JPS62173100A - Operating method for hydraulic press - Google Patents

Abstract

PURPOSE:To execute die mating and air venting under optimum conditions by preliminarily manually operating an operation switch to execute one cycle of press operation in the finest working sequence, storing the working sequence in a computer and reproducing the working sequence in automatic mode after the 2nd and subsequent cycles. CONSTITUTION:An operator executes the working sequence incorporated with the finest die mating and air venting conditions by manually operating the operation switch 31 consisting of a solenoid valve switch 41 which permits the free manual selection of the energization of a solenoid valve coil, a mode switch 43 which permits selection of automatic, manual and memory mode, and a pump switch 42 which can start and stop a hydraulic pump. The operation sequence and working time of the switch 31 are preliminarily stored into the computer 52. The stored working sequence is reproduced in the automatic mode in the 2nd and subsequent cycle and therefore, the pressing is executed automati cally under the optimum conditions meeting the die mating and air venting pattern.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a teeing method for operating a rubber firing hydraulic press, a resin molding hydraulic press, or other hydraulic presses that frequently undergo processing and pressure release.

[Conventional technology]

For example, let's take a conventional standard 1 hydraulic press for rubber firing.
(The Noikle procedure will be explained based on FIG. 5.

△, Fill the mold with raw rubber, set it in a hydraulic press, and place the mold between the piston located on the lower side of the hydraulic press and the pressure receiving plate located on the upper side.

B. Mold matching (first piston rise) In this die matching, the first piston rise after setting in the press is done at slow speed or inching while being careful to ensure that the lower mold and upper mold engage as specified. It is better to gradually raise the mold. If they do not fit as specified, the upper and lower molds may not separate or the mold itself may become unusable.

In addition, the raw rubber has high fluidity, and when rapidly pressurized, the raw material (
Since much of the raw rubber (raw rubber) flows out of the mold and there is a large loss of raw material, it is necessary to slow down the rising speed or perform an inching operation as described above.

C. If the raw material (cow rubber) cannot be pressed to the details of the mold after the air treatment and mold matching, U
To maintain stability, the piston is moved up and down to repeatedly pressurize and release the pressure. This is usually called air handling.

This varies depending on the shape of the mold, the thickness of the ripples, the raw material (cow rubber), etc. Sunset 11'! There are differences between the two, and skill is required.

For the reasons mentioned above, this air removal has a significant impact on the product yield.

D. Pressurization J3 and firing (vulcanization) F. Leave in the state of D for a predetermined period of time. controlled within.

The above is the standard one-cycle procedure for GolX firing, and there is a conventional hydraulic press for carrying out this process, for example, as shown in FIG. 6.

As shown in FIG. 6, the hydraulic system includes an oil tank 11 for storing hydraulic oil, a pump 12 for obtaining hydraulic pressure, and an electric motor 13 for driving this pump 12.
It is depicted by a pressure regulating valve 14 that maintains the working oil pressure at a set pressure, a solenoid valve 15 that switches the flow direction of the working oil, and a hydraulic press 16. Each part is connected by an oil passage. The electromagnetic valve 15 is of a type that switches the flow direction of the hydraulic oil by exciting the left and right coils 15a and 15b, respectively. The hydraulic press 1C also includes a hydraulic cylinder 17 containing hydraulic oil, a screw 18 that moves up and down in the flow direction of the hydraulic oil, and a pressure receiving plate 19 that is mechanically fixed to the cylinder 17. It is what it is.

The workpiece (rubber mold W) consists of a screw 18 and a pressure receiving plate 19.
Sera 1 ~ will be done between.

The control system is an external timer 21 that controls the pressurized firing of the rubber from 1 to 1. ,
A counter 22 that records the number of air bleeds (the number of up and down movements of screws 1 to 18) (this is also checked by the operator before work in the same way as an external timer) and the start of operation are input. Star 1 to Switch) Input emergency stop The switch box 23 with an emergency switch that covers it and the sequence circuit with the right contact or no 1g point turn on and off the coils 15a and 15b of the solenoid valve 15 to control the movement of the piston 18. It consists of a sequence controller 24 that controls on/off of the pump motor 13, and this sequence controller 24 and each part are connected by signal lines.

Next, referring to FIG. 7, the conventional operation will be explained based on the rubber firing procedure described above.

Cellar 1 before work: The operator sets the firing time on the external timer 21, and also sets and reads the number of air treatments on the counter 22.

△, Put the cow rubber into the mold W, press the hydraulic press 1G, press the cellar 1 to the control system...The operator turns on the switch to Star 1,
The on-sign wing passes through the 5th line to the sequence controller 2
4, the sequence circuit outputs a pump-on signal, and the motor 12 is driven to operate the pump 12.

Hydraulic system: When the pump 12 operates, oil is sucked up from the oil tank 11 and discharged at high pressure from the pump 12. After the oil is regulated by the pressure regulating valve 74 through the oil passage, it is transferred to the pressure port of the solenoid valve 15. be pumped to.

Note that excess oil (differential pressure oil) in the pressure regulating valve 14 is returned to the oil tank 11 via a drain oil path.

B. Mold matching control system: After the pump 12 is activated, a signal is sent to the sequence circuit to excite the rising side coil 15a of the J:Repiston 1 to the solenoid valve 15, and this coil 15a is energized.

Hydraulic system: The electromagnetic valve spool is moved by the excitation of the coil 15a, the oil path inside the electromagnetic valve 15 is changed, and the pressure oil that was being sent to pressure saws 1 to 1 is further sent to the hydraulic cylinder, and the piston 18 is moved. raise. This screw 1~
The cylinder 18 is raised to the upper limit of screws 1 to 18 (see FIG. 7).

= 6-C, Air bleed control system...The following low-volume pattern is sent to the solenoid valve 10 repeatedly according to the set number of times on the counter 22 by the upper stomach sequence circuit.

Screws 1-n rising side coil 15a de-energizing screws 1--descent-side coil 15b excitation piston descending-side coil 15b excitation de-energizing screws 1--n rising side coil 15a excitation When the piston 18 reaches the upper limit, air bleed 1 The recycle is finished. Note that FIG. 7 shows an example in which the number of times the counter 22 is set is three.

Hydraulic system: When the signal 8 is sent from the sequence circuit to the solenoid valve 15, the oil passage inside the solenoid valve changes, and the piston 18 operates as follows.

The piston stops at the upper limit of the piston.The piston descends.The piston descends.The piston stops.The piston rises.
This is the movement of

D. The signal indicating the end of air removal from the pressurization and firing counter 22 enters the sequence circuit, from which it is output as a start signal for the external timer 21, and the external timer 21 is activated. It should be noted that the piston 18 is stopped at its upper limit, pressurizing the mold W, since the coil of the solenoid valve 15 is not excited.

E. Leaving: The product is left in the pressurized and fired state until the external timer 21 times out.

F. Press release control system: The time-up signal from the external timer 21 enters the sequence circuit and is sent to the solenoid valve 15 as an excitation signal for the piston lower side coil 15b.

Hydraulic system: When the coil 15b is energized, the oil path inside the solenoid valve changes, and the piston 18 descends to the origin of the screws 1 to 1 (FIG. 7).

G. Product Removal The worker takes out the mold W from the press 16 and takes out the product inside the mold.

The above is an example of the 1+OJ cycle of the conventional hydraulic press operating method.

[Problems to be solved by the invention] However, in such conventional automatic hydraulic press operation methods, mold matching and air removal, which are important parts of rubber firing, are standardized (as in Caratar 22). (2) There is a risk of damage to the mold due to galling (C) There is a lot of wastage of raw rubber (C) Execute with the optimal air bleed pattern However, there are problems such as poor yield in many cases (depending on the mold, the air release pattern may not match and the product may not come out). The purpose of using a teaching method is to solve the problems of the conventional method.

[Means for solving problems]

The present invention provides various operation switches 31 in place of the conventional colorator, and a computer 52 capable of storing and reproducing the actuation timing and time of each of the operation switches 31 in place of the conventional sequence circuit.
An electronic control circuit equipped with this is prepared, and the operator performs the press operation in the best procedure by operating the operation switch 31, and also stores the procedure in the computer 52 for one cycle in a memory mode (teaching). This method solves the problems of the conventional method by reproducing the work procedure in automatic mode from the second cycle onwards.

[Effect]

The present invention provides an operation consisting of a solenoid valve switch that allows an operator to freely manually switch the excitation of a solenoid valve coil, a mode switch that allows the operator to select automatic, manual, and memorized modes, and a pump switch that allows the operator to start and stop the hydraulic pump. The switch 31 is manually operated to carry out a work procedure that incorporates the best mold matching and air bleeding conditions, and the computer 52 stores the operation sequence and operation time of the operation switch 31 that the operator directly operates, and automatically performs the work procedure. This is to avoid reproducing it while driving.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to an embodiment shown in FIGS. 1 to 4. 1 As shown in FIG. 1, the hydraulic system has the same configuration as the conventional hydraulic system shown in FIG. 6, so the same parts are given the same reference numerals and the explanation thereof will be omitted.

The control system includes operation switches 31 that are directly operated by the operator, etc.
External timer 21 that sets the firing time (the same reference numeral is given because it is the same as the conventional product), and an electronic control circuit 32
It consists of

As shown in FIG. 2, the operation switch 31 is
A solenoid valve switch 41 has three positions: a contact position 41a that excites the coil 15a, a contact position 41be that excites the coil 15b, and a neutral position 41c that does not energize any of them. A pump switch 42 that obtains the working oil pressure, a mode switch 43 that has three positions: manual mode position 43a, memory mode position 43b, and automatic mode position 43c, and depending on the position of this mode switch 43, timer star 1 to signal or teaching reproduction are performed. It is composed of a star 1 switch (not shown) that sends a star 1 signal, and an emergency switch (not shown) that is turned on and shut down in an emergency.

Further, the electronic control circuit 32 includes an input port 51,
Microcomputer 52 and output port 5
In general, the microcomputer 52 includes a central processing unit (CPU), a random access memory (RAM), and a read only memory (ROM).
It is composed of.

When the mode switch 43 is in the manual mode, the input signals of each operation switch 31 and the external timer 21 are inputted to the well-known micro combi coater 52 via the implanter 1 to port 1 51, and the processing results are given to the output port 53. , controls the electromagnetic valve 15 and the hydraulic pump drive motor 13 , and sends a signal to the external timer 21 .

When the mode switch 43 is a memory mode, in addition to performing the above processing until the mode switch 43 is switched to a mode other than the memory mode, the input signal is input to the microphone 1.
At the same time that the data is processed in the microcomputer 52, its operation time J3 and order are stored (stored) in the microcomputer 52.

Roughly, if the mode switch 43 is in automatic mode,
The contents stored (memorized) in the storage mode are retrieved over time in the order in which they were stored, processed in the micro combi coater 52, and the results are sent to the solenoid valve 15 via the output boat 53.
, is sent to the hydraulic pump drive motor 13 and the external timer 21, and the operation contents in the memory mode can be reproduced without operating the operation switch 31.

Next, with reference to FIG. 3, the operation will be explained focusing on the storage mode and automatic mode operation, which are the central aspects of the present invention.

■ Setting before feeding operation When setting the baking time to the external tie and marker 21, set the mode switch 43 to the storage mode position 43b.

△, Put the rubber into the mold W and set it in the press 16...
Turn on the pump switch 42.

Control system: Signals from all operation switches 31 and external timer 21 are input to the microcomputer 52 via the input boat 51 through signal lines, and are internally branched into two systems, one for each on-time (or off-time) signal. time), and the other is output from the output boat 53 to the corresponding actuator (E, this control is performed until it is left).

Hydraulic system: High pressure oil is generated by the operation of the pump 12, and the oil passage up to the solenoid valve 15 is filled with high pressure oil.

B. Mold matching operation system: Turn on the rising side contact 41a of the solenoid valve switch 41.

Hydraulic system: Electricity r6<, the oil path inside the electromagnetic valve 15 changes due to the excitation of the valve coil 15a, and high pressure oil is sent to the head side of the cylinder 17, pushing up the piston 18.

Operation system: When the piston 18 rises to the vicinity of the pressurized region, the contact 41a is repeatedly turned on and off while paying attention to the meshing of the mold W (inching operation).

Hydraulic system: By excitation and de-excitation of the coil 15a, the screws 1 to 18 repeatedly rise and stop, eventually pressurizing the mold W, and stop rising at the upper back limit of the piston.

C. Air bleed operation system: Repeat turning on and off of the descending side contact 41b of the solenoid valve switch 41 and on and off of the rising side contact 41a, and turn each on 1121 so that the air bleed is effective according to the mold W. Select and operate the off time and off time.

Hydraulic system...The screws I to 18 descend when the descending side contact 41b is turned on, and rise when the lending side contact 41a is turned on.
1. Stop when the upper layer contact is off and the lower contact is off (neutral position). ``The order of operation of the solenoid valve switch 41 and 1.
．． Perform up and down movement following the time interval l1.

D. Pressurization and firing (pressure l1xi) Operation system: After the air is removed, turn off the pump switch 42, turn on the switch (not shown) to star 1 of the external timer 21, and activate the external timer 21. na d3
At this time, the solenoid valve switch 41 is in the neutral position.

= 15- Hydraulic system: Pump 12 stops, and screws 1 to 18 stop with pressurizing mold W at the upper limit.

E. The idle operation system is in a state of no operation. The control system also stores and processes the state of no operation.

``Press opening operation system...Turn on the pump switch according to the display of the button and lamp, and press the lowering side contact 41b of the solenoid valve switch 41.
Turn on.

Control system: The time-up signal of the external timer 21 is output as a buzzer and lamp ON signal according to a program input in advance.

Hydraulic system: Pump 12 operates, generates high oil pressure, and turns on descending side contact 15b, causing piston 18 to descend to the piston origin.

Operation system: When the screws 1 to 18 return to their original positions, return the solenoid valve switch 41 to the neutral position and turn off the pump switch 42. Then, switch the mode switch 43 to a position other than the storage mode (teaching ends).Hydraulic system...The screws 1 to 18 stop lowering, and the pump 12 stops operating.

G. Product Removal The worker takes out the mold W from the hydraulic press 16 and takes out the product inside the mold W.

The above is one cycle in the storage mode of the present invention (usually
The memory mode is an example of (teaching) performed in only one cycle. The automatic operation described below is performed based on all the stored operation signals.

■ Before automatic operation work, set mode switch 43 to automatic mode position.
- At the same time, put raw rubber into mold A and mold W and set it in press 16. Then, turn on the operation system Star 1 to Switch (not shown). In this case, it does not matter where the contact points of the solenoid valve switch 41 and the pump switch 42 are located.

The control system sequentially retrieves the teaching contents (contents stored in storage L!TI during storage mode) from the memory according to the star 1 signal and outputs them as ON/OFF signals to the corresponding actuators.

In the hydraulic system, the operations in the memory mode are repeated: B, mold alignment, C, air release, D, pressurization and firing (vulcanization), E
Execute the steps of , leaving, F, and press release. Then, in G, product removal, the worker takes out the mold W from the press,
Take out the product inside the mold.

The above is an example of one cycle in the automatic mode of the present invention. In this automatic mode, the series of steps can be reproduced in any way by turning on a start switch (not shown) unless the content (teaching content) stored during the storage mode is canceled.

[Phase] When the manual operation mode switch 43 is set to manual, each operation switch 3
The operational relationship between 1 and the actuator is the same as in the storage mode, but cannot be reproduced because no internal storage processing is performed in the microcomputer.

Finally, FIG. 4 shows a block diagram of the input signal processing procedure of the present invention.

〔Effect of the invention〕

According to the present invention, the operator manually operates the operation switch in advance to perform the press operation for 1'+J cycles in the best work procedure, and inputs the work procedure for one cycle using the operation switch at that time into the computer. Since the press operation from the second cycle onwards automatically reproduces the work procedure stored in the computer, from the second cycle onwards, the pattern of die matching and air bleeding is matched to the die. The present invention can be carried out automatically under the optimum conditions, reducing the loss of the raw material R1, smoothing the engagement of the molds, and improving the product yield through the optimum air release pattern.Furthermore, the present invention can be operated manually. Since it operates automatically based on the standard, it can also handle small-lot molds.

[Brief explanation of drawings]

Fig. 1 is a hydraulic pressure and control circuit diagram of a hydraulic press used to carry out the hydraulic press operating method of the present invention, Fig. 2 is a block diagram of its electronic control circuit, and Fig. 3 is a diagram of operation signals in the hydraulic press of the present invention. An explanatory diagram showing the relationship with piston operation,
Figure 4 shows the operating force θ of the hydraulic press of the present invention, A3 +j
Fig. 5 is a block diagram showing the procedure for processing input signals, Fig. 6 is a hydraulic pressure and control circuit diagram of a conventional hydraulic press, and Fig. 7 is a control circuit diagram of a conventional hydraulic press. FIG. 2 is an explanatory diagram showing the relationship between the number and piston operation. 12, 15...Hydraulic pump and electromagnetic valve as hydraulic related equipment, 16...Hydraulic press, 31...Operation switch, 52...Microcomputer. Procedure Neyama J-E (spontaneous) February 20, 1985 1. Indication of the case 1985 Patent Application No. 12777M 2. Name of the invention Method of operating a hydraulic press 3. Person making the amendment Relationship with the case Patent Applicant Kamo 1) Hiroshi (1 person) 4. Agent 4-3-22 Shinjuku, Shinjuku-ku, Tokyo (Ando Building) Telephone:
03-352-1561 (generation) 5, date of correction order None = 1 =・17. ! 7. Contents of amendment (1) In the first line of page 2 of the specification, the word "processing" is corrected to "pressurization." (2) Book 11, page 9, lines 6 to 7 and 1
In line 9, the word "karata" should be corrected to "counter." February 20, 1986

Claims (1)

[Claims] (1) A method of operating a hydraulic press in which the hydraulic press is operated by hydraulic equipment that can be operated manually by an operation switch and can be operated automatically by an electronic control circuit equipped with a computer that can memorize and reproduce the operating timing and time of the operation switch. The operator manually operates the operating switch in advance to perform one cycle of the press operation in the best working procedure, and inputs and stores the one-cycle operating procedure using the operating switch in the computer,
A method for operating a hydraulic press, characterized in that press operations from the second cycle onwards are carried out by automatically reproducing work procedures stored in the computer.