Derrick single-piece scribing and head milling device and scribing and head milling method thereof

Abstract

The invention discloses a derrick single piece scribing and head milling device which comprises a scribing platform, the upper surface of the scribing platform is a horizontal plane, a derrick single piece is placed on the upper surface of the scribing platform, a moving device is further installed on one side of the scribing platform, and a scribing device is installed on the moving device. At least two limiting plates are fixed to the side, away from the rear stand column, of the front stand column of the derrick single piece on the marking platform, the sides, close to the front stand column, of the multiple limiting plates are coplanar and parallel to the front stand column, and positioning devices are further arranged between the limiting plates and the front stand column. At least two limiting plates are symmetrically arranged on each of the two corresponding sides of the machining platform, and the machining platform is arranged on the side face of the end face milling machine. The problems that in the prior art, manual lineation precision is greatly influenced by human factors, two times of tool setting in end face milling needs to consume a large amount of time, and machining efficiency and the vertical precision of the end face and the front stand column are influenced are solved. The invention further discloses a derrick single piece scribing and head milling method.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of petroleum drilling rigs, and relates to a derrick single-piece line marking and milling head device. BACKGROUND

[0002] A derrick is a core equipment of a petroleum drilling rig. A front opening type derrick is a main derrick type of a land drilling rig. The front opening derrick is connected by a connecting frame from left and right derrick pieces, and the left and right derrick pieces are connected by multiple derrick single-pieces. The end faces of two adjacent derrick single-pieces directly contact each other. The drilling rig load is transmitted through the contact surface between the derrick single-pieces. The contact quality of the contact surface is required, and the overall straightness error of the left and right derrick pieces is also required. Therefore, the machining precision of the single-piece is required to be high.

[0003] The derrick single-piece is a truss structure, and its structure is shown in Figure 1 To ensure the overall straightness of the derrick and the contact of the end faces, the upper and lower end faces of the derrick are required to be perpendicular to the front column of the derrick, and the overall flatness of the end faces is required to be ensured. To ensure the flatness of the end faces and the perpendicularity between the end faces and the front column, the derrick single-piece is machined after being assembled and welded. The end face milling machine is usually used for milling the end face. This process is called milling head. The device for milling the head of the column includes a back plate in the utility model patent “A processing device for the end face of a derrick single-piece of a petroleum drilling rig” (ZL2015210566913). However, the use effect cannot meet the requirements. The wing plate of the front column is in line contact with the back plate. Due to the straightness manufacturing error of the front column of the derrick single-piece, the convex or concave points of the back plate set on the length direction of the front column will cause the perpendicular error between the two end faces of the single-piece and the column, and the perpendicularity between the end face and the column cannot be met, which causes the overall straightness error of the left and right derrick pieces after being assembled. In addition, the method for positioning the end head in the patent cannot be easily implemented. Due to the difference in the length of different single-pieces, the positioning of the processed end face for the head milling cannot be implemented, and the length difference of the derrick single-pieces is mostly beyond the moving range of the end face milling machine on the Y axis and cannot be machined. In addition, the positioning of the back plate in multiple positions also has too many back plate positions and affects the efficiency.

[0004] When the single piece of the derrick is combined, the actual size needs to be lofted, and the single piece milling head line is pre-planned according to the lofting. However, the derrick will be deformed and the length will change during the welding process. Therefore, the size of the pre-planned milling head line needs to be checked and the processing line needs to be marked before the single piece milling head is processed. The marking process uses the method of equal diagonal line size of the detection rectangle to check the perpendicularity of the milling head line and the front column. Most of the single pieces of the derrick are not parallel to the front and rear columns, and the establishment of the rectangle needs size conversion, which leads to large size error. The size needs to be checked repeatedly during the marking process, which consumes a certain amount of time. The manual marking precision is greatly affected by human factors. Moreover, the length of the single piece is mostly more than 10 meters, and the long distance tape measurement will cause the size precision error due to the sag. The height difference exists in the plane of part of the derrick body or there is an ear plate or other high point in the middle, which affects the size measurement precision, especially when the diagonal line size is measured.

[0005] When the end face is milled, the milling head line needs to be parallel to the X axis of the end face milling machine. The milling head line of the front and rear columns needs to be repeatedly adjusted and corrected for the positioning. After one end is milled, the other end needs to be milled by turning around. The positioning needs to be re-set. The two times of tool setting consume a large amount of time, which affects the processing efficiency. Moreover, the tool setting precision greatly affects the perpendicularity of the end face and the front column.

[0006] Therefore, a rapid marking and milling head device and method for the single piece of the derrick are needed, which can meet the precision requirement of the end face size of the milling head, meet the efficiency requirement, and reduce the difficulty and workload of the personnel operation. SUMMARY

[0007] The purpose of the present application is to provide a marking and milling head device for the single piece of the derrick, which solves the problems of the manual marking precision being greatly affected by human factors, the two times of tool setting for the end face milling consuming a large amount of time, affecting the processing efficiency and the perpendicularity of the end face and the front column.

[0008] Another purpose of the present application is to provide a marking and milling head method for the single piece of the derrick.

[0009] The technical solution adopted by the present application is a marking and milling head device for the single piece of the derrick, which comprises a marking platform. The upper surface of the marking platform is a horizontal plane. The single piece of the derrick is placed on the upper surface of the marking platform. A moving device is further installed on one side of the marking platform. The moving device is a three-coordinate machine tool gantry structure. A marking device is installed on the moving device. At least two limit plates are fixed on one side of the front column of the single piece of the derrick away from the rear column on the marking platform. The sides of the multiple limit plates close to the front column are coplanar and parallel to the front column. A positioning device is further arranged between the limit plate and the front column. The processing surface of a processing platform is a horizontal plane. At least two limit plates are symmetrically arranged on the corresponding two sides of the processing platform. The limit plates on the same side of the processing platform are coplanar, and the number and arrangement spacing of the limit plates are the same as those of the limit plates on the marking platform. The processing platform is arranged on the side surface of the end face milling machine.

[0010] The application is further characterized in that:

[0011] The mobile device comprises two parallel longitudinal rails distributed along the Y axis, the two longitudinal rails are jointly and slidingly connected with a transverse rail arranged along the X axis, the transverse rail is installed with a height direction rail distributed along the Z axis, the scribing device is slidingly installed on the height direction rail, the derrick monolithic piece is placed between the two longitudinal rails and the front stand is parallel to the Y axis direction, a scale is arranged on the longitudinal rail, and the scribing platform is located between the two longitudinal rails.

[0012] The positioning device comprises a positioning body arranged between the upper and lower flange plates of the I-shaped steel of the front stand close to the limiting plate, the lower end of the positioning body is in contact with the lower flange plate of the I-shaped steel of the front stand, a fixing bolt is arranged on the upper end face of the positioning body, the bolt head of the fixing bolt is tightly pressed against the upper flange plate of the front stand by rotating and adjusting the fixing bolt, at least two struts are fixed on the side of the positioning body close to the web of the I-shaped steel of the front stand, the two struts are perpendicular to the web of the I-shaped steel of the front stand and the end of the strut away from the positioning body is pressed against the web of the I-shaped steel of the front stand, a positioning bolt is further arranged on the side of the positioning body away from the web of the I-shaped steel of the front stand, during positioning, the head of the positioning bolt protrudes outside the flange plate of the I-shaped steel of the front stand and is in contact with the side of the limiting plate close to the front stand, and a locking nut is arranged on the positioning bolt.

[0013] The limiting plates located on both sides of the machining platform are parallel and correspondingly arranged, the limiting plates located on the same side of the machining platform are parallel to the Y axis of the face milling machine, the length direction of the machining platform is defined as the Y axis direction, the machining feeding direction is the X axis, and the distance between the limiting plates located on both sides of the machining platform is greater than the width size of the derrick monolithic piece.

[0014] The limiting plate comprises a vertical stand plate and a bottom plate connected to the bottom of the stand plate, the stand plate and the bottom plate are perpendicular to each other, the bottom plate is horizontally arranged, and the ends of the stand plate and the bottom plate away from each other are jointly connected with a reinforcing rib, and the limiting plate is fixedly connected with the machining platform or the scribing platform through the bottom plate to realize fixation.

[0015] If on the scribing platform, the sides of the plurality of stand plates away from the reinforcing rib are coplanar and parallel to the front stand, the head of the positioning bolt protrudes outside the flange plate of the I-shaped steel of the front stand and is in contact with the side of the stand plate close to the front stand.

[0016] If on the machining platform, the plurality of stand plates located on the same side of the machining platform are coplanar, the stand plates located on both sides of the machining platform are correspondingly and parallel arranged, and the distance between the stand plates on both sides is greater than the width size of the derrick monolithic piece, and the stand plates are parallel to the Y axis of the face milling machine.

[0017] The second technical scheme adopted by the application is a derrick monolithic piece scribing and milling head method, and the derrick monolithic piece scribing and milling head device is used, and the method is implemented according to the following steps:

[0018] Step 1, combine the well rig single piece and pre-mark the milling head line on the front and rear columns;

[0019] Step 2, place the pre-marked well rig single piece on the surface of the marking platform, so that the distance from the center of the I-beam web of the front column end to the vertical plate surface of the marking platform is equal, and the center line of the front column is parallel to the Y axis of the moving device, then install the positioning device and make the positioning device adhere to the limiting plate;

[0020] Step 3, use the moving device to drive the marking device to mark along the X axis direction according to the pre-marked milling head line at the ends of the front and rear columns;

[0021] Step 4, transfer the marked well rig single piece to the machining platform, place the well rig single piece so that the two positioning bolts adhere to the vertical plate on one side of the machining platform, and then use the face milling machine to process the end face according to the milling head line.

[0022] In step 2, the positioning device is installed and adheres to the limiting plate, which is specifically:

[0023] Put the two positioning devices into the space composed of the I-beam flange and web of the front column, adhere the lower end face of the positioning body to the lower flange of the front column, adhere the two struts to the web of the front column, tighten the upper flange of the front column with the rotating fixing bolt, firmly fix the positioning body on the front column, then rotate the positioning bolt to make the head extend and adhere to the limiting plate, and then rotate the locking nut to lock the position of the positioning bolt.

[0024] Step 3 is specifically:

[0025] Use the moving device to check the size of the milling head line marked during assembly according to the scale on the longitudinal guide rail, and then use the moving device to drive the marking device to mark along the X axis direction according to the pre-marked milling head line at the ends of the front and rear columns;

[0026] Step 4 is specifically: transfer the well rig single piece to the machining platform, place the well rig single piece so that the two positioning bolts adhere to the vertical plate on one side of the machining platform, press the well rig single piece, start the face milling machine, process one end face of the well rig single piece according to the milling head line, loosen the well rig single piece and turn it around, make the two positioning bolts adhere to the vertical plate on the other side of the machining platform, press the well rig single piece, and process the other end face of the well rig single piece.

[0027] The beneficial effects of the present application are:

[0028] The present application fixes the placement position of the single piece of derrick on the marking platform by installing the detachable positioning device on the single piece of derrick front upright column and cooperating with the limiting plate arranged on the marking platform, and the positioning device has repeated positioning accuracy for the placement and positioning of the single piece of derrick. The limiting plate is arranged on the machining platform of the end face milling machine, the single piece of derrick is quickly positioned and placed on the machining platform by the limiting plate on the machining platform and the positioning device, the influence of the line placement on the milling head efficiency is avoided, and the influence of the line accuracy error on the machining accuracy is also avoided. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a single piece of derrick structure schematic diagram;

[0030] Figure 2 is a structure schematic diagram of the marking platform in the single piece of derrick marking and milling head device of the present application;

[0031] Figure 3 is a structure schematic diagram of the machining platform in the single piece of derrick marking and milling head device of the present application;

[0032] Figure 4 is a structure schematic diagram of the positioning device installation in the single piece of derrick marking and milling head device of the present application;

[0033] Figure 5 is a structure schematic diagram of the positioning device in the single piece of derrick marking and milling head device of the present application;

[0034] Figure 6 is a structure schematic diagram of the limiting plate in the single piece of derrick marking and milling head device of the present application;

[0035] Figure 7 is a single piece of derrick turning processing schematic diagram in the single piece of derrick marking and milling head method of the present application.

[0036] In the figure, 1. front upright column, 2. cross brace, 3. rear upright column, 4. milling head line, 5. marking platform, 6. moving device, 6-1. longitudinal guide rail, 6-2. transverse guide rail, 7. limiting plate, 7-1. vertical plate, 7-2. bottom plate, 7-3. reinforcing rib, 8. positioning device, 8-1. fixing bolt, 8-2. positioning body, 8-3. positioning bolt, 8-4. locking nut, 8-5. support column, 9. marking device, 10. end face milling machine, 11. machining platform. DETAILED DESCRIPTION

[0037] The present application will be described in detail below in combination with the drawings and specific embodiments.

[0038] As Figure 1As shown, the derrick single piece mainly comprises a front column 1, a rear column 3 and a cross brace 2, the front column 1 and the rear column 3 are hot-rolled I-beams or welded I-beam structures, and a length allowance is reserved when the front column 1 and the rear column 3 are cut, the positions of the front column 1, the rear column 3 and the cross brace 2 are determined by lofting, and the lofting lines are combined, and a milling head line 4 is pre-marked on the front column 1 and the rear column 3 according to the lofting size.

[0039] Embodiment 1

[0040] The derrick single piece marking and milling head device of the present application has the structure as shown in the drawings, Figure 2 which comprises a marking platform 5, the upper surface of the marking platform 5 is a horizontal plane, the derrick single piece is placed on the upper surface of the marking platform 5, a moving device 6 is further installed on one side of the marking platform 5, the moving device 6 is a gantry structure of a three-coordinate machine tool, a marking device 9 is installed on the moving device 6, at least two limiting plates 7 are fixed on the side of the front column 1 of the derrick single piece away from the rear column 3 on the marking platform 5, the sides of the plurality of limiting plates 7 close to the front column 1 are coplanar and parallel to the front column 1, and a positioning device 8 is further arranged between the limiting plates 7 and the front column 1, as shown in the drawings, Figure 3 which further comprises a processing platform 11, the processing surface of the processing platform 11 is a horizontal plane, and at least two limiting plates 7 are symmetrically arranged on the corresponding two sides of the processing platform 11, the limiting plates 7 on the same side of the processing platform 11 are coplanar and have the same number and arrangement spacing as the limiting plates 7 on the marking platform 5, and the processing platform 11 is arranged on the side of the face milling machine 10.

[0041] The moving device 6 comprises two parallel longitudinal rails 6-1 distributed along the Y axis, a transverse rail 6-2 arranged along the X axis is commonly and slidably connected to the two longitudinal rails 6-1, a height-direction rail distributed along the Z axis is installed on the transverse rail 6-2, the marking device 9 is slidably installed on the height-direction rail, the derrick single piece is placed between the two longitudinal rails 6-1 and the front column 1 is parallel to the Y axis direction, a scale is arranged on the longitudinal rail 6-1, and the marking platform 5 is located between the two longitudinal rails 6-1.

[0042] As shown in the drawings, Figures 4-5As shown, the positioning device 8 includes a positioning body 8-2 arranged between the upper and lower flange plates of the I-beam of the front column 1 near the limiting plate 7. The lower end of the positioning body 8-2 is in contact with the lower flange plate of the I-beam of the front column 1. The upper end surface of the positioning body 8-2 is provided with a fixing bolt 8-1. The bolt head of the fixing bolt 8-1 is in abutment with the upper flange plate of the front column 1 by rotating and adjusting the fixing bolt 8-1. At least two supports 8-5 are fixed to the side of the positioning body 8-2 near the web of the I-beam of the front column 1. The two supports 8-5 are perpendicular to the web of the I-beam of the front column 1, and the ends of the supports 8-5 away from the positioning body 8-2 are in abutment with the web of the I-beam of the front column 1. The positioning body 8-2 is further provided with a positioning bolt 8-3 away from the web of the I-beam of the front column 1. During positioning, the head of the positioning bolt 8-3 protrudes outward from the flange plate of the I-beam of the front column 1 and is in contact with the side of the limiting plate 7 near the front column 1. A locking nut 8-4 is arranged on the positioning bolt 8-3.

[0043] The limiting plates 7 located on both sides of the machining platform 11 are parallel and correspondingly arranged. The limiting plates 7 located on the same side of the machining platform 11 are parallel to the Y-axis of the end face milling machine 10. The length direction of the machining platform 11 is defined as the Y-axis direction, and the machining feeding direction is the X-axis. The distance between the limiting plates 7 located on both sides of the machining platform 11 is greater than the width size of a single piece of the derrick.

[0044] As shown in the drawings, Figure 6 The limiting plate 7 includes a vertical stand plate 7-1 and a bottom plate 7-2 connected to the bottom of the stand plate 7-1. The stand plate 7-1 and the bottom plate 7-2 are perpendicular to each other. The bottom plate 7-2 is horizontally arranged. The ends of the stand plate 7-1 and the bottom plate 7-2 away from each other are jointly connected with a reinforcing rib 7-3. The limiting plate 7 is fixedly connected with the machining platform 11 or the scribing platform 5 through the bottom plate 7-2 to achieve fixation.

[0045] If on the scribing platform 5, the sides of the plurality of stand plates 7-1 away from the reinforcing rib 7-3 are coplanar and parallel to the front column 1. The head of the positioning bolt 8-3 protrudes outward from the flange plate of the I-beam of the front column 1 and is in contact with the side of the stand plate 7-1 near the front column 1.

[0046] If on the machining platform 11, the plurality of stand plates 7-1 located on the same side of the machining platform 11 are coplanar. The stand plates 7-1 located on both sides of the machining platform 11 are correspondingly and parallelly arranged. The distance between the stand plates 7-1 on both sides is greater than the width size of a single piece of the derrick. The stand plates 7-1 are parallel to the Y-axis of the end face milling machine 10.

[0047] In this embodiment, the working surface of the marking platform 5 is a horizontal plane, and the size range of the marking platform 5 meets the needs of single-piece marking of the derrick; the marking device 9 adopts a laser surface etching machine, which can perform laser surface marking on the column wing plate; the coverage range of the moving device 6 meets the size needs of platform marking; when the number of the limiting plates 7 is prepared, the limiting plates 7 are prepared according to the length range of the single piece of the derrick, and at least two limiting plates 7 are prepared at the ends of the front column 1; when marking, the single piece of the derrick is placed on the marking platform 5, and the wing plate of the front column 1 does not contact the stand plate 7-1; the distance from the center of the web at both ends of the front column to the surface of the stand plate 7-1 is equal, which indicates that the center line of the front column is parallel to the Y axis; after the positioning device 8 is fixed to the front column 1, the positioning bolt 8-3 is rotated and stretched to be in close contact with the stand plate 7-1, the locking nut 8-4 is tightened to lock the positioning bolt 8-3, the positioning size is fixed, the moving device 6 with the marking device 9 is moved to the corresponding position, and then the marking is performed along the X axis.

[0048] The processing platform 11 is horizontally arranged, the limiting plates 7 are symmetrically arranged in two rows on the processing platform 11, the size and number of the limiting plates 7 in each row are the same as those on the platform 5, the surface of the stand plate 7-1 is parallel to the Y axis of the end face milling machine 10, and the spacing size between the two rows of limiting plates 7 is greater than the width size of the single piece of the derrick; when the single piece is placed, the two positioning devices 8 fixed during marking of the single piece of the derrick are in close contact with one row of limiting plates 7, and the state on the rapid marking platform is reproduced, so that the center line direction of the front column 1 is parallel to the Y axis of the end face milling machine 10; after the end face milling machine 10 finds a milling head line 4, the end face milling machine 10 moves along the X axis to process one end face of the single piece of the derrick; the single piece of the derrick is turned over, so that the two positioning devices 8 are in close contact with the other row of limiting plates 7, and the front column 1 is still parallel to the Y axis; the other end face of the single piece of the derrick is processed.

[0049] Embodiment 2

[0050] On the basis of embodiment 1, the bolt head of the positioning bolt 8-3 and the fixed bolt 8-1 is a spherical surface, and the end of the support 8-5 is also a spherical surface.

[0051] The positioning body 8-2 is fixed with two supports 8-5 close to one side of the I-beam web of the front column 1, the two supports 8-5 are symmetrically fixed on the positioning body 8-2 along the center line of the positioning body 8-2, the shaft centers of the two supports 8-5 are parallel to the center line of the thread hole of the positioning bolt 8-3 and are in the same plane, the fixed bolt 8-1 is arranged on the upper end of the positioning body 8-2 at the thickness center position, after the fixed bolt 8-1 is tightened, the contact point between the lower end surface of the positioning body 8-2 and the fixed bolt 8-1 forms a triangle, which can prevent the positioning device 8 from being overturned and shifted due to slight knocking and impact in the horizontal direction during movement; the center line of the two supports 8-5 and the positioning body 8-2 also forms a triangle, which can prevent the positioning device 8 from being overturned and shifted due to slight knocking and impact in the horizontal direction during movement.

[0052] Example 3

[0053] The well derrick single piece line marking and milling head method adopts the well derrick single piece line marking and milling head device of Example 1 and is implemented according to the following steps:

[0054] Step 1, combine the well derrick single piece and pre-mark the milling head line 4 on the front column 1 and the rear column 3;

[0055] Step 2, place the well derrick single piece with pre-marked line on the surface of the line marking platform 5 so that the distance from the center of the I-beam web at the ends of the front column 1 to the surface of the vertical plate 7-1 on the line marking platform 5 is equal and the center line of the front column 1 is parallel to the Y-axis of the moving device 6, then place the two positioning devices 8 into the space formed by the I-beam flange and web of the front column, attach the lower end surface of the positioning body 8-2 to the lower flange of the front column, attach the two struts 8-5 to the web of the front column, tighten the rotating fixing bolt 8-1 against the upper flange of the front column, firmly fix the positioning body 8-2 on the front column 1, rotate the positioning bolt 8-3 so that the head is attached to the limiting plate 7, and then rotate the locking nut 8-4 to lock the position of the positioning bolt 8-3;

[0056] Step 3, use the moving device 6 to check the size of the milling head line marked during combination according to the scale on the longitudinal guide rail 6-1, and then use the moving device 6 to drive the line marking device 9 to mark the line along the X-axis direction according to the pre-marked milling head line 4 at the ends of the front column 1 and the rear column 3;

[0057] Step 4, transport the well derrick single piece after line marking to the processing platform 11, place the well derrick single piece so that the two positioning bolts 8-3 are attached to the vertical plate 7-1 on one side of the processing platform 11 as shown in Figure 3 , press the well derrick single piece, start the face milling machine 10 to process one end surface of the well derrick single piece according to the milling head line 4, loosen the well derrick single piece and turn it over as shown in Figure 7 , so that the two positioning bolts 8-3 are attached to the vertical plate 7-1 on the other side of the processing platform 11, press the well derrick single piece, and process the other end surface of the well derrick single piece.

[0058] In Step 1, lofting is performed according to the size of the well derrick single piece drawing, the front column 1 and the rear column 3 milling head line is pre-marked on the lofting position using a stone pen and a marking needle, the processing allowance is left at the ends of the columns, the well derrick single piece is welded and then deformed to ensure the overall flatness of the well derrick single piece and the straightness error of the columns.

[0059] In Step 2, place the well derrick single piece with pre-marked line on the surface of the line marking platform 5 so that the distance from the center of the I-beam web at the ends of the front column 1 to the surface of the vertical plate 7-1 on the line marking platform 5 is equal, and the control is within 0.5 mm.

[0060] The present application is characterized in that the fixing bolt 8-1 of the positioning device 8 can be extended in the height direction through the longitudinal internal thread, so as to adapt to different I-beam heights and facilitate the loading and unloading operation; the positioning bolt 8-3 can be extended in the horizontal direction through the transverse internal thread and extend to the outside of the I-beam wing plate, so as to adapt to different I-beam wing plate widths and eliminate the influence of the straightness error of the I-beam at different positions.

[0061] The mobile device 6 is a three-coordinate gantry structure, which can move along the X, Y and Z axes, so as to adapt to the single-piece line marking of the derrick with different length, width and height. Two or more limiting plates 7 can be arranged on the line marking platform 5 according to the length range of the single piece of the derrick, the surface of the vertical plate 7-1 is parallel to the Y axis, the distance between the two ends of the front column and the surface of the vertical plate 7-1 is controlled to be equal, so as to ensure that the center of the column is parallel to the Y axis, and the perpendicular accuracy of the drawn milling head line and the front column is ensured by the vertical accuracy of the horizontal guide rail 6-2 and the longitudinal guide rail 6-1 of the gantry. Two rows of limiting plates 7 are symmetrically arranged on the machining platform 11 in the same way as the line marking platform 5, the distance between the two rows of limiting plates 7 is greater than the width of the single piece of the derrick, so as to satisfy the end face machining of the single piece with different sizes and facilitate the hoisting operation, the point contact between the end surface of the two positioning bolts 8-4 and the plane of the vertical plate 7-1 ensures that the center line of the front column 1 is always along the Y axis direction, and the perpendicular accuracy of the machined end face and the front column is ensured by the perpendicular accuracy of the X axis and the Y axis of the end face milling machine 10.

Claims

1. A derrick single-piece scribe, milling head apparatus, characterized by, The drawing platform (5) is provided with a horizontal upper surface, and the derrick single piece is placed on the upper surface of the drawing platform (5), and the drawing platform (5) is further provided with a moving device (6) on one side, the moving device (6) is a three-coordinate machine tool gantry structure, the moving device (6) is provided with a drawing device (9), at least two limiting plates (7) are fixed on the drawing platform (5) on the side of the front column (1) of the derrick single piece away from the rear column (3), the plurality of limiting plates (7) are coplanar and parallel to the front column (1) on the side close to the front column (1), and the limiting plate (7) and the front column (1) are further provided with a positioning device (8), and the processing platform (11) is further provided with a processing platform (11), the processing surface of the processing platform (11) is a horizontal surface, and the processing platform (11) is provided on the side of the face milling machine (10).

2. The derrick monoskimming, milling head apparatus of claim 1, wherein, The moving device (6) comprises two parallel longitudinal rails (6-1) distributed along the Y axis, the two longitudinal rails (6-1) are slidably connected with a transverse rail (6-2) arranged along the X axis, the transverse rail (6-2) is provided with a height direction rail distributed along the Z axis, and the drawing device (9) is slidably installed on the height direction rail; the derrick single piece is placed between the two longitudinal rails (6-1) and the front column (1) is parallel to the Y axis direction; the longitudinal rails (6-1) are provided with a scale; and the drawing platform (5) is located between the two longitudinal rails (6-1).

3. The derrick monoskimming, milling head apparatus of claim 2, wherein, The positioning device (8) comprises a positioning body (8-2) arranged between the upper and lower flange plates of the I-shaped steel on the side close to the limiting plate (7) of the front column (1), the lower end of the positioning body (8-2) is in contact with the lower flange plate of the I-shaped steel of the front column (1), the upper end surface of the positioning body (8-2) is provided with a fixing bolt (8-1), the bolt head of the fixing bolt (8-1) is tightly pressed against the upper flange plate of the front column (1) by rotating and adjusting the fixing bolt (8-1), at least two supports (8-5) are fixed on the side close to the web of the I-shaped steel of the front column (1) of the positioning body (8-2), the two supports (8-5) are perpendicular to the web of the I-shaped steel of the front column (1), and the ends of the supports (8-5) away from the positioning body (8-2) are tightly pressed against the web of the I-shaped steel of the front column (1), and the positioning body (8-2) is further provided with a positioning bolt (8-3) on the side away from the web of the I-shaped steel of the front column (1), the head of the positioning bolt (8-3) protrudes from the outer edge of the flange plate of the I-shaped steel of the front column and is in contact with the side surface of the limiting plate (7) close to the front column (1) during positioning, and the positioning bolt (8-3) is provided with a locking nut (8-4).

4. The derrick monoskimming, milling head apparatus of claim 3, wherein, The limiting plates (7) located on both sides of the machining platform (11) are parallel and correspondingly arranged, the limiting plates (7) located on the same side of the machining platform (11) are parallel to the Y axis of the end face milling machine (10), the length direction of the machining platform (11) is defined as the Y axis direction, the machining feeding direction is the X axis, and the distance between the limiting plates (7) located on both sides of the machining platform (11) is greater than the single-piece width size of the derrick.

5. The derrick monoskimming, milling head apparatus of claim 4, wherein, The limiting plate (7) comprises a vertical plate (7-1) arranged vertically and a bottom plate (7-2) connected to the bottom of the vertical plate (7-1), the vertical plate (7-1) and the bottom plate (7-2) are perpendicular to each other, the bottom plate (7-2) is arranged horizontally, and the ends of the vertical plate (7-1) and the bottom plate (7-2) away from each other are jointly connected with a reinforcing rib (7-3), and the limiting plate (7) is fixedly connected with the machining platform (11) or the scribing platform (5) through the bottom plate (7-2) to realize fixation.

6. The derrick monoskimming, milling head apparatus of claim 5, wherein, If on the scribing platform (5), the sides of the plurality of vertical plates (7-1) away from the reinforcing rib (7-3) are coplanar and parallel to the front stand (1), the head of the positioning bolt (8-3) protrudes out of the outer edge of the wing plate of the front stand I-beam and is in contact with the side surface of the vertical plate (7-1) close to the front stand (1).

7. The derrick monoskimming, milling head apparatus of claim 6, wherein, If on the machining platform (11), the plurality of vertical plates (7-1) located on the same side of the machining platform (11) are coplanar, the vertical plates (7-1) located on both sides of the machining platform (11) are correspondingly and parallelly arranged, and the distance between the vertical plates (7-1) on both sides is greater than the single-piece width size of the derrick, and the vertical plates (7-1) are parallel to the Y axis of the end face milling machine (10).

8. A method of single-piece dicing, milling head for a derrick, characterized in that, The derrick single-piece scribing and milling head device is implemented according to the following steps. Step 1, combining the derrick single-piece and pre-scribing the milling head line (4) on the front stand (1) and the rear stand (3); Step 2, placing the pre-scribed derrick single-piece on the upper surface of the scribing platform (5) so that the distance from the center of the I-beam web at both ends of the front stand (1) to the surface of the vertical plate (7-1) of the scribing platform (5) is equal, and the center line of the front stand (1) is parallel to the Y axis of the moving device (6), then installing the positioning device (8) and making the positioning device (8) close to the limiting plate (7); Step 3, using the moving device (6) to drive the scribing device (9) to scribe along the X axis direction according to the pre-scribed milling head line (4) at both ends of the front stand (1) and the rear stand (3); Step 4, transferring the scribed derrick single-piece to the machining platform (11), placing the derrick single-piece so that the two positioning bolts (8-3) are close to the vertical plate (7-1) on one side of the machining platform (11), and then using the end face milling machine (10) to mill the end face according to the milling head line (4).

9. The derrick monoskimming, milling head method of claim 8, wherein, In the step 2, the positioning device (8) is installed and made close to the limiting plate (7). Two positioning devices (8) are put into the space composed of the front upright I-beam wing plates and web, the lower end surface of the positioning body (8-2) is attached to the lower wing plate of the front upright, the two struts (8-5) are attached to the web of the front upright, the rotating fixing bolt (8-1) is tightly pressed against the upper wing plate of the front upright, the positioning body (8-2) is firmly fixed on the front upright (1), the positioning bolt (8-3) is rotated to make the head extend and be attached to the limiting plate (7), and then the locking nut (8-4) is rotated to lock the position of the positioning bolt (8-3).

10. The mast single-piece line-up, milling head method of claim 9, wherein, The step 3 is specifically: The mobile device (6) is used to check the size of the milling head line drawn during combination according to the scale on the longitudinal guide rail (6-1), and then the mobile device (6) is used to drive the line drawing device (9) to draw a line on the front upright (1) and the rear upright (3) according to the pre-drawn milling head line (4) in the X-axis direction; The step 4 is specifically: the derrick single piece is transported to the machining platform (11), the derrick single piece is placed so that the two positioning bolts (8-3) are attached to the vertical plate (7-1) on one side of the machining platform (11), the derrick single piece is pressed, the end surface milling machine (10) is started to process one end surface of the derrick single piece according to the milling head line (4); the derrick single piece is loosened and turned over, the two positioning bolts (8-3) are attached to the vertical plate (7-1) on the other side of the machining platform (11), the derrick single piece is pressed, and the other end surface of the derrick single piece is processed according to the tool setting.

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