An apparatus for electrically fusing a saddle pipe fitting wire board wiring

Abstract

This utility model discloses a device for wiring on an electrofusion saddle-shaped pipe fitting, including a clamp and a cutting tool. The clamp includes a clamp body, a positioning circular step, a positioning block, a positioning pressure plate, and a quick-clamping mechanism. The clamp body has a positioning circular step at its center, a positioning block on its upper part, and positioning pressure plates symmetrically arranged on both sides of the clamp body. The positioning pressure plates are connected to the quick-clamping mechanism. The cutting tool includes a cutting rod, a cutting head, a cutting tip, and a bearing. The cutting head is fixed to the front end of the cutting rod, and the front end of the cutting head has a cutting tip, a wire-passing hole, and a bearing. The cutting tip is located above the bearing, and the wire-passing hole is located between the cutting tip and the bearing. This utility model offers high positioning accuracy, uniform wiring depth, and reduces the risk of wire slippage. The wiring depth of the resistance wire on the circuit board is precisely controllable, resulting in more reliable welding quality. It not only reduces the wiring difficulty of the circuit board but also lowers injection molding requirements, making circuit board fixation more convenient and reliable, and significantly improving production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of electrofusion saddle-shaped pipe processing technology, and in particular to a device for wiring of electrofusion saddle-shaped pipes. Background Technology

[0002] Saddle-shaped pipe fittings feature a curved welding surface with embedded resistance wire. During installation, external loads or self-locking clamping devices ensure a tight fit between the curved surface and the pipe. When energized, the resistance wire heats up, achieving fusion between the fitting and the pipe.

[0003] Process Classification and Characteristics: Based on the order in which the resistance wire is embedded, the process can be divided into three types: pre-embedded wiring and post-embedded wiring. 1. Process flow of front wiring process: ① Injection molding of plastic substrate with spiral groove → ② Arrange resistance wires according to the direction of the groove → ③ Heat the groove with a special hot melt welding head to fix the resistance wire → ④ Place the substrate with wire into the mold for secondary injection molding of the tube.

[0004] Technical bottlenecks: ① Insufficient heating and fixation of the resistance wire can easily lead to wire detachment (pass rate ≤60%); ② The wire groove structure restricts the flow of molten material, making injection molding difficult; ③ Redundant substrate thickness leads to excessive wire embedding, affecting welding heat conduction and causing welding failure.

[0005] 2. Post-wiring process flow 1: ① Injection molding of tube blank → ② Precision machining of welded arc surface on multi-axis lathe → ③ Multi-axis wiring machine embeds resistance wire on the surface of arc surface.

[0006] Technical drawbacks: ① Relies on high-precision multi-axis equipment (single machine cost of over 150,000 yuan); ② Exposed resistance wire requires an additional protective layer, resulting in high process complexity.

[0007] 3. Existing post-wiring process flow 2: ① Injection molding of tube blank thin wire plate → ② Fixing the wire plate on the lathe chuck (fixed by positioning pin) → ③ Pressing the wire plate with spring stop, machining the groove trajectory on the lathe, and embedding the resistance wire in the groove of the lathe at the same time.

[0008] Technical defects: ① The shrinkage of the PE blank wire plate causes a large positional offset, resulting in insufficient repeatability and positioning accuracy; ② The clamping mechanism cannot overcome the warping of the wire plate, resulting in uneven wiring depth and easy wire slippage. Utility Model Content

[0009] To address the aforementioned issues, this utility model aims to provide a device for wiring of wire plates in electrofusion saddle-shaped pipe fittings, thereby solving problems such as wire detachment and excessive wiring depth in wire plate wiring during the production of wire plate wiring processes, improving product wiring efficiency and pass rate, accurately controlling wiring depth, and improving product quality.

[0010] The technical problem solved by this utility model can be achieved by the following technical solution: A device for wiring of electrofusion saddle-shaped pipe fittings includes a clamp and a cutting tool. The clamp includes a clamp body, a positioning circular step, a positioning block, a positioning pressure plate, and a quick clamping mechanism. The center of the clamp body is provided with a positioning circular step, the upper part of the clamp body is provided with a positioning block, and the two sides of the clamp body are symmetrically provided with positioning pressure plates. The positioning pressure plates are connected to the quick clamping mechanism. The cutting tool includes a cutting rod, a cutting head, a cutting tip, and a bearing. The cutting head is fixed to the front end of the cutting rod, and the front end of the cutting head is provided with a cutting tip, a wire hole, and a bearing.

[0011] The blade tip is located above the bearing, and the wire hole is located between the blade tip and the bearing. A wire hole is provided directly below the blade tip, and a resistance wire is threaded through the wire hole. The surface of the bearing is in close contact with the area below the wire hole.

[0012] The blade tip is triangular, and the width of the tail of the blade tip is greater than the diameter of the resistance wire.

[0013] The cutter head is fixed to the cutter shank by fixing screws. The cutter head is provided with a bearing retaining pin, and the bearing is mounted on the bearing retaining pin.

[0014] The positioning circular step is connected to the circular hole in the center of the saddle piece, the upper edge of the saddle piece abuts against the positioning block, and the two sides of the saddle piece are clamped to the fixture body by positioning pressure plates.

[0015] The quick clamping mechanism includes a clamping rod, a hinge seat, a connecting shaft, and a protrusion. The protrusion is located on the rear side of the fixture body. The two ends of the hinge seat are respectively hinged to the protrusion and the clamping rod. The head of the connecting shaft is fixedly connected to the positioning pressure plate. The connecting shaft passes through the fixture body and the protrusion, and the tail end of the connecting shaft is hinged to the clamping rod.

[0016] Compared with existing technologies, this invention offers the following advantages: Using this wiring device, the wire board does not require pre-fabricated spiral grooves. The wiring pitch of the resistance wire is adjusted via a CNC lathe, solving the problems of significant positional offset due to PE blank wire board shrinkage, insufficient repeatability, wire board warping, uneven wiring depth, and wire slippage. The wiring depth of the resistance wire on the wire board is precisely controllable, resulting in more reliable welding quality. This not only reduces the wiring difficulty of the wire board but also lowers injection molding requirements, making wire board fixing more convenient and reliable, and significantly improving production efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 This is a schematic diagram of the structure of the cutting tool of this utility model; Figure 4 This is a schematic diagram of the structure of this utility model; Figure 5 This is a schematic diagram of the saddle plate structure; In the diagram: 1-tool holder; 2-tool head; 3-positioning block; 4-fixing bolt; 5-saddle plate; 6-positioning pressure plate; 7-clamp body; 8-quick clamping mechanism; 9-bearing; 10-bearing fixing pin; 11-fixing screw; 12-tool tip; 13-positioning circular step; 81-protrusion; 82-hinge seat; 83-clamping rod; 84-connecting shaft. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0019] In the description of this utility model, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] Combined with appendix Figures 1 to 5 As shown, this embodiment discloses a device for wiring of electrofusion saddle-shaped pipe fittings, including a clamp and a cutting tool. The clamp includes a clamp body 7, a positioning circular step 13, positioning blocks 3, positioning pressure plates 6, and a quick clamping mechanism 8. The clamp body 7 has a positioning circular step 13 at its center. The upper part of the clamp body 7 has two positioning blocks 3. The two sides of the clamp body 7 are symmetrically arranged with positioning pressure plates 6, and the positioning pressure plates 6 are connected to the quick clamping mechanism 8.

[0021] The positioning circular step 13 is connected to the circular hole in the center of the saddle piece 5. The upper edge of the saddle piece 5 abuts against the positioning block 3. The two sides of the saddle piece 5 are clamped to the fixture body 7 by positioning pressure plates 6. The saddle piece 5 is made of PE material. The positioning circular step 13 of the fixture body 7 is used for positioning the central axis of the saddle piece 5. The positioning block 3 limits the saddle piece 5 to prevent it from rotating after it is fixed. There is a pair of positioning pressure plates 6 on each side of the fixture body 7, which are fixed by a quick clamping mechanism 8 to prevent warping of the wire board during the wiring process and to achieve complete fixation.

[0022] The quick clamping mechanism 8 includes a clamping rod 83, a hinge seat 82, a connecting shaft 84, and a protrusion 81. The protrusion 81 is located on the rear side of the fixture body 7. The two ends of the hinge seat 82 are respectively hinged to the protrusion 81 and the clamping rod 83. The head of the connecting shaft 84 is fixedly connected to the positioning pressure plate 6. The connecting shaft 84 passes through the fixture body 7 and the protrusion 81. The tail end of the connecting shaft 84 is hinged to the clamping rod 83. When fixing the saddle piece 5, move the saddle piece 5 from below the clamp body 7 upward and place it between the clamp body 7 and the positioning plate 6 until the upper edge of the saddle piece 5 contacts the positioning block 3. Then, make the through hole of the saddle piece 5 cooperate with the positioning circular step 13 and make the saddle piece 5 fit against the front surface of the clamp body 7. Then, rotate the clamping rod 83 of the quick clamping mechanism 8 outward, and the connecting shaft 84 drives the positioning plate 6 to move closer to the clamp body 7 to clamp and fix the saddle piece 5 on the clamp body 7.

[0023] The cutting tool includes a tool holder 1, a cutting head 2, a cutting tip 12, and a bearing 9. The cutting head 2 is fixed to the front end of the tool holder 1, and the front end of the cutting head 2 is provided with a cutting tip 12, a threading hole, and a bearing 9. The cutting head 2 is fixed to the tool holder 1 by a fixing screw 4. A bearing fixing pin 10 is provided on the cutting head 2, and the bearing 9 is installed on the bearing fixing pin 10.

[0024] The blade tip 12 is used to cut grooves on the smooth surface of the saddle piece 5 to embed a resistance wire. The blade tip 12 is triangular, and the width of the tail of the blade tip 12 is greater than the diameter of the resistance wire. The blade tip 12 is located above the bearing 9, and the wire-passing hole is located between the blade tip 12 and the bearing 9. A wire-passing hole is provided directly below the blade tip 12, and the resistance wire is passed through the wire-passing hole. The wire-passing hole is at a certain angle to the bearing surface to guide the resistance wire into the groove. The surface of the bearing 9 is in close contact with the area below the wire-passing hole. After the resistance wire falls into the groove of the saddle piece 5, the plastic flanges on both sides of the groove are promptly pressed back to ensure that the resistance wire is embedded and fixed inside the groove.

[0025] The wiring device is installed on a CNC machine tool. Using this device, the wire board does not require pre-fabricated spiral grooves. The wiring pitch of the resistance wire is adjusted via a CNC lathe, solving the problems of large positional offsets due to PE blank wire board shrinkage, insufficient repeatability, wire board warping, uneven wiring depth, and wire slippage. The wiring depth of the resistance wire on the wire board is precisely controllable, resulting in more reliable welding quality. This not only reduces the wiring difficulty of the wire board but also lowers injection molding requirements, making wire board fixing more convenient and reliable, and significantly improving production efficiency.

[0026] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the utility model. Any simple modifications, equivalent changes, or alterations made to the above embodiments based on the technical principles of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. An apparatus for wiring on an electrofusion saddle-shaped tubular fitting, comprising a clamp and a cutting tool, characterized in that: The fixture includes a fixture body (7), a positioning circular step (13), a positioning block (3), a positioning pressure plate (6), and a quick clamping mechanism (8). The fixture body (7) has a positioning circular step (13) at its center. The fixture body (7) has a positioning block (3) at its upper part. The fixture body (7) has positioning pressure plates (6) symmetrically arranged on both sides. The positioning pressure plates (6) are connected to the quick clamping mechanism (8). The cutting tool includes a cutting rod (1), a cutting head (2), a cutting tip (12), and a bearing (9). The cutting head (2) is fixed to the front end of the cutting rod (1). The front end of the cutting head (2) has a cutting tip (12), a wire hole, and a bearing (9).

2. The device for wiring of electrofusion saddle-shaped tubular fittings according to claim 1, characterized in that: The blade tip (12) is located above the bearing (9), and the wire hole is located between the blade tip (12) and the bearing (9). A wire hole is provided directly below the blade tip (12), and a resistance wire is threaded through the wire hole. The surface of the bearing (9) is in close contact with the bottom of the wire hole.

3. The device for wiring of electrofusion saddle-shaped tubular fittings according to claim 1, characterized in that: The blade tip (12) is triangular, and the width of the tail of the blade tip (12) is greater than the diameter of the resistance wire.

4. The device for wiring of electrofusion saddle-shaped tubular fittings according to claim 1, characterized in that: The cutter head (2) is fixed to the cutter bar (1) by a fixing screw (4).

5. The apparatus for wiring of electrofusion saddle-shaped tubular fittings according to claim 1, characterized in that: The cutter head (2) is provided with a bearing fixing pin (10), and the bearing (9) is installed on the bearing fixing pin (10).

6. The apparatus for wiring of electrofusion saddle-shaped tubular fittings according to claim 1, characterized in that: The positioning circular step (13) is connected to the circular hole in the center of the saddle piece (5), the upper edge of the saddle piece (5) abuts against the positioning block (3), and the two sides of the saddle piece (5) are clamped on the fixture body (7) by the positioning pressure plate (6).

7. The apparatus for wiring of electrofusion saddle-shaped tubular fittings according to claim 1, characterized in that: The quick clamping mechanism (8) includes a clamping rod (83), a hinge seat (82), a connecting shaft (84), and a protrusion (81). The protrusion (81) is located on the rear side of the fixture body (7). The two ends of the hinge seat (82) are respectively hinged to the protrusion (81) and the clamping rod (83). The head of the connecting shaft (84) is fixedly connected to the positioning pressure plate (6). The connecting shaft (84) passes through the fixture body (7) and the protrusion (81). The tail end of the connecting shaft (84) is hinged to the clamping rod (83).

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