CN1657193A

CN1657193A - Expansion method for eliminating slot on hollow pipe of metallic racket

Info

Publication number: CN1657193A
Application number: CN2004100046251A
Authority: CN
Inventors: 张成宗
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-02-20
Filing date: 2004-02-20
Publication date: 2005-08-24

Abstract

An expansion method for eliminating the slot on hollow pipe of metallic racket includes such steps as die pressing to make a raw metallic pipe, putting it in an external die, and using two internal tubular dies to squeeze it from its both ends.

Description

The support quadratic method of Metal racket hollow tube line trenches

Technical field

The present invention relates to a kind of Metal racket, be meant a kind of hollow metal pipe that makes in advance the type of squeezing that line trenches is arranged especially, except that wearing the wet end position line trenches at other position all overhanged outward flat, with the support quadratic method of the Metal racket hollow tube line trenches of obtaining preferable intensity moulding and neat appearance.

Background technology

A racket is at square stance, and in order not allow netting twine friction ground cause netting twine impaired, and essential design lines groove makes and wears after the net, and netting twine does not expose the screen frame outside, and utilizes the metal hollow tube to work as racket frame, and known line trenches has two kinds of practices:

(1) when squeezing type, mould is with regard to wired trench design, and therefore, the hollow frame itself that is come out by the type that squeezes all has the moulding of line trenches from the beginning to the end.

(2) on the framework extrusion die, there is not line trenches design, when a quilt squeezes the hollow frame that type comes out, before bend pipe not, by processing for the second time, do punching press at the housing of wearing the wet end position, make it form line trenches, it is neat and attractive in appearance that other position then can keep.

The advantage of known first kind of practice is that line trenches can design on extrusion die, no matter on intensity or the moulding of line trenches itself, all can not change according to design, its shortcoming then is to need the line trenches except wearing the net position, other does not need the position of line trenches to remove, and influences the clean and tidy and aesthetic feeling of product.

Though known second kind of practice is general adopted method, but there is a very big shortcoming in this method, after a hollow metal is stamped, can change its intrinsic moulding at the position that is stamped, even the structure of change material itself, weaken the compression strength of frame pipe itself, and the wet end position is just worn at high poundage in this position.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of support quadratic method of Metal racket hollow tube line trenches, refer in particular to a kind of like this support quadratic method, it mainly is to squeeze the straight metal tube that type moulding in advance all has line trenches from the beginning to the end, this metal tube is inserted one via in the specially designed external mold die cavity, make metal tube expose two free-ended endoporus, again via special design, front end has pyramidal extruding internal mold and respectively pushes from the free-ended endoporus of metal tube again and withdraw from, the line trenches that metal tube two ends can be pushed into the position overhangs outward puts down, and only keeps the line trenches of wearing the wet end position.

For this reason, the present invention proposes a kind of support quadratic method of Metal racket hollow tube line trenches, its method is:

A, in advance with the mould of tool line trenches, crowded type goes out a hollow metal pipe that all has the line trenches moulding from the beginning to the end;

B, a prefabricated external mold, this external mold is formed by upper and lower mould matched moulds, and be respectively equipped with a straight upper and lower die cavity, its length is isometric with the metal tube of preparation processing, two ends are more opening-like, behind its matched moulds, the moulding of this upper and lower die cavity will be overhanged line trenches metal tube external form afterwards by default and quilt and be matched;

C, the extruding internal mold of prefabricated two predetermined lengths again, its section are defaultly to coincide with the metal tube endoporus moulding that is overhanged after the line trenches, and these extruding internal mold front ends can be imported in the endoporus of metal tube smoothly;

D, metal tube is inserted with straightened condition and matched moulds is fixed in the upper and lower die cavity of external mold, and expose metal tube two free-ended endoporus, simultaneously, order extruding internal mold front end is over against the metal tube endoporus at external mold two ends, and can be subjected to a suitable thrust and a pulling force effect;

E, two extruding internal molds are pushed predetermined length in the metal tube endoporus respectively, the line trenches that makes metal tube be pushed into the position overhangs outward, only keeps the line trenches of wearing the wet end position, afterwards, two extruding internal molds is withdrawed from again, and all support flat program can to finish metal tube.

The support quadratic method of aforesaid Metal racket hollow tube line trenches, wherein, the front end of these extruding internal molds is provided with a bit of cone, enters in the endoporus of metal tube in order to guiding extruding internal mold.

The support quadratic method of aforesaid Metal racket hollow tube line trenches, wherein, but this external mold before the support translation is done predetermined fixed on a frame.

The support quadratic method of aforesaid Metal racket hollow tube line trenches, wherein, these push internal molds and can be set up in advance on the frame with thrust and pulling force before the support translation is done, and support in order to the extruding internal mold and put down and return action.

Therefore, the support quadratic method of Metal racket hollow tube line trenches of the present invention, can make this racket frame can be in intensity and line trenches moulding according to former design, and remove and wear the wet end position, other position all can keep the effect of neat appearance, so can improve the shortcoming of two kinds of known practices again in conjunction with the advantage of two kinds of known practices, make and obtain important breakthrough on the processing procedure.

Description of drawings

Fig. 1 is the block schematic diagram of duct trench brace quadratic method of the present invention;

Fig. 2 is the schematic appearance of prefabricated metal pipe of the present invention;

Fig. 3 is the decomposing state schematic diagram of external mold of the present invention with the extruding internal mold;

Fig. 4 inserts the schematic diagram of external mold for metal tube of the present invention;

Fig. 5 inserts the partial side, cross-sectional view of external mold for metal tube of the present invention;

Fig. 6 makes schematic diagram for the present invention pushes the support translation that internal mold pushes metal tube;

Fig. 7 is the schematic appearance after metal tube stay of the present invention is put down;

Fig. 8 is bent the side-looking floor map that is processed into metal racket frame after metal tube stay of the present invention is put down.

The drawing reference numeral explanation:

10, metal tube 11, line trenches 12, endoporus 13, free end

20, external mold 21, patrix 211, upper mould cave 22, counterdie

221, following die cavity 30, extruding internal mold 31, cone 40, extruding internal mold

41, cone 50, frame F, thrust

The specific embodiment

See also Fig. 1, the support quadratic method of Metal racket hollow tube line trenches of the present invention has following each step:

A, prefabricated metal pipe 10:

As shown in Figure 2, this metal tube 10 is to squeeze the hollow tube of type mode moulding with the mould utilization of tool line trenches, and from the beginning to the end, all has line trenches 11 moulding, for the follow-up racket frame that is made into;

B, a prefabricated external mold 20:

As shown in Figure 3, this external mold 20 is formed by a patrix 21 and a counterdie 22 matched moulds, and respectively is formed with a straight upper and lower die cavity 211,221 on it, and its length is isometric with the metal tube 10 of preparation processing, and two ends are more opening-like.Behind its matched moulds, the moulding of this upper and lower die cavity 211,221 will be overhanged line trenches 11 metal tube 10 external forms afterwards by default and quilt and be matched;

C, prefabricated two extruding internal molds 30,40:

Please cooperate shown in Figure 3 again, this extruding internal mold 30,40 is predetermined length, and section is default and overhanged line trenches 11 metal tube 10 endoporus 12 moulding afterwards coincide, but, these extruding internal mold 30,40 front ends must have a bit of cone 31,41, can guide man-hour extruding internal mold 30,40 to enter in the endoporus 12 of metal tube 10 smoothly so that add;

D, metal tube 10 is inserted in the external mold 20, locatees external mold 20 and extruding internal mold 30,40 simultaneously:

Shown in Fig. 4,5, this metal tube 10 is to insert and matched moulds is fixed in the upper and lower die cavity 211,221 of external mold 20 with straightened condition, and expose the endoporus 12 of 10 liang of free ends 13 of metal tube, in regular turn external mold 20 is fixed on the frame 50 of design again, and with two the extruding internal molds 30,40 be set up on the frame with thrust and pulling force, simultaneously, make metal tube 10 endoporus of two cones, 31,41 front ends of extruding internal mold 30,40 over against external mold 20 two ends;

E, 30,40 starts simultaneously of two extruding internal molds, finish the flat operation of support of line trenches 11:

Shown in Fig. 6,7, utilize and execute a thrust F on the frame, two extruding internal molds 30,40 are pushed predetermined length in metal tube 10 endoporus 12 respectively, the line trenches 11 that makes metal tube 10 be pushed into the position overhangs flat outward, only keeps the line trenches 11 of wearing the wet end position, afterwards, again two extruding internal molds 30,40 are pulled backward and return, and finish the flat program of whole supports, simultaneously as shown in Figure 8, the metal tube 10 after this support is put down can be again by following process to make the racket frame of expection.

Line trenches 11 support quadratic methods by metal tube 10 of the present invention, can be in conjunction with the advantage of above-mentioned two kinds of known practices, that is, utilize and squeeze type straight forming line trenches 11, because this is worn the wet end position and is not stamped and changes the structure of former moulding and material itself, therefore, compression strength and line trenches 11 moulding can not changed according to former design, and guarantee that preferable compression strength and moulding are arranged, in addition, because only form line trenches 11 wearing the wet end position, so other position can keep neat and aesthetic, relatively, can solve the shortcoming of above-mentioned two kinds of known practices, and be a breakthrough on the processing procedure.

In sum, the present invention has its splendid progressive practicality in fact in like product.

Only, the above person only is of the present invention one preferable possible embodiments, changes so use the equivalent structure that specification of the present invention and claims do such as, ought to be included in the claim of the present invention.

Claims

1, a kind of support quadratic method of Metal racket hollow tube line trenches, its method is:

2, the support quadratic method of Metal racket hollow tube line trenches as claimed in claim 1 is characterized in that: the front end of these extruding internal molds is provided with a bit of cone, enters in the endoporus of metal tube in order to guiding extruding internal mold.

3, the support quadratic method of Metal racket hollow tube line trenches as claimed in claim 1 is characterized in that: but this external mold before the support translation is done predetermined fixed on a frame.

4, the support quadratic method of Metal racket hollow tube line trenches as claimed in claim 1 is characterized in that: these push internal molds and can be set up in advance on the frame with thrust and pulling force before the support translation is done, and support in order to the extruding internal mold and put down and return action.