JPS63287572A - Lubricant feeder for pressing machine - Google Patents

Abstract

PURPOSE:To improve the workability of pressing by opening a switching means, discharging lubricant with a discharging means to a lubricant blotting means and nearly equalizing the blotting amount of lubricant to a work when the number of press strokes by dies has reached a required number. CONSTITUTION:In a lubricant blotting means made of felt, a work carried in between a pair of dies is impregnated with lubricant. In a lubricant discharging means made of a lubricant discharging nozzle, lubricant is discharged into the said lubricant blotting means. In addition, a switching means 21 made of an electromagnetic solenoid valve makes and breaks the said lubricant discharging means. A counting device 27 made of a press counter circuit counts the number of press strokes. When a counting number of the counting device 27 reaches a required number, a control device containing a timer circuit 33 opens the switching means 21 and discharges the lubricant into the lubricant blotting means. As a result, the lubricant blotting amount becomes nearly constant to the work and the workability of pressing can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a processing oil supply device that supplies processing oil to a metal workpiece to be press-formed. ' [Prior Art 1 In order to improve the lubrication and cooling properties of the mold for the workpiece and to improve the precision of press working, processing oil is attached to the workpiece to be pressed. The conventional processing oil supply method is as follows:
A discharge nozzle is installed in front of the molds to be pressed, and when the molds are released from each other, a hydraulic pump is driven to discharge pressurized processing oil onto the workpiece carried between the molds and adhere to it. I'm letting you do it. The amount of machining oil discharged to the workpiece is set by an oil amount adjustment valve depending on the material of the workpiece, press working time, etc.

[Problems to be Solved by the Invention] However, in the conventional machining oil supply method, although the adhesion period of machining oil to the workpiece has a great influence on the press working length of 151 m, it is difficult to process the optimum amount. The oil had to be finely adjusted each time using an oil pressure adjustment valve depending on the material of the workpiece, the press processing time, etc., resulting in poor press work efficiency. Furthermore, in the conventional method, processing oil is attached to the workpiece in a so-called drip sink, making it difficult to control the amount of processing oil applied to the workpiece.

[Objective of the Invention 1] In view of the above-mentioned conventional drawbacks, the object of the present invention is to improve the workability of press working by stably supplying an optimum amount of working oil according to the material of the workpiece, press working time, etc. An object of the present invention is to provide an oil supply device for a press processing machine that can be used in a press processing machine and can easily control the amount of processing oil.

[Means for Solving the Problems] Therefore, the present invention provides a processing oil adhering means for impregnating processing oil to be applied to a workpiece carried in between a pair of molds for press-forming the carried workpiece; A machining oil discharge means for discharging machining oil to the machining oil adhesion means, an opening/closing means for driving the machining oil discharge means r# closed, a counting means for measuring the number of times of press working, and a word value of the counting means are required. A machining oil supply device is constituted by a control means for opening the opening/closing means and discharging machining oil to the machining oil adhering means when the number reaches the machining oil adhesion means.

[Operation of the Invention] Since the present invention is configured as described above, the machining oil impregnated in the machining oil adhesion means is adhered to the workpiece carried between the pair of molds. Then, when the count value of the 31 number means for counting the number of times of press working by the pair of molds reaches the required number, the control means is activated and the opening/closing means is opened. As a result, the machining oil is discharged by the machining oil discharge means to the machining oil adhering means, and the adhesion of the machining oil to the workpiece is made almost uniform.

[Example] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of a press machine equipped with a processing oil supply device according to the present invention. A fixing plate 5 is attached to a frame 3 of a press machine 1111, and a mold One of the female molds 7 is attached. A movable plate 9 is supported on the frame 3 above the female die 7 so as to be movable up and down, and the movable plate 9 is moved up and down by the operation of a connected crank mechanism, hydraulic cylinder, etc. A male mold 11, which is one of the molds, is attached to the movable plate 9.

Felts 13 and 15 are provided on the frame 3 corresponding to the passing positions of the workpiece 17 to the female die 7 and the male die 11, and are impregnated with machining oil and serve as machining oil adhesion means, and between the felts 13 and 15, A workpiece 17 made of a metal plate to be pressed is arranged so as to be able to pass therethrough under pressure. This workpiece 17 is placed above the felts 13 and 15 in the conveying direction, and is moved between the female die 7 and the male die 11 by a pair of upper and lower feed rolls 18 connected to an electric motor (not shown).
transported between. A machining oil discharge nozzle 19 constituting a machining oil discharge means is attached to the frame 3 corresponding to the upper side of one of the felts 13, and the machining oil discharge nozzle 19 is connected via an electromagnetic solenoid valve 21 and a hydraulic pump 23 as opening/closing means. It is connected to the processing oil tank 25. still,
A relief valve 24 is attached to the hydraulic pump 23,
When the machining oil sucked from the machining oil tank 25 by the relief valve 24 reaches a required oil pressure, it is returned to the machining oil tank 25, so that the pressure of the machining oil is always kept almost constant. .

FIG. 2 is an electrical block diagram showing the outline of drive control of the electromagnetic solenoid pulp 21, and a press counter circuit 27 as a counting means is connected to a detector 29 such as a limit switch that comes into contact with a movable plate 9 that moves upward after pressing. is sequentially incremented based on the detection signal, and the number of press operations is counted.

The press counter circuit 27 outputs a counter signal when its count reaches a predetermined number set by the setter 31. The predetermined count value by the press counter circuit 27 is arbitrarily set according to the material of the workpiece 17, the press processing time, etc. A display device 28 is connected to the press counter circuit 27, and the set value by the setting device 31 and the press count number are displayed on the display device 28, respectively. The timer circuit 33 is set when a counter signal is input from the press counter circuit 27,
A drive signal is applied to the base of drive transistor 36 for the required time period set by variable resistor 35 . The time required by the timer circuit 33 is arbitrarily set depending on the application of machining oil to the indicator 17, etc. Incidentally, a display device 34 is connected to the timer circuit 33, and the display bag @
34, the predetermined time set by the variable resistor 35 is displayed. Further, the timer circuit 33 outputs a reset signal to the press counter circuit 27 after a predetermined period of time has elapsed to reset the press counter circuit 27.

The drive transistor 36 has its base connected to the tie 7 circuit 33, its collector connected to the solenoid coil 37 of the electromagnetic solenoid valve 21 connected to the drive power supply VD, and its emitter grounded, and when a drive signal is applied to the base. The solenoid coil 37 is electrically connected to the drive power source VD.

As a result, the solenoid coil 37 is energized and If
The la solenoid pulp 21 is opened. The timer circuit 33 and the drive transistor 36 constitute a control means 40 for controlling the opening and closing of the electromagnetic solenoid valve 21. Next, the operation of the press 1111 configured as described above will be explained.

After the workpiece 17 passes between the felts 13 and 15, its front end is positioned between the female die 7 and the male die 11. At this time, the felts 13 and 15 are impregnated with a required amount of processing oil, and the processing oil is almost uniformly adhered to the upper and lower surfaces of the work 17 passing through the felts 13 and 15.

When the movable plate 9 is moved downward in the above state, the workpiece 17 is pressed into a desired shape by the female die 7 and the male die 11. When the movable plate 9 is moved upward after the press working, the press counter circuit 27 is incremented by one based on the detection signal from the detector 29. Further, as the movable plate 9 moves upward, the workpiece 17 is conveyed between the female die 7 and the male die 11 while passing between the felts 13 and 15 as the feed roll 18 rotates. At this time, as the workpiece 17 passes between the felts 13 and 15, a required amount of machining oil is attached to the upper and lower surfaces of the workpiece 17.

Along with the above-described press processing, the press counter circuit 2
When the number of words of 7 reaches a predetermined number set by the setter 31 according to the material of the workpiece 17, press processing time, etc., a counter signal is output from the press counter circuit 27, and a timer is activated based on the counter signal. Circuit 33 is activated. As a result, the timer circuit 33 applies a drive signal to the base of the drive transistor 36 for the required time period set by the variable resistor 35 to make the drive transistor 36 conductive, thereby supplying the drive power V to the solenoid coil 37.
D is energized. Then, the electromagnetic solenoid valve 21 is opened by energizing the solenoid coil 37 with the driving power supply VD, and the machining oil pressurized to the required oil pressure by the hydraulic pump 23 is supplied to the felt 13 through the machining oil discharge nozzle 19.
-15. As a result, machining oil is replenished to the felts 13 and 15 whose oil content has decreased due to the adhesion of machining oil to the workpiece 17, and the felts 13 and 15 are kept approximately constant in the amount of machining oil that adheres to the workpiece 17. Addition in step 15: The oil content of the L oil is adjusted.

In this way, in this embodiment, processing oil is discharged onto the felts 13 and 15 for a required time for each number of press operations preset according to the material of the workpiece 17, the press operation time, etc., and the oil content ω is approximately reduced. By keeping the amount constant, it is possible to equalize the amount of machining oil that adheres to the workpiece 17.

In the above embodiment, instead of controlling the opening time of the electromagnetic solenoid valve 21, the opening dimension of the electromagnetic solenoid valve 21 may be controlled.

[Effects of the Invention] Therefore, the present invention can stably supply the optimum amount of processing oil according to the material of the workpiece, the press processing time, etc., improve the workability of press processing, and reduce the amount of oil added. It is possible to provide a processing oil supply device for a press machine that allows easy quantity control.

[Brief explanation of the drawing]

FIG. 1 is a front view of a press machine equipped with a processing oil supply device according to the present invention, and FIG. 2 is an electrical block diagram schematically showing drive control of an electromagnetic solenoid valve. In the figure, 1 is a press processing machine, 7 is a female mold, a mold,
11 is a male die which is one of the molds, 13 and 15 are felts as processing oil adhesion means, 17 is a workpiece, 19 is a processing oil discharge nozzle as an additional oil discharge means, and 21 is an electromagnetic solenoid as an opening/closing means. 27 is a press counter circuit as a counting means, and 33 is a timer circuit as a timer means.

Claims (2)

[Claims] (1) A press processing machine that presses a carried workpiece using a pair of molds, comprising: a processing oil adhering means for impregnating the workpiece carried in between the pair of molds with processing oil; A machining oil discharging means for discharging machining oil onto the machining oil adhesion means, an opening/closing means for driving the machining oil discharging means to open and close, a counting means for measuring the number of times of press working, and a count value of the counting means reaching a required number. A machining oil supply device comprising: control means for opening the opening/closing means and discharging machining oil to the machining oil adhesion means when (2) The processing oil supply device according to claim 1, wherein the control means includes timer means for opening and closing the opening/closing means for an adjustable required period of time.