Stamping drawing piece detection device

Abstract

The utility model relates to the technical field of stamping part detection, in particular to a stamping drawing part detection device. Comprising a PLC, a size measuring mechanism, a driving mechanism and a data acquisition terminal, the size measuring mechanism and the driving mechanism are both installed on a lower die of the trimming die, and the output end of the driving mechanism is connected with the size measuring mechanism; the PLC is respectively connected with the driving mechanism and the data acquisition terminal; and the data acquisition terminal is in communication connection with the size measurement mechanism. The size measuring mechanism is matched with the PLC and the driving mechanism, the distance value L from the initial reference position L0 of the edge of the blank to the edge of the blank is rapidly measured, the size output detected by the size detecting mechanism is automatically stored in the data acquisition terminal, and a worker can conveniently check the size; the whole device is simple in structure, low in cost, capable of rapidly and effectively detecting whether the drawing part cracks or wrinkles or not, high in efficiency and high in accuracy.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of stamping part detection, more particularly to a stamping drawing part detection device. BACKGROUND

[0002] In the drawing forming process of stamping parts, quality problems such as cracking, wrinkling and deformation are prone to occur, and the quality problems of stamping parts can lead to serious consequences such as water leakage and complaint claims. The influencing factors that cause the quality problems of drawing usually include: production parameter setting (for example: press tonnage, air cushion pressure), press precision, die clamping state, material properties, automatic part placing state, etc. If the cracking, wrinkling and deformation of stamping parts are solved from the source, it often requires a lot of investment to cause cost increase. Therefore, in the case where the source is difficult to solve completely, it is necessary to strengthen the outflow inspection to avoid the outflow of defective products and produce serious consequences. Monitoring the blank flow rate of stamping parts during drawing forming can infer the quality of stamping parts; when the flow rate is too large and too fast (the flow rate is large, resulting in that the outer excess material of the rib is less than the experience range), it can be inferred that the part is wrinkled; when the flow rate fluctuates within a certain range (the outer excess material of the rib is within the experience range), it can be inferred that the part quality is qualified; when the flow rate is too small and too slow (the flow rate is small, resulting in that the outer excess material of the rib is greater than the experience range), it can be inferred that the part is cracked.

[0003] At present, the industry mainly uses the way of camera shooting to compare and analyze the pictures to give the excess material size of the blank periphery. According to the actual application situation, the measurement result of this way is very inaccurate, and false alarms are often formed to waste production time. Moreover, at present, the price of these devices is high, and one set of system needs 4-6 cameras, the calculation amount is large, the picture processing time is long, and the hardware requirements for cameras and processors are also high. The investment and cost are very high, and the whole system is about 3 million yuan or more, and it also needs outsourcing maintenance. The above-mentioned visual recognition system of "camera shooting + image comparison" has high requirements for the light in the field, in order to ensure the accuracy of the result, it needs to be shot from multiple angles and compared with the collected image data for analysis to simulate the calculation of the distance value. Therefore, the measurement result is often inaccurate, and there is a high probability of false alarm, which wastes the working hours of the production line and the field personnel. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the insufficient of high detection cost and low accuracy rate in prior art, and provides a stamping drawing part detection device, which effectively reduces the cost and has high detection efficiency and high accuracy.

[0005] To solve the above technical problems, the utility model adopts the technical scheme of:

[0006] Provided is a stamping and drawing part detection device, comprising a PLC controller, a size measuring mechanism, a driving mechanism and a data acquisition terminal; the size measuring mechanism and the driving mechanism are both mounted on a lower die of a trimming die, the output end of the driving mechanism is connected with the size measuring mechanism; the PLC controller is connected with the driving mechanism and the data acquisition terminal respectively; the data acquisition terminal is in communication connection with the size measuring mechanism.

[0007] The stamping and drawing part detection device of the utility model, based on trimming die, to the device of on-line detection of drawing part, detection device is installed on the lower die support of trimming process, is located in the position of drawing part easy to crack or easy to wrinkle. Monitoring the blank flow amount of the stamping part during drawing forming, that is, detecting the distance value L from the initial reference position L0 of the blank edge to the blank edge, the quality of the stamping part can be inferred, when L-L0 is greater than 3mm, the blank flow amount is too large and too fast, and wrinkles are prone to occur; when L-L0 is between 0-3mm, the blank flow amount is not prone to defects; when L-L0 is less than 0, the blank flow amount is too small and too slow, and cracking is prone to occur. The utility model realizes the rapid measurement of the distance value L from the initial reference position L0 of the blank edge to the blank edge by the size measuring mechanism cooperating with the PLC controller and the driving mechanism, the size output detected by the size detection mechanism is automatically stored in the data acquisition terminal, which is convenient for staff to check; the whole device has simple structure and low cost, and can quickly and effectively detect whether the drawing part cracks or wrinkles, has high efficiency and high accuracy.

[0008] Further, the size measuring mechanism and the driving mechanism are both provided with multiple, multiple size measuring mechanisms and driving mechanisms are both installed on the lower die; each size measuring mechanism is connected with the output end of one driving mechanism; multiple driving mechanisms are respectively connected with the PLC controller; multiple size measuring mechanisms are connected with the data acquisition terminal. The edge of the blank is arranged and set in the direction opposite to the material flow, which is set around the drawing part; by setting multiple monitoring devices around the drawing part, the quality monitoring of the whole part can be realized.

[0009] Further, the size measuring mechanism comprises a first mounting plate, a digital micrometer and a sensing feeler, the digital micrometer is installed on the first mounting plate, the sensing feeler is installed on the first mounting plate, and the feeler end of the sensing feeler is located at the measuring end of the digital micrometer; the output end of the driving mechanism is connected with the first mounting plate; the digital micrometer is in communication connection with the data acquisition terminal. The digital micrometer is used for measuring distance, and the sensing feeler is used for sensing whether the digital micrometer contacts the edge of the drawing part, so as to ensure the accuracy of detection.

[0010] Further, the size measuring mechanism further comprises a spring-loaded pin, one end of the spring-loaded pin is connected with the sensing feeler. The spring-loaded pin is elastic and connected with the sensing feeler, so that the sensing feeler can be prevented from being damaged when contacting the drawn part.

[0011] Further, the sensing feeler has an L-shaped structure, one end of the sensing feeler is a connecting end, and the other end of the sensing feeler is a feeler end; the spring-loaded pin comprises a pin, a spring and a connecting block; one end of the pin is fixedly installed on the first mounting plate and is arranged in parallel with the digital micrometer; the connecting block is slidably installed on the other end of the pin; the spring is sleeved on the pin and located between the connecting block and the first mounting plate; the connecting end of the sensing feeler is connected with the connecting block, and the feeler end of the sensing feeler is located in front of the measuring end of the digital micrometer. The feeler end is located in front of the digital micrometer, and when the feeler end contacts the drawn part, the drawn part is pushed by the pushing force of the cylinder, and the sensing feeler rebounds slightly due to the action of the spring-loaded pin, so that the drawn part is prevented from being damaged, and the precision of the digital micrometer is prevented from being affected by the direct contact between the digital micrometer and the drawn part.

[0012] Further, the driving mechanism comprises a cylinder and an electromagnetic valve; the output end of the cylinder is connected with the size measuring mechanism, the electromagnetic valve is installed on the input and output pipelines of the cylinder, and the electromagnetic valve is electrically connected with the PLC controller. The PLC controller is connected with the electromagnetic valve, the opening and closing of the electromagnetic valve is controlled, and thus the extension or retraction of the cylinder is controlled.

[0013] Further, a position sensor is further provided, the position sensor is installed on the lower die, and the position sensor is in communication connection with the PLC controller. The position sensor is used for detecting whether the drawn part has been placed on the lower die of the trimming die, and feeding back a detection signal to the PLC controller, and the PLC controller controls the driving mechanism to start detection.

[0014] Further, a mounting frame is further provided, the mounting frame is installed at a predetermined position around the lower die, and the driving mechanism is installed on the mounting frame. The mounting frame is installed around the lower die of the trimming die, the size measuring mechanism can better measure the distance value through the mounting frame, and the mounting frame provides an installation position for the size measuring mechanism and the driving mechanism. The installation height of the size measuring mechanism can be adjusted through the mounting frame, so that the size measuring mechanism can be more accurately measured.

[0015] Further, the installation height of the size measuring mechanism is the same as the height of the edge of the drawn part to be measured.

[0016] Further, the data acquisition terminal comprises a computer, a mobile phone or a tablet. The size measuring mechanism is a digital micrometer, the data acquisition terminal is directly connected with the digital micrometer in communication, and the measured size value is directly stored in the data acquisition terminal, so that the staff can check and judge.

[0017] Compared with the prior art, the stamping and drawing part detection device has the advantages that:

[0018] The stamping and drawing part detection device has the advantages that: the size measuring mechanism cooperates with the PLC controller and the driving mechanism to realize rapid measurement of the distance value L from the initial reference position L0 of the blank edge to the blank edge, the size output detected by the size detecting mechanism is automatically stored in the data acquisition terminal, and the staff can check; the whole device has a simple structure, low cost, and can quickly and effectively detect whether the drawing part is cracked or wrinkled, has high efficiency and high accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a first state structure schematic diagram of the stamping and drawing part detection device.

[0020] Figure 2 It is a second state structure schematic diagram of the stamping and drawing part detection device.

[0021] Figure 3 It is a structure schematic diagram before the upper die of the trimming die is pressed down.

[0022] Figure 4 It is a structure schematic diagram after the upper die of the trimming die is pressed down.

[0023] Figure 5 It is a principle schematic diagram of the utility model.

[0024] In the drawings: 1, PLC controller; 2, data acquisition terminal; 3, first mounting plate; 4, digital micrometer; 5, sensing feeler; 6, pop-up pin; 7, air cylinder; 8, electromagnetic valve; 9, in-place inductor; 10, mounting frame; 11, lower die; 12, drawing part; 13, upper die. DETAILED DESCRIPTION

[0025] The utility model will be further described in connection with specific implementation. Among them, the drawings are only used for example description, and the representation is only a schematic diagram, and not a physical drawing, and can not be understood as the limitation of the patent; in order to better illustrate the embodiment of the utility model, some components of the drawings can be omitted, enlarged or reduced, and do not represent the size of actual product; for those skilled in the art, it can be understood that some known structures in the drawings and their description can be omitted.

[0026] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and so on indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] Example 1

[0028] like Figures 1 to 4 As shown, this embodiment is a first embodiment of a stamping and drawing part 12 detection device, including a PLC controller 1, a dimension measuring mechanism, a driving mechanism and a data acquisition terminal 2; the dimension measuring mechanism and the driving mechanism are both installed on the lower die 11 of the trimming die, and the output end of the driving mechanism is connected to the dimension measuring mechanism; the PLC controller 1 is respectively connected to the driving mechanism and the data acquisition terminal 2; the data acquisition terminal 2 is communicatively connected to the dimension measuring mechanism.

[0029] like Figure 3 and Figure 4 As shown, multiple dimensional measurement mechanisms and drive mechanisms are provided, each installed at intervals on the lower die 11; each dimensional measurement mechanism is connected to the output terminal of a drive mechanism; the multiple drive mechanisms are respectively connected to the PLC controller 1; and the multiple dimensional measurement mechanisms are connected to the data acquisition terminal 2. The arrangement is performed in a direction opposite to the direction of material flow, extending to the edge of the blank. By setting multiple monitoring devices around the drawn part 12, the quality of the entire part can be monitored.

[0030] like Figure 1 and Figure 2As shown in the figure, the size measuring mechanism comprises a first mounting plate 3, a digital micrometer 4 mounted on the first mounting plate 3, and a sensing feeler 5 mounted on the first mounting plate 3 with the feeler end of the sensing feeler 5 located at the measuring end of the digital micrometer 4; the output end of the driving mechanism is connected with the first mounting plate 3; and the digital micrometer 4 is in communication connection with the data acquisition terminal 2. The digital micrometer 4 is used for measuring distance, and the sensing feeler 5 is used for sensing whether the digital micrometer 4 is in contact with the edge of the drawn part 12 to ensure the accuracy of detection. Since the thickness of the punched part is only 0.5-0.7mm, the width of the measurement target is only about 0.6mm in relative measurement, and the position of the measurement target is not fixed due to the vibration of the machine tool and the springback of the part. Since the cross-sectional thickness of the measurement target is very small and the position fluctuates, the current laser measuring device cannot meet the requirements. The measuring device needs to have a feeler to ensure that the edge of the blank can be detected with high accuracy in the state of up and down movement.

[0031] As shown in the figure, Figure 1 and Figure 2 As shown in the figure, the driving mechanism comprises a pneumatic cylinder 7 and a solenoid valve 8; the output end of the pneumatic cylinder 7 is connected with the size measuring mechanism, the solenoid valve 8 is mounted on the input and output pipelines of the pneumatic cylinder 7, and the solenoid valve 8 is in electrical connection with the PLC controller 1. The PLC controller 1 is connected with the solenoid valve 8 to control the opening and closing of the solenoid valve 8, thereby controlling the extension or retraction of the pneumatic cylinder 7.

[0032] As shown in the figure, Figures 1 to 4 It further comprises a position sensor 9 mounted on the lower die 11, and the position sensor 9 is in communication connection with the PLC controller 1. The position sensor 9 is used for detecting whether the drawn part 12 has been placed on the lower die 11 of the trimming die, and feeding back the detection signal to the PLC controller 1, and the PLC controller 1 controls the driving mechanism to start detection.

[0033] The installation height of the size measuring mechanism is the same as the height of the edge of the drawn part 12 to be measured.

[0034] In this embodiment, the data acquisition terminal 2 comprises a computer, a mobile phone or a tablet computer.

[0035] The utility model discloses a stamping draw piece 12 detection device, based on the trimming die, the device of on -line detection to draw piece 12, detection device is installed in the trimming process lower mould 11 support, is located draw piece 12 easy cracking or easy wrinkle position. The blank flow amount when draw forming of monitoring stamping piece, that is, the distance value L of detecting blank edge initial reference position L0 to blank edge, can conjecture the quality of stamping piece, when L-L0 is greater than 3mm, the blank flow amount of specification is too big too fast, and easy to appear wrinkle, when L-L0 is between 0-3mm, then blank flow amount formula, not easy to appear defect, when L-L0 is less than 0, then explain blank flow amount too small too slow, and easy to appear cracking. The utility model discloses a size measuring mechanism cooperation PLC controller 1 and drive mechanism, realize the distance value L of quick measurement blank edge initial reference position L0 to blank edge, and the size output of size detection mechanism detected is automatically stored in data acquisition terminal 2, and staff is convenient to check, whole device structure is simple, and the cost is low, and can fast and effective detection draw piece 12 whether appear cracking or wrinkle, and the efficiency is high, and the accuracy is high.

[0036] Working principle:

[0037] As Figure 5 The utility model discloses a detection principle schematic drawing. The utility model judges whether draw piece 12 meets the requirement by measuring the distance value of draw piece 12 edge distance blank edge initial position, when draw piece 12 edge distance initial position is between 0~3mm, then show that draw piece 12 is normal, when draw piece 12 edge distance initial position is less than 0, then show that cracking appears, when draw piece 12 edge distance initial position is greater than 3mm, then show that wrinkle appears.

[0038] Because the production tempo of stamping draw piece 12 is about 6-7 seconds, and the cycle time is very short, therefore need to complete measurement in short time, to be able to not delay draw piece 12 normal production. When measuring, utilize carrying robot to place draw piece 12 in trimming lower mould 11, when trimming lower mould 11 is pressed down before this time (about 2.5 seconds), carry out interval measurement.

[0039] Work flow: draw part 12 put into the lower die 11 of trimming die → 2. In-place inductor 9 sends in-place signal to PLC controller 1 → 3. PLC controller 1 sends control signal and starts timer at the same time → 4. Solenoid valve 8 receives PLC signal to turn on the air source of cylinder 7 extension end → 5. The movable shaft of cylinder 7 extends to push the size measuring mechanism to move to the edge of the blank → 6. The pop-up pin 6 extends until the head sensing probe 5 touches the edge of the draw part 12 and stops → 7. The timer in PLC controller 1 notifies the digital micrometer 4 to send measurement data to the computer at 0.5 seconds → 8. The timer in PLC controller 1 notifies the solenoid valve to switch the valve at 0.7 seconds → 9. The solenoid valve turns on the air source of the retraction end of cylinder 7 → 10. The movable shaft of cylinder 7 retracts → 11. The pop-up pin 6 and the digital micrometer 4 retract to the reset position → 12. The upper die 13 of the trimming process is pressed down, and the waste is cut off.

[0040] Embodiment two

[0041] The second embodiment of the stamping draw part detection device is similar to the first embodiment, and the difference is that the size measuring mechanism further comprises a pop-up pin 6, which is installed on the first mounting plate 3, and one end of the pop-up pin 6 is connected with the sensing probe 5. The pop-up pin 6 is elastic and connected with the sensing probe 5, which can avoid the sensing probe 5 from being damaged when it contacts the draw part 12.

[0042] The sensing probe 5 is L-shaped, with one end being a connecting end and the other end being a probe end. The pop-up pin 6 includes a pin, a spring, and a connecting block. One end of the pin is fixedly installed on the first mounting plate 3 and is arranged in parallel with the digital micrometer 4. The connecting block is slidably installed on the other end of the pin. The spring is sleeved on the pin and located between the connecting block and the first mounting plate 3. The connecting end of the sensing probe 5 is connected with the connecting block, and the probe end of the sensing probe 5 is located directly in front of the measurement end of the digital micrometer 4. The probe end is located directly in front of the digital micrometer 4. When the probe end contacts the draw part 12, due to the pushing force of the cylinder 7, it will have a certain pushing force on the draw part 12. Due to the action of the pop-up pin 6, the sensing probe 5 rebounds slightly, which on the one hand avoids damaging the draw part 12, and on the other hand also avoids directly contacting the draw part 12 with the digital micrometer 4 to affect the precision of the digital micrometer 4.

[0043] Embodiment three

[0044] The second embodiment of the punch-drawing part 12 detection device is similar to the first embodiment, but the difference is that the mounting frame 10 is installed on the periphery of the lower die 11 at a predetermined position, and the driving mechanism is installed on the mounting frame 10. The mounting frame 10 is installed on the periphery of the trimming die lower die 11, and the size measuring mechanism can better measure the distance value through the mounting frame 10, and the size measuring mechanism and the driving mechanism are provided with mounting positions. The mounting height of the size measuring mechanism can be adjusted through the mounting frame 10, so that the size measuring mechanism can measure more accurately.

[0045] In the specific content of the above specific embodiments, any technically feasible combination of technical features can be combined, and for the sake of brevity, not all possible combinations of the above technical features are described, but as long as the combination of technical features does not exist, it should be considered within the scope of the present application.

[0046] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, other different forms of changes or modifications can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A press draw part inspection apparatus characterized by comprising: It comprises a PLC controller (1), a size measuring mechanism, a driving mechanism and a data acquisition terminal (2); the size measuring mechanism and the driving mechanism are both used for being installed on a lower die (11) of a trimming die, an output end of the driving mechanism is connected with the size measuring mechanism; the PLC controller (1) is connected with the driving mechanism and the data acquisition terminal (2) respectively; the data acquisition terminal (2) is in communication connection with the size measuring mechanism.

2. The press draw part inspection apparatus according to claim 1, wherein A plurality of the size measuring mechanisms and the driving mechanisms are both installed on the lower die (11) at intervals; each size measuring mechanism is connected with an output end of one driving mechanism; a plurality of the driving mechanisms are connected with the PLC controller (1) respectively; a plurality of the size measuring mechanisms are connected with the data acquisition terminal (2).

3. The press draw part inspection apparatus according to claim 2, wherein The size measuring mechanism comprises a first mounting plate (3), a digital micrometer (4) and a sensing feeler (5); the digital micrometer (4) is installed on the first mounting plate (3); the sensing feeler (5) is installed on the first mounting plate (3) and a feeler end of the sensing feeler (5) is located at a measuring end of the digital micrometer (4); an output end of the driving mechanism is connected with the first mounting plate (3); the digital micrometer (4) is in communication connection with the data acquisition terminal (2).

4. The press draw part inspection apparatus according to claim 3, wherein The size measuring mechanism further comprises a spring-loaded pin (6) which is installed on the first mounting plate (3) and one end of which is connected with the sensing feeler (5).

5. The press draw part inspection apparatus according to claim 4, wherein The sensing feeler (5) is in L-shaped structure, one end of which is a connecting end and the other end of which is a feeler end; the spring-loaded pin (6) comprises a pin, a spring and a connecting block; one end of the pin is fixedly installed on the first mounting plate (3) and is arranged in parallel with the digital micrometer (4); the connecting block is slidably installed on the other end of the pin; the spring is sleeved on the pin and located between the connecting block and the first mounting plate (3); the connecting end of the sensing feeler (5) is connected with the connecting block and the feeler end of the sensing feeler (5) is located in front of the measuring end of the digital micrometer (4).

6. The press draw piece inspection apparatus of claim 2 wherein, The driving mechanism comprises a cylinder (7) and an electromagnetic valve (8); an output end of the cylinder (7) is connected with the size measuring mechanism; the electromagnetic valve (8) is installed on a stretching and retracting pipeline of the cylinder (7) and is electrically connected with the PLC controller (1).

7. The device according to any one of claims 1 to 6, characterized in that It further comprises a position sensor (9) which is installed on the lower die (11) and is in communication connection with the PLC controller (1).

8. The press-drawn part inspection apparatus according to claim 7, characterized by It further comprises a mounting rack (10) which is installed on a periphery of the lower die (11) at a predetermined position and on which the driving mechanism is installed.

9. The press draw part inspection apparatus of claim 8 wherein, The installation height of the size measuring mechanism is the same as the height of an edge of a stamping and drawing piece to be measured.

10. The press draw part inspection apparatus of claim 8 wherein, The data acquisition terminal (2) comprises a computer, a mobile phone or a tablet computer.

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