CN217141759U

CN217141759U - Ultra-thin super large width-to-width ratio copper section bar product extrusion die

Info

Publication number: CN217141759U
Application number: CN202220176898.8U
Authority: CN
Inventors: 刘锋; 陈涛; 杨婷
Original assignee: Chongqing Pigeon Electric Wire and Cable Co Ltd
Current assignee: Chongqing Pigeon Electric Wire and Cable Co Ltd
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2022-08-09
Anticipated expiration: 2032-01-21

Abstract

The utility model discloses an ultra-thin super large width is than copper ex-trusions product extrusion tooling in the copper ex-trusions production field, which comprises a body, the body middle part is equipped with the die cavity, and the die cavity is including the filling district that communicates in proper order, calibrating strap and shaping district, and filling district cross-sectional profile is the dumbbell form, and the filling district middle part is the low-speed district, and both sides are the high-speed district, and the length of high-speed district is half of low-speed district length, and the surface in low-speed district is 6-8 with the contained angle between the vertical face, and the contained angle between the surface in high-speed district and the vertical face is 10-12. The utility model discloses can solve the problem that prior art can't direct continuous production width ratio surpass 20 ultra-thin super large width ratio copper section bar product.

Description

Ultra-thin super large width-to-width ratio copper section bar product extrusion die

Technical Field

The utility model relates to a copper section production field, concretely relates to ultra-thin super large width ratio copper section product extrusion tooling.

Background

Copper is a non-ferrous metal with high conductivity and high heat dissipation rate, so that the copper is widely applied to various power utilization industries, and a conductive bar, a conductive bus and a conductive flat wire of copper and copper alloy are necessary materials for power transmission and transformation for power transmission. With the electronics industryThe continuous development of the copper conductive product has stricter requirements on the conductivity of the copper conductive product and more precise requirements on the size of the product. For conductive products such as copper bars and the like, the national standard requires that the resistivity is not more than 0.017772 omega mm ² M, hardness not less than HB65, density not less than 8.9g/cm ³ The straightness is less than or equal to 2mm/m, the fineness is 3.2, and the bending angle is 90 degrees without cracks. Under the condition of meeting the national standards, the related industries also put forward wider and thinner size requirements on the copper bar, namely, the copper bar is required to have a large cross-sectional area and a larger width ratio.

The production method of the section bar products such as the copper bar mainly comprises the following steps: the method comprises four modes of traditional extrusion, rolling, extrusion rolling combination and continuous extrusion;

traditional extrusion: copper ingot-blank preheating-extrusion-acid cleaning-straightening-multi-pass drawing-annealing-finishing drawing-sizing and saw cutting-packaging and warehousing.

Rolling: copper ingot-blank preheating-multi-pass rough rolling-multi-pass intermediate rolling-acid cleaning-finishing drawing-sizing saw cutting-packaging and warehousing.

Extrusion rolling combination: copper ingot-blank preheating-extrusion-acid cleaning-straightening-annealing-multi-pass medium rolling-finishing drawing-sizing and saw cutting-packaging and warehousing.

Continuous extrusion: upward leading a copper rod, continuously extruding, finishing and drawing, sizing and sawing, inspecting, packaging and warehousing.

The continuous extrusion technology for producing conductive profiles such as copper bars and the like has unique advantages: high productivity, low investment, low pollution and low energy consumption, and is certainly and widely applied by related industries because the physical properties of the product meet or are superior to national standards. At present, the in-process of continuous extrusion production copper section bar product, it is mainly accomplished the heating and the pressurization transport of copper product through the friction of extrusion wheel to the copper pole, the die cavity extrusion moulding of heated copper product process mould, because of the structural feature of the flat row form of copper bar product, it is inhomogeneous to lead to the metal to flow to exist in the mould inside, the main phenomenon is that the middle part velocity of flow is fast, the both sides velocity of flow is slow, both sides copper product is not filled to be full, and then product crack limit appears, twist, crooked, lack defects such as limit, seriously influence the lumber recovery. The problem is particularly obvious for the ultrathin copper profile product with the width-to-width ratio exceeding 20, mainly because the width of the product is far too large, the flow velocity difference of copper materials at the middle part and two sides in a die is large, and the technology cannot produce the ultrathin copper profile product with the width-to-width ratio due to the continuous extrusion principle, the strength and power of the extrusion friction structure and the design limitation of the existing die. To date, the widest and thinnest products produced by the existing continuous extruders are 204.5mm by 15mm, and the width-to-width ratio is 13.63. In the prior art, an ultrathin product with the width-to-width ratio exceeding 20 can only be produced to obtain a copper section semi-finished product with the width-to-width ratio of about 10 by reducing the width-to-width ratio, and then the ultrathin product is formed into the ultrathin product with the width-to-width ratio exceeding 20 by rolling, so that multiple processing is required, different production equipment is used, and the production cost and the production efficiency are difficult to meet the requirements.

SUMMERY OF THE UTILITY MODEL

The utility model discloses it is anticipated to provide an ultra-thin super large width ratio copper ex-trusions product extrusion tooling to solve the problem that prior art can't direct continuous production width ratio surpass 20's ultra-thin super large width ratio copper ex-trusions product.

In order to achieve the above purpose, the basic technical scheme of the utility model is as follows: the utility model provides an ultra-thin super large width-to-width ratio copper section bar product extrusion tooling, includes the body, and the body middle part is equipped with the die cavity, and the die cavity is including the filling zone, the calibrating strap and the shaping district that communicate in proper order, and filling zone cross sectional profile is dumbbell shape, and filling zone middle part is low speed district, and both sides are high speed district, and the length of high speed district is half of low speed district's length, and the contained angle between the surface of low speed district and the vertical plane is 6-8, and the contained angle between the surface of high speed district and the vertical plane is 10-12.

The principle and the advantages of the scheme are as follows: in practical application, in the production process of the copper section bar, copper materials are conveyed to a die after being subjected to friction heating by an extrusion wheel of a continuous extruder, the copper materials sequentially enter a filling area, a sizing belt and a forming area, the copper materials synchronously enter the filling area from two sides and the middle part, but the angle of the low-speed area in the middle part is smaller, the passing sectional area of the dumbbell-shaped middle part is smaller, the copper material is blocked more, the passing sectional areas of the dumbbell-shaped end parts at the two sides are larger, the angle of the high-speed area is larger, the copper material can pass more conveniently, the angle of the special scheme effectively balances the flow velocity of the copper materials at the middle part and two sides of the filling area, and then the copper material can fully fill the cavities on both sides after entering the forming area through the sizing belt, the copper section bar product discharged from the forming area is filled with the defects of no crack edge and no missing edge on both sides, the formed copper section bar can not be twisted and bent to deform, and the production of the ultrathin copper section bar with the width-to-width ratio exceeding 20 can be reliably and effectively completed.

Further, the depth of the low velocity region is greater than the depth of the high velocity region. As the copper material of preferring like this receives the angle restriction in the low-speed district the time through the distance longer, and the copper material in the high-speed district through the distance shorter, and the both sides of die cavity can be filled fast to the copper material in the high-speed district of both sides, guarantee that the copper material can fully be filled up and keep the speed extrusion of relative synchronization in middle part and both sides in the die cavity, guarantee that the copper section shaping quality of extruding is reliable and stable.

Further, the sizing belt is arc-shaped. Preferably, the transition between the filling area and the bearing belt is smooth, the transition between the high-speed area and the low-speed area is smooth, the middle part and two sides of the copper material extrusion process can be continuously extruded, and the defect caused by obvious shearing stress between the high-speed area and the low-speed area is avoided.

Further, the included angle between the surface of the low-speed area and the vertical plane is 6 degrees, and the included angle between the surface of the high-speed area and the vertical plane is 10 degrees. The optimal speed control can be obtained by optimizing the angle setting, and the stable and reliable quality of the extrusion molding of the copper material is ensured.

Furthermore, a guide plate is arranged on the outer side of the filling area, a dumbbell-shaped guide groove is arranged on the guide plate, and the guide groove and the filling area are concentrically arranged. Can carry out the water conservancy diversion to the copper product that gets into the die cavity through the guide plate as the preferred, ensure that the copper product can smoothly get into the die cavity, the guiding gutter that adopts dumbbell shape makes the copper product at middle part less, and the copper product of both sides is more, satisfies the demand that the copper product of both sides was filled fast in the filling district, ensures that the copper product can evenly fill up after getting into the die cavity to the shaping is high-quality copper section bar.

Further, the guide plate is integrally formed on the body. But as preferred integrated into one piece manufacturing like this, low in manufacturing cost, the cooperation precision of guiding gutter and die cavity is higher, and it is more convenient to assemble and use.

Further, the guide plate can be detachably connected to the body. Preferably, the device can be selected and used according to needs, and maintenance is convenient.

Furthermore, the depth of the diversion trench is 10-15 mm. Preferably, the diversion effect on the copper material is more stable.

Furthermore, the included angle between the surface of the low-speed area and the vertical surface and the included angle between the surface of the high-speed area and the vertical surface are increased in equal ratio to the width-to-width ratio of the copper section product. Preferably, the continuous extrusion molding can be reliably and effectively carried out on the ultrathin copper profiles with different width-to-width ratios.

Furthermore, the depth of the filling area is 4-6mm, the edge depth of the high-speed area is 4mm, and the middle depth of the low-speed area is 6 mm. As the optimization, the speed of the copper material in the filling area is controlled more uniformly, the copper materials on two sides and the copper material in the middle part keep tending to the same speed and enter the cavity, the copper material enters the cavity more smoothly, the cavity can be ensured to be filled, and the stable quality of the formed copper section is ensured.

Drawings

Fig. 1 is a plan view of embodiment 1 of the present invention;

FIG. 2 is a cross-sectional view E-E of FIG. 1;

FIG. 3 is a cross-sectional view taken at C-C of FIG. 1;

FIG. 4 is a cross-sectional view taken along line D-D of FIG. 1;

fig. 5 is a longitudinal sectional view of embodiment 4 of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a body 1, a guide plate 2, a guide groove 3, a filling area 4, a low-speed area 41, a high-speed area 42, a sizing belt 5 and a forming area 6.

Example 1, substantially as shown in figures 1 and 2: the utility model provides an ultra-thin super large width-to-width ratio copper section product extrusion tooling, includes columniform body 1, and body 1 middle part is equipped with the die cavity, and the die cavity includes from last to filling area 4, sizing zone 5 and the shaping district 6 that communicates in proper order down, and integrated into one piece has guide plate 2 on the body 1 in the 4 outsides of filling area, and guide plate 2 thickness is 10-15mm, and guiding gutter 3 has been seted up at guide plate 2 middle part, and guiding gutter 3 is the dumbbell form. The cross-sectional profile of the filling area 4 is dumbbell-shaped, the filling area 4 is in a funnel shape and transits to the calibrating strap 5, the middle part of the filling area 4 is a low-speed area 41, the two sides of the filling area 4 are high-speed areas 42, and the length L of each high-speed area 42 is half of the length L of the low-speed area 41. The included angle between the surface of the low-speed area 41 and the vertical surface and the included angle between the surface of the high-speed area 42 and the vertical surface are increased in equal ratio with the width-to-width ratio of the copper profile product. In the embodiment, as shown in fig. 3, the included angle a between the surface of the low speed zone 41 and the vertical plane is preferably 6 °, and as shown in fig. 4, the included angle B between the surface of the high speed zone 42 and the vertical plane is 10 °, so that the method is suitable for continuous extrusion molding of the ultrathin copper profile with the super-large width-to-width ratio of 20.

The depth of the filling zone 4 is 4-6mm, the depth of the low speed zone 41 is greater than that of the high speed zone 42, and the bearing 5 is arc-shaped. The high velocity zone 42 has an edge depth of 4mm and the low velocity zone 41 has a central depth of 6 mm.

The specific implementation process is as follows: the extrusion die of this scheme is assembled to current continuous extrusion machine in the copper section bar production process, and during extrusion carried extrusion die by extrusion wheel, raw and other materials copper pole, the extrusion wheel was to the in-process friction heating copper pole of copper pole transport for the copper pole forms the high-temperature high-pressure flow state before extrusion die and gets into extrusion die under the propelling movement of follow-up copper pole. The copper material gets into in the guiding gutter 3 on the guide plate 2 first after the extrusion die, and most copper material gets into from the big opening of both sides in dumbbell shape guiding gutter 3, and less copper material relatively gets into from the little opening in middle part, matches the cross sectional shape of filling area 4 like this. The copper product gets into filling zone 4 behind guiding gutter 3, and is bigger at the surface inclination of filling zone 4 both sides for the filling zone 4 space of both sides is bigger can fully hold the great a large amount of copper products that 3 both sides of guiding gutter got into, and the copper product can be more smooth and easy get into sizing belt 5 through filling zone 4. The surface inclination angle of the middle part of the filling area 4 is smaller, the depth is larger, the resistance of the copper material is larger, the extrusion speed of the middle part of the filling area 4 and the extrusion speed of the copper materials on two sides tend to be the same, the mold cavities are fully filled with the copper materials on two sides, the extrusion molding of the copper section are guaranteed to have no defects of edge cracking, edge missing, bending, twisting and the like, and the ultrathin and overlarge width ratio copper section with the width ratio reaching more than 20 can be effectively and stably continuously molded.

The die design can be used for the production of simple sectional material products by continuously extruding copper and copper alloy, and can also be used for the production of sectional materials of aluminum and aluminum alloy.

Example 2, the present example is different from example 1 only in that the included angle a between the surface of the low speed zone and the vertical plane is 7 °, and the included angle B between the surface of the high speed zone and the vertical plane is 11 °, so that the present example is suitable for continuous extrusion molding of an ultrathin copper profile with an extra-large width-to-width ratio of 21.

Example 3, this example only differs from example 1 in that the angle a between the surface of the low speed zone and the vertical plane is 8 °, and the angle B between the surface of the high speed zone and the vertical plane is 12 °, which is suitable for continuous extrusion molding of ultrathin copper profile with width ratio of 22 or more.

Embodiment 4, as shown in fig. 5, the present embodiment is different from embodiment 1 only in that the baffle is detachably connected to the body, and the specific detachable connection manner may be bolt connection, clamping connection, and the like.

The foregoing is merely an example of the present invention and common general knowledge in the art of known specific structures and/or features has not been set forth herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The utility model provides an ultra-thin super large width-to-width ratio copper section bar product extrusion tooling which characterized in that: the forming die comprises a body, wherein a die cavity is arranged in the middle of the body, the die cavity comprises a filling area, a sizing belt and a forming area which are sequentially communicated, the cross section profile of the filling area is dumbbell-shaped, the middle of the filling area is a low-speed area, two sides of the filling area are high-speed areas, the length of each high-speed area is half of that of each low-speed area, the included angle between the surface of each low-speed area and a vertical surface is 6-8 degrees, and the included angle between the surface of each high-speed area and the vertical surface is 10-12 degrees.

2. The ultra-thin copper profile product extrusion die with ultra-large width-to-width ratio as claimed in claim 1, wherein: the depth of the low velocity zone is greater than the depth of the high velocity zone.

3. The ultra-thin copper profile product extrusion die with ultra-large width-to-width ratio as claimed in claim 2, wherein: the sizing band is arc-shaped.

4. The ultra-thin copper profile product extrusion die with ultra-large width-to-width ratio as claimed in claim 1, wherein: the included angle between the surface of the low-speed area and the vertical surface is 6 degrees, and the included angle between the surface of the high-speed area and the vertical surface is 10 degrees.

5. The ultra-thin copper profile product extrusion die with ultra-large width-to-width ratio as claimed in claim 1, wherein: and a guide plate is arranged on the outer side of the filling area, a dumbbell-shaped guide groove is arranged on the guide plate, and the guide groove and the filling area are concentrically arranged.

6. The ultra-thin copper profile product extrusion die with ultra-large width-to-width ratio as claimed in claim 5, wherein: the guide plate is integrally formed on the body.

7. The ultra-thin copper profile product extrusion die with ultra-large width-to-width ratio as claimed in claim 5, wherein: the guide plate is detachably connected to the body.

8. The ultra-thin copper profile product extrusion die with ultra-large width-to-width ratio as claimed in claim 5, wherein: the depth of the diversion trench is 10-15 mm.

9. The ultra-thin copper profile product extrusion die with ultra-large width-to-width ratio as claimed in claim 1, wherein: the included angle between the surface of the low-speed area and the vertical surface and the included angle between the surface of the high-speed area and the vertical surface are increased in equal proportion to the width ratio of the copper section product.

10. The ultra-thin copper profile product extrusion die with ultra-large width-to-width ratio as claimed in claim 2, wherein: the depth of the filling area is 4-6mm, the edge depth of the high-speed area is 4mm, and the middle depth of the low-speed area is 6 mm.