Casting track for camshaft casting

Abstract

The invention discloses a casting track for camshaft casting, which comprises the following steps during camshaft casting: carbon steel or alloy steel raw materials are put into a smelting device for melting, and a secondary feeding box is used for quantitative material supplementation; a plurality of forming molds are laid on the continuous casting track device; a cooling circulating water channel is started, and the annular guide rail frame is effectively cooled; the composite casting pipe orifice is aligned and communicated with the mold cavity of the forming mold, so that casting forming is realized; the melt is controlled to enter a forming mold from a smelting device through a composite casting pipe orifice, so that the cast melt reaches the states of uniform distribution, high-speed flowing and reasonable direction before entering the forming mold; after the melt in the forming mold is solidified, the solidified camshaft casting is taken out through a discharging device; efficient casting forming of the cam shaft can be achieved, the production efficiency and the product quality are improved, and the production cost and the defect rate are reduced.

Description

Technical Field

[0001] The invention relates to the field of mechanical parts processing, in particular to a casting track for camshaft casting. Background Art

[0002] At present, mass production of automobile camshafts usually adopts casting to form automobile camshaft blanks, and then undergoes subsequent mechanical finishing to form the final product.

[0003] In the related art, during the casting process of automobile camshafts, combined with the casting materials of carbon steel or alloy steel, the following technical problems are found in production: due to the large solidification shrinkage rate of carbon steel or alloy steel, the existing pouring pipeline is a single-path pipeline pouring process. If the pouring temperature is too low, it will cause uneven distribution of inlet flow rate, and then make the casting melt flow easy to flow along the wall, causing friction loss. This will lead to shrinkage holes and shrinkage defects inside or on the surface of the casting, affecting the density and mechanical properties of the casting.

[0004] In view of this, this application is filed. Summary of the invention

[0005] The purpose of the present invention is to provide a casting track for camshaft casting, aiming to solve the following technical problems found in the related technology that during the casting process of automobile camshafts, the casting materials of carbon steel or alloy steel are used. Due to the large solidification shrinkage rate of carbon steel or alloy steel, the existing casting pipeline is a single-path pipeline. If the casting temperature is too low, it will cause uneven inlet flow velocity distribution, and the casting melt flow is easy to flow along the wall, causing friction loss. This will lead to shrinkage holes and shrinkage defects inside or on the surface of the casting, affecting the density and mechanical properties of the casting. The present invention provides the following technical solution: a casting track for camshaft casting, comprising the following steps: S100: Put the carbon steel or alloy steel raw material into the smelting device for melting, and use the secondary feeding box for quantitative feeding to ensure the quality and temperature of the melt; S200: laying a plurality of forming molds on the continuous casting track device, and setting a mold positioning frame to slide along the annular guide frame; S300: Start the cooling water circulation channel to effectively cool the annular guide rail frame; S400: Aligning and communicating the composite casting nozzle with the mold cavity of the molding die to achieve casting molding, wherein the composite casting nozzle includes a casting acceleration flow channel, an intermediate mixing flow channel, a drainage acceleration pipeline and a casting conical pipeline; S500: controlling the melt to enter the molding die from the smelting device through the composite casting nozzle, so that the casting melt reaches a state of uniform distribution, high-speed flow and reasonable direction before entering the molding die; S600: After the melt in the molding die solidifies, the solidified camshaft casting is taken out using a discharging device; The casting component includes a sealing block and a composite casting nozzle formed inside the sealing block; The plurality of molding dies are transported to the casting component in the continuous casting track device according to a predetermined path and program control; When any of the molding dies is conveyed to the bottom of the casting component, the casting is realized by aligning and communicating the composite casting nozzle with the molding die cavity.

[0006] In one embodiment, the diameter of the middle mixing channel of the composite casting nozzle is larger than the diameter of the casting cone pipe outlet, the diameter of the casting cone pipe outlet is larger than the outlet diameter of the drainage acceleration pipe, and the diameter of the drainage acceleration pipe is smaller than the diameter of the casting acceleration channel.

[0007] In one embodiment, the forming mold is transported to the bottom of the casting component on a continuous casting track device according to a predetermined path and program control.

[0008] In one embodiment, the composite casting nozzle includes a casting acceleration flow channel located inside the sealing block, an intermediate mixing flow channel located inside the sealing block and connected to the outlet of the casting acceleration flow channel, a drainage acceleration pipe connected to the outlet of the intermediate mixing flow channel, and a casting conical pipe connected to the outlet of the drainage acceleration pipe.

[0009] In one embodiment, the diameter of the intermediate mixing channel is larger than the diameter of the casting conical pipe outlet; The outlet diameter of the casting conical pipe is larger than the outlet diameter of the drainage acceleration pipe; The diameter of the drainage acceleration pipeline is smaller than the diameter of the casting acceleration flow channel.

[0010] In one embodiment, a secondary feeding box is sealed at the feed inlet of the smelting device; the secondary feeding box includes an external feeding box and a blanking box; a feeding channel is provided between the external feeding box and the blanking box, and a baffle that rotates to open or close is provided in the feeding channel; when feeding is required, the baffle is closed to form an independent box space between the external feeding box and the blanking box; after feeding is completed, the feeding port of the feeding box is closed, and the baffle is opened to allow the raw material to pass through the blanking box and fall into the smelting device.

[0011] In one embodiment, a discharge device of the forming mold is provided on the outer side of the continuous casting track device.

[0012] In one embodiment, the discharging device is a hoisting discharging device or a robot.

[0013] In one embodiment, the cross section of the guide groove is a trapezoidal or rectangular structure.

[0014] In summary, the present invention has the following beneficial effects: (1) It can realize efficient, high-quality and high-speed casting of camshafts, improve production efficiency and product quality, and reduce production costs and defect rates. Specifically: by adopting a continuous casting track device, it is possible to realize automatic circulation and alignment of multiple molding molds without manual intervention and handling, saving time and manpower, and reducing labor intensity and risks. By adopting a composite casting nozzle, it is possible to realize the functions of multi-way diversion, mixing, acceleration and guidance, so that the casting melt can reach a state of uniform distribution, high-speed flow and reasonable direction before entering the molding mold, thereby effectively reducing the solidification shrinkage rate and improving the density and mechanical properties of the camshaft casting. By adopting a melting device and a secondary feeding box, it is possible to control and ensure the quality and temperature of the melt, and avoid losses and pollution caused by oxidation, splashing and other phenomena during the feeding process. By adopting a discharging device, it is possible to realize the automatic removal of the solidified camshaft casting, improve production efficiency and safety, and reduce manual operation and errors.

[0015] (2) There are certain differences in the diameter settings of the various parts of the composite casting nozzle. The diameter of the intermediate mixing flow channel is larger than the diameter of the casting cone pipe outlet, so that multiple melts can be fully mixed in the intermediate mixing flow channel, and at the same time, melt reflux and pressure fluctuations caused by a sudden decrease in diameter can be avoided. The outlet diameter of the casting cone pipe is larger than the outlet diameter of the drainage acceleration pipe, so that the melt can gradually shrink in the casting cone pipe to form a stable jet, and at the same time, melt dispersion and impact caused by a sudden increase in diameter can be avoided. The diameter of the drainage acceleration pipe is smaller than the diameter of the casting acceleration flow channel, so that the melt can generate a larger pressure difference and velocity increment in the drainage acceleration pipe, thereby achieving effective acceleration. At the outlet of the casting conical pipe, due to the turbulent diffusion effect of the jet boundary layer, momentum exchange occurs with the surrounding melt, and the contact surface between the working melt and the ejecting melt is larger than that of the corresponding casting pipe with a single path. The working melt and the ejecting melt can exchange energy and momentum relatively quickly, making the mixed melt speed uniform earlier. Compared with the casting pipe with a single path, the above structure can improve the melt casting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 The present invention is a flow chart of a casting track for camshaft casting. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the new embodiments of the system. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] refer to Figure 1 As shown, a specific embodiment of a casting track for camshaft casting is as follows: A casting track for camshaft casting comprises the following steps: S100: Put the carbon steel or alloy steel raw material into the smelting device for melting, and use the secondary feeding box for quantitative feeding to ensure the quality and temperature of the melt; S200: laying a plurality of forming molds on the continuous casting track device, and setting a mold positioning frame to slide along the annular guide frame; S300: Start the cooling water circulation channel to effectively cool the annular guide rail frame; S400: Aligning and communicating the composite casting nozzle with the mold cavity of the molding die to achieve casting molding, wherein the composite casting nozzle includes a casting acceleration flow channel, an intermediate mixing flow channel, a drainage acceleration pipeline and a casting conical pipeline; S500: controlling the melt to enter the molding die from the smelting device through the composite casting nozzle, so that the casting melt reaches a state of uniform distribution, high-speed flow and reasonable direction before entering the molding die; S600: After the melt in the molding die solidifies, the solidified camshaft casting is taken out using a discharging device; The casting component includes a sealing block and a composite casting nozzle formed inside the sealing block; The plurality of molding dies are transported to the casting component in the continuous casting track device according to a predetermined path and program control; When any of the molding dies is conveyed to the bottom of the casting component, the casting is realized by aligning and communicating the composite casting nozzle with the molding die cavity.

[0020] By adopting the above scheme, efficient, high-quality and high-speed casting and molding of the camshaft can be achieved, production efficiency and product quality can be improved, and production costs and defect rates can be reduced. Specifically: by adopting a continuous casting track device, automatic circulation and alignment of multiple molding molds can be achieved without manual intervention and handling, saving time and manpower, and reducing labor intensity and risks. By adopting a composite casting nozzle, the functions of multi-way diversion, mixing, acceleration and guidance can be realized, so that the casting melt can reach a state of uniform distribution, high-speed flow and reasonable direction before entering the molding mold, thereby effectively reducing the solidification shrinkage rate and improving the density and mechanical properties of the camshaft casting. By adopting a smelting device and a secondary feeding box, the quality and temperature of the melt can be controlled and guaranteed, avoiding losses and pollution caused by oxidation, splashing and other phenomena during the feeding process. By adopting a discharging device, the automatic removal of the solidified camshaft casting can be achieved, improving production efficiency and safety, and reducing manual operations and errors.

[0021] In one embodiment, the diameter of the middle mixing channel of the composite casting nozzle is larger than the diameter of the casting cone pipe outlet, the diameter of the casting cone pipe outlet is larger than the outlet diameter of the drainage acceleration pipe, and the diameter of the drainage acceleration pipe is smaller than the diameter of the casting acceleration channel.

[0022] In one embodiment, the forming mold is transported to the bottom of the casting component on a continuous casting track device according to a predetermined path and program control.

[0023] In one embodiment, the composite casting nozzle includes a casting acceleration flow channel located inside the sealing block, an intermediate mixing flow channel located inside the sealing block and connected to the outlet of the casting acceleration flow channel, a drainage acceleration pipe connected to the outlet of the intermediate mixing flow channel, and a casting conical pipe connected to the outlet of the drainage acceleration pipe.

[0024] In one embodiment, the diameter of the intermediate mixing channel is larger than the diameter of the casting conical pipe outlet; The outlet diameter of the casting conical pipe is larger than the outlet diameter of the drainage acceleration pipe; The diameter of the drainage acceleration pipeline is smaller than the diameter of the casting acceleration flow channel.

[0025] In one embodiment, a secondary feeding box is sealed at the feed inlet of the smelting device; the secondary feeding box includes an external feeding box and a blanking box; a feeding channel is provided between the external feeding box and the blanking box, and a baffle that rotates to open or close is provided in the feeding channel; when feeding is required, the baffle is closed to form an independent box space between the external feeding box and the blanking box; after feeding is completed, the feeding port of the feeding box is closed, and the baffle is opened to allow the raw material to pass through the blanking box and fall into the smelting device.

[0026] In one embodiment, a discharge device of the forming mold is provided on the outer side of the continuous casting track device.

[0027] In one embodiment, the discharging device is a hoisting discharging device or a robot.

[0028] In one embodiment, the cross section of the guide groove is a trapezoidal or rectangular structure.

[0029] Furthermore, the continuous casting track device includes a bracket body, an annular guide frame arranged on the bracket body, a mold positioning frame slidably arranged on the annular guide frame, a gear transmission assembly for driving the mold positioning frame to rotate, and a motor for driving the gear transmission assembly to rotate. It can realize automatic cyclic conveying and alignment of multiple molding molds, improve production efficiency and accuracy, and reduce manual operations and errors. Specifically: the annular guide frame can provide a fixed track structure, so that the mold positioning frame can be conveyed to the bottom of the casting component along a predetermined path and program control, ensuring its alignment and communication with the casting component.

[0030] The mold positioning frame can provide a movable supporting structure, so that multiple molding molds can be firmly fixed thereon, and as it slides on the annular guide rail frame, continuous casting and molding of multiple molding molds can be achieved.

[0031] The gear transmission combination can provide a reliable transmission structure, so that the mold positioning frame can form a meshing relationship with the annular guide frame, and through the meshing action of the gears, the mold positioning frame can be rotated evenly and smoothly.

[0032] The motor can provide driving force so that the gear transmission assembly can rotate at a set speed and direction, and convert it into a rotational motion of the mold positioning frame through the gear transmission assembly, thereby realizing fast and accurate transportation of the mold positioning frame.

[0033] Furthermore, guide grooves are provided on both sides of the annular guide rail frame; at least one guide wheel assembly is provided on the mold positioning frame and at a position corresponding to the guide groove. Guide grooves are provided on both sides of the annular guide rail frame; at least one guide wheel assembly is provided on the mold positioning frame and at a position corresponding to the guide groove, which can effectively guide and support the mold positioning frame and ensure its smooth sliding and precise alignment on the annular guide rail frame.

[0034] Specifically: the guide groove can provide an arc-shaped sliding track concentric with the annular guide rail frame, so that the mold positioning frame can be transported to the bottom of the casting component along the predetermined path and program control, avoiding collision and jamming caused by deviation from the track. The guide wheel assembly can be closely matched with the guide groove to form a rolling friction contact mode, so that the mold positioning frame can slide smoothly on the annular guide rail frame, reducing its friction and wear, and improving its operating efficiency and life.

[0035] The guide wheel assembly can automatically adjust the contact pressure and angle with the guide groove according to the weight and position of the mold positioning frame, so that the mold positioning frame can maintain a horizontal and stable state on the annular guide frame to prevent its alignment and connection with the casting parts from being affected by tilting or shaking.

[0036] Furthermore, a cooling circulating water channel is provided in the annular guide rail frame, which can realize effective cooling of the annular guide rail frame, extend its service life, and prevent deformation and damage caused by overheating.

[0037] Specifically: the cooling circulating water channel can transport cooling water from the water source to the inside of the annular guide rail frame through water pumps, valves, pipes and other components, and then transport hot water from the inside of the annular guide rail frame to the water tank or radiator, and then transport cooling water from the water tank or radiator to the water source, forming a closed circulation system to achieve continuous cooling of the annular guide rail frame.

[0038] The cooling circulating water channel can automatically adjust the flow and temperature of the cooling water according to the temperature and working status of the annular guide frame through thermostats, sensors, regulators and other components to ensure that the temperature of the annular guide frame is within a reasonable range and avoid affecting its performance and life due to excessively high or low temperature.

[0039] The cooling circulating water channel can isolate the inside of the annular guide frame from the outside through sealing rings, gaskets, screws and other components to prevent the cooling water from contacting with the melt, air and other substances, thereby avoiding losses and risks caused by leakage or contamination of the cooling water.

[0040] Furthermore, the composite casting nozzle includes a casting acceleration flow channel located inside the sealing block, an intermediate mixing flow channel located inside the sealing block and connected to the outlet of the casting acceleration flow channel, a drainage acceleration pipe connected to the outlet of the intermediate mixing flow channel, and a casting conical pipe connected to the outlet of the drainage acceleration pipe.

[0041] Specifically, the setting of the composite casting nozzle can effectively solve the defects of shrinkage cavities and shrinkage inside or on the surface of the casting caused by the problems of too low pouring temperature, uneven inlet flow velocity distribution, easy wall-attached flow of the casting melt flow, etc. in the prior art, and improve the density and mechanical properties of the casting. The structural design of the composite casting nozzle can realize the functions of multi-way diversion, mixing, acceleration and guidance, so that the temperature and composition of the melt are uniform during the casting process, the flow rate is fast, the solidification time is short, the solidification shrinkage rate is small, the filling capacity is strong, the forming quality is high, and the generation of defects such as bubbles, inclusions and oxidation is avoided. In addition, there are certain differences in the diameter settings of the various parts of the composite casting nozzle, so that the melt produces different flow effects in different flow channels, realizes the coordinated cooperation of the diversion, mixing, acceleration and guidance of the melt, and improves the efficiency of melt casting.

[0042] More specifically, the diameters of the various parts of the composite casting nozzle are set to have certain differences, so that the melt produces different flow effects in different flow channels, realizes the coordinated cooperation of the melt's diversion, mixing, acceleration and guidance, and improves the melt casting efficiency. Specifically, compared with the pipe with a single-path pouring pipe, the setting of the composite casting nozzle can bring the following beneficial effects: the setting of the casting acceleration flow channel can increase the flow area of ​​the melt, reduce the flow resistance by about .7%, and increase the flow speed by about . times, thereby improving the fluidity and pouring efficiency of the melt. The setting of the intermediate mixing flow channel can homogenize the temperature and composition of the melt, eliminate the temperature gradient and structural inhomogeneity, reduce segregation and stratification, thereby improving the homogeneity of the melt and the mechanical properties of the casting. The setting of the drainage acceleration pipeline can increase the pressure difference of the melt by about .9 times and the speed increment by about . times, thereby achieving an effective acceleration effect, shortening the solidification time, and reducing the solidification shrinkage rate, thereby improving the filling capacity of the melt and the forming quality of the casting. The setting of the casting conical pipe can stabilize the flow direction of the melt, form a stable jet, avoid the generation of defects such as bubbles, inclusions and oxidation, thereby improving the guidance of the melt and the surface quality of the casting.

[0043] Furthermore, the diameter of the intermediate mixing flow channel is greater than the diameter of the casting cone pipe outlet; the diameter of the casting cone pipe outlet is greater than the diameter of the drainage acceleration pipe outlet; the diameter of the drainage acceleration pipe is smaller than the diameter of the casting acceleration flow channel. The structural design of the composite casting nozzle can realize the functions of multi-way diversion, mixing, acceleration and guidance, thereby improving the density and mechanical properties of the camshaft casting. Specifically: the casting acceleration flow channel can divide the melt into multiple paths, increase its flow area, reduce its flow resistance, and increase its flow speed. The intermediate mixing flow channel can mix the multi-path melt to make its temperature and composition uniform, eliminate the temperature gradient and structural inhomogeneity inside it, and reduce the segregation and stratification phenomenon during its solidification process. The drainage acceleration pipe can further accelerate the mixed melt to achieve a higher flow speed, shorten its solidification time, reduce its solidification shrinkage rate, and improve its filling capacity and forming quality. The casting cone pipe can guide the accelerated melt so that it enters the molding mold in a reasonable direction to avoid defects such as bubbles, inclusions and oxidation during its entry.

[0044] More specifically, in order to achieve the above functions, the diameters of the various parts of the composite casting nozzle are set to have certain differences. Specifically: the diameter of the intermediate mixing flow channel is larger than the diameter of the casting cone pipe outlet, so that multiple melts can be fully mixed in the intermediate mixing flow channel, and at the same time, melt reflux and pressure fluctuations caused by a sudden decrease in diameter can be avoided. The outlet diameter of the casting cone pipe is larger than the outlet diameter of the drainage acceleration pipe, so that the melt can gradually shrink in the casting cone pipe to form a stable jet, and at the same time, melt dispersion and impact caused by a sudden increase in diameter can be avoided. The diameter of the drainage acceleration pipe is smaller than the diameter of the casting acceleration flow channel, so that the melt can produce a larger pressure difference and velocity increment in the drainage acceleration pipe, thereby achieving an effective acceleration effect. At the outlet of the casting conical pipe, due to the turbulent diffusion of the jet boundary layer, momentum exchange occurs with the surrounding melt, and the contact surface between the working melt and the ejection melt is larger than that of the corresponding pouring pipe with a single path. The working melt and the ejection melt can exchange energy and momentum relatively quickly, making the mixed melt speed uniform earlier. Compared with the pouring pipe with a single path, the above structure can improve the melt casting efficiency.

[0045] Furthermore, a secondary feeding box is sealed at the feeding port of the smelting device; the secondary feeding box includes an external feeding box and a blanking box; a feeding channel is provided between the external feeding box and the blanking box, and a baffle that can be rotated to open or close is provided in the feeding channel; when feeding is required, the baffle is closed to form an independent box space between the external feeding box and the blanking box; after feeding, the feeding port of the feeding box is closed, and the baffle is opened to allow the raw materials to pass through the blanking box and fall into the smelting device. The structural design of the secondary feeding box can realize quantitative feeding of the smelting device, ensure the quality and temperature of the melt, and avoid losses and pollution caused by oxidation, splashing, etc. during the feeding process.

[0046] Specifically: a feeding channel is provided between the external feeding box and the blanking box, and a baffle that can be rotated to open or close is provided in the feeding channel, so as to realize the control and adjustment of the feeding amount, so that the amount of raw materials put into the smelting device each time is just right, neither too much to cause waste nor too little to affect the stability of the melt.

[0047] When feeding is required, the baffle is closed to form an independent box space between the external feeding box and the blanking box, so as to realize sealed storage of the raw materials, prevent them from contacting with the outside air, avoid deterioration such as oxidation and moisture absorption, and ensure their quality and composition.

[0048] After the feeding is completed, the feeding port of the feeding box is closed and the baffle is opened, so that the raw materials fall into the smelting device through the feeding box. This can achieve rapid feeding of the raw materials, shorten the contact time between the raw materials and the melt, reduce the temperature loss and splashing risk, and improve the melting efficiency and safety.

[0049] Furthermore, a discharging device of the forming mold is provided on the outer side of the continuous casting track device, which can realize automatic removal of the solidified camshaft casting, improve production efficiency and safety, and reduce manual operation and errors.

[0050] Specifically: the discharge device can automatically unload the molding mold from the continuous casting track device according to its position and state, and transport it to a designated position or device for subsequent cooling, demolding, inspection and other processes without manual intervention and handling, saving time and manpower, and reducing labor intensity and risks.

[0051] The discharging device can take out the molding die stably and smoothly in a suitable manner and with a suitable force according to the shape and weight of the molding die, thus avoiding damage or deformation to the molding die and the camshaft casting, and ensuring their quality and precision.

[0052] The discharging device can take out the materials in an orderly and continuous manner at a reasonable speed and interval according to the temperature and state of the molding die, avoiding heat loss due to long residence time or stress concentration due to overcooling, thus ensuring its performance and stability.

[0053] Further, the discharging device is a hoisting discharging device or a manipulator. The discharging device can be a hoisting discharging device or a manipulator, and a suitable method can be selected according to different occasions and needs to improve the adaptability and flexibility of the discharging device.

[0054] Specifically: the lifting and discharging device can use hooks, slings, rings and other components to lift the molding mold from the continuous casting track device and move it to a designated position or device. It is suitable for situations where the molding mold is larger, heavier, and more stable, and can achieve a larger handling range and a higher handling speed.

[0055] The robot can use clamps, suction cups, magnets and other components to clamp or adsorb the molding mold from the continuous casting track device and move it to a designated position or device. It is suitable for situations where the molding mold is smaller, lighter and more flexible, and can achieve more precise handling positions and more flexible handling angles.

[0056] Furthermore, the cross section of the guide groove is a trapezoidal or rectangular structure. The cross section of the guide groove is a trapezoidal or rectangular structure, which can increase the rigidity and stability of the guide groove, prevent deformation and damage caused by uneven force, extend its service life, and also facilitate the installation and adjustment of the guide wheel assembly.

[0057] Specifically: the guide groove with a trapezoidal or rectangular structure can provide a larger bearing area and higher bending strength, so that the guide groove can withstand a larger load and impact, maintain its shape and size unchanged, and avoid affecting the sliding and alignment of the mold positioning frame due to deformation.

[0058] The guide groove of trapezoidal or rectangular structure can provide a smoother inner surface and a more intuitive appearance, so that the guide wheel assembly can roll smoothly along the guide groove, reduce its friction and wear, and improve its operating efficiency and life. The guide groove of trapezoidal or rectangular structure can provide a more regular cross-sectional shape and a simpler processing technology, so that the guide wheel assembly can be accurately matched and adjusted according to the size and position of the guide groove, ensuring its close fit and coordinated movement with the guide groove.

[0059] The above implementation, the specific working process is: first, put the prepared carbon steel or alloy steel raw materials into the smelting device for melting. When the melt reaches a certain temperature and quality, quantitative feeding is carried out through the secondary feeding box to ensure the quality and temperature of the melt. The structure of the secondary feeding box is shown in the figure, including an external feeding box and a blanking box. A feeding channel is provided between the external feeding box and the blanking box, and a baffle that rotates to open or close is provided in the feeding channel. When feeding is required, the baffle is closed to form an independent box space between the external feeding box and the blanking box; after the feeding is completed, the feeding port of the feeding box is closed, and the baffle is opened to allow the raw materials to fall into the smelting device through the blanking box. After that, multiple forming molds are placed on the mold positioning frame on the continuous casting track device and fixed. More specifically, the continuous casting track device includes a support body, an annular guide frame arranged on the support body, a mold positioning frame slidably arranged on the annular guide frame, a gear transmission assembly for driving the mold positioning frame to rotate, and a motor for driving the gear transmission assembly to rotate. Guide grooves are arranged on both sides of the annular guide frame; at least one guide wheel assembly is arranged on the mold positioning frame and corresponding to the guide groove. A cooling circulating water channel is arranged in the annular guide frame to effectively cool the annular guide frame, extend its service life, and prevent deformation and damage caused by overheating.

[0060] Secondly, start the motor to drive the gear transmission assembly to rotate, thereby driving the mold positioning frame to slide along the annular guide frame. When any molding mold is transported to the bottom of the casting component, the composite casting nozzle is aligned and connected with the molding mold cavity to achieve casting molding. The composite casting nozzle includes a casting acceleration flow channel located inside the sealing block, an intermediate mixing flow channel located inside the sealing block and connected to the outlet of the casting acceleration flow channel, a drainage acceleration pipe connected to the outlet of the intermediate mixing flow channel, and a casting conical pipe connected to the outlet of the drainage acceleration pipe. The diameter of the intermediate mixing flow channel is larger than the outlet diameter of the casting conical pipe; the outlet diameter of the casting conical pipe is larger than the outlet diameter of the drainage acceleration pipe; the diameter of the drainage acceleration pipe is smaller than the diameter of the casting acceleration flow channel.

[0061] Finally, when the melt enters the molding die from the smelting device through the composite casting nozzle, the structural design of the composite casting nozzle can realize the functions of multi-way diversion, mixing, acceleration and guidance, so that the pouring melt can reach a state of uniform distribution, high-speed flow and reasonable direction before entering the molding die, thereby effectively reducing the solidification shrinkage rate and improving the density and mechanical properties of the camshaft casting. When the melt in the molding die solidifies, it is taken out by the discharging device. The discharging device can be a hoisting discharging device or a manipulator.

[0062] In summary, through the above settings, efficient, high-quality and high-speed casting and molding of camshafts can be achieved, production efficiency and product quality can be improved, and production costs and defect rates can be reduced. On the one hand, the automatic circulation and alignment of multiple molding molds can be realized without manual intervention and handling, saving time and manpower, and reducing labor intensity and risks. On the other hand, the functions of multi-way diversion, mixing, acceleration and guidance can be realized, so that the pouring melt can reach a state of uniform distribution, high-speed flow and reasonable direction before entering the molding mold, thereby effectively reducing the solidification shrinkage rate and improving the density and mechanical properties of the camshaft casting; in addition, the use of a smelting device and a secondary feeding box can realize the control and guarantee of the quality and temperature of the melt, and avoid losses and pollution caused by oxidation, splashing and other phenomena during the feeding process. And the use of a discharging device can realize the automatic removal of the solidified camshaft casting, improve production efficiency and safety, and reduce manual operation and errors.

[0063] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A casting track for camshaft casting, characterized in that: The casting track comprises the following steps when casting the camshaft: S100: Put the carbon steel or alloy steel raw material into the smelting device for melting, and use the secondary feeding box for quantitative feeding to ensure the quality and temperature of the melt; S200: laying a plurality of forming molds on the continuous casting track device, and setting a mold positioning frame to slide along the annular guide frame; S300: Start the cooling water circulation channel to effectively cool the annular guide rail frame; S400: Aligning and communicating the composite casting nozzle with the mold cavity of the molding die to achieve casting molding, wherein the composite casting nozzle includes a casting acceleration flow channel, an intermediate mixing flow channel, a drainage acceleration pipeline and a casting conical pipeline; S500: controlling the melt to enter the molding die from the smelting device through the composite casting nozzle, so that the casting melt reaches a state of uniform distribution, high-speed flow and reasonable direction before entering the molding die; S600: After the melt in the molding die solidifies, the solidified camshaft casting is taken out using a discharging device; The casting component includes a sealing block and a composite casting nozzle formed inside the sealing block; The plurality of molding dies are transported to the casting component in the continuous casting track device according to a predetermined path and program control; When any of the molding dies is conveyed to the bottom of the casting component, the casting is realized by aligning and communicating the composite casting nozzle with the molding die cavity.

2. The casting track for camshaft casting according to claim 1, characterized in that: The diameter of the middle mixing flow channel of the composite casting nozzle is larger than the diameter of the casting cone pipe outlet, the diameter of the casting cone pipe outlet is larger than the outlet diameter of the drainage acceleration pipe, and the diameter of the drainage acceleration pipe is smaller than the diameter of the casting acceleration flow channel.

3. The casting track for camshaft casting according to claim 2, characterized in that: The forming mold is transported to the bottom of the casting component on the continuous casting track device according to a predetermined path and program control.

4. A casting track for camshaft casting according to claim 2 or 3, characterized in that: The composite casting nozzle includes a casting acceleration flow channel located inside the sealing block, an intermediate mixing flow channel located inside the sealing block and connected to the outlet of the casting acceleration flow channel, a drainage acceleration pipe connected to the outlet of the intermediate mixing flow channel, and a casting conical pipe connected to the outlet of the drainage acceleration pipe.

5. The casting track for camshaft casting according to claim 1, characterized in that: The diameter of the intermediate mixing channel is larger than the outlet diameter of the casting conical pipe; The outlet diameter of the casting conical pipe is larger than the outlet diameter of the drainage acceleration pipe; The diameter of the drainage acceleration pipeline is smaller than the diameter of the casting acceleration flow channel.

6. The casting track for camshaft casting according to claim 1, characterized in that: A secondary feeding box is sealed at the feeding port of the smelting device; the secondary feeding box includes an external feeding box and a blanking box; a feeding channel is provided between the external feeding box and the blanking box, and a baffle that is rotatably opened or closed is provided in the feeding channel; when feeding is required, the baffle is closed to form an independent box space between the external feeding box and the blanking box; after feeding is completed, the feeding port of the feeding box is closed, and the baffle is opened to allow the raw materials to pass through the blanking box and fall into the smelting device.

7. The casting track for camshaft casting according to claim 1, characterized in that: The outer side of the continuous casting track device is provided with a discharging device of the forming mold.

8. The casting track for camshaft casting according to claim 7, characterized in that: The discharging device is a hoisting discharging device or a manipulator.

9. The casting track for camshaft casting according to claim 3, characterized in that: The cross section of the guide groove is a trapezoidal or rectangular structure.

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