Special-shaped pipe end opening wire carving tool

By designing the wire engraving tooling for the port of the special-shaped pipe fitting, the problem of pipe port deformation after the bend of the special-shaped pipe fitting is solved, and uniform capillary drainage of the welding liquid is achieved, and the welding quality and air tightness are improved.

CN223146546UActive Publication Date: 2025-07-25ANHUI ZHONGHUI REFRIGERATION
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Patent Information

Application Number
CN202422365968.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-27
Publication Date
2025-07-25
Estimated Expiration
2034-09-27

AI Technical Summary

Technical Problem

In the prior art, when the special-shaped pipe fitting is wire-etched after the bent pipe is formed, the pipe mouth is prone to deform, resulting in the welding liquid being unable to uniformly lead to the capillary drainage, affecting the airtightness.

Method used

A special-shaped pipe fitting port wire engraving tool is designed, including a positioning structure and a wire engraving mold. The special-shaped pipe fitting is fixed by upper and lower positioning blocks, and the pipe opening is shaped and engraved with adjustable wire engraving rings and wire engraving bodies. The wire engraving body is an isosceles triangle structure. The wire engraving ring is set to form a slope or taper away from the pipe fitting port to ensure accurate wire engraving of the pipe opening.

Benefits of technology

Accurate wire etching of the pipe openings of special-shaped pipe fittings is achieved, ensuring uniform capillary drainage of the welding liquid, and improving welding quality and airtightness.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a special-shaped pipe end opening wire carving tool which comprises a positioning structure, a wire carving structure and a wire carving structure. The positioning structure comprises an upper positioning block and a lower positioning block, and the upper positioning block and the lower positioning block are used for positioning a special-shaped pipe; the wire carving die comprises a wire carving ring which is adjustable relative to the axial position of the pipe opening of the special-shaped pipe fitting, wire carving bodies are evenly distributed in the wire carving ring, the wire carving ring is used for shaping the pipe opening of the special-shaped pipe fitting, and the wire carving bodies are used for evenly carving wires on the surface of the shaped pipe opening. The upper positioning block and the lower positioning block are used for vertically pressing and fixing the body part of the area near the short end opening of the special-shaped pipe fitting, the position and the exposed size of the pipe opening of the special-shaped pipe fitting are ensured, the pipe opening of the special-shaped pipe fitting is shaped through the wire carving ring, and meanwhile the outer wall of the pipe opening of the pipe fitting is subjected to wire carving treatment in the axial direction through the wire carving body in the wire carving ring. An air cylinder and other drivers can be installed at the end, away from the special-shaped pipe fitting, of the carving ring to achieve adjustment of the axial position.
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Description

Technical Field

[0001] The utility model relates to the technical field of short-end wire engraving, in particular to a wire engraving tooling for the ports of special-shaped pipe fittings. Background Art

[0002] As Figure 9 shown in the special-shaped pipe fitting (copper), it needs to be obtained through multiple pipe bending forming operations. However, in subsequent assembly (socket welding after insertion), when it is to be assembled on a stainless steel pipe fitting (as Figure 8 shown), in order to ensure the welding quality of the weld, in the past, wire engraving treatment was carried out on the pipe orifice of the special-shaped pipe fitting to realize the capillary drainage operation of the welding liquid. If the wire engraving step is placed before the pipe bending forming operation, due to the limited reserved length at the pipe orifice end (about 10 mm), during the pipe bending forming operation, when clamping treatment is required on the surface of the wire engraved port, clamping damage to the wire engraved surface will occur in the pipe orifice area, and in severe cases, the pipe orifice will be deformed. Therefore, the wire engraving operation needs to be placed after the pipe bending forming operation. However, in this method, due to the too-close distance between the port and the pipe bending forming area, the pipe orifice will be deformed during the forming process. Although direct wire engraving can be achieved, due to the deformation of the pipe orifice, accurate wire engraving on the outer wall of the pipe orifice cannot be ensured, which will lead to the problem that the welding liquid cannot be evenly drained by capillary action later, and it is easy to cause insufficient airtightness of the pipe fitting. Content of the Utility Model

[0003] In order to solve the above technical problems, the inventor obtained the technical solution of the utility model through practice and summary. The utility model adopts the following technical scheme:

[0004] A wire engraving tooling for the ports of special-shaped pipe fittings, comprising:

[0005] A positioning structure, including an upper positioning block and a lower positioning block. On the opposite sides of the upper positioning block and the lower positioning block, special-shaped positioning structures are provided. The upper positioning block and the lower positioning block position the special-shaped pipe fitting through the special-shaped positioning structures;

[0006] A wire engraving die, including a wire engraving ring that is axially adjustable relative to the pipe orifice of the special-shaped pipe fitting. Wire engraving bodies are evenly distributed in the wire engraving ring. The wire engraving ring is used for shaping the pipe orifice of the special-shaped pipe fitting, and the wire engraving bodies are used for evenly wire engraving the surface of the shaped pipe orifice.

[0007] The upper positioning block and the lower positioning block are used to tightly press and fix the body part near the short port of the special-shaped pipe fitting through the special-shaped positioning structures. Among them, the upper positioning block is vertically adjustable, and a cylinder can be added on the side facing away from the lower positioning block to adjust the vertical height. The lower positioning block is fixed, so as to ensure the position and exposed size of the pipe orifice of the special-shaped pipe fitting. The pipe orifice of the special-shaped pipe fitting is shaped through the wire engraving ring, and at the same time, the outer wall of the pipe orifice of the pipe fitting is wire engraved axially through the wire engraving bodies inside the wire engraving ring. A cylinder or other driver can be installed at the end of the wire engraving ring far away from the special-shaped pipe fitting to realize the adjustment of the axial position.

[0008] Further solution:

[0009] The wire engraving body is in an isosceles triangle structure, and the included angle corresponding to the two side edges of the wire engraving body is 15 - 25°, wherein the thickness of the wire engraving body is 0.1 - 0.15 mm.

[0010] Extra strict restrictions are imposed on the thickness of the wire engraving body, so as to accurately obtain the corresponding wire engraving structure on the outer wall of the nozzle of the special-shaped pipe fitting, and further achieve the uniform capillary drainage effect of the welding liquid.

[0011] Further solution:

[0012] The areas of the two side edges of the wire engraving body close to the wire engraving ring are both concave arc structures, and the radius corresponding to the arc structure is 0.02 - 0.05 mm. The concave arc structure can release the wire engraving stress, and the wire engraving body is obtained by wire cutting.

[0013] Further solution:

[0014] The thickness of the wire engraving body near the port of the special-shaped pipe fitting is less than the thickness far from the port of the special-shaped pipe fitting. The strict thickness limit of the wire engraving body can facilitate obtaining a wire engraving depth that gradually decreases to zero away from the pipe nozzle on the outer wall of the pipe nozzle, so that the welding liquid flows to the side close to the stainless steel pipe fitting.

[0015] Further solution:

[0016] An inwardly converging structure is provided at one end of the wire engraving ring far from the port of the special-shaped pipe fitting, and the inwardly converging structure is used to form a certain slope or taper at the port of the special-shaped pipe fitting.

[0017] After forming the port of the special-shaped pipe fitting into a certain slope or taper through the inwardly converging structure, it is beneficial for axial insertion on the stainless steel pipe fitting.

[0018] Further solution:

[0019] The inwardly converging structure is arranged as an annular structure at one end of the wire engraving ring far from the port of the special-shaped pipe fitting, the width of the inwardly converging structure is 2 - 4 mm, and the inwardly converging structure is beneficial for forming the end taper or slope, and is convenient for the socket installation of the wire engraved nozzle of the special-shaped pipe fitting on the stainless steel pipe fitting.

[0020] Further solution:

[0021] The size of one end of the inwardly converging structure close to the port of the special-shaped pipe fitting is larger than the size of the end far from the port of the special-shaped pipe fitting, and the included angle between the inner circle of the inwardly converging structure and the inner wall of the wire engraving ring is 2 - 5°.

[0022] Further solution:

[0023] A flaring mouth is provided at a position of the wire engraving ring close to the port of the special-shaped pipe fitting, and the flaring mouth is used for shaping the port of the special-shaped pipe fitting. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the present utility model.

[0025] Figure 2 This is a state diagram of the positioning structure of the present utility model clamping a special-shaped pipe fitting.

[0026] Figure 3 This is a schematic diagram of the special-shaped positioning structure of the positioning block of the present utility model.

[0027] Figure 4 This is a right view of the wire engraving die of the present utility model.

[0028] Figure 5 It is Figure 4 A partial enlarged view of position B in

[0029] Figure 6 It is Figure 4 A sectional view taken along line A-A in

[0030] Figure 7 It is Figure 6 A partial enlarged view of one end of the wire engraving body close to the special-shaped pipe fitting in

[0031] Figure 8 It is a structural diagram of an existing stainless steel pipe fitting assembly.

[0032] Figure 9 It is Figure 8 A top view of the special-shaped pipe fitting in

[0033] In the figure: 10, upper positioning block; 20, lower positioning block; 30, wire engraving ring; 31, wire engraving body; 311, arc structure; 32, inward contraction structure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0035] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model 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, and therefore should not be construed as a limitation to the present utility model.

[0036] Example 1

[0037] As Figures 1 to 5 shown, a special-shaped pipe fitting port wire engraving tooling includes:

[0038] A positioning structure, including an upper positioning block 10 and a lower positioning block 20. Special-shaped positioning structures are provided on the opposite sides of the two. The upper positioning block 10 and the lower positioning block 20 are used for positioning the special-shaped pipe fitting through the special-shaped positioning structure;

[0039] A wire engraving die, including a wire engraving ring 30 whose axial position relative to the pipe orifice of the special-shaped pipe fitting is adjustable. Wire engraving bodies 31 are evenly distributed in the wire engraving ring 30. The wire engraving ring 30 is used for shaping the orifice of the special-shaped pipe fitting, and the wire engraving bodies 31 are used for evenly wire engraving the surface of the shaped orifice.

[0040] The upper positioning block 10 and the lower positioning block 20 are used to tightly press and fix the body part near the short port of the special-shaped pipe fitting from top to bottom, restricting the special-shaped part of the special-shaped pipe fitting to prevent deviation in angle and position during grooving, ensuring the position of the special-shaped pipe fitting port and the exposed size. The orifice of the special-shaped pipe fitting is shaped through the wire engraving ring 30. At the same time, the outer wall of the pipe orifice of the pipe fitting is wire engraved axially through the wire engraving bodies 31 inside the wire engraving ring 30. A driver such as a cylinder can be installed at one end of the wire engraving ring 30 away from the special-shaped pipe fitting to achieve axial position adjustment.

[0041] During specific use, the upper positioning block 10 is located at the top of the lower positioning block 20. The special-shaped pipe fitting is installed on the special-shaped positioning structure of the lower positioning block 20, and the upper positioning block 10 is lowered to tightly press and fix the special-shaped pipe fitting through the special-shaped positioning structure on it. The exposed length of the orifice of the special-shaped pipe fitting is limited. The driver drives the wire engraving ring 30 to axially approach the positioning structure to complete the shaping and wire engraving of the orifice of the special-shaped pipe fitting in one step.

[0042] The wire engraving body 31 is of an isosceles triangle structure. The included angle corresponding to the two side edges of the wire engraving body 31 is 15 - 25°. Among them, the thickness of the wire engraving body 31 is 0.1 - 0.15 mm. The thickness of the wire engraving body 31 is strictly restricted additionally, so as to accurately obtain the corresponding wire engraving structure on the outer wall of the orifice of the special-shaped pipe fitting, and further achieve the uniform capillary drainage effect of the welding liquid.

[0043] Regions of the two side edges of the wire engraving body 31 close to the wire engraving ring 30 are both concave arc structures 311. The radius corresponding to the arc structure 311 is 0.02 - 0.05 mm. The concave arc structure 311 can be used to release the wire engraving stress. The wire engraving body 31 is obtained by wire cutting.

[0044] The thickness of the wire engraving body 31 near the port of the special-shaped pipe fitting is less than that far from the port of the special-shaped pipe fitting. By strictly limiting the thickness of the wire engraving body 31, it is convenient to obtain a wire engraving depth gradually decreasing to zero away from the pipe orifice on the outer wall of the pipe orifice, so that the welding liquid flows to the side close to the stainless steel pipe fitting.

[0045] A flared opening is arranged at the position of the wire engraving ring 30 near the port of the special-shaped pipe fitting, and the flared opening is used for shaping the port of the special-shaped pipe fitting.

[0046] Embodiment 2

[0047] The following improvements are made on the basis of the above embodiment:

[0048] As Figures 1 to 7 As shown, an inwardly converging structure 32 is arranged at one end of the wire engraving ring 30 far from the port of the special-shaped pipe fitting, and the inwardly converging structure 32 is used to form a certain slope or taper at the port of the special-shaped pipe fitting. After the port of the special-shaped pipe fitting is formed into a certain slope or taper through the inwardly converging structure 32, it is beneficial for axial insertion on the stainless steel pipe fitting.

[0049] The inwardly converging structure 32 is arranged as an annular structure at one end of the wire engraving ring 30 far from the port of the special-shaped pipe fitting, and the width of the inwardly converging structure 32 is 2-4 mm. The inwardly converging structure 32 is beneficial for forming an end taper or slope, and is convenient for the socket and spigot installation of the wire engraved pipe orifice of the special-shaped pipe fitting on the stainless steel pipe fitting.

[0050] The dimension of one end of the inwardly converging structure 32 close to the port of the special-shaped pipe fitting is larger than that of the end far from the port of the special-shaped pipe fitting, and the included angle between the inner circle of the inwardly converging structure 32 and the inner wall of the wire engraving ring 30 is 2-5°.

[0051] The pipe orifice of the wire engraved special-shaped pipe fitting is trimmed by the inwardly converging structure 32 to form a certain taper for convenient axial socket and spigot installation on the stainless steel pipe fitting. When welding and processing with the stainless steel pipe fitting in a tunnel furnace, it should be noted that a welding ring with an open-loop structure and a diameter of 0.1-1 mm is sleeved on the pipe orifice of the special-shaped pipe fitting before socket and spigot connection. After socket and spigot connection, the welding ring will fit on the outer wall of the port of the stainless steel pipe fitting, and melt in the tunnel furnace and enter the tight fit seam between the pipe orifice of the special-shaped pipe fitting and the port of the stainless steel pipe fitting along the wire engraving structure to complete the assembly.

[0052] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. The substitution may be the substitution of part of the structure, device, method steps, or the entire technical solution. Any equivalent substitution or change made according to the technical solution of the present invention and its inventive concept should be covered by the protection scope of the present invention.

Claims

1. A special-shaped pipe fitting port wire engraving tooling, characterized in that include: The positioning structure comprises an upper positioning block (10) and a lower positioning block (20), wherein the upper positioning block (10) and the lower positioning block (20) are both provided with special-shaped positioning structures on opposite sides thereof, and the upper positioning block (10) and the lower positioning block (20) are used to position the special-shaped pipe fitting via the special-shaped positioning structures; The wire cutting die comprises a wire cutting ring (30) whose axial position relative to the pipe mouth of the special-shaped pipe fitting can be adjusted. The wire cutting ring (30) has wire cutting bodies (31) evenly arranged inside. The wire cutting ring (30) is used for shaping the pipe mouth of the special-shaped pipe fitting. The wire cutting bodies (31) are used for evenly cutting wire on the surface of the shaped pipe mouth.

2. A thread cutting tool for special-shaped pipe fittings according to claim 1, characterized in that: The cut-out body (31) is an isosceles triangle structure, and the angles corresponding to the two side edges of the cut-out body (31) are 15-25°, wherein the thickness of the cut-out body (31) is 0.1-0.15 mm.

3. A thread cutting tool for special-shaped pipe fittings according to claim 2, characterized in that: The areas on the two sides of the cutting body (31) close to the cutting ring (30) are both concave arc structures (311), and the corresponding radius of the arc structure (311) is 0.02-0.05 mm.

4. A thread cutting tool for special-shaped pipe fittings according to claim 3, characterized in that: The thickness of the cut-wire body (31) at a position close to the end of the special-shaped pipe fitting is smaller than the thickness at a position far from the end of the special-shaped pipe fitting.

5. The thread cutting tool for special-shaped pipe fittings according to claim 1, characterized in that: An end of the engraving ring (30) away from the port of the special-shaped pipe fitting is provided with an inward-retracting structure (32), and the inward-retracting structure (32) is used to form a certain slope or taper at the port of the special-shaped pipe fitting.

6. A thread cutting tool for special-shaped pipe fittings according to claim 5, characterized in that: The retracted structure (32) is an annular structure arranged in the engraving ring (30) at one end away from the port of the special-shaped pipe fitting, and the width of the retracted structure (32) is 2-4 mm.

7. The thread cutting tool for special-shaped pipe fittings according to claim 6, characterized in that: The dimension of the end of the retracted structure (32) close to the special-shaped pipe fitting port is larger than the dimension of the end away from the special-shaped pipe fitting port, and the angle between the inner ring of the retracted structure (32) and the inner wall of the engraved ring (30) is 2-5°.

8. The thread cutting tool for special-shaped pipe fittings according to claim 1, characterized in that: The engraving ring (30) is provided with a bell mouth near the port of the special-shaped pipe fitting, and the bell mouth is used for shaping the port of the special-shaped pipe fitting.