Lifting support mechanism and high-precision welding method

Abstract

The invention discloses a lifting support mechanism and a high-precision welding method, and belongs to the field of lifting support mechanism machining. The production problems that in the prior art, the size precision is high, and machining difficulty is large are solved. According to the technical scheme, sleeves are welded to the left and right sides of the bottom of a bottom plate correspondingly, and side plates are welded to the front and rear sides of the bottom plate correspondingly; a through hole is formed in the bottom plate, the sleeve and the bottom plate are respectively fixed through a first reinforcing rib, and the bottom plate and the side plate are respectively fixed through a second reinforcing rib; connecting holes are formed in the side plates, and the guide shaft pipes penetrate through the first reinforcing ribs to be welded to the connecting holes. The welding method of carbon dioxide arc welding is adopted, the production cost of products is reduced, and the forming efficiency of the products is improved; the dimensional tolerance and the form and location tolerance are guaranteed in the assembly welding state, deep cavity numerical control machining after assembly welding is effectively avoided, the problems of poor rigidity caused by too long cutter extension and deviation caused by machine tool precision are solved, the machining difficulty is reduced, and the product quality is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of lifting support mechanism processing technology, specifically to a lifting support mechanism and a high-precision welding method. Background Technology

[0002] Currently, the main processing method for lifting support mechanisms is to weld the parts together and then use CNC milling to ensure the dimensions and tolerances of the products. Its advantages are strong load-bearing capacity, suitability for heavy-duty supports, good structural rigidity, resistance to impact and vibration, and high material utilization.

[0003] However, because the two deep holes in the lifting support mechanism are machined with fine-diameter milling cutters, tool deflection occurs during machining, resulting in the actual cutting diameter being smaller than the programmed depth. This leads to workpiece dimensions, shape, and positional accuracy exceeding tolerances, surface defects, and failure to meet assembly and usage requirements. This increases rework and scrap rates, shortens tool life, reduces production efficiency, and significantly increases machining and maintenance costs. Special rigid tools and multiple precision machining operations on the bosses are required, but these are costly and difficult to manufacture, making them unsuitable for batch testing.

[0004] Therefore, there is an urgent need to propose a lifting support mechanism and a high-precision welding method to solve the production problems of high dimensional accuracy and high processing difficulty in the existing technology. Summary of the Invention

[0005] In view of the above facts, in order to solve the production problems of high dimensional accuracy and high processing difficulty in the prior art, the present invention designs a lifting support mechanism and a high-precision welding method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Option 1: A lifting support mechanism, comprising a sleeve, a base plate, a side plate, a first reinforcing rib, and a second reinforcing rib;

[0008] Sleeves are welded to the left and right sides of the bottom of the base plate, and side plates are welded to the front and rear sides of the base plate.

[0009] The base plate has through holes, and the sleeve and the base plate are fixed together by the first reinforcing rib, and the base plate and the side plate are fixed together by the second reinforcing rib.

[0010] Furthermore, the sleeve is provided with a circular hole.

[0011] Furthermore: the side plate is provided with a connecting hole, and the guide tube passes through the first reinforcing rib and is welded to the connecting hole.

[0012] Furthermore: the inner hole of the sleeve has a depth of 100mm, a perpendicularity of 0.02mm to the base plate, and a hole spacing tolerance of 0.02mm.

[0013] Furthermore, the diameter tolerance of the sleeve is 0.025 mm.

[0014] Option 2: The high-precision welding method for the lifting support mechanism described in Option 1 is as follows:

[0015] Step 1: Cut the sleeve, base plate, side plate, first reinforcing rib, and second reinforcing rib into their respective materials;

[0016] Step 2: Rough turn the outer shape of the sleeve, rough mill the bottom plate and side plate, and directly machine the first and second reinforcing ribs to the required dimensions;

[0017] Step 3: Precision machine the outer and inner diameter of the sleeve, and precision grind the upper and lower surfaces of the base plate;

[0018] Step 4: Use a special welding fixture positioning sleeve to ensure that the sleeve is perpendicular to the bottom surface of the special welding fixture and is fixed.

[0019] Step 5: Weld the sleeve and base plate using carbon dioxide gas shielded welding. Select the current, voltage, and gas flow parameters, and use symmetrical spot welding to weld the sleeve. After the temperature drops to room temperature, perform symmetrical intermittent welding. Repeat the above process multiple times until the final weld is formed.

[0020] Step Six: Perform CNC machining on the remaining surfaces of the base plate and side plates;

[0021] Step 7: After completing all welding work, disassemble the special welding fixture.

[0022] Furthermore, in step three, the coaxiality of the inner hole and outer circle is ensured to be within 0.02mm, and the flatness of the upper and lower surfaces of the base plate is within 0.02mm.

[0023] Furthermore, in step five, the current is 200A, the voltage is 220V, and the gas flow rate is 10L / min.

[0024] Furthermore, in step five, the welding deformation of the sleeve and the base plate is controlled by controlling the heat output. Each welding requires disassembling and assembling a special tooling, so that the deformation of each welding is controllable.

[0025] The beneficial effects of this invention are as follows:

[0026] 1. This invention employs a carbon dioxide gas shielded welding method, which reduces product production costs, minimizes additional expenses related to gas ratio, and improves product forming efficiency.

[0027] 2. This invention improves welding efficiency and enables automated welding of batches of workpieces.

[0028] 3. This invention ensures dimensional and geometric tolerances during component welding, reducing processing difficulty.

[0029] 4. This invention effectively avoids deep cavity CNC machining after component welding, solves the problems of poor rigidity caused by excessive tool extension and deviation caused by machine tool precision, reduces machining difficulty, and effectively improves product quality. Attached Figure Description

[0030] Figure 1 This is a diagram showing the positional relationship between the sleeve, base plate, first reinforcing rib, and second reinforcing rib of the present invention.

[0031] Figure 2 for Figure 1 A-direction cross-section view;

[0032] Figure 3 This is a bottom view of the present invention.

[0033] In the figure: 1-sleeve, 2-base plate, 3-side plate, 4-first reinforcing rib, 5-second reinforcing rib, 6-guide shaft tube, 7-through hole, 8-round hole. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0035] The terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0038] Example 1: Reference Figure 1-3 This embodiment describes a lifting support mechanism, which includes a sleeve 1, a base plate 2, a side plate 3, a first reinforcing rib 4, and a second reinforcing rib 5.

[0039] Sleeves 1 are welded to the left and right sides of the bottom of the base plate 2, and side plates 3 are welded to the front and rear sides of the base plate 2.

[0040] The base plate 2 has a through hole 7. The sleeve 1 and the base plate 2 are fixed together by the first reinforcing rib 4, and the base plate 2 and the side plate 3 are fixed together by the second reinforcing rib 5.

[0041] More specifically: the sleeve 1 is provided with a circular hole 8.

[0042] More specifically: the side plate 3 is provided with a connecting hole, and the guide tube 6 passes through the first reinforcing rib 4 and is welded to the connecting hole.

[0043] More specifically: the inner hole of the sleeve 1 has a depth of 100mm, a perpendicularity of 0.02mm to the base plate 2, and a hole spacing tolerance of 0.02mm.

[0044] More specifically: the diameter tolerance of the sleeve 1 is 0.025 mm.

[0045] More specifically: the lifting support mechanism has a length of 310mm, a width of 128mm, a height of 122mm, a base plate thickness of 12mm, and a through hole diameter of 22.5mm.

[0046] More specifically: the edges of the through holes, round holes, connecting holes, and inner holes are chamfered at 2×45°, and the remaining sharp edges are chamfered at R1.

[0047] Example 2: The high-precision welding method for the lifting support mechanism described in Example 1 is as follows:

[0048] Step 1: Cut the sleeve 1, base plate 2, side plate 3, first reinforcing rib 4, and second reinforcing rib 5 into their respective parts;

[0049] Step 2: Rough turn the outer shape of sleeve 1, rough mill the bottom plate 2 and side plate 3, and directly machine the first reinforcing rib 4 and the second reinforcing rib 5 to the required dimensions;

[0050] Step 3: Precision machine the outer shape and inner hole of sleeve 1, and precision grind the upper and lower surfaces of base plate 2;

[0051] Step 4: Use a special welding fixture to position the sleeve 1, ensuring that the sleeve 1 is perpendicular to and fixed to the bottom surface of the special welding fixture;

[0052] Step 5: Weld sleeve 1 and base plate 2 using carbon dioxide gas shielded welding. Select current, voltage and gas flow parameters, use symmetrical spot welding to weld sleeve 1, and then perform symmetrical intermittent welding at room temperature. Repeat the above process multiple times until the final weld is formed.

[0053] Step Six: Perform CNC machining on the remaining surfaces of base plate 2 and side plate 3;

[0054] Step 7: After completing all welding work, disassemble the special welding fixture.

[0055] More specifically: In step two, the inner and outer walls of the sleeve 1 each have a 1mm allowance, the top and bottom surfaces of the base plate 2 have a 0.5mm allowance, and the remaining surfaces are machined to the required dimensions. The top and bottom surfaces of the side plate 3 have a 1mm allowance, and the remaining surfaces are machined to the required dimensions.

[0056] More specifically: In step three, ensure that the inner hole and outer circle are coaxial within 0.02mm, and that the flatness of the upper and lower surfaces of the base plate 2 is within 0.02mm.

[0057] More specifically: In step five, the current is 200A, the voltage is 220V, and the gas flow rate is 10L / min.

[0058] More specifically: In step five, the welding deformation of sleeve 1 and base plate 2 is controlled by controlling the heat output. Each welding requires disassembling and assembling a special tooling to make the deformation of each welding controllable.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; as long as there is no structural conflict, the various features in the specific embodiments disclosed in this application can be combined with each other in any way, and will not cause the substance of the corresponding technical solutions to deviate from the scope of the technical solutions of the present invention.

[0060] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A lifting support mechanism, characterized by, Sleeve (1), bottom plate (2), side plate (3), first reinforcing rib (4), second reinforcing rib (5); The left and right sides of the bottom plate (2) are respectively welded with sleeve (1), and the front and rear sides of the bottom plate (2) are respectively welded with side plate (3); The bottom plate (2) is provided with a through hole (7), and the sleeve (1) and the bottom plate (2) are respectively fixed by the first reinforcing rib (4), and the bottom plate (2) and the side plate (3) are respectively fixed by the second reinforcing rib (5).

2. The lift support mechanism of claim 1, wherein, The sleeve (1) is provided with a circular hole (8).

3. The lift support mechanism of claim 1, wherein, The side plate (3) is provided with a connecting hole, and the guide shaft tube (6) passes through the first reinforcing rib (4) and is welded with the connecting hole.

4. The lift support mechanism of claim 1, wherein, The hole depth of the sleeve (1) is 100mm, the perpendicularity of the bottom plate (2) is 0.02mm, and the hole distance tolerance is 0.02mm.

5. The lift support mechanism of claim 1, wherein, The diameter tolerance of the sleeve (1) is 0.025mm.

6. The method of claim 1, wherein the method further comprises: Specifically: Step one: sleeve (1), bottom plate (2), side plate (3), first reinforcing rib (4), second reinforcing rib (5) are respectively blanked; Step two: rough turning the outer shape of the sleeve (1), rough milling the bottom plate (2), side plate (3), first reinforcing rib (4), and second reinforcing rib (5) to the required size; Step three: finish turning the outer shape and hole of the sleeve (1), and finish grinding the upper and lower surfaces of the bottom plate (2); Step four: position the sleeve (1) with a special welding tool to ensure that the sleeve (1) is perpendicular to the bottom surface of the special welding tool and fixed; Step five: weld the sleeve (1) and the bottom plate (2) by carbon dioxide gas shielded welding, select current, voltage, and gas flow parameters, weld the sleeve (1) by symmetric spot welding, temperature to room temperature, perform symmetric intermittent welding, temperature to room temperature, weld multiple times above process, and finally weld into shape; Step six: perform numerical control machining of the remaining surfaces of the bottom plate (2) and side plate (3); Step seven: after completing all welding, disassemble the special welding tool.

7. The high-precision welding method of a lifting support mechanism according to claim 6, characterized by In step three, the hole outer circle is coaxial within 0.02mm, and the flatness of the upper and lower surfaces of the bottom plate (2) is within 0.02mm.

8. The high-precision welding method of a lifting support mechanism according to claim 6, characterized by, In step five, the current is 200A, the voltage is 220V, and the gas flow is 10L / min.

9. The high-precision welding method of a lifting support mechanism according to claim 6, characterized by, In step five, by controlling the heat output, the welding deformation of the sleeve (1) and the bottom plate (2) is controlled, and the special tooling is disassembled once each time, so that the deformation of each welding is controllable.

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