JPS62252629A - Drawing method in spinning machine - Google Patents

Abstract

PURPOSE:To permit exact with a simple operation by controlling the movements of respective drawing rolls so as to follow the movement of a master drawing roll by the position signals for the respective drawing rolls and the position signal for the master drawing roll based on the position signal for the master drawing roll. CONSTITUTION:A work W is mounted to a revolving main spindle 2 and is moved in the axial center direction of the main spindle by a carriage 3. The drawing rolls 4, 5, 6, therefore, move forward and backward respectively in X1, X2, X3 directions toward the axial center direction of the main spindle. The reference position signal of the master drawing roll 4 corresponding to the position thereof from a position detector 15 and the position signals provided to the drawing rolls 5, 6 are compared and the drawing rolls 5, 6 are moved forward and backward in the directions X2, X3. The relative positional relations of the respective drawing rolls are thereby set and the working accuracy is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a drawing method in a spinning machine, in which a plurality of drawing rolls are arranged substantially symmetrically on a workpiece to draw the workpiece.

Conventional technology In the above-mentioned drawing process using a plurality of drawing rolls, a method is adopted in which each drawing roll is mechanically set in a predetermined position using a screw or the like, and the drawing process is performed by moving along the processing axis of the drawing rolls. It is being Another method is to arrange a copying template on each aperture a-le and perform copying processing.

Problems to be Solved by the Invention When fixing the mechanically fixed semi-submerged drawing roll, it is difficult to change the set position. Therefore, a method is adopted in which rough machining is performed using another processing machine and finishing machining is performed using a spinning machine, which poses problems such as the need for labor and labor for the auctioning and machining.

In addition, in the latter method using copying templates, it is necessary to fit each copying template in a predetermined relative position, but there are problems such as requiring a large amount of time to arrange the templates.

In view of this, the present invention uses 1.7 squeeze rolls as a standard, and automatically regulates the squeezing amount by setting the other squeeze rolls to the standard squeeze roll ≦ζ, thereby simplifying the operation and achieving accurate deformation processing. The purpose is to

Means for Solving the Problems The present invention for achieving the above objects will be described with reference to the drawings. The spinning machine 1 has a plurality of, for example, three squeeze rolls (1, j, A) arranged approximately symmetrically with respect to the rotating workpiece W.

In the method of the present invention, the squeezing rolls 41, j, and tE are position detectors /j, /d in the squeezing direction, respectively.

/7, select seven suitable squeeze rolls, for example a, as a master squeeze roll, and use the position signal from the position detector of this master squeeze roll 4 as a reference, and use the other squeeze rolls j and t as their respective rolls. The gist of the invention is to control the movement of each squeeze roll in conjunction with the master squeeze roll using a position signal from a position detector for the master squeeze roll and a position signal from a position detector for the master squeeze roll.

By simply controlling the movement of the working master squeezing roll in the squeezing direction, the other squeezing rolls automatically follow suit.

Example @ / [ is an explanatory diagram of the principle of the present invention, etc. The following shows a spinning machine for carrying out the present invention,
In each example, there are three squeeze rolls. The spinning machine is equipped with a rotating main shaft on which a workpiece W is attached, and a carriage J that reciprocates in the direction of the main shaft. Each squeeze roll It1. ! , 4 are cylinders ry for forward and backward movement, 1. The squeeze rolls 11. j and t are front and back in the X/, X-co, and XJ force directions, respectively, facing the center of the main shaft 6.

Position detectors /Jr, /l, /7 are attached to each of the connecting rods lθ, //, /, respectively, to electrically detect the position of the roll. For example, a potentiometer or the like is used as this position detector.

Servopulp /l, /de, Jθ is installed in each cylinder, r, 9 as shown in Figure 1 Cζ. Control the supply of pressure oil to move the squeeze rolls/l, J, and t back and forth.

In the present invention, any seven of the above three squeezing rolls, for example, squeezing roll l, are used as master squeezing rolls, the other two squeezing rolls J and 1 are used as sub-squeezing rolls, and sub-squeezing rolls 4 and 4 are used as master squeezing rolls. It follows the squeezing roll l and moves in the X-co and x-J force directions. Master squeeze roll 4
By applying a signal from the servo pulp/ll of the appropriate command, the cylinder t is actuated to move the squeezing roll 4 back and forth, and the position detector l! A signal current corresponding to that position is emitted from , feedback is fed back to the comparator circuit 2j,
Compare it with the applied signal current and move the squeeze roll 4 back and forth @75 until the difference between the two reaches M tp.

The position signal from the master drawing roll 51J of the master drawing roll l is sent to each sub-drawing roll at the same time! , d servo pulp/
Apply power to De and Koσ through comparison circuits KoJ and Ko4, and sub-diaphragm rolls for each! , t serves as a position detector/1
The position signal is compared with the position signal from 17°, and the sub-shrinking rolls j and a are moved back and forth until the difference becomes 0, as described above.

FIG. 2 shows an example in which a copying plate is used as the command means]/. That is, a copying plate Jσ is attached to the machine base in the appropriate position, and a stiff roller J/ is placed opposite to the carriage J.
The short roller J/ is connected to a potentiometer jJlc, and the potentiometer koko generates an electrical signal indicating the distance of the short roller J/ from the reference line.

As a result, as the carriage J moves, a position signal along copying play 1-JO is emitted from the potentiometer coco, and the master squeezing roll l moves back and forth along the squeezing direction X/ in response to this, and the master squeezing roll 4 The transition is sub-diaphragm roll 5
It is transmitted to the ゜4 side. Therefore, all squeeze rolls a, j
, t move back and forth in synchronization with the movement of the carriage J, and draw the workpiece W into a shape that follows the plate Jσ.

The command means] / is of course not limited to this, and for example, a numerical value set in relation to the transfer of the carriage J from an NC control mechanism (not shown) is sent to the servo valve /lj of the master squeezing roll l by the comparison circuit here. The voltage may be applied via the

Figure @4 is a block circuit showing seven examples of electric circuits for implementing the present invention. In the figure, Jj is an amplifier circuit, J(1
,J! , Jt are servo pulp /r, /W, and σ, respectively.
The drive circuits J 7 and J t are correction value adjusters. Other parts that are the same as those described above are given the same reference numerals and explanations will be omitted. The above correction value adjuster J7. Jr is for mounting position correction, and the correction value signal is compared with the circuit J.

Each proofing roll is adjusted by applying voltage to each calibration roll.

j and t can be located at the same distance from the processing center as the old bar. Or each squeeze roll a,! , t may be set at positions shifted from the processing center by 1Illt, and may be used as rollers for rough drawing, semi-finishing, and finishing. However, in this case, each proofing roll a, Z, and t are moved along the processing axis. Of course, the positions can be sequentially shifted.

Effects of the Invention According to the present invention, the seven squeezing rolls are master rerolls, a is a sub-squeezing roll, and the sub-squeezing roll follows the master squeezing roll.
It is easy to determine the position of each aperture roll, which was considered difficult in the past, and the relative position of each aperture roll can be constantly oriented.
Since it is possible to maintain c, it is possible to improve processing quality. Further, the present invention can also be applied to NG control, and has the advantage of enabling a-separate operation.

[Brief explanation of drawings]

Fig. 7 is an explanatory diagram of the principle of the method of the present invention, Fig. 2 is a schematic explanatory diagram of a spinning machine for practicing the present invention, etc. Between the circuit blocks. l is the spinning machine, a, S, t are the squeeze h rolls,
/J, /l, 17 is the place l! lIi detector, W is the workpiece. Patent applicant: Nikki Spin Fle Seizo Co., Ltd. Agent: Kiyoaki Hayashi 1] 7 other people No. 10

Claims (1)

[Claims] In a spinning machine in which a plurality of squeeze rolls are arranged approximately symmetrically with respect to a rotating workpiece and each roll performs drawing processing at the same time, each squeeze roll is provided with a position detector in the drawing direction. , one appropriate aperture roll is used as a master aperture roll, the position signal from the position detector of this master aperture roll is used as a reference, and each other aperture roll uses the position signal from each position detector and the master aperture roll as a reference. A drawing method in a spinning machine characterized by controlling the movement of each drawing roll as a master drawing roll based on a position signal from a roll position detector.