Dual-Face Transfer Machine for Complete Workpiece Machining

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Solution Overview

Problem

Conventional transfer machines are unable to completely machine items as one portion is inserted and held by a clamp, making inaccessible parts impossible to process until repositioning allows access.

Innovation Solution

A transfer machine with an item holder table having two opposing front faces, each equipped with clamping means, allowing parallel machining on both sides during rotations, facilitated by manipulator devices to transfer items between clamps for complete processing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If items are held by clamps on a single-face item holder table, then the clamping and machining process is simple, but portions of the item inserted by clamps become inaccessible to machining tools

Engineering Contradiction:
Improveclamping and machining process simplicityVSAvoidcomplete machining capability
Core Design Contradiction:
Ease of operationVSProductivity

Solution Approach 1:

The item holder table is designed with two opposing front faces instead of a single face, allowing items to be clamped and machined on one face while another face provides access to previously hidden portions. This dimensional change from single-face to dual-face configuration enables complete machining of all item surfaces without requiring complex repositioning mechanisms.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Productivity

If items are repositioned by turning over inside clamps to access hidden parts, then complete machining becomes possible, but the process time and complexity increase

Engineering Contradiction:
Improvecomplete machining capabilityVSAvoidrepositioning time
Core Design Contradiction:
ProductivityVSLoss of time

Solution Approach 1:

Items are pre-positioned on the item holder table with portions that will require machining extending beyond the clamp boundaries. The dual-face configuration is prepared in advance, with the second face positioned to provide immediate access to previously hidden portions, eliminating the need for time-consuming repositioning operations during the machining cycle.

Inventive Principle:
Principle #10Preliminary action

3Productivity

If clamps are assembled on the periphery to receive items in two different positions, then complete machining is enabled, but the device complexity increases

Engineering Contradiction:
Improvecomplete machining capabilityVSAvoidclamp arrangement complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The item holder table is segmented into two distinct front faces, each equipped with its own set of clamps positioned to handle items in different orientations. This segmentation allows independent clamping and machining operations on each face, providing complete machining capability while maintaining relatively simple, modular clamp arrangements on each face rather than complex multi-position peripheral clamps.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentEP2234756B1Improved transfer machine and working process
Publication Date: 2011.06.15 BUFFOLI TRANSFER
  • EP2234756B1 patent drawingFigure 1~2
  • EP2234756B1 patent drawingFigure 3~4

AI summary

The invention concerns a transfer machine in which the turning item holder table has a first front face (15) and a second front face (15') facing in opposite directions, wherein the first front face of the item holder table holds a first series of clamping means (16) of the items facing towards a first working units to carry out the first machining operations on each item, and wherein the second front face of the item holder table holds a second series of clamping means (16') of the items facing towards the second working units to carry out the second machining operations on each item. In one of work stations with at least one manipulator device is provided for gripping and transfer of each item from a clamping means on the first front face to a clamping means on the second front face of the item holder table.