Cold heading machining process for stainless steel fire sprinkler

Abstract

The invention discloses a cold heading processing technology of a stainless steel fire-fighting sprinkler, which comprises the following steps: (1) putting a stainless steel coiled wire material on a material rack, feeding the stainless steel coiled wire material into a line pressing wheel through an automatic straightening wheel feeder of a cold heading nut machine, heating, feeding the stainless steel coiled wire material into a machine body, and cutting the stainless steel coiled wire material into a gram weight or length required by the fire-fighting sprinkler; (2) after cutting off, feeding into a primary die by using an outer cutter holder for shaping; (3) after the first-order shaping is completed, the first-order shaping rod is overturned through a first-order mold clamp to be fed into a second-order mold shaping and shrinking rod; (4) after the second-order shaping and shrinking are completed, a second die clamp is used for horizontally moving and feeding into a third-order die for stretching a large head, and meanwhile, the shrinking rod extrudes an ear nozzle for semi-forming. A pure mechanical production process of a cold heading nut machine is adopted, the SUS304 or D665A stainless steel coiled wire material with excellent performance is perfectly manufactured into the fire sprinkler meeting the use requirement through the technological process, and meanwhile the adopted stainless steel coiled wire has good mechanical strength and corrosion resistance.

Description

Technical Field

[0001] The invention relates to the technical field of cold heading processing technology, in particular to a cold heading processing technology for a stainless steel fire sprinkler. Background Art

[0002] The traditional casting production method is accompanied by serious problems such as high energy consumption, high pollution, low production capacity and unstable quality, which are mainly manifested in the following aspects:

[0003] 1. The sand castings have sand roars and sand holes. The sand particles falling from the surface of the sand core are wrapped by the copper liquid and exist on the surface of the casting to form holes. The surface strength of the sand core is poor, it is burnt or not completely solidified. The size of the sand core does not match the outer mold. The sand core is crushed when the mold is closed. The mold is dipped in graphite contaminated with sand. The mold is dipped in graphite contaminated with sand.

[0004] 2. There are pores, bubbles, choking holes or air pockets. The main characteristics are that pores are holes on the surface or inside of the casting, which are round, oval or irregular in shape. Sometimes multiple pores form an air mass. The subcutaneous pores are generally pear-shaped.

[0005] 3. During the sand casting process, sticky sand will form on the surface or inner surface. The only way to remove the sticky sand is to soak it in strong acid. Since strong acid has many side effects, it will cause great damage to the environment, castings and people.

[0006] In order to solve the above technical problems, a cold heading process for stainless steel fire sprinklers is in urgent need of research. Summary of the invention

[0007] In order to solve the above technical problems, the technical solution provided by the present invention is: a cold heading process of a stainless steel fire sprinkler, the fire sprinkler comprises the following method steps:

[0008] (1) Put the stainless steel wire on the material rack and send it to the wire pressing wheel through the straightening wheel automatic feeder of the cold heading nut machine for heating. Then send it into the machine body and cut it into the weight or length required by the fire sprinkler.

[0009] (2) After cutting, it is fed into a first-order mold for shaping using an external tool holder;

[0010] (3) After the first-order shaping is completed, it is flipped through the first-order mold clamp and sent to the second-order mold for shaping and shrinking;

[0011] (4) After the second-order shaping and shrinking are completed, the second-order mold clamp is translated and sent to the third-order mold to stretch the big head while shrinking and squeezing the ear and mouth to form a semi-formed shape;

[0012] (5) After the three-stage stretching and extrusion of the ear and mouth is completed, the three-die clamp is translated into the four-die and stretched and shaped by a tungsten steel punch to form the hexagonal big head;

[0013] (6) After the four-sequence tungsten steel rod is stretched and shaped into the big hexagon, it is translated into the five-sequence stretching die through the four-die clamp for stretching and spraying ear forming;

[0014] (7) After the five-sequence stretching is completed, the five-die clamp is translated and sent to the six-sequence stretching die for stretching the embossed sheet for small head forming;

[0015] (8) After the sixth sequence is completed, the six-die clamp is translated and sent to the seventh sequence anti-stretching punch movable die for anti-stretching of the small head screw for semi-forming;

[0016] (9) After the small head is reverse-stretched by the seven-mold movable die, it is translated into the eight-mold movable die through the seven-mold clamp to repeat the seven-mold reverse-stretching process so that the small head screw is completely formed;

[0017] (10) After the eight-sequence tungsten steel reverse stretching movable die completes the small head stretching, it is translated to the nine-die reverse punching die through the eight-die clamp so that the waste core at the small head is moved out. At the same time, the nine-punch tube core positive die is shaped and the hexagonal forming positive die core is pushed to the spray plugging outlet to stack and shape the accumulated material.

[0018] Furthermore, the surface treatment methods of the fire sprinkler include but are not limited to sandblasting, shot blasting and electroplating, so as to improve the corrosion resistance and decorativeness of the product.

[0019] Furthermore, the equipment used in the cold heading process of stainless steel fire sprinkler is a nine-die nut machine.

[0020] The advantages of the invention compared with the prior art are:

[0021] The present invention adopts the purely mechanical production process of the cold heading nut machine, and perfectly transforms the SUS304 or D665A stainless steel wire coil material with superior performance into a fire sprinkler that meets the use requirements through the process flow. At the same time, the stainless steel wire coil used has good mechanical strength and corrosion resistance. The entire production process is more environmentally friendly, efficient, and uniform and stable in quality.

[0022] The present invention adopts sandblasting, shot blasting or electroplating on the surface of the stainless steel fire sprinkler, which can effectively improve the corrosion resistance and decorativeness of the product.

[0023] The present invention adopts the method of turning the threads at both ends of the fire sprinkler workpiece and finishing the inner frame after laser cutting, so that the workpiece can accurately meet the size requirements and meet the technical requirements of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The schematic diagram of the process flow of spray parts. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below.

[0026] The present invention is described in detail.

[0027] The present invention provides a cold heading process for a stainless steel fire sprinkler in a specific implementation. The fire sprinkler includes the following method steps:

[0028] (1) Put the stainless steel wire on the material rack and send it to the wire pressing wheel through the straightening wheel automatic feeder of the cold heading nut machine for heating. Then send it into the machine body and cut it into the weight or length required by the fire sprinkler.

[0029] (2) After cutting, it is fed into a first-order mold for shaping using an external tool holder;

[0030] (3) After the first-order shaping is completed, it is flipped through the first-order mold clamp and sent to the second-order mold for shaping and shrinking;

[0031] (4) After the second-order shaping and shrinking are completed, the second-order mold clamp is translated and sent to the third-order mold to stretch the big head while shrinking and squeezing the ear and mouth to form a semi-formed shape;

[0032] (5) After the three-stage stretching and extrusion of the ear and mouth is completed, the three-die clamp is translated into the four-die and stretched and shaped by a tungsten steel punch to form the hexagonal big head;

[0033] (6) After the four-sequence tungsten steel rod is stretched and shaped into the big hexagon, it is translated into the five-sequence stretching die through the four-die clamp for stretching and spraying ear forming;

[0034] (7) After the five-sequence stretching is completed, the five-die clamp is translated and sent to the six-sequence stretching die for stretching the embossed sheet for small head forming;

[0035] (8) After the sixth sequence is completed, the six-die clamp is translated and sent to the seventh sequence anti-stretching punch movable die for anti-stretching of the small head screw for semi-forming;

[0036] (9) After the small head is reverse-stretched by the seven-mold movable die, it is translated into the eight-mold movable die through the seven-mold clamp to repeat the seven-mold reverse-stretching process so that the small head screw is completely formed;

[0037] (10) After the eight-sequence tungsten steel reverse stretching movable die completes the small head stretching, it is translated to the nine-die reverse punching die through the eight-die clamp so that the waste core at the small head is moved out. At the same time, the nine-punch tube core positive die is shaped and the hexagonal forming positive die core is pushed to the spray plugging outlet to stack and shape the accumulated material.

[0038] As a further elaboration of the present invention, the surface treatment methods of the fire sprinkler include but are not limited to sandblasting, shot blasting and electroplating.

[0039] As a further elaboration of the present invention, the equipment used in the cold heading process of stainless steel fire sprinkler is a nine-die nut machine.

[0040] As a further elaboration of the present invention, the threads at both ends of the workpiece in the fire sprinkler and the inner frame after laser cutting are processed by precision CNC turning to meet the processing requirements.

[0041] The present invention and its implementation methods are described above, and such description is not restrictive. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design structures and embodiments similar to the technical solution without creativity, which should all fall within the protection scope of the present invention.

Claims

1. A cold heading process for stainless steel fire sprinkler, characterized in that: Fire sprinkler includes the following method steps: (1) Put the stainless steel wire on the material rack and send it to the wire pressing wheel through the straightening wheel automatic feeder of the cold heading nut machine for heating. Then send it into the machine body and cut it into the weight or length required by the fire sprinkler. (2) After cutting, it is fed into a first-order mold for shaping using an external tool holder; (3) After the first-order shaping is completed, it is flipped through the first-order mold clamp and sent to the second-order mold for shaping and shrinking; (4) After the second-order shaping and shrinking are completed, the second-order mold clamp is translated and sent to the third-order mold to stretch the big head while shrinking and squeezing the ear and mouth to form a semi-formed shape; (5) After the three-stage stretching and extrusion of the ear and mouth is completed, the three-die clamp is translated into the four-die and stretched and shaped by a tungsten steel punch to form the hexagonal big head; (6) After the four-sequence tungsten steel rod is stretched and shaped into the big hexagon, it is translated into the five-sequence stretching die through the four-die clamp for stretching and spraying ear forming; (7) After the five-sequence stretching is completed, the five-die clamp is translated and sent to the six-sequence stretching die for stretching the embossed sheet for small head forming; (8) After the sixth sequence is completed, the six-die clamp is translated and sent to the seventh sequence anti-stretching punch movable die for anti-stretching of the small head screw for semi-forming; (9) After the small head is reverse-stretched by the seven-mold movable die, it is translated into the eight-mold movable die through the seven-mold clamp to repeat the seven-mold reverse-stretching process so that the small head screw is completely formed; (10) After the eight-sequence tungsten steel reverse stretching movable die completes the small head stretching, it is translated to the nine-die reverse punching die through the eight-die clamp so that the waste core at the small head is moved out. At the same time, the nine-punch tube core positive die is shaped and the hexagonal forming positive die core is pushed to the spray plugging outlet to stack and shape the accumulated material.

2. The cold heading process of a stainless steel fire sprinkler according to claim 1, characterized in that: The surface treatment methods of the fire sprinkler include but are not limited to sand blasting, shot blasting and electroplating.

3. The cold heading process of a stainless steel fire sprinkler according to claim 1, characterized in that: The equipment used in the cold forging process of stainless steel fire sprinkler is a nine-die nut machine.

4. The cold heading process of a stainless steel fire sprinkler according to claim 1, characterized in that: The threads at both ends of the workpiece in the fire sprinkler and the inner frame after laser cutting are processed by precision CNC turning to meet the processing requirements.

Images