Steel bar self-positioning tool for household appliance net rack welding

Abstract

The steel bar self-positioning tool for household appliance net rack welding comprises a material frame and a vibration motor, and a positioning chuck is placed in the material frame. According to the positioning chuck, the steel bars in the material frame can be automatically adsorbed and fixed to the to-be-welded positions of all the steel bars, all the steel bars are positioned at a time, the positioning efficiency is improved, the positioning operation is off-line operation and is separated from welding operation, the welding operation cannot be affected, and an operator can directly conduct next-time welding conveniently.

Description

Technical Field

[0001] The invention belongs to the technical field of welding positioning, and in particular relates to a steel bar self-positioning tool for welding a household appliance grid. Background Art

[0002] Household appliances, such as microwave ovens and bread machines, need to be equipped with a grid inside for layering. The grid is mostly welded by cross-distributed steel bars. When welding, it is necessary to evenly position more than a dozen steel bars in the longitudinal direction for preliminary welding positioning, and then evenly position more than a dozen steel bars in the transverse direction for welding combination.

[0003] In order to improve welding efficiency, the design idea of ​​common welding tooling is how to position each steel bar one by one before welding. This 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 perform welding work, and the two cannot be performed at the same time. 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 self-positioning tool for steel bars used for welding a household appliance grid, which at least partially solves the above problem.

[0005] The technical solution adopted by the present invention is as follows: the present invention proposes a steel bar self-positioning tool for welding a household appliance grid, comprising a material frame and a vibration motor, wherein the vibration motor is arranged on the side wall of the material frame, and vibration springs are arranged in an array below the material frame. The vibration motor drives the material frame to vibrate at a high frequency when it works, and the steel bars are placed in the material frame. The vibration of the material frame will make the steel bars evenly distributed; Furthermore, a positioning chuck is placed in the material frame, and 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 number of the steel bars are pre-set by the positioning chuck. The positioning chuck can be taken out of the material frame and then installed on the welding work platform. The positioning of the positioning chuck can be completed through two positioning points on the work platform, thereby positioning all the steel bars.

[0006] Furthermore, the positioning chuck includes a fixing plate. During operation, the fixing plate is placed above the steel bar in the material frame. A central frame capable of sliding up and down is provided in the middle of the fixing plate.

[0007] Furthermore, sleeves are arranged in a linear array along the horizontal direction in the central frame, magnets are arranged in the sleeves, and the intervals between adjacent magnets are equal.

[0008] Furthermore, the lower wall of the fixing plate is symmetrically provided with positioning blocks distributed in an array, and the positioning blocks are adapted to the positions of the sleeve and the magnet; Furthermore, an auxiliary groove is provided at the lower end of the fixing block, the auxiliary groove is preferably arc-shaped, and the top height of the auxiliary groove is adapted to the bottom height of the magnet.

[0009] Furthermore, in order to release the adsorbed steel bar and separate the steel bar from the magnet, a handle is provided on the fixing plate and a pull handle is provided on the central frame.

[0010] Furthermore, in order to enable the magnet to automatically reset to its 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 the 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.

[0011] Furthermore, in order to facilitate the adjustment of the welding spacing of the steel bars, so that the spacing of the magnets can be adjusted as needed, so as to be suitable for products of different models, a second spring is connected between the sleeves, a transition rod is fixed on the outermost side wall of the sleeve, and a pitch adjusting rod is rotatably provided on the transition rod, and the pitch adjusting rod is threadedly rotated on the side wall of the central frame; Furthermore, when the spacing between the magnets is changed, in order to synchronously adjust the position of the positioning block, a connecting rod is provided on the edge of the upper wall of the sleeve, and a lifting rod is provided on the positioning block, and the end of the connecting rod slides on the lifting rod.

[0012] Furthermore, when the middle part of the grid does not need to be provided 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 the lifting block, and the side wall of the lifting block is provided with a wedge block, which cooperates with the sleeve, and the left and right movement of the wedge block can adjust the height of the lifting block, thereby changing the height of the magnet; Furthermore, in order to fix the lifting block at a corresponding height, the sleeve is provided with positioning holes distributed on the left and right, a pull rod is passed 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 engaged with the positioning hole.

[0013] The beneficial effects achieved by the present invention using the above structure are as follows: the magnet on the positioning chuck can automatically absorb the steel bars in the material frame, and then fix all the steel bars in the welding position through the positioning block, so as to realize one-time positioning of all the steel bars and improve the positioning efficiency. The positioning operation is an off-line operation, which is separated from the welding operation and will not affect the welding operation, making it convenient for the operator to directly carry out the next welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 It is a structural schematic diagram of a positioning chuck in Embodiment 1 of the present invention; Figure 3 for Figure 2 Exploded diagram of Figure 4 for Figure 2 A cross-sectional view of Figure 5It is a structural schematic diagram of a positioning chuck in Embodiment 2 of the present invention; Figure 6 for Figure 5 Exploded diagram of Figure 7 This is a schematic diagram of the connection relationship of the sleeves in the second embodiment of the present invention; Figure 8 It is a schematic diagram of the position relationship between the lifting block and the wedge block; Fig. 9 It is a schematic diagram of the structure of the sleeve.

[0015] Among them, 1. material frame, 2. vibration motor, 3. positioning chuck, 4. fixing plate, 5. guide column, 6. connecting plate, 7. sliding sleeve, 8. first spring, 9. central frame, 10. sleeve, 11. magnet, 12. positioning block, 13. handle, 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. pitch adjustment rod, 23. pull rod, 24. third spring, 25. positioning hole.

[0016] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0019] like Figure 1 As shown, the present invention proposes a steel bar self-positioning tool for welding a household appliance grid, comprising a material frame 1 and a vibration motor 2, wherein the vibration motor 2 is arranged on the side wall of the material frame 1, and vibration springs are arranged in an array below the material frame 1. The vibration motor 2 drives the material frame 1 to vibrate at a high frequency, and 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; 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, and the spacing and number of the steel bars are pre-set by the positioning chuck 3. The positioning chuck 3 can be taken out of the material frame 1 and then installed on the welding work platform. The positioning of the positioning chuck 3 can be completed through two positioning points on the work platform, thereby positioning all the steel bars. During welding operations, the operator does not need to spend a lot of extra time on positioning work, and can automatically position the steel bars outside the line, thereby improving the efficiency of welding operations.

[0020] like Figure 2-Figure 4 As shown, the positioning chuck 3 includes a fixing plate 4. During operation, the fixing plate 4 is placed above the steel bar in the material frame 1. A central frame 9 capable of sliding up and down is provided in the middle of the fixing plate 4.

[0021] A sleeve 10 is provided in a linear array along the horizontal direction in the central frame 9, and a magnet 11 is provided in the sleeve 10. The spacing between adjacent magnets 11 is equal. When the material frame 1 vibrates, the magnet 11 will absorb the nearest steel bar, and the absorbed steel bar will adapt to the position of the magnet 11 in the horizontal direction. The position of the magnet 11 is pre-set, so that each steel bar is positioned at the set position.

[0022] The lower wall of the fixing plate 4 is symmetrically provided with positioning blocks 12 distributed in an array, and the positioning blocks 12 are adapted to the positions of the sleeve 10 and the magnet 11. After the steel bar is adsorbed by the magnet 11, the positioning blocks 12 play an auxiliary positioning role, and after the magnet 11 is subsequently separated from the steel bar, the positioning blocks 12 can fix the steel bar without shifting left or right; An auxiliary groove 15 is provided at the lower end of the fixing block. 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 restricted by the auxiliary groove 15 to prevent the two from interfering with each other when positioning the steel bar.

[0023] In order to release the adsorbed steel bar and separate it from the magnet 11, a handle 13 is provided on the fixed plate 4 and a pull handle 14 is provided on the central frame 9. The palm of the hand holds the handle 13, the fingers hook the pull handle 14, and the pull handle 14 is pulled upward, so that the central frame 9 is pulled up 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, and the steel bar will be separated from the magnet 11. At this time, the magnetic force on the steel bar can no longer overcome the gravity of the steel bar, and the steel bar will fall automatically.

[0024] In order to enable the magnet 11 to automatically reset to its initial state, guide columns 5 are symmetrically provided on both sides of the fixed plate 4, a sliding sleeve 7 is slidably provided 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, and a central frame 9 is fixed on the connecting plate 6.

[0025] In some embodiments, the steel bar is placed in the material frame 1, and the positioning chuck 3 is placed on the steel bar as a whole, and the vibration motor 2 is started. The vibration motor 2 drives the material frame 1 to vibrate at a high frequency, so that the steel bar in the material frame 1 moves back and forth horizontally relative to the positioning chuck 3. When the steel bar vibrates at a high frequency, the steel bar will be evenly distributed without local bulges, which makes it easier for the positioning chuck 3 to adsorb the steel bar.

[0026] The steel bar vibrates back and forth. When the steel bar moves under the magnet 11, the steel bar closest to the magnet 11 will be quickly adsorbed under the action of the magnetic force. Both 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, thereby completing the preliminary positioning of the steel bar to be welded.

[0027] After positioning the steel bars, the worker holds the handle 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 jig to be welded. At this time, it is only necessary to overlap the positioning chuck 3 with the two positioning points on the horizontal plane to complete the positioning of all steel bars. There is no need to position all the steel bars one by one.

[0028] After the steel bar is positioned, the handle 14 is pulled up by fingers, and the handle 14 drives the central frame 9 to move up, and the sleeve 10 in the central frame 9 moves up synchronously, and drives the magnet 11 to move up. After the magnet 11 moves up, the steel bar is restricted by the positioning hole 25 and cannot move with it. When it moves to a certain distance, the magnetic force cannot overcome the gravity of the steel bar, and the steel bar will automatically fall down. 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 waiting for welding.

[0029] When the 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 the initial state.

[0030] Then the positioning chuck 3 is re-placed on the steel bars in the material frame 1, and the vibration motor 2 continues to vibrate. The operator performs welding operations on the last batch of positioned steel bars, while the positioning chuck 3 simultaneously positions the next round of steel bars. Both are performed simultaneously without interfering with each other.

[0031] like Figure 5-Figure 7As shown, in order to facilitate the adjustment of the welding spacing of the steel bars, the spacing of the magnets 11 can be adjusted as needed, so as to be suitable for products of different models. The second springs 20 are connected between the sleeves 10, and all the second springs 20 are connected in series through the sleeves 10. When any sleeve 10 is compressed and displaced, all the second springs 20 are subjected to the same pressure and the deformation is also the same, 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, and a pitch-adjusting rod 22 is rotatably provided on the transition rod 21. The pitch-adjusting rod 22 is threadedly rotated on the side wall of the central frame 9. When the pitch-adjusting rod 22 is rotated, the pitch-adjusting rod 22 and the transition rod 21 squeeze the sleeve 10, and the sleeve 10 is displaced and compresses the second spring 20. The pressure and deformation will be synchronously transmitted to other second springs 20, so that the spacing between the heads of adjacent sleeves 10 changes synchronously and remains the same. When changing the spacing between the magnets 11, in order to synchronously adjust the position of the positioning block 12, a connecting rod 17 is provided on 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, the connecting rod 17 will be driven to move synchronously. The connecting rod 17 synchronously drives the positioning block 12 to move through the lifting rod 16, and when the connecting rod 17 follows the sleeve 10 to rise and fall, it also rises and slides along the lifting rod 16 without being hindered by the lifting rod 16.

[0032] In some embodiments, when it is necessary to produce products of different models, the spacing of the sleeves 10 is first adjusted according to the spacing of the steel bars on the grid to be welded: the spacing rod 22 is rotated, the spacing rod 22 squeezes the sleeve 10 through the transition rod 21, the sleeve 10 compresses the second spring 20, and the second spring 20 transfers the pressure to the remaining second springs 20 in turn, so that the deformation of all second springs 20 is the same, and finally the spacing between all adjacent sleeves 10 is the same.

[0033] When the spacing between the sleeves 10 is adjusted, the connecting rod 17 also drives the positioning blocks 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 .

[0034] During the subsequent positioning operation, the operation steps of the first embodiment are repeated and the handle is pulled upwards.

[0035] like Figure 7-Figure 9 As shown, when the middle part 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 11, the magnet 11 is slidably arranged in the sleeve 10 through the lifting block 18, and the side wall of the lifting block 18 is provided with a wedge block 19, which cooperates with the sleeve 10. The wedge block 19 moves left and right to adjust the height of the lifting block 18, thereby changing the height of the magnet 11; In order to fix the lifting block 18 at a corresponding height, the sleeve 10 is provided with positioning holes 25 distributed on the left and right, and 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, and the bottom of the pull rod 23 is engaged with the positioning hole 25. When the pull rod 23 is pulled upward, 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 a limited position, the pull rod 23 is released. Under the action of the third spring 24, the pull rod 23 is re-embedded in the current positioning hole 25 and fixed, thereby fixing the height of the lifting block 18. At this time, the magnet 11 shrinks upward and will no longer be adsorbed to the steel bar below. In some embodiments, there is no need to set the magnet 11 corresponding to the steel bar area to move upward, thereby reducing the influence of the magnetic force on the steel bar, and automatically vacating this area when the steel bar is adsorbed.

[0036] During the specific operation, the pull rod 23 is pulled out upward, and the pull rod 23 overcomes the resistance of the third spring 24 and moves upward, and the bottom of the pull rod 23 is separated from a positioning hole 25 on the sleeve 10, and then the wedge block 19 is pushed, and the lifting block 18 moves upward when the wedge block 19 drives the magnet 11 at the bottom to move upward.

[0037] Then release the pull rod 23, which 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. Here, the distance between the magnet 11 and the steel bar in the material frame 1 is large, and the magnetic force cannot overcome the gravity of the steel bar to attract the steel bar, thereby completing the adjustment of the distribution of the steel bar.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to 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; The 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. The positions of the positioning blocks (12) and the magnets (11) are adapted to each other.

2. The self-positioning tool for steel bars used for welding the grid of household appliances according to claim 1, characterized in that: Sleeves (10) are arranged in a linear array along 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).

3. The self-positioning tool for steel bars used for welding the grid frame of household appliances according to claim 1, characterized in that: Guide columns (5) are symmetrically arranged on both sides of the fixed 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 fixed plate (4); and a pull handle (14) is arranged on the central frame (9).

4. The self-positioning tool for steel bars used for welding the grid frame of household appliances according to claim 1, characterized in that: 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) matches the height of the bottom end of the magnet (11).

5. The self-positioning tool for steel bars used for welding the grid frame of household appliances according to claim 2, characterized in that: A second spring (20) is connected between the sleeves (10).

6. The self-positioning tool for steel bars used for welding the grid frame of household appliances according to claim 5, characterized in that: 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).

7. The self-positioning tool for steel bars used for welding the grid frame of household appliances according to claim 6, characterized in that: 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).

8. The self-positioning tool for steel bars used for welding the grid frame of household appliances according to claim 7, characterized in that: 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).

9. The self-positioning tool for steel bars used for welding the grid frame of household appliances according to claim 8, 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).

10. The self-positioning tool for steel bars used for welding the grid frame of household appliances according to claim 9, 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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