A width comparison device for connecting rails and NXT rails

Abstract

The present invention discloses a device for comparing the width of a connecting track and an NXT track, comprising: a placement machine feed track, a connecting track, an optical sensor, a controller, a relay, and a track width comparison photosensor. Through the above-described method, the device for comparing the width of a connecting track and an NXT track of the present invention utilizes a laser sensor and a track width comparison photosensor to automatically determine whether the width of the connecting track and the placement machine feed track is consistent, effectively improving product quality and production capacity, reducing the failure rate of placement machine production, and having a simple structure and convenient use.

Description

Technical Field

[0001] The present invention relates to the technical field of SMT surface mounting lines, in particular to a width comparison device for connecting a track and an NXT track. Background Art

[0002] In the current PCB placement process, when the NXT placement machine sends a board request signal to the front connection track, if there is a PCB on the connection track, the connection track will immediately transfer the PCB to the NXT.

[0003] However, this board entry operation will bring the following problems:

[0004] 1. The connecting track cannot distinguish whether the track behind the NXT is the same width. When changing lines, the connecting track in front of the NXT has been adjusted to the track width of the next product, but the NXT has not yet completed the current product. When both devices are in operation, the connecting track will transfer the PCB of the next product to the NXT, causing the PCB to fall into the NXT with a larger track width.

[0005] 2. If the PCB falls into the NXT machine, it will need to be cleaned and reworked or scrapped.

[0006] 3. If the PCB falls into the NXT machine, it will cause damage to the NXT's patch head or track. Summary of the Invention

[0007] The main technical problem solved by the present invention is to provide a width comparison device for connecting rails and NXT rails, which has the advantages of high reliability, precise positioning, compact structure, etc., and has broad market prospects in the application and popularization of SMT surface mounting lines.

[0008] In order to solve the above technical problems, a technical solution adopted by the present invention is:

[0009] Provided is a width comparison device for connecting rails and NXT rails, comprising: a placement machine feed rail, a connecting rail, an optical sensor, a controller, a relay, and a rail width comparison photosensor.

[0010] The feed track of the placement machine includes a feed fixed side and a feed moving side that moves closer to or away from the feed fixed side, and the track width comparison photosensitivity point is set on the feed moving side.

[0011] The connecting track includes a connecting fixed side and a connecting movable side that moves closer to or away from the connecting fixed side, and the optical sensor for sensing the track width comparison photosensitivity point is arranged on the connecting movable side to determine whether the width of the connecting track is consistent with the width of the placement machine feed track.

[0012] The laser sensor is connected to the relay, so that the relay controls the opening and closing of the normally open point according to the sensing signal of the laser sensor. The controller connected to the driving mechanism in the connecting track is electrically connected to the relay, and turns on or off the signal transmission with the placement machine according to the power-on state of the relay, thereby controlling the start and stop of the connecting track.

[0013] In a preferred embodiment of the present invention, the optical sensor is a laser sensor.

[0014] In a preferred embodiment of the present invention, the controller adopts PLC.

[0015] In a preferred embodiment of the present invention, when the optical sensor senses the track width comparison photosensitivity point, the width of the placement machine feed track and the width of the connecting track are consistent; when the optical sensor does not sense the track width comparison photosensitivity point, the track widths are inconsistent.

[0016] In a preferred embodiment of the present invention, the step of width comparison and judgment includes:

[0017] (1) When the laser sensor senses the track width comparison photosensitivity point, it is determined that the width of the connecting track matches the width of the placement machine feed track. At this time, the relay is in the energized state, and the normally open point and the common end of the relay are energized, so that the controller is connected to the placement machine and receives the board request signal sent by the placement machine, and controls the connection track to start to transfer the PCB to the placement machine;

[0018] (2) When the laser sensor cannot respond to the track width comparison photosensitivity point on the moving edge of the NXT, it is judged that the width of the connecting track is different from that of the placement machine feed track, the relay is in the power-off state, the relay normally open point and the common end are in the normally open state, and the controller does not receive the board request signal sent by the placement machine. The connecting track is in a stopped state and the PCB on the track will not be transferred to the placement machine.

[0019] The beneficial effects of the present invention are: using the laser sensor and the track width comparison photosensitivity point to automatically determine whether the width of the connecting track and the placement machine feeding track is consistent, effectively improving the quality and production capacity of the product, reducing the failure rate of placement production, and having a simple structure and easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0021] Figure 1The figure is a schematic structural diagram of a preferred embodiment of a width comparison device for connecting a track and an NXT track according to the present invention. DETAILED DESCRIPTION

[0022] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1 , embodiments of the present invention include:

[0024] A width comparison device for connecting a track and an NXT track comprises a mounting machine feeding track, a connecting track, an optical sensor 1, a controller 2, a relay 3, and a track width comparison photosensor 4.

[0025] The feed track of the placement machine can directly adopt the existing or adjustable width track of the placement machine, which mainly includes a fixed feed side and a movable feed side 5 that can move closer to or away from the fixed feed side, and the track width comparison photosensitivity point is set on the movable feed side.

[0026] The connecting track can directly adopt the existing adjustable width track to deliver the PCB board on the previous workstation to the placement machine. It mainly includes a connecting fixed side and a connecting movable side 6 that can move closer to or away from the connecting fixed side, and the optical sensor for sensing the track width comparison photosensitivity point is set on the connecting movable side to determine whether the width of the connecting track is consistent with the width of the placement machine feed track.

[0027] If the optical sensor detects the track width comparison photosensitivity point, it is determined that the width of the placement machine feed track is consistent with the width of the connecting track, and the connecting track transfers the PCB board to the placement machine feed track; conversely, if the optical sensor cannot detect the track width comparison photosensitivity point, the track widths are inconsistent, and the connecting track does not transfer the PCB to the NXT.

[0028] Further preferably, the optical sensor is a laser sensor.

[0029] The signal line of the laser sensor is connected to the voltage coil of the relay to control the opening and closing of the normally open point of the relay through the induction signal of the laser sensor. The controller connected to the driving mechanism in the connecting track is electrically connected to the relay. The opening and closing of the normally open point of the relay (that is, the power-on state of the relay) turns on or off the placement machine to send a board request signal to the controller, thereby controlling the start and stop of the connecting track through the controller.

[0030] Further preferably, the controller adopts PLC.

[0031] Working principle of a width comparison device for connecting rails and NXT rails:

[0032] (1) When the width of the connecting track matches that of the placement machine feed track, the laser sensor senses the track width comparison photosensitivity point on the moving side of the NXT. At this time, the coil voltages of the relay pins 13 and 14 are connected, and the relay is in the energized state. The normally open point 5 of the relay and the common terminal 9 are attracted, so that the PLC module on the connecting track is connected to the placement machine and receives the board request signal sent by the NXT. When the connecting track and the NXT are in operation, the connecting track automatically transmits the PCB to the NXT device.

[0033] (2) When the width of the connecting track is different from that of the placement machine feed track, the laser sensor cannot respond to the track width comparison photosensitivity point on the moving side of the NXT, the relay is in the power-off state, the relay normally open point 5 and the common terminal 9 are in the normally open state. At this time, although the connecting track is in the running state, the PLC module of the connecting track does not receive the board request signal sent by the placement machine, and the connecting track motor is still in the stopped state, and the PCB on the track will not be transferred to the NTX device.

[0034] The beneficial effect of the width comparison device for connecting rails and NXT rails of the present invention is that: a laser sensor installed on the connecting rail sends a light source to illuminate the rail width comparison photosensitivity point and obtains a feedback signal, so that the connecting rail can automatically identify whether the width is consistent with the NXT feeding rail. Only when the two are consistent can the ordinary rail transfer the PCB to the NXT, thereby avoiding product quality problems caused by the board falling into the NXT due to inconsistent widths of the front and rear rails caused by frequent line changes and the NXT not changing the program, and avoiding the NXT from causing malfunctions and damage caused by this.

[0035] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A width comparison device for connecting rails and NXT rails, characterized in that: include: SMT feeding track, connecting track, optical sensor, controller, relay, track width comparison photosensor, The feed track of the placement machine includes a feed fixed side and a feed moving side that moves closer to or away from the feed fixed side, and the track width comparison photosensitivity point is set on the feed moving side. The connecting track includes a connecting fixed side and a connecting movable side that moves closer to or away from the connecting fixed side, and the optical sensor for sensing the track width comparison photosensitivity point is arranged on the connecting movable side to determine whether the width of the connecting track is consistent with the width of the placement machine feed track. The optical sensor is connected to the relay, so that the relay controls the opening and closing of the normally open point according to the sensing signal of the optical sensor. The controller connected to the driving mechanism in the connecting track is electrically connected to the relay and turns on or off the signal transmission with the placement machine according to the power state of the relay, thereby controlling the start and stop of the connecting track; The optical sensor uses a laser sensor, and the steps of width comparison and judgment include: (1) When the laser sensor senses the track width comparison photosensitivity point, it is determined that the width of the connecting track matches the width of the placement machine feed track. At this time, the relay is in the energized state, and the normally open point and the common end of the relay are energized, so that the controller is connected to the placement machine and receives the board request signal sent by the placement machine, and controls the connection track to start to transfer the PCB to the placement machine; (2) When the laser sensor cannot respond to the track width comparison photosensitivity point on the moving edge of the NXT, it is judged that the width of the connecting track is different from that of the placement machine feed track, the relay is in the power-off state, the relay normally open point and the common end are in the normally open state, and the controller does not receive the board request signal sent by the placement machine. The connecting track is in a stopped state and the PCB on the track will not be transferred to the placement machine.

2. A width comparison device for connecting rails and NXT rails according to claim 1, characterized in that: The controller adopts PLC.

3. A width comparison device for connecting rails and NXT rails according to claim 1, characterized in that: When the optical sensor senses the track width comparison photosensitivity point, the width of the placement machine feed track and the width of the connecting track are consistent; when the optical sensor does not sense the track width comparison photosensitivity point, the track widths are inconsistent.

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