CN107891113B - Welding-free triangular arc rib integrated drill rod clamping device and processing method thereof - Google Patents
Welding-free triangular arc rib integrated drill rod clamping device and processing method thereof Download PDFInfo
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- CN107891113B CN107891113B CN201711366907.XA CN201711366907A CN107891113B CN 107891113 B CN107891113 B CN 107891113B CN 201711366907 A CN201711366907 A CN 201711366907A CN 107891113 B CN107891113 B CN 107891113B
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- 230000008569 process Effects 0.000 claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims description 33
- 239000011324 bead Substances 0.000 claims description 27
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
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- 238000005493 welding type Methods 0.000 abstract description 2
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- 238000000465 moulding Methods 0.000 description 15
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
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Abstract
The invention provides a welding-free triangular arc convex rib integrated drill rod clamping device and a processing method thereof, wherein three groups of clamping cylinders are uniformly distributed in the whole 360-degree range of the circumference of the outer side of a half body of each clamping block, so that clamping in the process of extruding a drill rod, installation before extruding the drill rod and taking out after extruding are realized; the two ends of the triangular arc convex rib rod body are partially upsetted through a split outer die extrusion process, and the inner and outer threaded joints of the drill rod are respectively processed at the two ends of the upsetted rod body, so that the drill rod body and the drill rod joint form an integral structure without welding connection; the invention realizes the processing and manufacturing of the triangular arc rib integrated drill rod, and greatly improves the overall strength and the torsion resistance of the triangular arc rib drill rod; meanwhile, the quality defect that the plug-in type triangular arc rib drill rod and the friction welding type triangular arc rib drill rod adopt manual arc welding or friction welding is avoided, and the progress of the triangular arc rib processing technology and the development of tunnel drilling industry in China are promoted.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a welding-free triangular arc bead integrated drill rod clamping device and a machining method thereof.
Background
At present, the domestic triangular arc bead drill rod has the characteristics of strong gas emission assisting capability, small rotation resistance, high drilling speed and the like, and is widely used in various domestic large mining areas. The section of the triangular arc rib drill rod body is in a triangular pipe ring shape, the joint is a pipe thread with taper, the drill rod structure is special, the conventional triangular arc rib drill rod is generally in a plug-in type structure, namely, joints at two ends are processed into steps, the big head end of each step is consistent with the triangular shape of the drill rod body, the small head end of each step is consistent with the triangular shape in the drill rod body, the small head end of each step is inserted into the triangular shape in the drill rod body, three grooves are processed on the outer side of the triangular arc rib rod body, fillet weld is formed by manual arc welding of the joints at two ends, plug-in type welding is realized (figure 12), and the production efficiency is greatly improved due to the fact that the triangular arc rib drill rod is formed by improving the process technology (figure 13). However, the defects of friction welding also plagues the development of the manufacturing industry of the triangular arc bead rod body at all times. For a long time, the technicians continuously struggle from the structure and the process method of the drill rod, and a great deal of heart blood is spent on realizing the integrated drill rod without welding triangular arc ribs, but the manufacturing process method has no better breakthrough, and needs to be improved.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a welding-free triangular arc rib integrated drill rod clamping device and a processing method thereof, so that the processing and manufacturing of the triangular arc rib integrated drill rod are realized, the design is reasonable, and the structure is compact.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
The welding-free triangular arc rib integrated drill rod clamping device comprises a base, a rod body clamping mechanism and an extrusion forming mechanism, wherein the rod body clamping mechanism is of three half-body combined structures, and the half-body combined structures are tightly attached and clamped on the circumferential outer side surface of a tubular rod body with a triangular arc rib cross section through a driving piece, so that uniform clamping and pressing force is formed; the extrusion forming mechanism is arranged opposite to the end face of the rod body, and the second driving part drives the forming internal mold to move along the length direction of the rod body, so that the partial upsetting of the end part of the rod body is realized; the rod body clamping mechanism and the extrusion forming mechanism are both arranged on the machine base.
Further, the extrusion forming mechanism comprises a second driving piece and a forming internal mold; the second driving part comprises a horizontal hydraulic cylinder, a connecting seat and a guide seat; one end of the horizontal hydraulic cylinder is connected with the supporting plate of the machine base, and the other end of the horizontal hydraulic cylinder is connected with one end of the forming internal mold through a connecting seat; the forming internal mold is arranged on the guide seat in a penetrating way and moves horizontally along the axial direction of the guide channel on the guide seat.
Further, the front end of the forming internal mold is sequentially provided with a conical forming head, a triangular arc convex rib boss and a connecting part from front to back; the conical forming head stretches into the rod body of the extrusion drill rod to guide and form a conical through hole required by the drill rod joint in the extrusion process; the outer dimension of the triangular arc convex rib boss is consistent with the outer dimension of the end face of the rod body and the section dimension of the cavity of the forming outer die, so that the forming inner die moves in the rod body placing cavity formed by the half body combined structure, and meanwhile, the abutting connection of the end part of the rod body is realized; the connecting part axially penetrates through the guide seat and extends outwards to be connected with the connecting seat, so that the axial horizontal movement of the forming internal mold is realized.
Further, the half body combined structure comprises a first driving piece, a guide shaft, a clamping block half body and an outer mold half body; the first driving piece is a clamping oil cylinder; one end of the clamping oil cylinder is connected with the supporting frame of the stand, the other end of the clamping oil cylinder is connected with the guide shaft, and the clamping block half body and the outer mold half body are driven to move along the direction vertical to the side surface of the rod body through the guide shaft, so that the outer mold half body clamps the circumferential outer side surface of the rod body; the clamping block half body is fixedly arranged on the outer side face of the outer die half body through bolts.
Further, the inner side edges of the two ends of the outer mold half body are also provided with chamfer faces.
Further, the outer mold half body is provided with a limit groove C of the clamping block half body.
The processing method of the welding triangle arc bead-based integrated drill rod clamping device sequentially comprises the following steps of:
A. After the preparation work is finished, pushing the outer mold half body inwards by the half body combined structure through the first driving part to form a placing cavity of the rod body preliminarily, so that a circumferential outer side surface supporting initial positioning state of the rod body is formed;
B. Circumferential positioning and clamping: the rod body is placed in the placing cavity along the axial direction of the rod body, the driving piece is respectively driven to push the outer mold half body inwards, the peripheral outer side surface of the outer mold half body is tightly attached to the middle part of the clamping rod body, and the end part of the rod body is opposite to the forming inner mold;
C. Positioning the end part of the rod body: the conical forming head of the forming internal mold extends into the extrusion rod body and is correspondingly arranged with the shape of the end face of the rod body through the triangular arc convex rib boss;
D. Upsetting one end of the rod body: under the drive of a horizontal hydraulic cylinder, extruding a rod body arranged in a rod body clamping mechanism through the H surface of a forming internal mold so as to realize upsetting of the end part of the rod body;
E. The other end of the rod body is upset: after upsetting one end of the rod body, taking out the rod body, turning the rod body around, extruding the other end of the rod body again, and then axially initially positioning and circumferentially positioning and clamping the rod body to finish upsetting of the two ends of the drill rod;
H. After upsetting is carried out on the two ends of the rod body respectively, the rod body is taken out, the inner threaded joint and the outer threaded joint of the drill rod are respectively processed on the two ends of the upsetting rod body, and finally, an integrated structure without welding connection is formed, so that the torsion resistance of the drill rod is enhanced.
Compared with the prior art, the invention has the beneficial effects that:
1. The invention uses triangle tube section bar to adopt special mould hydraulic clamping device, three clamping block halves are distributed on the outer sides of three molding outer mould halves, and are connected by bolts. Three groups of clamping cylinders are uniformly distributed in the whole 360-degree range of the circumference outside the three clamping block halves, and the clamping cylinders are connected with the three clamping block halves through guide shafts and serve as power sources of the mold clamping device; the clamping block is driven to be closed and opened under the action of the clamping oil cylinder, and the movement of the clamping block half body drives the movement of the three molding outer mold half bodies; the hydraulic clamping mechanism has the advantages of stable action, strong synchronism, good clamping effect and high efficiency, and realizes the automation of the opening and closing of the die.
2. The three clamping block halves and the outer mold half are connected through the bolts, and the movement of the clamping block halves drives the movement of the three molding outer mold halves to realize clamping in the extrusion process of the drill rod, so that the outer mold is convenient to replace, and the outer molds with consistent external dimensions and different cavity dimensions can be realized.
3. The clamping force of the three groups of clamping cylinders is uniform in the 360-degree range of the circumference of the clamping block of the hydraulic clamping device, and the hydraulic clamping device is high in applicability, and is suitable for clamping a triangular arc rib drill rod and a smooth round drill rod.
4. The inner die is connected with the hydraulic cylinders which are horizontally arranged, the inner die is driven to displace through the horizontal extrusion cylinder after the rod body is clamped, the processing of the triangular arc bead integrated drill rod is completed under the action of the inner die and the outer die, the inner die replacement speed is high, and the extrusion processing of the triangular arc bead integrated drill rod and the smooth surface integrated round drill rod with different specifications and shapes is realized.
5. The invention improves the manufacturability of the production of the product, has simple operation and no need of skilled grasp, can realize the mechanized production of the triangle circular arc bead integrated drill rod and the smooth surface integrated drill rod by changing the cavity structure and the outer mold structure of the outer mold, and has good product reproducibility, high production efficiency and low manufacturing cost.
6. The invention provides a practical, economical and reliable manufacturing process, realizes the processing and manufacturing of the triangular arc bead integrated drill rod, greatly improves the integral strength and torsion resistance of the triangular arc bead drill rod due to the integral structure of the drill rod body and the joint, simultaneously avoids the quality defect that the inserted triangular arc bead drill rod and the friction welding type triangular arc bead drill rod adopt manual arc welding or friction welding, and promotes the progress of the triangular arc bead processing technology and the development of tunnel drilling industry in China.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a processing apparatus according to the present invention;
FIG. 2 is a cross-sectional view of the processing apparatus A-A of FIG. 1 in accordance with the present invention;
FIG. 3 is a cross-sectional view of the processing apparatus B-B of FIG. 1 in accordance with the present invention;
FIG. 4 is a schematic view of the structure of the rod body of the present invention after being clamped in a molding outer mold;
FIG. 5 is a side view of the rod body of the present invention after being placed into a forming outer mold for clamping;
FIG. 6 is a schematic diagram of the structure of the triangular arc bead integrated drill pipe without inner chamfer of the outer mold half assembly of the invention;
FIG. 7 is a side view of the triangular arc bead integrated drill pipe without the inner chamfer of the outer mold half assembly of the present invention;
FIG. 8 is a schematic view of the structure of the triangular arc bead integrated drill pipe with the inner chamfer added by the outer mold half assembly of the invention;
FIG. 9 is a side view of the triangular arc bead integrated drill pipe of the outer mold half assembly of the present invention with the addition of an inner chamfer;
FIG. 10 is a schematic view of the molding inner mold structure of the present invention;
FIG. 11 is a sectional view of a side molding inner die D-D according to the present invention;
FIG. 12 is a schematic view of a prior art plug-in drill rod;
FIG. 13 is a schematic view of a prior art friction drill rod;
FIG. 14 is a schematic view of a workpiece blank extruded using the present invention;
FIG. 15 is a schematic view of the final product structure after processing using the present invention;
The reference numerals in the figures illustrate:
1. A base; 11. a support plate; 12. a support frame; 13. a cross brace; 2. a rod body clamping mechanism; 21. a half-body combined structure; 211. a first driving member; 212. a guide shaft; 213. a clamp block half; 214. an outer mold half; 3. an extrusion forming mechanism; 31. a second driving piece; 311. a horizontal hydraulic cylinder; 312. a connecting seat; 313. a guide seat; 32. forming an inner mold; 321. a conical forming head; 322. triangular arc convex rib boss; 323. a connection part; 4. a rod body; 5. and (5) a bolt.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The present invention is further described with reference to fig. 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11, 14 and 15:
Referring to fig. 1,2 and 3, a welding-free triangular arc bead integrated drill rod clamping device comprises a base 1, a rod body clamping mechanism 2 and an extrusion forming mechanism 3, wherein the rod body clamping mechanism 2 is a three-half-body combined structure 21, and the half-body combined structure 21 is used for tightly attaching and clamping the circumferential outer side surface of a tubular rod body 4 with a triangular arc bead cross section through a first driving part 211 respectively, so that uniform clamping and pressing force is formed; the extrusion forming mechanism 3 is arranged opposite to the end face of the rod body 4, and drives the forming internal mold 32 to move along the length direction of the rod body 4 through the second driving part 31, so that the partial upsetting of the end part of the rod body 4 is realized; the rod body clamping mechanism 2 and the extrusion forming mechanism 3 are both arranged on the machine base 1.
The extrusion forming mechanism 3 comprises a second driving piece 31 and a forming internal mold 32; the second driving piece 31 comprises a horizontal hydraulic cylinder 311, a connecting seat 312 and a guide seat 313; one end of the horizontal hydraulic cylinder 311 is connected with the supporting plate 11 of the stand 1, and the other end is connected with one end of the molding inner die 32 through a connecting seat 312; the forming inner mold 32 is inserted through the guide seat 313 and moves horizontally along the guide channel on the guide seat 313.
The half-body combined structure 21 comprises a first driving piece 211, a guide shaft 212, a clamping block half body 213 and an outer mold half body 214; the first driving piece 211 is a clamping oil cylinder; one end of the clamping cylinder is connected with the supporting frame 12 of the stand 1, the other end of the clamping cylinder is connected with the guide shaft 212, and the clamping block half body 213 and the outer mold half body 214 are driven to move along the direction vertical to the side surface of the rod body 4 by the guide shaft 212, so that the outer mold half body 214 clamps the circumferential outer side surface of the rod body 4; the clamping block half body 213 is fixedly arranged on the outer side face of the outer mold half body 214 through bolts 5. The movement of the clamping block half body 213 drives the movement of the three half bodies of the molding outer die to realize clamping in the extrusion process of the drill rod, so that the outer die is convenient to replace, and the outer dies with consistent outer dimensions and different cavity dimensions can be used.
Three support frames 12 are provided on the machine base 1, the first driving member 211 is provided in the support frame 12, and the guide shaft 212 is provided on the support frame 12 in a penetrating manner and moves back and forth in the passage of the support frame 12.
The support plate 11 is disposed opposite to the support frame 12; and a cross brace 13 is further arranged between the supporting plate 11 and the supporting frame 12, and two ends of the cross brace 13 are respectively fixedly connected with the supporting plate 11 and the supporting frame 12, so that the stability of the whole mechanism during upsetting is enhanced.
Referring to fig. 10, 11, 14 and 15, the front end of the molding inner mold 32 is provided with a conical molding head 321, a triangular arc bead boss 322 and a connecting portion 323 from front to back in sequence; extending into the extrusion rod body 4 through the conical forming head 321 for guiding and forming a conical through hole required by the drill rod joint in the extrusion process; the outer dimension of the end face of the rod body 4 and the section dimension of the cavity of the forming outer mold are consistent through the triangular arc convex rib boss 322, so that the forming inner mold 32 moves in the rod body 4 placing cavity formed by the half body combined structure 21, and meanwhile, the abutting connection of the end part of the rod body 4 is realized; the connecting part 323 axially passes through the guide seat 313 and extends outwards to be connected with the connecting seat 312, so that the forming internal mold 32 axially moves horizontally; therefore, the two ends of the rod body 4 are extruded into a triangle in the inner and outer shapes of the specified length, and the inner hole is extruded into an integrated drill rod blank with a through hole with a certain taper. The forming internal mold 32 needed by extrusion at two ends of the drill rod is connected with a horizontal hydraulic cylinder 311 which is horizontally arranged, the forming internal mold 32 is driven to displace by the horizontal hydraulic cylinder 311 after the drill rod is clamped, two ends of a circular arc convex rib rod body 4 of the ring surface of the triangular pipe are respectively extruded into a triangle in the inside and outside of a specified length, and an inner hole is extruded into a through hole with a certain taper. The two ends of the triangular arc convex rib rod body 4 are partially upsetted through a split outer die extrusion process, and the inner and outer threaded joints of the drill rod are respectively processed at the two ends of the upsetted rod body 4, so that the rod body 4 and the drill rod joint form an integral structure without welding connection, and the torsion resistance of the drill rod is enhanced.
The axial direction of the outer side wall of the connecting part 323 is also provided with a strip-shaped limiting groove G, and the fixed limiting block matched with the strip-shaped limiting groove G is arranged on the guide seat 313 and can move along the axial strip-shaped limiting groove G, so that when the connecting part 323 axially moves, the side edge of the fixed limiting block is limited, the axial rotation of the connecting part 323 is avoided, and the subsequent effective positioning processing is facilitated.
Referring to fig. 4, 5, 6, 7, 8 and 9, the inner sides of the two ends of the outer mold half 214 are further provided with chamfer surfaces; the outer mold half 214 is provided with a limit groove C of the clamping block half 213. In order to facilitate smooth placement of the extruded rod body 4 into the triangular cavity of the rod body clamping mechanism 2 and the guiding outer die of the forming inner die 32, two ends of the triangular cavity of the rod body clamping mechanism 2 are respectively processed with chamfers of 60 degrees, when the rod body clamping mechanism 2 is assembled, the left end and the right end of the forming outer die are provided with steps, and the step surface C is contacted with the section of the clamping block after the three halves are assembled, so that the horizontal movement of the outer die in the process of extruding a drill rod is prevented.
The processing method of the welding-free triangle arc bead integrated drill rod sequentially comprises the following steps:
A. After the preparation work is finished, pushing the outer mold half body 214 inwards by the half body combined structure 21 through the first driving part 211 to initially form a placing cavity of the rod body 4, so that a circumferential outer side surface supporting initial positioning state of the rod body 4 is formed;
B. Circumferential positioning and clamping: the rod body 4 is placed in the placing cavity along the axial direction of the rod body, the first driving part 211 is respectively driven to push the outer mold half body 214 inwards, the outer side surface of the outer mold half body 214 in the circumferential direction is tightly attached to and clamped with the middle part of the rod body 4, and the end part of the rod body 4 is opposite to the forming inner mold 32;
C. Positioning the end part of the rod body: the conical forming head 321 of the forming internal mold 32 extends into the extrusion rod body 4 and is correspondingly arranged with the shape of the end surface of the rod body 4 through the triangular arc convex rib boss 322;
D. Upsetting one end of the rod body: under the drive of the horizontal hydraulic cylinder 311, the rod body 4 arranged in the rod body clamping mechanism 2 is extruded by the surface of the forming internal mold 32H, so as to realize upsetting of the end part of the rod body 4;
E. The other end of the rod body is upset: after upsetting one end of the rod body 4, taking out the rod body 4, turning around the rod body 4, extruding the other end again, and then axially initially positioning and circumferentially positioning and clamping the rod body 4 to finish upsetting of two ends of the drill rod;
H. After upsetting is carried out on the two ends of the rod body 4 respectively, the rod body 4 is taken out, the two ends of the upsetting rod body 4 are respectively provided with an inner threaded joint and an outer threaded joint of the drill rod, and finally, an integrated structure without welding connection is formed, so that the torsion resistance of the drill rod is enhanced.
Preferably, the clamping block halves 213 and the triangular arc rib drill rod molding outer mold halves 214 are respectively formed into three halves by linear cutting after rough machining, the three halves are integrated at recombination points and are divided into three halves again after being molded again, so that the three halves are gapless when the rod body clamping mechanism 2 is used for clamping the die, the die cavity forms a smooth triangular cylindrical surface, the die cavity is consistent with the shape of the triangular arc rib rod body 4, the surfaces of the two ends of the extruded drill rod are smooth and flat, no steps and burrs exist, and the appearance quality of the drill rod is ensured; the triangular rib rod body is made of R780, 36Mn2v, 40Cr, 27SiMn or D40, D50 and D60.
When the clamping device is used, three groups of clamping oil cylinder clamping oil cylinders are uniformly distributed in the whole 360-degree range of the circumference outside the three clamping block half bodies 213 and are connected with the three clamping block half bodies 213 through the guide shafts 212, the clamping oil cylinders are used as power sources of a die clamping device, and the guide shafts 212 are used as guide devices of the clamping oil cylinders. The clamping block half body 213 is driven to be closed and opened under the action of the clamping oil cylinder, the clamping block half body 213 moves to drive the three molding outer mold half bodies 214 to move, when the piston rod of the clamping oil cylinder stretches out, the clamping block half body 213 moves to drive the mold closing of the three molding outer mold half bodies 214 to form a mold cavity, the rod body 4 to be extruded is clamped, when the piston rod of the clamping oil cylinder stretches back, the clamping block half body 213 moves to drive the three molding outer mold half bodies 214 to be separated, and at the moment, the extrusion rod body 4 and the rod body 4 after extrusion can be placed and taken out. The invention adopts a special die hydraulic clamping device by utilizing a triangular pipe body profile, the clamping blocks and the forming outer die are of a three-half structure, and three clamping block halves 213 of the die hydraulic clamping device are distributed on the outer sides of three forming outer die halves 214 and are connected through bolts 5. Three groups of clamping cylinders are uniformly distributed in the whole 360-degree range of the circumference outside the three clamping block half bodies 213, and are connected with the three clamping block half bodies 213 through guide shafts 212 and serve as power sources of the die clamping device. The clamping blocks are driven to be closed and opened under the action of the clamping oil cylinders, and the movement of the clamping block half bodies 213 drives the movement of the three molding outer mold half bodies 214. The hydraulic clamping mechanism has the advantages of stable action, strong synchronism, good clamping effect and high efficiency, and realizes the automation of the opening and closing of the die. The invention improves the manufacturability of the production of the product, has simple operation and no need of skilled grasp, can realize the mechanized production of the triangle circular arc bead integrated drill rod and the smooth surface integrated drill rod by changing the cavity structure and the outer mold structure of the outer mold, has good product reproducibility, high production efficiency and low manufacturing cost.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (5)
1. The welding-free triangular arc bead integrated drill rod clamping device is characterized by comprising a base (1), a rod body clamping mechanism (2) and an extrusion forming mechanism (3), wherein the rod body clamping mechanism (2) is of three half-body combined structures (21), and the half-body combined structures (21) are tightly attached and clamped on the circumferential outer side surface of a tubular rod body (4) with a triangular arc bead cross section through a first driving part (211) respectively, so that uniform clamping and pressing force is formed; the extrusion forming mechanism (3) is arranged opposite to the end face of the rod body (4), and the second driving part (31) drives the forming internal mold (32) to move along the length direction of the rod body (4), so that the partial upsetting of the end part of the rod body (4) is realized; the rod body clamping mechanism (2) and the extrusion forming mechanism (3) are arranged on the machine base (1);
The extrusion forming mechanism (3) comprises a driving piece II (31) and a forming internal mold (32); the second driving part (31) comprises a horizontal hydraulic cylinder (311), a connecting seat (312) and a guide seat (313); one end of the horizontal hydraulic cylinder (311) is connected with the supporting plate (11) of the base (1), and the other end of the horizontal hydraulic cylinder is connected with one end of the forming internal mold (32) through a connecting seat (312); the forming internal mold (32) is arranged on the guide seat (313) in a penetrating way and moves horizontally along the axial direction of a guide channel on the guide seat (313);
the half-body combined structure (21) comprises a first driving piece (211), a guide shaft (212), a clamping block half body (213) and an outer mold half body (214); the first driving piece (211) is a clamping oil cylinder; one end of the clamping oil cylinder is connected with the supporting frame (12) of the base (1), the other end of the clamping oil cylinder is connected with the guide shaft (212), and the clamping block half body (213) and the outer die half body (214) are driven to move along the side surface direction of the vertical rod body (4) through the guide shaft (212), so that the outer die half body (214) clamps the circumferential outer side surface of the rod body (4); the clamping block half body (213) is fixedly arranged on the outer side face of the outer mold half body (214) through bolts (5).
2. The welding triangular circular arc bead integrated drill rod clamping device according to claim 1, wherein the front end of the forming internal mold (32) is sequentially provided with a conical forming head (321), a triangular circular arc bead boss (322) and a connecting part (323) from front to back; the conical forming head (321) stretches into the extrusion rod body (4) to guide and form a conical through hole required by the drill rod joint in the extrusion process; the outer dimension of the end face of the rod body (4) and the section dimension of the cavity of the forming outer die are consistent through the triangular arc convex rib boss (322), so that the forming inner die (32) moves in the rod body (4) placing cavity formed by the half body combined structure (21), and meanwhile, the end part of the rod body (4) is abutted; the connecting part (323) axially penetrates through the guide seat (313) and extends outwards to be connected with the connecting seat (312), so that the forming inner die (32) axially moves horizontally.
3. The welded triangular-arc-bead integrated pipe clamping device according to claim 1, wherein the inner sides of the two ends of the outer mold half (214) are further provided with chamfer surfaces.
4. The welding triangle circular arc bead integrated drill rod clamping device according to claim 1, wherein the outer mold half body (214) is provided with a limit groove C of the clamping block half body (213).
5. The processing method of the integrated drill rod clamping device based on the welding triangle circular arc convex edge is characterized by comprising the following steps in sequence:
A. After the preparation work is finished, pushing the outer mold half body (214) to initially form a placing cavity of the rod body (4) inwards by the half body combined structure (21) through the first driving part (211), so that a circumferential outer side surface of the rod body (4) is in a supporting initial positioning state;
B. Circumferential positioning and clamping: the rod body (4) is placed in the placing cavity along the axial direction of the rod body, the first driving part (211) is respectively driven to push the outer mold half body (214) inwards, the peripheral outer side surface of the outer mold half body (214) is tightly attached to the middle part of the clamping rod body (4), and the end part of the rod body (4) is opposite to the forming inner mold (32);
C. positioning the end part of the rod body: the conical forming head (321) of the forming internal mold (32) stretches into the extrusion rod body (4) and is correspondingly arranged with the shape of the end face of the rod body (4) through the triangular arc convex rib boss (322);
D. Upsetting one end of the rod body: under the drive of a horizontal hydraulic cylinder (311), a rod body (4) arranged in the rod body clamping mechanism (2) is extruded through the H surface of a forming internal mold (32), so as to realize upsetting of the end part of the rod body (4);
E. The other end of the rod body is upset: after upsetting one end of the rod body (4), taking out the rod body (4), turning around the rod body (4), extruding the other end again, and then axially initially positioning and circumferentially positioning and clamping the rod body (4) to finish upsetting of two ends of the drill rod;
H. After upsetting is respectively carried out at the two ends of the rod body (4), the rod body (4) is taken out, the inner threaded joint and the outer threaded joint of the drill rod are respectively processed at the two ends of the upsetting rod body (4), and finally, an integrated structure without welding connection is formed, and the torsion resistance of the drill rod is enhanced.
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| CN201711366907.XA CN107891113B (en) | 2017-12-18 | 2017-12-18 | Welding-free triangular arc rib integrated drill rod clamping device and processing method thereof |
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