CN210125563U - Anticollision roof beam pipe material loading letter sorting mechanism before automobile body - Google Patents

Abstract

The utility model discloses a feeding and sorting mechanism for round tubes of front anti-collision beams of a vehicle body, which comprises a feeding mechanism and a sorting mechanism; deposit among the feed mechanism and wait to detect material pipe and give letter sorting mechanism material loading, letter sorting mechanism screens the pipe, feed mechanism includes material loading support, workbin and material loading electro-magnet, the workbin is installed on the material loading support, material loading support mounting is on main body frame, the workbin is a barrel structure, has material loading mouth and feed opening, the beneficial effects of the utility model: the method for detecting the existence of the threads by the photoelectric sensor is provided, so that the internal threads can be detected quickly and accurately in large batch, and the efficiency is improved; the sorting efficiency of the device is relatively high, and the device has the characteristics of no mechanical collision impact, low noise and the like, the addition of the electric signal control system can reduce more and more complicated mechanical transmission and control systems, and the transmission of the electric signal can be faster and the efficiency is higher.

Description

Anticollision roof beam pipe material loading letter sorting mechanism before automobile body

Technical Field

The invention belongs to the technical field of thread existence detection, and particularly relates to a feeding and sorting mechanism for a front anti-collision beam circular tube of an automobile body.

Background

Along with the development of science and technology, the production and manufacturing of automobiles become mature and efficient, and people put forward higher requirements on the safety of the automobiles. As a key part of an automobile front bumper, the front anti-collision beam of the automobile body has to be improved in processing and manufacturing standards. The front anti-collision beam circular tube 8 is a welded part on the anti-collision beam as shown in fig. 1, the condition that internal threads are not machined in the previous machining process can occur, defective products flow into the next process, and the rework rate can be increased.

The processing of the internal thread of the round pipe of the front anti-collision beam of the automobile body is an important processing procedure, but the processing may be omitted in the actual production process. At present, two methods are used for detecting whether the internal thread of the circular tube is omitted, wherein one method is visual judgment; one method is to place only one round tube on the structure at a time through a screwing mechanism, and to judge whether the thread exists or not through the screwing condition of the shaft with the thread and the round tube. The first method has a high failure rate, and the second method has a low efficiency. At present, the automobile production speed is very fast, and a more efficient and more automatic device is urgently needed.

Disclosure of Invention

The front anti-collision beam circular tube feeding and sorting mechanism is provided for solving the problems that in the prior art, the automobile production speed is very high, the quantity of the front anti-collision beam circular tubes produced in batches is large, the detection workload for the existence of internal threads is large, a good detection method is not provided, and a more efficient and more automatic device is urgently needed.

A feeding and sorting mechanism for a round pipe of an anti-collision beam in front of a vehicle body comprises a feeding mechanism and a sorting mechanism;

a plurality of round tubes of materials to be detected are stored in the feeding mechanism to feed the sorting mechanism, the sorting mechanism screens the round tubes,

the feeding mechanism comprises a feeding support, a material box and a feeding electromagnet, the material box is arranged on the feeding support, the feeding support is arranged on the main body frame,

the feed box is of a cylinder structure and is provided with a feeding port and a discharging port, wherein the opening of the feeding port is larger, the opening of the discharging port is smaller, the opening shape of the discharging port is matched with the overall dimension of the circular tube, the discharging port can only allow one circular tube to pass through at one time,

a fixed bracket for mounting a feeding electromagnet is arranged on the outer side of the feed opening;

the sorting mechanism comprises a sorting bracket, a detection switch, a sorting disc, a sorting electromagnet and a driving motor,

the sorting tray is provided with a rotating shaft, can be rotationally arranged on the sorting bracket and is driven to rotate by a driving motor arranged on the sorting bracket through a motor mounting seat,

the outer surface of the sorting disc is inwards recessed along the radial direction to form a plurality of grooves for containing round tubes, electromagnet mounting holes which are corresponding to the grooves one by one and used for mounting sorting electromagnets are arranged on the sorting disc,

the detection switch is arranged on the sorting support through the detection switch support.

On the basis of the scheme, the sorting mechanism also comprises an electromagnet mounting rack, the electromagnet mounting rack is provided with electromagnet mounting plates with the shapes and the positions corresponding to the electromagnet mounting holes one by one, and is provided with round holes,

the rotating shaft penetrates through the round hole, and the electromagnet mounting plate is provided with sorting electromagnets and then is inserted into the electromagnet mounting holes.

On the basis of the scheme, the device also comprises a reset system, wherein the reset system comprises a U-shaped photoelectric switch and a reset detection sheet,

the reset detection piece is arranged on the sorting disc and comprises three parts, wherein the first part is a reset deceleration position, the second part indicates a zero stopping position, and a detection vacancy is arranged in the middle;

the U-shaped photoelectric switch is arranged on the sorting support, and the reset deceleration position, the detection vacancy position and the zero stopping position sequentially pass through a light beam transmission route of the U-shaped photoelectric switch in the rotating process of the sorting disc.

Preferably, the reset detection piece is integrally formed with the electromagnet mounting plate on the electromagnet mounting bracket.

On the basis of the scheme, the sorting mechanism further comprises a rotary conducting ring, and the rotary conducting ring is sleeved on the rotating shaft.

Preferably, the number of the detection switches is two, and the detection switches are arranged symmetrically.

The invention has the beneficial effects that:

1. the method for detecting the existence of the threads by the photoelectric sensor is provided, so that the internal threads can be detected quickly and accurately in large batch, and the efficiency is improved;

2. the sorting efficiency of the device is relatively high, and the device has the characteristics of no mechanical collision impact, low noise and the like, the addition of the electric signal control system can reduce more and more complicated mechanical transmission and control systems, and the transmission of the electric signal can be faster and the efficiency is higher.

Drawings

FIG. 1 is a cross-sectional view of a round tube to be tested;

FIG. 2 is a schematic block diagram of a photosensor;

FIG. 3 is a diffuse reflection type photosensor;

FIG. 4 is a correlation type photosensor;

FIG. 5 is a schematic view of a photoelectric sensor employed in the present invention to detect threads;

FIG. 6 is a three-dimensional model diagram of a sorting mechanism according to an embodiment of the present invention;

FIG. 7 is a three-dimensional model of a sorting tray according to an embodiment of the present invention;

FIG. 8 is a three-dimensional model of an electromagnetic chuck mounting base according to an embodiment of the present invention;

FIG. 9 is a three-dimensional model diagram of a reset detection piece according to an embodiment of the present invention;

FIG. 10 is a three-dimensional model of a body frame according to an embodiment of the present invention;

FIG. 11 is a three-dimensional model diagram of a loading mechanism according to an embodiment of the present invention;

FIG. 12 is a three-dimensional model of a bin according to an embodiment of the invention;

FIG. 13 is a schematic view of a loading principle according to an embodiment of the present invention;

FIG. 14 is a three-dimensional model of a charging cart according to an embodiment of the present invention;

FIG. 15 is a three-dimensional model of a sorter assembly according to one embodiment of the invention;

fig. 16 is a sorting flow chart according to an embodiment of the present invention.

Detailed Description

The technical scheme of the invention is further explained by combining the attached drawings in the embodiment of the invention.

The method for detecting the inner thread of the round pipe of the front anti-collision beam of the vehicle body comprises the following steps:

a method for detecting the internal thread of a round pipe of an anti-collision beam in front of a vehicle body is characterized in that a diffuse reflection type photoelectric switch is arranged on the outer side of the round pipe 8, a light beam is emitted to the surface of an internal thread in the round pipe 8 by an emitter, and the existence of the internal thread in the round pipe 8 is detected according to the difference of the intensity of reflected light received by a receiver.

Due to the wide application range of the photoelectric sensor, the research and development of the photoelectric sensor have attracted wide attention all over the world, and countries are striving for research and development to cause intense competition. From the initial military application to the civil use, the photoelectric sensor is closely related to our life, and the application of the photoelectric sensor cannot be avoided in the modern life, and the photoelectric sensor participates in precision machining, precision detection, and from space shuttles to medical instruments.

Similarly, the presence or absence of the female screw can be detected quickly by the diffuse reflection type photoelectric switch. The working principle is the light reflection principle, light rays are irradiated on a measured object, and the required information is obtained through analysis of the reflected light rays. Since the light reflected from the object is in the form of diffused light, it is called a diffused photoelectric proximity switch. The transmitter and receiver of the light of the diffuse electro-optical proximity switch are generally in the same direction. The corresponding switching value of the diffuse reflection type photoelectric switch can be set according to the laser reflection intensity of the surface when the thread exists or not, and the NPN type diffuse reflection type photoelectric sensor can output the switching value of high and low levels, so that the existence of the thread is judged.

The working principle of the photoelectric sensor is as follows:

the photosensor is generally composed of a light source, an optical path, and an optoelectronic device, as shown in fig. 2. First, the photoelectric sensor emits light of a fixed wavelength, and a change in a physical quantity of an object to be measured is converted into a change in an optical signal, and then converted into an electrical signal by the photoelectric device. The measured signal acts on the radiation source or the optical path such that the measured information is modulated onto the light wave, which changes the intensity, phase, spatial distribution or spectral distribution of the light wave. The photoelectric device converts the optical signal into an electrical signal, and then demodulates the electrical signal through a conversion circuit and separates out the measurement information, thereby obtaining the required measurement data.

Besides the intensity of light, various physical quantities such as light shielding, reflection and transmission can be measured. The photoelectric sensor can not contact with the measured object during measurement, the quality of the light beam is almost zero, and the light beam can not generate friction with the measured object. Besides the characteristics, the photoelectric sensor also has the characteristics of high resolution, high accuracy, high reaction speed and the like, and has great advantages in precision measurement. With the development of laser, optical fiber, electric coupling device, etc., the photoelectric sensor has stronger and stronger advantages, and the application of the photoelectric sensor will become more and more extensive.

Classification of the photoelectric sensors:

diffuse reflection type photoelectric sensor

When the parallel light beams strike the surface of a smooth object, the light is reflected along parallel paths, which is a mirror reflection. Roughness and smoothness are also opposite, most object surfaces are rough and uneven, when a beam of parallel light irradiates the surface of a rough object, the parallel irradiated light can be emitted in all directions, and diffuse reflection is realized. Most of the objects that we usually find are rough and uneven, such as walls, plants, table tops, etc., and although you look flat, you can see the uneven shape if you take a magnifying glass or even a microscope to see. It is because of diffuse reflection that all objects can be seen by the naked eye, and if the objects are totally specular reflection, the parallel sunlight is irradiated, so that the objects cannot be seen clearly, and the objects have a special dazzling feeling if the objects are seen along the direction of the retroreflection light.

The conventional diffuse reflection type photoelectric sensor distinguishes different objects by the intensity of reflected light. Fig. 3 is a schematic diagram of detection of a diffuse reflection type photoelectric sensor. The sensor is simultaneously provided with the emitter and the receiver, when light emitted by the emitter irradiates the surface of a non-specular object, the light can be dispersed in all directions, part of the light always irradiates the receiver, when the intensity of the light irradiated by the emitter is fixed, the intensity of the light received by the receiver can be different due to different properties of the surface of the irradiated object, and when the intensity of the received light exceeds a preset threshold value, the sensor outputs a switching value signal.

Correlation type photoelectric sensor

As shown in fig. 4, the emitter and the receiver are separated, the receiver can receive the light signal emitted from the emitter under normal conditions, when the emitter and the receiver are shielded, the light is blocked, the receiver cannot receive the light signal from the emitter, and then the receiver outputs the switching value signal. Resetting of the thread sensing device will use a U-shaped correlation photosensor, as will be described in more detail below.

Through the comparative analysis of the photoelectric sensors of various detection types, the scheme of sorting round pipes by the diffuse reflection type photoelectric sensor shown in fig. 5 is finally established according to the sorting object of the item.

According to the principle of diffuse reflection, the reflection effect of light rays on a smooth surface and a rough surface is different. When the light of the emitter irradiates the inner surface of the circular tube 8 in an inclined manner, if the inner surface of the circular tube 8 is not provided with threads, the surface of the circular tube 8 is relatively smooth, most of the light irradiates from the other side of the sensor according to the light reflection principle, and the intensity of the light received by the receiver and emitted by the emitter is very low; when the light of transmitter is inclined to shine to 8 internal surfaces of pipe, if 8 internal surfaces of pipe have the screw thread, 8 surperficial roughness on this moment of pipe, according to the principle of diffuse reflection, light can disperse all directions to pipe 8 is 60 degrees metric system screw threads, if the transmitted light is 22.5 degrees as shown in figure 5 slopes, shines the light of screw thread flank most all can be roughly along returning along former way, and the receiver can receive more reflected light. The angle of 22.5 allows the light from the emitter to strike the thread flanks and, after reflection, to pass more into the receiver.

According to the intensity of light reflected by the inner surface of the round pipe 8 with or without threads, a proper threshold value can be set for the diffuse reflection type photoelectric sensor, so that the existence of the internal threads can be judged through the output switching value.

Diffuse reflection type photoelectric sensor model selection

The light beam of the ordinary diffuse reflection type photoelectric sensor is scattered, when the internal thread of the circular tube 8 is detected, the emitted light can also irradiate other surfaces of the circular tube 8, the irradiation of the light beam is reversed, and the irradiation area is inconvenient to control. The receiver of the sensor may be easily affected by the light impinging on other surfaces.

The accuracy and precision of the sensor for detecting the threads are high, and the WT100L-E1141 diffuse reflection type photoelectric sensor of the Schker company meets the requirement of the thread detection of the device. One feature of WT100L-E1141 in comparison to a conventional diffuse reflective photosensor is that its light source is a visible laser beam with a beam diameter between 2mm and 4 mm. The laser light source with special wavelength can not be influenced by ambient light, and the stability is better. The characteristics of the light beam are particularly suitable for detecting the threads on the inner surface of the round pipe 8 of the front anti-collision beam of the vehicle body.

Use of diffusely reflective photosensors

According to the relationship between the sensing distance and the reflectance in the manual of the WT100L-E1141 sensor, when the detection distance is about 60mm, the reflectivity of the emitted laser is the largest, the total length of the round tube 8 is 75mm, and about 60mm is just the best distance for detecting the thread. Ensuring a detection distance of 60mm maximizes reflectivity, allows higher laser intensities to be received by sensor 203, and allows better discrimination between smooth and rough surface received signals. As can be seen from the cross-sectional view of the round pipe 8 in FIG. 1, the left hole of the round pipe 8 is small, the laser irradiated to the surface of the internal thread by the sensor is easily shielded, the thread is detected at the side with the larger inner diameter, the interference of the sensor arrangement is smaller, and the arrangement is more flexible and convenient. As can be seen from the shop-shopping size chart of the sensor, the detection distance is about 60mm, the diameter of the laser is about phi 3mm, and the diameter can not exceed phi 4mm at most.

The mounting positions of the sensors are reasonably arranged according to a size chart in a manual of the sensors, and the size of the sensor mounting hole is determined. Two sensors 203 are symmetrically arranged in the thread detection device in the circular tube 8, so that the detection accuracy of the device can be greatly improved. Whether the detected data are correct or not can be judged by analyzing whether the data fed back by the two sensors 230 are consistent or not, and if the detected data are inconsistent, rechecking or shutdown alarm prompting is carried out.

Before the sensor 203 is used, the threshold value of the sensor is set, the sensor 203 is firstly installed at a working position, and two round pipes 8 are found for debugging, wherein one round pipe has an internal thread, and the other round pipe does not have the internal thread. Referring to the use chart, the brightness switch is adjusted to the L bright through gear, the potentiometer is adjusted, and meanwhile, the orange switching value state indicating lamp is observed, so that the indicating lamp is bright when the threaded surface is irradiated, the indicating lamp is bright when the unthreaded surface is irradiated, the indicating lamp is qualified when the indicating lamp is not bright, the indicating lamp is defective when the indicating lamp is not bright, and then subsequent sorting work is carried out. The output form of the switching value output by the WT100L-E1141 sensor is NPN type, the switching value output is in high and low level form, the switching value output can be read and identified by a common single chip, and the single chip does not need to analyze complex detection data, and the electric signal generated by the sensor photosensitive element can be automatically converted into high and low level signals in the sensor according to a preset threshold value of photosensitive intensity, that is, the electric signal is directly output in 0/1 form. The workload of the singlechip can be reduced. The WT100L-E1141 sensor has a switching frequency of 2000Hz, a response time of less than 0.25ms, i.e., 0.25ms, can output a set of high and low level signals, and is particularly fast in detection speed and suitable for detecting high-speed moving objects.

The utility model provides an anticollision roof beam pipe internal thread detection device before automobile body, includes feed mechanism 1, letter sorting mechanism 2, main body frame 3, reset system, non-defective products fortune material dolly 51 and substandard product fortune material dolly 52.

Feeding mechanism

As shown in fig. 11 and 12, the feeding mechanism 1 includes a feeding bracket 101, a material box 102 and a feeding electromagnet 103, the material box 102 is mounted on the feeding bracket 101, the feeding bracket 101 is mounted on the main body frame 3,

the feed box 102 is a cylindrical structure and is provided with a feeding port 106 and a discharging port 105, wherein the opening of the feeding port 106 is larger, the opening of the discharging port 105 is smaller, the opening shape of the discharging port 105 is matched with the external dimension of the round tube 8, only one round tube 8 can pass through the discharging port 105 at one time,

and a fixed bracket 104 for mounting the feeding electromagnet 103 is arranged on the outer side of the feed opening 105.

And (3) analyzing a feeding principle: according to the knowledge of the magnetization of electromagnetism, the magnetization effects of the electromagnet on the round bar and the round pipe are quite different. The side surface of the round bar is magnetized by an electromagnet, the magnetic poles of the round bar are separated according to a section passing through the axis, and generally display N poles, generally S poles; if the side surface of the circular tube is magnetized by the electromagnet, the N/S poles of the circular tube are as shown in FIG. 13, the inner circle is S (N) and the outer circle is N (S). According to this principle, the electromagnet of the loading mechanism is arranged as shown in fig. 13, and the loading electromagnet 102 attracts the round tube 8 to be detected so as not to fall. Meanwhile, the feeding electromagnet 102 and the sorting electromagnet 215 show the same magnetism, and the magnetization effect on the two circular tubes 8 is also the same. The same polarity is shown in the pipe 8 outside, and according to the principle that like poles repel each other, will produce repulsion between the two, is similar to the principle of magnetic suspension, can reduce below pipe 8 when rotating with the friction of top pipe for rotate more steadily, also be favorable to the noise elimination.

The cooperative working process of the electromagnet comprises the following steps: when the loading electromagnet 102 is started, the loading electromagnet is electrified, and meanwhile, the sorting disc 204 is rotated and reset; then, the round tube 8 is put into the feed box 102, and the round tube 8 in the feed box 102 cannot fall into the sorting mechanism because the feeding electromagnet 102 is electrified; when feeding, the feeding electromagnet 102 is powered off, and the sorting electromagnet 215 is powered on; when the sensor 203 detects the threads, the feeding electromagnet 102 is electrified again to attract the round tube 8 to be detected in the material box 102, so that the rotation resistance of the sorting disc 204 is reduced; the sorting electromagnets 215 are de-energized at the respective stations to complete the sorting task. In this way, the circular movement is repeated until the circular tubes 8 in the magazine 102 are sorted.

Has the advantages that: 1. according to the principle that like poles repel each other, the rotation resistance can be reduced, and the round pipe to be detected cannot fall down; 2. whether the round tube 8 exists in the material box 102 can be judged through the change of the electrified current of the feeding electromagnet 102, the physical principle can be explained by referring to an energy method, when the electromagnet attracts the round tube 8, a load is added in a circuit, the round tube 8 is acted, the function conversion of the circuit of the electromagnet is different when the circuit has the load and does not have the load, the converted work is different, the voltage is constant, and the current can be changed; 3. the residual magnetism of the electromagnet during sudden power failure is very small and can be ignored, the electric response speed is very high, and the instantaneous release of the circular tube 8 during the power failure of the electromagnet can be realized.

Design of the bin

The work bin 102 is suitably made of sheet metal, depending on the function and working of the work bin 102. Since the tank 102 also has electromagnets on it, the problem that the tank 102 cannot be magnetized by the electromagnets should also be considered. In combination with the above problems, the material of the bin 102 is made of bent stainless steel sheet, and 304 austenitic stainless steel which cannot be magnetized is selected.

Sorting mechanism

The traditional device generally supplies and sorts materials by means of the air cylinder, and after the material pushing cylinder pushes the materials out, if the upper-layer materials fall, the return stroke of the material pushing cylinder is affected. Before the material pushing cylinder pushes materials, the material pushing cylinder firstly moves to push upper-layer materials adjacent to bottom-layer materials to be pushed, and the upper-layer materials are pushed against by the material pushing cylinder, and the positive pressure applied to second materials from bottom to top by the material pushing cylinder is extruded with the wall of the silo to generate friction force, so that the falling tendency of the upper-layer materials due to the influence of gravity is resisted.

If the action of the material pushing cylinder is too slow, the sorting speed can be influenced, if the speed is too fast, the momentum is equal to the product of the mass and the speed, the speed change is increased, the time is also reduced, the impulse of the cylinder is also increased, and the cylinder has larger impact force on the material. The impact force is too large, which may cause certain damage to the material and generate larger noise. And the use of a cylinder makes the entire system itself noisy. Noise, impact, vibration, cylinder blow-out, etc., are accompanied by a loss of energy.

Novel sorting mode

Fig. 6 and 7 show the novel sorting scheme of the device.

The sorting mechanism 2 comprises a sorting bracket 201, a detection switch 203, a sorting disc 204, a sorting electromagnet 215 and a driving motor 205,

the sorting tray 204 has a rotating shaft 2041, is rotatably disposed on the sorting bracket 201, is driven to rotate by a driving motor 205 mounted on the sorting bracket 201 through a motor mounting seat 206,

the outer side surface of the sorting disc 204 is inwards recessed along the radial direction to form a plurality of grooves 2042 for accommodating the round tubes 8, the sorting disc 204 is provided with electromagnet mounting holes 2043 which are corresponding to the grooves 2042 one by one and used for mounting the sorting electromagnets 215,

the detection switch 203 is mounted on the sorting bracket 201 through the detection switch bracket 202.

The sorting mechanism 2 further comprises an electromagnet mounting rack 211, the electromagnet mounting rack 211 is provided with an electromagnet mounting plate 213 with the shape and the position corresponding to the electromagnet mounting holes 2043 one by one, and is provided with a round hole 212,

the rotating shaft 2041 penetrates through the circular hole 212, and the electromagnet mounting plate 213 is provided with a sorting electromagnet 215 and then is inserted into the electromagnet mounting hole 2043.

The traditional sorting mode is innovatively changed by the device, the mechanical structure of the revolver is used for reference, the electromagnet is powered on and powered off along with the rotation of the sorting disc 204, and the circular tube 8 is conveyed and released at the corresponding position.

This device is with reference to the place that traditional side pressed, when than following square electromagnet to pipe 8 attraction, feed mechanism 1 department electromagnet can attract the top work piece, makes the top work piece whereabouts at suitable opportunity. The circular tubes 8 are conveyed to the defective product and qualified product bins 102 by means of rotation of the sorting tray, flexible impact-free conveying is achieved, noise is avoided, and extremely large impact on the objects is avoided. And the sorting tray 204 continuously rotates towards one direction, so that the next workpiece can be detected while other workpieces are conveyed, and the sorting efficiency is greatly improved. The electric response speed is much faster than the air cylinder, which is another advantage of improving the sorting speed.

Sorting tray material selection

The circular tube 8 is made of ferromagnetic material, and the electromagnet can attract the circular tube. Sorting tray 204 cannot be made of ferromagnetic material because the electromagnet is installed on sorting tray 204, if the electromagnet is electrified, and if the electromagnet can also magnetize sorting tray 204, sorting tray 204 will have magnetism, and sorting tray 204 can not accomplish normal sorting by attracting circular tube 8 on sorting tray 204 that does not need to be attracted.

The material that this device letter sorting dish 204 chose for use is 4032 aluminum alloy, chooses for use the aluminum alloy just can avoid letter sorting dish 204 by the influence of magnetization, and 4000 series aluminum alloy belongs to the aluminum alloy that contains silicon content more, and the hardness is higher, and low melting point, corrosion resistance are better, have heat-resisting, wear-resisting characteristics, are fit for being applied to this device to the frequent letter sorting work of pipe 8.

Combining practical experience and overall situation, the rotating speed of the sorting disc 204 is set to be n =1/3 r/s, namely the sorting disc 204 rotates for one turn in three seconds, a workpiece is sorted in about 0.5s, the centrifugal force of the circular tube 8 is calculated according to the parameters, and a proper electromagnet is selected: in order to ensure that the circular tube 8 has a more proper magnetic field environment, the stability of the electromagnet when attracting the circular tube 8 is better, the overall size of the electromagnet is selected to be close to the diameter of the circular tube 8 and not to exceed the diameter of the circular tube 8, therefore, the electromagnet is selected to be of a CS-P30/22 type, and the diameter of the adsorption surface is phi 14.

Selection of motor model

Preferably, the driving motor 205 is a stepping motor. The drive motor 205 is coaxially connected to the rotary shaft 2041 via a coupling 207.

The rotation and sorting of the sorting mechanism 2 need to control the rotation speed of the sorting tray 204, and also need to know the angle parameter at each moment, and there are two common motors which are commonly used at present and can control the rotation speed and the angle, one is a servo motor, and the other is a stepping motor. The output torque of the stepping motor is reduced along with the increase of the rotating speed, and is rapidly reduced at a higher rotating speed, so that the highest working rotating speed is generally 0-900 RPM; the rated rotation speed of the AC servo motor is generally 1000-3000 RPM. The rotating speed of the sorting mechanism is not high, and the sorting mechanism is suitable for using a stepping motor. The servo motor is mostly applied to the engineering problem of large torque. The stepping motor can be also called as a pulse motor, the rotating angle can be directly and accurately controlled through the number of input pulses, the actual application of small-sized engineering is realized, and the control mode of the stepping motor is simpler. To sum up, the sorting mechanism is suitably controlled using a stepper motor.

Through the comparison of the parameters of the stepping motors of various models and the degree of economy, the 57-series stepping motor is selected for the sorting device. The torque of the 57 stepping motor is 1.2N.m, the calculated torque requirement is met, the step angle is 1.8 degrees, namely 200 steps are needed for the rotation of the 1.8-degree two-phase stepping motor for one circle, the working position angles of the sorting device are multiples of 60 degrees and multiples of 1.8 degrees, and the accurate rotating position can be achieved by controlling the 57 stepping motor.

Main body frame

Fig. 10 shows the table main body frame 3. The main body frame 3 comprises supporting legs 301, angle steel 302, a foot cup 303 and a diagonal draw beam 304,

the lower side of the supporting leg 301 is provided with a foot cup 303, the inclined tension beam 304 is arranged at the middle position of the main body frame 3, and the angle steel 302 is fixedly arranged at the upper side position of the main body frame 3.

The workbench main body frame 3 of the device for detecting the internal thread of the round pipe of the front anti-collision beam of the automobile body plays a role in installing the feeding mechanism 1 and the sorting mechanism 2, and the mutual position requirements of the feeding mechanism 1 and the sorting mechanism 2 are also completed by the design and the construction of the main body frame 3. The main body frame is mainly completed by welding, the rigidity and stability of the main body frame can be ensured by welding, and other equipment is arranged on the main body frame 3. The oblique draw beam 304 in the main body frame 3 can strengthen the rigidity of the whole frame, and can play a role in limiting the position of the material conveying trolley for containing the round tubes 8 after sorting, so that the round tubes 8 are positioned in the bilateral symmetry position, and the round tubes 8 can be accurately fallen into the left and right symmetrical position.

The main body frame 3 is made of standard parts such as square tubes and angle irons, and the standard parts can save money and facilitate processing, and can be used for ensuring the integral weight and the structural strength. In actual work, the uneven ground at the installation place can influence the work of the sorting equipment, so that the four foot cups 303 are arranged at the four legs of the frame, and the workbench can be adjusted to be horizontal during installation. The selected foot cup 303 can bear 1.5 tons, and the actual bearing requirement of the equipment can be met.

Reset system

The reset system comprises a U-shaped photoelectric switch 209 and a reset detection sheet 208,

the reset detection sheet 208 is mounted on the sorting tray 204 and comprises three parts, wherein the first part is a reset deceleration position 2081, the second part indicates a zero stopping position 2083, and a detection vacancy 2082 is formed in the middle;

the U-shaped photoelectric switch 209 is mounted on the sorting bracket 201, and the reset deceleration position 2081, the detection vacancy 2082 and the zero stopping position 2083 sequentially pass through a light beam transmission route of the U-shaped photoelectric switch 209 in the rotation process of the sorting tray 204.

Preferably, the reset detecting piece 208 is integrally formed with the electromagnet mounting plate 213 of the electromagnet mounting bracket 211.

The sorting tray 204 only controls the rotation angle, but does not determine the initial position, so that the round tube 8 cannot be precisely controlled to reach the accurate position. This is because, for example, knowing the acceleration, knowing the velocity at zero time or at a known time, it is not possible to calculate the velocity of the object at any time from the acceleration. The zero position needs to be known during one revolution of the sorting tray 204, and the control system knows that it has made one full revolution per revolution.

Although it can be known whether a 360 rotation has occurred by counting the number of pulses, this is only an open loop control system. The open-loop control of the stepping motor has other disadvantages, and when the starting frequency is too high or the load is too large, the phenomenon of step loss or rotation blockage is easy to occur, so other mechanical structures besides a control program are necessary to check and correct the position of the stepping motor. Only one reset system is required, and both the zero position of the sorting tray 204 and whether it has rotated 360 degrees can be determined.

The U-shaped photoelectric switch 209 is the correlation photoelectric sensor introduced above, the emitter and the receiver are not on the same side, the reset detection sheet 208 moves to the same side to directly block the light beam irradiated by the emitter, and the receiver cannot receive the light signal of the emitter and then outputs an electric signal of a switching value to indicate that the blocking exists at the moment. The reset detection piece 208 is designed into three parts, wherein the first part is a reset deceleration position 2081, the second part indicates a zero stop position 2083, and a detection vacancy 2082 is arranged in the middle. The reason for setting the reset deceleration position 2081 is that the rotating device can rotate quickly when being reset when being started, so as to rotate and reset at the fastest speed, but the rotating device needs to decelerate instantaneously when reaching the zero position, and the faster the speed is due to inertia, the larger the impact force on the stepping motor during deceleration is, and the sudden change of the speed can cause the stepping motor to lose step, so that the zero position is reached but exceeds the zero position due to inertia impact. And because the stepping motor is controlled in an open loop mode, the stepping motor cannot know that the stepping motor deviates from the zero position, the machine can move in a false zero position, and the sorting position precision can be greatly influenced. The controller can be informed in advance by adding a deceleration position before the zero position, the zero position is reached immediately, the speed of the stepping motor is reduced to a proper value in advance, and then the rotating device can be accurately stopped at the zero position when the stepping motor receives a signal triggered by the U-shaped photoelectric switch 209 triggered by the zero position again.

The device has the advantages that the rotating speed can be faster when the reset is ensured, the rotating device can be decelerated in advance before reset, the problem of inaccurate reset caused by inertia is avoided, and the reset precision and speed are greatly improved.

Rotating system power supply solution

The sorting mechanism 2 further comprises a rotary conductive ring 210, and the rotary conductive ring 210 is sleeved on the rotating shaft 2041.

The letter sorting dish of rotational system needs to carry out 360 rotations, and the pipe 8 will be adsorbed to the electro-magnet, drives pipe 8 and carries out 360 rotations. The electromagnet must be attached to the platter 204 and rotate with the platter 204, which may present a problem with how the platter 204 is powered. Ordinary wire connection supplies power, and if 360 degrees of rotation are carried out, the wire is necessarily twisted continuously in one direction, and then knotted and cannot rotate any more.

In view of the above problems, a solution is proposed that employs a rotating conductive slip ring 210. According to the practical requirement of the scheme, the Mobilong conductive slip ring with the inner diameter of 20mm, 8-path input and 8-path output is selected. The reason for selecting eight ways is that six sorting electromagnets 215 are uniformly distributed on the sorting disc 204, the positive pole and the negative pole of two lines of one electromagnet are controlled independently, the electrification and the outage of the electromagnet are controlled independently, so that each electromagnet can take out the collinear line of the lines with the same polarity, the rest lines of the electromagnet can be controlled independently, seven lines are needed in total, the model of the conductive slip ring is searched, and the most close conductive slip ring of eight ways is selected.

The working principle of the rotary conductive slip ring is similar to that of a motor brush, the conductive slip ring is divided into a stator and a rotor, one end of the rotor is connected with a sorting disc, the rotor is fixed with the sorting disc through four set screws, and the stator is fixedly connected with a rack. The stator and the rotor are electrified through the alloy electric brush.

The rated current of the MT2069 type rotating conductive slip ring can bear 10A, the actual working current of the electromagnet is about 3A, and the requirement of corresponding voltage and current can be met; the highest bearing rotating speed can reach 250RPM, and the working requirement is met; the torque is 0.02N.m, which meets the selection requirement of the motor. The input and output of the motor are respectively provided with seven lines, one public end and six output lines which are connected with six electromagnetic relays, and the connection and disconnection of the corresponding motor are further controlled by control signals sent to the relays by the singlechip.

Material conveying trolley

The conveying trolley comprises a good product conveying trolley 51 and a defective product conveying trolley 52 which are identical in structure, wherein the good product conveying trolley 51 is provided with a container 511 with an upper opening, the lower side of the container 511 is provided with a roller 513, and the side surface of the container 511 is provided with a handle 512.

The main body of the material conveying trolley is formed by welding five-millimeter-thick steel plates, and two trolleys are placed at the position of a qualified product and at the position of a defective product. The rear caster wheel has a braking function, and the rear wheel is braked after the trolley is placed at the diagonal angle iron position of the workbench main body frame, so that the position of the trolley is fixed.

As shown in fig. 16, a flow chart of the entire sorting process is shown.

It will be appreciated that although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The feeding and sorting mechanism for the round pipe of the front anti-collision beam of the vehicle body is characterized by comprising a feeding mechanism (1) and a sorting mechanism (2);

a plurality of round tubes (8) of materials to be detected are stored in the feeding mechanism (1) and are fed to the sorting mechanism (2), the sorting mechanism (2) screens the round tubes (8),

the feeding mechanism (1) comprises a feeding support (101), a material box (102) and a feeding electromagnet (103), the material box (102) is arranged on the feeding support (101), the feeding support (101) is arranged on the main body frame (3),

the feed box (102) is of a cylinder structure and is provided with a feeding port (106) and a discharging port (105), wherein the opening of the feeding port (106) is larger, the opening of the discharging port (105) is smaller, the opening shape of the discharging port (105) is matched with the overall dimension of the circular tube (8), only one circular tube (8) can pass through the discharging port (105) at one time,

a fixed support (104) for mounting a feeding electromagnet (103) is arranged on the outer side of the feed opening (105);

the sorting mechanism (2) comprises a sorting bracket (201), a detection switch (203), a sorting disc (204), a sorting electromagnet (215) and a driving motor (205),

the sorting disc (204) is provided with a rotating shaft (2041), is rotatably arranged on the sorting bracket (201) and is driven to rotate by a driving motor (205) which is arranged on the sorting bracket (201) through a motor mounting seat (206),

the upper outer side surface of the sorting disc (204) is inwards recessed along the radial direction to form a plurality of grooves (2042) for containing the round tubes (8), electromagnet mounting holes (2043) which correspond to the grooves (2042) one by one and are used for mounting sorting electromagnets (215) are formed in the sorting disc (204),

the detection switch (203) is arranged on the sorting bracket (201) through the detection switch bracket (202).

2. The round pipe feeding and sorting mechanism for the front anti-collision beam of the vehicle body according to claim 1, characterized in that the sorting mechanism (2) further comprises an electromagnet mounting rack (211), the electromagnet mounting rack (211) is provided with an electromagnet mounting plate (213) which is in one-to-one correspondence with the electromagnet mounting holes (2043) in shape and position and is provided with a round hole (212),

the rotating shaft (2041) penetrates through the round hole (212), and the electromagnet mounting plate (213) is provided with a sorting electromagnet (215) and then is inserted into the electromagnet mounting hole (2043).

3. The round tube feeding and sorting mechanism for the front anti-collision beam of the vehicle body according to claim 1, characterized by further comprising a reset system, wherein the reset system comprises a U-shaped photoelectric switch (209) and a reset detection sheet (208),

the reset detection sheet (208) is arranged on the sorting tray (204) and comprises three parts, wherein the first part is a reset deceleration position (2081), the second part indicates a zero stopping position (2083), and a detection vacancy position (2082) is arranged in the middle;

the U-shaped photoelectric switch (209) is arranged on the sorting bracket (201), and the reset deceleration position (2081), the detection vacancy (2082) and the zero stopping position (2083) sequentially pass through a light beam transmission route of the U-shaped photoelectric switch (209) in the rotating process of the sorting disc (204).

4. The round tube feeding and sorting mechanism for the front anti-collision beam of the vehicle body as claimed in claim 3, wherein the reset detection sheet (208) is integrally formed with the electromagnet mounting plate (213) on the electromagnet mounting frame (211).

5. The vehicle body front anti-collision beam circular tube feeding and sorting mechanism according to claim 1, characterized in that the sorting mechanism (2) further comprises a rotary conductive ring (210), and the rotary conductive ring (210) is sleeved on the rotating shaft (2041).

6. The feeding and sorting mechanism for the round tubes of the front anti-collision beam of the vehicle body according to claim 1, wherein the two detection switches (203) are arranged symmetrically left and right.

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