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      Product current:home > Product > XJCJ-500M pipe drop hammer impact testing machine
      XJCJ-500M pipe drop hammer impact testing machine

      XJCJ-500M pipe drop hammer impact testing machine

       Overview of the instrument

      It is suitable for the determination of impact toughness of PVC-U, PVC-C pipe, PP pipe, PE pipe, plastic pipe for underground communication pipe, etc. It is an ideal testing instrument for testing, production units, building materials industry and scientific research units.

       instrument characteristics

      The testing machine has the function of preventing secondary impact, the use of AC servo system, lifting hammer speed, good positioning accuracy, high test efficiency, small air resistance, can automatically measure the height, drop hammer lifting height can be arbitrarily set, lifting hammer height automatic calibration, impact hammer weight can be assembled by weights, the capture rate of anti-secondary impact device is 100%. V-shaped iron adjustment to adapt to different pipe diameter of the sample, the hammer fall for free fall movement, according to the requirements of the order to provide to meet the other standards of the impact hammer, the hammer device, anti-secondary impact device using pneumatic transmission to achieve. Two test methods, pass method and gradient method, are applicable. High light (LED) digital tube display instant height; The lifting height of the drop hammer can be set arbitrarily, and the impact height can be set arbitrarily within the range of 50mm ~ 2000mm

      (The capture rate of the anti-secondary impact device in this height range is 100%);

      Automatic calibration of lifting height;

      The impact weight can be assembled by weights;

      The capture rate of the anti-secondary impact device is: 100%;

      V-shaped iron adjustment to adapt to different diameters of pipes and different thickness of the plate samples, optional helmet accessories can be used for impact test helmet;

      The fall of the hammer body is a free fall movement (friction-free introduction);

      Impact hammers that meet other criteria are available on order;

      The anti-secondary impact device adopts pneumatic capture;

      The sample room is connected with the laboratory, and the temperature is the same as the test environment temperature;

      in line with standards

      XJCJ-500M pipe drop hammer impact testing machine

      JB/T9389

      Technical conditions for drop hammer impact testing machine for non-metallic materials

      GB/T 14152

      External impact resistance of thermoplastic pipes

      GB/T10002.1

      Hard polyvinyl chloride (PVC-U) pipe for water supply

      GB/T13664

      Hard polyvinyl chloride (PVC-U) pipe for low pressure water delivery irrigation

      GB/T 16800

      Core layer foamed hard polyvinyl chloride (PVC-U) pipe for drainage

      ISO4422, ISO3127, BSEN1411, BSEN744, etc.

       Working principle

      With the specified quality and size of the drop hammer from the specified height of the impact of the test sample specified parts, you can measure the batch (or continuous extrusion production) of the real impact rate of the product. This test method can be changed by changing the quality of the drop hammer or changing the height to meet the technical requirements of different products. The maximum allowable TIR value is 10%.

      True impact rate:

      When the whole batch of products are tested, the total number of impact damage divided by the total number of impacts is the real impact rate, expressed as a percentage.

      Damage:

      When observed with the naked eye, cracks, cracks or specimen breakage of the sample caused by impact are called damage, and the indentation or discoloration of the sample caused by the impact of the drop hammer is not considered damage. Host frame and guide rail:

      Vertically fixed, can be adjusted and vertical, free release drop hammer, calibration, drop hammer impact pipe rate can not be less than 95% of the theoretical rate.

      Hammer body:

      The hammer body should comply with the provisions of FIG. 1 and Table 2, the hammer head should be made of steel, the minimum wall thickness is 5mm, the surface of the hammer head should not have dents, scratches and other visible defects that affect the test results, the drop hammer with a mass of 0.5kg and 0.8kg should have a d25 hammer, and the drop hammer with a mass greater than or equal to 1kg should have a d90 hammer.

      The specimen support:

      Including a 120° Angle V-shaped bracket, its length should not be less than 200mm, and its fixed position should be such that the vertical projection of the impact point of the drop hammer should be within 2.5mm of the center line of the V-shaped bracket. When arbitrating the test, the lead screw top or support is used.

      Release device:

      The drop hammer can be dropped from any height of at least 2 meters, which refers to the height from the specimen surface, accurate to ±10mm. There should be a device to prevent the second impact of the drop hammer, and the catch rate of the drop hammer rebound should be guaranteed 100%.

      Table 1 Size of the hammer head of the drop hammer unit: mm

      Model number

      Rs

      d±1

      ds

      a,(°)

      d25

      d90

      50

      50

      25

      90

      Arbitrary

      Any

       

      Any

      Any

       

      Table 2 Recommended drop weight unit: kg

      0.5

      0.8

      1.0

      1.25

      1.6

      2.0

      2.5

      3.2

      4.0

      5.0

      6.3

      8.0

      10.0

      12.5

      16.0

      Note: The allowable tolerance for drop hammer mass is ±0.5%

      Sample preparation:

      The sample should be randomly cut from a batch or continuous production of pipes. The cutting end face should be perpendicular to the axis of the pipes. The cutting end should be clean and free of damage.

      Sample length: The length of the sample is (200±10) mm

      Sample marking:

      Samples with an outside diameter greater than 40mm should be marked with equidistant lines along their length direction and numbered sequentially. The number of pipe samples with different outside diameters should be shown in Table 3. For pipes with an outside diameter less than or equal to 40mm, only one impact should be carried out on each sample. Table 3

      Nominal outside diameter mm

      Number of lines should be drawn

      Nominal outer diameter mm

      Number of lines should be drawn

      40 or less

      -

      160

      8

      50

      3

      180

      8

      63

      3

      200

      12

      75

      4

      225

      12

      90

      4

      250

      12

      110

      6

      280

      16

      125

      6

      P 315

      16

      140

      8

      -

      -

      Condition conditioning:

      The sample should be adjusted in a water bath or air bath at (0±1) ℃ or (20±2) ℃. The shortest adjustment time is shown in Table 4. The water bath should be used for arbitration test.

      Table 4 State adjustment schedule of pipes with different wall thickness

      Wall thickness δmm

      Adjust time, min

      Water bath

      Air bath

      The delta 8.6 or less

      8.6 < delta 14.1 or less

      The delta > 14.1

      15

      30

      60

      60

      120

      240

          After state adjustment, the specimen with a wall thickness less than or equal to 8.6mm should be taken out of the air bath for 10s or from the water bath for 20s to complete the test. The specimen with wall thickness greater than 8.6mm should be taken out of the air bath within 20s or from the water bath within 30s to complete the test. If this interval is exceeded, the sample should be immediately returned to the pretreatment device for at least 5min of reprocessing. If the state adjustment temperature of the sample is (20±2) ℃ and the ambient temperature of the test is (20±5) ℃, the time from taking out the sample to the completion of the test can be extended to 60s.

      Test steps:

      1, according to the provisions of product standards to determine the quality of the drop hammer and impact height.

      2, the outer diameter of the sample is less than or equal to 40mm, each sample only withstand one impact.

      3, the outer diameter of the sample is greater than 40mm in the impact test, first make the drop hammer impact on the No. 1 mark, if the sample is not damaged, then impact on the No. 2 mark, until the sample is damaged or all the marks are impacted once. Impact the sample one by one until the judgment result is obtained.

       

       

       

       

       

       

       

       

       

       Technical parameters

      XJCJ-500M pipe drop hammer impact testing machine

      Weight of hammer

      0.250kg16.00kg in increments of 0.100kg and 0.250kg~

      Drop weight mass error

      < 0.5% (where the accuracy of 2.000kg hammer and 1.000kg and 2.000kg weights is ±0.1%)

      Diameter of hammer head

      D90, D25; Note: (SR5, SR10, SR30) available according to user requirements.

      Impact height

      50mm~2000mm

      Height indication error

      < ±2mm

      Specimen diameter

      Φ10mm Φ500mm~

      Lift hammer speed

      10m/min

      Hammer release control method

      Pneumatic

      Overall dimensions

      Length 1100mm x width 570mm x height 3410mm

      Space required

      1.5m front and back, 0.5m left and right, and 0.5m upper are recommended (minimum laboratory height of 4m required)

       

      Instrument configuration

      XJCJ-500M pipe drop hammer impact testing machine

      Main engine

      A (machine)

      An electric box

      One

      A quick lift unit

      A set

      Hammer rod

      Set (standard for execution provided by demander)

      Press weights

      A set (standard for execution provided by the demander)

      Weights

      A set (standard for execution provided by the demander)

      Power cord

      One

      Medium V iron

      One piece

      Small V-iron

      A piece of

      Anchor screws

      Four pieces

      Wooden hands

      One piece (standard according to demander)

      Note: This instrument needs customers to support their own air compressor, the maximum air pressure 1.0MPa.

       

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