一 產品介紹
拉伸沖擊試驗機主要用于在規定的拉伸沖擊速度下,測定塑料試樣斷裂所需能量的測試。 用于測定塑料等非金屬材料的脆性、韌性。
二、拉伸沖擊試驗機特點
1 采用圓光柵測角技術,具有精度高、穩定性好和測量范圍大等特點
2 具有數字化測量計算沖斷功、沖擊強度、計算一批試樣的平均值等功能
3 預仰角、 升角校驗方便
"/> ASTM D1822-2006《使塑料及電絕緣材料斷裂所需的拉伸沖擊能量的測試方法》
ISO 8256-2004《塑料-拉伸-沖擊強度的測定》"/>
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XJL數顯塑料拉伸沖擊性能試驗方法試驗機
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XJL數顯塑料拉伸沖擊性能試驗方法試驗機 
編號: WJ0003
價格: 1000
產品詳情

XJL液晶屏拉伸沖擊試驗機  

一 產品介紹

  主要用于在規定的拉伸沖擊速度下,測定塑料試樣斷裂所需能量的測試。用于測定塑料等非金屬材料的脆性、韌性。

二、特點

1 采用圓光柵測角技術,具有精度高、穩定性好和測量范圍大等特點

2 具有數字化測量計算沖斷功、沖擊強度、計算一批試樣的平均值等功能

3 預仰角、 升角校驗方便

4 顯示方式:液晶觸摸屏        

三、用途:

主要用于在規定的拉伸沖擊速度下,測定塑料試樣斷裂所需能量的測試。 用于測定塑料等非金屬材料的脆性、韌性。

四、符合標準:

GB/T 13525 《塑料拉伸沖擊性能試驗方法》

ASTM D1822-13使塑料及電絕緣材料斷裂所需的拉伸沖擊能量的測試方法

ISO 8256-2004塑料-拉伸-沖擊強度的測定

五、技術參數:

1)沖擊速度:3.8m/s 
2)沖擊能量:15J 、25J任選
3)擺錘力矩:pd15J=8.03848Nm pd25J=13.39746Nm
4)擺錘預揚角:150°
5)打擊中心距:395mm
6)使用溫度:(10~35)℃
7)試樣尺寸:長度80±2mm 寬度15±0.5mm 厚度<4mm
夾具間的自由長度:30±2mm

2)  電源: 220VAC-15%~220VAC 10% 50HZ (單相三線制)

術語:拉伸沖擊強度:試樣受拉伸沖擊力破壞所消耗的沖擊能與試樣試驗前最小橫截面的比值KJ/m2

永久斷裂伸長率:試樣斷裂后1min時斷裂部分拼接所測得的標距相對于原始標距的變化率(%)

工作原理:試樣一端固定在擺錘式沖擊試驗機的夾具上,另一端固定在丁字頭上,由擺錘的單程擺動提供能量,沖擊丁字頭,使試樣在較高拉伸形變速率下破壞,丁字頭與試樣的一部分一起被拋出,測定擺錘消耗的能量及試樣破壞前后的標距,經校正,計算得到試樣的拉伸沖擊強度和永久斷裂伸長率。不同類型或不同尺寸的試樣的試驗結果不能比較。

試驗裝置:

1、試驗機的擺錘必須為剛性擺錘,對2mm厚的試樣,沖擊時必須使擺錘的物理碰撞中心與試樣厚度中心重合。

2、 試驗機的夾具不得使試樣被夾破裂和在試驗中滑動,夾爪可有銼刀樣的齒,齒的尺寸可因試樣而異。

3、丁字頭應由輕質和極低彈性的材料制成,在受沖擊時不得發生塑性型變。

試樣:試樣由注塑或機械加工而成。薄膜或薄片試樣可用沖刀裁取。在制樣過程中不得出現試樣過熱現象。如在機械加工中使用冷卻劑,應不影響試樣性能。試樣應表面無損傷,內部無缺陷,厚度均勻。試樣標距的標記應不影響試樣性能。硬質材料試樣不得扭曲。如被測材料各方向表現出不同的拉伸沖擊性能,應在不同方向上分別取樣。

試樣形狀和尺寸:試樣厚度優先選用1mm。由產品裁取的試樣,保留原厚度;厚度大于4mm的試樣應機械加工為4mm。對于很薄的薄膜,可以使用多層試樣,但應重疊良好。

試樣數量:至少5個試樣或按產品標準的規定。


選擇合適的擺錘使沖擊能量讀數在試驗機有效范圍內,參照下表:

(在能夾緊試樣的前提下盡量選擇質量小的丁字頭)

擺錘沖擊能量J

丁字頭質量g

15.0

25.0

30±1或60±1

60±1或120±1

試驗結果的計算和表示:

1、拉伸沖擊強度的計算:

式1

           W

E=                ×1000

      d ×h

式中:E—拉伸沖擊強度,KJ/m2

W—校正的試樣破壞所消耗的能量,J

d—試樣厚度,單位為毫米(mm)

h—試樣寬度,單位為毫米(mm)

試驗結果以每組試樣拉伸沖擊強度的算術平均值表示,取3位有效數字。

2、能量校正

由于擺錘沖擊試樣所消耗的能量Ws中包括丁字頭飛出所消耗的能量,必須對能量進行校正,以求出試樣破壞所消耗的能量。

校正的試樣破壞所消耗的能量W按式2計算:

式2

        W′ W″

W=              

       2

式中:W—校正的試樣破壞所消耗的能量,J

W′—彈性碰撞時試樣破壞所消耗的能量,J

W″—非彈性碰撞時試樣破壞所消耗的能量,J

XJL LCD screen tensile shock tester

A product introduction

It is mainly used to measure the energy required for the fracture of plastic samples at the prescribed tensile impact velocity.

Used to measure the brittleness and toughness of nonmetallic materials such as plastics.

Second, the characteristics of

Using the round grating measuring Angle technology, it has the characteristics of high precision, good stability and wide range of measurement

It has the function of calculating the punching power, the impact strength and the average of a batch of samples

It is convenient to check the Angle of elevation and lift Angle

Display mode: LCD touch screen

Iii. Purpose:

It is mainly used to measure the energy required for the fracture of plastic samples at the prescribed tensile impact velocity.

Used to measure the brittleness and toughness of nonmetallic materials such as plastics.

Iv. Compliance with standards:

Test methods of plastic stretch impact performance

ASTM d1822-2006 "test method for the tensile impact energy required to fracture the plastic and electrical insulating materials"

ISO 8256-2004 plastics - stretch - impact strength measurement

V. technical parameters:

1) impact speed: 3.8m/s

2) impact energy: 15J and 25J

3) pendulum torque: pd15J=8.03848Nm pd25J=13.39746Nm

4) pendulum early Yang Angle: 150 °

5) striking center distance: 395mm

6) use temperature (10 ℃ ~ 35)

7) sample size: length 80 + + 2mm width 15 plus or minus 0.5mm thickness <4mm

Free length between clamps: 30 + 2mm

2) power supply: 220VAC-15% ~ 220VAC 10% 50HZ (single-phase three-wire system)

Term: tensile impact strength: the ratio of the impact energy consumed by the tensile impact of the specimen can be compared with the ratio of the smallest cross section before the sample test

Elongation of permanent fracture: the rate of change of the measured distance of the fracture part of the fracture in 1min after sample fracture (%).

Working principle: sample end fixed on the fixture of pendulum impact testing machine, the other end fixed on t, provided by energy, a one-way swinging pendulum impact t-head, make sample damage under high tensile deformation rate, cross head thrown together with the part of the specimen, determine the consumption of pendulum energy and range of samples before and after damage, after correction, calculate the tensile yield strength and the elongation at break of permanent sample.

Test results of different types or sizes can not be compared.

Test equipment:

1. The pendulum of the test machine must be a rigid pendulum and a sample of 2mm thick. The center of the physical collision of the pendulum must be overlapped with the center of the sample thickness.

2. The clamping device of the test machine shall not cause the specimen to be clamped and sliding in the test, the clamping jaw may have the teeth of the file, the size of the teeth may vary according to the sample.

3. The tee head shall be made of light and very low elastic materials and shall not be subjected to plastic deformation during the impact.

Sample: the sample is made from injection molding or machining.

Thin film or sheet sample can be cut by punching knife.

During the process of making samples, no sample overheating should occur.

If the coolant is used in machining, the sample performance should not be affected.

The sample should have no damage on the surface, no defect in the interior and uniform thickness.

The specimen marks shall not affect the sample performance.

Hard materials should not be distorted.

If different tensile shock properties are shown in each direction of the measured material, the samples should be sampled in different directions.

Sample shape and size: the thickness of specimen shall be 1mm first.

The sample made by the product shall retain the original thickness;

The specimen with thickness of more than 4mm shall be machined to 4mm.

For thin films, you can use multi-layer samples, but they should be well overlapped.

Sample quantity: at least 5 samples or according to product standard.


Select the appropriate pendulum to make the impact energy reading within the range of the test machine, and refer to the following table:

(try to choose a small "t-head" with a small quality when you can clamp the sample)

Pendulum impact energy J

g

15.0

25.0

30 + 1 or 60 plus or minus 1

60 + / - 1 or 120 + 1

Calculation and representation of test results:

1. Calculation of tensile impact strength:

Type 1

W.

E = x 1000

D * h

In the formula: E - tensile impact strength, KJ/m2

W-corrected sample destruction of energy consumed, J

D - sample thickness, mm (mm)

H - sample width, mm (mm)

The experimental results show that the three valid digits are given by the arithmetic mean of tensile impact strength of each set of sample.

2. Energy correction

The energy used in the energy Ws consumed by the pendulum impact sample, including the energy consumed by the t-tip, must be calibrated to produce the energy consumed by the sample destruction.

Corrected sample destruction of energy W by type 2 calculation:

Type 2

W 'W"

W =

2

In the formula: W - corrected sample destruction of the energy consumed, J

W '- the energy consumed by sample destruction during elastic collision, J

W - the energy consumed by sample destruction during inelastic collisions, J




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