Battery Back Cover Knob MIM Parts
The knob itself has many uses. It is also possible to replace some rotary pulse generators. It is mainly used in the human-machine interface of the front panel of the instrument and the audio-visual control panel. The knob uses a quadrature optical encoder instead of a purely digital device like an analog potentiometer.
Product Introduction
Battery back cover knob MIM Parts | |||||||||
Item | Material | Production Process | Sintering Temperature | Mold | Custom | ||||
Hinge | 304 | Metal Injection Molding | 1350°C-1500°C | To be customized | Yes | ||||
Chemical Composition | C：≤0.08，Si ：≤1.0 Mn ：≤2.0， Cr ：18.0～20.0，Ni ：8.0～10.5， S ：≤0.03，P ：≤0.035 N≤0.1 | ||||||||
Available Materials | Low carbon stainless steel, titanium alloy (Ti, TC4), copper alloy, tungsten alloy, hard alloy, high temperature alloy (718, 713) | ||||||||
Finish | Dimensional Accuracy | Product Density | Appearance Treatment | Appropriate Weight | |||||
Roughness 1～5μm | （±0.1%～±0.5%） | 92～95% | Mirror Reflection | 0.03g～400g） | |||||
Mechanical behavior | Tensile strength σb (MPa)≥515-1035 | ||||||||
Introduction and Analysis of Knobs
1. The knob itself has many uses. It is also possible to replace some rotary pulse generators. It is mainly used in the human-machine interface of the front panel of the instrument and the audio-visual control panel. The knob uses a quadrature optical encoder instead of a purely digital device like an analog potentiometer. Its appearance is similar to the traditional resistance potentiometer or resistance potentiometer, but the internal structure is completely digital and adopts optical technology.
2. The inside of the knob resembles a traditional incremental encoder. There are two quadrature output signals, Channel A and Channel B, that can be directly connected to the encoder's processor chip. The appearance of the switch is cylindrical. The distribution of extension terminals around the "cylinder" is the extension of the static contacts in the "cylinder". The static contacts are evenly distributed in the "cylinder", and there is a layer of structure. And each layer is isolated from each other.
3. In the composition of the knob, the rotating shaft is composed of a rotary handle whose bottom passes through the upper cover, and the switch assembly is clamped and fixed by the bottom plate and the upper cover. It can be rotated 90 degrees, 180 degrees or 360 degrees when in use. Every time it rotates to a position, the moving contact will connect to different static contacts, and output different states on the external terminals, thereby realizing control.
The two balance adjustment nuts at both ends of the beam are used to adjust the balance when the balance is no-load. The beam is equipped with a floating code for weighing below 1g. The bracket on the left side of the pillar can hold objects that are not to be weighed.
The horizontal brake screw knob is used to fix the telescope so that it can be roughly positioned, the horizontal fine-tuning or micro-adjustment knob is used to adjust the exact position, and the telescope micro-handwheel is used to adjust the convex lens to make the observed things clear.
The commonly seen theodolite is an optical theodolite. The horizontal brake screw button is used to fix the telescope to make it roughly positioned. The horizontal fine-tuning or micro-movement button is used to adjust the exact position. things are clear.
There is only one brake screw. After aiming at the target with the crosshair and tightening the brake screw, the level will not be able to rotate horizontally. After loosening it, it can rotate and continue to measure the next target.
The application and structural characteristics of the knob
1. The purpose of the knob
Battery back cover knob MIM Parts are widely used, but its rotation area has certain limitations, mainly due to the effect of resistance value in contact switch conversion. Like traditional black and white TV channels, the volume is adjusted through the knob; the gear control of the electric fan is the knob, and there are several sets of leads inside. By changing the number of coils to wind the resistance of the early fan, the speed of different gears can be changed; the washing and dehydration functions of the washing machine are mostly. Controlled by the knob. The knob of the battery back cover not only plays the role of fixing the battery, but also serves as a switch to connect the negative pole. The threads of the company's metal injection molding process are all one-time molding products without secondary processing.
2. Features
Battery back cover knob MIM Parts has two structures, namely MBB contact type and BBM contact type. The MBB contact contacts the front and rear contacts when it rotates, and the BBM contact contacts the rear contact when it rotates. When the BBM contact contacts the front contact during stepping, the moving contact first disconnects the front contact and then connects the rear contact. During the transposition process, the instantaneous state is that the front and rear contacts are in contact. These dots are broken.
Metal Injection Molding Process
Quality Control
1. Quality control: The defective rate is less than 0.1%.
2. Samples and trial runs will be 100% inspected during production and before shipment, sample inspection for mass production according to ISDO standards or customer requirements.
3. Testing equipment: flaw detection, spectrum analyzer, golden image analyzer, three-coordinate measuring machine, hardness testing equipment, tensile testing machine.
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