A method for adjusting the blade clearance and overlap of a trimming shear

Abstract

This application relates to a method for adjusting the blade clearance and overlap amount of a trimming shear. By improving the operation processes and parameters of the corresponding parts on the tinning line, the blade clearance and overlap amount of the trimming shear can be adjusted to appropriate values. The method for adjusting the blade clearance and overlap amount of the trimming shear provided by this application can solve problems such as the waste edges cut off cannot enter the guide groove normally, the strip waste edges cannot be sheared continuously, and there are burrs after the strip edges are sheared, ensuring that the quality of the strip meets the requirements.

Description

Technical Field

[0001] This application relates to the field of cold rolling of steel, and particularly to a method for adjusting the shear blade clearance and overlap of a trimming shear. Background Art

[0002] The 1420 tinning line has two production lines. The strip width ranges from 700 mm to 1280 mm, and the thickness ranges from 0.12 mm to 0.55 mm. There is a trimming shear at the entrance section of each line. The waste edges of the strip need to be removed by the trimming shear to meet the personalized requirements of different customer orders for the width of the strip product, and at the same time, the quality of the strip edges needs to be ensured.

[0003] The trimming shear is located between the welder and the loop. After welding, the thickness variation and width variation of the strip are very large. In particular, the width variation has a great impact on the operation of the trimming shear. Tinplate is cold-rolled thin strip steel. If the shear blade clearance of the trimming shear is not adjusted properly, it is easy to cause problems such as the removed waste edge not being able to enter the guide groove normally, the waste edge of the strip not being cut off, and burrs on the strip edge after shearing. Summary of the Invention

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, this application provides a method for adjusting the shear blade clearance and overlap of a trimming shear.

[0005] This application provides a method for adjusting the shear blade clearance and overlap of a trimming shear, and the method includes the steps of:

[0006] After the trimming shear is installed on the tinning line, adjust the bottom and top ring so that the distance between the adjusting device and the lower shear blade in the trimming shear reaches a first preset value;

[0007] Determine that the actual thickness of the bottom and top ring reaches a first dimension;

[0008] Install the bottom and top ring and the setting ring on the tinning line;

[0009] Rotate the clearance adjustment knob until the display value of the clearance indicator reaches a second preset value and then stop rotating;

[0010] Rotate the overlap adjustment knob until the display value of the overlap indicator reaches a third preset value and then stop rotating;

[0011] Rotate the rotation knob until the display value of the overlap indicator reaches a fourth preset value and then stop rotating;

[0012] Mark the first position of the rotation knob on the rocker arm and lock it in place with the overlap locking device;

[0013] Determine that the minimum tool clearance of the tool reaches a second dimension;

[0014] Grind the bottom and top ring to a third dimension and then remove the setting ring;

[0015] Rotate the gap adjustment knob until the display value of the gap indicator reaches the fifth preset value, and then stop rotating.

[0016] Ensure that the shear blade gap is within the tolerance range.

[0017] Check and record the other two measurement points on the reference curve to ensure that the shear blade gap is still within the tolerance range and the corresponding tolerances between points are within the sixth preset value.

[0018] Set the working parameters of the cutting unit according to the preset parameters.

[0019] Rotate the gap adjustment knob until the display value of the gap indicator reaches the seventh preset value, and then stop rotating. Lock it in place with the gap locking device and the overlap amount locking device.

[0020] Rotate the overlap amount adjustment knob until the display value of the overlap amount indicator reaches the eighth preset value, and then stop rotating. Lock it in place with the gap locking device and the overlap amount locking device.

[0021] Preferably, the first preset value is 149.085 - 150.015 mm.

[0022] Preferably, the second preset value is 0.14 - 0.16 mm.

[0023] Preferably, the third preset value is 0.

[0024] Preferably, the fourth preset value is 0.38 - 0.98 mm.

[0025] Preferably, the fifth preset value is 0 mm.

[0026] Preferably, the tolerance range is 0 - 0.015 - 0.025 mm.

[0027] Preferably, the sixth preset value is -0.01 to 0.001 mm.

[0028] Preferably, the seventh preset value is 0.015 - 0.025 mm.

[0029] Preferably, the eighth preset value is 0.3 - 0.5 mm.

[0030] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0031] The method provided by the embodiment of the present application can solve problems such as the waste edge cut cannot enter the guide groove normally, the waste edge of the strip steel cannot be cut off, and there are burrs after the strip steel edge is sheared due to improper adjustment of the shear blade gap and overlap amount of the trimming shear, and ensure that the quality of the strip steel meets the requirements. Brief Description of the Drawings

[0032] The drawings herein are incorporated into and form a part of this specification, showing embodiments in accordance with the present invention, and are used together with the specification to explain the principles of the present invention.

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 It is an adjustment schematic diagram of a method for adjusting the shear blade gap and overlap amount of a trimming shear provided by an embodiment of the present application;

[0035] Figure 2 It is a schematic diagram of the initial shear blade gap and overlap amount in a method for adjusting the shear blade gap and overlap amount of a trimming shear provided by an embodiment of the present application. Detailed Embodiments

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present application belong to the scope of protection of the present application.

[0037] Figure 1 It is an adjustment schematic diagram of a method for adjusting the shear blade gap and overlap amount of a trimming shear provided by an embodiment of the present application.

[0038] In the prior art, due to improper adjustment of the shear blade gap and overlap amount of the trimming shear, the cut waste edge cannot enter the guide groove normally, or the waste edge of the strip steel cannot be cut continuously, or there are burrs after the edge of the strip steel is sheared. In view of the above problems, the present application proposes a method for adjusting the shear blade gap and overlap amount of a trimming shear, and the method includes the steps:

[0039] S1: After installing the trimming shear on the tinning line, adjust the bottom and top rings 19, 20, 71 so that the distance between the adjusting device and the lower shear blade in the trimming shear reaches a first preset value;

[0040] S2: Determine that the actual thickness of the bottom and top ring 71 reaches a first dimension;

[0041] S3: Install the bottom and top rings 19, 71 and the setting ring 72 on the tinning line;

[0042] S4: Rotate the gap adjustment knob 12 until the display value of the gap indicator 32 reaches the second preset value, and then stop rotating;

[0043] S5: Rotate the overlap amount adjustment knob 13 until the display value of the overlap amount indicator 34 reaches the third preset value, and then stop rotating;

[0044] S6: Rotate the rotation knob 14 until the display value of the overlap amount indicator 34 reaches the fourth preset value, and then stop rotating;

[0045] S7: Mark the first position of the rotation knob 14 on the rocker arm 27 and lock it in place with the overlap amount locking device 54;

[0046] S8: Determine that the minimum tool gap of the tool reaches the second dimension;

[0047] S9: Grind the bottom top ring 19 to the third dimension and then remove the setting ring 72;

[0048] S10: Rotate the gap adjustment knob 12 until the display value of the gap indicator 32 reaches the fifth preset value, and then stop rotating;

[0049] S11: Ensure that the shear blade gap is within the tolerance range;

[0050] S12: Check and record two other measurement points on the reference curve to ensure that the shear blade gap is still within the tolerance range and the corresponding tolerances between points are within the sixth preset value;

[0051] S13: Set the working parameters of the cutting unit according to the preset parameters;

[0052] S14: Rotate the gap adjustment knob 12 until the display value of the gap indicator 32 reaches the seventh preset value, and then stop rotating, and lock it in place with the gap locking device 75 and the overlap amount locking device 54;

[0053] S15: Rotate the overlap amount adjustment knob 13 until the display value of the overlap amount indicator 34 reaches the eighth preset value, and then stop rotating, and lock it in place with the gap locking device 75 and the overlap amount locking device 54.

[0054] Specifically, as Figure 1As shown in the figure, it is first necessary to introduce the functions of the parts on the tinning unit in this application, as follows: The gap adjustment knob 12 is used to adjust the shear blade gap of the trimming shear on the tinning unit. When the gap adjustment knob 12 is operated, the shear blade gap of the trimming shear on the tinning unit can be adjusted according to the operation direction of the gap adjustment knob 12; the gap display meter 32 is used to display the readings during the adjustment process of the gap adjustment knob 12. During the operation of the gap adjustment knob 12, the readings on the gap display meter 32 also change accordingly, and the operator can intuitively observe the shear blade gap of the trimming shear on the tinning unit from the gap display meter 32; the overlap amount adjustment knob 13 is used to adjust the overlap amount of the trimming shear on the tinning unit. When the overlap amount adjustment knob 13 is operated, the overlap amount of the trimming shear on the tinning unit can be adjusted according to the operation direction of the overlap amount adjustment knob 13; the overlap amount display meter 34 is used to display the readings during the adjustment process of the overlap amount adjustment knob 13. During the operation of the overlap amount adjustment knob 13, the readings on the overlap amount display meter 34 also change accordingly, and the operator can intuitively observe the overlap amount of the trimming shear on the tinning unit from the overlap amount display meter 34; the top rings 19, 20, and 71 are all used to adjust and set the initial overlap amount, and the operator can adjust and set the initial overlap amount by operating the top rings 19, 20, and 71; the setting ring 72 is used to adjust and set the initial shear blade gap, and the operator can adjust and set the initial shear blade gap by operating the setting ring 72; the rocker arm 27 and the rotary knob 14 are used to record the position of the overlap amount adjustment device and make markings. The gap locking device 75 is locked with bolts and is used to lock and fix the trimming shear after the shear blade gap is adjusted to maintain the current shear blade gap; the overlap amount locking device 54 is locked with bolts and is used to lock and fix the trimming shear after the shear blade overlap amount is adjusted to maintain the current overlap amount.

[0055] Specifically, as Figure 2 shown, the initial shear blade gap of the trimming shear on the tinning unit is 0.15 ± 0.01 mm, and the initial overlap amount is 0.68 ± 0.03 mm. After the shear blades need to be replaced, the shear blade gap and overlap amount need to be adjusted according to the thickness of the trimmed strip steel.

[0056] Furthermore, the specific steps of the method for adjusting the shear blade gap and overlap amount of the trimming shear in this application are as follows:

[0057] S1: After the trimming shear is installed on the tinning unit, adjust the bottom top rings 19, 20, and 71 so that the distance between the adjustment device and the lower shear blade in the trimming shear reaches the first preset value;

[0058] Specifically, in this step, first install a trimming shear on the tinning line. The trimming shear specifically includes an upper shear blade and a lower shear blade, which are oppositely arranged. The strip steel passes through the gap between the upper shear blade and the lower shear blade and is subjected to a cutting operation under the combined action of the upper shear blade and the lower shear blade. After the installation of the trimming shear is completed, adjust the bottom and top rings 19, 20, 71 on the tinning line, so that the distance between the adjusting device and the lower shear blade in the trimming shear reaches a first preset value. Specifically, the first preset value is 149.085 - 150.015 mm.

[0059] S2: Determine that the actual thickness of the bottom and top ring 71 reaches a first dimension;

[0060] Specifically, in this step, the actual thickness of the bottom and top ring 71 is denoted as the first dimension E, and the specific value of E can be obtained by measuring with a measuring ruler.

[0061] S3: Install the bottom and top rings 19, 71 and the setting ring 72 on the tinning line;

[0062] Specifically, in this step, the top rings 19, 71 are both used to adjust and set the initial overlap amount, and the operator can adjust and set the initial overlap amount by operating the top rings 19, 71; the setting ring 72 is used to adjust and set the initial shear blade gap, and the operator can adjust and set the initial shear blade gap by operating the setting ring 72. There are slots on the tinning line for installing the bottom and top rings 19, 71 and the setting ring 72, and the operator can install the bottom and top rings 19, 71 and the setting ring 72 in the corresponding slots.

[0063] S4: Rotate the gap adjustment knob 12 until the display value of the gap display meter 32 reaches a second preset value and then stop rotating;

[0064] Specifically, in this step, the gap adjustment knob 12 is used to adjust the shear blade gap of the trimming shear on the tinning line. When the gap adjustment knob 12 is operated, the shear blade gap of the trimming shear on the tinning line can be adjusted according to the operation direction of the gap adjustment knob 12; the gap display meter 32 is used to display the reading during the adjustment process of the gap adjustment knob 12. During the operation of the gap adjustment knob 12, the reading on the gap display meter 32 also changes accordingly, and the operator can directly observe the shear blade gap of the trimming shear on the tinning line from the gap display meter 32. When the operator rotates the gap adjustment knob 12, at the same time, they need to closely monitor the display value of the gap display meter 32, which is the current shear blade gap set by the gap adjustment knob 12. Specifically, the second preset value is 0.14 - 0.16 mm. When the display value of the gap display meter 32 is 0.14 - 0.16 mm, the operator stops rotating the gap adjustment knob 12.

[0065] S5: Rotate the overlap adjustment knob 13 until the display value of the overlap indicator 34 reaches the third preset value, and then stop rotating.

[0066] Specifically, in this step, the overlap adjustment knob 13 is used to adjust the overlap of the trimming shears on the tinning line. When the overlap adjustment knob 13 is operated, the overlap of the trimming shears on the tinning line can be adjusted according to the operation direction of the overlap adjustment knob 13; the overlap indicator 34 is used to display the indication during the adjustment process of the overlap adjustment knob 13. During the operation of the overlap adjustment knob 13, the indication on the overlap indicator 34 also changes accordingly, and the operator can visually observe the overlap of the trimming shears on the tinning line from the overlap indicator 34. When the operator rotates the overlap adjustment knob 13, the operator needs to closely monitor the display value of the overlap indicator 34 at the same time, and this display value is the current overlap set by the overlap adjustment knob 13. Specifically, the third preset value is 0. When the display value of the overlap indicator 34 is 0, the operator stops rotating the overlap adjustment knob 13.

[0067] S6: Rotate the rotation knob 14 until the display value of the overlap indicator 34 reaches the fourth preset value, and then stop rotating.

[0068] Specifically, in this step, the rotation knob 14 is used to adjust the position of the overlap adjustment device, and the overlap indicator 34 is used to display the indication during the adjustment process of the overlap adjustment knob 13. During the operation of the overlap adjustment knob 13, the indication on the overlap indicator 34 also changes accordingly, and the operator can visually observe the overlap of the trimming shears on the tinning line from the overlap indicator 34. When the operator rotates the rotation knob 14, the operator needs to closely monitor the display value of the overlap indicator 34 at the same time, and this display value is the current overlap set by the rotation knob 14. Specifically, the fourth preset value is 0.38 - 0.98 mm. When the display value of the overlap indicator 34 is 0.38 - 0.98 mm, the operator stops rotating the rotation knob 14.

[0069] S7: Mark the first position of the rotation knob 14 on the swing arm 27 and lock it in place with the overlap locking device 54.

[0070] Specifically, in this step, the swing arm 27 is used to mark the position of the overlap adjustment device. After marking the position of the rotation knob 14 on the swing arm 27, use the overlap locking device 54 to lock it in place. The overlap locking device is used to lock and fix the trimming shears after adjusting the overlap of the shear blades to maintain the current overlap.

[0071] S8: Determine that the minimum tool clearance of the tool reaches the second dimension.

[0072] Specifically, in this step, the minimum tool clearance of the tool is denoted as the second dimension S, and the specific value of S can be obtained by measuring with a measuring scale.

[0073] S9: Grind the bottom top ring 19 to the third dimension and then remove the setting ring 72.

[0074] Specifically, in this step, the third dimension is denoted as A, and the expression of the third dimension is: A = E + S - 0.15. After grinding the bottom top ring 19 to the third dimension, the clearance value can be maintained at 0.15 ± 0.01 mm after replacing the bottom top ring 71. Then remove the setting ring 72. The setting ring 72 is used to adjust and set the initial shear blade clearance, and the operator can adjust and set the initial shear blade clearance by operating the setting ring 72.

[0075] S10: Rotate the clearance adjustment knob 12 until the display value of the clearance display meter 32 reaches the fifth preset value and then stop rotating.

[0076] Specifically, in this step, the clearance adjustment knob 12 is used to adjust the shear blade clearance of the trimming shear on the tin plating unit. When operating the clearance adjustment knob 12, the shear blade clearance of the trimming shear on the tin plating unit can be adjusted according to the operation direction of the clearance adjustment knob 12. The clearance display meter 32 is used to display the value during the adjustment process of the clearance adjustment knob 12. During the operation of the clearance adjustment knob 12, the value on the clearance display meter 32 also changes accordingly, and the operator can intuitively observe the shear blade clearance of the trimming shear on the tin plating unit from the clearance display meter 32. When the operator rotates the clearance adjustment knob 12, the display value of the clearance display meter 32 needs to be closely monitored at the same time. This display value is the current shear blade clearance set by the clearance adjustment knob 12. Specifically, the fifth preset value is 0 mm. When the display value of the clearance display meter 32 is 0 mm, the operator stops rotating the clearance adjustment knob 12.

[0077] S11: Ensure that the shear blade clearance is within the tolerance range.

[0078] Specifically, in this step, considering the actual axial operation of the tool, it is necessary to ensure that the shear blade clearance must be within the tolerance range. Specifically, the tolerance range is 0 - 0.015 - 0.025 mm.

[0079] S12: Check and record two other measurement points on the reference curve to ensure that the shear blade clearance is still within the tolerance range and the corresponding tolerances between points are within the sixth preset value.

[0080] Specifically, in this step, in order to ensure the accurate operation of the tool, two other points need to be selected on the reference curve and these two measurement points are checked and recorded to ensure that the shear blade clearance is still within the tolerance range and the corresponding tolerances between points are within the sixth preset value. Specifically, the sixth preset value is -0.01 to 0.001 mm, and the tolerance range is 0 - 0.015 - 0.025 mm.

[0081] S13: Set the working parameters of the cutting unit according to the preset parameters;

[0082] Specifically, in this step, after the above basic settings are completed, the working parameters of all cutting units are set to the preset parameters again. Specifically, the preset parameters are: clearance 0.015 - 0.025 mm, additional overlap 0.3 - 0.5 mm.

[0083] S14: Rotate the clearance adjustment knob 12 until the display value of the clearance display meter 32 reaches the seventh preset value, and then stop rotating, and lock it in place with the clearance locking device 75 and the overlap amount locking device 54;

[0084] Specifically, in this step, the clearance adjustment knob 12 is used to adjust the shear blade clearance of the trimming shear on the tinning line. When operating the clearance adjustment knob 12, the shear blade clearance of the trimming shear on the tinning line can be adjusted according to the operation direction of the clearance adjustment knob 12; the clearance display meter 32 is used to display the indication during the adjustment process of the clearance adjustment knob 12. During the operation of the clearance adjustment knob 12, the indication on the clearance display meter 32 also changes accordingly, and the operator can intuitively observe the shear blade clearance of the trimming shear on the tinning line from the clearance display meter 32. When the operator rotates the clearance adjustment knob 12, the display value of the clearance display meter 32 needs to be closely monitored at the same time, and this display value is the current shear blade clearance set by the clearance adjustment knob 12. Specifically, the seventh preset value is 0.02 mm. When the display value of the clearance display meter 32 is 0.02 mm, the operator stops rotating the clearance adjustment knob 12, and uses the clearance locking device 75 and the overlap amount locking device 54 to lock it in place to maintain the current shear blade clearance setting of the trimming shear.

[0085] S15: Rotate the overlap amount adjustment knob 13 until the display value of the overlap amount display meter 34 reaches the eighth preset value, and then stop rotating, and lock it in place with the clearance locking device 75 and the overlap amount locking device 54.

[0086] Specifically, in this step, the overlap adjustment knob 13 is used to adjust the overlap amount of the trimming shears on the tinning line. When the overlap adjustment knob 13 is operated, the overlap amount of the trimming shears on the tinning line can be adjusted according to the operation direction of the overlap adjustment knob 13; the overlap amount display 34 is used to display the indication during the adjustment process of the overlap adjustment knob 13. During the operation of the overlap adjustment knob 13, the indication on the overlap amount display 34 also changes accordingly, and the operator can intuitively observe the overlap amount of the trimming shears on the tinning line from the overlap amount display 34. When the operator rotates the overlap adjustment knob 13, it is necessary to closely monitor the displayed value on the overlap amount display 34 at the same time, and this displayed value is the current overlap amount set by the overlap adjustment knob 13. Specifically, the eighth preset value is 0.4 mm. When the displayed value on the overlap amount display 34 is 0.4 mm, the operator stops rotating the overlap adjustment knob 13 and uses the gap locking device 75 and the overlap amount locking device 54 to lock it in place to maintain the current overlap amount setting of the trimming shears.

[0087] A method for adjusting the shearing edge clearance and overlap amount of the trimming shears provided in this application can solve problems such as the waste edges cut off cannot enter the guide groove normally, the strip waste trimming shears do not stop continuously, and there are burrs after the strip edges are sheared, ensuring that the quality of the strip meets the requirements.

[0088] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0089] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for adjusting the shearing blade clearance and overlap amount of a trimming shear, characterized in that, the method comprises the steps of: After installing the trimming shear on the tinning line, adjust the first bottom and top ring (19), the second bottom and top ring (20) and the third bottom and top ring (71) so that the distance between the adjusting device and the lower shearing blade in the trimming shear reaches a first preset value; Determine that the actual thickness of the third bottom and top ring (71) reaches a first dimension; Install the first bottom and top ring (19), the third bottom and top ring (71) and the setting ring (72) on the tinning line; Rotate the clearance adjustment knob (12) until the display value of the clearance indicator (32) reaches a second preset value and then stop rotating; Rotate the overlap amount adjustment knob (13) until the display value of the overlap amount indicator (34) reaches a third preset value and then stop rotating; Rotate the rotation knob (14) until the display value of the overlap amount indicator (34) reaches a fourth preset value and then stop rotating; Mark the first position of the rotation knob (14) on the rocker arm (27) and lock it in place with the overlap amount locking device (54); Determine that the minimum tool clearance of the tool reaches a second dimension; Grind the first bottom and top ring (19) to a third dimension and then remove the setting ring (72); Rotate the clearance adjustment knob (12) until the display value of the clearance indicator (32) reaches a fifth preset value and then stop rotating; Ensure that the shearing blade clearance is within the tolerance range; Check and record two other measurement points on the reference curve to ensure that the shearing blade clearance is still within the tolerance range and the corresponding tolerances between points are within a sixth preset value; Set the working parameters of the cutting unit according to the preset parameters; Rotate the clearance adjustment knob (12) until the display value of the clearance indicator (32) reaches a seventh preset value and then stop rotating, and lock it in place with the clearance locking device (75) and the overlap amount locking device (54); Rotate the overlap amount adjustment knob (13) until the display value of the overlap amount indicator (34) reaches an eighth preset value and then stop rotating, and lock it in place with the clearance locking device (75) and the overlap amount locking device (54).

2. The method for adjusting the shearing blade clearance and overlap amount of a trimming shear according to claim 1, characterized in that, the first preset value is 149.085 - 150.015 mm.

3. The method for adjusting the shearing blade clearance and overlap amount of a trimming shear according to claim 1, characterized in that, the second preset value is 0.14 - 0.16 mm.

4. The method for adjusting the shearing blade clearance and overlap amount of a trimming shear according to claim 1, characterized in that, the third preset value is 0.

5. The method for adjusting the shearing blade clearance and overlap amount of a trimming shear according to claim 1, characterized in that, the fourth preset value is 0.38 - 0.98 mm.

6. The method for adjusting the shearing blade clearance and overlap amount of a trimming shear according to claim 1, characterized in that, the fifth preset value is 0 mm.

7. The method for adjusting the shearing blade clearance and overlap amount of a trimming shear according to claim 1, characterized in that, the tolerance range is 0 - 0.015 - 0.025 mm.

8. The method for adjusting the shearing blade clearance and overlap amount of a trimming shear according to claim 1, characterized in that, The sixth preset value is -0.01 to 0.001 mm.

9. The method for adjusting the shearing blade clearance and overlapping amount of the trimming shears according to claim 1, characterized in that, the seventh preset value is 0.015 - 0.025 mm.

10. The method for adjusting the shearing blade clearance and overlapping amount of the trimming shears according to claim 1, characterized in that, the eighth preset value is 0.3 - 0.5 mm.

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