Structure and method for welding, assembling and positioning of non-through-hole special-shaped joints of hydraulic cylinders

Abstract

The present invention discloses a structure and method for welding, assembling, and positioning non-through-hole, special-shaped joints for hydraulic cylinders. First, holes are drilled in the non-through-hole, special-shaped rear joint and the cylinder bottom. Next, one end of an existing hanging ring is inserted into the rear joint hole, and the other end into the cylinder bottom hole, and the inlet pipe is aligned. Finally, a contour line is drawn against the rear joint surface, the inlet pipe assembly and hanging ring are removed, and the rear joint and cylinder bottom are welded according to the drawn contour line. This method is suitable for cylinders with diameters ranging from Φ140 to Φ630 mm. Because the drawn fine lines are welded according to the contour line, operator error is minimal, resulting in a post-weld error of less than 1 mm, fully meeting the requirements of the drawing process. This solves the problems of errors caused by marking and positioning in the early stages, as well as the impact of drilling iron chips on cleanliness.

Description

Technical Field

[0001] The present invention relates to a processing technology for a column and a jack hydraulic cylinder of a hydraulic support for coal mines, and in particular to a structure and method for welding, assembling and positioning a non-through hole special-shaped joint of a hydraulic cylinder. Background Art

[0002] The dimensional accuracy and cleanliness of the columns and jack hydraulic cylinders are extremely important for the key hydraulic system of the hydraulic support. Its accuracy is related to the subsequent installation and use, and its cleanliness is related to the reliable use of the entire hydraulic system.

[0003] In the prior art, conventional oil cylinder joint drilling is generally performed by through-hole drilling. After drilling through, the hole is welded and sealed at the top of the joint, which easily causes welding defects and increases quality risks.

[0004] Non-through hole special-shaped joints generally use marking positioning drilling, which is prone to deviation from the marking positioning reference, resulting in misalignment between the joint hole and the cylinder body liquid inlet hole after welding, affecting the flow of liquid.

[0005] The current problem with non-through-hole special-shaped joints is that, according to the process requirements of the drawings, cross lines are drawn on the cylinder bottom and rear joint for positioning. In theory, this can fully meet the requirements. However, in practice, due to deviations in the workers' drawing, errors in the drawing tools, and deviations during assembly, the accumulated deviations result in excessive errors.

[0006] In view of this, the present invention is proposed. Summary of the Invention

[0007] The purpose of the present invention is to provide a structure and method for welding, assembling and positioning non-through hole special-shaped joints of hydraulic cylinders, so as to solve the above-mentioned technical problems existing in the prior art.

[0008] The purpose of the present invention is achieved through the following technical solutions:

[0009] The structure for welding, assembling and positioning a non-through-hole special-shaped joint of a hydraulic oil cylinder of the present invention comprises a rear joint, an oil cylinder and a hanging ring;

[0010] The rear joint and the bottom of the oil cylinder are respectively drilled with holes;

[0011] One end of the hanging ring is plugged into the rear joint hole, and the other end is plugged into the cylinder bottom hole, and the rear joint is assembled with the liquid inlet pipe;

[0012] The rear joint is welded to the bottom of the oil cylinder.

[0013] The structure and method for welding, assembling and positioning non-through hole special-shaped joints of hydraulic cylinders include the following steps:

[0014] First, drill holes in the rear joint and the bottom of the cylinder;

[0015] Then, plug one end of the hanging ring into the rear joint hole and the other end into the bottom hole of the cylinder, and align the liquid inlet pipe;

[0016] Afterwards, draw the outline close to the surface of the rear joint, remove the liquid inlet pipe assembly, remove the hanging ring, and weld the rear joint and the bottom of the cylinder according to the drawn outline.

[0017] Compared with the existing technology, the structure and method for welding, assembling and positioning of non-through-hole special-shaped joints of hydraulic cylinders provided by the present invention have smaller errors in workers' operation due to the thin lines drawn and welding according to the contour lines, and the error after welding is less than 1mm, which fully meets the requirements of the drawing process and solves the problems of errors caused by marking and positioning in the early stage and the impact of drilling iron chips on cleanliness. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a non-through hole special-shaped connector.

[0019] Figure 2 The present invention provides a structural schematic diagram for the welding, assembly and positioning of non-through-hole special-shaped joints of hydraulic cylinders.

[0020] Figure 3 This is the assembly welding diagram of the embodiment of the present invention.

[0021] In the picture:

[0022] 1. Non-through hole special-shaped connector, 2. Hanging ring, 3. Cylinder body. DETAILED DESCRIPTION

[0023] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. It is obvious that the described embodiments are only some of the embodiments of the present invention, not all of them, and do not constitute a limitation of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0024] First, the following terms may be used in this article:

[0025] The term “and / or” means that either or both of them can be realized at the same time. For example, X and / or Y includes both “X” or “Y” and “X and Y”.

[0026] The terms "include," "comprises," "contains," "has," or other similar expressions should be interpreted as non-exclusive. For example, "including certain technical features (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products, or manufactured articles, etc.) should be interpreted as including not only the technical features explicitly listed, but also other technical features known in the art that are not explicitly listed.

[0027] The term "consisting of" excludes any technical features not explicitly listed. If used in a claim, this term renders the claim closed, excluding any technical features other than those explicitly listed, except for conventional impurities associated with them. If this term appears only in a clause of a claim, it limits only the elements explicitly listed in that clause; elements listed in other clauses are not excluded from the claim as a whole.

[0028] Unless otherwise specified or limited, the terms "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this document based on specific circumstances.

[0029] The terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings and are only for the convenience and simplification of description, and do not explicitly or implicitly indicate that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation to this document.

[0030] The contents not described in detail in the examples of the present invention belong to the prior art known to those skilled in the art. If specific conditions are not specified in the examples of the present invention, the methods are carried out according to conventional conditions in the art or the conditions recommended by the manufacturer. If the manufacturers of the reagents or instruments used in the examples of the present invention are not specified, they are all conventional products that can be purchased commercially.

[0031] The structure for welding, assembling and positioning a non-through-hole special-shaped joint of a hydraulic oil cylinder of the present invention comprises a rear joint, an oil cylinder and a hanging ring;

[0032] The rear joint and the bottom of the oil cylinder are respectively drilled with holes;

[0033] One end of the hanging ring is plugged into the rear joint hole, and the other end is plugged into the cylinder bottom hole, and the rear joint is assembled with the liquid inlet pipe;

[0034] The rear joint is welded to the bottom of the oil cylinder.

[0035] The rear joint is a non-through hole special-shaped joint.

[0036] The hanging ring is an existing part.

[0037] The cylinder diameter of the oil cylinder is Φ140-Φ630mm.

[0038] The above method for welding, assembling and positioning a non-through hole special-shaped joint of a hydraulic cylinder comprises the following steps:

[0039] First, drill holes in the rear joint and the bottom of the cylinder;

[0040] Then, plug one end of the hanging ring into the rear joint hole and the other end into the bottom hole of the cylinder, and align the liquid inlet pipe;

[0041] Afterwards, draw the outline close to the surface of the rear joint, remove the liquid inlet pipe assembly, remove the hanging ring, and weld the rear joint and the bottom of the cylinder according to the drawn outline.

[0042] In summary, the present invention solves the problems of errors caused by marking and positioning and the impact of drilling iron chips on cleanliness in the early stage through an innovative processing method.

[0043] In order to more clearly demonstrate the technical solutions and technical effects provided by the present invention, the embodiments of the present invention are described in detail below with reference to specific embodiments.

[0044] Example 1

[0045] like Figures 1 to 3 As shown, using an existing part—a hanging ring—one end is inserted into the hole in the rear joint and the other into the hole in the cylinder bottom. After aligning the inlet pipe, a sharpened stone pencil is placed against the surface of the rear joint to draw the outline. Remove the inlet pipe assembly, remove the hanging ring, and after welding the inlet pipe assembly, weld it along the drawn outline. Because the drawn lines are fine and welding according to the outline minimizes operator error, the weld error is less than 1mm, fully meeting the process requirements of the drawing.

[0046] The specific technical points are:

[0047] 1) To resolve the error caused by marking and positioning, first insert the part into the cylinder hole for positioning, and then mark it.

[0048] 2) No need to drill through the weld blockage, solving the problem of drilling iron chips affecting cleanliness and welding defects.

[0049] 3) Wide applicability: this method can be used for cylinder diameters of Φ140-Φ630mm.

[0050] The processing technology of cylinder body involving non-through hole special-shaped joints is as follows:

[0051] Grinding - Assembling cylinder bottom and cylinder tube - Welding main welds - Grinding - Cylinder body and joint marking - Grinding - Assembly and positioning - Preheating, welding joints and accessories, insulation - Grinding.

[0052] At present, this batch of welding structures has been applied to the exported ZY14790 / 15 / 25D shielded hydraulic support. The new assembly positioning welding structure reduces the frequency of rework. Normally, 30 products require rework for positioning welding on the planning line, accounting for 10%. The rework frequency is high. The batch of products is 340 pieces, and the rework cost is about 34*50 (rework labor cost) + 700 (rework labor cost) = 2,400 yuan. The revenue of this batch of products is 200.2 million yuan, accounting for about 30%*15%*1%*200.20=90,000 yuan of revenue, generating a total economic benefit of 92,400 yuan.

[0053] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims. The information disclosed in the background technology section of this article is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or any form of implication that the information constitutes prior art already known to those skilled in the art.

Claims

1. A structure for welding, assembling and positioning non-through hole special-shaped joints of hydraulic cylinders to realize welding, assembling and positioning method of non-through hole special-shaped joints of hydraulic cylinders, characterized by: The structure for welding, assembling and positioning non-through-hole special-shaped joints of hydraulic cylinders comprises a rear joint, a cylinder and a hanging ring; The rear joint and the bottom of the oil cylinder are respectively drilled with holes; One end of the hanging ring is plugged into the rear joint hole, and the other end is plugged into the cylinder bottom hole, and the rear joint is assembled with the liquid inlet pipe; The rear joint is welded to the bottom of the oil cylinder; The rear joint is a non-through hole special-shaped joint; The method for welding, assembling and positioning a non-through-hole special-shaped joint of a hydraulic cylinder comprises the following steps: First, drill holes in the rear joint and the bottom of the cylinder; Then, plug one end of the hanging ring into the rear joint hole and the other end into the bottom hole of the cylinder, and align the liquid inlet pipe; Afterwards, draw the outline close to the surface of the rear joint, remove the liquid inlet pipe assembly, remove the hanging ring, and after welding the liquid inlet pipe assembly, weld the rear joint and the bottom of the cylinder according to the drawn outline.

2. The method according to claim 1, characterized in that The hanging ring is an existing part.

3. The method according to claim 2, characterized in that The cylinder diameter of the oil cylinder is Φ140-Φ630mm.

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