CN112296235A

CN112296235A - Copper pipe upsetting and extruding device of one-step forming crystallizer

Info

Publication number: CN112296235A
Application number: CN202011114792.7A
Authority: CN
Inventors: 孙红亮; 张相宏; 孙磊; 田小青
Original assignee: Qinhuangdao Hanfeng Changbai Crystallizer Co ltd
Current assignee: Qinhuangdao Hanfeng Changbai Crystallizer Co ltd
Priority date: 2020-10-19
Filing date: 2020-10-19
Publication date: 2021-02-02

Abstract

The invention discloses a copper pipe upsetting-extruding device of a one-step forming crystallizer, which comprises a upsetting die; wherein the mound mould is two independent bodies of the core mould of entity structure and the overcoat mould of the circular sleeve structure that has certain thick wall, the core mould can be used independently or use with overcoat mould combination, and the core mould passes through the connecting piece with the overcoat mould and is connected and constitutes detachable combination mound mould. Therefore, by designing the upsetting die which is used in a split mode or a combined mode, when the size of the cavity of the lower die female die is changed, the copper pipe extrusion forming is met through the combined upsetting die. Therefore, the combined upsetting die can meet the requirement for the change of blank upsetting specifications, reduce the manufacturing cost of a plurality of upsetting dies and be beneficial to improving the machining efficiency. The problem of traditional mound thick mould change heavy extrusion inefficiency is solved.

Description

Copper pipe upsetting and extruding device of one-step forming crystallizer

Technical Field

The invention relates to a copper pipe upsetting device of a one-step forming crystallizer, which can effectively improve the forming efficiency.

Background

The crystallizer copper tube is mainly finished by continuous casting of a copper rod, sawing of a blank, hot extrusion (including primary heating of the blank, placing of the blank in a female die cavity, upsetting of the blank by an extrusion male die, sending of the blank to an intermediate frequency furnace for secondary heating, replacement of the copper tube extrusion male die, placing of the blank in the female die cavity again, extrusion of the blank by the extrusion male die to the copper tube), cold stretching, heat treatment and electroplating. The hot extrusion process comprises a complex process that the upsetting blank can be extruded into the copper pipe only by secondarily heating the blank and secondarily replacing the extrusion male dies (the upsetting extrusion male die and the copper pipe extrusion male die). The copper pipe is processed into hundreds of types, and the copper pipe is extruded and molded by different dies. Among them, hot extrusion upsetting blank is one of the important processes for copper tube production, and besides the problems of large power consumption and low production efficiency due to the fact that the blank needs to be heated twice, extruded twice (both upsetting and extruding processes belong to the extruding process), and replaced by a medium frequency heating furnace (generally, the blank diameter after upsetting becomes larger), the upsetting die for extruding the upsetting blank is also an important part. Consequently, change according to the blank diameter, the mound mould is also along with changing, will reserve the entity mound mould of certain specification like this, and it is not only heavy to design into a plurality of entities mound moulds moreover, and manual handling is changed inconveniently, has led to the problem that the cost of manufacture of mound mould is high moreover.

Disclosure of Invention

In view of the current situation, the invention provides the upsetting-extruding device for the crystallizer copper pipe formed in one step, which not only reduces the manufacturing cost of a single upsetting die, but also is beneficial to improving the processing and forming efficiency.

The technical solution of the invention is as follows: the one-step forming crystallizer copper tube upsetting-extruding device comprises a upsetting die; the solid core mold can be used independently or combined with the blind hole outer sleeve mold, and the solid core mold and the blind hole outer sleeve mold are respectively provided with a core mold and a blind hole outer sleeve mold wrench.

In the aforesaid, the connecting piece is even, include that it has the annular groove to open radially at the entity mandrel and open with axial symmetry has the crossing T shape recess that forms of axial groove to and be equipped with the protruding bayonet lock of endotheca at the radial symmetry of blind hole overcoat mould, the position of this protruding bayonet lock equals with the radial groove position of entity mandrel, protruding bayonet lock is a round head bolt, installs in the radial screw hole of blind hole overcoat mould through the round head bolt.

Furthermore, the connecting piece is connected with the solid core die and the blind hole outer sleeve die, and through holes are formed in the radial direction of the solid core die and the blind hole outer sleeve die and are connected and fixed through positioning pins.

Furthermore, the connecting piece is connected with the core mold, and comprises positioning slot holes arranged on core mold spanners at two ends of the solid core mold, and locking screw rods and nuts hinged on outer sleeve mold spanners at two ends of the blind hole outer sleeve mold, and the locking screw rods and the nuts are in locking fit with the positioning slot holes.

The invention has the beneficial effects that: by designing the upsetting die which is used in a split mode or a combined mode, the blank is heated and then placed into the lower die concave cavity during machining, the upsetting die is placed into the concave die cavity, the blank is upset by utilizing the combined action of the extruding convex die and the upsetting die, and the upsetting die is removed after the blank is matched with the lower die concave die cavity in size. When the size of the cavity of the lower die female die is changed, the combined upsetting die meets the requirement of extrusion forming of the copper pipe. Therefore, the combined upsetting die not only saves electric energy, but also can meet blank upsetting specifications, reduces the manufacturing cost of a plurality of upsetting dies and is beneficial to improving the processing efficiency. The problems that the traditional hot extrusion process needs secondary heating and heavy extrusion die replacement are solved.

Drawings

FIG. 1 is a structural view of the present invention;

FIG. 2 is a schematic view of the assembled state of FIG. 1;

FIGS. 3 and 4 show another embodiment of different combination connections;

fig. 5 shows a reference diagram of the blank upsetting process.

Detailed Description

The invention will be further explained with reference to the embodiments of the drawings.

The upsetting device for the copper tube of the one-step forming crystallizer shown in the figures 1 to 2 comprises an upsetting die. In this embodiment, the upsetting die adopts two independent bodies, namely, a solid core die 1 and a blind hole outer sleeve die 4, and the solid core die 1 and the blind hole outer sleeve die 4 of the two independent bodies are connected into a detachable combined upsetting die a through a connecting piece. In this embodiment, the solid core mold 1 and the blind hole jacket mold 4 are respectively provided with a core mold wrench 2 and a blind hole jacket mold wrench 6. The spanner on the two bodies is convenient for carrying or combining the upsetting die. The solid core mold 1 of the present embodiment can be used independently or in combination with the blind hole outer sleeve mold 4. In the above, the connecting pieces are respectively formed by radially opening an annular groove 3 and axially symmetrically opening axial grooves 4 of the solid core mold 1 to intersect with each other to form a T-shaped groove, the T-shaped groove and the blind hole jacket mold 4 are radially and symmetrically provided with protruding bayonet locks 5 protruding towards the inner sleeve to be installed and matched, and the blind hole jacket mold 4 is embedded into the annular groove 3 of the solid core mold 1 through the protruding bayonet locks 5 with the same position as the annular groove 3 of the solid core mold 1 to be rotationally positioned. In the embodiment, the protruding bayonet 5 is a round-head bolt and is arranged in a radial screw hole of the blind hole outer sleeve die 4 through the round-head bolt. In the above, when the solid core mold 1 and the blind hole outer sleeve mold 4 are assembled, the solid core mold 1 is lifted by the core mold wrench 2, and is placed in a position corresponding to the position of the protruding bayonet 5 on the blind hole outer sleeve mold 4 with respect to the axial groove 4 on the solid core mold 1, and after the assembly, the protruding bayonet 5 of the blind hole outer sleeve mold 4 is rotationally displaced in the annular groove 3 on the solid core mold 1 by acting on the core mold wrench 2 in any direction, and is locked to form an integrated combined upsetting mold (see fig. 2). The blind hole outer sleeve die 4 cannot be used alone and must be used in combination with the solid core die 1. In the above, the solid core mold 1 is used for the blank smaller than the upsetting mold of the solid core mold 1, and the blank larger than the upsetting mold of the solid core mold 1 is formed by combining the solid core mold 1 and the blind hole outer sleeve mold 4.

Fig. 3 shows an embodiment of the connection in a different combination than that of fig. 1. It is changed correspondingly on the basis of the structure of figure 1. The same part adopts a solid core mould 1 and a blind hole outer sleeve mould 4 with the same structure. Except that the connection relationship between the solid core mold 1 and the blind hole outer sleeve mold 4 is changed. Namely, the solid core mould 1 and the blind hole outer sleeve mould 4 are respectively provided with a through hole 7 with the same central position in the radial direction, and a positioning pin 8 is inserted into the through holes 7 of the two bodies for connection and fixation. The functional function is the same as in fig. 1. The combined connecting structure omits a convex clamping pin card 5 of the blind hole outer sleeve die 4 and a T-shaped groove on the solid core die 1.

Fig. 4 shows an embodiment of the connection with different combinations of fig. 1 and 3. It adopts a solid core mould 1 and a blind hole outer sleeve mould 4 with the same structure as that of the figures 1 and 3. The difference is that the core mould wrench 2 at two ends of the solid core mould 1 is provided with a positioning slot hole 10, the outer sleeve mould wrench 6 at two ends of the blind hole outer sleeve mould 4 is hinged with a locking screw 9 and a nut 11, and the locking screw 9 and the nut 11 are locked and matched with the positioning slot hole 10. Therefore, the locking screw 9, the nut 11 and the positioning slot hole 10 are locked and matched to limit the loose and integral formation of the solid core mould 1 and the blind hole jacket mould 4 combination. The combined connecting structure omits a convex clamping pin clamp 5 of a blind hole outer sleeve die 4 in figure 1, a T-shaped groove on a solid core die 1, a through hole and a pin in figure 3.

The combined upsetting die of the invention is explained in combination with an one-time forming crystallizer copper tube upsetting process and flow. The method comprises the following steps: continuously casting a copper rod, sawing a blank, hot extruding, cold stretching, heat treating and electroplating;

wherein the hot extrusion process comprises:

1. heating the blank;

2. feeding the heated blank into a lower die concave cavity;

3. placing the upsetting die on the lower die concave cavity and the heating blank;

4. mounting an extrusion male die with specification requirements on an upper extrusion die;

5. the blank upsetting is finished by applying the descending extrusion force of the extrusion convex die to the upsetting die;

6. and withdrawing the upsetting die, and upsetting the blank by utilizing the descending extrusion action of the extrusion male die to complete the upsetting and extrusion one-step forming of the copper pipe.

Fig. 5 shows a reference diagram of the blank upsetting process. The hot extrusion upsetting process comprises the steps of firstly placing a heated blank 15 into a lower die concave cavity 13, then transferring a combined upsetting die A placed on a supporting platform 14 to a lower die concave cavity 11 and the blank 15, controlling the descending action of an upper extrusion rod 12 and an upper extrusion male die thereof to carry out upsetting on the blank 15 by the combined upsetting die A, and enabling the size of the upset blank 15 to be matched with that of the lower die concave cavity 13. And after the blank 15 is upset, withdrawing the combined upsetting die A, descending the upper extrusion rod 7 and the extrusion male die on the upper extrusion rod through an oil press to directly act on the combined upsetting die A, and completing the extrusion forming of the copper pipe 11 under the action of pressure.

After the process is optimized, one-time heating, one-time die replacement, one-time feeding and one-time intermediate-frequency heating furnace replacement are reduced, and the production efficiency is greatly improved.

Claims

1. The one-step forming crystallizer copper tube upsetting-extruding device comprises a upsetting die; the upsetting die is characterized by comprising a core die of a solid structure and two independent bodies of an outer sleeve die of a circular sleeve structure with a certain thick wall, wherein the core die can be used independently or combined with the outer sleeve die, and the core die and the outer sleeve die are connected through a connecting piece to form a detachable combined upsetting die.

2. The upsetting-extruding device for the copper tube of the one-time forming crystallizer as claimed in claim 1, wherein the connecting piece comprises an L-shaped groove formed by intersecting a symmetrical axial groove formed in the axial direction of the core mold and a symmetrical radial groove formed in the radial direction of the core mold in the opposite direction.

3. The upsetting-extruding device for the copper tube of the one-step forming crystallizer as claimed in claim 1, wherein the connecting member comprises convex clamping pins which are symmetrically and radially arranged on the outer die and protrude towards the inner diameter, the positions of the convex clamping pins are equal to the positions of the axial radial grooves of the core die, and the convex clamping pins are round head screws which are arranged in the radial screw holes of the outer die.

4. The upsetting-extruding device for the copper tube of the one-step forming crystallizer as claimed in claim 1, wherein the connecting member comprises through holes radially formed on the core die and the outer sleeve die and fixedly connected by positioning pins.