JPS5835013A - Manufacture of tapered rod - Google Patents

Abstract

PURPOSE:To control a die gap basing on the set value and to mass produce a tapered rod, by drawing a material to be worked from a gap of roller dies opposing to each other, and detection sectional dimensions at a prescribed point. CONSTITUTION:A wire rod diam. detector 3 is provided to the point being a prescribed distnace away, in the advancing direction of a material to be worked, from roller dies 1 and 1'. As the dies 1 and 1' and the detector 3 are separated by the prescribed distance, a taper setter 5 transmits the die-gap-computed data to an arithmatic device 6 so as to increase a die gap in a range of A of the material M, to decrease the gap in ranges of B and C, to increase the gap in a range of D. Next, the die gap value is computed with the device 6 by substituting a diametral value of the material M, inputted to the device 6 through A and D converters 4, into said data, and a controller 7 outputs a control-driving signal to a screw down mechanism 10 through a hydraulic pulse motor 9 so as to bring the die gap close to the computed value.

Description

[Detailed Description of the Invention] This invention is a method for manufacturing a taber rod, in which a metal material such as a round bar or a square bar is subjected to four-radius processing to gradually change the cross-sectional area in the longitudinal direction to form a taber portion. Regarding
It is an object of the present invention to provide a method for manufacturing Taber rods of desired dimensions economically and in mass production.

The gist of the invention is a method for manufacturing a desired Taber rod by drawing a workpiece from a gap between opposing roller dies at a temperature below warm, and gradually changing the longitudinal cross-sectional area of the workpiece. , a taber characterized in that the cross-sectional dimension of a predetermined point in the traveling direction of the workpiece is detected from the roller die, and the gap between the roller dies is controlled based on a predetermined taber setting value and the detected value of the cross-sectional dimension.・It's in the manufacturing method of the rod.

Hereinafter, embodiments of the present invention will be described based on illustrations.

FIG. 1 is a diagram showing a device for controlling the gap between roller dies.

This control device has a wire diameter detection Ws3 that detects the diameter of the workpiece MO and converts the detected value into an electrical signal, and a Taber setting value, and the electrical signals from the wire diameter detection a3 are A, D.
Taber settings I#j input via a converter,
Electrical signal from Taber setting 11j and A, D converter I
An arithmetic circuit ≦ calculates the gap value of the roller dies /, l' based on the electric signal from the wire diameter detector JTh etc. inputted via I, and the current gap of the roller dies /, /' via the rotary encoder lt. Input the signal indicating the value and also input the signal from the arithmetic circuit to
.

Consisting of a controller (contact) that sends an output to a hydraulic pulse motor to control the distance between l' and m, and a die lowering mechanism IO that inputs a signal from the hydraulic pulse motor 9 to fully adjust the gap between the stomach and Radice /, /'. has been done. A is a tension mechanism that pulls out the workpiece M.

Next, we will explain the more specific configuration of wire diameter detection @J. The workpiece M is placed between the light source and the image sensor, and the width of the light detected by the image sensor is converted into the number of pulses. It is used to measure the diameter of the workpiece M, and is carried out at a predetermined distance 1 in the direction of movement of the workpiece M from the helmet / , /'.
They are installed at 11 locations (Figure 2). The output side of the wire diameter detector 3 is connected to the Taber setting Hs and the arithmetic circuit B via the A-D converter tYr.

The Taber setting device S is set with the diameter hmax of the large diameter portion, the diameter hmin of the small diameter portion, and the inclination angle θ of the outer peripheral surface of the Taber red to be manufactured as shown in FIG.

Then, the distance between the roller die l,/' and the wire diameter detector 3 is a predetermined distance! Since Taber Red manufactures the large diameter part and the small diameter part sequentially, the diameter ha of the workpiece M from the wire diameter detection m3 increases sequentially, so that hmin Shs≦hmax -21- tanθ/2
Between (A in Fig. DA), roller die/, l' is 11111 (see Fig. 1).
h = hl+21 tanθ/2 to increase
, , , ■, and hmax −2(l tanθ/2s hs ≦
hmax (between 0 (between 8 in Fig. 1), the gap h between the roller dies / , /' decreases h = , 2 hmax - J l!tanθ/2hO
Assuming that a>-p■, the diameter of the workpiece M from the wire diameter detector 3, h, decreases sequentially, hmaxa hl 2 hmin + col tan θ/2
At the function (between 0 in Figure DA), h = h@-21tan a/2 so that @h decreases between roller die/, l'...
(1), and hmin + 21 tanθ/2 ≧ho2h
Between min (between 0 in Figure 1), h = 2hmin + 21tanθ/2-ha to increase ah between p-Raddyce/ and /'.
-.■, and the data of the formula for calculating mht between the roller dies i and t' is transmitted to the Taber setting m5Fi arithmetic circuit B based on the increase/decrease state of the diameter ho of the workpiece M and its value.

The calculation circuit 6Fi inputs the data of formulas ■ to 2〇 selectively output from the Taber setting device j, and enters the value of the diameter he of the workpiece M input via the A and D converters≠ into the formula. The roller die l,/' gap value hYr is calculated by substitution, and the calculation result is sent to the controller 7.

A signal indicating the current gap value of the roller dies / , /' is inputted to the control rough through the rotary encoder 1rt, and the gap calculation value sent from the calculation circuit 6 is set as a target value. A control drive signal is output to the hydraulic pulse motor 9 so that the gap approaches the target value.

The die lowering mechanism 10 has a structure in which the roller dies / , /'t are moved up and down by a hydraulic pulse motor to change the gaps between the four roller dies / , /', and the die lowering mechanism IO is equipped with a rotary encoder l. is installed, and the rotary encoder l is a roller die/
, /' are changed to an all-digital signal and transmitted to the controller 7.

Next, the entire operation of this control device will be explained.

The workpiece M is pulled out from roller dies l/I by a tensioning mechanism, and taber processing is performed by changing the gap between the roller dies l, /'.Then, the gap between the roller dies /, /' is controlled. The process is divided into four sections depending on the state of increase/decrease in the diameter h of the workpiece M and its value.

! When the I diameter detection fence 3 detects the diameter h@ of the workpiece M between A shown in Fig. 81, that value is input to the Taber setting device and the calculation circuit 6 via the AD converter. , the diameter he of the Taber setting device j increases sequentially, and after confirming that it is within the range of bmxn≦h・≦hmax−coj tan f)/2, the data of formula
to communicate. The arithmetic circuit B substitutes the value of the diameter ho into the formula (2), performs the arithmetic operation, and sends the result of the arithmetic operation to the controller 7. Control stomach 7 is the current roller dice / , /
'Is the gap value input and the hydraulic pulse motor using the calculation result as the target value? 1 to drive the die lowering mechanism 10' to achieve the target gap value.
/', widen llI.

The wire diameter detector 3 detects the workpiece M between 3 shown in the diagram.
When the diameter ho is detected, the Taber setting device j detects the diameter ho.
is increasing sequentially, and hrriax−λl ta
n (J/2 ≦he≦hmax), and transmit the data of formula (■) to the arithmetic circuit (B). Substitute the value of the arithmetic circuit 6Vi diameter hO to the formula (■) to obtain the operation IIg. The calculation result is then sent to the controller 7.
The control rough narrows the distance between the roller dies / and /' through a hydraulic pulse motor and a die lowering mechanism to reach the target gap value.

When the wire diameter detector 3 detects the workpiece MO diameter hot-Ll between 0 and 0 shown in the SII diagram, the Taber setting Jilj
#i diameter decreases sequentially, and hmax, i
! After confirming that it is within the range of h 112 hmin + Jl tan, the data of the equation (2) is transmitted to the arithmetic circuit (2), and when the arithmetic circuit ≦, the value of the diameter ha is substituted into the equation (2) to perform the arithmetic operation. Then, the calculation result of the calculation circuit ≦ is sent to all the controllers 7, and the controller 7 narrows the gap between the roller dies 11t so as to reach the target gap value via the hydraulic pulse motor die lowering mechanism.

If the wire diameter detection 817 detects the diameter h of the workpiece M between D shown between w11, the Taber setting 11j#
i diameter ha decreases sequentially, and hmin ten J l
After confirming that tanθ/2≧ha≧−1n′−, the data of formula ① is transmitted to calculation circuit ②, and calculation circuit t substitutes the value of diameter h・ into formula ② and performs calculation. Do this. Then, the calculation circuit 6 sends the calculation result to the controller 7, and the controller 7 outputs the calculation result to the controller 7.・Widen the p-radice l/I gap by using the die lowering mechanism ^ to reach the target gap value.

Below, the above A, B-G! The gap control of p-Ladice /, /' between and D is repeated to produce Taber red having a predetermined cross-sectional dimension.

Then, the diameter hmaX of the large diameter part of the Taber Red to be manufactured
, the diameter km1n of the small diameter part and the inclination angle 0 of its outer circumferential surface are set in advance, and the diameter h of the predetermined lead layer l is detected from the roller dies /', /' to perform the Taber processing, so the tension mechanism λ It is possible to manufacture a Taber red having a predetermined length with a constant longitudinal length regardless of the drawing speed of the die, making it possible to economically mass-produce it.

Although the manufacturing of Taber Red having a round cross section has been described in the example shown in the figure, in order to manufacture Taber Red of a workpiece material having a square cross section, it is necessary to use a required number of P-
This can be achieved by using a roller die, providing a necessary number of devices for detecting the cross-sectional size corresponding to the cross-sectional cane, and controlling the distance between each roller die in the same manner as in the embodiment.

As described above, the present invention detects the cross-sectional dimension at a predetermined point in the traveling direction of the workpiece from the roller die, and determines the gap between the roller dies based on the predetermined Taber setting value and the detected value of the cross-sectional dimension. control, it is possible to economically mass-produce Taber Red with desired dimensions.

[Brief explanation of the drawing]

Claims (1)

[Claims] A method for manufacturing a desired Taber rod by drawing a workpiece from a gap between opposing roller dies at a temperature below warm, and gradually changing a longitudinal cross-sectional area of the workpiece, the method comprising: The Taber die is characterized in that the cross-sectional dimension at a predetermined point in the traveling direction of the workpiece is detected, and the gap between the roller dies is controlled based on a predetermined Taber setting value and the detected value of the cross-sectional dimension. How to make rods.