Pneumatic steel ball sorting module for PLC teaching and training and its assessment method

Abstract

The pneumatic steel ball sorting module for PLC teaching and training and its assessment method include a mounting plate, a steel ball blanking component, a steel ball specification determination component, a steel ball classification and collection component and a PLC control unit; the steel ball blanking component pushes the steel ball into the steel ball specification determination component through a slide cylinder, the steel ball specification determination component is provided with a step groove, each step of the step groove is provided with a photoelectric switch, and the steel ball specification is determined according to the blocking of the photoelectric switch, the step groove is connected to the flip cylinder, the steel ball classification and collection component is provided with a slideway, a rotating baffle, and a receiving box, the steel ball enters the slideway from the step groove after the flip cylinder drives the flip, the rotating baffle is driven by the push-pull cylinder, and the steel ball is guided into the corresponding receiving box through the rotating baffle, and the push-pull cylinder, the flip cylinder, all the photoelectric switches, and all the push-pull cylinders are electrically connected to the PLC control unit. During the assessment, the steel balls are accurately sorted and put into the corresponding receiving box according to the edited PLC program, and the assessment is passed, otherwise the assessment fails.

Description

Technical Field

[0001] The invention relates to a pneumatic steel ball sorting module for PLC teaching and training and an assessment method thereof. Background Art

[0002] PLC, or programmable logic controller, is an electronic system that performs digital computing operations and is designed specifically for industrial environments. In the field of industrial control, the application of PLC control technology has already taken a dominant position.

[0003] At present, the mechanical and electrical engineering majors in domestic universities all offer PLC-related courses, and relevant PLC teaching and training rooms have been added for this course to enable students to combine theory with practice; however, most of the current PLC teaching and training equipment only focuses on the basic theoretical understanding and basic programming operations of PLC, and cannot meet the complex programming and control needs of PLC in industrial production. Summary of the invention

[0004] The first technical problem to be solved by the present invention is to provide a pneumatic steel ball sorting module for PLC teaching and training, which can control the cylinder action therein through a suitable PLC program to complete the sorting of steel balls and make different types of steel balls fall into corresponding receiving boxes respectively.

[0005] The second technical problem to be solved by the present invention is to provide an assessment method for the above-mentioned pneumatic steel ball sorting module for PLC teaching and training. Through this method, it can be judged whether the PLC program written by the operator to be assessed meets the requirements, thereby assessing his or her mastery of PLC control technology.

[0006] To solve the above-mentioned first technical problem, the present invention provides a pneumatic steel ball sorting module for PLC teaching and training, comprising a mounting plate, and a steel ball blanking assembly, a steel ball specification determination assembly, a steel ball classification and collection assembly and a PLC control unit arranged on the upper side of the mounting plate;

[0007] The steel ball dropping assembly comprises a steel ball hopper, a steel ball channel for sequentially dropping steel balls is provided at the lower side of the steel ball hopper, a horizontally arranged support plate is provided at the lower side of the steel ball channel, the lower side of the support plate is connected to the mounting plate through a profile support column, a horizontally arranged slide cylinder is also provided on the support plate, a steel ball push plate is provided on the slide cylinder, a through hole is provided on the steel ball push plate for passing the steel balls, a channel is provided at the lower part of the side wall of the steel ball channel for reciprocating motion of the steel ball push plate, the through hole on the steel ball push plate in the contracted state of the slide cylinder is directly opposite to the steel ball channel, and a dropping hole for dropping the steel balls is provided at the position of the through hole on the steel ball push plate in the extended state of the slide cylinder corresponding to the support plate;

[0008] The steel ball specification determination component includes a steel ball positioning groove, a flip cylinder, and a flip bracket. The steel ball positioning groove is connected to the flip cylinder through the flip bracket, and the flip cylinder is connected to the mounting plate through the cylinder fixing support frame. The steel ball positioning groove is a vertically arranged N-step stepped groove with an open upper side. The upper side opening of the steel ball positioning groove is directly opposite to the blanking hole. The width of each step of the stepped groove decreases from top to bottom, and a corresponding photoelectric switch is provided in each step of the stepped groove.

[0009] The steel ball classification and collection assembly comprises a long steel ball slide, N-1 material blocking assemblies and N material receiving boxes. The steel ball slide is arranged obliquely, and the side with a higher height in the length direction of the steel ball slide is set as the head, and the other side is set as the tail. The head of the steel ball slide is directly opposite to the lower side of the steel ball positioning groove after flipping. Baffles are provided on both sides of the steel ball slide in the width direction, and each baffle is provided with N-1 notches, and the notches on the two baffles are in a one-to-one corresponding position relationship. For any two relatively arranged notches: a material blocking assembly is provided at one of the notches, and a material receiving box is provided at the other notch, and a material receiving box is provided at the tail of the steel ball slide;

[0010] The material baffle assembly includes a rotating baffle, a push-pull cylinder, and a horizontal mounting block. The rotating baffle is arranged vertically. The rotating baffle is an L-shaped plate, which includes a long side and a short side. The junction of the long side and the short side is fixed to the mounting block through a rotating shaft. The long side of the rotating baffle matches the corresponding notch, and after the long side rotates around the rotating shaft, the end of the long side away from the rotating shaft is close to the lower edge of the notch on the opposite side baffle. The push-pull cylinder is horizontally arranged on the mounting block, and a cylinder fixing seat is provided on the mounting block. A cylinder tail seat is provided at the rear of the push-pull cylinder, and the cylinder tail seat is hinged to the cylinder fixing seat and the axial direction of the hinge shaft is vertical. A floating joint is provided at the head of the push-pull cylinder, and the floating joint is hinged to the short side of the rotating baffle and the axial direction of the hinge shaft is vertical.

[0011] The push-pull cylinders, the flip cylinders, all the photoelectric switches, and all the push-pull cylinders are electrically connected to the PLC control unit.

[0012] For the purpose of simple explanation, the pneumatic steel ball sorting module for PLC teaching and training described in the present invention is referred to as this module below.

[0013] Advantages of this module: This module has a simple structure and can control the cylinder action through a suitable PLC program to complete the sorting of steel balls and make different types of steel balls fall into the corresponding receiving boxes. The whole process tests multiple key control operations in PLC programming, such as control action, result judgment, and delay action.

[0014] In order to achieve better use effect of this module, the preferred scheme is as follows:

[0015] Preferably, the mounting plate is provided with two U-shaped handles which are arranged opposite to each other.

[0016] The U-shaped handle makes it easy to carry the entire module.

[0017] Preferably, the mounting plate is provided with a plurality of waist-shaped holes arranged in a matrix, and the steel ball blanking assembly, the steel ball specification determination assembly, and the steel ball classification and collection assembly are all connected to the mounting plate via bolts that cooperate with the waist-shaped holes.

[0018] The waist-shaped holes on the mounting plate are used to position and install each component on the mounting plate, and due to the easy-to-adjust feature of the waist-shaped holes, the relative position relationship of multiple components can be easily adjusted.

[0019] Preferably, a steel ball placement box is provided on the mounting plate.

[0020] When this module is out of use, the steel balls can be temporarily stored in the steel ball storage box to prevent loss and facilitate storage.

[0021] In order to solve the above second technical problem, the present invention provides an assessment method for a pneumatic steel ball sorting module for PLC teaching and training, comprising the following steps:

[0022] (1) The examiner divides the steel balls into N categories according to their diameters, so that the diameter of each category of steel balls corresponds to the width of each step in the stepped groove, and then the N categories of steel balls correspond to the N receiving boxes one by one;

[0023] (2) The operator to be assessed controls the following processes by writing a PLC program:

[0024] a. The initial position of the slide cylinder is in the contracted state. The through hole on the steel ball push plate is directly opposite to the steel ball material channel. The steel ball at the bottom of the steel ball material channel falls into the through hole. At this time, the slide cylinder is controlled to push the steel ball push plate. The steel ball falling into the through hole moves with the push plate. When the slide cylinder reaches the extended state, the through hole of the steel ball push plate coincides with the blanking hole on the support plate, and the steel ball in the steel ball push plate falls from the blanking hole to the steel ball positioning groove;

[0025] b. The steel ball falls in the steel ball positioning groove in sequence until it falls into the groove with a width equal to its diameter. At the same time, the corresponding photoelectric switch is blocked, and the blocked photoelectric switch signal is collected to determine the diameter of the falling steel ball;

[0026] c. Start the flip cylinder and put the steel ball in the steel ball positioning groove into the steel ball slide from the head of the steel ball slide. The steel ball slides freely from high to low in the steel ball slide. At this time, the action of the material blocking assembly is controlled according to the diameter of the steel ball determined in step b. If the position of the receiving box corresponding to the diameter of the steel ball is on both sides of the width direction of the steel ball slide, the push-pull cylinder on the opposite side of the corresponding receiving box is controlled to extend, and at the same time, the rotating baffle is forced to rotate along the rotating shaft, and the end of the long side of the rotating baffle away from the rotating shaft is close to the lower edge of the notch on the opposite baffle, and the push-pull cylinders of other material blocking assemblies remain in the initial state of contraction. At this time, the freely sliding steel ball enters the corresponding receiving box under the guidance of the long side of the rotating baffle; if the position of the receiving box corresponding to the diameter of the steel ball is in the receiving box at the tail of the steel ball slide, the push-pull cylinders of all material blocking assemblies are controlled to remain in the initial state of contraction, and the freely sliding steel ball will fall directly into the receiving box at the tail of the steel ball slide;

[0027] d. Repeat the above steps until the sorting is completed;

[0028] (3) Steel balls of different diameters to be sorted are placed into a steel ball silo, and then the cylinder is controlled by a PLC program that is portable to the operator to be tested. If each type of steel ball is accurately sorted and placed into the corresponding receiving box, the test is passed, otherwise the test fails.

[0029] For the purpose of simple explanation, the assessment method of the pneumatic steel ball sorting module for PLC teaching and training described in the present invention is referred to as this method below.

[0030] Advantages of this method: Through this method, it can be judged whether the PLC program written by the operator to be assessed meets the requirements, thereby assessing his or her mastery of PLC control technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is the structural diagram of this module;

[0032] Figure 2 It is a schematic diagram of the structure of the mounting plate in this module;

[0033] Figure 3 It is a schematic diagram of the structure of the steel ball blanking assembly in this module;

[0034] Figure 4 This is a schematic diagram of the structure of the steel ball specification determination component in this module;

[0035] Figure 5 This is a schematic diagram of the structure of the steel ball classification and collection component in this module;

[0036] Figure 6 It is a structural schematic diagram of the material retaining component in the steel ball classification and collection component. DETAILED DESCRIPTION

[0037] See also Figure 1-Figure 6 , a pneumatic steel ball sorting module for PLC teaching and training, comprising a mounting plate 4, and a steel ball dropping assembly 1, a steel ball specification determination assembly 2, a steel ball classification and collection assembly 3 and a PLC control unit (the PLC control unit is not shown in the figure) arranged on the upper side of the mounting plate 4;

[0038] The mounting plate 4 is provided with two U-shaped handles 41 arranged opposite to each other and a steel ball placing box 5. The mounting plate 4 is provided with a plurality of waist-shaped holes 42 arranged in a matrix, and the steel ball blanking assembly 1, the steel ball specification determination assembly 2, and the steel ball classification and collection assembly 3 are all connected to the mounting plate 4 through bolts matched with the waist-shaped holes 42 (the matching of the waist-shaped holes 42 and the bolts is a conventional structure in the mechanical field, which will not be described in detail in this article).

[0039] The steel ball blanking assembly 1 includes a waist-shaped steel ball silo 12, a steel ball channel 16 for sequentially dropping steel balls is provided at the lower side of the waist-shaped steel ball silo 12, a horizontally arranged support plate 13 is provided at the lower side of the steel ball channel 16, the lower side of the support plate 13 is connected to the mounting plate 4 through a profile support column 14, a horizontally arranged slide cylinder 11 is also provided on the support plate 13, a steel ball push plate 15 is provided on the slide cylinder 11, a through hole 151 is provided on the steel ball push plate 15 for steel balls to pass through, a channel for reciprocating motion of the steel ball push plate 15 is provided at the lower part of the side wall of the steel ball channel 16, the through hole 151 on the steel ball push plate 15 in the contracted state of the slide cylinder 11 is directly opposite to the steel ball channel 16, and a blanking hole for steel balls to fall is provided at the position of the through hole 151 on the steel ball push plate 15 in the extended state of the slide cylinder 11 corresponding to the support plate 13 (the blanking hole is at Figure 2 Not shown, its actual location is Figure 2 directly below the middle through hole 151);

[0040] The steel ball specification determination component 2 includes a steel ball positioning groove 23, a flip cylinder 21, and a flip bracket 22. The steel ball positioning groove 23 is connected to the flip cylinder 21 through the flip bracket 22, and the flip cylinder 21 is connected to the mounting plate 4 through the cylinder fixing support frame 28. The steel ball positioning groove 23 is a vertically arranged N-step stepped groove with an open upper side (this embodiment takes a three-step stepped groove as an example, and the following description is based on the three-step stepped groove. The corresponding grades are also small, medium, and large steel balls, which are recorded as 25 / 26 / 27 respectively). The upper side opening of the steel ball positioning groove 23 is opposite to the blanking hole, and the width of each step of the stepped groove decreases from top to bottom. Each step 231 of the stepped groove is provided with a corresponding photoelectric switch 24;

[0041] The steel ball classification and collection component 3 comprises a long steel ball slide 33, two material blocking components 36 (A / B) and three material receiving boxes 32 / 34 / 35. The steel ball slide 33 is arranged obliquely, and the side with a higher height in the length direction of the steel ball slide 33 is set as the head, and the other side is set as the tail. The head of the steel ball slide 33 is directly opposite to the lower side of the steel ball positioning groove 23 after flipping. Baffles are provided on both sides of the steel ball slide 33 in the width direction, and each baffle is provided with two notches, and the notches on the two baffles are in a one-to-one corresponding position relationship. The left notch of the front baffle is provided with a material blocking component 36A, and the right notch is provided with a material blocking component 36B. The left notch of the rear baffle is provided with a small steel ball receiving box 32, and the right notch is provided with a medium steel ball receiving box 34. A large steel ball receiving box 35 is provided at the tail of the steel ball slide 33.

[0042] The baffle assembly 36 includes a rotating baffle, a push-pull cylinder 364, and a horizontal mounting block 367. The rotating baffle is arranged vertically. The rotating baffle is an L-shaped plate, which includes a long side 361 and a short side 362. The junction of the long side 361 and the short side 362 is fixed to the mounting block 367 through a rotating shaft 363. The long side 361 of the rotating baffle matches the corresponding notch, and after the long side 361 rotates around the rotating shaft 363, the end of the long side 361 away from the rotating shaft 363 is aligned with the corresponding notch. The lower edges of the notches on the side baffles are close to each other, the push-pull cylinder 364 is horizontally arranged on the mounting block 367, the mounting block 367 is provided with a cylinder fixing seat 366, the tail of the push-pull cylinder 364 is provided with a cylinder tail seat 365, the cylinder tail seat 365 is hinged with the cylinder fixing seat 366, and the axial direction of the hinge axis is vertical, the head of the push-pull cylinder 364 is provided with a floating joint 368, the floating joint 368 is hinged with the short side 362 of the rotating baffle, and the axial direction of the hinge axis is vertical;

[0043] The push-pull cylinder 364, the flip cylinder 21, the three photoelectric switches 24, and the two push-pull cylinders 364 are all electrically connected to the PLC control unit.

[0044] Advantages of this module: This module has a simple structure and can control the cylinder action through a suitable PLC program to complete the sorting of steel balls and make different types of steel balls fall into the corresponding receiving boxes. The whole process tests multiple key control operations in PLC programming, such as control action, result judgment, and delay action.

[0045] The U-shaped handle 41 facilitates the transportation of the entire module.

[0046] The waist-shaped holes 42 on the mounting plate 4 are used for positioning and mounting each component on the mounting plate 4, and due to the easy-to-adjust feature of the waist-shaped holes 42, the relative positional relationship of multiple components can be easily adjusted.

[0047] When the module is not in use, the steel balls can be temporarily stored in the steel ball placement box 5 to prevent loss and facilitate storage.

[0048] The assessment method of the pneumatic steel ball sorting module for PLC teaching and training includes the following steps:

[0049] (1) The examiner divides the steel balls into three categories according to their diameters, so that the diameter of each type of steel ball corresponds to the width of each step in the stepped groove. Then the three types of steel balls are matched to the three receiving boxes; that is, small steel balls 25 enter receiving box 32, medium steel balls 26 enter receiving box 34, and large steel balls 27 enter receiving box 35.

[0050] (2) The operator to be assessed controls the following processes by writing a PLC program:

[0051] a. The initial position of the slide cylinder 11 is in a contracted state. The through hole 151 on the steel ball push plate 15 is directly opposite to the steel ball material channel 16. The steel ball at the bottom of the steel ball material channel 16 falls into the through hole 151. At this time, the slide cylinder 11 is controlled to push the steel ball push plate 15. The steel ball falling into the through hole 151 moves with the push plate. When the slide cylinder 11 reaches the extended state, the through hole 151 of the steel ball push plate 15 coincides with the blanking hole on the support plate 13, and the steel ball in the steel ball push plate 15 falls from the blanking hole into the steel ball positioning groove 23;

[0052] b. The steel ball falls in the steel ball positioning groove 23 in sequence until it falls into the first-order groove 231 whose groove width is equal to its diameter. At the same time, the corresponding photoelectric switch 24 is blocked, and the signal of the blocked photoelectric switch 24 is collected to determine the diameter of the falling steel ball;

[0053] c. Start the flip cylinder 21, and put the steel ball in the steel ball positioning groove 23 into the steel ball slide 33 from the head of the steel ball slide 33. The steel ball slides freely from high to low in the steel ball slide 33. At this time, according to the diameter of the steel ball determined in step b, the action of the material blocking component is controlled.

[0054] If the photoelectric switch 24 at the bottom is blocked, it is judged to be a small steel ball 25, and the push-pull cylinder 364 in the material blocking assembly 36A is controlled to extend, and at the same time, the rotating baffle is forced to rotate along the rotating shaft 363, and the end of the long side 361 of the rotating baffle away from the rotating shaft 363 is close to the lower edge of the notch on the opposite side baffle, and the push-pull cylinder 364 of the material blocking assembly 36B maintains the initial state of contraction. At this time, the freely sliding steel ball 25 enters the corresponding receiving box 32 under the guidance of the long side 361 of the rotating baffle;

[0055] If the photoelectric switch 24 of the middle layer is blocked, it is judged to be a medium-sized steel ball 26, and the push-pull cylinder 364 in the material blocking component 36B is controlled to extend, and at the same time, the rotating baffle is forced to rotate along the rotating shaft 363, and the end of the long side 361 of the rotating baffle away from the rotating shaft 363 is close to the lower edge of the notch on the opposite side baffle, and the push-pull cylinder 364 of the material blocking component 36A maintains the initial state of contraction. At this time, the freely sliding steel ball 26 enters the corresponding receiving box 34 under the guidance of the long side 361 of the rotating baffle;

[0056] If the photoelectric switch 24 on the top layer is blocked, it is judged to be a large steel ball 27, and the push-pull cylinder 364 controlling the material blocking assembly 36 (A / B) both maintains the initial state of contraction, and the freely sliding steel ball 27 will fall directly into the receiving box 35 at the tail of the steel ball slide 33;

[0057] d. Repeat the above steps until the sorting is completed;

[0058] (3) Steel balls of different diameters to be sorted are placed into the waist-shaped steel ball silo 12, and then the cylinder is controlled by a PLC program that is portable to the operator to be tested. If each type of steel ball is accurately sorted and placed into the corresponding receiving box, the test is passed, otherwise the test fails.

[0059] Advantages of this method: Through this method, it can be judged whether the PLC program written by the operator to be assessed meets the requirements, thereby assessing his or her mastery of PLC control technology.

Claims

1. PLC teaching and training pneumatic steel ball sorting module, characterized by: It includes a mounting plate, and a steel ball blanking assembly, a steel ball specification determination assembly, a steel ball classification and collection assembly, and a PLC control unit arranged on the upper side of the mounting plate; The steel ball dropping assembly comprises a steel ball hopper, a steel ball channel for sequentially dropping steel balls is provided at the lower side of the steel ball hopper, a horizontally arranged support plate is provided at the lower side of the steel ball channel, the lower side of the support plate is connected to the mounting plate through a profile support column, a horizontally arranged slide cylinder is also provided on the support plate, a steel ball push plate is provided on the slide cylinder, a through hole is provided on the steel ball push plate for passing the steel balls, a channel is provided at the lower part of the side wall of the steel ball channel for reciprocating motion of the steel ball push plate, the through hole on the steel ball push plate in the contracted state of the slide cylinder is directly opposite to the steel ball channel, and a dropping hole for dropping the steel balls is provided at the position of the through hole on the steel ball push plate in the extended state of the slide cylinder corresponding to the support plate; The steel ball specification determination component includes a steel ball positioning groove, a flip cylinder, and a flip bracket. The steel ball positioning groove is connected to the flip cylinder through the flip bracket, and the flip cylinder is connected to the mounting plate through the cylinder fixing support frame. The steel ball positioning groove is a vertically arranged N-step stepped groove with an open upper side. The upper side opening of the steel ball positioning groove is directly opposite to the blanking hole. The width of each step of the stepped groove decreases from top to bottom, and a corresponding photoelectric switch is provided in each step of the stepped groove. The steel ball classification and collection assembly comprises a long steel ball slide, N-1 material blocking assemblies and N material receiving boxes. The steel ball slide is arranged obliquely, and the side with a higher height in the length direction of the steel ball slide is set as the head, and the other side is set as the tail. The head of the steel ball slide is directly opposite to the lower side of the steel ball positioning groove after flipping. Baffles are provided on both sides of the steel ball slide in the width direction, and each baffle is provided with N-1 notches, and the notches on the two baffles are in a one-to-one corresponding position relationship. For any two relatively arranged notches: a material blocking assembly is provided at one of the notches, and a material receiving box is provided at the other notch, and a material receiving box is provided at the tail of the steel ball slide; The material baffle assembly includes a rotating baffle, a push-pull cylinder, and a horizontal mounting block. The rotating baffle is arranged vertically. The rotating baffle is an L-shaped plate, which includes a long side and a short side. The junction of the long side and the short side is fixed to the mounting block through a rotating shaft. The long side of the rotating baffle matches the corresponding notch, and after the long side rotates around the rotating shaft, the end of the long side away from the rotating shaft is close to the lower edge of the notch on the opposite side baffle. The push-pull cylinder is horizontally arranged on the mounting block, and a cylinder fixing seat is provided on the mounting block. A cylinder tail seat is provided at the rear of the push-pull cylinder, and the cylinder tail seat is hinged to the cylinder fixing seat and the axial direction of the hinge shaft is vertical. A floating joint is provided at the head of the push-pull cylinder, and the floating joint is hinged to the short side of the rotating baffle and the axial direction of the hinge shaft is vertical. The push-pull cylinder, the flip cylinder, all photoelectric switches, and all the push-pull cylinders are electrically connected to the PLC control unit; The mounting plate is provided with two U-shaped handles arranged opposite to each other; The mounting plate is provided with a plurality of waist-shaped holes arranged in a determinant pattern, and the steel ball blanking assembly, the steel ball specification determination assembly, and the steel ball classification and collection assembly are all connected to the mounting plate through bolts matching the waist-shaped holes; A steel ball placement box is arranged on the installation plate.

2. The assessment method of the pneumatic steel ball sorting module for PLC teaching and training according to claim 1 is characterized in that: The following steps are involved: (1) The examiner divides the steel balls into N categories according to their diameters, so that the diameter of each category of steel balls corresponds to the width of each step in the stepped groove, and then the N categories of steel balls correspond to the N receiving boxes one by one; (2) The operator to be assessed controls the following processes by writing a PLC program: a. The initial position of the slide cylinder is in the contracted state. The through hole on the steel ball push plate is directly opposite to the steel ball material channel. The steel ball at the bottom of the steel ball material channel falls into the through hole. At this time, the slide cylinder is controlled to push the steel ball push plate. The steel ball falling into the through hole moves with the push plate. When the slide cylinder reaches the extended state, the through hole of the steel ball push plate coincides with the blanking hole on the support plate, and the steel ball in the steel ball push plate falls from the blanking hole to the steel ball positioning groove; b. The steel ball falls in the steel ball positioning groove in sequence until it falls into the groove with a width equal to its diameter. At the same time, the corresponding photoelectric switch is blocked, and the blocked photoelectric switch signal is collected to determine the diameter of the falling steel ball; c. Start the flip cylinder and put the steel ball in the steel ball positioning groove into the steel ball slide from the head of the steel ball slide. The steel ball slides freely from high to low in the steel ball slide. At this time, the action of the material blocking assembly is controlled according to the diameter of the steel ball determined in step b. If the position of the receiving box corresponding to the diameter of the steel ball is on both sides of the width direction of the steel ball slide, the push-pull cylinder on the opposite side of the corresponding receiving box is controlled to extend, and at the same time, the rotating baffle is forced to rotate along the rotating shaft, and the end of the long side of the rotating baffle away from the rotating shaft is close to the lower edge of the notch on the opposite baffle, and the push-pull cylinders of other material blocking assemblies remain in the initial state of contraction. At this time, the freely sliding steel ball enters the corresponding receiving box under the guidance of the long side of the rotating baffle; if the position of the receiving box corresponding to the diameter of the steel ball is in the receiving box at the tail of the steel ball slide, the push-pull cylinders of all material blocking assemblies are controlled to remain in the initial state of contraction, and the freely sliding steel ball will fall directly into the receiving box at the tail of the steel ball slide; d. Repeat the above steps until the sorting is completed; (3) Steel balls of different diameters to be sorted are placed into a steel ball silo, and then the cylinder is controlled by a PLC program that is portable to the operator to be tested. If each type of steel ball is accurately sorted and placed into the corresponding receiving box, the test is passed, otherwise the test fails.

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