- The manipulator body provides motion, while the tooling interfaces directly with the workpiece. A complete handling solution requires the two to work together effectively.
- fixture decisionGripping reliability, surface protection and ease of operationThree major usage effects.
- Different clamps have completely different applicable scenarios: clamping, vacuum, inner support, hook, lifting, and flipping have their own boundaries.
- Unreasonable design will bring risks such as missing parts, scratches, deformation, inaccurate positioning, laborious operation, etc. It should be designed simultaneously with the main body.
In the Pneumatic Industrial Manipulator project, the main body determines the load, working radius, lifting stroke and range of motion, while the custom tooling determines whether the workpiece can be grabbed, transported, turned over and placed safely, stably and accurately. For the actual workstation, whether the fixture matches the workpiece will often directly affect the use of the equipment.
01Why can’t we just look at the manipulator itself?
When selecting a model, many customers first focus on "how heavy it can be hoisted, how large the radius is, and how high the stroke is." These parameters are indeed important, but in real scenes, the problem is often more than "can it be lifted up" - whether the workpiece can be grasped firmly, whether it will be scratched, whether it will deform, whether it can be accurately placed into the tooling, whether it needs to be turned over, and whether the operator can save effort, all of these depend more on custom tooling. The main body provides the movement ability, and the fixture is responsible for direct contact with the workpiece. Only when the two work together properly can a complete solution be formed.
The same Pneumatic Industrial Manipulator can be equipped with a clamping clamp to move boxes or shells; equipped with a vacuum cup, it can be used for plates, cartons or flat workpieces; equipped with an inner support clamp, suitable for hole and cylinder workpieces; equipped with a hook clamp, it can move workpieces with hanging points or holes; equipped with a flip mechanism, it can also realize attitude adjustment. Different fixtures have completely different applicable scenarios.
02custom tooling determine which key effects are used
Crawl reliability: The shape, weight, size, center of gravity, and material of the workpiece will all affect the fixture plan. For regular parts, simpler clamping, lifting or vacuum gripping can be selected; for special-shaped parts, the design must be combined with the stress surface, positioning surface and avoidance space.
surface protection: For workpieces with high surface requirements such as spray-coated parts, aluminum parts, die-cast parts, and electronic parts, the contact position, contact material, and clamping force of the fixture must be carefully designed, otherwise indentations, scratches, or local deformations may occur.
Ease of operation: The fixture needs to be designed in conjunction with the operating armrest, button logic, air circuit control, and safety protection. Actions such as clamping, releasing, flipping, vacuum gripping confirmation, and interlocking protection must comply with operating habits. Otherwise, although the equipment can operate, the operation will be laborious and prone to misoperation.
03Common fixture forms and applicable scenarios
- Clamping fixture: Suitable for workpieces with regular shapes and clampable sides (boxes, shells, some automobile parts). Pay attention to the strength of the clamping surface and whether it is easy to deform.
- vacuum gripping fixture: Commonly used for boards, cartons, and workpieces with flat surfaces, and can be used with vacuum lifters; it is necessary to confirm whether the surface is flat, has holes, oil stains, dust, or is breathable.
- Hook Tooling: Suitable for workpieces with built-in lifting holes, lifting lugs or reliable hanging points. It is necessary to confirm the strength of the lifting points, the position of the center of gravity and the drop-prevention measures.
- Internal-Expansion Gripper: Suitable for workpieces with inner holes, cylindrical or annular shapes (such as some motor stators), pay attention to the inner wall strength, tightening stroke and release space.
- Lifting fixture: Suitable for workpieces whose bottom can be supported and whose surface is not suitable for clamping or vacuum gripping. Slippage, anti-tipping and exit paths must be considered.
- Flipping Tooling: Suitable for working conditions that require reversing, turning over, tilting assembly or changing posture, focusing on evaluating changes in the center of gravity, limit protection and operation methods.
04What risks will unreasonable design bring?
Unreasonable design of custom tooling may lead to problems such as missing parts, scratches, deformation, inaccurate positioning, and laborious operation. For example, improper selection of clamping points leads to slippage during transportation; inappropriate number or position of vacuum suction cups leads to unstable vacuum gripping; unreasonable tightening position of the inner support damages the inner wall; and the flipping mechanism does not fully consider the change in the center of gravity, resulting in uneven flipping. The clamp must also match the air circuit control and safety protection - insufficient compressed-air supply, lack of clamping detection, unreasonable release logic, and failure to consider the risk of accidentally touching the button will all affect stability. Issues involving load-bearing fixtures, safety interlocks, air control modules, vacuum detection and flip mechanisms should be evaluated by the manufacturer or professionals.
05custom tooling design confirmation form
| Confirm items | Customers need to provide information | Affect content | Precautions |
|---|---|---|---|
| workpiece weight | Single piece weight and whether there are weight fluctuations | Fixture load, manipulator selection | The self-weight of the fixture must also be considered |
| workpiece size | Length, width, height, appearance drawings or photos | Clamp structure, avoidance space | It is recommended to provide physical pictures of special-shaped parts |
| workpiece material | Metal, plastic, carton, plate, etc. | Clamping method, contact material | Easily deformable materials require careful clamping |
| surface state | Whether it is flat, oily, holes, high temperature | Feasibility of vacuum gripping or mechanical clamping | An unstable surface reduces vacuum-gripping performance |
| Required Motion | Pick and place, translate, flip, assemble | Flip mechanism, button logic | The more complex the action, the more detailed the confirmation is. |
| On-site work station | Pick-up point, discharge point, equipment boundary | Working radius and interference judgment | Need to be combined with on-site layout assessment |
06Common fixture problems and risks
| Problem phenomenon | Possible Causes | influence | Suggested handling |
|---|---|---|---|
| Work clamp is unstable | Unreasonable clamping points and insufficient air pressure | Risk of slipping and falling parts | Review the clamping position and air path status |
| The surface is scratched | Unsuitable contact materials or structures | Poor appearance, rework | Optimized contact surfaces and protective materials |
| Workpiece deformation | The clamping force is too large or the force is concentrated | Dimensional deviation and assembly difficulties | Adjust the clamping method or add support |
| Incorrect placement | Unclear positioning reference and offset fixture | Affects assembly and loading and unloading | Add positioning structure or guide design |
| Effortless operation | The armrest position and button logic are unreasonable | Decreased usage efficiency | Optimize the human-machine operating position |
| vacuum gripping is unstable | The layout of the vacuum suction cup is unreasonable and there is oil stain on the surface. | Alarm or falling off during transportation | Review suction cup selection and workpiece surface |