Machining device and process for reducing surface decarburization depth of spring steel

Abstract

The invention provides a machining device and technology for reducing the surface decarburization depth of spring steel, and belongs to the technical field of steel machining devices. Comprising an assembling ground and a main furnace body, an assembling groove is formed in the assembling ground, and a base is arranged outside the main furnace body. By arranging the main furnace body, a relatively closed space is formed in the device, a gas replacement channel is formed in the device, rapid creation of the internal atmosphere is completed, by arranging the circulation assembly, raw materials are filled in the device in a three-dimensional mode, meanwhile, uniform heating and heat flow circulation are formed, and the uniform coverage degree of internal protective gas is ensured; the main furnace body and the discharging assembly are arranged, the overall inclination angle of the device is controlled through a hydraulic machine, raw materials are discharged in cooperation with internal rotation to assist acceleration, heat dissipation is reduced, corresponding filling is carried out through a sealing bolt, follow-up raw material preheating treatment is carried out through residual heat, and energy loss of the device is further reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of steel processing devices, in particular to a processing device and process for reducing the decarburization depth of a spring steel surface. Background Art

[0002] Spring steel is an alloy steel designed specifically for the manufacture of elastic components. It exhibits high elastic limit, fatigue strength, and hardenability, making it widely used in the automotive, machinery, aerospace, and other fields. The production process involves hot rolling, cold drawing (rolling), and advanced heat treatment techniques such as oil quenching and lead bath treatment. The chemical composition (such as carbon, silicon, and manganese) and surface quality must be strictly controlled.

[0003] Decarburization of spring steel is a key issue during hot working. It refers to the reaction between carbon atoms on the steel surface and oxidizing gases in the furnace (such as O2, CO2, and H2O), resulting in a decrease in the surface carbon content. The decarburization layer can be divided into full decarburization (ferrite layer) and partial decarburization (low-carbon martensite layer), which significantly reduces the fatigue performance, tensile strength, and wear resistance of the spring. The depth of decarburization is affected by the heating temperature, holding time, and furnace atmosphere: when the temperature rises (950℃-1250℃), the decarburization layer first increases and then decreases, reaching a peak at 1200℃; extending the heating time or increasing the concentration of oxidizing gases (such as O2 and CO2) will aggravate decarburization.

[0004] The heat treatment stage of the existing spring steel surface decarburization depth processing device is usually carried out by a step-by-step induction furnace. Each batch of raw materials is laid flat on the outside of the conveyor roller for staged processing. This process takes a long time, and the collision between the raw materials will also cause serious decarburization at the edge of the raw materials. In addition, the temperature distribution in the heating furnace is uneven, causing local overheating or low-temperature areas, prolonging the decarburization time, and causing poor temperature uniformity. At the same time, traditional gas furnaces or resistance furnaces are prone to excessive residual oxygen in the furnace due to fluctuations in gas supply, exacerbating decarburization. The drip-type atmosphere may have local carbon deficiency or airflow dead corners, resulting in uneven decarburization. Therefore, the present application provides a processing device and process for reducing the decarburization depth of spring steel surface to meet the needs. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a processing device and process for reducing the decarburization depth of the spring steel surface to solve the existing problems.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A processing device for reducing the depth of decarburization on the surface of spring steel comprises an assembly floor and a main furnace body. The assembly floor is provided with an assembly groove inside. The main furnace body is provided with a base outside. The base has a bottom area larger than the notch area of ​​the assembly groove and covers the top thereof to support the entire weight of the assembly floor. Inner ring grooves are provided at both ends of the assembly floor. Heating resistors are provided on both horizontal sides of the assembly floor.

[0008] A circulation assembly is used to store the cylindrical spring steel raw materials in a three-dimensional manner and form a uniform heating space and heat flow circulation inside. At the same time, subsequent raw material loading is completed while maintaining a relatively closed internal state, further preventing internal heat loss and assisting in maintaining the atmosphere;

[0009] The discharging assembly is used to adjust the overall inclination of the assembly ground to facilitate the loading and discharge of raw materials by gravity. The discharging assembly is installed as a whole on the outside of the base and is interconnected with the circulation assembly to form an auxiliary transmission structure.

[0010] Optionally, a sealing door is provided on the outside of the assembly floor, a filling groove is provided at the center position of the sealing door close to one side of the inner side of the assembly floor, a guide groove is provided on the other side of the sealing door at a position corresponding to the filling groove, a card strip is provided inside the guide groove, a sealing bolt is provided at the end of the card strip and the strips are clamped with each other in the guide groove, and an exhaust valve is provided on the top of the assembly floor.

[0011] Optionally, the circulation assembly includes a gear ring, a support frame, a slotted plate, a drive motor and a transmission shaft, and the sealing bolt is position-adjusted inside the guide groove by a clamping strip and docked with the slotted plate notch.

[0012] Optionally, the gear ring is movably connected inside the inner ring groove, the support frame is fixedly connected in parallel between the gear rings, the groove plate is fixedly connected between the support frames, the drive motor is disassembled and connected to the outside of the base through the fixed end, and the transmission shaft is fixedly connected to the end of the drive motor shaft and movably connected to the inner side of the base at the other end.

[0013] Optionally, a connecting gear is provided on the outside of the transmission shaft at a position corresponding to the inner ring groove, the connecting gear is meshed with the gear ring, and a central groove is provided between the groove plates at the central axis.

[0014] Optionally, a driven shaft is provided at the central axis inside the assembly floor, a circulating fan is provided outside the driven shaft, a docking groove is opened at the center position inside the sealing door, the docking groove is engaged with the driven shaft, and the driven shaft is movably connected inside the central groove.

[0015] Optionally, the discharging assembly includes a hydraulic press, a connecting bearing, an offset base and a connecting shaft. The hydraulic press is arranged inside the assembly groove, the connecting bearings are arranged at both ends of the hydraulic press and are interconnected with the inner wall of the assembly groove, the offset bases are respectively arranged on the base and the end of the hydraulic rod of the hydraulic press, and the offset bases are movably connected with a connecting shaft.

[0016] Optionally, both the driven shaft and the transmission shaft are provided with externally protruding gear shafts, and the outsides of the externally protruding gear shafts are connected with transmission belts.

[0017] Optionally, the method includes the following steps: during the initial processing, the sealing door is opened to insert the raw materials into the trough disc in sequence, and then the sealing door is closed for decarburization processing. During this process, the drive motor is turned on to drive the connecting gear on the outside of the transmission shaft to engage with the gear ring, so that the heat sources on both sides of the assembly ground circulate through the trough disc itself to evenly heat the internal raw materials. After the processing is completed, the hydraulic press is turned on to synchronously lift part of the height, the sealing door is opened and the hydraulic press close to the drive motor is started separately to make the assembly ground as a whole inclined. Then, the raw materials stored in the trough disc are gradually discharged and transported to the outside under the action of gravity. After the interior is emptied manually, the sealing door is closed to seal the interior to retain the residual temperature inside. The drive motor is turned on again to drive the trough disc to rotate in stages. During the dwell period of each stage, the sealing bolt is pushed to stay in position and dock with the trough disc notch and push the raw materials into the interior. During the operation, inert gas is injected into the interior through the sealing bolt and replaced with the exhaust valve to maintain the stability of the internal atmosphere.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] In the above scheme, a relatively closed space is formed inside the device by setting up the main furnace body, and an internal gas replacement channel is formed by sealing the bolt and cooperating with the exhaust valve to quickly create the internal atmosphere and control the internal residual oxygen content.

[0020] By setting up a circulation component, the raw materials can be filled three-dimensionally inside the device, which increases the spatial density of each processing. At the same time, the groove plate rotates to achieve uniform heating and form a heat flow circulation inside, ensuring uniform coverage of the internal protective gas. At the same time, the circulating heat flow reduces the formation of internal heating dead corners.

[0021] By setting up the main furnace body and discharge components, after the device completes the heat treatment process, the overall inclination angle of the device is controlled by the hydraulic press, and the self-rotation of the internal circulation component is used to assist in accelerating the discharge of the raw materials, thereby reducing the dissipation of internal heat. After discharge, the corresponding filling is carried out through the sealing bolt, further reducing heat loss. The subsequent raw material pre-heating treatment is carried out through the residual heat, further reducing the energy consumption of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable one skilled in the art to make and use the invention.

[0023] Figure 1 Schematic diagram of the overall appearance of the processing device;

[0024] Figure 2 for Figure 1 Internal expansion diagram;

[0025] Figure 3 It is a side view of the processing device;

[0026] Figure 4 It is a side sectional view of the processing device;

[0027] Figure 5 for Figure 4 Exploded diagram of the internal structure;

[0028] Figure 6 It is a partial structural diagram of the circulation component;

[0029] Figure 7 for Figure 5 A magnified view of the structure at point A;

[0030] 1. Assembly floor; 101. Assembly groove; 2. Main furnace body; 201. Heating resistor; 202. Sealing door; 203. Docking groove; 204. Filling groove; 205. Guide groove; 206. Card strip; 207. Sealing bolt; 208. Base; 209. Exhaust valve; 210. Inner ring groove; 3. Circulation component; 301. Gear ring; 302. Support frame; 303. Grooved plate; 304. Center groove; 305. Drive motor; 306. Transmission shaft; 307. Connecting gear; 308. Fixed end; 309. Driven shaft; 310. Circulation fan; 311. Transmission belt; 4. Discharging component; 401. Hydraulic press; 402. Connecting bearing; 403. Offset base; 404. Connecting shaft.

[0031] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0032] The following describes a medical transport bed provided by the present invention in detail with reference to the accompanying drawings and specific embodiments. It is also noted that, for the sake of completeness, the following embodiments are best and preferred embodiments, and those skilled in the art may employ alternative implementations for known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0033] It should be noted that references in the specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes such specific features, structures, or characteristics. In addition, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0034] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0035] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” means not only “directly on” something but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” means not only “on” or “above” something but also includes the meaning of being “on” or “above” something with no intervening features or layers.

[0036] Additionally, spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as illustrated in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein should be similarly interpreted accordingly.

[0037] like Figures 1 to 7 As shown, an embodiment of the present invention provides a transport medical bed, comprising an assembly floor 1 and a main furnace body 2. The assembly floor 1 has an assembly groove 101 formed therein, and the main furnace body 2 has a base 208 provided on the outside. The base 208 has a bottom area larger than the notch area of ​​the assembly groove 101 and covers the top thereof to support the entire weight of the assembly floor 1. Inner ring grooves 210 are formed at both ends of the assembly floor 1, and heating resistors 201 are provided on both horizontal sides of the assembly floor 1.

[0038] Circulation assembly 3, which is used to store the cylindrical spring steel raw materials in a three-dimensional manner and form a uniform heating space and heat flow circulation inside. At the same time, it completes the subsequent raw material loading while maintaining the internal relatively closed state, further preventing internal heat loss and assisting in maintaining the atmosphere;

[0039] The discharge assembly 4 is used to adjust the overall inclination of the assembly ground 1 to facilitate the loading and discharge of raw materials by gravity. The discharge assembly 4 is installed as a whole outside the base 208 and is interconnected with the circulation assembly 3 to form an auxiliary transmission structure.

[0040] During the initial processing, the sealing door 202 is opened to expand the internal space, and the raw materials are inserted into the groove plate 303 in sequence, and then the sealing door 202 is closed and the heating resistor 201 is started to heat and perform decarburization processing. During this process, the driving motor 305 is turned on to drive the connecting gear 307 on the outside of the transmission shaft 306 to engage with the gear ring 301, so that the heat source on both sides of the assembly ground 1 can circulate through the groove plate 303 itself to make the internal raw materials evenly heated, thereby improving the processing efficiency. After the processing is completed, the hydraulic press 401 is turned on to synchronously lift the overall height of the part, and the sealing door 202 is opened and the hydraulic press 401 on the side close to the driving motor 305 is separately started to make the assembly ground The surface 1 is tilted toward the sealing door 202 as a whole. Under the action of gravity, the raw materials stored in the trough plate 303 are discharged to the outside. After the interior is emptied manually, the sealing door 202 is closed to seal the interior of the assembly floor 1 to retain the internal residual temperature. The driving motor 305 is turned on again to drive the trough plate 303 to rotate in stages. During the dwell period of each stage, the sealing plug 207 is pushed to stay in the corresponding position and dock with the notch of the trough plate 303 to push the raw materials into the interior. During subsequent operations, inert gas is injected into the interior through the sealing plug 207 and the residual gas is discharged in conjunction with the exhaust valve 209 to form a replacement to maintain the stability of the internal atmosphere.

[0041] In this embodiment, if Figures 1 to 7 As shown, during the operation, the groove plate 303 is driven to rotate as a whole by the driving motor 305 to form a uniform heating process, and the driven shaft 309 is driven to rotate by the transmission belt 311. Since there is a diameter difference between the driven shaft 309 and the external convex tooth shaft arranged outside the transmission shaft 306, the rotation speed of the driven shaft 309 is accelerated and the external circulation fan 310 is used to quickly drive the internal gas through the central groove 304 and form an end point circulation for the internal airflow of the assembly floor 1, ensuring that the internal atmosphere is evenly covered over the entire range of raw materials.

[0042] The present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention. To provide a thorough understanding of the present invention, specific details are described in detail below in connection with the preferred embodiments of the present invention, but those skilled in the art will be able to fully understand the present invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A processing device for reducing the decarburization depth of spring steel surface, characterized in that: The invention comprises an assembly floor (1) and a main furnace body (2), wherein an assembly groove (101) is provided inside the assembly floor (1), and a base (208) is provided outside the main furnace body (2), wherein the bottom area of ​​the base (208) is larger than the notch area of ​​the assembly groove (101) and covers the top thereof to support the overall weight of the assembly floor (1), inner ring grooves (210) are provided at both ends inside the assembly floor (1), and heating resistors (201) are provided at both horizontal sides inside the assembly floor (1); A circulation component (3) is used to store the columnar spring steel raw materials in a three-dimensional manner and form a uniform heating space and heat flow circulation inside, while completing subsequent raw material loading while maintaining a relatively closed internal state, further preventing internal heat loss, and assisting in maintaining the atmosphere; A discharge assembly (4) is used to adjust the overall inclination of the assembly floor (1) to facilitate the loading and discharge of raw materials by gravity. The discharge assembly (4) is integrally mounted on the outside of the base (208) and is interconnected with the circulation assembly (3) to form an auxiliary transmission structure.

2. A processing device for reducing the decarburization depth of spring steel surface according to claim 1, characterized in that: The assembly floor (1) is provided with a sealing door (202) on the outside, a filling groove (204) is provided at a central position of one side of the sealing door (202) close to the inside of the assembly floor (1), a guide groove (205) is provided on the other side of the sealing door (202) at a position corresponding to the filling groove (204), a clamping strip (206) is provided inside the guide groove (205), a sealing bolt (207) is provided at the end of the clamping strip (206) and the clamping strips (206) are mutually clamped in the guide groove (205), and an exhaust valve (209) is provided on the top of the assembly floor (1).

3. A processing device for reducing the decarburization depth of spring steel surface according to claim 2, characterized in that: The circulation assembly (3) comprises a gear ring (301), a support frame (302), a slotted disc (303), a drive motor (305) and a transmission shaft (306); the sealing bolt (207) is adjusted in position within the guide groove (205) by means of a clamping strip (206) and docked with a notch of the slotted disc (303).

4. A processing device for reducing the decarburization depth of spring steel surface according to claim 3, characterized in that: The gear ring (301) is movably connected inside the inner ring groove (210), the support frame (302) is fixedly connected between the gear rings (301) in parallel, the groove plate (303) is fixedly connected between the support frames (302), the drive motor (305) is detachably connected to the outside of the base (208) through the fixed end (308), and the transmission shaft (306) is fixedly connected to the end of the drive motor (305) shaft and movably connected to the inner side of the base (208) at the other end.

5. A processing device for reducing the decarburization depth of spring steel surface according to claim 4, characterized in that: A connecting gear (307) is provided on the outside of the transmission shaft (306) at positions corresponding to the inner ring groove (210), the connecting gear (307) is meshedly connected with the gear ring (301), and a central groove (304) is provided between the groove plates (303) at the central axis.

6. A processing device for reducing the decarburization depth of spring steel surface according to claim 5, characterized in that: A driven shaft (309) is provided at the central axis of the assembly floor (1), a circulating fan (310) is provided outside the driven shaft (309), a docking groove (203) is provided at the center position inside the sealing door (202), the docking groove (203) is engaged with the driven shaft (309), and the driven shaft (309) is movably connected inside the central groove (304).

7. The processing device for reducing the decarburization depth of the spring steel surface according to claim 1, characterized in that: The discharging assembly (4) comprises a hydraulic press (401), a connecting bearing (402), a dislocation base (403) and a connecting shaft (404); the hydraulic press (401) is arranged inside the assembly groove (101); the connecting bearing (402) is arranged at both ends of the hydraulic press (401) and is connected to the inner wall of the assembly groove (101); the dislocation base (403) is respectively arranged on the base (208) and the end of the hydraulic rod of the hydraulic press (401); and the connecting shaft (404) is movably connected between the dislocation bases (403).

8. The processing device for reducing the decarburization depth of the spring steel surface according to claim 6, characterized in that: The driven shaft (309) and the transmission shaft (306) are both provided with externally protruding gear shafts on the outside, and are externally connected to a transmission belt (311).

9. A process for reducing the depth of decarburization on the surface of spring steel according to claims 1-8, characterized in that: The method comprises the following steps: during the initial processing, the sealing door (202) is opened to insert the raw materials into the groove plate (303) in sequence, and then the sealing door (202) is closed to perform decarburization processing; during this process, the driving motor (305) is turned on to drive the connecting gear (307) outside the transmission shaft (306) to mesh with the gear ring (301), so that the heat sources on both sides of the assembly ground (1) are circulated through the groove plate (303) itself to uniformly heat the internal raw materials; after the processing is completed, the hydraulic press (401) is turned on to synchronously raise the height of part, the sealing door (202) is opened, and the hydraulic press (401) on the side close to the driving motor (305) is separately started. ) makes the assembly floor (1) tilted as a whole, and then the raw materials stored in the slot tray (303) are gradually discharged and transported to the outside under the action of gravity. After the interior is emptied manually, the sealing door (202) is closed to seal the interior to retain the residual temperature inside. The driving motor (305) is turned on again to drive the slot tray (303) to rotate in stages. During the dwell period of each stage, the sealing bolt (207) is pushed to the dwell position and docked with the slot of the slot tray (303) to push the raw materials inside. During the operation, inert gas is injected into the interior through the sealing bolt (207) and replaced with the exhaust valve (209) to maintain the stability of the internal atmosphere.

Images