Static contact rod assembly welding device

Abstract

The utility model provides a static feeler lever assembly welding device, which belongs to the technical field of circuit breaker part processing equipment and comprises a static feeler lever feeding station, a contact feeding station, a static feeler lever assembly welding station and a static feeler lever assembly feeding station. The contact feeding work station is used for placing a contact above the position, dripped with soldering paste, of a static contact rod, the static contact rod assembly welding work station is used for welding the contact to the static contact rod, and the static contact rod assembly feeding work station is used for turning over a static contact rod assembly by a certain angle in a vertical plane, then rotating the static contact rod assembly by a certain angle in a horizontal plane and discharging the static contact rod assembly; according to the automatic feeding and welding device, automatic feeding and welding of the static contact rods and the contacts are achieved, the consistency of the welding paste position, the welding paste using amount, the welding quality and the contact orientation can be guaranteed, the production efficiency is greatly improved, and the requirement for large-scale production is met.

Description

Technical Field

[0001] The utility model relates to the technical field of processing equipment for breaker components, and particularly relates to a welding device for a static contact rod assembly. Background Art

[0002] As an important part of the breaker, the electromagnetic system is responsible for quickly cutting off the current when a short circuit or overload occurs in the circuit. Its processing quality directly affects the performance and reliability of the product. The electromagnetic system includes a yoke coil assembly and a pressure plate assembly. The yoke coil assembly includes a yoke, a static contact rod assembly and a coil assembly. The static contact rod assembly includes a static contact rod and a contact, and the contact is welded on the static contact rod.

[0003] However, at present, the processing of the static contact rod assembly mainly relies on manual operation and traditional mechanical equipment. Generally, manual workers drop solder paste on the static contact rod and then weld the contact on it. However, manual processing has problems such as low efficiency, poor consistency and high labor intensity. Especially for the solder paste position, solder paste dosage, welding quality, contact orientation, etc., it is very difficult for manual processing to control uniformly, and it is difficult to meet the requirements of large-scale production. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the disadvantages and deficiencies existing in the prior art, and to provide a welding device for a static contact rod assembly.

[0005] The technical solution adopted by the utility model is as follows: A welding device for a static contact rod assembly includes a static contact rod feeding station, a contact feeding station, a static contact rod assembly welding station and a static contact rod assembly feeding station;

[0006] The static contact rod feeding station is used for feeding the static contact rods one by one and dropping a fixed amount of solder paste at a specified position on the static contact rod;

[0007] The contact feeding station is used for feeding the contacts one by one and placing them above the position where the solder paste is dropped on the static contact rod;

[0008] The static contact rod assembly welding station is used for welding the contact on the static contact rod;

[0009] The static contact rod assembly feeding station is used for turning the static contact rod assembly by a certain angle in the vertical plane, and then rotating it by a certain angle in the horizontal plane and discharging it.

[0010] In some embodiments, the static contact rod feeding station includes a static contact rod vibrating bowl, a first static contact rod linear vibrating track, and a first static contact rod distributing mechanism. The first static contact rod distributing mechanism includes a first static contact rod distributing block, and a first static contact rod positioning portion adapted to the static contact rod is provided on the first static contact rod distributing block. The first static contact rod distributing block has a first position where the first static contact rod positioning portion is aligned with the first static contact rod linear vibrating track and a second position where the first static contact rod positioning portion is aligned with the static contact rod feeding channel.

[0011] In some embodiments, the static contact rod feeding station further includes a static contact rod solder paste dripping mechanism, a solder paste detection mechanism, and a first static contact rod manipulator. The static contact rod solder paste dripping mechanism includes a solder paste gun facing the first static contact rod distributing block. The solder paste detection mechanism includes a static contact rod feeding channel and a first detector facing the static contact rod feeding channel. The first static contact rod manipulator is used to clamp the static contact rod and move it on the static contact rod feeding channel to the detection position of the first detector.

[0012] In some embodiments, the detection targets of the first detector include at least one of whether there is solder paste on the static contact rod, whether the position of the solder paste is correct, and whether the amount of solder paste used meets the requirements.

[0013] In some embodiments, the contact feeding station includes a contact vibrating bowl, a contact linear vibrating track, and a contact adsorption mechanism. A contact picking position is provided on the contact linear vibrating track. The contact adsorption mechanism includes an adsorption rod, and the adsorption rod moves to the contact picking position to pick up the contact.

[0014] In some embodiments, a second detector is provided above the contact vibrating bowl. The second detector uses a vision detection device, and its detection target is the front and back sides of the contact to ensure that the position of the silver point on the contact is correct when the contact is discharged.

[0015] In some embodiments, the static contact rod assembly welding station includes a second static contact rod linear vibrating track, a second static contact rod distributing mechanism, a second static contact rod manipulator, and a static contact rod assembly welding machine. The second static contact rod distributing mechanism includes a second static contact rod distributing block and a static contact rod distributing positioning block provided at the end of the second static contact rod linear vibrating track. Second static contact rod positioning portions adapted to the static contact rod are formed on both of them. The static contact rod assembly welding machine includes a static contact rod assembly welding position. The second static contact rod distributing block has a feeding position where the second static contact rod positioning portion is aligned with the second static contact rod linear vibrating track and a discharging position where it moves upward so that the static contact rod can be grabbed by the second static contact rod manipulator. The second static contact rod manipulator grabs the static contact rod and moves it to the static contact rod assembly welding position.

[0016] In some embodiments, the feeding station of the static contact rod assembly includes a third static contact rod manipulator, a linear vibrating track for the static contact rod assembly, a manipulator for the static contact rod assembly, and a material distributing mechanism for the static contact rod assembly. The third static contact rod manipulator is used to move the static contact rod assembly onto the linear vibrating track for the static contact rod assembly. The material distributing mechanism for the static contact rod assembly includes a rotating seat for the static contact rod assembly arranged at the end of the linear vibrating track for the static contact rod assembly and a positioning plate for the static contact rod assembly arranged on the rotating seat for the static contact rod assembly. The positioning plate for the static contact rod assembly is provided with a positioning groove for the static contact rod assembly adapted to the static contact rod assembly. The positioning plate for the static contact rod assembly rotates following the rotating seat for the static contact rod assembly, and has a third position where the positioning groove for the static contact rod assembly is aligned with the discharge port of the linear vibrating track for the static contact rod assembly and a fourth position where the manipulator for the static contact rod assembly can grab the static contact rod assembly. The manipulator for the static contact rod assembly is used to grab the static contact rod assembly and move it onto the fixture.

[0017] In some embodiments, it further includes a third detector, which detects whether there is a contact point on the static contact rod. A second discharge hopper is arranged below the moving path of the second static contact rod manipulator. When the detection result of the third detector is unqualified, the second static contact rod manipulator moves the unqualified static contact rod above the second discharge hopper for discharging. If the detection result of the third detector is qualified, it enters the next process.

[0018] In some embodiments, it further includes a fourth detector, which detects whether the welding of the static contact rod assembly is qualified. A third discharge hopper is arranged below the moving path of the third static contact rod manipulator. When the detection result of the fourth detector is unqualified, the third static contact rod manipulator moves the unqualified static contact rod above the third discharge hopper for discharging. If the detection result of the fourth detector is qualified, it enters the next process.

[0019] The beneficial effects of the present utility model are as follows: In the present utility model, the automatic feeding and welding of the static contact rod and the contact point are realized, which can ensure the consistency of the solder paste position, the amount of solder paste, the welding quality, and the orientation of the contact point, greatly improving the production efficiency and meeting the requirements of large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, obtaining other drawings based on these drawings still belongs to the scope of the present utility model.

[0021] Figure 1 It is a schematic diagram of a welding device for a static contact rod assembly in the present utility model;

[0022] Figure 2Schematic diagram of the static contact rod feeding station 3 and the contact point feeding station 4 in the present utility model;

[0023] Figure 3 Partial schematic of a static contact rod assembly welding device in the present utility model Figure 1 ;

[0024] Figure 4 Partial schematic of a static contact rod assembly welding device in the present utility model Figure 2 ;

[0025] Figure 5 Partial schematic of a static contact rod assembly welding device in the present utility model Figure 3 ;

[0026] Figure 6 Schematic diagram of the static contact rod assembly welding station and the static contact rod assembly feeding station in the present utility model;

[0027] Figure 7 Partial schematic of the static contact rod assembly feeding station in the present utility model;

[0028] Figure 8 Schematic diagram of the static contact rod assembly in the present utility model. Detailed implementation manners

[0029] The following description provides specific application scenarios and requirements of this specification, aiming to enable those skilled in the art to manufacture and use the content in this specification. For those skilled in the art, various partial modifications to the disclosed embodiments are obvious, and without departing from the spirit and scope of this specification, the general principles defined here can be applied to other embodiments and applications. Therefore, this specification is not limited to the shown embodiments, but has the broadest scope consistent with the claims.

[0030] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the orientation or positional relationships indicated by terms such as "longitudinal", "transverse", "radial", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation.

[0031] Secondly, terms such as "first", "second" and similar words do not represent any order, quantity or importance, but are only used to distinguish different components, and should not be understood as a limitation to the embodiments of this application.

[0032] In addition, the terms "installed", "set up", "provided with", "connected", and "linked" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, components, or constituent parts.

[0033] For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] In the description of this application, the expression "X includes at least one of A, B, or C" means that X includes at least A, or X includes at least B, or X includes at least C. That is to say, X can include only any one of A, B, and C, or can include any combination of A, B, and C as well as other possible contents / elements at the same time. Any combination of A, B, and C can be A, B, C, AB, AC, BC, or ABC.

[0035] Regarding the drawings of this application, it should be clearly understood that the drawings are only for the purpose of illustration and description, and are not intended to limit the scope of this specification. It should also be understood that the drawings are not drawn to scale.

[0036] Embodiment 1:

[0037] As Figures 1 to 7 shown, this embodiment provides a welding device for a static contact rod assembly, which realizes the automatic assembly of the static contact rod assembly. The welding device for the static contact rod assembly includes a static contact rod loading station 3, a contact loading station 4, a static contact rod assembly welding station 5, and a static contact rod assembly loading station 6; as Figure 8 shown, the static contact rod assembly a2 includes a static contact rod a21 and a contact a22, and the contact a22 is welded to the static contact rod a21.

[0038] The static contact rod feeding station 3 includes a static contact rod vibrating bowl 30, a first static contact rod linear vibrating track 31, a first static contact rod feeding mechanism 32, a static contact rod solder paste dripping mechanism 33, a solder paste detection mechanism 34, and a first static contact rod manipulator 35. The first static contact rod feeding mechanism 32 includes a first static contact rod feeding block 320, and a first static contact rod positioning portion 321 adapted to the static contact rod is provided on the first static contact rod feeding block 320. The static contact rod solder paste dripping mechanism 33 includes a solder paste gun 330 arranged towards the first static contact rod feeding block 320, and the solder paste gun 330 can drip a fixed amount of solder paste at the designated position of the static contact rod. The solder paste detection mechanism 34 includes a static contact rod material path 340 and a first detector 341 arranged towards the static contact rod material path 340. The first static contact rod feeding block 320 has a first position where the first static contact rod positioning portion 321 is aligned with the first static contact rod linear vibrating track 31 and a second position where the first static contact rod positioning portion 321 is aligned with the static contact rod material path 340. The first static contact rod manipulator 35 is used to clamp the static contact rod and move it on the static contact rod material path 340 to the detection position of the first detector 341. The detection targets of the first detector 341 include at least one of whether there is solder paste on the static contact rod, whether the position of the solder paste is correct, and whether the amount of solder paste used meets the requirements.

[0039] Wherein, a first discharge hopper is arranged below the moving path of the first static contact rod manipulator 35. When the detection result of the first detector 341 is unqualified, the first static contact rod manipulator 35 moves the unqualified static contact rod above the first discharge hopper for discharging. If the detection result of the first detector 341 is qualified, it enters the next process.

[0040] The contact feeding station 4 includes a contact vibrating bowl 40, a contact linear vibrating track 41, and a contact adsorption mechanism 42. A contact picking position is arranged on the contact linear vibrating track 41. The contact adsorption mechanism 42 includes an adsorption rod, and the adsorption rod moves to the contact picking position to pick up the contact.

[0041] Secondly, a second detector 43 is arranged above the contact vibrating bowl 40. The second detector 43 adopts a CCD vision detection device, and its detection target is the front and back of the contact to ensure that the position of the silver point on the contact is correctly oriented when the contact is discharged.

[0042] The static contact rod assembly welding station 5 includes a second static contact rod linear vibrating track 50, a second static contact rod feeding mechanism 51, a second static contact rod manipulator 52, and a static contact rod assembly welding machine 53. The first static contact rod manipulator 35 is also used to move the static contact rod from the detection position of the first detector 341 to the second static contact rod linear vibrating track 50. Among them, the first static contact rod manipulator 35 includes a first gripper 350 and a second gripper 351 that move synchronously. When the first gripper 350 moves the static contact rod to the detection position of the first detector 341, the second gripper 351 just moves the detected static contact rod onto the second static contact rod linear vibrating track 50.

[0043] The second static contact rod feeding mechanism 51 includes a second static contact rod feeding block 510 and a static contact rod feeding positioning block 511 arranged at the end of the second static contact rod linear vibration track 50. A second static contact rod positioning portion 5100 adapted to the static contact rod is formed on both of them. The static contact rod assembly welding machine 53 includes a static contact rod assembly welding position 530. The second static contact rod feeding block 510 has a feeding position where the second static contact rod positioning portion 5100 is aligned with the second static contact rod linear vibration track 50, and a discharging position where it moves upward so that the static contact rod can be grabbed by the second static contact rod manipulator 52. The second static contact rod manipulator 52 grabs the static contact rod and moves it to the static contact rod assembly welding position 530.

[0044] The static contact rod assembly loading station 6 includes a third static contact rod manipulator 60, a static contact rod assembly linear vibration track 61, a static contact rod assembly manipulator 62, and a static contact rod assembly feeding mechanism 63. The static contact rod assembly loading station 6 is generally arranged at the edge of the turntable and is used in cooperation with the fixture on the turntable to load the processed static contact rod assembly into the fixture.

[0045] The third static contact rod manipulator 60 is used to move the static contact rod assembly onto the static contact rod assembly linear vibration track 61. The static contact rod assembly feeding mechanism 63 includes a static contact rod assembly rotating seat 630 arranged at the end of the static contact rod assembly linear vibration track 61 and a static contact rod assembly positioning plate 631 arranged on the static contact rod assembly rotating seat 630. A static contact rod assembly positioning groove adapted to the static contact rod assembly is provided on the static contact rod assembly positioning plate 631. The static contact rod assembly positioning plate 631 rotates with the static contact rod assembly rotating seat 630 and has a third position where the static contact rod assembly positioning groove is aligned with the discharging port of the static contact rod assembly linear vibration track 61 and a fourth position where the static contact rod assembly can be grabbed by the static contact rod assembly manipulator 62. The static contact rod assembly manipulator 62 is used to grab the static contact rod assembly and move it onto the fixture. Specifically, since the static contact rod assembly is with the contact points facing upward during welding, the static contact rod assembly is first rotated 90° in the longitudinal plane by the static contact rod assembly feeding mechanism 63, and then the static contact rod assembly is grabbed by the static contact rod assembly manipulator 62 and rotated 90° in the horizontal plane and placed on the fixture, so as to facilitate subsequent assembly.

[0046] In addition, a first opening mechanism 64 is further included. The corresponding clamping part on the fixture is opened by the first opening mechanism 64, so as to place the static contact rod assembly therein.

[0047] Further, it further includes a third detector, which detects whether there is a contact on the static contact rod and whether the position of the contact is correct. A second discharge hopper is provided below the moving path of the second static contact rod manipulator 52. When the detection result of the third detector is unqualified, the second static contact rod manipulator 52 moves the unqualified static contact rod above the second discharge hopper for discharging. If the detection result of the third detector is qualified, it enters the next process.

[0048] Further, it further includes a fourth detector, which detects whether the welding of the static contact rod assembly is qualified. A third discharge hopper is provided below the moving path of the third static contact rod manipulator 60. When the detection result of the fourth detector is unqualified, the third static contact rod manipulator 60 moves the unqualified static contact rod above the third discharge hopper for discharging. If the detection result of the fourth detector is qualified, it enters the next process.

[0049] Secondly, a positioning groove 610 is provided at the discharge port of the linear vibration track 61 of the static contact rod assembly. A positioning rib 6300 is provided along the rotation direction on the static contact rod assembly rotating seat 630. During the rotation of the static contact rod assembly rotating seat 630, the positioning rib 6300 is always located in the positioning groove 610, ensuring the stability of the rotation of the static contact rod assembly rotating seat 630.

[0050] Furthermore, two limiting protrusions are provided at intervals on the positioning rib 6300, which are used to limit the rotation range of the static contact rod assembly rotating seat 630 and ensure that the static contact rod assembly rotating seat 630 accurately stops at the third position and the fourth position.

[0051] It should be understood that in this application, the driving part mechanisms in each work station are not described in detail. For example, the manipulator can move in three XYZ axes and can rotate, and the translation or rotation of material distribution. The driving mechanisms required for such actions should be well known to those skilled in the art.

[0052] In summary, after reading this detailed disclosure, those skilled in the art can understand that the foregoing detailed disclosure can be presented only by way of example and may not be restrictive. Although not explicitly stated here, those skilled in the art can understand that the requirements of this application encompass various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are intended to be proposed by this application and are within the spirit and scope of the exemplary embodiments of this application.

[0053] In addition, it should be understood that in the foregoing description of the embodiments of the present application, for the purpose of helping to understand a feature and for the purpose of simplifying the present application, the present application combines various features in a single embodiment, drawing, or its description. However, this does not mean that the combination of these features is necessary. When reading the present application, those skilled in the art may very well mark out some of the devices as separate embodiments for understanding. That is to say, the embodiments in the present application can also be understood as the integration of multiple secondary embodiments. And it is also valid when the content of each secondary embodiment is less than all the features of a single foregoing disclosed embodiment.

[0054] Finally, it should be understood that the embodiments of the application disclosed herein are illustrative of the principles of the embodiments of the present application. Other modified embodiments are also within the scope of the present application. Therefore, the embodiments disclosed in the present application are merely examples and not limitations. Those skilled in the art can adopt alternative configurations according to the embodiments in the present application to implement the application in the present application. Therefore, the embodiments of the present application are not limited to the embodiments precisely described in the application.

Claims

1. A welding device for a static contact rod assembly, characterized in that, It includes a static contact rod feeding station, a contact feeding station, a static contact rod assembly welding station and a static contact rod assembly feeding station; The static contact rod feeding station is used to separately feed the static contact rods one by one, and drop a fixed amount of solder paste at the designated position of the static contact rod; The contact feeding station is used to separately feed the contacts one by one, and place them above the position where the solder paste is dropped on the static contact rod; The static contact rod assembly welding station is used to weld the contacts on the static contact rod; The static contact rod assembly feeding station is used to turn the static contact rod assembly by a certain angle in the vertical plane, and then rotate it by a certain angle in the horizontal plane and discharge the material.

2. The welding device for a static contact rod assembly according to claim 1, characterized in that, The static contact rod feeding station includes a static contact rod vibrating bowl, a first static contact rod linear vibrating track and a first static contact rod separating mechanism. The first static contact rod separating mechanism includes a first static contact rod separating block, and a first static contact rod positioning part adapted to the static contact rod is arranged on the first static contact rod separating block. The first static contact rod separating block has a first position where the first static contact rod positioning part is aligned with the first static contact rod linear vibrating track and a second position where the first static contact rod positioning part is aligned with the static contact rod material channel.

3. The welding device for a static contact rod assembly according to claim 2, wherein The static contact rod feeding station further includes a static contact rod solder paste dropping mechanism, a solder paste detection mechanism and a first static contact rod manipulator. The static contact rod solder paste dropping mechanism includes a solder paste gun arranged towards the first static contact rod separating block. The solder paste detection mechanism includes a static contact rod material channel and a first detector arranged towards the static contact rod material channel. The first static contact rod manipulator is used to clamp the static contact rod and move it on the static contact rod material channel to the detection position of the first detector.

4. The welding device for a static contact rod assembly according to claim 3, wherein, The detection targets of the first detector include at least one of whether there is solder paste on the static contact rod, whether the position of the solder paste is correct, and whether the amount of solder paste used meets the requirements.

5. A welding device for a static contact rod assembly according to claim 1, characterized in that, The contact feeding station includes a contact vibrating bowl, a contact linear vibrating track and a contact adsorption mechanism. A contact picking position is arranged on the contact linear vibrating track. The contact adsorption mechanism includes an adsorption rod, and the adsorption rod moves to the contact picking position to pick up the contact.

6. The welding device for a static contact rod assembly according to claim 5, characterized in that, A second detector is arranged above the contact vibrating bowl. The second detector adopts a vision detection device, and its detection target is the front and back sides of the contact to ensure that the position of the silver point on the contact is correct when the contact is discharged.

7. The welding device for a static contact rod assembly according to claim 3, wherein, The static contact rod assembly welding station includes a second static contact rod linear vibrating track, a second static contact rod separating mechanism, a second static contact rod manipulator and a static contact rod assembly welding machine. The second static contact rod separating mechanism includes a second static contact rod separating block and a static contact rod separating and positioning block arranged at the end of the second static contact rod linear vibrating track. Second static contact rod positioning parts adapted to the static contact rod are formed on both of them. The static contact rod assembly welding machine includes a static contact rod assembly welding position. The second static contact rod separating block has a feeding position where the second static contact rod positioning part is aligned with the second static contact rod linear vibrating track and a discharging position where it moves upward so that the static contact rod can be grabbed by the second static contact rod manipulator. The second static contact rod manipulator grabs the static contact rod and moves it to the static contact rod assembly welding position.

8. The welding device for a static contact rod assembly according to claim 7, characterized in that, The feeding station of the static contact rod assembly includes a third static contact rod manipulator, a linear vibrating track for the static contact rod assembly, a manipulator for the static contact rod assembly, and a material distributing mechanism for the static contact rod assembly. The third static contact rod manipulator is used to move the static contact rod assembly onto the linear vibrating track for the static contact rod assembly. The material distributing mechanism for the static contact rod assembly includes a rotating seat for the static contact rod assembly arranged at the end of the linear vibrating track for the static contact rod assembly and a positioning plate for the static contact rod assembly arranged on the rotating seat for the static contact rod assembly. A positioning groove for the static contact rod assembly adapted to the static contact rod assembly is arranged on the positioning plate for the static contact rod assembly. The positioning plate for the static contact rod assembly rotates following the rotating seat for the static contact rod assembly, and has a third position where the positioning groove for the static contact rod assembly is aligned with the discharge port of the linear vibrating track for the static contact rod assembly and a fourth position where the manipulator for the static contact rod assembly can grab the static contact rod assembly. The manipulator for the static contact rod assembly is used to grab the static contact rod assembly and move it onto the fixture.

9. The welding device for a static contact rod assembly according to claim 8, wherein, It further includes a third detector, whose detection target is whether there is a contact on the static contact rod. A second discharge hopper is arranged below the moving path of the second static contact rod manipulator. When the detection result of the third detector is unqualified, the second static contact rod manipulator moves the unqualified static contact rod above the second discharge hopper for discharging. If the detection result of the third detector is qualified, it enters the next process.

10. A welding device for a static contact rod assembly according to claim 8, characterized in that, It further includes a fourth detector, whose detection target is whether the welding of the static contact rod assembly is qualified. A third discharge hopper is arranged below the moving path of the third static contact rod manipulator. When the detection result of the fourth detector is unqualified, the third static contact rod manipulator moves the unqualified static contact rod above the third discharge hopper for discharging. If the detection result of the fourth detector is qualified, it enters the next process.

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