CN218743986U - Straight groove internal mold structure for seamless steel pipe cold-drawing machine - Google Patents
Straight groove internal mold structure for seamless steel pipe cold-drawing machine Download PDFInfo
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- CN218743986U CN218743986U CN202223411114.4U CN202223411114U CN218743986U CN 218743986 U CN218743986 U CN 218743986U CN 202223411114 U CN202223411114 U CN 202223411114U CN 218743986 U CN218743986 U CN 218743986U
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Abstract
A straight groove internal mold structure for a seamless steel pipe cold-drawing machine belongs to the technical field of seamless steel pipe processing equipment. Comprises a straight-groove internal mold, and is characterized in that: the straight groove inner die comprises a fixed rod, a sliding die head formed at the right end of the fixed rod, a transition die head formed at the right end of the sliding die head and an inner die head formed at the right end of the transition die head, the diameter of the sliding die head is larger than that of the fixed rod and that of the inner die head, two ends of the transition die head are respectively connected with the sliding die head and the inner die head and form a tapered structure which is narrowed towards one side of the inner die head, a circle of transition die head straight groove and a circle of inner die head straight groove are respectively and evenly arranged on the circumferential surfaces of the transition die head and the inner die head, and the transition die head straight groove and the corresponding inner die head straight groove are mutually connected. The advantages are that: the condition that the seamless steel tube is broken in the cold drawing process is prevented, and the qualification rate of products is improved.
Description
Technical Field
The utility model belongs to the technical field of seamless steel pipe processing equipment, concretely relates to straight flute centre form structure that seamless steel pipe drawbench was used.
Background
The seamless steel pipe is a pipe with a very wide application range, is commonly used for manufacturing structural parts, mechanical parts, pipelines or structural parts for conveying fluid, and is a most commonly used processing method for processing the seamless steel pipe. The existing inner die is usually of a cylindrical structure, thread grooves or straight groove grooves are formed in the surface of the inner die according to the requirements of threaded holes and straight groove holes, the straight groove inner die can be matched with a cold-drawing outer die in the drawing process to enable a steel pipe to be formed in a cold-drawing mode, a certain gap exists between the seamless steel pipe and the straight groove inner die before the seamless steel pipe is subjected to cold-drawing outer allergic section sizing, the straight groove inner die enables the inner wall of the steel pipe to form a straight groove, the wall body of the steel pipe can be further thinned, the steel pipe can be broken due to sharp shrinkage, and the qualified rate of products is affected.
In view of the above, there is a need for a straight-slot inner die structure for a seamless steel pipe cold-drawing machine, which has a simple structure and can prevent the steel pipe from breaking. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.
SUMMERY OF THE UTILITY MODEL
The task of the utility model is to provide a straight flute centre form structure that seamless steel pipe drawbench was used helps improving centre form structure and makes the centre form support the steel pipe shrink deformation with the inner wall laminating of seamless steel pipe all the time drawing the in-process to be favorable to preventing the cracked condition of seamless steel pipe at the cold drawing in-process.
The utility model discloses a task is accomplished like this, a straight flute centre form structure that seamless steel pipe drawbench was used, including a straight flute centre form, the straight flute centre form including a dead lever, one constitute at the sliding die head of dead lever right-hand member, one constitute at the transition die head of sliding die head right-hand member and one constitute at the interior die head of transition die head right-hand member, sliding die head's diameter be greater than the diameter of dead lever and interior die head, transition die head both ends link up sliding die head and interior die head respectively and form the tapered structure that narrows down to interior die head one side evenly seted up round transition die head straight flute and interior die head straight flute on the periphery of transition die head and interior die head respectively, transition die head straight flute link up each other with the interior die head straight flute that corresponds.
In a specific embodiment of the present invention, the fixing rod is cylindrical and a fixing thread is formed on the cylindrical outer circumferential wall body.
In another specific embodiment of the present invention, the sliding die head and the inner die head are both cylindrical structures.
In another specific embodiment of the present invention, the fixing rod has an oil hole formed along the length direction, the oil hole extends to the right into the sliding die head, the side wall of the sliding die head has at least one oil guiding hole formed thereon, and the oil guiding holes are respectively communicated with the oil hole.
In another specific embodiment of the present invention, the included angle between the transition die head and the sliding die head is α, and the angle range of α is 160 ° to 175 °.
In yet another specific embodiment of the present invention, said angle α is preferably 170 °.
In a more specific embodiment of the present invention, the fixing rod, the sliding die, the transition die and the inner die are integrally formed and are coaxially disposed with each other.
The utility model discloses owing to adopt above-mentioned structure after, beneficial effect who has: because the conical transition die head is arranged between the inner die head and the sliding die head and is matched with the straight groove structure, the inner die is always tightly attached to the inner wall of the seamless steel pipe in the drawing process to support the shrinkage deformation of the steel pipe, the condition that the seamless steel pipe is broken in the cold drawing process is effectively prevented, and the product percent of pass is improved.
Drawings
Fig. 1 is a schematic structural view of the straight-slot inner mold according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an application of the present invention.
In the figure: 1. the internal mold comprises a straight groove internal mold, 11 parts of fixing rods, 111 parts of fixing threads, 12 parts of a sliding die head, 13 parts of a transition die head, 131 parts of a transition die head straight groove, 14 parts of an internal die head, 141 parts of an internal die head straight groove, 15 parts of oil through holes, 151 parts of oil guide holes; 2. a cold drawing die seat, 21 cold drawing dies, 211 cold drawing holes and 22 steel pipe abdicating holes; 3. seamless steel pipes; 4. an inner mold pull rod.
Detailed Description
The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, but the description of the embodiments is not intended to limit the technical solutions, and any changes made in the form of the present invention rather than the essential changes should be considered as the protection scope of the present invention.
In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and rear are based on the position of fig. 1, and thus should not be interpreted as limiting the technical solution provided by the present invention.
Referring to fig. 1, the present invention relates to a straight-groove internal mold structure for a seamless steel tube cold-drawing machine, including a straight-groove internal mold 1, the straight-groove internal mold 1 includes a fixing rod 11 integrally formed by steel, a sliding mold head 12 formed at the right end of the fixing rod 11, a transition mold head 13 formed at the right end of the sliding mold head 12 and an internal mold head 14 formed at the right end of the transition mold head 13, the diameter of the sliding mold head 12 is greater than the diameter of the fixing rod 11 and the internal mold head 14, two ends of the transition mold head 13 are respectively connected with the sliding mold head 12 and the internal mold head 14 and form a tapered structure narrowing toward one side of the internal mold head 14, a circle of transition mold head straight groove 131 and a circle of internal mold head straight groove 141 are respectively and uniformly provided on the circumferential surfaces of the transition mold head 13 and the internal mold head 14, and the transition mold head straight groove 131 and the corresponding internal mold head straight groove 141 are connected with each other. And the aforementioned fixing bar 11, slide die 12, transition die 13 and inner die 14 are coaxially arranged with each other.
Further, the fixing rod 11 is cylindrical and a fixing thread 111 is formed on the cylindrical outer peripheral wall. The aforementioned sliding die 12 and inner die 14 are both cylindrical structures. The sliding die head 12 is used for matching with the inner wall of the seamless steel pipe before contraction, the transition die head 13 is used for matching with the contracted seamless steel pipe and supporting a contraction surface and pre-pressing a straight groove, and the inner die head 14 is used for matching with the contracted seamless steel pipe and pressing an inner hole of the straight groove.
Further, an oil hole 15 is formed in the middle of the fixing rod 11 along the length direction, the oil hole 15 extends to the right into the sliding die head 12, at least one oil guide hole 151 is formed in the side wall of the sliding die head 12, and the oil guide holes 151 are respectively communicated with the oil hole 15. The number of the oil guide holes 151 is two in the present embodiment.
Further, the angle between the transition die 13 and the slide die 12 is α, the angle α is in the range of 160 ° to 175 °, and in this embodiment, the angle α is preferably 170 °.
Referring to fig. 2 in combination with fig. 1, when the straight-groove inner mold 1 needs to be used, the straight-groove inner mold 1 is fixed at an end of an inner mold pull rod 4 through a fixing thread 111, a seamless steel pipe 3 is sleeved on the straight-groove inner mold 1 and the inner mold pull rod 4, one end of the seamless steel pipe 3 passes through a cold-drawing mold base 2, the cold-drawing mold base 2 is provided with a cold-drawing mold 21, the cold-drawing mold 21 is provided with a cold-drawing hole 211, the cold-drawing mold base 2 is provided with a steel pipe abdicating hole 22 at the position of the cold-drawing hole 211, one end of the seamless steel pipe 3 passes through the cold-drawing hole 211 and the steel pipe abdicating hole 22 after being subjected to pipe contracting treatment and is fixed with a cold-drawing trolley, the cold-drawing trolley pulls the seamless steel pipe 3 to draw to the right, the seamless steel pipe 3 contracts when passing through the cold-drawing hole 211 and is supported at a contracted corner of the seamless steel pipe 3 by the transition mold head 13 during the pipe contracting process, and performs pre-pressing on the straight groove, thereby effectively avoiding the situation that the seamless steel pipe 3 is pulled apart.
Claims (7)
1. The utility model provides a straight flute centre form structure that seamless steel pipe drawbench was used, includes a straight flute centre form (1), its characterized in that: the straight-groove inner die (1) comprises a fixing rod (11), a sliding die head (12) formed at the right end of the fixing rod (11), a transition die head (13) formed at the right end of the sliding die head (12) and an inner die head (14) formed at the right end of the transition die head (13), the diameter of the sliding die head (12) is larger than that of the fixing rod (11) and that of the inner die head (14), two ends of the transition die head (13) are respectively connected with the sliding die head (12) and the inner die head (14) and form a tapered structure which is narrowed towards one side of the inner die head (14), a circle of transition die head straight groove (131) and a circle of inner die head straight groove (141) are respectively and uniformly formed on the circumferential surfaces of the transition die head (13) and the inner die head (14), and the transition die head straight groove (131) and the corresponding inner die head straight groove (141) are mutually connected.
2. The straight-groove internal mold structure for the seamless steel tube cold-drawing machine according to claim 1, characterized in that: the fixing rod (11) is cylindrical and a fixing thread (111) is formed on the cylindrical outer peripheral wall body.
3. The straight-groove internal mold structure for the seamless steel tube cold-drawing machine according to claim 1, characterized in that: the sliding die head (12) and the inner die head (14) are both cylindrical structures.
4. The straight-groove internal mold structure for the seamless steel tube cold-drawing machine according to claim 1, characterized in that: the middle of the fixing rod (11) is provided with an oil through hole (15) along the length direction, the oil through hole (15) extends rightwards into the sliding die head (12), the side wall of the sliding die head (12) is provided with at least one oil guide hole (151), and the oil guide holes (151) are respectively communicated with the oil through hole (15).
5. The straight-groove internal mold structure for the seamless steel tube cold-drawing machine according to claim 1, characterized in that: the included angle between the transition die head (13) and the sliding die head (12) is alpha, and the angle range of the alpha is 160-175 degrees.
6. The straight-groove internal mold structure for the seamless steel tube cold-drawing machine according to claim 5, characterized in that: the angle α is preferably 170 °.
7. The straight-groove internal mold structure for the seamless steel tube cold-drawing machine according to claim 1, characterized in that: the fixing rod (11), the sliding die head (12), the transition die head (13) and the inner die head (14) are integrally formed parts and are coaxially arranged with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223411114.4U CN218743986U (en) | 2022-12-19 | 2022-12-19 | Straight groove internal mold structure for seamless steel pipe cold-drawing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223411114.4U CN218743986U (en) | 2022-12-19 | 2022-12-19 | Straight groove internal mold structure for seamless steel pipe cold-drawing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218743986U true CN218743986U (en) | 2023-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223411114.4U Active CN218743986U (en) | 2022-12-19 | 2022-12-19 | Straight groove internal mold structure for seamless steel pipe cold-drawing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218743986U (en) |
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2022
- 2022-12-19 CN CN202223411114.4U patent/CN218743986U/en active Active
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