JPH08108221A - Spinning method and device - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a spinning processing method and apparatus capable of obtaining high-quality and stable products without resorting to skill or experience. [Structure] A temperature / thermal image measuring device 3 for detecting heat risen in a work 8 to be processed is provided facing the work 8. The temperature / thermal image signal detected by the temperature / thermal image measuring device 3 is input to the thermal data calculation control device 5. The thermal data arithmetic and control unit 5 calculates the strain amount of the work 8 from the temperature / thermal image signal, compares it with a preset machining upper limit temperature and limit strain of the work 8 and uses the difference as a roll correction signal. Output to the processing control device 2. The machining control device 2 controls the moving table 12 of the spinning machine 1 according to the roll correction signal to change the roll path.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinning method and an apparatus therefor.

[0002]

2. Description of the Related Art Conventionally, for example, a spinning process (note; also known as a spatula drawing) has been performed in order to manufacture a cylindrical or cup-shaped product from a disk-shaped metal workpiece (hereinafter referred to as a work). Has been adopted.

In this spinning method and apparatus, since the shape of the work is formed by plastic deformation by the roll pressed against the work, the trajectory of the roll pressed against the work is important. That is,
If the trajectory of the roll is not appropriate, not only the work cannot be machined into a predetermined shape, but also wrinkles and cracks may occur in the work.

[0004]

However, in the conventional spinning method and apparatus, the locus of the roll is determined by the operator who has many years of experience. Therefore, not only it takes a long time to determine the roll path, but also the fatigue of the operator causes a decrease in reproducibility and there is a possibility that the quality varies.

Therefore, a CNC spinning machine (Note;
Numerically controlled spinning machine controlled by electronic computer)
Although the work of the workpiece is also being processed by the above, the pressing path of the roll set in this CNC spinning machine, that is, the roll path, is also determined by the operator's experience of this CNC spinning machine over the years and the correction made based on the inspection results of the prototype. Has been done.

Therefore, it takes a lot of trial and error until the final roll pass is determined, and it takes time until the condition setting is completed. Still, it is determined whether or not the processing condition is optimum. I can't. Moreover, even if a wasteful process and time are spent, it cannot be evaluated, corrected and shortened.

Therefore, an object of the present invention is to reduce the process and time required to obtain an optimum roll path regardless of the experience of a worker, and perform a spinning process capable of producing a work of constant quality. To obtain a method and its apparatus.

[0008]

According to a first aspect of the present invention, there is provided a spinning working method, wherein the temperature of a workpiece increased by plastic deformation due to a roll pass is detected, and this temperature is compared with a preset upper working temperature limit of the workpiece. Then, the difference is obtained, the roll path is corrected by this difference, and the work is machined.

In the spinning method according to the second aspect of the invention, the temperature of the workpiece increased by the plastic deformation due to the roll path is detected, the plastic strain amount of the workpiece is calculated from this temperature, and the plastic strain amount and the workpiece are calculated. Is compared with the preset limit strain of the workpiece and the machining upper limit temperature, the difference between them is obtained, and the roll path is corrected by this difference to machine the workpiece.

Further, in the spinning processing apparatus of the third aspect of the present invention, the temperature detecting means for detecting the rising temperature of the work plastically deformed by the roll, and the detection signal of the temperature of the work inputted from the temperature detecting means are provided. It is characterized in that it is provided with a temperature calculation means for inputting and comparing with a preset upper processing temperature of the workpiece and calculating, and a roll control means for inputting the calculation result of this temperature calculation means and controlling the trajectory of the roll. .

Further, the spinning machine of the invention described in claim 4 is a temperature / thermal image measuring device for detecting a rising temperature of a work which is plastically deformed by a roll, and this temperature / thermal image measuring device.
The detection signal of the temperature / thermal image of the workpiece input from the thermal image measuring device is input, and the plastic strain amount of the workpiece is obtained from this temperature / thermal image signal and compared with the preset upper processing temperature and limit strain of the workpiece. It is characterized by comprising a thermal data arithmetic and control unit for performing arithmetic operation and a processing control unit for inputting the arithmetic result of the thermal data arithmetic and control unit to correct the locus of the roll and driving the roll.

[0012]

According to the first aspect of the invention, the roll path is corrected in real time by the difference between the machining upper limit temperature set by the material of the work and the temperature of the work increased by the roll path.

Further, in the invention described in claim 2,
The roll pass is corrected in real time by the difference between the upper limit processing temperature and the limit strain set by the material of the work and the temperature of the work increased by the roll pass and the strain amount calculated from this temperature.

Further, in the invention described in claim 3,
The locus of the roll is controlled in real time by the roll control means to which the calculation result of the temperature calculation means for comparing and calculating the machining upper limit temperature of the work set to the temperature calculation means is inputted.

Further, in the invention according to claim 4, a temperature and a temperature for detecting a preset upper limit temperature and limit strain of the workpiece and a rising temperature of the workpiece during machining are set.
The temperature of the work input from the thermal image measuring device and the strain amount of the work obtained from the thermal image signal are compared by the thermal data calculation control device. Controlled by.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the spinning method and apparatus of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a spinning method and an apparatus therefor according to the present invention, showing a case where a cylindrical product is processed from a disk-shaped material.

In FIG. 1, on the upper surface of the spinning machine 1, there is a moving table 12 driven in the directions of arrow X and arrow Y.
Is provided. The moving table 12 includes an X-axis 12a for driving a molding roll 9 and a heating / cooling device 11 which will be described later in an arrow X direction by an X-axis drive motor (not shown), and an X-axis 12a which drives the X-axis 12a by a Y-axis drive motor (not shown). It is composed of a pair of Y-axes 12b that are driven to the right.

Of these, the heating / cooling device 11 attached to the right end of the X-axis 12a houses an air pressure part and a heater inside. Of these, the output side of the pneumatic unit is the heating and cooling device.
It is connected to a nozzle 11a protruding from the front end of 11, and the output side of the heater is connected to a nozzle 11b adjacent to the nozzle 11a.

A roll mounting base 9 is fixed to the X-axis 12a on the left side of the heating / cooling device 11, and a substantially disc-shaped roll is provided at the tip of an L-shaped arm protruding from the front end of the roll mounting base 9. 9a is attached to the arm via a bearing (not shown) at the tip of the roll 9a.

On the other hand, a mandrel 6 is provided in the front part of the spinning machine 1 in parallel with the X axis 12a. A motor (not shown) is connected to the left end of the mandrel 6,
The left side of the mandrel 6 is supported by a pair of bearings (not shown).

On the right end surface of the mandrel 6, a circular disk-shaped work shown by a broken line is drawn into a truncated cone shape as shown by a dashed line, and then a left end is formed as a trumpet shape as shown by a solid line. , Workpiece 8 that is further drawn into a cylindrical shape
Material is attached. The work 8 is pressed from the right side of the work 8 by a presser 7 provided on the same axis as the mandrel 6 on the right side of the work 8.

A cylindrical protrusion (not shown) is formed on the left side surface of the pressing plate 7 at the center of the axis, and the protrusion is inserted into a positioning hole (not shown) formed in the center of the work 8. A presser bar 7a is provided on the right side of the presser bar 7 on the same axis as the presser bar 7, and a pair of bearings (not shown) supporting the right side of the presser bar 7a is inserted into the right side of the presser bar 7a. An electric motor (not shown) is connected to the right end of the rod 7a via a coupling (not shown).

Further, on the right side of the spinning machine 1,
A processing control device 2 including an NC control device is installed. The other end of the signal line connected to one side of the machining control device 2 is connected to the X-axis drive motor, the Y-axis drive motor and the heating / cooling device 11, the mandrel drive motor and the presser bar drive motor of the spinning machine 1 described above, respectively. It is connected.

Further, one side of a thermal data calculation control device 5 described later is connected to the other side of the processing control device 2. To the other side of the thermal data calculation control device 5, a temperature / thermal image measuring device 3 which will be described later and is installed facing the work 8. This temperature / thermal image measuring device has a work 8
The camera has a built-in charge-coupled device that receives infrared rays emitted from the camera and outputs a temperature / thermal image signal proportional to the intensity of the received infrared rays.

On the other side of the thermal data arithmetic and control unit 5,
It is connected to a temperature / thermal image display device 4 which will be described later and displays the detected temperature of the work 8 input from the thermal data arithmetic and control unit on the screen 4a.

In the spinning machine having the above-mentioned structure, the X-machine is operated in accordance with the machining program previously inputted to the machining controller 2 by the operator as in the conventional case.
The shaft drive shaft 12a, the Y-axis drive shaft 12b, the mandrel drive electric motor, and the presser bar drive electric machine are driven.

By the roll 9a which moves in the X and Y axis directions according to this machining program, the disk-shaped work 8 shown by the broken line is drawn to the left side as shown by the arrow to form a circular discoidal shape shown by the one-dot chain line. Then, it becomes a trumpet shape as shown by the solid line, and is further molded into a cylindrical product shown by the broken line.

In this forming process, the work 8 is heated by the roller 9a in proportion to the plastic strain due to the shear deformation. This heat is input to the thermal data calculation control device 5 as the thermal image data 22 shown in FIG. 2 by the temperature / thermal image measuring device 3.

The thermal data arithmetic and control unit 5 compares the temperature scale 23 shown in FIG. 2 with the above-mentioned thermal image data 22 to obtain the temperature of each part of the work 8 for each roll pass, and also uses the equation (1). , The amount of plastic strain of each part of the work is obtained for each roll pass from the temperature rise value of each part.

[0030]

[Equation 1]

The temperature rise value of each part of the work obtained by the thermal data arithmetic and control unit 5 is the temperature / thermal image display unit 4.
2 is displayed and the thermal image shown in FIG. 2 is displayed, and the determination criteria of the 1-pass limit strain ε and the material processing upper limit temperature t shown in the graph of FIG. The temperature of each part of the work described above is compared with the amount of plastic strain, and the result is output to the processing control device 2 as a control signal.

Then, in the machining control device 2, based on the control signal input from the thermal data arithmetic and control device 5, FIG.
The X and Y axes are controlled to drive the roll 9a and the heating / cooling device 11 is turned on / off so as not to exceed the material processing upper limit temperature t and the 1-pass limit strain ε shown in FIG.

In the spinning machine configured as described above, the above-mentioned machining is repeated several times to produce several products, and the temperature rise value of each part and the 1-pass limit strain do not exceed the values shown in FIG. After confirming the above, the product is cut, and the thickness of the plastically deformed portion is inspected. Then, the corrected final roll pass data is stored in the machining control device 2.

When the workpiece is machined by the stored machining data, the operator confirms the image displayed on the temperature / thermal image display device 4, and if the material machining upper limit temperature shown in FIG. 3 is exceeded. If so, stop the processing and correct the data again.

FIG. 4 is a block diagram showing the control flow of the above-described spinning processing apparatus. When the spinning processing machine 1 is driven in step S1, the thermal image data 22 of the work 8 is converted into a thermal image in step S2. It is measured by the measuring device 3. The thermal image data 22 of the workpiece 8 detected by the thermal image measuring device 3 is input to the thermal data arithmetic control device 5, and in step S3, the temperature rise and plasticity of each part of the workpiece 8 are calculated from the input thermal image data 22. The amount of strain is calculated.

In the next step 4, the temperature rise value and the amount of strain of each part of the work 8 obtained in step 3 are compared with the material processing upper limit temperature and the 1-pass limit strain which are preset in the thermal data calculation control device 5. The values are compared to determine the excess or deficiency, and the result is output to the machining control device 2 as the control condition shown in step 5.

In this way, the machining condition of the work 8 is captured as real-time data, the machining conditions of the work 8 are controlled, and the work 8 is machined by the machining control device 2, whereby the optimum roller path can be obtained. It is possible to carry out spinning processing to obtain a product of constant quality.

[0038]

As described above, according to the invention of claim 1,
By detecting the temperature of the workpiece that has increased due to plastic deformation due to the roll path, comparing this temperature with the preset machining upper limit temperature of the workpiece to find the difference, and correcting the roll path with this difference to machine the workpiece Since the machining state of the machine was detected from the temperature of the work in real time data and the roll path was corrected, the process and time required for machining can be shortened regardless of the experience of the operator, and the work of constant quality can be manufactured. It is possible to obtain a possible spinning method.

According to the second aspect of the invention, the temperature of the workpiece increased by the plastic deformation due to the roll path is detected, the plastic strain amount of the workpiece is calculated from this temperature, and the plastic strain amount and the temperature of the workpiece are calculated. Is compared with the preset limit strain of the workpiece and the upper processing temperature limit to find the difference, and the roll path is corrected by this difference to process the workpiece. Since the amount of strain was calculated and the roll path was corrected, it is possible to obtain a spinning processing method that can shorten the process and time required for processing regardless of whether the operator has experience or not and can produce a work of constant quality. it can.

According to the third aspect of the present invention, the temperature detecting means for detecting the rising temperature of the work plastically deformed by the roll and the detection signal of the temperature of the work inputted from the temperature detecting means are inputted. By providing a temperature calculation means for comparing and calculating with a preset machining upper limit temperature of the work and a roll control means for inputting the calculation result of the temperature calculation means and controlling the locus of the roll, the machining state of the work can be determined. Compared with the temperature of the workpiece detected in real time and the preset machining upper limit temperature, the trajectory of the roll is controlled based on the calculation result, so the process and time required for machining can be shortened regardless of the experience of the operator. However, it is possible to obtain a spinning processing device capable of producing a work of constant quality.

Further, according to the invention of claim 4,
A temperature / thermal image measuring device that detects the rising temperature of the work that is plastically deformed by the roll, and a detection signal of the temperature / thermal image of the work input from this temperature / thermal image measuring device are input. From the thermal data calculation control device that calculates the plastic strain amount of the workpiece from the preset machining upper limit temperature and the limit strain of the workpiece, which is calculated in advance,
By providing a processing control device that inputs the calculation result of this thermal data calculation control device and corrects the trajectory of the roll and drives the roll, the plastic strain of the work is obtained from the temperature of the work in which the working state of the work is detected in real time, This plastic strain amount and the detected temperature of the work are compared and calculated with the preset limit strain and the machining upper limit temperature, and the trajectory of the roll is corrected and controlled by this calculation result, regardless of the experience of the operator. Thus, it is possible to obtain a spinning processing apparatus capable of producing a work of constant quality by reducing the process and time required for processing.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a spinning method and an apparatus therefor according to the present invention.

FIG. 2 is a diagram showing the operation of the spinning method and apparatus of the present invention.

FIG. 3 is a graph showing an example of material processing upper limit temperature and critical strain set in the spinning processing method and apparatus of the present invention.

FIG. 4 is a block diagram showing the operation of the spinning method and apparatus of the present invention.

[Explanation of symbols]

1 ... Spinning processing machine, 2 ... Processing control device, 3 ... Temperature
Thermal image measuring device, 4 ... Temperature / thermal image display device, 5 ... Thermal data calculation control device, 6 ... Mandrel, 7 ... Presser foot, 7a ...
Presser bar, 8 ... Work, 9 ... Roll mounting base, 9a ... Roll, 11 ... Heating / cooling device, 11a, 11b ... Nozzle, 12 ... Moving table, 12a ... X axis, 12b ... Y axis, 22 ... Thermal image data, 23… Temperature scale.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kimio Osawa No. 1 Toshiba-cho, Fuchu-shi, Tokyo Toshiba Corporation Fuchu factory

Claims (4)

[Claims] 1. A temperature of a workpiece increased by plastic deformation due to a roll pass is detected, and a difference between the temperature and a preset upper working temperature of the workpiece is calculated to obtain a difference between the temperatures. The roll pass is corrected by the difference. Spinning processing method for processing workpieces. 2. A temperature of a workpiece increased by plastic deformation by a roll path is detected, a plastic strain amount of the workpiece is calculated from the temperature, and the plastic strain amount and the temperature of the workpiece are set to a preset limit of the workpiece. A spinning working method in which the difference between the strain and the working upper limit temperature is obtained, and the roll path is corrected by this difference to work the work. 3. A temperature detecting means for detecting a rising temperature of a work plastically deformed by a roll, and a detection signal of the temperature of the work inputted from the temperature detecting means,
A spinning processing apparatus comprising: a temperature calculation means for comparing with a preset machining upper limit temperature of the workpiece for calculation; and a roll control means for inputting a calculation result of the temperature calculation means and controlling the locus of the roll. 4. A temperature / thermal image measuring device for detecting a rising temperature of a work plastically deformed by a roll, and this temperature / thermal image measuring device.
The detection signal of the temperature / thermal image of the work inputted from the thermal image measuring device is inputted, and the machining upper limit temperature and the limit strain of the work set in advance to obtain the plastic strain amount of the work from the temperature / thermal image signal A spinning processing apparatus comprising: a thermal data arithmetic and control unit which compares and operates with a thermal data arithmetic and control unit;