at the piston rod, a horizontal drive mechanism (33) fixed on the fixing frame (2) on the side of the driving cylinder (31), and the horizontal drive mechanism (33) can drive the driving cylinder (31) to move forward and backward; The clamping groove (311) is provided with an electromagnet (312), and a plurality of clamping blocks (321) are arranged on the upper end of the swelling sleeve (32) corresponding to the clamping groove (311); a sliding rod (313) is slidingly arranged on the lower end of the piston rod; The positioning assembly (4) includes: The shell (41) is rotationally arranged on the upper end of the detection platform (1), a plurality of limiting grooves (42) are uniformly arranged on the upper end and the side of the shell (41), the limiting grooves (42) are arranged corresponding to the five-star foot (6), and a sliding groove (43) is obliquely arranged on the two side walls of the limiting groove (42); The driving shaft (44) coaxially fixes the lower end of the shell (41) and is driven by an external motor; The support shaft (45) is vertically arranged in each sliding groove (43), short shafts (46) are rotationally arranged on both ends of the support shaft (45), and the short shafts (46) are slidingly and rotationally arranged in the sliding grooves (43); The hinge disc (47) is fixed at the center position of the inner bottom end of the shell (41), a plurality of telescopic rods (48) are uniformly hinged on the outer circumferential side of the hinge disc (47) corresponding to the limiting grooves (42), and the other end of each telescopic rod (48) is hinged with the support shaft (45), so that the support shaft (45) is driven to move in the sliding groove (43) through the telescopic driving of the telescopic rod (48).

2. An apparatus for testing the weld strength of a weld surface of an irregular object as defined in claim 1, wherein: The limiting column (49) is coaxially fixed on the upper end of the hinge disc (47), the limiting column (49) is a telescopic structure, and the limiting column (49) can support the end face of the five-star foot (6).

3. An apparatus for testing the weld strength of a weld surface of an irregular object as defined in claim 2, wherein: A torsion spring is arranged at the hinge between the telescopic rod (48) and the support shaft (45), an arc-shaped slot (451) is arranged on the upper lateral part of the support shaft (45), and the torsion spring can keep the arc-shaped slot (451) on the upper part of the support shaft (45) when the support shaft (45) slides.

4. A device for testing the weld strength of a weld surface of an irregular object according to claim 3, wherein: A pressure sensing unit is arranged in the arc-shaped slot (451).

5. An apparatus for testing the weld strength of a weld surface of an irregular object as defined in claim 4, wherein: The driving cylinder (31) is in the maximum contraction position in the initial state, the support shaft (45) is located at the upper limit position of the sliding groove (43), and the angle between each telescopic rod (48) and the sliding groove (43) is greater than 90°.

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