A steel bar self-positioning tooling for welding a wire rack of a household appliance

Abstract

The present invention relates to a steel bar self-positioning tooling for welding a wire rack of a household appliance, which comprises a material frame and a vibration motor, and a positioning chuck is placed in the material frame. The positioning chuck of the present invention can automatically adsorb the steel bars in the material frame and fix them at the positions where all the steel bars are to be welded, positioning all the steel bars at one time, improving the positioning efficiency, and the positioning operation is off-line operation, separated from the welding operation, and will not affect the welding operation, facilitating the operator to directly perform the next welding.

Description

Technical Field

[0001] The present invention belongs to the technical field of welding positioning, and specifically refers to a steel bar self-positioning tooling for welding the grid of household appliances. Background Art

[0002] Household appliances, such as microwave ovens, toasters, etc., need to be provided with a grid inside for layering needs. The grid is mostly welded by steel bars distributed crosswise. During welding, it is necessary to uniformly position more than a dozen steel bars longitudinally for preliminary welding positioning, and then uniformly position more than a dozen steel bars transversely for welding combination.

[0003] In order to improve the welding efficiency, the design idea of the common welding tooling is how to position each steel bar one by one and then perform welding. This kind of welding positioning method takes a long time to position the steel bars, and still needs to be positioned one by one before welding. When positioning the steel bars, the operator cannot carry out the welding work, and the two cannot be carried out simultaneously. Summary of the Invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a steel bar self-positioning tooling for welding the grid of household appliances, which at least partially solves the above problems.

[0005] The technical solution adopted by the present invention is as follows: A steel bar self-positioning tooling for welding the grid of household appliances proposed by the present invention includes a material frame and a vibration motor. The vibration motor is arranged on the side wall of the material frame. Vibration springs are arranged in an array below the material frame. When the vibration motor works, it drives the material frame to vibrate at a high frequency. The steel bars are placed in the material frame, and the vibration of the material frame will make the steel bars evenly distributed;

[0006] Furthermore, a positioning chuck is placed in the material frame. The positioning chuck is placed above the steel bars. When the material frame vibrates, the steel bars will be adsorbed and fixed by the positioning chuck, and the spacing and quantity of the steel bars are preset by the positioning chuck. The positioning chuck can be taken out of the material frame and then installed on the welding operation platform. The positioning of the positioning chuck can be completed through two positioning points on the operation platform, thereby positioning all the steel bars.

[0007] Furthermore, the positioning chuck includes a fixing plate. During operation, the fixing plate is placed above the steel bars in the material frame, and a central frame that can slide up and down is arranged in the middle of the fixing plate.

[0008] Furthermore, sleeves are linearly arranged in the central frame along the horizontal direction, and magnets are arranged in the sleeves. The spacing between adjacent magnets is equal.

[0009] Furthermore, positioning blocks are symmetrically arranged on the lower wall of the fixing plate in an array. The positioning blocks are adapted to the positions of the sleeves and the magnets;

[0010] Further, an auxiliary groove is provided at the lower end of the fixed block. The auxiliary groove is preferably arc-shaped, and the height of the top end of the auxiliary groove is adapted to the height of the bottom end of the magnet.

[0011] Further, in order to release the adsorbed steel bar and separate the steel bar from the magnet, a handle is provided on the fixed plate, and a pull handle is provided on the central frame.

[0012] Further, in order to enable the magnet to automatically return to the initial state, guide columns are symmetrically provided on both sides of the fixed plate. A sliding sleeve is slidably provided on the guide column through a connecting plate. A first spring is connected between the sliding sleeve and the guide column, and the central frame is fixed to the connecting plate.

[0013] Further, in order to facilitate the adjustment of the welding spacing of the steel bars and enable the spacing of the magnets to be adjusted as required, so as to be applicable to different models of products, a second spring is connected between the sleeves. A transition rod is fixed on the side wall of the outermost sleeve. An adjusting rod is rotatably provided on the transition rod, and the adjusting rod is rotationally threaded on the side wall of the central frame;

[0014] Further, when changing the spacing of the magnets, in order to synchronously adjust the position of the positioning block, a connecting rod is provided at the edge of the upper wall of the sleeve, and a lifting rod is provided on the positioning block. The end of the connecting rod slides on the lifting rod.

[0015] Further, when the middle part area of the grid does not need to be arranged with steel bars, in order to prevent the steel bars from being adsorbed on the middle magnet, the magnet is slidably arranged in the sleeve through a lifting block. A wedge block is provided on the side wall of the lifting block, and the wedge block cooperates with the sleeve. The left and right movement of the wedge block can adjust the height of the lifting block, thereby changing the height of the magnet;

[0016] Further, in order to fix the lifting block at the corresponding height, positioning holes are provided on the sleeve in a left-right distribution. A pull rod penetrates through the wedge block. A third spring is provided between the pull rod and the wedge block, and the bottom of the pull rod is fitted with the positioning hole.

[0017] The beneficial effects achieved by the present invention with the above structure are as follows: The magnets on the positioning chuck can automatically adsorb the steel bars in the material frame, and then fix all the steel bars at the welding position through the positioning blocks, realizing the one-time positioning of all the steel bars, improving the positioning efficiency, and the positioning operation is off-line operation, separated from the welding operation, which will not affect the welding operation and is convenient for the operator to directly perform the next welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present invention;

[0019] Figure 2 It is a schematic structural diagram of the positioning chuck in Embodiment 1 of the present invention;

[0020] Figure 3 is Figure 2 the exploded view of;

[0021] Figure 4 is Figure 2 the sectional view of;

[0022] Figure 5 is the structural schematic diagram of the positioning chuck in the second embodiment of the present invention;

[0023] Figure 6 is Figure 5 the exploded view of;

[0024] Figure 7 is the schematic diagram of the connection relationship of each sleeve in the second embodiment of the present invention;

[0025] Figure 8 is the schematic diagram of the positional relationship between the lifting block and the wedge block;

[0026] Figure 9 is the structural schematic diagram of the sleeve.

[0027] Wherein, 1, material frame, 2, vibration motor, 3, positioning chuck, 4, fixing plate, 5, guiding column, 6, connecting plate, 7, sliding sleeve, 8, first spring, 9, central frame, 10, sleeve, 11, magnet, 12, positioning block, 13, grip, 14, pull handle, 15, auxiliary groove, 16, lifting rod, 17, connecting rod, 18, lifting block, 19, wedge block, 20, second spring, 21, transition rod, 22, distance adjusting rod, 23, pull rod, 24, third spring, 25, positioning hole.

[0028] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. Specific Embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0031] As Figure 1 shown, a self-positioning tooling for steel bars used in the welding of a household appliance wire frame proposed by the present invention includes a material frame 1 and a vibration motor 2. The vibration motor 2 is arranged on the side wall of the material frame 1. Vibration springs are arranged in an array below the material frame 1. When the vibration motor 2 works, it drives the material frame 1 to vibrate at a high frequency. The steel bars are placed in the material frame 1, so that the vibration of the material frame 1 will make the steel bars evenly distributed.

[0032] A positioning chuck 3 is placed in the material frame 1. The positioning chuck 3 is placed above the steel bars. When the material frame 1 vibrates, the steel bars will be adsorbed and fixed by the positioning chuck 3. Moreover, the spacing and quantity of the steel bars are preset by the positioning chuck 3. The positioning chuck 3 can be taken out of the material frame 1 and then installed on the welding operation platform. The positioning of the positioning chuck 3 can be completed through two positioning points on the operation platform, thereby positioning all the steel bars. During the welding operation, the operator does not need to spend a large amount of extra time on positioning work, and can complete the automatic positioning of the steel bars outside the line, thereby improving the efficiency of the welding operation.

[0033] As Figures 2 - 4 shown, the positioning chuck 3 includes a fixing plate 4. During operation, the fixing plate 4 is placed above the steel bars in the material frame 1, and a central frame 9 capable of sliding up and down is provided in the middle of the fixing plate 4.

[0034] A linear array of sleeves 10 is provided horizontally along the inside of the central frame 9. Magnets 11 are arranged in the sleeves 10. The spacing between adjacent magnets 11 is equal. When the material frame 1 vibrates, the magnets 11 will adsorb the nearest steel bars. After the adsorbed steel bars are adapted to the positions of the magnets 11 in the horizontal direction, the positions of the magnets 11 are preset, so that each steel bar is positioned to the set position.

[0035] Positioning blocks 12 are symmetrically arranged on the lower wall of the fixing plate 4 in an array. The positioning blocks 12 are adapted to the positions of the sleeves 10 and the magnets 11. After the steel bars are adsorbed by the magnets 11, the positioning blocks 12 play an auxiliary positioning role, and after the magnets 11 are separated from the steel bars subsequently, the positioning blocks 12 can fix the steel bars and prevent them from shifting left and right.

[0036] The lower end of the fixed block is provided with an auxiliary groove 15. The auxiliary groove 15 is preferably arc-shaped, and the top height of the auxiliary groove 15 is adapted to the bottom height of the magnet 11, so that when the steel bar is adsorbed on the magnet 11, it is also limited by the auxiliary groove 15 at the same time, preventing the two from interfering with each other when positioning the steel bar.

[0037] To release the adsorbed steel bar and separate the steel bar from the magnet 11, a grip 13 is provided on the fixed plate 4, and a pull handle 14 is provided on the central frame 9. Hold the grip 13 with the palm of the hand and hook the pull handle 14 with the fingers, and pull up the pull handle 14 upward, so as to pull up the central frame 9 from the fixed plate 4. The magnet 11 moves upward, and the steel bar is restricted by the positioning block 12 and cannot move upward accordingly. The steel bar will separate from the magnet 11. At this time, the magnetic force received by the steel bar can no longer overcome the gravity of the steel bar, and the steel bar will fall automatically.

[0038] To enable the magnet 11 to automatically reset to its initial state, guide posts 5 are symmetrically provided on both sides of the fixed plate 4. A sliding sleeve 7 is slidably provided on the guide posts 5 through a connecting plate 6. A first spring 8 is connected between the sliding sleeve 7 and the guide posts 5. The central frame 9 is fixed to the connecting plate 6.

[0039] In some embodiments, the steel bars are placed in the material frame 1, and at the same time, the positioning chuck 3 is placed entirely on the steel bars. Start the vibration motor 2, and the vibration motor 2 drives the material frame 1 to vibrate at a high frequency, so that the steel bars in the material frame 1 move horizontally back and forth relative to the positioning chuck 3. When the steel bars vibrate at a high frequency, the steel bars will be evenly distributed and there will be no local bulge phenomenon, which is convenient for the positioning chuck 3 to adsorb the steel bars.

[0040] The steel bars vibrate back and forth. When the steel bars move below the magnet 11, the steel bar closest to the magnet 11 will be quickly adsorbed under the action of the magnetic force. The two ends of the steel bar are simultaneously limited by the auxiliary groove 15 under the positioning block 12. There will be a steel bar under each magnet 11, thus completing the preliminary positioning of the steel bars to be welded.

[0041] After positioning the steel bars, the worker holds the grip 13 and takes out the positioning chuck 3 from the material frame 1. The steel bars under the positioning chuck 3 are also taken out at the same time. Then, the positioning chuck 3 is installed on the fixture to be welded. At this time, only by aligning the positioning chuck 3 with two positioning points on the horizontal plane, the positioning work of all the steel bars can be completed, without positioning each steel bar one by one.

[0042] After the steel bars are positioned, pull up the pull handle 14 with the fingers. The pull handle 14 drives the central frame 9 to move upward. The sleeve 10 in the central frame 9 moves upward synchronously and drives the magnet 11 to move upward. After the magnet 11 moves upward, the steel bar is restricted by the positioning hole 25 and cannot move accordingly. When it moves a certain distance, the magnetic force cannot overcome the gravity of the steel bar, and the steel bar will fall automatically. At this time, the positioning chuck 3 is taken out as a whole, and the steel bar is separated from the positioning chuck 3. All the steel bars are completely positioned at the welding points to be welded and waiting for welding.

[0043] After the pull handle 14 is released, the first spring 8 presses the connecting plate 6 and the sliding sleeve 7 downward. The connecting plate 6 moves downward and drives the central frame 9 to move downward, so that the central frame 9 returns to its initial state.

[0044] Then, the positioning chuck 3 is repositioned on the steel bar in the material frame 1. The vibration motor 2 continues to vibrate. The operator performs welding operations on the previously positioned steel bars, while the positioning chuck 3 simultaneously performs positioning of the next batch of steel bars. The two operations are carried out simultaneously without interference.

[0045] As Figures 5 - 7 shown, in order to facilitate adjustment of the welding spacing of the steel bars and enable the spacing of the magnets 11 to be adjusted as needed, so as to be applicable to different models of products, a second spring 20 is connected between the sleeves 10. All the second springs 20 are connected through the sleeves 10 in a series form. When any one of the sleeves 10 is displaced under pressure, all the second springs 20 receive the same pressure and produce the same amount of deformation, so that the spacing between all adjacent sleeves 10 is exactly the same. A transition rod 21 is fixed on the side wall of the outermost sleeve 10. A distance-adjusting rod 22 is rotatably provided on the transition rod 21. The distance-adjusting rod 22 is threadedly rotated on the side wall of the central frame 9. When the distance-adjusting rod 22 is rotated, the distance-adjusting rod 22 and the transition rod 21 press the sleeve 10, and the sleeve 10 is displaced and compresses the second spring 20. The pressure and the amount of deformation will be synchronously transmitted to other second springs 20, so that the spacing between adjacent sleeve heads 10 changes synchronously and remains the same;

[0046] When changing the spacing of the magnets 11, in order to synchronously adjust the position of the positioning block 12, a connecting rod 17 is provided at the edge of the upper wall of the sleeve 10, and a lifting rod 16 is provided on the positioning block 12. The end of the connecting rod 17 slides on the lifting rod 16. When the sleeve 10 is displaced, it will synchronously drive the connecting rod 17 to move. The connecting rod 17 synchronously drives the positioning block 12 to move through the lifting rod 16. When the connecting rod 17 follows the lifting and lowering of the sleeve 10, it also slides up and down along the lifting rod 16 without being obstructed by the lifting rod 16.

[0047] In some embodiments, when different models of products need to be produced, first adjust the spacing of the sleeves 10 according to the spacing of the steel bars on the grid to be welded: rotate the distance-adjusting rod 22, and the distance-adjusting rod 22 presses the sleeve 10 through the transition rod 21. The sleeve 10 compresses the second spring 20, and the second spring 20 sequentially transmits the pressure to the remaining second springs 20, so that all the second springs 20 have the same amount of deformation, and finally the spacing between all adjacent sleeves 10 is the same.

[0048] After the spacing between the sleeves 10 is adjusted, the connecting rod 17 also drives the positioning block 12 to complete the adjustment through the action of the lifting rod 16, so that all the positioning blocks 12 are adapted to the sleeves 10.

[0049] During subsequent positioning operations, repeat the operation steps of the first embodiment and simply pull up the handle.

[0050] As Figures 7 - 9 shown, when steel bars do not need to be arranged in the middle part area of the grid frame, in order to prevent the steel bars from being adsorbed on the middle magnet 11, the magnet 11 is slidably arranged in the sleeve 10 through the lifting block 18. A wedge block 19 is provided on the side wall of the lifting block 18, and the wedge block 19 cooperates with the sleeve 10. The left and right movement of the wedge block 19 can adjust the height of the lifting block 18, thereby changing the height of the magnet 11.

[0051] In order to fix the lifting block 18 at the corresponding height, positioning holes 25 are provided on the sleeve 10 and distributed left and right. A pull rod 23 is penetrated through the wedge block 19. A third spring 24 is provided between the pull rod 23 and the wedge block 19. The bottom of the pull rod 23 is fitted with the positioning hole 25. When the pull rod 23 is pulled up, the pull rod 23 compresses the third spring 24 and disengages from the positioning hole 25. After the wedge block 19 moves left and right to the positioning hole 25 at the limited position, the pull rod 23 is released. The pull rod 23 is re-embedded in the current positioning hole 25 under the action of the third spring 24 and fixed, so that the height of the lifting block 18 is fixed. At this time, the magnet 11 shrinks upward and will no longer adsorb the steel bars below. In some embodiments, the magnet 11 corresponding to the area where steel bars do not need to be provided is moved upward, so as to reduce the influence of the magnetic force on the steel bars, and this area can be automatically vacated when the steel bars are adsorbed.

[0052] During specific operation, pull out the pull rod 23 upward. The pull rod 23 moves upward against the resistance of the third spring 24, and the bottom of the pull rod 23 disengages from a positioning hole 25 on the sleeve 10. Then push the wedge block 19, and the wedge block 19 moves the lifting block 18 upward. The lifting block 18 drives the magnet 11 at the bottom upward.

[0053] Then release the pull rod 23. The pull rod 23 moves downward under the pulling force of the third spring 24 and is embedded in another positioning hole 25, so that the height of the lifting block 18 is fixed. The distance between the magnet 11 and the steel bars in the material frame 1 here is relatively large, and the magnetic force cannot overcome the gravity of the steel bars to suck the steel bars, thus completing the adjustment of the distribution of the steel bars.

[0054] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to this process, method, article or device.

[0055] The above describes the present invention and its embodiments. Such description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the present invention, design similar structural modes and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. A self-positioning tool for welding steel bars for household appliance grids, comprising a material frame (1) and a vibration motor (2), wherein the vibration motor (2) is arranged on a side wall of the material frame (1), and is characterized in that: Also includes: A positioning chuck (3) comprising a fixing plate (4), wherein the fixing plate (4) is placed on the steel bar when in use; A central frame (9) is slidably disposed in the middle of the fixed plate (4); Magnets (11), multiple groups of which are arranged at intervals in the central frame (9) for adsorbing the steel bars; Positioning blocks (12) are symmetrically arranged on the lower wall of the fixed plate (4); a plurality of positioning blocks (12) are provided, and gaps are provided between adjacent positioning blocks (12); the positioning blocks (12) are used to assist in positioning the steel bars adsorbed by the magnets; and the positions of the positioning blocks (12) and the magnets (11) are adapted; Sleeves (10) are arranged in a linear array in a horizontal direction in the central frame (9), the magnets (11) are arranged in the sleeves (10), and the positioning blocks (12) are adapted to the positions of the sleeves (10); Guide columns (5) are symmetrically arranged on both sides of the fixing plate (4); a sliding sleeve (7) is slidably arranged on the guide column (5) through a connecting plate (6); a first spring (8) is connected between the sliding sleeve (7) and the guide column (5); the central frame (9) is fixed on the connecting plate (6); a grip (13) is arranged on the fixing plate (4); and a pull handle (14) is arranged on the central frame (9); An auxiliary groove (15) is provided at the lower end of the positioning block (12), and the height of the top end of the auxiliary groove (15) is adapted to the height of the bottom end of the magnet (11); A second spring (20) is connected between the sleeves (10); A transition rod (21) is fixed on the side wall of the outermost sleeve (10), and a distance adjusting rod (22) is rotatably provided on the transition rod (21), and the distance adjusting rod (22) is threadedly rotated on the side wall of the central frame (9); A connecting rod (17) is provided on the edge of the upper wall of the sleeve (10), a lifting rod (16) is provided on the positioning block (12), and an end of the connecting rod (17) slides on the lifting rod (16); The magnet (11) is slidably disposed in the sleeve (10) via a lifting block (18); a wedge block (19) is disposed on a side wall of the lifting block (18); and the wedge block (19) is used to adjust the height of the lifting block (18).

2. The self-positioning tool for steel bars used for welding the grid of household appliances according to claim 1, characterized in that: A pull rod (23) is provided through the wedge block (19), and a third spring (24) is provided between the pull rod (23) and the wedge block (19).

3. The self-positioning tool for steel bars used for welding the grid frame of household appliances according to claim 2, characterized in that: The sleeve (10) is provided with positioning holes (25) distributed on the left and right, and used to define the position of the pull rod (23).

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