Stamping sheet material on-line visual inspection equipment

Abstract

The utility model discloses stamping sheet material on-line visual inspection equipment which comprises a clockwise rotating disc seat, and a feeding station, a first visual inspection station, a second visual inspection station, a sheet material temporary storage station, a good product output station and a defective product output station are sequentially arranged at six equally-divided positions of the clockwise rotating disc seat in the clockwise direction. And sheet material brackets are fixedly arranged at six equal parts of the clockwise turntable seat. According to the utility model, the turntable structure is adopted, a plurality of channels are arranged on the turntable and correspond to a plurality of different stations, after the sheet stock of the lead frame is fed into the detection channel on the turntable from the feeding station, the turntable drives the sheet stock of the lead frame to rotate, the sheet stock of the lead frame intermittently stops when rotating by 60 degrees every time, and the upper and lower surfaces of the lead frame are respectively subjected to linear scanning imaging at the stopped interval; due to linear scanning imaging in a static state, the sheet stock does not shake in the imaging process, the imaging quality and the detection precision are improved, and meanwhile the false alarm rate of a detection result is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of chip lead frame production equipment, in particular to an online visual inspection device for stamping sheets. Background Art

[0002] When producing chip lead frames, the sheets need to be stamped. The stamped sheets need to be inspected for good products by lead frame online visual inspection equipment to separate defective products.

[0003] The existing online visual inspection equipment for lead frames can only inspect one side at present, and the lead frame is transported and moved on the belt conveyor line to realize the single-sided inspection of the lead frame. Since the belt conveyor mechanism itself has a certain degree of jitter instability, the image quality of the lead frame is reduced and unstable due to jitter during the inspection and imaging process, which increases the probability of false alarms in the visual inspection program. In addition, the machine can only realize single-sided inspection of sheets and alarm for defective products. The back end cannot distinguish and stack qualified sheets from defective sheets. The defective sheets can only be found manually after hearing the alarm, which leads to low efficiency in production. Therefore, there is room for further improvement. Utility Model Content

[0004] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide an online visual inspection device for stamping sheets to solve the above problem.

[0005] In order to achieve the above-mentioned purpose, an online visual inspection device for stamping sheets is provided, including a clockwise turntable seat, wherein the six equally divided positions of the clockwise turntable seat are provided with a feeding station, a first visual inspection station, a second visual inspection station, a sheet buffer station, a good product output station and a defective product output station in a clockwise direction, and the six equally divided positions of the clockwise turntable seat are all fixedly provided with sheet brackets, the feeding station is located above the clockwise turntable seat, and the feeding station is provided with a front-end stacking blanking mechanism above the corresponding sheet bracket, and the front-end stacking blanking mechanism is provided. An adjustable belt conveyor is fixedly connected to one end of the blanking mechanism away from the clockwise turntable seat, and the first visual inspection station and the second visual inspection station are respectively provided with visual inspection mechanisms below and above the side of the corresponding sheet material holder away from the feeding station, and the good product output station and the defective product output station are both provided with discharge stacking blanking mechanisms at one end of the corresponding sheet material holder away from the clockwise turntable seat, and a jacking mechanism is provided below the two discharge stacking blanking mechanisms, and the good product output station is provided with a good product discharge belt conveyor below the pneumatic jacking mechanism.

[0006] According to the online visual inspection equipment for stamped sheets, the clockwise turntable seat includes a turntable body, a cam divider and a stepper motor, the turntable body is fixed on the cam divider, the cam divider is connected to the stepper motor drive, and the six sheet material brackets are all fixed on the turntable body.

[0007] According to the online visual inspection equipment for stamping sheets, the visual inspection mechanism includes a linear motor, a line scan camera, a line scan light source, and a backlight light source. The line scan camera and the line scan light source are both fixed to the mover of the linear motor through structural parts, and the backlight light source is installed on the side of the stator of the linear motor away from the sheet holder.

[0008] According to the online visual inspection equipment for stamping sheets, the front-end stack blanking mechanism includes a stack cylinder, a stack slider, a stack support plate, a cache cylinder, a cache slider, a cache support plate, a left plate, a right plate and an elastic baffle. The main body of the front-end stack blanking mechanism is composed of a left plate and a right plate. The upper outer sides of the left plate and the right plate are fixedly connected with stack cylinders, the output ends of the two stack cylinders are fixedly connected with stack sliders, the bottoms of the two stack sliders are fixedly connected with stack support plates, the lower outer sides of the left plate and the right plate are fixedly connected with cache cylinders, the output ends of the two cache cylinders are fixedly connected with cache sliders, the bottoms of the two cache sliders are fixedly connected with cache support plates, the two stack support plates and the two cache support plates pass through the left plate and the right plate respectively, and an elastic baffle is provided on the upper inner side of the right plate.

[0009] According to the on-line visual inspection device for stamping sheets, the structures of the two discharging stack blanking mechanisms are the same as the structure of the front-end stack blanking mechanism.

[0010] According to the online visual inspection equipment for stamped sheets, an electric baffle is provided at one end of the six sheet holders away from the turntable body, and a motor-driven synchronous belt is provided above the good product output station and the defective product output station, and a sheet push plate is fixedly connected under the belt body of the plurality of motor-driven synchronous belts.

[0011] According to the online visual inspection equipment for stamping sheets, the adjustable belt conveyor, the good product discharge belt conveyor and the jacking mechanism are all public logistics equipment on the existing market.

[0012] The above solution has at least one of the following beneficial effects:

[0013] 1. The utility model adopts a turntable structure with multiple channels on the turntable corresponding to multiple different workstations. After the lead frame sheet is fed into the detection channel on the turntable by the feeding station, the turntable rotates with the lead frame sheet and stops intermittently every 60 degrees. During the interval of stopping, line scanning imaging is realized on the upper and lower sides of the lead frame respectively. Since it is line scanning imaging in a static state, the sheet will not jitter during the imaging process, thereby improving the imaging quality and detection accuracy, while reducing the false alarm rate of the detection result, and enhancing the practicality of the device.

[0014] 2. The discharging end of the utility model adopts a dual-channel output mode, and through the corresponding stacking mechanism, the defective and good lead frames are neatly stacked in different channels, and it is no longer necessary to manually select the defective lead frames later, which improves the quality of visual inspection during stamping production and the stability of the inspection results, improves the inspection efficiency, reduces the labor intensity of workers, and enhances the practicality of the device.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of an online visual inspection device for stamping sheets of the utility model;

[0018] Figure 2 This is a schematic diagram of a workstation top view of an online visual inspection device for stamping sheets of the utility model;

[0019] Figure 3 This is a top-down perspective structural diagram of an online visual inspection device for stamping sheets of the utility model;

[0020] Figure 4 This is a schematic diagram of the bottom three-dimensional structure of an online visual inspection device for stamping sheets of the utility model;

[0021] Figure 5 It is a three-dimensional structural schematic diagram of a front-end stacking and blanking mechanism of an online visual inspection device for stamping sheets of the utility model.

[0022] Legend:

[0023] 1. Clockwise turntable seat; 101. Turntable body; 102. Cam divider; 103. Stepper motor; 2. Feeding station; 3. First visual inspection station; 4. Second visual inspection station; 5. Sheet material buffer station; 6. Good product output station; 7. Defective product output station; 8. Adjustable belt conveyor; 9. Front end stacking blanking mechanism; 91. Stacking cylinder; 92. Stacking slider; 93. Stacking support plate; 94. Buffer cylinder; 95. Buffer slider; 96. Buffer support plate; 97. Left side plate; 98. Right side plate; 99. Elastic baffle; 10. Sheet material bracket; 11. Visual inspection mechanism; 111. Linear motor; 112. Line scan camera; 113. Line scan light source; 114. Backlight light source; 12. Discharging stacking blanking mechanism; 13. Good product discharging belt conveyor; 14. Lifting mechanism. DETAILED DESCRIPTION

[0024] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0025] Reference Figure 1-5The embodiment of the utility model provides an online visual inspection device for stamping sheets. The feeding station 2 at the front end of the machine is provided with an adjustable belt conveyor 8. The front end of the adjustable belt conveyor 8 is provided with a rotatable and retractable adjusting arm to flexibly and conveniently adjust the position of the belt conveyor and the docking point of different punching machines and different molds; the discharge end of the adjustable belt conveyor 8 is provided with a front-end stacking blanking mechanism 9, and the front-end stacking blanking mechanism 9 is provided with a buffering function. Under normal production rhythm, each sheet output by the stamping line falls to the sheet bracket 10 below at a fixed rhythm. If the conveyed sheet rhythm If an abnormality occurs in the punching line, the sheet material will be temporarily stored in the buffer area of ​​the front stacking blanking mechanism 9, and the several sheets stored in the buffer area will fall to the sheet material bracket 10 as a whole, and finally be output through the defective product output station 7 at the rear end; this ensures that production and detection are not interrupted and stopped when an abnormality occurs in the punching line; the clockwise turntable seat 1 includes a turntable body 101, a cam divider 102 and a stepper motor 103, the turntable body 101 is fixed on the cam divider 102, the cam divider 102 is connected to the stepper motor 103, and the six sheet material brackets 10 are fixedly arranged on the turntable body 10 1, the main body of the sheet material bracket 10 is composed of two adjustable support rods, and the ends of the six sheet material brackets 10 away from the turntable body 101 are all provided with electric baffles, and the good product output station 6 and the defective product output station 7 are provided with motor-driven synchronous belts above the sheet material bracket 10, and the belt bodies of the plurality of motor-driven synchronous belts are all fixedly connected with sheet material push plates below; the turntable is intermittently rotated by the cam divider at a fixed beat, and when it stops, one of the adjustment brackets 10 is located directly below the front-end stacking blanking machine 9, and the front-end sheet material to be inspected is directly and accurately delivered to the front-end stacking blanking machine 9 during the interval when the turntable stops. The sheet material falls onto the sheet material bracket 10, and the sheet material to be inspected is rotated to different stations for inspection and output through the rotation of the turntable; the cam divider 102 is driven by the servo motor 103 to facilitate the adjustment of different production beats and the manual mode adjustment during the debugging by the operator; the adjustable baffle at the end of the bracket blocks the sheet material during the rotation of the sheet material, and prevents the sheet material from sliding out of the bracket under the action of centrifugal force. The adjustable baffle is driven by an electromagnet and can rotate to a certain angle; when the sheet material is to be pushed out from the bracket at the output station, the baffle is driven by the electromagnet to rotate and separate from the sheet material, so that the sheet material can be pushed out smoothly without obstruction;

[0026] Two inspection stations are arranged at the intermittent stop position of the turntable, namely the first visual inspection station 3 and the second visual inspection station 4; the first visual inspection station 3 inspects the back of the sheet, and the second visual inspection station 4 inspects the front of the sheet; the visual systems of the two visual inspection stations are composed of a line scan camera 112, a line scan light source 113 and a backlight light source 114; wherein the line scan camera 112 and the line scan light source 113 are fixed on the mover of the linear motor 111 through structural parts; when the sheet and the turntable are in an intermittent stop state, the linear motors 111 of the two visual inspection mechanisms 11 are started at the same time, respectively driving the two sets of visual systems to move in a straight line at a uniform speed, so as to complete the visual imaging of the top and bottom of the sheet;

[0027] The intermittent stop position of the turntable is provided with a sheet buffer station 5 and two sheet output stations, namely a good product output station 6 and a defective product output station; after the sheet is imaged by the two visual imaging stations in front, the sheet buffer station 5 provides a beat time for the visual program to perform calculation judgment, so as to judge whether the result of the sheet visual inspection is a good product or a defective product before the sheet is output, so as to prepare for the sheet output of the subsequent station; if the sheet is judged to be a good product by the visual program, when the sheet is intermittently stopped at the good product output station 6, the electric synchronous belt of the sheet bracket 10 is started, and the electric synchronous A sheet material pusher is fixed on the belt. Driven by the synchronous belt, the pusher pushes the sheet material in front of it along the sheet material bracket 10. The pushed sheet material enters the discharge stacking blanking mechanism 12 of the good product output station 6. A lifting mechanism 14 is arranged below the discharge stacking blanking mechanism 12 of the good product output station 6. The sheets are neatly stacked one by one on the support plate of the lifting mechanism 14. When the number of stacked sheets reaches the set number, the lifting mechanism 14 descends, bringing the stack of sheets stacked on the support plate down and placing them on the good product discharge belt conveyor 13. The good product discharge belt conveyor 13 runs. A stack of neatly stacked sheets is gradually output; in the process of the lifting mechanism 14 below the discharge stack blanking mechanism 12 of the good product output station 6 descending and rising to reset, the subsequent good product sheets on the turntable are temporarily stacked in the buffer area of ​​the discharge stack blanking mechanism 12, and when the lifting mechanism 14 rises and resets to the set height, the sheets in the buffer area of ​​the discharge stack blanking mechanism 12 are released and fall onto the support plate of the lifting mechanism 14; when the sheet is judged as a defective product at the buffer calculation station, the sheet is rotated to the defective product output station 7, and the discharge stack of the defective product output station 7 falls The material mechanism 12 and the lifting mechanism 14 are in operation, and defective sheets are neatly stacked one by one on the support plate of the lifting mechanism 14. When the number of stacked sheets reaches the set number, the lifting mechanism 14 descends, and the system starts an alarm to remind the worker to take away the neatly stacked defective sheets. After the worker takes away the sheets, the lifting mechanism 14 rises and resets to the initial set height position to continue stacking the defective sheets. In the process of the lifting mechanism 14 descending and then rising and resetting to the initial height position, the subsequent defective sheets will be temporarily stacked in the sheet buffer area of ​​the defective stacking machine;

[0028] like Figure 4 As shown, the front-end stack blanking mechanism 9 includes a stacking cylinder 91, a stacking slider 92, a stacking support plate 93, a buffer cylinder 94, a buffer slider 95, a buffer support plate 96, a left plate 97, a right plate 98 and an elastic baffle 99. The main body of the front-end stack blanking mechanism 9 is composed of a left plate 97 and a right plate 98. The left plate 97 and the right plate 98 are respectively connected to two adjustable drag rods of the sheet material bracket 10. The upper outer sides of the left plate 97 and the right plate 98 are fixedly connected with the stacking cylinder 91. The delivery rods of the two stacking cylinders 91 are connected to the upper outer sides of the left plate 97 and the right plate 98. The output end is fixedly connected with a stacking slider 92, and the bottoms of the two stacking sliders 92 are fixedly connected with stacking support plates 93. The outer lower parts of the left plate 97 and the right plate 98 are fixedly connected with a cache cylinder 94. The output ends of the two cache cylinders 94 are fixedly connected with cache sliders 95, and the bottoms of the two cache sliders 95 are fixedly connected with cache support plates 96. The two stacking support plates 93 and the two cache support plates 96 penetrate the left plate 97 and the right plate 98 respectively, and an elastic baffle 99 is provided on the inner upper part of the right plate 98. The structure of the stacking blanking mechanism 12 is the same as that of the front-end stacking blanking mechanism 9; when the good-quality sheet material is pushed into the discharge stacking blanking mechanism 12 of the good-quality output station 6, the sheet material is supported on both sides of the sheet material by the upper stacking support plate 93, and then the stacking cylinders 91 on both sides are started synchronously after receiving the system feedback signal, and the stacking support plates 93 are quickly retracted outward at the same time, and a sheet material on the stacking support plate 93 is quickly released and falls onto the support plate of the lifting mechanism 14 below; when the number of sheets stacked on the lifting mechanism 14 reaches the set number, the lifting mechanism 14 is lifted. The lifting mechanism 14 is lowered and releases a stack of sheets, and then rises and resets. During this process, the buffer cylinder 94 of the lower layer is started, driving the buffer slides 95 and buffer pallets 96 on both sides to extend forward respectively, and the sheets subsequently transported to the stacking machine are released one by one by the stacking slides 92 of the upper layer and stored on the buffer pallet 96. When the lower lifting mechanism 14 rises and resets to the set height, the buffer cylinder 94 is started and the slides and pallets are synchronously and quickly retracted, and the buffered sheets are released as a whole and fall onto the pallet of the lifting mechanism 14;

[0029] Working principle: The utility model adopts a turntable structure, and is provided with six channels on the turntable, which correspond to six different stations in the clockwise rotation direction, and a sheet material bracket 10 for placing the lead frame sheet is provided at each of the six channels. After the lead frame sheet is fed into the sheet material bracket 10 of the detection channel on the turntable by the front-end stacking and blanking mechanism 9 of the feeding station 2, the turntable rotates with the lead frame sheet, and stops intermittently every 60 degrees. During the stopping interval, the visual inspection mechanisms of the first visual inspection station 3 and the second visual inspection station 4 respectively inspect the upper and lower surfaces of the lead frame in turn. Line scanning imaging is realized respectively. Since it is line scanning imaging in a static state, the sheet material will not jitter during the imaging process, which improves the imaging quality and detection accuracy, while reducing the false alarm rate of the detection results. The discharging end of the utility model adopts a dual-channel output method, and through the corresponding stacking mechanism, the defective and good lead frames are divided into different channels and stacked neatly, and there is no need to manually select the defective lead frames later, which improves the quality of visual inspection during stamping production and the stability of the detection results, improves the detection efficiency, and reduces the labor intensity of workers.

[0030] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. An online visual inspection device for stamping sheets, comprising a clockwise turntable seat (1), characterized in that: The six equally divided positions of the clockwise turntable seat (1) are provided with a feeding station (2), a first visual inspection station (3), a second visual inspection station (4), a sheet material buffer station (5), a good product output station (6) and a defective product output station (7) in sequence in a clockwise direction. The six equally divided positions of the clockwise turntable seat (1) are all fixedly provided with sheet material brackets (10). The feeding station (2) is located above the clockwise turntable seat (1). The feeding station (2) is provided with a front-end stacking blanking mechanism (9) above the corresponding sheet material bracket (10). The end of the front-end stacking blanking mechanism (9) away from the clockwise turntable seat (1) is fixedly connected to An adjustable belt conveyor (8), the first visual inspection station (3) and the second visual inspection station (4) are respectively provided with visual inspection mechanisms (11) below and above the corresponding sheet material holder (10) on the side away from the feeding station (2), the good product output station (6) and the defective product output station (7) are both provided with discharge stack blanking mechanisms (12) at the end of the corresponding sheet material holder (10) away from the clockwise turntable seat (1), and the two discharge stack blanking mechanisms (12) are both provided with lifting mechanisms (14) below, and the good product output station (6) is provided with a good product discharge belt conveyor (13) below the pneumatic lifting mechanism (14).

2. The on-line visual inspection equipment for stamping sheets according to claim 1 is characterized in that: The clockwise turntable seat (1) comprises a turntable body (101), a cam divider (102) and a stepping motor (103); the turntable body (101) is fixed on the cam divider (102); the cam divider (102) is drivingly connected to the stepping motor (103); and the six sheet material brackets (10) are all fixed on the turntable body (101).

3. The on-line visual inspection equipment for stamping sheets according to claim 1, characterized in that: The visual inspection mechanism (11) comprises a linear motor (111), a line scan camera (112), a line scan light source (113), and a backlight light source (114); the line scan camera (112) and the line scan light source (113) are both fixed to a mover of the linear motor (111) via structural components; and the backlight light source (114) is installed on a side of the stator of the linear motor (111) away from the sheet material holder (10).

4. The on-line visual inspection equipment for stamping sheets according to claim 1, characterized in that: The front-end stack blanking mechanism (9) comprises a stack cylinder (91), a stack slider (92), a stack support plate (93), a cache cylinder (94), a cache slider (95), a cache support plate (96), a left side plate (97), a right side plate (98) and an elastic baffle (99). The main body of the front-end stack blanking mechanism (9) is composed of a left side plate (97) and a right side plate (98). The upper sides of the left side plate (97) and the right side plate (98) are both fixedly connected to the stack cylinder (91). The output ends of the two stack cylinders (91) are fixedly connected to the stack sliders (92). The bottom of each of the stacking slide blocks (92) is fixedly connected to a stacking support plate (93); the lower outer sides of the left side plate (97) and the right side plate (98) are fixedly connected to a cache cylinder (94); the output ends of the two cache cylinders (94) are fixedly connected to a cache slide block (95); the bottoms of the two cache slide blocks (95) are fixedly connected to a cache support plate (96); the two stacking support plates (93) and the two cache support plates (96) respectively penetrate the left side plate (97) and the right side plate (98); and an elastic baffle (99) is provided on the upper inner side of the right side plate (98).

5. The on-line visual inspection equipment for stamping sheets according to claim 4 is characterized in that: The structures of the two discharging stack blanking mechanisms (12) are the same as the structure of the front stack blanking mechanism (9).

6. The on-line visual inspection equipment for stamping sheets according to claim 1, characterized in that: The adjustable belt conveyor (8), the good product discharge belt conveyor (13) and the lifting mechanism (14) are all publicly available logistics equipment on the market.

7. The on-line visual inspection equipment for stamping sheets according to claim 1 is characterized in that: An electric baffle is provided at one end of the six sheet material holders (10) away from the turntable body (101); a motor-driven synchronous belt is provided above the good product output station (6) and the defective product output station (7); and sheet material push plates are fixedly connected below the belt bodies of the plurality of motor-driven synchronous belts.

Images