- The manipulator provides motion capability, while the tooling establishes contact and force transfer with the workpiece. Check their compatibility together during selection.
- Tooling design focuses on gripping reliability, surface protection and ease of operation, each matched to the actual operating conditions.
- Side-clamping, vacuum, internal-expansion, hook, support and turning tooling each have specific application conditions. Select them according to contact and motion requirements.
- Poor tooling design can cause dropped parts, scratches, deformation, positioning errors and excessive operating effort. Design tooling together with the manipulator.
The manipulator's load capacity, working radius and stroke define its motion envelope. The tooling determines contact, load transfer, positioning, turning and placement. Select them as a complete system, checking both motion coverage and whether the workpiece can be gripped and released as required.
01Why tooling and manipulator selection go together
In addition to load, radius and stroke, define requirements for grip stability, scratching and deformation limits, fixture location, turning and operating effort. These are achieved mainly through tooling structure and contact methods. Design the manipulator and tooling together rather than matching only the main machine parameters.
A manipulator can use different end structures: side clamping for boxes and housings; vacuum gripping for compatible sheets, cartons and flat workpieces; internal expansion for bored or cylindrical parts; and hooks for reliable lifting points or holes. Add a turning mechanism where orientation adjustment is required, and verify the specific application conditions for each tooling type.
02How custom tooling affects performance
Gripping reliability: first record workpiece shape, weight, dimensions, center of gravity and material, then determine the contact and support method. Regular parts may suit side clamping, support or vacuum gripping. Irregular parts require design around load-bearing faces, locating surfaces and clearance.
Surface protection: for coated, aluminum, die-cast and electronic parts, check permitted contact locations, contact materials and clamping forces to prevent indentations, scratches and local deformation.
Ease of operation: configure tooling together with handles, buttons, pneumatic circuits and safety protection. Clamping, release, turning, vacuum confirmation and interlocks must follow the operating sequence so that unsuitable positions or logic do not increase effort or operating-error risks.
03Common tooling types and applications
- Side-clamping tooling: suited to regular boxes, housings and some automotive parts with reliable side gripping faces. Check gripping-surface strength and deformation limits.
- Vacuum tooling: can be paired with vacuum lifters for compatible sheets, cartons and flat-surfaced workpieces. Check flatness, holes, oil, dust and permeability.
- Hook tooling: for workpieces with lifting holes, lugs or reliable attachment points. Verify lifting-point strength, center of gravity and anti-disengagement measures.
- Internal-expansion tooling: suited to bored, cylindrical or ring-shaped workpieces such as some motor stators. Check inner-wall strength, expansion stroke and release clearance.
- Support tooling: for workpieces that can be supported from below and whose surfaces are unsuitable for clamping or vacuum gripping. Account for sliding, tipping and the tooling withdrawal path.
- Turning tooling: used for reorientation, inversion, inclined assembly or orientation adjustment. Assess center-of-gravity changes, travel-limit protection and the operating method during design.
04Risks of unsuitable tooling design
Poorly chosen gripping points can cause slip; unsuitable suction-cup quantities or locations can cause unstable vacuum holding; incorrect internal-expansion locations can damage inner walls; and failure to account for center-of-gravity changes can impair turning. These issues can also appear as dropped parts, scratches, deformation, poor positioning or excessive operating effort.
Beyond the structure, check the air supply, clamping detection, release logic and protection against accidental button operation. Problems involving load-bearing tooling, safety interlocks, pneumatic control modules, vacuum sensing or turning mechanisms should be assessed by the manufacturer or qualified personnel.
05Custom tooling design checklist
| Item | Information to provide | Design implications | Precautions |
|---|---|---|---|
| Workpiece weight | Individual weight and weight variation | Tooling load capacity and manipulator selection | Include tooling self-weight |
| Workpiece dimensions | Length, width, height, appearance drawings or photos | Tooling structure and clearance | Provide photographs of irregularly shaped parts |
| Workpiece material | Metal, plastic, cardboard, sheet material, etc. | Clamping method, contact material | Control clamping force on deformable materials |
| Surface condition | Flatness, oil, holes and temperature | Feasibility of vacuum gripping or mechanical clamping | Inconsistent surfaces can impair vacuum holding |
| Handling movements | Pickup, placement, translation, turning and assembly | Turning mechanism and button logic | More complex movements require more detailed checks |
| Workstation | Pickup point, placement point and equipment envelope | Working radius and interference assessment | Assess against the site layout |
06Common tooling problems and risks
| Symptom | Possible Causes | Effect | Recommended action |
|---|---|---|---|
| Unstable gripping | Unreasonable clamping points and insufficient air pressure | Slipping or dropped parts | Review gripping locations and pneumatic circuit condition |
| Surface scratches | Unsuitable contact materials or structures | Appearance defects and rework | Improve 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 locating datum or misaligned tooling | Affects assembly and loading and unloading | Add positioning structure or guide design |
| Excessive operating effort | Unsuitable handle position or button logic | Reduced operating efficiency | Improve operator reach and control placement |
| Unstable vacuum holding | Unsuitable suction-cup layout or oil on the surface | Alarms or loss of grip during handling | Review suction cup selection and workpiece surface |
