A device for screening the size of workpiece bracts

Abstract

The present invention relates to a device for screening the bud size of workpieces, comprising a frame, a vibrating plate installed on the frame, a first screening component and a second screening component installed at the outlet of the vibrating plate; the first screening component has a first channel, and the first channel performs a first screening on the workpieces; the second screening component has a second channel, and the second channel performs a second screening on the workpieces, thereby screening out the workpieces whose bud size does not meet the requirements.

Description

Technical Field

[0001] The invention relates to the field of automatic screening equipment, in particular to a device for screening the size of buds of workpieces. Background Art

[0002] In the electromagnetic mechanism, the ferromagnetic body that is attracted by the fixed electromagnet and forms a closed magnetic circuit with the electromagnet after movement is called "armature". The existing armature is usually provided with a bud point, which can be fixed with the spring structure or limit the position. In the process of armature processing, the bud point size may deviate or be missing due to various reasons, so it is necessary to screen the bud point size on the armature. Summary of the invention

[0003] The present invention aims to provide a device for screening the bract sizes of workpieces capable of sorting two bracts at the same time.

[0004] The specific plan is as follows:

[0005] A device for screening the size of workpiece buds, comprising a frame, a vibrating plate installed on the frame, a first screening component and a second screening component installed at the outlet of the vibrating plate;

[0006] The vibrating plate guides and conveys the workpiece located in the vibrating plate;

[0007] The first screening component has a first channel, the first channel has a first groove portion arranged to match the bulge on the workpiece, a first through groove located in the middle of the first channel, and a first screening block located directly above the first through groove and arranged to match the bulge of the workpiece, and a first spacing is provided between the first screening block and the workpiece entering the first channel; the workpiece whose bulge height is greater than the depression depth of the first groove portion cannot enter the first channel and is screened out, the bulge of the workpiece whose bulge height is greater than the first spacing can be placed on the first screening block and pass through the first through groove, and the workpiece whose bulge height is less than or equal to the first spacing falls out of the first through groove and is screened out;

[0008] The second screening component has a second channel, the second channel has a second groove part matched with the bud point on the workpiece, a second through groove located in the middle of the second channel, and a second screening block located directly above the second through groove and matched with the bud point of the workpiece, and a second spacing between the second screening block and the workpiece entering the second channel; the depression depth of the second groove part is not less than the depression depth of the first groove part, and the second spacing is greater than the first spacing; the bud point of the workpiece with a bud point height greater than the second spacing can be placed on the second screening block and screened out through the second through groove, and the workpiece with a bud point height less than or equal to the second spacing falls out of the second through groove and is collected.

[0009] Furthermore, the first screening component also includes a first cylinder, and a piston rod of the first cylinder is connected to the first screening block and can adjust the size of the first spacing.

[0010] Furthermore, the first screening component also includes a first optical fiber sensor, which is used to detect whether the first through groove is blocked, and the first optical fiber sensor is connected to the first cylinder signal.

[0011] Furthermore, the first screening component also includes a second cylinder, a first ejector pin is installed on the piston rod of the second cylinder, the first ejector pin is located at the front section of the first through slot, and can push up the workpiece that enters the first channel but does not enter the first through slot to prevent its movement, and the first optical fiber sensor is signal-connected to the second cylinder.

[0012] Furthermore, it also includes a first delay controller, which is used to control the delayed opening and closing of the first cylinder.

[0013] Furthermore, the second screening component also includes a third cylinder, the piston rod of the third cylinder is connected to the second screening block and can adjust the size of the second spacing.

[0014] Furthermore, the second screening component also includes a second optical fiber sensor, which is used to detect whether the second through groove is blocked, and the second optical fiber sensor is connected to the third cylinder signal.

[0015] Furthermore, the second screening component also includes a fourth cylinder, a second ejector pin is installed on the piston rod of the fourth cylinder, the second ejector pin is located at the front section of the second through slot, and can push up the workpiece that enters the second channel but does not enter the second through slot to prevent its movement, and the second optical fiber sensor is connected to the fourth cylinder signal.

[0016] Furthermore, it also includes a second delay controller, which is used to control the delayed opening and closing of the third cylinder.

[0017] Furthermore, the parts of the first screening component and the second screening component that are in direct contact with the workpiece are processed using non-magnetic tungsten steel.

[0018] Compared with the prior art, the device for screening the bud size of workpieces provided by the present invention has the following advantages: the device for screening the bud size of workpieces provided by the present invention can screen out armature workpieces with bud heights less than or equal to the first spacing and greater than the second spacing through the first screening component and the second screening component, thereby realizing automatic screening of the armature bud height, and has the advantages of simple structure and high screening accuracy, and is suitable for use on automated production equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram showing an apparatus for screening the bract size of a workpiece.

[0020] Figure 2 A schematic diagram of a vibrating plate is shown.

[0021] Figure 3 A schematic side view of the first screening component is shown.

[0022] Figure 4 A schematic perspective view of a first screening component is shown.

[0023] Figure 5 A schematic diagram of the armature is shown.

[0024] Figure 6 A schematic diagram of a first fixing plate is shown.

[0025] Figure 7 A schematic side view of the second screening component is shown.

[0026] Figure 8 A perspective schematic diagram of the second screening component is shown.

[0027] Fig. 9 A three-dimensional schematic diagram of the second screening component after the side plate is removed is shown.

[0028] Fig.10 A schematic diagram of the second fixing plate is shown. DETAILED DESCRIPTION

[0029] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0030] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0031] like Figure 1 As shown, this embodiment provides a device for screening the bud size of a workpiece, including a frame 1, a vibrating plate 2 installed on the frame 1, a first screening component 3 and a second screening component 4 installed at the outlet of the vibrating plate 2, and a good product collection box 5 for receiving good products and a defective product collection box 6 for receiving defective products.

[0032] The frame 1 is generally a steel structure, and has a table 11 with a mounting surface 110 and a plurality of supporting pads 12 .

[0033] refer to Figure 1 and Figure 2 The vibration plate 2 includes a vibration body 21, a tray body 22 and a vibration plate controller 23. The tray body 22 is installed on the vibration body 21. The vibration body 21 drives the parts in the tray body 22 to rise along the spiral track, and adjusts the posture during the rise, so that the parts can automatically enter the first screening component 3 and the second screening component 4 in a unified state as required to perform screening. Since the vibration plate 2 is a prior art, its specific structure and working principle are not described in detail here. In this embodiment, a silo 7 for automatically feeding the vibration plate 2 is also installed on the mounting table 110. The workpieces with random postures in the vibration plate in this embodiment are flipped by the track and corrected to a directional posture.

[0034] The first screening component 3 is used to screen the height of the armature. Figure 5 In this embodiment, the armature 8 has bulges on both sides as an example for explanation, one side has two bulges 81 arranged side by side, and the other side has only one bulge 81. In the text, a single bulge refers to a bulge with only one bulge on one side of the armature, and a double bulge refers to a bulge with two bulges on one side of the armature. Assuming that the set bulge height is 0.6mm, it is judged to be qualified within the range of 0.4-0.8mm, and it is judged to be unqualified if the bulge height is less than or equal to 0.4mm or greater than 0.8mm.

[0035] refer to Figure 3-Figure 6 The first screening component 3 includes a first fixing plate 31, a first side plate 32, a first ejector pin 33, a first screening block 34, a first cylinder 35 and a second cylinder 36. The first fixing plate 31 and the first side plate 32 are disposed opposite to each other and cooperate to form a first passage 30 for the armature 8 to pass through. The first passage 30 includes a first vertical portion 301 for the body of the armature 8 to pass through and a first groove portion 302 for the bud 81 on the armature 8 to pass through.

[0036] The depression depth of the first groove part 302 is defined as H1. When the height of the bud point 81 exceeds H1, the armature 8 cannot enter the first channel 30. In this embodiment, the depth of the first groove part 302 is set to 1mm, that is, when the bud point height exceeds 1mm, it cannot enter the entrance of the first channel 30, and will be directly squeezed out by the continuous armature parts behind and fall back into the material tray. If the armature parts are not squeezed out and are stuck at the entrance, there will be a material shortage alarm, which can be handled manually. Since the armature 8 in this embodiment has a single bud point and a double bud point on both sides, the side of the first channel 30 has not only a first groove part 302 for the double bud point to pass through, but also a first single bud point groove part 302' for the single bud point to pass through. In this embodiment, the example of screening the size of the double bud point on one side of the armature is used for explanation. Therefore, the single bud point on the armature is a product that has been screened and meets the requirements. Therefore, the depression depth of the first single bud point groove part 302' can allow the single bud point to pass through.

[0037] In addition, when one of the double points of the armature 8 is missing, it will hit the wall at the entrance of the first channel 30 and fall back into the material tray due to poor hooking posture and inconsistent insertion posture, so that the armature workpiece with a single missing point can be eliminated.

[0038] A first through slot 303 for the armature to fall out is provided on the bottom surface of the middle part of the first channel 30, and the second cylinder 36 and the first cylinder 35 are arranged side by side along the travel direction of the armature 8. The first ejector pin 33 and the first screening block 34 are fixedly connected to the piston rods of the second cylinder 36 and the first cylinder 35, respectively, and the second cylinder 36 is located at the front section of the travel direction of the armature 8 relative to the first cylinder 35. The top surface of the first screening block 34 on the first cylinder 35 is matched with the position of the two buds 81 on the double bud side of the armature 8, so that the double bud on the armature can ride on the first screening block 34 and travel through the first channel 30 by vibration power.

[0039] The minimum vertical distance between the end face of the first screening block 34 facing the armature and the double bud side of the armature 8 is defined as L1. When the bud height is greater than L1, the bud on the armature workpiece can be placed on the first screening block 34 and then pass through the first channel 30; when the bud height is less than L1, the bud on the armature workpiece cannot be placed on the first screening block 34, and will fall by its own weight and fall from the first through slot into the defective product collection box 6. When the bud height is equal to L1 (i.e., the zero-position bud), the armature workpiece will be stuck in the first screening component 3. At this time, the first optical fiber sensor 91 can be used to detect whether the material is stuck, and the output signal of the first optical fiber sensor 91 is fed back to the first controller (not visible in the view in Figure 1). The first controller controls the first cylinder to open and close to remove the stuck material. At the same time, the size of L1 can also be adjusted by the length of the first cylinder piston rod, so that the first screening component 3 can adjust the bud height screening according to actual needs. In this embodiment, L1 is set to 0.4 mm, that is, the armature with a bud point height greater than 0.4 mm can pass through the first screening component 3, and the armature with a bud point height less than or equal to 0.4 mm falls from the first through slot to the defective product collection box 6 for recycling. Therefore, the armature workpiece that passes the first screening component 3 is the armature workpiece with a bud point height greater than 0.4 mm and less than 1 mm.

[0040] The first controller is also connected to the second cylinder 36. After the first optical fiber sensor 91 feeds back the signal to the first controller, the first controller controls the opening and closing of the first cylinder 35 to solve the blockage, and also controls the second cylinder 36 to move, so that the first ejector on the piston rod of the second cylinder will hold the workpiece that has entered the first channel but not the first through groove and stop its movement, so as to prevent the qualified workpiece from falling into the first through groove when the first cylinder 35 opens and closes, so that the first screening component will suspend feeding only when the blockage is eliminated. After the blockage is eliminated, the first cylinder and the second cylinder are reset, and the first screening component resumes feeding and continues the screening operation.

[0041] refer to Figure 1-Figure 2 as well as Figure 7-10 The second screening component 4 is located at the rear section of the first screening component 3, and its structure is substantially the same as that of the first screening component 3, including a second fixing plate 41, a second side plate 42, a second ejector pin 43, a second screening block 44, a third cylinder 45 and a fourth cylinder 46. Figure 8 The fourth cylinder 46 in FIG. 4 is displaced so that the second ejector pin 43 can be seen.

[0042] The second fixed plate 41 and the second side plate 42 are arranged opposite to each other and cooperate to form a second channel 40 for the armature 8 to pass through. The second channel 40 includes a second vertical portion 401 for the plate body of the armature 8 to pass through and a second groove portion 402 for the bud point 81 on the armature 8 to pass through. The depression depth of the second groove portion 402 is defined as H2, which is usually the same as the depression depth H1 of the first groove portion 302, that is, H2 = H1. Since the bud point 81 has been screened by the first screening component 3, the armature passing through the first screening component 3 can enter the second channel 40. The second channel 40 also has a second single bud point groove portion 402' for a single bud point to pass through.

[0043] A second through slot 403 for the armature to fall out is provided on the bottom surface of the middle part of the second channel 40, and the fourth cylinder 46 and the third cylinder 45 are arranged side by side along the travel direction of the armature 8. The second ejector pin 43 and the second screening block 44 are fixedly connected to the piston rods of the fourth cylinder 46 and the third cylinder 45, respectively, and the third cylinder 45 is located at the front section of the travel direction of the armature 8 relative to the fourth cylinder 46. The top surface of the second screening block 44 on the fourth cylinder 46 is matched with the position of the two bud points 81 on the double bud point side of the armature 8, so that the double bud point on the armature can be placed on the second screening block 44 and pushed by the subsequent armature workpiece to enter the second channel 40. The minimum vertical distance between the end face of the second screening block 44 facing the armature and the double bud side of the armature 8 is defined as L2. When the bud height is greater than L2, the bud on the armature workpiece can be placed on the second screening block 44 and then pass through the second channel 40; when the bud height is less than L2, the bud on the armature workpiece cannot be placed on the second screening block 44, and will fall by its own weight and fall from the second through slot into the good product collection box 5. When the bud height is equal to L2 (i.e., the zero-position bud), the armature workpiece will be stuck in the second screening component 4. At this time, the second optical fiber sensor 92 can be used to detect whether the material is stuck, and the output signal of the second optical fiber sensor 92 is fed back to the second controller (not visible in the view in Figure 1). The second controller controls the second cylinder to open and close to remove the stuck material. At the same time, the size of L2 can be adjusted by the length of the piston rod of the third cylinder, so that the second screening component 4 can adjust the bud height screening according to actual needs. In this embodiment, L2 is set to 0.8mm, that is, the armature with a bud point height greater than 0.8mm can pass through the second screening component 4 and fall into another defective product collection box for collection and recovery; the armature with a bud point height greater than 0.4mm and less than or equal to 0.8mm falls from the second through groove to the good product collection box 5 for collection.

[0044] refer to Fig.10The second channel 40 is also provided with a clearance groove 404 at the rear section of the second through groove 403, and the clearance groove 404 can be used to solve the abnormal situation of bale point recognition. For example, when one bale point is relatively high and the other bale point is qualified, the bale point can be supported to hang on the fixed block without being rejected because of the relatively high bale point height. When entering the second screening component and passing through the second through groove 403, the armature moves obliquely. If it does not make way, it will be stuck in the second through groove 403, and the bale point judged as zero position qualified will be put into the qualified product box, causing misjudgment.

[0045] The second controller is also connected to the fourth cylinder 46. After the second optical fiber sensor 92 feeds back the signal to the second controller, the second controller controls the opening and closing of the third cylinder 45 to solve the blockage, and also controls the fourth cylinder 46 to move, so that the second ejector on the piston rod of the fourth cylinder will hold the workpiece that has entered the second channel and has not entered the second through groove and prevent it from moving, so as to prevent the unqualified workpiece from falling into the second through groove when the third cylinder 45 opens and closes, and the second screening component will suspend feeding only when the blockage is eliminated. After the blockage is eliminated, the third cylinder and the fourth cylinder are reset, and the second screening component resumes feeding and continues the screening operation. Thus, the armature workpieces with a bud point height less than or equal to 0.4 mm and greater than 0.8 mm are screened out by the first screening component 3 and the second screening component 4, completing the automatic screening of the armature bud point height.

[0046] In this embodiment, the parts of the first and second screening components that are in direct contact with the armature workpiece are processed using non-magnetic tungsten steel as the main material to prevent the workpiece from sticking to the parts due to frictional magnetism and causing poor screening.

[0047] In addition, the first and second controllers use a delay controller to ensure the delay function of the cylinder opening and closing, which removes the PLC programming control function, thereby reducing costs and extending the service life of controller components.

[0048] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A device for screening the size of the bracts of a workpiece, characterized in that: It includes a frame, a vibrating plate installed on the frame, and a first screening component and a second screening component installed at the outlet of the vibrating plate; The vibrating plate guides and conveys the workpiece located in the vibrating plate; The first screening component has a first channel, the first channel has a first groove portion arranged to match the bulge on the workpiece, a first through groove located in the middle of the first channel, and a first screening block located directly above the first through groove and arranged to match the bulge of the workpiece, and a first distance is provided between the first screening block and the workpiece entering the first channel; The workpieces whose bud height is greater than the depression depth of the first groove part cannot enter the first channel and are screened out; the buds of the workpieces whose bud height is greater than the first spacing can be placed on the first screening block and pass through the first through groove; the workpieces whose bud height is less than or equal to the first spacing fall out of the first through groove and are screened out; The second screening component has a second channel, the second channel has a second groove portion arranged to match the bulge on the workpiece, a second through groove located in the middle of the second channel, and a second screening block located directly above the second through groove and arranged to match the bulge of the workpiece, and a second spacing is provided between the second screening block and the workpiece entering the second channel; the depression depth of the second groove portion is not less than the depression depth of the first groove portion, and the second spacing is greater than the first spacing; The bracts of the workpieces whose bract height is greater than the second spacing can be placed on the second screening block and passed through the second through slot to be screened out, and the workpieces whose bract height is less than or equal to the second spacing fall out of the second through slot to be collected.

2. The device according to claim 1, characterized in that: The first screening component also includes a first cylinder, and the piston rod of the first cylinder is connected to the first screening block and can adjust the size of the first spacing.

3. The device according to claim 2, characterized in that: The first screening component also includes a first optical fiber sensor and a first controller. The first optical fiber sensor is used to detect whether the first through groove is blocked. The first optical fiber sensor is connected to the first controller by signal. The first controller controls the operation of the first cylinder.

4. The device according to claim 3, characterized in that: The first screening component also includes a second cylinder, a first ejector pin is installed on the piston rod of the second cylinder, the first ejector pin is located at the front section of the first through slot, and can push up the workpiece that enters the first channel but does not enter the first through slot to prevent its movement, and the first controller controls the operation of the second cylinder.

5. The device according to claim 3, characterized in that: The first controller is a delay controller.

6. The device according to claim 1, characterized in that: The second screening component also includes a third cylinder, the piston rod of the third cylinder is connected to the second screening block and can adjust the size of the second spacing.

7. The device according to claim 6, characterized in that: The second screening component also includes a second optical fiber sensor and a second controller. The second optical fiber sensor is used to detect whether the second through groove is blocked. The second optical fiber sensor is connected to the second controller by signal. The second controller controls the operation of the third cylinder.

8. The device according to claim 7, characterized in that: The second screening component also includes a fourth cylinder, a second ejector is installed on the piston rod of the fourth cylinder, the second ejector is located at the front section of the second through slot, and can push up the workpiece that enters the second channel but does not enter the second through slot to prevent its movement, and the second controller controls the operation of the fourth cylinder.

9. The device according to claim 7, characterized in that: The second controller is a delay controller.

10. The device according to claim 1, characterized in that: The parts of the first screening component and the second screening component that are in direct contact with the workpiece are processed using non-magnetic tungsten steel.

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