A Measuring Method for Angle Indication Error of a Laser Tester for Blade Wrapping Angle

Abstract

The present invention discloses a method for measuring the angular indication error of a laser tester for blade included angle, comprising the steps of: (1) manufacturing a blade included angle gauge block; (2) selecting a blade included angle gauge block; (3) obtaining the measured angular value of the gauge block to be measured; and (4) calculating the angular indication error of the laser tester for blade included angle. By manufacturing a blade included angle gauge block with a reasonable structure, the present invention makes the pattern of the laser of the laser tester for blade included angle reflected on the arc-shaped scale disk clear through the blade included angle gauge block, greatly improving the accuracy of measuring the angular indication error of the laser tester for blade included angle. At the same time, a method for measuring the angular indication error of the laser tester for blade included angle with simple and complete method steps is provided, facilitating the subsequent measurement operation of the angular indication error of the same type of equipment to be inspected.

Description

Technical Field

[0001] The present invention belongs to the technical field of calibration of a laser tester for the blade included angle, and particularly relates to a method for measuring the angular indication error of a laser tester for the blade included angle. Background Art

[0002] The blade included angle is the angle formed by the intersection of the two blade surfaces of the blade edge, which is an important influencing factor for the sharpness and durability of the tool and is also a necessary item for the ex-factory inspection of the tool. There is a current laser tester for the blade included angle mainly used to measure the blade included angle of daily-use tools (such as kitchen knives). Its measurement principle is as follows: a laser beam (Ф≤1mm) hits the blade edge of the tool perpendicular to the beam, and the two reflected lights from the two blade surfaces are respectively reflected onto the angular scale of the disc, and the scale reading directly read is the angle of the measured sample.

[0003] In the past ten-odd years, the laser tester for the blade included angle has been used in daily-use knife and scissors production enterprises. This instrument is convenient to use, does not damage the sample, and has a fast test speed. However, there has always been no standardized calibration method for the main metrological characteristic angle of this instrument for the using units and enterprises. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method for measuring the angular indication error of a laser tester for the blade included angle in view of the above-mentioned deficiencies in the prior art. By manufacturing a blade included angle gauge block with a reasonable structure, the pattern of the laser of the laser tester for the blade included angle reflected on the arc-shaped scale disk through the blade included angle gauge block is clear, greatly improving the accuracy of measuring the angular indication error of the laser tester for the blade included angle. At the same time, a method for measuring the angular indication error of the laser tester for the blade included angle with simple and complete method steps is provided, which is convenient for the subsequent measurement operation of the angular indication error of the same type of equipment to be inspected.

[0005] To solve the above technical problem, the technical solution adopted by the present invention is: a method for measuring the angular indication error of a laser tester for the blade included angle, characterized in that the method includes the following steps:

[0006] Step 1: Fabrication of the blade included angle gauge block:

[0007] The blade included angle gauge block is divided into a polished gauge block and a ground gauge block;

[0008] On a straight edge of the steel plate, a blade edge is formed through mirror polishing to complete the fabrication of the polished gauge block;

[0009] On a straight edge of the steel plate, a blade edge is formed through grinding to complete the fabrication of the ground gauge block; the strip-shaped grinding marks on the blade surface of the ground gauge block are all perpendicular to the blade edge line;

[0010] The angular nominal value of the blade included angle of the blade included angle gauge ranges from 15° to 70°;

[0011] Step 2. Selection of the blade included angle gauge:

[0012] Select n blade included angle gauges with different angular nominal values of the blade included angle as the measured gauges. The angular nominal value of each measured gauge is within the range of the blade included angle laser tester to be inspected. Here, n is a positive integer not less than 3;

[0013] Step 3. Obtaining the measured angular values of the measured gauges:

[0014] Place the measured gauge on the detection fixing base of the blade included angle laser tester, and arrange the cutting edge line of the measured gauge parallel to the scale line on the arc scale of the blade included angle laser tester, and sequentially obtain the measured angular values corresponding to the n measured gauges;

[0015] Among them, when the measured gauge is a polished gauge, the laser of the blade included angle laser tester is reflected by its blade surface and hits the arc scale in the shape of a light spot. At this time, the value of the scale line where the light spot is located is the current measured angular value;

[0016] When the measured gauge is a ground gauge, the laser is reflected by its blade surface and hits the arc scale in the shape of an arc arching away from the zero scale line. At this time, the value of the scale line tangent to the outside of the arc line is the current measured angular value;

[0017] Step 4. Calculate the angular indication error of the blade included angle laser tester.

[0018] In the above method for measuring the angular indication error of a blade included angle laser tester, it is characterized in that: in Step 2, the specific selection method of the n measured gauges is: according to the measurement range A - B of the blade included angle laser tester to be inspected, select three blade included angle gauges with angular nominal values of the blade included angle closest to A, 50% (B - A), and B respectively as the measured gauges. Here, A is the lower limit of the measurement range of the blade included angle laser tester to be inspected, and B is the upper limit of the measurement range of the blade included angle laser tester to be inspected.

[0019] In the above method for measuring the angular indication error of a blade included angle laser tester, it is characterized in that the specific steps of Step 3 are:

[0020] Step 301. Turn on the laser light source of the blade included angle laser tester, and adjust the laser spot so that it hits the zero scale line of the arc scale;

[0021] Step 302: Place the to-be-measured gauge block on the detection fixing base, align the edge line of the to-be-measured gauge block with the installation reference line of the detection fixing base. At this time, the edge line of the to-be-measured gauge block is arranged in parallel with the zero scale line;

[0022] Step 303: Adjust the position of the detection fixing base to make the laser spot hit one cutting edge surface of the to-be-measured gauge block, and then reflect it to the arc scale disk, read the indication value of the arc scale disk as the angle measurement value α1 of one cutting edge surface of the to-be-measured gauge block; adjust the position of the detection fixing base to make the laser spot hit the other cutting edge surface of the to-be-measured gauge block, and then reflect it to the arc scale disk, read the indication value of the arc scale disk as the angle measurement value α2 of the other cutting edge surface of the to-be-measured gauge block. The angle measurement value α3 of the cutting edge included angle of the to-be-measured gauge block = α1 + α2;

[0023] For any one of the to-be-measured gauge blocks, step 303 is executed at least three times to obtain multiple angle measurement values α3 of the to-be-measured gauge block.

[0024] For the above method for measuring the angle indication error of a laser tester for cutting edge included angle, the specific steps of step four are as follows: Calculate the angle indication error △x of the tested laser tester for cutting edge included angle according to the formula △x = x - X, where, X is the nominal value of the cutting edge included angle of the to-be-measured gauge block.

[0025] For the above method for measuring the angle indication error of a laser tester for cutting edge included angle, it is characterized in that: the surface roughness of the cutting edge surface of the polished gauge block is not greater than 0.02μm, and the surface roughness of the cutting edge surface of the ground gauge block is not greater than 0.63μm.

[0026] For the above method for measuring the angle indication error of a laser tester for cutting edge included angle, it is characterized in that: the cutting edge of the cutting edge included angle gauge block is chamfered, the width of the chamfered surface is 0.25mm - 0.5mm, and the thickness of the cutting edge included angle gauge block is 1mm - 2mm, so that the cross-section of the cutting edge is trapezoidal.

[0027] For the above method for measuring the angle indication error of a laser tester for cutting edge included angle, it is characterized in that: record the nominal value of the angle of one cutting edge surface of the to-be-measured gauge block as β1, and the nominal value of the angle of the other cutting edge surface as β2. The value range of β1 is 0° - 55°, and the value range of β2 is 15° - 70°

[0028] For the above method for measuring the angle indication error of a laser tester for cutting edge included angle, it is characterized in that: the length of the cutting edge of the cutting edge included angle gauge block is not less than 5mm;

[0029] When the blade edge length of the blade edge included angle gauge block is 5 mm to 10 mm, the blade edge included angle gauge block is embedded on the metal mounting plate to form an embedded gauge block, and then the embedded gauge block is placed on the detection fixing seat for subsequent measurement.

[0030] The advantages of the present invention compared with the prior art are as follows: By manufacturing a blade edge included angle gauge block with a reasonable structure, the present invention makes the pattern of the laser reflected by the blade edge included angle gauge block on the arc-shaped dial of the blade edge included angle laser tester clear, greatly improving the accuracy of measuring the angle indication error of the blade edge included angle laser tester. At the same time, a method for measuring the angle indication error of the blade edge included angle laser tester with simple and complete method steps is provided, which is convenient for subsequent measurement operations of the angle indication error of the same type of devices to be inspected.

[0031] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of the measurement process of the present invention.

[0033] Figure 2 is a schematic diagram of the structure of the blade edge included angle gauge block adopted by the present invention.

[0034] Figure 3 is a schematic diagram of the structure of the embedded gauge block adopted by the present invention.

[0035] Figure 4 is a schematic diagram of the shape formed on the arc-shaped dial after the laser of the present invention is reflected by the blade edge surface of the grinding type gauge block.

[0036] Figure 5 is a flow chart of the method of the present invention.

[0037] DESCRIPTION OF THE REFERENCE NUMERALS:

[0038] 1 - Blade edge included angle gauge block; 2 - Blade edge surface; 3 - Metal mounting plate;

[0039] 4 - Detection fixing seat; 5 - Arc-shaped dial; 6 - Laser light source. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] As Figures 1 to 5 shown, a method for measuring the angle indication error of a blade edge included angle laser tester according to the present invention includes the following steps:

[0041] Step 1: Fabrication of the blade edge included angle gauge block:

[0042] The blade edge included angle gauge block 1 is divided into a polishing type gauge block and a grinding type gauge block;

[0043] A knife edge is formed by mirror polishing on a straight edge of a steel plate to complete the production of a polished type gauge block;

[0044] A knife edge is formed by grinding on a straight edge of a steel plate to complete the production of a ground type gauge block; the strip grinding marks on the knife edge surface 2 of the ground type gauge block are all perpendicular to the knife edge line;

[0045] The value range of the nominal value of the knife edge included angle of the knife edge included angle gauge block 1 is 15° to 70°;

[0046] Step Two: Selection of the knife edge included angle gauge block:

[0047] Select n knife edge included angle gauge blocks 1 with different nominal values of the knife edge included angle as the gauge blocks to be measured, and the nominal value of the knife edge included angle of each of the gauge blocks to be measured is within the measuring range of the knife edge included angle laser tester to be inspected, where n is a positive integer not less than 3;

[0048] Step Three: Obtaining the angle measurement values of the gauge blocks to be measured:

[0049] Place the gauge block to be measured on the detection fixing seat 4 of the knife edge included angle laser tester, so that the knife edge line of the gauge block to be measured is arranged in parallel with the scale line on the arc-shaped dial 5 of the knife edge included angle laser tester, and sequentially obtain the angle measurement values corresponding to the n gauge blocks to be measured;

[0050] Among them, when the gauge block to be measured is a polished type gauge block, the laser of the knife edge included angle laser tester is reflected by its knife edge surface 2 and hits the arc-shaped dial 5 in the shape of a light spot. At this time, the value of the scale line where the light spot is located is the current angle measurement value;

[0051] As Figure 4 shown, when the gauge block to be measured is a ground type gauge block, the laser is reflected by its knife edge surface 2 and hits the arc-shaped dial 5 in the shape of an arc line arched away from the zero scale line. At this time, the value of the scale line tangent to the outside of the arc line is the current angle measurement value;

[0052] Step Four: Calculate the angle indication error of the knife edge included angle laser tester.

[0053] It should be noted that although the measuring range of the knife included angle laser tester is large, which is determined by the length of the arc-shaped dial 5, generally, the knife edge included angle of the chopping knife to be inspected generally does not exceed 70°, and the knife edge included angle of the slicing knife generally is not less than 15°. Therefore, the value range of the nominal value of the knife edge included angle of the knife edge included angle gauge block 1 is selected as 15° to 70°.

[0054] It should be noted that the knife edge included angle gauge block 1 can be made of rolling bearing steel GCr15 or alloy tool steel CrWMn, so that the hardness of the knife edge surface 2 is not less than 63 HRC.

[0055] It should be noted that for the specific structure of the blade included angle laser tester, refer to the DBA-1 series blade edge angle tester.

[0056] It should be noted that when the blade edge of the measured gauge block is arranged in parallel with the scale line on the arc-shaped scale disk 5, both the grinding marks on the grinding type gauge block and the laser emitted by the laser light source 6 are horizontal. This is to prevent the arc tails diffracted by laser interference, thereby effectively reducing the reading error.

[0057] The present invention manufactures a blade included angle gauge block 1 with a reasonable structure, making the pattern reflected by the laser of the blade included angle laser tester on the arc-shaped scale disk 5 clear, greatly improving the accuracy of measuring the angle indication error of the blade included angle laser tester. At the same time, a method for measuring the angle indication error of the blade included angle laser tester with simple and complete method steps is provided, facilitating the subsequent measurement operation of the angle indication error of the same type of equipment to be inspected.

[0058] In this embodiment, in step two, the specific selection method of the n measured gauge blocks is as follows: According to the measurement range A to B of the blade included angle laser tester to be inspected, select three blade included angle gauge blocks 1 with the nominal values of the blade included angles closest to A, 50% (B - A), and B respectively as the measured gauge blocks, where A is the lower limit of the measurement range of the blade included angle laser tester to be inspected, and B is the upper limit of the measurement range of the blade included angle laser tester to be inspected.

[0059] In this embodiment, for the convenience of processing, the nominal values of the blade included angle gauge block 1 are within the range of 15° to 70°, and the blade included angle gauge blocks 1 with 15°, 20°, 25°,..., 65° and 70° are selected for processing and production;

[0060] For example, if the measurement range of the blade included angle laser tester to be inspected is 15° to 60°, then B = 60°, 50% (B - A) = 22.5°, A = 15°, then select the blade included angle gauge blocks 1 with nominal values of 60°, 25° and 15° of the blade included angle, and measure them in sequence.

[0061] In this embodiment, the specific steps of step three are as follows:

[0062] Step 301: Turn on the laser light source 6 of the blade included angle laser tester, and adjust the laser spot so that it hits the zero scale line of the arc-shaped scale disk 5;

[0063] Step 302: Place the measured gauge block on the detection fixing seat 4, and align the blade edge line of the measured gauge block with the installation reference line of the detection fixing seat 4. At this time, the blade edge line of the measured gauge block is arranged in parallel with the zero scale line;

[0064] Step 303: Adjust the position of the detection fixing base 4 so that the laser spot is projected onto one cutting edge surface 2 of the to-be-measured gauge block, and then reflected onto the arc scale 5. Read the indication value of the arc scale 5 as the angle measurement value α1 of one cutting edge surface 2 of the to-be-measured gauge block. Adjust the position of the detection fixing base 4 so that the laser spot is projected onto the other cutting edge surface 2 of the to-be-measured gauge block, and then reflected onto the arc scale 5. Read the indication value of the arc scale 5 as the angle measurement value α2 of the other cutting edge surface 2 of the to-be-measured gauge block. The angle measurement value α3 of the cutting edge included angle of the to-be-measured gauge block = α1 + α2;

[0065] For any one of the to-be-measured gauge blocks, step 303 is performed at least three times to obtain multiple angle measurement values α3 of the to-be-measured gauge block.

[0066] In this embodiment, the specific steps of step four are: calculate the angle indication error △x of the laser tester for the inspected cutting edge included angle according to the formula △x = x - X, where is the average value of multiple α3, and X is the nominal value of the cutting edge included angle of the to-be-measured gauge block.

[0067] In this embodiment, the surface roughness of the cutting edge surface 2 of the polished gauge block is not greater than 0.02 μm, and the surface roughness of the cutting edge surface 2 of the ground gauge block is not greater than 0.63 μm.

[0068] In this embodiment, the flatness tolerance of the cutting edge surface 2 is not greater than 0.2 μm.

[0069] In this embodiment, the cutting edge of the cutting edge included angle gauge block 1 is chamfered, the width of the chamfered surface is 0.25 mm - 0.5 mm, and the thickness of the cutting edge included angle gauge block 1 is 1 mm - 2 mm, so that the cross-section of the cutting edge is trapezoidal.

[0070] In this embodiment, the nominal value of the angle of one cutting edge surface 2 of the to-be-measured gauge block is denoted as β1, and the nominal value of the angle of the other cutting edge surface 2 is denoted as β2. The value range of β1 is 0° to 55°, and the value range of β2 is 15° to 70°.

[0071] In this embodiment, when β1 takes 0°, the cross-section of the cutting edge of the cutting edge included angle gauge block 1 is a right trapezoid, which reduces the processing difficulty and only needs to ensure that one cutting edge surface 2 meets the processing requirements. In this structure, the angle measurement value α1 is not obtained in step 303. At this time, without adjusting the position of the detection fixing base 4, only by flipping and installing the cutting edge included angle gauge block 1, the angle measurement values α2 in two directions can be obtained.

[0072] In this embodiment, the length of the cutting edge of the cutting edge included angle gauge block 1 is not less than 5 mm;

[0073] Such as Figure 3As shown, when the blade edge length of the blade included angle gauge block 1 is 5 mm to 10 mm, the blade included angle gauge block 1 is embedded on the metal mounting plate 3 to form an embedded gauge block, and then the embedded gauge block is placed on the detection and fixing seat 4 for subsequent measurement.

[0074] In this embodiment, when the blade edge length of the blade included angle gauge block 1 is greater than 10 mm, the blade included angle gauge block 1 can be directly adsorbed on the detection and fixing seat of the blade included angle laser tester for subsequent measurement.

[0075] It should be noted that the metal mounting plate 3 is used to protect the blade included angle gauge block 1. At the same time, the shorter blade included angle gauge block 1 can also reduce the processing difficulty, thus ensuring the quality of the blade included angle gauge block 1 and saving the processing cost.

[0076] The above are only the preferred embodiments of the present invention, and do not impose any limitations on the present invention. Any simple modifications, changes, and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A method for measuring the angular indication error of a blade wrap angle laser tester, characterized in that, The method includes the following steps: Step 1, manufacturing of the blade included angle gauge block: The blade included angle gauge block (1) is divided into a polishing type gauge block and a grinding type gauge block; On a straight edge of a steel plate, a blade edge is formed through mirror polishing to complete the manufacturing of the polishing type gauge block; On a straight edge of a steel plate, a blade edge is formed through grinding to complete the manufacturing of the grinding type gauge block; the strip-shaped grinding marks on the blade surface (2) of the grinding type gauge block are all perpendicular to the blade edge line; The value range of the nominal value of the included angle of the blade included angle gauge block (1) is 15° to 70°; Step 2, selection of the blade included angle gauge block: Select n blade included angle gauge blocks (1) with different nominal values of the blade included angle as the measured gauge blocks, and the nominal value of the blade included angle of each of the measured gauge blocks is within the measurement range of the blade included angle laser tester to be inspected, where n is a positive integer not less than 3; Step 3, obtaining the measured angle values of the measured gauge blocks: Place the measured gauge block on the detection fixing seat (4) of the blade included angle laser tester, so that the blade edge line of the measured gauge block is arranged in parallel with the scale line on the arc-shaped dial (5) of the blade included angle laser tester, and sequentially obtain the measured angle values corresponding to the n measured gauge blocks; Among them, when the measured gauge block is a polishing type gauge block, the laser of the blade included angle laser tester is reflected by its blade surface (2) and hits the arc-shaped dial (5) in the shape of a light spot, and at this time, the value of the scale line where the light spot is located is the current measured angle value; When the measured gauge block is a grinding type gauge block, the laser is reflected by its blade surface (2) and hits the arc-shaped dial (5) in the shape of an arc line arched away from the zero scale line, and at this time, the value of the scale line tangent to the outer side of the arc line is the current measured angle value; Step 4, calculating the angle indication error of the blade included angle laser tester.

2. A method for measuring the angular indication error of a blade wrap angle laser tester according to claim 1, characterized in that: In Step 2, the specific selection method of the n measured gauge blocks is as follows: according to the measurement range A to B of the blade included angle laser tester to be inspected, select three blade included angle gauge blocks (1) with nominal values of the blade included angle closest to A, 50% (B - A), and B respectively as the measured gauge blocks, where A is the lower limit of the measurement range of the blade included angle laser tester to be inspected, and B is the upper limit of the measurement range of the blade included angle laser tester to be inspected.

3. A method for measuring the angular indication error of a blade wrap angle laser tester according to claim 1, characterized in that, The specific steps of Step 3 are: Step 301, turn on the laser light source (6) of the blade included angle laser tester, and adjust the laser spot so that it hits the zero scale line on the arc-shaped dial (5); Step 302, place the measured gauge block on the detection fixing seat (4), and align the blade edge line of the measured gauge block with the installation reference line of the detection fixing seat (4). At this time, the blade edge line of the measured gauge block is arranged in parallel with the zero scale line; Step 303: Adjust the position of the detection fixture (4) so that the laser spot is projected onto one cutting edge surface (2) of the measured gauge block, and then reflected onto the arc scale (5). Read the indication of the arc scale (5) as the angle measurement value α1 of one cutting edge surface (2) of the measured gauge block. Adjust the position of the detection fixture (4) so that the laser spot is projected onto the other cutting edge surface (2) of the measured gauge block, and then reflected onto the arc scale (5). Read the indication of the arc scale (5) as the angle measurement value α2 of the other cutting edge surface (2) of the measured gauge block. The angle measurement value α3 of the included angle of the cutting edges of the measured gauge block = α1 + α2; For any one of the measured gauge blocks, step 303 is repeated at least three times to obtain multiple angle measurement values α3 of the measured gauge block.

4. A method for measuring the angular indication error of a blade included angle laser tester according to claim 3, characterized in that, The specific steps of Step 4 are as follows: Calculate the angular indication error △x of the laser tester for the included angle of the inspected blade according to the formula △x = x - X, where is the average value of multiple α3, and X is the nominal value of the included angle of the blade of the measured gauge block to be measured.

5. A method for measuring the angular indication error of a blade wrap angle laser tester according to claim 1, characterized in that: The surface roughness of the cutting edge surface (2) of the polished gauge block is not greater than 0.02 μm, and the surface roughness of the cutting edge surface (2) of the ground gauge block is not greater than 0.63 μm.

6. A method for measuring the angular indication error of a blade wrap angle laser tester according to claim 1, characterized in that: The thickness of the included angle gauge block (1) is 1 mm to 2 mm. The cutting edge of the included angle gauge block (1) is chamfered, and the width of the chamfered surface is 0.25 mm to 0.5 mm, so that the cross-section of the cutting edge is trapezoidal.

7. A method for measuring the angular indication error of a blade wrap angle laser tester according to claim 3, characterized in that: Record the nominal angle value of one cutting edge surface (2) of the measured gauge block as β1, and the nominal angle value of the other cutting edge surface (2) as β2. The value range of β1 is 0° to 55°, and the value range of β2 is 15° to 70°.

8. A method for measuring the angular indication error of a blade wrap angle laser tester according to claim 1, characterized in that: The length of the cutting edge of the included angle gauge block (1) is not less than 5 mm; When the length of the cutting edge of the included angle gauge block (1) is 5 mm to 10 mm, embed the included angle gauge block (1) in the metal mounting plate (3) to form an embedded gauge block, and then place the embedded gauge block on the detection fixture (4) for subsequent measurement.

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