Device and method for measuring the rotation angle of header used for header drilling compensation processing

Abstract

The present invention relates to a device and method for measuring the rotation angle of a header used for compensation processing of header drilling. An angle plate is provided on the front end face of the end plate of the device, and the angle plate can rotate around the center of the end plate. An expansion ring is installed on the rear end face of the end plate, and the expansion ring is inserted into the non-clamping end of the header, so that the end plate and the angle plate can be close to the non-clamping end face of the header. A magnetic switch is provided on each horizontal line on both sides of the angle plate, and a bubble meter is provided on each horizontal line on both sides of the angle plate and located outside the magnetic switch. A digital display angle meter is provided on the vertical line of the angle plate, and an arrow is provided on the vertical line of the angle plate and located above the digital display angle meter. The processing method for compensating processing of header drilling of the present invention can efficiently replace the traditional method of manually measuring the deflection of the header body by pulling wires at both ends of the header, and after the header rotation angle measuring device is installed in place, it does not need to be repeatedly loaded and unloaded, which greatly reduces the work intensity of workshop operators and improves production efficiency.

Description

Technical Field

[0001] The invention relates to a header drilling device, in particular to a header drilling rotation angle measuring device and a processing method. Background Art

[0002] At present, during the drilling process of the product header by automated CNC equipment, one end of the header is clamped and fixed on the rotating mechanism of the CNC equipment. When the fixed end (clamping end) of the header is rotated by an angle, the angle is set to: t, and the other end (non-clamping end) of the header is also rotated by the corresponding angle t. Affected by the combined superposition of the roundness and deflection of the header end, the actual angle required to rotate the non-clamping end of the header is not consistent with the rotation angle of the fixed end, and an additional angle compensation value needs to be added. Therefore, in the actual processing process, if the angle rotation compensation value is not considered, the rows of pipe holes in the header processed in this state will result in a large angle deviation between the pipe holes processed at the non-clamping end of the header and the dimensions marked on the drawing, which does not meet the product header processing requirements. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the present invention is to provide a device and method for measuring the rotation angle of a header used for header drilling compensation processing.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is: a device for measuring the rotation angle of a header used for header drilling compensation processing, comprising an end plate, an angle plate, and an expansion ring. An angle plate is provided on the front end face of the end plate, and the angle plate can rotate around the center of the end plate. An expansion ring is installed on the rear end face of the end plate, and the expansion ring is inserted into the non-clamping end of the header, so that the end plate and the angle plate can be tightly attached to the non-clamping end face of the header. A magnetic switch is provided on each horizontal line on both sides of the angle plate, a bubble meter is provided on each horizontal line on both sides of the angle plate and located outside the magnetic switch, a digital display angle meter is provided on the vertical line of the angle plate, and an arrow is provided on the vertical line of the angle plate and located above the digital display angle meter.

[0005] Furthermore, the end plate is in the shape of a circular plate, and its outer diameter is the same as that of the header. A positioning core shaft is provided on the right side of the end plate and at the center, and a threaded blind hole is provided on the left side of the end plate and at the center.

[0006] Furthermore, the angle plate is in the shape of a circular plate, the outer diameter of the angle plate is smaller than the outer diameter of the end plate, a through hole is provided at the center of the angle plate, and a cross center line is provided on the through hole of the angle plate.

[0007] Furthermore, the through hole in the angle plate is installed on the positioning core shaft in the end plate, and the angle plate can realize the fixed-axis rotation function around the positioning core shaft in the end plate; when the magnetic switch in the angle plate is turned on, the angle plate is affected by the magnetic force, so that the angle plate is adsorbed on the end plate, and the angle plate cannot realize the fixed-axis rotation function around the positioning core shaft in the end plate; when the magnetic switch in the angle plate is closed, the angle plate can realize the fixed-axis rotation function around the positioning core shaft in the end plate.

[0008] Furthermore, the expansion ring is in the shape of a stepped shaft, and an external thread is provided at the right end of the expansion ring; a spring sheet is provided on the left side of the expansion ring, and the spring sheet is set in a cross shape; the external thread in the expansion ring is matched and connected with the threaded blind hole in the end plate, and is fixed by tightening the thread, and the expansion ring and the end plate are set to the same center.

[0009] Furthermore, the expansion ring is inserted into the non-clamping end of the collection box through the spring sheet, which can make the center of the end plate, the angle plate and the center of the non-clamping end of the collection box on the same axis, wherein the spring sheet and the interior of the collection box are in an expanded state, and there will be no slippage between the expansion ring and the collection box. The expansion ring and the end plate are fixed by a threaded connection, which can fix the end plate at the right end port of the collection box without slipping.

[0010] A header drilling compensation processing method adopts a header rotation angle measuring device for header drilling compensation processing, and the steps are as follows:

[0011] Step 1: First, use the three-jaw chuck of the CNC drilling machine to clamp the header clamping fixed end on the left end of the header, and then install the header rotation angle measuring device on the non-clamping end of the header on the right end of the header, and make the spring sheet in the expansion ring and the inside of the header in an expansion state, so that there will be no slip between the expansion ring and the header, and the expansion ring and the end plate are fixed by threaded connection, so that the end plate is fixed at the non-clamping end port of the header, and there will be no slipping;

[0012] Step 2: Through the control of the CNC drilling machine equipment, the three-jaw chuck can be rotated clockwise or counterclockwise, and the header can also be rotated clockwise or counterclockwise synchronously. A stylus is installed on the main shaft of the equipment, and the L1 area of ​​the header where the deflection value of the raw material body is S1 and the L2 area of ​​the header where the body splicing deflection value is S2 are found by the stylus; when the S1 arch reaches the highest point, the left end of the header sets this position as the header processing zero point as the first reference; synchronously set the header rotation angle measuring device at the right end port of the header, first turn off the magnetic switch in the angle plate, and rotate the angle plate so that the two bubble meters on the horizontal lines on both sides of the angle plate are in a horizontal state, that is, when the digital display angle meter on the angle plate shows 0 degrees, turn on the magnetic switch in the angle plate so that the angle plate is adsorbed and fixed on the end plate, and the angle plate cannot rotate relative to the end plate, so that the angle plate and the end plate are in a fixed state; complete the zero position setting corresponding to the highest point on the right end of the header as the second reference and mark the point at the top position of the end plate;

[0013] Step 3: Start the CNC drilling machine to complete the processing of the first row of pipe holes in the header; the straightness of the pipe holes in the L1 area of ​​the header is guaranteed by the equipment travel mechanism; the pipe holes in the L2 area of ​​the header are processed to point M, and the equipment is manually paused to start the straightness of the pipe holes. The highest point is captured by the left and right tracking of the equipment. Starting from point M, the equipment is simulated to complete the empty stroke of the L2 area of ​​the header, and the drilling spindle of the equipment is automatically realized by gradual radial offset until the processing operation of the right end hole of the header is completed. The actual pipe hole processing center at the right end of the header is measured relative to the highest point of the right end of the header, that is, the distance deviation between the second reference and the top position of the end plate. By correcting the radial displacement value of the equipment and compensating the radial displacement of the pipe hole processing, the purpose of correcting the S2 point deviation is achieved; then the equipment is returned to point M, and the equipment is started to complete the drilling processing of the L2 area of ​​the header;

[0014] Step 4:

[0015] 1) After the first row of pipe holes of the header is processed, the left end of the header will rotate an angle t through program setting, that is, it will enter the processing state of the a row of pipe holes, where the header rotation angle t is set by the equipment program;

[0016] 2) At the right end of the header, mark the angle of the a row of pipe holes on the drawing, convert the pipe hole angle into arc length manually at the right end of the header, and consider the roundness error of the port at the right end of the header to determine the position of the a' pipe hole, and mark the a' pipe hole position on the end plate;

[0017] 3) Turn off the magnetic switch in the angle plate, rotate the angle plate so that the arrow in the angle plate is aligned with the a' mark in the end plate, and then turn on the magnetic switch in the angle plate so that the angle plate is adsorbed and fixed on the end plate;

[0018] Step 5: Start the CNC drilling machine to process the second row of pipe holes in the header. The pipe hole processing in the header L1 area is automatically controlled by the program without manual intervention. The pipe holes in the header L2 area are processed to point M, and the equipment is manually paused and the current header angle is recorded. The header rotation is manually set to a compensation angle. The arrow in the angle plate in the header rotation angle measuring device at the right end of the header is required to be used as a reference. When the two bubble meters on the horizontal lines on both sides of the angle plate are in a horizontal state, that is, when the digital display angle meter on the angle plate shows 0 degrees, that is, when the arrow in the angle plate is at the highest point , determine that the highest point on the rightmost end of the header is at point a', the actual rotation angle of the device corresponding to point a' is t', and the rotation angle of the device corresponding to point a according to the program setting is t, where the logical relationship of the angle compensation value is: t'-t, where the compensation value is positive, it is set to increase the rotation angle; the compensation value is negative, it is set to decrease the rotation angle; start the equipment and complete the processing operation of the second row of remaining pipe holes in the header L2 area; after all the second row of pipe holes in the header are processed, manually pause the equipment, manually set to remove the header angle compensation, and restore to the previously recorded header angle;

[0019] Repeat the above steps to perform subsequent pipe row drilling operations on the header.

[0020] The beneficial effects of the present invention are:

[0021] The present invention discloses a compensation processing method for drilling a header and a device for measuring the rotation angle of a header, wherein the device can quickly and accurately locate the center of the non-clamping end face of the product header. When the clamping fixed end (clamping end) of the header rotates an angle, the device can accurately feedback the actual rotation angle value of the other end (non-clamping end) of the header. The compensation processing method for drilling a header disclosed by the present invention corrects the rows of tube holes in the sudden change area of ​​deflection by artificial rotation, so that the angular size deviations of the rows of tube holes processed at both ends of the product header in the circumferential direction can meet the tolerance requirements of the drawing.

[0022] In addition, the present invention discloses a header drilling compensation processing method and a header rotation angle measuring device, which have significant advantages in measurement efficiency and measurement accuracy, and can effectively replace the traditional method of manually measuring the deflection of the header body by pulling wires at both ends of the header. After the header rotation angle measuring device is installed in place, it does not need to be repeatedly loaded and unloaded, which greatly reduces the work intensity of workshop operators and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the non-clamping end structure of the header;

[0024] Figure 2 for Figure 1 Left view of

[0025] Figure 3 It is a structural schematic diagram of the device for measuring the rotation angle of the header of the present invention;

[0026] Among them: (a) is the main view, (b) is the right view;

[0027] Figure 4 is a schematic diagram of the end plate structure;

[0028] Figure 5 is a schematic diagram of the angle plate structure;

[0029] Figure 6 for Figure 5 Left view of

[0030] Figure 7 It is a schematic diagram of the expansion ring structure;

[0031] Figure 8 for Figure 7 Left view of

[0032] Fig. 9 Schematic diagrams of three usage states of the header rotation angle measuring device of the present invention;

[0033] Figure 10 to Figure 13 It is a schematic diagram of the steps of the header drilling compensation processing method of the present invention. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] like Figure 3 As shown in (a) and (b) of the figure, a device for measuring the rotation angle of a header used for header drilling compensation processing comprises an end plate 1, an angle plate 2 and an expansion ring 3. An angle plate 2 is provided on the front end surface of the end plate 1, and the angle plate 2 can rotate around the center of the end plate 1. An expansion ring 3 is installed on the rear end surface of the end plate 1. The expansion ring 3 is inserted into the non-clamping end of the header, so that the end plate 1 and the angle plate 2 are closely attached to the end surface of the non-clamping end of the header (the non-clamping end of the header, see Figure 1 , 2).

[0036] like Figure 4 As shown, the end plate 1 is set to be a circular plate shape, and the outer diameter of the end plate 1 is set to Φ1, wherein the value of Φ1 is the same as the outer diameter Φ1 of the header. A positioning mandrel 1-1 is provided on the right side of the end plate 1 and at the center, and a threaded blind hole 1-2 is provided on the left side of the end plate 1 and at the center.

[0037] like Figure 5, as shown in Figure 6, the angle plate 2 is set to a circular plate shape, and the outer diameter of the angle plate 2 is set to Ф2, wherein the value of Ф2 is smaller than the outer diameter Ф1 of the end plate. A through hole 2-1 is provided at the center of the angle plate 2. The through hole of the angle plate 2 is set to a cross center line, wherein a magnetic switch 2-3 is provided on each of the horizontal lines on both sides of the angle plate 2, and a bubble meter 2-2 is provided on each of the horizontal lines on both sides of the angle plate 2 and located outside the magnetic switch 2-3. A digital display angle meter 2-4 is provided on the vertical line of the angle plate 2, and an arrow 2-5 is provided on the vertical line of the angle plate 2 and located above the digital display angle meter 2-4.

[0038] The through hole 2-1 in the angle plate 2 is installed on the positioning core shaft 1-1 in the end plate 1, and the angle plate 2 can realize the fixed axis rotation function around the positioning core shaft 1-1 in the end plate 1. When the magnetic switch 2-3 in the angle plate 2 is turned on, the angle plate 2 is affected by the magnetic force, so that the angle plate 2 is adsorbed on the end plate 1, and the angle plate 2 cannot realize the fixed axis rotation function around the positioning core shaft 1-1 in the end plate 1. When the magnetic switch 2-3 in the angle plate 2 is turned off, the angle plate 2 can realize the fixed axis rotation function around the positioning core shaft 1-1 in the end plate 1.

[0039] like Figure 7 , as shown in FIG8 , the expansion ring 3 is set in a stepped shaft shape, and an external thread 3-1 is provided at the right end of the expansion ring 3. A spring sheet 3-2 is provided on the left side of the expansion ring 3, and the spring sheet 3-2 is set in a cross shape. The external thread 3-1 in the expansion ring 3 and the threaded blind hole 1-2 in the end plate 1 are set to be matched and connected, and are fixed by screwing the thread, and the expansion ring 3 and the end plate 1 are set to be the same center.

[0040] The spring sheet 3-2 in the expansion ring 3 is inserted into the non-clamping end of the header, so that the end plate 1 and the angle plate 2 are close to the end surface of the non-clamping end of the header. On the one hand, the center of the end plate 1 and the angle plate 2 can be on the same axis as the center of the non-clamping end of the header. On the other hand, the spring sheet 3-2 and the inside of the header are in an expansion state, and the expansion ring 3 and the header will not slip. The expansion ring 3 and the end plate 1 are fixed by threaded connection, which can fix the end plate 1 at the right end port of the header without slipping.

[0041] In order to make the present invention more clearly understood, a preferred embodiment is provided for a header drilling compensation processing method, and the attached Figures 9 to 13 The detailed description is as follows.

[0042] Step 1:

[0043] The product header is set to an open state at both ends. First, place the header on the support of the CNC drilling machine equipment. The left end of the header is clamped and fixed by the three-jaw chuck of the equipment (set as the header clamping and fixing end (clamping end)), and the header is connected and fixed with the CNC drilling machine equipment. The header rotation angle measuring device is installed on the right end port of the header (set as the non-clamping end). The spring sheet 3-2 in the expansion ring 3 is inserted into the inside of the header, where the spring sheet 3-2 and the inside of the header are in an expansion state, and there is no slippage between the expansion ring 3 and the header. The expansion ring 3 and the end plate 1 are fixed by threaded connection, which can fix the end plate 1 at the right end port of the header without slipping.

[0044] Step 2:

[0045] Through the control of the CNC drilling machine, the three-jaw chuck can rotate clockwise / counterclockwise, and the header can also rotate clockwise / counterclockwise synchronously. Install a stylus on the main shaft of the equipment, and use the stylus to find the header L1 area (raw material body deflection value S1); header L2 area (body splicing deflection value S2).

[0046] When the S1 arch reaches the highest point, the fixed end of the header clamp sets this position as the header processing zero point as the first reference.

[0047] The header rotation angle measuring device at the right end port of the header is set synchronously. First, the magnetic switch 2-3 in the angle plate 2 is closed. By rotating the angle plate 2, the two bubble meters 2-2 on the horizontal lines on both sides of the angle plate 2 are in a horizontal state, that is, when the digital display angle meter 2-4 on the angle plate 2 shows 0 degrees, the magnetic switch 2-3 in the angle plate 2 is turned on, so that the angle plate 2 is adsorbed and fixed on the end plate 1. The angle plate 2 cannot rotate relative to the end plate 1, and the parts are in a fixed state. That is, by setting a header rotation angle measuring device, the highest point on the right end of the header also completes the corresponding zero position setting, which serves as the second reference and marks the point at the top position of the end plate.

[0048] Step 3:

[0049] Start the CNC drilling machine to complete the processing of the first row of pipe holes of the header.

[0050] The straightness of the pipe holes in the L1 area of ​​the header (the deflection value of the raw material body S1) is ensured by the equipment travel (guide rail) mechanism.

[0051] In the L2 area of ​​the header (body splicing deflection value S2), the pipe hole is processed to point M. The equipment is manually paused, and the pipe hole straightness is realized by turning on the left and right tracking (highest point capture) function of the equipment. Starting from point M, the equipment is simulated to complete the empty stroke of the L2 area. The drilling spindle of the equipment automatically realizes gradual radial offset until the processing operation of the rightmost hole is completed. The distance deviation between the actual pipe hole processing center at the rightmost end of the header and the highest point of the right end of the header (the second datum, the top position of the end plate) is measured. By correcting the radial displacement value of the equipment and compensating the radial displacement of the pipe hole processing, the purpose of correcting the S2 point deviation is achieved.

[0052] Then return the equipment to point M, start the equipment, and complete the drilling process in the L2 area of ​​the header.

[0053] Step 4:

[0054] 1) After the first row of pipe holes of the header is processed, the left end of the header will rotate an angle t through program setting, that is, enter the processing state of the a row of pipe holes. The header rotation angle t is set by the equipment program.

[0055] 2) At the right end of the header, mark the angle of the a row of pipe holes on the drawing, convert the pipe hole angle into arc length manually at the right end of the header, and consider the roundness error of the port at the right end of the header to determine the position of the a' pipe hole, and mark the a' pipe hole position on the end plate 1.

[0056] 3) First, turn off the magnetic switch 2-3 in the angle plate 2, and rotate the angle plate 2 so that the arrow 2-5 in the angle plate 2 is aligned with the a' mark in the end plate 1, and then turn on the magnetic switch 2-3 in the angle plate 2 so that the angle plate 2 is adsorbed and fixed on the end plate 1.

[0057] Step 5:

[0058] Start the CNC drilling machine to process the second row of pipe holes in the header.

[0059] In the L1 area of ​​the header (the deflection value of the raw material body is S1), the pipe hole processing is automatically controlled by the program without manual intervention.

[0060] In the L2 area of ​​the header (body splicing deflection value S2), the pipe hole is processed to point M, the equipment is manually paused and the current header angle is recorded, and a compensation angle of the header rotation is manually set. The arrow 2-5 in the angle plate 2 in a header rotation angle measuring device on the right end of the header is required to be used as a reference. When the two bubble meters 2-2 on the horizontal lines on both sides of the angle plate 2 are in a horizontal state, that is, the digital display angle meter 2-4 on the angle plate 2 shows 0 degrees, that is, the arrow 2-5 in the angle plate 2 is at the highest point, it is determined that the highest point on the rightmost end of the header is at point a'. The actual rotation angle of the device corresponding to point a' is t', and the rotation angle of the device corresponding to point a is set to t according to the program. The logical relationship of the angle compensation value is: t'-t, where the compensation value is positive, and the rotation angle needs to be increased; the compensation value is negative, and the rotation angle needs to be reduced.

[0061] Turn on the equipment and complete the processing of the remaining pipe holes in the second row of the header (header L2 area).

[0062] After all the second row of pipe holes of the header are processed, the equipment is manually paused, and the header angle compensation is manually set to be removed and restored to the previously recorded header angle.

[0063] Repeat the above steps to perform subsequent pipe row drilling operations on the header.

[0064] Although the present invention is disclosed as above by preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be based on the definition of the claims.

Claims

1. A device for measuring the rotation angle of a header used for header drilling compensation processing, characterized in that: It includes an end plate, an angle plate and an expansion ring. The front end surface of the end plate is provided with an angle plate, and the angle plate can rotate around the center of the end plate. The rear end surface of the end plate is provided with an expansion ring, which is inserted into the non-clamping end of the collecting box, so that the end plate and the angle plate can be tightly attached to the non-clamping end surface of the collecting box. A magnetic switch is provided on each horizontal line on both sides of the angle plate, a bubble meter is provided on each horizontal line on both sides of the angle plate and located outside the magnetic switch, a digital display angle meter is provided on the vertical line of the angle plate, and an arrow is provided on the vertical line of the angle plate and located above the digital display angle meter.

2. The device for measuring the rotation angle of a header used for header drilling compensation processing according to claim 1 is characterized in that: The end plate is in the shape of a circular plate, and its outer diameter is the same as that of the header. A positioning mandrel is provided on the right side of the end plate and at the center, and a threaded blind hole is provided on the left side of the end plate and at the center.

3. The device for measuring the rotation angle of a header used for header drilling compensation processing according to claim 1 is characterized in that: The angle plate is in the shape of a circular plate, the outer diameter of the angle plate is smaller than the outer diameter of the end plate, a through hole is provided at the center of the angle plate, and a cross center line is provided on the through hole of the angle plate.

4. The device for measuring the rotation angle of a header used for header drilling compensation processing according to claim 3 is characterized in that: The through hole in the angle plate is installed on the positioning core shaft in the end plate, and the angle plate can realize the fixed-axis rotation function around the positioning core shaft in the end plate; when the magnetic switch in the angle plate is turned on, the angle plate is affected by the magnetic force, so that the angle plate is adsorbed on the end plate, and the angle plate cannot realize the fixed-axis rotation function around the positioning core shaft in the end plate; when the magnetic switch in the angle plate is closed, the angle plate can realize the fixed-axis rotation function around the positioning core shaft in the end plate.

5. The device for measuring the rotation angle of a header used for header drilling compensation processing according to claim 1 is characterized in that: The expansion ring is in the shape of a stepped shaft, and an external thread is provided at the right end of the expansion ring; a spring sheet is provided on the left side of the expansion ring, and the spring sheet is set in a cross shape; the external thread in the expansion ring is matched and connected with the threaded blind hole in the end plate, and is fixed by tightening the thread, and the expansion ring and the end plate are set to have the same center.

6. The device for measuring the rotation angle of a header used for header drilling compensation processing according to claim 5 is characterized in that: The expansion ring is inserted into the non-clamping end of the header through the spring sheet, which can make the center of the end plate, the angle plate and the center of the non-clamping end of the header be on the same axis, wherein the spring sheet and the interior of the header are in an expanded state, and there will be no slippage between the expansion ring and the header. The expansion ring and the end plate are fixed by a threaded connection, which can fix the end plate to the right end port of the header without slipping.

7. A header drilling compensation processing method, using a header rotation angle measuring device for header drilling compensation processing, characterized in that: The steps are: Step 1: First, use the three-jaw chuck of the CNC drilling machine to clamp the header clamping fixed end on the left end of the header, and then install the header rotation angle measuring device on the non-clamping end of the header on the right end of the header, and make the spring sheet in the expansion ring and the inside of the header in an expansion state, so that there will be no slip between the expansion ring and the header, and the expansion ring and the end plate are fixed by threaded connection, so that the end plate is fixed at the non-clamping end port of the header, and there will be no slipping; Step 2: Through the control of the CNC drilling machine equipment, the three-jaw chuck can be rotated clockwise or counterclockwise, and the header can also be rotated clockwise or counterclockwise synchronously. A stylus is installed on the main shaft of the equipment, and the L1 area of ​​the header where the deflection value of the raw material body is S1 and the L2 area of ​​the header where the body splicing deflection value is S2 are found by the stylus; when the S1 arch reaches the highest point, the left end of the header sets this position as the header processing zero point as the first reference; synchronously set the header rotation angle measuring device at the right end port of the header, first turn off the magnetic switch in the angle plate, and rotate the angle plate so that the two bubble meters on the horizontal lines on both sides of the angle plate are in a horizontal state, that is, when the digital display angle meter on the angle plate shows 0 degrees, turn on the magnetic switch in the angle plate so that the angle plate is adsorbed and fixed on the end plate, and the angle plate cannot rotate relative to the end plate, so that the angle plate and the end plate are in a fixed state; complete the zero position setting corresponding to the highest point on the right end of the header as the second reference and mark the point at the top position of the end plate; Step 3: Start the CNC drilling machine to complete the processing of the first row of pipe holes in the header; the straightness of the pipe holes in the L1 area of ​​the header is guaranteed by the equipment travel mechanism; the pipe holes in the L2 area of ​​the header are processed to point M, and the equipment is manually paused to start the straightness of the pipe holes. The highest point is captured by the left and right tracking of the equipment. Starting from point M, the equipment is simulated to complete the empty stroke of the L2 area of ​​the header, and the drilling spindle of the equipment is automatically realized by gradual radial offset until the processing operation of the right end hole of the header is completed. The actual pipe hole processing center at the right end of the header is measured relative to the highest point of the right end of the header, that is, the distance deviation between the second reference and the top position of the end plate. By correcting the radial displacement value of the equipment and compensating the radial displacement of the pipe hole processing, the purpose of correcting the S2 point deviation is achieved; then the equipment is returned to point M, and the equipment is started to complete the drilling processing of the L2 area of ​​the header; Step 4: 1) After the first row of pipe holes of the header is processed, the left end of the header will rotate an angle t through program setting, that is, it will enter the processing state of the a row of pipe holes, where the header rotation angle t is set by the equipment program; 2) At the right end of the header, mark the angle of the a row of pipe holes on the drawing, convert the pipe hole angle into arc length manually at the right end of the header, and consider the roundness error of the port at the right end of the header to determine the position of the a' pipe hole, and mark the a' pipe hole position on the end plate; 3) Turn off the magnetic switch in the angle plate, rotate the angle plate so that the arrow in the angle plate is aligned with the a' mark in the end plate, and then turn on the magnetic switch in the angle plate so that the angle plate is adsorbed and fixed on the end plate; Step 5: Start the CNC drilling machine to process the second row of pipe holes in the header. The pipe hole processing in the header L1 area is automatically controlled by the program without manual intervention. The pipe holes in the header L2 area are processed to point M, and the equipment is manually paused and the current header angle is recorded. The header rotation is manually set to a compensation angle. The arrow in the angle plate in the header rotation angle measuring device at the right end of the header is required to be used as a reference. When the two bubble meters on the horizontal lines on both sides of the angle plate are in a horizontal state, that is, when the digital display angle meter on the angle plate shows 0 degrees, that is, when the arrow in the angle plate is at the highest point , determine that the highest point on the rightmost end of the header is at point a', the actual rotation angle of the device corresponding to point a' is t', and the rotation angle of the device corresponding to point a according to the program setting is t, where the logical relationship of the angle compensation value is: t'-t, where the compensation value is positive, it is set to increase the rotation angle; the compensation value is negative, it is set to decrease the rotation angle; start the equipment and complete the processing operation of the second row of remaining pipe holes in the header L2 area; after all the second row of pipe holes in the header are processed, manually pause the equipment, manually set to remove the header angle compensation, and restore to the previously recorded header angle; Repeat the above steps to perform subsequent pipe row drilling operations on the header.

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