Machine Tool Coolant Spray Pump With Stationary Focused Nozzle
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Solution Overview
Problem
Existing cooling medium spray devices in machine tools are unable to effectively remove chips and burrs due to low pressure of the cooling medium supplied from the main shaft, and increasing pressure requires costly high-pressure machine tool designs or limited rotational speed of the pump.
Innovation Solution
A cooling medium spray device that includes a body part coupled to the main shaft, a pump with a rotating part, a cap, and a nozzle, which increases the pressure of the cooling medium and sprays it in a focused manner towards a prescribed location, effectively removing chips and burrs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the pressure of the cooling medium supplied from the main shaft is increased to improve chip and burr removal effectiveness, then the chip and burr removal capability is improved, but the machine tool requires high-pressure specifications which increases cost
Solution Approach 1:
The invention extracts the pressure increase function from the main shaft system and relocates it to a portable pump unit. This allows the machine tool to maintain its original low-pressure design while achieving high-pressure cooling medium delivery through the attached pump, thereby improving chip and burr removal without requiring costly high-pressure machine tool modifications
Solution Approach 2:
The portable pump unit acts as an intermediary device between the main shaft's low-pressure cooling medium supply and the workpiece. The pump receives cooling medium at low pressure from the main shaft and converts it to high-pressure spray, serving as a mediator that enables effective chip and burr removal without modifying the main shaft or machine tool structure
2Stress or pressure
If the rotational speed of the pump's rotating part is increased to increase cooling medium pressure, then the cooling medium pressure is increased, but the rotational speed is limited because the spray port rotates together with the main shaft causing centrifugal scattering
Solution Approach 1:
The invention extracts the spray function from the rotating main shaft system and places it in a stationary nozzle on the portable pump unit. This separation allows the pump to operate at high rotational speeds for pressure generation while the nozzle remains stationary, eliminating centrifugal scattering and enabling focused high-pressure spraying
Solution Approach 2:
Instead of rotating the spray port with the main shaft as in conventional designs, the invention inverts the approach by keeping the spray port stationary and achieving rotation-related pressure generation through the pump's rotating part. This inversion prevents centrifugal scattering while maintaining the ability to generate high pressure
3Ease of operation
If a pump with rotating part coupled to the main shaft is used to spray cooling medium, then the cooling medium can be supplied, but the spray is scattered by centrifugal force and cannot be focused on prescribed locations
Solution Approach 1:
The invention extracts the spray function from the rotating system and places it in a stationary nozzle mounted on the portable pump unit. This separation maintains the cooling medium supply capability while eliminating centrifugal scattering, enabling precise focusing of the spray on prescribed locations such as chip accumulation areas and burr generation points
Solution Approach 2:
The stationary nozzle on the portable pump unit serves as an intermediary that receives cooling medium from the rotating pump mechanism and delivers it in a focused manner to specific locations. This intermediary structure decouples the pressure generation (rotating part) from the spray delivery (stationary nozzle), enabling both high pressure and precise positioning
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
The device achieves reliable removal of chips and burrs with increased pressure and focused spraying, reducing the need for manual removal and maintaining a simple, cost-effective configuration.
Implementation Method 1
a pump (300), which increases (pressurizes) the pressure of the cooling medium
Implementation Method 2
a nozzle (240), which sprays (ejects) the pressurized cooling medium toward a prescribed location in a focused manner
Data Source
AI summary
A body member (110) of a coolant medium spray device (100) is attachable to a main shaft (10) of a machine tool. A rotating part of a pump (300) is connected to the body member. The body member and the rotating part are rotatably supported within an interior space of a support part, which may be constituted by a cover (210), a case (220) and a ring member (225). When the body member is attached to the main shaft, the support part is also fixed to the machine tool so that the support part is non-rotatable relative to the machine tool. In this state, cooling medium that is being supplied via the main shaft is pressurized by the pump and then sprayed out of a spray port (242) of a nozzle (240) that is mounted in a nozzle mounting hole (231) of a cap (230) affixed to the support part.