CN212398558U - Friction welding end face structure of drill pipe body and drill pipe joint - Google Patents
Friction welding end face structure of drill pipe body and drill pipe joint Download PDFInfo
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- CN212398558U CN212398558U CN202021131586.2U CN202021131586U CN212398558U CN 212398558 U CN212398558 U CN 212398558U CN 202021131586 U CN202021131586 U CN 202021131586U CN 212398558 U CN212398558 U CN 212398558U
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Abstract
The utility model discloses a friction welding end face structure of drilling rod body and tool joint, its characterized in that: the drill rod pipe joint comprises a drill rod pipe body and a drill rod joint, wherein the friction welding end face of one of the drill rod pipe body and the drill rod joint is an outer convex welding end face of an outer convex curved surface structure, and the friction welding end face of the other one of the drill rod pipe body and the drill rod joint is an inner concave welding end face of an inner concave curved surface structure which can be in zero-clearance fit with the outer convex welding end face. The utility model discloses can increase friction welding cross-section, and then increase welding seam load, promote welding seam tensile strength, reduce the drilling rod better because of transshipping emergence fracture probability in the operation, improve the life of drilling rod.
Description
Technical Field
The utility model relates to a colliery gas takes out and adopts the manufacturing field of drilling rod, especially relates to a friction weld welding terminal surface structure of drilling rod body and tool joint.
Background
The 'first pumping and then mining' is a guideline for coal mine safety production, namely before coal mining, gas pumping is firstly carried out on a coal seam, and gas in the coal seam is reduced to be below a safe concentration. The gas extraction directional drilling machine is main equipment for gas extraction drilling, and the drill rod is a necessary tool for gas extraction drilling operation. The drill rod consists of a male joint, a female joint and a pipe body, wherein the male joint and the female joint are respectively connected with the pipe body into a whole through friction welding.
At present, when friction welding is performed between a drill pipe body and a drill pipe joint, the end face of the pipe body and the end face of the joint root are generally processed into a plane perpendicular to an axis and then directly subjected to friction welding. However, when friction welding is performed on a pipe body and a joint of a part of thin-wall drill rod, especially a thin-wall thick drill rod with a larger diameter, if the welding end face structure is adopted, the welding section is not large enough, and after welding, the defects of small welding line load, insufficient tensile strength and the like exist, and finally, the drill rod is easy to overload and break in large-diameter drilling operation.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
An object of the utility model is to provide a friction welding end face structure of drilling rod body and tool joint, the welding seam load that mainly solves above-mentioned prior art existence is little, the technical problem that tensile strength is not enough, adopts the utility model discloses can increase friction welding cross-section, and then increase welding seam load, promote welding seam tensile strength, reduce the drilling rod better because of transshipping the cracked probability of emergence in the operation, improve the life of drilling rod.
(II) technical scheme
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a friction weld welding terminal surface structure of drilling rod body and tool joint which characterized in that: the drill rod pipe joint comprises a drill rod pipe body and a drill rod joint, wherein the friction welding end face of one of the drill rod pipe body and the drill rod joint is an outer convex welding end face of an outer convex curved surface structure, and the friction welding end face of the other one of the drill rod pipe body and the drill rod joint is an inner concave welding end face of an inner concave curved surface structure which can be in zero-clearance fit with the outer convex welding end face.
Furthermore, the outer convex welding end face is of an outer convex annular cone structure consisting of a convex inner conical surface and a convex outer conical surface, the intersection line of the convex inner conical surface and the convex outer conical surface is circular, and the included angle between the convex inner conical surface and the convex outer conical surface is a convex included angle; the concave welding end face is of a concave annular cone structure consisting of a concave inner conical surface and a concave outer conical surface, the intersection line of the concave inner conical surface and the concave outer conical surface is circular, and the included angle between the concave inner conical surface and the concave outer conical surface is a concave included angle; the convex included angle is equal to the concave included angle in size.
Further, the convex included angle and the concave included angle are both 60-90 degrees.
Furthermore, the convex inner conical surface and the convex outer conical surface are equal in area, and the concave inner conical surface and the concave outer conical surface are equal in area.
(III) advantageous effects
Compared with the prior art, the utility model provides a friction welding terminal surface structure of drilling rod body and tool joint possesses following beneficial effect: before welding drilling rod body and tool joint, the welding cross-section to drilling rod body and tool joint processes, the evagination welding terminal surface of processing into evagination shape curved surface structure with one of them friction welding terminal surface of drilling rod body and tool joint, the indent welding terminal surface of the interior shape curved surface structure that matches with evagination welding terminal surface is processed into to another friction welding terminal surface, can increase the welding cross-section of drilling rod body and tool joint like this, make the welding seam load increase after the welding is accomplished, the welding seam has better tensile strength, be difficult for splitting in the operation process, and then promoted the life of drilling rod, practice thrift the running cost.
In recent years, the directional rig technique of gas drainage develops towards big moment of torsion, big propulsive force, major diameter drilling rod, big aperture operation direction fast, uses the utility model discloses can overcome the drilling rod body and the drill rod joint welding course of working of major diameter, the thick drilling rod of thin wall defect problem that the friction weld welding cross-section is little, the welding seam load is little well, there is the enthusiasm effect to operating efficiency and quality promotion.
Drawings
Fig. 1 is a schematic illustration (longitudinal section) of the butt joint of the pipe body and the pipe joint after the first step.
Fig. 2 is a schematic view (longitudinal section) of the structure of the projection welded end face before the second step is performed.
Fig. 3 is a schematic view (longitudinal section) of the structure of the end face of the female weld before the second step is performed.
In the figure:
1-drill rod pipe body, 2-drill rod joint, 3-convex welding end face, 4-concave welding end face, A-convex outer conical surface, B-convex inner conical surface, C-convex included angle, A1-concave outer conical surface, B1-concave inner conical surface and C1-concave included angle.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model relates to a friction weld welding terminal surface structure of drilling rod body and tool joint to curved surface welding terminal surface replaces plane welding terminal surface, increases the friction weld welding face area of drilling rod body and tool joint.
The utility model provides a friction weld welding terminal surface structure of drilling rod body and tool joint which characterized in that: the drill rod pipe joint comprises a drill rod pipe body 1 and a drill rod joint 2, wherein one friction welding end face of the drill rod pipe body 1 and the drill rod joint 2 is an outer convex welding end face 3 of an outer convex curved surface structure, and the other friction welding end face of the other friction welding end face is an inner concave welding end face 4 of an inner concave curved surface structure which can be in zero-clearance fit with the outer convex welding end face 3.
The utility model discloses an among the preferred embodiment to the required major diameter drilling rod friction weld welding of reaming operation is carried out to directional rig of big moment of torsion welds for the example, and drilling rod body 1 and drill pipe joint 2 weld footpath position external diameter and are 127mm, and the internal diameter is equal 115.8mm, and the wall thickness is 5.6 mm.
Before friction welding, the friction welding end face of one of the drill rod pipe body 1 and the drill rod joint 2 is processed into an outer convex welding end face 3 of an outer convex curved surface structure, the other friction welding end face is processed into an inner concave welding end face 4 of an inner concave curved surface structure matched with the outer convex welding end face 3, and the outer convex welding end face 3 and the inner concave welding end face 4 can be completely in seamless fit after being butted.
The evagination welding terminal surface 3 and the indent welding terminal surface 4 of curved surface structure can be for non-circular cone structure, can both reach the purpose that increases friction welding face area, as long as can be totally zero clearance coincide after evagination welding terminal surface 3 docks with indent welding terminal surface 4, through the friction welding, can both promote welding seam intensity and pull resistance. But preferably, the convex welding end face 3 and the concave welding end face 4 are processed into matched hyperboloid structure ring cone structures, so that the process is simpler and the processing efficiency is higher.
As shown in fig. 1 and 2, in an embodiment, the friction welding end surface of the drill pipe body 1 is processed into an outer convex welding end surface 3 of an outer convex hyperboloid structure, the outer convex welding end surface 3 is an outer convex annular cone structure composed of a convex inner conical surface B and a convex outer conical surface a, an intersection line of the convex inner conical surface B and the convex outer conical surface a is circular, and an included angle between the convex inner conical surface B and the convex outer conical surface a is a convex included angle C; as shown in fig. 1 and 3, the friction welding end face of the drill rod joint 2 is processed into an inward concave welding end face 4 of an inward concave hyperboloid structure matched with the outward convex welding end face 3, the inward concave welding end face 4 is an inward concave annular cone structure consisting of a concave inner conical surface B1 and a concave outer conical surface a1, the intersection line of the concave inner conical surface B1 and the concave outer conical surface a1 is circular, and the included angle between the concave inner conical surface B1 and the concave outer conical surface a1 is a concave included angle C1. Convex included angle C is equal in magnitude to concave included angle C1. Through the steps, the areas of the welding ends of the processed drill pipe body 1 and the drill pipe joint 2 are increased, and the increased convex welding end face 3 and the concave welding end face 4 can be completely in seamless fit after being fully butted, so that the contact area in the friction welding process can be increased.
Preferably, convex included angle C is equal to concave included angle C1 in size and is 60-90 degrees. The larger the included angle, the closer the welded end face is to the plane, and the smaller the weld cross section is increased compared with the plane welding. The smaller the included angle, the larger the welding section, and the larger the axial upsetting force required by the vertical component force of the same welding section. In addition, the smaller the included angle is, the tip part of the convex welding curved surface structure is easy to melt too early, and the welding quality is influenced. The included angle is within the range of 60-90 degrees, the welding section area can be effectively increased, and the convex welding curved surface structure can keep good stability.
Preferably, the male internal taper surface B is equal in area to the male external taper surface A, and the female internal taper surface B1 is equal in area to the female external taper surface A1.
By using the traditional end face welding structure, after the machining is finished, the outer diameter of the welding diameter part of the drill rod joint 2 is 127mm, the inner diameter is 115.8mm, the wall thickness is 5.6mm, and the end face of the welding diameter part is a plane perpendicular to the axis. The outer diameter of the corresponding drill pipe body 1 is 127mm, the inner diameter is 115.8mm, the wall thickness is 5.6mm, and the end face of the pipe body is a plane vertical to the axis. The friction weld face contact area S0 was 2134.7 square millimeters.
Use the utility model discloses a friction welding end face structure, drilling rod joint 2 curved surface welding end face processing accomplish the back, and it welds footpath position external diameter and be 127mm, and the internal diameter is 115.8mm, welds footpath position wall thickness and is 5.6 mm. The end face of the welding diameter is a concave welding end face 4 consisting of an outer conical surface A1 and an inner conical surface B1. The concave included angle C1 is 90 degrees, and the area of the concave inner conical surface B1 is equal to that of the concave outer conical surface A1. The area S1 of the hyperboloid consisting of the concave outer conical surface A1 and the concave inner conical surface B1 is 3356.32 square millimeters. The welding end face structure of the drill pipe body 1 is in an outward convex shape, the structural parameters of the welding end face structure of the welding diameter part of the drill pipe joint 2 are the same, and the outward convex welding end face 3 can be completely in zero clearance fit with the inward concave welding end face 4 after being butted. Data comparison shows that S1: s0=1.57, i.e.: compare with traditional plane welding terminal surface, adopt the utility model discloses make friction weld face of weld area of contact increase 0.57 times.
And (3) carrying out friction welding on the convex welding end face 3 and the concave welding end face 4 by using a continuous friction welding machine, wherein the specific parameters are as follows:
the type of the welding machine is as follows: c630 model continuous friction welder.
Setting welding process parameters: the working pressure is 2.26MPa, the working speed is 2.95mm/s, the friction initial pressure is 2.61MPa, the pre-jacking pressure is 5.65 MPa, the friction pressure is 7.07 MPa, the upsetting pressure is 10 MPa, the friction time is 10s, the upsetting pressure-maintaining time is 6s, and the upsetting deformation is 15 mm.
After friction welding is carried out according to the parameters, the welding surface is well fused, the inner and outer flashes are full, and the actual friction shortening is 15.02 mm.
And detecting the tensile property of the welding seam. The material of the pipe body and the joint for the test is 26CrMo, and the steel grade is G105. The test is according to the standard: ASTM A370-2005. Sample size: 25.7 × 3.83mm, shape of the specimen: strip-shaped test specimens. And (3) testing results: the tensile strength is 1019MPa, and the tensile property is improved by more than 30 percent compared with the tensile property of a plane friction welding end face structure.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a friction weld welding terminal surface structure of drilling rod body and tool joint which characterized in that: the drill rod joint comprises a drill rod pipe body (1) and a drill rod joint (2), wherein the friction welding end face of one of the drill rod pipe body (1) and the drill rod joint (2) is an outer convex welding end face (3) of an outer convex curved surface structure, and the other friction welding end face is an inner concave welding end face (4) of an inner concave curved surface structure which can be in zero-clearance fit with the outer convex welding end face (3).
2. A friction weld end face configuration for drill pipe bodies and drill pipe joints as claimed in claim 1, wherein: the outer convex welding end face (3) is of an outer convex annular cone structure consisting of a convex inner conical surface (B) and a convex outer conical surface (A), the intersection line of the convex inner conical surface (B) and the convex outer conical surface (A) is circular, and the included angle between the convex inner conical surface (B) and the convex outer conical surface (A) is a convex included angle (C); the concave welding end face (4) is of a concave annular cone structure consisting of a concave inner conical surface (B1) and a concave outer conical surface (A1), the intersection line of the concave inner conical surface (B1) and the concave outer conical surface (A1) is circular, and the included angle between the concave inner conical surface (B1) and the concave outer conical surface (A1) is a concave included angle (C1); the convex included angle (C) is equal to the concave included angle (C1).
3. A friction weld end face configuration for drill pipe bodies and drill pipe joints as claimed in claim 2, wherein: the convex included angle (C) and the concave included angle (C1) are both 60-90 degrees.
4. A friction weld end face configuration for drill pipe bodies and drill pipe joints as claimed in claim 3, wherein: the convex inner conical surface (B) and the convex outer conical surface (A) are equal in area, and the concave inner conical surface (B1) and the concave outer conical surface (A1) are equal in area.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021131586.2U CN212398558U (en) | 2020-06-18 | 2020-06-18 | Friction welding end face structure of drill pipe body and drill pipe joint |
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| CN202021131586.2U CN212398558U (en) | 2020-06-18 | 2020-06-18 | Friction welding end face structure of drill pipe body and drill pipe joint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115945861A (en) * | 2023-03-13 | 2023-04-11 | 成都国营锦江机器厂 | Nondestructive repair structure and method for driven bevel gear internal spline abrasion |
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2020
- 2020-06-18 CN CN202021131586.2U patent/CN212398558U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115945861A (en) * | 2023-03-13 | 2023-04-11 | 成都国营锦江机器厂 | Nondestructive repair structure and method for driven bevel gear internal spline abrasion |
| CN115945861B (en) * | 2023-03-13 | 2023-06-09 | 成都国营锦江机器厂 | Nondestructive repair structure and method for abrasion of internal spline of driven bevel gear |
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