CN217343258U - Necking and pushing head, core rod and steel pipe machining device - Google Patents
Necking and pushing head, core rod and steel pipe machining device Download PDFInfo
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- CN217343258U CN217343258U CN202220864373.3U CN202220864373U CN217343258U CN 217343258 U CN217343258 U CN 217343258U CN 202220864373 U CN202220864373 U CN 202220864373U CN 217343258 U CN217343258 U CN 217343258U
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Abstract
The utility model belongs to special steel is equipped with and is made field, in particular to throat cuts somebody's hair, plug and steel tube machining device. The necking push head is used for necking a capillary and comprises a push head body, wherein the push head body is sunken towards the end surface of a core rod towards the direction far away from the core rod to form a concave platform and a push head end surface protruding out of the concave platform; the diameter of the concave table is larger than the outer diameter of the rod head of the core rod matched with the concave table. The mandrel comprises a mandrel body, the mandrel body is arranged in the capillary, and one end of the mandrel body is provided with a mandrel head; the rod head is provided with a cone part which is used for being pushed into a concave table of the necking pushing head, and the head part of the capillary is abutted against the pushing head end face of the necking pushing head. The steel pipe processing device comprises the necking push head, the core rod and a necking die arranged on one side of the necking push head. The utility model discloses can reduce steel pipe crop loss effectively to reach and reduce the steel pipe crop after the production, improve the lumber recovery.
Description
Technical Field
The utility model belongs to special steel equips the manufacturing field, in particular to throat pushes away head, plug and steel tube machining device.
Background
CPE (Cross-roll Piercing and elongation) means Cross-Piercing and extending, the process is developed on the basis of the traditional pipe jacking process, the limitations of small billet weight and low yield of the pipe jacking method are overcome, and the advantages of simple pipe jacking process and low investment are retained. The seamless steel pipe produced by the CPE process adopts a three-step method: perforation, extension and relaxation. The main process flow mainly comprises the following steps: heating a pipe blank, cross piercing, necking, pipe jacking, rod loosening, reheating, diameter fixing and reducing, cooling, end cutting, finishing and warehousing. Although the CPE tube rolling process reduces the end cutting loss after the tube is pushed compared with the original Aohard tube pushing process, the CPE tube rolling process still has the defects of short finished tube length, low metal yield (mainly end cutting loss) and low production capacity compared with other tube rolling processes.
According to the characteristics of the CPE pipe jacking machine set, the height of the finished product rate of the process depends on the size of the cutting loss of the necking cup bottom and the length of the steel pipe; therefore, in order to reduce the length of the cut end and improve the yield, a pipe jacking process using a novel necking push head is needed.
SUMMERY OF THE UTILITY MODEL
The present invention aims at least solving one of the technical problems existing in the prior art or the related art.
In order to achieve the above object, the utility model provides a throat is cut somebody's hair, plug and steel tube machining device, its technical scheme as follows:
a necking pusher is used for necking a capillary and comprises a pusher body, wherein the end surface of the pusher body facing a core rod is sunken towards the direction far away from the core rod to form a concave platform and a pusher end surface protruding out of the concave platform; the diameter of the concave table is larger than the outer diameter of the rod head of the core rod matched with the concave table.
The necking pusher as described above is more preferably: the height of the end face of the push head protruding out of the concave table is 10mm to 30 mm.
The necking pusher as described above is more preferably: the cross section of the end face of the push head is annular, and the end face of the push head surrounds the concave table.
The necking pusher as described above is more preferably: the axis of the end face of the push head is superposed with the axis of the core rod, and the outer diameter of the end face of the push head is larger than or equal to that of the capillary.
The necking pusher as described above is more preferably: the inner diameter of the end face of the push head is smaller than or equal to that of the capillary, and the inner diameter of the end face of the push head is larger than that of the rod head of the mandrel.
The necking pusher as described above is more preferably: the intersection of the end surface of the push head and the side wall of the concave table is a sharp angle.
The necking pusher as described above is more preferably: the side wall of the concave platform and the bottom wall of the concave platform are in smooth transition at the intersection.
A mandrel comprises a bar body and a hollow billet, wherein the bar body is used for being matched with a necking pushing head to perform necking on the hollow billet, the bar body is used for being arranged in the hollow billet, and one end of the bar body is provided with a bar head; the rod head is provided with a cone part which is used for being pushed into the concave platform of the necking pushing head, and the head part of the capillary is abutted against the pushing head end surface of the necking pushing head.
The above-described mandrel bar is more preferably: the diameter of the club head is smaller than that of the club body, and a transition part with a conical surface is formed between the club head and the club body.
The above-described mandrel bar is more preferably: the length of the cone of the mandrel along the axial direction of the mandrel is 25mm to 35 mm.
The above-described mandrel bar is more preferably: the length of the taper is greater than the depth of the recess.
A steel tube processing device comprises the necking pushing head; the core rod; the necking die is arranged on one side of the necking pushing head and is used for extruding the outer wall of the capillary; the necking pushing head, the core rod and the necking die are matched to perform necking on the capillary.
The embodiment of the utility model provides a beneficial effect that technical scheme brought is: the utility model provides a throat cuts somebody's turn to do and compares with former throat and pushes somebody's turn to do, and the somebody's turn to do changes the spill by the plane, reduces the throat length about the steel pipe 30mm behind the push pipe throat, and the throat behind the push pipe must be amputated to realize reducing back steel pipe crop length and reduce, improve steel pipe lumber recovery. The utility model discloses a can reduce steel pipe crop loss effectively to reach and reduce the steel pipe crop after the production, improve the lumber recovery.
Drawings
Fig. 1 shows a schematic structural view of a necking pusher of an embodiment of the present invention;
fig. 2 shows a schematic structural diagram of a necking pusher according to an embodiment of the present invention.
The symbols in the figures are as follows:
1, a pusher body, 12 concave tables, 14, a pusher end surface, 2 mandrel rods, 22 club heads, 24 cone parts, 26 club bodies, 28 transition parts, 3 necking dies and 4 capillary tubes.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention and its advantages will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 1, an embodiment of the present invention provides a necking bit 1 for necking a tubular billet.
The necking push head comprises a push head body 1, wherein the end surface of the push head body 1 facing the core rod 2 is sunken towards the direction far away from the core rod 2 to form a concave platform 12 and a push head end surface 14 protruding out of the concave platform 12; specifically, the mandrel 2 is arranged in the capillary 4, the rod head 22 of the mandrel 2 faces the pusher body 1, the rod head 22 of the mandrel 2 is further provided with a cone 24, when the capillary 4 is necked down, the cone 24 of the mandrel 2 is pushed into the concave table 12, and one end of the capillary 4 facing the pusher body 1 abuts against the pusher end face 14, so that the cone 24 of the mandrel 2 extends out of the capillary 4.
As shown in FIG. 1, the mandrel 2 comprises a rod 26 for necking the hollow billet in cooperation with a necking head. Specifically, the rod 26 is arranged in the capillary 4, and one end of the rod 26 is provided with the rod head 22; the club head is provided with a conical part 24 which is used for pushing into the concave table 12 of the pushing head body 1 and making the club head 22 of the capillary 4 abut against the pushing head end surface 14 of the pushing head body 1.
As shown in fig. 1, the diameter of the rod head 22 is smaller than that of the rod body 26, and a transition portion 28 having a tapered surface is formed between the rod head 22 and the rod body 26, so that the transition portion 28 prevents the relative movement of the capillary 4 and the mandrel 2 in the axial direction of the mandrel 2 after the completion of the necking of the capillary 4.
Further, as shown in fig. 1, the height of the projection of the pusher end face 14 out of the recess land 12 (or described as the depth of recess land 12 recess) is less than the length of the tapered portion 24 of the mandrel 2 in the axial direction of the mandrel 2, so that when the tapered portion 24 of the mandrel 2 abuts against the recess land 12 and the capillary 4 abuts against the pusher end face 14, the tapered portion 24 of the mandrel 2 may partially project out of the capillary 4 to reduce the length of the necking.
Specifically, the height of the protruding concave stage 12 of the pusher end face 14 is 10mm to 30mm, and may be, for example, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30 mm. The length of the tapered portion 24 of the mandrel 2 in the axial direction of the mandrel is 25mm to 35mm, and may be, for example, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 31mm, 32mm, 33mm, 34mm, or 35 mm. When the height of the push head end surface 14 protruding the concave stage 12 (the depth of the concave stage 12) is taken, the numerical value is required to be smaller than the length of the cone part 24, and as a best scheme, the depth of the concave stage 12 is 20mm, the length of the cone part 24 is 30mm, and the difference between the two is 10 mm.
Further, as shown in fig. 2, the cross section of the pushing end face 14 is annular, and the pushing end face 14 is disposed around the concave table 12, so that the tapered portion 24 of the core rod 2 extends into the concave table 12, one end of the capillary 4 facing the pushing end face 14 can be completely abutted against the pushing end face 14, the axis of the pushing end face 14 is overlapped with the axis of the core rod 2, and the outer diameter of the pushing end face 14 is greater than or equal to the outer diameter of the capillary 4, so that when the capillary 4 is shrunk, the end of the capillary 4 is flatter under the extrusion of the pushing end face 14, the core rod 2 and the necking die 3, and the end of the capillary 4 wraps the rod head 22 of the core rod 2 better, so that the core rod 2 is not pushed through or slipped off during the process of pushing.
Further, as shown in fig. 1, the inner diameter of the pusher end face 14 is smaller than or equal to the inner diameter of the capillary 4, and the inner diameter of the pusher end face 14 is larger than the diameter of the rod head 22 of the mandrel 2, so that when the capillary 4 is necked down, the inner wall surface of the pusher end face 14 is better attached to the outer wall surface of the rod head 22 of the mandrel 2, and the metal on part of the capillary 4 is prevented from entering a gap between the pusher end face 14 and the mandrel 2 under deformation under the extrusion of the pusher end face 14, the mandrel 2 and the necking die 3, so as to increase the length of the necking.
Further, as shown in fig. 2, the intersection of the end surface 14 of the pushing head and the side wall of the concave station 12 is sharp, so that the core rod 2 can conveniently penetrate out of the hollow billet 4. The side wall of the concave table 12 and the bottom wall of the concave table 12 are in smooth transition at the intersection, so that stress concentration can be avoided, and the necking precision of the capillary 4 is improved.
As shown in fig. 1, another embodiment of the present invention provides a steel pipe processing device, which comprises a necking head, a mandrel 2 and a necking die 3, wherein the necking die 3 is disposed on one side of the necking head, and the capillary 4 is necked through the cooperation of the necking head, the mandrel 2 and the necking die 3.
The utility model has the advantages as follows: the utility model provides a throat cuts somebody's turn to do and compares with former throat and pushes somebody's turn to do, and the somebody's turn to do changes the spill by the plane, reduces steel pipe 30 mm's throat length behind the push pipe throat, and the throat behind the push pipe must be amputated to realize reducing back steel pipe crop length and reduce, improve steel pipe lumber recovery. The utility model discloses a can reduce steel pipe crop loss effectively to reach and reduce the steel pipe crop after the production, improve the lumber recovery.
In the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A necking pusher for necking a capillary, comprising:
the end face of the push head body facing the core rod is recessed towards the direction far away from the core rod to form a concave table and a push head end face protruding out of the concave table;
the diameter of the concave table is larger than the outer diameter of the rod head of the core rod matched with the concave table.
2. The necking pusher of claim 1, wherein:
the height of the end face of the push head protruding out of the concave table is 10mm to 30 mm.
3. The necking pusher of claim 1, wherein:
the cross section of the end face of the push head is annular, and the end face of the push head surrounds the concave table.
4. The necking pusher of claim 3, wherein:
the axis of the end face of the push head is superposed with the axis of the core rod, and the outer diameter of the end face of the push head is larger than or equal to that of the capillary;
the inner diameter of the end face of the push head is smaller than or equal to that of the capillary, and the inner diameter of the end face of the push head is larger than that of the rod head of the mandrel.
5. The necking pusher of claim 1, wherein:
the intersection of the end surface of the push head and the side wall of the concave table is a sharp angle.
6. The necking pusher of claim 1, wherein:
the side wall of the concave platform and the bottom wall of the concave platform are in smooth transition at the intersection.
7. The utility model provides a mandrel, includes the barred body for with throat pushing head cooperation to the hollow billet throat, its characterized in that:
the rod body is arranged in the capillary tube, and one end of the rod body is provided with a rod head;
the rod head is provided with a cone part which is used for being pushed into the concave platform of the necking pushing head, and the head part of the capillary is abutted against the pushing head end surface of the necking pushing head.
8. The mandrel of claim 7, wherein:
the diameter of the club head is smaller than that of the club body, and a transition part with a conical surface is formed between the club head and the club body.
9. The mandrel of claim 7, wherein:
the length of the cone part of the mandrel along the axial direction of the mandrel is 25mm to 35 mm;
the length of the taper is greater than the depth of the recess.
10. A steel pipe machining apparatus, comprising:
the necking head of any one of claims 1 to 6;
the mandrel of any one of claims 7 to 9; and
the necking die is arranged on one side of the necking pushing head and is used for extruding the outer wall of the capillary;
the necking pushing head, the core rod and the necking die are matched to perform necking on the capillary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220864373.3U CN217343258U (en) | 2022-04-13 | 2022-04-13 | Necking and pushing head, core rod and steel pipe machining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220864373.3U CN217343258U (en) | 2022-04-13 | 2022-04-13 | Necking and pushing head, core rod and steel pipe machining device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217343258U true CN217343258U (en) | 2022-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220864373.3U Active CN217343258U (en) | 2022-04-13 | 2022-04-13 | Necking and pushing head, core rod and steel pipe machining device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217343258U (en) |
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- 2022-04-13 CN CN202220864373.3U patent/CN217343258U/en active Active
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