Send Message
Home ProductsTensile Testing Machines

Laboratory Spring Hammer Impact Testing Machine Calibration Device OEM

Certification
China Dongguan FREETO Medical Technology Co., LTD certification
China Dongguan FREETO Medical Technology Co., LTD certification
Customer Reviews
The box structure is beautiful and generous, and the use of no reaction handle, simple operation, temperature and humidity stable operation, high accuracy. Explain the operation method of the equipment in detail, very good

—— Masood Rehman

I must confess you have a brilliant customer relations skills and i am learning from you. I tell you if you want to see how beautiful Zambia in Africa

—— Dr Claude VILLETTE -----France

Thanks always giving me good products. thanks for your effort you done before. your firend from Egypt.

—— Waleed-Egypt

I'm Online Chat Now

Laboratory Spring Hammer Impact Testing Machine Calibration Device OEM

Laboratory Spring Hammer Impact Testing Machine Calibration Device OEM
Laboratory Spring Hammer Impact Testing Machine Calibration Device OEM Laboratory Spring Hammer Impact Testing Machine Calibration Device OEM Laboratory Spring Hammer Impact Testing Machine Calibration Device OEM

Large Image :  Laboratory Spring Hammer Impact Testing Machine Calibration Device OEM

Product Details:
Place of Origin: China
Brand Name: GSKA
Certification: CE
Model Number: Universal Tensile Testing Machine
Payment & Shipping Terms:
Minimum Order Quantity: negotiate
Price: negotiate
Packaging Details: The outer packing is first packed with foam plastic, and then reinforced with strong wooden cases.
Delivery Time: 15-20working days after received deposit
Payment Terms: L/C, T/T
Supply Ability: 150 Set / Sets per Month

Laboratory Spring Hammer Impact Testing Machine Calibration Device OEM

Description
Place Of Origin: Dongguan China Accuracy: 0.01J
Guide Groove Diameter: 51mm Trigger Distance: >30mm
Brand Name: GSKA The Maximum Measuring Range: 0-2J
The Energy Loss Of The Pendulum: <0.002J Operating Environment: 25 ±5℃
High Light:

Impact Test Bench

,

Vibration Test Bench

Laboratory Spring Hammer Impact Testing Machine Calibration Device OEM

 

Product information:


The Calibration device for spring hammer is designed and manufactured according to the standard requirements of IEC60068-2-75 and GB2423.55, it is used for the calibration of the spring hammer testers between 0 and 2 J.


Because it is difficult to measure directly for the offered energy of the calibrated spring hammer, the calibration principle of this device is by comparing the energy which is calculated by the mass of the pendulum and drop height.


The highest resolution capability of this device is 0.01J. The release mechanism is improved in the design, it can maximum reduce vibration affect on the test when the the spring hammer lease, the pendulum rod and aerospace bearing are made of imported good quality steel, so that to improve the precision and stability of the device.

Technical parameters:

 

Accuracy 0.01J
The maximum measuring range 0-2J
Impact energy Max. 2J
Guide groove diameter 51mm
The energy loss of the pendulum <0.002J
Trigger distance >30mm


Notice and maintenance:

1.The pendulum rod can not have any swing before the spring hammer tester is triggered.


2.Stop swinging the release wheel after the spring hammer tester is triggered


3.Operating environment: 25 ±5℃ , temperature 60-80%, prevent vibration.Procedure for the calibration of spring hammers:


Principle of calibration:


The principle of this calibration procedure is to compare the energy provided by a spring hammer, which is difficult to measure directly, to the energy of a pendulum, calculated from its mass and height of fall.

Construction of the calibration device:


The assembled calibration device is shown in figure B.1. Apart from the frame, the main parts are a bearing “a”, a drag pointer “b ”, a pendulum “c”, a release base “d” and a release device “e”.


The main part of the calibration device is the pendulum “c” shown in figure B.2. To the lower end of this pendulum is fixed a steel spring with the details shown in figure B.3. The spring is of spring steel, requiring no special treatment, and is rigidly fixed to the pendulum “c”.
Figure B.4 shows some parts on a large scale

It should be noted that this spring is designed for calibrating spring hammers having characteristics as defined in table 1 for energy values equal to or less than 1 J. For calibrating spring hammers having characteristics as defined for 2 J, the spring of the pendulum of the calibrating device would need to be of a different design.

In order to obtain suitable friction characteristics of the pointer, a piece of thick woven cloth is placed between the metal surfaces of the bearing, the piano wires being bent in such a way that a small force is exerted against the cloth.
Because the release device is removed during the calibration of the calibration device, the release device is fixed to the release base by means of screws.

Method of calibration of the calibration device:


The calibration of the calibration device is effected by using a calibration striking element “g” taken from a spring-hammer, as shown in figure B.5. Before calibration, the release device is removed from the calibration device.

The calibration striking element is suspended by four linen threads “h” from suspension points situated in a horizontal plane, 2000 mm above the point of contact between the pendulum and the calibration striking element when the latter is in its rest position. The calibration striking element is allowed to swing against the pendulum and the point of contact under dynamic conditions, point “k”, shall be not more than 1 mm below the point of contact in the rest position. The suspension points are then raised over a distance equal to the difference between both contact points.

When the suspension system is adjusted, the axis of the calibration striking element “g” shall be at right angles to the impact surface of the pendulum “c” and the calibration striking element shall be horizontal at the moment of impact.

When the calibration striking element is in its rest position, the calibration device is placed so that point “k” is positioned exactly at the head of the calibration striking element.

To obtain reliable results, the calibration device is rigidly fixed to a massive support, for example to a structural part of a building.

The height of fall is measured at the centre of gravity of the calibration striking element and the measurement can be facilitated by using a liquid level device consisting of two glass tubes “j” which are interconnected by means of a flexible hose. One of the glass tubes is fixed and provided with a scale “I”.

The calibration striking element may be held in its upper position by means of a thin thread “m” which, when ruptured, causes the release of the calibration striking element.

For scaling the calibration device, a circle is drawn on the scale plate, the centre of this circle coinciding with the bearing of the pendulum and its radius being such that the circle extends to the drag pointer. On this circle, the zero point 0 J shown in figure B.6 is marked at the point indicated by the drag pointer when the latter is brought into contact with the pendulum in the rest position.

The calibration is made with an impact energy of 1 J, which is achieved with a height of fall of 408 mm ± 1 mm, with a calibration striking element of 250 g.

The point on the scale plate corresponding to 1 J is obtained by allowing the suspended calibration striking element to swing against the point “k” on the spring of the pendulum. After hitting the pendulum, the calibration striking element shall not move. The operation is repeated at least 10 times and the 1 J point is the average of the indications of the drag pointer.

The other pints of the scale are then determined as follows:
a) A straight line is drawn through the centre of the circle and the 0 J point;
b) The orthogonal projection of the 1 J point on this line is indicated by P;
c) The distance between the points 0 J and P is divided into 10 equal parts;
d) Through each dividing point, a line is drawn perpendicular to the line 0 J-P;
e) The intersections between these lines and the circle correspond to values of impact energy equal to 0.1 J; 0.2 J; up to 0.9 J.
The same principle can be used for extending the scale beyond the 1 J point. The division of the scale plate “f” is shown in figure B.6.

Use of the calibration device:


The spring hammer to be calibrated is put in the release base and is then operated three times by means of the release device; it shall not be released manually.

For each operation, the striking element of the spring hammer to be calibrated is turned in a different position. The average value of the three readings on the calibration device is taken to be the actual value of the impact energy of the specimen.


Laboratory Spring Hammer Impact Testing Machine Calibration Device OEM 0

Laboratory Spring Hammer Impact Testing Machine Calibration Device OEM 1

 

Customer Support Services:


Ø Installation


Ø Training (Training customer employees)


Ø Calibration


Ø Preventative maintenance


Ø Replacement parts


Ø Assistance via phone or internet


Ø On-site diagnosis and repair/online diagnosis and repair

Contact Details
Dongguan FREETO Medical Technology Co., LTD

Contact Person: Ms. Kris Zhang

Tel: 0086-0769-85914911

Send your inquiry directly to us (0 / 3000)