Warm and cold composite forging equipment for rotor of steering gear of passenger car

Abstract

The invention discloses warm-cold composite forging equipment for a steering gear rotor of a passenger car, relates to the technical field of forging equipment, and adopts a warm forging and cold forging composite process to improve the forming quality when the steering gear rotor of the passenger car is formed. The workpiece is heated through the induction furnace, the heated workpiece is placed in the warm forging device, local fluidity is improved by conducting local heating on the surface, with the large curvature, of the outer portion of the workpiece, and therefore forming is convenient, the forming efficiency is improved, and an inner hole of the workpiece is forged while the lug portion is formed. And after warm forging forming, a workpiece is conveyed to an annealing furnace for spheroidizing annealing, heat preservation is conducted, the workpiece is conveyed to a cold forging press machine after being discharged out of the furnace, and the spline is formed through cold extrusion. And quenching is conducted after forming, rapid cooling is conducted, martensite is obtained on the surface of the workpiece, and the surface hardness is improved. And through warm forging and cold press molding, the preparation period is effectively shortened, and the density and strength of the steering gear rotor are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of forging equipment, and particularly to a warm and cold composite forging equipment for a passenger car steering gear rotor. Background Art

[0002] The passenger car steering gear rotor is mainly used in the steering system of a passenger car steering gear. This product has a special shape, with an inner hole, internal cavity with splines, and the outer wall of the rotor is irregular, with six ears.

[0003] Currently, when producing a passenger car steering gear rotor, a round bar machine is mostly used for processing, the outer shape is processed by hobbing, and the splines are processed by shaping. Using this processing technology will greatly affect the rotor life. However, with the increasing requirements for product quality, conventional forming equipment can no longer meet the forming quality requirements for the rotor.

[0004] In addition, due to the special shape of the passenger car steering gear rotor, when a conventional forging equipment is forging, the workpiece is uniformly heated to make the overall plasticity tend to be stable, and then forged into shape, which cannot meet the requirements for the specific shape of the passenger car steering gear rotor. Summary of the Invention

[0005] The purpose of the present invention is to provide a warm and cold composite forging equipment for a passenger car steering gear rotor to solve the problems raised in the prior art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: The forging equipment includes an induction furnace, a warm forging device, a temperature regulating device, an annealing furnace, and a cold forging press. The induction furnace, the warm forging device, the annealing furnace, and the cold forging press are arranged in sequence along the workpiece processing direction. The temperature regulating device is connected to the warm forging device. The warm forging device is used for forging the inner hole and the outer ears of the workpiece. The cold forging press is used for forging the splines of the workpiece. The temperature regulating device is used to increase the temperature of the ears of the workpiece.

[0007] When forming the rotor of a passenger car steering gear in this application, a combined process of warm forging and cold forging is adopted to improve the forming quality. First, a metal bar needs to be cut by a disk saw and shot peened to remove the oxide scale on the surface, and a thin graphite coating is sprayed after heating the blank. The workpiece is heated by an induction furnace, and the heated workpiece is placed in a warm forging device. By locally heating the surface of the workpiece with a relatively large external curvature, the local fluidity is improved, which facilitates forming and improves the forming efficiency. While forming the ears, the inner hole of the workpiece is forged. After warm forging, the workpiece is sent to an annealing furnace for spheroidizing annealing and heat preservation. After being taken out of the furnace, it is sent to a cold forging press, and splines are formed by cold extrusion. After forming, quenching is carried out and rapid cooling is performed to obtain martensite on the surface of the workpiece and improve the surface hardness. Through warm forging and cold pressing forming, the preparation cycle is effectively shortened, and the density and strength of the steering gear rotor are improved.

[0008] Further, the warm forging device includes a bed body, a base, a female die, a male die, and a pressure cylinder. The base is fixedly connected to the bed body. An installation groove is provided on the base, and the female die is placed in the installation groove. The pressure cylinder is fixedly connected to the bed body, and the output end of the pressure cylinder is drivingly connected to the male die. The male die and the female die are adapted to each other. The temperature control device includes a preheating component and a pressure application component. A temperature control cavity is provided on the base, and the preheating component is placed in the temperature control cavity. The preheating component includes resistance sheets, and the resistance sheets are electrically connected to a high-voltage power supply. The female die includes a bottom die and an insert. The bottom die and the insert are respectively placed in the installation groove, the bottom die is located below the insert, and a heat accumulation groove is provided on the insert. The pressure application component is used to adjust the contact area between the resistance sheet and the heat accumulation groove.

[0009] The bed body serves as the main supporting foundation for installing other components. The base is fixed on the surface of the bed body, and an installation groove is provided thereon for installing the female die. The pressure cylinder is installed on the bed body, and its output end is connected to the male die. The pressure cylinder is used to provide linear displacement and drive the male die to move vertically. The male die and the female die cooperate to forge the inner hole and the ear part of the workpiece. During the initial processing, the female die is preheated by a preheating component. The high-voltage power supply energizes the resistance sheet. The resistance sheet generates heat when energized and contacts the insert block. The insert block contacts the bottom die, and through contact heat transfer, the temperature of the female die itself is increased, preventing the workpiece from causing temperature drop when placed in the female die, resulting in local temperature reduction and affecting the local forging performance. The female die adopts a combined design of a bottom die and several insert blocks, which can effectively improve the overall strength and hardness, ensure the product yield rate, and also extend the service life of the whole die. At the same time, with the combined design, it is more convenient to replace the worn parts. The formed steering gear rotor has a spline cavity in the inner cavity and an irregular outer wall with six ears. By setting a pressure application component, the resistance sheet is driven to deform. After the resistance sheet deforms, the surface curvature of the conductor changes, and electric field concentration occurs at the place with a larger curvature, thereby enhancing the local current density. The increase in current density causes a larger local temperature rise, thereby adjusting the contact area between the resistance sheet and the heat accumulation groove; at the same time, when hot forging steering gear rotors of different specifications, due to different ear curvatures, the deformation rate of the resistance sheet is adjusted by the pressure application component, thereby changing the contact area between the resistance sheet and the heat accumulation groove and adjusting the heat exchange efficiency. The larger the ear curvature, the greater the deformation degree of the resistance sheet, the larger the contact area with the heat accumulation groove, and the higher the heat exchange efficiency, so that the heating temperature of the workpiece through the insert block is higher, the plasticity of the part with a large curvature increases, and the hot forging efficiency and hot forging quality are improved.

[0010] Furthermore, the preheating component further includes a fixing ring. There are several resistance sheets, and the resistance sheets are provided with brackets extending outward. The pressure application component includes a pressure application motor and a pressing block. The pressure application motor is fixedly connected to the fixing ring, the output end of the pressure application motor is fixedly connected to the pressing block, the pressing block is arc-shaped, the outer curvature of the pressing block is gradually changed, and a transmission groove is provided on the pressing block. The end of the bracket away from the resistance sheet is inserted into the transmission groove.

[0011] The fixing ring is set to install the pressure application motor. The output end of the pressure application motor is connected to the pressing block for driving the pressing block to rotate. The pressing block is arranged in an arc shape with a gradually changing curvature. During the rotation process, the bracket is inserted into the transmission groove, and the resistance sheet is driven to deform into the heat accumulation groove through transmission, thereby increasing the local contact area; when rotating in the reverse direction, the resistance sheet is driven to deform outward, reducing the contact area with the heat accumulation groove.

[0012] Furthermore, a spherical surface is provided at the end of the bracket inserted into the transmission groove. By setting the spherical surface, the sliding of the end of the bracket in the transmission groove is smoother, improving the transmission smoothness.

[0013] Further, the preheating component further includes a lifting cylinder disposed in the temperature adjusting cavity. The output end of the lifting cylinder is fixedly connected to the fixing ring, and the fixing ring is slidably connected to the temperature adjusting cavity.

[0014] Through the lifting cylinder, during the initial temperature adjustment, the bottommost part of the insert can be heated, improving the warm forging forming efficiency of the lower part of the workpiece, facilitating the filling of the female die, and improving the forming quality. As the bottom gradually forms, the lifting cylinder outputs a vertical displacement, driving the fixing ring to move upward, thereby performing step-by-step warm forging forming and avoiding the appearance of air pockets at the bottom, which may affect the forming quality.

[0015] Further, the cross-section of the heat accumulation groove is arranged in a fan shape. By setting the cross-section in a fan shape, the cross-section is smaller closer to the axis line, facilitating the adjustment of the insertion depth when the pressing block rotates, thereby adjusting the contact area between the resistance sheet and the heat accumulation groove and adjusting the heat exchange efficiency.

[0016] Further, pressure application motors are respectively provided on both sides of the fixing ring. By providing pressure application motors on both sides, they are used to drive the pressing blocks, that is, driving the same resistance sheet to deform through two pressing blocks. Through double-end transmission, the transmission efficiency is improved.

[0017] Further, the warm forging device further includes an ejection cylinder. An ejection groove is provided on the base, and the ejection cylinder is disposed in the ejection groove with the middle part of the bottom die being penetrated. By providing the ejection cylinder and disposing it in the ejection groove, after the workpiece is warm forged and formed, the output end of the ejection cylinder passes through the through hole in the middle of the bottom die to eject the formed workpiece, facilitating continuous forging forming.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: The female die adopts a combined design of a bottom die and several inserts, which can effectively improve the overall strength and hardness, ensure the product yield, and also extend the service life of the entire die. At the same time, with the combined design, it is more convenient to replace the worn parts; by setting the pressure application component to drive the deformation of the resistance sheet, after the resistance sheet deforms, the surface curvature of the conductor changes, and electric field concentration occurs at the place with a larger curvature, thereby enhancing the local current density. As the current density increases, the local temperature rise increases, thereby adjusting the contact area between the resistance sheet and the heat accumulation groove; at the same time, when warm forging different specifications of steering gear rotors, due to different ear curvatures, the deformation rate of the resistance sheet is adjusted through the pressure application component, thereby changing the contact area between the resistance sheet and the heat accumulation groove and adjusting the heat exchange efficiency. The larger the ear curvature, the greater the deformation degree of the resistance sheet, the larger the contact area with the heat accumulation groove, and the higher the heat exchange efficiency, so that the heating temperature of the workpiece through the insert is higher, the plasticity of the part with a large curvature increases, and the warm forging efficiency and warm forging quality are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the structural schematic diagram of the warm forging device of the present invention; Figure 3 Schematic diagram of the base structure of the present invention; Figure 4 Half-sectional view of the base of the present invention; Figure 5 Schematic diagram of the temperature control device structure of the present invention; Figure 6 Schematic diagram of the insert block structure of the present invention; Figure 7 Schematic diagram of the passenger car steering gear rotor structure of the present invention.

[0020] In the figure: 1. Induction furnace; 2. Warm forging device; 21. Bed; 22. Base; 221. Installation groove; 222. Temperature control cavity; 223. Ejection groove; 23. Female die; 231. Bottom die; 232. Insert block; 2321. Heat accumulation groove; 24. Male die; 25. Pressure cylinder; 26. Ejection cylinder; 3. Temperature control device; 31. Preheating component; 311. Resistance sheet; 312. Fixed ring; 313. Lifting cylinder; 314. Support; 32. Pressing component; 321. Pressing motor; 322. Pressing block; 3221. Transmission groove; 4. Annealing furnace; 5. Cold forging press. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Embodiment: As Figures 1-7 shown, the present invention provides a technical solution for a warm and cold composite forging equipment for a passenger car steering gear rotor.

[0023] The forging equipment includes an induction furnace 1, a warm forging device 2, a temperature control device 3, an annealing furnace 4 and a cold forging press 5. The induction furnace 1, the warm forging device 2, the annealing furnace 4 and the cold forging press 5 are arranged in sequence along the workpiece processing direction. The temperature control device 3 is connected to the warm forging device 2. The warm forging device 2 is used for forging the inner hole and the outer ear of the workpiece. The cold forging press 5 is used for forging the spline of the workpiece. The temperature control device 3 is used for increasing the temperature of the ear of the workpiece.

[0024] When forming the rotor of a passenger car steering gear in this application, a combined process of warm forging and cold forging is adopted to improve the forming quality. First, a metal bar needs to be cut by a disk sawing machine and subjected to shot peening treatment to remove the oxide scale on the surface, and a thin graphite coating is sprayed after heating the blank. The workpiece is heated by an induction furnace 1, and the heated workpiece is placed into a warm forging device 2. By locally heating the surface of the workpiece with a relatively large external curvature, the local fluidity is improved, which facilitates forming and improves the forming efficiency. While forming the ear part, the inner hole of the workpiece is forged. After warm forging forming, the workpiece is sent to an annealing furnace 4 for spheroidizing annealing and heat preservation. After being taken out of the furnace, it is sent to a cold forging press 5, and splines are formed by cold extrusion. After forming, quenching is carried out and rapid cooling is performed to obtain martensite on the surface of the workpiece, thereby increasing the surface hardness. Through warm forging and cold pressing forming, the preparation cycle is effectively shortened, and the density and strength of the steering gear rotor are improved.

[0025] Furthermore, the warm forging device 2 includes a bed body 21, a base 22, a female die 23, a male die 24, and a pressure cylinder 25. The base 22 is fixedly connected to the bed body 21. An installation groove 221 is provided on the base 22. The female die 23 is placed in the installation groove 221. The pressure cylinder 25 is fixedly connected to the bed body 21. The output end of the pressure cylinder 25 is in transmission connection with the male die 24, and the male die 24 is adapted to the female die 23. The temperature control device 3 includes a preheating component 31 and a pressure application component 32. A temperature control cavity 222 is provided on the base 22. The preheating component 31 is placed in the temperature control cavity 222. The preheating component 31 includes a resistance sheet 311, and the resistance sheet 311 is electrically connected to a high-voltage power supply. The female die 23 includes a bottom die 231 and an insert 232. The bottom die 231 and the insert 232 are respectively placed in the installation groove 221. The bottom die 231 is located below the insert 232. A heat accumulation groove 2321 is provided on the insert 232. The pressure application component 32 is used to adjust the contact area between the resistance sheet 311 and the heat accumulation groove 2321.

[0026] The bed 21 is used as the main supporting foundation for installing other components. The base 22 is fixed on the surface of the bed 21, and a mounting groove 221 is set thereon for installing the die 23. The pressure cylinder 25 is installed on the bed 21, and the output end is connected to the punch 24. The pressure cylinder 25 is used to provide linear displacement, driving the punch 24 to move vertically. The punch 24 and the die 23 cooperate to forge the inner hole and the ear of the workpiece. During the initial processing, the die 23 is preheated by the preheating component 31, and the high-voltage power supply is energized to the resistor 311. The resistor 311 is energized to generate heat and contact with the insert 232. The insert 232 is in contact with the bottom die 231. Through contact heat transfer, the temperature of the die 23 itself is increased to prevent the workpiece from causing a temperature drop when it is placed in the die 23, resulting in a local temperature drop and affecting the local forging performance. The concave mold 23 adopts a combined design of a bottom mold 231 and several inserts 232, which can effectively improve the overall strength and hardness, ensure the yield rate of the product, and extend the service life of the entire mold. At the same time, the combined design makes it easier to replace the worn parts. The inner cavity of the molded steering gear rotor has splines, and the outer wall is special-shaped with six ears. By setting a pressure component 32, the resistor 311 is driven to deform. After the resistor 311 is deformed, the curvature of the conductor surface changes, and the electric field is concentrated where the curvature is larger, thereby enhancing the local current density. The increase in current density increases the local temperature rise, thereby adjusting the contact area between the resistor 311 and the heat accumulation groove 2321; at the same time, when warm forging of steering gear rotors of different specifications, due to the different ear curvatures, the deformation rate of the resistor 311 is adjusted by the pressure component 32, thereby changing the contact area between the resistor 311 and the heat accumulation groove 2321 and adjusting the heat exchange efficiency. The larger the ear curvature, the greater the deformation degree of the resistor 311, the larger the contact area between the resistor 311 and the heat accumulation groove 2321, and the higher the heat exchange efficiency, so that the heating temperature of the workpiece through the insert 232 is higher, the plasticity of the part with a large curvature is increased, and the warm forging efficiency and warm forging quality are improved.

[0027] Furthermore, the preheating component 31 also includes a fixing ring 312, a plurality of resistors 311 are provided, and a bracket 314 is extended outward from the resistor 311. The pressure component 32 includes a pressure motor 321 and a crimping block 322. The pressure motor 321 and the fixing ring 312 are tightly connected, and the output end of the pressure motor 321 and the crimping block 322 are tightly connected. The crimping block 322 is arranged in an arc shape, and the outer ring curvature of the crimping block 322 is gradually arranged. A transmission groove 3221 is provided on the crimping block 322, and the bracket 314 is inserted into the transmission groove 3221 at one end away from the resistor 311.

[0028] The pressing motor 321 is installed by setting the fixed ring 312. The output end of the pressing motor 321 is connected to the crimping block 322, which is used to drive the crimping block 322 to rotate. The crimping block 322 is arranged in an arc shape with a gradually changing curvature. During rotation, the bracket 314 is inserted into the transmission groove 3221, and through transmission, the resistance sheet 311 is deformed into the heat accumulation groove 2321, thereby increasing the local contact area; when rotating in the reverse direction, the resistance sheet 311 is driven to deform outward, reducing the contact area with the heat accumulation groove 2321.

[0029] Furthermore, one end of the bracket 314 inserted into the transmission groove 3221 is provided with a spherical surface. By setting the spherical surface, the sliding of the end of the bracket 314 in the transmission groove 3221 is smoother, improving the transmission smoothness.

[0030] Furthermore, the preheating assembly 31 further includes a lifting cylinder 313. The lifting cylinder 313 is placed in the temperature adjustment cavity 222. The output end of the lifting cylinder 313 is fixedly connected to the fixed ring 312, and the fixed ring 312 is slidably connected to the temperature adjustment cavity 222.

[0031] Through the lifting cylinder 313, when performing preliminary temperature adjustment, the bottom of the insert block 232 can be heated, improving the warm forging forming efficiency of the lower part of the workpiece, facilitating the filling of the female die, and improving the forming quality. As the bottom is gradually formed, the lifting cylinder 313 outputs a vertical displacement, driving the fixed ring 312 to move upward, thereby performing step-by-step warm forging forming and avoiding the appearance of air pockets at the bottom, which affects the forming quality.

[0032] Furthermore, the cross-section of the heat accumulation groove 2321 is arranged in a fan shape. Through the fan-shaped cross-section setting, the cross-section is smaller closer to the axis line, which is convenient for adjusting the insertion depth when the crimping block 322 rotates, thereby adjusting the contact area between the resistance sheet 311 and the heat accumulation groove 2321 and adjusting the heat exchange efficiency.

[0033] Furthermore, pressing motors 321 are respectively arranged on both sides of the fixed ring 312. By arranging the pressing motors 321 on both sides, they are used to drive the crimping block 322, that is, the same resistance sheet 311 is deformed by the two crimping blocks 322, and the transmission efficiency is improved through double-end transmission.

[0034] Furthermore, the warm forging device 2 further includes an ejection cylinder 26. An ejection groove 223 is provided on the base 22. The ejection cylinder 26 is placed in the ejection groove 223, and the middle part of the bottom die 231 is provided with a through hole. By setting the ejection cylinder 26 and placing it in the ejection groove 223, after the workpiece is warm forged and formed, the output end of the ejection cylinder 26 passes through the through hole in the middle of the bottom die 231 to eject the formed workpiece, facilitating continuous forging forming.

[0035] Working principle of the present invention: The female die 23 adopts a combined design of a bottom die 231 and a number of inserts 232, which can effectively improve the overall strength and hardness, ensure the product yield, and also extend the service life of the whole die. At the same time, with the combined design, it is more convenient to replace the worn parts; by setting a pressing component 32 to drive the deformation of the resistance piece 311, after the resistance piece 311 deforms, the surface curvature of the conductor changes, and electric field concentration occurs at the place with a larger curvature, thereby enhancing the local current density. As the current density increases, the local temperature rise increases, thereby adjusting the contact area between the resistance piece 311 and the heat accumulation groove 2321; at the same time, when performing warm forging of steering gear rotors of different specifications, due to different ear curvatures, the deformation rate of the resistance piece 311 is adjusted through the pressing component 32, thereby changing the contact area between the resistance piece 311 and the heat accumulation groove 2321 and adjusting the heat exchange efficiency. The larger the ear curvature, the greater the deformation degree of the resistance piece 311, the larger the contact area with the heat accumulation groove 2321, and the higher the heat exchange efficiency, so that the heating temperature of the workpiece by the insert 232 is higher, the plasticity of the part with a large curvature increases, and the warm forging efficiency and warm forging quality are improved.

[0036] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A warm and cold composite forging equipment for a passenger car steering gear rotor, characterized in that: The forging equipment comprises an induction furnace (1), a warm forging device (2), a temperature regulating device (3), an annealing furnace (4) and a cold forging press (5); the induction furnace (1), the warm forging device (2), the annealing furnace (4) and the cold forging press (5) are arranged in sequence along a workpiece processing direction; the temperature regulating device (3) is connected to the warm forging device (2); the warm forging device (2) is used to forge an inner hole and an outer ear of a workpiece; the cold forging press (5) is used to forge a spline of the workpiece; and the temperature regulating device (3) is used to increase the temperature of the workpiece ear.

2. The warm and cold composite forging equipment for a passenger car steering gear rotor according to claim 1, characterized in that: The warm forging device (2) comprises a bed (21), a base (22), a die (23), a punch (24) and a pressure cylinder (25); the base (22) and the bed (21) are tightly connected; a mounting groove (221) is provided on the base (22); the die (23) is placed in the mounting groove (221); the pressure cylinder (25) and the bed (21) are tightly connected; an output end of the pressure cylinder (25) is drivingly connected to the punch (24); and the punch (24) and the die (23) are adapted to fit; The temperature regulating device (3) comprises a preheating component (31) and a pressure component (32); a temperature regulating cavity (222) is provided on the base (22); the preheating component (31) is placed in the temperature regulating cavity (222); the preheating component (31) comprises a resistor (311); the resistor (311) is electrically connected to a high-voltage power supply; the concave mold (23) comprises a bottom mold (231) and an insert (232); the bottom mold (231) and the insert (232) are respectively placed in the mounting groove (221); the bottom mold (231) is located at the lower side of the insert (232); a heat accumulation groove (2321) is provided on the insert (232); and the pressure component (32) is used to adjust the contact area between the resistor (311) and the heat accumulation groove (2321).

3. The warm and cold composite forging equipment for a passenger car steering gear rotor according to claim 2, characterized in that: The preheating component (31) further comprises a fixing ring (312), a plurality of resistor sheets (311) are provided, a bracket (314) is provided on the resistor sheet (311) and extends outwardly, the pressure component (32) comprises a pressure motor (321) and a crimping block (322), the pressure motor (321) and the fixing ring (312) are tightly connected, the output end of the pressure motor (321) and the crimping block (322) are tightly connected, the crimping block (322) is arranged in an arc shape, the outer ring of the crimping block (322) has a gradually changing curvature, a transmission groove (3221) is provided on the crimping block (322), and the bracket (314) is inserted into the transmission groove (3221) at one end away from the resistor sheet (311).

4. The warm and cold composite forging equipment for a passenger car steering gear rotor according to claim 3 is characterized in that: A spherical surface is provided on one end of the bracket (314) inserted into the transmission groove (3221).

5. The warm and cold composite forging equipment for a passenger car steering gear rotor according to claim 4, characterized in that: The preheating assembly (31) further comprises a lifting cylinder (313), wherein the lifting cylinder (313) is disposed in the temperature adjustment chamber (222), wherein an output end of the lifting cylinder (313) is tightly connected to a fixing ring (312), and wherein the fixing ring (312) is slidably connected to the temperature adjustment chamber (222).

6. The warm and cold composite forging equipment for a passenger car steering gear rotor according to claim 5, characterized in that: The cross section of the heat storage groove (2321) is arranged in a fan shape.

7. The warm and cold composite forging equipment for a passenger car steering gear rotor according to claim 6, characterized in that: Pressure motors (321) are respectively provided on both sides of the fixing ring (312).

8. The warm and cold composite forging equipment for a passenger car steering gear rotor according to claim 7, characterized in that: The warm forging device (2) further comprises an ejector cylinder (26), an ejector groove (223) is provided on the base (22), the ejector cylinder (26) is placed in the ejector groove (223), and the middle part of the bottom mold (231) is provided through.

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