Three requirements for the structure of wheel hub molds for automated component retrieval

Three requirements for the structure of wheel hub molds for automated component retrieval
When using automated picking up, the mold should reserve space for claw avoidance, ejection synchronization signal, and picking positioning surface. If one of these is missing, the mold will frequently collide or drop off.
Claw avoidance space should be reserved in advance
The thickness of the picking claw is usually 60-120mm, and this space should be left between the mold parting surface and the machine column.
If not considered during design, the claw cannot enter and can only be modified to a smaller claw or machine, both options are costly.
The larger the diameter of the wheel hub, the longer the claw opening stroke. For wheel types over 20 inches, it is recommended to have a clearance space of no less than 150mm.
The top out synchronization signal must be dockable
Automated pick-up relies on the push out in place signal. The mold needs to reserve a proximity switch installation position that can truly reflect the top plate travel.
The signal was picked up early, and the casting has not yet detached from the mold cavity. It fell off as soon as the claw grabbed it. It's too late, the casting has fallen back, and we can't catch it either.
The signal delay often needs to be adjustable within the range of 0-3 seconds. The demolding resistance of different wheel types is different, and the fixed delay cannot be universal.
The positioning surface of the pickup determines the gripping accuracy
Claw grasping requires a stable positioning surface. The inner edge of the wheel rim or the center of the wheel hub are common choices, and the recommended roughness for the positioning surface is within Ra6.3.
If there are gaps or aluminum adhesive on the positioning surface, the claws will shift. If the deviation is more than 2mm, it will collide when placed in the material frame.
Xinfeng Mold will mark the positioning surface of the parts and the allowed seam height on the automated wheel hub mold, which is convenient for integrators to design claws.
Beat matching
The pick-up process usually takes 8-15 seconds. Compared to the 8-12 minute single-mode cycle, the proportion is not high, but it will affect the overall rhythm.
The pick-up and mold opening can partially overlap. Start the claw downward 2-3 seconds before the mold is in place, which can save 3-5 seconds.
The overlap time cannot be too long, otherwise the claws will interfere with the mold opening action. It is recommended to leave a safety margin of at least 1 second.
Safety interlock
Automated pick-up must be interlocked with machine safety. The claw has not exited, and the machine cannot be closed.
It is recommended to use dual channels for interlocking signals, which can still provide protection when a single channel fails. This is a basic requirement for device safety.
The position of the grating and safety door also needs to be reviewed. After adding a pick-up mechanism, the original safety range may be exceeded.
Feasibility of renovating old molds
The common practice for adding automation to old molds is to install transition plates and signal brackets without modifying the cavity.
The renovation cost usually ranges from 20000 to 60000 yuan, with a cycle of 7-15 days. If the top out structure needs to be modified, the cost will double.
Before renovation, it is necessary to confirm whether there is enough space on the top plate to install sensing blocks. There is no space available, so we can only modify the roof, which requires a lot of work.
Practical tips
It is recommended to use aluminum alloy or nylon pads for the claw material to avoid pinching the wheel rim. Direct contact between steel claws can easily leave pressure marks.
The picking cycle and mold opening signal should be coordinated. First, run 20 times empty to confirm there is no interference, and then run with the parts.
Frequently Asked Questions
Q: How much space should be left for automated pickup?
Answer: The thickness of the claw is 60-120mm, and it is recommended to leave at least 150mm.
Q: How to obtain the output signal?
Answer: Use a proximity switch to reflect the actual travel of the top plate.
Q: Does the signal delay need to be adjustable?
Answer: Yes, the range is 0-3 seconds, and the resistance varies for different wheel types.
Q: Where should I choose the pick-up location surface?
Answer: The inner edge of the wheel rim or the center of the wheel hub is within Ra6.3.
Q: Can old molds be automated?
Answer: Yes, the renovation cost is 20000-60000 yuan, and the cycle is 7-15 days.
Q: How long does it take to pick up the package?
Answer: Usually 8-15 seconds, which can overlap with the mold opening part.
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