CN100464190C - Pin automatic direction identification device - Google Patents

Abstract

The automatic direction identification device for inserting pins involves a direction changing mechanical device. The invention provides an automatic pin sorting device for a pin automatic direction identification device that can make the pins enter into the measuring equipment in the same direction. The pin automatic direction identification device is composed of a serpentine slideway, a slideway cover, a baffle and a direction discrimination block. The serpentine slideway and the slideway cover form a wave-shaped slideway with the same height. The serpentine slideway There is a feed inlet on the top side, a baffle is fixed at the lower end of the serpentine slideway, and a direction-discriminating block is fixed on the bottom of the serpentine slideway and the baffle, and the direction-discriminating block has a "middle" long hole in the middle. The flat plate, the "middle" shaped long hole runs through the bottom of the slideway, the width of both ends is greater than the diameter of the measuring end of the tested pin, but smaller than the diameter of the tested pin terminal, the width of the middle of the "middle" shaped long hole is greater than The maximum diameter of the pin under test. The invention has the advantages of simple structure, low cost and high reliability, and can be applied to the existing devices that need to distinguish the direction of pins.

Description

Pin automatic direction identification device

technical field

The present invention relates to a direction changing mechanism.

Background technique

Automatic sorting and measuring devices have been widely used at home and abroad, mainly focusing on the sorting and measuring of some regular objects, without the need for direction identification, but for the automatic sorting and measuring of products with special structures such as pins (see Figure 8), The determination of the direction and the storage of the workpiece must be carried out first, and then the specific position can be accurately measured, but at present, no domestic manufacturer has successfully developed it. The main reasons are:

1. The pin is an irregular cylinder, with a boss with a large diameter in the middle, and the diameters at both ends are also inconsistent. One end is the measuring end, which is a cylindrical shape with the same diameter. It is also the object to be measured and sorted. One end is the terminal, which is an irregular cylindrical shape. It is a combination of a cylinder and a semicircular milling groove for welding wires. Generally, in the sorting equipment, it is necessary to detect the diameter of the measuring end at 7mm for sorting. However, the traditional feeding detection method for such an irregular structure of the pin cannot realize the determination of the direction of the pin insertion, let alone the requirement of accurately detecting the 7mm of the thin end.

2. Since the terminals of the pins have semicircular milling grooves for wiring, in general direction identification devices, it often happens that the measuring end of the pins is inserted into the semicircular milling grooves of the terminals, resulting in jamming and stacking of materials, which in turn affects the entire Measure the operation of the sorting mechanism.

3. Due to the small size and light weight of the pins, each pin is generally only more than ten grams. How to ensure that the pins can slide smoothly in the direction identification device and prevent the phenomenon of material jamming, material return and misjudgment is also a key issue for the entire industry. Institutional difficulties.

At present, electronic products have filled all aspects of people's lives, and the types and quantities of electronic products are increasing. As an important part of electrical connection in electronic products, the demand for connectors is also increasing. Pins are exactly An important electrical connection part in the connector. The pin is responsible for the electrical signal connection of the electrical connector, and its quality plays a key role in the function realization of the electrical connector. The size of the measuring end directly affects the stability of the contact point. If it is too small, It will lead to virtual connection, so that the electrical connection is sometimes good and sometimes bad. If it is too large, it will make the pins unsuitable for plugging and unplugging, or even unable to plug in, and the purpose of plugging and unplugging the connector at any time cannot be realized. Therefore, in actual production, the detection and sorting of the outer diameter of the pin measurement end is a key process to ensure the production of high-quality connectors.

At present, most of the detection methods for the measuring ends of the pins rely on inspectors to measure the diameters of the pins one by one with a micrometer. This working method not only has high work intensity and low efficiency, but also makes it difficult to guarantee the quality of detection. According to statistics, if you work continuously in one working day, each person can only complete about 6,000 pieces, while the factory needs nearly 10 million pieces of pins a year. In order to meet the production requirements, overtime is often adopted. , Inspectors are prone to fatigue under this monotonous working method, which may easily lead to missed inspections and wrong inspections. Therefore, a device for automatically measuring and sorting the diameter of the measuring end of the pin came into being. The existing automatic measuring and sorting device for pin insertion is based on the structure and working principle of the existing automatic sorting and measuring device, but the direction identification mechanism in this type of device mainly uses the center of gravity position method to identify the direction of the workpiece in China, and the workpiece falls Use the center of gravity of the object to keep the direction of the workpiece consistent. For the deviation of the measured center of gravity of the pins of the workpiece to be tested is between 0.89mm and 1.24mm, it is feasible to use the deviation of the center of gravity to distinguish the direction in theory, but in practical applications, due to the influence of vibration, this orientation method is not accurate. There will be 10 to 20% of the workpiece positioning errors. For this reason, a new direction-discriminating mechanism must be adopted for special structural workpieces such as pins, which are small in size, light in weight, and irregular in shape.

Contents of the invention

In order to provide an automatic pin detection device for the automatic pin sorting device, so that the pins can enter the storage bin of the measuring equipment in a consistent direction, the present invention provides an automatic pin detection device.

The automatic pin identification device of the present invention is composed of a slideway 20, a slideway cover plate 10, a baffle plate 30 and a direction-discriminating block 40. The slideway 20 is a groove with a wave-shaped step on the inner bottom surface. The inner diameter of the groove is d4, and the d4 is greater than the length d13 of the tested pin. The end of the upper part of the wave-shaped ladder in the groove of the slideway 20 has a fixed wall 21 parallel to the ladder with a height of h6. The slideway 20 is perpendicular to the The inclination angle of the direction is a, and the crests and troughs of the wavy steps are circular arcs with a radius of r1, and the side wall on one side of the slideway 20 intersects with the fixed wall 21 to have a feed port 25, the feed The bottom surface of the mouth 25 is flush with the bottom surface of the groove in the slideway 20, and the sidewalls on both sides of the slideway 20 extend out of the bottom surface step w2 of the slideway, and baffle plates 30 are fixed at the ends of the two sidewalls of the slideway 20. The bottom of the baffle plate 30 and the slideway 20 is fixed with a direction-discriminating block 40, which is a flat plate with a "middle"-shaped long hole in the middle, and the "middle"-shaped long hole is located on the side wall of the slideway 20 and In the rectangular space formed by the ladder and the baffle 30, the length of the "middle" long hole is the inner diameter d4 of the slideway 20, and the width is w1, and the w1 is between the diameter d10 of the measuring end of the tested pin and the diameter d12 of the terminal , the middle of the "middle" long hole is a rectangular hole with a width w2 and a length l3, the w2 is greater than the maximum diameter d11 in the middle of the tested pin, and the slideway cover 10 is fixed on the slideway 20, so that the slideway 20 is in a sealed shape, and the slideway cover plate 10 has a wave-shaped protrusion corresponding to the wave-shaped step on the bottom surface of the slideway 20. The radius of the crest and trough of the wave-shaped protrusion is r1. The bottom surface of the slideway 20 forms a slideway of a serpentine space with a consistent height.

The automatic pin orientation identification device of the present invention has the advantages of simple structure, low cost, and high reliability. After testing, 200,000 workpieces have been tested continuously, and there is no phenomenon of orientation error.

Description of drawings

Fig. 1 is the main cross-sectional diagram of the automatic pin identification device of the present invention, Fig. 2 is a front view of the slideway cover 10 in Fig. 1, Fig. 3 is a B-B sectional view of Fig. 2, Fig. 4 is a slide The front view of the track 20, the baffle plate 40 and the orientation block 40, Fig. 5 is the left view of Fig. 4, Fig. 6 is the top view of Fig. 4, Fig. 7 is the A-A sectional view of Fig. 5, Fig. 8 is the structure of the tested pin schematic diagram.

Detailed ways

This embodiment will be described with reference to FIGS. 1 to 7 . The automatic pin identification device of this embodiment is composed of a slideway 20, a slideway cover plate 10, a baffle plate 30 and a direction-discriminating block 40. The slideway 20 is a groove with a wave-shaped step on the inner bottom surface, so The inner diameter of the groove is d4, and the d4 is greater than the length d13 of the tested pin. The end of the upper part of the wave-shaped ladder in the groove of the slideway 20 has a fixed wall 21 parallel to the ladder with a height of h6. The slideway 20 The inclination angle with the vertical direction is a, the crests and troughs of the wavy steps are circular arcs with a radius of r1, and the side wall on one side of the slideway 20 intersects the fixed wall 21 with a feed port 25, the The bottom surface of the feed inlet 25 is flush with the bottom surface of the groove in the slideway 20, and the sidewalls on both sides of the slideway 20 extend out the steps w2 on the bottom surface of the slideway, and baffles 30 are fixed at the ends of the two sidewalls of the slideway 20 At the bottom of the baffle plate 30 and the slideway 20, a direction-discriminating block 40 is fixed. The direction-changing block 40 is a flat plate with a "middle"-shaped long hole in the middle, and the "middle"-shaped long hole is located on the side of the slideway 20. In the rectangular space formed by the wall, the ladder and the baffle plate 30, the length of the "middle" long hole is the inner diameter d4 of the slideway 20, and the width is w1, the diameter d10 of the measuring end of the w1 at the measured pin and the diameter d12 of the terminal Between, the middle of the "middle" long hole is a rectangular hole with a width w2 and a length l3, the w2 is greater than the maximum diameter d11 in the middle of the tested pin, and the slideway cover plate 10 is fixed on the slideway 20, so that The slideway 20 is in a sealed shape, and the part of the slideway cover plate 10 corresponding to the wave-shaped step on the bottom surface of the slideway 20 has a wave-shaped protrusion, and the radius of the crest and trough of the wave-shaped protrusion is r1. The projection and the bottom surface of the slideway 20 form a slideway with a serpentine space of the same height.

The automatic pin orientation identification device of this embodiment realizes the orientation identification by utilizing the difference in the geometric shapes at both ends of the workpiece, so that the pin under test always falls with a small head downwards, so as to achieve the purpose of orientation identification. When in application, the fixed wall 21 of the automatic pin identification device of the present invention is fixed on the vibrating hopper, and the feed port 25 of the automatic pin identification device is corresponding to the outlet of the vibrating hopper, so that it can come out from the vibrating hopper. The pins enter the slideway 20 from the feed port 25 of the automatic pin orientation identification device of the present invention, and the lower end of the identification block 40 of the automatic pin orientation identification device is also the output of the automatic pin orientation identification device. The mouth is connected with the storage device of the measuring device through a pipeline. After the pins enter the slideway 20 sequentially from the outlet of the vibrating hopper, they slide down step by step along the wave-shaped steps in the wave-shaped space formed by the slideway 20 and the slideway cover plate 10. When sliding When reaching the bottom of the slideway 20, the insertion pin falls on the "middle" shaped elongated hole of the block 40. The middle of the insertion pin is wider, and the two ends are asymmetrical structures, that is, one end is thinner and the other end is thicker. The middle width of the "middle" elongated hole of the block 40 is greater than the maximum diameter of the tested pin, so the thickest part of the middle part of the pin can leak down, and because the two ends of the "middle" elongated hole of the block 40 are distinguished The width is equal, greater than the diameter of the measuring end of the tested pin and smaller than the diameter of the terminal of the tested pin, that is, the measured end of the tested pin can pass through the "middle" long hole of the identification block 40 smoothly, and the tested pin The terminal of the pin cannot pass through the "middle"-shaped long hole of the direction-discriminating block 40, so when the tested pin falls on the "middle"-shaped long hole of the direction-discriminating block 40, the measuring end and the middle of the measured pin are most The wide part can continue to fall, causing the tested pin to stand up and fall with the measuring end downward. Drop it into the widest rectangular hole in the middle of the hole to complete the direction identification of the tested pin.

The vertical inclination angle of the slideway 20 in this embodiment is a, which changes according to the quality of the tested pin. When the mass of the tested pin is relatively large, the inclination angle a should be smaller to reduce the The sliding speed of the tested pin, when the mass ratio of the tested pin is small, the inclination angle a should be too large to increase the sliding speed of the pin, and the inclination angle a can be set between 110° and 130° between. The wavy steps on the inner bottom surface of the slideway 20 have 3 or 4 crests, so as to ensure that the tested pin can smoothly roll down to the direction-discriminating block 40 at the bottom of the slideway 20 . The radius r1 of the crest and trough of the slideway 20 is 1.0 to 1.2 times the maximum diameter d12 of the tested pin, which ensures that a pin can be stably placed on each step. The height h6 of the fixed wall 21 of the slideway 20 is 1.0 to 1.2 times the maximum diameter d12 of the tested pin, so as to ensure that a pin can smoothly enter from the feed port.

The automatic orientation identification device of this embodiment is made of organic materials such as plexiglass and PCV. Long and easy to process. According to the calculation of the wear and tear of the device itself in this embodiment, a set of the device can complete more than 200 million workpiece orientations based on the calculation of the orientation identification of 40,000 pieces of pins per day without other accidental damage.

For the pin automatic direction identification device of this embodiment, for tested pins of different specifications and sizes, it is only necessary to change the inner diameter d4 of the slideway 20 and the radius r1 of the peak and trough of the slideway, as well as the "middle" shape of the direction identification block 40 The size of the long hole is enough, and it is easy to realize serialization.

Claims (6)

1. automatic direction-recognizing device for ferrule, it is by slideway (20), slideway cover plate (10), baffle plate (30) and sensing piece (40) are formed, it is characterized in that described slideway (20) is that inside bottom surface is the groove that has the waveform ladder, described groove internal diameter is d4, described d4 is greater than the length d 13 of tested contact pin, it is one parallel with ladder that the end on the waveform ladder top in the groove of slideway (20) has, height is the fixation wall (21) of h6, slideway (20) is a with the pitch angle of vertical direction, the crest of described waveform ladder and trough are the circular arcs that radius is r1, the sidewall of slideway (20) one sides and fixation wall (21) intersection have charging aperture (25), the bottom surface of described charging aperture (25) is concordant with the bottom surface of slideway (20) inner groovy, slideway (20) side walls is extended slideway bottom surface ladder w2, end at (20) two sidewalls of slideway is fixed with baffle plate (30), bottom at baffle plate (30) and slideway (20) is fixed with sensing piece (40), described sensing piece (40) have in the middle of being " in " flat board of font slotted hole, described " in " the font slotted hole is arranged in the rectangular space that slideway (20) sidewall and ladder and baffle plate (30) are formed, " in " font slotted hole length is the inner diameter d 4 of slideway (20), wide is w1, described w1 is between the diameter d 12 of the diameter d 10 of the measuring junction of tested contact pin and terminals, " in " be wide w2 in the middle of the font slotted hole, the oblong aperture of long l3, described w2 is greater than maximum diameter d 11 in the middle of the tested contact pin, described slideway cover plate (10) be fixed on slideway (20) above, what make slideway (20) is the sealing shape, the part that slideway cover plate (10) is corresponding with slideway (20) bottom surface waveform ladder has the waveform projection, the crest of described waveform projection and the radius of trough are r1, and the bottom surface of the waveform projection of slideway cover plate (10) and slideway (20) forms the slideway in highly consistent snakelike space.

2. automatic direction-recognizing device for ferrule according to claim 1, the pitch angle a that it is characterized in that the bottom surface of slideway (20) and vertical direction is between 110 ° to 130 °.

3. automatic direction-recognizing device for ferrule according to claim 1, the radius r 1 that it is characterized in that the crest of described slideway (20) and trough are 1 to 1.2 times of tested contact pin maximum diameter d 12.

4. automatic direction-recognizing device for ferrule according to claim 1, the height h6 that it is characterized in that described fixation wall (21) are 1 to 1.2 times of tested contact pin maximum diameter d 12.

5. automatic direction-recognizing device for ferrule according to claim 1 is characterized in that the waveform ladder of slideway (20) inside bottom surface has 3 or 4 crests.

6. automatic direction-recognizing device for ferrule according to claim 1 is characterized in that it is made by organic material.

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