JP2005186142A - Spinning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spinning device capable of detecting the magnitude of a load on a drive motor for drawing and a drive motor for feeding, controlling the spinning condition based on the detected values, and performing the stable spinning in a short time while suppressing generation of defective products. <P>SOLUTION: The spinning device to draw a tubular material 5 by the rotation comprises a drive motor 51 for feeding to change the drawing position, a drive motor 14 for drawing to change the drawing amount, a feed torque detection means 51a to detect the load torque of the drive motor for feeding, a drawing torque detection means 14a to detect the load torque of the drive motor for drawing, and a control means 3 to control the spinning condition. The control means controls the spinning condition based on the detected values of the feed torque detection means and the drawing torque detection means. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a spinning processing apparatus that performs drawing processing of a tube material by rotation, and is capable of controlling molding conditions to shorten the molding time.

In general, a processing apparatus for forming a tube material by rotation, such as spinning processing or flow forming processing, includes a driving motor for drawing to change the amount of drawing, a forming roller for performing drawing processing, and a workpiece. A plurality of drive motors are provided, such as a feed drive motor for moving the tube material to change the throttle position.
The molding conditions of the workpiece, such as the molding rotation speed and the drawing amount of the molding roller and the pipe material, are determined by the driving rotation speeds of these drive motors. These molding conditions are preset in the machining apparatus as NC programs. Has been.
The molding conditions set in the processing equipment are often set to constant conditions from the start of molding to the end of molding, but the size of the load applied to each drive motor during molding changes with time, so molding The conditions are not always constant, but are preferably controlled according to the magnitude of the load and the molding process.

  Therefore, the processing apparatus disclosed in Patent Document 1 is configured to perform molding while changing the control state during the molding process. In other words, the control of the pressing operation of the clamp shaft for clamping the pipe material is performed by position control at the time of drawing, and different control is performed depending on the forming process, such as by force control at the time of ironing.

JP 2002-282949 A

When the above-described processing apparatus is a spinning processing apparatus, the magnitude of the load applied to the drawing drive motor and the feed drive motor affects the quality of the workpiece and the molding time.
That is, when an excessive load is applied to the aperture drive motor and the feed drive motor, there arises a problem that a defect occurs in the workpiece or the life of the machining apparatus is reduced. Conversely, if one or both of the aperture drive motor and the feed drive motor is in a state where an excessive load is applied, the molding efficiency is lowered and the molding time is prolonged.
In addition, when molding is performed with the molding roller driving condition, which is the molding condition of the tube material, being constant, the load torque applied to the diaphragm driving motor and the feed driving motor changes with time.
However, in the processing apparatus shown in Patent Document 1 described above, only the control of the pressurization operation by the hydraulic cylinder of the clamp shaft is changed according to the molding process, but the driving conditions of the molding roller constituting the molding conditions of the tube material Since there is no change in the process of molding, there is a case where a defect occurs in the work piece or the molding time becomes long.

  Therefore, in the present invention, the magnitude of the load applied to the aperture drive motor and the feed drive motor is detected, and the molding conditions are controlled based on the detected values, and the generation of defective products is suppressed in a short time. A spinning processing apparatus capable of performing stable molding is provided.

A spinning processing apparatus that solves the above problems has the following characteristics.
That is, a spinning processing apparatus that performs tube drawing processing by rotation as in claim 1, a feed drive motor for changing the drawing position, and a drawing drive motor for changing the drawing amount; A feed torque detecting means for detecting the load torque of the feed drive motor; a throttle torque detecting means for detecting the load torque of the drive motor for the throttle; and a control means for controlling the molding conditions. Controls the molding conditions based on the detection values of the feed torque detecting means and the throttle torque detecting means.
This prevents the generation of defective products due to excessive load torque, the reduction of equipment life, and the lengthening of molding time due to excessive load torque, enabling stable and highly accurate molding and shortening the molding time. Thus, the production efficiency can be improved.

According to a second aspect of the present invention, when the detected values of the feeding torque detecting means and the throttle torque detecting means are excessive with respect to the set values, the control means is a drive motor whose detected value is excessive. At least one molding condition of the molding rotational speed, feed speed, and throttle amount is reduced so that the detected torque of the feed torque detecting means and the throttle torque detecting means becomes the set value. On the other hand, if it is too small, at least one molding condition of the molding rotational speed, the feed speed, and the amount of drawing is increased so that the load torque of the drive motor whose detection value is too small becomes the set value.
As a result, the control is easy and the reaction can be performed quickly, and a highly accurate control can be performed.

According to the present invention, generation of defective products due to excessive load torque, reduction in equipment life, and prolonged molding time due to excessive load torque can be prevented, and stable and highly accurate molding can be performed. It is possible to shorten the time and improve the production efficiency.
In addition, the control is easy and the reaction can be performed quickly, so that highly accurate control can be performed.

Next, modes for carrying out the present invention will be described with reference to the accompanying drawings.
First, the configuration of the spinning processing apparatus will be described.
As shown in FIG. 1 to FIG. 3, the spinning processing apparatus has a function of rotating a molding roller 19 for performing a molding process, a function of narrowing down a tube material 5 as a workpiece by the molding roller 19, and a molding roller 19. A shaft head 1 having a function of feeding (moving) a pipe, a jig part 2 for fixing and moving the pipe member 5, and a control part 3 for controlling the shaft head 1 and the jig part 2. It is comprised by.

In the shaft head 1, the shaft head 12 is rotatably supported by the shaft head body 11, and a pair of forming rollers 19 and 19 are provided on the roller support 17 of the shaft head 12 via the arms 18 and 18. It is supported.
Further, the shaft head body 11 is provided with a rotation drive motor 13 and a diaphragm drive motor 14.

  A drive gear 16 a is fixed to the rotation drive motor 13, and a driven gear 16 b is fixed to the shaft head 12. The drive gear 16a and the driven gear 16b mesh with each other, and the shaft head 12 is rotationally driven by driving the rotation drive motor 13. When the shaft head 12 is rotationally driven, the forming rollers 19 and 19 supported by the roller support 17 are also rotationally driven integrally with the shaft head 12. In this case, the forming rollers 19 and 19 revolve around the axis of the roller support 17 serving as a rotation shaft.

An aperture driving motor 14 is connected to the roller support 17 via a draw bar 15. When the aperture driving motor 14 is driven to rotate, the roller support 17 is driven for aperture by the draw bar 15 serving as an aperture shaft. It moves to the axial direction (left-right direction in FIG. 1) of the motor 14, and the arm 18 * 18 rotates centering on the fulcrum 18a * 18a.
The forming rollers 19 and 19 move in a direction toward or away from each other by the rotation of the arms 18 and 18. That is, the pair of forming rollers 19 and 19 move in the vertical direction in FIGS. 1 and 2, and the movement directions are opposite to each other. The dimension between the forming rollers 19 and 19 is changed by the amount of movement of the forming rollers 19 and 19, and the amount of drawing of the tube material 5 is adjusted.

  Further, a feed drive motor 51 is provided on the shaft head 1 side, and by rotating the feed motor 51, the shaft head body 11 moves in the direction of the feed shaft 51b (left and right direction in FIG. 1). Is configured to move. Thereby, the position of the axial direction of the forming rollers 19 and 19 with respect to the pipe material 5 can be adjusted.

On the other hand, the jig part 2 is configured by installing a jig main body 21 on a pedestal 24 via a turntable 25, and the jig main body 21 is used for gripping and fixing a pipe material 5 as a workpiece. A pair of upper and lower clamps 23a and 23b are provided.
The upper clamp 23a can be moved up and down by a clamp cylinder 22. By moving up and down, the tube material 5 is switched between a clamped state and a clamp-released state.
In addition, as the pipe material 5, for example, a stainless blank material is formed into a cylindrical shape by roll forming, and then the end surfaces are joined to form a tubular shape.

  The jig portion 2 is movable along the rails 26 and 26 laid on the floor surface in a direction perpendicular to the moving direction of the axial head body 11 (the depth direction of the paper surface in FIG. 1), and a turntable. The jig main body 21 installed on 25 is rotatable around the vertical axis O.

The control unit 3 includes an NC controller 31 and a motor driver 32, and the rotation drive motor 13, the aperture drive motor 14, and the feed drive motor 51 are connected to the motor driver 32.
Further, the diaphragm drive motor 14 and the feed drive motor 51 are respectively provided with a diaphragm torque detecting means 14a and a feed torque detecting means 51a, and the diaphragm torque detecting means 14a and the feed torque detecting means 51a. Is connected to the NC controller 31. Further, the jig unit 2 is also connected to the NC controller 31.

Predetermined molding conditions are input as NC programs in advance to the NC controller 31, and the spinning processing apparatus performs drawing of the tube material 5 according to the molding conditions.
The molding conditions include the rotational speed of the shaft head 12 that is rotationally driven by the rotational drive motor 13 (the rotational speed of the molding rollers 19 and 19: hereinafter referred to as “the rotational speed of molding”), and the movement by the feed drive motor 51. The moving speed of the shaft head 1 (moving speed of the forming rollers 19 and 19: hereinafter referred to as “feeding speed”) and the amount of movement of the forming rollers 19 and 19 by the driving motor 14 for drawing (of the forming rollers 19 and 19) Aperture amount: hereinafter referred to simply as “aperture amount”) is set.

Based on these molding conditions, a drive command for each drive motor 13, 14, 51 is output from the NC controller 31 to the motor driver 32, and the motor driver 32 drives each drive motor 13, 14, 51 in accordance with this drive command. To do.
Further, the jig portion 2 also moves along the rails 26 and 26 and rotates around the vertical axis O based on the control of the NC controller 31.

Further, during the drawing process, load torques applied to the drawing drive motor 14 and the feeding drive motor 51 are detected by the drawing torque detecting means 14a and the feeding torque detecting means 51a, respectively, and input to the NC controller 31. It is configured to be.
The NC controller 31 performs control by feeding back the detection values of the detection means 14a and 51a to the set molding conditions.

FIG. 4 shows a catalytic converter 61 which is an example of a molded product molded by the spinning processing apparatus configured as described above.
The catalytic converter 61 is configured by inserting a carrier whose outer circumference is covered with a mat into a pipe 62 having an outer dimension d1, and drawing both ends 62a and 62a of the pipe 62 to an outer dimension d2. Is.

When the catalytic converter 61 is formed, the tube material 62 is held by the clamps 23 a and 23 b of the jig portion 2, the shaft head 12 is rotated by the rotation drive motor 13, and the forming roller 19 is formed by the feed drive motor 51. 19 is moved in the axial direction of the pipe material 62 and drawing is performed while the dimension between the forming rollers 19 and 19 is changed by the drawing drive motor 14.
That is, when the forming rollers 19 and 19 are located at the center of the tube material 62, the dimension between the forming rollers 19 and 19 is controlled to be d1, and the forming rollers 19 and 19 move to the end portion 62a of the tube material 62. As a result, the size between the forming rollers 19 and 19 is finally narrowed to the size d2, and drawing is performed.

  In the catalytic converter 61 shown in FIG. 4, the axial center of the end portion 62a subjected to the drawing and the axial center of the central portion of the tube material 62 coincide with each other. In the converter 71, like the one end portion 72a of the pipe material 72, the shaft center of the end portion 72a is eccentric with respect to the central axis of the tube material 72, or the drawing of the other end portion 72b is performed. As described above, it is possible to perform drawing by decentering the axis of the end 72b with respect to the axis of the center of the pipe member 72.

In other words, the jig portion 2 of the present spinning device can move in the direction perpendicular to the moving direction of the axial head body 11 along the rails 26 and 26 laid on the floor surface. When the drawing process is performed with the dimension between 19 narrowed, the jig part 2 is moved so that the revolution center of the forming rollers 19 and 19 and the axis of the pipe material 72 are eccentric, so that the end 72a Thus, the eccentric drawing can be performed (the axial center of the central portion of the tube material 72 and the axial center of the end portion 72a are eccentric by the dimension e).
Further, since the jig body 21 is rotatable about the vertical axis O, the jig body 21 is rotated so that the revolution center of the forming rollers 19 and 19 and the axis of the tube material 72 are deviated. Thus, it is possible to perform drawing with a declination as in the end portion 72b (the axis of the end portion 72b is deviated with respect to the central axis of the tube material 72 to form an angle θ).

The spinning processing apparatus performs control by feeding back the detection values of the drawing torque detecting means 14a and the sending torque detecting means 51a to the NC controller 31 during the molding process. Next, regarding the flow of the feedback control, This will be described with reference to FIG.
First, it is determined by the NC controller 31 whether or not the spinning processing apparatus is performing molding (S01). The determination as to whether or not the spinning apparatus is in the molding process is made based on, for example, whether one of the drive motors 13, 14, 51 is driven.

  When it is determined that the spinning apparatus is in the process of forming, the load torque applied to the throttle drive motor 14 and the feed drive motor 51 is respectively determined by the throttle torque detector 14a and the feed torque detector 51a. It is detected (S02), and it is determined whether or not the detected magnitude of the load torque of each of the drive motors 14 and 51 is equal to or greater than a preset value (S03).

If it is determined that the load torque is equal to or greater than the set value, the molding rotation speed, the feed speed, and the amount of squeezing are reduced so that the load torque of the drive motor determined to be equal to or greater than the set value becomes the set value. The drive motors 13, 14, 51 are controlled (S04).
Conversely, if it is determined that the load torque is smaller than the set value, the molding rotational speed, feed speed, and throttle amount are set so that the load torque of the drive motor determined to be smaller than the set value becomes the set value. The drive motors 13, 14, and 51 are controlled in the increasing direction (S05).
As a result, the load torques of the aperture drive motor 14 and the feed drive motor 51 are held at a constant value.
In addition, when decreasing or increasing the molding rotational speed, the feeding speed, and the amount of drawing, it is preferable to gradually decrease or increase rather than rapidly decreasing or increasing.

FIG. 7 shows the difference in change over time in the load torque of the diaphragm drive motor 14 and the feed drive motor 51 when the feedback control based on the detected load torque is performed and when it is not performed.
According to FIG. 7, when feedback control is not performed, the load torques of the aperture drive motor 14 and the feed drive motor 51 change considerably with time, but are detected as in the present invention. When the control is performed by feeding back the load torques of the aperture drive motor 14 and the feed drive motor 51 to preset molding conditions, the load torques of the aperture drive motor 14 and the feed drive motor 51 are both It is controlled to a constant value.

  As described above, the load torque of the drive motors 14 and 51 of each motor is fed back to the NC controller 31 so that the load torque is kept constant and controlled to the optimum molding conditions, thereby generating defective products due to excessive load torque. It is possible to reduce the equipment life and increase the molding time due to the excessive load torque, and stably perform high-precision molding, and shorten the molding time and improve the production efficiency. Become.

Further, the NC controller 31 that has received the detected load torque of the drive motors 14 and 51 sets the molding conditions such as the molding rotational speed, the feed speed, and the drawing amount of the spinning processing device in order to keep the load torque constant. Although these are reduced or increased, these molding conditions can be adjusted by controlling the number of rotations of the drive motors 13, 14, 51, so that control is easy and reaction can be made quickly. It becomes possible to perform highly accurate control.
It should be noted that the adjustment of the molding conditions such as the molding rotational speed, the feed speed, and the amount of drawing does not always have to be increased / decreased, and it is sufficient to adjust at least one of the molding conditions as necessary.

It is a side view which shows the spinning processing apparatus of this invention. It is a front view which shows the axial head part of a spinning processing apparatus. It is a perspective view which shows the jig | tool part of a spinning processing apparatus. A side view of a catalytic converter formed by a spinning processing apparatus, wherein a central axis that has not been drawn and a central axis that has been drawn are concentrically arranged. It is sectional drawing. A catalytic converter formed by a spinning processing apparatus, wherein a central axis that is not drawn and an axial center of an end that is drawn are eccentric and deviated. It is side surface sectional drawing shown. It is a figure which shows the flow at the time of performing feedback control based on the detected load torque of the drive motor in a spinning processing apparatus. It is a figure which shows the difference of the load torque when not performing feedback control and the load torque when not performing feedback control in the drive motor for a feed, and the drive motor for aperture_diaphragm | restriction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shaft head 2 Jig part 3 Control part 5 Tube 13 Rotation drive motor 14 Diaphragm drive motor 14a Diaphragm torque detection means 19 Forming roller 23a / 23b Clamp 51 Feed drive motor 51a Feed torque detection means

Claims (2)

A spinning processing device that performs drawing processing of a tube material by rotation,
A drive motor for feeding to change the aperture position, and a drive motor for aperture to change the aperture amount;
A feed torque detecting means for detecting the load torque of the feed drive motor, and a throttle torque detecting means for detecting the load torque of the throttle drive motor;
Control means for controlling the molding conditions,
The spinning device according to claim 1, wherein the control unit controls molding conditions based on detection values of the feeding torque detecting unit and the drawing torque detecting unit. When the detected values of the feed torque detecting means and the throttle torque detecting means are excessive with respect to the set value, the control means is configured so that the load torque of the drive motor whose detected value is excessive becomes the set value. And reducing at least one molding condition of molding rotational speed, feed speed, and drawing amount,
When the detection values of the feed torque detection means and the throttle torque detection means are too small with respect to the set value, the molding rotational speed is set so that the load torque of the drive motor whose detection value is too small becomes the set value. The spinning processing apparatus according to claim 1, wherein at least one molding condition of a feed rate and a drawing amount is increased.

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