Decoring Hammer with Pneumatic Compressor for Controlled Impact
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Solution Overview
Problem
Existing devices for decoring cast workpieces lack the ability to set a defined impact frequency, resulting in suboptimal energy transfer during the core shattering process.
Innovation Solution
A device with a direct flow connection between the hammer and a piston compressor allows for adjustable impact frequency, utilizing a gas or liquid working medium and a double-acting piston compressor to ensure synchronized energy transfer, and incorporating vent openings to prevent air cushion braking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a hammer is used to shatter the core in known devices, then the core can be removed from the cast workpiece, but no defined impact frequency can be set resulting in suboptimal energy transfer
Solution Approach 1:
The patent applies pneumatic principles by using a piston compressor connected via a direct flow connection to the hammer mechanism. Compressed gas drives the piston, which in turn drives the hammer, enabling controlled impact frequency through adjustment of the piston compressor's operating parameters while maintaining simple operation
Solution Approach 2:
The patent enables adjustment of the impact frequency by changing operational parameters of the piston compressor (such as stroke rate or pressure), allowing optimization of energy transfer to the hammer without complicating the device structure or operation
2Loss of energy
If the ram is prevented from being braked by air cushion, then better energy transfer from ram to hammer head is achieved, but the working medium must be vented to environment
Solution Approach 1:
The patent extracts or removes the harmful air cushion effect by providing vent openings that allow the working medium (air) to escape from the working cylinder. This prevents the formation of a braking air cushion between the ram and hammer head, ensuring maximum energy transfer while the vented air is discharged to the environment
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 targeted and optimal energy transfer to the core, allowing for efficient core shattering with adjustable impact frequency and improved energy input.
Implementation Method 1
a cyclically operating piston compressor (8) having a working volume (7a, 7b) and a working cylinder (5) in which a gas or gas mixture or liquid is used as working medium
Implementation Method 2
The working cylinder (5) is in permanent flow connection with the working volume (7a, 7b) of a cyclically operating piston compressor (8)
Implementation Method 3
a hammer (3) having a hammer head (4) and a ram (6) for the transmission of energy to the hammer head (4)
Data Source
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AI summary
The invention relates to a device (1, 1a,..., 1c) for removing the core from a cast workpiece (2), said device (1) comprising at least one hammer (3), the at least one hammer (3) being equipped with a hammer head (4) and at least one tappet (6) that transmits energy to the hammer head (4) and is arranged so as to be movable in a working cylinder (5) of the hammer (3), the working cylinder (5) being in permanent fluid connection with at least one working volume (7a, 7b) of a cyclically operated piston compressor (8).