JP2005118835A - Warm spinning method, spinning machine, bottomed thin-walled cylindrical body and thin-walled cylindrical body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for warm spinning which can reduce a transformation amount of strain-induced martensite in a formed article made of stainless steel, a spinning machine, a bottomed thin-walled cylindrical body and a thin-walled cylindrical body. <P>SOLUTION: The spinning machine comprises a main shaft stand 2 which has a shaft type forming die 3 to receive a bottomed thin-walled cylindrical workpiece B made of stainless steel to be processed and which rotates the workpiece B through the shaft type forming die 3, an axial pushing stand 4 to hold the received workpiece B in the shaft direction, a roll stand 6 which has roll tools 7 to be used for forming the received workpiece B and moves them reciprocally in the shaft direction, and a temperature control means 12 to control the temperature of the workpiece B under processing between 60-150°C. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a warm spinning method, a spinning machine, and a bottomed thin cylindrical body and a thin cylindrical body manufactured thereby, which are formed into a thin wall from a bottomed thin cylindrical stainless steel workpiece. .

A conventional spinning machine has a form similar to a lathe, has a spindle-shaped mold (mandrel) for setting a workpiece (blank), and rotates a blank via a mandrel, and a blank. A tailstock that is pressed in the axial direction from the bottom side, and a roll base that has a roll tool that performs spatula drawing of the blank and reciprocates in the axial direction are provided. On the other hand, as the blank, a bottomed thin cylindrical cup-shaped material obtained by drawing a stainless steel material on a circular plate is used.
The blank is set on a mandrel and rotated while being pressed by a tailstock, and a roll tool is applied to the blank and moved forward in one direction, whereby the blank is continuously squeezed in the axial direction to obtain a desired A bottomed thin cylindrical body having a wall thickness (plate thickness) is formed. And this spinning process is performed at normal temperature (for example, refer patent document 1).
JP 2001-225134 A

In such a conventional spinning processing method, processing is performed at room temperature without performing temperature control (cold processing), so that the processing heat generated by friction changes in the early and late stages of rotational molding, and the molded product after processing ( There is a problem that the hardness and thickness of the bottomed thin cylindrical body) are not uniform. This is based on the temperature dependence of the processing temperature of stainless steel, and is considered to be due to the fact that the amount of processing-induced martensite transformation increases at room temperature.
Similarly, when processing is performed at room temperature, the amount of deformation-induced martensite transformation of stainless steel increases, and the processing hardness increases remarkably. Therefore, if the thickness is reduced to 1/10 or less, the molded product after processing has a reduced corrosion resistance. There was a problem of causing cracks due to internal strain (decrease in formability).

  An object of the present invention is to provide a warm spinning method, a spinning machine, a bottomed thin cylindrical body, and a thin cylindrical body capable of reducing a processing induced martensite transformation amount of a stainless steel workpiece.

  The warm spinning method of the present invention is characterized by spinning a workpiece made of stainless steel under a temperature control of 60 ° C. to 150 ° C.

  Another warm spinning method according to the present invention is characterized by spinning a workpiece made of stainless steel under a temperature control of 80 ° C. to 100 ° C.

  According to these configurations, by controlling the object to be processed at the time of spinning to a temperature of 60 ° C. to 150 ° C., it is possible to reduce the amount of work-induced martensitic transformation of stainless steel, and suppress an increase in processing hardness. be able to. Thereby, the shaping | molding limit of a workpiece (stainless steel) can be improved. In this case, it is more preferable to manage the workpiece at a temperature of 80 ° C. to 100 ° C.

  In these cases, it is preferable that the workpiece is austenitic stainless steel.

  According to this configuration, austenitic stainless steel has a high temperature dependency on formability and is excellent in formability because of its high ductility, compared to ferritic stainless steel and mild steel. For this reason, it can be processed to be extremely thin while maintaining a predetermined strength.

  In these cases, it is preferable that the object to be processed is a plate-shaped stainless steel material drawn into a bottomed thin cylindrical shape.

  According to this configuration, it is possible to easily obtain a bottomed thin cylindrical object to be processed that is relatively thin and easy to process.

  In this case, it is preferable that the drawing process is performed under temperature control of 60 ° C. to 150 ° C.

  According to this configuration, it is possible to obtain a workpiece having a small hardness and a uniform hardness and thickness. For this reason, a good quality processing object can be obtained easily.

  In these cases, it is preferable to thin the workpiece from 1/10 to 1/20.

  According to this configuration, an extremely thin molded product can be obtained without difficulty. For example, a molded product having a thickness of 0.01 mm is processed from a workpiece having a thickness of 0.5 mm.

  In these cases, the thickness of each part in the longitudinal direction of the workpiece is measured, and based on this measurement result, the pressing pressure against the workpiece of the roll tool used for molding is determined by the thickness of the workpiece after machining. It is preferable to control the pressure so as to be uniform.

  According to this configuration, even if the thickness of the workpiece is not uniform in the longitudinal direction, the molded product can be uniformly molded in the longitudinal direction by controlling the pressure of the roll tool. This is particularly useful when molding extremely thin molded articles.

  The spinning machine of the present invention has a shaft-shaped mold for setting a bottomed thin-walled cylindrical stainless steel workpiece, and rotates a workpiece base through the shaft-shaped mold, and the set workpiece A tailstock that presses the object in the axial direction, a roll base that has a roll tool for forming the set work object and reciprocates in the axial direction, and the work object being processed is changed from 60 ° C to 150 ° C. And a temperature management means for temperature management.

  According to this configuration, the bottomed thin cylindrical workpiece is set in the shaft-shaped mold of the headstock and pressed by the tailstock in the axial direction, and then the workpiece is processed via the shaft-shaped mold. Rotate. At the same time, the roll tool set on the roll base is pressed against the workpiece with a desired pressure and moved forward in the axial direction. Thereby, the workpiece is thinned so as to be squeezed in the axial direction by the roll tool. In this case, the temperature control means can manage the workpiece during spinning from 60 ° C to 150 ° C, so that the amount of stainless steel induced induced martensite transformation can be reduced and the increase in processing hardness is suppressed. can do. For this reason, the shaping | molding limit of a workpiece (stainless steel) can be improved. The “bottom thin cylindrical shape” is a concept including a cylinder having a flange portion at the opening of the cylinder and a step having a stepped portion at the body.

  In this case, the apparatus further includes a lubricant supply unit that supplies a processing lubricant to the rotating workpiece, and the temperature management unit temperature-controls the workpiece via the lubricant by increasing the temperature of the lubricant. Is preferred.

  According to this configuration, since the temperature of the workpiece is controlled via a lubricant (so-called processing oil) dripped onto the workpiece to improve the workability, the lubricant is effective as a heat transfer medium. The structure of the temperature management means can be simplified. The lubricant includes oily and water-based lubricants, but oily ones are more preferable.

  In this case, the temperature management means includes a heater that raises the temperature of the lubricant, a temperature sensor that detects the temperature of the workpiece, and a temperature controller that controls the heater based on the detection result of the temperature sensor. It is preferable.

  According to this configuration, since the temperature of the workpiece is detected and the heater is controlled based on the detection result, temperature management can be performed with high accuracy. In this case, the heater may be provided in a tank that stores the lubricant, or may be provided in a supply pipe that extends from the tank to the workpiece.

  In this case, it is preferable to further include an internal heater incorporated in the shaft-shaped mold and controlled by a temperature controller.

  According to this configuration, the workpiece can be heated (warmed) from the inside via the shaft-shaped mold, and the workpiece can be uniformly heated to a desired temperature.

  Moreover, it is preferable that the temperature management means raises the ambient temperature of the workpiece and controls the temperature of the workpiece.

  According to this configuration, it is possible to uniformly heat the workpiece to a desired temperature.

  In this case, the temperature management means includes an external heater disposed outside the workpiece and / or an internal heater disposed within the shaft-shaped mold, a temperature sensor for detecting the temperature of the workpiece, a temperature sensor It is preferable to have a temperature controller that controls the external heater and / or the internal heater based on the detection result.

  According to this configuration, since the temperature of the workpiece is detected in advance and the external heater and / or the internal heater is controlled based on the detection result, temperature management can be performed with high accuracy. In particular, it is more preferable to use a non-contact heater such as an infrared heater as the external heater.

  In these cases, it is preferable that the temperature sensor is embedded in the axial mold.

  Similarly, it is preferable that the temperature sensor is provided on the roll base and reciprocates together with the roll tool in a state of facing the workpiece.

  According to these configurations, the temperature of the workpiece can be detected with high accuracy.

  In these cases, it is preferable that the temperature management means perform temperature management from 80 ° C. to 100 ° C. instead of 60 ° C. to 150 ° C.

  According to this configuration, spinning can be performed at a temperature of about 90 ° C., which is considered to have the best formability (thickness reduction limit), and a thinner molded product can be obtained.

  In these cases, the measuring means for measuring the thickness of each part in the longitudinal direction of the workpiece, and the pressing pressure of the roll tool against the workpiece on the basis of the measurement result of the measuring means, the thickness of the workpiece after machining is measured. It is preferable to further comprise control means for controlling the pressure so that the thickness is uniform.

  According to this configuration, even if the thickness of the workpiece is not uniform in the longitudinal direction, the molded product can be uniformly molded in the longitudinal direction by controlling the pressure of the roll tool. In addition, it is preferable to comprise a measuring means with the measuring instrument attached to the roll stand with the roll tool, and to provide this sensor in the immediate vicinity of the moving direction of the roll tool.

  And in order to implement | achieve said spinning process easily, it is preferable to further provide the NC control means which can set the thinning process of a workpiece to 1/10 to 1/20 thickness.

  The bottomed thin cylindrical body of the present invention is processed by the above-described warm spinning method.

  Another bottomed thin cylindrical body of the present invention is processed by the spinning machine described above.

  According to these structures, it is possible to stably obtain a molded product (a bottomed thin cylindrical body) that is extremely thin, has excellent corrosion resistance, and does not cause cracks. The “bottomed thin cylindrical shape” in this case is a concept including those having a flange portion at the opening of the cylinder and those having a stepped portion (unevenness) at the body portion. The molded product (bottomed thin cylindrical body) can be applied to a case of a small battery.

  The thin cylindrical body of the present invention is characterized by being configured by cutting both outer ends of each of the above-mentioned bottomed thin cylindrical bodies.

  According to this configuration, an extremely thin cylindrical body can be easily obtained. In addition, this thin cylindrical body is applicable to a heating roll, a pressure roll, or the like of an apparatus related to electrophotographic technology.

  As described above, according to the warm spinning method and spinning machine of the present invention, since the processing temperature is controlled between 60 ° C. and 150 ° C., the amount of transformation induced martensite can be reduced. The moldability and corrosion resistance can be improved, and cracks can be effectively prevented. Further, since the processing temperature is relatively low from 60 ° C. to 150 ° C., the handling property is not impaired.

  In addition, according to the bottomed thin cylindrical body and the thin cylindrical body of the present invention, since the yield can be improved, a highly reliable molded product (product) can be obtained at low cost.

  Hereinafter, a spinning machine and a warm spinning method using the same according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this warm spinning method, a cup-shaped workpiece (blank) previously formed by drawing (deep drawing) is formed into a thinner wall, and this forming is performed at a predetermined temperature. It is what I did. First, the drawing process for obtaining the blank according to the present embodiment will be briefly described.

  As shown in the schematic diagram of FIG. 3, a drawing die (die) 51 for drawing is composed of a female die 52 and a male punch 53, and stainless steel is used as a material for forming. The disc A is used. In this case, an austenitic stainless steel plate such as SUS301, SUS304, SUS304L, or SUS316 is used as the stainless steel. However, it may be a ferritic stainless steel plate or a mild steel plate.

  In this drawing process, the disk A is introduced between the die 52 and the punch 53 to perform the drawing process. Thereby, the cup-shaped blank B with a flange is obtained. Needless to say, the material used for the drawing die (die 52 and punch 53) 51, the surface treatment, and the surface roughness, as well as the lubricant used for this purpose, should be used. Also in this drawing process, it is preferable to control the temperature from 60 ° C. to 150 ° C., as in the spinning process described later. For example, a heater is provided in the die 52, and temperature management is performed by this heater.

  Next, a spinning machine for forming the bottomed thin cylindrical body (molded product) C from the blank B configured as described above will be described. As shown in the schematic diagram of FIG. 1, the spinning machine 1 is an NC controller, and is set against a mandrel 3 having a mandrel (shaft-shaped mold) 3 for setting a blank B, and a mandrel 3. A tailstock 4 having a tailstock 5 for pressing the blank B in the axial direction, a roll base 6 having a roll tool 7 for forming the set blank B and reciprocating it in the axial direction, and these And a control unit 8 that performs NC control of each component device. Further, the spinning machine 1 includes a lubricant supply device 11 that supplies processing oil as a lubricant to the blank B being processed, a temperature management device 12 that controls the temperature of the blank being processed from 60 ° C. to 150 ° C., It has.

  Although not shown in the figure, the headstock 2 has an internal mechanism 21 including a power source such as a motor, a reduction gear train, and the like, and rotates the mandrel 3 at a constant speed. The tailstock 4 has an internal mechanism 22 that holds the tailstock 5 so that the tailstock 5 can move forward and backward. To prevent. The roll base 6 has a pair of roll tools 7, 7 that are opposed to each other with the mandrel 3 interposed therebetween, and a pair of advance / retreat mechanisms 23, 23 that reciprocate each roll tool 7 in the axial direction. The roll tool 7 is subjected to electro-hydraulic servo scanning control by hydraulic actuators 24 and 24 using a template.

  The control unit 8 has a keyboard 26 and a display 27 for inputting NC data, and drives an internal device such as a CPU based on the NC data. The headstock 2, tailstock 4, roll base 6, roll tool 7, etc. Is NC controlled. After the blank B is set on the mandrel 3, when the spinning machine 1 is started, the tailstock 5 of the tailstock 4 moves forward and presses the blank B. Next, the roll base 6 is driven and both roll tools 7 are pressed from the bottom end side of the blank B so as to be squeezed. At this time, the hydraulic actuator 24 controls the pressing amount of the roll tool 7 following the template so that the blank B has a desired shape or thickness. The roll tool 7 is fed in one pass or multiple cycle passes (when the plate thickness reduction ratio is large), whereby a bottomed thin cylindrical body (molded product) C having a desired shape is formed.

  Further, in the case of forming a simple cylinder having a uniform thickness without a step as described above, the final thickness of the molded product C, the plate thickness reduction ratio, etc. are input according to the input screen of the display 27 without using a template. To do. At this time, in this embodiment, pressure control is performed in the control of the electro-hydraulic servo of the roll tool 7. Specifically, the roll base 6 is provided with a measuring instrument (for example, a laser measuring instrument) that measures the thickness (plate thickness) of the blank B in the vicinity of the tip of the roll tool 7 in the feed direction, although omitted in the drawing. The hydraulic actuator 24 is controlled via the driver (control means) of the control unit 8 based on the measurement result of the measuring instrument. That is, the pressing pressure of the roll tool 7 against the blank B is controlled by the hydraulic actuator 24 so that the thickness of the blank B after forming is uniform in the axial direction.

  The lubricant supply device 11 includes a lubricant tank 29 that stores the lubricant, a discharge nozzle 30 that discharges the lubricant to the blank B being processed, and a lubricant tube 31 that connects the lubricant tank 29 and the discharge nozzle 30. And have. An electromagnetic valve 32 is interposed in the lubricant tube 31, and the controller 8 opens the electromagnetic valve 32 in synchronization with the activation of the spinning machine 1 and introduces the lubricant into the blank B. In addition, when the lubricant cannot be supplied from the lubricant tank 29 due to natural flow, a liquid feeding device such as a pump is appropriately provided. Further, the discharge nozzle 30 may be attached to the advancing / retreating mechanism 23 and reciprocated together with the roll tool 7.

  The temperature management means 12 includes a heater 35 incorporated in the lubricant tank 29, a temperature sensor 36 that detects the temperature of the blank B, and a temperature that controls the driving of the heater 35 based on the detection result of the temperature sensor 36. And a controller 37. The heater 35 may be of a type that is built in the lubricant tank 29, but the heater of the embodiment is configured by a plate heater attached to the lower surface of the lubricant tank 29. The temperature sensor 36 is disposed at a position deviated in the circumferential direction with respect to the pair of roller tools (moving trajectories) 7 and 7, and is constituted by a non-contact type (or a contact type). Yes. Then, the temperature controller 37 performs ON / OFF control of the heater 36 so that the temperature detected by the temperature sensor 36 becomes a predetermined temperature (for example, 100 ° C.).

  In addition, as shown in the figure (b), the mandrel 3 may be made into a hollow shape and an internal heater (second heater) 38 may be provided inside the hollow. In this case, it is preferable that the internal heater 38 functions mainly for heating up and uniform heating. Further, the temperature sensor 36 may be incorporated so as to be embedded in the mandrel 3, or may be attached to the advance / retreat mechanism 23 and reciprocate together with the roll tool 7. However, the temperature control in this case may be somewhat rough. In such a case, the temperature sensor 36 is provided in the lubricant tank 29, and the lubricant in the lubricant tank 29 is set to a predetermined temperature (for example, considering heat loss). To 110 ° C.).

  FIG. 2 shows a second embodiment of the temperature management means 12. In this embodiment, the external heater 41 arranged with a gap outside the blank (mandrel 3) B, the temperature sensor 42 similar to the above for detecting the temperature of the blank B, and the detection result of the temperature sensor 42 And a temperature controller 43 similar to the above for controlling the external heater 41 based on the above. Similarly to the temperature sensor 42, the external heater 41 is disposed at a position deviated in the circumferential direction with respect to the pair of roller tools (movement trajectories) 7, 7, and is paired symmetrically in the circumferential direction. Non-contact heaters 41a and 41a. Each non-contact heater 41a is composed of a far-infrared heater having a curved reflector along the blank (mandrel 3) B or the like.

  Each non-contact heater 41a is divided in the axial direction and can be individually controlled, and a plurality of temperature sensors are provided corresponding to the divided heaters so that the blank B is uniformly heated in the axial direction. Thus, the temperature may be controlled. Also in this case, as shown in FIG. 4B, the mandrel 3 can be formed into a hollow shape, and an internal heater 44 can be provided inside the hollow. However, the external heater 41 may be omitted, and temperature management may be performed by the internal heater 44. Further, the temperature sensor 42 may be embedded in the mandrel 3, or may be attached to the advance / retreat mechanism 23 and reciprocate together with the roll tool 7. Furthermore, in these embodiments, it is more preferable to incorporate the temperature controllers 37 and 43 into the control unit 8. That is, the processing temperature (management temperature) is input from the keyboard 26 together with the thickness reduction ratio.

  Next, a test result of blank processing using the spinning machine 1 at a predetermined temperature will be described. FIG. 4 shows the thickness of a SUS304 blank having a thickness of 0.5 mm and 1.0 mm, and the processing temperature is changed to room temperature (conventional), 60 ° C., 80 ° C., 100 ° C., 120 ° C., 150 ° C. The reduction ratio was changed from 1/5 to 1/20, and it was evaluated whether or not “cracking” occurred in the molded product after processing. As shown in the figure, in normal temperature processing, the thickness reduction ratio has a limit of about 1/10. On the other hand, in each warm working at 60 ° C. to 150 ° C., the plate thickness reduction ratio can be worked to about 1/20. From this, it can be confirmed that the limit thickness reduction ratio is increased in warm working (managed at 60 ° C. to 150 ° C.). In addition, it has been found by other tests that the molding limit is most improved around 90 ° C. (80 ° C. to 100 ° C.).

  Similarly, in FIG. 5, a blank is spun to a thickness of 0.5 mm to 0.1 mm, and a plurality of martensite transformation amounts (processing-induced martensite transformation amounts) in the longitudinal direction of the blank (molded product) at that time. It was measured at a point. Also in this case, the processing temperature was measured at normal temperature, 60 ° C, 100 ° C, and 150 ° C. As shown in the figure, in normal temperature processing, the amount of martensite transformation is extremely large and is not constant in the longitudinal direction (axial direction). On the other hand, in each warm working at 60 ° C. to 150 ° C., the amount of martensite transformation is extremely small and is a substantially uniform value in the longitudinal direction. From this, it can be confirmed that in the warm processing (managed at 60 ° C. to 150 ° C.), a molded product having a uniform composition can be obtained with a small amount of martensite transformation.

  Similarly, FIG. 6 shows a case where the blank was spun from 0.5 mm to 0.1 mm in thickness, and the thickness (wall thickness) in the longitudinal direction of the blank (molded product) at that time was measured at a plurality of locations. is there. Also in this case, the processing temperature was measured at normal temperature (measured twice), 100 ° C. and 150 ° C. As shown in the figure, in normal temperature processing, the variation in plate thickness is extremely large in the longitudinal direction. On the other hand, in each warm working, it can be seen that there is almost no variation in the plate thickness in the longitudinal direction, and a constant plate thickness can be obtained. From this, it can be confirmed that there is no variation in the thickness of the molded product in the warm working (managed at 60 ° C. to 150 ° C.).

  As described above, according to the warm spinning method (spinning machine) of the present embodiment, the spinning processing temperature is controlled between 60 ° C. and 150 ° C. (preferably 80 ° C. to 100 ° C.). For this reason, it is possible to obtain a molded product (bottomed thin-walled cylindrical body) C that is capable of maintaining a large thickness reduction ratio and that is compositionally stable. In this warm working, since the martensite transformation amount is small, the occurrence of “cracking” is suppressed and the yield can be improved.

  On the other hand, the bottomed thin cylindrical body C as a molded product manufactured by the spinning machine (warm spinning processing method) 1 of the present embodiment can be commercialized as a battery case in a small electronic device such as a mobile phone. Is possible. Moreover, it can be commercialized as a case for accommodating each cell of the fuel cell. On the other hand, as shown in FIG. 7, the thin cylindrical body D obtained by cutting the bottomed thin cylindrical body C, that is, by cutting the flange portion (opening) Ca and the bottom portion Cb is, for example, an electrophotographic copying apparatus, Commercialization is possible as a heating roll or a pressure roll used in an electrostatic recording apparatus, an electrostatic printing apparatus or the like.

  In addition, although embodiment demonstrated the example which processes a blank and obtains a bottomed thin cylindrical body, this invention is a molded article of the shape which can be shape | molded with the existing spinning machine other than a bottomed cone shape etc. It is also applicable to. Needless to say, the spinning machine of the present invention can be applied to spinning machines other than the NC controller.

  The bottomed thin cylindrical body produced by the present invention is applicable as a case for a small battery or a cell case for a fuel cell. Moreover, a thin cylindrical body is applicable, for example as a heating roll or pressurization roll of electrophotographic technology (a copying machine or a laser printer).

1 is a structural diagram schematically showing a spinning machine according to a first embodiment. It is a structure figure showing typically the spinning machine concerning a 2nd embodiment. FIG. 4 is a structural diagram schematically showing a drawing die for obtaining a blank. It is a figure which shows the test result of the blank process regarding a drawing ratio. It is a figure which shows the test result of the blank process regarding a martensitic transformation amount. It is a figure which shows the test result of the blank process regarding the uniformity of board thickness. It is sectional drawing which shows a bottomed thin cylindrical body and a thin cylindrical body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spinning machine 2 Spindle base 3 Mandrel 4 Tailstock 6 Roll base 7 Roll tool 8 Control part 11 Lubricant supply apparatus 12 Temperature management apparatus 29 Lubricant tank 35 Heating heater 36 Temperature sensor 37 Temperature controller 38 Internal heater 41 External heater 42 Temperature sensor 43 Temperature controller 44 Internal heater A Disk B Blank (object to be processed)
C Thin cylindrical body with bottom (molded product) D Thin cylindrical body

Claims (21)

  A warm spinning method characterized by spinning a stainless steel workpiece under temperature control of 60 ° C to 150 ° C.   A warm spinning method characterized by spinning a stainless steel workpiece under temperature control of 80 to 100 ° C.   The warm spinning method according to claim 1 or 2, wherein the workpiece is austenitic stainless steel.   The warm spinning method according to any one of claims 1 to 3, wherein the object to be processed is obtained by drawing a plate-shaped stainless steel material into a bottomed thin cylindrical shape.   The warm spinning method according to claim 4, wherein the drawing is performed under temperature control of 60 to 150 ° C.   The warm spinning method according to any one of claims 1 to 5, wherein the workpiece is thinned from 1/10 to 1/20.   The thickness of each part in the longitudinal direction of the workpiece is measured, and based on the measurement result, the pressing pressure against the workpiece of the roll tool to be formed is uniform, and the thickness of the workpiece after machining is uniform. The warm spinning method according to any one of claims 1 to 6, wherein the pressure is controlled so that A spindle head that has a shaft-shaped mold for setting a bottomed thin cylindrical stainless steel workpiece and rotates the workpiece through the shaft-shaped mold;
A tailstock for pressing the set workpiece in the axial direction;
A roll base having a roll tool for forming the workpiece to be set and reciprocating the roll tool in the axial direction;
A spinning machine comprising: temperature management means for controlling the temperature of the workpiece to be processed from 60 ° C to 150 ° C. Lubricant supply means for supplying a processing lubricant to the rotating workpiece is further provided,
The spinning machine according to claim 8, wherein the temperature management unit raises the temperature of the lubricant and temperature-controls the object to be processed through the lubricant.   The temperature management means includes a heater that raises the temperature of the lubricant, a temperature sensor that detects the temperature of the workpiece, and a temperature controller that controls the heater based on the detection result of the temperature sensor. The spinning machine according to claim 9, wherein the spinning machine is provided.   The spinning machine according to claim 10, further comprising an internal heater built in the shaft-shaped mold and controlled by the temperature controller.   The spinning machine according to claim 8, wherein the temperature management unit raises an ambient temperature of the processing object to control the temperature of the processing object.   The temperature management means includes an external heater disposed outside the object to be processed and / or an internal heater disposed in the shaft-shaped mold, a temperature sensor for detecting the temperature of the object to be processed, and the temperature The spinning machine according to claim 12, further comprising: a temperature controller that controls the external heater and / or the internal heater based on a detection result of a sensor.   The spinning machine according to claim 10 or 13, wherein the temperature sensor is embedded in the shaft-shaped mold. The temperature sensor is provided on the roll base,
The spinning machine according to claim 10 or 13, wherein the spinning machine reciprocates together with the roll tool in a state of facing the workpiece.   The spinning machine according to any one of claims 8 to 15, wherein the temperature management means performs temperature management from 80 ° C to 100 ° C instead of the 60 ° C to 150 ° C. Measuring means for measuring the thickness of each part in the longitudinal direction of the workpiece;
Control means for controlling pressure of the pressing force of the roll tool against the processing object based on the measurement result of the measuring means so that the thickness of the processing object after processing is uniform. The spinning machine according to any one of claims 8 to 16, wherein the spinning machine is provided.   The spinning machine according to any one of claims 8 to 17, further comprising NC control means capable of setting the thickness of the workpiece to be reduced to 1/10 to 1/20.   A bottomed thin-walled cylindrical body processed by the warm spinning method according to any one of claims 1 to 7.   A bottomed thin-walled cylindrical body processed by the spinning machine according to any one of claims 8 to 18. A thin-walled cylindrical body formed by cutting both outer ends of the bottomed thin-walled cylindrical body according to claim 19 or the bottomed thin-walled cylindrical body according to claim 20.

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