Continuous automatic production method for harness wires

Abstract

The invention discloses a harness wire continuous automatic production method, which belongs to the technical field of harness wire production, and comprises the following steps: S1, unwinding and straightening a strip: continuously unwinding a metal strip coil and carrying out high-precision straightening to enable the straightness of an unwound blank to meet a preset requirement; s2, continuous heat treatment is conducted, specifically, the blank straightened in the step S1 is dragged and guided into a closed continuous heat treatment channel; the heat treatment channel sequentially comprises a preheating section, a heating section and a heat treatment section, wherein the preheating section is used for heating a blank to a first preset temperature at a constant speed under a protective atmosphere; step quenching: transferring the blank into a quenching medium tank for step quenching, cooling the blank in quenching oil in a first temperature interval, and then transferring the blank into cooling liquid in a second temperature interval to finish final quenching; a continuous tempering section: carrying out continuous tempering treatment on the quenched harness wire in a protective atmosphere; the problems that a traditional intermittent process is low in efficiency, poor in consistency and prone to deformation are solved.

Description

Technical Field

[0001] This invention relates to a continuous automated production method for heddles, belonging to the field of heddle production technology. Background Technology

[0002] Currently, the traditional production method of heddle wire generally adopts a multi-stage, intermittent production process. First, the metal strip needs to be cut into individual blanks. Then, these discrete blanks are heat-treated and surface-treated one by one. Finally, they are formed into heddle wire products with heddle eyes and specific contours through stamping or other processing methods. A search revealed that Chinese patent CN121198826A discloses a method for producing high-wear-resistant metal / plastic composite heddles for high-speed jacquard looms. The steps include preparing and demagnetizing stainless steel wire, stamping to form heddle eyes, deburring and polishing the heddle eyes, and finally injection molding with plastic parts. The core of the process lies in the treatment of the formed stainless steel parts, especially the heddle eyes, and the composite technology of metal and plastic. However, this production method is essentially a step-by-step, intermittent processing flow. Manual transfer and repositioning are required between each process, resulting in low production efficiency, high labor intensity, and difficulty in achieving full automation. Furthermore, the quenching process uses a single medium, which is not adaptable to changes in strip thickness and material, and is prone to problems such as heddle deformation, cracking, or substandard performance. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a continuous automated production method for heddles, which solves the problems of low efficiency, poor consistency and easy deformation of the traditional intermittent process.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is: a continuous automated production method for heddles, characterized by comprising the following steps: S1. Strip unwinding and straightening: The metal strip is continuously unwound and straightened with high precision so that the flatness of the unwound blank meets the preset requirements. S2, Continuous heat treatment: The straightened blank from step S1 is drawn into a closed continuous heat treatment channel. The heat treatment channel includes, in sequence: Preheating section: Under a protective atmosphere, the blank is heated at a uniform speed to the first predetermined temperature; Graded quenching section: The blank is transferred to the quenching medium tank for graded quenching. It is first cooled in the quenching oil in the first temperature range, and then transferred to the coolant in the second temperature range to complete the final quenching. Continuous tempering section: Under a protective atmosphere, the quenched heath wire is subjected to continuous tempering treatment; S3. Online surface treatment and inspection: Continuous surface treatment is performed on the blank after the heat treatment in step S2; S4. Blanking and forming: The blank in step S3 is punched and the outer contour is blanked simultaneously through an integrated mold to form a heddle wire with heddle eye and end structure. S5. Polishing: Polish the heddle wire from step S4 using a grinding wheel. S6. Sorting and Collection: The heddles from step S4 are collected into groups using an external collection device.

[0005] Furthermore, in step S2, the relative position between the punching punch and the cutting edge of the integrated mold has a fine-tuning function.

[0006] Furthermore, in step S2, the first predetermined temperature is 780℃–860℃.

[0007] Furthermore, the quenching oil temperature in the first temperature range is 80℃-120℃, and the cooling time is T1 seconds.

[0008] Furthermore, the coolant in the second temperature range is an aqueous polymer solution with a temperature of 20°C-40°C and a cooling time of T2 seconds; Where T1 / T2 = K*(strip thickness / strip width), K is a material-related constant.

[0009] Furthermore, in step S5, the grinding wheel mesh size is 800 to 1500.

[0010] Furthermore, the aqueous polymerization solution comprises: 5%-25% polyalkylene glycol polymers, 0.1%-1.5% rust inhibitors and 0.05%-0.5% defoamers, with the balance being water.

[0011] Furthermore, in step S4, the heddle wires after punching and forming need to be cleaned. A pH-neutral water-based cleaning agent is used for cleaning, the temperature is controlled at 40℃-60℃, and the cleaning time is 30 seconds to 2 minutes.

[0012] By adopting the above technical solution, the present invention has the following beneficial effects: 1. In this invention, the production method achieves high-efficiency and low-cost continuous production. By integrating key processes such as strip unwinding, continuous heat treatment, online surface treatment, and punching into an uninterrupted automated production line, it eliminates the frequent material transfer, positioning waiting and manual intervention in traditional multi-process intermittent production, greatly improves production efficiency, reduces the number of work-in-process and space occupation, and significantly reduces production costs and labor intensity. The continuous heat treatment conducted in a closed channel and under a protective atmosphere ensures that the process parameters of the blank are highly uniform and controllable during heating, holding and cooling. This avoids product performance fluctuations caused by differences in furnace temperature, different workpiece positions or inconsistent transfer timing in traditional batch processing methods, thereby ensuring high uniformity and reliability of each heddle wire in key indicators such as hardness, toughness and wear resistance.

[0013] 2. In this invention, the graded quenching process involves first slow cooling in medium-temperature (80℃-120℃) oil, and then final cooling in a low-temperature (20℃-40℃) aqueous polymer solution. This significantly reduces thermal stress and structural stress, thereby effectively suppressing deformation and cracking tendencies during the quenching process and improving the product yield and dimensional accuracy. The integrated mold used in the blanking and forming station can simultaneously complete the punching (heald eye) and outer contour blanking, ensuring the relative positional accuracy between the hole and the shape. At the same time, the punching punch and the outer shape cutting edge have a fine adjustment function, which can compensate for the slight deviation caused by mold wear or process fluctuations, further ensuring the accuracy of the heald wire, especially the size and position of the key heald eye, and meeting the high precision requirements of high-speed looms for heald wire accessories.

[0014] 3. In this invention, the polishing process in step S5 can effectively remove the oxide layer or micro-defects generated by heat treatment and obtain a good surface finish.

[0015] Adding a pH-neutral water-based cleaning process after stamping can thoroughly remove stamping oil and metal shavings, ensuring product cleanliness and providing a good foundation for subsequent plating or direct use. Attached Figure Description

[0016] Figure 1 This table compares heddles produced using the continuous automated heddles production method of this invention with those produced using conventional methods. Detailed Implementation

[0017] This invention provides a method for continuous automated production of heddles. Those skilled in the art can refer to the content of this document and appropriately modify the process parameters to achieve the desired result. It should be particularly noted that all similar substitutions and modifications are obvious to those skilled in the art and fall within the scope of protection of this invention. The method and application of this invention have been described through preferred embodiments. Those skilled in the art can clearly modify or appropriately change and combine the method and application described herein without departing from the content, spirit, and scope of this invention to implement and apply the technology of this invention.

[0018] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments.

[0019] like Figure 1 As shown, a continuous automated production method for heddles includes the following steps: S1. Strip unwinding and straightening: The metal strip is continuously unwound and straightened with high precision so that the flatness of the unwound blank meets the preset requirements. In this embodiment, a multi-roll straightener is used in step S1 to repeatedly bend the strip by staggered straightening rollers, eliminating internal curling stress, longitudinal bending and transverse bending, thereby obtaining a strip blank with high flatness.

[0020] S2, Continuous heat treatment: The straightened blank from step S1 is drawn into a closed continuous heat treatment channel. The heat treatment channel includes, in sequence: Preheating section: Under a protective atmosphere, the blank is heated at a uniform speed to the first predetermined temperature; Graded quenching section: The blank is transferred to the quenching medium tank for graded quenching. It is first cooled in the quenching oil in the first temperature range, and then transferred to the coolant in the second temperature range to complete the final quenching. Continuous tempering section: Under a protective atmosphere, the quenched heath wire is subjected to continuous tempering treatment; The protective atmosphere is nitrogen or a nitrogen-hydrogen mixture, which can effectively prevent the strip surface from oxidizing and decarburizing at high temperatures, maintain surface smoothness and compositional stability, and heat to the first predetermined temperature at a uniform rate to make the material structure transform uniformly.

[0021] S3. Online surface treatment and inspection: Continuous surface treatment is performed on the blank after the heat treatment in step S2; S4. Blanking and forming: The blank in step S3 is punched and the outer contour is blanked simultaneously through an integrated mold to form a heddle wire with heddle eye and end structure. S5. Polishing treatment: Polish the heddle wires in step S4 using a grinding wheel; S6. Sorting and Collection: The heddles from step S4 are collected into groups using an external collection device.

[0022] Specifically, in step S2, the relative position between the punching punch and the cutting edge of the integrated mold has a fine-tuning function.

[0023] Specifically, in step S2, the first predetermined temperature is 780℃–860℃.

[0024] Specifically, the quenching oil temperature in the first temperature range is 80℃-120℃, and the cooling time is T1 seconds.

[0025] Specifically, the coolant in the second temperature range is an aqueous polymer solution with a temperature of 20°C-40°C and a cooling time of T2 seconds; Where T1 / T2 = K*(strip thickness / strip width), K is a material-related constant.

[0026] Specifically, the grinding wheel mesh size is between 800 and 1500.

[0027] Specifically, the aqueous polymerization solution comprises: 5%-25% polyalkylene glycol polymer, 0.1%-1.5% rust inhibitor and 0.05%-0.5% defoamer, with the balance being water.

[0028] Specifically, in step S4, the heddle wires after punching and forming need to be cleaned. A pH-neutral water-based cleaning agent is used for cleaning, the temperature is controlled at 40℃-60℃, and the cleaning time is 30 seconds to 2 minutes to remove impurities and residues generated during the surface treatment process, ensuring the cleanliness of the heddle wire surface and the smooth progress of subsequent processing.

[0029] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A continuous automated production method for heddles, characterized in that, Includes the following steps: S1. Strip unwinding and straightening: The metal strip is continuously unwound and straightened with high precision so that the flatness of the unwound blank meets the preset requirements. S2, Continuous heat treatment: The straightened blank from step S1 is drawn into a closed continuous heat treatment channel. The heat treatment channel includes, in sequence: Preheating section: Under a protective atmosphere, the blank is heated at a uniform speed to the first predetermined temperature; Graded quenching section: The blank is transferred to the quenching medium tank for graded quenching. It is first cooled in the quenching oil in the first temperature range, and then transferred to the coolant in the second temperature range to complete the final quenching. Continuous tempering section: Under a protective atmosphere, the quenched heath wire is subjected to continuous tempering treatment; S3. Online surface treatment and inspection: Continuous initial surface treatment is performed on the blank after heat treatment in step S2; S4. Blanking and forming: The blank in step S3 is punched and the outer contour is blanked simultaneously through an integrated mold to form a heddle wire with heddle eye and end structure. S5. Polishing treatment: Polish the heddle wires in step S4 using a grinding wheel; S6. Sorting and Collection: The heddles from step S4 are collected into groups using an external collection device.

2. The continuous automated production method for heddles according to claim 1, characterized in that: In step S2, the relative position between the punching punch and the cutting edge of the integrated mold has a fine-tuning function.

3. The continuous automated production method for heddles according to claim 1, characterized in that: In step S2, the first predetermined temperature is 780℃–860℃.

4. The continuous automated production method for heddles according to claim 1, characterized in that: The quenching oil temperature in the first temperature range is 80℃-120℃, and the cooling time is T1 seconds.

5. The continuous automated production method for heddles according to claim 4, characterized in that: The coolant in the second temperature range is an aqueous polymer solution with a temperature of 20℃-40℃ and a cooling time of T2 seconds; Where T1 / T2 = K*(strip thickness / strip width), K is a material-related constant.

6. The continuous automated production method for heddles according to claim 1, characterized in that: In step S5, the grinding wheel mesh size is 800 to 1500.

7. The continuous automated production method for heddles according to claim 1, characterized in that: The aqueous polymerization solution comprises: 5%-25% polyalkylene glycol polymer, 0.1%-1.5% rust inhibitor and 0.05%-0.5% defoamer, with the balance being water.

8. The continuous automated production method for heddles according to claim 1, characterized in that: In step S4, the heddle wires after punching and forming need to be cleaned. A pH-neutral water-based cleaning agent is used for cleaning, the temperature is controlled at 40℃-60℃, and the cleaning time is 30 seconds to 2 minutes.

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