Vehicle Seat Headrest Assembly with Open-Cover Robotic Insertion
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Solution Overview
Problem
Existing methods for assembling a headrest for a vehicle seat are inefficient and lack automation, leading to inconsistent quality and low production efficiency.
Innovation Solution
An automated assembly method and device that utilize conveying devices, machine arms, and specialized tools to handle and assemble headrest components, including a cover, head box, and upholstered parts, with features like vacuum deflation and seam orientation to ensure precise and consistent assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automated assembly devices are introduced, then productivity and consistency are improved, but device complexity increases
Solution Approach 1:
The assembly device is divided into multiple independent machine arms, each responsible for specific tasks (cover handling, head box insertion, closure operation). This modular segmentation allows high automation while managing complexity through functional decomposition.
Solution Approach 2:
The conveying device serves multiple functions: it transports holders between workstations, positions them for assembly operations, and coordinates the sequence of operations. This multi-functionality reduces the need for separate dedicated devices for each function.
2Manufacturing precision
If manual assembly methods are used, then device complexity is reduced, but manufacturing precision and quality consistency deteriorate
Solution Approach 1:
The holder is designed with integrated fastening means that automatically engage with the cover and head box components during the assembly process. This self-service mechanism ensures consistent positioning and assembly quality without requiring complex manual adjustment devices.
3Productivity
If automation is increased, then productivity is improved, but ease of operation deteriorates
Solution Approach 1:
The conveying device acts as an intermediary that automatically positions holders and coordinates between different machine arms. This mediator simplifies the overall operation by managing the complexity of coordinating multiple automated components, making the system easier to operate despite high automation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables high-volume, high-quality assembly of headrests with improved consistency and reduced manual intervention, leveraging gravity and mechanical assistance for efficient component alignment and smoothing.
Implementation Method 1
fastening means for fastening in each case two pairs of edge regions of the cover opposite one another are formed on the holder
Implementation Method 2
The conveying device transports the holder together with the cover attached to it to the individual workstations
Implementation Method 3
a pre-assembled head box assembly is fed from a storage to the conveying device and mounted in an inner space of the cover through the opening of the stretched cover
Implementation Method 4
The opening is closed by means of a closing device. The closing device comprises, for example, at least one machine arm for closing. Closure means are formed on edge regions of the opening, or the opening is closed by sewing of the edge regions
Implementation Method 5
After closing the cover, the headrest is fastened to the holder, e.g. by means of a fixing device
Data Source
AI summary
A method for the semi-automated assembly of a headrest for a vehicle seat, including the following method steps: feeding a cover stretched in a holder of the headrest to a conveying device, which cover includes an opening, such that an edge region of the opening is held open by the holder in such a way that a head box can be inserted into an inner space of the cover; transporting the holder in the conveying device to at least one workstation; feeding and mounting of an upholstered part; orienting seam edges of the cover; automatic assembly of a head box assembly in an inner space of the pocket-like cover; closing the opening of the cover; removing the headrest from the holder; removing the holder from the conveying device; and performing an ironing process.