Stamping die wedge position monitoring system and monitoring method

Abstract

The invention relates to the technical field of stamping forming, in particular to a system and method for monitoring the position of a wedge of a stamping die. The monitoring system comprises a laser displacement sensor and a controller, and the laser displacement sensor is used for monitoring position information of the filling male die in real time and sending the position information to the controller. And the controller judges whether the position of the filling male die exceeds an allowable range or not according to the position information of the filling male die corresponding to each stroke bottom dead center and the pre-defined standard position and allowable fluctuation range of the filling male die corresponding to each stroke bottom dead center, and sends a guide plate abrasion alarm instruction if the position of the filling male die exceeds the allowable range. The laser displacement sensor and the controller are used for monitoring the position of the filling male die in real time, the change trend of the position of the filling male die is observed in time, an alarm is given out when the position exceeds the set range, and a worker disassembles and checks the die in time, finds out the abrasion position and repairs the die.

Description

Technical Field

[0001] The invention relates to the technical field of stamping and forming, and in particular to a stamping die wedge position monitoring system and a monitoring method. Background Art

[0002] In the flanging process of automobile stamping covering parts such as side panels, door outer panels, front cover outer panels, rear cover outer panels, fenders, top covers and other parts, due to the acute angle of the flange flanging in the product design, it is necessary to use a wedge mechanism to achieve side flanging in order to achieve the specific angle required by the product design.

[0003] like Figure 1 , Figure 2 As shown, the corresponding inclined wedge mechanism, usually the upper die part is called the hanging wedge 100, and the lower die part is called the filling punch 200. In a stamping cycle, the working order is: placing the part → the lower die filling punch is ejected into place → the upper die moves downward to drive the upper die hanging wedge to work → the upper die moves upward → the lower die filling punch retreats → taking the part out.

[0004] The filling punch 200 is the benchmark for part forming, and the working part of the filling punch 200 has the same shape as the product. In order to control the movement of the filling punch 200, it needs to be driven by the cylinder 500, the pulley mechanism 400, etc., and there is a guide plate 300 between the parts. There is relative sliding between the guide plates, and long-term work causes the wear of the guide plate 300. The wear of the guide plate 300 causes the position of the filling punch 200 to change. When the wear accumulates beyond a certain amount, the filling punch 200 is in the wrong position after it is in place, and then the size or surface quality defects occur during the stamping of the part.

[0005] At present, the inspection of the guide plate 300 must be done by disassembling the mold and measuring with a vernier caliper. The process is complicated, wastes manpower, takes a long time, and has low accuracy. Generally, it takes about 8 hours to disassemble, measure, and assemble the mold, and it is completed by 2 people. Therefore, inspections are often performed only once every few months. During this period, the parts may have defects due to the wear of the guide plate, and the real cause cannot be determined.

[0006] In view of the above problems, the inventors of the present invention finally obtained the present invention after a long period of research and practice. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a stamping die wedge position monitoring system and monitoring method, which can realize real-time monitoring of the filling punch position. There is no need to monitor the guide plate at ordinary times, and the guide plate can be checked only when the monitoring system alarms.

[0008] The technical solution adopted by the present invention is:

[0009] On the one hand, a stamping die wedge position monitoring system is provided, comprising a laser displacement sensor and a controller, wherein the controller is electrically or communicatively connected to the laser displacement sensor and the press respectively;

[0010] The laser displacement sensor is used to monitor the position information of the filling punch in real time and send the position information to the controller;

[0011] The controller determines whether the position of the filling punch exceeds the allowable range based on the position information of the filling punch corresponding to the bottom dead point of each stroke, as well as the pre-defined standard position and allowable fluctuation range of the filling punch corresponding to the bottom dead point of each stroke, and issues a guide plate wear alarm instruction if it exceeds the range.

[0012] Furthermore, the laser displacement sensor is at least one group, each group includes a movement direction laser displacement sensor and a support direction laser displacement sensor; the movement direction laser displacement sensor is arranged on the extension side of the movement direction of the filling punch, and the support direction laser displacement sensor is arranged on the outer side of the support surface of the filling punch.

[0013] Furthermore, the controller is also used to collect the corresponding relationship between the real-time position of the filling punch and the stamping time, the press stroke or the press spindle cam angle.

[0014] On the other hand, a method for monitoring the position of a wedge of a stamping die is provided, which adopts the above monitoring system and comprises the following steps:

[0015] Step 1: Arrange the laser displacement sensor according to the mold structure to monitor the position of the filling punch in real time;

[0016] Step 2: The controller receives the filling punch position information collected by the laser sensor in real time;

[0017] Step 3: The controller predefines the standard position and allowable fluctuation range of the filling punch corresponding to the bottom dead point of each stroke;

[0018] Step 4: The controller compares the received position information of the filling punch corresponding to the bottom dead point of each stroke with the corresponding pre-defined standard position and allowable fluctuation range of the filling punch. If the position of the filling punch exceeds the allowable range, a guide plate wear alarm instruction is issued;

[0019] Step 5: After receiving the alarm message, the staff will disassemble and inspect the mold, find the worn position of the guide plate and repair it.

[0020] Furthermore, in step one, the laser displacement sensors are arranged in groups, and each group of laser displacement sensors includes a movement direction laser displacement sensor and a support direction laser displacement sensor, and the laser irradiation directions are respectively along the movement direction of the filling punch and the support direction of the filling punch; one or more groups of laser displacement sensors can be arranged according to the size of the filling punch.

[0021] Furthermore, the controller adopts PLC or microcomputer.

[0022] Furthermore, in the step 2, the controller counts the corresponding relationship between the real-time position of the filling punch and the stamping time, the press stroke or the press spindle cam angle, so that the staff can observe the changing trend of the filling punch position and the guide plate wear.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] The present invention utilizes a laser displacement sensor and a controller to monitor the position of the filling punch in real time, timely observes the changing trend of the filling punch position, and issues an alarm when it exceeds a set range. The staff promptly disassembles and inspects the mold, finds the worn position, and repairs it. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 The overall structural diagram of the wedge mechanism of the stamping die is shown;

[0027] Figure 2 The exploded structural diagram of the wedge mechanism of the stamping die is shown;

[0028] Figure 3 A schematic diagram showing the arrangement of sensors of a monitoring system according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0029] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0030] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". Other explicit and implicit definitions may also be included below.

[0031] like Figure 3 As shown, in this embodiment, the driving wedge 600 of the wedge mechanism of the stamping die moves up and down, and a guide plate 300 for relative movement is provided between the filling punch 200 and the driving wedge 600. The bottom surface of the filling punch 200 is slidably supported on a guide plate 300. During operation, the driving wedge 600 moves downward, pushing the filling punch 200 to move horizontally to the left. The stamping die wedge position monitoring system includes a laser displacement sensor 1 and a controller (not shown in the figure). The controller is electrically or communicatively connected to the laser displacement sensor 1 and the press, respectively. According to the mold structure, the position information of the filling punch 200 is monitored in real time by arranging the laser displacement sensor 1. The controller collects the position information of the bottom dead point of each stroke of the filling punch 200, and the range is set by the user in the system, and an alarm is issued when the range is exceeded.

[0032] Specifically, the laser displacement sensor 1 is used to monitor the position information of the filling punch 200 in real time and send the position information to the controller. The controller determines whether the position of the filling punch 200 exceeds the allowable range based on the position information of the filling punch 200 corresponding to the bottom dead point of each stroke, and the pre-defined standard position and allowable fluctuation range of the filling punch corresponding to the bottom dead point of each stroke, and issues a guide plate wear alarm instruction if it exceeds the range.

[0033] In some embodiments, according to the mold structure, the laser displacement sensor 1 is preferably arranged in the moving direction of the filling punch and the supporting direction of the filling punch, and one or more groups can be arranged according to the size of the filling punch. Specifically, the laser displacement sensor 1 is at least one group, and each group includes a moving direction laser displacement sensor 11 and a supporting direction laser displacement sensor 12. The moving direction laser displacement sensor 11 is arranged on the extended side of the moving direction of the filling punch 200, and the supporting direction laser displacement sensor 12 is arranged on the outer side of the supporting surface of the filling punch 200.

[0034] The controller is also used to collect the corresponding relationship between the real-time position of the filling punch and the stamping time, the press stroke or the press spindle cam angle, and timely observe the changing trend of the filling punch position.

[0035] According to another aspect of the present invention, a method for monitoring the position of a wedge of a stamping die is provided, which adopts the above-mentioned monitoring system and comprises the following steps:

[0036] 1. Arrange laser displacement sensors according to the mold structure to monitor the position of the filling punch in real time. The laser displacement sensors are arranged in groups, and each group of laser displacement sensors includes a moving direction laser displacement sensor and a supporting direction laser displacement sensor. The laser irradiation direction is along the moving direction of the filling punch and the supporting direction of the filling punch respectively; one or more groups of laser displacement sensors can be arranged according to the size of the filling punch.

[0037] 2. The controller receives the filling punch position information collected by the laser sensor in real time. The controller adopts PLC or microcomputer, and the PLC or microcomputer counts the corresponding relationship between the real-time position of the filling punch and the stamping time, the press stroke or the press spindle cam angle.

[0038] 3. The controller pre-defines the standard position and allowable fluctuation range of the filling punch corresponding to the bottom dead point of each stroke.

[0039] 4. The controller compares the position information of the filling punch corresponding to the bottom dead point of each stroke received with the corresponding pre-defined standard position and allowable fluctuation range of the filling punch. If the position of the filling punch exceeds the allowable range, a guide plate wear alarm instruction is issued.

[0040] 5. After receiving the alarm information, the staff will disassemble and inspect the mold, find the worn position of the guide plate and repair it.

[0041] The present invention collects data information collected by the laser sensor through a PLC or a microcomputer to achieve two functions. First, the position of the filling punch is collected in real time, and a corresponding relationship is formed with time, press stroke or press spindle cam angle. Second, the position information of the bottom dead point of each stroke is collected, and the user sets the range in the system, and an alarm prompt is issued when the range is exceeded.

[0042] The above are only preferred embodiments of the present invention, which are only illustrative and not restrictive. The structures and connection modes of the components in the present invention can be changed, and any equivalent transformations and improvements based on the technical solution of the present invention should not be excluded from the protection scope of the present invention.

Claims

1. A stamping die wedge position monitoring system, characterized in that: It includes a laser displacement sensor and a controller, wherein the controller is electrically or communicatively connected to the laser displacement sensor and the press respectively; The laser displacement sensor is used to monitor the position information of the filling punch in real time and send the position information to the controller; The controller determines whether the position of the filling punch exceeds the allowable range based on the position information of the filling punch corresponding to the bottom dead point of each stroke, as well as the pre-defined standard position and allowable fluctuation range of the filling punch corresponding to the bottom dead point of each stroke, and issues a guide plate wear alarm instruction if it exceeds the range.

2. A stamping die wedge position monitoring system according to claim 1, characterized in that: The laser displacement sensors are at least one group, each group includes a moving direction laser displacement sensor and a supporting direction laser displacement sensor; the moving direction laser displacement sensor is arranged on the extension side of the moving direction of the filling punch, and the supporting direction laser displacement sensor is arranged on the outer side of the supporting surface of the filling punch.

3. A stamping die wedge position monitoring system as claimed in claim 1 or 2, characterized in that: The controller is also used to collect the corresponding relationship between the real-time position of the filling punch and the punching time, the press stroke or the press spindle cam angle.

4. A method for monitoring the position of a stamping die wedge, characterized in that: The monitoring system as claimed in claim 3 comprises the following steps: Step 1: Arrange the laser displacement sensor according to the mold structure to monitor the position of the filling punch in real time; Step 2: The controller receives the filling punch position information collected by the laser sensor in real time; Step 3: The controller predefines the standard position and allowable fluctuation range of the filling punch corresponding to the bottom dead point of each stroke; Step 4: The controller compares the received position information of the filling punch corresponding to the bottom dead point of each stroke with the corresponding pre-defined standard position and allowable fluctuation range of the filling punch. If the position of the filling punch exceeds the allowable range, a guide plate wear alarm instruction is issued; Step 5: After receiving the alarm message, the staff will disassemble and inspect the mold, find the worn position of the guide plate and repair it.

5. A method for monitoring the position of a stamping die wedge according to claim 4, characterized in that: In step one, the laser displacement sensors are arranged in groups, each group of laser displacement sensors includes a movement direction laser displacement sensor and a support direction laser displacement sensor, and the laser irradiation directions are respectively along the movement direction of the filling punch and the support direction of the filling punch; one or more groups of laser displacement sensors can be arranged according to the size of the filling punch.

6. A method for monitoring the position of a stamping die wedge according to claim 4, characterized in that: The controller adopts PLC or microcomputer.

7. A method for monitoring the position of a stamping die wedge according to claim 4, characterized in that: In the step 2, the controller counts the corresponding relationship between the real-time position of the filling punch and the stamping time, the press stroke or the press spindle cam angle, so that the staff can observe the changing trend of the filling punch position and the guide plate wear.

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