Device and method for determining the length and notch positioning of impact specimens of welded joints

Abstract

The present invention provides a device for determining the length of a weld joint impact specimen, comprising a length determination fixture, a cutting fixture and a ruler, wherein the cutting fixture is placed in the length determination fixture, the clamping plates of the length determination fixture and the cutting fixture are both axisymmetric structures and the axes of symmetry coincide, the width of the cutting fixture is smaller than the length determination fixture, a length determination clamping knob is provided at one end of the length determination fixture, and a cutting clamping knob is provided at one end of the cutting fixture. The device can accurately and batch-locate the notches of different impact positions of weld joint impact specimens, quickly and simultaneously determine the length processing lines of multiple specimens according to the determined notch positions, thereby realizing rapid batch determination of impact specimens, and can also verify the correctness of the notch position after the notch processing is completed.

Description

Technical Field

[0001] The invention relates to a device for determining the length and notch positioning of a welding joint impact specimen and a notch positioning and specimen length determination method, belonging to the field of material testing specimen processing. Background Art

[0002] In the mechanical property testing of metal welded joints, a large number of impact tests are often required. The impact position of welded joints is significantly more complex and diverse than that of non-welded joint materials, resulting in significantly different impact specimen processing procedures for the two. The impact specimens of non-welded joint materials are first processed to complete the specimen length, and then the center is found for processing the notch. The processing process is relatively simple and easy to achieve rapid batch processing. For welded joints, it is necessary to first determine the position of the impact notch of each group of specimens relative to the weld, and then determine the specimen length based on the notch position. Because the notch position cannot be changed at will, it is generally necessary to determine the specimen length based on the actual position of each specimen notch. This results in a cumbersome and inefficient processing process for welded joint impact specimens, which is more obvious when the amount of impact tests on welded joints is large. It is also difficult to verify the correctness of the notch position after the specimen processing is completed. Summary of the invention

[0003] In order to accurately locate the notch and quickly and simultaneously determine the length of multiple specimens, thereby realizing batch processing, the present invention provides a device and method for determining the length and locating the notch of welding joint impact specimens.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is:

[0005] A device for determining the length and positioning the notch of an impact specimen of a weld joint, characterized in that it comprises a fixed-length clamp 1, a cutting clamp 4 and a ruler 8, wherein the cutting clamp 4 is placed in the fixed-length clamp 1, and the fixed-length clamp 1 comprises fixed-length clamping plates at both ends, and the cutting clamp 4 comprises cutting clamping plates at both ends, the fixed-length clamping plates and the cutting clamping plates are both axially symmetrical structures and the axes of symmetry coincide, the intersection of the axis of symmetry and the inner side of the fixed-length clamping plate is the fixed-length centering point 2, and the intersection of the axis of symmetry and the inner side of the cutting clamping plate is the cutting centering point 5, the width of the cutting clamp 4 is smaller than the width of the fixed-length clamp 1, a fixed-length clamping knob 3 is provided at one end of the fixed-length clamp, and a cutting clamping knob 6 is provided at one end of the cutting clamp 4.

[0006] Furthermore, the width of the fixed-length clamp 1 is 55 mm.

[0007] Furthermore, the width of the cutting fixture 4 is 30-40 mm.

[0008] The present invention also provides a method for using the above device, comprising the following steps:

[0009] Step 1: Etch the two opposite sides of each sample to reveal the weld contour and mark the notch locations respectively;

[0010] Step 2: Arrange several sample blanks with marked position points and place them into the cutting fixture 4, then place the cutting fixture 4 into the fixed-length fixture 1, and then use the ruler 8 to assist in arranging along the fixed-length centering point 2 and the cutting centering point 5, so that the position points marked on each sample blank, the fixed-length centering point 2 and the cutting centering point 5 are located on the same straight line, and then tighten the cutting clamping knob 6 and the fixed-length clamping knob 3 respectively, and then draw the straight line on each sample blank to form a straight line mark 11 on the sample blank, and repeat the operation so that the two opposite sides are marked with the straight line mark 11;

[0011] Step 3: Draw a vertical line 12 of the linear mark 11 on any one of the other two surfaces of each sample blank, so that the two linear marks 11 and the vertical line 12 are located in the same plane;

[0012] Step 4: Place the ruler 8 against one side of the length fixture 1, draw a fixed length line 9 of the impact specimen on one side of the sample along the ruler 8, and then repeat the operation by placing the ruler 8 against the other side of the length fixture 1 to draw a fixed length line 9 of the impact specimen on the other side;

[0013] Step 5: Loosen the fixed-length clamping knob, take out the cutting fixture 4 together with the sample from the fixed-length fixture 1, and cut along the outer sides of the fixed-length lines of the impact specimen drawn on both sides of the sample to ensure that the specimen length is within the tolerance range;

[0014] Step 6: Mill off the positive tolerance allowance in step 5;

[0015] Step 7: Lead the center line of the broach on the impact notch broaching machine to the clamping block of the broaching machine to form the broach blade center line 10, align the vertical line 12 with the broach blade center line 10, and process the impact notch;

[0016] Step 8: Use the straight line marks 11 drawn on each sample in step 2 to check the correctness of the notch processing position.

[0017] The positive tolerance length is 2~4mm.

[0018] The beneficial effects of the present invention are that it can accurately and batch-locate the notches of different impact positions of weld joint impact specimens, quickly and simultaneously determine the length processing lines of multiple specimens according to the determined notch positions, thereby realizing rapid batch length determination of impact specimens, and after the notch processing is completed, the correctness of its position can also be verified. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the device of the present invention in use state;

[0020] Figure 2 is a schematic diagram of the structure of the device of the present invention, wherein the ruler is not shown in the figure;

[0021] Figure 3 It is a schematic diagram of using a cutting fixture to assist in determining the length of a specimen;

[0022] Figure 4 This is a schematic diagram of the accurate location of the impact notch;

[0023] Figure 5 This is a schematic diagram for verifying the impact notch position.

[0024] Among them: 1 is the fixed-length fixture, 2 is the fixed-length centering point, 3 is the fixed-length clamping knob, 4 is the cutting fixture, 5 is the cutting centering point, 6 is the cutting clamping knob, 7 is the sample, 8 is the ruler, 9 is the fixed-length line of the impact specimen, 10 is the centering line of the broach blade, 11 is the straight line mark, 12 is the vertical line, and 13 is the weld contour line. DETAILED DESCRIPTION

[0025] The above technical features and advantages of the present invention are described in more detail below in conjunction with embodiments.

[0026] like Figure 1-Figure 4 , a device for fixing the length of impact specimens of welding joints, characterized in that it includes a fixing length clamp 1, a cutting clamp 4 and a ruler 8, the cutting clamp 4 is placed in the fixing length clamp 1, the fixing length clamp 1 includes fixing length clamping plates at both ends, the cutting clamp 4 includes cutting clamping plates at both ends, the fixing length clamping plates and the cutting clamping plates are both axially symmetrical structures and the symmetry axes coincide, the intersection of the symmetry axis and the inner side of the fixing length clamping plate is the fixing length centering point 2, the intersection of the symmetry axis and the inner side of the cutting clamping plate is the cutting centering point 5, the width of the cutting clamp 4 is smaller than the width of the fixing length clamp 1, a fixing length clamping knob 3 is provided at one end of the fixing length clamp, and a cutting clamping knob 6 is provided at one end of the cutting clamp 4.

[0027] The width of the fixed-length clamp 1 is 55 mm.

[0028] The width of the cutting fixture 4 is 30-40 mm.

[0029] The implementation method of using the above device to determine the length of the sample and locate the notch includes the following steps:

[0030] Step 1: Etch the two opposite sides of each sample to reveal the weld contour and mark the notch locations respectively;

[0031] Step 2: Arrange several sample blanks with marked position points and place them into the cutting fixture 4, then place the cutting fixture 4 into the fixed-length fixture 1, and then use the ruler 8 to assist in arranging along the fixed-length centering point 2 and the cutting centering point 5, so that the position points marked on each sample blank, the fixed-length centering point 2 and the cutting centering point 5 are located on the same straight line, and then tighten the cutting clamping knob 6 and the fixed-length clamping knob 3 respectively, and then draw the straight line on each sample blank to form a straight line mark 11 on the sample blank, and repeat the operation so that the two opposite sides are marked with the straight line mark 11;

[0032] Step 3: Draw a vertical line 12 of the linear mark 11 on any one of the other two surfaces of each sample blank, so that the two linear marks 11 and the vertical line 12 are located in the same plane;

[0033] Step 4: Place the ruler 8 against one side of the length fixture 1, draw a fixed length line 9 of the impact specimen on one side of the sample along the ruler 8, and then repeat the operation by placing the ruler 8 against the other side of the length fixture 1 to draw a fixed length line 9 of the impact specimen on the other side;

[0034] Step 5: Loosen the fixed-length clamping knob, take out the cutting fixture 4 together with the sample from the fixed-length fixture 1, and cut along the outer sides of the fixed-length lines of the impact specimen drawn on both sides of the sample to ensure that the specimen length is within the tolerance range;

[0035] Step 6: Mill off the positive tolerance allowance in step 5;

[0036] Step 7: Lead the center line of the broach on the impact notch broaching machine to the clamping block of the broaching machine to form the broach blade center line 10, align the vertical line 12 with the broach blade center line 10, and process the impact notch;

[0037] Step 8: Use the straight line marks 11 drawn on each sample in step 2 to check the correctness of the notch processing position.

[0038] The positive tolerance length is 2~4mm.

[0039] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by those skilled in the art should be included in the protection scope determined by the claims of the present invention.

Claims

1. A method for determining the length and notch of a welded joint impact specimen, characterized in that: A device for determining the length and notch of a weld joint impact specimen is used, the device comprising a length-determining fixture (1), a cutting fixture (4) and a ruler (8), the cutting fixture (4) being placed in the length-determining fixture (1), the length-determining fixture (1) comprising length-determining clamping plates at two ends, the cutting fixture (4) comprising cutting clamping plates at two ends, the length-determining clamping plates and the cutting clamping plates both being axisymmetric structures with their axes of symmetry coinciding, the intersection of the axis of symmetry and the inner side of the length-determining clamping plates being the length-determining centering point (2), the intersection of the axis of symmetry and the inner side of the cutting clamping plates being the cutting centering point (5), the width of the cutting fixture (4) being smaller than the width of the length-determining fixture (1), one end of the length-determining fixture being provided with a length-determining clamping knob (3), and one end of the cutting fixture (4) being provided with a cutting clamping knob (6); The method comprises the following steps: Step 1: Etch the two opposite sides of each sample to reveal the weld contour and mark the notch locations respectively; Step 2: Arrange several sample blanks with marked position points and place them in the cutting fixture (4), then place the cutting fixture (4) in the fixed-length fixture (1), and then use the ruler (8) to assist in arranging along the fixed-length center point (2) and the cutting center point (5) so that the marked position points on each sample blank, the fixed-length center point (2) and the cutting center point (5) are located on the same straight line, and then tighten the cutting clamping knob (6) and the fixed-length clamping knob (3) respectively, and then draw the straight line on each sample blank to form a straight line mark (11) on the sample blank, and repeat the operation so that the two opposite surfaces are marked with the straight line mark (11); Step 3: Draw a vertical line (12) of the linear mark (11) on any one of the remaining two surfaces of each sample blank, so that the two linear marks (11) and the vertical line (12) are located in the same plane; Step 4: Place a ruler (8) against one side of the length-fixing fixture (1), draw a length-fixing line (9) for the impact specimen on one side of the sample along the ruler (8), and then repeat the operation by placing the ruler (8) against the other side of the length-fixing fixture (1) to draw a length-fixing line (9) for the impact specimen on the other side; Step 5: Loosen the fixed-length clamping knob, remove the cutting fixture (4) together with the sample from the fixed-length fixture (1), and cut along the outer sides of the fixed-length lines of the impact specimen drawn on both sides of the sample to ensure that the specimen length is within the tolerance range; Step 6: Mill off the positive tolerance allowance in step 5; Step 7: Lead the center line of the broach on the impact notch broaching machine to the clamping block of the broaching machine to form the broach blade center line (10), align the vertical line (12) with the broach blade center line (10), and process the impact notch; Step 8: Use the straight line marks (11) drawn on each specimen in Step 2 to check the correctness of the notch machining position.

2. The method for determining the length and notch of a weld joint impact specimen according to claim 1, characterized in that: The width of the fixed-length clamp (1) is 55 mm.

3. The method for determining the length and notch of a weld joint impact specimen according to claim 1, characterized in that: The width of the cutting fixture (4) is 30-40 mm.

4. The method according to claim 1, characterized in that: The positive tolerance length is 2~4mm.

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