Machining device and process for sliding key type steel for automobile

Abstract

The invention provides a machining device and technology for sliding key profile steel for an automobile, and belongs to the technical field of profile steel machining. The machining device comprises a machine body, a chain driving mechanism is arranged in the machine body, a traveling crane is arranged at the top of the machine body, a clamping mechanism for clamping a workpiece is arranged at the top of the traveling crane, a collecting box is fixedly connected to one end of the machine body, a mold and a cleaning assembly are installed in the collecting box, and the cleaning assembly is used for cleaning impurities outside the workpiece. And the cleaning assembly is connected with the annular ring. Through the arranged cleaning assembly, oxides and other impurities outside a workpiece can be effectively cleaned in the feeding process of the workpiece, the traditional impurity removal procedure can be optimized, the workpiece drawing efficiency is remarkably improved, the lubricating assembly is arranged at the rear end of the cleaning assembly, the lubricating assembly can spray a lubricating agent to the exterior of the workpiece in all directions, and the workpiece drawing efficiency is improved. And therefore, the drawing smoothness of the workpiece is enhanced, and the surface quality and precision of the drawn workpiece are improved.

Description

Technical Field

[0001] This invention relates to the field of profile steel processing technology, and in particular to a processing device and process for automotive sliding key profile steel. Background Technology

[0002] As a core component connecting the car door to the car body, the car door hinge bears the important mission of supporting the door and ensuring its smooth opening and closing. Its performance directly affects the safety, comfort, and sealing of the car door. Given that car door hinges need to adapt to diverse installation and usage scenarios, some door hinges need to be processed into irregular columnar structures. To improve processing efficiency, round steel is usually drawn multiple times using a cold drawing machine, and heat treatment is carried out after each drawing to ensure that the formed car door hinge has sufficient structural strength.

[0003] However, after heat treatment, oxides will adhere to the surface of the workpiece. If not treated, the impurities adhering to the outside of the workpiece during the cold drawing process will not only shorten the service life of the cold drawing die, but also cause scratches, pits and other defects on the product surface, thereby reducing the surface quality and precision of the product. At present, the surface treatment of workpieces is mostly carried out by sandblasting, shot blasting or pickling. However, the above treatment methods all require external equipment, which makes the workpiece processing process complicated and costly. Summary of the Invention

[0004] This invention provides a processing device and process for automotive sliding key steel, which solves the problem that existing cold drawing machines do not have the function of cleaning the outer surface of the workpiece, resulting in a complex workpiece processing flow and high cost.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A processing device for automotive sliding key steel includes a machine body, a chain drive mechanism inside the machine body, a traveling crane on the top of the machine body, a clamping mechanism for holding the workpiece on the top of the traveling crane, a collection box fixedly connected to one end of the machine body, a mold installed inside the collection box, and an annular ring installed inside the collection box; a cleaning component for cleaning impurities on the exterior of the workpiece, the cleaning component being connected to the annular ring; and a lubrication component for providing all-around lubrication to the exterior of the workpiece, the lubrication component being connected to the cleaning component.

[0006] Optionally, the cleaning component includes mounting cavities equidistantly disposed inside the annular ring, an outer tube fixedly connected inside the mounting cavity, a valve stem slidably connected inside the outer tube, and a cleaning brush mounted on one end of the valve stem through the annular ring.

[0007] Optionally, an airbag is fixedly connected to the inner side of the outer tube, the inner wall of the airbag is in contact with the valve stem, and slots for air intake and exhaust are provided at equal intervals inside the outer tube and on the outer side of the airbag.

[0008] Optionally, a sealing piston is fitted onto the end of the valve stem away from the cleaning brush, and a spring is fitted onto the outside of the valve stem between the outer tube and the sealing piston.

[0009] Optionally, a first air chamber is provided inside the annular ring, and a plurality of first through holes are provided at equal intervals inside the annular ring and between the first air chamber and the mounting cavity. A first air supply channel is provided inside the annular ring to connect the first air chamber with the outside.

[0010] Optionally, a second air chamber is provided inside the annular ring, and a plurality of second through holes are provided at equal intervals inside the annular ring and between the second air chamber and the mounting cavity. A second air supply channel is provided inside the annular ring to connect the second air chamber with the outside.

[0011] Optionally, the cleaning assembly includes a connecting bracket mounted on the valve stem, with an annular soft bag installed at one end of the connecting bracket away from the valve stem, and a plurality of nozzles evenly spaced on the inner ring of the annular soft bag.

[0012] Optionally, the valve stem has an annular mounting groove inside, and one end of the connecting frame is provided with an open clamp, which is fitted inside the mounting groove.

[0013] Optionally, the annular soft bag has symmetrically arranged insertion parts on its outer side, and a skeleton is installed inside the insertion parts. The connecting frame has symmetrically arranged slots inside, and the skeleton is inserted into the slots.

[0014] The present invention also provides a processing method using the above-mentioned processing apparatus for automotive sliding key steel, comprising the following steps: S1. Select mold 103 according to workpiece specifications and processing requirements. Use the feeding mechanism to pass the end of the workpiece through the center of the annular ring 2 and pre-position it at the entrance of mold 103. S2. High-pressure gas is introduced into the annular ring 2 to drive the cleaning component to work; S21, First stage: High-pressure gas drives the annularly distributed cleaning units to contract radially, achieving full coverage of the workpiece; S22, Second stage: Locking the position of the cleaning unit using high-pressure gas; S3. Start the lubrication assembly: Spray lubricant onto the outer wall of the workpiece through the lubrication assembly; S4. Start the chain drive mechanism to pull the lubricated workpiece through the processing area at a uniform speed, and complete the cold drawing plastic deformation through the mold 103; S5. Place the cold-drawn and shaped workpiece in an annealing furnace for annealing treatment. S6. Repeat steps S1-S5 until the workpiece is drawn to the required size, shape, precision and surface finish.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, the processing device, through the cleaning component, can effectively clean the oxides and other impurities on the outside of the workpiece during the feeding process, which can optimize the traditional impurity removal process and significantly improve the workpiece drawing efficiency. Furthermore, a lubrication component is provided at the rear end of the cleaning component, which can spray lubricant to the outside of the workpiece in all directions, thereby enhancing the smoothness of workpiece drawing and improving the surface quality and precision of the workpiece after drawing.

[0016] The cleaning assembly consists of multiple independently adjustable cleaning brushes. Air pressure can be used to move the valve stem, or the valve stem can be fixed in place with the help of an airbag. This allows for adjustment and fixation of the cleaning brush position, ensuring that the cleaning brush fits tightly against irregularly shaped workpieces. At the same time, the cleaning brush will expand outward when pressed, thereby filling the gaps between the multiple cleaning brushes and achieving all-round wrapping of the workpiece, ensuring comprehensive cleaning.

[0017] Depending on the shape of the workpiece and the usage requirements, multiple connecting brackets can be installed between the valve stem and the annular soft bag. These connecting brackets not only support the annular soft bag but also move synchronously with the valve stem, thereby changing the shape of the annular soft bag and bringing its nozzle closer to the groove of the workpiece, ensuring comprehensive lubrication of the workpiece. Attached Figure Description

[0018] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0019] Figure 1 This is a three-dimensional structural diagram of a cold drawing machine; Figure 2 A schematic diagram showing the connection between the mold, the ring, and the collection box; Figure 3 This is a schematic diagram of the internal structure of the ring. Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram showing the connection between the outer tube and the valve stem; Figure 6 This is a schematic diagram showing the distribution of the mounting cavities inside the annular ring. Figure 7 for Figure 6 Enlarged view of point B in the middle; Figure 8 This is a schematic diagram showing the second air supply channel and the second air chamber inside the annular ring. Figure 9 for Figure 8 Enlarged view of point C in the middle; Figure 10 This is a schematic diagram showing the connection between the connecting bracket and the valve stem; Figure 11 This is a three-dimensional structural diagram of the connecting frame; Figure 12 This is a schematic diagram of the three-dimensional structure of a ring-shaped soft bag; Figure 13 This is a schematic diagram showing the connection between the connecting frame and the ring-shaped soft bag; Figure 14 This is a frontal view of the workpiece during machining. Figure 15 This is a schematic diagram showing the connection between the valve stem and the connecting bracket.

[0020] Figure label: 1. Body; 101. Crane; 102. Collection box; 103. Mold; 2. Annular ring; 201. Mounting cavity; 202. Outer tube; 203. Valve stem; 204. Airbag; 205. Spring; 206. Cleaning brush; 207. First air chamber; 208. First air supply channel; 209. First through hole; 210. Second air supply channel; 211. Second air chamber; 212. Second through hole; 3. Connecting frame; 301. Open-type clamp; 302. Slot; 303. Annular soft bag; 304. Insertion part; 305. Frame.

[0021] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0022] The following is a detailed description of a processing apparatus for automotive sliding key steel provided by the present invention, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0023] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0024] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0025] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0026] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0027] like Figures 1 to 10 As shown, an embodiment of the present invention provides a processing device for automotive sliding key steel, including a body 1. A chain drive mechanism is installed inside the body 1. A traveling trolley 101 is installed on the top of the body 1. A clamping mechanism for holding the workpiece is provided on the top of the traveling trolley 101. The traveling trolley 101 can move on the top of the body 1, thereby driving the clamping mechanism closer to the mold 103 for convenient clamping of the workpiece. A hook plate is also provided on the traveling trolley 101, which can hook onto the chain on the chain drive mechanism, thereby driving the hook plate and the traveling trolley 101 when the chain drive mechanism is working. The machine body 1 is fixedly connected to a collection box 102 at one end. The collection box 102 can collect the sprayed lubricant, which not only prevents the lubricant from dripping into the working area, but also facilitates recycling. A mold 103 is installed inside the collection box 102. The mold 103 is installed on the collection box 102 by plugging and unplugging. Bolts connected to the annular ring 2 are provided inside the mold 102. A hook is provided on the top to facilitate fixing and transporting the collection box 102. The annular ring 2 is installed inside the collection box 102.

[0028] The processing device also includes a cleaning component, which is used to clean impurities from the outside of the workpiece. The cleaning component is connected to the annular ring 2 and is located inside the annular ring 2. It can effectively clean oxides and other impurities from the outside of the workpiece during the feeding process, which can significantly improve the drawing efficiency of the workpiece. A lubrication component is used to lubricate the outside of the workpiece in all directions. The lubrication component is connected to the cleaning component and can spray lubricant onto the outside of the workpiece in all directions, which can enhance the smoothness of the workpiece drawing and improve the surface quality and precision of the workpiece after drawing.

[0029] like Figures 3 to 5 As shown, the cleaning component includes mounting cavities 201 equidistantly spaced inside the annular ring 2. An outer tube 202 is fixedly connected inside the mounting cavity 201. The outer tube 202 is connected to the mounting cavity 201 by a thread, and a nut is fixedly provided on the outside of the outer tube 202 to facilitate the assembly and disassembly of the outer tube 202 and the mounting cavity 201. A valve stem 203 is slidably connected inside the outer tube 202. One end of the valve stem 203 passes through the annular ring 2 and is fitted with a cleaning brush 206. The cleaning brush 206 is connected to the valve stem 203 by bolts, which facilitates its independent replacement. The bristles of the cleaning brush 206 are made of metal, which can improve its service life and ensure the cleaning effect on the external impurities of the workpiece.

[0030] An air bladder 204 is fixedly connected to the inner side of the outer tube 202. The inner wall of the air bladder 204 is in contact with the valve stem 203. The outer tube 202 has equidistant slots for air intake and exhaust located inside and outside the air bladder 204. These slots ensure that gas entering the mounting cavity 201 can act on the air bladder 204, thereby deforming the air bladder 204 and squeezing the valve stem 203, thus fixing the valve stem 203 and ensuring the cleaning brush 206 effectively cleans the workpiece. The valve stem 203 is located away from the cleaning brush 206. A sealing piston is sleeved at one end, and a spring 205 is sleeved on the outside of the valve stem 203 and between the outer tube 202 and the sealing piston. The sealing piston can seal the mounting cavity 201 to prevent the gas entering the end of the mounting cavity 201 from leaking out. This ensures that the valve stem 203 and the cleaning brush 206 can move closer to the workpiece under the action of gas pressure. The spring 205 can drive the valve stem 203 to retract into the mounting cavity 201, thereby realizing the reset of the cleaning brush 206, which facilitates the subsequent workpiece to pass between the multiple cleaning brushes 206.

[0031] like Figures 6 to 9As shown, the annular ring 2 has a first air chamber 207 inside, and multiple first through holes 209 are equally spaced inside the annular ring 2 between the first air chamber 207 and the mounting cavity 201. The annular ring 2 also has a first air supply channel 208 that connects the first air chamber 207 to the outside. The annular ring 2 also has a second air chamber 211 inside, and multiple second through holes 212 are equally spaced inside the annular ring 2 between the second air chamber 211 and the mounting cavity 201. The annular ring 2 also has a second air supply channel 210 that connects the second air chamber 211 to the outside.

[0032] The gas inside the first air chamber 207 can enter the multiple mounting chambers 201 through the first through hole 209, and then act on the valve stem 203 and the sealing piston. At this time, it can drive the annular soft bag 303 and the cleaning brush 206 to move closer to the workpiece. This design can ensure that the multiple valve stems 203 move synchronously and can automatically control and adjust the distance according to the shape of the workpiece. The gas inside the second air chamber 211 can enter the corresponding mounting chamber 201 through the multiple second through holes 212. At this time, the gas entering acts on the air bag 204. The air bag 204 can realize the synchronous compression and fixation of the valve stem 203, ensuring the stability of the cleaning brush 206 cleaning the workpiece.

[0033] The body 1 is equipped with a gas charging and discharging device, which is connected to the first gas supply channel 208 and the mounting cavity 201 through a pipeline. It can control the supply of gas to the first gas cavity 207 and the second gas cavity 211 or extract the gas inside them, thereby realizing the movement and fixation of the valve stem 203. It not only has a high degree of synchronization, but is also simple to operate and has low operating costs.

[0034] like Figures 10 to 15As shown, the cleaning assembly includes a connecting frame 3 mounted on a valve stem 203. An annular mounting groove is provided inside the valve stem 203. An open-type clamp 301 is provided at one end of the connecting frame 3, fitting inside the mounting groove. The open-type clamp 301 facilitates assembly with the valve stem 203, and its installation inside the mounting groove improves the stability of the connection between the connecting frame 3 and the valve stem 203, preventing the connecting frame 3 from sliding on the valve stem 203. An annular soft bag 303 is mounted at the end of the connecting frame 3 away from the valve stem 203. Multiple nozzles are equidistantly provided on the inner ring of the annular soft bag 303. Due to the malleable nature of the annular soft bag 303, its shape can change with the position of the connecting frame 3, and thus extend towards the workpiece as the valve stem 203 extends. The lubricant is delivered to the inside of the annular soft bag 303 via a pipe near the groove. Under pressure, the lubricant inside the annular soft bag 303 is sprayed onto the workpiece through the nozzle. The annular soft bag 303 has symmetrically arranged insertion parts 304 on its outer side. A skeleton 305 is installed inside the insertion part 304. The connecting frame 3 has symmetrically arranged slots 302 inside, and the skeleton 305 is inserted into the slots 302. The skeleton 305 is made of elastic material and can change its shape according to the movement of the connecting frame 3, thereby adapting to the shape change of the annular soft bag 303. At the same time, the skeleton 305 can be matched with the slots 302, which can realize the insertion and removal of the annular soft bag 303, making it convenient to replace the annular soft bag 303.

[0035] The present invention also provides a processing method using the above-mentioned processing apparatus for automotive sliding key steel, comprising the following steps: S1. Select mold 103 according to workpiece specifications and processing requirements. Use the feeding mechanism to pass the end of the workpiece through the center of the annular ring 2 and pre-position it at the entrance of mold 103. S2. High-pressure gas is introduced into the annular ring 2 to drive the cleaning component to work; S21, First stage: High-pressure gas drives the annularly distributed cleaning units to contract radially, achieving full coverage of the workpiece; S22, Second stage: Locking the position of the cleaning unit using high-pressure gas; The cleaning unit described above consists of an outer tube 202, a valve stem 203, and a cleaning brush 206; S3. Start the lubrication assembly: Spray lubricant onto the outer wall of the workpiece through the lubrication assembly; S4. Start the chain drive mechanism to pull the lubricated workpiece through the processing area at a uniform speed, and complete the cold drawing plastic deformation through the mold 103; S5. Place the cold-drawn and shaped workpiece in an annealing furnace and heat it to 720±40 degrees Celsius, and hold it at that temperature for 4-12 hours to perform stress-relieving annealing. S6. Repeat steps S1-S5 until the workpiece is drawn to the required size, shape, precision and surface finish.

[0036] The above process replaces the surface-shape processing method used for this product, eliminating the need to remove additional material from the workpiece, ensuring the surface dimensions and line contour requirements of the product, and improving material utilization by avoiding material removal.

[0037] The workflow of the technical solution provided by this invention is as follows: During workpiece processing, the corresponding mold 103 is selected according to the workpiece specifications and the requirements of the first drawing, and installed on the collection box 102. One end of the workpiece is pushed into the mold 103 through the center of the annular ring 2 by the feeder. At this time, high-pressure gas is injected into the first air chamber 207. The gas in the first air chamber 207 enters the mounting cavity 201 through the first through hole 209. The air pressure overcomes the elastic force of the spring 205, causing the valve stem 203 to slide inside the mounting cavity 201 and the outer tube 202. This causes the valve stem 203 to move the cleaning brush 206 and press it against the outside of the workpiece (e.g., ...). Figure 14 As shown, with the gradual increase of pressure, the bristles of the cleaning brush 206 deform outward under pressure, thereby filling the gaps between multiple cleaning brushes 206 and ensuring that multiple cleaning brushes 206 work together to fully wrap the workpiece; then, high-pressure gas is injected into the second air chamber 211, and the gas enters the mounting chamber 201 through the second through hole 212, and squeezes the air bladder 204 inside the outer tube 202. At this time, the air bladder 204 is deformed under pressure and abuts against the outside of the valve stem 203, thereby fixing the valve stem 203. When the valve stem 203 moves, it drives the connecting frame 3 to move. When the connecting frame 3 moves, its end The annular soft bag 303 is deformed to match the contour of the workpiece. Then, the round steel rolling head is clamped by the clamping mechanism on the crane 101, and the hook plate is hooked onto the chain of the chain drive mechanism. The chain conveying mechanism is started to drive the hook plate and the crane 101 to move. At this time, under the action of the clamping mechanism, the round steel can be cold-drawn in conjunction with the mold 103. During the movement of the workpiece, multiple cleaning brushes 206 can clean the oxides or impurities on its outer wall. After cleaning, when part of the workpiece passes through the annular soft bag 303, the lubricant inside is sprayed onto the outer wall and groove of the workpiece through the nozzle to achieve lubrication before cold drawing of the workpiece.

[0038] After the current workpiece is pulled out, the cleaning brush 206 and the annular soft bag 303 need to be reset to allow for the entry of subsequent workpieces. This releases the gas from the mounting cavity 201, the first air chamber 207, and the second air chamber 211. At this time, the air bag 204 loses pressure and separates from the valve stem 203. Subsequently, the spring 205 drives the valve stem 203 to move in the opposite direction, causing the cleaning brush 206 to return to its initial position. Simultaneously, the valve stem 203 moves the annular soft bag 303 and restores it to its original shape. If the cleaning brush 206 needs to be replaced, it can be replaced with a new one. Unscrew the bolts securing the cleaning brush 206 to allow for independent replacement of the cleaning brush 206. Rotate the nut on the outer tube 202 to remove the outer tube 202 and valve stem 203 from the mounting cavity 201. When installing the connecting bracket 3, open the open clamp 301 and place it into the mounting groove inside the valve stem 203. Then, fix the open clamp 301 to the valve stem 203 with screws. Insert the plug part 304 and the frame 305 into the slots 302 inside the multiple connecting brackets 3 to complete the installation of the annular soft bag 303.

[0039] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the preferred embodiments, while those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0040] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A processing apparatus for automotive sliding key steel, comprising a body, characterized in that, The machine body is equipped with a chain drive mechanism inside, a traveling crane is installed on the top of the machine body, a clamping mechanism for holding workpieces is installed on the top of the traveling crane, a collection box is fixedly connected to one end of the machine body, a mold is installed inside the collection box, and an annular ring is installed inside the collection box. A cleaning component for cleaning impurities from the exterior of a workpiece, the cleaning component being connected to an annular ring; A lubrication assembly for providing all-around lubrication to the exterior of a workpiece, the lubrication assembly being connected to a cleaning assembly.

2. The processing apparatus for automotive sliding key steel according to claim 1, characterized in that, The cleaning component includes mounting cavities equidistantly spaced inside an annular ring. An outer tube is fixedly connected inside the mounting cavity, and a valve stem is slidably connected inside the outer tube. One end of the valve stem passes through the annular ring and is fitted with a cleaning brush.

3. The processing apparatus for automotive sliding key steel according to claim 2, characterized in that, An air bladder is fixedly connected to the inner side of the outer tube. The inner wall of the air bladder is in contact with the valve stem. The outer tube has slots for air intake and exhaust at equal intervals inside and outside the air bladder.

4. The processing apparatus for automotive sliding key steel according to claim 2, characterized in that, A sealing piston is fitted to the end of the valve stem away from the cleaning brush, and a spring is fitted on the outside of the valve stem between the outer tube and the sealing piston.

5. The processing apparatus for automotive sliding key steel according to claim 2, characterized in that, The annular ring has a first air chamber inside, and multiple first through holes are equally spaced inside the annular ring between the first air chamber and the mounting cavity. The annular ring also has a first air supply channel that connects the first air chamber to the outside.

6. The processing apparatus for automotive sliding key steel according to claim 2, characterized in that, The annular ring has a second air chamber inside, and multiple second through holes are equally spaced inside the annular ring between the second air chamber and the mounting cavity. The annular ring also has a second air supply channel that connects the second air chamber to the outside.

7. The processing apparatus for automotive sliding key steel according to claim 2, characterized in that, The cleaning assembly includes a connecting bracket mounted on a valve stem, with an annular soft bag installed at one end of the connecting bracket away from the valve stem. The annular soft bag has multiple nozzles evenly spaced on its inner ring.

8. The processing apparatus for automotive sliding key steel according to claim 7, characterized in that, The valve stem has an annular mounting groove inside, and one end of the connecting frame is provided with an open clamp, which is fitted inside the mounting groove.

9. The processing apparatus for automotive sliding key steel according to claim 7, characterized in that, The annular soft bag has symmetrically arranged insertion parts on its outer side, and a skeleton is installed inside the insertion parts. The connecting frame has symmetrically arranged slots inside, and the skeleton is inserted into the slots.

10. A processing method using the processing apparatus for automotive sliding key steel according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Select the mold according to the workpiece specifications and processing requirements, and use the feeding mechanism to pass the end of the workpiece through the center of the annular ring and pre-position it at the mold entrance. S2. High-pressure gas is introduced into the annular ring to drive the cleaning components to work; S21, First stage: High-pressure gas drives the annularly distributed cleaning units to contract radially, achieving full coverage of the workpiece; S22, Second stage: Locking the position of the cleaning unit using high-pressure gas; S3. Start the lubrication assembly: Spray lubricant onto the outer wall of the workpiece through the lubrication assembly; S4. Start the chain drive mechanism to pull the lubricated workpiece through the processing area at a uniform speed, and complete the cold drawing plastic deformation through the mold; S5. Place the cold-drawn and shaped workpiece in an annealing furnace for annealing treatment. S6. Repeat steps S1-S5 until the workpiece is drawn to the required size, shape, precision and surface finish.

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