CN1242859C

CN1242859C - Screw hole type skew rolling forming method at room temperature for anode phosphor-copper

Info

Publication number: CN1242859C
Application number: CN 200410037411
Authority: CN
Inventors: 王宝雨; 胡正寰; 李玉京; 颜世公; 潘广文
Original assignee: University of Science and Technology Beijing USTB
Current assignee: University of Science and Technology Beijing USTB
Priority date: 2004-04-30
Filing date: 2004-04-30
Publication date: 2006-02-22
Anticipated expiration: 2024-04-30
Also published as: CN1569359A

Abstract

The present invention provides a process for skew rolling and forming at room temperature of phosphor bronze balls used as anodes. The present invention is characterized in that a round bronze bar is formed in a skew rolling mill at room temperature; which are provided with same pores and rotate along the same direction; the roller is mainly composed of a rib in the shape corresponding to the shape of the bronze ball, an arc-shaped groove and a straight groove; the pore has one to four heads. The rolling process proceeds continuously, one or more phosphor bronze balls are manufactured when the roller revolves for one circle, and 30 to 200 phosphor bronze balls can be manufactured in one minute. The present invention has the advantages of high productive efficiency, no need of heating, no oxidation phenomenon, less energy loss, good quality of products and low cost.

Description

A kind of anodic phosphorous copper room temperature screw groove diagonal rolling manufacturing process

Technical field:

The invention belongs to the metal forming technical field, a kind of anodic phosphorous copper room temperature screw groove diagonal rolling manufacturing process is provided especially, be applicable to the copper ball production that diameter of phi 30mm is following.

Technical background:

The oblique milling technology is the less revolving parts Plastic Forming advanced technologies of draw ratio, is usually used in the hot rolling part forming with metal materials such as various steel in the past.Though the warm-rolling system of having family steel part is shaped, its workpiece diameter is generally the following product of 6mm.Anodic phosphorous copper balls is applied to be in great demand in the electroplating technology of wiring board, and quality requirement height, diameter are generally greater than more than the 20mm.Its existing production method is to adopt to forge and the hot helical rolling shaping, exists spillage of material big, the energy consumption height, and efficient is low, the high deficiency of production cost.

Summary of the invention:

The object of the present invention is to provide a kind of screw groove diagonal rolling method, produce anodic phosphorous copper balls with the method for high efficiency, low energy consumption, the continuous Plastic Forming of high material-saving rate.

Of the present invention constituting: circular copper rod material is rolled into copper ball under the room temperature under the roll effect that has helical groove on skew rolling mill.Roll rotates a circle and produces (single head is rolling) or a plurality of (bull is a rolling) anodic phosphorous copper balls.Concrete scheme is as follows:

Two oblique roller rollings with same-handed pass, its axis intersects 2 α angles in two roller vertical plane projections, intersects the α angle with rolling centerline, α=1 °～5 °.It is identical that two rolls turn to, bar reverse rotation under the effect of roll, and along the center line axially-movable of the two roller projection angles of cut.Pass is 1～4, and one week of roll revolution is produced (single head is rolling) or a plurality of (bull is a rolling) anodic phosphorous copper balls.

Roll pass by corresponding arc-shaped slot 2 with the copper ball profile, straight trough at the bottom of 3, arc-shaped slot 4 and fin 1 constitute.In the operation of rolling fin height H by elemental height 0～3mm be increased to gradually near but be not more than the height of copper ball radius value, its Strain During Finishing Stage maximum height value is between (R～R-2mm).Arc-shaped slot 2 and the 4 corresponding intensifications of circular arc type shape groove, arc surface is shaped gradually, and arc radius R is basic identical with the product radius of being produced.This shaped segment is in the length of circumferencial direction: be 540 °～720 ° when single head is rolling, can suitably lack during bull, get 450 °～630 °.Pass through the Strain During Finishing Stage shaping again, copper ball finally is shaped.Strain During Finishing Stage is in the length of circumferencial direction: Strain During Finishing Stage is in the length of circumferencial direction: when single head is rolling be 360～450 °; When double end is rolling be 180～270 °; Three is 120～210 ° when rolling; When four-head is rolling be 90～180 °.

Bull is meant the rolling of helical groove that same flute profile is arranged more than 2 in a circumference.There are 2 of the titles of helical groove of 2 same flute profiles rolling in circumference; Have 3 of the titles of helical groove of 3 same flute profiles rolling in circumference, the rest may be inferred.When bull was rolling, roll whenever revolves to turn around can produce a plurality of copper balls, can significantly improve production efficiency.Fig. 4 is single head and double end copper ball helical groove expanded view.

The invention has the advantages that:

To compare advantage as follows with forging production method:

1) production efficiency is high about 2～3 times.Because rolling is continuous rotoforming, so roll rotational speed generally is higher than forging speed, and revolution can produce one or more copper balls, so general per minute can be produced 30 to 200 products;

2) good product quality.Forging method production has a negative impact to electroplating technology because there be " endless belt " in product.And the product that room temperature oblique milling method is produced is spherical good, the dimensional accuracy height;

3) work situation is good.Room temperature oblique milling method does not have impact shock, and noise is little.

To compare advantage as follows with the hot rolling production method:

1) energy consumption is little.Owing to need not heat, heat required energy consumption so saved;

2) good product quality.Owing to be that room temperature is rolling, product does not have oxidative phenomena, and oxidation is fatal to the influence of electroplating quality;

3) cost is low.Owing to reduced heating process, thereby reduced equipment investment, reduced energy consumption, so production cost significantly reduces.

Description of drawings:

Fig. 1 is a copper ball screw groove diagonal rolling effect schematic diagram of the present invention.

Fig. 2 is a roll of the present invention locus schematic diagram, and two roll axis are at space crossed 2 α angles.Two oblique roller rollings with same-handed pass, its axis become 2 α angles in the space, intersect the α angle with rolling centerline, α=1 °～5 °, and two rolls turn to identical.Bar reverse rotation under the effect of roll, and along the center line axially-movable of the two roller projection angles of cut.

Fig. 3 is a copper ball helical groove flute profile schematic diagram of the present invention.Wherein, at the bottom of fin 1, arc-shaped slot 2, the straight trough 3, arc-shaped slot 4.

Fig. 4 wherein schemes a single head rolling groove for the expanded view of screw groove diagonal rolling copper ball roll pass circumferencial direction of the present invention, and figure b is the double end rolling groove.

Claims

1, a kind of anodic phosphorous copper room temperature screw groove diagonal rolling manufacturing process, adopt the screw groove diagonal rolling method at room temperature to produce anodic phosphorous copper balls, it is characterized in that: the circular copper rod material roll forming on skew rolling mill that need not to heat, on skew rolling mill, adorn a pair of homodromal roll with identical pass, roll axis and rolling centerline intersect the α angle, α=1 °～5 °; Roll pass by corresponding arc-shaped slot with the copper ball profile (2), straight trough at the bottom of (3), arc-shaped slot (4) and fin (1) constitute; Pass is 1～4; The operation of rolling is carried out continuously, and roll whenever rotates a circle and produces one or more anodic phosphorous copper balls.

2, according to the described anodic phosphorous copper room temperature of claim 1 screw groove diagonal rolling manufacturing process, it is characterized in that: in the operation of rolling fin height H by elemental height 0～3mm be increased to gradually near but be not more than the height of copper ball radius R, its Strain During Finishing Stage maximum height value is between R～R-2mm; Arc-shaped slot (2) and the corresponding intensification of circular arc type shape groove (4), arc surface is shaped gradually, and mould pass arc radius R equates substantially with the product radius of being produced; This shaped segment is in the length of circumferencial direction: be 540 °～720 ° when single head is rolling, get 450 °～630 ° during bull; Pass through the Strain During Finishing Stage shaping again, copper ball finally is shaped; Strain During Finishing Stage is in the length of circumferencial direction: when single head is rolling be 360～450 °; When double end is rolling be 180～270 °; Three is 120～210 ° when rolling; When four-head is rolling be 90～180 °.