Drilling Machine Spindle Feed Mechanism with Self-Adaptive Transmission
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Solution Overview
Problem
Conventional spindle automatic feed mechanisms in drilling machines have complex structures, limited feed range, and require manual adjustment for different drilling diameters and spindle speeds, making them inconvenient to operate, especially when stepless speed regulation is implemented.
Innovation Solution
A spindle automatic feed mechanism with self-adaptive electromechanical transmission, comprising a head housing assembly, an elevating axis assembly, and a large motor, which uses an independent electromechanical transmission mechanism to drive the spindle system for automatic feeding, with a fixed feeding speed that adapts to different spindle rotational speeds and drill diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a stepped gearbox is used to separate the drive chain from the main drive chain, then the spindle automatic feeding can be achieved with a fixed transmission ratio, but the structure becomes complicated and the span range of the feed amount is small
Solution Approach 1:
The patent replaces the conventional stepped gearbox mechanical transmission system with an electromechanical transmission system. The feed amount is controlled by electrical signals from the numerical control device rather than mechanical gear shifts, simplifying the overall structure while maintaining automatic feeding capability. The motor-driven feed mechanism eliminates the need for complex stepped gearboxes and manual transmission ratio changes.
2Ease of operation
If a stepped gearbox with fixed transmission ratio is used, then the spindle automatic feeding can be implemented, but the span range of the feed amount is small and manual adjustment is required for different drilling diameters and spindle speeds
Solution Approach 1:
The patent implements a dynamic feed control system where the feed amount is no longer fixed by mechanical gear ratios but can be dynamically adjusted through electrical control. The numerical control device calculates and commands different feed amounts based on real-time drilling parameters such as drilling diameter and spindle speed, allowing the system to adapt continuously to different operating conditions without manual intervention or physical gearbox changes.
Solution Approach 2:
The system changes the control parameter from fixed mechanical transmission ratios to variable electrical control signals. The feed amount becomes a controllable parameter that can be modified by the numerical control device according to the specific drilling task, enabling a wide span range of feed amounts from small feed rates for large diameter drills to larger feed rates for small diameter drills, all without changing the physical transmission structure.
3Manufacturing precision
If manual adjustment of feed amount is required for different drilling diameters and spindle rotational speeds, then the transmission ratio can be optimized for each case, but the operation becomes inconvenient especially with stepless speed regulation
Solution Approach 1:
The system implements self-service automatic feed control where the numerical control device automatically calculates and adjusts the feed amount based on the selected drilling diameter and spindle speed, eliminating the need for manual intervention. The operator simply selects the drilling parameters, and the system automatically determines the appropriate feed rate, making the operation convenient even with stepless speed regulation. The system serves itself by automatically optimizing the feed amount for each operating condition.
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 mechanism achieves self-adaptive spindle feed amounts corresponding to various spindle rotational speeds, ensuring suitable feed amounts even with stepless speed regulation, thereby enhancing operational convenience and efficiency.
Implementation Method 1
The cam is connected to the left end face clutch gear through a pin. The cam is provided with a control handle, and a disc spring is provided between the cam and the left end face clutch gear.
Implementation Method 2
a disc spring is provided between the cam and the left end face clutch gear
Implementation Method 3
An output end of the reducing motor is connected with the first worm, the first worm is meshed with the first worm gear, and one end of the turbine shaft is connected and provided at a center of the first worm gear.
Implementation Method 4
A first v-belt pulley is connected with an upper end of the spindle assembly... A second v-belt pulley is connected to an upper output end of the large motor
Implementation Method 5
the first cylindrical gear is meshed with the left end face clutch gear, and the second cylindrical gear is meshed with the right end face clutch gear
Data Source
AI summary
A spindle automatic feed mechanism of drilling machine with self-adaptive electromechanical transmission comprises a head housing assembly, an elevating axis assembly, and a large motor. The head housing assembly comprises a spindle assembly, a spindle sleeve, a reducing motor, a first worm, a first worm gear, and a turbine shaft. The elevating axis assembly comprises an elevating axis, a first cylindrical gear, a second cylindrical gear, a left end face clutch gear, a right end face clutch gear, and a cam. A second v-belt pulley is connected to an upper output end of the large motor. The invention adopts the independent electromechanical transmission mechanism to drive a spindle system to realize spindle automatic feeding, the feeding speed is fixed. Every rotational speed of the spindle has a suitable self-adaptive spindle feed amount correspondingly.