JP2023002008A - Machining spot number monitoring device and machining spot number monitoring method for man-power pressing machine - Google Patents

Abstract

To provide a machining spot number monitoring device which accurately counts the number of machining spots in machining work using a man-power pressing machine, and a method.SOLUTION: A machining spot number monitoring device for a man-power pressing machine includes: an impact sensor 21A for detecting an impact force operating on a processing head 6 of a foot pressing machine; a position sensor 22B for detecting a position of the processing head 6; and an arithmetic processing part for determining whether or not press working has been done by the processing head 6 on the basis of the detected impact force and the position. It is determined whether or not the press working has been done by the processing head on the basis of both the position of the processing head and an impact force operating on the processing head in the man-power pressing machine. It is possible to solve problems that the wrong determination the press working has been done due to positioning of the processing head specific to the man-power pressing machine and redoing the press working is made and that the number of machining spots is wrongly counted.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing hit number monitoring device and a processing hit number monitoring method for counting the number of processing hits in a press operation using a manual press machine.

In work using a manual press machine, the operating force of the press operator is amplified by a mechanism that utilizes the principle of lever provided in the press machine, and the pressurization force obtained by this is used to press, such as caulking, drilling, and bending the workpiece. processing takes place. In the case of press working using a manual press machine, as with a general press machine equipped with a drive source, an excess or deficiency in the number of punch points will lead to fatal defects in subsequent processes, so the number of punch points should be reduced. must be managed and monitored accurately.

Currently, the operator confirms the machining drawing, memorizes the specified machining points, performs the specified number of machining on the necessary points, and checks for excess or deficiency in the number of points in the subsequent inspection process. prevents excess or deficiency products from flowing out. With this method, human error may occur, and the number of machining points cannot be accurately managed and monitored.

In order to reduce human error in press working, a counter is used to count the completion of all the work, and an error is notified to the operator when a semi-finished product containing an unprocessed portion is to be passed to the next process. A press forgetting monitoring device is known. (Patent document 1)

In addition, a preset counter device that excites and operates with that signal is connected to the synchronous signal circuit set in the main body of general-purpose machine tools such as press machines, and the signal of one press stroke is combined with the display by the integration of the electromagnetic counter, 2. Description of the Related Art There is known a device in which power relays provided in parallel sequentially decrease a number set in a preset counter, and when the set number becomes 0, an alarm or alarm lamp notifies an operator of the end of work. (Patent document 2)

Japanese Patent Application Laid-Open No. 2001-038495 JP-A-49-129984

Here, as a human-powered press machine, by stepping on a special pedal equipped with the press machine with the power of the operator's own foot, the power is transmitted to multiple transmission arms, and the combination of these arms is used as a lever. A foot press machine (kicking press machine) that transmits the amplified force to the processing head (cylinder), and a hand force is applied to the cylinder through an arm that uses the principle of leverage via a dedicated handle. There is generally a hand press machine that performs Positioning of the product to be processed is performed by the worker aligning the product with the press processing position with his/her hand or part of the body, and while maintaining this state, he/she presses the press machine with his or her own free leg or hand. It is necessary to apply force for processing.

Since the operator needs to pay attention to both pressurization and alignment of the machining position during the press work, it is often necessary to adjust the machining position or redo the machining during the press work. It is often necessary to move the machining head up and down multiple times and to repeat machining. Therefore, simply counting the movement of the machining head (cylinder) or sensing the impact applied to the machining head often results in a discrepancy between the counted number of machining points and the actual number of machining points. .

For example, there are cases where a commercially available counter is attached to the machining position to try to count the number of machining points. For the above reason, the number of times the machining head (cylinder) is moved up and down does not necessarily match the number of machining hits, so the number of machining hits cannot be accurately counted. In addition, it is necessary to correct erroneous counts each time, and it is not possible to efficiently manage and monitor the number of processed dots.

In addition, in the case of a method that counts the number of punched points by sensing the impact that occurs during press working, repeated impacts may be applied to the machining head (cylinder) when adjusting the machining position, resulting in repeated erroneous counting. have a nature. Furthermore, when the working head (cylinder) of the manual press machine returns to the original position, it receives the same impact as during working, so there is a possibility that this impact will be detected and erroneously counted.

On the other hand, in the case of a press machine driven by a motor or air as a power source, there is a method of counting the number of punched points using a load cell, ie, a pressure sensor. In this case, it is necessary to precisely arrange the sensor section on the processing head, and a dedicated processing jig and setup are required. It is difficult to employ a method of counting the number of punched points using a pressure sensor such as a load cell in press working using a manual press that frequently changes.

In addition, a press with a power source receives a start signal from the operator and automatically performs processing until processing is completed, so there are few cases where processing stops in the middle. For example, the above-mentioned patent document 1 and patent document 2 both aim to manage a press machine with a built-in drive source, so the movement of the processing head (cylinder) and the number of processes must always match. is assumed. In the work using a manual press machine in which a worker uses his/her own physical force to press work, the vertical movement of the working head (cylinder) does not necessarily match the number of hitting points for working. The method described in 2 is unsuitable for counting the number of punched points in a working operation using a manual press.

In recent years, there has been an increase in demand for short delivery times for processed products, even though there is a large variety of products in small quantities. There are a certain amount of construction methods that require craftsmanship, and there are many cases where workers are required to manage the quality of processing and the number of processing at the same time.

An object of the present invention is to prevent a product obtained through a processing operation using a manual press from flowing out to the next process or to the outside in a state in which there is an excess or deficiency of processing points, and to perform processing in real time at the work site. To provide a device for monitoring the number of working points of a manual press capable of accurately counting the number of points, and to propose a method for monitoring the number of working points.

In order to solve the above-described problems, the number-of-work-marks monitoring apparatus and the number-of-work-marks monitoring method of the present invention for counting the number of work hits in a press operation using a manual press are performed as follows. In other words, the force applied by the operator's legs, hands, or arms is transmitted to the arm of the manual press machine, and is transmitted to the cylinder of the processing head via this arm. An impact sensor for detecting vibration or impact force is arranged on the arm portion, and a position sensor for detecting the position is arranged on the cylinder or processing head. The arithmetic processing unit captures sensor output signals from both the impact sensor and the position sensor, and performs arithmetic processing to determine whether press working has been performed using both sensor output signals. Based on the determination result of the arithmetic processing unit, the shot counter counts the number of stamped points in the press working and outputs such as a display.

As described above, the present invention provides a processing number monitoring device for monitoring the number of processing points in a press operation using a manual press having a processing head that can reciprocate between an origin position and a processing point position,
an impact sensor that detects an impact force acting on the processing head;
a position sensor that detects the position of the processing head;
an arithmetic processing unit that determines whether or not press working has been performed by the working head based on the detected impact force and the position;
It is characterized by having

Further, the arithmetic processing unit sets the impact force or the time differential value of the impact force while the machining head is positioned within a set range including the machining point position other than the origin position. If it is equal to or greater than the value, it is determined that the press working has been performed once by the working head. Furthermore, it has a shot counter for accumulating the number of hit points of the press working based on the press working determination by the arithmetic processing unit.

On the other hand, the present invention uses the processing number monitoring device configured as described above to perform processing in press work using an existing or existing manual press equipped with a processing head capable of reciprocating between the origin position and the processing point position. In the method for monitoring the number of machining points,
The impact sensor is externally attached to a portion of the manual press that can detect the impact force acting on the processing head, and the impact force acting on the processing head is detected,
The position sensor is externally attached to a portion of the manual press that can detect that the working head is positioned within a set range including the working point position other than the origin position, and the working head Detect the position of
The arithmetic processing unit, the shot counter and the impact level display unit are externally attached to the manual press machine, or installed at a position remote from the manual press machine,
It is characterized in that a worker who performs pressing work can confirm the level of impact force and the number of hit points by visually checking the impact level display section and the display section of the shot counter.

According to the apparatus and method of the present invention, it is determined whether or not pressing has been performed by the working head based on both the position of the working head in the manual press and the impact force acting on the working head. To solve the problem of erroneous determination that press working has been performed due to the positioning of the working head peculiar to a manual press machine and the redoing of press working, and the number of processed hit points being erroneously counted. Therefore, by using the apparatus and method of the present invention, it is possible to reliably prevent excess or deficiency in the number of working points in press work using a newly installed manual press or an existing/existing manual press.

FIG. 4B is an explanatory view showing the state of the press machine origin position of the foot press to which the number-of-working-spots monitoring device to which the present invention is applied, and FIG. is an explanatory diagram showing another mounting position of the position sensor. FIG. 2 is a schematic functional block diagram showing a machined number monitoring device; 4 is a time chart showing the signal processing operation of the machined number monitoring device; 4 is a flow chart showing the operation of the machined number monitoring device;

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a machine hitting number monitoring apparatus for a manual press to which the present invention is applied will be described below with reference to the drawings. The following example is for a case where the number-of-work-spots monitoring device is attached to a foot press machine, which is a manual press machine. It should be noted that the present invention is not limited to the following embodiments, and the apparatus for monitoring the number of hits in processing of the present invention can be similarly used for a manual press machine such as a hand press machine.

[Overall configuration of a foot press machine equipped with a processing number monitoring device]
The overall configuration of the foot press will be described with reference to FIGS. 1(A) and 1(B). The foot press machine 1 is, for example, an existing press machine, and is retrofitted with a processing number monitoring device. The foot press machine 1 includes a press stand 2, and a support arm 3 extending upward and forward is attached to the rear portion of the horizontal upper surface of the press stand 2. As shown in FIG. A cylinder guide 4 is vertically attached to the tip of the support arm 3 . A lifting cylinder 5 is supported by a cylinder guide 4 so as to be reciprocally movable in the vertical direction. The position directly below the processing head 6 on the upper surface of the press frame 2 serves as a work mounting surface.

A foot pedal 8 extending downward and forward is attached to the back surface of the press frame 2 . The foot pedal 8 can be depressed from the standby position shown in FIG. 1(A) to the depressed position shown in FIG. 1(B). The stepping force of the foot pedal 8 is amplified by a boosting mechanism that utilizes the principle of lever via a transmission link mechanism having transmission arms 9, 10, and 11, and is transmitted to the lifting cylinder 5 (processing head 6). be.

When the foot pedal 8 is vigorously depressed from the standby position 8A to the depressed position 8B, the elevating cylinder 5 is vigorously pushed down from the origin position HP shown in FIG. 1A to the machining point position WP shown in FIG. The head 6 presses (crimping, drawing, drilling, bending, etc.) the workpiece W placed on the workpiece mounting surface with a predetermined force. When the pedal is released, the foot pedal 8 is returned to the standby position 8A by a return mechanism (not shown) such as a weight and a return spring, and the lift cylinder 5 is also returned to the upper origin position HP.

FIG. 2 is a schematic functional block diagram showing a machined number monitoring device. As shown in FIG. 2, the number-of-working-spots monitoring device 20 attached to the foot press machine 1 includes an impact sensor section 21, a position sensor section 22, and a control unit 25 attached to the side surface of the support arm 3 on the lower end side. consists of

As shown in FIGS. 1A and 1B, the impact sensor section 21 includes an impact sensor 21A (acceleration sensor) attached to the side surface of the transmission arm 11 connected to the lifting cylinder 5. The impact force applied to the lifting cylinder 5 to which the machining head 6 is attached is detected. The mounting position of the impact sensor 21A may be any location where the impact caused by the press working can be sensed. It can be arranged on the lifting cylinder 5, the machining head 6, the transmission arm 11 for transmitting power thereto, and the like.

The position sensor section 22 is for detecting the machining position of the lifting cylinder 5 and accordingly the machining position of the machining head 6 . As shown in FIGS. 1A and 1B, the position sensor unit 22 includes, for example, a magnet 22A attached to the elevating cylinder 5 and a position sensor 22B (magnetic sensor) that detects the magnet 22A at a fixed position. I have. The position sensor 22B is attached to the cylinder guide 4 side, for example. The position sensor 22B is attached to the side surface of the upper end of the lifting cylinder 5 that protrudes upward from the upper end of the cylinder guide 4. When the lifting cylinder 5 descends to the machining point position WP shown in FIG. Comes within the detection range of sensor 22B. Thereby, the position of the lifting cylinder 5 is detected. That is, it is detected that the position is within a predetermined range including the machining point position WP that is out of the origin position HP.

It may not be possible to detect the position of the lifting cylinder 5 by arranging the magnet 22A at the position described above depending on the structure and processing of the foot press machine 1 . In this case, as shown in FIG. 1(C), a magnet 22A is attached to the side surface of the lower end of the lifting cylinder 5 protruding downward from the lower end of the cylinder guide 4, so that the lifting cylinder 5 is positioned as shown in FIG. 1(A). The magnet 22A is made to enter the detection area of the position sensor 22B when returning to the origin position HP shown. As a result, it is detected that the lift cylinder 5 is positioned within a predetermined range including the home position HP. In this case, as will be described later, it is possible to detect that the lift cylinder 5 is positioned within a predetermined range including the working point position WP by using the inverted signal of the binary logic signal, which is the detection signal of the position sensor 22B.

The control unit 25 of the machined number monitoring device 20 is attached to the side surface of the lower end of the support arm 3, for example, as shown in FIGS. 1(A) and 1(B). The control unit 25 includes an arithmetic processing section 30 , a shot counter 40 and an operation/output section 50 . Impact sensor 21A and position sensor 22B are each wired to control unit 25 . Based on the sensor outputs of the impact sensor 21A and the position sensor 22B, the arithmetic processing unit 30 determines whether or not press working has been performed, and generates a 1-pulse count signal CS each time press working is performed. It is supplied to the shot counter 40.

The shot counter 40 counts the number of pulses of the count signal CS to obtain the integrated value of the number of hit points in press working. The operation/output section 50 includes an impact level display section 51 and an impact level setting section 52 .

[Processing number monitoring device]
FIG. 3 is a time chart showing the movement of the machining head in the press working operation and the signal processing operation in the machining hit number monitoring device 20 that is performed along with this movement. 1 to 3, the configuration and operation of the number-of-worked-dots monitoring device 20 will be described in detail.

(movement of processing head)
First, in one press working operation, the working head 6 (elevating cylinder 5) descends from the origin position HP to the working point position WP as shown at times T1 to T6 in FIG. Return to origin position HP. That is, when press working is started (time T1 in FIG. 3), the working head 6 descends from the origin position HP (see FIG. 1A) toward the working point position WP (see FIG. 1B). . The working head 6 is lowered to the working point position WP, and the workpiece W is pressed (time T3 to T4 in FIG. 3). When the foot pedal 8 is released, the machining head 6 is pulled back from the machining point position WP to the origin position HP (time points T4 to T6 in FIG. 3).

(Impact detection of processing head by impact sensor)
As shown in FIG. 2, the impact signal obtained from the impact sensor 21A in the press working operation is supplied to the impact signal switching unit 33 after noise is removed through the noise filter 31 of the arithmetic processing unit 30, and the noise is reduced. The noise-removed impact signal GW is differentiated through the filter/differential processing unit 32 and then supplied to the impact signal switching unit 33 as a differential impact signal Gdt. FIG. 3B shows the signal waveform of the impact signal GW after noise removal, and FIG. 3C shows the signal waveform of the impact differential signal Gdt.

The impact level detected by the impact sensor 21A varies depending on the type of manual press machine, the contents of the press working, and the working method. When the detected impact level is relatively large, the impact signal GW obtained through the noise filter 31 is used, and when the impact level is relatively small, differential processing is performed to maintain the impact detection accuracy. are doing. For example, in the case of a hand press machine or the like, since the level of impact during pressing is relatively small, it is desirable to detect the impact using the signal after differential processing. A differential coefficient for differential processing can be arbitrarily set below the sampling frequency of the impact sensor 21A, so that the machining state can be captured more accurately. Also, the switching of the impact signal switching unit 33 is set in advance according to the target manual press machine. Alternatively, a changeover switch (not shown) may be arranged in the operation section of the operation/output section 50 so that switching can be set based on the detected impact level.

The impact signal GW or the impact differential signal Gdt selected by the impact signal switching section 33 is displayed on the impact level display section 51 of the operation/output section 50 . The operator can recognize the impact level display of the impact level display section 51 and can reliably grasp the impact of the press working. Further, the operator can set and input an appropriate impact level for making the impact caused by the movement of the processing head 6 undetectable from the impact level setting unit 52 of the operation/output unit 50 . Alternatively, the impact level can be set by an impact level setting unit 52 having a teaching function.

Here, the teaching function is the impact sensor output waveform (GW) shown in FIG. Waveform data combined with progress is targeted. Actual processing is performed, this waveform data is stored in the impact level setting unit 52, the impact level is set based on this waveform data, the impact sensor output value is compared in the arithmetic processing unit 30, and the deviation value is used for press processing. judgment is made.

The impact signal GW or impact differential signal Gdt selected by the impact signal switching section 33 is supplied to the comparator 34 . The comparator 34 compares the impact level (set value) GLa (GLb) set by the impact level setting unit 52 and extracts impacts greater than the set impact level. In other words, it is detected that press working has been performed. Note that the direction in which the impact was applied can also be added as a parameter for determination.

In FIG. 3B, the shock level set value for the shock signal GW is ±GLa, and the shock level set value for the shock differential signal Gdt is GLb. By setting the impact level and providing a dead zone in this way, impact other than the impact of the press working level, for example, the impact when moving the machining head 6 to the machining position (time T1 in FIG. 3), the impact during the press working operation. , and the impact when the working head 6 returns to the original position after press working (time T6 in FIG. 3).

(Position detection of processing head by position sensor)
Next, a position signal PS, which is a binary logic signal representing the vertical position of the lifting cylinder 5 (processing head 6), is obtained from the position sensor 22B. When the lift cylinder 5 is in the upper region including the origin position shown in FIG. 1A, the position signal PS is in a low level output state because the magnet 22A is out of the detection region of the position sensor 22B. be. When press working is started (time T1 in FIG. 3), the lifting cylinder 5 descends from the origin position HP toward the working point position WP in FIG. 1(B). When the magnet 22A descending together with the lifting cylinder 5 enters the detection area of the position sensor 22B (time T2 in FIG. 3), the position signal PS, which is the output of the position sensor detection process, rises to high level ((E) in FIG. 3). While the foot pedal is released and the lift cylinder 5 is being returned to the home position HP, the magnet 22A is out of the detection range of the position sensor 22B and the position signal PS falls to the low level again (time T5 in FIG. 3).

Depending on the structure of the foot press machine 1, the shape of the workpiece, and the state of press working, it may not be possible to attach the magnet 22A to the side surface of the upper end portion of the elevating cylinder 5 in some cases. In this case, as described above, the position sensor section 22 is arranged at the position shown in FIG. 1(C).

As shown in FIG. 2, the arithmetic processing section 30 takes in the position signal PS from the position sensor 22B as it is, and generates an inverted signal by inverting the logic level via the signal inverting section 35 . In the position detection signal switching section 36, either the position signal PS or its inverted signal can be selected according to the mounting position of the position sensor section 22. FIG. The switching of the position detection signal switching unit 36 is set in advance according to the target manual press. Alternatively, a changeover switch (not shown) may be arranged in the operation portion of the operation/output portion 50 so that switching can be set according to the mounting position of the position sensor 22B.

When judging the movement of the processing head 6 from the inverted signal of the position sensor 22B, the position sensor 22B is arranged at a position where the non-detection distance indicated by L(22) in FIG. 3A is obtained. As a result, a position closer to the machining point position WP can be detected, and chattering of the detection signal of the position sensor 22B and the detection signal of the impact sensor 21A that occurs during return to origin can be prevented.

As the position sensor unit 22, in addition to sensors using magnetism, such as proximity switches and magnetic materials, optical sensors that detect changes in light interception, light reception, and reflection, and sensors that detect sounds such as ultrasonic waves can be used. can be done. When position detection is performed by light, a predetermined range from the vicinity of the origin position to the origin position is determined by blocking or reflecting the light paired with the sensor light that detects the movement of the processing head 6. It is desirable to have a mechanism that can be adjusted to detect, ie, the blind distance of the position sensor signal, indicated by L(22) in FIG. 3A. In addition, the detection signal of the position sensor has a hysteresis that holds the signal even if the signal is reversed for a certain period of time after the input is input in the position sensor unit 22 or the arithmetic processing unit 30. It is possible to electrically eliminate the signal noise component caused by the fluctuation or blurring of the machining head 6 that occurs in manual machining.

(Determination processing that press working has been performed)
Next, in the arithmetic processing unit 30, the impact signal GS (FIG. 3(D)) obtained from the impact sensor output and the position signal PS (FIG. 3(E)) obtained from the position sensor output are input to the AND circuit 37. be. When the impact signal GS rises to a high level during the period ΔT in which the position signal PS is at a high level, the AND circuit 37 opens and a one-pulse count signal CS (FIG. 3(F)) of a high level is output. and supplied to the shot counter 40 .

Specifically, in press working using the foot press machine 1, while the working head 6 descends from the origin position HP toward the working point position WP (time points T1 to T3 in FIG. 3), the working head 6 is After passing through the position sensor 22B (time T2), the position signal PS, which is the detection signal thereof, is inverted (time T2 in FIG. 3, (E) in FIG. 3). When the position signal PS rises to a high level, the AND circuit 37 opens and the input of the count signal CS to the shot counter 40 becomes valid.

The impact sensor 21A produces an output corresponding to the strength of the depression at the start of machining (time T1 in FIG. 3). However, if the signal level is equal to or lower than the preset impact level setting value GLa, the level of the impact processing signal GS does not change. Also, even if an impact exceeding the impact level set value GLa is applied, the position sensor output PS is not switched to a high level (effective), so the AND circuit is closed and is not reflected in the count signal CS.

When the machining head 6 reaches the machining point position WP (time T3 in FIG. 3), the actual machining impact is detected by the impact sensor 21A and reflected in the impact processing output signal GS. At the same time, the position signal PS also rises to a high level and becomes valid, and the AND circuit 37 is opened. Therefore, it is determined that press working has been performed, and the impact processing output signal GS is reflected in the count signal CS. Notify workers of what has happened.

In the case of hand pressing or machining with little impact, there are cases where the peak value of the impact sensor 21A is low or the noise component of the impact sensor 21A is large, making it difficult to grasp the machining. In this case, by switching the impact signal switching unit 33, the absolute value (Gdt) of the value obtained by differentiating the impact sensor output can be compared with the impact level GLb to determine whether or not it is the impact of processing. can.

When the machining is finished (time T4 in FIG. 3) and the machining head 6 is lifted and returns to the origin position HP (time T6), the impact sensor 21A again senses the impact of the machining head 6 stopping at the origin position HP, It may be reflected in the impact processing output signal GS. Even if the impact is reflected in the impact processing output signal GS, the machining head 6 is at the home position HP and the position signal PS is in an invalid state of low level. Therefore, the impact detected when returning to the home position HP is not reflected in the count signal CS, thereby preventing erroneous counting.

(shot counter)
Next, the shot counter 40 counts the number of pulses of the input count signal CS, thereby accumulating the number of hit points for processing in the foot press machine 1 . The shot counter 40 includes a counting section 41 , a setting/judgment section 42 for setting the number of processed dots, the number of lots, etc., and an operation/output section 43 . The shot counter 40 can set the number of points to be machined by setting input. The number of points to be machined (SHOT), the number of lots (LOT) and the like input via the operation section of the operation/output section 43 are set in the setting/determining section 42 . When a reset signal is input via the operation section of the operation/output section 43, the counting operation of the number of processed dots is started, and the counting section 41 adds up the number of processed dots each time the count signal CS is input. The integrated value is displayed on the display of the operation/output unit 43 . When the integrated value of the number of processed dots reaches the set value of the number of processed dots, an alarm is issued from the alarm section of the operation/output section 43 to inform the operator that processing for one lot has been completed. When the operator inputs a reset signal through the operation section of the operation/output section 43, the alarm and count value are reset.

The count section 41 of the shot counter 40 sets a time width for receiving the input of the count signal CS. Even if a plurality of pulses of the count signal CS are input during the set time width (dead band), the count is set to one within the set time. Due to a mistake such as insufficient pressurization during press working, press working operations may be repeated in a short period of time when re-pressurizing is performed. It is possible to solve the problem of counting the number of machining hit points for a plurality of times due to the impact that occurs within a short period of time due to such re-strikes.

(Example of operation of processing number monitoring device)
FIG. 4 is a schematic flow chart showing the operation of the number-of-work-marks monitoring device 20 attached to the foot press machine 1. As shown in FIG. The outline of the operation will be briefly explained below according to the flow chart.

The shot counter 40 of the machined number monitoring device 20 is turned on. First, the number of points (SHOT) to be processed for the workpiece W to be pressed and the number of lots (LOT) of the workpiece W to be processed are set (step ST1), and if necessary, the impact signal processing switching setting and position detection are performed. Configure signal switching settings. Further, detection by the impact sensor section 21 and the position sensor section 22 is started, and the impact level determination value by the comparator 34 is set via the impact level setting section 52 (step ST21). Each time press working is performed, a count beep sound is generated in the arithmetic processing unit 30 and a count signal CS (1 pulse) is output to the shot counter 40 based on the output of the position sensor and the output of the impact sensor (step ST22 to ST25).

The shot counter 40 counts up the number of machining points based on the input count signal CS (step ST2: SHOT count), compares the integrated value with the set machining points (step ST3: SHOT count comparison), and the integrated value is When the set number of points for machining is reached, a warning sound is generated to notify the operator (step ST4). When the operator performs a reset input (step ST5), this is detected (step ST6) and the number of lots is counted up (step ST7). Thereafter, the integrated value of the number of processed dots is reset (step ST8), and it is determined whether or not the number of lots has reached the set number of lots. (Steps ST9, 10). When the operator makes a reset input, this is detected, the alarm sound is stopped, the counted number of lots is reset, and the process ends (steps ST11, 12, 13).

(Effect)
As mentioned earlier, the current state of press work using a manual press machine is that the worker on the site checks the drawing, memorizes the designated processing locations and numbers, and then places the designated number in the necessary locations. After machining, the inspection process checks for excess or deficiency in the number of dots, a double check to prevent excess or deficiency in the number of processed dots. By using the processing number monitoring device 20 according to the present invention, it is possible to sense the required number of press processing of the product and notify the worker of the completion of the work (completion of processing) by warning sound and lighting or blinking of the light. is. In addition, a double-check system can be established in the work site by recognizing the worker and monitoring the number of machining points by the apparatus and method of the present invention.

In addition, regardless of the size of the lot number, there is a possibility that human errors such as forgetting to process or overlooking inspection may occur. , it is possible to prevent the excess or deficiency of the number of points to be processed, and to prevent the outflow of defective products to the next process. Furthermore, by monitoring the number of points to be machined by the apparatus and method of the present invention, the operator can concentrate only on the machining work, thereby reducing the burden on the operator.

1 Foot press machine 2 Press machine stand 3 Support arm 4 Cylinder guide 5 Elevating cylinder 6 Machining head 8 Treadle pedal 8A Standby position 8B Positions 9, 10, 11 Transmission arm 20 Machining number monitoring device 21 Impact sensor section 21A Impact sensor 22 Position sensor section 22A Magnet 22B Position sensor 25 Control unit 30 Operation processing section 31 Noise filter 32 Noise filter/differentiation processing section 33 Impact signal switching section 34 Comparator 35 Signal inverting section 36 Position detection signal switching section 37 AND circuit 40 Shot counter 41 Count Unit 42 Setting/judgment unit 43 Operation/output unit 50 Operation/output unit 51 Impact level display unit 52 Impact level setting unit HP Origin position WP Processing point position PS Position signal GS Impact processing output signal CS Count signal

Claims (9)

A processing number monitoring device for monitoring the number of processing points in a press operation using a manual press having a processing head capable of reciprocating between an origin position and a processing point position,
an impact sensor that detects an impact force acting on the processing head;
a position sensor that detects the position of the processing head;
an arithmetic processing unit that determines whether or not press working has been performed by the working head based on the detected impact force and the position;
A processing number monitoring device for a manual press, comprising: In claim 1,
The arithmetic processing unit is configured such that, while the machining head is positioned within a set range including the machining point position other than the origin position, the impact force or a time differential value of the impact force is equal to or greater than a set value. In the case of (1), a processing hitting number monitoring device for a human-powered press for determining that the press processing has been performed once by the processing head. In claim 2,
An apparatus for monitoring the number of hit points for a manual press machine, which has a shot counter for accumulating the number of hit points of the press working based on the determination of the press work by the arithmetic processing unit. In claim 3,
The shot counter determines that the press working determination has occurred once within the time width when the press working determination occurs a plurality of times within a preset time width, and the pressing operation is performed. A device for monitoring the number of processed points of a manual press that accumulates points. In any one of claims 2 to 4,
The arithmetic processing unit is
a differential processing unit that calculates the time differential value from the impact force detected by the impact sensor;
an impact signal processing switching unit that switches between the impact force and the time differential value to be used;
an impact determination unit that compares the impact force or the time differential value selected by the impact signal processing switching unit with the set value;
A device for monitoring the number of processing points for a manual press machine. In claim 5,
an impact level display unit for displaying the impact force or the time differential value selected by the impact signal processing switching unit;
an impact level setting unit that sets the set value;
A monitoring device for the number of processing hits of a manual press machine. In any one of claims 2 to 6,
The position sensor provides the arithmetic processing unit with a first logic signal indicating that the machining head is at a position within the set range, or at a position outside the set range including the origin position. to input a second logic signal indicating
The arithmetic processing unit is
a signal inverter that generates an inverted signal of the second logic signal;
a position detection signal processing switching unit for switching which of the first logic signal and the inverted signal is used for the press working determination;
A device for monitoring the number of processing points for a manual press machine. In claim 7,
The arithmetic processing unit is
a differential processing unit that calculates the time differential value from the impact force detected by the impact sensor;
an impact signal processing switching unit that switches between the impact force and the time differential value to be used;
an impact determination unit that compares the impact force or the time differential value selected by the impact signal processing switching unit with the set value;
a determination circuit that performs the press work determination based on the position signal selected by the position detection signal processing switching unit and the determination output of the impact determination unit;
and
a shock level display section for displaying the shock force or the time differential value selected by the shock signal processing switching section;
an impact level setting unit that sets the set value;
a shot counter for accumulating the number of hit points of the press work based on the press work determination by the arithmetic processing unit;
A monitoring device for the number of processing hits of a manual press machine. A processing hit for monitoring the number of processing hits in a press operation using a manual press having a processing head that can reciprocate between the origin position and the processing point position, using the processing hit number monitoring device according to claim 8. A score monitoring method comprising:
The impact sensor is externally attached to a portion of the manual press that can detect the impact force acting on the processing head, and the impact force acting on the processing head is detected,
The position sensor is externally attached to a portion of the manual press that can detect that the working head is positioned within a set range including the working point position other than the origin position, and the working head Detect the position of
The arithmetic processing unit, the shot counter, and the impact level display unit are externally attached to the manual press machine, or installed at a position separate from the manual press machine,
A working punch of a manual press, characterized in that a worker who performs pressing work can visually check the impact level display section and the display section of the shot counter to check the level of the impact force and the number of punched points. Score monitoring method.

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