CN210519376U - Vision centering mechanism and chip mounter with same - Google Patents

Abstract

The utility model discloses a vision centering mechanism and chip mounter, this mechanism includes: the bracket is provided with a driving device, a transmission mechanism, a moving shaft and a camera shooting assembly arranged on the moving shaft; the driving mechanism is connected with the output end of the driving device, the movable shaft is slidably arranged on the bracket and connected to the driving mechanism, and the movable shaft is driven by the driving mechanism to slide on the bracket along the driving direction of the movable shaft, so that the camera shooting assembly is driven to reciprocate back and forth; the camera shooting assembly comprises a reflector and a camera, a lens of the reflector forms an angle of 45 degrees with the horizontal plane, vertically downward light rays reach a lens of the camera after being reflected by the reflector, and the motion track of the reflector is located below an object to be shot. The utility model discloses locate the subassembly of making a video recording and can follow the gliding removal of two guide rails epaxially, make it realize the shooting to a plurality of pick-up heads at the quick slip in-process, greatly improved work efficiency.

Description

Vision centering mechanism and chip mounter with same

Technical Field

The utility model relates to an automated production equipment especially relates to a vision centering mechanism and be equipped with chip mounter of this mechanism.

Background

With the demand of electronic equipment for small size, light weight, thin shape and high reliability, various new devices, especially fine pitch and fine pitch devices, are rapidly developed and are increasingly used in various electronic equipment, so that higher requirements are put on the chip mounting precision of a chip mounter, a key device in surface Mount technology (smt). As an important component of a chip mounter, a vision centering system has a great influence on the overall performance of the chip mounter. The high-performance chip mounter in the market at present generally adopts a visual centering system, wherein the visual centering means that a pick-and-place head on a chip mounter head sucks a component, and the component is centered by a camera fixed on the chip mounter head or a certain position on a machine body in the process of moving to a pasting and placing position. The utility model discloses an application number is 2016203375850 utility model discloses a "chip mounter flight centering structure", this technique is through setting up mobilizable prism in pick-and-place head below, removes the prism when the pick-and-place head reduces promptly, and components and parts are inhaled, and the pick-and-place head that moves back when the pick-and-place head goes up realizes the flight centering to taking the image, has improved production efficiency. The structure is suitable for chip mounters with one or two ends, when the number of the chip mounters is increased to 3 or more, the reflecting prism needs to occupy a lot of space due to the transverse movement, so that the distribution density of the chip mounters cannot be large, a plurality of moving parts are provided, the weight of the chip mounters is correspondingly increased, the speed of the multi-head chip mounters is limited, and the adjustment, the maintenance and the cost are higher.

Therefore, developing a vision centering mechanism suitable for a multi-head chip mounter at the same time to meet the requirement of efficient chip mounting is a technical problem which needs to be solved urgently at present.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem above, the utility model provides a vision centering mechanism and be equipped with chip mounter of this mechanism.

The technical scheme of the utility model as follows: the utility model provides a vision centering mechanism, include: the camera shooting device comprises a bracket, a driving device, a transmission mechanism, a moving shaft and a camera shooting assembly, wherein the driving device, the transmission mechanism and the moving shaft are arranged on the bracket; the transmission mechanism is connected with the output end of the driving device, the moving shaft is slidably mounted on the bracket and connected to the transmission mechanism, and the moving shaft is driven by the transmission mechanism to slide on the bracket along the transmission direction of the moving shaft, so that the camera shooting assembly is driven to reciprocate back and forth; the camera shooting assembly comprises a reflector and a camera, wherein a lens of the reflector forms an angle of 45 degrees with the horizontal plane, vertically downward light rays reach a lens of the camera after being reflected by the reflector, and the motion track of the reflector is located below an object to be shot.

Furthermore, two guide rails are arranged at the bottom end of the support, a sliding block is installed on the two guide rails, the sliding block slides along the two guide rails, and the moving shaft is installed on the sliding block.

Further, the transmission mechanism includes: the driving wheel is installed on the output shaft of the driving device, the driven wheel is installed on the support, and the synchronous belt is sleeved on the driving wheel and the driven wheel, and the sliding block is located on the upper section or the lower section of the synchronous belt between the driving wheel and the driven wheel.

Furthermore, a linear displacement sensor is further installed on the support and arranged above the sliding block.

Furthermore, the linear displacement sensor is a grating ruler.

Further, the reflective mirror and the camera are correspondingly mounted at the two ends of the movable shaft in a front-back manner.

Further, the driving device is a motor.

The utility model also provides a chip mounter is equipped with 3 and above pick-and-place head subassemblies, and it installs above vision centering mechanism, vision centering mechanism corresponds pick-and-place head subassembly setting.

According to the above technical scheme, the utility model provides a vision centering mechanism is epaxial through locating the gliding removal of guide rail with the subassembly of making a video recording to utilize drive arrangement to provide power, make the subassembly of making a video recording control round trip movement, realize the shooting to a plurality of pick-up and place heads of chip mounter at the removal in-process, greatly improved paster efficiency, and the design is simple, and maintenance and timing are with low costs. The utility model discloses a vision centering mechanism still is equipped with a linear displacement sensor, picks up the position accurate positioning of putting the head to each, has further improved positioning accuracy. The utility model also provides a chip mounter with this vision centering mechanism, this chip mounter are equipped with three and above pick-and-place head subassembly, and the setting up of vision centering mechanism makes chip mounter's paster efficiency improves greatly, makes the producer follow little batch production xiao liang, but extends to mass production's electron producer.

Drawings

Fig. 1 is a front view of the vision centering mechanism disposed on the chip mounter.

Fig. 2 is a side view of the vision centering mechanism disposed on the chip mounter.

Fig. 3 is a perspective view of the chip mounter equipped with the vision centering mechanism of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1-2, the present invention provides a vision centering mechanism, comprising: the camera module comprises a support 1, a driving device 2, a transmission mechanism 3, a moving shaft 4 and a camera module 5, wherein the driving device 2, the transmission mechanism 3 and the moving shaft 4 are arranged on the support 1, the camera module 5 is arranged on the moving shaft 4, the transmission mechanism 3 is connected with the output end of the driving device 2, the driving device 2 is a motor, preferably a high-speed motor, and the transmission mechanism 3 operates under the driving of the driving device 2. The movable shaft 4 is slidably mounted on the support 1 and connected to the transmission mechanism 3, the movable shaft 4 is driven by the transmission mechanism 3 to slide on the support 1 along the transmission direction, specifically, two guide rails 12 are disposed at the bottom end of the support 1, a slider 11 is disposed on the two guide rails 12, the slider 11 is u-shaped, two side walls of the slider are respectively engaged with the two guide rails 12 and can slide along the two guide rails 12, the movable shaft 4 is mounted on the slider 11, and the slider 11 is fixed on the transmission mechanism 3. The utility model discloses a two guide rail 12 structures, the stability of subassembly 5 of making a video recording when being favorable to promoting the motion promotes and shoots the quality. Specifically, the transmission mechanism 3 includes: a driving wheel (not shown) mounted on the output shaft of the driving device 2, a driven wheel (not shown) mounted on the bracket 1, and a synchronous belt (not shown) sleeved on the driving wheel and the driven wheel, wherein the slide block 11 is positioned on the upper or lower synchronous belt between the driving wheel and the driven wheel. Under the driving of the driving device 2 for positive rotation or negative rotation and the transmission of the transmission mechanism 3, the moving shaft 4 slides back and forth on the two guide rails 12 along with the sliding block 11. The camera assembly 5 comprises a reflective mirror 51 and a camera 52, the camera 52 is a digital industrial camera, the reflective mirror 51 and the camera 52 are correspondingly installed at two ends of the movable shaft 4 in a front-back manner, a lens of the reflective mirror 51 forms an angle of 45 degrees with the horizontal plane, and vertically downward light rays are reflected by the reflective mirror 51 and then reach a lens of the camera 52. Specifically, the movement locus of the reflective mirror 51 is located below, preferably directly below, the pick-and-place head to be photographed. When the reflective mirror 51 is positioned under the pick-and-place head 6 of the chip mounter, part image light rays of the pick-and-place head 6 downwards reach the reflective mirror 51, are horizontally reflected to the camera 52 which is arranged on the movable shaft 4 and corresponds to the reflective mirror 51 after being reflected by a lens of the reflective mirror 51, and the camera 52 shoots, intercepts images and uploads the images to a computer system. It should be noted that when the moving shaft 4 drives the reflective mirror 51 to move to a position right below any pick-and-place head, the camera 52 takes a picture and intercepts the picture, and in this process, the moving shaft 4 continuously moves and does not stop, so a linear displacement sensor 7 is installed on the support 1, the linear displacement sensor 7 is located above the slider 11, the linear displacement sensor 7 is preferably a grating ruler, the grating ruler checks the dynamic position of the reflective mirror 51 in real time, and when the reflective mirror 51 reaches a position right below each pick-and-place head, the camera 52 is triggered to take a picture and intercept the picture. The installation and setting of the grating ruler are set by the prior art, the grating ruler enables light to pass through the mesh grid in a reflection mode to read, and the reading device is composed of a light source, a scribed glass, a grid window and a photodiode receiving device. The output signal is generated by the light source through the grid lines engraved on the linear ruler and then processed by the photoelectric conversion device. The utility model also provides an install more than the chip mounter of vision centering mechanism, the chip mounter is equipped with 3 and above pick-and-place head subassemblies, vision centering mechanism corresponds pick-and-place head subassembly setting. Under the drive of the driving device, the time for the moving shaft provided with the camera shooting assembly to sweep each pick-up and place head is about 17ms, and the pick-up and place head continuously works, so that the patch attaching efficiency is greatly improved.

To sum up, the utility model provides a vision centering mechanism is epaxial through locating the gliding removal of two guide rails with the subassembly of making a video recording to utilize drive arrangement to provide power, make the subassembly of making a video recording control round trip movement, realize in proper order moving the in-process and pick up the shooting of putting the head to a plurality of pick-up of chip mounter, greatly improved paster efficiency, and the design is simple, and maintenance and timing are with low costs. The utility model discloses a vision centering mechanism still is equipped with a linear displacement sensor, to reflector and pick up and put the relative position real-time supervision and the accurate positioning of head, when making the reflector reach each pick up and put under the head, triggers the camera shoots and the intercepting image, has further improved measurement accuracy. The utility model also provides a chip mounter with this vision centering mechanism, this chip mounter are equipped with three and above pick-and-place head subassembly, and vision centering mechanism corresponds pick-and-place head subassembly sets up, and setting up of vision centering mechanism makes chip mounter's paster efficiency improves greatly, makes the producer follow little batch production little factory, but expands to mass production's electron firm.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (8)

1. A visual centering mechanism, comprising: the camera shooting device comprises a bracket, a driving device, a transmission mechanism, a moving shaft and a camera shooting assembly, wherein the driving device, the transmission mechanism and the moving shaft are arranged on the bracket; the transmission mechanism is connected with the output end of the driving device, the moving shaft is slidably mounted on the bracket and connected to the transmission mechanism, and the moving shaft is driven by the transmission mechanism to slide on the bracket along the transmission direction of the moving shaft, so that the camera shooting assembly is driven to reciprocate back and forth; the camera shooting assembly comprises a reflector and a camera, wherein a lens of the reflector forms an angle of 45 degrees with the horizontal plane, vertically downward light rays reach a lens of the camera after being reflected by the reflector, and the motion track of the reflector is located below an object to be shot.

2. The visual centering mechanism of claim 1, wherein said bottom end of said bracket has two guide rails, said two guide rails having a slider mounted thereon, said slider sliding along said two guide rails, said movable shaft being mounted on said slider.

3. The visual centering mechanism of claim 2, wherein said transmission mechanism comprises: the driving wheel is installed on the output shaft of the driving device, the driven wheel is installed on the support, and the synchronous belt is sleeved on the driving wheel and the driven wheel, and the sliding block is located on the upper section or the lower section of the synchronous belt between the driving wheel and the driven wheel.

4. The visual centering mechanism of claim 2, wherein said carriage further mounts a linear displacement sensor, said linear displacement sensor being disposed above said slide.

5. The visual centering mechanism of claim 4, wherein said linear displacement sensor is a grating scale.

6. The visual centering mechanism of claim 1, wherein said mirror and said camera are mounted at opposite ends of said movable shaft in tandem correspondence.

7. A visual centering mechanism as claimed in claim 1 or 3, wherein said drive means is a motor.

8. A chip mounter having 3 or more pick-and-place head assemblies, wherein the visual centering mechanism of any one of claims 1 to 6 is provided, and the visual centering mechanism is provided corresponding to the pick-and-place head assemblies.

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