JP2534531B2 - Drawing method of spinning machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a drawing method for a spinning machine.

[Conventional technology]

A copying template is used as a means for drawing with the spinning machine, and a copying roller is brought into contact with the copying template, and the copying roller moves in the axial direction together with the drawing roller and moves forward and backward in the direction perpendicular to the axial center by the template. Then, a method is adopted in which the forward / backward movement is electrically detected, and the squeezing roller is similarly moved forward / backward in a direction perpendicular to the axis by the electric signal to perform the squeezing processing into a predetermined shape.

[Problems to be Solved by the Invention]

When drawing with the above copy template,
When manufacturing a wide variety of products, it is expensive because it is necessary to manufacture a copy template for each product, and it is difficult to make fine adjustments because the copying mechanism is complicated and the copying mechanism is complicated. There are problems such as

In view of such a point, the present invention makes a necessary drawing processing program NC and stores it in a storage medium, inputs the processing program to the main control unit of the spinning machine using this storage medium, and follows the input processing program. The purpose is to move the squeezing roller and perform the required squeezing.

[Means for solving the problem]

The present invention for achieving the above-mentioned object, while drawing a product shape or drawing shape by a computer, as a drawing processing program in consideration of processing conditions, an input unit for converting into NC data and inputting to the storage medium IC, A main control unit for connecting the input unit, the main control unit sets the numerical value of the input machining program as a target value, and the target value and the current position signal from the position detector for detecting the position of the aperture roller. An output according to the difference is applied to an electro-hydraulic servo mechanism for driving the squeeze roller, the squeeze roller is moved by the servo mechanism, and squeezing is performed according to a processing program.

[Work]

The main control unit of the spinning machine sets the machining program input by meeting the storage medium as the target value, detects the current position of the machining roller with the position detector, compares them, and sets the machining roller to the predetermined position of the machining program. The correction is made, and thereafter the process is transferred according to the machining program.

〔Example〕

The figures show an embodiment of the invention. FIG. 1 is a schematic explanatory view of the whole, and a spinning machine 1 includes a rotating spindle 2, a mandrel 3 attached to the rotating spindle 2, and a drawing roll 4 for drawing a work W along the mandrel 3. A tool rest 5 to which the squeezing roll 4 is attached is placed on the reciprocating allowance 6 so as to be movable in the front-rear direction, that is, the X-axis direction with respect to the mandrel 3, and the reciprocating stand 6 is mounted on the mount 16 at the Z-axis perpendicular to the X-axis direction. It is mounted so that it can move in any direction. 7 and 8 are turrets 5,
Drive cylinders for moving the carriage 6 forward and backward respectively, 9 and 10 are servo valves. Further, 11 and 12 are position detectors that detect the current positions of the tool rest 5 and the carriage 6, and use a linear scale that emits a pulse signal at a predetermined pitch with the transition.

Reference numeral 13 is a control mechanism for moving the tool rest 5 and the shuttle 6 forward and backward, and includes a main control unit 14 and an input unit 15. This input section 15
A storage medium for storing NC data (eg, floppy disk, IC card, tape, etc.) is designed to accept an IC.

Reference numeral 20 is a computer for inputting a drawing process program to the storage medium IC, and includes a computer main body 21, a keyboard unit 22, and a display unit 23. According to the present invention, this computer draws a product shape or a drawing shape (hereinafter collectively referred to as a drawing shape), creates a drawing program in consideration of processing conditions, converts it into NC data, and inputs it into the storage medium IC. The procedure is shown in Fig. 2 and below.

Fig. 2 shows the main body of the diaphragm shape by operating the keyboard 22.
3 shows a diaphragm shape 24 calculated by 21 and displayed by the display unit 23. The diaphragm pattern 24 is composed of a diaphragm shape line 25 and a multi-cycle line 26. The point of the aperture line 25
The flat portion is from P1 to point P2, and the drawing process is from point P2 to point P3.

Various shapes are applied to the multi-cycle line 26 depending on the shape of the drawing, the spreadability of the material, the difficulty of drawing, and the like. As an example, the drawing shows the radial direction (X
It shows a method of reciprocating in the axial direction) and progressively drawing in the Z-axis direction. In designing the multi-cycle line 26, first, the base point Pa is set. This point also serves as a starting point, and a horizontal lower reference line 30 passing through this base point Pa is drawn.
An upper reference line 31 is drawn above the aperture shape line 25. The upper reference line 31 is determined based on the outer diameter of the workpiece W, and the point P5 at one end of the reference line is close to the drawing line 25 because the outer diameter of the workpiece W decreases as the drawing process progresses. Provide at the position.

Then, a straight line 32 (shown by a dotted line) with an appropriate angle A is drawn from the base point Pa, the intersection with the upper reference line 31 is set to 33a, and the base point Pa and the intersection 33a are connected by a curve 34a having an arbitrary radius R. The curved line 34a may be a straight line, but it is a curved line and is preferably a curved line.

Next, a curve 34b, 34c, ... 34 (n + 1) is drawn on the lower reference line 30 with a constant pitch T, passing through the break points 35a, 35b, ... Let the points of intersection with the line be 33b, 33c ... 33 (n + 1). The intersection of each of the curves 33a, 33b, ...
a, 36b ..., and this intersection and the above intersections 33a, 33b ...
And are connected by curves 37a, 36b, ... Of radius R.

In the figure, Pb is a retracted position, Pc is a waiting position, and 38 is a feedback circuit.

Next, the fourth part of the program production procedure for multi-cycle drawing
It will be described with reference to the drawings. The squeeze roll in the waiting position is first moved to the start point Pa, and following the curve 34a, the intersection P4 follows the squeeze shape line 25, and the intersection 36a reaches the intersection 33a to squeeze the workpiece W in the outer peripheral direction. Then, it squeezes toward the center direction, goes back from the intersection 36b along the squeezing shape line 25, passes the intersection 36a, and shifts the overlapping distance of an appropriate length, turns back at the point 40a, returns to the intersection 36b, and reaches the intersection 33b. Thereafter, the drawing is performed in the same manner, and after reaching the final point 36 (n + 1), the drawing is finished from the retracted position Pb through the feedback circuit 38 to the waiting position Pc.

The above drawing locus is added to the drawing speed of the drawing roller, converted into NC data, and input to the storage medium IC.

The storage medium IC to which the machining program in the form of NC data is input is inserted into the input unit 15 of the control mechanism 13, and the input unit 15 reads this and transmits it to the main control unit 14.
The main control unit 14 includes a display unit 50 and a keyboard unit 51 as shown in FIG. 5, for example. The machining program is displayed on the display unit 50 with alphanumeric characters. For this, the method of machining NC data used for ordinary machine tools can be applied.

The main control unit 14 sets the numerical value of this machining program as a target value, gives an output to the servo valves 9 and 10 according to the difference from the signal of the current position from the position detectors 11 and 12, and draws according to the program. To do.

〔The invention's effect〕

According to the present invention, the machining program is produced by using a computer separate from the spinning machine, stored in a storage medium, input to the main controller of the spinning machine using this storage medium, and the input machining is performed. The numerical value of the program is used as the target value, the aperture roller detects the current position with the position detector, and the processing is carried out by shifting according to the processing program of the above target value, making it easy to create the processing program Even if the change occurs, the change can be easily made only by inserting a corresponding storage medium, and since the movement of the squeezing roller is performed by the position detector, there is an effect that it can be surely performed.

[Brief description of drawings]

FIG. 1 relates to an embodiment of the present invention, and FIG. 1 is an overall schematic explanatory view,
Fig. 2 is a drawing of the diaphragm shape, Fig. 3 is a design drawing of the multi-cycle line,
FIG. 4 is a multi-cycle diagram, and FIG. 5 is a front view of the main controller. 1 is a spinning machine, 4 is a squeezing roller, 7.8 is a drive cylinder, 9.10 is a servo valve, 11.12 is a position detector, 13 is a control mechanism, 14 is a main control unit, 15 is an input unit, IC is a storage medium, W
Is a workpiece.

Claims (1)

(57) [Claims] 1. An input unit for drawing a product shape or a drawing shape by a computer and converting the NC data into a storage medium IC after inputting the drawing program into a storage medium IC by adding processing conditions to the input unit and a main unit for connecting the input unit. The main control unit is provided with a numerical value of the input machining program as a target value, and outputs an output according to the difference between the target value and the current position signal from the position detector that detects the position of the aperture roller. A drawing method for a spinning machine, characterized in that the drawing is applied to an electro-hydraulic servo mechanism for driving a drawing roller, the drawing roller is moved by the servo mechanism, and drawing is performed according to a processing program.