A hot spinning processing device for an air reducing piston

Abstract

The present invention relates to the technical field of air shock absorber piston processing, and particularly to a hot spinning processing device for an air shock absorber piston. A torch heats the workpiece clamped and fixed, and after the side wall of the workpiece is softened, a spinning head rotates and extrudes the workpiece. During the processing of the spinning head, the pressure of the spinning head is detected through a pressure sensor arranged in contact, and the change in the resistance given by the workpiece to the spinning head is fed back in real time to determine the softening degree of the workpiece and the cutting force of the spinning head. Furthermore, the cutting force of the spinning head is detected by using the pressure sensor, and the heat softening degree of the workpiece is monitored in real time, and then the heating intensity of the workpiece is determined to ensure that the softening degree of the workpiece is moderate and the chip cutting force of the spinning head is moderate, thereby improving the processing accuracy of the air shock absorber piston, increasing the qualified rate of the finished products of the air shock absorber piston, and saving costs.

Description

Technical Field

[0001] The present invention relates to the technical field of air shock piston processing, and particularly to a hot spinning processing device for an air shock piston. Background Art

[0002] An air shock piston, abbreviated as an air shock piston, is one of the important components of an automobile. The air shock piston manufactured by the spinning process has the advantages of good mechanical properties, good safety, beautiful appearance and material saving of the product, and is becoming the development direction of the modern automobile shock piston manufacturing process. At present, in the automotive field, the requirement for lightweight is getting higher and higher. The shock absorber made of aluminum alloy can reduce the weight of the vehicle body and greatly reduce fuel consumption.

[0003] Since the wall thickness of some air shock piston cylinders is too thick and the local dimensions change greatly, and the precision requirements for some dimensions are relatively high, it is difficult to complete the processing by the traditional cold spinning process, so the hot spinning process needs to be adopted. In the general hot spinning process, the workpiece is heated to a molten state by a flame for processing, while the spinning of the piston cylinder is carried out by heating the metal to a slightly softened range. If the temperature is lower than this range, the tool wear is serious and the precision cannot meet the requirements. If the temperature is higher than this range, the workpiece is severely softened and undergoes overall deformation. At present, this method controls the temperature during the processing by a worker holding a flame gun based on his own experience, with slow efficiency, high rejection rate, and high technical requirements for workers.

[0004] For example, a rim forming die and a coupled heating spinning method disclosed in a Chinese patent with the patent application number 202411244719.X, belonging to the technical field of metal casting, includes a die body, a spinning wheel and a heating component. The die body includes a lower die and an upper die, and a plurality of movable blocks are circumferentially arranged on the upper end surface of the lower die; the spinning wheel is arranged on one side of the die body, and the contact surface of the spinning wheel in the working state with the rim is the spinning surface; the heating component includes a plurality of spray guns and a semi-circular heating chamber, the semi-circular heating chamber is coaxially arranged around the side of the die body away from the spinning wheel, and a partition plate divides the flame spraying holes into upper spraying holes and lower spraying holes from top to bottom, and the flames ejected from the upper spraying holes and the lower spraying holes form an overlapping coupled heating area on the outer side wall of the rim to cover the spinning surface.

[0005] Although the above technical solution can perform targeted hot spinning processing on the rim, when this technical solution is applied to the processing of air shock pistons, there is still a problem of lack of processing precision caused by inconsistent heating and softening degrees of the workpiece. Therefore, there is an urgent need for a hot spinning processing technical solution applicable to air shock pistons. Summary of the Invention

[0006] In view of the above problems, the present invention provides a hot spinning processing device for an air reduction piston. By setting a pressure sensor, the cutting force of the spinning head is detected by the pressure sensor, and the heat softening degree of the workpiece is monitored in real time, so as to determine the heating intensity of the workpiece, ensure that the softening degree of the workpiece is appropriate and the cutting force of the spinning head is appropriate, thereby improving the processing accuracy of the air reduction piston, increasing the qualified rate of the finished product of the air reduction piston, and saving costs.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A hot spinning processing device for an air reduction piston. A blowtorch heats the clamped and fixed workpiece. After the side wall of the workpiece is softened, the spinning head rotates and extrudes the workpiece. During the processing of the spinning head, the pressure of the spinning head is detected by a pressure sensor arranged in contact, and the resistance change given by the workpiece to the spinning head is fed back in real time to determine the softening degree of the workpiece and the cutting force of the spinning head.

[0009] As an improvement, the spinning heads are symmetrically arranged on both circumferential sides of the workpiece, and the spinning heads approach the workpiece synchronously for spinning processing.

[0010] As an improvement, when the blowtorch heats the workpiece, the temperature is monitored by a temperature sensor on one side of the blowtorch.

[0011] As an improvement, a proportional valve for controlling the flame size is arranged on the blowtorch, and the proportional valve is electrically connected to the temperature sensor.

[0012] As an improvement, the bottom of the workpiece is clamped and fixed by a three-jaw chuck, and the three-jaw chuck is rotatable by itself.

[0013] As an improvement, at the top of the workpiece, a top rod arranged in a lifting manner is inserted into the workpiece to tightly hold the workpiece.

[0014] As an improvement, the top rod is integrally arranged.

[0015] As an improvement, the top rod is split. The top rod includes a plurality of side top rods arranged in a circumferential array. The side top rods are expandable and contractible and are arranged to tightly hold the side wall of the workpiece.

[0016] As an improvement, it further includes: an upper pressing plate, which presses the upper edge of the workpiece, and the upper pressing plate is linked with the side top rods. When the side top rods contract, the upper pressing plate rises, and when the side top rods expand, the upper pressing plate descends.

[0017] As an improvement, the side top rods are synchronously adjusted by an adjusting component arranged at the central position to adjust the lateral tightening force of the side top rods on the side wall of the workpiece and the lifting height of the upper pressing plate.

[0018] The beneficial effects of the present invention are as follows:

[0019] (1) By setting a pressure sensor, the present invention detects the cutting force of the spinning head using the pressure sensor, monitors the heat-softening degree of the workpiece in real time, and then determines the heating intensity of the workpiece, ensuring that the softening degree of the workpiece is moderate and the chip force of the spinning head is moderate. This improves the processing accuracy of the air reduction piston, increases the qualified rate of the finished product of the air reduction piston, and saves costs.

[0020] (2) By setting a temperature sensor in cooperation with a proportional valve, the present invention can automatically adjust the flame size of the torch, detect and adjust the situation of the workpiece in the processing process in real time, form a closed-loop system, and make the temperature more accurate and controllable.

[0021] (3) By designing a split-type ejector rod, during the spinning process of the workpiece, the entire side wall of the workpiece is supported in real time, avoiding the shaking and dislocation of the workpiece caused by the spinning force. The ejector rod can well ensure that the workpiece undergoes plastic deformation according to the preset trajectory and size, avoiding dimensional deviation and irregular shape caused by the movement of the workpiece.

[0022] (4) By setting an upper pressing plate, the present invention compresses and sets the upper edge of the workpiece using the upper pressing plate, avoiding the distortion of the processing dimension accuracy caused by the stress rebound of the material itself during the cooling and shaping process of the spun workpiece, improving the dimensional accuracy of the air reduction piston. And the upper pressing plate can be adjusted in real time with the side top plate. During the spinning process, the upper pressing plate automatically rises and disengages from the workpiece, thereby avoiding interference with the spinning head during spinning and having high processing accuracy.

[0023] In summary, the present invention has the advantages of high automation degree, high processing accuracy, high finished product rate, low processing cost, good temperature control effect, etc., and is especially suitable for the processing technology field of air shock pistons. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional structure schematic diagram of the present invention;

[0025] Figure 2 is a three-dimensional structure schematic diagram of the spinning assembly of the present invention;

[0026] Figure 3 is a three-dimensional schematic diagram of the heating assembly of the present invention;

[0027] Figure 4 is a three-dimensional structure schematic diagram of the pressure monitoring assembly of the present invention;

[0028] Figure 5 is a three-dimensional structure schematic diagram of the split-type ejector rod of the present invention Figure 1 ;

[0029] Figure 6Front view structural schematic diagram of the split ejector rod of the present invention;

[0030] Figure 7 is Figure 6 Enlarged structural schematic diagram at position A in

[0031] Figure 8 Cross-sectional structural schematic of the split ejector rod of the present invention Figure 1 ;

[0032] Figure 9 Cross-sectional structural schematic of the split ejector rod of the present invention Figure 2 ;

[0033] Figure 10 Three-dimensional structural schematic of the split ejector rod of the present invention Figure 2 .

[0034] Reference numerals in the figure: workpiece 10, spinning assembly 100, spinning head 110, three-jaw chuck 120, ejector rod 130, side ejector rod 131, upper pressure plate 132, limit ring 1321, adjustment assembly 133, adjustment motor 1331, guide rod 1332, mandrel 134, articulated arm 135, sliding sleeve 136, gear unit 137, spring member 138, lead screw nut 139, lifting module 140, heating assembly 200, torch fixing block 210, torch 220, temperature sensor 230, torch lifting module 240, torch transverse module 250, pressure monitoring assembly 300, pressure plate 301, fixing plate 330, guide shaft 340, spring 350, linear bearing 360, fixed stop 370, pressure sensor 320. Detailed implementation manners

[0035] 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 of 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.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0038] Embodiment 1:

[0039] As Figures 1 - 4 shown, in a hot spinning processing device for an air-reducing piston, a torch 220 heats a workpiece 10 clamped and fixed. After the side wall of the workpiece 10 is softened, a spinning head 110 performs rotary extrusion processing on the workpiece 10. During the processing of the spinning head 110, the pressure of the spinning head 110 is detected by a pressure sensor 320 arranged in contact, and the resistance change of the workpiece 10 acting on the spinning head 110 is fed back in real time to determine the softening degree of the workpiece 10 and the cutting force of the spinning head 110.

[0040] Wherein, the spinning heads 110 are symmetrically arranged on both circumferential sides of the workpiece 10, and the spinning heads 110 approach the workpiece 10 synchronously for spinning processing.

[0041] When the torch 220 heats the workpiece 10, a temperature sensor 230 on one side of the torch 220 monitors the temperature.

[0042] A proportional valve for controlling the flame size is arranged on the torch 220, and the proportional valve is electrically connected to the temperature sensor 230.

[0043] Specifically, although existing hot spinning processing devices can monitor the temperature of the workpiece during spinning through temperature sensors or infrared induction, due to the interference of the torch flame on the temperature sensors and infrared induction, the temperature of the detected workpiece is often distorted, further resulting in inconsistent data between the actual softening degree of the workpiece and the softening degree of the workpiece obtained by detection. This also causes the frequent occurrence of the two extreme situations of workpiece processing deformation and increased wear of the spinning head mentioned in the background art of this application.

[0044] Preferably, in this application, a fixed pressure sensor 320 is arranged on the spinning path of the spinning head 110 to visualize the cutting force of the spinning head 110. By inferring the softening degree of the workpiece 10 from the change in the cutting force of the spinning head 110, real-time controllable adjustment of the wear state of the spinning head 110 and the softening degree of the workpiece heated is achieved.

[0045] Specifically, the two groups of spinning heads 110 cooperate with the mounting seat to form a spinning assembly 100. The spinning assembly 100 is driven by the lifting module 140 to be lifted and lowered vertically (i.e., the axial direction of the workpiece 10). The lifting module 140 is preferably a linear slide module, and the spinning head 110 is driven by the bidirectional linear modules arranged along the radial direction of the workpiece 10 to move toward each other in the horizontal direction to perform spinning and perform spinning on the workpiece 10. The bidirectional linear modules are installed on the lifting slide of the lifting module 140, and a pressure plate 301 is provided on the mounting seat of any group of the spinning heads 110. The pressure plate 301 moves with the corresponding spinning head 110 and collides with the pressure sensor 320 installed on the lifting slide and located on the travel route of the spinning head 110. As the spinning head 110 moves, the pressure sensor 320 will read the pressure value given to the pressure sensor 320 by the spinning head 110 in real time.

[0046] Specifically, in addition to the pressure plate 301 and the pressure sensor 320, the pressure monitoring assembly 300 for monitoring the spinning head 110 also includes a fixed plate 330, a guide shaft 340, a spring 350, a linear bearing 360 and a fixed block 370, wherein the pressure sensor 320 and the fixed block 370 are fixed on the guide shaft 340, the guide shaft 340 passes through the linear bearing 360, and is fixed to the lifting module 140 through the fixed plate 330, the pressure plate 301 is fixed on the spinning head 110, and the pressure plate 301 is brought into contact with the pressure sensor 320 through the movement of the spinning head 110 to obtain the resistance encountered by the spinning head during the spinning process.

[0047] Pressure sensor 320 is preferably a strain gauge pressure sensor, primarily composed of an elastic sensitive element and a strain gauge. The elastic sensitive element deforms under pressure. The strain gauge is attached to the surface of the elastic sensitive element. When pressure acts on the elastic sensitive element, it elastically deforms, generating strain on the surface. The attached strain gauge deforms as the elastic element deforms, causing its resistance to change. According to Hooke's law, within the elastic range, strain is proportional to the applied pressure, while the change in resistance of the strain gauge is proportional to the strain. A measurement circuit (such as a Wheatstone bridge) converts the resistance change into a voltage or current signal, thereby enabling pressure measurement.

[0048] Further, it should be noted that the standard pressure value of the pressure sensor 320 has been obtained through experiments. The standard pressure value is the pressure value detected by the pressure sensor 320 during the spinning process of the workpiece 10 by the spinning head 110 under the best softening state of the workpiece 10. Subsequently, when the spinning head 110 spins the workpiece 10, with this standard pressure value as a reference, when the pressure value measured by the pressure sensor 320 is less than the standard pressure value, it indicates that the workpiece 10 is insufficiently heated, the softening degree of the workpiece 10 is insufficient, and the reaction force of the workpiece 10 on the spinning head 110 is greater than the standard state, thereby resulting in a relatively small pressure value measured by the pressure sensor 320. On the contrary, when the pressure value measured by the pressure sensor 320 is greater than the standard pressure value, it indicates that the workpiece 10 is overheated, the softening degree of the workpiece 10 is excessive, and the reaction force of the workpiece 10 on the spinning head 110 is less than the standard state, thereby resulting in a relatively large pressure value measured by the pressure sensor 320.

[0049] Furthermore, when the pressure value detected by the pressure sensor 320 deviates from the standard pressure value, the pressure sensor 320 transmits a signal to the processor. After receiving the signal, the processor transmits a control signal to the proportional valve, and the proportional valve adjusts to regulate the flame size of the torch 220, achieving the purpose of adjusting the softening degree of the workpiece 10.

[0050] Moreover, a temperature sensor 230 provided at the torch 220 detects the flame temperature of the torch 220, reflecting the real-time temperature of the torch 220, and cooperating with the pressure sensor 320 to achieve the purpose of precise temperature control.

[0051] Furthermore, it should be noted that the torch 220 and the temperature sensor 230 are both installed on the slide of the torch horizontal module 250 through the torch fixing block 210, and the torch horizontal module 250 is installed on the slide of the torch lifting module 240. The torch horizontal module 250 drives the torch fixing block 210 to move in the horizontal direction perpendicular to the moving direction of the vertical two-way linear module, and the torch lifting module 240 drives the torch to move in the axial direction of the workpiece 10. The torch 220, the temperature sensor 230, the torch fixing block 210, the torch lifting module 240, and the torch horizontal module 250 are combined to form the heating assembly 200.

[0052] In addition, the proportional valve is preferably a proportional flow valve, which adjusts the opening degree of the valve core by changing the input electrical signal, thereby controlling the flow rate of the combustion medium passing through the valve and achieving the purpose of controlling the flame size of the torch.

[0053] Embodiment 2:

[0054] The difference between Embodiment Two and Embodiment One of the present invention is described with reference to Embodiment One:

[0055] AsFigure 2 , Figures 5 - 10 As shown, the bottom of the workpiece 10 is clamped and fixed by a three-jaw chuck 120. The three-jaw chuck 120 is set to rotate automatically by an electric spindle arranged below, so that the workpiece 10 rotates automatically. When the workpiece 10 is heated by the heating component 200 and spun by the spinning component 100, the workpiece 10 rotates through the electric spindle.

[0056] Further, the top of the workpiece 10 is inserted into the workpiece 10 by a lifting ejector rod 130 to tightly hold the workpiece 10. The ejector rod 130 is lifted and lowered by a hydraulic cylinder. Wherein, the ejector rod 130 can be integrally formed or separately formed.

[0057] When the ejector rod 130 is integrally formed, the ejector rod 130 is a solid rod-shaped rod.

[0058] When the ejector rod 130 is separately formed, the ejector rod 130 includes a plurality of side ejector rods 131 arranged in a circumferential array. The side ejector rods 131 are expanded and contracted to tightly hold the side wall of the workpiece 10.

[0059] Specifically, when the ejector rod 130 is separately formed, it includes a core shaft 134 at the center. The side ejector rods 131 are arranged in a circumferential equidistant array around the core shaft 134, and the side ejector rods 131 are all connected to a sliding sleeve 136 through a hinge arm 135. There are two sets of sliding sleeves 136 respectively, and the sliding sleeves 136 are respectively sleeved on the upper and lower ends of the core shaft 134. A gear unit 137 that meshes with each other is arranged at the hinge joint of the hinge arm 135. A spring member 138 is arranged on the sliding sleeve 136 at the lower end of the core shaft 134, and the spring member 138 is connected to a lead screw nut 139 that is threadedly fitted on the middle part of the core shaft 134.

[0060] Initially, the spring member 138 is in a stretched state. The restoring force formed after the spring member 138 is stretched acts on the lower hinge arm 135. The lower hinge arm 135, through the cooperation of the gear unit 137, also affects the upper hinge arm 135, so that the hinge arm 135 obtains a tendency force, trying to reduce the included angle between the hinge arms 135 and push the side ejector rods 131 outward. This is also the source of the tightening force of the side ejector rods 131 on the inner side wall of the workpiece 10. When the spinning head spins the workpiece 10, due to the acting force of the spinning head, the side ejector rods 131 continuously contract, and the sliding sleeves 136 continuously move towards both ends along the core shaft 134. This is the principle of the expansion and contraction movement of the side ejector rods 131.

[0061] In addition, the push rod 130 also includes: an upper pressure plate 132, which presses the upper edge of the workpiece 10, and the upper pressure plate 132 is linked with the side push rod 131. When the side push rod 131 contracts, the upper pressure plate 132 is set to rise, and when the side push rod 131 expands, the upper pressure plate 132 is set to descend, and a limiting ring 1321 is provided on the lower end face of the upper pressure plate 132 to limit the side push rod 131. The limiting ring 1321 can limit the side push rod 131 so that the side push rod 131 can be smoothly inserted into the workpiece 10.

[0062] Specifically, the upper pressure plate 132 is connected to the sliding sleeve 136 mounted on the upper end of the core shaft 134. When the spinning head spins the workpiece 10, the side push rod 131 is contracted by the extrusion force, and the sliding sleeve 136 mounted on the upper end of the core shaft 134 continues to move upward along the core shaft 134, thereby driving the upper pressure plate 132 originally pressed against the upper edge of the workpiece 10 to lift up, so as to avoid the pressure of the upper pressure plate 132 interfering with the pressure of the spinning head during spinning.

[0063] It is further explained that after the spinning head completes the spinning process on the workpiece 10, it is necessary to reduce the clamping force of the side push rod 131 on the inner wall of the workpiece 10, and at the same time, the upper pressure plate 132 is lowered to continue to press the upper edge of the workpiece 10, thereby ensuring that the workpiece 10 will not be affected by the material's own stress during the cooling and shaping process, resulting in deformation of the original spun size and loss of accuracy. The side push rod 131 synchronously adjusts the side clamping force of the side push rod 131 on the side wall of the workpiece 10 and the lifting height of the upper pressure plate 132 through the adjustment component 133 set at the center position.

[0064] Specifically, the portion where the core shaft 134 and the screw nut 139 cooperate is threaded, and the adjustment assembly 133 includes an adjustment motor 1331 located at the top of the core shaft 134. The adjustment motor 1331 drives the core shaft 134 to rotate, and the screw nut 139 is passed through the upper pressure plate 132 through the guide rod 1332, so that the circumferential freedom of the screw nut 139 is restricted, and then when the adjustment motor 1331 drives the core shaft 134 to rotate, the screw nut 139 can be threadedly engaged with the core shaft 1 34, and during the movement of the screw nut 139, the tensile elastic force of the spring member 138 will be weakened or increased, thereby achieving the adjustment of the side push rod 131 to the inner wall of the workpiece 10. Furthermore, when the screw nut 139 moves downward along the core shaft 134, the spring member 138 will drive the sliding sleeve 136 to move on the core shaft 134, thereby causing the upper pressure plate 132 to move downward, so that the upper pressure plate 132 presses the upper edge of the workpiece 10 again, so that the workpiece 10 regains the clamping force.

[0065] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A hot spinning processing device for an air reducing piston, characterized in that: A proportional valve for controlling the size of the flame is provided on the flame gun (220), and the proportional valve is connected to the temperature sensor (230) via an electrical signal. The flame gun (220) heats the clamped workpiece (10) to soften the side wall of the workpiece (10), and then the workpiece (10) is subjected to a rotary extrusion process by the spinning head (110). During the processing of the spinning head (110), the pressure of the spinning head (110) is detected by a pressure sensor (320) provided in contact with the spinning head (110), and the resistance change of the workpiece (10) applied to the spinning head (110) is fed back in real time, so as to determine the softening degree of the workpiece (10) and the cutting force of the spinning head (110); When the pressure value detected by the pressure sensor (320) deviates from the standard pressure value, the pressure sensor (320) transmits a signal to the processor. After receiving the signal, the processor transmits a control signal to the proportional valve. The proportional valve is adjusted to adjust the flame size of the flame spray gun (220) and the softening degree of the workpiece (10).

2. The hot spinning processing device for an air reduction piston according to claim 1, characterized in that: The spinning heads (110) are symmetrically arranged on both sides of the workpiece (10) in a circumferential direction, and the spinning heads (110) synchronously approach the workpiece (10) to perform spinning processing.

3. The hot spinning processing device for an air reduction piston according to claim 1, characterized in that: When the flame spray gun (220) heats the workpiece (10), the temperature is monitored by a temperature sensor (230) on one side of the flame spray gun (220).

4. The hot spinning processing device for an air reduction piston according to claim 1, characterized in that: The bottom of the workpiece (10) is clamped and fixed by a three-jaw chuck (120), and the three-jaw chuck (120) is arranged to rotate.

5. The hot spinning processing device for an air reduction piston according to claim 1, characterized in that: The top of the workpiece (10) is inserted into the workpiece (10) through a lifting push rod (130) to press the workpiece (10) tightly.

6. The hot spinning processing device for an air reduction piston according to claim 5, characterized in that: The top rod (130) is arranged in an integrated manner.

7. The hot spinning processing device for an air reduction piston according to claim 5, characterized in that: The push rod (130) is arranged in a split manner, and the push rod (130) includes a plurality of side push rods (131) arranged in a circumferential array. The side push rods (131) are arranged to expand and contract, and are arranged to press against the side wall of the workpiece (10).

8. A hot spinning processing device for an air reduction piston according to claim 7, characterized in that, Also includes: An upper pressing plate (132) is provided, wherein the upper pressing plate (132) presses the upper edge of the workpiece (10), and the upper pressing plate (132) is linked with the side push rod (131). When the side push rod (131) contracts, the upper pressing plate (132) is raised, and when the side push rod (131) expands, the upper pressing plate (132) is lowered.

9. The hot spinning processing device for an air reduction piston according to claim 8, characterized in that: The side ejector rod (131) synchronously adjusts the side pressing force of the side ejector rod (131) on the side wall of the workpiece (10) and the lifting height of the upper pressing plate (132) through an adjusting assembly (133) arranged at the central position.

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